id
stringlengths 15
22
| version
int64 1
1
| title
stringlengths 2
372
| abstract
stringlengths 17
6.07k
| authors
listlengths 1
2.61k
| categories
listlengths 1
10
| primary_category
stringclasses 164
values | subject_area_top
stringclasses 6
values | created
stringdate 1988-11-11 00:00:00
2016-08-02 00:00:00
| updated
stringlengths 0
10
| doi
stringlengths 7
134
⌀ | journal_ref
stringlengths 6
531
⌀ | comments
stringlengths 1
1.12k
⌀ | license
stringclasses 4
values | source_format
stringclasses 1
value | fulltext_clean
stringlengths 17
6.07k
| fulltext_paragraphs
listlengths 0
34
| paragraph_count
int64 0
34
| math_expressions
listlengths 0
20
| math_count
int64 0
20
| has_math
bool 2
classes | references
listlengths 0
0
| figures
listlengths 0
0
| tokens_estimated
int64 2
1.2k
| embedding_ready_text
stringlengths 75
6.19k
| clean_level
stringclasses 1
value | extraction_quality
stringclasses 2
values | signature
stringclasses 1
value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
arXiv:hep-ex/0008010
| 1
|
Study of ATLAS Sensitivity to FCNC TOP Quark Decay t--> Zq
|
The sensitivity of ATLAS experiment to the top-quark rare decay via flavor- changing neutral currents t Zq (q represents c and u quarks) have been studied at = 14 TeV in two decay modes: 1. The pure leptonic decay of gauge bosons: t ZqWb l^{+} l^{-} j l^{+-} nu j_{b} (l=e, mu) 2. The leptonic decay of Z bosons and hadronic decay of W bosons t ZqWb l^{+} l^{-} jjjj_{b} (l=e, mu) The dominant backgrounds Z-jets, Zw and t has been analysed. The signal and backgrounds were generated via PYTHIA 5.7, simulated and analysed using ATLFAST 2.14. A branching ratio for t Zq as low as 1.1x1-^{4} for the leptonic mode and 2.3x10^{4} for hadronic mode could be discovered at the 5σlevel with an integrated luminosity of 10^{5} pb^{-1}.
|
[
{
"name": "L. Chikovani",
"orcid": null
},
{
"name": "T. Djobava",
"orcid": null
}
] |
[
"hep-ex"
] |
hep-ex
|
Other
|
2000-08-05
|
2009-11-30
| null | null |
38 pages with 8 ps figures
|
arXiv License
|
XML-ArXiv-OAI
|
The sensitivity of ATLAS experiment to the top-quark rare decay via flavor- changing neutral currents t Zq (q represents c and u quarks) have been studied at = 14 TeV in two decay modes: 1. The pure leptonic decay of gauge bosons: t ZqWb l^{+} l^{-} j l^{+-} nu j_{b} (l=e, mu) 2. The leptonic decay of Z bosons and hadronic decay of W bosons t ZqWb l^{+} l^{-} jjjj_{b} (l=e, mu) The dominant backgrounds Z-jets, Zw and t has been analysed. The signal and backgrounds were generated via PYTHIA 5.7, simulated and analysed using ATLFAST 2.14. A branching ratio for t Zq as low as 1.1x1-^{4} for the leptonic mode and 2.3x10^{4} for hadronic mode could be discovered at the 5σlevel with an integrated luminosity of 10^{5} pb^{-1}.
|
[
"The sensitivity of ATLAS experiment to the top-quark rare decay via flavor- changing neutral currents t Zq (q represents c and u quarks) have been studied at = 14 TeV in two decay modes: 1",
"The pure leptonic decay of gauge bosons: t ZqWb l^{+} l^{-} j l^{+-} nu j_{b} (l=e, mu) 2",
"The leptonic decay of Z bosons and hadronic decay of W bosons t ZqWb l^{+} l^{-} jjjj_{b} (l=e, mu) The dominant backgrounds Z-jets, Zw and t has been analysed",
"The signal and backgrounds were generated via PYTHIA 5",
"7, simulated and analysed using ATLFAST 2",
"A branching ratio for t Zq as low as 1",
"1x1-^{4} for the leptonic mode and 2",
"3x10^{4} for hadronic mode could be discovered at the 5σlevel with an integrated luminosity of 10^{5} pb^{-1}"
] | 8
|
[] | 0
| false
|
[] |
[] | 167
|
Title: Study of ATLAS Sensitivity to FCNC TOP Quark Decay t--> Zq
Categories: hep-ex
Abstract: The sensitivity of ATLAS experiment to the top-quark rare decay via flavor- changing neutral currents t Zq (q represents c and u quarks) have been studied at = 14 TeV in two decay modes: 1. The pure leptonic decay of gauge bosons: t ZqWb l^{+} l^{-} j l^{+-} nu j_{b} (l=e, mu) 2. The leptonic decay of Z bosons and hadronic decay of W bosons t ZqWb l^{+} l^{-} jjjj_{b} (l=e, mu) The dominant backgrounds Z-jets, Zw and t has been analysed. The signal and backgrounds were generated via PYTHIA 5.7, simulated and analysed using ATLFAST 2.14. A branching ratio for t Zq as low as 1.1x1-^{4} for the leptonic mode and 2.3x10^{4} for hadronic mode could be discovered at the 5σlevel with an integrated luminosity of 10^{5} pb^{-1}.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1308.3277
| 1
|
Astrogenomics: big data, old problems, old solutions?
|
The ominous warnings of a `data deluge' in the life sciences from high-throughput DNA sequencing data are being supplanted by a second deluge, of cliches bemoaning our collective scientific fate unless we address the genomic data `tsunami'. It is imperative that we explore the many facets of the genome, not just sequence but also transcriptional and epigenetic variability, integrating these observations in order to attain a genuine understanding of how genes function, towards a goal of genomics-based personalized medicine. Determining any individual's genomic properties requires comparison to many others, sifting out the specific from the trends, requiring access to the many in order to yield information relevant to the few. This is the central big data challenge in genomics that still requires some sort of resolution. Is there a practical, feasible way of directly connecting the scientific community to this data universe? The best answer could be in the stars overhead.
|
[
{
"name": "Aaron Golden",
"orcid": null
},
{
"name": "S. George Djorgovski",
"orcid": null
},
{
"name": "John M. Greally",
"orcid": null
}
] |
[
"q-bio.GN",
"astro-ph.IM"
] |
q-bio.GN
|
Other
|
2013-08-15
|
2013-08-16
| null | null |
11 pages, 1 figure, accepted for publication in Genome Biology
|
CC BY-NC
|
XML-ArXiv-OAI
|
The ominous warnings of a `data deluge' in the life sciences from high-throughput DNA sequencing data are being supplanted by a second deluge, of cliches bemoaning our collective scientific fate unless we address the genomic data `tsunami'. It is imperative that we explore the many facets of the genome, not just sequence but also transcriptional and epigenetic variability, integrating these observations in order to attain a genuine understanding of how genes function, towards a goal of genomics-based personalized medicine. Determining any individual's genomic properties requires comparison to many others, sifting out the specific from the trends, requiring access to the many in order to yield information relevant to the few. This is the central big data challenge in genomics that still requires some sort of resolution. Is there a practical, feasible way of directly connecting the scientific community to this data universe? The best answer could be in the stars overhead.
|
[
"The ominous warnings of a `data deluge' in the life sciences from high-throughput DNA sequencing data are being supplanted by a second deluge, of cliches bemoaning our collective scientific fate unless we address the genomic data `tsunami'",
"It is imperative that we explore the many facets of the genome, not just sequence but also transcriptional and epigenetic variability, integrating these observations in order to attain a genuine understanding of how genes function, towards a goal of genomics-based personalized medicine",
"Determining any individual's genomic properties requires comparison to many others, sifting out the specific from the trends, requiring access to the many in order to yield information relevant to the few",
"This is the central big data challenge in genomics that still requires some sort of resolution",
"Is there a practical, feasible way of directly connecting the scientific community to this data universe? The best answer could be in the stars overhead"
] | 5
|
[] | 0
| false
|
[] |
[] | 196
|
Title: Astrogenomics: big data, old problems, old solutions?
Categories: q-bio.GN, astro-ph.IM
Abstract: The ominous warnings of a `data deluge' in the life sciences from high-throughput DNA sequencing data are being supplanted by a second deluge, of cliches bemoaning our collective scientific fate unless we address the genomic data `tsunami'. It is imperative that we explore the many facets of the genome, not just sequence but also transcriptional and epigenetic variability, integrating these observations in order to attain a genuine understanding of how genes function, towards a goal of genomics-based personalized medicine. Determining any individual's genomic properties requires comparison to many others, sifting out the specific from the trends, requiring access to the many in order to yield information relevant to the few. This is the central big data challenge in genomics that still requires some sort of resolution. Is there a practical, feasible way of directly connecting the scientific community to this data universe? The best answer could be in the stars overhead.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1206.0432
| 1
|
M-Brane Models and Loop Spaces
|
I review an extension of the ADHMN construction of monopoles to M-brane models. This extended construction gives a map from solutions to the Basu-Harvey equation to solutions to the self-dual string equation transgressed to loop space. Loop spaces appear in fact quite naturally in M-brane models. This is demonstrated by translating a recently proposed M5-brane model to loop space. Finally, I comment on some recent developments related to the loop space approach to M-brane models.
|
[
{
"name": "Christian Saemann",
"orcid": null
}
] |
[
"hep-th"
] |
hep-th
|
Other
|
2012-06-03
|
2012-06-22
|
10.1142/S0217732312300194
|
Mod. Phys. Lett. A, Vol. 27, No. 20 (2012) 1230019
|
Invited review to appear in MPLA based on a talk given at UC Berkeley on 31.5.2011, 19 pages
|
arXiv License
|
XML-ArXiv-OAI
|
I review an extension of the ADHMN construction of monopoles to M-brane models. This extended construction gives a map from solutions to the Basu-Harvey equation to solutions to the self-dual string equation transgressed to loop space. Loop spaces appear in fact quite naturally in M-brane models. This is demonstrated by translating a recently proposed M5-brane model to loop space. Finally, I comment on some recent developments related to the loop space approach to M-brane models.
|
[
"I review an extension of the ADHMN construction of monopoles to M-brane models",
"This extended construction gives a map from solutions to the Basu-Harvey equation to solutions to the self-dual string equation transgressed to loop space",
"Loop spaces appear in fact quite naturally in M-brane models",
"This is demonstrated by translating a recently proposed M5-brane model to loop space",
"Finally, I comment on some recent developments related to the loop space approach to M-brane models"
] | 5
|
[] | 0
| false
|
[] |
[] | 97
|
Title: M-Brane Models and Loop Spaces
Categories: hep-th
Abstract: I review an extension of the ADHMN construction of monopoles to M-brane models. This extended construction gives a map from solutions to the Basu-Harvey equation to solutions to the self-dual string equation transgressed to loop space. Loop spaces appear in fact quite naturally in M-brane models. This is demonstrated by translating a recently proposed M5-brane model to loop space. Finally, I comment on some recent developments related to the loop space approach to M-brane models.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0908.3729
| 1
|
A minimal model linking two great mysteries: neutrino mass and dark matter
|
We present an economic model that establishes a link between neutrino masses and properties of the dark matter candidate. The particle content of the model can be divided into two groups: light particles with masses lighter than the electroweak scale and heavy particles. The light particles, which also include the dark matter candidate, are predicted to show up in the low energy experiments such as , making the model testable. The heavy sector can show up at the LHC and may give rise to Br() close to the present bounds. In principle, the new couplings of the model can independently be derived from the data from the LHC and from the information on neutrino masses and Lepton Flavor Violating (LFV) rare decays, providing the possibility of an intensive cross-check of the model.
|
[
{
"name": "Yasaman Farzan",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
2010-09-08
|
2010-09-09
|
10.1103/PhysRevD.80.073009
|
Phys.Rev.D80:073009,2009
|
8 pages; v2: typos corrected; references updated
|
arXiv License
|
XML-ArXiv-OAI
|
We present an economic model that establishes a link between neutrino masses and properties of the dark matter candidate. The particle content of the model can be divided into two groups: light particles with masses lighter than the electroweak scale and heavy particles. The light particles, which also include the dark matter candidate, are predicted to show up in the low energy experiments such as , making the model testable. The heavy sector can show up at the LHC and may give rise to Br() close to the present bounds. In principle, the new couplings of the model can independently be derived from the data from the LHC and from the information on neutrino masses and Lepton Flavor Violating (LFV) rare decays, providing the possibility of an intensive cross-check of the model.
|
[
"We present an economic model that establishes a link between neutrino masses and properties of the dark matter candidate",
"The particle content of the model can be divided into two groups: light particles with masses lighter than the electroweak scale and heavy particles",
"The light particles, which also include the dark matter candidate, are predicted to show up in the low energy experiments such as , making the model testable",
"The heavy sector can show up at the LHC and may give rise to Br() close to the present bounds",
"In principle, the new couplings of the model can independently be derived from the data from the LHC and from the information on neutrino masses and Lepton Flavor Violating (LFV) rare decays, providing the possibility of an intensive cross-check of the model"
] | 5
|
[
"(K\\to \\ell +{\\rm missing energy})",
"\\ell_i \\to \\ell_j γ"
] | 2
| true
|
[] |
[] | 171
|
Title: A minimal model linking two great mysteries: neutrino mass and dark matter
Categories: hep-ph
Abstract: We present an economic model that establishes a link between neutrino masses and properties of the dark matter candidate. The particle content of the model can be divided into two groups: light particles with masses lighter than the electroweak scale and heavy particles. The light particles, which also include the dark matter candidate, are predicted to show up in the low energy experiments such as , making the model testable. The heavy sector can show up at the LHC and may give rise to Br() close to the present bounds. In principle, the new couplings of the model can independently be derived from the data from the LHC and from the information on neutrino masses and Lepton Flavor Violating (LFV) rare decays, providing the possibility of an intensive cross-check of the model.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/0105199
| 1
|
Particles and fields in fluid turbulence
|
The understanding of fluid turbulence has considerably progressed in recent years. The application of the methods of statistical mechanics to the description of the motion of fluid particles, i.e. to the Lagrangian dynamics, has led to a new quantitative theory of intermittency in turbulent transport. The first analytical description of anomalous scaling laws in turbulence has been obtained. The underlying physical mechanism reveals the role of statistical integrals of motion in non-equilibrium systems. For turbulent transport, the statistical conservation laws are hidden in the evolution of groups of fluid particles and arise from the competition between the expansion of a group and the change of its geometry. By breaking the scale-invariance symmetry, the statistically conserved quantities lead to the observed anomalous scaling of transported fields. Lagrangian methods also shed new light on some practical issues, such as mixing and turbulent magnetic dynamo.
|
[
{
"name": "G. Falkovich",
"orcid": null
},
{
"name": "K. Gawedzki",
"orcid": null
},
{
"name": "M. Vergassola",
"orcid": null
}
] |
[
"cond-mat.stat-mech",
"nlin.CD",
"physics.flu-dyn"
] |
cond-mat.stat-mech
|
Other
|
2001-05-09
|
2009-11-30
|
10.1103/RevModPhys.73.913
|
Reviews of Modern Physics, Vol. 73, pp. 913-975, 2001
|
165 pages, review article for Rev. Mod. Phys
|
arXiv License
|
XML-ArXiv-OAI
|
The understanding of fluid turbulence has considerably progressed in recent years. The application of the methods of statistical mechanics to the description of the motion of fluid particles, i.e. to the Lagrangian dynamics, has led to a new quantitative theory of intermittency in turbulent transport. The first analytical description of anomalous scaling laws in turbulence has been obtained. The underlying physical mechanism reveals the role of statistical integrals of motion in non-equilibrium systems. For turbulent transport, the statistical conservation laws are hidden in the evolution of groups of fluid particles and arise from the competition between the expansion of a group and the change of its geometry. By breaking the scale-invariance symmetry, the statistically conserved quantities lead to the observed anomalous scaling of transported fields. Lagrangian methods also shed new light on some practical issues, such as mixing and turbulent magnetic dynamo.
|
[
"The understanding of fluid turbulence has considerably progressed in recent years",
"The application of the methods of statistical mechanics to the description of the motion of fluid particles, i",
"to the Lagrangian dynamics, has led to a new quantitative theory of intermittency in turbulent transport",
"The first analytical description of anomalous scaling laws in turbulence has been obtained",
"The underlying physical mechanism reveals the role of statistical integrals of motion in non-equilibrium systems",
"For turbulent transport, the statistical conservation laws are hidden in the evolution of groups of fluid particles and arise from the competition between the expansion of a group and the change of its geometry",
"By breaking the scale-invariance symmetry, the statistically conserved quantities lead to the observed anomalous scaling of transported fields",
"Lagrangian methods also shed new light on some practical issues, such as mixing and turbulent magnetic dynamo"
] | 8
|
[] | 0
| false
|
[] |
[] | 184
|
Title: Particles and fields in fluid turbulence
Categories: cond-mat.stat-mech, nlin.CD, physics.flu-dyn
Abstract: The understanding of fluid turbulence has considerably progressed in recent years. The application of the methods of statistical mechanics to the description of the motion of fluid particles, i.e. to the Lagrangian dynamics, has led to a new quantitative theory of intermittency in turbulent transport. The first analytical description of anomalous scaling laws in turbulence has been obtained. The underlying physical mechanism reveals the role of statistical integrals of motion in non-equilibrium systems. For turbulent transport, the statistical conservation laws are hidden in the evolution of groups of fluid particles and arise from the competition between the expansion of a group and the change of its geometry. By breaking the scale-invariance symmetry, the statistically conserved quantities lead to the observed anomalous scaling of transported fields. Lagrangian methods also shed new light on some practical issues, such as mixing and turbulent magnetic dynamo.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0705.3723
| 1
|
Kinetic approaches to particle acceleration at cosmic ray modified shocks
|
Kinetic approaches provide an effective description of the process of particle acceleration at shock fronts and allow to take into account the dynamical reaction of the accelerated particles as well as the amplification of the turbulent magnetic field as due to streaming instability. The latter does in turn affect the maximum achievable momentum and thereby the acceleration process itself, in a chain of causality which is typical of non-linear systems. Here we provide a technical description of two of these kinetic approaches and show that they basically lead to the same conclusions. In particular we discuss the effects of shock modification on the spectral shape of the accelerated particles, on the maximum momentum, on the thermodynamic properties of the background fluid and on the escaping and advected fluxes of accelerated particles.
|
[
{
"name": "Elena Amato",
"orcid": null
},
{
"name": "Pasquale Blasi",
"orcid": null
},
{
"name": "Stefano Gabici",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2008-01-09
|
2009-12-01
|
10.1111/j.1365-2966.2008.12876.x
| null |
22 pages, 7 figures, accepted for publication in MNRAS
|
arXiv License
|
XML-ArXiv-OAI
|
Kinetic approaches provide an effective description of the process of particle acceleration at shock fronts and allow to take into account the dynamical reaction of the accelerated particles as well as the amplification of the turbulent magnetic field as due to streaming instability. The latter does in turn affect the maximum achievable momentum and thereby the acceleration process itself, in a chain of causality which is typical of non-linear systems. Here we provide a technical description of two of these kinetic approaches and show that they basically lead to the same conclusions. In particular we discuss the effects of shock modification on the spectral shape of the accelerated particles, on the maximum momentum, on the thermodynamic properties of the background fluid and on the escaping and advected fluxes of accelerated particles.
|
[
"Kinetic approaches provide an effective description of the process of particle acceleration at shock fronts and allow to take into account the dynamical reaction of the accelerated particles as well as the amplification of the turbulent magnetic field as due to streaming instability",
"The latter does in turn affect the maximum achievable momentum and thereby the acceleration process itself, in a chain of causality which is typical of non-linear systems",
"Here we provide a technical description of two of these kinetic approaches and show that they basically lead to the same conclusions",
"In particular we discuss the effects of shock modification on the spectral shape of the accelerated particles, on the maximum momentum, on the thermodynamic properties of the background fluid and on the escaping and advected fluxes of accelerated particles"
] | 4
|
[] | 0
| false
|
[] |
[] | 170
|
Title: Kinetic approaches to particle acceleration at cosmic ray modified shocks
Categories: astro-ph
Abstract: Kinetic approaches provide an effective description of the process of particle acceleration at shock fronts and allow to take into account the dynamical reaction of the accelerated particles as well as the amplification of the turbulent magnetic field as due to streaming instability. The latter does in turn affect the maximum achievable momentum and thereby the acceleration process itself, in a chain of causality which is typical of non-linear systems. Here we provide a technical description of two of these kinetic approaches and show that they basically lead to the same conclusions. In particular we discuss the effects of shock modification on the spectral shape of the accelerated particles, on the maximum momentum, on the thermodynamic properties of the background fluid and on the escaping and advected fluxes of accelerated particles.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1412.7042
| 1
|
Localized plasmons in graphene-coated nanospheres
|
We present an analytical derivation of the electromagnetic response of a spherical object coated by a conductive film, here exemplified by a graphene coating. Applying the framework of Mie-Lorenz theory augmented to account for a conductive boundary condition, we derive the multipole scattering coefficients, modified essentially through the inclusion of an additive correction in numerator and denominator. By reductionist means, starting from the retarded response, we offer simple results in the quasistatic regime by analyzing the multipolar polarizability and associated dispersion equation for the localized plasmons. We consider graphene coatings of both dielectric and conducting spheres, where in the former case the graphene coating introduces the plasmons and in the latter case modifies in interesting ways the existing ones. Finally, we discuss our analytical results in the context of extinction cross-section and local density of states. Recent demonstrations of fabricated spherical graphene nanostructures make our study directly relevant to experiments.
|
[
{
"name": "Thomas Christensen",
"orcid": null
},
{
"name": "Antti-Pekka Jauho",
"orcid": null
},
{
"name": "Martijn Wubs",
"orcid": null
},
{
"name": "N. Asger Mortensen",
"orcid": null
}
] |
[
"cond-mat.mes-hall"
] |
cond-mat.mes-hall
|
Other
|
2014-12-22
|
2015-03-12
|
10.1103/PhysRevB.91.125414
|
Phys. Rev. B 91, 125414 (2015)
|
9 pages, 5 figures, 1 table
|
arXiv License
|
XML-ArXiv-OAI
|
We present an analytical derivation of the electromagnetic response of a spherical object coated by a conductive film, here exemplified by a graphene coating. Applying the framework of Mie-Lorenz theory augmented to account for a conductive boundary condition, we derive the multipole scattering coefficients, modified essentially through the inclusion of an additive correction in numerator and denominator. By reductionist means, starting from the retarded response, we offer simple results in the quasistatic regime by analyzing the multipolar polarizability and associated dispersion equation for the localized plasmons. We consider graphene coatings of both dielectric and conducting spheres, where in the former case the graphene coating introduces the plasmons and in the latter case modifies in interesting ways the existing ones. Finally, we discuss our analytical results in the context of extinction cross-section and local density of states. Recent demonstrations of fabricated spherical graphene nanostructures make our study directly relevant to experiments.
|
[
"We present an analytical derivation of the electromagnetic response of a spherical object coated by a conductive film, here exemplified by a graphene coating",
"Applying the framework of Mie-Lorenz theory augmented to account for a conductive boundary condition, we derive the multipole scattering coefficients, modified essentially through the inclusion of an additive correction in numerator and denominator",
"By reductionist means, starting from the retarded response, we offer simple results in the quasistatic regime by analyzing the multipolar polarizability and associated dispersion equation for the localized plasmons",
"We consider graphene coatings of both dielectric and conducting spheres, where in the former case the graphene coating introduces the plasmons and in the latter case modifies in interesting ways the existing ones",
"Finally, we discuss our analytical results in the context of extinction cross-section and local density of states",
"Recent demonstrations of fabricated spherical graphene nanostructures make our study directly relevant to experiments"
] | 6
|
[] | 0
| false
|
[] |
[] | 195
|
Title: Localized plasmons in graphene-coated nanospheres
Categories: cond-mat.mes-hall
Abstract: We present an analytical derivation of the electromagnetic response of a spherical object coated by a conductive film, here exemplified by a graphene coating. Applying the framework of Mie-Lorenz theory augmented to account for a conductive boundary condition, we derive the multipole scattering coefficients, modified essentially through the inclusion of an additive correction in numerator and denominator. By reductionist means, starting from the retarded response, we offer simple results in the quasistatic regime by analyzing the multipolar polarizability and associated dispersion equation for the localized plasmons. We consider graphene coatings of both dielectric and conducting spheres, where in the former case the graphene coating introduces the plasmons and in the latter case modifies in interesting ways the existing ones. Finally, we discuss our analytical results in the context of extinction cross-section and local density of states. Recent demonstrations of fabricated spherical graphene nanostructures make our study directly relevant to experiments.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1512.03879
| 1
|
Spontaneous Magnetization of Quark Matter in Inhomogeneous Chiral Phase
|
Considering the density wave of scalar and pseudoscalar condensates, we study the response of quark matter to a weak external magnetic field. In an external magnetic field, the energy spectrum of the lowest Landau level becomes asymmetric about zero, which is closely related to chiral anomaly. This spectral asymmetry gives rise to spontaneous magnetization. This mechanism may be one of candidates for the origin of the strong magnetic field in magnetars. Furthermore, using the generalized Ginzburg-Landau(gGL) expansion, we show that magnetic susceptibility exhibits a peculiar feature
|
[
{
"name": "Ryo Yoshiike",
"orcid": null
},
{
"name": "Kazuya Nishiyama",
"orcid": null
},
{
"name": "Toshitaka Tatsumi",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
2015-12-15
|
2015-12-16
| null | null |
3 pages, 3 figures, talk given in Quarks and Compact Stars 2014 (QCS2014), Oct. 20-22, 2014, KIAA at Peking University, Beijing, China
|
arXiv License
|
XML-ArXiv-OAI
|
Considering the density wave of scalar and pseudoscalar condensates, we study the response of quark matter to a weak external magnetic field. In an external magnetic field, the energy spectrum of the lowest Landau level becomes asymmetric about zero, which is closely related to chiral anomaly. This spectral asymmetry gives rise to spontaneous magnetization. This mechanism may be one of candidates for the origin of the strong magnetic field in magnetars. Furthermore, using the generalized Ginzburg-Landau(gGL) expansion, we show that magnetic susceptibility exhibits a peculiar feature
|
[
"Considering the density wave of scalar and pseudoscalar condensates, we study the response of quark matter to a weak external magnetic field",
"In an external magnetic field, the energy spectrum of the lowest Landau level becomes asymmetric about zero, which is closely related to chiral anomaly",
"This spectral asymmetry gives rise to spontaneous magnetization",
"This mechanism may be one of candidates for the origin of the strong magnetic field in magnetars",
"Furthermore, using the generalized Ginzburg-Landau(gGL) expansion, we show that magnetic susceptibility exhibits a peculiar feature"
] | 5
|
[] | 0
| false
|
[] |
[] | 111
|
Title: Spontaneous Magnetization of Quark Matter in Inhomogeneous Chiral Phase
Categories: hep-ph
Abstract: Considering the density wave of scalar and pseudoscalar condensates, we study the response of quark matter to a weak external magnetic field. In an external magnetic field, the energy spectrum of the lowest Landau level becomes asymmetric about zero, which is closely related to chiral anomaly. This spectral asymmetry gives rise to spontaneous magnetization. This mechanism may be one of candidates for the origin of the strong magnetic field in magnetars. Furthermore, using the generalized Ginzburg-Landau(gGL) expansion, we show that magnetic susceptibility exhibits a peculiar feature
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1301.7235
| 1
|
Progrès récents sur les fonctions normales (d'après Green-Griffiths, Brosnan-Pearlstein, M. Saito, Schnell...)
|
Given a family of smooth complex projective varieties, the Hodge conjecture predicts the algebraicity of the locus of Hodge classes. This was proven unconditionnally by Cattani, Deligne and Kaplan in 1995. In a similar way, conjectures on algebraic cycles have led Green and Griffiths to conjecture the algebraicity of the zero locus of normal functions. This corresponds to a mixed version of the theorem of Cattani, Deligne and Kaplan. This result has been proven recently by Brosnan-Pearlstein, Kato-Nakayama-Usui, and Schnell building on work of M. Saito. We will present some of the ideas around this theorem.
|
[
{
"name": "François Charles",
"orcid": null
}
] |
[
"math.AG"
] |
math.AG
|
Mathematics
|
2013-01-30
|
2013-01-31
| null | null |
30 p., séminaire Bourbaki, 65ème année, 2012-2013, exp. 1063. Comments welcome
|
arXiv License
|
XML-ArXiv-OAI
|
Given a family of smooth complex projective varieties, the Hodge conjecture predicts the algebraicity of the locus of Hodge classes. This was proven unconditionnally by Cattani, Deligne and Kaplan in 1995. In a similar way, conjectures on algebraic cycles have led Green and Griffiths to conjecture the algebraicity of the zero locus of normal functions. This corresponds to a mixed version of the theorem of Cattani, Deligne and Kaplan. This result has been proven recently by Brosnan-Pearlstein, Kato-Nakayama-Usui, and Schnell building on work of M. Saito. We will present some of the ideas around this theorem.
|
[
"Given a family of smooth complex projective varieties, the Hodge conjecture predicts the algebraicity of the locus of Hodge classes",
"This was proven unconditionnally by Cattani, Deligne and Kaplan in 1995",
"In a similar way, conjectures on algebraic cycles have led Green and Griffiths to conjecture the algebraicity of the zero locus of normal functions",
"This corresponds to a mixed version of the theorem of Cattani, Deligne and Kaplan",
"This result has been proven recently by Brosnan-Pearlstein, Kato-Nakayama-Usui, and Schnell building on work of M",
"We will present some of the ideas around this theorem"
] | 6
|
[] | 0
| false
|
[] |
[] | 124
|
Title: Progrès récents sur les fonctions normales (d'après Green-Griffiths, Brosnan-Pearlstein, M. Saito, Schnell...)
Categories: math.AG
Abstract: Given a family of smooth complex projective varieties, the Hodge conjecture predicts the algebraicity of the locus of Hodge classes. This was proven unconditionnally by Cattani, Deligne and Kaplan in 1995. In a similar way, conjectures on algebraic cycles have led Green and Griffiths to conjecture the algebraicity of the zero locus of normal functions. This corresponds to a mixed version of the theorem of Cattani, Deligne and Kaplan. This result has been proven recently by Brosnan-Pearlstein, Kato-Nakayama-Usui, and Schnell building on work of M. Saito. We will present some of the ideas around this theorem.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ph/9510398
| 1
|
A Perturbative Expansion for Weakly Bound States
|
We describe a perturbation expansion for the energy and wave function of a weakly bound particle in a short-range potential in one space dimension.
|
[
{
"name": "Hael Collins",
"orcid": null
},
{
"name": "Howard Georgi",
"orcid": null
},
{
"name": "David Zeltser",
"orcid": null
}
] |
[
"hep-ph",
"quant-ph"
] |
hep-ph
|
Other
|
1995-10-28
|
2009-11-30
| null | null |
7 pages (LaTeX) with 4 figures; requires prepictex, pictex, and postpictex. The LaTeX code has been made compatible with the archive's auto-postscript program; no changes have been made to the paper
|
arXiv License
|
XML-ArXiv-OAI
|
We describe a perturbation expansion for the energy and wave function of a weakly bound particle in a short-range potential in one space dimension.
|
[
"We describe a perturbation expansion for the energy and wave function of a weakly bound particle in a short-range potential in one space dimension"
] | 1
|
[] | 0
| false
|
[] |
[] | 31
|
Title: A Perturbative Expansion for Weakly Bound States
Categories: hep-ph, quant-ph
Abstract: We describe a perturbation expansion for the energy and wave function of a weakly bound particle in a short-range potential in one space dimension.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1501.06706
| 1
|
Lattice simulations of $G_2$-QCD at finite density
|
-QCD, in which the exceptional Lie group replaces the gauge group of QCD, does not suffer from a fermion sign problem. It can therefore be simulated also at comparatively low temperatures and high densities on the lattice, which hence allows to map out the phase diagram of this QCD-like theory. We briefly review some of our previous results from such finite density simulations to then present further evidence for a first-order transition to what might be called -nuclear matter. In order to isolate diquark condensation effects, we introduce simulations with Majorana fermions and diquark sources. This allows to disentangle states in the spectrum that are connected by charge conjugation. We discuss chiral symmetry in the presence of diquark sources and present first results from our ongoing large-scale simulations.
|
[
{
"name": "Bjoern H. Wellegehausen",
"orcid": null
},
{
"name": "Lorenz von Smekal",
"orcid": null
}
] |
[
"hep-lat"
] |
hep-lat
|
Other
|
2015-01-27
|
2015-01-28
| null | null |
14 pages, 10 figures, talk presented at the 32nd International Symposium on Lattice Field Theory - Lattice 2014, June 23-28, 2014, Columbia University New York, NY
|
arXiv License
|
XML-ArXiv-OAI
|
-QCD, in which the exceptional Lie group replaces the gauge group of QCD, does not suffer from a fermion sign problem. It can therefore be simulated also at comparatively low temperatures and high densities on the lattice, which hence allows to map out the phase diagram of this QCD-like theory. We briefly review some of our previous results from such finite density simulations to then present further evidence for a first-order transition to what might be called -nuclear matter. In order to isolate diquark condensation effects, we introduce simulations with Majorana fermions and diquark sources. This allows to disentangle states in the spectrum that are connected by charge conjugation. We discuss chiral symmetry in the presence of diquark sources and present first results from our ongoing large-scale simulations.
|
[
"-QCD, in which the exceptional Lie group replaces the gauge group of QCD, does not suffer from a fermion sign problem",
"It can therefore be simulated also at comparatively low temperatures and high densities on the lattice, which hence allows to map out the phase diagram of this QCD-like theory",
"We briefly review some of our previous results from such finite density simulations to then present further evidence for a first-order transition to what might be called -nuclear matter",
"In order to isolate diquark condensation effects, we introduce simulations with Majorana fermions and diquark sources",
"This allows to disentangle states in the spectrum that are connected by charge conjugation",
"We discuss chiral symmetry in the presence of diquark sources and present first results from our ongoing large-scale simulations"
] | 6
|
[
"G_2",
"G_2",
"SU(3)",
"G_2"
] | 4
| true
|
[] |
[] | 166
|
Title: Lattice simulations of $G_2$-QCD at finite density
Categories: hep-lat
Abstract: -QCD, in which the exceptional Lie group replaces the gauge group of QCD, does not suffer from a fermion sign problem. It can therefore be simulated also at comparatively low temperatures and high densities on the lattice, which hence allows to map out the phase diagram of this QCD-like theory. We briefly review some of our previous results from such finite density simulations to then present further evidence for a first-order transition to what might be called -nuclear matter. In order to isolate diquark condensation effects, we introduce simulations with Majorana fermions and diquark sources. This allows to disentangle states in the spectrum that are connected by charge conjugation. We discuss chiral symmetry in the presence of diquark sources and present first results from our ongoing large-scale simulations.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0804.1858
| 1
|
Special Kahler Metrics on Complex Line Bundles and the Geometry of $K3$-Surfaces
|
We construct metrics with the holonomy group SU(2) on the tangent bundles of weighted complex projective lines and give a geometric description of the moduli space of special Kahler metrics on a K3-surface in the neighborhood of the flat orbifold .
|
[
{
"name": "Yaroslav V. Bazaikin",
"orcid": null
}
] |
[
"math.DG"
] |
math.DG
|
Mathematics
|
2008-04-11
|
2009-12-01
| null |
Siberian Mathematical Journal 46 (2005), N.6, P.995-1004
|
14 pages
|
arXiv License
|
XML-ArXiv-OAI
|
We construct metrics with the holonomy group SU(2) on the tangent bundles of weighted complex projective lines and give a geometric description of the moduli space of special Kahler metrics on a K3-surface in the neighborhood of the flat orbifold .
|
[
"We construct metrics with the holonomy group SU(2) on the tangent bundles of weighted complex projective lines and give a geometric description of the moduli space of special Kahler metrics on a K3-surface in the neighborhood of the flat orbifold"
] | 1
|
[
"T^4/Z_3"
] | 1
| true
|
[] |
[] | 53
|
Title: Special Kahler Metrics on Complex Line Bundles and the Geometry of $K3$-Surfaces
Categories: math.DG
Abstract: We construct metrics with the holonomy group SU(2) on the tangent bundles of weighted complex projective lines and give a geometric description of the moduli space of special Kahler metrics on a K3-surface in the neighborhood of the flat orbifold .
