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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9607030 | G. Kunstatter | A. Barvinsky (Lebedev Physics Institute) and G. Kunstatter (University
of Winnipeg) | Mass Spectrum for Black Holes in Generic 2-D Dilaton Gravity | 6 pages, Latex | null | null | null | gr-qc | null | Two arguments for the quantization of entropy for black holes in generic 2-D
dilaton gravity are summarized. The first argument is based on reduced
quantization of the only physical observables in the theory, namely the black
hole mass and its conjugate momentum, the Killing time separation. The second
one uses the e... | [
{
"created": "Fri, 12 Jul 1996 20:26:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barvinsky",
"A.",
"",
"Lebedev Physics Institute"
],
[
"Kunstatter",
"G.",
"",
"University\n of Winnipeg"
]
] | Two arguments for the quantization of entropy for black holes in generic 2-D dilaton gravity are summarized. The first argument is based on reduced quantization of the only physical observables in the theory, namely the black hole mass and its conjugate momentum, the Killing time separation. The second one uses the exa... |
0812.3462 | Tomohiro Harada | Tomohiro Harada, Ken-ichi Nakao and Brien C. Nolan | Einstein-Rosen waves and the self-similarity hypothesis in cylindrical
symmetry | 21 pages, 10 figure files, revised version, accepted for publication
in Physical Review D, minor correction, erratum added | Phys.Rev.D80:024025,2009; Erratum-ibid.D80:109903,2009 | 10.1103/PhysRevD.80.024025 10.1103/PhysRevD.80.109903 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self-similarity hypothesis claims that in classical general relativity,
spherically symmetric solutions may naturally evolve to a self-similar form in
certain circumstances. In this context, the validity of the corresponding
hypothesis in nonspherical geometry is very interesting as there may exist
gravitational ... | [
{
"created": "Thu, 18 Dec 2008 05:38:53 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jun 2009 07:09:11 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Jul 2009 06:27:53 GMT",
"version": "v3"
},
{
"created": "Sun, 22 Nov 2009 07:10:31 GMT",
"version": "v4"
}
] | 2014-11-18 | [
[
"Harada",
"Tomohiro",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Nolan",
"Brien C.",
""
]
] | The self-similarity hypothesis claims that in classical general relativity, spherically symmetric solutions may naturally evolve to a self-similar form in certain circumstances. In this context, the validity of the corresponding hypothesis in nonspherical geometry is very interesting as there may exist gravitational wa... |
2207.08199 | Krishnakanta Bhattacharya | Krishnakanta Bhattacharya | A novel probe of Einstein-Hilbert action: Dynamic upgradation of metric
parameters | 28 Pages, To appear in GERG (in the memorial volume for Prof. Thanu
Padmanabhan) | Gen. Rel. Grav. 54, 81 (2022) | 10.1007/s10714-022-02958-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Hilbert (EH) action is peculiar in many ways. Some of the
Peculiar features have already been highlighted in literature. In the present
article, we have discussed some peculiar features of EH action which has not
been discussed earlier. It is well-known that there are several ways of
decomposing the EH a... | [
{
"created": "Sun, 17 Jul 2022 15:09:13 GMT",
"version": "v1"
}
] | 2022-08-05 | [
[
"Bhattacharya",
"Krishnakanta",
""
]
] | The Einstein-Hilbert (EH) action is peculiar in many ways. Some of the Peculiar features have already been highlighted in literature. In the present article, we have discussed some peculiar features of EH action which has not been discussed earlier. It is well-known that there are several ways of decomposing the EH act... |
1210.1566 | Gabor Kunstatter | Gabor Kunstatter, Hideki Maeda and Tim Taves | Hamiltonian dynamics of Lovelock black holes with spherical symmetry | 53 pages, including two major appendices; some typos fixed; version
published in CQG | Class.Quant.Grav. 30 (2013) 065002 | 10.1088/0264-9381/30/6/065002 | CECS-PHY-12/08 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically symmetric black holes in generic Lovelock gravity.
Using geometrodynamical variables we do a complete Hamiltonian analysis,
including derivation of the super-Hamiltonian and super-momentum constraints
and verification of suitable boundary conditions for asymptotically flat black
holes. Our ana... | [
{
"created": "Thu, 4 Oct 2012 19:59:08 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Oct 2012 14:14:30 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Feb 2013 01:53:28 GMT",
"version": "v3"
}
] | 2014-08-13 | [
[
"Kunstatter",
"Gabor",
""
],
[
"Maeda",
"Hideki",
""
],
[
"Taves",
"Tim",
""
]
] | We consider spherically symmetric black holes in generic Lovelock gravity. Using geometrodynamical variables we do a complete Hamiltonian analysis, including derivation of the super-Hamiltonian and super-momentum constraints and verification of suitable boundary conditions for asymptotically flat black holes. Our analy... |
1106.0970 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Comment on `Spinning loop black holes' [arXiv:1006.0232] | 2 pages, 1 figure | Class. Quantum Grav. 28 (2011) 148001 (2pp) | 10.1088/0264-9381/28/14/148001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the derivations and conclusions made in Caravelli and Modesto (2010
\textit{Class. Quantum Grav.} \textbf{27} 245022, arXiv:1006.0232) and show
that most of the analysis performed there is not valid.
| [
{
"created": "Mon, 6 Jun 2011 06:42:46 GMT",
"version": "v1"
}
] | 2011-06-07 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | We review the derivations and conclusions made in Caravelli and Modesto (2010 \textit{Class. Quantum Grav.} \textbf{27} 245022, arXiv:1006.0232) and show that most of the analysis performed there is not valid. |
2208.07379 | Macarena Lagos | Macarena Lagos and Lam Hui | Generation and propagation of nonlinear quasi-normal modes of a
Schwarzschild black hole | Version accepted in PRD | null | 10.1103/PhysRevD.107.044040 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the analysis of a binary black hole coalescence, it is necessary to
include gravitational self-interactions in order to describe the transition of
the gravitational wave signal from the merger to the ringdown stage. In this
paper we study the phenomenology of the generation and propagation of
nonlinearities in the... | [
{
"created": "Mon, 15 Aug 2022 18:00:03 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jan 2023 14:56:19 GMT",
"version": "v2"
}
] | 2023-03-08 | [
[
"Lagos",
"Macarena",
""
],
[
"Hui",
"Lam",
""
]
] | In the analysis of a binary black hole coalescence, it is necessary to include gravitational self-interactions in order to describe the transition of the gravitational wave signal from the merger to the ringdown stage. In this paper we study the phenomenology of the generation and propagation of nonlinearities in the r... |
0901.1121 | Tomas Liko | Tomas Liko | Isolated horizons, p-form matter fields, topology and the
black-hole/string correspondence principle | 11 pages; v2: figure added; references added; v3: introduction
shortened; to appear in Physical Review D; v4: typos corrected | Phys.Rev.D79:084038,2009 | 10.1103/PhysRevD.79.084038 | IGC-09/1-2 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the mechanics of D-dimensional isolated horizons (IHs) for Einstein
gravity in the presence of arbitrary p-form matter fields. This generalizes the
analysis of Copsey and Horowitz to non-stationary spacetimes and therefore the
local first law to include non-monopolar (dipole) charges. The only requirement
fo... | [
{
"created": "Thu, 8 Jan 2009 20:08:44 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Feb 2009 20:16:50 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Mar 2009 00:25:11 GMT",
"version": "v3"
},
{
"created": "Wed, 25 Mar 2009 16:06:34 GMT",
"version": "v4"
}
] | 2009-04-29 | [
[
"Liko",
"Tomas",
""
]
] | We study the mechanics of D-dimensional isolated horizons (IHs) for Einstein gravity in the presence of arbitrary p-form matter fields. This generalizes the analysis of Copsey and Horowitz to non-stationary spacetimes and therefore the local first law to include non-monopolar (dipole) charges. The only requirement for ... |
2101.03360 | Zaza Osmanov | G. Butbaia and Z.N. Osmanov | Fluid Dynamics in the Ellis Wormhole | 12 pages, 7 figures | null | 10.1142/S0218271821500723 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In the Ellis wormhole metrics we study characteristics of fluid dynamics and
the properties of linear sound waves. By implying the energy-momentum equation
and the continuity equation in the general relativistic manner we examine the
flow dynamics and solve the corresponding equations for a relatively simple
case - r... | [
{
"created": "Sat, 9 Jan 2021 13:50:46 GMT",
"version": "v1"
}
] | 2021-08-25 | [
[
"Butbaia",
"G.",
""
],
[
"Osmanov",
"Z. N.",
""
]
] | In the Ellis wormhole metrics we study characteristics of fluid dynamics and the properties of linear sound waves. By implying the energy-momentum equation and the continuity equation in the general relativistic manner we examine the flow dynamics and solve the corresponding equations for a relatively simple case - rad... |
2212.14396 | Hongguang Liu | Pietro Dona, Muxin Han, Hongguang Liu | Spinfoams and high performance computing | 33 pages, 11 figures. Invited chapter for the book "Handbook of
Quantum Gravity" (Eds. C. Bambi, L. Modesto and I.L. Shapiro, Springer
Singapore, expected in 2023) | Bambi, C., Modesto, L., Shapiro, I. (eds) Handbook of Quantum
Gravity. Springer, Singapore 2023 | 10.1007/978-981-19-3079-9_100-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical methods are a powerful tool for doing calculations in spinfoam
theory. We review the major frameworks available, their definition, and various
applications. We start from $\texttt{sl2cfoam-next}$, the state-of-the-art
library to efficiently compute EPRL spin foam amplitudes based on the booster
decompositio... | [
{
"created": "Thu, 29 Dec 2022 17:58:31 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Dona",
"Pietro",
""
],
[
"Han",
"Muxin",
""
],
[
"Liu",
"Hongguang",
""
]
] | Numerical methods are a powerful tool for doing calculations in spinfoam theory. We review the major frameworks available, their definition, and various applications. We start from $\texttt{sl2cfoam-next}$, the state-of-the-art library to efficiently compute EPRL spin foam amplitudes based on the booster decomposition.... |
2010.09751 | Wei Wei | Wei Wei, E. A. Huerta | Deep learning for gravitational wave forecasting of neutron star mergers | 10 pages, 4 figures | Physics Letters B 816 (2021) 136185 | 10.1016/j.physletb.2021.136185 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce deep learning time-series forecasting for gravitational wave
detection of binary neutron star mergers. This method enables the
identification of these signals in real advanced LIGO data up to 30 seconds
before merger. When applied to GW170817, our deep learning forecasting method
identifies the presence ... | [
{
"created": "Mon, 19 Oct 2020 18:00:39 GMT",
"version": "v1"
}
] | 2021-03-09 | [
[
"Wei",
"Wei",
""
],
[
"Huerta",
"E. A.",
""
]
] | We introduce deep learning time-series forecasting for gravitational wave detection of binary neutron star mergers. This method enables the identification of these signals in real advanced LIGO data up to 30 seconds before merger. When applied to GW170817, our deep learning forecasting method identifies the presence of... |
gr-qc/9912012 | Martin Rainer | Martin Rainer | Multidimensional Sigma-Model with Black Holes and p-Branes | 10 pages, latex & AMS symb., presented at ERE 99 (Bilbao) | null | null | null | gr-qc | null | The bosonic content of string theory in curved background of multidimensional
structure with p-branes has a systematic geometrical description as an
effective sigma-model of gravity in lower dimension (say 3+1) with additional
interacting dilatonic and p-brane fields. If the target-space is locally
symmetric, solutio... | [
{
"created": "Thu, 2 Dec 1999 16:48:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rainer",
"Martin",
""
]
] | The bosonic content of string theory in curved background of multidimensional structure with p-branes has a systematic geometrical description as an effective sigma-model of gravity in lower dimension (say 3+1) with additional interacting dilatonic and p-brane fields. If the target-space is locally symmetric, solutions... |
1006.5039 | Alfredo Lopez Ortega | A. Lopez-Ortega | Entropy spectrum of the D-dimensional massless topological black hole | 6 pages | Gen.Rel.Grav.42:2939-2945,2010 | 10.1007/s10714-010-1049-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are exact solutions to Einstein's equations with negative cosmological
constant that represent black holes whose event horizons are manifolds of
negative curvature, the so-called topological black holes. Among these
solutions there is one, the massless topological black hole, whose mass is
equal to zero. Hod pr... | [
{
"created": "Fri, 25 Jun 2010 18:45:21 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2010 01:32:42 GMT",
"version": "v2"
}
] | 2010-11-09 | [
[
"Lopez-Ortega",
"A.",
""
]
] | There are exact solutions to Einstein's equations with negative cosmological constant that represent black holes whose event horizons are manifolds of negative curvature, the so-called topological black holes. Among these solutions there is one, the massless topological black hole, whose mass is equal to zero. Hod prop... |
1708.02035 | Vladimir Khatsymovsky | V.M. Khatsymovsky | First order discrete Faddeev gravity at the strongly varying fields | 15 pages | Mod. Phys. Lett. A, Vol. 32, No. 35 (2017) 1750181 | 10.1142/S0217732317501814 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Faddeev formulation of general relativity (GR), which can be
characterized by a kind of $d$-dimensional tetrad (typically $d$=10) and a
non-Riemannian connection. This theory is invariant w. r. t. the global, but
not local, rotations in the $d$-dimensional space. There can be configurations
