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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
|
End of preview. Expand
in Data Studio
⭐ README — ZERONEX SCIENTIFIC CORPUS (1M CLEAN JSON)
(Made by Zeronex — 2025 Edition)
🚀 Overview
This release contains one of the cleanest scientific corpora ever published. No noise. No XML leftovers. No broken paragraphs. Every file is fully normalized, token-ready, embedding-ready, and AI-training-ready.
All files are professionally structured JSON, signature-stamped, and extracted from scientific metadata with gold-level cleaning rules.
This drop includes:
1️⃣ The MASSIVE 1,000,000 Sample Corpus
A fully cleaned scientific dataset containing:
1,000,000 normalized JSON files
Full abstracts
Metadata
Authors
Categories
Clean paragraphs
Token estimates
Structured fields
Consistent formatting
Unified naming
Signature: "Made by Zeronex"
Every file follows the same perfect schema, with no exceptions.
2️⃣ Sorted Category Files
A second dataset containing category-specific filtered corpora, automatically split by top-level scientific fields:
Examples:
physics.json
quant-ph.json
hep-th.json
astro-ph.json
q-fin.json
etc.
Each file contains only clean, validated entries matching the scientific domain.
This makes it extremely easy to build:
specialized LLMs
domain-specific embeddings
fine-tuned models
retrieval systems
scientific RAG pipelines
3️⃣ Train-Ready Splits
Included:
train.json
valid.json
test.json
Perfectly balanced. No duplicates. No contamination. Totally cleaned. Ready for:
supervised fine-tuning
continued pretraining
embedding model training
scientific QA systems
autoregressive language modeling
These splits are engineered to be plug-and-play for any ML framework (PyTorch, HF Transformers, JAX, etc.).
🔥 Data Quality
This corpus is designed with an industrial-grade cleaning standard, featuring:
✔ No broken text ✔ No incomplete sentences ✔ No XML/HTML noise ✔ No parsing artifacts ✔ Consistent metadata ✔ Robust JSON schema ✔ Perfect normalization ✔ Clean paragraphs ✔ Math extraction support ✔ Subject classification ✔ Zero mixing across domains ✔ Seamless loading at scale ✔ Embedded signature: "Made by Zeronex"
This is not a raw dump. This is not a scraped mess. This is a professional-grade scientific dataset, built to train real models.
⚡ Why This Drop Matters
This dataset can be used immediately for:
LLM pretraining
Domain fine-tuning
RAG systems
Scientific summarization
Research chatbots
Knowledge extraction
Embedding model training
Topic modeling
Graph building
Multi-domain AI assistants
This is the type of corpus used in high-level research labs.
🧬 Signature
Every file includes:
"signature": "Made by Zeronex"
This certifies provenance and protects against dataset plagiarism.
📦 Contents 📁 SampleArXiv_1M/ │── 1M_json_papers/ # main dataset (1,000,000 files) │── categories/ # domain-filtered datasets │── train.json # train split (ready to use) │── valid.json # validation split │── test.json # test split │── README.md # this file
🏁 Final Notes
This is a teaser drop. The full, extended corpus (many millions more) will be released only if this work is shared, supported, and credited properly.
If you use this dataset, please cite the creator:
“Dataset cleaned and structured by Zeronex (2025).”
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