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ph/9609347
| 1
|
Observability at LEP2 hadronic channels of a Z' with small lepton couplings
|
We consider the effects of a number of models with one extra , with enhanced couplings to quarks, in the final channels at LEP2. We show that, for a number of representative cases, visible effects could be produced even for very low values of the couplings, much smaller than the existing LEP1/SLC and the future LEP2 (lepton channel) bounds.
|
[
{
"name": "G. Montagna",
"orcid": null
},
{
"name": "F. Piccinini",
"orcid": null
},
{
"name": "J. Layssac",
"orcid": null
},
{
"name": "F. M. Renard",
"orcid": null
},
{
"name": "C. Verzegnassi",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
1996-09-13
|
2009-11-30
| null |
Z.Phys. C75 (1997) 641-649
|
13 pages and 9 figures e-mail: renard@lpmsun2.lpm.univ-montp2.fr
|
arXiv License
|
XML-ArXiv-OAI
|
We consider the effects of a number of models with one extra , with enhanced couplings to quarks, in the final channels at LEP2. We show that, for a number of representative cases, visible effects could be produced even for very low values of the couplings, much smaller than the existing LEP1/SLC and the future LEP2 (lepton channel) bounds.
|
[
"We consider the effects of a number of models with one extra , with enhanced couplings to quarks, in the final channels at LEP2",
"We show that, for a number of representative cases, visible effects could be produced even for very low values of the couplings, much smaller than the existing LEP1/SLC and the future LEP2 (lepton channel) bounds"
] | 2
|
[
"Z"
] | 1
| true
|
[] |
[] | 76
|
Title: Observability at LEP2 hadronic channels of a Z' with small lepton couplings
Categories: hep-ph
Abstract: We consider the effects of a number of models with one extra , with enhanced couplings to quarks, in the final channels at LEP2. We show that, for a number of representative cases, visible effects could be produced even for very low values of the couplings, much smaller than the existing LEP1/SLC and the future LEP2 (lepton channel) bounds.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1310.0142
| 1
|
Theory of supercurrent transport in SIsFS Josephson junctions
|
We present the results of theoretical study of Current-Phase Relations (CPR) in Josephson junctions of SIsFS type, where 'S' is a bulk superconductor and 'IsF' is a complex weak link consisting of a superconducting film 's', a metallic ferromagnet 'F' and an insulating barrier 'I'. We calculate the relationship between Josephson current and phase difference. At temperatures close to critical, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures numerical method is developed to solve selfconsistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes which is caused by shifting the location of a weak link from the tunnel barrier 'I' to the F-layer. We show that strong deviations of the CPR from sinusoidal shape occur even in a vicinity of Tc, and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and pi states in the contact and show that smoothness of this transition strongly depends on the CPR shape.
|
[
{
"name": "S. V. Bakurskiy",
"orcid": null
},
{
"name": "N. V. Klenov",
"orcid": null
},
{
"name": "I. I. Soloviev",
"orcid": null
},
{
"name": "M. Yu. Kupriyanov",
"orcid": null
},
{
"name": "A. A. Golubov",
"orcid": null
}
] |
[
"cond-mat.supr-con",
"cond-mat.mes-hall",
"cond-mat.str-el"
] |
cond-mat.supr-con
|
Other
|
2013-10-01
|
2015-06-17
|
10.1103/PhysRevB.88.144519
| null |
14 pages, 8 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We present the results of theoretical study of Current-Phase Relations (CPR) in Josephson junctions of SIsFS type, where 'S' is a bulk superconductor and 'IsF' is a complex weak link consisting of a superconducting film 's', a metallic ferromagnet 'F' and an insulating barrier 'I'. We calculate the relationship between Josephson current and phase difference. At temperatures close to critical, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures numerical method is developed to solve selfconsistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes which is caused by shifting the location of a weak link from the tunnel barrier 'I' to the F-layer. We show that strong deviations of the CPR from sinusoidal shape occur even in a vicinity of Tc, and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and pi states in the contact and show that smoothness of this transition strongly depends on the CPR shape.
|
[
"We present the results of theoretical study of Current-Phase Relations (CPR) in Josephson junctions of SIsFS type, where 'S' is a bulk superconductor and 'IsF' is a complex weak link consisting of a superconducting film 's', a metallic ferromagnet 'F' and an insulating barrier 'I'",
"We calculate the relationship between Josephson current and phase difference",
"At temperatures close to critical, calculations are performed analytically in the frame of the Ginsburg-Landau equations",
"At low temperatures numerical method is developed to solve selfconsistently the Usadel equations in the structure",
"We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes",
"We study the crossover between these regimes which is caused by shifting the location of a weak link from the tunnel barrier 'I' to the F-layer",
"We show that strong deviations of the CPR from sinusoidal shape occur even in a vicinity of Tc, and these deviations are strongest in the crossover regime",
"We demonstrate the existence of temperature-induced crossover between 0 and pi states in the contact and show that smoothness of this transition strongly depends on the CPR shape"
] | 8
|
[] | 0
| false
|
[] |
[] | 253
|
Title: Theory of supercurrent transport in SIsFS Josephson junctions
Categories: cond-mat.supr-con, cond-mat.mes-hall, cond-mat.str-el
Abstract: We present the results of theoretical study of Current-Phase Relations (CPR) in Josephson junctions of SIsFS type, where 'S' is a bulk superconductor and 'IsF' is a complex weak link consisting of a superconducting film 's', a metallic ferromagnet 'F' and an insulating barrier 'I'. We calculate the relationship between Josephson current and phase difference. At temperatures close to critical, calculations are performed analytically in the frame of the Ginsburg-Landau equations. At low temperatures numerical method is developed to solve selfconsistently the Usadel equations in the structure. We demonstrate that SIsFS junctions have several distinct regimes of supercurrent transport and we examine spatial distributions of the pair potential across the structure in different regimes. We study the crossover between these regimes which is caused by shifting the location of a weak link from the tunnel barrier 'I' to the F-layer. We show that strong deviations of the CPR from sinusoidal shape occur even in a vicinity of Tc, and these deviations are strongest in the crossover regime. We demonstrate the existence of temperature-induced crossover between 0 and pi states in the contact and show that smoothness of this transition strongly depends on the CPR shape.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:quant-ph/0510149
| 1
|
Correlated Photons from Collective Excitations of Three-Level Atomic Ensemble
|
We systematically study the interaction between two quantized optical fields and a cyclic atomic ensemble driven by a classic optical field. This so-called atomic cyclic ensemble consists of three-level atoms with Delta-type transitions due to the symmetry breaking, which can also be implemented in the superconducting quantum circuit by Yu-xi Liu et al. [Phys. Rev. Lett. 95, 087001 (2005)]. We explore the dynamic mechanisms to creating the quantum entanglements among photon states, and between photons and atomic collective excitations by the coherent manipulation of the atom-photon system. It is shown that the quantum information can be completely transferred from one quantized optical mode to another, and the quantum information carried by the two quantized optical fields can be stored in the collective modes of this atomic ensemble by adiabatically controlling the classic field Rabi frequencies.
|
[
{
"name": "Yong Li",
"orcid": null
},
{
"name": "Li Zheng",
"orcid": null
},
{
"name": "Yu-xi Liu",
"orcid": null
},
{
"name": "C. P. Sun",
"orcid": null
}
] |
[
"quant-ph"
] |
quant-ph
|
Other
|
2006-05-16
|
2009-12-01
|
10.1103/PhysRevA.73.043805
|
Phys. Rev. A 73, 043805 (2006)
|
10 pages, 2 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We systematically study the interaction between two quantized optical fields and a cyclic atomic ensemble driven by a classic optical field. This so-called atomic cyclic ensemble consists of three-level atoms with Delta-type transitions due to the symmetry breaking, which can also be implemented in the superconducting quantum circuit by Yu-xi Liu et al. [Phys. Rev. Lett. 95, 087001 (2005)]. We explore the dynamic mechanisms to creating the quantum entanglements among photon states, and between photons and atomic collective excitations by the coherent manipulation of the atom-photon system. It is shown that the quantum information can be completely transferred from one quantized optical mode to another, and the quantum information carried by the two quantized optical fields can be stored in the collective modes of this atomic ensemble by adiabatically controlling the classic field Rabi frequencies.
|
[
"We systematically study the interaction between two quantized optical fields and a cyclic atomic ensemble driven by a classic optical field",
"This so-called atomic cyclic ensemble consists of three-level atoms with Delta-type transitions due to the symmetry breaking, which can also be implemented in the superconducting quantum circuit by Yu-xi Liu et al",
"We explore the dynamic mechanisms to creating the quantum entanglements among photon states, and between photons and atomic collective excitations by the coherent manipulation of the atom-photon system",
"It is shown that the quantum information can be completely transferred from one quantized optical mode to another, and the quantum information carried by the two quantized optical fields can be stored in the collective modes of this atomic ensemble by adiabatically controlling the classic field Rabi frequencies"
] | 4
|
[] | 0
| false
|
[] |
[] | 175
|
Title: Correlated Photons from Collective Excitations of Three-Level Atomic Ensemble
Categories: quant-ph
Abstract: We systematically study the interaction between two quantized optical fields and a cyclic atomic ensemble driven by a classic optical field. This so-called atomic cyclic ensemble consists of three-level atoms with Delta-type transitions due to the symmetry breaking, which can also be implemented in the superconducting quantum circuit by Yu-xi Liu et al. [Phys. Rev. Lett. 95, 087001 (2005)]. We explore the dynamic mechanisms to creating the quantum entanglements among photon states, and between photons and atomic collective excitations by the coherent manipulation of the atom-photon system. It is shown that the quantum information can be completely transferred from one quantized optical mode to another, and the quantum information carried by the two quantized optical fields can be stored in the collective modes of this atomic ensemble by adiabatically controlling the classic field Rabi frequencies.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-lat/0011028
| 1
|
Recent Progress of Lattice QCD in China
|
Lattice QCD is the most reliable non-perturbative method in quantum field theory. In the last few years, some problems crucial to high energy experiments have been solved. We review some recent work done by the Chinese lattice community.
|
[
{
"name": "Xiang-Qian Luo",
"orcid": null
},
{
"name": "Eric B. Gregory",
"orcid": null
}
] |
[
"hep-lat"
] |
hep-lat
|
Other
|
2000-11-03
|
2009-11-30
| null |
Proceedings of the Third Joint Meeting of Chinese Physicists Worldwide, World Scientific, Singapore (2002) 200-202
|
Invited contribution to the Third Joint Meeting of Chinese Physicists Worldwide, Hong Kong, July 31-August 4, 2000. To be published by World Scientific (Singapore). Latex (with ltwol.sty)
|
arXiv License
|
XML-ArXiv-OAI
|
Lattice QCD is the most reliable non-perturbative method in quantum field theory. In the last few years, some problems crucial to high energy experiments have been solved. We review some recent work done by the Chinese lattice community.
|
[
"Lattice QCD is the most reliable non-perturbative method in quantum field theory",
"In the last few years, some problems crucial to high energy experiments have been solved",
"We review some recent work done by the Chinese lattice community"
] | 3
|
[] | 0
| false
|
[] |
[] | 49
|
Title: Recent Progress of Lattice QCD in China
Categories: hep-lat
Abstract: Lattice QCD is the most reliable non-perturbative method in quantum field theory. In the last few years, some problems crucial to high energy experiments have been solved. We review some recent work done by the Chinese lattice community.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1212.3043
| 1
|
Theoretical Treatments of the Bound-Free Contribution and Experimental Best Practice in X-ray Thomson Scattering from Warm Dense Matter
|
By comparison with high-resolution synchrotron x-ray experimental results, we assess several theoretical treatments for the bound-free (core-electron) contribution to x-ray Thomson scattering (i.e., also known as nonresonant inelastic x-ray scattering). We identify an often overlooked source of systematic error in the plane- wave form factor approximation (PWFFA) used in the inference of temperature, ionization state, and free electron density in some laser-driven compression studies of warm dense matter. This error is due to a direct violation of energy conservation in the PWFFA. We propose an improved practice for the bound-free term that will be particularly relevant for XRTS experiments performed with somewhat improved energy resolution at the National Ignition Facility or the Linac Coherent Light Source. Our results raise important questions about the accuracy of state variable determination in XRTS studies, given that the limited information content in low-resolution XRTS spectra does not strongly constrain the models of electronic structure being used to fit the spectra.
|
[
{
"name": "Brian A. Mattern",
"orcid": null
},
{
"name": "Gerald T. Seidler",
"orcid": null
}
] |
[
"physics.plasm-ph",
"cond-mat.other"
] |
physics.plasm-ph
|
Physics
|
2012-12-13
|
2013-06-26
|
10.1063/1.4790659
| null | null |
arXiv License
|
XML-ArXiv-OAI
|
By comparison with high-resolution synchrotron x-ray experimental results, we assess several theoretical treatments for the bound-free (core-electron) contribution to x-ray Thomson scattering (i.e., also known as nonresonant inelastic x-ray scattering). We identify an often overlooked source of systematic error in the plane- wave form factor approximation (PWFFA) used in the inference of temperature, ionization state, and free electron density in some laser-driven compression studies of warm dense matter. This error is due to a direct violation of energy conservation in the PWFFA. We propose an improved practice for the bound-free term that will be particularly relevant for XRTS experiments performed with somewhat improved energy resolution at the National Ignition Facility or the Linac Coherent Light Source. Our results raise important questions about the accuracy of state variable determination in XRTS studies, given that the limited information content in low-resolution XRTS spectra does not strongly constrain the models of electronic structure being used to fit the spectra.
|
[
"By comparison with high-resolution synchrotron x-ray experimental results, we assess several theoretical treatments for the bound-free (core-electron) contribution to x-ray Thomson scattering (i",
", also known as nonresonant inelastic x-ray scattering)",
"We identify an often overlooked source of systematic error in the plane- wave form factor approximation (PWFFA) used in the inference of temperature, ionization state, and free electron density in some laser-driven compression studies of warm dense matter",
"This error is due to a direct violation of energy conservation in the PWFFA",
"We propose an improved practice for the bound-free term that will be particularly relevant for XRTS experiments performed with somewhat improved energy resolution at the National Ignition Facility or the Linac Coherent Light Source",
"Our results raise important questions about the accuracy of state variable determination in XRTS studies, given that the limited information content in low-resolution XRTS spectra does not strongly constrain the models of electronic structure being used to fit the spectra"
] | 6
|
[] | 0
| false
|
[] |
[] | 202
|
Title: Theoretical Treatments of the Bound-Free Contribution and Experimental Best Practice in X-ray Thomson Scattering from Warm Dense Matter
Categories: physics.plasm-ph, cond-mat.other
Abstract: By comparison with high-resolution synchrotron x-ray experimental results, we assess several theoretical treatments for the bound-free (core-electron) contribution to x-ray Thomson scattering (i.e., also known as nonresonant inelastic x-ray scattering). We identify an often overlooked source of systematic error in the plane- wave form factor approximation (PWFFA) used in the inference of temperature, ionization state, and free electron density in some laser-driven compression studies of warm dense matter. This error is due to a direct violation of energy conservation in the PWFFA. We propose an improved practice for the bound-free term that will be particularly relevant for XRTS experiments performed with somewhat improved energy resolution at the National Ignition Facility or the Linac Coherent Light Source. Our results raise important questions about the accuracy of state variable determination in XRTS studies, given that the limited information content in low-resolution XRTS spectra does not strongly constrain the models of electronic structure being used to fit the spectra.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:quant-ph/9911041
| 1
|
Quantum Computer Emulator
|
We describe a quantum computer emulator for a generic, general purpose quantum computer. This emulator consists of a simulator of the physical realization of the quantum computer and a graphical user interface to program and control the simulator. We illustrate the use of the quantum computer emulator through various implementations of the Deutsch-Jozsa and Grover's database search algorithm.
|
[
{
"name": "Hans De Raedt",
"orcid": null
},
{
"name": "Anthony Hams",
"orcid": null
},
{
"name": "Kristel Michielsen",
"orcid": null
},
{
"name": "Koen De Raedt",
"orcid": null
}
] |
[
"quant-ph"
] |
quant-ph
|
Other
|
2000-03-29
|
2009-12-01
|
10.1016/S0010-4655(00)00132-6
| null |
28 pages, 4, figures, see also http://rugth30.phys.rug.nl/compphys/qce.htm ; figures updated, instructions changed
|
arXiv License
|
XML-ArXiv-OAI
|
We describe a quantum computer emulator for a generic, general purpose quantum computer. This emulator consists of a simulator of the physical realization of the quantum computer and a graphical user interface to program and control the simulator. We illustrate the use of the quantum computer emulator through various implementations of the Deutsch-Jozsa and Grover's database search algorithm.
|
[
"We describe a quantum computer emulator for a generic, general purpose quantum computer",
"This emulator consists of a simulator of the physical realization of the quantum computer and a graphical user interface to program and control the simulator",
"We illustrate the use of the quantum computer emulator through various implementations of the Deutsch-Jozsa and Grover's database search algorithm"
] | 3
|
[] | 0
| false
|
[] |
[] | 75
|
Title: Quantum Computer Emulator
Categories: quant-ph
Abstract: We describe a quantum computer emulator for a generic, general purpose quantum computer. This emulator consists of a simulator of the physical realization of the quantum computer and a graphical user interface to program and control the simulator. We illustrate the use of the quantum computer emulator through various implementations of the Deutsch-Jozsa and Grover's database search algorithm.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cs/0212044
| 1
|
Solving a "Hard" Problem to Approximate an "Easy" One: Heuristics for Maximum Matchings and Maximum Traveling Salesman Problems
|
We consider geometric instances of the Maximum Weighted Matching Problem (MWMP) and the Maximum Traveling Salesman Problem (MTSP) with up to 3,000,000 vertices. Making use of a geometric duality relationship between MWMP, MTSP, and the Fermat-Weber-Problem (FWP), we develop a heuristic approach that yields in near-linear time solutions as well as upper bounds. Using various computational tools, we get solutions within considerably less than 1% of the optimum. An interesting feature of our approach is that, even though an FWP is hard to compute in theory and Edmonds' algorithm for maximum weighted matching yields a polynomial solution for the MWMP, the practical behavior is just the opposite, and we can solve the FWP with high accuracy in order to find a good heuristic solution for the MWMP.
|
[
{
"name": "Sandor P. Fekete",
"orcid": null
},
{
"name": "Henk Meijer",
"orcid": null
},
{
"name": "Andre Rohe",
"orcid": null
},
{
"name": "Walter Tietze",
"orcid": null
}
] |
[
"cs.DS"
] |
cs.DS
|
Computer Science
|
2002-12-16
|
2009-11-30
| null |
Journal of Experimental Algorithms, 7 (2002), article 11.
|
20 pages, 14 figures, Latex, to appear in Journal of Experimental Algorithms, 2002
|
arXiv License
|
XML-ArXiv-OAI
|
We consider geometric instances of the Maximum Weighted Matching Problem (MWMP) and the Maximum Traveling Salesman Problem (MTSP) with up to 3,000,000 vertices. Making use of a geometric duality relationship between MWMP, MTSP, and the Fermat-Weber-Problem (FWP), we develop a heuristic approach that yields in near-linear time solutions as well as upper bounds. Using various computational tools, we get solutions within considerably less than 1% of the optimum. An interesting feature of our approach is that, even though an FWP is hard to compute in theory and Edmonds' algorithm for maximum weighted matching yields a polynomial solution for the MWMP, the practical behavior is just the opposite, and we can solve the FWP with high accuracy in order to find a good heuristic solution for the MWMP.
|
[
"We consider geometric instances of the Maximum Weighted Matching Problem (MWMP) and the Maximum Traveling Salesman Problem (MTSP) with up to 3,000,000 vertices",
"Making use of a geometric duality relationship between MWMP, MTSP, and the Fermat-Weber-Problem (FWP), we develop a heuristic approach that yields in near-linear time solutions as well as upper bounds",
"Using various computational tools, we get solutions within considerably less than 1% of the optimum",
"An interesting feature of our approach is that, even though an FWP is hard to compute in theory and Edmonds' algorithm for maximum weighted matching yields a polynomial solution for the MWMP, the practical behavior is just the opposite, and we can solve the FWP with high accuracy in order to find a good heuristic solution for the MWMP"
] | 4
|
[] | 0
| false
|
[] |
[] | 165
|
Title: Solving a "Hard" Problem to Approximate an "Easy" One: Heuristics for Maximum Matchings and Maximum Traveling Salesman Problems
Categories: cs.DS
Abstract: We consider geometric instances of the Maximum Weighted Matching Problem (MWMP) and the Maximum Traveling Salesman Problem (MTSP) with up to 3,000,000 vertices. Making use of a geometric duality relationship between MWMP, MTSP, and the Fermat-Weber-Problem (FWP), we develop a heuristic approach that yields in near-linear time solutions as well as upper bounds. Using various computational tools, we get solutions within considerably less than 1% of the optimum. An interesting feature of our approach is that, even though an FWP is hard to compute in theory and Edmonds' algorithm for maximum weighted matching yields a polynomial solution for the MWMP, the practical behavior is just the opposite, and we can solve the FWP with high accuracy in order to find a good heuristic solution for the MWMP.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1210.6046
| 1
|
The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo
|
We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of Galaxy-size dark matter halos in existence to constrain the mass of the Milky Way's dark matter halo (M_MW). Despite Leo I's large Galacto-centric space velocity (200 km/s) and distance (261 kpc), we show that it is extremely unlikely to be unbound if Galactic satellites are associated with dark matter substructure, as 99.9% of subhalos in the simulations are bound to their host. The observed position and velocity of Leo I strongly disfavor a low mass Milky Way: if we assume that Leo I is the least bound of the Milky Way's classical satellites, then we find that M_MW > 10^{12} M_sun at 95% confidence for a variety of Bayesian priors on M_MW. In lower mass halos, it is vanishingly rare to find subhalos at 261 kpc moving as fast as Leo I. Should an additional classical satellite be found to be less bound than Leo I, this lower limit on M_MW would increase by 30%. Imposing a mass weighted LCDM prior, we find a median Milky Way virial mass of M_MW=1.6 x 10^{12} M_sun, with a 90% confidence interval of [1.0-2.4] x 10^{12} M_sun. We also confirm a strong correlation between subhalo infall time and orbital energy in the simulations and show that proper motions can aid significantly in interpreting the infall times and orbital histories of satellites.
|
[
{
"name": "Michael Boylan-Kolchin",
"orcid": null
},
{
"name": "James S. Bullock",
"orcid": null
},
{
"name": "Sangmo Tony Sohn",
"orcid": null
},
{
"name": "Gurtina Besla",
"orcid": null
},
{
"name": "Roeland P. van der Marel",
"orcid": null
}
] |
[
"astro-ph.CO"
] |
astro-ph.CO
|
Other
|
2013-04-23
|
2014-02-17
|
10.1088/0004-637X/768/2/140
|
Astrophys.J. 768:140 (2013)
|
12 pages, 7 figures; ApJ, in press. Version 2: clarifications and additional discussion; conclusions unchanged
|
arXiv License
|
XML-ArXiv-OAI
|
We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of Galaxy-size dark matter halos in existence to constrain the mass of the Milky Way's dark matter halo (M_MW). Despite Leo I's large Galacto-centric space velocity (200 km/s) and distance (261 kpc), we show that it is extremely unlikely to be unbound if Galactic satellites are associated with dark matter substructure, as 99.9% of subhalos in the simulations are bound to their host. The observed position and velocity of Leo I strongly disfavor a low mass Milky Way: if we assume that Leo I is the least bound of the Milky Way's classical satellites, then we find that M_MW > 10^{12} M_sun at 95% confidence for a variety of Bayesian priors on M_MW. In lower mass halos, it is vanishingly rare to find subhalos at 261 kpc moving as fast as Leo I. Should an additional classical satellite be found to be less bound than Leo I, this lower limit on M_MW would increase by 30%. Imposing a mass weighted LCDM prior, we find a median Milky Way virial mass of M_MW=1.6 x 10^{12} M_sun, with a 90% confidence interval of [1.0-2.4] x 10^{12} M_sun. We also confirm a strong correlation between subhalo infall time and orbital energy in the simulations and show that proper motions can aid significantly in interpreting the infall times and orbital histories of satellites.
|
[
"We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of Galaxy-size dark matter halos in existence to constrain the mass of the Milky Way's dark matter halo (M_MW)",
"Despite Leo I's large Galacto-centric space velocity (200 km/s) and distance (261 kpc), we show that it is extremely unlikely to be unbound if Galactic satellites are associated with dark matter substructure, as 99",
"9% of subhalos in the simulations are bound to their host",
"The observed position and velocity of Leo I strongly disfavor a low mass Milky Way: if we assume that Leo I is the least bound of the Milky Way's classical satellites, then we find that M_MW > 10^{12} M_sun at 95% confidence for a variety of Bayesian priors on M_MW",
"In lower mass halos, it is vanishingly rare to find subhalos at 261 kpc moving as fast as Leo I",
"Should an additional classical satellite be found to be less bound than Leo I, this lower limit on M_MW would increase by 30%",
"Imposing a mass weighted LCDM prior, we find a median Milky Way virial mass of M_MW=1",
"6 x 10^{12} M_sun, with a 90% confidence interval of [1",
"We also confirm a strong correlation between subhalo infall time and orbital energy in the simulations and show that proper motions can aid significantly in interpreting the infall times and orbital histories of satellites"
] | 9
|
[] | 0
| false
|
[] |
[] | 322
|
Title: The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo
Categories: astro-ph.CO
Abstract: We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of Galaxy-size dark matter halos in existence to constrain the mass of the Milky Way's dark matter halo (M_MW). Despite Leo I's large Galacto-centric space velocity (200 km/s) and distance (261 kpc), we show that it is extremely unlikely to be unbound if Galactic satellites are associated with dark matter substructure, as 99.9% of subhalos in the simulations are bound to their host. The observed position and velocity of Leo I strongly disfavor a low mass Milky Way: if we assume that Leo I is the least bound of the Milky Way's classical satellites, then we find that M_MW > 10^{12} M_sun at 95% confidence for a variety of Bayesian priors on M_MW. In lower mass halos, it is vanishingly rare to find subhalos at 261 kpc moving as fast as Leo I. Should an additional classical satellite be found to be less bound than Leo I, this lower limit on M_MW would increase by 30%. Imposing a mass weighted LCDM prior, we find a median Milky Way virial mass of M_MW=1.6 x 10^{12} M_sun, with a 90% confidence interval of [1.0-2.4] x 10^{12} M_sun. We also confirm a strong correlation between subhalo infall time and orbital energy in the simulations and show that proper motions can aid significantly in interpreting the infall times and orbital histories of satellites.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1502.02829
| 1
|
Ultrafast dynamic conductivity and scattering rate saturation of photoexcited charge carriers in silicon investigated with a midinfrared continuum probe
|
We employ ultra-broadband terahertz-midinfrared probe pulses to characterize the optical response of photoinduced charge-carrier plasmas in high-resistivity silicon in a reflection geometry, over a wide range of excitation densities (10^{15}-10^{19} cm^{-3}) at room temperature. In contrast to conventional terahertz spectroscopy studies, this enables one to directly cover the frequency range encompassing the resultant plasma frequencies. The intensity reflection spectra of the thermalized plasma, measured using sum-frequency (up-conversion) detection of the probe pulses, can be modeled well by a standard Drude model with a density-dependent momentum scattering time of approx. 200 fs at low densities, reaching approx. 20 fs for densities of approx. 10^{19} cm^{-3}, where the increase of the scattering rate saturates. This behavior can be reproduced well with theoretical results based on the generalized Drude approach for the electron-hole scattering rate, where the saturation occurs due to phase-space restrictions as the plasma becomes degenerate. We also study the initial sub-picosecond temporal development of the Drude response, and discuss the observed rise in the scattering time in terms of initial charge-carrier relaxation, as well as the optical response of the photoexcited sample as predicted by finite-difference time-domain simulations.
|
[
{
"name": "Fanqi Meng",
"orcid": null
},
{
"name": "Mark D. Thomson",
"orcid": null
},
{
"name": "Bo E. Sernelius",
"orcid": null
},
{
"name": "Michael Jörger",
"orcid": null
},
{
"name": "Hartmut G. Roskos",
"orcid": null
}
] |
[
"cond-mat.mtrl-sci"
] |
cond-mat.mtrl-sci
|
Other
|
2015-02-10
|
2015-02-11
|
10.1103/PhysRevB.91.075201
|
Physical Review B 91, 075201 (2015)
|
9 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We employ ultra-broadband terahertz-midinfrared probe pulses to characterize the optical response of photoinduced charge-carrier plasmas in high-resistivity silicon in a reflection geometry, over a wide range of excitation densities (10^{15}-10^{19} cm^{-3}) at room temperature. In contrast to conventional terahertz spectroscopy studies, this enables one to directly cover the frequency range encompassing the resultant plasma frequencies. The intensity reflection spectra of the thermalized plasma, measured using sum-frequency (up-conversion) detection of the probe pulses, can be modeled well by a standard Drude model with a density-dependent momentum scattering time of approx. 200 fs at low densities, reaching approx. 20 fs for densities of approx. 10^{19} cm^{-3}, where the increase of the scattering rate saturates. This behavior can be reproduced well with theoretical results based on the generalized Drude approach for the electron-hole scattering rate, where the saturation occurs due to phase-space restrictions as the plasma becomes degenerate. We also study the initial sub-picosecond temporal development of the Drude response, and discuss the observed rise in the scattering time in terms of initial charge-carrier relaxation, as well as the optical response of the photoexcited sample as predicted by finite-difference time-domain simulations.
|
[
"We employ ultra-broadband terahertz-midinfrared probe pulses to characterize the optical response of photoinduced charge-carrier plasmas in high-resistivity silicon in a reflection geometry, over a wide range of excitation densities (10^{15}-10^{19} cm^{-3}) at room temperature",
"In contrast to conventional terahertz spectroscopy studies, this enables one to directly cover the frequency range encompassing the resultant plasma frequencies",
"The intensity reflection spectra of the thermalized plasma, measured using sum-frequency (up-conversion) detection of the probe pulses, can be modeled well by a standard Drude model with a density-dependent momentum scattering time of approx",
"200 fs at low densities, reaching approx",
"20 fs for densities of approx",
"10^{19} cm^{-3}, where the increase of the scattering rate saturates",
"This behavior can be reproduced well with theoretical results based on the generalized Drude approach for the electron-hole scattering rate, where the saturation occurs due to phase-space restrictions as the plasma becomes degenerate",
"We also study the initial sub-picosecond temporal development of the Drude response, and discuss the observed rise in the scattering time in terms of initial charge-carrier relaxation, as well as the optical response of the photoexcited sample as predicted by finite-difference time-domain simulations"
] | 8
|
[] | 0
| false
|
[] |
[] | 244
|
Title: Ultrafast dynamic conductivity and scattering rate saturation of photoexcited charge carriers in silicon investigated with a midinfrared continuum probe
Categories: cond-mat.mtrl-sci
Abstract: We employ ultra-broadband terahertz-midinfrared probe pulses to characterize the optical response of photoinduced charge-carrier plasmas in high-resistivity silicon in a reflection geometry, over a wide range of excitation densities (10^{15}-10^{19} cm^{-3}) at room temperature. In contrast to conventional terahertz spectroscopy studies, this enables one to directly cover the frequency range encompassing the resultant plasma frequencies. The intensity reflection spectra of the thermalized plasma, measured using sum-frequency (up-conversion) detection of the probe pulses, can be modeled well by a standard Drude model with a density-dependent momentum scattering time of approx. 200 fs at low densities, reaching approx. 20 fs for densities of approx. 10^{19} cm^{-3}, where the increase of the scattering rate saturates. This behavior can be reproduced well with theoretical results based on the generalized Drude approach for the electron-hole scattering rate, where the saturation occurs due to phase-space restrictions as the plasma becomes degenerate. We also study the initial sub-picosecond temporal development of the Drude response, and discuss the observed rise in the scattering time in terms of initial charge-carrier relaxation, as well as the optical response of the photoexcited sample as predicted by finite-difference time-domain simulations.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1102.2111
| 1
|
Relative stability of $6H$-SiC$\{0001\}$ surface terminations and formation of graphene overlayers by Si evaporation
|
We present density functional theory (DFT) calculations for 6H-SiC surfaces with different surface stackings and terminations. We compare the relative stability of different and surfaces in terms of their surface free energies. Removing surface and subsurface Si atoms, we simulate the formation of graphene and graphene-like overlayers by Si evaporation. We find that overlayers with a different nature of bonding are preferred at the two non-equivalent surface orientations. At , a chemically bonded, highly strained and buckled film is predicted. At , a van der Waals (vdW) bonded overlayer is preferred. We quantify the vdW binding and show that it can have a doping effect on electron behavior in the overlayer.
|
[
{
"name": "Jochen Rohrer",
"orcid": null
},
{
"name": "Eleni Ziambaras",
"orcid": null
},
{
"name": "Per Hyldgaard",
"orcid": null
}
] |
[
"cond-mat.mtrl-sci"
] |
cond-mat.mtrl-sci
|
Other
|
2011-02-10
|
2011-02-11
| null | null |
12 pages, 7 figures, submitted to PRB
|
arXiv License
|
XML-ArXiv-OAI
|
We present density functional theory (DFT) calculations for 6H-SiC surfaces with different surface stackings and terminations. We compare the relative stability of different and surfaces in terms of their surface free energies. Removing surface and subsurface Si atoms, we simulate the formation of graphene and graphene-like overlayers by Si evaporation. We find that overlayers with a different nature of bonding are preferred at the two non-equivalent surface orientations. At , a chemically bonded, highly strained and buckled film is predicted. At , a van der Waals (vdW) bonded overlayer is preferred. We quantify the vdW binding and show that it can have a doping effect on electron behavior in the overlayer.
|
[
"We present density functional theory (DFT) calculations for 6H-SiC surfaces with different surface stackings and terminations",
"We compare the relative stability of different and surfaces in terms of their surface free energies",
"Removing surface and subsurface Si atoms, we simulate the formation of graphene and graphene-like overlayers by Si evaporation",
"We find that overlayers with a different nature of bonding are preferred at the two non-equivalent surface orientations",
"At , a chemically bonded, highly strained and buckled film is predicted",
"At , a van der Waals (vdW) bonded overlayer is preferred",
"We quantify the vdW binding and show that it can have a doping effect on electron behavior in the overlayer"
] | 7
|
[
"\\{0001\\}",
"(0001)",
"(000\\bar1)",
"(0001)",
"(000\\bar1)"
] | 5
| true
|
[] |
[] | 144
|
Title: Relative stability of $6H$-SiC$\{0001\}$ surface terminations and formation of graphene overlayers by Si evaporation
Categories: cond-mat.mtrl-sci
Abstract: We present density functional theory (DFT) calculations for 6H-SiC surfaces with different surface stackings and terminations. We compare the relative stability of different and surfaces in terms of their surface free energies. Removing surface and subsurface Si atoms, we simulate the formation of graphene and graphene-like overlayers by Si evaporation. We find that overlayers with a different nature of bonding are preferred at the two non-equivalent surface orientations. At , a chemically bonded, highly strained and buckled film is predicted. At , a van der Waals (vdW) bonded overlayer is preferred. We quantify the vdW binding and show that it can have a doping effect on electron behavior in the overlayer.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0901.1029
| 1
|
Hydrogen adsorption on hexagonal silicon nanotubes
|
We present a first-principles study of geometrical structure and energetics of hydrogen adsorbed on hexagonal single-walled silicon nanotubes (SiNTs). The adsorption behaviors of hydrogen molecules in SiNTs are investigated. The binding energies for the most stable physisorbed configurations are calculated to be less than 0.1 eV. The energy barriers are also investigated for dissociation of H2 molecules. Finally, we consider encapsulation of H2 molecules in SiNTs. The possibility of SiNTs as hydrogen storage materials is discussed.
|
[
{
"name": "Junga Ryou",
"orcid": null
},
{
"name": "Suklyun Hong",
"orcid": null
},
{
"name": "Gunn Kim",
"orcid": null
}
] |
[
"cond-mat.mtrl-sci"
] |
cond-mat.mtrl-sci
|
Other
|
2009-01-08
|
2009-12-01
| null |
Solid State Communications 148, 469 (2008)
| null |
arXiv License
|
XML-ArXiv-OAI
|
We present a first-principles study of geometrical structure and energetics of hydrogen adsorbed on hexagonal single-walled silicon nanotubes (SiNTs). The adsorption behaviors of hydrogen molecules in SiNTs are investigated. The binding energies for the most stable physisorbed configurations are calculated to be less than 0.1 eV. The energy barriers are also investigated for dissociation of H2 molecules. Finally, we consider encapsulation of H2 molecules in SiNTs. The possibility of SiNTs as hydrogen storage materials is discussed.
|
[
"We present a first-principles study of geometrical structure and energetics of hydrogen adsorbed on hexagonal single-walled silicon nanotubes (SiNTs)",
"The adsorption behaviors of hydrogen molecules in SiNTs are investigated",
"The binding energies for the most stable physisorbed configurations are calculated to be less than 0",
"The energy barriers are also investigated for dissociation of H2 molecules",
"Finally, we consider encapsulation of H2 molecules in SiNTs",
"The possibility of SiNTs as hydrogen storage materials is discussed"
] | 6
|
[] | 0
| false
|
[] |
[] | 98
|
Title: Hydrogen adsorption on hexagonal silicon nanotubes
Categories: cond-mat.mtrl-sci
Abstract: We present a first-principles study of geometrical structure and energetics of hydrogen adsorbed on hexagonal single-walled silicon nanotubes (SiNTs). The adsorption behaviors of hydrogen molecules in SiNTs are investigated. The binding energies for the most stable physisorbed configurations are calculated to be less than 0.1 eV. The energy barriers are also investigated for dissociation of H2 molecules. Finally, we consider encapsulation of H2 molecules in SiNTs. The possibility of SiNTs as hydrogen storage materials is discussed.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1304.7784
| 1
|
Instabilities at planetary gap edges in 3D self-gravitating disks
|
Numerical simulations are presented to study the stability of gaps opened by giant planets in 3D self-gravitating disks. In weakly self-gravitating disks, a few vortices develop at the gap edge and merge on orbital time-scales. The result is one large but weak vortex with Rossby number -0.01. In moderately self-gravitating disks, more vortices develop and their merging is resisted on dynamical time-scales. Self-gravity can sustain multi-vortex configurations, with Rossby number -0.2 to -0.1, over a time-scale of order 100 orbits. Self-gravity also enhances the vortex vertical density stratification, even in disks with initial Toomre parameter of order 10. However, vortex formation is suppressed in strongly self-gravitating disks and replaced by a global spiral instability associated with the gap edge which develops during gap formation.
|
[
{
"name": "Min-Kai Lin",
"orcid": null
}
] |
[
"astro-ph.EP"
] |
astro-ph.EP
|
Other
|
2013-04-29
|
2013-05-01
|
10.1051/epjconf/20134607001
|
EPJ Web of Conferences, Volume 46, 2013
|
Proceeding for `Instabilities and Structures in Proto-Planetary Disks' workshop. Includes additional results analysis of Lin (2012, arXiv:1205.4034) and an additional simulation. Talk pdf available at http://cita.utoronto.ca/~mklin924/talks.html
|
arXiv License
|
XML-ArXiv-OAI
|
Numerical simulations are presented to study the stability of gaps opened by giant planets in 3D self-gravitating disks. In weakly self-gravitating disks, a few vortices develop at the gap edge and merge on orbital time-scales. The result is one large but weak vortex with Rossby number -0.01. In moderately self-gravitating disks, more vortices develop and their merging is resisted on dynamical time-scales. Self-gravity can sustain multi-vortex configurations, with Rossby number -0.2 to -0.1, over a time-scale of order 100 orbits. Self-gravity also enhances the vortex vertical density stratification, even in disks with initial Toomre parameter of order 10. However, vortex formation is suppressed in strongly self-gravitating disks and replaced by a global spiral instability associated with the gap edge which develops during gap formation.
|
[
"Numerical simulations are presented to study the stability of gaps opened by giant planets in 3D self-gravitating disks",
"In weakly self-gravitating disks, a few vortices develop at the gap edge and merge on orbital time-scales",
"The result is one large but weak vortex with Rossby number -0",
"In moderately self-gravitating disks, more vortices develop and their merging is resisted on dynamical time-scales",
"Self-gravity can sustain multi-vortex configurations, with Rossby number -0",
"1, over a time-scale of order 100 orbits",
"Self-gravity also enhances the vortex vertical density stratification, even in disks with initial Toomre parameter of order 10",
"However, vortex formation is suppressed in strongly self-gravitating disks and replaced by a global spiral instability associated with the gap edge which develops during gap formation"
] | 8
|
[] | 0
| false
|
[] |
[] | 161
|
Title: Instabilities at planetary gap edges in 3D self-gravitating disks
Categories: astro-ph.EP
Abstract: Numerical simulations are presented to study the stability of gaps opened by giant planets in 3D self-gravitating disks. In weakly self-gravitating disks, a few vortices develop at the gap edge and merge on orbital time-scales. The result is one large but weak vortex with Rossby number -0.01. In moderately self-gravitating disks, more vortices develop and their merging is resisted on dynamical time-scales. Self-gravity can sustain multi-vortex configurations, with Rossby number -0.2 to -0.1, over a time-scale of order 100 orbits. Self-gravity also enhances the vortex vertical density stratification, even in disks with initial Toomre parameter of order 10. However, vortex formation is suppressed in strongly self-gravitating disks and replaced by a global spiral instability associated with the gap edge which develops during gap formation.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1301.2755
| 1
|
Precise Measurement of a Magnetic Field Generated by the Electromagnetic Flux Compression Technique
|
The precision of the values of a magnetic field generated by electromagnetic flux compression was investigated in ultra-high magnetic fields of up to 700 T. In an attempt to calibrate the magnetic field measured by pickup coils, precise Faraday rotation (FR) measurements were conducted on optical (quartz and crown) glasses. A discernible "turn-around" phenomenon was observed in the FR signal as well as the pickup coils before the end of a liner implosion. We found that the magnetic field measured by pickup coils should be corrected by taking into account the high-frequency response of the signal transmission line. Near the peak magnetic field, however, the pickup coils failed to provide reliable values, leaving the FR measurement as the only method to precisely measure an extremely high magnetic fields.