with a smo... | [
{
"created": "Mon, 7 Aug 2017 08:36:27 GMT",
"version": "v1"
}
] | 2017-11-09 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We consider the Faddeev formulation of general relativity (GR), which can be characterized by a kind of $d$-dimensional tetrad (typically $d$=10) and a non-Riemannian connection. This theory is invariant w. r. t. the global, but not local, rotations in the $d$-dimensional space. There can be configurations with a smoot... |
2205.02675 | Nicholas Loutrel | Nicholas Loutrel and Nicolas Yunes | Parity Violation in Spin-Precessing Binaries: Gravitational Waves from
the Inspiral of Black Holes in Dynamical Chern-Simons Gravity | 32 pages, 4 figures, published version | Phys. Rev. D 106, 064009 (2022) | 10.1103/PhysRevD.106.064009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin precession in compact binaries is intricately tuned to the multipole
structure of the underlying bodies. For black holes, violations of the no-hair
theorems induced by modifications to general relativity correct the precession
dynamics, which in turn imprints onto the amplitude and phase modulations of
the gravi... | [
{
"created": "Thu, 5 May 2022 14:30:27 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Sep 2022 10:00:20 GMT",
"version": "v2"
}
] | 2022-09-08 | [
[
"Loutrel",
"Nicholas",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Spin precession in compact binaries is intricately tuned to the multipole structure of the underlying bodies. For black holes, violations of the no-hair theorems induced by modifications to general relativity correct the precession dynamics, which in turn imprints onto the amplitude and phase modulations of the gravita... |
2401.06424 | Salvatore Capozziello | Salvatore Capozziello, Maurizio Capriolo, Shin'ichi Nojiri | Gravitational waves in $f(Q)$ non-metric gravity via geodesic deviation | 21 pages, accepted for publication in Phys. Lett. B | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate gravitational waves in the $f(Q)$ gravity, i.e., a geometric
theory of gravity described by a non-metric compatible connection, free from
torsion and curvature, known as symmetric-teleparallel gravity. We show that
$f(Q)$ gravity exhibits only two massless and tensor modes. Their polarizations
are tran... | [
{
"created": "Fri, 12 Jan 2024 07:41:18 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2024 09:17:44 GMT",
"version": "v2"
}
] | 2024-02-02 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Capriolo",
"Maurizio",
""
],
[
"Nojiri",
"Shin'ichi",
""
]
] | We investigate gravitational waves in the $f(Q)$ gravity, i.e., a geometric theory of gravity described by a non-metric compatible connection, free from torsion and curvature, known as symmetric-teleparallel gravity. We show that $f(Q)$ gravity exhibits only two massless and tensor modes. Their polarizations are transv... |
0902.0928 | Xin Zhang | Xin Zhang, Jingfei Zhang, Jinglei Cui, Li Zhang | Chaplygin inflation in loop quantum cosmology | 6 pages, accepted for publication in Mod. Phys. Lett. A | Mod.Phys.Lett.A24:1763-1773,2009 | 10.1142/S0217732309030436 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the inflationary universe in the context of a
Chaplygin gas equation of state within the framework of the effective theory of
loop quantum cosmology. Under the slow-roll approximation, we calculate the
primordial perturbations for this model. We give the general expressions of the
scalar spec... | [
{
"created": "Thu, 5 Feb 2009 15:33:16 GMT",
"version": "v1"
}
] | 2009-08-20 | [
[
"Zhang",
"Xin",
""
],
[
"Zhang",
"Jingfei",
""
],
[
"Cui",
"Jinglei",
""
],
[
"Zhang",
"Li",
""
]
] | In this paper we discuss the inflationary universe in the context of a Chaplygin gas equation of state within the framework of the effective theory of loop quantum cosmology. Under the slow-roll approximation, we calculate the primordial perturbations for this model. We give the general expressions of the scalar spectr... |
gr-qc/0510018 | Sanjeev Dhurandhar | Bhim Prasad Sarmah, S.K. Banerjee, S.V. Dhurandhar and J.V. Narlikar | On searches for gravitational waves from mini creation event by laser
interferometric detectors | null | Mon.Not.Roy.Astron.Soc.369:89-96,2006 | 10.1111/j.1365-2966.2006.10262.x | null | gr-qc | null | As an alternative view to the standard big bang cosmology the quasi-steady
state cosmology(QSSC) argues that the universe was not created in a single
great explosion; it neither had a beginning nor will it ever come to an end.
The creation of new matter in the universe is a regular feature occurring
through finite ex... | [
{
"created": "Wed, 5 Oct 2005 11:56:22 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sarmah",
"Bhim Prasad",
""
],
[
"Banerjee",
"S. K.",
""
],
[
"Dhurandhar",
"S. V.",
""
],
[
"Narlikar",
"J. V.",
""
]
] | As an alternative view to the standard big bang cosmology the quasi-steady state cosmology(QSSC) argues that the universe was not created in a single great explosion; it neither had a beginning nor will it ever come to an end. The creation of new matter in the universe is a regular feature occurring through finite expl... |
1503.00932 | Theodosios Christodoulakis | Petros A. Terzis, N. Dimakis, T. Christodoulakis, A. Paliathanasis, M.
Tsamparlis | Variational Contact Symmetries of Constraint Lagrangians | LaTex2e source file, 20 pages, no figures | null | 10.1016/j.geomphys.2015.12.003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The investigation of contact symmetries of re--parametrization invariant
Lagrangians of finite degrees of freedom and quadratic in the velocities is
presented. The main concern of the paper is those symmetry generators which
depend linearly in the velocities. A natural extension of the symmetry
generator along the la... | [
{
"created": "Tue, 3 Mar 2015 13:15:05 GMT",
"version": "v1"
}
] | 2016-02-17 | [
[
"Terzis",
"Petros A.",
""
],
[
"Dimakis",
"N.",
""
],
[
"Christodoulakis",
"T.",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Tsamparlis",
"M.",
""
]
] | The investigation of contact symmetries of re--parametrization invariant Lagrangians of finite degrees of freedom and quadratic in the velocities is presented. The main concern of the paper is those symmetry generators which depend linearly in the velocities. A natural extension of the symmetry generator along the laps... |
1701.08224 | Carlos Augusto Romero Filho | R. Avalos, F. Dahia, C. Romero | On the embedding of Weyl manifolds | 31 pages, Journal of Mathematical Physics, Volume 58, Issue 1 (2017) | null | 10.1063/1.4973751 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the possibility of extending different versions of the
Campbell-Magaard theorem, which have already been established in the context of
semi-Riemannian geometry, to the context of Weyl's geometry. We show that some
of the known results can be naturally extended to the new geometric scenario,
although new di... | [
{
"created": "Fri, 27 Jan 2017 23:58:30 GMT",
"version": "v1"
}
] | 2017-01-31 | [
[
"Avalos",
"R.",
""
],
[
"Dahia",
"F.",
""
],
[
"Romero",
"C.",
""
]
] | We discuss the possibility of extending different versions of the Campbell-Magaard theorem, which have already been established in the context of semi-Riemannian geometry, to the context of Weyl's geometry. We show that some of the known results can be naturally extended to the new geometric scenario, although new diff... |
gr-qc/0308009 | Sergio Dain | Sergio Dain | Trapped surfaces as boundaries for the constraint equations | 26 pages, 2 figures references updated, minor corrections | Class.Quant.Grav. 21 (2004) 555-574; Class.Quant.Grav. 22 (2005)
769-770 | 10.1088/0264-9381/22/4/C01 | null | gr-qc | null | Trapped surfaces are studied as inner boundary for the Einstein vacuum
constraint equations. The trapped surface condition can be written as a non
linear boundary condition for these equations. Under appropriate assumptions,
we prove existence and uniqueness of solutions in the exterior region for this
boundary value... | [
{
"created": "Mon, 4 Aug 2003 14:21:07 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Nov 2003 09:52:20 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Dain",
"Sergio",
""
]
] | Trapped surfaces are studied as inner boundary for the Einstein vacuum constraint equations. The trapped surface condition can be written as a non linear boundary condition for these equations. Under appropriate assumptions, we prove existence and uniqueness of solutions in the exterior region for this boundary value p... |
2406.10782 | Wei-Liang Qian | Guan-Ru Li, Wei-Liang Qian, Ramin G. Daghigh | On bifurcation and spectral instability of asymptotic quasinormal modes
in the modified P\"oschl-Teller effective potential | 41 pages, 7 figures, and 2 tables | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The P\"ochl-Teller effective potential mimics an asymptotically de Sitter
black hole bounded by an event horizon and a cosmological one. Owing to the
benefit of being analytically soluble, the asymptotic quasinormal modes in the
modified P\"oschl-Teller potential have been extensively explored in the
literature by va... | [
{
"created": "Sun, 16 Jun 2024 02:39:39 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Li",
"Guan-Ru",
""
],
[
"Qian",
"Wei-Liang",
""
],
[
"Daghigh",
"Ramin G.",
""
]
] | The P\"ochl-Teller effective potential mimics an asymptotically de Sitter black hole bounded by an event horizon and a cosmological one. Owing to the benefit of being analytically soluble, the asymptotic quasinormal modes in the modified P\"oschl-Teller potential have been extensively explored in the literature by vari... |
2104.03753 | Sergei Alexandrov | Sergei Alexandrov, Simone Speziale, Tom Zlosnik | Canonical structure of minimal varying $\Lambda$ theories | 38 pages | null | 10.1088/1361-6382/ac1852 | L2C:21-030 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Minimal varying $\Lambda$ theories are defined by an action built from the
Einstein-Cartan-Holst first order action for gravity with the cosmological
constant $\Lambda$ as an independent scalar field, and supplemented by the
Euler and Pontryagin densities multiplied by $1/\Lambda$. We identify the
canonical structure... | [
{
"created": "Thu, 8 Apr 2021 13:15:08 GMT",
"version": "v1"
}
] | 2021-08-03 | [
[
"Alexandrov",
"Sergei",
""
],
[
"Speziale",
"Simone",
""
],
[
"Zlosnik",
"Tom",
""
]
] | Minimal varying $\Lambda$ theories are defined by an action built from the Einstein-Cartan-Holst first order action for gravity with the cosmological constant $\Lambda$ as an independent scalar field, and supplemented by the Euler and Pontryagin densities multiplied by $1/\Lambda$. We identify the canonical structure o... |
gr-qc/0403101 | Chiang-Mei Chen | James M. Nester, Fei-Hong Ho and Chiang-Mei Chen | Quasilocal Center-of-Mass for Teleparallel Gravity | 12 pages, to appear in the proceedings of the 10th Marcel Grossman
meeting (Rio de Janeiro, 2003) | null | 10.1142/9789812704030_0138 | null | gr-qc | null | Asymptotically flat gravitating systems have 10 conserved quantities, which
lack proper local densities. It has been hoped that the teleparallel equivalent
of Einstein's GR (TEGR, aka GR${}_{||}$) could solve this gravitational
energy-momentum localization problem. Meanwhile a new idea: quasilocal
quantities, has com... | [
{
"created": "Thu, 25 Mar 2004 10:42:06 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Nester",
"James M.",
""
],
[
"Ho",
"Fei-Hong",
""
],
[
"Chen",
"Chiang-Mei",
""
]
] | Asymptotically flat gravitating systems have 10 conserved quantities, which lack proper local densities. It has been hoped that the teleparallel equivalent of Einstein's GR (TEGR, aka GR${}_{||}$) could solve this gravitational energy-momentum localization problem. Meanwhile a new idea: quasilocal quantities, has come ... |
1903.07934 | Kourosh Nozari | Kourosh Nozari and Parham Dehghani | The role of an invariant IR cutoff in late time cosmological dynamics | 13 pages, one figure, accepted for publication in Phys. Lett. B | null | 10.1016/j.physletb.2019.03.032 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the role of an invariant infra-red cutoff in the late time
cosmological dynamics. This low energy cutoff originates from the existence of
a minimal measurable uncertainty as a result of the curvature of background
manifold, and can be encoded in an extended uncertainty relation. Inspired by
black hole entrop... | [
{
"created": "Tue, 19 Mar 2019 10:59:05 GMT",
"version": "v1"
}
] | 2019-05-01 | [
[
"Nozari",
"Kourosh",
""
],
[
"Dehghani",
"Parham",
""
]
] | We study the role of an invariant infra-red cutoff in the late time cosmological dynamics. This low energy cutoff originates from the existence of a minimal measurable uncertainty as a result of the curvature of background manifold, and can be encoded in an extended uncertainty relation. Inspired by black hole entropy-... |
2001.03571 | Maria Okounkova | Maria Okounkova | Numerical relativity simulation of GW150914 in Einstein dilaton
Gauss-Bonnet gravity | 6 pages, 5 figures | Phys. Rev. D 102, 084046 (2020) | 10.1103/PhysRevD.102.084046 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A present challenge in testing general relativity (GR) with binary black hole
gravitational wave detections is the inability to perform model-dependent tests
due to the lack of merger waveforms in beyond-GR theories. In this study, we
produce the first numerical relativity binary black hole gravitational waveform
in ... | [
{
"created": "Fri, 10 Jan 2020 17:33:45 GMT",
"version": "v1"
}
] | 2020-11-04 | [
[
"Okounkova",
"Maria",
""
]
] | A present challenge in testing general relativity (GR) with binary black hole gravitational wave detections is the inability to perform model-dependent tests due to the lack of merger waveforms in beyond-GR theories. In this study, we produce the first numerical relativity binary black hole gravitational waveform in Ei... |
0904.1190 | K G Arun | K G Arun, Clifford M Will | Bounding the mass of the graviton with gravitational waves: Effect of
higher harmonics in gravitational waveform templates | 12 pages, 4 figures. Minor changes to the text and the plots. Matches
