id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0802.1376 | Andres Rodriguez | Andres Rodriguez | Reducing False Alarms in Searches for Gravitational Waves from
Coalescing Binary Systems | 70 pages, 30 figures | M.S. Thesis (Advisor: Prof. Gabriela Gonzalez), Louisiana State
University, 2007 | null | LIGO-P070056-00-Z | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LIGO observatories in Livingston, LA and Hanford, WA may detect gravitational
waves emitted from coalescing binary systems composed of two compact objects.
In order to detect compact binary coalescence (CBC) events, LIGO searches
utilize matched filtering techniques. Matched filtering is the optimal
detection strateg... | [
{
"created": "Sun, 10 Feb 2008 19:51:08 GMT",
"version": "v1"
}
] | 2008-02-12 | [
[
"Rodriguez",
"Andres",
""
]
] | LIGO observatories in Livingston, LA and Hanford, WA may detect gravitational waves emitted from coalescing binary systems composed of two compact objects. In order to detect compact binary coalescence (CBC) events, LIGO searches utilize matched filtering techniques. Matched filtering is the optimal detection strategy ... |
1103.1728 | Izzet Sakalli | I. Sakalli | Dilatonic Entropic Force | In v1 the figure was missing; It is fixed; to be appeared in IJTP,
2011 | Int.J.Theor.Phys.50:2426-2437,2011 | 10.1007/s10773-011-0731-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show in detail that the entropic force of the static spherically symmetric
spacetimes with unusual asymptotics can be calculated through the Verlinde's
arguments. We introduce three different holographic screen candidates, which
are first employed thoroughly by Myung and Kim [Phys. Rev. D 81, 105012 (2010)]
for Sc... | [
{
"created": "Wed, 9 Mar 2011 08:11:39 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Mar 2011 11:31:23 GMT",
"version": "v2"
}
] | 2011-06-28 | [
[
"Sakalli",
"I.",
""
]
] | We show in detail that the entropic force of the static spherically symmetric spacetimes with unusual asymptotics can be calculated through the Verlinde's arguments. We introduce three different holographic screen candidates, which are first employed thoroughly by Myung and Kim [Phys. Rev. D 81, 105012 (2010)] for Schw... |
0812.4007 | Paulo Roberto Silva | Paulo Roberto Silva | Cosmological Constant and Polymer Physics | 6 pages, no figures | Braz.J.Phys.38:587-590,2008 | 10.1590/S0103-97332008000500010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is traced out a parallel between the cosmological constant problem and the
polymer physics. The time evolution of the universe world line is compared with
the growing of a polymer chain. An equivalent Flory free energy and a
modification of it are used as a means to evaluate two versions for the radius
of gyration... | [
{
"created": "Sun, 21 Dec 2008 00:43:53 GMT",
"version": "v1"
}
] | 2011-08-31 | [
[
"Silva",
"Paulo Roberto",
""
]
] | It is traced out a parallel between the cosmological constant problem and the polymer physics. The time evolution of the universe world line is compared with the growing of a polymer chain. An equivalent Flory free energy and a modification of it are used as a means to evaluate two versions for the radius of gyration o... |
gr-qc/0410074 | A. Joel Saavedra | Samuel Lepe and Joel Saavedra | Quasinormal modes, Superradiance and Area Spectrum for 2+1 Acoustic
Black Holes | 10 pages, Final version, an appendix and some references was added,
accepted by Phys. Lett. B | Phys.Lett. B617 (2005) 174-181 | 10.1016/j.physletb.2005.05.021 | GACG-04/13 | gr-qc hep-th | null | We present an exact expression for the quasinormal modes of acoustic
disturbances in a rotating 2+1 dimensional sonic black hole (draining bathtub
fluid flow) in the low frequency limit and evaluate the adiabatic invariant
proposed by Kunstatter. We also compute,via Bohr-Sommerfeld quantization rule
the equivalent ar... | [
{
"created": "Sat, 16 Oct 2004 16:27:54 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2005 23:39:07 GMT",
"version": "v2"
},
{
"created": "Tue, 10 May 2005 17:27:51 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Lepe",
"Samuel",
""
],
[
"Saavedra",
"Joel",
""
]
] | We present an exact expression for the quasinormal modes of acoustic disturbances in a rotating 2+1 dimensional sonic black hole (draining bathtub fluid flow) in the low frequency limit and evaluate the adiabatic invariant proposed by Kunstatter. We also compute,via Bohr-Sommerfeld quantization rule the equivalent area... |
1011.3755 | Ahmed Youssef | Ahmed Youssef | Infrared behavior and gauge artifacts in de Sitter spacetime: The photon
field | 4 pages, published version | Phys.Rev.Lett.107:021101,2011 | 10.1103/PhysRevLett.107.021101 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the infrared (long distance) behavior of the free photon field in de
Sitter spacetime. Using a two-parameter family of gauge fixing terms, we show
that the infrared (IR) behavior of the two-point function is highly
gauge-dependent and ranges from vanishing to growing. This situation is in
disagreement with i... | [
{
"created": "Tue, 16 Nov 2010 16:57:13 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2011 21:36:52 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jul 2011 06:18:18 GMT",
"version": "v3"
}
] | 2011-07-29 | [
[
"Youssef",
"Ahmed",
""
]
] | We study the infrared (long distance) behavior of the free photon field in de Sitter spacetime. Using a two-parameter family of gauge fixing terms, we show that the infrared (IR) behavior of the two-point function is highly gauge-dependent and ranges from vanishing to growing. This situation is in disagreement with its... |
0906.1774 | Jorge Pullin | Rodolfo Gambini, Jorge Pullin, Saeed Rastgoo | Quantum scalar field in quantum gravity: the vacuum in the spherically
symmetric case | 15 pages, one figure | Class.Quant.Grav.26:215011,2009 | 10.1088/0264-9381/26/21/215011 | LSU-REL-060909 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravity coupled to a scalar field in spherical symmetry using loop
quantum gravity techniques. Since this model has local degrees of freedom, one
has to face ``the problem of dynamics'', that is, diffeomorphism and
Hamiltonian constraints that do not form a Lie algebra. We tackle the problem
using the ``unif... | [
{
"created": "Tue, 9 Jun 2009 16:19:39 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | We study gravity coupled to a scalar field in spherical symmetry using loop quantum gravity techniques. Since this model has local degrees of freedom, one has to face ``the problem of dynamics'', that is, diffeomorphism and Hamiltonian constraints that do not form a Lie algebra. We tackle the problem using the ``unifor... |
1812.11851 | Bei Lok Hu | Bei-Lok Hu | Infrared Behavior of Quantum Fields in Inflationary Cosmology -- Issues
and Approaches: an overview | 56 pages, a chapter in the forthcoming book "Semiclassical and
Stochastic Gravity -- Quantum Field Effects on Curved Spacetime" by Bei-Lok
B. Hu and Enric Verdaguer, Cambridge University Press 2019. arXiv admin note:
text overlap with arXiv:1807.05964, arXiv:1506.06183, arXiv:1412.4893,
arXiv:1808.00338, arXiv:... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a pedagogical guide to works on this subject which began in the 80s
but has seen vibrant activities in the last decade. It aims to help orient
readers, especially students, who wish to enter into research but bewildered by
the vast and diverse literature on this subject. We describe the three main
veins of ac... | [
{
"created": "Fri, 28 Dec 2018 08:25:54 GMT",
"version": "v1"
}
] | 2019-01-01 | [
[
"Hu",
"Bei-Lok",
""
]
] | This is a pedagogical guide to works on this subject which began in the 80s but has seen vibrant activities in the last decade. It aims to help orient readers, especially students, who wish to enter into research but bewildered by the vast and diverse literature on this subject. We describe the three main veins of acti... |
1809.08237 | Antonios Tsokaros A. | Antonios Tsokaros, Koji Uryu, Milton Ruiz, Stuart L. Shapiro | Constant circulation sequences of binary neutron stars and their spin
characterization | 9 pages, 7 figures, matches published version | Phys. Rev. D 98, 124019 (2018) | 10.1103/PhysRevD.98.124019 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For isentropic fluids, dynamical evolution of a binary system conserves the
baryonic mass and circulation; therefore, sequences of constant rest mass and
constant circulation are of particular importance. In this work, we present the
extension of our Compact Object CALculator (\cocal{}) code to compute such
quasiequi... | [
{
"created": "Fri, 21 Sep 2018 18:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Dec 2018 06:35:51 GMT",
"version": "v2"
}
] | 2019-01-01 | [
[
"Tsokaros",
"Antonios",
""
],
[
"Uryu",
"Koji",
""
],
[
"Ruiz",
"Milton",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | For isentropic fluids, dynamical evolution of a binary system conserves the baryonic mass and circulation; therefore, sequences of constant rest mass and constant circulation are of particular importance. In this work, we present the extension of our Compact Object CALculator (\cocal{}) code to compute such quasiequili... |
0810.2185 | Carles Bona | C. Bona, C. Bona-Casas and J. Terradas | Linear high-resolution schemes for hyperbolic conservation laws: TVB
numerical evidence | Revised version, including new tests to appear in Journal of
Computational Physics | J.Comput.Phys.228:2266-2281,2009 | 10.1016/j.jcp.2008.12.010 | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Osher-Chakrabarthy family of linear flux-modification schemes is
considered. Improved lower bounds on the compression factors are provided,
which suggest the viability of using the unlimited version. The LLF flux
formula is combined with these schemes in order to obtain efficient
finite-difference algorithms. The... | [
{
"created": "Mon, 13 Oct 2008 09:28:50 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Dec 2008 08:51:12 GMT",
"version": "v2"
}
] | 2009-02-12 | [
[
"Bona",
"C.",
""
],
[
"Bona-Casas",
"C.",
""
],
[
"Terradas",
"J.",
""
]
] | The Osher-Chakrabarthy family of linear flux-modification schemes is considered. Improved lower bounds on the compression factors are provided, which suggest the viability of using the unlimited version. The LLF flux formula is combined with these schemes in order to obtain efficient finite-difference algorithms. The r... |
1412.7352 | Aurelien Barrau | Aurelien Barrau | Testing the Everett Interpretation of Quantum Mechanics with Cosmology | 5 pages | Elec. J. Theorical Phys. 12, 33 (2015) 127 | null | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief note, we argue that contrarily to what is still often stated,
the Everett many-worlds interpretation of quantum mechanics is not in principle
impossible to test. It is actually not more difficult (but not easier either)
to test than most other kinds of multiverse theories. We also remind why
multiverse ... | [
{
"created": "Tue, 23 Dec 2014 12:57:39 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2015 08:31:13 GMT",
"version": "v2"
}
] | 2015-10-01 | [
[
"Barrau",
"Aurelien",
""
]
] | In this brief note, we argue that contrarily to what is still often stated, the Everett many-worlds interpretation of quantum mechanics is not in principle impossible to test. It is actually not more difficult (but not easier either) to test than most other kinds of multiverse theories. We also remind why multiverse sc... |
gr-qc/9812001 | Fabio Dahia | F. Dahia and C. Romero | Line Sources in Brans-Dicke Theory of Gravity | 21 pages, RevTex; added a discussion on the Gundlach and Ortiz
solution | Phys.Rev. D60 (1999) 104019 | 10.1103/PhysRevD.60.104019 | null | gr-qc | null | We investigate how the gravitational field generated by line sources can be
characterized in Brans-Dicke theory of gravity. Adapting an approach previously
developed by Israel who solved the same problem in general relativity we show
that in Brans-Dicke theory's case it is possible to work out the field
equations whi... | [
{
"created": "Tue, 1 Dec 1998 02:21:35 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 1999 18:03:34 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Dahia",
"F.",
""
],
[
"Romero",
"C.",
""
]
] | We investigate how the gravitational field generated by line sources can be characterized in Brans-Dicke theory of gravity. Adapting an approach previously developed by Israel who solved the same problem in general relativity we show that in Brans-Dicke theory's case it is possible to work out the field equations which... |
1907.03298 | Yurii Ignat'ev | Yu. G. Ignat'ev and I. A. Kokh | Qualitative and Numerical Analysis of a Cosmological Model Based on an
Asymmetric Scalar Doublet with Minimal connections. IV. Numerical Modeling
and Types of Behavior of the Model | 16 pages, 25 figures, 11 references | Russian Physics Journal, 62, No. 3, (2019) | 10.1007/s11182-019-01733-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the basis of a qualitative and numerical analysis of a cosmological model
based on an asymmetric scalar doublet of nonlinear, minimally interacting
scalar fields -- one classical and one phantom, peculiarities of the behavior
of the model near zero energy hypersurfaces have been revealed. Numerical
models have bee... | [
{
"created": "Sun, 7 Jul 2019 14:17:08 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Kokh",
"I. A.",
""
]
] | On the basis of a qualitative and numerical analysis of a cosmological model based on an asymmetric scalar doublet of nonlinear, minimally interacting scalar fields -- one classical and one phantom, peculiarities of the behavior of the model near zero energy hypersurfaces have been revealed. Numerical models have been ... |
2011.05137 | Neeraj Kumar | Neeraj Kumar, Sunandan Gangopadhyay | Phase transitions in D-dimensional Gauss-Bonnet-Born-Infeld AdS black
holes | 13 Pages, multiple figures | General Relativity and Gravitation (2021) 53:35 | 10.1007/s10714-021-02808-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have investigated the phase transition in black holes when
Gauss-Bonnet corrections to the spacetime curvature and Born-Infeld extension
in stress-energy tensor of electromagnetic field are considered in a negative
cosmological constant background. It is evident that the black hole undergoes a
phase... | [
{
"created": "Mon, 9 Nov 2020 06:26:20 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Mar 2021 05:23:27 GMT",
"version": "v2"
}
] | 2021-03-31 | [
[
"Kumar",
"Neeraj",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this paper, we have investigated the phase transition in black holes when Gauss-Bonnet corrections to the spacetime curvature and Born-Infeld extension in stress-energy tensor of electromagnetic field are considered in a negative cosmological constant background. It is evident that the black hole undergoes a phase t... |
gr-qc/0701026 | Marie-Anne Bizouard | F. Beauville, M.-A. Bizouard, L. Blackburn, L. Bosi, L. Brocco, D.