|
[
{
"name": "D. Nakamura",
"orcid": null
},
{
"name": "H. Sawabe",
"orcid": null
},
{
"name": "Y. H. Matsuda",
"orcid": null
},
{
"name": "S. Takeyama",
"orcid": null
}
] |
[
"physics.ins-det"
] |
physics.ins-det
|
Physics
|
2013-01-13
|
2013-09-05
|
10.1063/1.4798543
|
Rev. Sci. Instrum. 84, 044702 (2013)
|
11 pages, 14 figures
|
arXiv License
|
XML-ArXiv-OAI
|
The precision of the values of a magnetic field generated by electromagnetic flux compression was investigated in ultra-high magnetic fields of up to 700 T. In an attempt to calibrate the magnetic field measured by pickup coils, precise Faraday rotation (FR) measurements were conducted on optical (quartz and crown) glasses. A discernible "turn-around" phenomenon was observed in the FR signal as well as the pickup coils before the end of a liner implosion. We found that the magnetic field measured by pickup coils should be corrected by taking into account the high-frequency response of the signal transmission line. Near the peak magnetic field, however, the pickup coils failed to provide reliable values, leaving the FR measurement as the only method to precisely measure an extremely high magnetic fields.
|
[
"The precision of the values of a magnetic field generated by electromagnetic flux compression was investigated in ultra-high magnetic fields of up to 700 T",
"In an attempt to calibrate the magnetic field measured by pickup coils, precise Faraday rotation (FR) measurements were conducted on optical (quartz and crown) glasses",
"A discernible \"turn-around\" phenomenon was observed in the FR signal as well as the pickup coils before the end of a liner implosion",
"We found that the magnetic field measured by pickup coils should be corrected by taking into account the high-frequency response of the signal transmission line",
"Near the peak magnetic field, however, the pickup coils failed to provide reliable values, leaving the FR measurement as the only method to precisely measure an extremely high magnetic fields"
] | 5
|
[] | 0
| false
|
[] |
[] | 166
|
Title: Precise Measurement of a Magnetic Field Generated by the Electromagnetic Flux Compression Technique
Categories: physics.ins-det
Abstract: The precision of the values of a magnetic field generated by electromagnetic flux compression was investigated in ultra-high magnetic fields of up to 700 T. In an attempt to calibrate the magnetic field measured by pickup coils, precise Faraday rotation (FR) measurements were conducted on optical (quartz and crown) glasses. A discernible "turn-around" phenomenon was observed in the FR signal as well as the pickup coils before the end of a liner implosion. We found that the magnetic field measured by pickup coils should be corrected by taking into account the high-frequency response of the signal transmission line. Near the peak magnetic field, however, the pickup coils failed to provide reliable values, leaving the FR measurement as the only method to precisely measure an extremely high magnetic fields.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1509.08921
| 1
|
Compositional and in Vitro Evaluation of Nonwoven Type I Collagen/Poly-dl-lactic Acid Scaffolds for Bone Regeneration
|
Poly-dl-lactic acid (PDLLA) was blended with type I collagen to attempt to overcome the instantaneous gelation of electrospun collagen scaffolds in biological environments. Scaffolds based on blends of type I collagen and PDLLA were investigated for material stability in cell culture conditions (37 °C; 5% CO2) in which post-electrospinning glutaraldehyde crosslinking was also applied. The resulting wet-stable webs were cultured with bone marrow stromal cells (HBMSC) for five weeks. Scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Fourier transform infra-red spectroscopy (FTIR) and biochemical assays were used to characterise the scaffolds and the consequent cell-scaffold constructs. To investigate any electrospinning-induced denaturation of collagen, identical PDLLA/collagen and PDLLA/gelatine blends were electrospun and their potential to promote osteogenic differentiation investigated. PDLLA/collagen blends with w/w ratios of 40/60, 60/40 and 80/20 resulted in satisfactory wet stabilities in a humid environment, although chemical crosslinking was essential to ensure long term material cell culture. Scaffolds of PDLLA/collagen at a 60:40 weight ratio provided the greatest stability over a five-week culture period. The PDLLA/collagen scaffolds promoted greater cell proliferation and osteogenic differentiation compared to HMBSCs seeded on the corresponding PDLLA/gelatine scaffolds, suggesting that any electrospinning-induced collagen denaturation did not affect material biofunctionality within 5 weeks in vitro.
|
[
{
"name": "Xiangchen Qiao",
"orcid": null
},
{
"name": "Stephen J. Russell",
"orcid": null
},
{
"name": "Xuebin Yang",
"orcid": null
},
{
"name": "Giuseppe Tronci",
"orcid": null
},
{
"name": "David J. Wood",
"orcid": null
}
] |
[
"physics.bio-ph",
"q-bio.TO"
] |
physics.bio-ph
|
Physics
|
2015-09-06
|
2015-10-01
|
10.3390/jfb6030667
|
Journal of Functional Biomaterials 2015, 6, 667-686
|
20 pages, 7 figures, 1 table
|
arXiv License
|
XML-ArXiv-OAI
|
Poly-dl-lactic acid (PDLLA) was blended with type I collagen to attempt to overcome the instantaneous gelation of electrospun collagen scaffolds in biological environments. Scaffolds based on blends of type I collagen and PDLLA were investigated for material stability in cell culture conditions (37 °C; 5% CO2) in which post-electrospinning glutaraldehyde crosslinking was also applied. The resulting wet-stable webs were cultured with bone marrow stromal cells (HBMSC) for five weeks. Scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Fourier transform infra-red spectroscopy (FTIR) and biochemical assays were used to characterise the scaffolds and the consequent cell-scaffold constructs. To investigate any electrospinning-induced denaturation of collagen, identical PDLLA/collagen and PDLLA/gelatine blends were electrospun and their potential to promote osteogenic differentiation investigated. PDLLA/collagen blends with w/w ratios of 40/60, 60/40 and 80/20 resulted in satisfactory wet stabilities in a humid environment, although chemical crosslinking was essential to ensure long term material cell culture. Scaffolds of PDLLA/collagen at a 60:40 weight ratio provided the greatest stability over a five-week culture period. The PDLLA/collagen scaffolds promoted greater cell proliferation and osteogenic differentiation compared to HMBSCs seeded on the corresponding PDLLA/gelatine scaffolds, suggesting that any electrospinning-induced collagen denaturation did not affect material biofunctionality within 5 weeks in vitro.
|
[
"Poly-dl-lactic acid (PDLLA) was blended with type I collagen to attempt to overcome the instantaneous gelation of electrospun collagen scaffolds in biological environments",
"Scaffolds based on blends of type I collagen and PDLLA were investigated for material stability in cell culture conditions (37 °C; 5% CO2) in which post-electrospinning glutaraldehyde crosslinking was also applied",
"The resulting wet-stable webs were cultured with bone marrow stromal cells (HBMSC) for five weeks",
"Scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Fourier transform infra-red spectroscopy (FTIR) and biochemical assays were used to characterise the scaffolds and the consequent cell-scaffold constructs",
"To investigate any electrospinning-induced denaturation of collagen, identical PDLLA/collagen and PDLLA/gelatine blends were electrospun and their potential to promote osteogenic differentiation investigated",
"PDLLA/collagen blends with w/w ratios of 40/60, 60/40 and 80/20 resulted in satisfactory wet stabilities in a humid environment, although chemical crosslinking was essential to ensure long term material cell culture",
"Scaffolds of PDLLA/collagen at a 60:40 weight ratio provided the greatest stability over a five-week culture period",
"The PDLLA/collagen scaffolds promoted greater cell proliferation and osteogenic differentiation compared to HMBSCs seeded on the corresponding PDLLA/gelatine scaffolds, suggesting that any electrospinning-induced collagen denaturation did not affect material biofunctionality within 5 weeks in vitro"
] | 8
|
[] | 0
| false
|
[] |
[] | 262
|
Title: Compositional and in Vitro Evaluation of Nonwoven Type I Collagen/Poly-dl-lactic Acid Scaffolds for Bone Regeneration
Categories: physics.bio-ph, q-bio.TO
Abstract: Poly-dl-lactic acid (PDLLA) was blended with type I collagen to attempt to overcome the instantaneous gelation of electrospun collagen scaffolds in biological environments. Scaffolds based on blends of type I collagen and PDLLA were investigated for material stability in cell culture conditions (37 °C; 5% CO2) in which post-electrospinning glutaraldehyde crosslinking was also applied. The resulting wet-stable webs were cultured with bone marrow stromal cells (HBMSC) for five weeks. Scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Fourier transform infra-red spectroscopy (FTIR) and biochemical assays were used to characterise the scaffolds and the consequent cell-scaffold constructs. To investigate any electrospinning-induced denaturation of collagen, identical PDLLA/collagen and PDLLA/gelatine blends were electrospun and their potential to promote osteogenic differentiation investigated. PDLLA/collagen blends with w/w ratios of 40/60, 60/40 and 80/20 resulted in satisfactory wet stabilities in a humid environment, although chemical crosslinking was essential to ensure long term material cell culture. Scaffolds of PDLLA/collagen at a 60:40 weight ratio provided the greatest stability over a five-week culture period. The PDLLA/collagen scaffolds promoted greater cell proliferation and osteogenic differentiation compared to HMBSCs seeded on the corresponding PDLLA/gelatine scaffolds, suggesting that any electrospinning-induced collagen denaturation did not affect material biofunctionality within 5 weeks in vitro.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0002358
| 1
|
Photometric Properties of Low Redshift Galaxy Clusters
|
We have recently completed a comprehensive photometric survey of 27 Abell clusters with the 8k mosaic camera on the KPNO 0.9m telescope. Preliminary luminosity functions and dwarf-to-giant galaxy ratios have been calculated for five galaxy clusters (A1185, A1656, A2151, A2152, and A2197). A significant increase in the faint end slope between the inner (0.0-0.75 Mpc) and outer (0.75-1.50 Mpc) luminosity function is measured for A2151 (H_o = 50 km/s/Mpc). All five clusters show a significant dip in the luminosity function at M_R = -19.5.
|
[
{
"name": "W. A. Barkhouse",
"orcid": null
},
{
"name": "H. K. C. Yee",
"orcid": null
},
{
"name": "O. Lopez-Cruz",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2000-02-17
|
2009-12-01
| null | null |
1 page. To appear in "Cosmic Evolution and Galaxy Formation: Structure, Interactions and Feedback", Eds. J.Franco, E.Terlevich, O.Lopez-Cruz, I.Aretxaga, ASP Conf. Series
|
arXiv License
|
XML-ArXiv-OAI
|
We have recently completed a comprehensive photometric survey of 27 Abell clusters with the 8k mosaic camera on the KPNO 0.9m telescope. Preliminary luminosity functions and dwarf-to-giant galaxy ratios have been calculated for five galaxy clusters (A1185, A1656, A2151, A2152, and A2197). A significant increase in the faint end slope between the inner (0.0-0.75 Mpc) and outer (0.75-1.50 Mpc) luminosity function is measured for A2151 (H_o = 50 km/s/Mpc). All five clusters show a significant dip in the luminosity function at M_R = -19.5.
|
[
"We have recently completed a comprehensive photometric survey of 27 Abell clusters with the 8k mosaic camera on the KPNO 0",
"Preliminary luminosity functions and dwarf-to-giant galaxy ratios have been calculated for five galaxy clusters (A1185, A1656, A2151, A2152, and A2197)",
"A significant increase in the faint end slope between the inner (0",
"50 Mpc) luminosity function is measured for A2151 (H_o = 50 km/s/Mpc)",
"All five clusters show a significant dip in the luminosity function at M_R = -19"
] | 5
|
[] | 0
| false
|
[] |
[] | 109
|
Title: Photometric Properties of Low Redshift Galaxy Clusters
Categories: astro-ph
Abstract: We have recently completed a comprehensive photometric survey of 27 Abell clusters with the 8k mosaic camera on the KPNO 0.9m telescope. Preliminary luminosity functions and dwarf-to-giant galaxy ratios have been calculated for five galaxy clusters (A1185, A1656, A2151, A2152, and A2197). A significant increase in the faint end slope between the inner (0.0-0.75 Mpc) and outer (0.75-1.50 Mpc) luminosity function is measured for A2151 (H_o = 50 km/s/Mpc). All five clusters show a significant dip in the luminosity function at M_R = -19.5.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1010.3995
| 1
|
An iterative approach for amplitude amplification with nonorthogonal measurements
|
Using three coupled harmonic oscillators, we present an amplitude-amplification method for factorization of an integer. We generalize the method in [arXiv:1007.4338] by employing non-orthogonal measurements on the harmonic oscillator. This method can increase the probability of obtaining the factors by repeatedly using the nonlinear interactions between the oscillators and non-orthogonal measurements. However, this approach requires an exponential amount of resources for implementation. Thus, this method cannot provide a speed-up over classical algorithms unless its limitations are resolved.
|
[
{
"name": "H. T. Ng",
"orcid": null
},
{
"name": "Franco Nori",
"orcid": null
}
] |
[
"quant-ph",
"cs.DS",
"math.NA"
] |
quant-ph
|
Other
|
2012-08-06
|
2012-08-07
| null | null |
21 pages, 5 figures; title changed, major revisions
|
arXiv License
|
XML-ArXiv-OAI
|
Using three coupled harmonic oscillators, we present an amplitude-amplification method for factorization of an integer. We generalize the method in [arXiv:1007.4338] by employing non-orthogonal measurements on the harmonic oscillator. This method can increase the probability of obtaining the factors by repeatedly using the nonlinear interactions between the oscillators and non-orthogonal measurements. However, this approach requires an exponential amount of resources for implementation. Thus, this method cannot provide a speed-up over classical algorithms unless its limitations are resolved.
|
[
"Using three coupled harmonic oscillators, we present an amplitude-amplification method for factorization of an integer",
"We generalize the method in [arXiv:1007",
"4338] by employing non-orthogonal measurements on the harmonic oscillator",
"This method can increase the probability of obtaining the factors by repeatedly using the nonlinear interactions between the oscillators and non-orthogonal measurements",
"However, this approach requires an exponential amount of resources for implementation",
"Thus, this method cannot provide a speed-up over classical algorithms unless its limitations are resolved"
] | 6
|
[] | 0
| false
|
[] |
[] | 100
|
Title: An iterative approach for amplitude amplification with nonorthogonal measurements
Categories: quant-ph, cs.DS, math.NA
Abstract: Using three coupled harmonic oscillators, we present an amplitude-amplification method for factorization of an integer. We generalize the method in [arXiv:1007.4338] by employing non-orthogonal measurements on the harmonic oscillator. This method can increase the probability of obtaining the factors by repeatedly using the nonlinear interactions between the oscillators and non-orthogonal measurements. However, this approach requires an exponential amount of resources for implementation. Thus, this method cannot provide a speed-up over classical algorithms unless its limitations are resolved.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1206.5776
| 1
|
Iterated function systems with a given continuous stationary distribution
|
For any continuous probability measure on we construct an IFS with probabilities having as its unique measure-attractor.
|
[
{
"name": "Örjan Stenflo",
"orcid": null
}
] |
[
"math.PR"
] |
math.PR
|
Mathematics
|
2012-06-25
|
2015-06-03
|
10.1142/S0218348X1250017X
|
Fractals, 20, no 03n04, (2012), 197--202
|
7 pages, 3 figures
|
arXiv License
|
XML-ArXiv-OAI
|
For any continuous probability measure on we construct an IFS with probabilities having as its unique measure-attractor.
|
[
"For any continuous probability measure on we construct an IFS with probabilities having as its unique measure-attractor"
] | 1
|
[
"μ",
"{\\mathbb R}",
"μ"
] | 3
| true
|
[] |
[] | 22
|
Title: Iterated function systems with a given continuous stationary distribution
Categories: math.PR
Abstract: For any continuous probability measure on we construct an IFS with probabilities having as its unique measure-attractor.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ex/0101001
| 1
|
Linear Collider Workshop 2000 Summary
|
We summarize some of the main physics questions that will serve to define the linear e+e- collider program, and comment on issues that confront the world community in making such a collider a reality.
|
[
{
"name": "P. D. Grannis",
"orcid": null
}
] |
[
"hep-ex"
] |
hep-ex
|
Other
|
2001-01-04
|
2009-11-30
|
10.1063/1.1394308
| null |
16 pp, Summary of Linear Collider Workshop, FNAL Oct. 2000
|
arXiv License
|
XML-ArXiv-OAI
|
We summarize some of the main physics questions that will serve to define the linear e+e- collider program, and comment on issues that confront the world community in making such a collider a reality.
|
[
"We summarize some of the main physics questions that will serve to define the linear e+e- collider program, and comment on issues that confront the world community in making such a collider a reality"
] | 1
|
[] | 0
| false
|
[] |
[] | 44
|
Title: Linear Collider Workshop 2000 Summary
Categories: hep-ex
Abstract: We summarize some of the main physics questions that will serve to define the linear e+e- collider program, and comment on issues that confront the world community in making such a collider a reality.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1306.3609
| 1
|
Volume Ratio, Sparsity, and Minimaxity under Unitarily Invariant Norms
|
The current paper presents a novel machinery for studying non-asymptotic minimax estimation of high-dimensional matrices, which yields tight minimax rates for a large collection of loss functions in a variety of problems. Based on the convex geometry of finite-dimensional Banach spaces, we first develop a volume ratio approach for determining minimax estimation rates of unconstrained normal mean matrices under all squared unitarily invariant norm losses. In addition, we establish the minimax rates for estimating mean matrices with submatrix sparsity, where the sparsity constraint introduces an additional term in the rate whose dependence on the norm differs completely from the rate of the unconstrained problem. Moreover, the approach is applicable to the matrix completion problem under the low-rank constraint. The new method also extends beyond the normal mean model. In particular, it yields tight rates in covariance matrix estimation and Poisson rate matrix estimation problems for all unitarily invariant norms.
|
[
{
"name": "Zongming Ma",
"orcid": null
},
{
"name": "Yihong Wu",
"orcid": null
}
] |
[
"math.ST",
"cs.IT",
"math.IT",
"stat.TH"
] |
math.ST
|
Mathematics
|
2013-06-15
|
2013-06-18
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
The current paper presents a novel machinery for studying non-asymptotic minimax estimation of high-dimensional matrices, which yields tight minimax rates for a large collection of loss functions in a variety of problems. Based on the convex geometry of finite-dimensional Banach spaces, we first develop a volume ratio approach for determining minimax estimation rates of unconstrained normal mean matrices under all squared unitarily invariant norm losses. In addition, we establish the minimax rates for estimating mean matrices with submatrix sparsity, where the sparsity constraint introduces an additional term in the rate whose dependence on the norm differs completely from the rate of the unconstrained problem. Moreover, the approach is applicable to the matrix completion problem under the low-rank constraint. The new method also extends beyond the normal mean model. In particular, it yields tight rates in covariance matrix estimation and Poisson rate matrix estimation problems for all unitarily invariant norms.
|
[
"The current paper presents a novel machinery for studying non-asymptotic minimax estimation of high-dimensional matrices, which yields tight minimax rates for a large collection of loss functions in a variety of problems",
"Based on the convex geometry of finite-dimensional Banach spaces, we first develop a volume ratio approach for determining minimax estimation rates of unconstrained normal mean matrices under all squared unitarily invariant norm losses",
"In addition, we establish the minimax rates for estimating mean matrices with submatrix sparsity, where the sparsity constraint introduces an additional term in the rate whose dependence on the norm differs completely from the rate of the unconstrained problem",
"Moreover, the approach is applicable to the matrix completion problem under the low-rank constraint",
"The new method also extends beyond the normal mean model",
"In particular, it yields tight rates in covariance matrix estimation and Poisson rate matrix estimation problems for all unitarily invariant norms"
] | 6
|
[] | 0
| false
|
[] |
[] | 193
|
Title: Volume Ratio, Sparsity, and Minimaxity under Unitarily Invariant Norms
Categories: math.ST, cs.IT, math.IT, stat.TH
Abstract: The current paper presents a novel machinery for studying non-asymptotic minimax estimation of high-dimensional matrices, which yields tight minimax rates for a large collection of loss functions in a variety of problems. Based on the convex geometry of finite-dimensional Banach spaces, we first develop a volume ratio approach for determining minimax estimation rates of unconstrained normal mean matrices under all squared unitarily invariant norm losses. In addition, we establish the minimax rates for estimating mean matrices with submatrix sparsity, where the sparsity constraint introduces an additional term in the rate whose dependence on the norm differs completely from the rate of the unconstrained problem. Moreover, the approach is applicable to the matrix completion problem under the low-rank constraint. The new method also extends beyond the normal mean model. In particular, it yields tight rates in covariance matrix estimation and Poisson rate matrix estimation problems for all unitarily invariant norms.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1508.05882
| 1
|
A quantum memory with near-millisecond coherence in circuit QED
|
Significant advances in coherence have made superconducting quantum circuits a viable platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent quantum systems could act as quantum memories for these circuits. A useful quantum memory must be rapidly addressable by qubits, while maintaining superior coherence. We demonstrate a novel superconducting microwave cavity architecture that is highly robust against major sources of loss that are encountered in the engineering of circuit QED systems. The architecture allows for near-millisecond storage of quantum states in a resonator while strong coupling between the resonator and a transmon qubit enables control, encoding, and readout at MHz rates. The observed coherence times constitute an improvement of almost an order of magnitude over those of the best available superconducting qubits. Our design is an ideal platform for studying coherent quantum optics and marks an important step towards hardware-efficient quantum computing with Josephson junction-based quantum circuits.
|
[
{
"name": "Matthew Reagor",
"orcid": null
},
{
"name": "Wolfgang Pfaff",
"orcid": null
},
{
"name": "Christopher Axline",
"orcid": null
},
{
"name": "Reinier W. Heeres",
"orcid": null
},
{
"name": "Nissim Ofek",
"orcid": null
},
{
"name": "Katrina Sliwa",
"orcid": null
},
{
"name": "Eric Holland",
"orcid": null
},
{
"name": "Chen Wang",
"orcid": null
},
{
"name": "Jacob Blumoff",
"orcid": null
},
{
"name": "Kevin Chou",
"orcid": null
},
{
"name": "Michael J. Hatridge",
"orcid": null
},
{
"name": "Luigi Frunzio",
"orcid": null
},
{
"name": "Michel H. Devoret",
"orcid": null
},
{
"name": "Liang Jiang",
"orcid": null
},
{
"name": "Robert J. Schoelkopf",
"orcid": null
}
] |
[
"quant-ph",
"cond-mat.mes-hall",
"cond-mat.supr-con"
] |
quant-ph
|
Other
|
2015-08-25
|
2016-07-13
|
10.1103/PhysRevB.94.014506
|
Phys. Rev. B 94, 014506 (2016)
| null |
arXiv License
|
XML-ArXiv-OAI
|
Significant advances in coherence have made superconducting quantum circuits a viable platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent quantum systems could act as quantum memories for these circuits. A useful quantum memory must be rapidly addressable by qubits, while maintaining superior coherence. We demonstrate a novel superconducting microwave cavity architecture that is highly robust against major sources of loss that are encountered in the engineering of circuit QED systems. The architecture allows for near-millisecond storage of quantum states in a resonator while strong coupling between the resonator and a transmon qubit enables control, encoding, and readout at MHz rates. The observed coherence times constitute an improvement of almost an order of magnitude over those of the best available superconducting qubits. Our design is an ideal platform for studying coherent quantum optics and marks an important step towards hardware-efficient quantum computing with Josephson junction-based quantum circuits.
|
[
"Significant advances in coherence have made superconducting quantum circuits a viable platform for fault-tolerant quantum computing",
"To further extend capabilities, highly coherent quantum systems could act as quantum memories for these circuits",
"A useful quantum memory must be rapidly addressable by qubits, while maintaining superior coherence",
"We demonstrate a novel superconducting microwave cavity architecture that is highly robust against major sources of loss that are encountered in the engineering of circuit QED systems",
"The architecture allows for near-millisecond storage of quantum states in a resonator while strong coupling between the resonator and a transmon qubit enables control, encoding, and readout at MHz rates",
"The observed coherence times constitute an improvement of almost an order of magnitude over those of the best available superconducting qubits",
"Our design is an ideal platform for studying coherent quantum optics and marks an important step towards hardware-efficient quantum computing with Josephson junction-based quantum circuits"
] | 7
|
[] | 0
| false
|
[] |
[] | 193
|
Title: A quantum memory with near-millisecond coherence in circuit QED
Categories: quant-ph, cond-mat.mes-hall, cond-mat.supr-con
Abstract: Significant advances in coherence have made superconducting quantum circuits a viable platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent quantum systems could act as quantum memories for these circuits. A useful quantum memory must be rapidly addressable by qubits, while maintaining superior coherence. We demonstrate a novel superconducting microwave cavity architecture that is highly robust against major sources of loss that are encountered in the engineering of circuit QED systems. The architecture allows for near-millisecond storage of quantum states in a resonator while strong coupling between the resonator and a transmon qubit enables control, encoding, and readout at MHz rates. The observed coherence times constitute an improvement of almost an order of magnitude over those of the best available superconducting qubits. Our design is an ideal platform for studying coherent quantum optics and marks an important step towards hardware-efficient quantum computing with Josephson junction-based quantum circuits.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ex/0510027
| 1
|
Bose Einstein correlations of neutral pion pairs at LEP
|
With the OPAL detector at LEP we measured at energies around the Z0 peak the Bose-Einstein Correlations (BECs) of neutral pion pairs. We compare the results of this measurement with former results obtained at LEP for hadrons including those obtained from Fermi-Dirac Correlations (FDCs).
|
[
{
"name": "M. Boutemeur",
"orcid": null
},
{
"name": "G. Giacomelli",
"orcid": null
}
] |
[
"hep-ex"
] |
hep-ex
|
Other
|
2005-10-10
|
2009-12-01
| null | null |
4 pages, PDF format. Talk given by G. Giacomelli at DPF 2003, Philadelphia, USA, 5-8 April 2003
|
arXiv License
|
XML-ArXiv-OAI
|
With the OPAL detector at LEP we measured at energies around the Z0 peak the Bose-Einstein Correlations (BECs) of neutral pion pairs. We compare the results of this measurement with former results obtained at LEP for hadrons including those obtained from Fermi-Dirac Correlations (FDCs).
|
[
"With the OPAL detector at LEP we measured at energies around the Z0 peak the Bose-Einstein Correlations (BECs) of neutral pion pairs",
"We compare the results of this measurement with former results obtained at LEP for hadrons including those obtained from Fermi-Dirac Correlations (FDCs)"
] | 2
|
[] | 0
| false
|
[] |
[] | 57
|
Title: Bose Einstein correlations of neutral pion pairs at LEP
Categories: hep-ex
Abstract: With the OPAL detector at LEP we measured at energies around the Z0 peak the Bose-Einstein Correlations (BECs) of neutral pion pairs. We compare the results of this measurement with former results obtained at LEP for hadrons including those obtained from Fermi-Dirac Correlations (FDCs).
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/9511063
| 1
|
Applications of Wavelets to Quantum Mechanics: a Pedagogical Example
|
We discuss in many details two quantum mechanical models of planar electrons which are very much related to the Fractional Quantum Hall Effect. In particular, we discuss the localization properties of the trial ground states of the models starting from considerations on the numerical results on the energy. We conclude that wavelet theory can be conveniently used in the description of the system. Finally we suggest applications of our results to the Fractional Quantum Hall Effect.
|
[
{
"name": "Fabio Bagarello",
"orcid": null
}
] |
[
"cond-mat"
] |
cond-mat
|
Other
|
1995-11-14
|
2009-11-30
|
10.1088/0305-4470/29/3/011
| null |
23 pages, Latex file, Accepted by Journal of Physics A
|
arXiv License
|
XML-ArXiv-OAI
|
We discuss in many details two quantum mechanical models of planar electrons which are very much related to the Fractional Quantum Hall Effect. In particular, we discuss the localization properties of the trial ground states of the models starting from considerations on the numerical results on the energy. We conclude that wavelet theory can be conveniently used in the description of the system. Finally we suggest applications of our results to the Fractional Quantum Hall Effect.
|
[
"We discuss in many details two quantum mechanical models of planar electrons which are very much related to the Fractional Quantum Hall Effect",
"In particular, we discuss the localization properties of the trial ground states of the models starting from considerations on the numerical results on the energy",
"We conclude that wavelet theory can be conveniently used in the description of the system",
"Finally we suggest applications of our results to the Fractional Quantum Hall Effect"
] | 4
|
[] | 0
| false
|
[] |
[] | 98
|
Title: Applications of Wavelets to Quantum Mechanics: a Pedagogical Example
Categories: cond-mat
Abstract: We discuss in many details two quantum mechanical models of planar electrons which are very much related to the Fractional Quantum Hall Effect. In particular, we discuss the localization properties of the trial ground states of the models starting from considerations on the numerical results on the energy. We conclude that wavelet theory can be conveniently used in the description of the system. Finally we suggest applications of our results to the Fractional Quantum Hall Effect.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1301.2631
| 1
|
The neuron's response at extended timescales
|
Many systems are modulated by unknown slow processes. This hinders analysis in highly non-linear systems, such as excitable systems. We show that for such systems, if the input matches the sparse `spiky' nature of the output, the spiking input-output relation can be derived. We use this relation to reproduce and interpret the irregular and complex 1/f response observed in isolated neurons stimulated over days. We decompose the neuronal response into contributions from its long history of internal noise and its short (few minutes) history of inputs, quantifying memory, noise and stability.
|
[
{
"name": "Daniel Soudry",
"orcid": null
},
{
"name": "Ron Meir",
"orcid": null
}
] |
[
"q-bio.NC",
"q-bio.QM"
] |
q-bio.NC
|
Other
|
2014-04-29
|
2014-05-01
| null | null |
1) Soudry D and Meir R (2014) The neuronal response at extended timescales: a linearized spiking input--output relation. Front. Comput. Neurosci. 8:29. doi: 10.3389/fncom.2014.00029 2) Soudry, D., and Meir, R. (2014). The neuronal response at extended timescales: long term correlations without long memory. Front. Comput. Neurosci. 8:35. doi: 10.3389/fncom.2014.00035. This is an obsolete version of the manuscript. The complete updated version was published on two papers - see in comments
|
arXiv License
|
XML-ArXiv-OAI
|
Many systems are modulated by unknown slow processes. This hinders analysis in highly non-linear systems, such as excitable systems. We show that for such systems, if the input matches the sparse `spiky' nature of the output, the spiking input-output relation can be derived. We use this relation to reproduce and interpret the irregular and complex 1/f response observed in isolated neurons stimulated over days. We decompose the neuronal response into contributions from its long history of internal noise and its short (few minutes) history of inputs, quantifying memory, noise and stability.
|
[
"Many systems are modulated by unknown slow processes",
"This hinders analysis in highly non-linear systems, such as excitable systems",
"We show that for such systems, if the input matches the sparse `spiky' nature of the output, the spiking input-output relation can be derived",
"We use this relation to reproduce and interpret the irregular and complex 1/f response observed in isolated neurons stimulated over days",
"We decompose the neuronal response into contributions from its long history of internal noise and its short (few minutes) history of inputs, quantifying memory, noise and stability"
] | 5
|
[] | 0
| false
|
[] |
[] | 118
|
Title: The neuron's response at extended timescales
Categories: q-bio.NC, q-bio.QM
Abstract: Many systems are modulated by unknown slow processes. This hinders analysis in highly non-linear systems, such as excitable systems. We show that for such systems, if the input matches the sparse `spiky' nature of the output, the spiking input-output relation can be derived. We use this relation to reproduce and interpret the irregular and complex 1/f response observed in isolated neurons stimulated over days. We decompose the neuronal response into contributions from its long history of internal noise and its short (few minutes) history of inputs, quantifying memory, noise and stability.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:math/9402216
| 1
|
Bracket notation for the `coefficient of' operator
|
When is a power series in , many authors now write `' for the coefficient of in , using a notation introduced by Goulden and Jackson in [, p. 1]. More controversial, however, is the proposal of the same authors [, p. 160] to let `' denote the coefficient of , i.e., times the coefficient of . An alternative generalization of , in which we define to be a linear function of both and , seems to be more useful because it facilitates algebraic manipulations. The purpose of this paper is to explore some of the properties of such a definition. The remarks are dedicated to Tony Hoare because of his lifelong interest in the improvement of notations that facilitate manipulation.
|
[
{
"name": "Donald E. Knuth",
"orcid": null
}
] |
[
"math.CA"
] |
math.CA
|
Mathematics
|
1994-02-23
|
2009-12-01
| null |
A Classical Mind, essays in honour of C. A. R. Hoare, 1994
| null |
arXiv License
|
XML-ArXiv-OAI
|
When is a power series in , many authors now write `' for the coefficient of in , using a notation introduced by Goulden and Jackson in [, p. 1]. More controversial, however, is the proposal of the same authors [, p. 160] to let `' denote the coefficient of , i.e., times the coefficient of . An alternative generalization of , in which we define to be a linear function of both and , seems to be more useful because it facilitates algebraic manipulations. The purpose of this paper is to explore some of the properties of such a definition. The remarks are dedicated to Tony Hoare because of his lifelong interest in the improvement of notations that facilitate manipulation.
|
[
"When is a power series in , many authors now write `' for the coefficient of in , using a notation introduced by Goulden and Jackson in [, p",
"More controversial, however, is the proposal of the same authors [, p",
"160] to let `' denote the coefficient of , i",
", times the coefficient of",
"An alternative generalization of , in which we define to be a linear function of both and , seems to be more useful because it facilitates algebraic manipulations",
"The purpose of this paper is to explore some of the properties of such a definition",
"The remarks are dedicated to Tony Hoare because of his lifelong interest in the improvement of notations that facilitate manipulation"
] | 7
|
[
"G(z)",
"z",
"[z^n] G(z)",
"z^n",
"G(z)",
"[z^n/n!] G(z)",
"z^n/n!",
"n!",
"z^n",
"[z^n] G(z)",
"[F(z)] G(z)",
"F",
"G"
] | 13
| true
|
[] |
[] | 157
|
Title: Bracket notation for the `coefficient of' operator
Categories: math.CA
Abstract: When is a power series in , many authors now write `' for the coefficient of in , using a notation introduced by Goulden and Jackson in [, p. 1]. More controversial, however, is the proposal of the same authors [, p. 160] to let `' denote the coefficient of , i.e., times the coefficient of . An alternative generalization of , in which we define to be a linear function of both and , seems to be more useful because it facilitates algebraic manipulations. The purpose of this paper is to explore some of the properties of such a definition. The remarks are dedicated to Tony Hoare because of his lifelong interest in the improvement of notations that facilitate manipulation.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1602.02503
| 1
|
Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30
|
The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association. Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on this sky region. Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were found. We perform a new characterization of Mercer 30 with unprecedented accuracy, combining NICMOS/HST and VVV photometric data with multi-epoch ISAAC/VLT H- and K-band spectra. Stellar parameters for most of spectroscopically observed cluster members are found through precise non-LTE atmosphere modeling with the CMFGEN code. Our spectrophotometric study for this cluster yields a new, revised distance of d = (12.4 +- 1.7) kpc and a total of Q = 6.70 x 10^50 Lyman ionizing photons. A cluster age of (4.0 +- 0.8) Myr is found through isochrone fitting, and a total mass of (1.6 +- 0.6) x 10^4 Msol is estimated thanks to our extensive knowledge of the post-main-sequence population. As a consequence, membership of Mercer 30 to the Dragonfish star-forming complex is confirmed, allowing us to use this cluster as a probe for the whole complex, which turns out to be extremely large (400 pc across) and located at the outer edge of the Sagittarius-Carina spiral arm (11 kpc from the Galactic Center). The Dragonfish complex hosts 19 young clusters or cluster candidates (including Mercer 30 and a new candidate presented in this work) and an estimated minimum of 9 field Wolf-Rayet stars. The sum of all these contributions accounts for, at least, 73% of the Dragonfish Nebula ionization and leaves little or no room for the alleged superluminous OB association; alternative explanations are discussed.
|
[
{
"name": "D. de la Fuente",
"orcid": null
},
{
"name": "F. Najarro",
"orcid": null
},
{
"name": "J. Borissova",
"orcid": null
},
{
"name": "S. Ramírez Alegría",
"orcid": null
},
{
"name": "M. M. Hanson",
"orcid": null
},
{
"name": "C. Trombley",
"orcid": null
},
{
"name": "D. F. Figer",
"orcid": null
},
{
"name": "B. Davies",
"orcid": null
},
{
"name": "M. Garcia",
"orcid": null
},
{
"name": "R. Kurtev",
"orcid": null
},
{
"name": "M. A. Urbaneja",
"orcid": null
},
{
"name": "L. C. Smith",
"orcid": null
},
{
"name": "P. W. Lucas",
"orcid": null
},
{
"name": "A. Herrero",
"orcid": null
}
] |
[
"astro-ph.GA",
"astro-ph.SR"
] |
astro-ph.GA
|
Other
|
2016-02-22
|
2016-04-20
|
10.1051/0004-6361/201528004
|
A&A 589, A69 (2016)
|
23 pages, 16 figures. Accepted for publication in Astronomy & Astrophysics; version after language edition
|
arXiv License
|
XML-ArXiv-OAI
|
The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association. Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on this sky region. Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were found. We perform a new characterization of Mercer 30 with unprecedented accuracy, combining NICMOS/HST and VVV photometric data with multi-epoch ISAAC/VLT H- and K-band spectra. Stellar parameters for most of spectroscopically observed cluster members are found through precise non-LTE atmosphere modeling with the CMFGEN code. Our spectrophotometric study for this cluster yields a new, revised distance of d = (12.4 +- 1.7) kpc and a total of Q = 6.70 x 10^50 Lyman ionizing photons. A cluster age of (4.0 +- 0.8) Myr is found through isochrone fitting, and a total mass of (1.6 +- 0.6) x 10^4 Msol is estimated thanks to our extensive knowledge of the post-main-sequence population. As a consequence, membership of Mercer 30 to the Dragonfish star-forming complex is confirmed, allowing us to use this cluster as a probe for the whole complex, which turns out to be extremely large (400 pc across) and located at the outer edge of the Sagittarius-Carina spiral arm (11 kpc from the Galactic Center). The Dragonfish complex hosts 19 young clusters or cluster candidates (including Mercer 30 and a new candidate presented in this work) and an estimated minimum of 9 field Wolf-Rayet stars. The sum of all these contributions accounts for, at least, 73% of the Dragonfish Nebula ionization and leaves little or no room for the alleged superluminous OB association; alternative explanations are discussed.