the published CQG version | Class.Quant.Grav.26:155002,2009 | 10.1088/0264-9381/26/15/155002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations by laser interferometric detectors of gravitational waves from
inspiraling compact binary systems can be used to search for a dependence of
the waves' propagation speed on wavelength, and thereby to bound the mass or
Compton wavelength of a putative graviton. We study the effect of including
higher harmo... | [
{
"created": "Tue, 7 Apr 2009 18:16:19 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2009 19:55:41 GMT",
"version": "v2"
}
] | 2009-07-22 | [
[
"Arun",
"K G",
""
],
[
"Will",
"Clifford M",
""
]
] | Observations by laser interferometric detectors of gravitational waves from inspiraling compact binary systems can be used to search for a dependence of the waves' propagation speed on wavelength, and thereby to bound the mass or Compton wavelength of a putative graviton. We study the effect of including higher harmoni... |
2005.12410 | Sanjar Shaymatov | Sanjar Shaymatov, Jaroslav Vrba, Daniele Malafarina, Bobomurat
Ahmedov, Zden\v{e}k Stuchl\'ik | Charged particle and epicyclic motions around $4D$ Einstein-Gauss-Bonnet
black hole immersed in an external magnetic field | 36 pages, 8 figures, 1 table | Physics of the Dark Universe 30, 100648 (2020) | 10.1016/j.dark.2020.100648 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate particle motion in the vicinity of a $4D$
Einstein-Gauss-Bonnet (EGB) black hole immersed in external asymptotically
uniform magnetic field. It is well known that magnetic fields can strongly
affect charged particle motion in the black hole vicinity due to the Lorenz
force. We find that the presence of... | [
{
"created": "Mon, 25 May 2020 21:22:16 GMT",
"version": "v1"
},
{
"created": "Thu, 28 May 2020 14:42:20 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Jul 2020 14:21:05 GMT",
"version": "v3"
}
] | 2020-07-03 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Vrba",
"Jaroslav",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | We investigate particle motion in the vicinity of a $4D$ Einstein-Gauss-Bonnet (EGB) black hole immersed in external asymptotically uniform magnetic field. It is well known that magnetic fields can strongly affect charged particle motion in the black hole vicinity due to the Lorenz force. We find that the presence of t... |
1606.08980 | Kiyoshi Shiraishi | Nahomi Kan (NIT, Gifu College), Takuya Maki (Japan Women's College of
Physical Education) and Kiyoshi Shiraishi (Yamaguchi University) | GR-GSG Hybrid Gravity | 21 pages, 10 figures. Reference added | Phys. Rev. D 94, 084001 (2016) | 10.1103/PhysRevD.94.084001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a model of gravity in which a General Relativity metric tensor and
an effective metric generated from a single scalar formulated in Geometric
Scalar Gravity are mixed. We show that the model yields the exact Schwarzschild
solution, along with accelerating behavior of scale factors in cosmological
solutions... | [
{
"created": "Wed, 29 Jun 2016 07:01:49 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jul 2016 09:20:02 GMT",
"version": "v2"
}
] | 2016-10-12 | [
[
"Kan",
"Nahomi",
"",
"NIT, Gifu College"
],
[
"Maki",
"Takuya",
"",
"Japan Women's College of\n Physical Education"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | We propose a model of gravity in which a General Relativity metric tensor and an effective metric generated from a single scalar formulated in Geometric Scalar Gravity are mixed. We show that the model yields the exact Schwarzschild solution, along with accelerating behavior of scale factors in cosmological solutions. |
2011.05542 | Yan-Gang Miao | Xin-Chang Cai, Yan-Gang Miao | High-dimensional Schwarzschild black holes in scalar-tensor-vector
gravity theory | v1: 18 pages, 6 figures, 4 tables; v2: clarifications and references
added; v3: 19 pages, final version to appear in European Physical Journal C | European Physical Journal C 81, 559 (2021) | 10.1140/epjc/s10052-021-09351-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a high-dimensional Schwarzschild black hole solution in the
scalar-tensor-vector gravity (STVG), and then analyze the influence of
parameter $\alpha$ associated with a deviation of the STVG theory from General
Relativity on event horizons and Hawking temperature. We calculate the
quasinormal mode frequencie... | [
{
"created": "Wed, 11 Nov 2020 04:46:59 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Dec 2020 14:10:38 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Jun 2021 00:41:34 GMT",
"version": "v3"
}
] | 2021-07-05 | [
[
"Cai",
"Xin-Chang",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We obtain a high-dimensional Schwarzschild black hole solution in the scalar-tensor-vector gravity (STVG), and then analyze the influence of parameter $\alpha$ associated with a deviation of the STVG theory from General Relativity on event horizons and Hawking temperature. We calculate the quasinormal mode frequencies ... |
2308.04713 | Mudassar Sabir | Arshad Ali, Ya-Peng Hu, Mudassar Sabir, Taotao Sui | On the gauge dependence of scalar induced secondary gravitational waves
during radiation and matter domination eras | 19 pages, 6 figures, SCPMA in press | Sci.China Phys.Mech.Astron. 66 (2023) 290411 | 10.1007/s11433-022-2118-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the vital issue of gauge dependence in the scalar-induced
secondary gravitational waves (SIGWs), focusing on the radiation domination
(RD) and matter domination (MD) eras. The energy density spectrum is the main
physical observable in such induced gravitational waves. For various gauge
choices, there has b... | [
{
"created": "Wed, 9 Aug 2023 05:11:53 GMT",
"version": "v1"
}
] | 2023-08-10 | [
[
"Ali",
"Arshad",
""
],
[
"Hu",
"Ya-Peng",
""
],
[
"Sabir",
"Mudassar",
""
],
[
"Sui",
"Taotao",
""
]
] | We revisit the vital issue of gauge dependence in the scalar-induced secondary gravitational waves (SIGWs), focusing on the radiation domination (RD) and matter domination (MD) eras. The energy density spectrum is the main physical observable in such induced gravitational waves. For various gauge choices, there has bee... |
2009.09820 | Andras Laszlo | Andras Laszlo and Zoltan Zimboras | Clarification on theoretical predictions for general relativistic
effects in frozen spin storage rings | Contribution to Gribov-90 memorial volume | Gribov-90 Memorial Volume (2021) | 10.1142/9789811238406_0016 | null | gr-qc hep-ex hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic moments of particles carry important information on their
internal structure, as well as on the structure of the effective Lagrangian
describing their underlying field theory. One of the cleanest observable of
such kind is the electric dipole moment (EDM), since Standard Model estimates
would imply ve... | [
{
"created": "Mon, 21 Sep 2020 12:46:04 GMT",
"version": "v1"
}
] | 2021-06-01 | [
[
"Laszlo",
"Andras",
""
],
[
"Zimboras",
"Zoltan",
""
]
] | Electromagnetic moments of particles carry important information on their internal structure, as well as on the structure of the effective Lagrangian describing their underlying field theory. One of the cleanest observable of such kind is the electric dipole moment (EDM), since Standard Model estimates would imply very... |
2201.07693 | Martin Bojowald | Martin Bojowald | Abelianized structures in spherically symmetric hypersurface
deformations | 14 pages, v2: title change and more focused on hypersurface
deformations | Universe 8 (2022) 184 | 10.3390/universe8030184 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In canonical gravity, general covariance is implemented by
hypersurface-deformation symmetries on phase space. The different versions of
hypersurface deformations required for full covariance have complicated
interplays with one another, governed by non-Abelian brackets with structure
functions. For spherically symme... | [
{
"created": "Wed, 19 Jan 2022 16:24:23 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Mar 2022 17:57:42 GMT",
"version": "v2"
}
] | 2022-05-25 | [
[
"Bojowald",
"Martin",
""
]
] | In canonical gravity, general covariance is implemented by hypersurface-deformation symmetries on phase space. The different versions of hypersurface deformations required for full covariance have complicated interplays with one another, governed by non-Abelian brackets with structure functions. For spherically symmetr... |
2105.07573 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel, Sergio E. Jor\'as, Ribamar R. R. Reis and Jos\'e D.
V. Arba\~nil | Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor:
Hydrostatic equilibrium and asteroseismology | 21 pages, 8 figures | JCAP 08 (2021) 055 | 10.1088/1475-7516/2021/08/055 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the equilibrium and radial stability of spherically symmetric
relativistic stars, considering a polytropic equation of state (EoS), within
the framework of $f(R,T)$ gravity with a conservative energy-momentum tensor.
Both modified stellar structure equations and Chandrasekhar's pulsation
equations are ... | [
{
"created": "Mon, 17 May 2021 01:46:12 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 2021 09:04:51 GMT",
"version": "v2"
}
] | 2021-08-26 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Jorás",
"Sergio E.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Arbañil",
"José D. V.",
""
]
] | We investigate the equilibrium and radial stability of spherically symmetric relativistic stars, considering a polytropic equation of state (EoS), within the framework of $f(R,T)$ gravity with a conservative energy-momentum tensor. Both modified stellar structure equations and Chandrasekhar's pulsation equations are de... |
2404.18608 | P. B. Covas | P. B. Covas, R. Prix, J. Martins | A new framework to follow up candidates from continuous
gravitational-wave searches | 16 pages, 13 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Searches for continuous gravitational waves from unknown neutron stars are
limited in sensitivity due to their high computational cost. For this reason,
developing new methods or improving existing ones can increase the probability
of making a detection. In this paper we present a new framework that uses MCMC
or nest... | [
{
"created": "Mon, 29 Apr 2024 11:22:45 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Covas",
"P. B.",
""
],
[
"Prix",
"R.",
""
],
[
"Martins",
"J.",
""
]
] | Searches for continuous gravitational waves from unknown neutron stars are limited in sensitivity due to their high computational cost. For this reason, developing new methods or improving existing ones can increase the probability of making a detection. In this paper we present a new framework that uses MCMC or nested... |
2107.00010 | Scott Melville | Anne-Christine Davis and Scott Melville | Scalar Fields Near Compact Objects: Resummation versus UV Completion | 34+12 pages, 6 figures | null | 10.1088/1475-7516/2021/11/012 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Low-energy effective field theories containing a light scalar field are used
extensively in cosmology, but often there is a tension between embedding such
theories in a healthy UV completion and achieving a phenomenologically viable
screening mechanism in the IR. Here, we identify the range of interaction
couplings w... | [
{
"created": "Wed, 30 Jun 2021 18:00:01 GMT",
"version": "v1"
}
] | 2021-11-17 | [
[
"Davis",
"Anne-Christine",
""
],
[
"Melville",
"Scott",
""
]
] | Low-energy effective field theories containing a light scalar field are used extensively in cosmology, but often there is a tension between embedding such theories in a healthy UV completion and achieving a phenomenologically viable screening mechanism in the IR. Here, we identify the range of interaction couplings whi... |
2103.02688 | Jo\~ao Cavedagne Lobato | Jo\~ao C. Lobato, Isabela S. Matos, Lucas T. Santana, Ribamar R. R.
Reis and Maur\'icio O. Calv\~ao | Influence of gravitational waves upon light. Part II. Electric field
propagation and interference pattern in a gravitational wave detector | 23 pages, 2 figures, 1 table. To be submitted to JCAP | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this second article of the series, we apply our recently derived equation
for the electric field propagation along light rays [arXiv:2004.03496], valid
on the electromagnetic geometrical optics limit, to the special case of a toy
interferometer used to detect gravitational waves in a flat background. Such an
equat... | [
{
"created": "Wed, 3 Mar 2021 21:10:56 GMT",
"version": "v1"
}
] | 2021-03-05 | [
[
"Lobato",
"João C.",
""
],
[
"Matos",
"Isabela S.",
""
],
[
"Santana",
"Lucas T.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Calvão",
"Maurício O.",
""
]
] | In this second article of the series, we apply our recently derived equation for the electric field propagation along light rays [arXiv:2004.03496], valid on the electromagnetic geometrical optics limit, to the special case of a toy interferometer used to detect gravitational waves in a flat background. Such an equatio... |
1506.04252 | Richard Woodard | R. P. Woodard (University of Florida) | Some Inconvenient Truths | 14 pages, uses LaTeX2e | null | null | UFIFT-QG-15-04 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent paper by Fr\"ob employs the linearized Weyl-Weyl correlator to
construct the tensor power spectrum. Although his purpose was to argue that
infrared divergences and secular growth in the graviton propagator are gauge
artefacts, a closer examination of the problem leads to the opposite
conclusion. The analogie... | [
{
"created": "Sat, 13 Jun 2015 11:16:41 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | A recent paper by Fr\"ob employs the linearized Weyl-Weyl correlator to construct the tensor power spectrum. Although his purpose was to argue that infrared divergences and secular growth in the graviton propagator are gauge artefacts, a closer examination of the problem leads to the opposite conclusion. The analogies ... |
1810.02581 | LSC P&P Committee | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams,
P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, B. Agarwal, M. Agathos,
K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B.