Brown, D. Buskulic, F. Cavalier, S. Chatterji, N. Christensen, A.-C. Clapson,
S. Fairhurst, D. Grosjean, G. Guidi, P. Hello, S. Heng, M. Hewitson, E.
Katsavounidis, S. Klimenko, M. Knight, A. Lazzarini, N. Leroy, F. Marion, J.
Markowitz, C. Mela... | A comparison of methods for gravitational wave burst searches from LIGO
and Virgo | LIGO-Virgo working group submitted to PRD | Class.Quant.Grav.25:045002,2008 | 10.1088/0264-9381/25/4/045002 | null | gr-qc | null | The search procedure for burst gravitational waves has been studied using 24
hours of simulated data in a network of three interferometers (Hanford 4-km,
Livingston 4-km and Virgo 3-km are the example interferometers). Several
methods to detect burst events developed in the LIGO Scientific Collaboration
(LSC) and Vir... | [
{
"created": "Wed, 3 Jan 2007 16:35:38 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Beauville",
"F.",
""
],
[
"Bizouard",
"M. -A.",
""
],
[
"Blackburn",
"L.",
""
],
[
"Bosi",
"L.",
""
],
[
"Brocco",
"L.",
""
],
[
"Brown",
"D.",
""
],
[
"Buskulic",
"D.",
""
],
[
"Cavalier",
"F.... | The search procedure for burst gravitational waves has been studied using 24 hours of simulated data in a network of three interferometers (Hanford 4-km, Livingston 4-km and Virgo 3-km are the example interferometers). Several methods to detect burst events developed in the LIGO Scientific Collaboration (LSC) and Virgo... |
2202.00236 | Pardyumn Kumar Sahoo | Oleksii Sokoliuk, Alexander Baransky, P.K. Sahoo | Kuchowicz gravastars in the braneworld formalism | 9 pages, 6 figures: Revised version | Physics Letters B, 829 (2022) 137048 | 10.1016/j.physletb.2022.137048 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the current letter, we study isotropic static spherically symmetric
gravastars without charge under the framework of braneworld gravity
(dimensionally reduced RS-II braneworld with positive brane tension) using the
metric potential of Kuchowicz type (which is physically acceptable,
non-singular and stable) in the ... | [
{
"created": "Tue, 1 Feb 2022 06:22:42 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Feb 2022 17:06:07 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Mar 2022 16:09:21 GMT",
"version": "v3"
}
] | 2022-04-07 | [
[
"Sokoliuk",
"Oleksii",
""
],
[
"Baransky",
"Alexander",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In the current letter, we study isotropic static spherically symmetric gravastars without charge under the framework of braneworld gravity (dimensionally reduced RS-II braneworld with positive brane tension) using the metric potential of Kuchowicz type (which is physically acceptable, non-singular and stable) in the Ma... |
1711.10333 | J\"urgen Struckmeier | J. Struckmeier, J. Muench, P. Liebrich, M. Hanauske, J. Kirsch, D.
Vasak, L. Satarov, H. Stoecker | Canonical transformation path to gauge theories of gravity II ---
Spacetime coupling of spin-0 and spin-1 particle fields | 26 pages | Int. J. Mod. Phys. E, 28 (2019) 1950007 | 10.1142/S0218301319500071 | null | gr-qc hep-th nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generic form of spacetime dynamics as a classical gauge field theory has
recently been derived, based on only the action principle and on the Principle
of General Relativity. It was thus shown that Einstein's General Relativity is
the special case where (i) the Hilbert Lagrangian (essentially the Ricci
scalar) is... | [
{
"created": "Tue, 28 Nov 2017 15:14:26 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Feb 2018 14:24:36 GMT",
"version": "v2"
},
{
"created": "Tue, 15 May 2018 15:50:00 GMT",
"version": "v3"
},
{
"created": "Thu, 28 Jun 2018 13:56:53 GMT",
"version": "v4"
},
{
"c... | 2019-05-28 | [
[
"Struckmeier",
"J.",
""
],
[
"Muench",
"J.",
""
],
[
"Liebrich",
"P.",
""
],
[
"Hanauske",
"M.",
""
],
[
"Kirsch",
"J.",
""
],
[
"Vasak",
"D.",
""
],
[
"Satarov",
"L.",
""
],
[
"Stoecker",
"H.",... | The generic form of spacetime dynamics as a classical gauge field theory has recently been derived, based on only the action principle and on the Principle of General Relativity. It was thus shown that Einstein's General Relativity is the special case where (i) the Hilbert Lagrangian (essentially the Ricci scalar) is s... |
1612.05608 | Vijay Varma | Vijay Varma, Parameswaran Ajith | Effects of nonquadrupole modes in the detection and parameter estimation
of black hole binaries with nonprecessing spins | 10 pages; Version accepted in PRD | Phys. Rev. D 96, 124024 (2017) | 10.1103/PhysRevD.96.124024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of nonquadrupolar modes in the detection and parameter
estimation of gravitational waves (GWs) from black hole binaries with
nonprecessing spins, using Advanced LIGO. We evaluate the loss of the
signal-to-noise ratio (SNR) and the systematic errors in the estimated
parameters when a quadrupole-mod... | [
{
"created": "Fri, 16 Dec 2016 19:49:18 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 2017 01:32:06 GMT",
"version": "v2"
}
] | 2017-12-27 | [
[
"Varma",
"Vijay",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | We study the effect of nonquadrupolar modes in the detection and parameter estimation of gravitational waves (GWs) from black hole binaries with nonprecessing spins, using Advanced LIGO. We evaluate the loss of the signal-to-noise ratio (SNR) and the systematic errors in the estimated parameters when a quadrupole-mode ... |
0711.0960 | Lior M. Burko | Lior M. Burko and Gaurav Khanna | Late-time Kerr tails revisited | 16 pages, 26 figures, 2 tables; Many changes compared with previous
version | Class.Quant.Grav.26:015014,2009 | 10.1088/0264-9381/26/1/015014 | null | gr-qc | null | The decay rate of late time tails in the Kerr spacetime have been the cause
of numerous conflicting results, both analytical and numerical. In particular,
there is much disagreement on whether the decay rate of an initially pure
multipole moment ${\ell}$ is according to $t^{-(2{\bar\ell}+3)}$, where
${\bar\ell}$ is t... | [
{
"created": "Tue, 6 Nov 2007 20:10:24 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Mar 2008 15:37:50 GMT",
"version": "v2"
}
] | 2008-12-25 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
]
] | The decay rate of late time tails in the Kerr spacetime have been the cause of numerous conflicting results, both analytical and numerical. In particular, there is much disagreement on whether the decay rate of an initially pure multipole moment ${\ell}$ is according to $t^{-(2{\bar\ell}+3)}$, where ${\bar\ell}$ is the... |
2205.07304 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Chirality of Gravitational Waves in Chern-Simons $f(R)$ Gravity
Cosmology | PRD Accepted | null | 10.1103/PhysRevD.105.104054 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we shall consider an axionic Chern-Simons corrected $f(R)$
gravity theoretical framework, and we shall study the chirality of the
generated primordial gravitational waves. Particularly, we shall consider two
main axion models, the canonical misalignment axion model and the kinetic axion
model, both of w... | [
{
"created": "Sun, 15 May 2022 14:56:17 GMT",
"version": "v1"
}
] | 2022-06-08 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this paper we shall consider an axionic Chern-Simons corrected $f(R)$ gravity theoretical framework, and we shall study the chirality of the generated primordial gravitational waves. Particularly, we shall consider two main axion models, the canonical misalignment axion model and the kinetic axion model, both of whi... |
1310.2675 | Andrew K. Waldron | S. Deser and A. Waldron | Non-Einstein source effects in massive gravity | 2 pages, LaTeX, further improved title, version to appear in PRD | Phys. Rev. D 89, 027503 (2014) | 10.1103/PhysRevD.89.027503 | BR-TH 670, CALT 68-2865 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We exhibit novel effects (absent in GR) of sources in massive gravity. First,
we show that removing its ghost mode forces a field-current identity: The
metric's trace is locally proportional to that of its stress tensor; a point
source implies a metric singularity enhanced by the square of the graviton's
range. Secon... | [
{
"created": "Thu, 10 Oct 2013 01:12:37 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2013 23:37:18 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Dec 2013 05:47:02 GMT",
"version": "v3"
}
] | 2014-01-22 | [
[
"Deser",
"S.",
""
],
[
"Waldron",
"A.",
""
]
] | We exhibit novel effects (absent in GR) of sources in massive gravity. First, we show that removing its ghost mode forces a field-current identity: The metric's trace is locally proportional to that of its stress tensor; a point source implies a metric singularity enhanced by the square of the graviton's range. Second,... |
0711.0291 | Andreas Freise | A. Freise, A. Bunkowski and R. Schnabel | Phase and alignment noise in grating interferometers | 16 pages, 6 figures | New J.Phys.9:433,2007 | 10.1088/1367-2630/9/12/433 | null | gr-qc | null | Diffraction gratings have been proposed as core optical elements in future
laser-interferometric gravitational-wave detectors. In this paper we derive
equations for the coupling between alignment noise and phase noise at
diffraction gratings. In comparison to a standard reflective component (mirror
or beam splitter) ... | [
{
"created": "Fri, 2 Nov 2007 11:38:35 GMT",
"version": "v1"
}
] | 2009-12-10 | [
[
"Freise",
"A.",
""
],
[
"Bunkowski",
"A.",
""
],
[
"Schnabel",
"R.",
""
]
] | Diffraction gratings have been proposed as core optical elements in future laser-interferometric gravitational-wave detectors. In this paper we derive equations for the coupling between alignment noise and phase noise at diffraction gratings. In comparison to a standard reflective component (mirror or beam splitter) th... |
1003.1863 | Tae Hoon Lee | Tae Hoon Lee | Global monopole solutions in Horava gravity | 7 pages, added references | null | 10.1088/0264-9381/27/24/247001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Horava's theory of gravity coupled to a global monopole source, we seek
for static, spherically symmetric spacetime solutions for general values of
$\lambda$. We obtain the explicit solutions with deficit solid angles, in the
IR modified Horava gravity model, at the IR fixed point $\lambda=1$ and at the
conformal ... | [
{
"created": "Tue, 9 Mar 2010 13:00:29 GMT",
"version": "v1"
},
{
"created": "Wed, 19 May 2010 03:29:09 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Lee",
"Tae Hoon",
""
]
] | In Horava's theory of gravity coupled to a global monopole source, we seek for static, spherically symmetric spacetime solutions for general values of $\lambda$. We obtain the explicit solutions with deficit solid angles, in the IR modified Horava gravity model, at the IR fixed point $\lambda=1$ and at the conformal po... |
2010.03418 | S Mahesh Chandran | S. Mahesh Chandran, S. Shankaranarayanan (IIT Bombay) | One-to-one correspondence between entanglement mechanics and black hole
thermodynamics | 24 pages, 10 figures, 2 tables | Phys. Rev. D 102, 125025 (2020) | 10.1103/PhysRevD.102.125025 | null | gr-qc cond-mat.stat-mech hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish a one-to-one mapping between entanglement entropy, energy, and
temperature (quantum entanglement mechanics) with black hole entropy, Komar
energy, and Hawking temperature, respectively. We show this explicitly for 4-D
spherically symmetric asymptotically flat and non-flat space-times with single
and mult... | [
{
"created": "Wed, 7 Oct 2020 13:57:57 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Chandran",
"S. Mahesh",
"",
"IIT Bombay"
],
[
"Shankaranarayanan",
"S.",
"",
"IIT Bombay"
]
] | We establish a one-to-one mapping between entanglement entropy, energy, and temperature (quantum entanglement mechanics) with black hole entropy, Komar energy, and Hawking temperature, respectively. We show this explicitly for 4-D spherically symmetric asymptotically flat and non-flat space-times with single and multip... |
1010.4013 | Miguel Alcubierre | Miguel Alcubierre and Martha D. Mendez | Formulations of the 3+1 evolution equations in curvilinear coordinates | 19 pages, 12 figures | Gen.Rel.Grav.43:2769-2806,2011 | 10.1007/s10714-011-1202-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following Brown, in this paper we give an overview of how to modify standard
hyperbolic formulations of the 3+1 evolution equations of General Relativity in
such a way that all auxiliary quantities are true tensors, thus allowing for
these formulations to be used with curvilinear sets of coordinates such as
spherical... | [
{
"created": "Tue, 19 Oct 2010 19:16:31 GMT",
"version": "v1"
}
] | 2011-09-28 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Mendez",
"Martha D.",
""
]
] | Following Brown, in this paper we give an overview of how to modify standard hyperbolic formulations of the 3+1 evolution equations of General Relativity in such a way that all auxiliary quantities are true tensors, thus allowing for these formulations to be used with curvilinear sets of coordinates such as spherical o... |
2108.01190 | Sourabh Nampalliwar | Sourabh Nampalliwar and Saurabh K | Theory-agnostic tests of gravity with black hole shadows | 6 pages, 3 figures. Comments are welcome! | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations of black hole shadows with the Event Horizon Telescope have
paved way for a novel approach to testing Einstein's theory of general
relativity. Early analyses of the measured shadow put constraints on
theory-agnostic parameters typically used to study deviations from Einstein's
theory, but the robustness ... | [
{
"created": "Mon, 2 Aug 2021 22:04:29 GMT",
"version": "v1"
}
] | 2021-08-04 | [
[
"Nampalliwar",
"Sourabh",
""
],
[
"K",
"Saurabh",
""
]
] | Observations of black hole shadows with the Event Horizon Telescope have paved way for a novel approach to testing Einstein's theory of general relativity. Early analyses of the measured shadow put constraints on theory-agnostic parameters typically used to study deviations from Einstein's theory, but the robustness of... |
2312.16479 | Prosenjit Paul | Prosenjit Paul | Quasinormal modes of Einstein--scalar--Gauss--Bonnet black holes | 32 pages, reduced number of figures, Published in Eur. Phys. J. C | Eur. Phys. J. C 84, 218 (2024) | 10.1140/epjc/s10052-024-12563-6 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate quasinormal modes of scalar and electromagnetic
fields in the background of Einstein--scalar--Gauss--Bonnet (EsGB) black holes.