|
[
"The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association",
"Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on this sky region",
"Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were found",
"We perform a new characterization of Mercer 30 with unprecedented accuracy, combining NICMOS/HST and VVV photometric data with multi-epoch ISAAC/VLT H- and K-band spectra",
"Stellar parameters for most of spectroscopically observed cluster members are found through precise non-LTE atmosphere modeling with the CMFGEN code",
"Our spectrophotometric study for this cluster yields a new, revised distance of d = (12",
"7) kpc and a total of Q = 6",
"70 x 10^50 Lyman ionizing photons",
"8) Myr is found through isochrone fitting, and a total mass of (1",
"6) x 10^4 Msol is estimated thanks to our extensive knowledge of the post-main-sequence population",
"As a consequence, membership of Mercer 30 to the Dragonfish star-forming complex is confirmed, allowing us to use this cluster as a probe for the whole complex, which turns out to be extremely large (400 pc across) and located at the outer edge of the Sagittarius-Carina spiral arm (11 kpc from the Galactic Center)",
"The Dragonfish complex hosts 19 young clusters or cluster candidates (including Mercer 30 and a new candidate presented in this work) and an estimated minimum of 9 field Wolf-Rayet stars",
"The sum of all these contributions accounts for, at least, 73% of the Dragonfish Nebula ionization and leaves little or no room for the alleged superluminous OB association; alternative explanations are discussed"
] | 13
|
[] | 0
| false
|
[] |
[] | 357
|
Title: Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30
Categories: astro-ph.GA, astro-ph.SR
Abstract: The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association. Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on this sky region. Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were found. We perform a new characterization of Mercer 30 with unprecedented accuracy, combining NICMOS/HST and VVV photometric data with multi-epoch ISAAC/VLT H- and K-band spectra. Stellar parameters for most of spectroscopically observed cluster members are found through precise non-LTE atmosphere modeling with the CMFGEN code. Our spectrophotometric study for this cluster yields a new, revised distance of d = (12.4 +- 1.7) kpc and a total of Q = 6.70 x 10^50 Lyman ionizing photons. A cluster age of (4.0 +- 0.8) Myr is found through isochrone fitting, and a total mass of (1.6 +- 0.6) x 10^4 Msol is estimated thanks to our extensive knowledge of the post-main-sequence population. As a consequence, membership of Mercer 30 to the Dragonfish star-forming complex is confirmed, allowing us to use this cluster as a probe for the whole complex, which turns out to be extremely large (400 pc across) and located at the outer edge of the Sagittarius-Carina spiral arm (11 kpc from the Galactic Center). The Dragonfish complex hosts 19 young clusters or cluster candidates (including Mercer 30 and a new candidate presented in this work) and an estimated minimum of 9 field Wolf-Rayet stars. The sum of all these contributions accounts for, at least, 73% of the Dragonfish Nebula ionization and leaves little or no room for the alleged superluminous OB association; alternative explanations are discussed.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:physics/0602041
| 1
|
Possible Negative Pressure States in the Evolution of the Universe
|
Hydrodynamic derivation of the entrainment of matter induced by a surface elastic wave propagating along the flexible vacuum-matter interface is conducted by considering the nonlinear coupling between the interface and the rarefaction effect. The critical reflux values associated with the product of the second-order (unit) body forcing and the Reynolds number (representing the viscous dissipations) decrease as the Knudsen number (representing the rarefaction measure) increases from zero to 0.1. We obtained the critical bounds for matter-freezed or zero-volume-flow-rate states corresponding to specific Reynolds numbers (ratio of wave inertia and viscous dissipation effects) and wave numbers which might be linked to the evolution of the Universe. Our results also show that for positive evolution of the matter (the maximum speed of the matter (gas) appears at the center-line) there might be existence of negative pressure.
|
[
{
"name": "A. Kwang-Hua Chu",
"orcid": null
}
] |
[
"physics.gen-ph"
] |
physics.gen-ph
|
Physics
|
2009-04-11
|
2009-12-01
| null | null |
4 Figures in total
|
arXiv License
|
XML-ArXiv-OAI
|
Hydrodynamic derivation of the entrainment of matter induced by a surface elastic wave propagating along the flexible vacuum-matter interface is conducted by considering the nonlinear coupling between the interface and the rarefaction effect. The critical reflux values associated with the product of the second-order (unit) body forcing and the Reynolds number (representing the viscous dissipations) decrease as the Knudsen number (representing the rarefaction measure) increases from zero to 0.1. We obtained the critical bounds for matter-freezed or zero-volume-flow-rate states corresponding to specific Reynolds numbers (ratio of wave inertia and viscous dissipation effects) and wave numbers which might be linked to the evolution of the Universe. Our results also show that for positive evolution of the matter (the maximum speed of the matter (gas) appears at the center-line) there might be existence of negative pressure.
|
[
"Hydrodynamic derivation of the entrainment of matter induced by a surface elastic wave propagating along the flexible vacuum-matter interface is conducted by considering the nonlinear coupling between the interface and the rarefaction effect",
"The critical reflux values associated with the product of the second-order (unit) body forcing and the Reynolds number (representing the viscous dissipations) decrease as the Knudsen number (representing the rarefaction measure) increases from zero to 0",
"We obtained the critical bounds for matter-freezed or zero-volume-flow-rate states corresponding to specific Reynolds numbers (ratio of wave inertia and viscous dissipation effects) and wave numbers which might be linked to the evolution of the Universe",
"Our results also show that for positive evolution of the matter (the maximum speed of the matter (gas) appears at the center-line) there might be existence of negative pressure"
] | 4
|
[] | 0
| false
|
[] |
[] | 174
|
Title: Possible Negative Pressure States in the Evolution of the Universe
Categories: physics.gen-ph
Abstract: Hydrodynamic derivation of the entrainment of matter induced by a surface elastic wave propagating along the flexible vacuum-matter interface is conducted by considering the nonlinear coupling between the interface and the rarefaction effect. The critical reflux values associated with the product of the second-order (unit) body forcing and the Reynolds number (representing the viscous dissipations) decrease as the Knudsen number (representing the rarefaction measure) increases from zero to 0.1. We obtained the critical bounds for matter-freezed or zero-volume-flow-rate states corresponding to specific Reynolds numbers (ratio of wave inertia and viscous dissipation effects) and wave numbers which might be linked to the evolution of the Universe. Our results also show that for positive evolution of the matter (the maximum speed of the matter (gas) appears at the center-line) there might be existence of negative pressure.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1206.4770
| 1
|
On the Geometric Ergodicity of Two-Variable Gibbs Samplers
|
A Markov chain is geometrically ergodic if it converges to its in- variant distribution at a geometric rate in total variation norm. We study geo- metric ergodicity of deterministic and random scan versions of the two-variable Gibbs sampler. We give a sufficient condition which simultaneously guarantees both versions are geometrically ergodic. We also develop a method for simul- taneously establishing that both versions are subgeometrically ergodic. These general results allow us to characterize the convergence rate of two-variable Gibbs samplers in a particular family of discrete bivariate distributions.
|
[
{
"name": "Aixin Tan",
"orcid": null
},
{
"name": "Galin L. Jones",
"orcid": null
},
{
"name": "James P. Hobert",
"orcid": null
}
] |
[
"math.ST",
"stat.TH"
] |
math.ST
|
Mathematics
|
2012-06-21
|
2012-06-22
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
A Markov chain is geometrically ergodic if it converges to its in- variant distribution at a geometric rate in total variation norm. We study geo- metric ergodicity of deterministic and random scan versions of the two-variable Gibbs sampler. We give a sufficient condition which simultaneously guarantees both versions are geometrically ergodic. We also develop a method for simul- taneously establishing that both versions are subgeometrically ergodic. These general results allow us to characterize the convergence rate of two-variable Gibbs samplers in a particular family of discrete bivariate distributions.
|
[
"A Markov chain is geometrically ergodic if it converges to its in- variant distribution at a geometric rate in total variation norm",
"We study geo- metric ergodicity of deterministic and random scan versions of the two-variable Gibbs sampler",
"We give a sufficient condition which simultaneously guarantees both versions are geometrically ergodic",
"We also develop a method for simul- taneously establishing that both versions are subgeometrically ergodic",
"These general results allow us to characterize the convergence rate of two-variable Gibbs samplers in a particular family of discrete bivariate distributions"
] | 5
|
[] | 0
| false
|
[] |
[] | 114
|
Title: On the Geometric Ergodicity of Two-Variable Gibbs Samplers
Categories: math.ST, stat.TH
Abstract: A Markov chain is geometrically ergodic if it converges to its in- variant distribution at a geometric rate in total variation norm. We study geo- metric ergodicity of deterministic and random scan versions of the two-variable Gibbs sampler. We give a sufficient condition which simultaneously guarantees both versions are geometrically ergodic. We also develop a method for simul- taneously establishing that both versions are subgeometrically ergodic. These general results allow us to characterize the convergence rate of two-variable Gibbs samplers in a particular family of discrete bivariate distributions.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1102.0769
| 1
|
Constraining the dark energy equation of state using LISA observations of spinning Massive Black Hole binaries
|
Gravitational wave signals from coalescing Massive Black Hole (MBH) binaries could be used as standard sirens to measure cosmological parameters. The future space based gravitational wave observatory Laser Interferometer Space Antenna (LISA) will detect up to a hundred of those events, providing very accurate measurements of their luminosity distances. To constrain the cosmological parameters we also need to measure the redshift of the galaxy (or cluster of galaxies) hosting the merger. This requires the identification of a distinctive electromagnetic event associated to the binary coalescence. However, putative electromagnetic signatures may be too weak to be observed. Instead, we study here the possibility of constraining the cosmological parameters by enforcing statistical consistency between all the possible hosts detected within the measurement error box of a few dozen of low redshift (z<3) events. We construct MBH populations using merger tree realizations of the dark matter hierarchy in a LambdaCDM Universe, and we use data from the Millennium simulation to model the galaxy distribution in the LISA error box. We show that, assuming that all the other cosmological parameters are known, the parameter w describing the dark energy equation of state can be constrained to a 4-8% level (2sigma error), competitive with current uncertainties obtained by type Ia supernovae measurements, providing an independent test of our cosmological model.
|
[
{
"name": "Antoine Petiteau",
"orcid": null
},
{
"name": "Stanislav Babak",
"orcid": null
},
{
"name": "Alberto Sesana",
"orcid": null
}
] |
[
"astro-ph.CO",
"gr-qc"
] |
astro-ph.CO
|
Other
|
2011-02-03
|
2015-03-18
|
10.1088/0004-637X/732/2/82
|
Astrophys.J.732:82,2011
|
12 pages, 8 figures, revised version to address referee's comments, submitted to ApJ
|
arXiv License
|
XML-ArXiv-OAI
|
Gravitational wave signals from coalescing Massive Black Hole (MBH) binaries could be used as standard sirens to measure cosmological parameters. The future space based gravitational wave observatory Laser Interferometer Space Antenna (LISA) will detect up to a hundred of those events, providing very accurate measurements of their luminosity distances. To constrain the cosmological parameters we also need to measure the redshift of the galaxy (or cluster of galaxies) hosting the merger. This requires the identification of a distinctive electromagnetic event associated to the binary coalescence. However, putative electromagnetic signatures may be too weak to be observed. Instead, we study here the possibility of constraining the cosmological parameters by enforcing statistical consistency between all the possible hosts detected within the measurement error box of a few dozen of low redshift (z<3) events. We construct MBH populations using merger tree realizations of the dark matter hierarchy in a LambdaCDM Universe, and we use data from the Millennium simulation to model the galaxy distribution in the LISA error box. We show that, assuming that all the other cosmological parameters are known, the parameter w describing the dark energy equation of state can be constrained to a 4-8% level (2sigma error), competitive with current uncertainties obtained by type Ia supernovae measurements, providing an independent test of our cosmological model.
|
[
"Gravitational wave signals from coalescing Massive Black Hole (MBH) binaries could be used as standard sirens to measure cosmological parameters",
"The future space based gravitational wave observatory Laser Interferometer Space Antenna (LISA) will detect up to a hundred of those events, providing very accurate measurements of their luminosity distances",
"To constrain the cosmological parameters we also need to measure the redshift of the galaxy (or cluster of galaxies) hosting the merger",
"This requires the identification of a distinctive electromagnetic event associated to the binary coalescence",
"However, putative electromagnetic signatures may be too weak to be observed",
"Instead, we study here the possibility of constraining the cosmological parameters by enforcing statistical consistency between all the possible hosts detected within the measurement error box of a few dozen of low redshift (z<3) events",
"We construct MBH populations using merger tree realizations of the dark matter hierarchy in a LambdaCDM Universe, and we use data from the Millennium simulation to model the galaxy distribution in the LISA error box",
"We show that, assuming that all the other cosmological parameters are known, the parameter w describing the dark energy equation of state can be constrained to a 4-8% level (2sigma error), competitive with current uncertainties obtained by type Ia supernovae measurements, providing an independent test of our cosmological model"
] | 8
|
[] | 0
| false
|
[] |
[] | 279
|
Title: Constraining the dark energy equation of state using LISA observations of spinning Massive Black Hole binaries
Categories: astro-ph.CO, gr-qc
Abstract: Gravitational wave signals from coalescing Massive Black Hole (MBH) binaries could be used as standard sirens to measure cosmological parameters. The future space based gravitational wave observatory Laser Interferometer Space Antenna (LISA) will detect up to a hundred of those events, providing very accurate measurements of their luminosity distances. To constrain the cosmological parameters we also need to measure the redshift of the galaxy (or cluster of galaxies) hosting the merger. This requires the identification of a distinctive electromagnetic event associated to the binary coalescence. However, putative electromagnetic signatures may be too weak to be observed. Instead, we study here the possibility of constraining the cosmological parameters by enforcing statistical consistency between all the possible hosts detected within the measurement error box of a few dozen of low redshift (z<3) events. We construct MBH populations using merger tree realizations of the dark matter hierarchy in a LambdaCDM Universe, and we use data from the Millennium simulation to model the galaxy distribution in the LISA error box. We show that, assuming that all the other cosmological parameters are known, the parameter w describing the dark energy equation of state can be constrained to a 4-8% level (2sigma error), competitive with current uncertainties obtained by type Ia supernovae measurements, providing an independent test of our cosmological model.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0908.2425
| 1
|
All 4-dimensional static, spherically symmetric, 2-charge abelian Kaluza-Klein black holes and their CFT duals
|
We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes. Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure. For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms. For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity. In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, who used a cohomological approach, and Silva, who employed a covariant-Lagrangian formalism. At the Killing horizon, it is only Silva's algebra which acquires a central charge extension, and which enables us to recover the Bekenstein-Hawking black hole entropy from the Cardy formula. For the NENH geometry, the extremal black hole entropy is obtained only when the free parameter of the diffeomorphism generating vector fields is chosen such that the central terms of the two algebras are in agreement.
|
[
{
"name": "Edwin Barnes",
"orcid": null
},
{
"name": "Diana Vaman",
"orcid": null
},
{
"name": "Chaolun Wu",
"orcid": null
}
] |
[
"hep-th"
] |
hep-th
|
Other
|
2009-10-26
|
2011-03-14
|
10.1088/0264-9381/27/9/095019
|
Class.Quant.Grav.27:095019,2010
|
19 pages, minor changes, references added
|
arXiv License
|
XML-ArXiv-OAI
|
We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes. Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure. For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms. For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity. In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, who used a cohomological approach, and Silva, who employed a covariant-Lagrangian formalism. At the Killing horizon, it is only Silva's algebra which acquires a central charge extension, and which enables us to recover the Bekenstein-Hawking black hole entropy from the Cardy formula. For the NENH geometry, the extremal black hole entropy is obtained only when the free parameter of the diffeomorphism generating vector fields is chosen such that the central terms of the two algebras are in agreement.
|
[
"We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes",
"Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure",
"For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms",
"For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity",
"In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, who used a cohomological approach, and Silva, who employed a covariant-Lagrangian formalism",
"At the Killing horizon, it is only Silva's algebra which acquires a central charge extension, and which enables us to recover the Bekenstein-Hawking black hole entropy from the Cardy formula",
"For the NENH geometry, the extremal black hole entropy is obtained only when the free parameter of the diffeomorphism generating vector fields is chosen such that the central terms of the two algebras are in agreement"
] | 7
|
[] | 0
| false
|
[] |
[] | 243
|
Title: All 4-dimensional static, spherically symmetric, 2-charge abelian Kaluza-Klein black holes and their CFT duals
Categories: hep-th
Abstract: We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes. Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure. For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms. For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity. In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, who used a cohomological approach, and Silva, who employed a covariant-Lagrangian formalism. At the Killing horizon, it is only Silva's algebra which acquires a central charge extension, and which enables us to recover the Bekenstein-Hawking black hole entropy from the Cardy formula. For the NENH geometry, the extremal black hole entropy is obtained only when the free parameter of the diffeomorphism generating vector fields is chosen such that the central terms of the two algebras are in agreement.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1301.4064
| 1
|
Nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route
|
A method of preparing the nanoparticles of CaCu3Ti4O12 (CCTO) with the crystallite size varying from 30 to 200 nm is optimized at a temperature as low as 680 1C from the exothermic thermal decomposition of an oxalate precursor, CaCu3(TiO)4(C2O4)8 ? 9H2O. The phase singularity of the complex oxalate precursor is confirmed by the wet chemical analyses, X-ray diffraction, FT-IR and TGA,DTA analyses. The UV Vis reflectance and ESR spectra of CCTO powders indicate that the Cu(II) coordination changes from distorted octahedra to nearly flattened tetrahedra (squashed) to square-planar geometry with increasing annealing temperature. The HRTEM images have revealed that the evolution of the microstructure in nanoscale is related to the change in Cu(II) coordination around the surface regions for the chemically prepared powder specimens. The nearly flattened tetrahedral geometry prevails for CuO4 in the near surface regions of the particles, whereas square-planar CuO4 groups are dominant in the interior regions of the nanoparticles. The powders derived from the oxalate precursor have excellent sinterability, resulting in high-density ceramics which exhibited giant dielectric constants upto 40,000 (1 kHz) at 25 1C, accompanied by low dielectric loss 0.07.
|
[
{
"name": "P. Thomas",
"orcid": null
},
{
"name": "K. Dwarakanath",
"orcid": null
},
{
"name": "K. B. R. Varma",
"orcid": null
},
{
"name": "T. R. N. Kutty",
"orcid": null
}
] |
[
"cond-mat.mtrl-sci"
] |
cond-mat.mtrl-sci
|
Other
|
2013-01-17
|
2013-01-18
|
10.1016/j.jpcs.2008.05.022
|
Journal of Physics and Chemistry of Solids 69, 2008, 2594
| null |
arXiv License
|
XML-ArXiv-OAI
|
A method of preparing the nanoparticles of CaCu3Ti4O12 (CCTO) with the crystallite size varying from 30 to 200 nm is optimized at a temperature as low as 680 1C from the exothermic thermal decomposition of an oxalate precursor, CaCu3(TiO)4(C2O4)8 ? 9H2O. The phase singularity of the complex oxalate precursor is confirmed by the wet chemical analyses, X-ray diffraction, FT-IR and TGA,DTA analyses. The UV Vis reflectance and ESR spectra of CCTO powders indicate that the Cu(II) coordination changes from distorted octahedra to nearly flattened tetrahedra (squashed) to square-planar geometry with increasing annealing temperature. The HRTEM images have revealed that the evolution of the microstructure in nanoscale is related to the change in Cu(II) coordination around the surface regions for the chemically prepared powder specimens. The nearly flattened tetrahedral geometry prevails for CuO4 in the near surface regions of the particles, whereas square-planar CuO4 groups are dominant in the interior regions of the nanoparticles. The powders derived from the oxalate precursor have excellent sinterability, resulting in high-density ceramics which exhibited giant dielectric constants upto 40,000 (1 kHz) at 25 1C, accompanied by low dielectric loss 0.07.
|
[
"A method of preparing the nanoparticles of CaCu3Ti4O12 (CCTO) with the crystallite size varying from 30 to 200 nm is optimized at a temperature as low as 680 1C from the exothermic thermal decomposition of an oxalate precursor, CaCu3(TiO)4(C2O4)8 ? 9H2O",
"The phase singularity of the complex oxalate precursor is confirmed by the wet chemical analyses, X-ray diffraction, FT-IR and TGA,DTA analyses",
"The UV Vis reflectance and ESR spectra of CCTO powders indicate that the Cu(II) coordination changes from distorted octahedra to nearly flattened tetrahedra (squashed) to square-planar geometry with increasing annealing temperature",
"The HRTEM images have revealed that the evolution of the microstructure in nanoscale is related to the change in Cu(II) coordination around the surface regions for the chemically prepared powder specimens",
"The nearly flattened tetrahedral geometry prevails for CuO4 in the near surface regions of the particles, whereas square-planar CuO4 groups are dominant in the interior regions of the nanoparticles",
"The powders derived from the oxalate precursor have excellent sinterability, resulting in high-density ceramics which exhibited giant dielectric constants upto 40,000 (1 kHz) at 25 1C, accompanied by low dielectric loss 0"
] | 6
|
[] | 0
| false
|
[] |
[] | 240
|
Title: Nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route
Categories: cond-mat.mtrl-sci
Abstract: A method of preparing the nanoparticles of CaCu3Ti4O12 (CCTO) with the crystallite size varying from 30 to 200 nm is optimized at a temperature as low as 680 1C from the exothermic thermal decomposition of an oxalate precursor, CaCu3(TiO)4(C2O4)8 ? 9H2O. The phase singularity of the complex oxalate precursor is confirmed by the wet chemical analyses, X-ray diffraction, FT-IR and TGA,DTA analyses. The UV Vis reflectance and ESR spectra of CCTO powders indicate that the Cu(II) coordination changes from distorted octahedra to nearly flattened tetrahedra (squashed) to square-planar geometry with increasing annealing temperature. The HRTEM images have revealed that the evolution of the microstructure in nanoscale is related to the change in Cu(II) coordination around the surface regions for the chemically prepared powder specimens. The nearly flattened tetrahedral geometry prevails for CuO4 in the near surface regions of the particles, whereas square-planar CuO4 groups are dominant in the interior regions of the nanoparticles. The powders derived from the oxalate precursor have excellent sinterability, resulting in high-density ceramics which exhibited giant dielectric constants upto 40,000 (1 kHz) at 25 1C, accompanied by low dielectric loss 0.07.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1512.08895
| 1
|
Revisiting Scalar Quark Hidden Sector in Light of 750-GeV Diphoton Resonance
|
In this short note, we revisit the model of a CP-even singlet scalar resonance proposed in arXiv:1507.02483, where the resonance appears as the lightest composite state made of scalar quarks participating in hidden strong dynamics. We show that the model can consistently explain the excess of diphoton events with an invariant mass around 750GeV reported by both the ATLAS and CMS experiments. We also discuss the nature of the charged composite states in the TeV range which accompany to the neutral scalar. Due to inseparability of the dynamical scale and the mass of the resonance, the model also predicts signatures associated with the hidden dynamics such as leptons, jets along with multiple photons at future collider experiments. We also associate the TeV-scale dynamics behind the resonance with an explanation of dark matter.
|
[
{
"name": "Cheng-Wei Chiang",
"orcid": null
},
{
"name": "Masahiro Ibe",
"orcid": null
},
{
"name": "Tsutomu T. Yanagida",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
2016-01-11
|
2016-01-12
| null | null |
16 pages, 2 figures, statements corrected, reference added
|
arXiv License
|
XML-ArXiv-OAI
|
In this short note, we revisit the model of a CP-even singlet scalar resonance proposed in arXiv:1507.02483, where the resonance appears as the lightest composite state made of scalar quarks participating in hidden strong dynamics. We show that the model can consistently explain the excess of diphoton events with an invariant mass around 750GeV reported by both the ATLAS and CMS experiments. We also discuss the nature of the charged composite states in the TeV range which accompany to the neutral scalar. Due to inseparability of the dynamical scale and the mass of the resonance, the model also predicts signatures associated with the hidden dynamics such as leptons, jets along with multiple photons at future collider experiments. We also associate the TeV-scale dynamics behind the resonance with an explanation of dark matter.
|
[
"In this short note, we revisit the model of a CP-even singlet scalar resonance proposed in arXiv:1507",
"02483, where the resonance appears as the lightest composite state made of scalar quarks participating in hidden strong dynamics",
"We show that the model can consistently explain the excess of diphoton events with an invariant mass around 750GeV reported by both the ATLAS and CMS experiments",
"We also discuss the nature of the charged composite states in the TeV range which accompany to the neutral scalar",
"Due to inseparability of the dynamical scale and the mass of the resonance, the model also predicts signatures associated with the hidden dynamics such as leptons, jets along with multiple photons at future collider experiments",
"We also associate the TeV-scale dynamics behind the resonance with an explanation of dark matter"
] | 6
|
[] | 0
| false
|
[] |
[] | 171
|
Title: Revisiting Scalar Quark Hidden Sector in Light of 750-GeV Diphoton Resonance
Categories: hep-ph
Abstract: In this short note, we revisit the model of a CP-even singlet scalar resonance proposed in arXiv:1507.02483, where the resonance appears as the lightest composite state made of scalar quarks participating in hidden strong dynamics. We show that the model can consistently explain the excess of diphoton events with an invariant mass around 750GeV reported by both the ATLAS and CMS experiments. We also discuss the nature of the charged composite states in the TeV range which accompany to the neutral scalar. Due to inseparability of the dynamical scale and the mass of the resonance, the model also predicts signatures associated with the hidden dynamics such as leptons, jets along with multiple photons at future collider experiments. We also associate the TeV-scale dynamics behind the resonance with an explanation of dark matter.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0511197
| 1
|
Seeing Darkness: the New Cosmology
|
We present some useful ways to visualize the nature of dark energy and the effects of the accelerating expansion on cosmological quantities. Expansion probes such as Type Ia supernovae distances and growth probes such as weak gravitational lensing and the evolution of large scale structure provide powerful tests in complementarity. We present a ``ladder'' diagram, showing that in addition to dramatic improvements in precision, next generation probes will provide insight through an increasing ability to test assumptions of the cosmological framework, including gravity beyond general relativity.
|
[
{
"name": "Eric V. Linder",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2005-11-07
|
2009-12-01
|
10.1088/1742-6596/39/1/013
|
J.Phys.Conf.Ser.39:56-62,2006
|
plenary talk at TAUP2005; to appear in Journal of Physics; 7 pages
|
arXiv License
|
XML-ArXiv-OAI
|
We present some useful ways to visualize the nature of dark energy and the effects of the accelerating expansion on cosmological quantities. Expansion probes such as Type Ia supernovae distances and growth probes such as weak gravitational lensing and the evolution of large scale structure provide powerful tests in complementarity. We present a ``ladder'' diagram, showing that in addition to dramatic improvements in precision, next generation probes will provide insight through an increasing ability to test assumptions of the cosmological framework, including gravity beyond general relativity.
|
[
"We present some useful ways to visualize the nature of dark energy and the effects of the accelerating expansion on cosmological quantities",
"Expansion probes such as Type Ia supernovae distances and growth probes such as weak gravitational lensing and the evolution of large scale structure provide powerful tests in complementarity",
"We present a ``ladder'' diagram, showing that in addition to dramatic improvements in precision, next generation probes will provide insight through an increasing ability to test assumptions of the cosmological framework, including gravity beyond general relativity"
] | 3
|
[] | 0
| false
|
[] |
[] | 111
|
Title: Seeing Darkness: the New Cosmology
Categories: astro-ph
Abstract: We present some useful ways to visualize the nature of dark energy and the effects of the accelerating expansion on cosmological quantities. Expansion probes such as Type Ia supernovae distances and growth probes such as weak gravitational lensing and the evolution of large scale structure provide powerful tests in complementarity. We present a ``ladder'' diagram, showing that in addition to dramatic improvements in precision, next generation probes will provide insight through an increasing ability to test assumptions of the cosmological framework, including gravity beyond general relativity.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0605545
| 1
|
Missing Galactic PNe: [S III] Imaging Survey
|
The total number of Galactic planetary nebulae is highly uncertain; the most inclusive current catalog contains only ~ 1,500. We will use the PRISM wide-field imager on the 1.83 m Perkins Telescope to conduct a pilot survey of the Galactic plane in search of [S III] emission from planetary nebulae obscured by dust and missed by surveys of H-alpha. We are employing the method of Jacoby & Van de Steene, who surveyed the bulge for 9532 Angstrom [S III] emission. In addition to seeing through more of the extinction, use of the [S III] emission line will a priori reject the most troublesome catalog contaminants: ultracompact H II regions.
|
[
{
"name": "J. Shiode",
"orcid": null
},
{
"name": "D. P. Clemens",
"orcid": null
},
{
"name": "K. A. Janes",
"orcid": null
},
{
"name": "A. Pinnick",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2006-05-22
|
2009-12-01
|
10.1017/S174392130600398X
| null |
2 pages, 2 figures, to be published in Proc. IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond (3-7 April 2006), eds. M. J. Barlow & R. H. Mendez (Cambridge Univ. Press)
|
arXiv License
|
XML-ArXiv-OAI
|
The total number of Galactic planetary nebulae is highly uncertain; the most inclusive current catalog contains only ~ 1,500. We will use the PRISM wide-field imager on the 1.83 m Perkins Telescope to conduct a pilot survey of the Galactic plane in search of [S III] emission from planetary nebulae obscured by dust and missed by surveys of H-alpha. We are employing the method of Jacoby & Van de Steene, who surveyed the bulge for 9532 Angstrom [S III] emission. In addition to seeing through more of the extinction, use of the [S III] emission line will a priori reject the most troublesome catalog contaminants: ultracompact H II regions.
|
[
"The total number of Galactic planetary nebulae is highly uncertain; the most inclusive current catalog contains only ~ 1,500",
"We will use the PRISM wide-field imager on the 1",
"83 m Perkins Telescope to conduct a pilot survey of the Galactic plane in search of [S III] emission from planetary nebulae obscured by dust and missed by surveys of H-alpha",
"We are employing the method of Jacoby & Van de Steene, who surveyed the bulge for 9532 Angstrom [S III] emission",
"In addition to seeing through more of the extinction, use of the [S III] emission line will a priori reject the most troublesome catalog contaminants: ultracompact H II regions"
] | 5
|
[] | 0
| false
|
[] |
[] | 141
|
Title: Missing Galactic PNe: [S III] Imaging Survey
Categories: astro-ph
Abstract: The total number of Galactic planetary nebulae is highly uncertain; the most inclusive current catalog contains only ~ 1,500. We will use the PRISM wide-field imager on the 1.83 m Perkins Telescope to conduct a pilot survey of the Galactic plane in search of [S III] emission from planetary nebulae obscured by dust and missed by surveys of H-alpha. We are employing the method of Jacoby & Van de Steene, who surveyed the bulge for 9532 Angstrom [S III] emission. In addition to seeing through more of the extinction, use of the [S III] emission line will a priori reject the most troublesome catalog contaminants: ultracompact H II regions.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0710.1130
| 1
|
Topological susceptibility in two-flavor lattice QCD with exact chiral symmetry
|
We determine the topological susceptibility in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses exact chiral symmetry. Simulations are performed on a lattice at lattice spacing 0.12 fm at six sea quark masses ranging in -- with the physical strange quark mass. The is extracted from the constant behavior of the time-correlation of flavor-singlet pseudo-scalar meson two-point function at large distances, which arises from the finite size effect due to the fixed topology. In the small regime, our result of is proportional to as expected from chiral effective theory. Using the formula by Leutwyler-Smilga, we obtain the chiral condensate in QCD as , in good agreement with our previous result obtained in the -regime.
|
[
{
"name": "S. Aoki",
"orcid": null
},
{
"name": "T. W. Chiu",
"orcid": null
},
{
"name": "H. Fukaya",
"orcid": null
},
{
"name": "S. Hashimoto",
"orcid": null
},
{
"name": "T. H. Hsieh",
"orcid": null
},
{
"name": "T. Kaneko",
"orcid": null
},
{
"name": "H. Matsufuru",
"orcid": null
},
{
"name": "J. Noaki",
"orcid": null
},
{
"name": "K. Ogawa",
"orcid": null
},
{
"name": "T. Onogi",
"orcid": null
},
{
"name": "N. Yamada",
"orcid": null
}
] |
[
"hep-lat",
"hep-ph",
"hep-th"
] |
hep-lat
|
Other
|
2008-06-11
|
2009-12-01
|
10.1016/j.physletb.2008.06.039
|
Phys.Lett.B665:294-297,2008
|
11 pages, 3 figures, v2: accepted for publication in PLB
|
arXiv License
|
XML-ArXiv-OAI
|
We determine the topological susceptibility in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses exact chiral symmetry. Simulations are performed on a lattice at lattice spacing 0.12 fm at six sea quark masses ranging in -- with the physical strange quark mass. The is extracted from the constant behavior of the time-correlation of flavor-singlet pseudo-scalar meson two-point function at large distances, which arises from the finite size effect due to the fixed topology. In the small regime, our result of is proportional to as expected from chiral effective theory. Using the formula by Leutwyler-Smilga, we obtain the chiral condensate in QCD as , in good agreement with our previous result obtained in the -regime.
|
[
"We determine the topological susceptibility in two-flavor QCD using the lattice simulations at a fixed topological sector",
"The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses exact chiral symmetry",
"Simulations are performed on a lattice at lattice spacing 0",
"12 fm at six sea quark masses ranging in -- with the physical strange quark mass",
"The is extracted from the constant behavior of the time-correlation of flavor-singlet pseudo-scalar meson two-point function at large distances, which arises from the finite size effect due to the fixed topology",
"In the small regime, our result of is proportional to as expected from chiral effective theory",
"Using the formula by Leutwyler-Smilga, we obtain the chiral condensate in QCD as , in good agreement with our previous result obtained in the -regime"
] | 7
|
[
"χ_t",
"16^3 \\times 32",
"\\sim",
"m_q",
"m_s/6",
"m_s",
"m_s",
"χ_t",
"m_q",
"χ_t",
"m_q",
"χ_t=m_qΣ/N_f",
"N_f=2",
"Σ^{\\bar{\\mathrm{MS}}}(\\mathrm{2 GeV}) = [252(5)(10) \\mathrm{MeV}]^3",
"ε"
] | 15
| true
|
[] |
[] | 172
|
Title: Topological susceptibility in two-flavor lattice QCD with exact chiral symmetry
Categories: hep-lat, hep-ph, hep-th
Abstract: We determine the topological susceptibility in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the lattice using the overlap-Dirac operator which possesses exact chiral symmetry. Simulations are performed on a lattice at lattice spacing 0.12 fm at six sea quark masses ranging in -- with the physical strange quark mass. The is extracted from the constant behavior of the time-correlation of flavor-singlet pseudo-scalar meson two-point function at large distances, which arises from the finite size effect due to the fixed topology. In the small regime, our result of is proportional to as expected from chiral effective theory. Using the formula by Leutwyler-Smilga, we obtain the chiral condensate in QCD as , in good agreement with our previous result obtained in the -regime.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:gr-qc/0203080
| 1
|
The cosmological origin of Higgs particles
|
A proposal of the cosmological origin of Higgs particles is given. We show, that the Higgs field could be created from the vacuum quantum conformal fluctuation of Anti-de Sitter space-time, the spontaneous breaking of vacuum symmetry, and the mass of Higgs particle are related to the cosmological constant of our universe,especially the theoretical estimated mass m of Higgs particles is m =.
|
[
{
"name": "Liao Liu",
"orcid": null
},
{
"name": "Shouyong Pei",
"orcid": null
}
] |
[
"gr-qc"
] |
gr-qc
|
Other
|
2002-03-24
|
2009-11-30
|
10.1088/0256-307X/20/5/354
|
Chin.Phys.Lett. 20 (2003) 780-782
|
7 pages,no figures
|
arXiv License
|
XML-ArXiv-OAI
|
A proposal of the cosmological origin of Higgs particles is given. We show, that the Higgs field could be created from the vacuum quantum conformal fluctuation of Anti-de Sitter space-time, the spontaneous breaking of vacuum symmetry, and the mass of Higgs particle are related to the cosmological constant of our universe,especially the theoretical estimated mass m of Higgs particles is m =.
|
[
"A proposal of the cosmological origin of Higgs particles is given",
"We show, that the Higgs field could be created from the vacuum quantum conformal fluctuation of Anti-de Sitter space-time, the spontaneous breaking of vacuum symmetry, and the mass of Higgs particle are related to the cosmological constant of our universe,especially the theoretical estimated mass m of Higgs particles is m ="
] | 2
|
[
"_{H}",
"_{H}=\\sqrt{-2μ^{2}}",
"\\sqrt{|Λ/π}"
] | 3
| true
|
[] |
[] | 80
|
Title: The cosmological origin of Higgs particles
Categories: gr-qc
Abstract: A proposal of the cosmological origin of Higgs particles is given. We show, that the Higgs field could be created from the vacuum quantum conformal fluctuation of Anti-de Sitter space-time, the spontaneous breaking of vacuum symmetry, and the mass of Higgs particle are related to the cosmological constant of our universe,especially the theoretical estimated mass m of Higgs particles is m =.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1410.2546
| 1
|
Static quark-antiquark potential in the quark-gluon plasma from lattice QCD
|
We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition. Its values are obtained from non-perturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription. We find that the real part, both in a gluonic medium as well as in realistic QCD with light , and quarks, lies close to the color singlet free energies in Coulomb gauge and shows Debye screening above the (pseudo) critical temperature . The imaginary part is estimated in the gluonic medium, where we find that it is of the same order of magnitude as in hard-thermal loop resummed perturbation theory in the deconfined phase.
|
[
{
"name": "Yannis Burnier",
"orcid": null
},
{
"name": "Olaf Kaczmarek",
"orcid": null
},
{
"name": "Alexander Rothkopf",
"orcid": null
}
] |
[
"hep-lat",
"hep-ph",
"nucl-th"
] |
hep-lat
|
Other
|
2014-10-09
|
2015-03-04
|
10.1103/PhysRevLett.114.082001
|
Phys. Rev. Lett. 114, 082001 (2015)
|
5 pages, 3 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition. Its values are obtained from non-perturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription. We find that the real part, both in a gluonic medium as well as in realistic QCD with light , and quarks, lies close to the color singlet free energies in Coulomb gauge and shows Debye screening above the (pseudo) critical temperature . The imaginary part is estimated in the gluonic medium, where we find that it is of the same order of magnitude as in hard-thermal loop resummed perturbation theory in the deconfined phase.