Allen, G. Allen, A... | Search for gravitational waves from a long-lived remnant of the binary
neutron star merger GW170817 | main paper: 9 pages and 3 figures; total with appendices: 24 pages
and 9 figures. Full UL tables available as MRT ancillary files | The Astrophysical Journal 875:160 (2019) | 10.3847/1538-4357/ab0f3d | LIGO-P1800195 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One unanswered question about the binary neutron star coalescence GW170817 is
the nature of its post-merger remnant. A previous search for post-merger
gravitational waves targeted high-frequency signals from a possible neutron
star remnant with a maximum signal duration of 500 s. Here we revisit the
neutron star remn... | [
{
"created": "Fri, 5 Oct 2018 09:31:51 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Oct 2019 14:34:41 GMT",
"version": "v2"
}
] | 2019-10-07 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K.",
... | One unanswered question about the binary neutron star coalescence GW170817 is the nature of its post-merger remnant. A previous search for post-merger gravitational waves targeted high-frequency signals from a possible neutron star remnant with a maximum signal duration of 500 s. Here we revisit the neutron star remnan... |
gr-qc/9403038 | Sherry Robinson | Abhay Ashtekar | Overview and Outlook | 33 pages, plain TEX, CGPG-94/1-1 | null | 10.1007/3-540-58339-4_24 | null | gr-qc | null | This report is based on the talk given by the author in the concluding
session of the workshop on Canonical Methods in Classical and Quantum General
Relativity, held a Bad-Honef, Germany, in September 93. It contains an
assessment of the canonical approach in general, an overview of recent
developments within the can... | [
{
"created": "Fri, 18 Mar 1994 20:59:19 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Ashtekar",
"Abhay",
""
]
] | This report is based on the talk given by the author in the concluding session of the workshop on Canonical Methods in Classical and Quantum General Relativity, held a Bad-Honef, Germany, in September 93. It contains an assessment of the canonical approach in general, an overview of recent developments within the canon... |
gr-qc/9607018 | Kim Sang Pyo | Sang Pyo Kim, Sung Ku Kim, Kwang-Sup Soh, Jae Hyung Yee | The Effect of Brick Walls on the Black Hole Radiation | 8 pages, no figures, Revtex | J.KoreanPhys.Soc.31:357-359,1997 | null | SNUTP 96-069, YUMS 96-15 | gr-qc | null | In order to understand the physical effect of the brick wall boundary
condition, we compute the distribution of the zero-point energy of the massless
scalar fields minimally coupled to the Schwarzschild and Reissner-Nordstr\"{o}m
black hole backgrounds. We find that the black hole radiation spectrum depends
on the po... | [
{
"created": "Sun, 7 Jul 1996 13:46:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kim",
"Sang Pyo",
""
],
[
"Kim",
"Sung Ku",
""
],
[
"Soh",
"Kwang-Sup",
""
],
[
"Yee",
"Jae Hyung",
""
]
] | In order to understand the physical effect of the brick wall boundary condition, we compute the distribution of the zero-point energy of the massless scalar fields minimally coupled to the Schwarzschild and Reissner-Nordstr\"{o}m black hole backgrounds. We find that the black hole radiation spectrum depends on the posi... |
1108.3254 | William Joseph Weber | R. Dolesi, M. Hueller, D. Nicolodi, D. Tombolato, S. Vitale, P. J.
Wass, W. J. Weber, M. Evans, P. Fritschel, R. Weiss, J. H. Gundlach, C. A.
Hagedorn, S. Schlamminger, G. Ciani, and A. Cavalleri | Brownian force noise from molecular collisions and the sensitivity of
advanced gravitational wave observatories | 13 pages with 9 figures (fixed typos found in proofs) | Physical Review D 84, 063007 (2011) | 10.1103/PhysRevD.84.063007 | null | gr-qc astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an analysis of Brownian force noise from residual gas damping of
reference test masses as a fundamental sensitivity limit in small force
experiments. The resulting acceleration noise increases significantly when the
distance of the test mass to the surrounding experimental apparatus is smaller
than the dim... | [
{
"created": "Tue, 16 Aug 2011 14:41:53 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2011 15:02:59 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Dolesi",
"R.",
""
],
[
"Hueller",
"M.",
""
],
[
"Nicolodi",
"D.",
""
],
[
"Tombolato",
"D.",
""
],
[
"Vitale",
"S.",
""
],
[
"Wass",
"P. J.",
""
],
[
"Weber",
"W. J.",
""
],
[
"Evans",
"M.",
... | We present an analysis of Brownian force noise from residual gas damping of reference test masses as a fundamental sensitivity limit in small force experiments. The resulting acceleration noise increases significantly when the distance of the test mass to the surrounding experimental apparatus is smaller than the dimen... |
gr-qc/0209039 | Massimo Tinto | Thomas A. Prince, Massimo Tinto, Shane L. Larson, and J.W. Armstrong | The LISA Optimal Sensitivity | Equation (20) of the previous version contained a typographical
error, which now has been corrected. The final results of the paper are
unchanged | Phys.Rev. D66 (2002) 122002 | 10.1103/PhysRevD.66.122002 | null | gr-qc | null | The multiple Doppler readouts available on the Laser Interferometer Space
Antenna (LISA) permit simultaneous formation of several interferometric
observables. All these observables are independent of laser frequency
fluctuations and have different couplings to gravitational waves and to the
various LISA instrumental ... | [
{
"created": "Thu, 12 Sep 2002 06:45:36 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jun 2003 05:04:15 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Prince",
"Thomas A.",
""
],
[
"Tinto",
"Massimo",
""
],
[
"Larson",
"Shane L.",
""
],
[
"Armstrong",
"J. W.",
""
]
] | The multiple Doppler readouts available on the Laser Interferometer Space Antenna (LISA) permit simultaneous formation of several interferometric observables. All these observables are independent of laser frequency fluctuations and have different couplings to gravitational waves and to the various LISA instrumental no... |
1405.2824 | Tiberiu Harko | Tiberiu Harko, Chun Sing Leung, Gabriela Mocanu | Generalized Langevin equation with colored noise description of the
stochastic oscillations of accretion disks | 17 pages, 10 figures, accepted for publication in EPJC | Eur. Phys. J. C (2014) 74:2900 | 10.1140/epjc/s10052-014-2900-9 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a description of the stochastic oscillations of the general
relativistic accretion disks around compact astrophysical objects interacting
with their external medium based on a generalized Langevin equation with
colored noise, which accounts for the general memory and retarded effects of
the frictional for... | [
{
"created": "Mon, 12 May 2014 16:28:49 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Harko",
"Tiberiu",
""
],
[
"Leung",
"Chun Sing",
""
],
[
"Mocanu",
"Gabriela",
""
]
] | We consider a description of the stochastic oscillations of the general relativistic accretion disks around compact astrophysical objects interacting with their external medium based on a generalized Langevin equation with colored noise, which accounts for the general memory and retarded effects of the frictional force... |
2305.17307 | Sijie Gao | Minghao Xia and Sijie Gao | General Proof of the Tolman law | 4 pages, no figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Tolman proposed that the proper temper $T$ of a static self-gravitating fluid
in thermodynamic equilibrium satisfies the relation $\chi T=constant$, where
$\chi$ is the redshift factor of the spacetime. The Tolman law has been proven
for radiation in stationary spacetimes and for perfect fluids in stationary,
asymoto... | [
{
"created": "Fri, 26 May 2023 23:51:30 GMT",
"version": "v1"
}
] | 2023-05-30 | [
[
"Xia",
"Minghao",
""
],
[
"Gao",
"Sijie",
""
]
] | Tolman proposed that the proper temper $T$ of a static self-gravitating fluid in thermodynamic equilibrium satisfies the relation $\chi T=constant$, where $\chi$ is the redshift factor of the spacetime. The Tolman law has been proven for radiation in stationary spacetimes and for perfect fluids in stationary, asymototi... |
2405.16689 | Tuan Do | Tuan Q. Do | A note on the area of event horizon of Kleinian black hole | 8 pages, 3 figures. Comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the area of event horizon of Kleinian black hole is
infinite due to the fact that its event horizon is not a sphere but a
hyperboloid. Therefore, the usual interpretations of Schwarzschild black hole
might not be applicable to the Kleinian black hole.
| [
{
"created": "Sun, 26 May 2024 20:50:29 GMT",
"version": "v1"
}
] | 2024-05-28 | [
[
"Do",
"Tuan Q.",
""
]
] | We point out that the area of event horizon of Kleinian black hole is infinite due to the fact that its event horizon is not a sphere but a hyperboloid. Therefore, the usual interpretations of Schwarzschild black hole might not be applicable to the Kleinian black hole. |
1112.2829 | Mohamed Ahmed | M. A. Ahmed | On f(R) theories in two-dimensional spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, theories in which the Einstien-Hilbert lagrangian is
replaced by a function f(R) of the Ricci Scalar have been extensively studied
in four-dimensional spacetime. In this work we carry out an analysis of such
theories in two-dimensional spacetime with focus on cosmological implications.
Solutions to t... | [
{
"created": "Tue, 13 Dec 2011 09:26:33 GMT",
"version": "v1"
}
] | 2011-12-14 | [
[
"Ahmed",
"M. A.",
""
]
] | In recent years, theories in which the Einstien-Hilbert lagrangian is replaced by a function f(R) of the Ricci Scalar have been extensively studied in four-dimensional spacetime. In this work we carry out an analysis of such theories in two-dimensional spacetime with focus on cosmological implications. Solutions to the... |
1702.02787 | Titus K Mathew | Krishna P B and Titus K Mathew | Holographic equipartition and the maximization of entropy | 16 pages, 4 figures | Phys. Rev. D 96, 063513 (2017) | 10.1103/PhysRevD.96.063513 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | \begin{abstract} The accelerated expansion of the universe can be interpreted
as a tendency to satisfy the holographic equipartition. It can be expressed by
a simple law, $\Delta V = \Delta t\left(N_{surf}-\epsilon N_{bulk}\right),$
where $V$ is the Hubble volume in Plank units, $t$ is the cosmic time plank
units and... | [
{
"created": "Thu, 9 Feb 2017 11:31:30 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Aug 2017 13:22:59 GMT",
"version": "v2"
}
] | 2017-09-20 | [
[
"B",
"Krishna P",
""
],
[
"Mathew",
"Titus K",
""
]
] | \begin{abstract} The accelerated expansion of the universe can be interpreted as a tendency to satisfy the holographic equipartition. It can be expressed by a simple law, $\Delta V = \Delta t\left(N_{surf}-\epsilon N_{bulk}\right),$ where $V$ is the Hubble volume in Plank units, $t$ is the cosmic time plank units and $... |
1703.01158 | Markus B. Fr\"ob | Markus B. Fr\"ob, Thomas-Paul Hack, Atsushi Higuchi | Compactly supported linearised observables in single-field inflation | 33 pages, new section on the relation between our compactly supported
observables and the scalar and tensor power spectra, agrees with published
version up to appendix E | JCAP 07 (2017) 043 | 10.1088/1475-7516/2017/07/043 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the gauge-invariant observables constructed by smearing the
graviton and inflaton fields by compactly supported tensors at linear order in
general single-field inflation. These observables correspond to gauge-invariant
quantities that can be measured locally. In particular, we show that these
observabl... | [
{
"created": "Fri, 3 Mar 2017 13:52:41 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2017 13:54:55 GMT",
"version": "v2"
}
] | 2017-09-01 | [
[
"Fröb",
"Markus B.",
""
],
[
"Hack",
"Thomas-Paul",
""
],
[
"Higuchi",
"Atsushi",
""
]
] | We investigate the gauge-invariant observables constructed by smearing the graviton and inflaton fields by compactly supported tensors at linear order in general single-field inflation. These observables correspond to gauge-invariant quantities that can be measured locally. In particular, we show that these observables... |
1211.4586 | Sam Dolan Dr | Sam R. Dolan and Leor Barack | Self-force via $m$-mode regularization and 2+1D evolution: III.
