id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1006.4906 | Alfredo Lopez Ortega | A. Lopez-Ortega | Quasinormal frequencies of the Dirac field in the massless topological
black hole | 10 pages | Rev. Mex. Fis.56:44-53, 2010 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the recent computations of the quasinormal frequencies of higher
dimensional black holes we exactly calculate the quasinormal frequencies of the
Dirac field propagating in D-dimensional (D > 4) massless topological black
hole. From the exact values of the quasinormal frequencies for the fermion and
boson... | [
{
"created": "Fri, 25 Jun 2010 04:13:22 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Lopez-Ortega",
"A.",
""
]
] | Motivated by the recent computations of the quasinormal frequencies of higher dimensional black holes we exactly calculate the quasinormal frequencies of the Dirac field propagating in D-dimensional (D > 4) massless topological black hole. From the exact values of the quasinormal frequencies for the fermion and boson f... |
0908.2690 | Hamid Reza Sepangi | H. R. Sepangi and S. Shahidi | Virial mass in DGP brane cosmology | 12 pages, 1 figure, to appear in CQG | Class.Quant.Grav.26:185010,2009 | 10.1088/0264-9381/26/18/185010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the virial mass discrepancy in the context of a DPG brane-world
scenario and show that such a framework can offer viable explanations to
account for the mass discrepancy problem. This is done by defining a
geometrical mass $\mathcal{N}$ that we prove to be proportional to the virial
mass. Estimating $\mathca... | [
{
"created": "Wed, 19 Aug 2009 08:07:24 GMT",
"version": "v1"
}
] | 2009-11-09 | [
[
"Sepangi",
"H. R.",
""
],
[
"Shahidi",
"S.",
""
]
] | We study the virial mass discrepancy in the context of a DPG brane-world scenario and show that such a framework can offer viable explanations to account for the mass discrepancy problem. This is done by defining a geometrical mass $\mathcal{N}$ that we prove to be proportional to the virial mass. Estimating $\mathcal{... |
2405.06407 | Xiao Yan Chew | Xiao Yan Chew, Kok-Geng Lim | Gravitating Scalarons with Inverted Higgs Potential | 18 pages with 9 figures. Special Issue of the Universe (MDPI):
Compact Objects (invited contribution) | Universe 2024, 10(5), 212 | 10.3390/universe10050212 | null | gr-qc hep-th nlin.PS | http://creativecommons.org/licenses/by/4.0/ | Previously, a class of regular and asymptotically flat gravitating scalar
solitons (scalarons) has been constructed in the Einstein--Klein--Gordon (EKG)
theory by adopting a phantom field with Higgs-like potential where the kinetic
term has the wrong sign and the scalaron possesses the negative
Arnowitt--Deser--Misne... | [
{
"created": "Fri, 10 May 2024 11:42:06 GMT",
"version": "v1"
}
] | 2024-05-13 | [
[
"Chew",
"Xiao Yan",
""
],
[
"Lim",
"Kok-Geng",
""
]
] | Previously, a class of regular and asymptotically flat gravitating scalar solitons (scalarons) has been constructed in the Einstein--Klein--Gordon (EKG) theory by adopting a phantom field with Higgs-like potential where the kinetic term has the wrong sign and the scalaron possesses the negative Arnowitt--Deser--Misner ... |
1209.2496 | Hongwei Yu | Jiawei Hu and Hongwei Yu | Geometric phase outside a Schwarzschild black hole and the Hawking
effect | 14 pages, no figures, a typo in the References corrected, version to
appear in JHEP. arXiv admin note: text overlap with arXiv:1109.0335 | JHEP 09(2012)062 | 10.1007/JHEP09(2012)062 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Hawking effect in terms of the geometric phase acquired by a
two-level atom as a result of coupling to vacuum fluctuations outside a
Schwarzschild black hole in a gedanken experiment. We treat the atom in
interaction with a bath of fluctuating quantized massless scalar fields as an
open quantum system, w... | [
{
"created": "Wed, 12 Sep 2012 04:40:24 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2012 04:02:14 GMT",
"version": "v2"
}
] | 2012-09-26 | [
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | We study the Hawking effect in terms of the geometric phase acquired by a two-level atom as a result of coupling to vacuum fluctuations outside a Schwarzschild black hole in a gedanken experiment. We treat the atom in interaction with a bath of fluctuating quantized massless scalar fields as an open quantum system, who... |
