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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2108.11642 | Brett Bochner | Brett Bochner | Electromagnetic wave propagation in general Kasner-like metrics | 32 pages, 1 figure; Further developments of research presented at the
22nd International Conference on General Relativity and Gravitation | Int. J. Mod. Phys. D (IJMPD) Vol. 31, No. 13, 2230016 (2022) | 10.1142/S0218271822300166 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The curved spacetime Maxwell equations are applied to the anisotropically
expanding Kasner metrics. Using the application of vector identities we derive
2$^\textrm{nd}$-order differential wave equations for the electromagnetic field
components; through this explicit derivation, we find that the
2$^\textrm{nd}$-order ... | [
{
"created": "Thu, 26 Aug 2021 08:15:35 GMT",
"version": "v1"
}
] | 2022-11-08 | [
[
"Bochner",
"Brett",
""
]
] | The curved spacetime Maxwell equations are applied to the anisotropically expanding Kasner metrics. Using the application of vector identities we derive 2$^\textrm{nd}$-order differential wave equations for the electromagnetic field components; through this explicit derivation, we find that the 2$^\textrm{nd}$-order wa... |
1907.11080 | Andrea Geralico | Donato Bini, Andrea Geralico | New gravitational self-force analytical results for eccentric equatorial
orbits around a Kerr black hole: redshift invariant | 15 pages, revtex macros | Phys. Rev. D 100, 104002 (2019) | 10.1103/PhysRevD.100.104002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Detweiler-Barack-Sago redshift function for particles moving along
slightly eccentric equatorial orbits around a Kerr black hole is currently
known up to the second order in eccentricity, second order in spin parameter,
and the 8.5 post-Newtonian order. We improve the analytical computation of such
a gauge-invari... | [
{
"created": "Tue, 23 Jul 2019 20:28:40 GMT",
"version": "v1"
}
] | 2019-11-13 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | The Detweiler-Barack-Sago redshift function for particles moving along slightly eccentric equatorial orbits around a Kerr black hole is currently known up to the second order in eccentricity, second order in spin parameter, and the 8.5 post-Newtonian order. We improve the analytical computation of such a gauge-invarian... |
2307.09632 | Mitja Fridman | Saurya Das, Mitja Fridman, Gaetano Lambiase | General Formalism of the Quantum Equivalence Principle | 14 pages | Commun. Phys. 6, 198 (2023) | 10.1038/s42005-023-01306-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A consistent theory of quantum gravity will require a fully quantum
formulation of the classical equivalence principle. Such a formulation has been
recently proposed in terms of the equality of the rest, inertial and
gravitational mass operators, and for non-relativistic particles in a weak
gravitational field. In th... | [
{
"created": "Tue, 18 Jul 2023 20:53:10 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Aug 2023 21:26:15 GMT",
"version": "v2"
}
] | 2023-08-03 | [
[
"Das",
"Saurya",
""
],
[
"Fridman",
"Mitja",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | A consistent theory of quantum gravity will require a fully quantum formulation of the classical equivalence principle. Such a formulation has been recently proposed in terms of the equality of the rest, inertial and gravitational mass operators, and for non-relativistic particles in a weak gravitational field. In this... |
2402.18882 | Anirban Chatterjee | Anirban Chatterjee, Abhijit Bandyopadhyay and Debasish Majumdar | Exploring the evolution of structure growth in the universe with
field-fluid interactions through dynamical stability analysis | 23 pages, 2 tables and 6 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate an interacting quintessence dark energy - dark matter scenario
and its impact on structure formation by analyzing the evolution of scalar
perturbations. The interaction is introduced by incorporating a non-zero source
term into the continuity equations of the two sectors (with opposite signs),
modeled ... | [
{
"created": "Thu, 29 Feb 2024 05:59:55 GMT",
"version": "v1"
}
] | 2024-03-01 | [
[
"Chatterjee",
"Anirban",
""
],
[
"Bandyopadhyay",
"Abhijit",
""
],
[
"Majumdar",
"Debasish",
""
]
] | We investigate an interacting quintessence dark energy - dark matter scenario and its impact on structure formation by analyzing the evolution of scalar perturbations. The interaction is introduced by incorporating a non-zero source term into the continuity equations of the two sectors (with opposite signs), modeled as... |
2103.01816 | Karim Van Aelst | Karim Van Aelst | Note on equatorial geodesics in circular spacetimes | 18 pages, 5 figures, version published in CQG | Class. Quantum Grav. 37 207001 (2020) | 10.1088/1361-6382/aba80c | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | General results on equatorial geodesics are exposed in the case of circular
spacetimes featuring an equatorial reflection symmetry. The way the geodesic
equation equivalently rewrites in terms of an effective potential is explicitly
recalled for circular and non-circular equatorial geodesics. This provides a
practica... | [
{
"created": "Tue, 2 Mar 2021 15:46:14 GMT",
"version": "v1"
}
] | 2021-03-03 | [
[
"Van Aelst",
"Karim",
""
]
] | General results on equatorial geodesics are exposed in the case of circular spacetimes featuring an equatorial reflection symmetry. The way the geodesic equation equivalently rewrites in terms of an effective potential is explicitly recalled for circular and non-circular equatorial geodesics. This provides a practical ... |
2212.11648 | Maria Shubina | Maria Shubina | Exact analytical vacuum solutions of $ R^n $-gravity model depending on
two variables | 19 pages, 8 figures | null | 10.1016/j.aop.2023.169245 | null | gr-qc math-ph math.MP nlin.SI | http://creativecommons.org/licenses/by/4.0/ | In this paper we consider the metric power-law $f(R)\sim R^n $-gravity model
for the four-dimensional metric tensor depending on two coordinates. We obtain
exact analytical vacuum solutions for different values of $ n $. These
solutions contain both non-stationary configurations of the travelling wave
type and statio... | [
{
"created": "Thu, 22 Dec 2022 12:32:47 GMT",
"version": "v1"
}
] | 2023-03-22 | [
[
"Shubina",
"Maria",
""
]
] | In this paper we consider the metric power-law $f(R)\sim R^n $-gravity model for the four-dimensional metric tensor depending on two coordinates. We obtain exact analytical vacuum solutions for different values of $ n $. These solutions contain both non-stationary configurations of the travelling wave type and stationa... |
1502.06257 | Junbin Li | Junbin Li, Xi-Ping Zhu | Local existence in retarded time under a weak decay on complete null
cones | 30 pages. arXiv admin note: text overlap with arXiv:1406.0048 | null | 10.1007/s11425-015-5056-7 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the previous paper \cite{L-Z}, for a characteristic problem with not
necessarily small initial data given on a complete null cone decaying like that
in the work \cite{Ch-K} of the stability of Minkowski spacetime by
Christodoulou and Klainerman, we proved the local existence in retarded time,
which means the solut... | [
{
"created": "Sun, 22 Feb 2015 18:31:48 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Li",
"Junbin",
""
],
[
"Zhu",
"Xi-Ping",
""
]
] | In the previous paper \cite{L-Z}, for a characteristic problem with not necessarily small initial data given on a complete null cone decaying like that in the work \cite{Ch-K} of the stability of Minkowski spacetime by Christodoulou and Klainerman, we proved the local existence in retarded time, which means the solutio... |
2107.08876 | Eleanor Hamilton | Eleanor Hamilton, Lionel London, Jonathan E. Thompson, Edward
Fauchon-Jones, Mark Hannam, Chinmay Kalaghatgi, Sebastian Khan, Francesco
Pannarale and Alex Vano-Vinuales | The final twist: A model of gravitational waves from precessing
black-hole binaries through merger and ringdown | 40 pages, 28 figures | null | 10.1103/PhysRevD.104.124027 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present PhenomPNR, a frequency-domain phenomenological model of the
gravitational-wave (GW) signal from binary-black-hole mergers that is tuned to
numerical relativity (NR) simulations of precessing binaries. In many current
waveform models, e.g., the "Phenom" and "EOBNR" families that have been used
extensively t... | [
{
"created": "Mon, 19 Jul 2021 13:48:09 GMT",
"version": "v1"
}
] | 2021-12-22 | [
[
"Hamilton",
"Eleanor",
""
],
[
"London",
"Lionel",
""
],
[
"Thompson",
"Jonathan E.",
""
],
[
"Fauchon-Jones",
"Edward",
""
],
[
"Hannam",
"Mark",
""
],
[
"Kalaghatgi",
"Chinmay",
""
],
[
"Khan",
"Sebastian",
... | We present PhenomPNR, a frequency-domain phenomenological model of the gravitational-wave (GW) signal from binary-black-hole mergers that is tuned to numerical relativity (NR) simulations of precessing binaries. In many current waveform models, e.g., the "Phenom" and "EOBNR" families that have been used extensively to ... |
2408.07036 | Karol Urba\'nski | Karol Urba\'nski | Visual relativistic mechanics | 8 pages, 9 figures | null | null | null | gr-qc physics.class-ph physics.ed-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many formalisms of special relativity are shown in various textbooks.
However, even in those where the underlying geometry of Minkowski space is
emphasized, the visualisations are lacking. This article aims to remedy this by
expressing relativistic concepts in a visual manner, using the full power of
hyperbolic trigo... | [
{
"created": "Tue, 13 Aug 2024 17:02:20 GMT",
"version": "v1"
}
] | 2024-08-14 | [
[
"Urbański",
"Karol",
""
]
] | Many formalisms of special relativity are shown in various textbooks. However, even in those where the underlying geometry of Minkowski space is emphasized, the visualisations are lacking. This article aims to remedy this by expressing relativistic concepts in a visual manner, using the full power of hyperbolic trigono... |
1710.06789 | Shinji Tsujikawa | Sachiko Kuroyanagi, Chunshan Lin, Misao Sasaki, Shinji Tsujikawa | Observational signatures of the parametric amplification of
gravitational waves during reheating after inflation | 17 pages, 8 figures | Phys. Rev. D 97, 023516 (2018) | 10.1103/PhysRevD.97.023516 | YITP-17-99 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of Gravitational Waves (GWs) during and after
inflation as well as the resulting observational consequences in a
Lorentz-violating massive gravity theory with one scalar (inflaton) and two
tensor degrees of freedom. We consider two explicit examples of the tensor mass
$m_g$ that depends either ... | [
{
"created": "Wed, 18 Oct 2017 15:37:32 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Jan 2018 00:30:13 GMT",
"version": "v2"
}
] | 2018-01-23 | [
[
"Kuroyanagi",
"Sachiko",
""
],
[
"Lin",
"Chunshan",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | We study the evolution of Gravitational Waves (GWs) during and after inflation as well as the resulting observational consequences in a Lorentz-violating massive gravity theory with one scalar (inflaton) and two tensor degrees of freedom. We consider two explicit examples of the tensor mass $m_g$ that depends either on... |
1908.07504 | Henk Bart | Henk Bart | Quasi-local conserved charges in General Relativity | null | null | null | MPP-2019-179 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general prescription for constructing quasi-local conserved quantities in
General Relativity is proposed. The construction is applied to BMS symmetry
generators in Newman-Unti gauge, so as to define quasi-local BMS charges. It is
argued that the zero mode of this BMS charge is a promising definition of
quasi-local ... | [
{
"created": "Tue, 20 Aug 2019 17:28:35 GMT",
"version": "v1"
}
] | 2019-08-21 | [
[
"Bart",
"Henk",
""
]
] | A general prescription for constructing quasi-local conserved quantities in General Relativity is proposed. The construction is applied to BMS symmetry generators in Newman-Unti gauge, so as to define quasi-local BMS charges. It is argued that the zero mode of this BMS charge is a promising definition of quasi-local en... |
1907.03509 | B. S. Kandemir | B. S. Kandemir | Hairy BTZ black hole and its analogue model in graphene | null | null | 10.1016/j.aop.2019.168064 | null | gr-qc cond-mat.mes-hall | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a novel exact analytical solution to Einstein-Maxwell-scalar
gravity with negative cosmological constant in (2+1)-dimensions. The scalar
field is minimally coupled to gravity and electromagnetism by the metric
ansatz. On the one hand, we first find analytical results for the real part of
quasinormal mode sp... | [
{
"created": "Mon, 8 Jul 2019 11:03:58 GMT",
"version": "v1"
}
] | 2020-01-29 | [
[
"Kandemir",
"B. S.",
""
]
] | We obtain a novel exact analytical solution to Einstein-Maxwell-scalar gravity with negative cosmological constant in (2+1)-dimensions. The scalar field is minimally coupled to gravity and electromagnetism by the metric ansatz. On the one hand, we first find analytical results for the real part of quasinormal mode spec... |
gr-qc/9312026 | James E. Lidsey | James E. Lidsey | Solutions to the Wheeler-Dewitt Equation Inspired by the String
Effective Action | 21 pages of plain LaTeX, Fermilab-Pub-93/100-A | Class.Quant.Grav.11:1211-1224,1994 | 10.1088/0264-9381/11/5/009 | null | gr-qc | null | The Wheeler-DeWitt equation is derived from the bosonic sector of the
heterotic string effective action assuming a toroidal compactification. The
spatially closed, higher dimensional Friedmann-Robertson-Walker (FRW) cosmology
is investigated and a suitable change of variables rewrites the equation in a
canonical form... | [
{
"created": "Thu, 16 Dec 1993 16:03:10 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Lidsey",
"James E.",
""
]
] | The Wheeler-DeWitt equation is derived from the bosonic sector of the heterotic string effective action assuming a toroidal compactification. The spatially closed, higher dimensional Friedmann-Robertson-Walker (FRW) cosmology is investigated and a suitable change of variables rewrites the equation in a canonical form. ... |
1501.02187 | Arturo Stabile | A. Stabile, S. Capozziello | Post-Minkowskian Limit and Gravitational Waves solutions of Fourth Order
Gravity: a complete study | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The post-Minkowskian limit and gravitational wave solutions for general
fourth-order gravity theories are discussed. Specifically, we consider a
Lagrangian with a generic function of curvature invariants $f(R,
R_{\alpha\beta}R^{\alpha\beta},
R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$. It is well known t... | [
{
"created": "Fri, 9 Jan 2015 16:02:19 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Apr 2015 22:24:41 GMT",
"version": "v2"
}
] | 2015-04-28 | [
[
"Stabile",