Using the scalar and electromagnetic field equations in the vicinity of the
EsGB black hole, we study nature of the effective potentials. The dependence of
real... | [
{
"created": "Wed, 27 Dec 2023 09:05:46 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jan 2024 06:37:19 GMT",
"version": "v2"
},
{
"created": "Sat, 2 Mar 2024 07:30:20 GMT",
"version": "v3"
}
] | 2024-03-05 | [
[
"Paul",
"Prosenjit",
""
]
] | In this paper, we investigate quasinormal modes of scalar and electromagnetic fields in the background of Einstein--scalar--Gauss--Bonnet (EsGB) black holes. Using the scalar and electromagnetic field equations in the vicinity of the EsGB black hole, we study nature of the effective potentials. The dependence of real a... |
2406.00419 | Giampiero Esposito Dr. | Giampiero Esposito, Giuseppe Filiberto Vitale | Homogeneous projective coordinates for the Bondi-Metzner-Sachs group | 26 pages, Latex, 9 figures. Misprints corrected and presentation
improved | Symmetry, Vol. 16, Issue 7, article 867, year 2024 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper studies the Bondi-Metzner-Sachs group in homogeneous projective
coordinates, because it is then possible to write all transformations of such a
group in a manifestly linear way. The 2-sphere metric, Bondi-Metzner-Sachs
metric, asymptotic Killing vectors, generators of supertranslations, as well as
boosts a... | [
{
"created": "Sat, 1 Jun 2024 12:33:36 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jul 2024 08:28:01 GMT",
"version": "v2"
}
] | 2024-07-23 | [
[
"Esposito",
"Giampiero",
""
],
[
"Vitale",
"Giuseppe Filiberto",
""
]
] | This paper studies the Bondi-Metzner-Sachs group in homogeneous projective coordinates, because it is then possible to write all transformations of such a group in a manifestly linear way. The 2-sphere metric, Bondi-Metzner-Sachs metric, asymptotic Killing vectors, generators of supertranslations, as well as boosts and... |
1706.09710 | Oleg Lemets | Yu.L. Bolotin, M.I. Konchatnyi, O.A. Lemets, L.G. Zazunov | Cosmography of Cardassian model | 3 figures. corrected some errors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The parameters of any model that satisfies the cosmological principle (the
universe is homogeneous and isotropic on large scale), can be expressed through
cosmographic parameters. In this paper, we perform this procedure for the
Cardassian model. We demonstrate a number of advantages of the approach used
before tradi... | [
{
"created": "Wed, 28 Jun 2017 16:10:13 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jul 2017 08:32:06 GMT",
"version": "v2"
}
] | 2017-07-27 | [
[
"Bolotin",
"Yu. L.",
""
],
[
"Konchatnyi",
"M. I.",
""
],
[
"Lemets",
"O. A.",
""
],
[
"Zazunov",
"L. G.",
""
]
] | The parameters of any model that satisfies the cosmological principle (the universe is homogeneous and isotropic on large scale), can be expressed through cosmographic parameters. In this paper, we perform this procedure for the Cardassian model. We demonstrate a number of advantages of the approach used before traditi... |
gr-qc/0402083 | Elizabeth Wickham | Alberto Vecchio and Elizabeth D. L. Wickham | LISA Response Function and Parameter Estimation | 4 pages, 2 figures, amaldi 5 conference proceedings | Class.Quant.Grav. 21 (2004) S661-S664 | 10.1088/0264-9381/21/5/040 | null | gr-qc | null | We investigate the response function of LISA and consider the adequacy of its
commonly used approximation in the high-frequency range of the observational
band. We concentrate on monochromatic binary systems, such as white dwarf
binaries. We find that above a few mHz the approxmation starts becoming
increasingly inac... | [
{
"created": "Thu, 19 Feb 2004 12:24:47 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Vecchio",
"Alberto",
""
],
[
"Wickham",
"Elizabeth D. L.",
""
]
] | We investigate the response function of LISA and consider the adequacy of its commonly used approximation in the high-frequency range of the observational band. We concentrate on monochromatic binary systems, such as white dwarf binaries. We find that above a few mHz the approxmation starts becoming increasingly inaccu... |
2107.06693 | Alejandro Asc\'arate | Alejandro Asc\'arate | The Spacetime Picture in Quantum Gravity II | 23 pages, comments for improvement very welcome | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | As a continuation to [12], we introduce a new formalism for (part of) QG,
which we call TQG, since it's based on the NC Tori. This allows us to obtain
numerous insights about the nature of time, like its discretization, its
regular pace at the macroscopic scale, a solution to the Problem of Time, and a
connection wit... | [
{
"created": "Wed, 14 Jul 2021 13:33:45 GMT",
"version": "v1"
}
] | 2021-07-15 | [
[
"Ascárate",
"Alejandro",
""
]
] | As a continuation to [12], we introduce a new formalism for (part of) QG, which we call TQG, since it's based on the NC Tori. This allows us to obtain numerous insights about the nature of time, like its discretization, its regular pace at the macroscopic scale, a solution to the Problem of Time, and a connection with ... |
gr-qc/0608049 | Richard Woodard | E. O. Kahya and R. P. Woodard (University of Florida) | One Loop Corrected Mode Functions for SQED during Inflation | 26 pages, uses LaTeX 2 epsilon, no figures, version 2 has an updated
reference list | Phys.Rev.D74:084012,2006 | 10.1103/PhysRevD.74.084012 | UFIFT-QG-06-04 | gr-qc astro-ph hep-ph | null | We solve the one loop effective scalar field equations for spatial plane
waves in massless, minimally coupled scalar quantum electrodynamics on a
locally de Sitter background. The computation is done in two different gauges:
a non-de Sitter invariant analogue of Feynman gauge, and in the de Sitter
invariant, Lorentz ... | [
{
"created": "Wed, 9 Aug 2006 14:50:21 GMT",
"version": "v1"
},
{
"created": "Sun, 11 May 2008 14:46:30 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kahya",
"E. O.",
"",
"University of Florida"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | We solve the one loop effective scalar field equations for spatial plane waves in massless, minimally coupled scalar quantum electrodynamics on a locally de Sitter background. The computation is done in two different gauges: a non-de Sitter invariant analogue of Feynman gauge, and in the de Sitter invariant, Lorentz ga... |
2107.03859 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel and Ayan Banerjee | Constraint on Einstein-Gauss-Bonnet Gravity from Neutron Stars | 10 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of Einstein-Gauss-Bonnet theory in five-dimensional
spacetime ($5D$ EGB), we derive the hydrostatic equilibrium equations and solve
them numerically to obtain the neutron stars for both isotropic and anisotropic
distribution of matter. The mass-radius relations are obtained for SLy equation
of st... | [
{
"created": "Thu, 8 Jul 2021 14:17:02 GMT",
"version": "v1"
},
{
"created": "Sat, 14 May 2022 16:00:33 GMT",
"version": "v2"
}
] | 2022-05-17 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Banerjee",
"Ayan",
""
]
] | Within the framework of Einstein-Gauss-Bonnet theory in five-dimensional spacetime ($5D$ EGB), we derive the hydrostatic equilibrium equations and solve them numerically to obtain the neutron stars for both isotropic and anisotropic distribution of matter. The mass-radius relations are obtained for SLy equation of stat... |
0810.3744 | Todd Oliynyk | Todd A. Oliynyk | The Newtonian limit for perfect fluids | Differs slightly from the published version | Comm.Math.Phys.276:131-188,2007 | 10.1007/s00220-007-0334-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that there exists a class of non-stationary solutions to the
Einstein-Euler equations which have a Newtonian limit. The proof of this result
is based on a symmetric hyperbolic formulation of the Einstein-Euler equations
which contains a singular parameter $\ep = v_T/c$ where $v_T$ is a
characteristic velocit... | [
{
"created": "Tue, 21 Oct 2008 04:08:41 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Nov 2009 00:11:11 GMT",
"version": "v2"
}
] | 2009-11-05 | [
[
"Oliynyk",
"Todd A.",
""
]
] | We prove that there exists a class of non-stationary solutions to the Einstein-Euler equations which have a Newtonian limit. The proof of this result is based on a symmetric hyperbolic formulation of the Einstein-Euler equations which contains a singular parameter $\ep = v_T/c$ where $v_T$ is a characteristic velocity ... |
1102.2862 | Edward Anderson | Edward Anderson | Relational Quadrilateralland Interpretation of CP^2 and Quotients | Seminar II on relational quadrilaterals (2-d 4-body problem as a
whole-universe model free from absolute structures). References updated.
arXiv admin note: substantial text overlap with arXiv:1202.4186 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I investigate qualitatively significant regions of the configuration space
for the classical and quantum mechanics of the relational quadrilateral in 2-d.
This is relational in the sense that only relative ratios of separations,
relative angles and relative times are significant. Such relational particle
mechanics mo... | [
{
"created": "Mon, 14 Feb 2011 19:20:46 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Aug 2013 00:48:39 GMT",
"version": "v2"
}
] | 2013-08-08 | [
[
"Anderson",
"Edward",
""
]
] | I investigate qualitatively significant regions of the configuration space for the classical and quantum mechanics of the relational quadrilateral in 2-d. This is relational in the sense that only relative ratios of separations, relative angles and relative times are significant. Such relational particle mechanics mode... |
2005.03869 | Brett McInnes | Brett McInnes | Fragmentation of AdS$_5$-Kerr Black Holes | 23 pages, 8 Figures | Nuclear Physics B, Volume 982 (2022) 115897 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole spacetimes asymptotic to five-dimensional anti-de Sitter spacetime
are of great interest in connection with the string-gauge duality. In the
rotating case, such black holes tend to become unstable, in several different
ways, if their specific angular momenta fall in certain ranges. Here we
consider the wel... | [
{
"created": "Fri, 8 May 2020 06:10:17 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Jul 2020 05:56:02 GMT",
"version": "v2"
}
] | 2022-08-15 | [
[
"McInnes",
"Brett",
""
]
] | Black hole spacetimes asymptotic to five-dimensional anti-de Sitter spacetime are of great interest in connection with the string-gauge duality. In the rotating case, such black holes tend to become unstable, in several different ways, if their specific angular momenta fall in certain ranges. Here we consider the well-... |
2111.14828 | Amir Hadi Ziaie | Mohammad Reza Mehdizadeh and Amir Hadi Ziaie | Dynamical wormholes in Lovelock gravity | 23 pages & 8 figures | Phys. Rev. D 104, 104050 (2021) | 10.1103/PhysRevD.104.104050 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this study we present evolving wormhole configurations in third-order
{Lovelock} gravity and investigate the possibility that these solutions satisfy
the energy conditions. Using a generalized Friedmann-Robertson-Walker
spacetime, we derive evolving wormhole geometries by considering a constraint
on the Ricci scal... | [
{
"created": "Fri, 26 Nov 2021 20:15:21 GMT",
"version": "v1"
}
] | 2021-12-01 | [
[
"Mehdizadeh",
"Mohammad Reza",
""
],
[
"Ziaie",
"Amir Hadi",
""
]
] | In this study we present evolving wormhole configurations in third-order {Lovelock} gravity and investigate the possibility that these solutions satisfy the energy conditions. Using a generalized Friedmann-Robertson-Walker spacetime, we derive evolving wormhole geometries by considering a constraint on the Ricci scalar... |
1905.03827 | Yu Asato | Yu Asato | Black holes and singularities in causal set gravity | 12 pages with 6 figures | null | 10.1088/1361-6382/ab3c18 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A precise definition of a black hole has long been absent in causal set
theory. I first show that the local finiteness of the theory cannot be
interpreted as a complete discretization condition, and the theory still admits
continua, which I call singular anti-chains. After providing a couple of
suggestive calculation... | [
{
"created": "Thu, 9 May 2019 19:33:52 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Asato",
"Yu",
""
]
] | A precise definition of a black hole has long been absent in causal set theory. I first show that the local finiteness of the theory cannot be interpreted as a complete discretization condition, and the theory still admits continua, which I call singular anti-chains. After providing a couple of suggestive calculations ... |
1008.4309 | Michael T. Anderson | Michael T. Anderson | On quasi-local Hamiltonians in General Relativity | 9 pages | Phys.Rev.D82:084044,2010 | 10.1103/PhysRevD.82.084044 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the definition of quasi-local energy in GR based on a Hamiltonian
analysis of the Einstein-Hilbert action initiated by Brown-York. The role of
the constraint equations, in particular the Hamiltonian constraint on the
timelike boundary, neglected in previous studies, is emphasized here. We argue
that a cons... | [
{
"created": "Wed, 25 Aug 2010 16:18:38 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Anderson",
"Michael T.",
""
]
] | We analyse the definition of quasi-local energy in GR based on a Hamiltonian analysis of the Einstein-Hilbert action initiated by Brown-York. The role of the constraint equations, in particular the Hamiltonian constraint on the timelike boundary, neglected in previous studies, is emphasized here. We argue that a consis... |
0911.0667 | Simone Calogero | Simone Calogero, J. Mark Heinzle | Bianchi Cosmologies with Anisotropic Matter: Locally Rotationally
Symmetric Models | 64 pages, 19 Figures | Physica D240:636-669,2011 | 10.1016/j.physd.2010.11.015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of cosmological models with isotropic matter sources (perfect
fluids) is extensively studied in the literature; in comparison, the dynamics
of cosmological models with anisotropic matter sources is not. In this paper we
consider spatially homogeneous locally rotationally symmetric solutions of the
Einste... | [
{
"created": "Tue, 3 Nov 2009 20:29:19 GMT",
"version": "v1"
}
] | 2011-02-16 | [
[
"Calogero",
"Simone",
""
],
[
"Heinzle",
"J. Mark",
""
]
] | The dynamics of cosmological models with isotropic matter sources (perfect fluids) is extensively studied in the literature; in comparison, the dynamics of cosmological models with anisotropic matter sources is not. In this paper we consider spatially homogeneous locally rotationally symmetric solutions of the Einstein... |
1806.03846 | Dawood Kothawala Dr. | Dawood Kothawala | BGV theorem, Geodesic deviation, and Quantum fluctuations | 9 pages, 3 figures, mathematical details added in appendix, matches
final published version | Class. Quantum Grav. 38, 024046 (2021) | 10.1088/1361-6382/abd146 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I point out a simple expression for the "Hubble" parameter $\mathscr{H}$,
defined by Borde, Guth and Vilenkin (BGV) in their proof of past incompleteness
of inflationary spacetimes. I show that the parameter $\mathscr{H}$ which an
observer $O$ with four-velocity $\bf v$ will associate with a congruence $\bf
u$ is equ... | [
{
"created": "Mon, 11 Jun 2018 07:47:46 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Apr 2019 08:10:24 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Apr 2019 04:47:55 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Apr 2019 03:49:14 GMT",
"version": "v4"
},
{
"c... | 2021-01-05 | [
[
"Kothawala",
"Dawood",
""
]
] | I point out a simple expression for the "Hubble" parameter $\mathscr{H}$, defined by Borde, Guth and Vilenkin (BGV) in their proof of past incompleteness of inflationary spacetimes. I show that the parameter $\mathscr{H}$ which an observer $O$ with four-velocity $\bf v$ will associate with a congruence $\bf u$ is equal... |
1612.05510 | Ahmet Baykal | Ahmet Baykal and Tekin Dereli | Linearized gravity in terms of differential forms | 17 pages, 56 references, typos fixed, published version | Eur.Phys.J.Plus(2017)132:52 | 10.1140/epjp/i2017-11345-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A technique to linearize gravitational field equations is developed in which
the perturbation metric coefficients are treated as second rank, symmetric,
1-form fields belonging to the Minkowski background spacetime by using the
exterior algebra of differential forms.