1006.1246 | Margus Saal | Laur J\"arv, Piret Kuusk, Margus Saal | Scalar-tensor cosmologies with a potential in the general relativity
limit: time evolution | 10 pages, 1 figure | Phys.Lett.B694:1-5,2010 | 10.1016/j.physletb.2010.09.029 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Friedmann-Lema\^{\i}tre-Robertson-Walker flat cosmological models
in the framework of general Jordan frame scalar-tensor theories of gravity with
arbitrary coupling function and potential. For the era when the cosmological
energy density of the scalar potential dominates over the energy density of
ordinar... | [
{
"created": "Mon, 7 Jun 2010 12:46:35 GMT",
"version": "v1"
}
] | 2011-01-06 | [
[
"Järv",
"Laur",
""
],
[
"Kuusk",
"Piret",
""
],
[
"Saal",
"Margus",
""
]
] | We consider Friedmann-Lema\^{\i}tre-Robertson-Walker flat cosmological models in the framework of general Jordan frame scalar-tensor theories of gravity with arbitrary coupling function and potential. For the era when the cosmological energy density of the scalar potential dominates over the energy density of ordinary ... |
1604.07032 | Cosimo Bambi | M. Ghasemi-Nodehi, Cosimo Bambi | Note on a new parametrization for testing the Kerr metric | 8 pages, 3 figures | Eur. Phys. J. C76: 290, 2016 | 10.1140/epjc/s10052-016-4137-2 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new parametrization for testing the Kerr nature of astrophysical
black hole candidates. The common approaches focus on the attempt to constrain
possible deviations from the Kerr solution described by new terms in the
metric. Here we adopt a different perspective. The mass and the spin of a black
hole mak... | [
{
"created": "Sun, 24 Apr 2016 13:50:06 GMT",
"version": "v1"
}
] | 2016-05-31 | [
[
"Ghasemi-Nodehi",
"M.",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We propose a new parametrization for testing the Kerr nature of astrophysical black hole candidates. The common approaches focus on the attempt to constrain possible deviations from the Kerr solution described by new terms in the metric. Here we adopt a different perspective. The mass and the spin of a black hole make ... |
gr-qc/0102041 | John Klauder | John R. Klauder | Noncanonical quantization of gravity. II. Constraints and the physical
Hilbert space | LaTeX, 42 pages, no figures | J.Math.Phys. 42 (2001) 4440-4465 | 10.1063/1.1385375 | null | gr-qc hep-th math-ph math.MP quant-ph | null | The program of quantizing the gravitational field with the help of affine
field variables is continued. For completeness, a review of the selection
criteria that singles out the affine fields, the alternative treatment of
constraints, and the choice of the initial (before imposition of the
constraints) ultralocal rep... | [
{
"created": "Fri, 9 Feb 2001 18:22:13 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Klauder",
"John R.",
""
]
] | The program of quantizing the gravitational field with the help of affine field variables is continued. For completeness, a review of the selection criteria that singles out the affine fields, the alternative treatment of constraints, and the choice of the initial (before imposition of the constraints) ultralocal repre... |
gr-qc/9912006 | Wlodzimierz Piechocki | George Jorjadze and Wlodzimierz Piechocki | Particle dynamics on hyperboloid and unitary representation of SO(1,N)
group | 12 pages, LaTeX2e, no figures | Phys.Lett. B476 (2000) 134-140 | 10.1016/S0370-2693(00)00116-7 | null | gr-qc astro-ph hep-th | null | We analyze particle dynamics on $N$ dimensional one-sheet hyperboloid
embedded in $N+1$ dimensional Minkowski space. The dynamical integrals
constructed by $SO_\uparrow (1,N)$ symmetry of spacetime are used for the
gauge-invariant Hamiltonian reduction. The physical phase-space parametrizes
the set of all classical t... | [
{
"created": "Thu, 2 Dec 1999 12:17:23 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Jorjadze",
"George",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We analyze particle dynamics on $N$ dimensional one-sheet hyperboloid embedded in $N+1$ dimensional Minkowski space. The dynamical integrals constructed by $SO_\uparrow (1,N)$ symmetry of spacetime are used for the gauge-invariant Hamiltonian reduction. The physical phase-space parametrizes the set of all classical tra... |