"A.",
""
],
[
"Capozziello",
"S.",
""
]
] | The post-Minkowskian limit and gravitational wave solutions for general fourth-order gravity theories are discussed. Specifically, we consider a Lagrangian with a generic function of curvature invariants $f(R, R_{\alpha\beta}R^{\alpha\beta}, R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$. It is well known tha... |
2203.13252 | Meng-Xiang Lin | Jose Maria Ezquiaga, Wayne Hu, Macarena Lagos, Meng-Xiang Lin, Fei Xu | Modified gravitational wave propagation with higher modes and its
degeneracies with lensing | 32 pages, 6 figures. Match the published version | Journal of Cosmology and Astroparticle Physics, Volume 2022, Issue
08, id.016, 33 pp | 10.1088/1475-7516/2022/08/016 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Low-energy alternatives to General Relativity (GR) generically modify the
phase of gravitational waves (GWs) during their propagation. As detector
sensitivities increase, it becomes key to understand how these modifications
affect the GW higher modes and to disentangle possible degeneracies with
astrophysical phenome... | [
{
"created": "Thu, 24 Mar 2022 17:59:05 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Aug 2022 22:56:13 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Ezquiaga",
"Jose Maria",
""
],
[
"Hu",
"Wayne",
""
],
[
"Lagos",
"Macarena",
""
],
[
"Lin",
"Meng-Xiang",
""
],
[
"Xu",
"Fei",
""
]
] | Low-energy alternatives to General Relativity (GR) generically modify the phase of gravitational waves (GWs) during their propagation. As detector sensitivities increase, it becomes key to understand how these modifications affect the GW higher modes and to disentangle possible degeneracies with astrophysical phenomena... |
2308.16791 | Sam E. Brady | Sam E. Brady, Llibert Arest\'e Sal\'o, Katy Clough, Pau Figueras,
Annamalai P. S | Solving the initial conditions problem for modified gravity theories | 9 pages, 4 figures, comments welcome! | null | 10.1103/PhysRevD.108.104022 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Modified gravity theories such as Einstein scalar Gauss Bonnet (EsGB) contain
higher derivative terms in the spacetime curvature in their action, which
results in modifications to the Hamiltonian and momentum constraints of the
theory. In principle, such modifications may affect the principal part of the
operator in ... | [
{
"created": "Thu, 31 Aug 2023 15:08:09 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2023 10:17:40 GMT",
"version": "v2"
}
] | 2023-12-01 | [
[
"Brady",
"Sam E.",
""
],
[
"Saló",
"Llibert Aresté",
""
],
[
"Clough",
"Katy",
""
],
[
"Figueras",
"Pau",
""
],
[
"S",
"Annamalai P.",
""
]
] | Modified gravity theories such as Einstein scalar Gauss Bonnet (EsGB) contain higher derivative terms in the spacetime curvature in their action, which results in modifications to the Hamiltonian and momentum constraints of the theory. In principle, such modifications may affect the principal part of the operator in th... |
gr-qc/0404091 | T. Roy Choudhury | T. Roy Choudhury, T. Padmanabhan | Concept of temperature in multi-horizon spacetimes: Analysis of
Schwarzschild-De Sitter metric | 12 pages | Gen.Rel.Grav.39:1789-1811,2007 | 10.1007/s10714-007-0489-0 | null | gr-qc astro-ph hep-th | null | In case of spacetimes with single horizon, there exist several
well-established procedures for relating the surface gravity of the horizon to
a thermodynamic temperature. Such procedures, however, cannot be extended in a
straightforward manner when a spacetime has multiple horizons. In particular,
it is not clear whe... | [
{
"created": "Wed, 21 Apr 2004 14:36:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Choudhury",
"T. Roy",
""
],
[
"Padmanabhan",
"T.",
""
]
] | In case of spacetimes with single horizon, there exist several well-established procedures for relating the surface gravity of the horizon to a thermodynamic temperature. Such procedures, however, cannot be extended in a straightforward manner when a spacetime has multiple horizons. In particular, it is not clear wheth... |
gr-qc/9911028 | Mauricio Bellini | Mauricio Bellini (Departamento de Fisica - Universidad Nacional de Mar
del Plata) | Gauge - invariant fluctuations of the metric in stochastic inflation | 4 pages, no figures, version accepted for publication in Physical
Review D (as Brief Report) | null | 10.1103/PhysRevD.61.107301 | null | gr-qc | null | I derive the stochastic equation for the perturbations of the metric for a
gauge - invariant energy - momemtum - tensor (EMT) in stochastic inflation. A
quantization for the field that describes the gauge - invariant perturbations
for the metric is developed. In a power - law expansion for the universe the
amplitude ... | [
{
"created": "Mon, 8 Nov 1999 21:57:53 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jan 2000 21:54:34 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Bellini",
"Mauricio",
"",
"Departamento de Fisica - Universidad Nacional de Mar\n del Plata"
]
] | I derive the stochastic equation for the perturbations of the metric for a gauge - invariant energy - momemtum - tensor (EMT) in stochastic inflation. A quantization for the field that describes the gauge - invariant perturbations for the metric is developed. In a power - law expansion for the universe the amplitude fo... |
gr-qc/0401014 | Jose Luis Rosales | J.L. Rosales | The Pioneer's Anomalous Doppler Drift as a Berry Phase | 7 pages, The references are now correct | null | null | null | gr-qc | null | The detected anomalous frequency drift acceleration in Pioneer's radar data
finds its explanation in a Berry phase that obtains the quantum state of a
photon that propagates within an expanding space-time. The clock acceleration
is just the adiabatic expansion rate and an analogy between the effect and
Foucault's exp... | [
{
"created": "Mon, 5 Jan 2004 11:16:28 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jan 2004 08:07:37 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2004 09:32:15 GMT",
"version": "v3"
},
{
"created": "Thu, 13 May 2004 09:32:16 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Rosales",
"J. L.",
""
]
] | The detected anomalous frequency drift acceleration in Pioneer's radar data finds its explanation in a Berry phase that obtains the quantum state of a photon that propagates within an expanding space-time. The clock acceleration is just the adiabatic expansion rate and an analogy between the effect and Foucault's exper... |
2010.11201 | Sarunas Verner | Sarunas Verner | Quintessential Inflation in Palatini Gravity | 27 pages, 2 figures, 2 tables; v2: minor revision, references added,
matches the published version | null | 10.1088/1475-7516/2021/04/001 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a model of quintessential inflation in the context of Palatini
gravity. As a representative example, we consider the Peebles-Vilenkin model of
quintessential inflation with a small non-minimal coupling to gravity, which is
consistent with the most recent Planck measurements. At the end of inflation,
the infl... | [
{
"created": "Wed, 21 Oct 2020 18:00:03 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Apr 2021 17:56:33 GMT",
"version": "v2"
}
] | 2021-07-19 | [
[
"Verner",
"Sarunas",
""
]
] | We study a model of quintessential inflation in the context of Palatini gravity. As a representative example, we consider the Peebles-Vilenkin model of quintessential inflation with a small non-minimal coupling to gravity, which is consistent with the most recent Planck measurements. At the end of inflation, the inflat... |
1909.04347 | Kai Lin | Kai Lin, Yunqi Liu, Wei-Liang Qian, Bin Wang and Elcio Abdalla | On quasinormal modes for the Vaidya metric in asymptotically anti-de
Sitter spacetime | Accepted for publication in Physical Review D | Phys. Rev. D 100, 065018 (2019) | 10.1103/PhysRevD.100.065018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present a numerical scheme to study the quasinormal modes of
the time-dependent Vaidya black hole metric in asymptotically anti-de Sitter
spacetime. The proposed algorithm is primarily based on a generalized matrix
method for quasinormal modes. The main feature of the present approach is that
the qua... | [
{
"created": "Tue, 10 Sep 2019 08:18:33 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Sep 2019 04:05:47 GMT",
"version": "v2"
}
] | 2019-10-02 | [
[
"Lin",
"Kai",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Qian",
"Wei-Liang",
""
],
[
"Wang",
"Bin",
""
],
[
"Abdalla",
"Elcio",
""
]
] | In this work, we present a numerical scheme to study the quasinormal modes of the time-dependent Vaidya black hole metric in asymptotically anti-de Sitter spacetime. The proposed algorithm is primarily based on a generalized matrix method for quasinormal modes. The main feature of the present approach is that the quasi... |
1811.04904 | Alex Nielsen | Alex B. Nielsen, Collin D. Capano, Ofek Birnholtz, Julian Westerweck | Parameter estimation for black hole echo signals and their statistical
significance | 7 pages, 5 figures. Typo fixes and references added in v2 | Phys. Rev. D 99, 104012 (2019) | 10.1103/PhysRevD.99.104012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searching for black hole echo signals with gravitational waves provides a
means of probing the near-horizon regime of these objects. We demonstrate a
pipeline to efficiently search for these signals in gravitational wave data and
calculate model selection probabilities between signal and no-signal
hypotheses. As an e... | [
{
"created": "Mon, 12 Nov 2018 18:44:05 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Nov 2018 18:40:36 GMT",
"version": "v2"
}
] | 2019-05-15 | [
[
"Nielsen",
"Alex B.",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Birnholtz",
"Ofek",
""
],
[
"Westerweck",
"Julian",
""
]
] | Searching for black hole echo signals with gravitational waves provides a means of probing the near-horizon regime of these objects. We demonstrate a pipeline to efficiently search for these signals in gravitational wave data and calculate model selection probabilities between signal and no-signal hypotheses. As an exa... |
2309.06498 | Benjamin Wade | David A. Nichols, Benjamin A. Wade, Alexander M. Grant | Secondary accretion of dark matter in intermediate mass-ratio inspirals:
Dark-matter dynamics and gravitational-wave phase | 24 pages, 6 figures; v2: fixed typos, matches version published in
PRD | Phys. Rev. D 108, 124062 (2023) | 10.1103/PhysRevD.108.124062 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When particle dark matter is bound gravitationally around a massive black
hole in sufficiently high densities, the dark matter will affect the rate of
inspiral of a secondary compact object that forms a binary with the massive
black hole. In this paper, we revisit previous estimates of the impact of
dark-matter accre... | [
{
"created": "Tue, 12 Sep 2023 18:11:21 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2024 21:40:05 GMT",
"version": "v2"
}
] | 2024-01-09 | [
[
"Nichols",
"David A.",
""
],
[
"Wade",
"Benjamin A.",
""
],
[
"Grant",
"Alexander M.",
""
]
] | When particle dark matter is bound gravitationally around a massive black hole in sufficiently high densities, the dark matter will affect the rate of inspiral of a secondary compact object that forms a binary with the massive black hole. In this paper, we revisit previous estimates of the impact of dark-matter accreti... |
1303.0215 | Jiri Podolsky | Jiri Podolsky, Robert Svarc | Explicit algebraic classification of Kundt geometries in any dimension | 26 pages, no figures. Presentation improved. To appear in Classical
and Quantum Gravity | Class.Quant.Grav.30:125007,2013 | 10.1088/0264-9381/30/12/125007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an algebraic classification, based on the null alignment
properties of the Weyl tensor, of the general Kundt class of spacetimes in
arbitrary dimension for which the non-expanding, non-twisting, shear-free null
direction \boldk is a (multiple) Weyl aligned null direction (WAND). No field
equations are used... | [
{
"created": "Fri, 1 Mar 2013 16:38:16 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2013 14:17:24 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jun 2013 15:27:30 GMT",
"version": "v3"
}
] | 2013-06-19 | [
[
"Podolsky",
"Jiri",
""
],
[
"Svarc",
"Robert",
""
]
] | We present an algebraic classification, based on the null alignment properties of the Weyl tensor, of the general Kundt class of spacetimes in arbitrary dimension for which the non-expanding, non-twisting, shear-free null direction \boldk is a (multiple) Weyl aligned null direction (WAND). No field equations are used, ... |
gr-qc/0405049 | Rituparno Goswami | Rituparno Goswami, Pankaj S Joshi | Cosmic Censorship in Higher Dimensions | 4 Pages, Revtex4, 1 figure | Phys.Rev. D69 (2004) 104002 | 10.1103/PhysRevD.69.104002 | null | gr-qc hep-th | null | We show that the naked singularities arising in dust collapse from smooth
initial data (which include those discovered by Eardley and Smarr,
Christodoulou, and Newman) are removed when we make transition to higher
dimensional spacetimes. The cosmic censorship is then restored for dust
collapse which will always produ... | [
{
"created": "Mon, 10 May 2004 13:24:50 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Goswami",
"Rituparno",
""
],
[
"Joshi",
"Pankaj S",
""
]
] | We show that the naked singularities arising in dust collapse from smooth initial data (which include those discovered by Eardley and Smarr, Christodoulou, and Newman) are removed when we make transition to higher dimensional spacetimes. The cosmic censorship is then restored for dust collapse which will always produce... |
gr-qc/0511081 | Andrew Beckwith | A.W.Beckwith | How soliton-anti soliton di quark pairs signify an Einstein constant
dominated cosmology, and lead to new inflationary cosmology physics | 45 pages, 3 figures, very expanded version of material in accepted
PANIC 2005 talk at Santa Fe, NM, which will in abbreviated form be in AIP
published proceedings for PANIC 2005 | Electron.J.Theor.Phys. 9 (2006) 7-33 | null | null | gr-qc | null | We review the results of a model of how nucleation of a new universe occurs,
assuming a di quark identification for soliton-anti soliton constituent parts
of a scalar field. Initially, we employ a false vacuum potential system;
however ,when cosmological expansion is dominated by the Einstein cosmological
constant at... | [
{
"created": "Tue, 15 Nov 2005 19:39:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Beckwith",
"A. W.",
""
]
] | We review the results of a model of how nucleation of a new universe occurs, assuming a di quark identification for soliton-anti soliton constituent parts of a scalar field. Initially, we employ a false vacuum potential system; however ,when cosmological expansion is dominated by the Einstein cosmological constant at t... |
gr-qc/0609060 | Sean Robinson | Sean P. Robinson | Normalization conventions for Newton's constant and the Planck scale in