| [
{
"created": "Fri, 16 Dec 2016 15:35:04 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2017 07:59:28 GMT",
"version": "v2"
}
] | 2017-01-30 | [
[
"Baykal",
"Ahmet",
""
],
[
"Dereli",
"Tekin",
""
]
] | A technique to linearize gravitational field equations is developed in which the perturbation metric coefficients are treated as second rank, symmetric, 1-form fields belonging to the Minkowski background spacetime by using the exterior algebra of differential forms. |
1410.0581 | Eugen Radu | Burkhard Kleihaus, Jutta Kunz and Eugen Radu | Black ringoids: spinning balanced black objects in $d\geq 5$ dimensions
-- the codimension-two case | 51 pages, 16 figures | null | 10.1007/JHEP01(2015)117 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a general framework for the study of asymptotically flat black
objects with $k+1$ equal magnitude angular momenta in $d\geq 5$ spacetime
dimensions (with $0\leq k\leq \big[\frac{d-5}{2} \big]$). In this approach, the
dependence on all angular coordinates but one is factorized, which leads to a
codimension-... | [
{
"created": "Thu, 2 Oct 2014 15:05:05 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Dec 2014 19:10:53 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Dec 2014 12:32:05 GMT",
"version": "v3"
}
] | 2015-06-23 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
]
] | We propose a general framework for the study of asymptotically flat black objects with $k+1$ equal magnitude angular momenta in $d\geq 5$ spacetime dimensions (with $0\leq k\leq \big[\frac{d-5}{2} \big]$). In this approach, the dependence on all angular coordinates but one is factorized, which leads to a codimension-tw... |
1305.1876 | Sergiu I. Vacaru | Sergiu I. Vacaru | Covariant Renormalizable Gravity Theories on (Non) Commutative Tangent
Bundles | latex ws-procs975x65 proceeding style, 3 pages, summary of a talk at
MG13 (Stockholm, 2012), QG2, Quantum Gravity Phenomenology | Proceedings MG13 Meeting on General Relativity (World Scientific,
2015), p 2206-2208 | 10.1142/9789814623995_0398 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The field equations in modified gravity theories possess an important
decoupling property with respect to certain classes of nonholonomic frames.
This allows us to construct generic off--diagonal solutions depending on all
spacetime coordinates via generating and integration functions containing
(un--)broken symmetry... | [
{
"created": "Tue, 2 Apr 2013 05:31:39 GMT",
"version": "v1"
}
] | 2015-02-23 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | The field equations in modified gravity theories possess an important decoupling property with respect to certain classes of nonholonomic frames. This allows us to construct generic off--diagonal solutions depending on all spacetime coordinates via generating and integration functions containing (un--)broken symmetry p... |
2012.10455 | Filipe S. Miguel | Filipe S. Miguel | Interior Quasinormal Modes and Strong Cosmic Censorship | 15 pages, 9 figures | Phys. Rev. D 103, 064077 (2021) | 10.1103/PhysRevD.103.064077 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recent work has argued that the strong cosmic censorship (SCC) conjecture is
violated by near-extremal Reissner-Nordstr\"om de Sitter (RNdS) black holes but
respected by Kerr-de Sitter black holes. It has also been shown that the
conjecture is violated by near-extremal BTZ black holes. The latter result
relies on a c... | [
{
"created": "Fri, 18 Dec 2020 19:00:01 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Miguel",
"Filipe S.",
""
]
] | Recent work has argued that the strong cosmic censorship (SCC) conjecture is violated by near-extremal Reissner-Nordstr\"om de Sitter (RNdS) black holes but respected by Kerr-de Sitter black holes. It has also been shown that the conjecture is violated by near-extremal BTZ black holes. The latter result relies on a coi... |
1807.10342 | Thomas W. Baumgarte | Thomas W. Baumgarte | Aspherical deformations of the Choptuik spacetime | 13 pages, 16 figures; matches version published in PRD | Phys. Rev. D 98, 084012 (2018) | 10.1103/PhysRevD.98.084012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform dynamical and nonlinear numerical simulations to study critical
phenomena in the gravitational collapse of massless scalar fields in the
absence of spherical symmetry. We evolve axisymmetric sets of initial data and
examine the effects of deviation from spherical symmetry. For small deviations
we find valu... | [
{
"created": "Thu, 26 Jul 2018 20:05:38 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Feb 2019 18:40:57 GMT",
"version": "v2"
}
] | 2019-02-18 | [
[
"Baumgarte",
"Thomas W.",
""
]
] | We perform dynamical and nonlinear numerical simulations to study critical phenomena in the gravitational collapse of massless scalar fields in the absence of spherical symmetry. We evolve axisymmetric sets of initial data and examine the effects of deviation from spherical symmetry. For small deviations we find values... |
1401.0030 | Eolo Di Casola | Eolo Di Casola and Stefano Liberati and Sebastiano Sonego | Weak equivalence principle for self-gravitating bodies: A sieve for
purely metric theories of gravity | 17 pages, no figures. Tiny modifications to match the published
version | Physical Review D 89, 084053 (2014) | 10.1103/PhysRevD.89.084053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the almost-geodesic motion of self-gravitating test bodies as a
possible selection rule among metric theories of gravity. Starting from a
heuristic statement, the "gravitational weak equivalence principle", we build a
formal, operative test able to probe the validity of the principle for any
metric theory ... | [
{
"created": "Mon, 30 Dec 2013 21:49:16 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Apr 2014 16:09:04 GMT",
"version": "v2"
}
] | 2014-04-14 | [
[
"Di Casola",
"Eolo",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Sonego",
"Sebastiano",
""
]
] | We propose the almost-geodesic motion of self-gravitating test bodies as a possible selection rule among metric theories of gravity. Starting from a heuristic statement, the "gravitational weak equivalence principle", we build a formal, operative test able to probe the validity of the principle for any metric theory of... |
2303.09076 | Lokesh Kumar Duchaniya | L.K. Duchaniya, Kanika Gandhi, B. Mishra | Attractor behaviour of $f(T)$ modified gravity and the cosmic
acceleration | 14 pages, 9 figures, Accepted version Physics of the Dark Universe | Physics of the Dark Universe, 44 (2024) 101464 | 10.1016/j.dark.2024.101461 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have performed the dynamical system analysis of $f(T)$
gravity cosmological models at both background and perturbation levels. We have
presented three models pertaining to three distinct functional forms of $f(T)$.