2104.09438 | Hang Yu | Hang Yu and Rana X. Adhikari and Ryan Magee and Surabhi Sachdev and
Yanbei Chen | Early warning of coalescing neutron-star and neutron-star-black-hole
binaries from nonstationary noise background using neural networks | 15 pages, 12 figures; to be submitted to PRD | Phys. Rev. D 104, 062004 (2021) | 10.1103/PhysRevD.104.062004 | null | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The success of the multi-messenger astronomy relies on gravitational-wave
observatories like LIGO and Virgo to provide prompt warning of merger events
involving neutron stars (including both binary neutron stars and
neutron-star-black-holes), which further depends critically on the
low-frequency sensitivity of LIGO a... | [
{
"created": "Mon, 19 Apr 2021 16:36:50 GMT",
"version": "v1"
}
] | 2021-09-15 | [
[
"Yu",
"Hang",
""
],
[
"Adhikari",
"Rana X.",
""
],
[
"Magee",
"Ryan",
""
],
[
"Sachdev",
"Surabhi",
""
],
[
"Chen",
"Yanbei",
""
]
] | The success of the multi-messenger astronomy relies on gravitational-wave observatories like LIGO and Virgo to provide prompt warning of merger events involving neutron stars (including both binary neutron stars and neutron-star-black-holes), which further depends critically on the low-frequency sensitivity of LIGO as ... |
1704.06883 | Anton Sheykin | A. A. Sheykin, S. A. Paston | Field-Theoretical Formulation of Regge-Teitelboim Gravity | This version contains some additions in comparison with the journal
version: the derivation of the Jacobian was added | Physics of Atomic Nuclei, 2016, Vol. 79, No. 11-12, pp. 1494-1496 | 10.1134/S1063778816100124 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theory of gravity is considered in the Regge-Teitelboim approach in which the
pseudo-Riemannian space is treated as a surface isometrically embedded in an
ambient Minkowski space of higher dimension. This approach is formulated in
terms of a field theory in which the original pseudo-Rimannian space is defined
by the ... | [
{
"created": "Sun, 23 Apr 2017 05:26:02 GMT",
"version": "v1"
}
] | 2017-04-25 | [
[
"Sheykin",
"A. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | Theory of gravity is considered in the Regge-Teitelboim approach in which the pseudo-Riemannian space is treated as a surface isometrically embedded in an ambient Minkowski space of higher dimension. This approach is formulated in terms of a field theory in which the original pseudo-Rimannian space is defined by the fi... |
1703.09355 | Abhishek Majhi | Abhishek Majhi | Non-extensive Statistical Mechanics and Black Hole Entropy From Quantum
Geometry | 6 pages, published version | Physics Letters B 775 (2017) 32-36 | 10.1016/j.physletb.2017.10.043 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using non-extensive statistical mechanics, the Bekenstein-Hawking area law is
obtained from microstates of black holes in loop quantum gravity, for arbitrary
real positive values of the Barbero-Immirzi parameter$(\gamma)$. The
arbitrariness of $\gamma$ is encoded in the strength of the "bias" created in
the horizon m... | [
{
"created": "Tue, 28 Mar 2017 00:21:24 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Oct 2017 04:32:12 GMT",
"version": "v2"
}
] | 2017-10-31 | [
[
"Majhi",
"Abhishek",
""
]
] | Using non-extensive statistical mechanics, the Bekenstein-Hawking area law is obtained from microstates of black holes in loop quantum gravity, for arbitrary real positive values of the Barbero-Immirzi parameter$(\gamma)$. The arbitrariness of $\gamma$ is encoded in the strength of the "bias" created in the horizon mic... |
1212.4773 | Martin Bojowald | Martin Bojowald, George M. Paily | Deformed General Relativity | 14 pages | Phys. Rev. D 87 (2013) 044044 | 10.1103/PhysRevD.87.044044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deformed special relativity is embedded in deformed general relativity using
the methods of canonical relativity and loop quantum gravity. Phase-space
dependent deformations of symmetry algebras then appear, which in some regimes
can be rewritten as non-linear Poincare algebras with momentum-dependent
deformations of... | [
{
"created": "Wed, 19 Dec 2012 18:11:07 GMT",
"version": "v1"
}
] | 2013-08-05 | [
[
"Bojowald",
"Martin",
""
],
[
"Paily",
"George M.",
""
]