arbitrary spacetime dimension | 4 pages, 2 figures, RevTeX4 | null | null | null | gr-qc | null | We calculate, in d spacetime dimensions, the relationship between the
coefficient 1/K^2 of the Einstein-Hilbert term in the action of general
relativity and the coefficient G_N of the force law that results from the
Newtonian limit of general relativity. The result is
K^2=2[(d-2)/(d-3)]Vol(S^[d-2])G_N, where Vol(S^n)... | [
{
"created": "Sun, 17 Sep 2006 01:09:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Robinson",
"Sean P.",
""
]
] | We calculate, in d spacetime dimensions, the relationship between the coefficient 1/K^2 of the Einstein-Hilbert term in the action of general relativity and the coefficient G_N of the force law that results from the Newtonian limit of general relativity. The result is K^2=2[(d-2)/(d-3)]Vol(S^[d-2])G_N, where Vol(S^n) i... |
2212.01723 | Yan-Gang Miao | Yang Guo, Yan-Gang Miao | On heat properties of charged AdS black holes in Gauss-Bonnet gravity
coupled with nonlinear electrodynamics | v1: 11 pages, 5 figures; v2: 19 pages, 6 figures, clarifications and
references added, final version to appear in Physics Letters B | Phys. Lett. B 840 (2023) 137884 (12 pages) | 10.1016/j.physletb.2023.137884 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the heat properties of charged AdS black holes in the
Gauss-Bonnet gravity coupled with nonlinear electrodynamics. We consider the
thermodynamics of black holes from the perspective of heat capacity and show
that the nonlinear electrodynamics can be helpful to improve the thermodynamic
stability of bla... | [
{
"created": "Sun, 4 Dec 2022 02:19:22 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Apr 2023 10:35:31 GMT",
"version": "v2"
}
] | 2023-04-11 | [
[
"Guo",
"Yang",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We investigate the heat properties of charged AdS black holes in the Gauss-Bonnet gravity coupled with nonlinear electrodynamics. We consider the thermodynamics of black holes from the perspective of heat capacity and show that the nonlinear electrodynamics can be helpful to improve the thermodynamic stability of black... |
1911.00967 | Sven Hirsch | Hubert Bray, Benjamin Hamm, Sven Hirsch, James Wheeler and Yiyue Zhang | Flatly Foliated Relativity | 29 pages, 2 figures | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Flatly Foliated Relativity (FFR) is a new theory which conceptually lies
between Special Relativity (SR) and General Relativity (GR), in which spacetime
is foliated by flat Euclidean spaces. While GR is based on the idea that
"matter curves spacetime", FFR is based on the idea that "matter curves
spacetime, but not s... | [
{
"created": "Sun, 3 Nov 2019 21:09:37 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Nov 2019 03:18:10 GMT",
"version": "v2"
}
] | 2019-11-15 | [
[
"Bray",
"Hubert",
""
],
[
"Hamm",
"Benjamin",
""
],
[
"Hirsch",
"Sven",
""
],
[
"Wheeler",
"James",
""
],
[
"Zhang",
"Yiyue",
""
]
] | Flatly Foliated Relativity (FFR) is a new theory which conceptually lies between Special Relativity (SR) and General Relativity (GR), in which spacetime is foliated by flat Euclidean spaces. While GR is based on the idea that "matter curves spacetime", FFR is based on the idea that "matter curves spacetime, but not spa... |
gr-qc/0504082 | Masaru Shibata | Masaru Shibata | Constraining nuclear equations of state using gravitational waves from
hypermassive neutron stars | 4 pages, to appear in Phys. Rev. Lett | Phys.Rev.Lett. 94 (2005) 201101 | 10.1103/PhysRevLett.94.201101 | null | gr-qc astro-ph | null | Latest general relativistic simulations for merger of binary neutron stars
with realistic equations of state (EOSs) show that a hypermassive neutron star
of an ellipsoidal figure is formed after the merger if the total mass is
smaller than a threshold value which depends on the EOSs. The effective
amplitude of quasip... | [
{
"created": "Tue, 19 Apr 2005 08:18:57 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Shibata",
"Masaru",
""
]
] | Latest general relativistic simulations for merger of binary neutron stars with realistic equations of state (EOSs) show that a hypermassive neutron star of an ellipsoidal figure is formed after the merger if the total mass is smaller than a threshold value which depends on the EOSs. The effective amplitude of quasiper... |
1908.10688 | Pardyumn Kumar Sahoo | P.K. Sahoo, S. Bhattacharjee | Revisiting The Coincidence Problem in $f(R)$ Gravitation | 7 pages, 1 Figures, Published version | New Astronomy, 77 (2020), 101351 | 10.1016/j.newast.2019.101351 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy densities of dark matter (DM) and dark energy (DE) are of the same
order at the present epoch despite the fact that both these quantities have
contrasting characteristics and are presumed to have evolved distinctively with
cosmic evolution. This is a major issue in standard $\Lambda$CDM cosmology and
is te... | [
{
"created": "Mon, 26 Aug 2019 11:09:24 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Sep 2019 10:25:52 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Dec 2019 14:11:56 GMT",
"version": "v3"
}
] | 2020-01-01 | [
[
"Sahoo",
"P. K.",
""
],
[
"Bhattacharjee",
"S.",
""
]
] | The energy densities of dark matter (DM) and dark energy (DE) are of the same order at the present epoch despite the fact that both these quantities have contrasting characteristics and are presumed to have evolved distinctively with cosmic evolution. This is a major issue in standard $\Lambda$CDM cosmology and is term... |
1606.05263 | Abraao Capistrano | Abra\~ao J. S. Capistrano, Joice A. M. Penagos, Manuel S. Al\'arcon | Anomalous precession of planets on a Weyl conformastatic solution | 6 pages, revised version, Accepted for publication in MNRAS | Royal Astronomical Society. Monthly Notices, v. 463, p. 1587-1591,
2016 | 10.1093/mnras/stw1958 | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the anomalous planets precession in the
nearly-newtonian gravitational regime. This limit is obtained from the
application of the slow motion condition to the geodesic equations without
altering the geodesic deviation equations. Using a non-standard expression for
the perihelion advance ... | [
{
"created": "Wed, 15 Jun 2016 01:14:16 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2016 17:07:09 GMT",
"version": "v2"
}
] | 2017-04-06 | [
[
"Capistrano",
"Abraão J. S.",
""
],
[
"Penagos",
"Joice A. M.",
""
],
[
"Alárcon",
"Manuel S.",
""
]
] | In this paper, we investigate the anomalous planets precession in the nearly-newtonian gravitational regime. This limit is obtained from the application of the slow motion condition to the geodesic equations without altering the geodesic deviation equations. Using a non-standard expression for the perihelion advance fr... |
0904.2669 | Carlos A. R. Herdeiro | P.P. Avelino, A.J.S. Hamilton, C.A.R. Herdeiro | Mass Inflation in Brans-Dicke gravity | 14 pages, 15 figures | Phys.Rev.D79:124045,2009 | 10.1103/PhysRevD.79.124045 | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A detailed non-linear analysis of the internal structure of spherical,
charged black holes that are accreting scalar matter is performed in the
framework of the Brans-Dicke theory of gravity. We choose the lowest value of
the Brans-Dicke parameter that is compatible with observational constraints.
First, the homogene... | [
{
"created": "Fri, 17 Apr 2009 10:11:46 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Avelino",
"P. P.",
""
],
[
"Hamilton",
"A. J. S.",
""
],
[
"Herdeiro",
"C. A. R.",
""
]
] | A detailed non-linear analysis of the internal structure of spherical, charged black holes that are accreting scalar matter is performed in the framework of the Brans-Dicke theory of gravity. We choose the lowest value of the Brans-Dicke parameter that is compatible with observational constraints. First, the homogeneou... |
2103.17074 | Lo\"ic Marsot | Lo\"ic Marsot | Geometric studies of the interplay between spin and gravity | PhD thesis, 141 pages, 12 figures | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-nd/4.0/ | This PhD thesis is the conclusion of some of my works carried out at the
Centre de Physique Th\'eorique, under the supervision of Serge Lazzarini. Two
subjects are presented in the manuscript, both aiming at studying the effect of
the spin of elementary particles on otherwise known theories.
First is a study of the... | [
{
"created": "Mon, 29 Mar 2021 21:59:24 GMT",
"version": "v1"
}
] | 2021-04-01 | [
[
"Marsot",
"Loïc",
""
]
] | This PhD thesis is the conclusion of some of my works carried out at the Centre de Physique Th\'eorique, under the supervision of Serge Lazzarini. Two subjects are presented in the manuscript, both aiming at studying the effect of the spin of elementary particles on otherwise known theories. First is a study of the L\'... |
1404.0260 | Ahmad Sheykhi | A. Sheykhi, M. H. Dehghani and R. Dehghani | Horizon Thermodynamics and Gravitational Field Equations in
Quasi-Topological Gravity | 9 pages | Gen Relat. Gravit. 46 (2014) 1679 | 10.1007/s10714-014-1679-1 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | In this paper we show that the gravitational field equations of $(n+1)$%
-dimensional topological black holes with constant horizon curvature, in cubic
and quartic quasi-topological gravity, can be recast in the form of the first
law of thermodynamics, $dE=TdS-PdV$, at the black hole horizon. This procedure
leads to ... | [
{
"created": "Mon, 31 Mar 2014 16:37:58 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Sheykhi",
"A.",
""
],
[
"Dehghani",
"M. H.",
""
],
[
"Dehghani",
"R.",
""
]
] | In this paper we show that the gravitational field equations of $(n+1)$% -dimensional topological black holes with constant horizon curvature, in cubic and quartic quasi-topological gravity, can be recast in the form of the first law of thermodynamics, $dE=TdS-PdV$, at the black hole horizon. This procedure leads to ex... |
2001.05403 | Tommaso De Lorenzo | Tommaso De Lorenzo | Black Holes as a Gateway to the Quantum: Classical and Semi-Classical
Explorations | PhD Thesis - 146 pages; Lots of figures; Introductory sections are
not published elsewhere; The 5 Chapters overlap with published papers:
arXiv:1512.04566 [gr-qc], arXiv:1604.07222 [gr-qc], arXiv:1707.00479 [gr-qc],
arXiv:1807.02041 [gr-qc], arXiv:1811.03667 [gr-qc] | null | 10.13140/RG.2.2.18613.73449 | Num\'ero national de th\`ese / suffixe local: 2018AIXM0264 /
023ED352 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This thesis is entirely devoted to black hole physics as a natural arena to
study quantum gravity related questions. The five main Chapters present the
results already published in arXiv:1512.04566 [gr-qc], arXiv:1604.07222
[gr-qc], arXiv:1707.00479 [gr-qc], arXiv:1807.02041 [gr-qc], arXiv:1811.03667
[gr-qc]. A main ... | [
{
"created": "Wed, 15 Jan 2020 16:17:35 GMT",
"version": "v1"
}
] | 2020-01-16 | [
[
"De Lorenzo",
"Tommaso",
""
]
] | This thesis is entirely devoted to black hole physics as a natural arena to study quantum gravity related questions. The five main Chapters present the results already published in arXiv:1512.04566 [gr-qc], arXiv:1604.07222 [gr-qc], arXiv:1707.00479 [gr-qc], arXiv:1807.02041 [gr-qc], arXiv:1811.03667 [gr-qc]. A main in... |
gr-qc/9510051 | Jorge Griego | Jorge Griego | Is the third coefficient of the Jones knot polynomial a quantum state of
gravity? | 22 pages | Phys.Rev.D53:6966-6978,1996 | 10.1103/PhysRevD.53.6966 | IFFC preprint 95-03 (Montevideo) | gr-qc | null | Some time ago it was conjectured that the coefficients of an expansion of the
Jones polynomial in terms of the cosmological constant could provide an
infinite string of knot invariants that are solutions of the vacuum Hamiltonian
constraint of quantum gravity in the loop representation. Here we discuss the
status of ... | [
{
"created": "Wed, 25 Oct 1995 14:34:57 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Griego",
"Jorge",
""
]
] | Some time ago it was conjectured that the coefficients of an expansion of the Jones polynomial in terms of the cosmological constant could provide an infinite string of knot invariants that are solutions of the vacuum Hamiltonian constraint of quantum gravity in the loop representation. Here we discuss the status of th... |
gr-qc/0503117 | Gustavo Dotti | Gustavo Dotti and Reinaldo J. Gleiser | Linear stability of Einstein-Gauss-Bonnet static spacetimes. Part I:
tensor perturbations | 14 pages, 4 figures | Phys.Rev. D72 (2005) 044018 | 10.1103/PhysRevD.72.044018 | null | gr-qc hep-th | null | We study the stability under linear perturbations of a class of static
solutions of Einstein-Gauss-Bonnet gravity in $D=n+2$ dimensions with spatial
slices of the form $\Sigma_{\k}^n \times {\mathbb R}^+$, $\Sigma_{\k}^n$ an
$n-$manifold of constant curvature $\k$. Linear perturbations for this class of
space-times c... | [
{
"created": "Wed, 30 Mar 2005 11:51:35 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2005 11:50:48 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Dotti",
"Gustavo",
""
],
[
"Gleiser",
"Reinaldo J.",
""
]
] | We study the stability under linear perturbations of a class of static solutions of Einstein-Gauss-Bonnet gravity in $D=n+2$ dimensions with spatial slices of the form $\Sigma_{\k}^n \times {\mathbb R}^+$, $\Sigma_{\k}^n$ an $n-$manifold of constant curvature $\k$. Linear perturbations for this class of space-times can... |
1110.0065 | De-Cheng Zou | Kang Zhou, Rui-Hong Yue, Zhan-Ying Yang and De-Cheng Zou | Spontaneous Symmetry Breaking Vacuum Energy in Cosmology | 11 pages, no figure | null | 10.1088/1674-1056/21/7/079801 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In present paper the gravitational effect of spontaneous symmetry breaking
vacuum energy density is investigated by subtracting the flat space-time
contribution from the energy in the curved space-time. We found that the remain
effective energy-momentum tensor is too small to cause the acceleration of the
universe al... | [
{
"created": "Sat, 1 Oct 2011 02:32:05 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Zhou",
"Kang",
""
],
[
"Yue",
"Rui-Hong",
""
],
[
"Yang",
"Zhan-Ying",
""
],
[
"Zou",
"De-Cheng",
""
]
] | In present paper the gravitational effect of spontaneous symmetry breaking vacuum energy density is investigated by subtracting the flat space-time contribution from the energy in the curved space-time. We found that the remain effective energy-momentum tensor is too small to cause the acceleration of the universe alth... |
2108.09882 | Shiyang Hu | Shiyang Hu, Xin Wu, Enwei Liang | Construction of second-order six-dimensional Hamiltonian-conserving
scheme | 26 pages,13 figures | null | 10.3847/1538-4365/ac1ff3 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | It is shown analytically that the energy-conserving implicit nonsymplectic
scheme of Bacchini, Ripperda, Chen and Sironi provides a first-order accuracy
to numerical solutions of a six-dimensional conservative Hamiltonian system.