The first form is that of the logarithmic form of the torsion scalar $T$, the
second ... | [
{
"created": "Thu, 16 Mar 2023 04:35:03 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Mar 2024 10:34:04 GMT",
"version": "v2"
}
] | 2024-03-20 | [
[
"Duchaniya",
"L. K.",
""
],
[
"Gandhi",
"Kanika",
""
],
[
"Mishra",
"B.",
""
]
] | In this paper, we have performed the dynamical system analysis of $f(T)$ gravity cosmological models at both background and perturbation levels. We have presented three models pertaining to three distinct functional forms of $f(T)$. The first form is that of the logarithmic form of the torsion scalar $T$, the second on... |
1505.06903 | Artur Alho | Artur Alho and Claes Uggla | Scalar field deformations of Lambda-CDM cosmology | Version 3: 36 pages, 12 figures with subfigures. Matches final
published version | Phys. Rev. D 92, 103502 (2015) | 10.1103/PhysRevD.92.103502 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper treats nonrelativistic matter and a scalar field $\phi$ with a
monotonically decreasing potential minimally coupled to gravity in flat
Friedmann-Lema\^{i}tre-Robertson-Walker cosmology. The field equations are
reformulated as a three-dimensional dynamical system on an extended compact
state space, compleme... | [
{
"created": "Tue, 26 May 2015 11:21:58 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Aug 2015 13:35:43 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Nov 2015 16:49:00 GMT",
"version": "v3"
}
] | 2015-11-11 | [
[
"Alho",
"Artur",
""
],
[
"Uggla",
"Claes",
""
]
] | This paper treats nonrelativistic matter and a scalar field $\phi$ with a monotonically decreasing potential minimally coupled to gravity in flat Friedmann-Lema\^{i}tre-Robertson-Walker cosmology. The field equations are reformulated as a three-dimensional dynamical system on an extended compact state space, complement... |
2208.05494 | Hong Lu | Hai-Shan Liu, H. Lu and Liang Ma | Thermodynamics of Taub-NUT and Plebanski Solutions | Latex, 43 pages, 4 graphs grouped into 1 figure, typos corrected,
references added and comments revised and added, more typos corrected | JHEP 10 (2022) 174 | 10.1007/JHEP10(2022)174 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We observe the parallel between the null Killing vector on the horizon and
degenerate Killing vectors at both north and south poles in Kerr-Taub-NUT and
general Plebanski solutions. This suggests a correspondence between the pairs
of the angular momentum/velocity and the NUT charge/potential. We treat the
time as a r... | [
{
"created": "Wed, 10 Aug 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jan 2023 06:49:05 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Nov 2023 01:36:25 GMT",
"version": "v3"
}
] | 2023-11-03 | [
[
"Liu",
"Hai-Shan",
""
],
[
"Lu",
"H.",
""
],
[
"Ma",
"Liang",
""
]
] | We observe the parallel between the null Killing vector on the horizon and degenerate Killing vectors at both north and south poles in Kerr-Taub-NUT and general Plebanski solutions. This suggests a correspondence between the pairs of the angular momentum/velocity and the NUT charge/potential. We treat the time as a rea... |
gr-qc/0607135 | Mohammad Nouri-Zonoz | N. Ahmadi, S. Khoeini-Moghaddam and M. Nouri-Zonoz | Quantum gravitational optics in the field of a gravitomagnetic monopole | 9 pages, title changed and the text abridged for publication in the
Journal of Physics: Conference series | J.Phys.Conf.Ser.67:012056,2007 | 10.1088/1742-6596/67/1/012056 | IPM/P-2006/041 | gr-qc | null | Vacuum polarization in QED in a background gravitational field induces
interactions which {\it effectively} modify the classical picture of light rays
as the null geodesics of spacetime. After a short introduction on the main
aspects of the quantum gravitational optics, as a nontrivial example, we study
this effect i... | [
{
"created": "Sat, 29 Jul 2006 15:46:35 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Dec 2006 12:45:35 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ahmadi",
"N.",
""
],
[
"Khoeini-Moghaddam",
"S.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | Vacuum polarization in QED in a background gravitational field induces interactions which {\it effectively} modify the classical picture of light rays as the null geodesics of spacetime. After a short introduction on the main aspects of the quantum gravitational optics, as a nontrivial example, we study this effect in ... |
2106.15925 | Arun Kumar | Arun Kumar, Sushant G. Ghosh and Sunil D. Maharaj | Nonsingular black hole chemistry | 12 pages, 8 figures | Physics of the Dark Universe, 30, 2020, 100634 | 10.1016/j.dark.2020.100634 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the nonsingular black hole in Anti de-Sitter background taking the
negative cosmological constant as the pressure of the system. We investigate
the horizon structure, and find the critical values $m_0$ and $\tilde{k}_0$,
such that $m>m_0$ (or $\tilde{k}<\tilde{k}_0$) corresponds to a black solution
with two ... | [
{
"created": "Wed, 30 Jun 2021 09:24:19 GMT",
"version": "v1"
}
] | 2021-07-01 | [
[
"Kumar",
"Arun",
""
],
[
"Ghosh",
"Sushant G.",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We study the nonsingular black hole in Anti de-Sitter background taking the negative cosmological constant as the pressure of the system. We investigate the horizon structure, and find the critical values $m_0$ and $\tilde{k}_0$, such that $m>m_0$ (or $\tilde{k}<\tilde{k}_0$) corresponds to a black solution with two ho... |
1304.1010 | Michael Bradley | Zolt\'an Keresztes, Mats Forsberg, Michael Bradley, Peter K.S. Dunsby
and L\'aszl\'o \'A. Gergely | Perturbations of Kantowski-Sachs models with a cosmological constant | Presented at ERE2012 meeting in Guimar\~aes | Springer Proceedings in Mathematics & Statistics 60, 289-293
(2014) | 10.1007/978-3-642-40157-2_40 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate perturbations of Kantowski-Sachs models with a positive
cosmological constant, using the gauge invariant 1+3 and 1+1+2 covariant splits
of spacetime together with a harmonic decomposition. The perturbations are
assumed to be vorticity-free and of perfect fluid type, but otherwise include
general scalar... | [
{
"created": "Wed, 3 Apr 2013 16:51:37 GMT",
"version": "v1"
}
] | 2014-09-12 | [
[
"Keresztes",
"Zoltán",
""
],
[
"Forsberg",
"Mats",
""
],
[
"Bradley",
"Michael",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Gergely",
"László Á.",
""
]
] | We investigate perturbations of Kantowski-Sachs models with a positive cosmological constant, using the gauge invariant 1+3 and 1+1+2 covariant splits of spacetime together with a harmonic decomposition. The perturbations are assumed to be vorticity-free and of perfect fluid type, but otherwise include general scalar, ... |
1806.06596 | Sudipta Sarkar | Akash K Mishra, Mostafizur Rahman, and Sudipta Sarkar | Black Hole Topology in $f(R)$ Gravity | 13 Pages, No Figures, Accepted for Publication in Classical and
Quantum Gravity | null | 10.1088/1361-6382/aacc20 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking's topology theorem in general relativity restricts the cross-section
of the event horizon of a black hole in $3+1$ dimension to be either spherical
or toroidal. The toroidal case is ruled out by the topology censorship
theorems. In this article, we discuss the generalization of this result to
black holes in $... | [
{
"created": "Mon, 18 Jun 2018 10:56:43 GMT",
"version": "v1"
}
] | 2018-07-11 | [
[
"Mishra",
"Akash K",
""
],
[
"Rahman",
"Mostafizur",
""
],
[
"Sarkar",
"Sudipta",
""
]
] | Hawking's topology theorem in general relativity restricts the cross-section of the event horizon of a black hole in $3+1$ dimension to be either spherical or toroidal. The toroidal case is ruled out by the topology censorship theorems. In this article, we discuss the generalization of this result to black holes in $f(... |
2008.02607 | Stav Zalel | Stav Zalel | The structure of covtree: searching for manifestly covariant causal set
dynamics | 34 pages, 8 figures, 2 tables | null | 10.1088/1361-6382/abc135 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Covtree - a partial order on certain sets of finite, unlabeled causal sets -
is a manifestly covariant framework for causal set dynamics. Here, as a first
step in picking out a class of physically well-motivated covtree dynamics, we
study the structure of covtree and the relationship between its paths and their
corre... | [
{
"created": "Thu, 6 Aug 2020 12:35:06 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Zalel",
"Stav",
""
]
] | Covtree - a partial order on certain sets of finite, unlabeled causal sets - is a manifestly covariant framework for causal set dynamics. Here, as a first step in picking out a class of physically well-motivated covtree dynamics, we study the structure of covtree and the relationship between its paths and their corresp... |
2007.01123 | Luis Granda | L. N. Granda | $\Lambda$CDM without cosmological constant | 39 pages, 9 figures. version published in CQG | Class. Quantum Grav. 38 205007, 2021 | 10.1088/1361-6382/ac25e4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A type of exponential correction to General Relativity gives viable modified
gravity model of dark energy. The model behaves as $R-2\Lambda$ at large
curvature where an effective cosmological constant appears, but it becomes zero
in flat space time. The cosmic evolution of the main density parameters is
consistent wi... | [
{
"created": "Wed, 1 Jul 2020 03:48:06 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jan 2022 03:21:23 GMT",
"version": "v2"
}
] | 2022-01-13 | [
[
"Granda",
"L. N.",
""
]
] | A type of exponential correction to General Relativity gives viable modified gravity model of dark energy. The model behaves as $R-2\Lambda$ at large curvature where an effective cosmological constant appears, but it becomes zero in flat space time. The cosmic evolution of the main density parameters is consistent with... |
1510.07178 | James M. Overduin | Paul S. Wesson and James M. Overduin | Waves and causality in higher dimensions | 15 pages, no figures | Physics Letters B750 (2015) 302-305 | 10.1016/j.physletb.2015.09.003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a new, wave-like solution of the field equations of five-dimensional
relativity. In ordinary three-dimensional space, the waves resemble de Broglie
or matter waves, whose puzzling behaviour can be better understood in terms of
one or more extra dimensions. Causality is appropriately defined by a null
higher-d... | [
{
"created": "Sat, 24 Oct 2015 19:38:41 GMT",
"version": "v1"
}
] | 2015-10-27 | [
[
"Wesson",
"Paul S.",
""
],
[
"Overduin",
"James M.",
""
]
] | We give a new, wave-like solution of the field equations of five-dimensional relativity. In ordinary three-dimensional space, the waves resemble de Broglie or matter waves, whose puzzling behaviour can be better understood in terms of one or more extra dimensions. Causality is appropriately defined by a null higher-dim... |
1503.01092 | Yen Chin Ong | Yen Chin Ong | Never Judge a Black Hole by Its Area | references updated | JCAP04(2015)003 | 10.1088/1475-7516/2015/04/003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Christodoulou and Rovelli have shown that black holes have large interiors
that grow asymptotically linearly in advanced time, and speculated that this
may be relevant to the information loss paradox. We show that there is no
simple relation between the interior volume of an arbitrary black hole and its
horizon area.... | [
{
"created": "Tue, 3 Mar 2015 20:37:34 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 2015 20:23:56 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Apr 2015 15:01:49 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Jul 2015 12:25:56 GMT",
"version": "v4"
}
] | 2015-07-28 | [
[
"Ong",
"Yen Chin",
""
]
] | Christodoulou and Rovelli have shown that black holes have large interiors that grow asymptotically linearly in advanced time, and speculated that this may be relevant to the information loss paradox. We show that there is no simple relation between the interior volume of an arbitrary black hole and its horizon area. T... |
0811.4236 | Yuri Pavlov | Yu. V. Pavlov | Space-Time Description of Scalar Particle Creation by a Homogeneous
Isotropic Gravitational Field | 7 pages, 3 figures | Grav.Cosmol.14:314-320,2008 | 10.1134/S020228930804004X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give the generalization of the method of the space-time description of
particle creation by a gravitational field for a scalar field with nonconformal
coupling to the curvature. The space-time correlation function is obtained for
a created pair of the quasi-particles, corresponding to a diagonal form of the
instan... | [
{
"created": "Wed, 26 Nov 2008 07:24:42 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Pavlov",
"Yu. V.",
""
]
] | We give the generalization of the method of the space-time description of particle creation by a gravitational field for a scalar field with nonconformal coupling to the curvature. The space-time correlation function is obtained for a created pair of the quasi-particles, corresponding to a diagonal form of the instanta... |
1705.01177 | Rod Aros Mr. | Rodrigo Aros | The entropy of Taub-Bolt-AdS from an improved action principle | 11 pages | Phys. Rev. D 96, 024022 (2017) | 10.1103/PhysRevD.96.024022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article the study of four dimensional spaces with NUT charges and
their ground states is continued. In particular, through the introduction of an
improved action principle containing topological densities, it is shown that
these spaces have simple and sound thermodynamic relations. As an example the
entropy o... | [
{
"created": "Tue, 2 May 2017 21:34:29 GMT",
"version": "v1"
},
{
"created": "Tue, 23 May 2017 14:35:53 GMT",
"version": "v2"
}
] | 2017-07-19 | [
[
"Aros",
"Rodrigo",
""
]
] | In this article the study of four dimensional spaces with NUT charges and their ground states is continued. In particular, through the introduction of an improved action principle containing topological densities, it is shown that these spaces have simple and sound thermodynamic relations. As an example the entropy of ... |
gr-qc/0504127 | Myung Seok Yoon | Wontae Kim, Young-Jai Park, Edwin J. Son, Myung Seok Yoon | Statistical Entropy and Superradiance in 2+1 Dimensional Acoustic Black
Holes | 13 pages, 1 figure. Change in authors. The improved version to be
published in J. Kor. Phys. Soc | J.Korean Phys.Soc. 49 (2006) 15-20 | null | null | gr-qc | null | We study ``draining bathtub'' as an acoustic analogue of a three-dimensional
rotating black hole. Rotating fluid near the sonic horizon necessarily gives
rise to the superradiant modes, which are partially responsible for the
thermodynamic quantities in this rotating vortex-like hole. Using the recently
suggested thi... | [
{
"created": "Tue, 26 Apr 2005 00:49:32 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Mar 2006 06:52:40 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kim",
"Wontae",
""
],
[
"Park",
"Young-Jai",
""
],
[
"Son",
"Edwin J.",
""
],
[
"Yoon",
"Myung Seok",
""
]
] | We study ``draining bathtub'' as an acoustic analogue of a three-dimensional rotating black hole. Rotating fluid near the sonic horizon necessarily gives rise to the superradiant modes, which are partially responsible for the thermodynamic quantities in this rotating vortex-like hole. Using the recently suggested thin-... |
1211.2738 | Israel Quiros | Ricardo Garcia-Salcedo, Tame Gonzalez, Israel Quiros | Phase Space Dynamics of Non-Gravitational Interactions between Dark
Matter and Dark Energy: The Case of Ghost Dark Energy | 19 pages, 2 eps figures. A remark about the relationship between
ghost dark energy models and models of dark energy with a generalized
equation of state added. New bibliographic references | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phase space asymptotics of the so called Veneziano ghost dark
energy models. Models where the ghost field's energy density: i)
$\rho_{ghost}\propto H$, and ii) $\rho_{ghost}\propto H+H^2$, are investigated.