|
[
"We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition",
"Its values are obtained from non-perturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription",
"We find that the real part, both in a gluonic medium as well as in realistic QCD with light , and quarks, lies close to the color singlet free energies in Coulomb gauge and shows Debye screening above the (pseudo) critical temperature",
"The imaginary part is estimated in the gluonic medium, where we find that it is of the same order of magnitude as in hard-thermal loop resummed perturbation theory in the deconfined phase"
] | 4
|
[
"u",
"d",
"s",
"T_c"
] | 4
| true
|
[] |
[] | 149
|
Title: Static quark-antiquark potential in the quark-gluon plasma from lattice QCD
Categories: hep-lat, hep-ph, nucl-th
Abstract: We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition. Its values are obtained from non-perturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription. We find that the real part, both in a gluonic medium as well as in realistic QCD with light , and quarks, lies close to the color singlet free energies in Coulomb gauge and shows Debye screening above the (pseudo) critical temperature . The imaginary part is estimated in the gluonic medium, where we find that it is of the same order of magnitude as in hard-thermal loop resummed perturbation theory in the deconfined phase.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1307.4155
| 1
|
Proof of a Conjecture of Hirschhorn and Sellers on Overpartitions
|
Let denote the number of overpartitions of . It was conjectured by Hirschhorn and Sellers that for . Employing 2-dissection formulas of quotients of theta functions due to Ramanujan, and Hirschhorn and Sellers, we obtain a generating function for modulo 5. Using the -parametrization of theta functions given by Alaca, Alaca and Williams, we give a proof of the congruence . Combining this congruence and the congruence obtained by Hirschhorn and Sellers, and Fortin, Jacob and Mathieu, we give a proof of the conjecture of Hirschhorn and Sellers.
|
[
{
"name": "William Y. C. Chen",
"orcid": null
},
{
"name": "Ernest X. W. Xia",
"orcid": null
}
] |
[
"math.CO",
"math.NT"
] |
math.CO
|
Mathematics
|
2013-07-16
|
2013-07-17
| null | null |
11 pages
|
arXiv License
|
XML-ArXiv-OAI
|
Let denote the number of overpartitions of . It was conjectured by Hirschhorn and Sellers that for . Employing 2-dissection formulas of quotients of theta functions due to Ramanujan, and Hirschhorn and Sellers, we obtain a generating function for modulo 5. Using the -parametrization of theta functions given by Alaca, Alaca and Williams, we give a proof of the congruence . Combining this congruence and the congruence obtained by Hirschhorn and Sellers, and Fortin, Jacob and Mathieu, we give a proof of the conjecture of Hirschhorn and Sellers.
|
[
"Let denote the number of overpartitions of",
"It was conjectured by Hirschhorn and Sellers that for",
"Employing 2-dissection formulas of quotients of theta functions due to Ramanujan, and Hirschhorn and Sellers, we obtain a generating function for modulo 5",
"Using the -parametrization of theta functions given by Alaca, Alaca and Williams, we give a proof of the congruence",
"Combining this congruence and the congruence obtained by Hirschhorn and Sellers, and Fortin, Jacob and Mathieu, we give a proof of the conjecture of Hirschhorn and Sellers"
] | 5
|
[
"\\bar{p}(n)",
"n",
"\\bar{p}(40n+35)\\equiv 0\\ ({\\rm mod\\} 40)",
"n\\geq 0",
"\\bar{p}(40n+35)",
"(p, k)",
"\\bar{p}(40n+35)\\equiv 0\\ ({\\rm mod\\} 5)",
"\\bar{p}(4n+3)\\equiv 0\\ ({\\rm mod\\} 8)"
] | 8
| true
|
[] |
[] | 114
|
Title: Proof of a Conjecture of Hirschhorn and Sellers on Overpartitions
Categories: math.CO, math.NT
Abstract: Let denote the number of overpartitions of . It was conjectured by Hirschhorn and Sellers that for . Employing 2-dissection formulas of quotients of theta functions due to Ramanujan, and Hirschhorn and Sellers, we obtain a generating function for modulo 5. Using the -parametrization of theta functions given by Alaca, Alaca and Williams, we give a proof of the congruence . Combining this congruence and the congruence obtained by Hirschhorn and Sellers, and Fortin, Jacob and Mathieu, we give a proof of the conjecture of Hirschhorn and Sellers.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0709.2908
| 1
|
Three lectures on elliptic surfaces and curves of high rank
|
Over the past two years we have improved several of the (Mordell-Weil) rank records for elliptic curves over Q and nonconstant elliptic curves over Q(t). For example, we found the first example of a curve E/Q with 28 independent points P_i in E(Q) (the previous record was 24, by R.Martin and W.McMillen 2000), and the first example of a curve over Q with Mordell-Weil group isomorphic with (Z/2Z) x Z^18 (the previous rank record for a curve with a 2-torsion point was 15, by Dujella 2002). In these lectures we give some of the background, theory, and computational tools that led to these new records and related applications. I Context and overview: the theorems of Mordell(-Weil) and Mazur; the rank problem; the approaches of Neron--Shioda and Mestre; elliptic surfaces and Neron specialization; fields other than Q. II Elliptic surfaces and K3 surfaces: the Mordell-Weil and Neron-Severi groups; K3 surfaces of high Neron-Severi rank and their moduli; an elliptic K3 surface over Q of Mordell-Weil rank 17. Some other applications of K3 surfaces of high rank and their moduli. III Computational issues, techniques, and results: slices of Niemeier lattices; finding and transforming models of K3 surfaces of high rank; searching for good specializations. Summary of new rank records for elliptic curves.
|
[
{
"name": "Noam D. Elkies",
"orcid": null
}
] |
[
"math.NT",
"math.AG"
] |
math.NT
|
Mathematics
|
2007-09-18
|
2009-12-01
| null | null |
14 pages; extended abstract for an invited lecture series at the 7/2007 Oberwolfach workshop ``Explicit Methods in Number Theory'', expanded from my lecture notes for publication in the Oberwolfach Reports
|
arXiv License
|
XML-ArXiv-OAI
|
Over the past two years we have improved several of the (Mordell-Weil) rank records for elliptic curves over Q and nonconstant elliptic curves over Q(t). For example, we found the first example of a curve E/Q with 28 independent points P_i in E(Q) (the previous record was 24, by R.Martin and W.McMillen 2000), and the first example of a curve over Q with Mordell-Weil group isomorphic with (Z/2Z) x Z^18 (the previous rank record for a curve with a 2-torsion point was 15, by Dujella 2002). In these lectures we give some of the background, theory, and computational tools that led to these new records and related applications. I Context and overview: the theorems of Mordell(-Weil) and Mazur; the rank problem; the approaches of Neron--Shioda and Mestre; elliptic surfaces and Neron specialization; fields other than Q. II Elliptic surfaces and K3 surfaces: the Mordell-Weil and Neron-Severi groups; K3 surfaces of high Neron-Severi rank and their moduli; an elliptic K3 surface over Q of Mordell-Weil rank 17. Some other applications of K3 surfaces of high rank and their moduli. III Computational issues, techniques, and results: slices of Niemeier lattices; finding and transforming models of K3 surfaces of high rank; searching for good specializations. Summary of new rank records for elliptic curves.
|
[
"Over the past two years we have improved several of the (Mordell-Weil) rank records for elliptic curves over Q and nonconstant elliptic curves over Q(t)",
"For example, we found the first example of a curve E/Q with 28 independent points P_i in E(Q) (the previous record was 24, by R",
"McMillen 2000), and the first example of a curve over Q with Mordell-Weil group isomorphic with (Z/2Z) x Z^18 (the previous rank record for a curve with a 2-torsion point was 15, by Dujella 2002)",
"In these lectures we give some of the background, theory, and computational tools that led to these new records and related applications",
"I Context and overview: the theorems of Mordell(-Weil) and Mazur; the rank problem; the approaches of Neron--Shioda and Mestre; elliptic surfaces and Neron specialization; fields other than Q",
"II Elliptic surfaces and K3 surfaces: the Mordell-Weil and Neron-Severi groups; K3 surfaces of high Neron-Severi rank and their moduli; an elliptic K3 surface over Q of Mordell-Weil rank 17",
"Some other applications of K3 surfaces of high rank and their moduli",
"III Computational issues, techniques, and results: slices of Niemeier lattices; finding and transforming models of K3 surfaces of high rank; searching for good specializations",
"Summary of new rank records for elliptic curves"
] | 9
|
[] | 0
| false
|
[] |
[] | 273
|
Title: Three lectures on elliptic surfaces and curves of high rank
Categories: math.NT, math.AG
Abstract: Over the past two years we have improved several of the (Mordell-Weil) rank records for elliptic curves over Q and nonconstant elliptic curves over Q(t). For example, we found the first example of a curve E/Q with 28 independent points P_i in E(Q) (the previous record was 24, by R.Martin and W.McMillen 2000), and the first example of a curve over Q with Mordell-Weil group isomorphic with (Z/2Z) x Z^18 (the previous rank record for a curve with a 2-torsion point was 15, by Dujella 2002). In these lectures we give some of the background, theory, and computational tools that led to these new records and related applications. I Context and overview: the theorems of Mordell(-Weil) and Mazur; the rank problem; the approaches of Neron--Shioda and Mestre; elliptic surfaces and Neron specialization; fields other than Q. II Elliptic surfaces and K3 surfaces: the Mordell-Weil and Neron-Severi groups; K3 surfaces of high Neron-Severi rank and their moduli; an elliptic K3 surface over Q of Mordell-Weil rank 17. Some other applications of K3 surfaces of high rank and their moduli. III Computational issues, techniques, and results: slices of Niemeier lattices; finding and transforming models of K3 surfaces of high rank; searching for good specializations. Summary of new rank records for elliptic curves.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:math/0108015
| 1
|
The global quantum duality principle: theory, examples, applications
|
The "quantum duality principle" states that a quantisation of a Lie bialgebra provides also a quantisation of the dual formal Poisson group and, conversely, a quantisation of a formal Poisson group yields a quantisation of the dual Lie bialgebra as well. We extend this to a much more general result: namely, given any principal ideal domain R, for each prime h in R we establish sort of an "inner" Galois' correspondence on the category HA of torsionless Hopf algebras over R, via the definition of two functors (from HA to itself) such that the image of the first, resp. of the second, is the full subcategory of those Hopf algebras which are commutative, resp. cocommutative, modulo h (i.e. they are "quantum function algebras" (=QFA), resp. "quantum universal enveloping algebras" (=QUEA), at h). In particular we provide a machine to get two quantum groups - a QFA and a QUEA - out of any Hopf algebra H over a field k: just plug in a parameter x and apply the functors to H[x] for h = x. Several relevant examples are studied in full detail: the trivial quantisations, the semisimple groups, the Euclidean group, the Heisenberg group, and the Kostant-Kirillov structure on any Lie algebra; furthermore, an interesting application to renormalisation theory in quantum electro-dynamics is studied, as a sample of application of the principle to a quite large class of problems. This work is a far-reaching "evolution" of the same author's preprint math.QA/9912186: the present paper is entirely self-contained, is more general from the mathematical point of view, and contains additional examples. WARNING: This preprint has been overtaken by a new, deeply enhanced and improved version, available as { math.QA/0303019}; the interested reader is kindly asked to refer to that new preprint.
|
[
{
"name": "Fabio Gavarini",
"orcid": null
}
] |
[
"math.QA"
] |
math.QA
|
Mathematics
|
2012-10-04
|
2012-10-08
| null | null |
This paper has been withdrawn by the author because it is replaced by a far-reaching "evolution", namely preprint arXiv:math/0303019 (2003)
|
arXiv License
|
XML-ArXiv-OAI
|
The "quantum duality principle" states that a quantisation of a Lie bialgebra provides also a quantisation of the dual formal Poisson group and, conversely, a quantisation of a formal Poisson group yields a quantisation of the dual Lie bialgebra as well. We extend this to a much more general result: namely, given any principal ideal domain R, for each prime h in R we establish sort of an "inner" Galois' correspondence on the category HA of torsionless Hopf algebras over R, via the definition of two functors (from HA to itself) such that the image of the first, resp. of the second, is the full subcategory of those Hopf algebras which are commutative, resp. cocommutative, modulo h (i.e. they are "quantum function algebras" (=QFA), resp. "quantum universal enveloping algebras" (=QUEA), at h). In particular we provide a machine to get two quantum groups - a QFA and a QUEA - out of any Hopf algebra H over a field k: just plug in a parameter x and apply the functors to H[x] for h = x. Several relevant examples are studied in full detail: the trivial quantisations, the semisimple groups, the Euclidean group, the Heisenberg group, and the Kostant-Kirillov structure on any Lie algebra; furthermore, an interesting application to renormalisation theory in quantum electro-dynamics is studied, as a sample of application of the principle to a quite large class of problems. This work is a far-reaching "evolution" of the same author's preprint math.QA/9912186: the present paper is entirely self-contained, is more general from the mathematical point of view, and contains additional examples. WARNING: This preprint has been overtaken by a new, deeply enhanced and improved version, available as { math.QA/0303019}; the interested reader is kindly asked to refer to that new preprint.
|
[
"The \"quantum duality principle\" states that a quantisation of a Lie bialgebra provides also a quantisation of the dual formal Poisson group and, conversely, a quantisation of a formal Poisson group yields a quantisation of the dual Lie bialgebra as well",
"We extend this to a much more general result: namely, given any principal ideal domain R, for each prime h in R we establish sort of an \"inner\" Galois' correspondence on the category HA of torsionless Hopf algebras over R, via the definition of two functors (from HA to itself) such that the image of the first, resp",
"of the second, is the full subcategory of those Hopf algebras which are commutative, resp",
"cocommutative, modulo h (i",
"they are \"quantum function algebras\" (=QFA), resp",
"\"quantum universal enveloping algebras\" (=QUEA), at h)",
"In particular we provide a machine to get two quantum groups - a QFA and a QUEA - out of any Hopf algebra H over a field k: just plug in a parameter x and apply the functors to H[x] for h = x",
"Several relevant examples are studied in full detail: the trivial quantisations, the semisimple groups, the Euclidean group, the Heisenberg group, and the Kostant-Kirillov structure on any Lie algebra; furthermore, an interesting application to renormalisation theory in quantum electro-dynamics is studied, as a sample of application of the principle to a quite large class of problems",
"This work is a far-reaching \"evolution\" of the same author's preprint math",
"QA/9912186: the present paper is entirely self-contained, is more general from the mathematical point of view, and contains additional examples",
"WARNING: This preprint has been overtaken by a new, deeply enhanced and improved version, available as { math",
"QA/0303019}; the interested reader is kindly asked to refer to that new preprint"
] | 12
|
[] | 0
| false
|
[] |
[] | 379
|
Title: The global quantum duality principle: theory, examples, applications
Categories: math.QA
Abstract: The "quantum duality principle" states that a quantisation of a Lie bialgebra provides also a quantisation of the dual formal Poisson group and, conversely, a quantisation of a formal Poisson group yields a quantisation of the dual Lie bialgebra as well. We extend this to a much more general result: namely, given any principal ideal domain R, for each prime h in R we establish sort of an "inner" Galois' correspondence on the category HA of torsionless Hopf algebras over R, via the definition of two functors (from HA to itself) such that the image of the first, resp. of the second, is the full subcategory of those Hopf algebras which are commutative, resp. cocommutative, modulo h (i.e. they are "quantum function algebras" (=QFA), resp. "quantum universal enveloping algebras" (=QUEA), at h). In particular we provide a machine to get two quantum groups - a QFA and a QUEA - out of any Hopf algebra H over a field k: just plug in a parameter x and apply the functors to H[x] for h = x. Several relevant examples are studied in full detail: the trivial quantisations, the semisimple groups, the Euclidean group, the Heisenberg group, and the Kostant-Kirillov structure on any Lie algebra; furthermore, an interesting application to renormalisation theory in quantum electro-dynamics is studied, as a sample of application of the principle to a quite large class of problems. This work is a far-reaching "evolution" of the same author's preprint math.QA/9912186: the present paper is entirely self-contained, is more general from the mathematical point of view, and contains additional examples. WARNING: This preprint has been overtaken by a new, deeply enhanced and improved version, available as { math.QA/0303019}; the interested reader is kindly asked to refer to that new preprint.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:physics/9809038
| 1
|
Dynamics of Fabry-Perot resonators with suspended mirrors. I. Nonlinear coupled oscillators
|
The dynamics of Fabry-Perot cavity with suspended mirrors is described. The suspended mirrors are nonlinear oscillators interacting with each other through the laser circulating in the cavity. The degrees of freedom decouple in normal coordinates, which are the position of the center of mass and the length of the cavity. We introduce two parameters and study how the dynamics changes with respect to these parameters. The first parameter specifies how strong the radiation pressure is. It determines whether the cavity is multistable or not. The second parameter is the control parameter, which determines location of the cavity equilibrium states. The equilibrium state shows hysteresis if the control parameter varies within a wide range. We analyze stability of the equilibrium states and identify the instability region. The instability is explained in terms of the effective potential: the stable states correspond to local minima of the effective potential and unstable states correspond to local maxima. The minima of the effective potential defines the resonant frequencies for the oscillations of the cavity length. We find the frequencies, and analyze how to tune them. Multistability of the cavity with a feedback control system is analyzed in terms of the servo potential. The results obtained in this paper are general and apply to all Fabry-Perot cavities with suspended mirrors.
|
[
{
"name": "M. Rakhmanov",
"orcid": null
},
{
"name": "A. Arodzero",
"orcid": null
}
] |
[
"physics.optics"
] |
physics.optics
|
Physics
|
1998-09-26
|
2009-12-01
| null | null |
LaTeX 2e, 39 pages, 14 figures
|
arXiv License
|
XML-ArXiv-OAI
|
The dynamics of Fabry-Perot cavity with suspended mirrors is described. The suspended mirrors are nonlinear oscillators interacting with each other through the laser circulating in the cavity. The degrees of freedom decouple in normal coordinates, which are the position of the center of mass and the length of the cavity. We introduce two parameters and study how the dynamics changes with respect to these parameters. The first parameter specifies how strong the radiation pressure is. It determines whether the cavity is multistable or not. The second parameter is the control parameter, which determines location of the cavity equilibrium states. The equilibrium state shows hysteresis if the control parameter varies within a wide range. We analyze stability of the equilibrium states and identify the instability region. The instability is explained in terms of the effective potential: the stable states correspond to local minima of the effective potential and unstable states correspond to local maxima. The minima of the effective potential defines the resonant frequencies for the oscillations of the cavity length. We find the frequencies, and analyze how to tune them. Multistability of the cavity with a feedback control system is analyzed in terms of the servo potential. The results obtained in this paper are general and apply to all Fabry-Perot cavities with suspended mirrors.
|
[
"The dynamics of Fabry-Perot cavity with suspended mirrors is described",
"The suspended mirrors are nonlinear oscillators interacting with each other through the laser circulating in the cavity",
"The degrees of freedom decouple in normal coordinates, which are the position of the center of mass and the length of the cavity",
"We introduce two parameters and study how the dynamics changes with respect to these parameters",
"The first parameter specifies how strong the radiation pressure is",
"It determines whether the cavity is multistable or not",
"The second parameter is the control parameter, which determines location of the cavity equilibrium states",
"The equilibrium state shows hysteresis if the control parameter varies within a wide range",
"We analyze stability of the equilibrium states and identify the instability region",
"The instability is explained in terms of the effective potential: the stable states correspond to local minima of the effective potential and unstable states correspond to local maxima",
"The minima of the effective potential defines the resonant frequencies for the oscillations of the cavity length",
"We find the frequencies, and analyze how to tune them",
"Multistability of the cavity with a feedback control system is analyzed in terms of the servo potential",
"The results obtained in this paper are general and apply to all Fabry-Perot cavities with suspended mirrors"
] | 14
|
[] | 0
| false
|
[] |
[] | 278
|
Title: Dynamics of Fabry-Perot resonators with suspended mirrors. I. Nonlinear coupled oscillators
Categories: physics.optics
Abstract: The dynamics of Fabry-Perot cavity with suspended mirrors is described. The suspended mirrors are nonlinear oscillators interacting with each other through the laser circulating in the cavity. The degrees of freedom decouple in normal coordinates, which are the position of the center of mass and the length of the cavity. We introduce two parameters and study how the dynamics changes with respect to these parameters. The first parameter specifies how strong the radiation pressure is. It determines whether the cavity is multistable or not. The second parameter is the control parameter, which determines location of the cavity equilibrium states. The equilibrium state shows hysteresis if the control parameter varies within a wide range. We analyze stability of the equilibrium states and identify the instability region. The instability is explained in terms of the effective potential: the stable states correspond to local minima of the effective potential and unstable states correspond to local maxima. The minima of the effective potential defines the resonant frequencies for the oscillations of the cavity length. We find the frequencies, and analyze how to tune them. Multistability of the cavity with a feedback control system is analyzed in terms of the servo potential. The results obtained in this paper are general and apply to all Fabry-Perot cavities with suspended mirrors.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1205.3000
| 1
|
Scale invariance of entanglement dynamics in Grover's quantum search algorithm
|
We calculate the amount of entanglement of the multiqubit quantum states employed in the Grover algorithm, by following its dynamics at each step of the computation. We show that genuine multipartite entanglement is always present. Remarkably, the dynamics of any type of entanglement as well as of genuine multipartite entanglement is independent of the number n of qubits for large n, thus exhibiting a scale invariance property. We compare this result with the entanglement dynamics induced by a fixed-point quantum search algorithm. We also investigate criteria for efficient simulatability in the context of Grover's algorithm.
|
[
{
"name": "M. Rossi",
"orcid": null
},
{
"name": "D. Bruß",
"orcid": null
},
{
"name": "C. Macchiavello",
"orcid": null
}
] |
[
"quant-ph"
] |
quant-ph
|
Other
|
2013-02-25
|
2013-02-26
|
10.1103/PhysRevA.87.022331
|
Phys. Rev. A 87, 022331 (2013)
|
5 pages, 4 figures, significantly improved version
|
arXiv License
|
XML-ArXiv-OAI
|
We calculate the amount of entanglement of the multiqubit quantum states employed in the Grover algorithm, by following its dynamics at each step of the computation. We show that genuine multipartite entanglement is always present. Remarkably, the dynamics of any type of entanglement as well as of genuine multipartite entanglement is independent of the number n of qubits for large n, thus exhibiting a scale invariance property. We compare this result with the entanglement dynamics induced by a fixed-point quantum search algorithm. We also investigate criteria for efficient simulatability in the context of Grover's algorithm.
|
[
"We calculate the amount of entanglement of the multiqubit quantum states employed in the Grover algorithm, by following its dynamics at each step of the computation",
"We show that genuine multipartite entanglement is always present",
"Remarkably, the dynamics of any type of entanglement as well as of genuine multipartite entanglement is independent of the number n of qubits for large n, thus exhibiting a scale invariance property",
"We compare this result with the entanglement dynamics induced by a fixed-point quantum search algorithm",
"We also investigate criteria for efficient simulatability in the context of Grover's algorithm"
] | 5
|
[] | 0
| false
|
[] |
[] | 123
|
Title: Scale invariance of entanglement dynamics in Grover's quantum search algorithm
Categories: quant-ph
Abstract: We calculate the amount of entanglement of the multiqubit quantum states employed in the Grover algorithm, by following its dynamics at each step of the computation. We show that genuine multipartite entanglement is always present. Remarkably, the dynamics of any type of entanglement as well as of genuine multipartite entanglement is independent of the number n of qubits for large n, thus exhibiting a scale invariance property. We compare this result with the entanglement dynamics induced by a fixed-point quantum search algorithm. We also investigate criteria for efficient simulatability in the context of Grover's algorithm.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1102.2352
| 1
|
Simulating Flaring Events in Complex Active Regions Driven by Observed Magnetograms
|
We interpret solar flares as events originating from active regions that have reached the Self Organized Critical state, by using a refined Cellular Automaton model with initial conditions derived from observations. Aims: We investigate whether the system, with its imposed physical elements,reaches a Self Organized Critical state and whether well-known statistical properties of flares, such as scaling laws observed in the distribution functions of characteristic parameters, are reproduced after this state has been reached. Results: Our results show that Self Organized Criticality is indeed reached when applying specific loading and relaxation rules. Power law indices obtained from the distribution functions of the modeled flaring events are in good agreement with observations. Single power laws (peak and total flare energy) as well as power laws with exponential cutoff and double power laws (flare duration) are obtained. The results are also compared with observational X-ray data from GOES satellite for our active-region sample. Conclusions: We conclude that well-known statistical properties of flares are reproduced after the system has reached Self Organized Criticality. A significant enhancement of our refined Cellular Automaton model is that it commences the simulation from observed vector magnetograms, thus facilitating energy calculation in physical units. The model described in this study remains consistent with fundamental physical requirements, and imposes physically meaningful driving and redistribution rules.
|
[
{
"name": "M. Dimitropoulou",
"orcid": null
},
{
"name": "H. Isliker",
"orcid": null
},
{
"name": "L. Vlahos",
"orcid": null
},
{
"name": "M. K. Georgoulis",
"orcid": null
}
] |
[
"astro-ph.SR"
] |
astro-ph.SR
|
Other
|
2011-02-11
|
2015-05-27
|
10.1051/0004-6361/201015569
| null |
14 pages; 12 figures; 6 tables - A&A, in press
|
arXiv License
|
XML-ArXiv-OAI
|
We interpret solar flares as events originating from active regions that have reached the Self Organized Critical state, by using a refined Cellular Automaton model with initial conditions derived from observations. Aims: We investigate whether the system, with its imposed physical elements,reaches a Self Organized Critical state and whether well-known statistical properties of flares, such as scaling laws observed in the distribution functions of characteristic parameters, are reproduced after this state has been reached. Results: Our results show that Self Organized Criticality is indeed reached when applying specific loading and relaxation rules. Power law indices obtained from the distribution functions of the modeled flaring events are in good agreement with observations. Single power laws (peak and total flare energy) as well as power laws with exponential cutoff and double power laws (flare duration) are obtained. The results are also compared with observational X-ray data from GOES satellite for our active-region sample. Conclusions: We conclude that well-known statistical properties of flares are reproduced after the system has reached Self Organized Criticality. A significant enhancement of our refined Cellular Automaton model is that it commences the simulation from observed vector magnetograms, thus facilitating energy calculation in physical units. The model described in this study remains consistent with fundamental physical requirements, and imposes physically meaningful driving and redistribution rules.
|
[
"We interpret solar flares as events originating from active regions that have reached the Self Organized Critical state, by using a refined Cellular Automaton model with initial conditions derived from observations",
"Aims: We investigate whether the system, with its imposed physical elements,reaches a Self Organized Critical state and whether well-known statistical properties of flares, such as scaling laws observed in the distribution functions of characteristic parameters, are reproduced after this state has been reached",
"Results: Our results show that Self Organized Criticality is indeed reached when applying specific loading and relaxation rules",
"Power law indices obtained from the distribution functions of the modeled flaring events are in good agreement with observations",
"Single power laws (peak and total flare energy) as well as power laws with exponential cutoff and double power laws (flare duration) are obtained",
"The results are also compared with observational X-ray data from GOES satellite for our active-region sample",
"Conclusions: We conclude that well-known statistical properties of flares are reproduced after the system has reached Self Organized Criticality",
"A significant enhancement of our refined Cellular Automaton model is that it commences the simulation from observed vector magnetograms, thus facilitating energy calculation in physical units",
"The model described in this study remains consistent with fundamental physical requirements, and imposes physically meaningful driving and redistribution rules"
] | 9
|
[] | 0
| false
|
[] |
[] | 280
|
Title: Simulating Flaring Events in Complex Active Regions Driven by Observed Magnetograms
Categories: astro-ph.SR
Abstract: We interpret solar flares as events originating from active regions that have reached the Self Organized Critical state, by using a refined Cellular Automaton model with initial conditions derived from observations. Aims: We investigate whether the system, with its imposed physical elements,reaches a Self Organized Critical state and whether well-known statistical properties of flares, such as scaling laws observed in the distribution functions of characteristic parameters, are reproduced after this state has been reached. Results: Our results show that Self Organized Criticality is indeed reached when applying specific loading and relaxation rules. Power law indices obtained from the distribution functions of the modeled flaring events are in good agreement with observations. Single power laws (peak and total flare energy) as well as power laws with exponential cutoff and double power laws (flare duration) are obtained. The results are also compared with observational X-ray data from GOES satellite for our active-region sample. Conclusions: We conclude that well-known statistical properties of flares are reproduced after the system has reached Self Organized Criticality. A significant enhancement of our refined Cellular Automaton model is that it commences the simulation from observed vector magnetograms, thus facilitating energy calculation in physical units. The model described in this study remains consistent with fundamental physical requirements, and imposes physically meaningful driving and redistribution rules.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1107.4929
| 1
|
Some Non-Classical Approaches to the Branderburger-Keisler Paradox
|
In this paper, we discuss a well-known self-referential paradox in foundational game theory, the Brandenburger - Keisler paradox. We approach the paradox from two different perspectives: non-well-founded set theory and paraconsistent logic. We show that the paradox persists in both frameworks for category theoretical reasons, but, with different properties.
|
[
{
"name": "Can Baskent",
"orcid": null
}
] |
[
"cs.GT",
"cs.LO"
] |
cs.GT
|
Computer Science
|
2011-07-25
|
2011-07-26
| null | null | null |
CC BY-NC
|
XML-ArXiv-OAI
|
In this paper, we discuss a well-known self-referential paradox in foundational game theory, the Brandenburger - Keisler paradox. We approach the paradox from two different perspectives: non-well-founded set theory and paraconsistent logic. We show that the paradox persists in both frameworks for category theoretical reasons, but, with different properties.
|
[
"In this paper, we discuss a well-known self-referential paradox in foundational game theory, the Brandenburger - Keisler paradox",
"We approach the paradox from two different perspectives: non-well-founded set theory and paraconsistent logic",
"We show that the paradox persists in both frameworks for category theoretical reasons, but, with different properties"
] | 3
|
[] | 0
| false
|
[] |
[] | 63
|
Title: Some Non-Classical Approaches to the Branderburger-Keisler Paradox
Categories: cs.GT, cs.LO
Abstract: In this paper, we discuss a well-known self-referential paradox in foundational game theory, the Brandenburger - Keisler paradox. We approach the paradox from two different perspectives: non-well-founded set theory and paraconsistent logic. We show that the paradox persists in both frameworks for category theoretical reasons, but, with different properties.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1506.05472
| 1
|
The initial conditions of stellar protocluster formation. II. A catalogue of starless and protostellar clumps embedded in IRDCs in the Galactic longitude range 15<l<55
|
We present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic Plane (b10^4$ M_sun in mass and up to 10^5 L_sun in luminosity. The mass-radius distribution shows that almost 30% of the starless clumps identified in this survey could form high-mass stars, however these massive clumps are confined in only ~4% of the IRDCs. Assuming a minimum mass surface density threshold for the formation of high-mass stars, the comparison of the numbers of massive starless clumps and those already containing embedded sources suggests an upper limit lifetime for the starless phase of 10^5 years for clumps with a mass M>500 M_sun.
|
[
{
"name": "A. Traficante",
"orcid": null
},
{
"name": "G. A. Fuller",
"orcid": null
},
{
"name": "N. Peretto",
"orcid": null
},
{
"name": "J. E. Pineda",
"orcid": null
},
{
"name": "S. Molinari",
"orcid": null
}
] |
[
"astro-ph.SR",
"astro-ph.GA"
] |
astro-ph.SR
|
Other
|
2015-06-17
|
2015-06-19
| null | null |
accepted for publication in MNRAS. Online catalogues available soon, please contact the authors if interested
|
arXiv License
|
XML-ArXiv-OAI
|
We present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic Plane (b10^4$ M_sun in mass and up to 10^5 L_sun in luminosity. The mass-radius distribution shows that almost 30% of the starless clumps identified in this survey could form high-mass stars, however these massive clumps are confined in only ~4% of the IRDCs. Assuming a minimum mass surface density threshold for the formation of high-mass stars, the comparison of the numbers of massive starless clumps and those already containing embedded sources suggests an upper limit lifetime for the starless phase of 10^5 years for clumps with a mass M>500 M_sun.
|
[
"We present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic Plane (b10^4$ M_sun in mass and up to 10^5 L_sun in luminosity",
"The mass-radius distribution shows that almost 30% of the starless clumps identified in this survey could form high-mass stars, however these massive clumps are confined in only ~4% of the IRDCs",
"Assuming a minimum mass surface density threshold for the formation of high-mass stars, the comparison of the numbers of massive starless clumps and those already containing embedded sources suggests an upper limit lifetime for the starless phase of 10^5 years for clumps with a mass M>500 M_sun"
] | 3
|
[] | 0
| false
|
[] |
[] | 149
|
Title: The initial conditions of stellar protocluster formation. II. A catalogue of starless and protostellar clumps embedded in IRDCs in the Galactic longitude range 15<l<55
Categories: astro-ph.SR, astro-ph.GA
Abstract: We present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic Plane (b10^4$ M_sun in mass and up to 10^5 L_sun in luminosity. The mass-radius distribution shows that almost 30% of the starless clumps identified in this survey could form high-mass stars, however these massive clumps are confined in only ~4% of the IRDCs. Assuming a minimum mass surface density threshold for the formation of high-mass stars, the comparison of the numbers of massive starless clumps and those already containing embedded sources suggests an upper limit lifetime for the starless phase of 10^5 years for clumps with a mass M>500 M_sun.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1407.3327
| 1
|
Minimum Cost Input/Output Design for Large Scale Linear Structural Systems
|
In this paper, we provide optimal solutions to two different (but related) input/output design problems involving large-scale linear dynamical systems, where the cost associated to each directly actuated/measured state variable can take different values, but is independent of the labeled input/output variable. Under these conditions, we first aim to determine and characterize the input/output placement that incurs in the minimum cost while ensuring that the resulting placement achieves structural controllability/observability. Further, we address a constrained variant of the above problem, in which we seek to determine the minimum cost placement configuration, among all possible input/output placement configurations that ensures structural controllability/observability, with the lowest number of directly actuated/measured state variables. We show that both problems can be solved efficiently, i.e., using algorithms with polynomial time complexity in the number of the state variables. Finally, we illustrate the obtained results with an example.
|
[
{
"name": "Sergio Pequito",
"orcid": null
},
{
"name": "A. Pedro Aguiar",
"orcid": null
},
{
"name": "Soummya Kar",
"orcid": null
}
] |
[
"math.OC"
] |
math.OC
|
Mathematics
|
2015-01-29
|
2015-02-02
| null | null |
24 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
In this paper, we provide optimal solutions to two different (but related) input/output design problems involving large-scale linear dynamical systems, where the cost associated to each directly actuated/measured state variable can take different values, but is independent of the labeled input/output variable. Under these conditions, we first aim to determine and characterize the input/output placement that incurs in the minimum cost while ensuring that the resulting placement achieves structural controllability/observability. Further, we address a constrained variant of the above problem, in which we seek to determine the minimum cost placement configuration, among all possible input/output placement configurations that ensures structural controllability/observability, with the lowest number of directly actuated/measured state variables. We show that both problems can be solved efficiently, i.e., using algorithms with polynomial time complexity in the number of the state variables. Finally, we illustrate the obtained results with an example.
|
[
"In this paper, we provide optimal solutions to two different (but related) input/output design problems involving large-scale linear dynamical systems, where the cost associated to each directly actuated/measured state variable can take different values, but is independent of the labeled input/output variable",
"Under these conditions, we first aim to determine and characterize the input/output placement that incurs in the minimum cost while ensuring that the resulting placement achieves structural controllability/observability",
"Further, we address a constrained variant of the above problem, in which we seek to determine the minimum cost placement configuration, among all possible input/output placement configurations that ensures structural controllability/observability, with the lowest number of directly actuated/measured state variables",
"We show that both problems can be solved efficiently, i",
", using algorithms with polynomial time complexity in the number of the state variables",
"Finally, we illustrate the obtained results with an example"
] | 6
|
[] | 0
| false
|
[] |
[] | 184
|
Title: Minimum Cost Input/Output Design for Large Scale Linear Structural Systems
Categories: math.OC
Abstract: In this paper, we provide optimal solutions to two different (but related) input/output design problems involving large-scale linear dynamical systems, where the cost associated to each directly actuated/measured state variable can take different values, but is independent of the labeled input/output variable. Under these conditions, we first aim to determine and characterize the input/output placement that incurs in the minimum cost while ensuring that the resulting placement achieves structural controllability/observability. Further, we address a constrained variant of the above problem, in which we seek to determine the minimum cost placement configuration, among all possible input/output placement configurations that ensures structural controllability/observability, with the lowest number of directly actuated/measured state variables. We show that both problems can be solved efficiently, i.e., using algorithms with polynomial time complexity in the number of the state variables. Finally, we illustrate the obtained results with an example.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0805.3246
| 1
|
On a Monge-Ampère type equation in the Cegrell class $\mathcal{E}_χ$
|
In this paper we prove an existence and uniqueness result for a Monge-Ampère type equation in the Cegrell class .
|
[
{
"name": "Rafał Czyż",
"orcid": null
}
] |
[
"math.CV"
] |
math.CV
|
Mathematics
|
2009-02-24
|
2009-12-01
| null | null |
6 pages
|
arXiv License
|
XML-ArXiv-OAI
|
In this paper we prove an existence and uniqueness result for a Monge-Ampère type equation in the Cegrell class .
|
[
"In this paper we prove an existence and uniqueness result for a Monge-Ampère type equation in the Cegrell class"
] | 1
|
[
"\\mathcal{E}_χ"
] | 1
| true
|
[] |
[] | 26
|
Title: On a Monge-Ampère type equation in the Cegrell class $\mathcal{E}_χ$
Categories: math.CV
Abstract: In this paper we prove an existence and uniqueness result for a Monge-Ampère type equation in the Cegrell class .