Because of this, a new second-order energy-conserving implicit scheme is
proposed. Numer... | [
{
"created": "Mon, 23 Aug 2021 01:17:09 GMT",
"version": "v1"
}
] | 2021-12-08 | [
[
"Hu",
"Shiyang",
""
],
[
"Wu",
"Xin",
""
],
[
"Liang",
"Enwei",
""
]
] | It is shown analytically that the energy-conserving implicit nonsymplectic scheme of Bacchini, Ripperda, Chen and Sironi provides a first-order accuracy to numerical solutions of a six-dimensional conservative Hamiltonian system. Because of this, a new second-order energy-conserving implicit scheme is proposed. Numeric... |
1407.8058 | Hrvoje Nikolic | H. Nikolic | If time is a local observable, then Hawking radiation is unitary | 11 pages, accepted for publication in Int. J. Quantum Inf. arXiv
admin note: substantial text overlap with arXiv:1101.2744 | Int. J. Quant. Inf. 12, 1560001 (2014) | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the usual formulation of quantum theory, time is a global classical
evolution parameter, not a local quantum observable. On the other hand, both
canonical quantum gravity (which lacks fundamental time-evolution parameter)
and the principle of spacetime covariance (which insists that time should be
treated on an eq... | [
{
"created": "Mon, 28 Jul 2014 07:10:39 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Nikolic",
"H.",
""
]
] | In the usual formulation of quantum theory, time is a global classical evolution parameter, not a local quantum observable. On the other hand, both canonical quantum gravity (which lacks fundamental time-evolution parameter) and the principle of spacetime covariance (which insists that time should be treated on an equa... |
1409.0720 | Sergey Chervon | Renat R. Abbyazov, Sergey V. Chervon, Volker M\"uller | $\sigma$CDM coupled to radiation. Dark energy and Universe acceleration | 11 pages, 7 figures | null | 10.1142/S021773231550114X | NIL GCA 6/2014 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the Chiral Cosmological Model (CCM) coupled to cold dark matter
(CDM) has been investigated as $\sigma$CDM model to study the observed
accelerated expansion of the Universe. Dark sector fields (as Dark Energy
content) coupled to cosmic dust were considered as the source of Einstein
gravity in Friedmann-Rober... | [
{
"created": "Tue, 2 Sep 2014 14:13:56 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Abbyazov",
"Renat R.",
""
],
[
"Chervon",
"Sergey V.",
""
],
[
"Müller",
"Volker",
""
]
] | Recently the Chiral Cosmological Model (CCM) coupled to cold dark matter (CDM) has been investigated as $\sigma$CDM model to study the observed accelerated expansion of the Universe. Dark sector fields (as Dark Energy content) coupled to cosmic dust were considered as the source of Einstein gravity in Friedmann-Roberts... |
gr-qc/0311046 | Edgard Casal de Rey Neto | E. C. de Rey Neto, J.C.N. de Araujo, O. D. Aguiar | Wave polarizations for a beam-like gravitational wave in quadratic
curvature gravity | 5 pages, 3 figures, minor corrections, to appear in CQG | Class.Quant.Grav. 21 (2004) S541-S544 | 10.1088/0264-9381/21/5/023 | null | gr-qc | null | We compute analytically the tidal field and polarizations of an exact
gravitational wave generated by a cylindrical beam of null matter of finite
width and length in quadratic curvature gravity. We propose that this wave can
represent the gravitational wave that keep up with the high energy photons
produced in a gamm... | [
{
"created": "Fri, 14 Nov 2003 10:50:46 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2003 15:01:04 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Neto",
"E. C. de Rey",
""
],
[
"de Araujo",
"J. C. N.",
""
],
[
"Aguiar",
"O. D.",
""
]
] | We compute analytically the tidal field and polarizations of an exact gravitational wave generated by a cylindrical beam of null matter of finite width and length in quadratic curvature gravity. We propose that this wave can represent the gravitational wave that keep up with the high energy photons produced in a gamma ... |
gr-qc/9909003 | Jerzy Kowalczynski | J.K. Kowalczynski (Institute of Physics, Polish Academy of Sciences) | A Twisting Electrovac Solution of Type II with the Cosmological Constant | 4 pages, LaTeX 2e, no figures. The present (second) version,
identical to that published in General Relativity and Gravitation, is derived
from the first version by presenting the admitted Killing vector, and by
adding the last paragraph, two footnotes (here Footnotes 1 and 3), and two
references (here Refs. [3... | Gen.Rel.Grav. 32 (2000) 959-962 | 10.1023/A:1001945310297 | null | gr-qc | null | An exact solution of the current-free Einstein-Maxwell equations with the
cosmological constant is presented. It is of Petrov type II, and its double
principal null vector is geodesic, shear-free, expanding, and twisting. The
solution contains five constants. Its electromagnetic field is non-null and
aligned. The sol... | [
{
"created": "Wed, 1 Sep 1999 14:14:27 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Nov 2000 12:20:16 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Kowalczynski",
"J. K.",
"",
"Institute of Physics, Polish Academy of Sciences"
]
] | An exact solution of the current-free Einstein-Maxwell equations with the cosmological constant is presented. It is of Petrov type II, and its double principal null vector is geodesic, shear-free, expanding, and twisting. The solution contains five constants. Its electromagnetic field is non-null and aligned. The solut... |
1506.02788 | Anuradha Gupta | Anuradha Gupta and Achamveedu Gopakumar | Time-domain inspiral templates for spinning compact binaries in
quasi-circular orbits | 10 pages, 1 figure. Contribution to the proceedings of "Equations of
Motion in Relativistic Gravity", Bad Honnef, Germany, 17 Feb - 23 Feb 2013 | null | 10.1007/978-3-319-18335-0_26 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a prescription to compute the time-domain gravitational wave (GW)
polarization states associated with spinning compact binaries inspiraling along
quasi-circular orbits. We invoke the orbital angular momentum ${\bf L}$ rather
than its Newtonian counterpart ${\bf L_{\rm N}}$ to describe the orbits and the
tw... | [
{
"created": "Tue, 9 Jun 2015 06:09:25 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Gupta",
"Anuradha",
""
],
[
"Gopakumar",
"Achamveedu",
""
]
] | We present a prescription to compute the time-domain gravitational wave (GW) polarization states associated with spinning compact binaries inspiraling along quasi-circular orbits. We invoke the orbital angular momentum ${\bf L}$ rather than its Newtonian counterpart ${\bf L_{\rm N}}$ to describe the orbits and the two ... |
2101.12688 | Gustav Mogull | Gustav Uhre Jakobsen, Gustav Mogull, Jan Plefka, Jan Steinhoff | Classical Gravitational Bremsstrahlung from a Worldline Quantum Field
Theory | v3: additional supplementary material; accepted for publication in
PRL | Phys. Rev. Lett. 126, 201103 (2021) | 10.1103/PhysRevLett.126.201103 | HU-EP-21/03-RTG | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the recently established formalism of a worldline quantum field theory
(WQFT) description of the classical scattering of two spinless black holes, we
compute the far-field time-domain waveform of the gravitational waves produced
in the encounter at leading order in the post-Minkowskian (weak field, but
generic ... | [
{
"created": "Fri, 29 Jan 2021 17:17:17 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Feb 2021 18:53:23 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Apr 2021 15:48:02 GMT",
"version": "v3"
}
] | 2021-05-26 | [
[
"Jakobsen",
"Gustav Uhre",
""
],
[
"Mogull",
"Gustav",
""
],
[
"Plefka",
"Jan",
""
],
[
"Steinhoff",
"Jan",
""
]
] | Using the recently established formalism of a worldline quantum field theory (WQFT) description of the classical scattering of two spinless black holes, we compute the far-field time-domain waveform of the gravitational waves produced in the encounter at leading order in the post-Minkowskian (weak field, but generic ve... |
2404.14766 | Phongpichit Channuie | Phongpichit Channuie (Walailak U.) | Observational Constraints on Asymptotic Safety Inflation in Gravity
Rainbow | v2: 20 pages, 4 figures, more references added, added discussion and
new plots. arXiv admin note: text overlap with arXiv:1903.05996,
arXiv:2005.08310 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Using suitable Renormalization Group (RG) based re-summation of quantum
corrections to $R^2$ term, a re-summed version of the effective Lagrangian can
be obtained \cite{Demmel:2015oqa}. In the context of gravity as an
Asymptotically Safe (AS) theory, authors of
Refs.\cite{Liu:2018hno,Koshelev:2022olc} proposed a refi... | [
{
"created": "Tue, 23 Apr 2024 06:05:26 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2024 08:43:26 GMT",
"version": "v2"
}
] | 2024-06-04 | [
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | Using suitable Renormalization Group (RG) based re-summation of quantum corrections to $R^2$ term, a re-summed version of the effective Lagrangian can be obtained \cite{Demmel:2015oqa}. In the context of gravity as an Asymptotically Safe (AS) theory, authors of Refs.\cite{Liu:2018hno,Koshelev:2022olc} proposed a refine... |
gr-qc/0109070 | Daniel Brown | Daniel Brown | The Time Vector: An Analysis of Continuity and Change | 46 pages, LaTeX2e, 2 figures | null | null | null | gr-qc | null | This paper sets out to explain: 1. Why the speed of light c is a constant and
is the maximum speed at which any moving entity can travel. 2. Why time elapsed
is different for a moving entity relative to a stationary entity. 3. Why there
has been confusion between the wave and particle nature of an entity. 4. The
rela... | [
{
"created": "Wed, 19 Sep 2001 18:36:53 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2002 12:28:53 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Nov 2002 17:25:25 GMT",
"version": "v3"
},
{
"created": "Mon, 14 Apr 2003 07:49:38 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Brown",
"Daniel",
""
]
] | This paper sets out to explain: 1. Why the speed of light c is a constant and is the maximum speed at which any moving entity can travel. 2. Why time elapsed is different for a moving entity relative to a stationary entity. 3. Why there has been confusion between the wave and particle nature of an entity. 4. The relati... |
gr-qc/0612018 | Paul R. Anderson | Paul R. Anderson and A. Fabbri | Apparent universality of semiclassical gravity in the far field limit | Title change, some details added, minor changes, acknowledgement
added, references added, 7 pages, no figures | Phys.Rev.D75:044015,2007 | 10.1103/PhysRevD.75.044015 | null | gr-qc hep-th | null | The universality of semiclassical gravity is investigated by considering the
behavior of the quantities < \phi^2 > and < {T^a}_b >, along with quantum
corrections to the effective Newtonian potential in the far field limits of
static spherically symmetric objects ranging from stars in the weak field
Newtonian limit t... | [
{
"created": "Mon, 4 Dec 2006 18:15:22 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2007 14:00:49 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Anderson",
"Paul R.",
""
],
[
"Fabbri",
"A.",
""
]
] | The universality of semiclassical gravity is investigated by considering the behavior of the quantities < \phi^2 > and < {T^a}_b >, along with quantum corrections to the effective Newtonian potential in the far field limits of static spherically symmetric objects ranging from stars in the weak field Newtonian limit to ... |
1709.10504 | Ziad Sakr georges | Ziad Sakr, Alain Blanchard | Testing General Relativity from Curvature & Energy contents at
Cosmological scale | To appeear in the proceedings of the 52st Rencontres de Moriond | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we examine what are the cosmological implications of allowing
the geometrical curvature density to behave independently from the energy
density contents. Using the full data extracted by Planck mission from CMB,
combined with BAO and SNIa measurements, we derive, in the light of this
approach, new constr... | [
{
"created": "Fri, 29 Sep 2017 17:27:09 GMT",
"version": "v1"
}
] | 2017-10-02 | [
[
"Sakr",
"Ziad",
""
],
[
"Blanchard",
"Alain",
""
]
] | In this work we examine what are the cosmological implications of allowing the geometrical curvature density to behave independently from the energy density contents. Using the full data extracted by Planck mission from CMB, combined with BAO and SNIa measurements, we derive, in the light of this approach, new constrai... |
0907.1620 | Woei Chet Lim | A. A. Coley, S. Hervik, W. C. Lim, M. A. H. MacCallum | Properties of kinematic singularities | 13 pages. Published version. One sentence from version 2 corrected | Class.Quant.Grav.26:215008,2009 | 10.1088/0264-9381/26/21/215008 | AEI-2009-064 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The locally rotationally symmetric tilted perfect fluid Bianchi type V
cosmological model provides examples of future geodesically complete spacetimes
that admit a `kinematic singularity' at which the fluid congruence is
inextendible but all frame components of the Weyl and Ricci tensors remain
bounded. We show that ... | [
{
"created": "Thu, 9 Jul 2009 17:04:15 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2009 11:52:35 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Oct 2009 13:58:21 GMT",
"version": "v3"
}
] | 2009-10-06 | [
[
"Coley",
"A. A.",
""
],
[
"Hervik",
"S.",
""
],
[
"Lim",
"W. C.",
""
],
[
"MacCallum",
"M. A. H.",
""
]
] | The locally rotationally symmetric tilted perfect fluid Bianchi type V cosmological model provides examples of future geodesically complete spacetimes that admit a `kinematic singularity' at which the fluid congruence is inextendible but all frame components of the Weyl and Ricci tensors remain bounded. We show that fo... |
2107.11352 | Fil Simovic | Gareth Arturo Marks, Fil Simovic, Robert B. Mann | Phase Transitions in 4D Gauss-Bonnet-de Sitter Black Holes | 23 pages, 6 figures. Updated references | null | 10.1103/PhysRevD.104.104056 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate thermodynamic aspects of black holes in the recently