Gravitational field on Schwarzschild spacetime | 56 pages, 17 figures | Phys.Rev.D87,084066(2013) | 10.1103/PhysRevD.87.084066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the third in a series of papers aimed at developing a practical
time-domain method for self-force calculations in Kerr spacetime. The key
elements of the method are (i) removal of a singular part of the perturbation
field with a suitable analytic "puncture", (ii) decomposition of the
perturbation equations in... | [
{
"created": "Mon, 19 Nov 2012 21:01:15 GMT",
"version": "v1"
}
] | 2013-05-13 | [
[
"Dolan",
"Sam R.",
""
],
[
"Barack",
"Leor",
""
]
] | This is the third in a series of papers aimed at developing a practical time-domain method for self-force calculations in Kerr spacetime. The key elements of the method are (i) removal of a singular part of the perturbation field with a suitable analytic "puncture", (ii) decomposition of the perturbation equations in a... |
2111.14809 | Fred Tomlinson | Fred Tomlinson | Five-dimensional electrostatic black holes in a background field | 21 pages | null | 10.1088/1361-6382/ac5814 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider $5$ dimensional electrostatic solutions to Einstein-Maxwell
gravity with $2$ commuting spacelike Killing fields. Taking two distinct
reductions from $5$ dimensions to a $3$ dimensional base space, we write the
Einstein-Maxwell equations using some axially symmetric functions on
$\mathbb{R}^3$. These equat... | [
{
"created": "Mon, 29 Nov 2021 18:55:14 GMT",
"version": "v1"
}
] | 2022-06-22 | [
[
"Tomlinson",
"Fred",
""
]
] | We consider $5$ dimensional electrostatic solutions to Einstein-Maxwell gravity with $2$ commuting spacelike Killing fields. Taking two distinct reductions from $5$ dimensions to a $3$ dimensional base space, we write the Einstein-Maxwell equations using some axially symmetric functions on $\mathbb{R}^3$. These equatio... |
gr-qc/0604070 | Mikhail Kalinin | M.I. Kalinin and V.N. Melnikov | On the cosmological constant in quantum cosmology | This paper was published originally in "Problems of Gravitational
Theory and Particle Theory", VNIIFTRI Proceedings, Moscow, 1972. v. 16(46),
pp. 43-48 (in Russian). The English version was published in the journal
"Gravitation & Cosmology" in 2003 | Grav.Cosmol.9:227-228,2003 | null | null | gr-qc | null | Quantization of a dust-like closed isotropic cosmological model with a
cosmological constant is realized by the method of B. DeWitt \cite{1}. It is
shown that such quantization leads to interesting results, in particular, to a
finite lifetime of the system, and appearance of the Universe in our world as
penetration v... | [
{
"created": "Mon, 17 Apr 2006 09:12:28 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Kalinin",
"M. I.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | Quantization of a dust-like closed isotropic cosmological model with a cosmological constant is realized by the method of B. DeWitt \cite{1}. It is shown that such quantization leads to interesting results, in particular, to a finite lifetime of the system, and appearance of the Universe in our world as penetration via... |
2008.04951 | Andre Landulfo | Joao Lucas Miqueleto and Andre G. S. Landulfo | Exact Renormalization Group, Entanglement Entropy, and Black Hole
Entropy | 13 pages, 1 figure | Phys. Rev. D 103, 045012 (2021) | 10.1103/PhysRevD.103.045012 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of black hole physics revealed a fundamental connection between
thermodynamics, quantum mechanics, and gravity. Today, it is known that black
holes are thermodynamical objects with well-defined temperature and entropy.
Although black hole radiance gives us the mechanism from which we can associate
a well-de... | [
{
"created": "Tue, 11 Aug 2020 18:34:45 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Miqueleto",
"Joao Lucas",
""
],
[
"Landulfo",
"Andre G. S.",
""
]
] | The study of black hole physics revealed a fundamental connection between thermodynamics, quantum mechanics, and gravity. Today, it is known that black holes are thermodynamical objects with well-defined temperature and entropy. Although black hole radiance gives us the mechanism from which we can associate a well-defi... |
gr-qc/0109066 | Margarita Tchitchikina | O.A.Khrustalev, M.V.Tchitchikina (Moscow State University) | Quantum Gravity on the Classical Background: Group Analysis, Part II | 10 pages | null | null | null | gr-qc | null | Quantization of gravitational field in the neighbourhood of arbitrary
nontrivial solution of Einstein equations is considered, the 2nd order of
perturbation theory is calculated. The expression for quantum corrections of
the field operator and explicit view of Hamiltonian are represented.
| [
{
"created": "Wed, 19 Sep 2001 14:06:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Khrustalev",
"O. A.",
"",
"Moscow State University"
],
[
"Tchitchikina",
"M. V.",
"",
"Moscow State University"
]
] | Quantization of gravitational field in the neighbourhood of arbitrary nontrivial solution of Einstein equations is considered, the 2nd order of perturbation theory is calculated. The expression for quantum corrections of the field operator and explicit view of Hamiltonian are represented. |
gr-qc/9702053 | Alexander L. Gromov | Alexander Gromov (St-Petersburg State Thechnical University, Russia)
V. Perepelovsky (St-Petersburg ElectroTechnical University, Russia) | Quasi-Two-Dimentional Modeling of the Self Gravitating Gas | LaTeX,6 pages,Invited talk at the Cosmion'94 Int. Conf. 1994;
Published in: Cosmoparticle physics. 1. Proceedings of 1 International
conference on cosmoparticle physics "Cosmion-94", dedicated to 80 Anniversary
of Ya.B.Zedovich and 5 Memorial of A.D.Sakharov. Eds M.Yu.Khlopov,
M.E.Prokhorov, A.A.Starobinsky, J.... | null | null | IRB-StP-GR-120696 | gr-qc | null | The quasi-two-dimensional modeling of the small adiabatic perturbation on the
background of the stationary configuration of the selfgravitating gas with the
weak transverse nonhomogeneity approximation is presented. The space periodic
character of the solution of this system is proofed.
| [
{
"created": "Tue, 25 Feb 1997 10:11:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gromov",
"Alexander",
"",
"St-Petersburg State Thechnical University, Russia"
],
[
"Perepelovsky",
"V.",
"",
"St-Petersburg ElectroTechnical University, Russia"
]
] | The quasi-two-dimensional modeling of the small adiabatic perturbation on the background of the stationary configuration of the selfgravitating gas with the weak transverse nonhomogeneity approximation is presented. The space periodic character of the solution of this system is proofed. |
gr-qc/0203043 | Victor Tapia | Victor Tapia | The number of tensor differential invariants of a Riemannian metric | LaTeX, 5 pages | null | null | null | gr-qc | null | We determine the number of functionally independent components of tensors
involving higher-order derivatives of a Riemannian metric.
| [
{
"created": "Tue, 12 Mar 2002 21:33:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tapia",
"Victor",
""
]
] | We determine the number of functionally independent components of tensors involving higher-order derivatives of a Riemannian metric. |
gr-qc/9703020 | Kirill A. Bronnikov | Kirill A. Bronnikov | Extra Dimensions, Nonminimal Couplings, Horizons and Wormholes | 6 pages, Latex | Grav.Cosmol. 2 (1996) 221-226 | null | RGS-VNIIMS-96/06 | gr-qc | null | Static, spherically symmetric configurations of gravity with nonminimally
coupled scalar fields are considered in D-dimensional space-times in the
framework of generalized scalar-tensor theories. We seek special cases when the
system has no naked singularity but instead forms either a black hole, or a
wormhole. Gener... | [
{
"created": "Fri, 7 Mar 1997 06:43:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bronnikov",
"Kirill A.",
""
]
] | Static, spherically symmetric configurations of gravity with nonminimally coupled scalar fields are considered in D-dimensional space-times in the framework of generalized scalar-tensor theories. We seek special cases when the system has no naked singularity but instead forms either a black hole, or a wormhole. General... |
0907.1556 | Ayan Chatterjee | Ayan Chatterjee | Entropy of Black Holes in N=2 Supergravity | 21 Pages, major revision, results unchanged | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the techniques of isolated horizon formalism, we construct the space of
solutions of asymptotically flat extremal black holes in N=2 pure supergravity
in 4 dimensions. We prove the laws of black hole mechanics. Further,
restricting to constant area phase space, we show that the spherical horizons
admits a U(1) ... | [
{
"created": "Thu, 9 Jul 2009 14:30:25 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Dec 2009 17:04:36 GMT",
"version": "v2"
}
] | 2009-12-03 | [
[
"Chatterjee",
"Ayan",
""
]
] | Using the techniques of isolated horizon formalism, we construct the space of solutions of asymptotically flat extremal black holes in N=2 pure supergravity in 4 dimensions. We prove the laws of black hole mechanics. Further, restricting to constant area phase space, we show that the spherical horizons admits a U(1) Ch... |
gr-qc/9903015 | Roberto B. Salgado | Roberto B. Salgado (Syracuse University) | Some Identities for the Quantum Measure and its Generalizations | (v1) 19 pages, LaTeX. (v2) 18 pages, LaTeX: minor corrections,
simplified proof of lemma 3 | Mod.Phys.Lett. A17 (2002) 711-728 | 10.1142/S0217732302007041 | SU-GP-99/3-1 | gr-qc hep-th math.RA quant-ph | null | After a brief review of classical probability theory (measure theory), we
present an observation (due to Sorkin) concerning an aspect of probability in
quantum mechanics. Following Sorkin, we introduce a generalized measure theory
based on a hierarchy of ``sum-rules.'' The first sum-rule yields classical
probability ... | [
{
"created": "Thu, 4 Mar 1999 23:11:27 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2002 02:54:37 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Salgado",
"Roberto B.",
"",
"Syracuse University"
]
] | After a brief review of classical probability theory (measure theory), we present an observation (due to Sorkin) concerning an aspect of probability in quantum mechanics. Following Sorkin, we introduce a generalized measure theory based on a hierarchy of ``sum-rules.'' The first sum-rule yields classical probability th... |
1607.00651 | Oleg Zaslavskii | O. B. Zaslavskii | Maximum efficiency of the collisional Penrose process | 18 pages. Typos corrected. Title somewhat modified according to
suggestions of editors of PRD | Phys. Rev. D 94, 064048 (2016) | 10.1103/PhysRevD.94.064048 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of two particles that move in the equatorial plane near
a general stationary rotating axially symmetric extremal black hole. One of
particles is critical (with fine-tuned parameters) and moves in the outward
direction. The second particle (usual, not fine-tuned) comes from infinity. We
examine t... | [
{
"created": "Sun, 3 Jul 2016 16:01:44 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Sep 2016 15:24:53 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of two particles that move in the equatorial plane near a general stationary rotating axially symmetric extremal black hole. One of particles is critical (with fine-tuned parameters) and moves in the outward direction. The second particle (usual, not fine-tuned) comes from infinity. We examine the... |
1812.05204 | Shinji Tsujikawa | Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa,
Daniele Vernieri | Tracker and scaling solutions in DHOST theories | 12 pages | Phys. Lett. B790 (2019) 167-175 | 10.1016/j.physletb.2019.01.009 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In quadratic-order degenerate higher-order scalar-tensor (DHOST) theories
compatible with gravitational-wave constraints, we derive the most general
Lagrangian allowing for tracker solutions characterized by $\dot{\phi}/H^p={\rm
constant}$, where $\dot{\phi}$ is the time derivative of a scalar field $\phi$,
$H$ is th... | [
{
"created": "Thu, 13 Dec 2018 00:07:14 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2019 13:00:47 GMT",
"version": "v2"
}
] | 2019-01-30 | [
[
"Frusciante",
"Noemi",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Koyama",
"Kazuya",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Vernieri",
"Daniele",
""
]
] | In quadratic-order degenerate higher-order scalar-tensor (DHOST) theories compatible with gravitational-wave constraints, we derive the most general Lagrangian allowing for tracker solutions characterized by $\dot{\phi}/H^p={\rm constant}$, where $\dot{\phi}$ is the time derivative of a scalar field $\phi$, $H$ is the ... |
2102.13427 | Takahisa Igata | Takahisa Igata, Kazunori Kohri, Kota Ogasawara | Photon emission from inside the innermost stable circular orbit | 21 pages, 9 figures; v2: published version | Phys. Rev. D 103, 104028 (2021) | 10.1103/PhysRevD.103.104028 | KEK-Cosmo-0273, KEK-TH-2305, KUNS-2858 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a situation where a light source orbiting the innermost stable
circular orbit (ISCO) of the Kerr black hole is gently falling from the
marginally stable orbit due to an infinitesimal perturbation. Assuming that the
light source emits photons isotropically, we show that the last radius at which
more than 5... | [
{
"created": "Fri, 26 Feb 2021 12:29:04 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 2021 03:12:17 GMT",
"version": "v2"
}
] | 2021-05-19 | [
[
"Igata",
"Takahisa",
""
],
[
"Kohri",
"Kazunori",
""
],
[
"Ogasawara",
"Kota",
""
]
] | We consider a situation where a light source orbiting the innermost stable circular orbit (ISCO) of the Kerr black hole is gently falling from the marginally stable orbit due to an infinitesimal perturbation. Assuming that the light source emits photons isotropically, we show that the last radius at which more than 50\... |
2010.10847 | Vinod Bhardwaj Dr. | Archana Dixit, Vinod Kumar Bhardwaj, Anirudh Pradhan | RHDE models in FRW Universe with two IR cut-offs with redshift
parametrization | 13 pages, 11 figures, 2 tables | The European Physical Journal Plus, Vol. 135, Issue 10, October
(2020) Article No. 831 (13 pages) | 10.1140/epjp/s13360-020-00850-6 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we have researched the cosmic expansion phenomenon in
flat FRW Universe through the interaction of the recently proposed
R$\grave{e}$nyi holographic dark energy (RHDE). For this reason, we assumed
Hubble (H) and Granda--Oliveros (GO) horizons as IR cut-off in the framework of
$f(R, T)$ gravity. Wi... | [
{
"created": "Wed, 21 Oct 2020 09:13:29 GMT",
"version": "v1"
}
] | 2021-08-02 | [
[
"Dixit",
"Archana",
""
],
[
"Bhardwaj",
"Vinod Kumar",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | In this manuscript, we have researched the cosmic expansion phenomenon in flat FRW Universe through the interaction of the recently proposed R$\grave{e}$nyi holographic dark energy (RHDE). For this reason, we assumed Hubble (H) and Granda--Oliveros (GO) horizons as IR cut-off in the framework of $f(R, T)$ gravity. With... |
1002.4115 | Jiri Podolsky | J. B. Griffiths, J. Podolsky | The Linet-Tian solution with a positive cosmological constant in four
and higher dimensions | 6 pages, 1 figure. To appear in Phys. Rev. D | Phys.Rev.D81:064015,2010 | 10.1103/PhysRevD.81.064015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The static, apparently cylindrically symmetric vacuum solution of Linet and
Tian for the case of a positive cosmological constant $\Lambda$ is shown to
have toroidal symmetry and, besides $\Lambda$, to include three arbitrary
parameters. It possesses two curvature singularities, of which one can be
removed by matchin... | [
{
"created": "Mon, 22 Feb 2010 13:47:23 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Griffiths",
"J. B.",
""
],
[
"Podolsky",
"J.",
""
]
] | The static, apparently cylindrically symmetric vacuum solution of Linet and Tian for the case of a positive cosmological constant $\Lambda$ is shown to have toroidal symmetry and, besides $\Lambda$, to include three arbitrary parameters. It possesses two curvature singularities, of which one can be removed by matching ... |
2211.09497 | Mokhtar Adda-Bedia | Mokhtar Adda-Bedia and Eytan Katzav | Kaluza-Klein Dimensional Reduction From Elasticity Theory of Crumpled
Paper | null | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | During the last century, two independent theories using the concept of
dimensional reduction have been developed independently. The first, known as
F\"oppl-von K\`arm\`an theory, uses Riemannian geometry and continuum mechanics
to study the shaping of thin elastic structures which could become as complex
as crumpled ... | [
{
"created": "Thu, 17 Nov 2022 12:42:09 GMT",
"version": "v1"
}
] | 2022-11-18 | [
[
"Adda-Bedia",
"Mokhtar",
""
],
[
"Katzav",
"Eytan",
""
]
] | During the last century, two independent theories using the concept of dimensional reduction have been developed independently. The first, known as F\"oppl-von K\`arm\`an theory, uses Riemannian geometry and continuum mechanics to study the shaping of thin elastic structures which could become as complex as crumpled pa... |
gr-qc/9807039 | Ali Nayeri | Ali Nayeri and T. Padmanabhan (IUCAA) | A possible Newtonian interpretation of relativistic cosmological
perturbation theory | 7 pages, 2 postscript figures, title was corrected | null | null | IUCAA-25/98 | gr-qc astro-ph | null | Cosmological perturbations with wavelengths smaller than Hubble radius can be
handled in the context of Newtonian theory with very high accuracy. The
application of this Newtonian approximation, however, is restricted to
nonrelativistic matter and cannot be used for relativistic matter. Recently, by
modifying the con... | [
{
"created": "Thu, 16 Jul 1998 10:06:03 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Jul 1998 05:54:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Nayeri",
"Ali",
"",
"IUCAA"
],
[
"Padmanabhan",
"T.",
"",
"IUCAA"
]
] | Cosmological perturbations with wavelengths smaller than Hubble radius can be handled in the context of Newtonian theory with very high accuracy. The application of this Newtonian approximation, however, is restricted to nonrelativistic matter and cannot be used for relativistic matter. Recently, by modifying the conti... |
1303.1256 | Subir Ghosh | Subir Ghosh (Indian Statistical Institute) | Quantum Gravity Effects in Geodesic Motion and Predictions of
Equivalence Principle Violation | Title changed, Universality of Free Fall expt. added, references
added, modified version, to appear in CQG | null | 10.1088/0264-9381/31/2/025025 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Equivalence Principle (EP) is violated by Quantum Gravity
(QG) effects. The predicted violations are compared to experimental
observations for Gravitational Redshift, Law of Reciprocal Action and
Universality of Free Fall. This allows us to derive explicit bounds for
$\beta$ - the QG scale.