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:math/9911045
| 1
|
On the delbar-equation in a Banach space
|
We show that on the unit ball of a certain separable Banach space there is a smooth delbar-closed (0,1)-form which is not locally delbar-exact. Further, the Dolbeault isomorphism theorem does not generalize to arbitrary Banach spaces. Lastly, the Newlander-Nirenberg theorem does not generalize to arbitrary smooth integrable almost complex Banach manifolds.
|
[
{
"name": "Imre Patyi",
"orcid": null
}
] |
[
"math.CV"
] |
math.CV
|
Mathematics
|
1999-11-08
|
2009-11-30
| null | null |
13 pages, AmS-TeX, to appear in Bull. Soc. Math. France
|
arXiv License
|
XML-ArXiv-OAI
|
We show that on the unit ball of a certain separable Banach space there is a smooth delbar-closed (0,1)-form which is not locally delbar-exact. Further, the Dolbeault isomorphism theorem does not generalize to arbitrary Banach spaces. Lastly, the Newlander-Nirenberg theorem does not generalize to arbitrary smooth integrable almost complex Banach manifolds.
|
[
"We show that on the unit ball of a certain separable Banach space there is a smooth delbar-closed (0,1)-form which is not locally delbar-exact",
"Further, the Dolbeault isomorphism theorem does not generalize to arbitrary Banach spaces",
"Lastly, the Newlander-Nirenberg theorem does not generalize to arbitrary smooth integrable almost complex Banach manifolds"
] | 3
|
[] | 0
| false
|
[] |
[] | 66
|
Title: On the delbar-equation in a Banach space
Categories: math.CV
Abstract: We show that on the unit ball of a certain separable Banach space there is a smooth delbar-closed (0,1)-form which is not locally delbar-exact. Further, the Dolbeault isomorphism theorem does not generalize to arbitrary Banach spaces. Lastly, the Newlander-Nirenberg theorem does not generalize to arbitrary smooth integrable almost complex Banach manifolds.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:math/0310163
| 1
|
A cuspidality criterion for the functorial product on GL(2) x GL(3), with a cohomological application
|
This paper was motivated by a question of Avner Ash, asking if it is possible to construct non-selfdual, non-monomial, cuspidal cohomology classes for suitable congruence subgroups Γof SL(n,). Such a construction, in special examples, has been known for some time for n=3; it is of course impossible for n=2. We show in this paper the existence of many such examples for n=6, which are primitive, by making use of the functorial product on GL(2) x GL(3), which was recently shown to be automorphic by Kim and Shahidi. We establish a general cuspidality criterion for this product, which is essential to the construction. We also show that there exist non-selfdual, monomial (cuspidal) classes for any n=2m > 3, and non-selfdual, non-monomial (but imprimitive) classes for n=4.
|
[
{
"name": "Dinakar Ramakrishnan",
"orcid": null
},
{
"name": "Song Wang",
"orcid": null
}
] |
[
"math.NT"
] |
math.NT
|
Mathematics
|
2003-10-11
|
2009-12-01
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
This paper was motivated by a question of Avner Ash, asking if it is possible to construct non-selfdual, non-monomial, cuspidal cohomology classes for suitable congruence subgroups Γof SL(n,). Such a construction, in special examples, has been known for some time for n=3; it is of course impossible for n=2. We show in this paper the existence of many such examples for n=6, which are primitive, by making use of the functorial product on GL(2) x GL(3), which was recently shown to be automorphic by Kim and Shahidi. We establish a general cuspidality criterion for this product, which is essential to the construction. We also show that there exist non-selfdual, monomial (cuspidal) classes for any n=2m > 3, and non-selfdual, non-monomial (but imprimitive) classes for n=4.
|
[
"This paper was motivated by a question of Avner Ash, asking if it is possible to construct non-selfdual, non-monomial, cuspidal cohomology classes for suitable congruence subgroups Γof SL(n,)",
"Such a construction, in special examples, has been known for some time for n=3; it is of course impossible for n=2",
"We show in this paper the existence of many such examples for n=6, which are primitive, by making use of the functorial product on GL(2) x GL(3), which was recently shown to be automorphic by Kim and Shahidi",
"We establish a general cuspidality criterion for this product, which is essential to the construction",
"We also show that there exist non-selfdual, monomial (cuspidal) classes for any n=2m > 3, and non-selfdual, non-monomial (but imprimitive) classes for n=4"
] | 5
|
[] | 0
| false
|
[] |
[] | 162
|
Title: A cuspidality criterion for the functorial product on GL(2) x GL(3), with a cohomological application
Categories: math.NT
Abstract: This paper was motivated by a question of Avner Ash, asking if it is possible to construct non-selfdual, non-monomial, cuspidal cohomology classes for suitable congruence subgroups Γof SL(n,). Such a construction, in special examples, has been known for some time for n=3; it is of course impossible for n=2. We show in this paper the existence of many such examples for n=6, which are primitive, by making use of the functorial product on GL(2) x GL(3), which was recently shown to be automorphic by Kim and Shahidi. We establish a general cuspidality criterion for this product, which is essential to the construction. We also show that there exist non-selfdual, monomial (cuspidal) classes for any n=2m > 3, and non-selfdual, non-monomial (but imprimitive) classes for n=4.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:nucl-th/0612021
| 1
|
Neutron stars and quark matter
|
Recent observations of neutron star masses close to the maximum predicted by nucleonic equations of state begin to challenge our understanding of dense matter in neutron stars, and constrain the possible presence of quark matter in their deep interiors.
|
[
{
"name": "Gordon Baym",
"orcid": null
}
] |
[
"nucl-th",
"astro-ph",
"hep-ph"
] |
nucl-th
|
Other
|
2006-12-05
|
2009-12-01
|
10.1063/1.2714340
|
AIPConf.Proc.892:8-14,2007
|
To be published in the proceedings of Quark Confinement and the Hadron Spectrum VII, Sept. 2006, Ponta Delgada, Azores. 7 pages, 3 figures, aiproc
|
arXiv License
|
XML-ArXiv-OAI
|
Recent observations of neutron star masses close to the maximum predicted by nucleonic equations of state begin to challenge our understanding of dense matter in neutron stars, and constrain the possible presence of quark matter in their deep interiors.
|
[
"Recent observations of neutron star masses close to the maximum predicted by nucleonic equations of state begin to challenge our understanding of dense matter in neutron stars, and constrain the possible presence of quark matter in their deep interiors"
] | 1
|
[] | 0
| false
|
[] |
[] | 50
|
Title: Neutron stars and quark matter
Categories: nucl-th, astro-ph, hep-ph
Abstract: Recent observations of neutron star masses close to the maximum predicted by nucleonic equations of state begin to challenge our understanding of dense matter in neutron stars, and constrain the possible presence of quark matter in their deep interiors.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1207.4029
| 1
|
A Metric Approach to Elastic Reformations
|
We study a variational framework to compare shapes, modeled as Radon measures on R^N, in order to quantify how they differ from isometric copies. To this purpose we discuss some notions of weak deformations termed reformations as well as integral functionals having some kind of isometries as minimizers. The approach pursued is based on the notion of pointwise Lipschitz constant leading to a space metric framework. In particular, to compare general shapes, we study this reformation problem by using the notion of transport plan and of Wasserstein distances as in optimal mass transportation theory.
|
[
{
"name": "L. Granieri",
"orcid": null
},
{
"name": "F. Maddalena",
"orcid": null
}
] |
[
"math.OC"
] |
math.OC
|
Mathematics
|
2013-07-28
|
2013-07-30
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
We study a variational framework to compare shapes, modeled as Radon measures on R^N, in order to quantify how they differ from isometric copies. To this purpose we discuss some notions of weak deformations termed reformations as well as integral functionals having some kind of isometries as minimizers. The approach pursued is based on the notion of pointwise Lipschitz constant leading to a space metric framework. In particular, to compare general shapes, we study this reformation problem by using the notion of transport plan and of Wasserstein distances as in optimal mass transportation theory.
|
[
"We study a variational framework to compare shapes, modeled as Radon measures on R^N, in order to quantify how they differ from isometric copies",
"To this purpose we discuss some notions of weak deformations termed reformations as well as integral functionals having some kind of isometries as minimizers",
"The approach pursued is based on the notion of pointwise Lipschitz constant leading to a space metric framework",
"In particular, to compare general shapes, we study this reformation problem by using the notion of transport plan and of Wasserstein distances as in optimal mass transportation theory"
] | 4
|
[] | 0
| false
|
[] |
[] | 122
|
Title: A Metric Approach to Elastic Reformations
Categories: math.OC
Abstract: We study a variational framework to compare shapes, modeled as Radon measures on R^N, in order to quantify how they differ from isometric copies. To this purpose we discuss some notions of weak deformations termed reformations as well as integral functionals having some kind of isometries as minimizers. The approach pursued is based on the notion of pointwise Lipschitz constant leading to a space metric framework. In particular, to compare general shapes, we study this reformation problem by using the notion of transport plan and of Wasserstein distances as in optimal mass transportation theory.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0512032
| 1
|
Star Cluster Evolution with Primordial Binaries
|
Observations and theoretical work suggest that globular clusters may be born with initially very large binary fractions. We present first results from our newly modified Monte-Carlo cluster evolution code, which treats binary interactions exactly via direct N-body integration. It is shown that binary scattering interactions generate significantly less energy than predicted by the recipes that have been used in the past to model them in approximate cluster evolution methods. The new result that the cores of globular clusters in the long-lived binary-burning phase are smaller than previously predicted weakens the agreement with observations, thus implying that more than simply stellar dynamics is at work in shaping the globular clusters we observe today.
|
[
{
"name": "John M. Fregeau",
"orcid": null
},
{
"name": "M. Atakan Gurkan",
"orcid": null
},
{
"name": "Frederic A. Rasio",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2005-12-01
|
2009-12-01
| null | null |
4 pages, 3 figures, to appear in Few-Body Problem, Annales Universitatis Turkuensis, C. Flynn, ed
|
arXiv License
|
XML-ArXiv-OAI
|
Observations and theoretical work suggest that globular clusters may be born with initially very large binary fractions. We present first results from our newly modified Monte-Carlo cluster evolution code, which treats binary interactions exactly via direct N-body integration. It is shown that binary scattering interactions generate significantly less energy than predicted by the recipes that have been used in the past to model them in approximate cluster evolution methods. The new result that the cores of globular clusters in the long-lived binary-burning phase are smaller than previously predicted weakens the agreement with observations, thus implying that more than simply stellar dynamics is at work in shaping the globular clusters we observe today.
|
[
"Observations and theoretical work suggest that globular clusters may be born with initially very large binary fractions",
"We present first results from our newly modified Monte-Carlo cluster evolution code, which treats binary interactions exactly via direct N-body integration",
"It is shown that binary scattering interactions generate significantly less energy than predicted by the recipes that have been used in the past to model them in approximate cluster evolution methods",
"The new result that the cores of globular clusters in the long-lived binary-burning phase are smaller than previously predicted weakens the agreement with observations, thus implying that more than simply stellar dynamics is at work in shaping the globular clusters we observe today"
] | 4
|
[] | 0
| false
|
[] |
[] | 145
|
Title: Star Cluster Evolution with Primordial Binaries
Categories: astro-ph
Abstract: Observations and theoretical work suggest that globular clusters may be born with initially very large binary fractions. We present first results from our newly modified Monte-Carlo cluster evolution code, which treats binary interactions exactly via direct N-body integration. It is shown that binary scattering interactions generate significantly less energy than predicted by the recipes that have been used in the past to model them in approximate cluster evolution methods. The new result that the cores of globular clusters in the long-lived binary-burning phase are smaller than previously predicted weakens the agreement with observations, thus implying that more than simply stellar dynamics is at work in shaping the globular clusters we observe today.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0804.1293
| 1
|
Intuitive understanding of non-gaussianity in ekpyrotic and cyclic models
|
It has been pointed out by several groups that ekpyrotic and cyclic models generate significant non-gaussianity. In this paper, we present a physically intuitive, semi-analytic estimate of the bispectrum. We show that, in all such models, there is an intrinsic contribution to the non-gaussianity parameter f_{NL} that is determined by the geometric mean of the equation of state w_{ek} during the ekpyrotic phase and w_{c} during the phase that curvature perturbations are generated and whose value is O(100) or more times the intrinsic value predicted by simple slow-roll inflationary models, f_{NL}^{intrinsic} = O(0.1). Other contributions to f_{NL}, which we also estimate, can increase |f_{NL}| but are unlikely to decrease it significantly, making non-gaussianity a useful test of these models. Furthermore, we discuss a predicted correlation between the non-gaussianity and scalar spectral index that sharpens the test.
|
[
{
"name": "Jean-Luc Lehners",
"orcid": null
},
{
"name": "Paul J. Steinhardt",
"orcid": null
}
] |
[
"hep-th",
"astro-ph"
] |
hep-th
|
Other
|
2009-06-02
|
2014-11-18
|
10.1103/PhysRevD.78.023506 10.1103/PhysRevD.79.129902
|
Phys.Rev.D78:023506,2008; Erratum-ibid.D79:129902,2009
|
10 pages, 4 figures. Sign error corrected and results generalized, conclusions unchanged
|
arXiv License
|
XML-ArXiv-OAI
|
It has been pointed out by several groups that ekpyrotic and cyclic models generate significant non-gaussianity. In this paper, we present a physically intuitive, semi-analytic estimate of the bispectrum. We show that, in all such models, there is an intrinsic contribution to the non-gaussianity parameter f_{NL} that is determined by the geometric mean of the equation of state w_{ek} during the ekpyrotic phase and w_{c} during the phase that curvature perturbations are generated and whose value is O(100) or more times the intrinsic value predicted by simple slow-roll inflationary models, f_{NL}^{intrinsic} = O(0.1). Other contributions to f_{NL}, which we also estimate, can increase |f_{NL}| but are unlikely to decrease it significantly, making non-gaussianity a useful test of these models. Furthermore, we discuss a predicted correlation between the non-gaussianity and scalar spectral index that sharpens the test.
|
[
"It has been pointed out by several groups that ekpyrotic and cyclic models generate significant non-gaussianity",
"In this paper, we present a physically intuitive, semi-analytic estimate of the bispectrum",
"We show that, in all such models, there is an intrinsic contribution to the non-gaussianity parameter f_{NL} that is determined by the geometric mean of the equation of state w_{ek} during the ekpyrotic phase and w_{c} during the phase that curvature perturbations are generated and whose value is O(100) or more times the intrinsic value predicted by simple slow-roll inflationary models, f_{NL}^{intrinsic} = O(0",
"Other contributions to f_{NL}, which we also estimate, can increase |f_{NL}| but are unlikely to decrease it significantly, making non-gaussianity a useful test of these models",
"Furthermore, we discuss a predicted correlation between the non-gaussianity and scalar spectral index that sharpens the test"
] | 5
|
[] | 0
| false
|
[] |
[] | 176
|
Title: Intuitive understanding of non-gaussianity in ekpyrotic and cyclic models
Categories: hep-th, astro-ph
Abstract: It has been pointed out by several groups that ekpyrotic and cyclic models generate significant non-gaussianity. In this paper, we present a physically intuitive, semi-analytic estimate of the bispectrum. We show that, in all such models, there is an intrinsic contribution to the non-gaussianity parameter f_{NL} that is determined by the geometric mean of the equation of state w_{ek} during the ekpyrotic phase and w_{c} during the phase that curvature perturbations are generated and whose value is O(100) or more times the intrinsic value predicted by simple slow-roll inflationary models, f_{NL}^{intrinsic} = O(0.1). Other contributions to f_{NL}, which we also estimate, can increase |f_{NL}| but are unlikely to decrease it significantly, making non-gaussianity a useful test of these models. Furthermore, we discuss a predicted correlation between the non-gaussianity and scalar spectral index that sharpens the test.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/9707313
| 1
|
One-Dimensional Disordered Supersymmetric Quantum Mechanics: A Brief Survey
|
We consider a one-dimensional model of localization based on the Witten Hamiltonian of supersymmetric quantum mechanics. The low energy spectral properties are reviewed and compared with those of other models with off-diagonal disorder. Using recent results on exponential functionals of a Brownian motion we discuss the statistical properties of the ground state wave function and their multifractal behaviour.
|
[
{
"name": "Alain Comtet",
"orcid": null
},
{
"name": "Christophe Texier",
"orcid": null
}
] |
[
"cond-mat"
] |
cond-mat
|
Other
|
2003-12-05
|
2009-11-30
|
10.1007/BFb0105327
|
in "Supersymmetry and Integrable Models", Aratyn et al. (eds), Springer, (1998), p. 313
|
16 pages, LaTeX, contribution to the proceedings of the workshop "Supersymmetry and Integrable Models", version 2: prefactor of eq.(17) corrected
|
arXiv License
|
XML-ArXiv-OAI
|
We consider a one-dimensional model of localization based on the Witten Hamiltonian of supersymmetric quantum mechanics. The low energy spectral properties are reviewed and compared with those of other models with off-diagonal disorder. Using recent results on exponential functionals of a Brownian motion we discuss the statistical properties of the ground state wave function and their multifractal behaviour.
|
[
"We consider a one-dimensional model of localization based on the Witten Hamiltonian of supersymmetric quantum mechanics",
"The low energy spectral properties are reviewed and compared with those of other models with off-diagonal disorder",
"Using recent results on exponential functionals of a Brownian motion we discuss the statistical properties of the ground state wave function and their multifractal behaviour"
] | 3
|
[] | 0
| false
|
[] |
[] | 75
|
Title: One-Dimensional Disordered Supersymmetric Quantum Mechanics: A Brief Survey
Categories: cond-mat
Abstract: We consider a one-dimensional model of localization based on the Witten Hamiltonian of supersymmetric quantum mechanics. The low energy spectral properties are reviewed and compared with those of other models with off-diagonal disorder. Using recent results on exponential functionals of a Brownian motion we discuss the statistical properties of the ground state wave function and their multifractal behaviour.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0208004
| 1
|
Stellar Halo Parameters from 4588 Subdwarfs
|
Using a reduced proper motion discriminator, I obtain a sample of 4588 subdwarfs from the Revised NLTT Catalog of Salim & Gould. The ample statistics and low contamination permit much more precise determinations of halo parameters than has previously been possible. The stellar halo is not moving with respect to the Local Standard of Rest (LSR) in either the vertical or radial direction, up to uncertainties of 2 km/s. This indicates that either the LSR is on a circular orbit or the Sun happens to lie very close to an extremum of the LSR's elliptical orbit. Similarly, tentative detections of vertical proper motion of Sgr A* relative to the LSR are either incorrect or they reflect real physical motion of the central black hole relative to the Galactic potential. The correlation coefficients of the halo velocity ellipsoid, which would reflect any possible misalignment between its principal axes and the cardinal directions of the Galaxy, vanish to within 2%. The halo subdwarf luminosity function peaks at M_V ~ 10.5 with a full width half maximum of about 2.5 mag.
|
[
{
"name": "Andrew Gould",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2002-07-31
|
2009-12-01
|
10.1086/383344
|
Astrophys.J. 583 (2003) 765-775; Erratum-ibid. 607 (2004) 653
|
Submitted to ApJ, 22 pages including 2 figures
|
arXiv License
|
XML-ArXiv-OAI
|
Using a reduced proper motion discriminator, I obtain a sample of 4588 subdwarfs from the Revised NLTT Catalog of Salim & Gould. The ample statistics and low contamination permit much more precise determinations of halo parameters than has previously been possible. The stellar halo is not moving with respect to the Local Standard of Rest (LSR) in either the vertical or radial direction, up to uncertainties of 2 km/s. This indicates that either the LSR is on a circular orbit or the Sun happens to lie very close to an extremum of the LSR's elliptical orbit. Similarly, tentative detections of vertical proper motion of Sgr A* relative to the LSR are either incorrect or they reflect real physical motion of the central black hole relative to the Galactic potential. The correlation coefficients of the halo velocity ellipsoid, which would reflect any possible misalignment between its principal axes and the cardinal directions of the Galaxy, vanish to within 2%. The halo subdwarf luminosity function peaks at M_V ~ 10.5 with a full width half maximum of about 2.5 mag.
|
[
"Using a reduced proper motion discriminator, I obtain a sample of 4588 subdwarfs from the Revised NLTT Catalog of Salim & Gould",
"The ample statistics and low contamination permit much more precise determinations of halo parameters than has previously been possible",
"The stellar halo is not moving with respect to the Local Standard of Rest (LSR) in either the vertical or radial direction, up to uncertainties of 2 km/s",
"This indicates that either the LSR is on a circular orbit or the Sun happens to lie very close to an extremum of the LSR's elliptical orbit",
"Similarly, tentative detections of vertical proper motion of Sgr A* relative to the LSR are either incorrect or they reflect real physical motion of the central black hole relative to the Galactic potential",
"The correlation coefficients of the halo velocity ellipsoid, which would reflect any possible misalignment between its principal axes and the cardinal directions of the Galaxy, vanish to within 2%",
"The halo subdwarf luminosity function peaks at M_V ~ 10",
"5 with a full width half maximum of about 2"
] | 8
|
[] | 0
| false
|
[] |
[] | 231
|
Title: Stellar Halo Parameters from 4588 Subdwarfs
Categories: astro-ph
Abstract: Using a reduced proper motion discriminator, I obtain a sample of 4588 subdwarfs from the Revised NLTT Catalog of Salim & Gould. The ample statistics and low contamination permit much more precise determinations of halo parameters than has previously been possible. The stellar halo is not moving with respect to the Local Standard of Rest (LSR) in either the vertical or radial direction, up to uncertainties of 2 km/s. This indicates that either the LSR is on a circular orbit or the Sun happens to lie very close to an extremum of the LSR's elliptical orbit. Similarly, tentative detections of vertical proper motion of Sgr A* relative to the LSR are either incorrect or they reflect real physical motion of the central black hole relative to the Galactic potential. The correlation coefficients of the halo velocity ellipsoid, which would reflect any possible misalignment between its principal axes and the cardinal directions of the Galaxy, vanish to within 2%. The halo subdwarf luminosity function peaks at M_V ~ 10.5 with a full width half maximum of about 2.5 mag.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0707.3567
| 1
|
Automatizing the application of Mellin-Barnes representations for Feynman integrals
|
Feynman diagrams may be evaluated by Mellin-Barnes representations of their Feynman parameter integrals in d=4-2 dimensions. Recently, the Mathematica toolkit AMBRE has been developed for the automatic derivation of such representations with a loop-by-loop approach. We describe the package and exemplify its use with the -expansion of the massive one-loop QED vertex function.
|
[
{
"name": "J. Gluza",
"orcid": null
},
{
"name": "F. Haas",
"orcid": null
},
{
"name": "K. Kajda",
"orcid": null
},
{
"name": "T. Riemann",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
2008-07-03
|
2009-12-01
| null |
PoSACAT2007:081,2007
|
10 pages, contribution to proceedings of ACAT, Amsterdam, The Netherlands, April 23-27, 2007, several (trivial) typos corrected
|
arXiv License
|
XML-ArXiv-OAI
|
Feynman diagrams may be evaluated by Mellin-Barnes representations of their Feynman parameter integrals in d=4-2 dimensions. Recently, the Mathematica toolkit AMBRE has been developed for the automatic derivation of such representations with a loop-by-loop approach. We describe the package and exemplify its use with the -expansion of the massive one-loop QED vertex function.
|
[
"Feynman diagrams may be evaluated by Mellin-Barnes representations of their Feynman parameter integrals in d=4-2 dimensions",
"Recently, the Mathematica toolkit AMBRE has been developed for the automatic derivation of such representations with a loop-by-loop approach",
"We describe the package and exemplify its use with the -expansion of the massive one-loop QED vertex function"
] | 3
|
[] | 0
| false
|
[] |
[] | 68
|
Title: Automatizing the application of Mellin-Barnes representations for Feynman integrals
Categories: hep-ph
Abstract: Feynman diagrams may be evaluated by Mellin-Barnes representations of their Feynman parameter integrals in d=4-2 dimensions. Recently, the Mathematica toolkit AMBRE has been developed for the automatic derivation of such representations with a loop-by-loop approach. We describe the package and exemplify its use with the -expansion of the massive one-loop QED vertex function.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0912.3789
| 1
|
Magnetic Domain Wall Pumping by Spin Transfer Torque
|
We show that spin transfer torque from direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque enables DW pumping: long-range DW displacement driven by alternating current. Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current.
|
[
{
"name": "Carl T. Boone",
"orcid": null
},
{
"name": "Ilya N. Krivorotov",
"orcid": null
}
] |
[
"cond-mat.other"
] |
cond-mat.other
|
Other
|
2009-12-18
|
2015-05-14
|
10.1103/PhysRevLett.104.167205
| null | null |
arXiv License
|
XML-ArXiv-OAI
|
We show that spin transfer torque from direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque enables DW pumping: long-range DW displacement driven by alternating current. Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current.
|
[
"We show that spin transfer torque from direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity",
"This unidirectional response of the DW to spin torque enables DW pumping: long-range DW displacement driven by alternating current",
"Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current"
] | 3
|
[] | 0
| false
|
[] |
[] | 93
|
Title: Magnetic Domain Wall Pumping by Spin Transfer Torque
Categories: cond-mat.other
Abstract: We show that spin transfer torque from direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque enables DW pumping: long-range DW displacement driven by alternating current. Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1605.03443
| 1
|
Dimensional Reduction in Quantum Dipolar Antiferromagnets
|
We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0.25(1). The exponents agree with the 2D XY/h universality class despite the lack of apparent two-dimensionality in the structure. The order-parameter exponent for the quantum phase transitions is found to be 0.35(1) corresponding to (2+1)D. These results are in line with those found for LiErF which has the same crystal structure, but largely different T, crystal field environment and hyperfine interactions. Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice.
|
[
{
"name": "P. Babkevich",
"orcid": null
},
{
"name": "M. Jeong",
"orcid": null
},
{
"name": "Y. Matsumoto",
"orcid": null
},
{
"name": "I. Kovacevic",
"orcid": null
},
{
"name": "A. Finco",
"orcid": null
},
{
"name": "R. Toft-Petersen",
"orcid": null
},
{
"name": "C. Ritter",
"orcid": null
},
{
"name": "M. Månsson",
"orcid": null
},
{
"name": "S. Nakatsuji",
"orcid": null
},
{
"name": "H. M. Rønnow",
"orcid": null
}
] |
[
"cond-mat.str-el"
] |
cond-mat.str-el
|
Other
|
2016-05-11
|
2016-05-12
|
10.1103/PhysRevLett.116.197202
|
Phys. Rev. Lett. 116, 197202 (2016)
|
9 pages, 7 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0.25(1). The exponents agree with the 2D XY/h universality class despite the lack of apparent two-dimensionality in the structure. The order-parameter exponent for the quantum phase transitions is found to be 0.35(1) corresponding to (2+1)D. These results are in line with those found for LiErF which has the same crystal structure, but largely different T, crystal field environment and hyperfine interactions. Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice.
|
[
"We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF",
"For the thermal transition, the order-parameter critical exponent is found to be 0",
"20(1) and the specific-heat critical exponent -0",
"The exponents agree with the 2D XY/h universality class despite the lack of apparent two-dimensionality in the structure",
"The order-parameter exponent for the quantum phase transitions is found to be 0",
"35(1) corresponding to (2+1)D",
"These results are in line with those found for LiErF which has the same crystal structure, but largely different T, crystal field environment and hyperfine interactions",
"Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice"
] | 8
|
[
"_4",
"_4",
"_4",
"_N"
] | 4
| true
|
[] |
[] | 148
|
Title: Dimensional Reduction in Quantum Dipolar Antiferromagnets
Categories: cond-mat.str-el
Abstract: We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0.25(1). The exponents agree with the 2D XY/h universality class despite the lack of apparent two-dimensionality in the structure. The order-parameter exponent for the quantum phase transitions is found to be 0.35(1) corresponding to (2+1)D. These results are in line with those found for LiErF which has the same crystal structure, but largely different T, crystal field environment and hyperfine interactions. Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ph/0512266
| 1
|
DAMA detection claim is still compatible with all other DM searches
|
We show that the annual modulation signal observed by DAMA can be reconciled with all other negative results from dark matter searches with a conventional halo model for particle masses around 5 to 9 GeV. We also show which particular dark matter stream could produce the DAMA signal.
|
[
{
"name": "Graciela B. Gelmini",
"orcid": null
}
] |
[
"hep-ph"
] |
hep-ph
|
Other
|
2005-12-20
|
2009-12-01
|
10.1088/1742-6596/39/1/040
|
J.Phys.Conf.Ser. 39 (2006) 166-169
|
Talk given at TAUP2005, Sept. 10-14 2005, Zaragoza (Spain). 3 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We show that the annual modulation signal observed by DAMA can be reconciled with all other negative results from dark matter searches with a conventional halo model for particle masses around 5 to 9 GeV. We also show which particular dark matter stream could produce the DAMA signal.
|
[
"We show that the annual modulation signal observed by DAMA can be reconciled with all other negative results from dark matter searches with a conventional halo model for particle masses around 5 to 9 GeV",
"We also show which particular dark matter stream could produce the DAMA signal"
] | 2
|
[] | 0
| false
|
[] |
[] | 62
|
Title: DAMA detection claim is still compatible with all other DM searches
Categories: hep-ph
Abstract: We show that the annual modulation signal observed by DAMA can be reconciled with all other negative results from dark matter searches with a conventional halo model for particle masses around 5 to 9 GeV. We also show which particular dark matter stream could produce the DAMA signal.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1505.05221
| 1
|
LOT-G3: Plasma Lamp, Ozonator and CW transmitter
|
The LOT-G3 is designed to be a versatile equipment that perform several simple experiments for use in helping the physics classes for high school. Easy construction, low cost, using easily accessible materials. Its construction involves simple practices and knowledge of electromagnetism. It has the function of a plasma globe to demonstrate the ionization of a low pressure gas, as well as the formation of magnetic field. Can be used as sanitizer closed environments such as automotive vehicles in ozonator function, demonstrating the ionization of oxygen in the atmosphere, producing ozone, essential to life on earth. And as a sparks transmitter, low power, low frequency modulated continuous wave in (CW), for signals in Morse code. Therefore the equipment here called LOT-G3, has three functions: a plasma lamp, ozonator and CW transmitter.
|
[
{
"name": "Ricardo Gobato",
"orcid": null
},
{
"name": "Desire Francine Gobato",
"orcid": null
},
{
"name": "Alekssander Gobato",
"orcid": null
}
] |
[
"physics.ed-ph"
] |
physics.ed-ph
|
Physics
|
2015-05-20
|
2016-02-05
|
10.5902/2179-460X19387
| null |
in Portuguese
|
arXiv License
|
XML-ArXiv-OAI
|
The LOT-G3 is designed to be a versatile equipment that perform several simple experiments for use in helping the physics classes for high school. Easy construction, low cost, using easily accessible materials. Its construction involves simple practices and knowledge of electromagnetism. It has the function of a plasma globe to demonstrate the ionization of a low pressure gas, as well as the formation of magnetic field. Can be used as sanitizer closed environments such as automotive vehicles in ozonator function, demonstrating the ionization of oxygen in the atmosphere, producing ozone, essential to life on earth. And as a sparks transmitter, low power, low frequency modulated continuous wave in (CW), for signals in Morse code. Therefore the equipment here called LOT-G3, has three functions: a plasma lamp, ozonator and CW transmitter.
|
[
"The LOT-G3 is designed to be a versatile equipment that perform several simple experiments for use in helping the physics classes for high school",
"Easy construction, low cost, using easily accessible materials",
"Its construction involves simple practices and knowledge of electromagnetism",
"It has the function of a plasma globe to demonstrate the ionization of a low pressure gas, as well as the formation of magnetic field",
"Can be used as sanitizer closed environments such as automotive vehicles in ozonator function, demonstrating the ionization of oxygen in the atmosphere, producing ozone, essential to life on earth",
"And as a sparks transmitter, low power, low frequency modulated continuous wave in (CW), for signals in Morse code",
"Therefore the equipment here called LOT-G3, has three functions: a plasma lamp, ozonator and CW transmitter"
] | 7
|
[] | 0
| false
|
[] |
[] | 169
|
Title: LOT-G3: Plasma Lamp, Ozonator and CW transmitter
Categories: physics.ed-ph
Abstract: The LOT-G3 is designed to be a versatile equipment that perform several simple experiments for use in helping the physics classes for high school. Easy construction, low cost, using easily accessible materials. Its construction involves simple practices and knowledge of electromagnetism. It has the function of a plasma globe to demonstrate the ionization of a low pressure gas, as well as the formation of magnetic field. Can be used as sanitizer closed environments such as automotive vehicles in ozonator function, demonstrating the ionization of oxygen in the atmosphere, producing ozone, essential to life on earth. And as a sparks transmitter, low power, low frequency modulated continuous wave in (CW), for signals in Morse code. Therefore the equipment here called LOT-G3, has three functions: a plasma lamp, ozonator and CW transmitter.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/9908179
| 1
|
Van Hove Singularities around the Fermi level in YBa2Cu3O7: The importance of the chains
|
We have reproduced band structure calculations from the literature and have used them to analyze in detail the energy landscape around the Fermi level. We found three Van Hove singularities, two below (-230, -54 meV) and one above the Fermi level (+27 meV). We have studied the composition of each one of them and found that states comming from the chain do contribute in a very importan way. The contribution from the planes are indeed important and, therefore, we find that a 2D description includes the most important contributions. Nevertheless, the contribution from states out of the planes (the chains and the apical oxygen) is by no means negligable. We find that it is possible that in YBaCuO part of the condensate lies in the chains, a fact that would agree with some recent evidences concerning PrBaCuO. Our general conclusion is that the 2D description of 123-compounds might be insuficient to explain all the experimental details and that a 3D description seems compulsory to fully account for the phenomenom of superconductivity in YBaCuO.
|
[
{
"name": "A. Rubio-Ponce",
"orcid": null
},
{
"name": "R. Baquero",
"orcid": null
}
] |
[
"cond-mat.mtrl-sci"
] |
cond-mat.mtrl-sci
|
Other
|
1999-08-12
|
2009-11-30
| null | null |
8 Pages, 4 eps figures, sumitted to Phys. Rev. B
|
arXiv License
|
XML-ArXiv-OAI
|
We have reproduced band structure calculations from the literature and have used them to analyze in detail the energy landscape around the Fermi level. We found three Van Hove singularities, two below (-230, -54 meV) and one above the Fermi level (+27 meV). We have studied the composition of each one of them and found that states comming from the chain do contribute in a very importan way. The contribution from the planes are indeed important and, therefore, we find that a 2D description includes the most important contributions. Nevertheless, the contribution from states out of the planes (the chains and the apical oxygen) is by no means negligable. We find that it is possible that in YBaCuO part of the condensate lies in the chains, a fact that would agree with some recent evidences concerning PrBaCuO. Our general conclusion is that the 2D description of 123-compounds might be insuficient to explain all the experimental details and that a 3D description seems compulsory to fully account for the phenomenom of superconductivity in YBaCuO.
|
[
"We have reproduced band structure calculations from the literature and have used them to analyze in detail the energy landscape around the Fermi level",
"We found three Van Hove singularities, two below (-230, -54 meV) and one above the Fermi level (+27 meV)",
"We have studied the composition of each one of them and found that states comming from the chain do contribute in a very importan way",
"The contribution from the planes are indeed important and, therefore, we find that a 2D description includes the most important contributions",
"Nevertheless, the contribution from states out of the planes (the chains and the apical oxygen) is by no means negligable",
"We find that it is possible that in YBaCuO part of the condensate lies in the chains, a fact that would agree with some recent evidences concerning PrBaCuO",
"Our general conclusion is that the 2D description of 123-compounds might be insuficient to explain all the experimental details and that a 3D description seems compulsory to fully account for the phenomenom of superconductivity in YBaCuO"
] | 7
|
[] | 0
| false
|
[] |
[] | 224
|
Title: Van Hove Singularities around the Fermi level in YBa2Cu3O7: The importance of the chains
Categories: cond-mat.mtrl-sci
Abstract: We have reproduced band structure calculations from the literature and have used them to analyze in detail the energy landscape around the Fermi level. We found three Van Hove singularities, two below (-230, -54 meV) and one above the Fermi level (+27 meV). We have studied the composition of each one of them and found that states comming from the chain do contribute in a very importan way. The contribution from the planes are indeed important and, therefore, we find that a 2D description includes the most important contributions. Nevertheless, the contribution from states out of the planes (the chains and the apical oxygen) is by no means negligable. We find that it is possible that in YBaCuO part of the condensate lies in the chains, a fact that would agree with some recent evidences concerning PrBaCuO. Our general conclusion is that the 2D description of 123-compounds might be insuficient to explain all the experimental details and that a 3D description seems compulsory to fully account for the phenomenom of superconductivity in YBaCuO.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/0602602
| 1
|
Phase Diagram of Heavy Fermion Metal CeCoIn5
|
We present a comprehensive analysis of the low temperature experimental H-T phase diagram of CeCoIn5. The main universal features of the diagram can be explained within the Fermi-liquid theory provided that quasiparticles form so called fermion-condensate state. We show that in this case the fluctuations accompanying an ordinary quantum critical point are strongly suppressed and cannot destroy the quasiparticles. Analyzing the phase diagram and giving predictions, we demonstrate that the electronic system of CeCoIn5 provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi liquid behavior.
|
[
{
"name": "V. R. Shaginyan",
"orcid": null
},
{
"name": "A. Z. Msezane",
"orcid": null
},
{
"name": "V. A. Stephanovich",
"orcid": null
},
{
"name": "E. V. Kirichenko",
"orcid": null
}
] |
[
"cond-mat.str-el",
"cond-mat.supr-con"
] |
cond-mat.str-el
|
Other
|
2006-02-25
|
2009-12-01
| null | null |
5 pages, 1 figure
|
arXiv License
|
XML-ArXiv-OAI
|
We present a comprehensive analysis of the low temperature experimental H-T phase diagram of CeCoIn5. The main universal features of the diagram can be explained within the Fermi-liquid theory provided that quasiparticles form so called fermion-condensate state. We show that in this case the fluctuations accompanying an ordinary quantum critical point are strongly suppressed and cannot destroy the quasiparticles. Analyzing the phase diagram and giving predictions, we demonstrate that the electronic system of CeCoIn5 provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi liquid behavior.
|
[
"We present a comprehensive analysis of the low temperature experimental H-T phase diagram of CeCoIn5",
"The main universal features of the diagram can be explained within the Fermi-liquid theory provided that quasiparticles form so called fermion-condensate state",
"We show that in this case the fluctuations accompanying an ordinary quantum critical point are strongly suppressed and cannot destroy the quasiparticles",
"Analyzing the phase diagram and giving predictions, we demonstrate that the electronic system of CeCoIn5 provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi liquid behavior"
] | 4
|
[] | 0
| false
|
[] |
[] | 115
|
Title: Phase Diagram of Heavy Fermion Metal CeCoIn5
Categories: cond-mat.str-el, cond-mat.supr-con
Abstract: We present a comprehensive analysis of the low temperature experimental H-T phase diagram of CeCoIn5. The main universal features of the diagram can be explained within the Fermi-liquid theory provided that quasiparticles form so called fermion-condensate state. We show that in this case the fluctuations accompanying an ordinary quantum critical point are strongly suppressed and cannot destroy the quasiparticles. Analyzing the phase diagram and giving predictions, we demonstrate that the electronic system of CeCoIn5 provides a unique opportunity to study the relationship between quasiparticles properties and non-Fermi liquid behavior.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1006.3088
| 1
|
First passage time distribution for a random walker on a random forcing energy landscape
|
We present an analytical approximation scheme for the first passage time distribution on a finite interval of a random walker on a random forcing energy landscape. The approximation scheme captures the behavior of the distribution over all timescales in the problem. The results are carefully checked against numerical simulations.
|
[
{
"name": "Michael Sheinman",
"orcid": null
},
{
"name": "Olivier Bénichou",
"orcid": null
},
{
"name": "Raphaël Voituriez",
"orcid": null
},
{
"name": "Yariv Kafri",
"orcid": null
}
] |
[
"cond-mat.stat-mech",
"cond-mat.dis-nn"
] |
cond-mat.stat-mech
|
Other
|
2010-09-02
|
2010-09-23
|
10.1088/1742-5468/2010/09/P09005
|
M. Sheinman, O. Bénichou, R. Voituriez and Y. Kafri J. Stat. Mech. (2010) P09005
|
16 pages
|
arXiv License
|
XML-ArXiv-OAI
|
We present an analytical approximation scheme for the first passage time distribution on a finite interval of a random walker on a random forcing energy landscape. The approximation scheme captures the behavior of the distribution over all timescales in the problem. The results are carefully checked against numerical simulations.