formulated four dimensional Gauss-Bonnet theory of gravity, focusing on its
asymptotically de Sitter ($\Lambda>0$) solutions. We take a Euclidean path
integral approach, where thermodynamic data is fixed at a finite radius
`cavity' outside the black ... | [
{
"created": "Fri, 23 Jul 2021 17:10:47 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Aug 2021 21:48:13 GMT",
"version": "v2"
}
] | 2021-12-01 | [
[
"Marks",
"Gareth Arturo",
""
],
[
"Simovic",
"Fil",
""
],
[
"Mann",
"Robert B.",
""
]
] | We investigate thermodynamic aspects of black holes in the recently formulated four dimensional Gauss-Bonnet theory of gravity, focusing on its asymptotically de Sitter ($\Lambda>0$) solutions. We take a Euclidean path integral approach, where thermodynamic data is fixed at a finite radius `cavity' outside the black ho... |
gr-qc/0301003 | Matt Visser | Matt Visser (Victoria University of Wellington), Sayan Kar (Indian
Institute of Technology), and Naresh Dadhich (IUCAA, Pune) | Traversable wormholes with arbitrarily small energy condition violations | 4 pages, revtex4; V2: discussion refined and strengthened in view of
referee comments, no changes in physics conclusions. To appear in Physical
Review Letters | Phys.Rev.Lett.90:201102,2003 | 10.1103/PhysRevLett.90.201102 | null | gr-qc | null | Traversable wormholes necessarily require violations of the averaged null
energy condition; this being the definition of ``exotic matter''. However, the
theorems which guarantee the energy condition violation are remarkably silent
when it comes to making quantitative statements regarding the ``total amount''
of energ... | [
{
"created": "Wed, 1 Jan 2003 19:44:42 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Apr 2003 02:14:32 GMT",
"version": "v2"
}
] | 2011-07-18 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
],
[
"Kar",
"Sayan",
"",
"Indian\n Institute of Technology"
],
[
"Dadhich",
"Naresh",
"",
"IUCAA, Pune"
]
] | Traversable wormholes necessarily require violations of the averaged null energy condition; this being the definition of ``exotic matter''. However, the theorems which guarantee the energy condition violation are remarkably silent when it comes to making quantitative statements regarding the ``total amount'' of energy ... |
1601.05902 | Hamed Pejhan | Hamed Pejhan and Surena Rahbardehghan | Casimir energy-momentum tensor for a quantized bulk scalar field in the
geometry of two curved branes on Friedmann-Robertson-Walker background | 10 pages | Phys. Rev. D 94,064034 (2016) | 10.1103/PhysRevD.94.064034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous work [S. Rahbardehghan et al. in Phys. Lett. B 750, 627
(2015)], we considered a simple brane-world model; a single $4$-dimensional
brane embedded in a $5$-dimensional de Sitter (dS) space-time. Then, by
including a conformally coupled scalar field in the bulk, we studied the
induced Casimir energy-mome... | [
{
"created": "Fri, 22 Jan 2016 08:05:31 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2016 06:22:16 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Sep 2016 10:09:36 GMT",
"version": "v3"
}
] | 2016-12-21 | [
[
"Pejhan",
"Hamed",
""
],
[
"Rahbardehghan",
"Surena",
""
]
] | In a previous work [S. Rahbardehghan et al. in Phys. Lett. B 750, 627 (2015)], we considered a simple brane-world model; a single $4$-dimensional brane embedded in a $5$-dimensional de Sitter (dS) space-time. Then, by including a conformally coupled scalar field in the bulk, we studied the induced Casimir energy-moment... |
2007.06671 | Sam Patrick | Sam Patrick | Quasinormal modes in dispersive black hole analogues | 22 pages, 10 figures | null | null | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by analogue models of black holes, a scheme is developed to analyse
multi-mode scattering processes in dispersive, inhomogeneous media. The scheme
is applied to the scattering of weakly dispersive gravity waves with a
rotating, draining vortex flow, which captures many features of a rotating
black hole spac... | [
{
"created": "Mon, 13 Jul 2020 20:25:37 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Patrick",
"Sam",
""
]
] | Motivated by analogue models of black holes, a scheme is developed to analyse multi-mode scattering processes in dispersive, inhomogeneous media. The scheme is applied to the scattering of weakly dispersive gravity waves with a rotating, draining vortex flow, which captures many features of a rotating black hole spacet... |
1808.00673 | Madhavan Varadarajan | Madhavan Varadarajan | From Euclidean to Lorentzian Loop Quantum Gravity via a Positive
Complexifier | minor modification to section 5.2 | null | 10.1088/1361-6382/aaf2cd | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a positive complexifier, differentiable almost everywhere on the
classical phase space of real triads and $SU(2)$ connections, which generates a
Wick Transform from Euclidean to Lorentzian gravity everywhere except on a
phase space set of measure zero. This Wick transform assigns an equal role to
the sel... | [
{
"created": "Thu, 2 Aug 2018 05:53:04 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Aug 2018 07:13:20 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Varadarajan",
"Madhavan",
""
]
] | We construct a positive complexifier, differentiable almost everywhere on the classical phase space of real triads and $SU(2)$ connections, which generates a Wick Transform from Euclidean to Lorentzian gravity everywhere except on a phase space set of measure zero. This Wick transform assigns an equal role to the self ... |
gr-qc/9907038 | William Krivan | William Krivan (University of Utah) | Late-Time Dynamics of Scalar Fields on Rotating Black Hole Backgrounds | 4 pages, 4 Encapsulated Postscript figures, submitted to Phys. Rev. D | Phys.Rev.D60:101501,1999 | 10.1103/PhysRevD.60.101501 | null | gr-qc | null | Motivated by results of recent analytic studies, we present a numerical
investigation of the late-time dynamics of scalar test fields on Kerr
backgrounds. We pay particular attention to the issue of mixing of different
multipoles and their fall-off behavior at late times. Confining ourselves to
the special case of ax... | [
{
"created": "Thu, 8 Jul 1999 22:38:47 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Krivan",
"William",
"",
"University of Utah"
]
] | Motivated by results of recent analytic studies, we present a numerical investigation of the late-time dynamics of scalar test fields on Kerr backgrounds. We pay particular attention to the issue of mixing of different multipoles and their fall-off behavior at late times. Confining ourselves to the special case of axis... |
2005.10065 | Daniel Galviz Blanco | Daniel D. Sega and Daniel Galviz | Are the notions of past, present and future compatible with the General
Theory of Relativity? | There are some issues with the physics interpretation that leads to a
wrong perception of A-theory. The authors found with correction of these
issues hints that point out the fundamentality of B-theory. However, similar
arguments were already pointed out in previous literature | null | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notions of time and causality are revisited, as well as the A- and
B-theory of time, in order to determine which theory of time is most compatible
with relativistic spacetimes. By considering orientable spacetimes and defining
a time-orientation, we formalize the concepts of a time-series in relativistic
spacetim... | [
{
"created": "Wed, 20 May 2020 14:20:56 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2020 17:10:24 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Sep 2021 10:35:14 GMT",
"version": "v3"
}
] | 2021-09-09 | [
[
"Sega",
"Daniel D.",
""
],
[
"Galviz",
"Daniel",
""
]
] | The notions of time and causality are revisited, as well as the A- and B-theory of time, in order to determine which theory of time is most compatible with relativistic spacetimes. By considering orientable spacetimes and defining a time-orientation, we formalize the concepts of a time-series in relativistic spacetimes... |
2308.01784 | Aleksander Kozak | Aleksander Kozak, Aneta Wojnar | Earthquakes as probing tools for gravity theories | 6 pages, 3 figures | null | null | null | gr-qc astro-ph.EP | http://creativecommons.org/licenses/by/4.0/ | We propose a novel method for testing gravity models using seismic data from
Earth. By imposing observational constraints on Earth's moment of inertia and
mass, we rigorously limit the gravitational models' parameters within a
$2\sigma$ accuracy. Our method constrains the parameters governing additional
terms to the ... | [
{
"created": "Thu, 3 Aug 2023 14:23:33 GMT",
"version": "v1"
}
] | 2023-08-04 | [
[
"Kozak",
"Aleksander",
""
],
[
"Wojnar",
"Aneta",
""
]
] | We propose a novel method for testing gravity models using seismic data from Earth. By imposing observational constraints on Earth's moment of inertia and mass, we rigorously limit the gravitational models' parameters within a $2\sigma$ accuracy. Our method constrains the parameters governing additional terms to the Ge... |
0711.3538 | Nakia Carlevaro | Nakia Carlevaro, Orchidea Maria Lecian, Giovanni Montani | Macroscopic and Microscopic Paradigms for the Torsion Field: from the
Test-Particle Motion to a Lorentz Gauge Theory | 15 pages, no figures, invited paper | Ann. Fond. L. de Broglie 32, 281-295 (2007) | null | null | gr-qc astro-ph hep-th | null | Torsion represents the most natural extension of General Relativity and it
attracted interest over the years in view of its link with fundamental
properties of particle motion. The bulk of the approaches concerning the
torsion dynamics focus their attention on their geometrical nature and they are
naturally led to fo... | [
{
"created": "Thu, 22 Nov 2007 10:37:48 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2007 12:11:30 GMT",
"version": "v2"
}
] | 2009-03-24 | [
[
"Carlevaro",
"Nakia",
""
],
[
"Lecian",
"Orchidea Maria",
""
],
[
"Montani",
"Giovanni",
""
]
] | Torsion represents the most natural extension of General Relativity and it attracted interest over the years in view of its link with fundamental properties of particle motion. The bulk of the approaches concerning the torsion dynamics focus their attention on their geometrical nature and they are naturally led to form... |
1312.2670 | Narayan Banerjee | Nandan Roy and narayan Banerjee | Tracking quintessence: a dynamical systems study | 10 pages, 3 figures; Accepted for publication in Gen. Relativ. Gravit | null | 10.1007/s10714-013-1651-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the tracking condition, the stability of quintessence solutions are
examined. It is found that there is only one physically relevant fixed point
for the system generically. Two specific examples of quintessence potentials
are worked out in the frame work.
| [
{
"created": "Tue, 10 Dec 2013 05:19:12 GMT",
"version": "v1"
}
] | 2013-12-11 | [
[
"Roy",
"Nandan",
""
],
[
"Banerjee",
"narayan",
""
]
] | With the tracking condition, the stability of quintessence solutions are examined. It is found that there is only one physically relevant fixed point for the system generically. Two specific examples of quintessence potentials are worked out in the frame work. |
gr-qc/0505083 | Jonas Mureika | J. R. Mureika and C. C. Dyer | Multifractal Analysis of Packed Swiss Cheese Cosmologies | 3 latex files, 18 ps figures | Gen. Rel. Gravit. 36 (2004) 151-184 | 10.1023/B:GERG.0000006699.45969.49 | null | gr-qc | null | The multifractal spectrum of various three-dimensional representations of
Packed Swiss Cheese cosmologies in open, closed, and flat spaces are measured,
and it is determined that the curvature of the space does not alter the
associated fractal structure. These results are compared to observational data
and simulated ... | [
{
"created": "Tue, 17 May 2005 16:02:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mureika",
"J. R.",
""
],
[
"Dyer",
"C. C.",
""
]
] | The multifractal spectrum of various three-dimensional representations of Packed Swiss Cheese cosmologies in open, closed, and flat spaces are measured, and it is determined that the curvature of the space does not alter the associated fractal structure. These results are compared to observational data and simulated mo... |
1910.11017 | Jibril Ben Achour | Jibril Ben Achour, Hongguang Liu, Shinji Mukohyama | Hairy black holes in DHOST theories: Exploring disformal transformation
as a solution-generating method | 33 pages, 8 figures, matched the published version in JCAP | null | 10.1088/1475-7516/2020/02/023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solutions-generating methods based on field redefinitions, such as conformal
mapping, play an important role in investigating exact solutions in modified
gravity. In this work, we explore the possibility to use disformal field
redefinitions to investigate new regions of the solution space of DHOST
theories. The cruci... | [
{
"created": "Thu, 24 Oct 2019 10:27:46 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Nov 2019 14:41:22 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Feb 2020 15:03:06 GMT",
"version": "v3"
}
] | 2020-03-04 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Liu",
"Hongguang",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | Solutions-generating methods based on field redefinitions, such as conformal mapping, play an important role in investigating exact solutions in modified gravity. In this work, we explore the possibility to use disformal field redefinitions to investigate new regions of the solution space of DHOST theories. The crucial... |
1510.02085 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi | Onset of acceleration in a Universe initially filled by dark and
baryonic matters in nonminimally coupled teleparallel model | 16 pages, 3 figures, accepted for publication in Physical Review D | Phys. Rev. D 92, 123538 (2015) | 10.1103/PhysRevD.92.123538 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A nonminimally coupled quintessence dark energy in teleparallel model of
gravity is considered. It is clarified how a matter dominated universe with
initial negligible dark energy density can evolve to a late time de Sitter
space-time via the $Z_2$ symmetry breaking.