] | Deformed special relativity is embedded in deformed general relativity using the methods of canonical relativity and loop quantum gravity. Phase-space dependent deformations of symmetry algebras then appear, which in some regimes can be rewritten as non-linear Poincare algebras with momentum-dependent deformations of c... |
1012.1835 | Torsten Sch\"onfeld | Catherine Meusburger, Torsten Sch\"onfeld | Gauge fixing in (2+1)-gravity: Dirac bracket and spacetime geometry | 44 pages, 7 figures; v2 makes a few small improvements suggested by
referees | Class.Quant.Grav.28:125008,2011 | 10.1088/0264-9381/28/12/125008 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider (2+1)-gravity with vanishing cosmological constant as a
constrained dynamical system. By applying Dirac's gauge fixing procedure, we
implement the constraints and determine the Dirac bracket on the
gauge-invariant phase space. The chosen gauge fixing conditions have a natural
physical interpretation and s... | [
{
"created": "Wed, 8 Dec 2010 19:32:38 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2011 10:38:38 GMT",
"version": "v2"
}
] | 2011-10-05 | [
[
"Meusburger",
"Catherine",
""
],
[
"Schönfeld",
"Torsten",
""
]
] | We consider (2+1)-gravity with vanishing cosmological constant as a constrained dynamical system. By applying Dirac's gauge fixing procedure, we implement the constraints and determine the Dirac bracket on the gauge-invariant phase space. The chosen gauge fixing conditions have a natural physical interpretation and spe... |
0711.2875 | Alejandro Perez | Merced Montesinos and Alejandro Perez | Two-dimensional topological field theories coupled to four-dimensional
BF theory | null | Phys.Rev.D77:104020,2008 | 10.1103/PhysRevD.77.104020 | null | gr-qc | null | Four dimensional BF theory admits a natural coupling to extended sources
supported on two dimensional surfaces or string world-sheets. Solutions of the
theory are in one to one correspondence with solutions of Einstein equations
with distributional matter (cosmic strings). We study new (topological field)
theories th... | [
{
"created": "Mon, 19 Nov 2007 09:44:44 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Montesinos",
"Merced",
""
],
[
"Perez",
"Alejandro",
""
]
] | Four dimensional BF theory admits a natural coupling to extended sources supported on two dimensional surfaces or string world-sheets. Solutions of the theory are in one to one correspondence with solutions of Einstein equations with distributional matter (cosmic strings). We study new (topological field) theories that... |
1906.10391 | Vladimir Ivashchuk | K. K. Ernazarov and V. D. Ivashchuk | Stable exponential cosmological solutions with three different
Hubble-like parameters in EGB model with a $\Lambda$-term | 38 pages, 6 figures, LaTex, Section 7 and Figure 6 are added | null | 10.1140/epjc/s10052-020-8107-3 | IGC-PFUR/20-03/06 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a $D$-dimensional Einstein-Gauss-Bonnet model with a cosmological
term $\Lambda$ and two non-zero constants: $\alpha_1$ and $\alpha_2$. We
restrict the metrics to be diagonal ones and study a class of solutions with
exponential time dependence of three scale factors, governed by three
non-coinciding Hubbl... | [
{
"created": "Tue, 25 Jun 2019 08:54:22 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2019 14:57:12 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Feb 2020 21:04:30 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Mar 2020 23:06:46 GMT",
"version": "v4"
},
{
"c... | 2020-07-15 | [
[
"Ernazarov",
"K. K.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | We consider a $D$-dimensional Einstein-Gauss-Bonnet model with a cosmological term $\Lambda$ and two non-zero constants: $\alpha_1$ and $\alpha_2$. We restrict the metrics to be diagonal ones and study a class of solutions with exponential time dependence of three scale factors, governed by three non-coinciding Hubble-... |
1206.5187 | Horst R. Beyer | Horst Reinhard Beyer, Miguel Alcubierre, Miguel Megevand, Juan Carlos
Degollado | Stability study of a model for the Klein-Gordon equation in Kerr
spacetime | Updated version, after minor changes | null | 10.1007/s10714-012-1470-0 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The current early stage in the investigation of the stability of the Kerr
metric is characterized by the study of appropriate model problems.