In ou... | [
{
"created": "Wed, 6 Mar 2013 06:29:40 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2013 12:01:06 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Nov 2013 19:15:19 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"Ghosh",
"Subir",
"",
"Indian Statistical Institute"
]
] | We show that the Equivalence Principle (EP) is violated by Quantum Gravity (QG) effects. The predicted violations are compared to experimental observations for Gravitational Redshift, Law of Reciprocal Action and Universality of Free Fall. This allows us to derive explicit bounds for $\beta$ - the QG scale. In our appr... |
1006.3927 | Xiang-Song Chen | Xiang-Song Chen and Ben-Chao Zhu | The true radiation gauge for gravity | 11 pages, no figure; significant revision, showing how the TT gauge
can be adapted in the presence of source | Phys.Rev.D83:061501,2011 | 10.1103/PhysRevD.83.061501 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Corresponding to the similarity between the Lorentz gauge $\partial_\mu
A^\mu=0$ in electrodynamics and $g^{\mu\nu}\Gamma^\rho_{\mu\nu}=0$ in gravity,
we show that the counterpart of the radiation gauge $\partial_iA^i=0$ is
$g^{ij}\Gamma^\rho_{ij}=0$, in stead of other forms as discussed before.
Particularly: 1) at l... | [
{
"created": "Sun, 20 Jun 2010 11:22:44 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2010 07:58:42 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jan 2011 15:06:14 GMT",
"version": "v3"
}
] | 2011-03-21 | [
[
"Chen",
"Xiang-Song",
""
],
[
"Zhu",
"Ben-Chao",
""
]
] | Corresponding to the similarity between the Lorentz gauge $\partial_\mu A^\mu=0$ in electrodynamics and $g^{\mu\nu}\Gamma^\rho_{\mu\nu}=0$ in gravity, we show that the counterpart of the radiation gauge $\partial_iA^i=0$ is $g^{ij}\Gamma^\rho_{ij}=0$, in stead of other forms as discussed before. Particularly: 1) at lea... |
2007.13600 | Fabio Duvan Lora Clavijo Mr. | J. A. Arrieta-Villamizar, J. M. Vel\'asquez-Cadavid, O. M. Pimentel,
F. D. Lora-Clavijo, A. C. Guti\'errez-Pi\~neres | Shadows around the q-metric | Pages 20, 32 figures. Accepted for publication in Classical and
Quantum Gravity (CQG) | null | 10.1088/1361-6382/abc223 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One crucial problem in relativistic astrophysics is that of the nature of
black hole candidates. It is usually assumed that astrophysical black holes are
described by the Schwarzschild or Kerr space-times; however, there is no direct
evidence to assert this. Moreover, there are various solutions in general
relativity... | [
{
"created": "Mon, 27 Jul 2020 14:33:24 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2020 20:48:04 GMT",
"version": "v2"
}
] | 2020-11-05 | [
[
"Arrieta-Villamizar",
"J. A.",
""
],
[
"Velásquez-Cadavid",
"J. M.",
""
],
[
"Pimentel",
"O. M.",
""
],
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Gutiérrez-Piñeres",
"A. C.",
""
]
] | One crucial problem in relativistic astrophysics is that of the nature of black hole candidates. It is usually assumed that astrophysical black holes are described by the Schwarzschild or Kerr space-times; however, there is no direct evidence to assert this. Moreover, there are various solutions in general relativity t... |
1206.6736 | Thomas Cailleteau Mr | Thomas Cailleteau, Aurelien Barrau, Julien Grain and Francesca Vidotto | Consistency of holonomy-corrected scalar, vector and tensor
perturbations in Loop Quantum Cosmology | 5 pages | Phys. Rev. D 86, 087301 (2012) | 10.1103/PhysRevD.86.087301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Quantum Cosmology yields two kinds of quantum corrections to the
effective equations of motion for cosmological perturbations. Here we focus on
the holonomy kind and we study the problem of the closure of the resulting
algebra of constraints. Up to now, tensor, vector and scalar perturbations were
studied indepe... | [
{
"created": "Thu, 28 Jun 2012 15:46:14 GMT",
"version": "v1"
}
] | 2012-11-01 | [
[
"Cailleteau",
"Thomas",
""
],
[
"Barrau",
"Aurelien",
""
],
[
"Grain",
"Julien",
""
],
[
"Vidotto",
"Francesca",
""
]
] | Loop Quantum Cosmology yields two kinds of quantum corrections to the effective equations of motion for cosmological perturbations. Here we focus on the holonomy kind and we study the problem of the closure of the resulting algebra of constraints. Up to now, tensor, vector and scalar perturbations were studied independ... |
gr-qc/0105004 | Pal G. Molnar | Pal G. Molnar | Electrostatic boundary value problems in the Schwarzschild background | 18 pages, no figures, uses iopart.sty | Class.Quant.Grav.18:1853-1869,2001 | 10.1088/0264-9381/18/10/304 | null | gr-qc astro-ph | null | The electrostatic potential of any test charge distribution in Schwarzschild
space with boundary values is derived. We calculate the Green's function,
generalize the second Green's identity for p-forms and find the general
solution. Boundary value problems are solved. With a multipole expansion the
asymptotic propert... | [
{
"created": "Wed, 2 May 2001 11:01:55 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Molnar",
"Pal G.",
""
]
] | The electrostatic potential of any test charge distribution in Schwarzschild space with boundary values is derived. We calculate the Green's function, generalize the second Green's identity for p-forms and find the general solution. Boundary value problems are solved. With a multipole expansion the asymptotic property ... |
gr-qc/0402050 | Miguel Lorente | M. Lorente, P. Kramer | Tensor and spin representations of SO(4) and discrete quantum gravity | LaTeX, 18 pages, 1 eps figure. Communication presented to the
International Symposium Symmetries in Science XIII, July 2003, Bregenz. To be
published by Kluwer | null | 10.1007/1-4020-2634-X_18 | null | gr-qc | null | Starting from the defining transformations of complex matrices for the SO(4)
group, we construct the fundamental representation and the tensor and spinor
representations of the group SO(4). Given the commutation relations for the
corresponding algebra, the unitary representations of the group in terms of the
generali... | [
{
"created": "Wed, 11 Feb 2004 10:17:50 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 2004 10:32:52 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Feb 2004 18:31:36 GMT",
"version": "v3"
},
{
"created": "Wed, 25 Feb 2004 10:30:15 GMT",
"version": "v4"
}
] | 2015-06-25 | [
[
"Lorente",
"M.",
""
],
[
"Kramer",
"P.",
""
]
] | Starting from the defining transformations of complex matrices for the SO(4) group, we construct the fundamental representation and the tensor and spinor representations of the group SO(4). Given the commutation relations for the corresponding algebra, the unitary representations of the group in terms of the generalize... |
2401.09907 | Liang-Bi Wu | Li-Ming Cao, Jia-Ning Chen, Liang-Bi Wu, Libo Xie and Yu-Sen Zhou | The pseudospectrum and spectrum (in)stability of quantum corrected
Schwarzschild black hole | 23 pages, 10 figures. This manuscript has been accepted for
publication as a regular article in SCPMA | null | null | ICTS-USTC/PCFT-24-03 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we investigate the pseudospectrum and spectrum (in)stability
of quantum corrected Schwarzschild black hole. Methodologically, we use the
hyperboloidal framework to cast the quasinormal mode (QNM) problem into an
eigenvalue problem associated with a non-selfadjoint operator, and then the
spectrum and ps... | [
{
"created": "Thu, 18 Jan 2024 11:41:40 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Jan 2024 10:48:08 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Jun 2024 05:26:54 GMT",
"version": "v3"
}
] | 2024-06-14 | [
[
"Cao",
"Li-Ming",
""
],
[
"Chen",
"Jia-Ning",
""
],
[
"Wu",
"Liang-Bi",
""
],
[
"Xie",
"Libo",
""
],
[
"Zhou",
"Yu-Sen",
""
]
] | In this study, we investigate the pseudospectrum and spectrum (in)stability of quantum corrected Schwarzschild black hole. Methodologically, we use the hyperboloidal framework to cast the quasinormal mode (QNM) problem into an eigenvalue problem associated with a non-selfadjoint operator, and then the spectrum and pseu... |
gr-qc/0206052 | Charles Hellaby | Charles Hellaby and Andrzej Krasinski | You Can't Get Through Szekeres Wormholes - or - Regularity, Topology and
Causality in Quasi-Spherical Szekeres Models | zip file with LaTeX text + 6 figures (.eps & .ps). 47 pages. Second
replacement corrects some minor errors and typos. (First replacement prints
better on US letter size paper.) | Phys.Rev.D66:084011,2002 | 10.1103/PhysRevD.66.084011 | UCT-cosmology0201 | gr-qc | null | The spherically symmetric dust model of Lemaitre-Tolman can describe
wormholes, but the causal communication between the two asymptotic regions
through the neck is even less than in the vacuum
(Schwarzschild-Kruskal-Szekeres) case. We investigate the anisotropic
generalisation of the wormhole topology in the Szekeres... | [
{
"created": "Tue, 18 Jun 2002 13:27:29 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jun 2002 15:41:44 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jun 2002 15:52:13 GMT",
"version": "v3"
},
{
"created": "Tue, 27 Aug 2002 14:52:31 GMT",
"version": "v4"
}
] | 2016-08-31 | [
[
"Hellaby",
"Charles",
""
],
[
"Krasinski",
"Andrzej",
""
]
] | The spherically symmetric dust model of Lemaitre-Tolman can describe wormholes, but the causal communication between the two asymptotic regions through the neck is even less than in the vacuum (Schwarzschild-Kruskal-Szekeres) case. We investigate the anisotropic generalisation of the wormhole topology in the Szekeres m... |
2112.00497 | Andronikos Paliathanasis | Andronikos Paliathanasis | Dynamical analysis and cosmological evolution in Weyl integrable gravity | 17 pages, no figures | Universe 2021, 7(12), 468 | 10.3390/universe7120468 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the cosmological evolution for the physical parameters in Weyl
integrable gravity in a Friedmann--Lema\^{\i}tre--Robertson--Walker universe
with zero spatially curvature. For the matter component, we assume that it is
an ideal gas, and of the Chaplygin gas. From the Weyl integrable gravity a
scalar fie... | [
{
"created": "Wed, 1 Dec 2021 13:48:07 GMT",
"version": "v1"
}
] | 2021-12-02 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | We investigate the cosmological evolution for the physical parameters in Weyl integrable gravity in a Friedmann--Lema\^{\i}tre--Robertson--Walker universe with zero spatially curvature. For the matter component, we assume that it is an ideal gas, and of the Chaplygin gas. From the Weyl integrable gravity a scalar field... |
gr-qc/9906007 | Jose Socorro Garcia Diaz | Alfredo Mac\'ias and Jos\'e Socorro | Generalized Reissner-Nordstr\"om solution in Metric-Affine Gravity | 13 pages, Revtex, to appear in Class. Quantum Grav | Class.Quant.Grav. 16 (1999) 2323-2333 | 10.1088/0264-9381/16/7/312 | IFUG-99-10 | gr-qc | null | We present the generalized Reissner-Nordstr\"om solution of the field
equations of metric-affine gravity (MAG), endowed with electric and magnetic
charges, as well as with gravito-electric and gravito-magnetic charges and a
cosmological constant term. Moreover, the case $M=e_o$, i.e. mass equal to
electric charge and... | [
{
"created": "Wed, 2 Jun 1999 14:26:13 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Macías",
"Alfredo",
""
],
[
"Socorro",
"José",
""
]
] | We present the generalized Reissner-Nordstr\"om solution of the field equations of metric-affine gravity (MAG), endowed with electric and magnetic charges, as well as with gravito-electric and gravito-magnetic charges and a cosmological constant term. Moreover, the case $M=e_o$, i.e. mass equal to electric charge and $... |
0810.1714 | Carlo Rovelli | Claudio Perini, Carlo Rovelli, Simone Speziale | Self-energy and vertex radiative corrections in LQG | 11 pages, 3 figures | Phys.Lett.B682:78-84,2009 | 10.1016/j.physletb.2009.10.076 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the elementary radiative-correction terms in loop quantum
gravity. These are a two-vertex "elementary bubble" and a five-vertex "ball";
they correspond to the one-loop self-energy and the one-loop vertex correction
of ordinary quantum field theory. We compute their naive degree of (infrared)
divergence.