|
[
"We present an analytical approximation scheme for the first passage time distribution on a finite interval of a random walker on a random forcing energy landscape",
"The approximation scheme captures the behavior of the distribution over all timescales in the problem",
"The results are carefully checked against numerical simulations"
] | 3
|
[] | 0
| false
|
[] |
[] | 63
|
Title: First passage time distribution for a random walker on a random forcing energy landscape
Categories: cond-mat.stat-mech, cond-mat.dis-nn
Abstract: We present an analytical approximation scheme for the first passage time distribution on a finite interval of a random walker on a random forcing energy landscape. The approximation scheme captures the behavior of the distribution over all timescales in the problem. The results are carefully checked against numerical simulations.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:physics/0207062
| 1
|
A Novel Magnetometer
|
A magnetometer has been developed by a simple modification of the TEL-Atomic Cavendish balance designed by the author. The usual tungsten wire fiber has been replaced with a silk thread, and a rare earth magnet has been attached to the boom near where the fiber connects. Because of the mechanical common mode rejection feature of the instrument, pendulous noise is largely removed from this compass-like magnetometer that is quite sensitive to direction changes in the Earth's field.
|
[
{
"name": "Randall D. Peters",
"orcid": null
}
] |
[
"physics.ins-det",
"physics.geo-ph"
] |
physics.ins-det
|
Physics
|
2002-07-16
|
2009-12-01
| null | null |
4 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
A magnetometer has been developed by a simple modification of the TEL-Atomic Cavendish balance designed by the author. The usual tungsten wire fiber has been replaced with a silk thread, and a rare earth magnet has been attached to the boom near where the fiber connects. Because of the mechanical common mode rejection feature of the instrument, pendulous noise is largely removed from this compass-like magnetometer that is quite sensitive to direction changes in the Earth's field.
|
[
"A magnetometer has been developed by a simple modification of the TEL-Atomic Cavendish balance designed by the author",
"The usual tungsten wire fiber has been replaced with a silk thread, and a rare earth magnet has been attached to the boom near where the fiber connects",
"Because of the mechanical common mode rejection feature of the instrument, pendulous noise is largely removed from this compass-like magnetometer that is quite sensitive to direction changes in the Earth's field"
] | 3
|
[] | 0
| false
|
[] |
[] | 100
|
Title: A Novel Magnetometer
Categories: physics.ins-det, physics.geo-ph
Abstract: A magnetometer has been developed by a simple modification of the TEL-Atomic Cavendish balance designed by the author. The usual tungsten wire fiber has been replaced with a silk thread, and a rare earth magnet has been attached to the boom near where the fiber connects. Because of the mechanical common mode rejection feature of the instrument, pendulous noise is largely removed from this compass-like magnetometer that is quite sensitive to direction changes in the Earth's field.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/0602063
| 1
|
Non-equilibrium Entanglement and Noise in Coupled Qubits
|
We study charge entanglement in two Coulomb-coupled double quantum dots in thermal equilibrium and under stationary non-equilibrium transport conditions. In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by Quantum Zeno localisation or by an interaction induced energy gap. We also calculate quantum noise spectra and discuss the inter-dot current correlation as an indicator of the entanglement in transport experiments.
|
[
{
"name": "N. Lambert",
"orcid": null
},
{
"name": "R. Aguado",
"orcid": null
},
{
"name": "T. Brandes",
"orcid": null
}
] |
[
"cond-mat.mes-hall",
"quant-ph"
] |
cond-mat.mes-hall
|
Other
|
2006-02-03
|
2009-12-01
|
10.1103/PhysRevB.75.045340
|
Phys. Rev. B 75, 045340 (2007)
|
4 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We study charge entanglement in two Coulomb-coupled double quantum dots in thermal equilibrium and under stationary non-equilibrium transport conditions. In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by Quantum Zeno localisation or by an interaction induced energy gap. We also calculate quantum noise spectra and discuss the inter-dot current correlation as an indicator of the entanglement in transport experiments.
|
[
"We study charge entanglement in two Coulomb-coupled double quantum dots in thermal equilibrium and under stationary non-equilibrium transport conditions",
"In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by Quantum Zeno localisation or by an interaction induced energy gap",
"We also calculate quantum noise spectra and discuss the inter-dot current correlation as an indicator of the entanglement in transport experiments"
] | 3
|
[] | 0
| false
|
[] |
[] | 91
|
Title: Non-equilibrium Entanglement and Noise in Coupled Qubits
Categories: cond-mat.mes-hall, quant-ph
Abstract: We study charge entanglement in two Coulomb-coupled double quantum dots in thermal equilibrium and under stationary non-equilibrium transport conditions. In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by Quantum Zeno localisation or by an interaction induced energy gap. We also calculate quantum noise spectra and discuss the inter-dot current correlation as an indicator of the entanglement in transport experiments.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0807.2093
| 1
|
Fe K alpha and hydrodynamic loop model diagnostics for a large flare on II Peg
|
The observation by the Swift X-ray Telescope of the Fe K alpha_1, alpha_2 doublet during a large flare on the RS CVn binary system II Peg represents one of only two firm detections to date of photospheric Fe K alpha from a star other than our Sun. We present models of the Fe K alpha equivalent widths reported in the literature for the II Peg observations and show that they are most probably due to fluorescence following inner shell photoionisation of quasi-neutral Fe by the flare X-rays. Our models constrain the maximum height of flare the to 0.15 R_* assuming solar abundances for the photospheric material, and 0.1 R_* and 0.06 R_* assuming depleted photospheric abundances ([M/H]=-0.2 and [M/H]=-0.4, respectively). Accounting for an extended loop geometry has the effect of increasing the estimated flare heights by a factor of ~3. These predictions are consistent with those derived using results of flaring loop models, which are also used to estimate the flaring loop properties and energetics. From loop models we estimate a flare loop height of 0.13 R_*, plasma density of ~4 * 10^12 cm^-3 and emitting volume of ~6 * 10^30 cm^3. Our estimates for the flare dimensions and density allow us to estimate the conductive energy losses to E_cond <= 2 * 10^36 erg, consistent with upper limits previously obtained in the literature. Finally, we estimate the average energy output of this large flare to be ~10^33 erg sec^-1, or 1/10th of the stellar bolometric luminosity.
|
[
{
"name": "Barbara Ercolano",
"orcid": null
},
{
"name": "Jeremy J. Drake",
"orcid": null
},
{
"name": "Fabio Reale",
"orcid": null
},
{
"name": "Paola Testa",
"orcid": null
},
{
"name": "Jon M. Miller",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2008-07-14
|
2009-12-01
|
10.1086/591934
| null |
5 pages, 2 figures, accepted for publication in ApJ
|
arXiv License
|
XML-ArXiv-OAI
|
The observation by the Swift X-ray Telescope of the Fe K alpha_1, alpha_2 doublet during a large flare on the RS CVn binary system II Peg represents one of only two firm detections to date of photospheric Fe K alpha from a star other than our Sun. We present models of the Fe K alpha equivalent widths reported in the literature for the II Peg observations and show that they are most probably due to fluorescence following inner shell photoionisation of quasi-neutral Fe by the flare X-rays. Our models constrain the maximum height of flare the to 0.15 R_* assuming solar abundances for the photospheric material, and 0.1 R_* and 0.06 R_* assuming depleted photospheric abundances ([M/H]=-0.2 and [M/H]=-0.4, respectively). Accounting for an extended loop geometry has the effect of increasing the estimated flare heights by a factor of ~3. These predictions are consistent with those derived using results of flaring loop models, which are also used to estimate the flaring loop properties and energetics. From loop models we estimate a flare loop height of 0.13 R_*, plasma density of ~4 * 10^12 cm^-3 and emitting volume of ~6 * 10^30 cm^3. Our estimates for the flare dimensions and density allow us to estimate the conductive energy losses to E_cond <= 2 * 10^36 erg, consistent with upper limits previously obtained in the literature. Finally, we estimate the average energy output of this large flare to be ~10^33 erg sec^-1, or 1/10th of the stellar bolometric luminosity.
|
[
"The observation by the Swift X-ray Telescope of the Fe K alpha_1, alpha_2 doublet during a large flare on the RS CVn binary system II Peg represents one of only two firm detections to date of photospheric Fe K alpha from a star other than our Sun",
"We present models of the Fe K alpha equivalent widths reported in the literature for the II Peg observations and show that they are most probably due to fluorescence following inner shell photoionisation of quasi-neutral Fe by the flare X-rays",
"Our models constrain the maximum height of flare the to 0",
"15 R_* assuming solar abundances for the photospheric material, and 0",
"06 R_* assuming depleted photospheric abundances ([M/H]=-0",
"Accounting for an extended loop geometry has the effect of increasing the estimated flare heights by a factor of ~3",
"These predictions are consistent with those derived using results of flaring loop models, which are also used to estimate the flaring loop properties and energetics",
"From loop models we estimate a flare loop height of 0",
"13 R_*, plasma density of ~4 * 10^12 cm^-3 and emitting volume of ~6 * 10^30 cm^3",
"Our estimates for the flare dimensions and density allow us to estimate the conductive energy losses to E_cond <= 2 * 10^36 erg, consistent with upper limits previously obtained in the literature",
"Finally, we estimate the average energy output of this large flare to be ~10^33 erg sec^-1, or 1/10th of the stellar bolometric luminosity"
] | 11
|
[] | 0
| false
|
[] |
[] | 321
|
Title: Fe K alpha and hydrodynamic loop model diagnostics for a large flare on II Peg
Categories: astro-ph
Abstract: The observation by the Swift X-ray Telescope of the Fe K alpha_1, alpha_2 doublet during a large flare on the RS CVn binary system II Peg represents one of only two firm detections to date of photospheric Fe K alpha from a star other than our Sun. We present models of the Fe K alpha equivalent widths reported in the literature for the II Peg observations and show that they are most probably due to fluorescence following inner shell photoionisation of quasi-neutral Fe by the flare X-rays. Our models constrain the maximum height of flare the to 0.15 R_* assuming solar abundances for the photospheric material, and 0.1 R_* and 0.06 R_* assuming depleted photospheric abundances ([M/H]=-0.2 and [M/H]=-0.4, respectively). Accounting for an extended loop geometry has the effect of increasing the estimated flare heights by a factor of ~3. These predictions are consistent with those derived using results of flaring loop models, which are also used to estimate the flaring loop properties and energetics. From loop models we estimate a flare loop height of 0.13 R_*, plasma density of ~4 * 10^12 cm^-3 and emitting volume of ~6 * 10^30 cm^3. Our estimates for the flare dimensions and density allow us to estimate the conductive energy losses to E_cond <= 2 * 10^36 erg, consistent with upper limits previously obtained in the literature. Finally, we estimate the average energy output of this large flare to be ~10^33 erg sec^-1, or 1/10th of the stellar bolometric luminosity.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1009.3309
| 1
|
Decay in an asymmetric SQUID
|
Quantum tunneling in an asymmetric (with strongly different capacitances) SQUID is studied. Since capacitances play a role of masses one phase, related to a large mass, becomes "heavy" and remains always a constant in a tunneling process. Tunneling in an asymmetric SQUID becomes one-dimensional with a condition of optimization of tunneling probability with respect to a value of the "heavy" phase. An unusual temperature dependence of the tunneling probability is obtained. It has a finite slope at zero temperature and a transition between thermally assisted tunneling and pure activation can be not smooth depending on current through a SQUID.
|
[
{
"name": "J. P. Palomares Baez",
"orcid": null
},
{
"name": "B. Ivlev",
"orcid": null
}
] |
[
"cond-mat.supr-con"
] |
cond-mat.supr-con
|
Other
|
2010-09-17
|
2010-09-20
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
Quantum tunneling in an asymmetric (with strongly different capacitances) SQUID is studied. Since capacitances play a role of masses one phase, related to a large mass, becomes "heavy" and remains always a constant in a tunneling process. Tunneling in an asymmetric SQUID becomes one-dimensional with a condition of optimization of tunneling probability with respect to a value of the "heavy" phase. An unusual temperature dependence of the tunneling probability is obtained. It has a finite slope at zero temperature and a transition between thermally assisted tunneling and pure activation can be not smooth depending on current through a SQUID.
|
[
"Quantum tunneling in an asymmetric (with strongly different capacitances) SQUID is studied",
"Since capacitances play a role of masses one phase, related to a large mass, becomes \"heavy\" and remains always a constant in a tunneling process",
"Tunneling in an asymmetric SQUID becomes one-dimensional with a condition of optimization of tunneling probability with respect to a value of the \"heavy\" phase",
"An unusual temperature dependence of the tunneling probability is obtained",
"It has a finite slope at zero temperature and a transition between thermally assisted tunneling and pure activation can be not smooth depending on current through a SQUID"
] | 5
|
[] | 0
| false
|
[] |
[] | 128
|
Title: Decay in an asymmetric SQUID
Categories: cond-mat.supr-con
Abstract: Quantum tunneling in an asymmetric (with strongly different capacitances) SQUID is studied. Since capacitances play a role of masses one phase, related to a large mass, becomes "heavy" and remains always a constant in a tunneling process. Tunneling in an asymmetric SQUID becomes one-dimensional with a condition of optimization of tunneling probability with respect to a value of the "heavy" phase. An unusual temperature dependence of the tunneling probability is obtained. It has a finite slope at zero temperature and a transition between thermally assisted tunneling and pure activation can be not smooth depending on current through a SQUID.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/0210068
| 1
|
Cosmic Distances: Current Odds and Future Perspectives
|
We discuss recent theoretical and empirical results concerning cosmic distances and discuss the problems affecting the Cepheid and the RR Lyrae distance scales. In particular, we outline the key role that first overtone Cepheids can play to improve the accuracy of distance determinations to nearby galaxies. We also address the positive features of the K-band Period-Luminosity-Metallicity (PLZ_K) relation of RR Lyrae stars when compared to the M_V vs [Fe/H] relation. Moreover, we discuss the impact that accurate multiband data in external galaxies can have on the evolutionary properties of intermediate and low-mass stars. Finally, we introduce possible avenues of future research in stellar astrophysics.
|
[
{
"name": "G. Bono",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2002-10-02
|
2009-12-01
| null | null |
8 pages, 3 figures, to appear in "Hubble's Science Legacy: Future Optical-Ultraviolet Astronomy from Space", eds. K.R. Sembach, J.C. Blades, G.D. Illingworth, & R.C. Kennicutt, ASP Conf. Series
|
arXiv License
|
XML-ArXiv-OAI
|
We discuss recent theoretical and empirical results concerning cosmic distances and discuss the problems affecting the Cepheid and the RR Lyrae distance scales. In particular, we outline the key role that first overtone Cepheids can play to improve the accuracy of distance determinations to nearby galaxies. We also address the positive features of the K-band Period-Luminosity-Metallicity (PLZ_K) relation of RR Lyrae stars when compared to the M_V vs [Fe/H] relation. Moreover, we discuss the impact that accurate multiband data in external galaxies can have on the evolutionary properties of intermediate and low-mass stars. Finally, we introduce possible avenues of future research in stellar astrophysics.
|
[
"We discuss recent theoretical and empirical results concerning cosmic distances and discuss the problems affecting the Cepheid and the RR Lyrae distance scales",
"In particular, we outline the key role that first overtone Cepheids can play to improve the accuracy of distance determinations to nearby galaxies",
"We also address the positive features of the K-band Period-Luminosity-Metallicity (PLZ_K) relation of RR Lyrae stars when compared to the M_V vs [Fe/H] relation",
"Moreover, we discuss the impact that accurate multiband data in external galaxies can have on the evolutionary properties of intermediate and low-mass stars",
"Finally, we introduce possible avenues of future research in stellar astrophysics"
] | 5
|
[] | 0
| false
|
[] |
[] | 135
|
Title: Cosmic Distances: Current Odds and Future Perspectives
Categories: astro-ph
Abstract: We discuss recent theoretical and empirical results concerning cosmic distances and discuss the problems affecting the Cepheid and the RR Lyrae distance scales. In particular, we outline the key role that first overtone Cepheids can play to improve the accuracy of distance determinations to nearby galaxies. We also address the positive features of the K-band Period-Luminosity-Metallicity (PLZ_K) relation of RR Lyrae stars when compared to the M_V vs [Fe/H] relation. Moreover, we discuss the impact that accurate multiband data in external galaxies can have on the evolutionary properties of intermediate and low-mass stars. Finally, we introduce possible avenues of future research in stellar astrophysics.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0808.3556
| 1
|
Dynamical mass of a star cluster in M83: a test of fibre-fed multi-object spectroscopy
|
(Abridged) Aims: We obtained VLT/FLAMES+UVES high-resolution, fibre-fed spectroscopy (FFS) of five young massive clusters in M83 (NGC 5236). This forms the basis of a pilot study testing the feasibility of using FFS to measure the velocity dispersions of several clusters simultaneously, in order to determine their dynamical masses; Methods: We adopted two methods for determining the velocity dispersion of the star clusters: cross-correlating the cluster spectrum with the template spectra and minimising a chi^2 value between the cluster spectrum and the broadened template spectra. Cluster 805 in M83 was chosen as a control to test the reliability of the method, through a comparison with the results obtained from a standard echelle VLT/UVES spectrum obtained by Larsen & Richtler; Results: We find no dependence of the velocity dispersions measured for a cluster on the choice of red giant versus red supergiant templates, nor on the method adopted. We measure a velocity dispersion of sigma_los = 10.2+/-1.1 km/s for cluster 805 from our FFS. Our FLAMES+UVES velocity dispersion measurement gives M_vir = (6.6+/-1.7)e5 M_sun, consistent with previous results. This is a factor of ~3 greater than the cluster's photometric mass, indicating a lack of virial equilibrium. However, based on its effective star formation efficiency, the cluster is likely to virialise, and may survive for a Hubble time, in the absence of external disruptive forces; Conclusions: We find that reliable velocity dispersions can be determined from FFS. The advantages of observing several clusters simultaneously outweighs the difficulty of accurate galaxy background subtraction, providing that the targets are chosen to provide sufficient S/N ratios, and are much brighter than the galaxy background.
|
[
{
"name": "SL Moll",
"orcid": null
},
{
"name": "R de Grijs",
"orcid": null
},
{
"name": "P Anders",
"orcid": null
},
{
"name": "PA Crowther",
"orcid": null
},
{
"name": "SS Larsen",
"orcid": null
},
{
"name": "LJ Smith",
"orcid": null
},
{
"name": "SF Portegies Zwart",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
2008-08-26
|
2009-12-01
|
10.1051/0004-6361:200810163
| null |
10 pages, 4 figures, accepted by A&A
|
arXiv License
|
XML-ArXiv-OAI
|
(Abridged) Aims: We obtained VLT/FLAMES+UVES high-resolution, fibre-fed spectroscopy (FFS) of five young massive clusters in M83 (NGC 5236). This forms the basis of a pilot study testing the feasibility of using FFS to measure the velocity dispersions of several clusters simultaneously, in order to determine their dynamical masses; Methods: We adopted two methods for determining the velocity dispersion of the star clusters: cross-correlating the cluster spectrum with the template spectra and minimising a chi^2 value between the cluster spectrum and the broadened template spectra. Cluster 805 in M83 was chosen as a control to test the reliability of the method, through a comparison with the results obtained from a standard echelle VLT/UVES spectrum obtained by Larsen & Richtler; Results: We find no dependence of the velocity dispersions measured for a cluster on the choice of red giant versus red supergiant templates, nor on the method adopted. We measure a velocity dispersion of sigma_los = 10.2+/-1.1 km/s for cluster 805 from our FFS. Our FLAMES+UVES velocity dispersion measurement gives M_vir = (6.6+/-1.7)e5 M_sun, consistent with previous results. This is a factor of ~3 greater than the cluster's photometric mass, indicating a lack of virial equilibrium. However, based on its effective star formation efficiency, the cluster is likely to virialise, and may survive for a Hubble time, in the absence of external disruptive forces; Conclusions: We find that reliable velocity dispersions can be determined from FFS. The advantages of observing several clusters simultaneously outweighs the difficulty of accurate galaxy background subtraction, providing that the targets are chosen to provide sufficient S/N ratios, and are much brighter than the galaxy background.
|
[
"(Abridged) Aims: We obtained VLT/FLAMES+UVES high-resolution, fibre-fed spectroscopy (FFS) of five young massive clusters in M83 (NGC 5236)",
"This forms the basis of a pilot study testing the feasibility of using FFS to measure the velocity dispersions of several clusters simultaneously, in order to determine their dynamical masses; Methods: We adopted two methods for determining the velocity dispersion of the star clusters: cross-correlating the cluster spectrum with the template spectra and minimising a chi^2 value between the cluster spectrum and the broadened template spectra",
"Cluster 805 in M83 was chosen as a control to test the reliability of the method, through a comparison with the results obtained from a standard echelle VLT/UVES spectrum obtained by Larsen & Richtler; Results: We find no dependence of the velocity dispersions measured for a cluster on the choice of red giant versus red supergiant templates, nor on the method adopted",
"We measure a velocity dispersion of sigma_los = 10",
"1 km/s for cluster 805 from our FFS",
"Our FLAMES+UVES velocity dispersion measurement gives M_vir = (6",
"7)e5 M_sun, consistent with previous results",
"This is a factor of ~3 greater than the cluster's photometric mass, indicating a lack of virial equilibrium",
"However, based on its effective star formation efficiency, the cluster is likely to virialise, and may survive for a Hubble time, in the absence of external disruptive forces; Conclusions: We find that reliable velocity dispersions can be determined from FFS",
"The advantages of observing several clusters simultaneously outweighs the difficulty of accurate galaxy background subtraction, providing that the targets are chosen to provide sufficient S/N ratios, and are much brighter than the galaxy background"
] | 10
|
[] | 0
| false
|
[] |
[] | 348
|
Title: Dynamical mass of a star cluster in M83: a test of fibre-fed multi-object spectroscopy
Categories: astro-ph
Abstract: (Abridged) Aims: We obtained VLT/FLAMES+UVES high-resolution, fibre-fed spectroscopy (FFS) of five young massive clusters in M83 (NGC 5236). This forms the basis of a pilot study testing the feasibility of using FFS to measure the velocity dispersions of several clusters simultaneously, in order to determine their dynamical masses; Methods: We adopted two methods for determining the velocity dispersion of the star clusters: cross-correlating the cluster spectrum with the template spectra and minimising a chi^2 value between the cluster spectrum and the broadened template spectra. Cluster 805 in M83 was chosen as a control to test the reliability of the method, through a comparison with the results obtained from a standard echelle VLT/UVES spectrum obtained by Larsen & Richtler; Results: We find no dependence of the velocity dispersions measured for a cluster on the choice of red giant versus red supergiant templates, nor on the method adopted. We measure a velocity dispersion of sigma_los = 10.2+/-1.1 km/s for cluster 805 from our FFS. Our FLAMES+UVES velocity dispersion measurement gives M_vir = (6.6+/-1.7)e5 M_sun, consistent with previous results. This is a factor of ~3 greater than the cluster's photometric mass, indicating a lack of virial equilibrium. However, based on its effective star formation efficiency, the cluster is likely to virialise, and may survive for a Hubble time, in the absence of external disruptive forces; Conclusions: We find that reliable velocity dispersions can be determined from FFS. The advantages of observing several clusters simultaneously outweighs the difficulty of accurate galaxy background subtraction, providing that the targets are chosen to provide sufficient S/N ratios, and are much brighter than the galaxy background.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-th/9209086
| 1
|
Quantization of Spinning Particle with Anomalous Magnetic Momentum
|
A generalization of the pseudoclassical action of a spinning particle in the presence of an anomalous magnetic moment is given. The leading considerations, to write the action, are gotten from the path integral representation for the causal Green's function of the generalized (by Pauli) Dirac equation for the particle with anomalous magnetic momentum in an external electromagnetic field. The action can be written in reparametrization and supergauge invariant form. Both operator (Dirac) and path-integral (BFV) quantization are discussed. The first one leads to the Dirac-Pauli equation, whereas the second one gives the corresponding propagator. One of the nontrivial points in this case is that both quantizations schemes demand for consistency to take into account an operators ordering problem.
|
[
{
"name": "D. M. Gitman",
"orcid": null
},
{
"name": "A. V. Saa",
"orcid": null
}
] |
[
"hep-th"
] |
hep-th
|
Other
|
1992-09-22
|
2010-04-06
|
10.1088/0264-9381/10/8/007
|
Class.Quant.Grav.10:1447-1460,1993
|
21 pages, IFUSP/P-1008
|
arXiv License
|
XML-ArXiv-OAI
|
A generalization of the pseudoclassical action of a spinning particle in the presence of an anomalous magnetic moment is given. The leading considerations, to write the action, are gotten from the path integral representation for the causal Green's function of the generalized (by Pauli) Dirac equation for the particle with anomalous magnetic momentum in an external electromagnetic field. The action can be written in reparametrization and supergauge invariant form. Both operator (Dirac) and path-integral (BFV) quantization are discussed. The first one leads to the Dirac-Pauli equation, whereas the second one gives the corresponding propagator. One of the nontrivial points in this case is that both quantizations schemes demand for consistency to take into account an operators ordering problem.
|
[
"A generalization of the pseudoclassical action of a spinning particle in the presence of an anomalous magnetic moment is given",
"The leading considerations, to write the action, are gotten from the path integral representation for the causal Green's function of the generalized (by Pauli) Dirac equation for the particle with anomalous magnetic momentum in an external electromagnetic field",
"The action can be written in reparametrization and supergauge invariant form",
"Both operator (Dirac) and path-integral (BFV) quantization are discussed",
"The first one leads to the Dirac-Pauli equation, whereas the second one gives the corresponding propagator",
"One of the nontrivial points in this case is that both quantizations schemes demand for consistency to take into account an operators ordering problem"
] | 6
|
[] | 0
| false
|
[] |
[] | 153
|
Title: Quantization of Spinning Particle with Anomalous Magnetic Momentum
Categories: hep-th
Abstract: A generalization of the pseudoclassical action of a spinning particle in the presence of an anomalous magnetic moment is given. The leading considerations, to write the action, are gotten from the path integral representation for the causal Green's function of the generalized (by Pauli) Dirac equation for the particle with anomalous magnetic momentum in an external electromagnetic field. The action can be written in reparametrization and supergauge invariant form. Both operator (Dirac) and path-integral (BFV) quantization are discussed. The first one leads to the Dirac-Pauli equation, whereas the second one gives the corresponding propagator. One of the nontrivial points in this case is that both quantizations schemes demand for consistency to take into account an operators ordering problem.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1003.4719
| 1
|
Introduction to clarithmetic I
|
"Clarithmetic" is a generic name for formal number theories similar to Peano arithmetic, but based on computability logic (see http://www.cis.upenn.edu/~giorgi/cl.html) instead of the more traditional classical or intuitionistic logics. Formulas of clarithmetical theories represent interactive computational problems, and their "truth" is understood as existence of an algorithmic solution. Imposing various complexity constraints on such solutions yields various versions of clarithmetic. The present paper introduces a system of clarithmetic for polynomial time computability, which is shown to be sound and complete. Sound in the sense that every theorem T of the system represents an interactive number-theoretic computational problem with a polynomial time solution and, furthermore, such a solution can be efficiently extracted from a proof of T. And complete in the sense that every interactive number-theoretic problem with a polynomial time solution is represented by some theorem T of the system. The paper is written in a semitutorial style and targets readers with no prior familiarity with computability logic.
|
[
{
"name": "Giorgi Japaridze",
"orcid": null
}
] |
[
"cs.LO",
"cs.CC",
"math.LO",
"math.NT"
] |
cs.LO
|
Computer Science
|
2011-08-23
|
2011-08-24
|
10.1016/j.ic.2011.07.002
|
Information and Computation 209 (2011), pp. 1312-1354
| null |
arXiv License
|
XML-ArXiv-OAI
|
"Clarithmetic" is a generic name for formal number theories similar to Peano arithmetic, but based on computability logic (see http://www.cis.upenn.edu/~giorgi/cl.html) instead of the more traditional classical or intuitionistic logics. Formulas of clarithmetical theories represent interactive computational problems, and their "truth" is understood as existence of an algorithmic solution. Imposing various complexity constraints on such solutions yields various versions of clarithmetic. The present paper introduces a system of clarithmetic for polynomial time computability, which is shown to be sound and complete. Sound in the sense that every theorem T of the system represents an interactive number-theoretic computational problem with a polynomial time solution and, furthermore, such a solution can be efficiently extracted from a proof of T. And complete in the sense that every interactive number-theoretic problem with a polynomial time solution is represented by some theorem T of the system. The paper is written in a semitutorial style and targets readers with no prior familiarity with computability logic.
|
[
"\"Clarithmetic\" is a generic name for formal number theories similar to Peano arithmetic, but based on computability logic (see http://www",
"html) instead of the more traditional classical or intuitionistic logics",
"Formulas of clarithmetical theories represent interactive computational problems, and their \"truth\" is understood as existence of an algorithmic solution",
"Imposing various complexity constraints on such solutions yields various versions of clarithmetic",
"The present paper introduces a system of clarithmetic for polynomial time computability, which is shown to be sound and complete",
"Sound in the sense that every theorem T of the system represents an interactive number-theoretic computational problem with a polynomial time solution and, furthermore, such a solution can be efficiently extracted from a proof of T",
"And complete in the sense that every interactive number-theoretic problem with a polynomial time solution is represented by some theorem T of the system",
"The paper is written in a semitutorial style and targets readers with no prior familiarity with computability logic"
] | 8
|
[] | 0
| false
|
[] |
[] | 205
|
Title: Introduction to clarithmetic I
Categories: cs.LO, cs.CC, math.LO, math.NT
Abstract: "Clarithmetic" is a generic name for formal number theories similar to Peano arithmetic, but based on computability logic (see http://www.cis.upenn.edu/~giorgi/cl.html) instead of the more traditional classical or intuitionistic logics. Formulas of clarithmetical theories represent interactive computational problems, and their "truth" is understood as existence of an algorithmic solution. Imposing various complexity constraints on such solutions yields various versions of clarithmetic. The present paper introduces a system of clarithmetic for polynomial time computability, which is shown to be sound and complete. Sound in the sense that every theorem T of the system represents an interactive number-theoretic computational problem with a polynomial time solution and, furthermore, such a solution can be efficiently extracted from a proof of T. And complete in the sense that every interactive number-theoretic problem with a polynomial time solution is represented by some theorem T of the system. The paper is written in a semitutorial style and targets readers with no prior familiarity with computability logic.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0902.2192
| 1
|
Status of the Chronopixel Project
|
Other the past few years we have developed a monolithic CMOS pixel detector design for the ILC in collaboration with the SARNOFF Corporation. The unique feature of this design is the recorded time tag for each hit, allowing assignment of the hit to a particular bunch crossing (thus the name Chronopixel). The prototype design was completed in 2007. The first set of prototype devices was fabricated in 2008. We have developed a detailed testing plan and have designed the test electronics in collaboration with SLAC. Testing is expected to start early in 2009.
|
[
{
"name": "C. Baltay",
"orcid": null
},
{
"name": "J. Brau",
"orcid": null
},
{
"name": "W. Emmet",
"orcid": null
},
{
"name": "D. Rabinovich",
"orcid": null
},
{
"name": "N. Sinev",
"orcid": null
},
{
"name": "D. Strom",
"orcid": null
}
] |
[
"physics.ins-det",
"hep-ex"
] |
physics.ins-det
|
Physics
|
2009-02-12
|
2009-12-01
| null | null |
3 pages, 3 figures
|
arXiv License
|
XML-ArXiv-OAI
|
Other the past few years we have developed a monolithic CMOS pixel detector design for the ILC in collaboration with the SARNOFF Corporation. The unique feature of this design is the recorded time tag for each hit, allowing assignment of the hit to a particular bunch crossing (thus the name Chronopixel). The prototype design was completed in 2007. The first set of prototype devices was fabricated in 2008. We have developed a detailed testing plan and have designed the test electronics in collaboration with SLAC. Testing is expected to start early in 2009.
|
[
"Other the past few years we have developed a monolithic CMOS pixel detector design for the ILC in collaboration with the SARNOFF Corporation",
"The unique feature of this design is the recorded time tag for each hit, allowing assignment of the hit to a particular bunch crossing (thus the name Chronopixel)",
"The prototype design was completed in 2007",
"The first set of prototype devices was fabricated in 2008",
"We have developed a detailed testing plan and have designed the test electronics in collaboration with SLAC",
"Testing is expected to start early in 2009"
] | 6
|
[] | 0
| false
|
[] |
[] | 120
|
Title: Status of the Chronopixel Project
Categories: physics.ins-det, hep-ex
Abstract: Other the past few years we have developed a monolithic CMOS pixel detector design for the ILC in collaboration with the SARNOFF Corporation. The unique feature of this design is the recorded time tag for each hit, allowing assignment of the hit to a particular bunch crossing (thus the name Chronopixel). The prototype design was completed in 2007. The first set of prototype devices was fabricated in 2008. We have developed a detailed testing plan and have designed the test electronics in collaboration with SLAC. Testing is expected to start early in 2009.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:q-bio/0604013
| 1
|
CRNPRED: Highly Accurate Prediction of One-dimensional Protein Structures by Large-scale Critical Random Networks
|
Background: One-dimensional protein structures such as secondary structures or contact numbers are useful for three-dimensional structure prediction and helpful for intuitive understanding of the sequence-structure relationship. Accurate prediction methods will serve as a basis for these and other purposes. Results: We implemented a program CRNPRED which predicts secondary structures, contact numbers and residue-wise contact orders. This program is based on a novel machine learning scheme called critical random networks. Unlike most conventional one-dimensional structure prediction methods which are based on local windows of an amino acid sequence, CRNPRED takes into account the whole sequence. CRNPRED achieves, on average per chain, Q3 = 81% for secondary structure prediction, and correlation coefficients of 0.75 and 0.61 for contact number and residue-wise contact order predictions, respectively. Conclusion: CRNPRED will be a useful tool for computational as well as experimental biologists who need accurate one-dimensional protein structure predictions.
|
[
{
"name": "Akira R. Kinjo",
"orcid": null
},
{
"name": "Ken Nishikawa",
"orcid": null
}
] |
[
"q-bio.BM"
] |
q-bio.BM
|
Other
|
2006-04-12
|
2009-12-01
|
10.1186/1471-2105-7-401
|
BMC Bioinformatics, 7:401 (2006)
|
10 pages, 1 figure, 2 tables
|
arXiv License
|
XML-ArXiv-OAI
|
Background: One-dimensional protein structures such as secondary structures or contact numbers are useful for three-dimensional structure prediction and helpful for intuitive understanding of the sequence-structure relationship. Accurate prediction methods will serve as a basis for these and other purposes. Results: We implemented a program CRNPRED which predicts secondary structures, contact numbers and residue-wise contact orders. This program is based on a novel machine learning scheme called critical random networks. Unlike most conventional one-dimensional structure prediction methods which are based on local windows of an amino acid sequence, CRNPRED takes into account the whole sequence. CRNPRED achieves, on average per chain, Q3 = 81% for secondary structure prediction, and correlation coefficients of 0.75 and 0.61 for contact number and residue-wise contact order predictions, respectively. Conclusion: CRNPRED will be a useful tool for computational as well as experimental biologists who need accurate one-dimensional protein structure predictions.
|
[
"Background: One-dimensional protein structures such as secondary structures or contact numbers are useful for three-dimensional structure prediction and helpful for intuitive understanding of the sequence-structure relationship",
"Accurate prediction methods will serve as a basis for these and other purposes",
"Results: We implemented a program CRNPRED which predicts secondary structures, contact numbers and residue-wise contact orders",
"This program is based on a novel machine learning scheme called critical random networks",
"Unlike most conventional one-dimensional structure prediction methods which are based on local windows of an amino acid sequence, CRNPRED takes into account the whole sequence",
"CRNPRED achieves, on average per chain, Q3 = 81% for secondary structure prediction, and correlation coefficients of 0",
"61 for contact number and residue-wise contact order predictions, respectively",
"Conclusion: CRNPRED will be a useful tool for computational as well as experimental biologists who need accurate one-dimensional protein structure predictions"
] | 8
|
[] | 0
| false
|
[] |
[] | 187
|
Title: CRNPRED: Highly Accurate Prediction of One-dimensional Protein Structures by Large-scale Critical Random Networks
Categories: q-bio.BM
Abstract: Background: One-dimensional protein structures such as secondary structures or contact numbers are useful for three-dimensional structure prediction and helpful for intuitive understanding of the sequence-structure relationship. Accurate prediction methods will serve as a basis for these and other purposes. Results: We implemented a program CRNPRED which predicts secondary structures, contact numbers and residue-wise contact orders. This program is based on a novel machine learning scheme called critical random networks. Unlike most conventional one-dimensional structure prediction methods which are based on local windows of an amino acid sequence, CRNPRED takes into account the whole sequence. CRNPRED achieves, on average per chain, Q3 = 81% for secondary structure prediction, and correlation coefficients of 0.75 and 0.61 for contact number and residue-wise contact order predictions, respectively. Conclusion: CRNPRED will be a useful tool for computational as well as experimental biologists who need accurate one-dimensional protein structure predictions.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:astro-ph/9711244
| 1
|
Population synthesis oh high energy transients. Relativistic binary merging rates
|
The simulated rates of NS+NS, NS+BH and BH+BH mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection.
|
[
{
"name": "Vladimir M. Lipunov",
"orcid": null
}
] |
[
"astro-ph"
] |
astro-ph
|
Other
|
1997-11-21
|
2009-12-01
| null | null |
5 pages, LaTeX, jd.sty, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
The simulated rates of NS+NS, NS+BH and BH+BH mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection.
|
[
"The simulated rates of NS+NS, NS+BH and BH+BH mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection"
] | 1
|
[] | 0
| false
|
[] |
[] | 29
|
Title: Population synthesis oh high energy transients. Relativistic binary merging rates
Categories: astro-ph
Abstract: The simulated rates of NS+NS, NS+BH and BH+BH mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1401.7566
| 1
|
A Demonstration of Wavefront Sensing and Mirror Phasing from the Image Domain
|
In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path, or by imperfectly phased subapertures in a segmented mirror. Active and adaptive optics (AO), consisting of a wavefront sensor and a deformable mirror, are employed to address this problem. Nevertheless, the non-common-path between the wavefront sensor and the science camera leads to persistent quasi-static speckles that are difficult to calibrate and which impose a floor on the image contrast. In this paper we present the first experimental demonstration of a novel wavefront sensor requiring only a minor asymmetric obscuration of the pupil, using the science camera itself to detect high order wavefront errors from the speckle pattern produced. We apply this to correct errors imposed on a deformable microelectromechanical (MEMS) segmented mirror in a closed loop, restoring a high quality point spread function (PSF) and residual wavefront errors of order nm using 1600 nm light, from a starting point of nm in piston and mrad in tip-tilt. We recommend this as a method for measuring the non-common-path error in AO-equipped ground based telescopes, as well as as an approach to phasing difficult segmented mirrors such as on the primary and as a future direction for extreme adaptive optics.