| [
{
"created": "Wed, 7 Oct 2015 13:15:19 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2015 11:09:29 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Dec 2015 07:52:10 GMT",
"version": "v3"
},
{
"created": "Tue, 22 Dec 2015 11:38:21 GMT",
"version": "v4"
}
] | 2016-01-06 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | A nonminimally coupled quintessence dark energy in teleparallel model of gravity is considered. It is clarified how a matter dominated universe with initial negligible dark energy density can evolve to a late time de Sitter space-time via the $Z_2$ symmetry breaking. |
0707.0708 | Owen Pavel Fernandez Piedra | Owen Pavel Fernandez Piedra and Alejandro Cabo Montes de Oca | Vacuum polarization of massive spinor fields in static black-string
backgrounds | 15 pages, few corrections are done in this version | Phys.Rev.D77:024044,2008 | 10.1103/PhysRevD.77.024044 | null | gr-qc | null | The renormalized mean value of the quantum Lagrangian and the corresponding
components of the Energy-Momentum tensor for massive spinor fields coupled to
an arbitrary gravitational field configuration having cylindrical symmetry are
analytically evaluated using the Schwinger-DeWitt approximation, up to second
order i... | [
{
"created": "Wed, 4 Jul 2007 22:55:23 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Sep 2007 15:54:02 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Piedra",
"Owen Pavel Fernandez",
""
],
[
"de Oca",
"Alejandro Cabo Montes",
""
]
] | The renormalized mean value of the quantum Lagrangian and the corresponding components of the Energy-Momentum tensor for massive spinor fields coupled to an arbitrary gravitational field configuration having cylindrical symmetry are analytically evaluated using the Schwinger-DeWitt approximation, up to second order in ... |
2312.06878 | Mir Mehedi Faruk | Mir Mehedi Faruk, Edward Morvan, Jan Pieter van der Schaar | Static sphere observers and geodesics in Schwarzschild-de Sitter
spacetime | null | JCAP 05 (2024) 118 | 10.1088/1475-7516/2024/05/118 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We analyze null- and spacelike radial geodesics in Schwarzschild-de Sitter
spacetime connecting two conjugate static sphere observers, i.e. free-falling
observers at a fixed radius in between the two horizons. We explicitly
determine the changes in the causal structure with respect to these natural
observers as a res... | [
{
"created": "Mon, 11 Dec 2023 23:03:37 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Feb 2024 22:35:06 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Apr 2024 12:03:52 GMT",
"version": "v3"
}
] | 2024-06-04 | [
[
"Faruk",
"Mir Mehedi",
""
],
[
"Morvan",
"Edward",
""
],
[
"van der Schaar",
"Jan Pieter",
""
]
] | We analyze null- and spacelike radial geodesics in Schwarzschild-de Sitter spacetime connecting two conjugate static sphere observers, i.e. free-falling observers at a fixed radius in between the two horizons. We explicitly determine the changes in the causal structure with respect to these natural observers as a resul... |
2007.09196 | Daniel Boyanovsky | Mudit Rai, Daniel Boyanovsky | On the origin of entropy of gravitationally produced dark matter: the
entanglement entropy | published version | Phys. Rev. D 102, 063532 (2020) | 10.1103/PhysRevD.102.063532 | null | gr-qc astro-ph.CO hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the emergence of entropy in gravitational production of dark matter
particles, ultra light scalars minimally coupled to gravity and heavier
fermions, from inflation to radiation domination (RD). Initial conditions
correspond to dark matter fields in their Bunch-Davies vacua during inflation.
The "out" states... | [
{
"created": "Fri, 17 Jul 2020 19:26:36 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Sep 2020 18:21:14 GMT",
"version": "v2"
}
] | 2020-09-30 | [
[
"Rai",
"Mudit",
""
],
[
"Boyanovsky",
"Daniel",
""
]
] | We study the emergence of entropy in gravitational production of dark matter particles, ultra light scalars minimally coupled to gravity and heavier fermions, from inflation to radiation domination (RD). Initial conditions correspond to dark matter fields in their Bunch-Davies vacua during inflation. The "out" states a... |
1901.09163 | Muhammad Fitrah Alfian Rangga Sakti | M. F. A. R. Sakti, A. Suroso and F. P. Zen | Kerr-Newman-NUT-Kiselev black holes in Rastall theory of gravity and
Kerr/CFT Correspondence | 25 pages, title and abstract are changed, major revision, accepted in
Annals of Physics | Annals of Physics (2020), 413, 168062 | 10.1016/j.aop.2019.168062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new twisted rotating black hole solution by performing
Demia{\'n}ski-Newman-Janis algorithm to the electrically and dyonically charged
black hole with quintessence in Rastall theory of gravity. Using our black hole
solution, we argue that Rastall gravity is not equivalent with Einstein
gravity. For furth... | [
{
"created": "Sat, 26 Jan 2019 05:00:14 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Sep 2019 13:59:53 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Dec 2019 11:03:27 GMT",
"version": "v3"
}
] | 2020-01-10 | [
[
"Sakti",
"M. F. A. R.",
""
],
[
"Suroso",
"A.",
""
],
[
"Zen",
"F. P.",
""
]
] | We present a new twisted rotating black hole solution by performing Demia{\'n}ski-Newman-Janis algorithm to the electrically and dyonically charged black hole with quintessence in Rastall theory of gravity. Using our black hole solution, we argue that Rastall gravity is not equivalent with Einstein gravity. For further... |
1812.05403 | Jorge Pullin | Rodolfo Gambini, Esteban Mato, Javier Olmedo, Jorge Pullin | Classical axisymmetric gravity in real Ashtekar variables | 14 pages, no figures, RevTex. Published version | Classical and Quantum Gravity 36 (2019) 125009 | 10.1088/1361-6382/ab1d82 | LSU-REL-121318 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate axisymmetric general relativity in terms of real
Ashtekar--Barbero variables. We study the constraints and equations of motion
and show how the Kerr, Schwarzschild and Minkowski solutions arise. We also
discuss boundary conditions. This opens the possibility of a midisuperspace
quantization using loop qu... | [
{
"created": "Thu, 13 Dec 2018 13:06:20 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 18:35:09 GMT",
"version": "v2"
}
] | 2019-06-03 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Mato",
"Esteban",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Pullin",
"Jorge",
""
]
] | We formulate axisymmetric general relativity in terms of real Ashtekar--Barbero variables. We study the constraints and equations of motion and show how the Kerr, Schwarzschild and Minkowski solutions arise. We also discuss boundary conditions. This opens the possibility of a midisuperspace quantization using loop quan... |
1803.10701 | Roberto Cotesta | Roberto Cotesta, Alessandra Buonanno, Alejandro Boh\'e, Andrea
Taracchini, Ian Hinder, Serguei Ossokine | Enriching the Symphony of Gravitational Waves from Binary Black Holes by
Tuning Higher Harmonics | 28 pages. Version that matches published article | Phys. Rev. D 98, 084028 (2018) | 10.1103/PhysRevD.98.084028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the first time, we construct an inspiral-merger-ringdown waveform model
within the effective-one-body formalism for spinning, nonprecessing binary
black holes that includes gravitational modes beyond the dominant $(\ell,|m|) =
(2,2)$ mode, specifically $(\ell,|m|)=(2,1),(3,3),(4,4),(5,5)$. Our multipolar
waveform... | [
{
"created": "Wed, 28 Mar 2018 16:02:50 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2022 14:13:29 GMT",
"version": "v2"
}
] | 2022-07-22 | [
[
"Cotesta",
"Roberto",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Bohé",
"Alejandro",
""
],
[
"Taracchini",
"Andrea",
""
],
[
"Hinder",
"Ian",
""
],
[
"Ossokine",
"Serguei",
""
]
] | For the first time, we construct an inspiral-merger-ringdown waveform model within the effective-one-body formalism for spinning, nonprecessing binary black holes that includes gravitational modes beyond the dominant $(\ell,|m|) = (2,2)$ mode, specifically $(\ell,|m|)=(2,1),(3,3),(4,4),(5,5)$. Our multipolar waveform m... |
2311.07408 | Elena Giorgi | Elena Giorgi | Boundedness and Decay for the Teukolsky System in Kerr-Newman Spacetime
I: The Case $|a|, |Q| \ll M$ | 109 pages | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove boundedness and polynomial decay statements for solutions of the
Teukolsky system for electromagnetic-gravitational perturbations of a
Kerr-Newman exterior background, with parameters satisfying $|a|, |Q| \ll M$.
The identification and analysis of the Teukolsky system in Kerr-Newman has long
been problematic... | [
{
"created": "Mon, 13 Nov 2023 15:41:53 GMT",
"version": "v1"
}
] | 2023-11-14 | [
[
"Giorgi",
"Elena",
""
]
] | We prove boundedness and polynomial decay statements for solutions of the Teukolsky system for electromagnetic-gravitational perturbations of a Kerr-Newman exterior background, with parameters satisfying $|a|, |Q| \ll M$. The identification and analysis of the Teukolsky system in Kerr-Newman has long been problematic d... |
gr-qc/0408073 | Valerio Faraoni | Valerio Faraoni | Negative energy and stability in scalar-tensor gravity | 9 pages, latex, to appear in Phys. Rev. D | Phys.Rev. D70 (2004) 081501 | 10.1103/PhysRevD.70.081501 | null | gr-qc | null | Linearized gravitational waves in Brans-Dicke and scalar-tensor theories
carry negative energy. A gauge-invariant analysis shows that the background
Minkowski space is stable at the classical level with respect to linear scalar
and tensor inhomogeneous perturbations.