Particularly interesting is the problem of the stability of the solutions of
the Klein-Gordon equation, describing the propagation of a scalar field of mass
$\mu$ in the backgr... | [
{
"created": "Fri, 22 Jun 2012 15:59:31 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2012 11:17:22 GMT",
"version": "v2"
}
] | 2012-11-20 | [
[
"Beyer",
"Horst Reinhard",
""
],
[
"Alcubierre",
"Miguel",
""
],
[
"Megevand",
"Miguel",
""
],
[
"Degollado",
"Juan Carlos",
""
]
] | The current early stage in the investigation of the stability of the Kerr metric is characterized by the study of appropriate model problems. Particularly interesting is the problem of the stability of the solutions of the Klein-Gordon equation, describing the propagation of a scalar field of mass $\mu$ in the backgrou... |
0903.4717 | Andrew J. S. Hamilton | Andrew J S Hamilton, Gavin Polhemus (JILA) | The edge of locality: visualizing a black hole from the inside | 11 figures. Visualization at
http://casa.colorado.edu/~ajsh/insidebh/schw.html | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We illustrate and discuss the view seen by an observer inside the horizon of
a Schwarzschild black hole. The view as the observer approaches the central
singularity is of particular interest because, according to ideas arising from
"observer complementarity," points in opposite directions along the observer's
past li... | [
{
"created": "Fri, 27 Mar 2009 00:48:27 GMT",
"version": "v1"
}
] | 2009-03-30 | [
[
"Hamilton",
"Andrew J S",
"",
"JILA"
],
[
"Polhemus",
"Gavin",
"",
"JILA"
]
] | We illustrate and discuss the view seen by an observer inside the horizon of a Schwarzschild black hole. The view as the observer approaches the central singularity is of particular interest because, according to ideas arising from "observer complementarity," points in opposite directions along the observer's past ligh... |
2108.01596 | Alexander E Pavlov | Alexander E. Pavlov | Extrapolation of Hubble Curves | 8 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We present exact solutions to the Friedmann equation in coordinate time and
conformal time in elliptic Legendre integrals. Both approaches describe the
modern Hubble diagram with the same accuracy. Hubble curves are extrapolated
for large redshift values.
| [
{
"created": "Tue, 3 Aug 2021 16:04:12 GMT",
"version": "v1"
}
] | 2021-08-04 | [
[
"Pavlov",
"Alexander E.",
""
]
] | We present exact solutions to the Friedmann equation in coordinate time and conformal time in elliptic Legendre integrals. Both approaches describe the modern Hubble diagram with the same accuracy. Hubble curves are extrapolated for large redshift values. |
gr-qc/9407007 | Dominik Schwarz | Dominik J. Schwarz | Exact Solutions for Cosmological Perturbations with Collisionless Matter | 4 pp., LaTeX, 2 figures (postscript), TUW-94-11 | null | 10.1007/3-540-60024-8_96 | null | gr-qc astro-ph | null | All regular and singular cosmological perturbations in a radiation dominated
Einstein-de Sitter Universe with collisionless particles can be found by a
generalized power series ansatz. Talk given at "Birth of the Universe and
Fundamental Physics", May 1994 (Rome).
| [
{
"created": "Mon, 11 Jul 1994 16:04:50 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Schwarz",
"Dominik J.",
""
]
] | All regular and singular cosmological perturbations in a radiation dominated Einstein-de Sitter Universe with collisionless particles can be found by a generalized power series ansatz. Talk given at "Birth of the Universe and Fundamental Physics", May 1994 (Rome). |
2112.07310 | Titus K Mathew | Nandhida Krishnan.P and Titus K Mathew | Barrow Holographic Dark Energy Model with GO Cut-off -- An Alternative
Perspective | 20 pages, 11 figures | Int. J. Mod. Phys. D 31 (2022) 2250107 | 10.1142/S0218271822501073 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Recently, Barrow holographic dark energy (BHDE), based on Barrow entropy, has
been proposed to describe the late acceleration of the universe. Contrary to
the earlier analysis of this model in the literature, we consider the BHDE with
the Granda-Oliveros length as IR cut-off, as a dynamical vacuum, having a
constant ... | [
{
"created": "Tue, 14 Dec 2021 11:31:34 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2023 09:19:29 GMT",
"version": "v2"
}
] | 2023-02-06 | [
[
"P",
"Nandhida Krishnan.",
""
],
[
"Mathew",
"Titus K",
""
]
] | Recently, Barrow holographic dark energy (BHDE), based on Barrow entropy, has been proposed to describe the late acceleration of the universe. Contrary to the earlier analysis of this model in the literature, we consider the BHDE with the Granda-Oliveros length as IR cut-off, as a dynamical vacuum, having a constant eq... |
gr-qc/9311008 | null | Jos\'e P. S. Lemos and Paulo M. S\'a | The Black Holes of a General Two-Dimensional Dilaton Gravity Theory | 27 pages (25 figures), LaTex, Lisbon preprint DF/IST-9.93 and Univ.