Both, cases with and without additional non-gravitational interaction between
cold dark matter and... | [
{
"created": "Mon, 12 Nov 2012 19:14:15 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2012 03:33:17 GMT",
"version": "v2"
}
] | 2012-11-16 | [
[
"Garcia-Salcedo",
"Ricardo",
""
],
[
"Gonzalez",
"Tame",
""
],
[
"Quiros",
"Israel",
""
]
] | We study the phase space asymptotics of the so called Veneziano ghost dark energy models. Models where the ghost field's energy density: i) $\rho_{ghost}\propto H$, and ii) $\rho_{ghost}\propto H+H^2$, are investigated. Both, cases with and without additional non-gravitational interaction between cold dark matter and g... |
gr-qc/0507064 | Kamal Nandi | K.K. Nandi, N.G. Migranov, J.C. Evans, and M.K. Amedeker | Planetary and Light Motions From Newtoinian Theory: An Amusing Exercise | 7 pages | Eur. J. Phys. vol. 27 (2006) 429-435 | 10.1088/0143-0807/27/2/024 | null | gr-qc | null | We attempt to see how closely we can formally obtain the planetary and light
path equations of General Relativity by employing certain operations on the
familiar Newtonian equation. This article is intended neither as an alternative
to nor as a tool for grasping Einstein's General Relativity. Though the
exercise is u... | [
{
"created": "Fri, 15 Jul 2005 05:00:45 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Mar 2006 18:14:33 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Nandi",
"K. K.",
""
],
[
"Migranov",
"N. G.",
""
],
[
"Evans",
"J. C.",
""
],
[
"Amedeker",
"M. K.",
""
]
] | We attempt to see how closely we can formally obtain the planetary and light path equations of General Relativity by employing certain operations on the familiar Newtonian equation. This article is intended neither as an alternative to nor as a tool for grasping Einstein's General Relativity. Though the exercise is und... |
2007.06419 | Thanasis Giannakopoulos | Thanasis Giannakopoulos, David Hilditch, Miguel Zilhao | Hyperbolicity of General Relativity in Bondi-like gauges | 19 pages, 7 figures, updated to match published version | Phys. Rev. D 102, 064035 (2020) | 10.1103/PhysRevD.102.064035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bondi-like (single-null) characteristic formulations of general relativity
are used for numerical work in both asymptotically flat and anti-de Sitter
spacetimes. Well-posedness of the resulting systems of partial differential
equations, however, remains an open question. The answer to this question
affects accuracy, ... | [
{
"created": "Mon, 13 Jul 2020 14:51:14 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Oct 2020 11:04:31 GMT",
"version": "v2"
}
] | 2020-10-09 | [
[
"Giannakopoulos",
"Thanasis",
""
],
[
"Hilditch",
"David",
""
],
[
"Zilhao",
"Miguel",
""
]
] | Bondi-like (single-null) characteristic formulations of general relativity are used for numerical work in both asymptotically flat and anti-de Sitter spacetimes. Well-posedness of the resulting systems of partial differential equations, however, remains an open question. The answer to this question affects accuracy, an... |
1101.5281 | Sergey Sushkov | P.E. Kashargin and S.V. Sushkov | Rotating thin-shell wormhole from glued Kerr spacetimes | 8 pages, 3 figures, accepted for publication in Gravitation and
Cosmology | Grav.Cosmol.17:119-125,2011 | 10.1134/S0202289311020149 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a model of a rotating wormhole made by cutting and pasting two
Kerr spacetimes. As a result, we obtain a rotating thin-shell wormhole with
exotic matter at the throat. Two candidates for the exotic matter are
considered: (i) a perfect fluid; (ii) an anisotropic fluid. We show that a
perfect fluid is unab... | [
{
"created": "Thu, 27 Jan 2011 13:29:59 GMT",
"version": "v1"
}
] | 2015-03-18 | [
[
"Kashargin",
"P. E.",
""
],
[
"Sushkov",
"S. V.",
""
]
] | We construct a model of a rotating wormhole made by cutting and pasting two Kerr spacetimes. As a result, we obtain a rotating thin-shell wormhole with exotic matter at the throat. Two candidates for the exotic matter are considered: (i) a perfect fluid; (ii) an anisotropic fluid. We show that a perfect fluid is unable... |
gr-qc/0105002 | Marcelo J. Reboucas | G.I. Gomero, M.J. Reboucas, R. Tavakol | Detectability of Cosmic Topology in Almost Flat Universes | 18 pages, 3 figures, LaTeX2e. Two references added. Minors
corrections in section 4. To appear in Class. Quantum Grav. {\bf 18} (2001)
in the present form | Class.Quant.Grav.18:4461-4476,2001 | 10.1088/0264-9381/18/21/306 | null | gr-qc astro-ph hep-th math-ph math.MP | null | Recent observations suggest that the ratio of the total density to the
critical density of the universe, $\Omega_0$, is likely to be very close to
one, with a significant proportion of this energy being in the form of a dark
component with negative pressure. Motivated by this result, we study the
question of observat... | [
{
"created": "Wed, 2 May 2001 00:49:39 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Aug 2001 01:57:36 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Sep 2001 20:04:26 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Gomero",
"G. I.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Tavakol",
"R.",
""
]
] | Recent observations suggest that the ratio of the total density to the critical density of the universe, $\Omega_0$, is likely to be very close to one, with a significant proportion of this energy being in the form of a dark component with negative pressure. Motivated by this result, we study the question of observatio... |
gr-qc/9712084 | Carsten Gundlach | Carsten Gundlach (Albert Einstein Institut, Potsdam) | Critical phenomena in gravitational collapse (review paper) | 46 p. Latex. Many minor corrections and extensions. To appear in Adv.
Theor. Math. Phys | Adv.Theor.Math.Phys.2:1-49,1998 | null | null | gr-qc | null | As first discovered by Choptuik, the black hole threshold in the space of
initial data for general relativity shows both surprising structure and
surprising simplicity. Universality, power-law scaling of the black hole mass,
and scale echoing have given rise to the term "critical phenomena". They are
explained by the... | [
{
"created": "Sun, 21 Dec 1997 16:52:53 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 1998 15:16:57 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jan 1998 15:10:58 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Gundlach",
"Carsten",
"",
"Albert Einstein Institut, Potsdam"
]
] | As first discovered by Choptuik, the black hole threshold in the space of initial data for general relativity shows both surprising structure and surprising simplicity. Universality, power-law scaling of the black hole mass, and scale echoing have given rise to the term "critical phenomena". They are explained by the e... |
1201.4543 | Massimiliano Rinaldi | Massimiliano Rinaldi | Aspects of Quantum Gravity in Cosmology | 15 pages, 1 figure. Invited review for Modern Physics Letter A.
Version 2: minor typos corrected, few references added | MPLA 27, 7 (2012) 1230008 | 10.1142/S021773231230008X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review some aspects of quantum gravity in the context of cosmology. In
particular, we focus on models with a phenomenology accessible to current and
near-future observations, as the early Universe might be our only chance to
peep through the quantum gravity realm.
| [
{
"created": "Sun, 22 Jan 2012 09:27:55 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Feb 2012 11:07:39 GMT",
"version": "v2"
}
] | 2012-03-30 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | We review some aspects of quantum gravity in the context of cosmology. In particular, we focus on models with a phenomenology accessible to current and near-future observations, as the early Universe might be our only chance to peep through the quantum gravity realm. |
gr-qc/0509063 | Yuan K. Ha | Yuan K. Ha | Horizon Mass Theorem | A new theorem for black holes is established | Int.J.Mod.Phys. D14 (2005) 2219-2226 | 10.1142/S0218271805008108 | null | gr-qc hep-th | null | A new theorem for black holes is found. It is called the horizon mass
theorem. The horizon mass is the mass which cannot escape from the horizon of a
black hole. For all black holes: neutral, charged or rotating, the horizon mass
is always twice the irreducible mass observed at infinity. Previous theorems on
black ho... | [
{
"created": "Thu, 15 Sep 2005 19:17:53 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ha",
"Yuan K.",
""
]
] | A new theorem for black holes is found. It is called the horizon mass theorem. The horizon mass is the mass which cannot escape from the horizon of a black hole. For all black holes: neutral, charged or rotating, the horizon mass is always twice the irreducible mass observed at infinity. Previous theorems on black hole... |
1307.6281 | Todd Oliynyk | Todd A. Oliynyk | Cosmological Newtonian limit | Changed title and fixed typos to agree with published version | Phys. Rev. D 89 (2014), 124002 | 10.1103/PhysRevD.89.124002 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a wide class of inhomogeneous relativistic solutions that are
well approximated on cosmological scales by solutions of Newtonian gravity.
Error estimates measuring the difference between the Newtonian and relativistic
solutions are given. The solutions presented here unambiguously demonstrate
that it is p... | [
{
"created": "Wed, 24 Jul 2013 01:38:28 GMT",
"version": "v1"
},
{
"created": "Thu, 8 May 2014 03:02:35 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jun 2014 23:36:22 GMT",
"version": "v3"
}
] | 2014-06-06 | [
[
"Oliynyk",
"Todd A.",
""
]
] | We describe a wide class of inhomogeneous relativistic solutions that are well approximated on cosmological scales by solutions of Newtonian gravity. Error estimates measuring the difference between the Newtonian and relativistic solutions are given. The solutions presented here unambiguously demonstrate that it is pos... |
1807.05934 | Denis Dobkowski-Ry{\l}ko | Denis Dobkowski-Ry{\l}ko, Wojciech Kami\'nski, Jerzy Lewandowski, Adam
Szereszewski | The Near Horizon Geometry Equation on Compact 2-Manifolds Including the
General Solution for g > 0 | null | null | 10.1016/j.physletb.2018.08.048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Near Horizon Geometry (NHG) equation with a cosmological constant
{\Lambda} is considered on compact 2-dimensional manifolds. It is shown that
every solution satisfies the Type D equation at every point of the manifold. A
similar result known in the literature was valid only for non-degenerate in a
suitable way p... | [
{
"created": "Mon, 16 Jul 2018 15:50:27 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jul 2018 18:48:31 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Dobkowski-Ryłko",
"Denis",
""
],
[
"Kamiński",
"Wojciech",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Szereszewski",
"Adam",
""
]
] | The Near Horizon Geometry (NHG) equation with a cosmological constant {\Lambda} is considered on compact 2-dimensional manifolds. It is shown that every solution satisfies the Type D equation at every point of the manifold. A similar result known in the literature was valid only for non-degenerate in a suitable way poi... |
1903.04725 | Swastik Chowbay | C.Swastik, P K Suresh and Barun Maity | Bouncing Universe with exotic radiation | 10 pages, 2 figures | Rep.Adv.Phys.Sci. Vol. 4, No 1 (2020) 20500012 | 10.1142/S2424942420500012 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Scenario bouncing can give the cosmology singularity problem a possible way
out. Finding a solution for the universe's bouncing model requires proper
estimation of the state equation. We present two such state equations that give
us the solution for a bounce. One such case is the exotic radiation, where we
assumed th... | [
{
"created": "Tue, 12 Mar 2019 04:28:46 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2020 04:55:01 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Mar 2020 13:44:22 GMT",
"version": "v3"
},
{
"created": "Sat, 26 Dec 2020 08:06:45 GMT",
"version": "v4"
}
] | 2020-12-29 | [
[
"Swastik",
"C.",
""
],
[
"Suresh",
"P K",
""
],
[
"Maity",
"Barun",
""
]
] | Scenario bouncing can give the cosmology singularity problem a possible way out. Finding a solution for the universe's bouncing model requires proper estimation of the state equation. We present two such state equations that give us the solution for a bounce. One such case is the exotic radiation, where we assumed that... |
1803.03955 | Suddhasattwa Brahma | Suddhasattwa Brahma, Alexey Golovnev, Dong-han Yeom | On singularity-resolution in mimetic gravity | 9 pages | Physics Letters B 782 (2018) 280 | 10.1016/j.physletb.2018.05.039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it was shown that modified mimetic gravity, with a $f(\square\phi)$
term, results in a singularity-free model of gravity, for both cosmological and
black hole spacetimes [1, 2]. In this work, we analyze this model further and
show that, since the function $f$ was tuned to vanish rapidly for small values
of ... | [
{
"created": "Sun, 11 Mar 2018 12:24:58 GMT",
"version": "v1"
}
] | 2018-06-01 | [
[
"Brahma",
"Suddhasattwa",
""
],
[
"Golovnev",
"Alexey",
""
],
[
"Yeom",
"Dong-han",
""
]
] | Recently, it was shown that modified mimetic gravity, with a $f(\square\phi)$ term, results in a singularity-free model of gravity, for both cosmological and black hole spacetimes [1, 2]. In this work, we analyze this model further and show that, since the function $f$ was tuned to vanish rapidly for small values of th... |
gr-qc/9605071 | Ting Yu | Ting Yu | Decoherence and Localization in Quantum Two-Level Systems | 30 pages, revtex, no figures | Physica A248:393,1998 | null | IMPERIAL/TP/95-96/44 | gr-qc quant-ph | null | We study and compare the decoherent histories approach, the
environment-induced decoherence and the localization properties of thesolutions
to the stochastic Schr\"{o}dinger equation in quantum jump simulationand
quantum state diffusion approaches, for a quantum two-level system model. We
show, in particular, that th... | [
{
"created": "Fri, 31 May 1996 13:44:37 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Yu",
"Ting",
""
]
] | We study and compare the decoherent histories approach, the environment-induced decoherence and the localization properties of thesolutions to the stochastic Schr\"{o}dinger equation in quantum jump simulationand quantum state diffusion approaches, for a quantum two-level system model. We show, in particular, that ther... |
2211.08336 | Michele Grasso | Michele Grasso | BiGONLight: a new package for computing optical observables in Numerical
Relativity | Thesis submitted to the Center for Theoretical Physics for the degree
of Doctor of Philosophy in Physics | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The investigation of relativistic effects in the most general way requires a
unified treatment of light propagation in cosmology. This goal can be achieved
with the new interpretation of the geodesic deviation equation in terms of the
bilocal geodesic operators (BGO). The BGO formalism extends the standard
formulatio... | [
{
"created": "Tue, 15 Nov 2022 17:49:56 GMT",
"version": "v1"
}
] | 2022-11-16 | [
[
"Grasso",
"Michele",
""
]
] | The investigation of relativistic effects in the most general way requires a unified treatment of light propagation in cosmology. This goal can be achieved with the new interpretation of the geodesic deviation equation in terms of the bilocal geodesic operators (BGO). The BGO formalism extends the standard formulation,... |
2105.12454 | Adrien Druart | Geoffrey Comp\`ere and Adrien Druart | Complete set of quasi-conserved quantities for spinning particles around
Kerr | Minor corrections and proof of triviality of all mixed-symmetry
Killing tensor in Minkowski spacetime added | SciPost Phys. 12, 012 (2022) | 10.21468/SciPostPhys.12.1.012 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the conserved quantities of the Mathisson-Papapetrou-Tulczyjew
equations describing the motion of spinning particles on a fixed background.