| [
{
"created": "Thu, 9 Oct 2008 18:32:50 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Oct 2008 07:51:25 GMT",
"version": "v2"
}
] | 2009-11-18 | [
[
"Perini",
"Claudio",
""
],
[
"Rovelli",
"Carlo",
""
],
[
"Speziale",
"Simone",
""
]
] | We consider the elementary radiative-correction terms in loop quantum gravity. These are a two-vertex "elementary bubble" and a five-vertex "ball"; they correspond to the one-loop self-energy and the one-loop vertex correction of ordinary quantum field theory. We compute their naive degree of (infrared) divergence. |
1108.4110 | Sunil Maharaj | K. Komathiraj, S. D. Maharaj | A class of charged relativistic spheres | 11 pages, To appear in Mathematical and Computational Applications | Mathematical and Computational Applications 15: 665-673, 2010 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a new class of exact solutions to the Einstein-Maxwell equations
which can be used to model the interior of charged relativistic objects. These
solutions can be written in terms of special functions in general; for
particular parameter values it is possible to find solutions in terms of
elementary functions. ... | [
{
"created": "Sat, 20 Aug 2011 11:17:46 GMT",
"version": "v1"
}
] | 2013-01-01 | [
[
"Komathiraj",
"K.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We find a new class of exact solutions to the Einstein-Maxwell equations which can be used to model the interior of charged relativistic objects. These solutions can be written in terms of special functions in general; for particular parameter values it is possible to find solutions in terms of elementary functions. Ou... |
gr-qc/0203079 | R. Aldrovandi | R. Aldrovandi, J. Gariel and G. Marcilhacy | On the pre-nucleosynthesis cosmological period | standard LateX, 28 pages (no figures) | null | null | IFT-P 018/2002 | gr-qc | null | Physics, as known from our local, around--earth experience, meets some of its
applicability limits at the time just preceding the period of primeval
nucleosynthesis. Attention is focussed here on the effects of the nucleon size.
Radiation--belonging nucleons are found to produce an extremely high pressure
at kT of th... | [
{
"created": "Fri, 22 Mar 2002 17:16:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Aldrovandi",
"R.",
""
],
[
"Gariel",
"J.",
""
],
[
"Marcilhacy",
"G.",
""
]
] | Physics, as known from our local, around--earth experience, meets some of its applicability limits at the time just preceding the period of primeval nucleosynthesis. Attention is focussed here on the effects of the nucleon size. Radiation--belonging nucleons are found to produce an extremely high pressure at kT of the ... |
1808.06974 | Killian Martineau | Killian Martineau | Detailed background dynamics and trans-planckian effects in loop quantum
cosmology | 4 pages, 2 figures, Proceedings of the 15th Marcel Grossmann Meeting
- MG15, July 1-7 2018, University of Rome "La Sapienza" | null | 10.1142/9789811258251_0302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmology appears as the most promising way to test and constrain quantum
gravity theories. Loop quantum gravity is among the most advanced attempts to
perform a non-perturbative quantization of general relativity. Its cosmological
counterpart, loop quantum cosmology, has clear predictions both for the
cosmological b... | [
{
"created": "Tue, 21 Aug 2018 15:46:44 GMT",
"version": "v1"
}
] | 2023-06-27 | [
[
"Martineau",
"Killian",
""
]
] | Cosmology appears as the most promising way to test and constrain quantum gravity theories. Loop quantum gravity is among the most advanced attempts to perform a non-perturbative quantization of general relativity. Its cosmological counterpart, loop quantum cosmology, has clear predictions both for the cosmological bac... |
2003.10284 | Daniela Doneva | Daniela D. Doneva, Stoytcho S. Yazadjiev | Relativistic stars in 4D Einstein-Gauss-Bonnet gravity | 9 pages, 3 figures | null | 10.1088/1475-7516/2021/05/024 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we investigate the structure of relativistic stars in 4D
Einstein-Gauss-Bonnet gravity. The mass-radius relations are obtained for
realistic hadronic and for strange quark star equations of state, and for a
wide range of the Gauss-Bonnet coupling parameter $\alpha$. Even though the
deviations fro... | [
{
"created": "Mon, 23 Mar 2020 14:04:18 GMT",
"version": "v1"
}
] | 2021-05-19 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In the present paper we investigate the structure of relativistic stars in 4D Einstein-Gauss-Bonnet gravity. The mass-radius relations are obtained for realistic hadronic and for strange quark star equations of state, and for a wide range of the Gauss-Bonnet coupling parameter $\alpha$. Even though the deviations from ... |
gr-qc/0406093 | Jiri Podolsky | Otakar Svitek and Jiri Podolsky | The Efroimsky formalism adapted to high-frequency perturbations | 7 pages, to appear in Class. Quantum Grav | Class.Quant.Grav. 21 (2004) 3579-3586 | 10.1088/0264-9381/21/14/017 | null | gr-qc | null | The Efroimsky perturbation scheme for consistent treatment of gravitational
waves and their influence on the background is summarized and compared with
classical Isaacson's high-frequency approach. We demonstrate that the Efroimsky
method in its present form is not compatible with the Isaacson limit of
high-frequency... | [
{
"created": "Wed, 23 Jun 2004 15:46:52 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Svitek",
"Otakar",
""
],
[
"Podolsky",
"Jiri",
""
]
] | The Efroimsky perturbation scheme for consistent treatment of gravitational waves and their influence on the background is summarized and compared with classical Isaacson's high-frequency approach. We demonstrate that the Efroimsky method in its present form is not compatible with the Isaacson limit of high-frequency g... |
0811.0985 | Christian Corda | Christian Corda | A longitudinal component in massive gravitational waves arising from a
bimetric theory of gravity | Published in Astroparticle Physics | Astropart.Phys.28:247-250,2007 | 10.1016/j.astropartphys.2007.05.009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a brief review of the work of de Paula, Miranda and Marinho on massive
gravitational waves arising from a bimetric theory of gravity, in this paper it
is shown that the presence of the mass generates a longi- tudinal component in
a particular polarization of the wave. The effect of this polarization on test
mas... | [
{
"created": "Thu, 6 Nov 2008 16:24:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Corda",
"Christian",
""
]
] | After a brief review of the work of de Paula, Miranda and Marinho on massive gravitational waves arising from a bimetric theory of gravity, in this paper it is shown that the presence of the mass generates a longi- tudinal component in a particular polarization of the wave. The effect of this polarization on test masse... |
2406.08831 | Diego S\'aez-Chill\'on G\'omez | Sergei D. Odintsov, Diego S\'aez-Chill\'on G\'omez and German S.
Sharov | Exponential gravity with logarithmic corrections in the presence of
axion dark matter | 12 pages, 3 figures. To be published in Phys. Dark Univ | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exponential modified gravity with additional logarithmic corrections is
considered with the presence of an axion-like scalar field in the role of dark
matter. Axion fields are thought to become important at late-times when the
axion-like scalar field oscillates around its vacuum expectation value,
mimicking dark m... | [
{
"created": "Thu, 13 Jun 2024 05:53:36 GMT",
"version": "v1"
}
] | 2024-06-14 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"Gómez",
"Diego Sáez-Chillón",
""
],
[
"Sharov",
"German S.",
""
]
] | An exponential modified gravity with additional logarithmic corrections is considered with the presence of an axion-like scalar field in the role of dark matter. Axion fields are thought to become important at late-times when the axion-like scalar field oscillates around its vacuum expectation value, mimicking dark mat... |
gr-qc/0307095 | Yuki Uchida | Daisuke Ida and Yuki Uchida | Stationary Einstein-Maxwell fields in arbitrary dimensions | 26 pages | Phys.Rev. D68 (2003) 104014 | 10.1103/PhysRevD.68.104014 | null | gr-qc | null | The Einstein-Maxwell equations in D-dimensions admitting (D-3) commuting
Killing vector fields have been investigated. The existence of the electric,
magnetic and twist potentials have been proved. The system is formulated as the
harmonic map coupled to gravity on three-dimensional base space generalizing
the Ernst s... | [
{
"created": "Tue, 22 Jul 2003 09:54:56 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Ida",
"Daisuke",
""
],
[
"Uchida",
"Yuki",
""
]
] | The Einstein-Maxwell equations in D-dimensions admitting (D-3) commuting Killing vector fields have been investigated. The existence of the electric, magnetic and twist potentials have been proved. The system is formulated as the harmonic map coupled to gravity on three-dimensional base space generalizing the Ernst sys... |
0907.2114 | Alexander A. Chernitskii | Alexander A. Chernitskii | On unification of gravitation and electromagnetism in the framework of a
general-relativistic approach | 3 pages, Talk given at the International Conference RUSGRAV-13, June
23-28, 2008, PFUR, Moscow | Grav.Cosmol.15:151-153,2009 | 10.1134/S0202289309020091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the unification problem for the gravitational and electromagnetic
interactions and its possible solution on the basis of the existence of an
effective Riemannian space in nonlinear electrodynamics
| [
{
"created": "Mon, 13 Jul 2009 08:44:59 GMT",
"version": "v1"
}
] | 2010-12-15 | [
[
"Chernitskii",
"Alexander A.",
""
]
] | We consider the unification problem for the gravitational and electromagnetic interactions and its possible solution on the basis of the existence of an effective Riemannian space in nonlinear electrodynamics |
2402.07036 | Jonathan Holland | Jonathan Holland and George Sparling | Sachs equations and plane waves, I: Rosen universes | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article, the first in a series, analyzes the general theory of plane
wave spacetimes. Following Dmitri Aleekseevsky, these are defined as spacetimes
admitting a group of dilations leaving invariant a smooth curve. If this curve
is specified as part of the structure, the spacetime is termed a Penrose limit,
whose... | [
{
"created": "Sat, 10 Feb 2024 20:21:35 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Apr 2024 10:51:39 GMT",
"version": "v2"
}
] | 2024-04-10 | [
[
"Holland",
"Jonathan",
""
],
[
"Sparling",
"George",
""
]
] | This article, the first in a series, analyzes the general theory of plane wave spacetimes. Following Dmitri Aleekseevsky, these are defined as spacetimes admitting a group of dilations leaving invariant a smooth curve. If this curve is specified as part of the structure, the spacetime is termed a Penrose limit, whose t... |
1908.09286 | Kiyoshi Shiraishi | Nahomi Kan, Masashi Kuniyasu, Kiyoshi Shiraishi, Kohjiroh Takimoto | Equivalent Hamiltonian approach to quantum cosmology of integrable
models | 25 pages, 22 figures. Final version | Class. Quant. Grav. 37 (2020) 10, 105002 | 10.1088/1361-6382/ab8602 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an approach to quantum cosmology of integrable models. To analyze
the models with two dynamical variables, we introduce equivalent Hamiltonians
in reduced phase spaces, which are obtained with the aid of the Faddeev--Jackiw
method. Quantum dynamics of the models can be studied by using the equivalent
Hamil... | [
{
"created": "Sun, 25 Aug 2019 09:15:32 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2019 08:52:12 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Nov 2019 01:25:28 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Feb 2020 08:27:11 GMT",
"version": "v4"
},
{
"cre... | 2020-05-11 | [
[
"Kan",
"Nahomi",
""
],
[
"Kuniyasu",
"Masashi",
""
],
[
"Shiraishi",
"Kiyoshi",
""
],
[
"Takimoto",
"Kohjiroh",
""
]
] | We propose an approach to quantum cosmology of integrable models. To analyze the models with two dynamical variables, we introduce equivalent Hamiltonians in reduced phase spaces, which are obtained with the aid of the Faddeev--Jackiw method. Quantum dynamics of the models can be studied by using the equivalent Hamilto... |
2402.15354 | Krishnendu De Dr. | Krishnendu De, Uday Chand De and Ljubica Velimirovic | Some curvature properties of perfect fluid spacetimes | null | Quaestiones Mathematicae (2023) | 10.2989/16073606.2023.2255933 | null | gr-qc math.DG | http://creativecommons.org/licenses/by/4.0/ | In this paper we assume that a perfect fluid is the source of the
gravitational field while analyzing the solutions to the Einstein field
equations.
| [
{
"created": "Fri, 23 Feb 2024 14:40:04 GMT",
"version": "v1"
}
] | 2024-02-26 | [
[
"De",
"Krishnendu",
""
],
[
"De",
"Uday Chand",
""
],
[
"Velimirovic",
"Ljubica",
""
]
] | In this paper we assume that a perfect fluid is the source of the gravitational field while analyzing the solutions to the Einstein field equations. |
1901.11506 | Wu-Sheng Dai | Wen-Du Li and Wu-Sheng Dai | Geodesic dual spacetime | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A duality between spacetime manifolds, the geodesic duality, is introduced.