|
[
{
"name": "Benjamin Pope",
"orcid": null
},
{
"name": "Nick Cvetojevic",
"orcid": null
},
{
"name": "Anthony Cheetham",
"orcid": null
},
{
"name": "Frantz Martinache",
"orcid": null
},
{
"name": "Barnaby Norris",
"orcid": null
},
{
"name": "Peter Tuthill",
"orcid": null
}
] |
[
"astro-ph.IM"
] |
astro-ph.IM
|
Other
|
2014-01-29
|
2015-06-18
|
10.1093/mnras/stu218
| null |
9 pages, 6 figures
|
arXiv License
|
XML-ArXiv-OAI
|
In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path, or by imperfectly phased subapertures in a segmented mirror. Active and adaptive optics (AO), consisting of a wavefront sensor and a deformable mirror, are employed to address this problem. Nevertheless, the non-common-path between the wavefront sensor and the science camera leads to persistent quasi-static speckles that are difficult to calibrate and which impose a floor on the image contrast. In this paper we present the first experimental demonstration of a novel wavefront sensor requiring only a minor asymmetric obscuration of the pupil, using the science camera itself to detect high order wavefront errors from the speckle pattern produced. We apply this to correct errors imposed on a deformable microelectromechanical (MEMS) segmented mirror in a closed loop, restoring a high quality point spread function (PSF) and residual wavefront errors of order nm using 1600 nm light, from a starting point of nm in piston and mrad in tip-tilt. We recommend this as a method for measuring the non-common-path error in AO-equipped ground based telescopes, as well as as an approach to phasing difficult segmented mirrors such as on the primary and as a future direction for extreme adaptive optics.
|
[
"In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system",
"These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path, or by imperfectly phased subapertures in a segmented mirror",
"Active and adaptive optics (AO), consisting of a wavefront sensor and a deformable mirror, are employed to address this problem",
"Nevertheless, the non-common-path between the wavefront sensor and the science camera leads to persistent quasi-static speckles that are difficult to calibrate and which impose a floor on the image contrast",
"In this paper we present the first experimental demonstration of a novel wavefront sensor requiring only a minor asymmetric obscuration of the pupil, using the science camera itself to detect high order wavefront errors from the speckle pattern produced",
"We apply this to correct errors imposed on a deformable microelectromechanical (MEMS) segmented mirror in a closed loop, restoring a high quality point spread function (PSF) and residual wavefront errors of order nm using 1600 nm light, from a starting point of nm in piston and mrad in tip-tilt",
"We recommend this as a method for measuring the non-common-path error in AO-equipped ground based telescopes, as well as as an approach to phasing difficult segmented mirrors such as on the primary and as a future direction for extreme adaptive optics"
] | 7
|
[
"\\sim 10",
"\\sim 300",
"\\sim 0.3"
] | 3
| true
|
[] |
[] | 296
|
Title: A Demonstration of Wavefront Sensing and Mirror Phasing from the Image Domain
Categories: astro-ph.IM
Abstract: In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path, or by imperfectly phased subapertures in a segmented mirror. Active and adaptive optics (AO), consisting of a wavefront sensor and a deformable mirror, are employed to address this problem. Nevertheless, the non-common-path between the wavefront sensor and the science camera leads to persistent quasi-static speckles that are difficult to calibrate and which impose a floor on the image contrast. In this paper we present the first experimental demonstration of a novel wavefront sensor requiring only a minor asymmetric obscuration of the pupil, using the science camera itself to detect high order wavefront errors from the speckle pattern produced. We apply this to correct errors imposed on a deformable microelectromechanical (MEMS) segmented mirror in a closed loop, restoring a high quality point spread function (PSF) and residual wavefront errors of order nm using 1600 nm light, from a starting point of nm in piston and mrad in tip-tilt. We recommend this as a method for measuring the non-common-path error in AO-equipped ground based telescopes, as well as as an approach to phasing difficult segmented mirrors such as on the primary and as a future direction for extreme adaptive optics.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:cond-mat/9407045
| 1
|
New Criticality of 1D Fermions
|
One-dimensional massive quantum particles (or 1+1-dimensional random walks) with short-ranged multi-particle interactions are studied by exact renormalization group methods. With repulsive pair forces, such particles are known to scale as free fermions. With finite -body forces (m = 3,4,...), a critical instability is found, indicating the transition to a fermionic bound state. These unbinding transitions represent new universality classes of interacting fermions relevant to polymer and membrane systems. Implications for massless fermions, e.g. in the Hubbard model, are also noted. (to appear in Phys. Rev. Lett.)
|
[
{
"name": "M. Lassig",
"orcid": null
}
] |
[
"cond-mat"
] |
cond-mat
|
Other
|
1994-07-08
|
2015-06-25
|
10.1103/PhysRevLett.73.561
| null |
10 pages (latex), with 2 figures (not included)
|
arXiv License
|
XML-ArXiv-OAI
|
One-dimensional massive quantum particles (or 1+1-dimensional random walks) with short-ranged multi-particle interactions are studied by exact renormalization group methods. With repulsive pair forces, such particles are known to scale as free fermions. With finite -body forces (m = 3,4,...), a critical instability is found, indicating the transition to a fermionic bound state. These unbinding transitions represent new universality classes of interacting fermions relevant to polymer and membrane systems. Implications for massless fermions, e.g. in the Hubbard model, are also noted. (to appear in Phys. Rev. Lett.)
|
[
"One-dimensional massive quantum particles (or 1+1-dimensional random walks) with short-ranged multi-particle interactions are studied by exact renormalization group methods",
"With repulsive pair forces, such particles are known to scale as free fermions",
"With finite -body forces (m = 3,4,",
"), a critical instability is found, indicating the transition to a fermionic bound state",
"These unbinding transitions represent new universality classes of interacting fermions relevant to polymer and membrane systems",
"Implications for massless fermions, e",
"in the Hubbard model, are also noted"
] | 7
|
[
"m"
] | 1
| true
|
[] |
[] | 111
|
Title: New Criticality of 1D Fermions
Categories: cond-mat
Abstract: One-dimensional massive quantum particles (or 1+1-dimensional random walks) with short-ranged multi-particle interactions are studied by exact renormalization group methods. With repulsive pair forces, such particles are known to scale as free fermions. With finite -body forces (m = 3,4,...), a critical instability is found, indicating the transition to a fermionic bound state. These unbinding transitions represent new universality classes of interacting fermions relevant to polymer and membrane systems. Implications for massless fermions, e.g. in the Hubbard model, are also noted. (to appear in Phys. Rev. Lett.)
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0903.3012
| 1
|
Two-stage metal-insulator transition in the 2D Hubbard model: momentum selectivity in the 8-site dynamical cluster approximation
|
Metal-insulator transitions in the paramagnetic phase of the two dimensional square lattice Hubbard model are studied using the dynamical cluster approximation with eight momentum cells. We show that both the interaction-driven and the doping-driven transition are multi-stage and momentum-sector specific, with Fermi liquid metal and fully gapped insulator phases separated by an intermediate phase in which some regions of the Brillouin zone are gapped while others sustain gapless quasiparticles. We argue that this is the coarse-grained version of a gradually shrinking arc or pocket. A pronounced particle-hole asymmetry is found.
|
[
{
"name": "Philipp Werner",
"orcid": null
},
{
"name": "Emanuel Gull",
"orcid": null
},
{
"name": "Olivier Parcollet",
"orcid": null
},
{
"name": "Andrew J. Millis",
"orcid": null
}
] |
[
"cond-mat.str-el"
] |
cond-mat.str-el
|
Other
|
2009-03-17
|
2009-12-01
|
10.1103/PhysRevB.80.045120
|
Phys. Rev. B 80, 045120 (2009)
| null |
arXiv License
|
XML-ArXiv-OAI
|
Metal-insulator transitions in the paramagnetic phase of the two dimensional square lattice Hubbard model are studied using the dynamical cluster approximation with eight momentum cells. We show that both the interaction-driven and the doping-driven transition are multi-stage and momentum-sector specific, with Fermi liquid metal and fully gapped insulator phases separated by an intermediate phase in which some regions of the Brillouin zone are gapped while others sustain gapless quasiparticles. We argue that this is the coarse-grained version of a gradually shrinking arc or pocket. A pronounced particle-hole asymmetry is found.
|
[
"Metal-insulator transitions in the paramagnetic phase of the two dimensional square lattice Hubbard model are studied using the dynamical cluster approximation with eight momentum cells",
"We show that both the interaction-driven and the doping-driven transition are multi-stage and momentum-sector specific, with Fermi liquid metal and fully gapped insulator phases separated by an intermediate phase in which some regions of the Brillouin zone are gapped while others sustain gapless quasiparticles",
"We argue that this is the coarse-grained version of a gradually shrinking arc or pocket",
"A pronounced particle-hole asymmetry is found"
] | 4
|
[] | 0
| false
|
[] |
[] | 117
|
Title: Two-stage metal-insulator transition in the 2D Hubbard model: momentum selectivity in the 8-site dynamical cluster approximation
Categories: cond-mat.str-el
Abstract: Metal-insulator transitions in the paramagnetic phase of the two dimensional square lattice Hubbard model are studied using the dynamical cluster approximation with eight momentum cells. We show that both the interaction-driven and the doping-driven transition are multi-stage and momentum-sector specific, with Fermi liquid metal and fully gapped insulator phases separated by an intermediate phase in which some regions of the Brillouin zone are gapped while others sustain gapless quasiparticles. We argue that this is the coarse-grained version of a gradually shrinking arc or pocket. A pronounced particle-hole asymmetry is found.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0711.4918
| 1
|
Microscopic heat from the energetics of stochastic phenomena
|
The energetics of the stochastic process has shown the balance of energy on the mesoscopic level. The heat and the energy defined there are, however, generally different from their macroscopic counterpart. We show that this discrepancy can be removed by adding to these quantities the reversible heat associated with the mesoscopic free energy.
|
[
{
"name": "Ken Sekimoto",
"orcid": null
}
] |
[
"cond-mat.stat-mech"
] |
cond-mat.stat-mech
|
Other
|
2007-11-30
|
2009-12-01
|
10.1103/PhysRevE.76.060103
| null |
4 pages, 0 figure
|
arXiv License
|
XML-ArXiv-OAI
|
The energetics of the stochastic process has shown the balance of energy on the mesoscopic level. The heat and the energy defined there are, however, generally different from their macroscopic counterpart. We show that this discrepancy can be removed by adding to these quantities the reversible heat associated with the mesoscopic free energy.
|
[
"The energetics of the stochastic process has shown the balance of energy on the mesoscopic level",
"The heat and the energy defined there are, however, generally different from their macroscopic counterpart",
"We show that this discrepancy can be removed by adding to these quantities the reversible heat associated with the mesoscopic free energy"
] | 3
|
[] | 0
| false
|
[] |
[] | 68
|
Title: Microscopic heat from the energetics of stochastic phenomena
Categories: cond-mat.stat-mech
Abstract: The energetics of the stochastic process has shown the balance of energy on the mesoscopic level. The heat and the energy defined there are, however, generally different from their macroscopic counterpart. We show that this discrepancy can be removed by adding to these quantities the reversible heat associated with the mesoscopic free energy.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1312.4596
| 1
|
A note on error estimation for hypothesis testing problems for some linear SPDEs
|
The aim of the present paper is to estimate and control the Type I and Type II errors of a simple hypothesis testing problem of the drift/viscosity coefficient for stochastic fractional heat equation driven by additive noise. Assuming that one path of the first Fourier modes of the solution is observed continuously over a finite time interval , we propose a new class of rejection regions and provide computable thresholds for , and , that guarantee that the statistical errors are smaller than a given upper bound. The considered tests are of likelihood ratio type. The main ideas, and the proofs, are based on sharp large deviation bounds. Finally, we illustrate the theoretical results by numerical simulations.
|
[
{
"name": "Igor Cialenco",
"orcid": null
},
{
"name": "Liaosha Xu",
"orcid": null
}
] |
[
"math.PR",
"math.ST",
"stat.TH"
] |
math.PR
|
Mathematics
|
2014-07-21
|
2014-07-22
| null | null |
Forthcoming in Stochastic Partial Differential Equations: Analysis and Computations
|
arXiv License
|
XML-ArXiv-OAI
|
The aim of the present paper is to estimate and control the Type I and Type II errors of a simple hypothesis testing problem of the drift/viscosity coefficient for stochastic fractional heat equation driven by additive noise. Assuming that one path of the first Fourier modes of the solution is observed continuously over a finite time interval , we propose a new class of rejection regions and provide computable thresholds for , and , that guarantee that the statistical errors are smaller than a given upper bound. The considered tests are of likelihood ratio type. The main ideas, and the proofs, are based on sharp large deviation bounds. Finally, we illustrate the theoretical results by numerical simulations.
|
[
"The aim of the present paper is to estimate and control the Type I and Type II errors of a simple hypothesis testing problem of the drift/viscosity coefficient for stochastic fractional heat equation driven by additive noise",
"Assuming that one path of the first Fourier modes of the solution is observed continuously over a finite time interval , we propose a new class of rejection regions and provide computable thresholds for , and , that guarantee that the statistical errors are smaller than a given upper bound",
"The considered tests are of likelihood ratio type",
"The main ideas, and the proofs, are based on sharp large deviation bounds",
"Finally, we illustrate the theoretical results by numerical simulations"
] | 5
|
[
"N",
"[0,T]",
"T",
"N"
] | 4
| true
|
[] |
[] | 152
|
Title: A note on error estimation for hypothesis testing problems for some linear SPDEs
Categories: math.PR, math.ST, stat.TH
Abstract: The aim of the present paper is to estimate and control the Type I and Type II errors of a simple hypothesis testing problem of the drift/viscosity coefficient for stochastic fractional heat equation driven by additive noise. Assuming that one path of the first Fourier modes of the solution is observed continuously over a finite time interval , we propose a new class of rejection regions and provide computable thresholds for , and , that guarantee that the statistical errors are smaller than a given upper bound. The considered tests are of likelihood ratio type. The main ideas, and the proofs, are based on sharp large deviation bounds. Finally, we illustrate the theoretical results by numerical simulations.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:math/0302257
| 1
|
Juggling probabilities
|
The act of a person juggling can be viewed as a Markov process if we assume that the juggler throws to random heights. I make this association for the simplest reasonable model of random juggling and compute the steady state probabilities in terms of the Stirling numbers of the second kind. I also explore several alternate models of juggling.
|
[
{
"name": "Gregory S. Warrington",
"orcid": null
}
] |
[
"math.PR",
"math.CO"
] |
math.PR
|
Mathematics
|
2003-02-20
|
2009-11-30
| null | null |
11 pages, 5 eps figures. psfrag
|
arXiv License
|
XML-ArXiv-OAI
|
The act of a person juggling can be viewed as a Markov process if we assume that the juggler throws to random heights. I make this association for the simplest reasonable model of random juggling and compute the steady state probabilities in terms of the Stirling numbers of the second kind. I also explore several alternate models of juggling.
|
[
"The act of a person juggling can be viewed as a Markov process if we assume that the juggler throws to random heights",
"I make this association for the simplest reasonable model of random juggling and compute the steady state probabilities in terms of the Stirling numbers of the second kind",
"I also explore several alternate models of juggling"
] | 3
|
[] | 0
| false
|
[] |
[] | 76
|
Title: Juggling probabilities
Categories: math.PR, math.CO
Abstract: The act of a person juggling can be viewed as a Markov process if we assume that the juggler throws to random heights. I make this association for the simplest reasonable model of random juggling and compute the steady state probabilities in terms of the Stirling numbers of the second kind. I also explore several alternate models of juggling.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1309.4290
| 1
|
Simple free-surface detection in two and three-dimensional SPH solver
|
A simple free-surface particle detection method for two and three-dimensional SPH simulation has been implemented. The method uses sphere representation for the SPH particle. The fluid domain is covered by overlapping spheres. A sphere whose surface is not fully covered considered as boundary. To test particle boundary status, we used a sum of normalized relative position vectors from neighbouring particles to the test particle. By checking the existence of un- covered sphere surface by this vector sum, boundary status of the test particle can be determined. This boundary detection method can be easily embedded in the SPH solver algorithm.
|
[
{
"name": "Agra Barecasco",
"orcid": null
},
{
"name": "Hanifa Terissa",
"orcid": null
},
{
"name": "Christian Fredy Naa",
"orcid": null
}
] |
[
"physics.flu-dyn",
"physics.comp-ph"
] |
physics.flu-dyn
|
Physics
|
2013-09-17
|
2013-09-18
| null | null |
10 pages, 11 figures, Selected Paper from the International Symposium on Computational Science 2013
|
CC BY
|
XML-ArXiv-OAI
|
A simple free-surface particle detection method for two and three-dimensional SPH simulation has been implemented. The method uses sphere representation for the SPH particle. The fluid domain is covered by overlapping spheres. A sphere whose surface is not fully covered considered as boundary. To test particle boundary status, we used a sum of normalized relative position vectors from neighbouring particles to the test particle. By checking the existence of un- covered sphere surface by this vector sum, boundary status of the test particle can be determined. This boundary detection method can be easily embedded in the SPH solver algorithm.
|
[
"A simple free-surface particle detection method for two and three-dimensional SPH simulation has been implemented",
"The method uses sphere representation for the SPH particle",
"The fluid domain is covered by overlapping spheres",
"A sphere whose surface is not fully covered considered as boundary",
"To test particle boundary status, we used a sum of normalized relative position vectors from neighbouring particles to the test particle",
"By checking the existence of un- covered sphere surface by this vector sum, boundary status of the test particle can be determined",
"This boundary detection method can be easily embedded in the SPH solver algorithm"
] | 7
|
[] | 0
| false
|
[] |
[] | 128
|
Title: Simple free-surface detection in two and three-dimensional SPH solver
Categories: physics.flu-dyn, physics.comp-ph
Abstract: A simple free-surface particle detection method for two and three-dimensional SPH simulation has been implemented. The method uses sphere representation for the SPH particle. The fluid domain is covered by overlapping spheres. A sphere whose surface is not fully covered considered as boundary. To test particle boundary status, we used a sum of normalized relative position vectors from neighbouring particles to the test particle. By checking the existence of un- covered sphere surface by this vector sum, boundary status of the test particle can be determined. This boundary detection method can be easily embedded in the SPH solver algorithm.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1402.5245
| 1
|
New results on a generalized coupon collector problem using Markov chains
|
We study in this paper a generalized coupon collector problem, which consists in determining the distribution and the moments of the time needed to collect a given number of distinct coupons that are drawn from a set of coupons with an arbitrary probability distribution. We suppose that a special coupon called the null coupon can be drawn but never belongs to any collection. In this context, we obtain expressions of the distribution and the moments of this time. We also prove that the almost-uniform distribution, for which all the non-null coupons have the same drawing probability, is the distribution which minimizes the expected time to get a fixed subset of distinct coupons. This optimization result is extended to the complementary distribution of that time when the full collection is considered, proving by the way this well-known conjecture. Finally, we propose a new conjecture which expresses the fact that the almost-uniform distribution should minimize the complementary distribution of the time needed to get any fixed number of distinct coupons.
|
[
{
"name": "Emmanuelle Anceaume",
"orcid": null
},
{
"name": "Yann Busnel",
"orcid": null
},
{
"name": "Bruno Sericola",
"orcid": null
}
] |
[
"math.PR",
"cs.DM"
] |
math.PR
|
Mathematics
|
2014-02-21
|
2014-02-24
| null | null |
14 pages
|
arXiv License
|
XML-ArXiv-OAI
|
We study in this paper a generalized coupon collector problem, which consists in determining the distribution and the moments of the time needed to collect a given number of distinct coupons that are drawn from a set of coupons with an arbitrary probability distribution. We suppose that a special coupon called the null coupon can be drawn but never belongs to any collection. In this context, we obtain expressions of the distribution and the moments of this time. We also prove that the almost-uniform distribution, for which all the non-null coupons have the same drawing probability, is the distribution which minimizes the expected time to get a fixed subset of distinct coupons. This optimization result is extended to the complementary distribution of that time when the full collection is considered, proving by the way this well-known conjecture. Finally, we propose a new conjecture which expresses the fact that the almost-uniform distribution should minimize the complementary distribution of the time needed to get any fixed number of distinct coupons.
|
[
"We study in this paper a generalized coupon collector problem, which consists in determining the distribution and the moments of the time needed to collect a given number of distinct coupons that are drawn from a set of coupons with an arbitrary probability distribution",
"We suppose that a special coupon called the null coupon can be drawn but never belongs to any collection",
"In this context, we obtain expressions of the distribution and the moments of this time",
"We also prove that the almost-uniform distribution, for which all the non-null coupons have the same drawing probability, is the distribution which minimizes the expected time to get a fixed subset of distinct coupons",
"This optimization result is extended to the complementary distribution of that time when the full collection is considered, proving by the way this well-known conjecture",
"Finally, we propose a new conjecture which expresses the fact that the almost-uniform distribution should minimize the complementary distribution of the time needed to get any fixed number of distinct coupons"
] | 6
|
[] | 0
| false
|
[] |
[] | 218
|
Title: New results on a generalized coupon collector problem using Markov chains
Categories: math.PR, cs.DM
Abstract: We study in this paper a generalized coupon collector problem, which consists in determining the distribution and the moments of the time needed to collect a given number of distinct coupons that are drawn from a set of coupons with an arbitrary probability distribution. We suppose that a special coupon called the null coupon can be drawn but never belongs to any collection. In this context, we obtain expressions of the distribution and the moments of this time. We also prove that the almost-uniform distribution, for which all the non-null coupons have the same drawing probability, is the distribution which minimizes the expected time to get a fixed subset of distinct coupons. This optimization result is extended to the complementary distribution of that time when the full collection is considered, proving by the way this well-known conjecture. Finally, we propose a new conjecture which expresses the fact that the almost-uniform distribution should minimize the complementary distribution of the time needed to get any fixed number of distinct coupons.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:0808.3415
| 1
|
On the Cayley semigroup of a finite aperiodic semigroup
|
Let be a finite semigroup. In this paper we introduce the functions , first defined by Rhodes, given by . We show that if is a finite aperiodic semigroup, then the semigroup generated by the functions is finite and aperiodic.
|
[
{
"name": "Avi Mintz",
"orcid": null
}
] |
[
"math.GR"
] |
math.GR
|
Mathematics
|
2008-08-25
|
2009-12-01
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
Let be a finite semigroup. In this paper we introduce the functions , first defined by Rhodes, given by . We show that if is a finite aperiodic semigroup, then the semigroup generated by the functions is finite and aperiodic.
|
[
"Let be a finite semigroup",
"In this paper we introduce the functions , first defined by Rhodes, given by",
"We show that if is a finite aperiodic semigroup, then the semigroup generated by the functions is finite and aperiodic"
] | 3
|
[
"S",
"ϕ_s:S^* \\to S^*",
"ϕ_s([a_1,a_2 ,...,a_n]) = [sa_1,sa_1a_2,..., sa_1a_2 ... a_n]",
"S",
"\\{ϕ_s\\}_{s \\in S}"
] | 5
| true
|
[] |
[] | 52
|
Title: On the Cayley semigroup of a finite aperiodic semigroup
Categories: math.GR
Abstract: Let be a finite semigroup. In this paper we introduce the functions , first defined by Rhodes, given by . We show that if is a finite aperiodic semigroup, then the semigroup generated by the functions is finite and aperiodic.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1301.3564
| 1
|
Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking
|
We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally. Taking p-orbital-based toy model for analysis, we find the Kondo pairing symmetry of p-wave character emerges self-consistently over some regions of parameter space and filling factor even though only the on-site Kondo hybridization is assumed in the microscopic Hamiltonian. The band structure in the Kondo-hybridized phase becomes nematic, with only two-fold symmetry, due to the p-wave Kondo coupling. The reduced symmetry should be readily observable in spectroscopic or transport measurements for heavy fermion system in a multilayer environment such as successfully grown recently.
|
[
{
"name": "Jun Won Rhim",
"orcid": null
},
{
"name": "Jung Hoon Han",
"orcid": null
}
] |
[
"cond-mat.str-el"
] |
cond-mat.str-el
|
Other
|
2013-01-16
|
2013-09-10
|
10.7566/JPSJ.82.104704
|
J. Phys. Soc. Jpn. 82 (2013) 104704
|
5 pages, 4 figures
|
arXiv License
|
XML-ArXiv-OAI
|
We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally. Taking p-orbital-based toy model for analysis, we find the Kondo pairing symmetry of p-wave character emerges self-consistently over some regions of parameter space and filling factor even though only the on-site Kondo hybridization is assumed in the microscopic Hamiltonian. The band structure in the Kondo-hybridized phase becomes nematic, with only two-fold symmetry, due to the p-wave Kondo coupling. The reduced symmetry should be readily observable in spectroscopic or transport measurements for heavy fermion system in a multilayer environment such as successfully grown recently.
|
[
"We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally",
"Taking p-orbital-based toy model for analysis, we find the Kondo pairing symmetry of p-wave character emerges self-consistently over some regions of parameter space and filling factor even though only the on-site Kondo hybridization is assumed in the microscopic Hamiltonian",
"The band structure in the Kondo-hybridized phase becomes nematic, with only two-fold symmetry, due to the p-wave Kondo coupling",
"The reduced symmetry should be readily observable in spectroscopic or transport measurements for heavy fermion system in a multilayer environment such as successfully grown recently"
] | 4
|
[] | 0
| false
|
[] |
[] | 143
|
Title: Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking
Categories: cond-mat.str-el
Abstract: We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally. Taking p-orbital-based toy model for analysis, we find the Kondo pairing symmetry of p-wave character emerges self-consistently over some regions of parameter space and filling factor even though only the on-site Kondo hybridization is assumed in the microscopic Hamiltonian. The band structure in the Kondo-hybridized phase becomes nematic, with only two-fold symmetry, due to the p-wave Kondo coupling. The reduced symmetry should be readily observable in spectroscopic or transport measurements for heavy fermion system in a multilayer environment such as successfully grown recently.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1411.6323
| 1
|
Metric characterization of connectedness for topological spaces
|
Connectedness, path connectedness, and uniform connectedness are well-known concepts. In the traditional presentation of these concepts there is a substantial difference between connectedness and the other two notions, namely connectedness is defined as the absence of disconnectedness, while path connectedness and uniform connectedness are defined in terms of connecting paths and connecting chains, respectively. In compact metric spaces uniform connectedness and connectedness are well-known to coincide, thus the apparent conceptual difference between the two notions disappears. Connectedness in topological spaces can also be defined in terms of chains governed by open coverings in a manner that is more reminiscent of path connectedness. We present a unifying metric formalism for connectedness, which encompasses both connectedness of topological spaces and uniform connectedness of uniform spaces, and which further extends to a hierarchy of notions of connectedness.
|
[
{
"name": "Ittay Weiss",
"orcid": null
}
] |
[
"math.GN"
] |
math.GN
|
Mathematics
|
2015-11-05
|
2015-11-06
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
Connectedness, path connectedness, and uniform connectedness are well-known concepts. In the traditional presentation of these concepts there is a substantial difference between connectedness and the other two notions, namely connectedness is defined as the absence of disconnectedness, while path connectedness and uniform connectedness are defined in terms of connecting paths and connecting chains, respectively. In compact metric spaces uniform connectedness and connectedness are well-known to coincide, thus the apparent conceptual difference between the two notions disappears. Connectedness in topological spaces can also be defined in terms of chains governed by open coverings in a manner that is more reminiscent of path connectedness. We present a unifying metric formalism for connectedness, which encompasses both connectedness of topological spaces and uniform connectedness of uniform spaces, and which further extends to a hierarchy of notions of connectedness.
|
[
"Connectedness, path connectedness, and uniform connectedness are well-known concepts",
"In the traditional presentation of these concepts there is a substantial difference between connectedness and the other two notions, namely connectedness is defined as the absence of disconnectedness, while path connectedness and uniform connectedness are defined in terms of connecting paths and connecting chains, respectively",
"In compact metric spaces uniform connectedness and connectedness are well-known to coincide, thus the apparent conceptual difference between the two notions disappears",
"Connectedness in topological spaces can also be defined in terms of chains governed by open coverings in a manner that is more reminiscent of path connectedness",
"We present a unifying metric formalism for connectedness, which encompasses both connectedness of topological spaces and uniform connectedness of uniform spaces, and which further extends to a hierarchy of notions of connectedness"
] | 5
|
[] | 0
| false
|
[] |
[] | 174
|
Title: Metric characterization of connectedness for topological spaces
Categories: math.GN
Abstract: Connectedness, path connectedness, and uniform connectedness are well-known concepts. In the traditional presentation of these concepts there is a substantial difference between connectedness and the other two notions, namely connectedness is defined as the absence of disconnectedness, while path connectedness and uniform connectedness are defined in terms of connecting paths and connecting chains, respectively. In compact metric spaces uniform connectedness and connectedness are well-known to coincide, thus the apparent conceptual difference between the two notions disappears. Connectedness in topological spaces can also be defined in terms of chains governed by open coverings in a manner that is more reminiscent of path connectedness. We present a unifying metric formalism for connectedness, which encompasses both connectedness of topological spaces and uniform connectedness of uniform spaces, and which further extends to a hierarchy of notions of connectedness.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:hep-ph/0512068
| 1
|
Phenomenological and Cosmological Aspects of a Minimal GUT Scenario
|
Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied. It is shown that the constraints coming from the unification of gauge interactions up to two-loop level predict light scalar leptoquarks. In this GUT scenario, the upper bound on the total proton decay lifetime is tau_p < 1.4 x 10^36 years. The possibility to explain the matter-antimatter asymmetry in the universe through the decays of SU(2)_L scalar triplets is also studied. We find that a successful triplet seesaw leptogenesis implies an upper bound on the scalar leptoquark mass, M_Phib < 10^{6-7} GeV. We conclude that this GUT scenario can be tested at the next generation of proton decay experiments and future colliders through the production of scalar leptoquarks.
|
[
{
"name": "Ilja Dorsner",
"orcid": null
},
{
"name": "Pavel Fileviez Perez",
"orcid": null
},
{
"name": "Ricardo Gonzalez Felipe",
"orcid": null
}
] |
[
"hep-ph",
"astro-ph"
] |
hep-ph
|
Other
|
2005-12-05
|
2009-12-01
|
10.1016/j.nuclphysb.2006.05.006
|
Nucl.Phys.B747:312-327,2006
|
20 pages, 3 eps figures
|
arXiv License
|
XML-ArXiv-OAI
|
Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied. It is shown that the constraints coming from the unification of gauge interactions up to two-loop level predict light scalar leptoquarks. In this GUT scenario, the upper bound on the total proton decay lifetime is tau_p < 1.4 x 10^36 years. The possibility to explain the matter-antimatter asymmetry in the universe through the decays of SU(2)_L scalar triplets is also studied. We find that a successful triplet seesaw leptogenesis implies an upper bound on the scalar leptoquark mass, M_Phib < 10^{6-7} GeV. We conclude that this GUT scenario can be tested at the next generation of proton decay experiments and future colliders through the production of scalar leptoquarks.
|
[
"Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied",
"It is shown that the constraints coming from the unification of gauge interactions up to two-loop level predict light scalar leptoquarks",
"In this GUT scenario, the upper bound on the total proton decay lifetime is tau_p < 1",
"The possibility to explain the matter-antimatter asymmetry in the universe through the decays of SU(2)_L scalar triplets is also studied",
"We find that a successful triplet seesaw leptogenesis implies an upper bound on the scalar leptoquark mass, M_Phib < 10^{6-7} GeV",
"We conclude that this GUT scenario can be tested at the next generation of proton decay experiments and future colliders through the production of scalar leptoquarks"
] | 6
|
[] | 0
| false
|
[] |
[] | 174
|
Title: Phenomenological and Cosmological Aspects of a Minimal GUT Scenario
Categories: hep-ph, astro-ph
Abstract: Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied. It is shown that the constraints coming from the unification of gauge interactions up to two-loop level predict light scalar leptoquarks. In this GUT scenario, the upper bound on the total proton decay lifetime is tau_p < 1.4 x 10^36 years. The possibility to explain the matter-antimatter asymmetry in the universe through the decays of SU(2)_L scalar triplets is also studied. We find that a successful triplet seesaw leptogenesis implies an upper bound on the scalar leptoquark mass, M_Phib < 10^{6-7} GeV. We conclude that this GUT scenario can be tested at the next generation of proton decay experiments and future colliders through the production of scalar leptoquarks.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1310.0665
| 1
|
Protected nodes and fringe subtrees in some random trees
|
We study protected nodes in various classes of random rooted trees by putting them in the general context of fringe subtrees introduced by Aldous (1991). Several types of random trees are considered: simply generated trees (or conditioned Galton-Watson trees), which includes several cases treated separately by other authors, binary search trees and random recursive trees. This gives unified and simple proofs of several earlier results, as well as new results.
|
[
{
"name": "Luc Devroye",
"orcid": null
},
{
"name": "Svante Janson",
"orcid": null
}
] |
[
"math.PR",
"math.CO"
] |
math.PR
|
Mathematics
|
2013-10-02
|
2013-10-03
| null | null |
11 pages
|
arXiv License
|
XML-ArXiv-OAI
|
We study protected nodes in various classes of random rooted trees by putting them in the general context of fringe subtrees introduced by Aldous (1991). Several types of random trees are considered: simply generated trees (or conditioned Galton-Watson trees), which includes several cases treated separately by other authors, binary search trees and random recursive trees. This gives unified and simple proofs of several earlier results, as well as new results.
|
[
"We study protected nodes in various classes of random rooted trees by putting them in the general context of fringe subtrees introduced by Aldous (1991)",
"Several types of random trees are considered: simply generated trees (or conditioned Galton-Watson trees), which includes several cases treated separately by other authors, binary search trees and random recursive trees",
"This gives unified and simple proofs of several earlier results, as well as new results"
] | 3
|
[] | 0
| false
|
[] |
[] | 91
|
Title: Protected nodes and fringe subtrees in some random trees
Categories: math.PR, math.CO
Abstract: We study protected nodes in various classes of random rooted trees by putting them in the general context of fringe subtrees introduced by Aldous (1991). Several types of random trees are considered: simply generated trees (or conditioned Galton-Watson trees), which includes several cases treated separately by other authors, binary search trees and random recursive trees. This gives unified and simple proofs of several earlier results, as well as new results.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1402.0405
| 1
|
Generators and relations of the graded algebra of modular forms
|
We give bounds on the degree of generators for the ideal of relations of the graded algebras of modular forms with coefficients in over congruence subgroups for satisfying some congruence conditions and for . We give similar bounds for the graded -algebra of modular forms on with coefficients in . For a prime , we give a lower bound on the highest weight appearing in a minimal list of generators for , and we identify a set of generators for the graded algebra of modular forms over with coefficients in , showing that this weight is unbounded. We generalize a result of Serre concerning congruences between modular forms over and , and use it to identify a set of generators for , and we state two conjectures detailing further the structure of this algebra. Finally we provide computations concerning the number of generators and relations for each of these algebras, as well as computational evidence for these conjectures.
|
[
{
"name": "Nadim Rustom",
"orcid": null
}
] |
[
"math.NT"
] |
math.NT
|
Mathematics
|
2014-02-03
|
2016-03-07
|
10.1007/s11139-015-9674-z
|
Ramanujan J. 39 (2016), no. 2, 315--338
| null |
arXiv License
|
XML-ArXiv-OAI
|
We give bounds on the degree of generators for the ideal of relations of the graded algebras of modular forms with coefficients in over congruence subgroups for satisfying some congruence conditions and for . We give similar bounds for the graded -algebra of modular forms on with coefficients in . For a prime , we give a lower bound on the highest weight appearing in a minimal list of generators for , and we identify a set of generators for the graded algebra of modular forms over with coefficients in , showing that this weight is unbounded. We generalize a result of Serre concerning congruences between modular forms over and , and use it to identify a set of generators for , and we state two conjectures detailing further the structure of this algebra. Finally we provide computations concerning the number of generators and relations for each of these algebras, as well as computational evidence for these conjectures.
|
[
"We give bounds on the degree of generators for the ideal of relations of the graded algebras of modular forms with coefficients in over congruence subgroups for satisfying some congruence conditions and for",
"We give similar bounds for the graded -algebra of modular forms on with coefficients in",
"For a prime , we give a lower bound on the highest weight appearing in a minimal list of generators for , and we identify a set of generators for the graded algebra of modular forms over with coefficients in , showing that this weight is unbounded",
"We generalize a result of Serre concerning congruences between modular forms over and , and use it to identify a set of generators for , and we state two conjectures detailing further the structure of this algebra",
"Finally we provide computations concerning the number of generators and relations for each of these algebras, as well as computational evidence for these conjectures"
] | 5
|
[
"\\mathbb{Q}",
"Γ_0(N)",
"N",
"Γ_1(N)",
"\\mathbb{Z}[\\frac{1}{N}]",
"Γ_1(N)",
"\\mathbb{Z}[\\frac{1}{N}]",
"p \\geq 5",
"Γ_0(p)",
"M(Γ_0(p),\\mathbb{Z})",
"Γ_0(p)",
"\\mathbb{Z}",
"Γ_0(p)",
"SL_2(\\mathbb{Z})",
"M(Γ_0(p),\\mathbb{Z})"
] | 15
| true
|
[] |
[] | 205
|
Title: Generators and relations of the graded algebra of modular forms
Categories: math.NT
Abstract: We give bounds on the degree of generators for the ideal of relations of the graded algebras of modular forms with coefficients in over congruence subgroups for satisfying some congruence conditions and for . We give similar bounds for the graded -algebra of modular forms on with coefficients in . For a prime , we give a lower bound on the highest weight appearing in a minimal list of generators for , and we identify a set of generators for the graded algebra of modular forms over with coefficients in , showing that this weight is unbounded. We generalize a result of Serre concerning congruences between modular forms over and , and use it to identify a set of generators for , and we state two conjectures detailing further the structure of this algebra. Finally we provide computations concerning the number of generators and relations for each of these algebras, as well as computational evidence for these conjectures.
|
gold
|
perfect
|
Made by Zeronex
|
arXiv:1009.2625
| 1
|
On some characterizations of ruled surface of a closed timelike curve in dual Lorentzian space
|
In this paper, we investigate the relations between the pitch, the angle of pitch and drall of parallel ruled surface of a closed curve in dual Lorentzian space.
|
[
{
"name": "Ozcan Bektas",
"orcid": null
},
{
"name": "Suleyman Senyurt",
"orcid": null
}
] |
[
"math.DG"
] |
math.DG
|
Mathematics
|
2010-09-14
|
2010-09-15
| null | null | null |
arXiv License
|
XML-ArXiv-OAI
|
In this paper, we investigate the relations between the pitch, the angle of pitch and drall of parallel ruled surface of a closed curve in dual Lorentzian space.
|
[
"In this paper, we investigate the relations between the pitch, the angle of pitch and drall of parallel ruled surface of a closed curve in dual Lorentzian space"
] | 1
|
[] | 0
| false
|
[] |
[] | 36
|
Title: On some characterizations of ruled surface of a closed timelike curve in dual Lorentzian space
Categories: math.DG
Abstract: In this paper, we investigate the relations between the pitch, the angle of pitch and drall of parallel ruled surface of a closed curve in dual Lorentzian space.
|
gold
|
perfect
|
Made by Zeronex
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.