of Algarve preprint UATP-93/05 | Phys.Rev.D51:2897-2908,1994; Erratum-idib.D51:5967-5968,1995;
Phys.Rev.D51:5967-5968,1995 | 10.1103/PhysRevD.49.2897 | null | gr-qc | null | A general dilaton gravity theory in 1+1 spacetime dimensions with a
cosmological constant $\lambda$ and a new dimensionless parameter $\omega$,
contains as special cases the constant curvature theory of Teitelboim and
Jackiw, the theory equivalent to vacuum planar General Relativity, the first
order string theory, an... | [
{
"created": "Fri, 5 Nov 1993 19:09:01 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Lemos",
"José P. S.",
""
],
[
"Sá",
"Paulo M.",
""
]
] | A general dilaton gravity theory in 1+1 spacetime dimensions with a cosmological constant $\lambda$ and a new dimensionless parameter $\omega$, contains as special cases the constant curvature theory of Teitelboim and Jackiw, the theory equivalent to vacuum planar General Relativity, the first order string theory, and ... |
2312.11322 | Vegard Undheim Mr. | Vegard Undheim, Alex Bentley Nielsen and Eirik Eik Svanes | 1PN effective binary Lagrangian for the gravity-Kalb-Ramond sector in
the conservative regime | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Within the framework of string theory, a number of new fields are possible
correcting the Einstein-Hilbert action, including a Kalb-Ramond two-form field.
In this work we derive explicitly first order relativistic corrections to
conservative dynamics with a Kalb-Ramond field, using the effective field
theory approach... | [
{
"created": "Mon, 18 Dec 2023 16:17:46 GMT",
"version": "v1"
}
] | 2023-12-19 | [
[
"Undheim",
"Vegard",
""
],
[
"Nielsen",
"Alex Bentley",
""
],
[
"Svanes",
"Eirik Eik",
""
]
] | Within the framework of string theory, a number of new fields are possible correcting the Einstein-Hilbert action, including a Kalb-Ramond two-form field. In this work we derive explicitly first order relativistic corrections to conservative dynamics with a Kalb-Ramond field, using the effective field theory approach. ... |
1801.05640 | Amitabh Virmani | Sk Jahanur Hoque and Amitabh Virmani | On Propagation of Energy Flux in de Sitter Spacetime | 22 pages, 1 figure; v2: typos removed, minor changes | Gen.Rel.Grav. 50 (2018) no.4, 40 | 10.1007/s10714-018-2359-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we explore propagation of energy flux in the future Poincar\'e
patch of de Sitter spacetime. We present two results. First, we compute the
flux integral of energy using the symplectic current density of the covariant
phase space approach on hypersurfaces of constant radial physical distance.
Using this... | [
{
"created": "Wed, 17 Jan 2018 12:39:13 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2018 04:43:59 GMT",
"version": "v2"
}
] | 2018-12-24 | [
[
"Hoque",
"Sk Jahanur",
""
],
[
"Virmani",
"Amitabh",
""
]
] | In this paper, we explore propagation of energy flux in the future Poincar\'e patch of de Sitter spacetime. We present two results. First, we compute the flux integral of energy using the symplectic current density of the covariant phase space approach on hypersurfaces of constant radial physical distance. Using this c... |
gr-qc/9402027 | Neil Cornish | N. J. Cornish, C. P. Dettmann and N. E. Frankel | Fractal basins and chaotic trajectories in multi-black hole space-times | 9 pages, RevTeX, 4 figures (appended as a compressed tar file),
UTPT-93-32, UM-P-94/18 | Phys.Rev.D50:618-621,1994 | 10.1103/PhysRevD.50.R618 | null | gr-qc | null | We investigate the phase-space for trajectories in multi-black hole
spacetimes. We find that complete, chaotic geodesics are well described by
Lyapunov exponents, and that the attractor basin boundary scales as a fractal
in a diffeomorphism invariant manner.