Two manifolds are geodesic dual, if the transformation between their metrics is
also the transformation between their geodesics. That is, the transformation
that transforms the metric to the metric of the dual manifold is also the
transformat... | [
{
"created": "Thu, 31 Jan 2019 18:11:59 GMT",
"version": "v1"
}
] | 2019-02-01 | [
[
"Li",
"Wen-Du",
""
],
[
"Dai",
"Wu-Sheng",
""
]
] | A duality between spacetime manifolds, the geodesic duality, is introduced. Two manifolds are geodesic dual, if the transformation between their metrics is also the transformation between their geodesics. That is, the transformation that transforms the metric to the metric of the dual manifold is also the transformatio... |
gr-qc/9503025 | Joan Masso | Peter Anninos, Karen Camarda, Joan Masso, Edward Seidel, Wai-Mo Suen,
John Towns | Three dimensional numerical relativity: the evolution of black holes | 35 pages, LaTeX with RevTeX 3.0 macros. 27 postscript figures taking
7 MB of space, uuencoded and gz-compressed into a 2MB uufile. Also available
at http://jean-luc.ncsa.uiuc.edu/Papers/ and mpeg simulations at
http://jean-luc.ncsa.uiuc.edu/Movies/ Submitted to Physical Review D | Phys.Rev. D52 (1995) 2059-2082 | 10.1103/PhysRevD.52.2059 | WUGRAV-95-4 | gr-qc | null | We report on a new 3D numerical code designed to solve the Einstein equations
for general vacuum spacetimes. This code is based on the standard 3+1 approach
using cartesian coordinates. We discuss the numerical techniques used in
developing this code, and its performance on massively parallel and vector
supercomputer... | [
{
"created": "Wed, 15 Mar 1995 00:04:38 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Anninos",
"Peter",
""
],
[
"Camarda",
"Karen",
""
],
[
"Masso",
"Joan",
""
],
[
"Seidel",
"Edward",
""
],
[
"Suen",
"Wai-Mo",
""
],
[
"Towns",
"John",
""
]
] | We report on a new 3D numerical code designed to solve the Einstein equations for general vacuum spacetimes. This code is based on the standard 3+1 approach using cartesian coordinates. We discuss the numerical techniques used in developing this code, and its performance on massively parallel and vector supercomputers.... |
1609.07322 | Timothy Walton | Robin W. Tucker and Timothy J. Walton | On Gravitational Chirality as the Genesis of Astrophysical Jets | 16 pages, 10 figures; Updated version accepted by CQG | null | 10.1088/1361-6382/aa5325 | null | gr-qc astro-ph.GA physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been suggested that single and double jets observed emanating from
certain astrophysical objects may have a purely gravitational origin. We
discuss new classes of plane-fronted and pulsed gravitational wave solutions to
the equation for perturbations of Ricci-flat spacetimes around Minkowski
metrics, as models... | [
{
"created": "Fri, 23 Sep 2016 11:35:04 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Dec 2016 11:12:58 GMT",
"version": "v2"
}
] | 2017-01-18 | [
[
"Tucker",
"Robin W.",
""
],
[
"Walton",
"Timothy J.",
""
]
] | It has been suggested that single and double jets observed emanating from certain astrophysical objects may have a purely gravitational origin. We discuss new classes of plane-fronted and pulsed gravitational wave solutions to the equation for perturbations of Ricci-flat spacetimes around Minkowski metrics, as models f... |
1107.3210 | Sigbjorn Hervik | Sigbjorn Hervik | All metrics have curvature tensors characterised by its invariants as a
limit: the \epsilon-property | 6 pages | Class.Quant.Grav.28:157001,2011 | 10.1088/0264-9381/28/15/157001 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove a generalisation of the $\epsilon$-property, namely that for any
dimension and signature, a metric which is not characterised by its polynomial
scalar curvature invariants, there is a frame such that the components of the
curvature tensors can be arbitrary close to a certain "background". This
"background" i... | [
{
"created": "Sat, 16 Jul 2011 08:47:14 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Hervik",
"Sigbjorn",
""
]
] | We prove a generalisation of the $\epsilon$-property, namely that for any dimension and signature, a metric which is not characterised by its polynomial scalar curvature invariants, there is a frame such that the components of the curvature tensors can be arbitrary close to a certain "background". This "background" is ... |
gr-qc/0402121 | Gavriel Segre Dr. | Gavriel Segre | The role of Topology in the classical geometric theories of gravitation | null | null | null | null | gr-qc math-ph math.MP | null | I withdraw the previous version of the paper since it contains conceptual and
mathematical mistakes. I will soon replace it with a radically revised version.
| [
{
"created": "Fri, 27 Feb 2004 19:09:10 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2004 18:54:14 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Jul 2004 13:52:56 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Segre",
"Gavriel",
""
]
] | I withdraw the previous version of the paper since it contains conceptual and mathematical mistakes. I will soon replace it with a radically revised version. |
1502.07508 | Marcello Ortaggio | Marcello Ortaggio, Alena Pravdov\'a | Asymptotic properties of gravitational and electromagnetic fields in
higher dimensions | 6 pages; summary of (parts of) arXiv:1403.7559 and arXiv:1406.3186.
Proceedings of Spanish Relativity Meeting ERE 2014: Almost 100 years after
Einstein Revolution, Valencia, September 1-5, 2014
(http://www.uv.es/ere2014/) | null | 10.1088/1742-6596/600/1/012052 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize the fall-off of electromagnetic and gravitational fields in n>5
dimensional Ricci-flat spacetimes along an asympotically expanding non-singular
geodesic null congruence.
| [
{
"created": "Thu, 26 Feb 2015 11:20:47 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravdová",
"Alena",
""
]
] | We summarize the fall-off of electromagnetic and gravitational fields in n>5 dimensional Ricci-flat spacetimes along an asympotically expanding non-singular geodesic null congruence. |
1301.4891 | Mohammad Reza Setare | M. R. Setare, N. Mohammadipour | Can $f(T)$ gravity theories mimic $\Lambda$CDM cosmic history | 15 pages, 1 figure, accepted for publication in JCAP | JCAP01(2013)015, doi:10.1088/1475-7516/2013/01/015 | 10.1088/1475-7516/2013/01/015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the teleparallel Lagrangian density described by the torsion scalar
T has been extended to a function of T. The $f(T)$ modified teleparallel
gravity has been proposed as the natural gravitational alternative for dark
energy to explain the late time acceleration of the universe. In order to
reconstruct the fu... | [
{
"created": "Sat, 12 Jan 2013 06:52:21 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Setare",
"M. R.",
""
],
[
"Mohammadipour",
"N.",
""
]
] | Recently the teleparallel Lagrangian density described by the torsion scalar T has been extended to a function of T. The $f(T)$ modified teleparallel gravity has been proposed as the natural gravitational alternative for dark energy to explain the late time acceleration of the universe. In order to reconstruct the func... |
gr-qc/0105045 | Alan D. Rendall | Markus Kunze and Alan D. Rendall | Simplified models of electromagnetic and gravitational radiation damping | null | Class.Quant.Grav. 18 (2001) 3573-3588 | 10.1088/0264-9381/18/17/311 | AEI-2001-051 | gr-qc | null | In previous work the authors analysed the global properties of an approximate
model of radiation damping for charged particles. This work is put into context
and related to the original motivation of understanding approximations used in
the study of gravitational radiation damping. It is examined to what extent the
r... | [
{
"created": "Mon, 14 May 2001 13:27:40 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kunze",
"Markus",
""
],
[
"Rendall",
"Alan D.",
""
]
] | In previous work the authors analysed the global properties of an approximate model of radiation damping for charged particles. This work is put into context and related to the original motivation of understanding approximations used in the study of gravitational radiation damping. It is examined to what extent the res... |
gr-qc/0511143 | Pedro Marronetti | Pedro Marronetti | Momentum constraint relaxation | 17 pages, 10 figures. New numerical tests and references added. More
detailed description of the algorithms are provided. Final published version | Class.Quant.Grav. 23 (2006) 2681-2696 | 10.1088/0264-9381/23/7/027 | null | gr-qc astro-ph | null | Full relativistic simulations in three dimensions invariably develop runaway
modes that grow exponentially and are accompanied by violations of the
Hamiltonian and momentum constraints. Recently, we introduced a numerical
method (Hamiltonian relaxation) that greatly reduces the Hamiltonian constraint
violation and he... | [
{
"created": "Sun, 27 Nov 2005 15:24:35 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Mar 2006 15:49:44 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Marronetti",
"Pedro",
""
]
] | Full relativistic simulations in three dimensions invariably develop runaway modes that grow exponentially and are accompanied by violations of the Hamiltonian and momentum constraints. Recently, we introduced a numerical method (Hamiltonian relaxation) that greatly reduces the Hamiltonian constraint violation and help... |
2012.05714 | Qudsia Gani | M. Hameeda, Q. Gani, B. Pourhassan, M.C.Rocca | Boltzmann and Tsallis statistical approaches to study Quantum
corrections at large distances and clustering of galaxies | 34 pages, 9 Figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravity is so different from other fundamental forces that it is now
essentially treated as a non-fundamental force of entropic origin. A number of
good studies have been carried out in this direction. Quantum gravity has also
significantly improved our understanding by combining gravity well with quantum
physics. Ho... | [
{
"created": "Wed, 9 Dec 2020 07:26:04 GMT",
"version": "v1"
}
] | 2020-12-11 | [
[
"Hameeda",
"M.",
""
],
[
"Gani",
"Q.",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Rocca",
"M. C.",
""
]
] | Gravity is so different from other fundamental forces that it is now essentially treated as a non-fundamental force of entropic origin. A number of good studies have been carried out in this direction. Quantum gravity has also significantly improved our understanding by combining gravity well with quantum physics. Howe... |
1404.3582 | Victor Berezin | Victor Berezin | On the phenomenological description of particle creation and its
influence on the space-time metrics | 8 pages. To be publishe in the Proceedings of the "RUSGRAV"
Conference, Kazan' June 30 -July 5, 2014 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The method is proposed for the phenomenological description of particle
creation by external fields (in the presence of gravitational field or without
it). It is shown that, despite the appearance of the non-dynamical degrees of
freedom, such as the number density and four-velocities of particles at the
moment of cre... | [
{
"created": "Mon, 14 Apr 2014 13:55:50 GMT",
"version": "v1"
}
] | 2014-04-15 | [
[
"Berezin",
"Victor",
""
]
] | The method is proposed for the phenomenological description of particle creation by external fields (in the presence of gravitational field or without it). It is shown that, despite the appearance of the non-dynamical degrees of freedom, such as the number density and four-velocities of particles at the moment of creat... |
gr-qc/9403036 | null | I. G. Avramidi | Covariant methods for calculating the low-energy effective action in
quantum field theory and quantum gravity | 48 pages, plain TeX, University of Greifswald, EMA-MAT-1994-2 | null | null | null | gr-qc hep-th | null | We continue the development of the effective covariant methods for
calculating the heat kernel and the one-loop effective action in quantum field
theory and quantum gravity. The status of the low-energy approximation in
quantum gauge theories and quantum gravity is discussed in detail on the basis
of analyzing the lo... | [
{
"created": "Fri, 18 Mar 1994 18:31:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Avramidi",
"I. G.",
""
]
] | We continue the development of the effective covariant methods for calculating the heat kernel and the one-loop effective action in quantum field theory and quantum gravity. The status of the low-energy approximation in quantum gauge theories and quantum gravity is discussed in detail on the basis of analyzing the loca... |
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