Assuming Ricci-flatness and the existence of a Killing-Yano tensor, we
demonstrate that besides the two non-trivial quasi-conserved quantities, i.e.
conserved at linea... | [
{
"created": "Wed, 26 May 2021 10:31:07 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jul 2021 10:45:51 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Oct 2021 09:45:03 GMT",
"version": "v3"
}
] | 2022-01-12 | [
[
"Compère",
"Geoffrey",
""
],
[
"Druart",
"Adrien",
""
]
] | We revisit the conserved quantities of the Mathisson-Papapetrou-Tulczyjew equations describing the motion of spinning particles on a fixed background. Assuming Ricci-flatness and the existence of a Killing-Yano tensor, we demonstrate that besides the two non-trivial quasi-conserved quantities, i.e. conserved at linear ... |
1004.3324 | Mercedes Velazquez | Riccardo Capovilla, Merced Montesinos, Mercedes Velazquez | Minimally modified self-dual 2-forms gravity | Corrected typos | Class.Quant.Grav.27:145011,2010 | 10.1088/0264-9381/27/14/145011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first order Plebanski formulation of (complex) general relativity (GR) in
terms of self-dual 2-forms admits a generalization, proposed by Krasnov, that
is qualitatively different from other possible generalizations of GR in terms
of metric variables. In this paper, we investigate, within a minimal
modification, a... | [
{
"created": "Mon, 19 Apr 2010 23:37:02 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jun 2010 19:19:22 GMT",
"version": "v2"
}
] | 2010-06-03 | [
[
"Capovilla",
"Riccardo",
""
],
[
"Montesinos",
"Merced",
""
],
[
"Velazquez",
"Mercedes",
""
]
] | The first order Plebanski formulation of (complex) general relativity (GR) in terms of self-dual 2-forms admits a generalization, proposed by Krasnov, that is qualitatively different from other possible generalizations of GR in terms of metric variables. In this paper, we investigate, within a minimal modification, and... |
2104.13966 | Koushik Chakraborty | Koushik Chakraborty, Abdul Aziz, Farook Rahaman, Saibal Ray | Quark matter supported wormhole in third order Lovelock gravity | 15 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally believed that wormholes are supported by exotic matter
violating Null Energy Condition (NEC). However, various studies of wormhole
geometries under Lovelock theories of gravity have reported existence of
wormhole supported by matter satisfying NEC. Being inspired by these results,
we explore the possi... | [
{
"created": "Sat, 24 Apr 2021 13:49:52 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Jun 2021 15:11:23 GMT",
"version": "v2"
}
] | 2021-06-15 | [
[
"Chakraborty",
"Koushik",
""
],
[
"Aziz",
"Abdul",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Ray",
"Saibal",
""
]
] | It is generally believed that wormholes are supported by exotic matter violating Null Energy Condition (NEC). However, various studies of wormhole geometries under Lovelock theories of gravity have reported existence of wormhole supported by matter satisfying NEC. Being inspired by these results, we explore the possibi... |
1802.02990 | Yosef Zlochower | Jam Sadiq, Yosef Zlochower, Hiroyuki Nakano | Comparing an analytical spacetime metric for a merging binary to a fully
nonlinear numerical evolution using curvature scalars | version accepted to PRD | Phys. Rev. D 97, 084007 (2018) | 10.1103/PhysRevD.97.084007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new geometrically invariant prescription for comparing two
different spacetimes based on geodesic deviation. We use this method to compare
a family of recently introduced analytical spacetime representing inspiraling
black-hole binaries to fully nonlinear numerical solutions to the Einstein
equations. ... | [
{
"created": "Thu, 8 Feb 2018 18:06:04 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Mar 2018 13:21:31 GMT",
"version": "v2"
}
] | 2018-04-11 | [
[
"Sadiq",
"Jam",
""
],
[
"Zlochower",
"Yosef",
""
],
[
"Nakano",
"Hiroyuki",
""
]
] | We introduce a new geometrically invariant prescription for comparing two different spacetimes based on geodesic deviation. We use this method to compare a family of recently introduced analytical spacetime representing inspiraling black-hole binaries to fully nonlinear numerical solutions to the Einstein equations. Ou... |
gr-qc/0610105 | M Iftime | Mihaela D. Iftime | The Hole Argument. Physical Events and the Superspace | 14 pages | Syst. Integrables et Theorie des Champs Quant., eds J. Kouneiher
et all, Hermann's Editeurs, pp. 241-254, 2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The 'hole argument'(the English translation of German 'Lochbetrachtung') was
formulated by Albert Einstein in 1913 in his search for a relativistic theory
of gravitation. The hole argument was deemed to be based on a trivial error of
Einstein, until 1980 when John Stachel (Talk on Einsteins Search for General
Covaria... | [
{
"created": "Sat, 21 Oct 2006 16:29:45 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Dec 2008 20:39:37 GMT",
"version": "v2"
}
] | 2008-12-16 | [
[
"Iftime",
"Mihaela D.",
""
]
] | The 'hole argument'(the English translation of German 'Lochbetrachtung') was formulated by Albert Einstein in 1913 in his search for a relativistic theory of gravitation. The hole argument was deemed to be based on a trivial error of Einstein, until 1980 when John Stachel (Talk on Einsteins Search for General Covarianc... |
gr-qc/0306037 | W. F. Kao | W.F. Kao | Parameterization of the Equation of State and the expansion history of
the very recent universe | 7 pages | null | null | null | gr-qc | null | Motivated by a nice result shown by E. Linder, a detailed discussion on the
choice of the expansion parameters of the Maclaurin series for the equation of
states of a perfect fluid is presented in this paper. We show that their nice
recent result is in fact a linear approximation to the full Maclaurin series as
a pow... | [
{
"created": "Mon, 9 Jun 2003 22:15:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kao",
"W. F.",
""
]
] | Motivated by a nice result shown by E. Linder, a detailed discussion on the choice of the expansion parameters of the Maclaurin series for the equation of states of a perfect fluid is presented in this paper. We show that their nice recent result is in fact a linear approximation to the full Maclaurin series as a power... |
0810.2626 | Farhat Zaripov SH. | F. Zaripov | A conformally invariant generalization of string theory to
higher-dimensional objects. Hierarchy of coupling constants | 9 pages, no figures | Grav.Cosmol.13:273-281,2007 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest a conformally invariant generalization of string theory to
higher-dimensional objects. As such a model, we consider a conformally
invariant $\sigma$ model. For this theory, the Hamiltonian formalism is
constructed, and the full set of constraints is found. The equations obtained
are studied under a fixed g... | [
{
"created": "Wed, 15 Oct 2008 08:26:12 GMT",
"version": "v1"
}
] | 2009-01-06 | [
[
"Zaripov",
"F.",
""
]
] | We suggest a conformally invariant generalization of string theory to higher-dimensional objects. As such a model, we consider a conformally invariant $\sigma$ model. For this theory, the Hamiltonian formalism is constructed, and the full set of constraints is found. The equations obtained are studied under a fixed gau... |
gr-qc/9910017 | Capozziello salvatore | S. Capozziello, G. Lambiase and G.Scarpetta | Generalized Uncertainty Principle from Quantum Geometry | 9 pages, LATEX file, to appear in Int. Jou. Theor. Phys | Int.J.Theor.Phys. 39 (2000) 15-22 | null | null | gr-qc | null | The generalized uncertainty principle of string theory is derived in the
framework of
Quantum Geometry by taking into account the existence of an upper limit on
the acceleration of massive particles.
| [
{
"created": "Tue, 5 Oct 1999 17:18:39 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Scarpetta",
"G.",
""
]
] | The generalized uncertainty principle of string theory is derived in the framework of Quantum Geometry by taking into account the existence of an upper limit on the acceleration of massive particles. |
gr-qc/0202028 | Ioannis Raptis | Anastasios Mallios | Remarks on "singularities" | 30 pages, revised, updated and expanded version | null | null | null | gr-qc math-ph math.MP | null | We present herewith certain thoughts on the important subject of nowadays
physics, pertaining to the so-called ``singularities'', that emanated from
looking at the theme in terms of ADG (: abstract differential geometry). Thus,
according to the latter perspective, we can involve ``singularities'' in our
arguments, wh... | [
{
"created": "Fri, 8 Feb 2002 11:55:15 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2002 14:57:11 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Oct 2002 10:09:10 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Mallios",
"Anastasios",
""
]
] | We present herewith certain thoughts on the important subject of nowadays physics, pertaining to the so-called ``singularities'', that emanated from looking at the theme in terms of ADG (: abstract differential geometry). Thus, according to the latter perspective, we can involve ``singularities'' in our arguments, whil... |
2108.01339 | Yunlong Zheng | Mian Zhu, Amara Ilyas, Yunlong Zheng, Yi-Fu Cai and Emmanuel
N.Saridakis | Scalar and Tensor Perturbations in DHOST Bounce Cosmology | 31 pages, 3 figures, version accepted for publication in JCAP | JCAP11(2021)045 | 10.1088/1475-7516/2021/11/045 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the bounce realization in the framework of DHOST cosmology,
focusing on the relation with observables. We perform a detailed analysis of
the scalar and tensor perturbations during the Ekpyrotic contraction phase, the
bounce phase, and the fast-roll expansion phase, calculating the power spectra,
the sp... | [
{
"created": "Tue, 3 Aug 2021 07:40:06 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Nov 2021 22:09:46 GMT",
"version": "v2"
}
] | 2021-11-24 | [
[
"Zhu",
"Mian",
""
],
[
"Ilyas",
"Amara",
""
],
[
"Zheng",
"Yunlong",
""
],
[
"Cai",
"Yi-Fu",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We investigate the bounce realization in the framework of DHOST cosmology, focusing on the relation with observables. We perform a detailed analysis of the scalar and tensor perturbations during the Ekpyrotic contraction phase, the bounce phase, and the fast-roll expansion phase, calculating the power spectra, the spec... |
2303.13666 | V\'ictor Jaramillo | V\'ictor Jaramillo, Daniel Mart\'inez-Carbajal, Juan Carlos Degollado,
Dar\'io N\'u\~nez | Born-Infeld boson stars | 12 pages | null | 10.1088/1475-7516/2023/07/017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Einstein-Klein-Gordon system coupled to the Born-Infeld
electrodynamics. We explore the solution space of a static spherically
symmetric, complex scalar field minimally coupled to both gravitational and
electromagnetic fields. The resulting asymptotically flat solutions resemble
the known charged boson s... | [
{
"created": "Thu, 23 Mar 2023 20:49:17 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Jaramillo",
"Víctor",
""
],
[
"Martínez-Carbajal",
"Daniel",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Núñez",
"Darío",
""
]
] | We study the Einstein-Klein-Gordon system coupled to the Born-Infeld electrodynamics. We explore the solution space of a static spherically symmetric, complex scalar field minimally coupled to both gravitational and electromagnetic fields. The resulting asymptotically flat solutions resemble the known charged boson sta... |
gr-qc/9809022 | Alberto Balfagon Costa | A. Balfagon (1), X. Jaen (2) ((1) Institut Quimic de Sarria,
Laboratori de Fisica Matematica, Societat Catalana de Fisica (I.E.C.)