| [
{
"created": "Fri, 20 Aug 2004 19:58:40 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Faraoni",
"Valerio",
""
]
] | Linearized gravitational waves in Brans-Dicke and scalar-tensor theories carry negative energy. A gauge-invariant analysis shows that the background Minkowski space is stable at the classical level with respect to linear scalar and tensor inhomogeneous perturbations. |
1306.3076 | Andreas Doering | Andreas Doering | Some Remarks on the Logic of Quantum Gravity | 17 pages, no figures | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss some conceptual issues that any approach to quantum gravity has to
confront. In particular, it is argued that one has to find a theory that can be
interpreted in a realist manner, because theories with an instrumentalist
interpretation are problematic for several well-known reasons. Since the
Hilbert space... | [
{
"created": "Thu, 13 Jun 2013 11:05:51 GMT",
"version": "v1"
}
] | 2013-06-14 | [
[
"Doering",
"Andreas",
""
]
] | We discuss some conceptual issues that any approach to quantum gravity has to confront. In particular, it is argued that one has to find a theory that can be interpreted in a realist manner, because theories with an instrumentalist interpretation are problematic for several well-known reasons. Since the Hilbert space f... |
2305.02642 | Xiangdong Zhang | Yunlong Liu and Xiangdong Zhang | Quasinormal modes of the Bardeen black hole with a cloud of strings | 11 pages, 15 figures | Chinese Physics C Vol. 47, No. 12 (2023) 125103 | 10.1088/1674-1137/acf3d5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the quasinormal mode and greybody factor of Bardeen black
holes with a string clouds by WKB approximation and verify them by Prony
algorithm. We found that the imaginary part of the quasinormal modes spectra is
always negative and the perturbation does not increase with the time,
indicating that the sy... | [
{
"created": "Thu, 4 May 2023 08:20:43 GMT",
"version": "v1"
}
] | 2023-11-09 | [
[
"Liu",
"Yunlong",
""
],
[
"Zhang",
"Xiangdong",
""
]
] | We investigate the quasinormal mode and greybody factor of Bardeen black holes with a string clouds by WKB approximation and verify them by Prony algorithm. We found that the imaginary part of the quasinormal modes spectra is always negative and the perturbation does not increase with the time, indicating that the syst... |
1005.1491 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | An intrinsic characterization of 2+2 warped spacetimes | 18 pages; submitted to Class. Quantum Grav. | Class.Quant.Grav.27:205023,2010 | 10.1088/0264-9381/27/20/205023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give several equivalent conditions that characterize the 2+2 warped
spacetimes: imposing the existence of a Killing-Yano tensor $A$ subject to
complementary algebraic restrictions; in terms of the projector $v$ (or of the
canonical 2-form $U$) associated with the 2-planes of the warped product. These
planes are pr... | [
{
"created": "Mon, 10 May 2010 11:10:08 GMT",
"version": "v1"
}
] | 2012-04-19 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | We give several equivalent conditions that characterize the 2+2 warped spacetimes: imposing the existence of a Killing-Yano tensor $A$ subject to complementary algebraic restrictions; in terms of the projector $v$ (or of the canonical 2-form $U$) associated with the 2-planes of the warped product. These planes are prin... |
1701.01569 | Igor Nikitin | Igor Nikitin | Static spherically symmetric solutions of Einstein field equations with
radial dark matter | null | 2017 Int. J. Mod. Phys. C 28 1750096 | 10.1142/S0129183117500966 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a static spherically symmetric problem with a black hole and
radially directed geodesic flows of dark matter. The obtained solutions have
the following properties. At large distances, the gravitational field produces
constant velocities of circular motion, i.e., flat rotation curves. At smaller
distances, th... | [
{
"created": "Fri, 6 Jan 2017 08:25:20 GMT",
"version": "v1"
}
] | 2021-02-11 | [
[
"Nikitin",
"Igor",
""
]
] | We study a static spherically symmetric problem with a black hole and radially directed geodesic flows of dark matter. The obtained solutions have the following properties. At large distances, the gravitational field produces constant velocities of circular motion, i.e., flat rotation curves. At smaller distances, the ... |
1302.4368 | Daniel Siegel | Daniel M. Siegel, Riccardo Ciolfi, Abraham I. Harte, Luciano Rezzolla | Magnetorotational instability in relativistic hypermassive neutron stars | 5 pages, 4 figures. Updated to match published version | Phys. Rev. D 87, 121302(R) (2013) | 10.1103/PhysRevD.87.121302 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A differentially rotating hypermassive neutron star (HMNS) is a metastable
object which can be formed in the merger of neutron-star binaries. The eventual
collapse of the HMNS into a black hole is a key element in generating the
physical conditions expected to accompany the launch of a short gamma-ray
burst. We inves... | [
{
"created": "Mon, 18 Feb 2013 17:43:23 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2013 09:55:51 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Jul 2013 10:43:54 GMT",
"version": "v3"
}
] | 2013-07-18 | [
[
"Siegel",
"Daniel M.",
""
],
[
"Ciolfi",
"Riccardo",
""
],
[
"Harte",
"Abraham I.",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | A differentially rotating hypermassive neutron star (HMNS) is a metastable object which can be formed in the merger of neutron-star binaries. The eventual collapse of the HMNS into a black hole is a key element in generating the physical conditions expected to accompany the launch of a short gamma-ray burst. We investi... |
1511.02936 | Martin Kolo\v{s} | Zden\v{e}k Stuchl\'ik, Martin Kolo\v{s} | Acceleration of charged particles due to chaotic scattering in the
combined black hole gravitational field and asymptotically uniform magnetic
field | 21 pages, 13 figures | null | 10.1140/epjc/s10052-015-3862-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To test the role of large-scale magnetic fields in accretion processes, we
study dynamics of charged test particles in vicinity of a black hole immersed
into an asymptotically uniform magnetic field. Using the Hamiltonian formalism
of charged particle dynamics, we examine chaotic scattering in the effective
potential... | [
{
"created": "Mon, 9 Nov 2015 23:54:31 GMT",
"version": "v1"
}
] | 2016-02-17 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Kološ",
"Martin",
""
]
] | To test the role of large-scale magnetic fields in accretion processes, we study dynamics of charged test particles in vicinity of a black hole immersed into an asymptotically uniform magnetic field. Using the Hamiltonian formalism of charged particle dynamics, we examine chaotic scattering in the effective potential r... |
gr-qc/0404038 | Dmitri Fursaev | Dmitri V. Fursaev | Can One Understand Black Hole Entropy without Knowing Much about Quantum
Gravity? | 38 pages | Phys.Part.Nucl. 36 (2005) 81-99; Fiz.Elem.Chast.Atom.Yadra 36
(2005) 146-182 | null | null | gr-qc hep-th | null | It is a common belief now that the explanation of the microscopic origin of
the Bekenstein-Hawking entropy of black holes should be available in quantum
gravity theory, whatever this theory will finally look like. Calculations of
the entropy of certain black holes in string theory do support this point of
view. In th... | [
{
"created": "Thu, 8 Apr 2004 12:11:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fursaev",
"Dmitri V.",
""
]
] | It is a common belief now that the explanation of the microscopic origin of the Bekenstein-Hawking entropy of black holes should be available in quantum gravity theory, whatever this theory will finally look like. Calculations of the entropy of certain black holes in string theory do support this point of view. In the ... |
0802.2023 | Antoine Petiteau | Antoine Petiteau (APC), G. Auger (APC), H. Halloin (APC), O. Jeannin
(APC), E. Plagnol (APC), Sophie Pireaux (ARTEMIS), Tania Regimbau (ARTEMIS),
J.-Y. Vinet (ARTEMIS) | LISACode : A scientific simulator of LISA | null | Phys.Rev.D77:023002,2008 | 10.1103/PhysRevD.77.023002 | null | gr-qc astro-ph | null | A new LISA simulator (LISACode) is presented. Its ambition is to achieve a
new degree of sophistication allowing to map, as closely as possible, the
impact of the different sub-systems on the measurements. LISACode is not a
detailed simulator at the engineering level but rather a tool whose purpose is
to bridge the g... | [
{
"created": "Thu, 14 Feb 2008 14:29:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Petiteau",
"Antoine",
"",
"APC"
],
[
"Auger",
"G.",
"",
"APC"
],
[
"Halloin",
"H.",
"",
"APC"
],
[
"Jeannin",
"O.",
"",
"APC"
],
[
"Plagnol",
"E.",
"",
"APC"
],
[
"Pireaux",
"Sophie",
"",
"ARTEMIS"... | A new LISA simulator (LISACode) is presented. Its ambition is to achieve a new degree of sophistication allowing to map, as closely as possible, the impact of the different sub-systems on the measurements. LISACode is not a detailed simulator at the engineering level but rather a tool whose purpose is to bridge the gap... |
0803.0277 | Christophe Le Poncin-Lafitte | Pierre Teyssandier and Christophe Le Poncin-Lafitte | General post-Minkowskian expansion of time transfer functions | 10 pages. Minor modifications. Accepted in Classical and Quantum
Gravity | Class.Quant.Grav.25:145020,2008 | 10.1088/0264-9381/25/14/145020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modeling most of the tests of general relativity requires to know the
function relating light travel time to the coordinate time of reception and to
the spatial coordinates of the emitter and the receiver. We call such a
function the reception time transfer function. Of course, an emission time
transfer function may ... | [
{
"created": "Mon, 3 Mar 2008 16:26:40 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 2008 09:45:32 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Jun 2008 15:42:40 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Teyssandier",
"Pierre",
""
],
[
"Poncin-Lafitte",
"Christophe Le",
""
]
] | Modeling most of the tests of general relativity requires to know the function relating light travel time to the coordinate time of reception and to the spatial coordinates of the emitter and the receiver. We call such a function the reception time transfer function. Of course, an emission time transfer function may as... |
1002.0308 | Silke Weinfurtner | Silke Weinfurtner, Thomas P. Sotiriou and Matt Visser | Projectable Horava-Lifshitz gravity in a nutshell | 8 pages, no figures, to appear in the proceedings of First
Mediterranean Conference on Classical and Quantum Gravity Conference (MCCQG),
Kolymbari (Crete, Greece), September 14-18, 2009 | J. Phys.: Conf. Ser. 222, 012054 (2010) | 10.1088/1742-6596/222/1/012054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Approximately one year ago Horava proposed a power-counting renormalizable
theory of gravity which abandons local Lorentz invariance. The proposal has
been received with growing interest and resulted in various different versions
of Horava-Lifshitz gravity theories, involving a colourful potpourri of new
terminology.... | [
{
"created": "Mon, 1 Feb 2010 19:18:14 GMT",
"version": "v1"
}
] | 2011-06-03 | [
[
"Weinfurtner",
"Silke",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Visser",
"Matt",
""
]
] | Approximately one year ago Horava proposed a power-counting renormalizable theory of gravity which abandons local Lorentz invariance. The proposal has been received with growing interest and resulted in various different versions of Horava-Lifshitz gravity theories, involving a colourful potpourri of new terminology. I... |
0812.1767 | Ricardo Monteiro | Ricardo Monteiro and Jorge E. Santos | Negative modes and the thermodynamics of Reissner-Nordstr\"om black
holes | 24 pages, 1 figure; v2 minor changes to fit published version | Phys. Rev. D 79, 064006 (2009) | 10.1103/PhysRevD.79.064006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the problem of negative modes of the Euclidean section of the
Reissner-Nordstr\"om black hole in four dimensions. We find analytically that a
negative mode disappears when the specific heat at constant charge becomes
positive. The sector of perturbations analysed here is included in the
canonical partition... | [
{
"created": "Tue, 9 Dec 2008 18:47:39 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Mar 2009 18:09:48 GMT",
"version": "v2"
}
] | 2009-07-30 | [
[
"Monteiro",
"Ricardo",
""
],
[
"Santos",
"Jorge E.",
""
]
] | We analyse the problem of negative modes of the Euclidean section of the Reissner-Nordstr\"om black hole in four dimensions. We find analytically that a negative mode disappears when the specific heat at constant charge becomes positive. The sector of perturbations analysed here is included in the canonical partition f... |
1806.05195 | Vitor Cardoso | Leor Barack, Vitor Cardoso, Samaya Nissanke, Thomas P. Sotiriou, Abbas
Askar, Krzysztof Belczynski, Gianfranco Bertone, Edi Bon, Diego Blas, Richard
Brito, Tomasz Bulik, Clare Burrage, Christian T. Byrnes, Chiara Caprini,
Masha Chernyakova, Piotr Chrusciel, Monica Colpi, Valeria Ferrari, Daniele
Gaggero, Jonath... | Black holes, gravitational waves and fundamental physics: a roadmap | White Paper for the COST action "Gravitational Waves, Black Holes,
and Fundamental Physics", 272 pages, 12 figures; v4: updated references and
author list. Overall improvements and corrections. To appear in Classical and
Quantum Gravity | null | 10.1088/1361-6382/ab0587 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The grand challenges of contemporary fundamental physics---dark matter, dark
energy, vacuum energy, inflation and early universe cosmology, singularities
and the hierarchy problem---all involve gravity as a key component. And of all
gravitational phenomena, black holes stand out in their elegant simplicity,
while har... | [
{
"created": "Wed, 13 Jun 2018 18:00:06 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jun 2018 18:00:03 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Jul 2018 20:41:48 GMT",
"version": "v3"
},
{
"created": "Fri, 1 Feb 2019 08:42:45 GMT",
"version": "v4"
}
] | 2019-07-17 | [
[
"Barack",
"Leor",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Nissanke",
"Samaya",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Askar",
"Abbas",
""
],
[
"Belczynski",
"Krzysztof",
""
],
[
"Bertone",
"Gianfranco",
""
... | The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem---all involve gravity as a key component. And of all gravitational phenomena, black holes stand out in their elegant simplicity, while harbo... |
0812.0993 | Jonathan Ziprick | J. Ziprick, G. Kunstatter | Spherically Symmetric Black Hole Formation in Painlev\'e-Gullstrand
Coordinates | 12 pages, 7 figures | Phys.Rev.D79:101503,2009 | 10.1103/PhysRevD.79.101503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a numerical study of black hole formation from the spherically
symmetric collapse of a massless scalar field. The calculations are done in
Painlev\'e-Gullstrand (PG) coordinates that extend across apparent horizons and
allow the numerical evolution to proceed until the onset of singularity
formation. We ge... | [
{
"created": "Thu, 4 Dec 2008 17:47:22 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Ziprick",
"J.",
""
],
[
"Kunstatter",
"G.",
""
]
] | We perform a numerical study of black hole formation from the spherically symmetric collapse of a massless scalar field. The calculations are done in Painlev\'e-Gullstrand (PG) coordinates that extend across apparent horizons and allow the numerical evolution to proceed until the onset of singularity formation. We gene... |
gr-qc/0107031 | Herbert W. Hamber | H.W. Hamber and G. Kagel | Exact Bianchi Identity in Regge Gravity | LaTeX, 45 pages, 6 figures, revised & expanded, references added | Class.Quant.Grav. 21 (2004) 5915-5948 | 10.1088/0264-9381/21/24/013 | null | gr-qc | null | In the continuum the Bianchi identity implies a relationship between