Universitat Ramon Llull (2) Universitat Politecnica de Catalunya, Laboratori
de Fisica Matematica, Societat Catalana de Fisica (I.E.C.)) | Simplifying Tensor Polynomials with Indices | Latex, 21 pages. Submitted to Journal of Symbolic Computation;
e-mail: abalf@iqs.url.es, jaen@baldufa.upc.es | null | null | null | gr-qc math-ph math.MP physics.comp-ph | null | We are presenting an algorithm capable of simplifying tensor polynomials with
indices when the building tensors have index symmetry properties. These
properties include simple symmetry, cyclicity and those due to the presence of
partial and covariant derivatives. We are also including some examples using
the Riemann ... | [
{
"created": "Fri, 4 Sep 1998 09:28:03 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Sep 1998 10:23:55 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Balfagon",
"A.",
""
],
[
"Jaen",
"X.",
""
]
] | We are presenting an algorithm capable of simplifying tensor polynomials with indices when the building tensors have index symmetry properties. These properties include simple symmetry, cyclicity and those due to the presence of partial and covariant derivatives. We are also including some examples using the Riemann te... |
gr-qc/9512039 | Brien Nolan | Brien C. Nolan | The Goldberg--Kerr Approach to Lorentz Covariant Gravity | 28 pages, revtex, uuencoded | Proc.Roy.Irish Acad.(Sect.A) 97 (1997) 31-59 | null | null | gr-qc | null | The approach to asymptotic electromagnetic fields introduced by Goldberg and
Kerr is used to study various aspects of Lorentz Covariant Gravity. Retarded
multipole moments of the source, the central objects of this study, are
defined, and a sequence of conservation equations for these are derived. These
equations are... | [
{
"created": "Thu, 21 Dec 1995 13:59:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nolan",
"Brien C.",
""
]
] | The approach to asymptotic electromagnetic fields introduced by Goldberg and Kerr is used to study various aspects of Lorentz Covariant Gravity. Retarded multipole moments of the source, the central objects of this study, are defined, and a sequence of conservation equations for these are derived. These equations are u... |
gr-qc/0404063 | Silke Weinfurtner | Silke E. Ch. Weinfurtner | Analog model for an expanding universe | Presented at the 4th Australasian conference on General Relativity
and Cosmology, Monash U, Melbourne, 7-9 January 2004 | Gen.Rel.Grav.37:1549-1554,2005 | 10.1007/s10714-005-0135-7 | null | gr-qc | null | Over the last few years numerous papers concerning analog models for gravity
have been published. It was shown that the dynamical equation of several
systems (e.g. Bose-Einstein condensates with a sink or a vortex) have the same
wave equation as light in a curved-space (e.g. black holes). In the last few
months sever... | [
{
"created": "Wed, 14 Apr 2004 00:26:42 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Weinfurtner",
"Silke E. Ch.",
""
]
] | Over the last few years numerous papers concerning analog models for gravity have been published. It was shown that the dynamical equation of several systems (e.g. Bose-Einstein condensates with a sink or a vortex) have the same wave equation as light in a curved-space (e.g. black holes). In the last few months several... |
gr-qc/0606041 | Tsutomu Kobayashi | Tsutomu Kobayashi | On asymptotic behavior of anisotropic Dvali-Gabadadze-Porrati branes | 5 pages, 1 figure, accepted for publication in Class. Quantum Grav | Class.Quant.Grav.23:4847-4851,2006 | 10.1088/0264-9381/23/15/005 | null | gr-qc astro-ph hep-th | null | The braneworld model of Dvali-Gabadadze-Porrati (DGP) provides an interesting
alternative to a positive cosmological constant by modifying gravity at large
distances. We investigate the asymptotic behavior of homogeneous and
anisotropic cosmologies on the DGP brane. It is shown that all Bianchi models
except type IX ... | [
{
"created": "Fri, 9 Jun 2006 13:20:44 GMT",
"version": "v1"
}
] | 2010-11-05 | [
[
"Kobayashi",
"Tsutomu",
""
]
] | The braneworld model of Dvali-Gabadadze-Porrati (DGP) provides an interesting alternative to a positive cosmological constant by modifying gravity at large distances. We investigate the asymptotic behavior of homogeneous and anisotropic cosmologies on the DGP brane. It is shown that all Bianchi models except type IX is... |
2012.11829 | Nicol\`o Burzill\`a | Nicol\`o Burzill\`a, Breno L. Giacchini, Tib\'erio de Paula Netto,
Leonardo Modesto | Higher-order regularity in local and nonlocal quantum gravity | 17 pages, 2 figures. V2: extended discussion, references added;
matches the published version. V3: misprint corrected | Eur. Phys. J. C, 81 (2021) 462 | 10.1140/epjc/s10052-021-09238-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we investigate the Newtonian limit of higher-derivative
gravity theories with more than four derivatives in the action, including the
non-analytic logarithmic terms resulting from one-loop quantum corrections. The
first part of the paper deals with the occurrence of curvature singularities of
the ... | [
{
"created": "Tue, 22 Dec 2020 04:56:51 GMT",
"version": "v1"
},
{
"created": "Fri, 28 May 2021 13:57:35 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Jun 2021 12:58:45 GMT",
"version": "v3"
}
] | 2021-06-02 | [
[
"Burzillà",
"Nicolò",
""
],
[
"Giacchini",
"Breno L.",
""
],
[
"Netto",
"Tibério de Paula",
""
],
[
"Modesto",
"Leonardo",
""
]
] | In the present work we investigate the Newtonian limit of higher-derivative gravity theories with more than four derivatives in the action, including the non-analytic logarithmic terms resulting from one-loop quantum corrections. The first part of the paper deals with the occurrence of curvature singularities of the me... |
0806.0642 | Neven Bilic | Neven Bilic | Thermodynamics of k-essence | 17 pages, minor changes, typos corrected, a comment on causality and
speed of sound added, references added | Phys.Rev.D78:105012,2008 | 10.1103/PhysRevD.78.105012 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss thermodynamic properties of dark energy using the formalism of
field theory at finite temperature. In particular, we apply our formalism to a
purely kinetic type of k-essence. We show quite generally that the entropy
associated with dark-energy is always equal or greater than zero. Hence,
contrary to often... | [
{
"created": "Tue, 3 Jun 2008 21:59:26 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Nov 2008 15:26:52 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Bilic",
"Neven",
""
]
] | We discuss thermodynamic properties of dark energy using the formalism of field theory at finite temperature. In particular, we apply our formalism to a purely kinetic type of k-essence. We show quite generally that the entropy associated with dark-energy is always equal or greater than zero. Hence, contrary to often s... |
2401.14967 | Sam Dolan Dr | Sam R. Dolan, Marco A. A. de Paula, Luiz C. S. Leite and Lu\'is C. B.
Crispino | Superradiant instability of a charged regular black hole | 13 pages, 13 figures. Version accepted by PRD | Phys. Rev. D 109, 124037 (2024) | 10.1103/PhysRevD.109.124037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a charged, massive scalar field in the vicinity of an
electrically-charged Ay\'on-Beato-Garc\'ia (ABG) regular black hole has a
spectrum of quasibound states that (in a certain parameter regime) grow
exponentially with time, due to black hole superradiance. Superradiant
quasibound states are made possibl... | [
{
"created": "Fri, 26 Jan 2024 16:01:06 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2024 14:19:39 GMT",
"version": "v2"
}
] | 2024-06-17 | [
[
"Dolan",
"Sam R.",
""
],
[
"de Paula",
"Marco A. A.",
""
],
[
"Leite",
"Luiz C. S.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We show that a charged, massive scalar field in the vicinity of an electrically-charged Ay\'on-Beato-Garc\'ia (ABG) regular black hole has a spectrum of quasibound states that (in a certain parameter regime) grow exponentially with time, due to black hole superradiance. Superradiant quasibound states are made possible ... |
2008.02286 | Chandrima Ganguly | Chandrima Ganguly | Cosmic no-hair theorems for viscous contracting Universes | 9 pages | null | 10.1088/1475-7516/2021/07/013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmic no-hair theorem for all initially contracting, spatially
homogeneous, orthogonal Bianchi Cosmologies is derived - which shows that all
such Universes asymptote to a spatially flat, isotropic Universe with the
inclusion of a shear viscous stress. This establishes a new mechanism of
isotropisation in a contrac... | [
{
"created": "Wed, 5 Aug 2020 18:00:08 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Dec 2020 11:07:56 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Ganguly",
"Chandrima",
""
]
] | A cosmic no-hair theorem for all initially contracting, spatially homogeneous, orthogonal Bianchi Cosmologies is derived - which shows that all such Universes asymptote to a spatially flat, isotropic Universe with the inclusion of a shear viscous stress. This establishes a new mechanism of isotropisation in a contracti... |
1207.4035 | Joachim Frieben | Joachim Frieben, Luciano Rezzolla | Equilibrium models of relativistic stars with a toroidal magnetic field | Published version with additional correction of remaining typos | Mon. Not. R. Astron. Soc. 427, 3406-3426 (2012) | 10.1111/j.1365-2966.2012.22027.x | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have computed models of rotating relativistic stars with a toroidal
magnetic field and investigated the combined effects of magnetic field and
rotation on the apparent shape (i.e. the surface deformation), which could be
relevant for the electromagnetic emission, and on the internal matter
distribution (i.e. the q... | [
{
"created": "Tue, 17 Jul 2012 15:42:13 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Feb 2014 19:15:10 GMT",
"version": "v2"
}
] | 2014-02-14 | [
[
"Frieben",
"Joachim",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We have computed models of rotating relativistic stars with a toroidal magnetic field and investigated the combined effects of magnetic field and rotation on the apparent shape (i.e. the surface deformation), which could be relevant for the electromagnetic emission, and on the internal matter distribution (i.e. the qua... |
1908.09854 | Jose Natario | Jose Natario, Rodrigo Vicente | Test fields cannot destroy extremal de Sitter black holes | 13 pages, 3 figures | Gen. Rel. Grav. 52 (2020) 5 | 10.1007/s10714-020-2658-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the timelike Killing vector field that gives the correct
definition of energy for test fields propagating in a Kerr-Newman-de Sitter
spacetime, and use this result to prove that test fields cannot destroy
extremal Kerr-Newman-de Sitter black holes.
| [
{
"created": "Mon, 26 Aug 2019 18:00:10 GMT",
"version": "v1"
}
] | 2020-09-08 | [
[
"Natario",
"Jose",
""
],
[
"Vicente",
"Rodrigo",
""
]
] | We determine the timelike Killing vector field that gives the correct definition of energy for test fields propagating in a Kerr-Newman-de Sitter spacetime, and use this result to prove that test fields cannot destroy extremal Kerr-Newman-de Sitter black holes. |
2011.01309 | Keefe Mitman | Keefe Mitman, Dante A. B. Iozzo, Neev Khera, Michael Boyle, Tommaso De
Lorenzo, Nils Deppe, Lawrence E. Kidder, Jordan Moxon, Harald P. Pfeiffer,
Mark A. Scheel, Saul A. Teukolsky, and William Throwe | Adding Gravitational Memory to Waveform Catalogs using BMS Balance Laws | 13 pages, 9 figures; Corrected a bug affecting the mismatch plot in
Figure 7 | Phys. Rev. D 103, 024031 (2021) | 10.1103/PhysRevD.103.024031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accurate models of gravitational waves from merging binary black holes are
crucial for detectors to measure events and extract new science. One important
feature that is currently missing from the Simulating eXtreme Spacetimes (SXS)
Collaboration's catalog of waveforms for merging black holes, and other
waveform cata... | [
{
"created": "Mon, 2 Nov 2020 20:55:00 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jan 2021 16:10:56 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jan 2021 18:28:39 GMT",
"version": "v3"
}
] | 2021-01-19 | [
[
"Mitman",
"Keefe",
""
],
[
"Iozzo",
"Dante A. B.",
""
],
[
"Khera",
"Neev",
""
],
[
"Boyle",
"Michael",
""
],
[
"De Lorenzo",
"Tommaso",
""
],
[
"Deppe",
"Nils",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[... | Accurate models of gravitational waves from merging binary black holes are crucial for detectors to measure events and extract new science. One important feature that is currently missing from the Simulating eXtreme Spacetimes (SXS) Collaboration's catalog of waveforms for merging black holes, and other waveform catalo... |
2306.09362 | Zhonghua Li | Zhonghua Li | Note on the Corrected Hawking Temperature of a Parametric Deformed Black
Hole with Influence of Quantum Gravity | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, using Hamilton-Jacobi method, we discuss the tunnelling of
fermions when the dual influence of quantum gravity and the deformation of a
parameterized black hole is taken into account. With the influence of the
generalized uncertainty principle, there exists an offset around the standard
Hawking tempera... | [
{
"created": "Tue, 13 Jun 2023 23:52:47 GMT",
"version": "v1"
}
] | 2023-06-19 | [
[
"Li",
"Zhonghua",
""
]
] | In this paper, using Hamilton-Jacobi method, we discuss the tunnelling of fermions when the dual influence of quantum gravity and the deformation of a parameterized black hole is taken into account. With the influence of the generalized uncertainty principle, there exists an offset around the standard Hawking temperatu... |
1707.02970 | Ernesto F. Eiroa | Javier Bad\'ia, Ernesto F. Eiroa | Gravitational lensing by a Horndeski black hole | 12 pages, 4 figures; v2: improved version, new references added | Eur. Phys. J. C (2017) 77:779 | 10.1140/epjc/s10052-017-5376-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we study gravitational lensing by non-rotating and
asymptotically flat black holes in Horndeski theory. By adopting the strong
deflection limit, we calculate the deflection angle, from which we obtain the
positions and the magnifications of the relativistic images. We compare our
results with those co... | [
{
"created": "Mon, 10 Jul 2017 17:56:00 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Nov 2017 18:02:56 GMT",
"version": "v2"
}
] | 2017-11-27 | [
[
"Badía",
"Javier",
""
],
[
"Eiroa",
"Ernesto F.",
""
]
] | In this article we study gravitational lensing by non-rotating and asymptotically flat black holes in Horndeski theory. By adopting the strong deflection limit, we calculate the deflection angle, from which we obtain the positions and the magnifications of the relativistic images. We compare our results with those corr... |
gr-qc/0011041 | Elena Cuoco | E. Cuoco, G. Calamai, L. Fabbroni, G. Losurdo, M. Mazzoni, R. Stanga,
F. Vetrano | On line power spectra identification and whitening for the noise in
interferometric gravitational wave detectors | 28 pages, 21 figures, uses iopart.cls accepted for pubblication on
Classical and Quantum Gravity | Class.Quant.Grav. 18 (2001) 1727-1752 | 10.1088/0264-9381/18/9/309 | null | gr-qc | null | In this paper we address both to the problem of identifying the noise Power
Spectral Density of interferometric detectors by parametric techniques and to
the problem of the whitening procedure of the sequence of data. We will
concentrate the study on a Power Spectral Density like the one of the
Italian-French detecto... | [
{
"created": "Mon, 13 Nov 2000 12:23:25 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2000 14:00:45 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Apr 2001 11:00:39 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Cuoco",
"E.",
""
],
[
"Calamai",
"G.",
""
],
[
"Fabbroni",
"L.",
""
],
[
"Losurdo",
"G.",
""
],
[
"Mazzoni",
"M.",
""
],
[
"Stanga",
"R.",
""
],
[
"Vetrano",
"F.",
""
]
] | In this paper we address both to the problem of identifying the noise Power Spectral Density of interferometric detectors by parametric techniques and to the problem of the whitening procedure of the sequence of data. We will concentrate the study on a Power Spectral Density like the one of the Italian-French detector ... |
2103.08409 | Etera R. Livine | Qian Chen and Etera R. Livine | Loop Quantum Gravity's Boundary Maps | 23 pages | null | 10.1088/1361-6382/ac103f | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In canonical quantum gravity, the presence of spatial boundaries naturally
leads to a boundary quantum states, representing quantum boundary conditions
for the bulk fields. As a consequence, quantum states of the bulk geometry
needs to be upgraded to wave-functions valued in the boundary Hilbert space:
the bulk becom... | [
{
"created": "Mon, 15 Mar 2021 14:35:22 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Chen",
"Qian",
""
],
[
"Livine",
"Etera R.",
""
]
] | In canonical quantum gravity, the presence of spatial boundaries naturally leads to a boundary quantum states, representing quantum boundary conditions for the bulk fields. As a consequence, quantum states of the bulk geometry needs to be upgraded to wave-functions valued in the boundary Hilbert space: the bulk become ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.