different components of the curvature tensor, thus ensuring the internal
consistency of the gravitational field equations. In this paper an exact form
for the Bianchi identity in Regge's discrete formulation of gravity is derived,
by considering app... | [
{
"created": "Tue, 10 Jul 2001 05:47:18 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Oct 2004 20:16:50 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Hamber",
"H. W.",
""
],
[
"Kagel",
"G.",
""
]
] | In the continuum the Bianchi identity implies a relationship between different components of the curvature tensor, thus ensuring the internal consistency of the gravitational field equations. In this paper an exact form for the Bianchi identity in Regge's discrete formulation of gravity is derived, by considering appro... |
1609.05893 | Alireza Talebian Ashkezari | Alireza Talebian-Ashkezari, Nahid Ahmadi, Ali Akbar Abolhasani | \bf $\delta M$ Formalism: A New Approach to Cosmological Perturbation
Theory in Anisotropic Inflation | 35 pages, 2 figures | JCAP 03(2018)001 | 10.1088/1475-7516/2018/03/001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of the metric perturbations in a Bianchi background in
the long-wavelength limit. By applying the gradient expansion to the equations
of motion we exhibit a generalized "Separate Universe" approach to the
cosmological perturbation theory. Having found this consistent separate
universe picture, ... | [
{
"created": "Mon, 19 Sep 2016 13:25:39 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Mar 2018 05:30:54 GMT",
"version": "v2"
}
] | 2018-03-13 | [
[
"Talebian-Ashkezari",
"Alireza",
""
],
[
"Ahmadi",
"Nahid",
""
],
[
"Abolhasani",
"Ali Akbar",
""
]
] | We study the evolution of the metric perturbations in a Bianchi background in the long-wavelength limit. By applying the gradient expansion to the equations of motion we exhibit a generalized "Separate Universe" approach to the cosmological perturbation theory. Having found this consistent separate universe picture, we... |
0904.4435 | Francesco Cianfrani dr | F. Cianfrani, G. Montani | Matter in Loop Quantum Gravity without time gauge: a non-minimally
coupled scalar field | 6 pages | Phys. Rev. D 80, (2009) 084045 | 10.1103/PhysRevD.80.084045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the phase space of gravity non-minimally coupled to a scalar field
in a generic local Lorentz frame. We reduce the set of constraints to a
first-class one by fixing a specific hypersurfaces in the phase space. The main
issue of our analysis is to extend the features of the vacuum case to the
presence of sc... | [
{
"created": "Tue, 28 Apr 2009 16:07:08 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Nov 2009 17:32:36 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Cianfrani",
"F.",
""
],
[
"Montani",
"G.",
""
]
] | We analyze the phase space of gravity non-minimally coupled to a scalar field in a generic local Lorentz frame. We reduce the set of constraints to a first-class one by fixing a specific hypersurfaces in the phase space. The main issue of our analysis is to extend the features of the vacuum case to the presence of scal... |
gr-qc/0108008 | Brien C. Nolan | Filipe C Mena, Brien C Nolan | Non-radial null geodesics in spherical dust collapse | 26 pages, 1 figure | Class.Quant.Grav. 18 (2001) 4531-4548 | 10.1088/0264-9381/18/21/310 | null | gr-qc | null | The issue of the local visibility of the shell-focussing singularity in
marginally bound spherical dust collapse is considered from the point of view
of the existence of future-directed null geodesics with angular momentum which
emanate from the singularity. The initial data (i.e. the initial density
profile) at the ... | [
{
"created": "Thu, 2 Aug 2001 17:53:28 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Mena",
"Filipe C",
""
],
[
"Nolan",
"Brien C",
""
]
] | The issue of the local visibility of the shell-focussing singularity in marginally bound spherical dust collapse is considered from the point of view of the existence of future-directed null geodesics with angular momentum which emanate from the singularity. The initial data (i.e. the initial density profile) at the on... |
1604.01157 | Aymen Hamid Mr | Aymen I. M. Hamid, Rituparno Goswami and Sunil D. Maharaj | Notes on Cosmic Censorship Conjecture revisited: Covariantly | 6 pages, Conference proceeding for MG14, submitted to MG14 2015,
based on arXiv:1402.4355 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the dynamics of the trapped region using a frame
independent semi-tetrad covariant formalism for general Locally Rotationally
Symmetric (LRS) class II spacetimes. We covariantly prove some important
geometrical results for the apparent horizon, and state the necessary and
sufficient conditions ... | [
{
"created": "Tue, 5 Apr 2016 07:15:27 GMT",
"version": "v1"
}
] | 2016-04-06 | [
[
"Hamid",
"Aymen I. M.",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | In this paper we study the dynamics of the trapped region using a frame independent semi-tetrad covariant formalism for general Locally Rotationally Symmetric (LRS) class II spacetimes. We covariantly prove some important geometrical results for the apparent horizon, and state the necessary and sufficient conditions fo... |
gr-qc/9710029 | Maartens R. Staf | L Chimento, A Jakubi, V Mendez and R Maartens | Cosmological solutions with nonlinear bulk viscosity | 16 pages Latex (IOP style); to appear Class. Quantum Grav | Class.Quant.Grav. 14 (1997) 3363-3375 | 10.1088/0264-9381/14/12/019 | null | gr-qc | null | A recently proposed nonlinear transport equation is used to model bulk
viscous cosmologies that may be far from equilibrium, as happens during viscous
fluid inflation or during reheating. The asymptotic stability of the de Sitter
and Friedmann solutions is investigated. The former is stable for bulk
viscosity index $... | [
{
"created": "Mon, 6 Oct 1997 06:51:49 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Chimento",
"L",
""
],
[
"Jakubi",
"A",
""
],
[
"Mendez",
"V",
""
],
[
"Maartens",
"R",
""
]
] | A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk viscosity index $q<... |
2405.01594 | Gaurav Gadbail | Gaurav N. Gadbail, P.K. Sahoo | Modified $f(Q)$ gravity models and their cosmological consequences | Chinese Journal of Physics published version | Chinese Journal of Physics 89 (2024) 1754-1762 | 10.1016/j.cjph.2024.04.037 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we consider three different $f(Q)$ models, such as power-law,
exponential, and logarithmic, to study which model better mimics $\Lambda$CDM
evolution theoretically. Henceforth, we determine solutions to the $f(Q)$
gravity field equations in the isotropic and homogeneous universe. Since all
the models co... | [
{
"created": "Tue, 30 Apr 2024 09:42:03 GMT",
"version": "v1"
}
] | 2024-05-10 | [
[
"Gadbail",
"Gaurav N.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this work, we consider three different $f(Q)$ models, such as power-law, exponential, and logarithmic, to study which model better mimics $\Lambda$CDM evolution theoretically. Henceforth, we determine solutions to the $f(Q)$ gravity field equations in the isotropic and homogeneous universe. Since all the models cont... |
1204.0774 | Hoavo Hova | Hoavo Hova | A Dark Energy Model in Lyra Manifold | 15 pages, 2 figures, LaTeX file | Journal of Geometry and Physics 64 (2013) 146-154 | 10.1016/j.geomphys.2012.08.004 | null | gr-qc | http://creativecommons.org/licenses/publicdomain/ | We consider, in normal-gauge Lyra's geometry, evolution of a homogeneous
isotropic universe in a gravitational model involving only the standard matter
in interaction with a displacement vector field $\phi_{\mu}$. Considering both
constant and time-dependent displacement vector field we show that the observed
cosmic ... | [
{
"created": "Sun, 1 Apr 2012 05:52:23 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2012 08:54:34 GMT",
"version": "v2"
}
] | 2012-12-18 | [
[
"Hova",
"Hoavo",
""
]
] | We consider, in normal-gauge Lyra's geometry, evolution of a homogeneous isotropic universe in a gravitational model involving only the standard matter in interaction with a displacement vector field $\phi_{\mu}$. Considering both constant and time-dependent displacement vector field we show that the observed cosmic ac... |
1507.01580 | Cedric Troessaert | Cedric Troessaert | Poisson Structure of the Boundary Gravitons in 3D Gravity with Negative
$\Lambda$ | null | null | 10.1088/0264-9381/32/23/235019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the hamiltonian formalism to study the asymptotic structure of 3
dimensional gravity with a negative cosmological constant. We start by defining
very general fall-off conditions for the canonical variables and study the
implied poisson structure of the boundary gravitons. From the allowed
differentiable gauge ... | [
{
"created": "Mon, 6 Jul 2015 19:52:15 GMT",
"version": "v1"
}
] | 2015-12-09 | [
[
"Troessaert",
"Cedric",
""
]
] | We use the hamiltonian formalism to study the asymptotic structure of 3 dimensional gravity with a negative cosmological constant. We start by defining very general fall-off conditions for the canonical variables and study the implied poisson structure of the boundary gravitons. From the allowed differentiable gauge tr... |
0901.2741 | James Lindesay | James Lindesay | Global Structure of a Multi-Fluid Cosmology | 18 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fluid cosmologies are consistent with the generally accepted observational
evidence during intermediate and late times, and they need not have singular
behavior in primordial times. A general form for fluid cosmology consistent
with Einstein's equation is demonstrated, and a dynamic metric that
incorporates fluid sca... | [
{
"created": "Sun, 18 Jan 2009 22:17:48 GMT",
"version": "v1"
}
] | 2009-01-20 | [
[
"Lindesay",
"James",
""
]
] | Fluid cosmologies are consistent with the generally accepted observational evidence during intermediate and late times, and they need not have singular behavior in primordial times. A general form for fluid cosmology consistent with Einstein's equation is demonstrated, and a dynamic metric that incorporates fluid scale... |
gr-qc/0607003 | Carlos Augusto Romero Filho | J. B. Formiga and C. Romero | On the spectral shift and the time delay of light in a Rindler
accelerated frame | 12 pages, 3 figures | Int.J.Mod.Phys.D16:699-710,2007 | 10.1142/S021827180700984X | null | gr-qc | null | We discuss two effects predicted by the general theory of relativity in the
context of Rindler accelerated observers: the gravitational spectral shift and
the time delay of light. We show that these effects also appear in a Rindler
frame in the absence of gravitational field, in accordance with the Einstein's
equival... | [
{
"created": "Sun, 2 Jul 2006 14:29:46 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Formiga",
"J. B.",
""
],
[
"Romero",
"C.",
""
]
] | We discuss two effects predicted by the general theory of relativity in the context of Rindler accelerated observers: the gravitational spectral shift and the time delay of light. We show that these effects also appear in a Rindler frame in the absence of gravitational field, in accordance with the Einstein's equivalen... |
2001.01591 | Mubasher Jamil | Seyed Hossein Hendi, Azadeh Nemati, Kai Lin, Mubasher Jamil | Instability and phase transitions of a rotating black hole in the
presence of perfect fluid dark matter | 13 pages, 14 figures, version accepted for publication in Eur. Phys.
J. C | Eur. Phys. J. C (2020) 80:296 | 10.1140/epjc/s10052-020-7829-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the thermodynamic features of a rotating black hole
surrounded by perfect fluid dark matter. We analyze the critical behavior of
the black hole by considering the known relationship between pressure and
cosmological constant. We show that the black hole admits a first order phase
transition an... | [
{
"created": "Thu, 2 Jan 2020 06:28:46 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Mar 2020 04:50:01 GMT",
"version": "v2"
}
] | 2020-04-03 | [
[
"Hendi",
"Seyed Hossein",
""
],
[
"Nemati",
"Azadeh",
""
],
[
"Lin",
"Kai",
""
],
[
"Jamil",
"Mubasher",
""
]
] | In this paper, we study the thermodynamic features of a rotating black hole surrounded by perfect fluid dark matter. We analyze the critical behavior of the black hole by considering the known relationship between pressure and cosmological constant. We show that the black hole admits a first order phase transition and,... |
2301.01551 | Songbai Chen | Xin Qin, Songbai Chen, Zelin Zhang, Jiliang Jing | Polarized image of a rotating black hole surrounded by a cold dark
matter halo | 17 pages, 10 figures, Accepted for publication in EPJC | Eur. Phys. J. C 83, 159 (2023) | 10.1140/epjc/s10052-023-11300-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied the polarized image of an equatorial emitting ring around a
rotating black hole surrounded by a cold dark matter (CDM) halo. Results show
that the CDM halo density has the similar effects of the halo's characteristic
radius on the polarized image for the black hole. The effects of the CDM halo
on the ... | [
{
"created": "Wed, 4 Jan 2023 11:42:45 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Feb 2023 03:11:05 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Qin",
"Xin",
""
],
[
"Chen",
"Songbai",
""
],
[
"Zhang",
"Zelin",
""
],
[
"Jing",
"Jiliang",
""
]
] | We have studied the polarized image of an equatorial emitting ring around a rotating black hole surrounded by a cold dark matter (CDM) halo. Results show that the CDM halo density has the similar effects of the halo's characteristic radius on the polarized image for the black hole. The effects of the CDM halo on the po... |
gr-qc/9509041 | Henri Waelbroeck | A. Criscuolo, H. Quevedo and H. Waelbroeck (Instituto de Ciencias
Nucleares, UNAM, Mexico) | Quantization of 2+1 Gravity on the Torus | TeX file, 11 pages, proceedings of the CAP 95 meeting in Quebec | null | null | null | gr-qc | null | We use the polygon representation of 2+1--dimensional gravity to explicitly
carry out the canonical quantization of a universe with the topology of a
torus. The mapping-class-invariant wave function for a quantum ''big bounce'',
is reminiscent of the interference patterns of linear gratings. We consider the
``problem... | [
{
"created": "Fri, 22 Sep 1995 17:37:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Criscuolo",
"A.",
"",
"Instituto de Ciencias\n Nucleares, UNAM, Mexico"
],
[
"Quevedo",
"H.",
"",
"Instituto de Ciencias\n Nucleares, UNAM, Mexico"
],
[
"Waelbroeck",
"H.",
"",
"Instituto de Ciencias\n Nucleares, UNAM, Mexico"
]
] | We use the polygon representation of 2+1--dimensional gravity to explicitly carry out the canonical quantization of a universe with the topology of a torus. The mapping-class-invariant wave function for a quantum ''big bounce'', is reminiscent of the interference patterns of linear gratings. We consider the ``problem o... |
gr-qc/0603107 | Gabriele Gionti S.J. | Gabriele Gionti S.J | From Local Regge Calculus towards Spin Foam Formalism? | 14 pages, 1 figures, proceeding of the Albert Einstein's
International Conference 18-22 July 2005 | null | null | null | gr-qc hep-lat hep-th math-ph math.MP | null | We introduce the basic elements of SO(n)-local theory of Regge Calculus. A
first order formalism, in the sense of Palatini, is defined on the metric-dual
Voronoi complex of a simplicial complex. The Quantum Measure exhibits an
expansion, in four dimensions, in characters of irreducible representation of
SO(4) which h... | [
{
"created": "Tue, 28 Mar 2006 19:39:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"J",
"Gabriele Gionti S.",
""
]
] | We introduce the basic elements of SO(n)-local theory of Regge Calculus. A first order formalism, in the sense of Palatini, is defined on the metric-dual Voronoi complex of a simplicial complex. The Quantum Measure exhibits an expansion, in four dimensions, in characters of irreducible representation of SO(4) which has... |
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