| [
{
"created": "Mon, 14 Feb 1994 21:13:33 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Cornish",
"N. J.",
""
],
[
"Dettmann",
"C. P.",
""
],
[
"Frankel",
"N. E.",
""
]
] | We investigate the phase-space for trajectories in multi-black hole spacetimes. We find that complete, chaotic geodesics are well described by Lyapunov exponents, and that the attractor basin boundary scales as a fractal in a diffeomorphism invariant manner. |
gr-qc/0701019 | Remo Garattini | Remo Garattini | Self sustained traversable wormholes and the equation of state | Uses RevTeX 4. 21 pages. Submitted to Classical and Quantum Gravity.
Extended version of the talk given at ERE2006 (Palma de Mallorca, September
4-8, 2006) and of the talk given at MG11-GT5, Berlin, 23-29 July, 2006 | Class.Quant.Grav.24:1189-1210,2007 | 10.1088/0264-9381/24/5/009 | null | gr-qc astro-ph hep-th | null | We compute the graviton one loop contribution to a classical energy in a
\textit{traversable} wormhole background. The form of the shape function
considered is obtained by the equation of state $p=\omega\rho$. We investigate
the size of the wormhole as a function of the parameter $\omega$. The
investigation is evalua... | [
{
"created": "Tue, 2 Jan 2007 15:30:47 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Garattini",
"Remo",
""
]
] | We compute the graviton one loop contribution to a classical energy in a \textit{traversable} wormhole background. The form of the shape function considered is obtained by the equation of state $p=\omega\rho$. We investigate the size of the wormhole as a function of the parameter $\omega$. The investigation is evaluate... |
1801.01351 | Tatyana P. Shestakova | T. P. Shestakova | Is the Wheeler -- DeWitt equation more fundamental than the
Schr\"odinger equation? | 13 pages, no figures, the extended version of the talk at the 3rd
International Conference on Particle Physics and Astrophysics, Moscow, 2-5
October 2017 | Int. J. Mod. Phys. D27 (2018) 1841004 | 10.1142/S0218271818410043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Wheeler -- DeWitt equation was proposed 50 years ago and until now it is
the cornerstone of most approaches to quantization of gravity. One can find in
the literature the opinion that the Wheeler -- DeWitt equation is even more
fundamental than the basic equation of quantum theory, the Schr\"odinger
equation. We ... | [
{
"created": "Thu, 4 Jan 2018 13:52:43 GMT",
"version": "v1"
}
] | 2018-01-08 | [
[
"Shestakova",
"T. P.",
""
]
] | The Wheeler -- DeWitt equation was proposed 50 years ago and until now it is the cornerstone of most approaches to quantization of gravity. One can find in the literature the opinion that the Wheeler -- DeWitt equation is even more fundamental than the basic equation of quantum theory, the Schr\"odinger equation. We st... |
1504.03412 | Emre Kahya Dr. | E.O. Kahya, B. Pourhassan and S. Uraz | Constructing an Inflaton Potential by Mimicking Modified Chaplygin Gas | null | Phys. Rev. D 92, 103511 (2015) | 10.1103/PhysRevD.92.103511 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we considered an inflationary model that effectively behaves
as a modified Chaplygin gas in the context of quintessence cosmology. We
reconstructed the inflaton potential bottom-up and using the recent
observational data we fixed the free parameters of the model. We showed that
the modified Chaplygin g... | [
{
"created": "Tue, 14 Apr 2015 03:23:44 GMT",
"version": "v1"
}
] | 2015-11-18 | [
[
"Kahya",
"E. O.",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Uraz",
"S.",
""
]
] | In this paper, we considered an inflationary model that effectively behaves as a modified Chaplygin gas in the context of quintessence cosmology. We reconstructed the inflaton potential bottom-up and using the recent observational data we fixed the free parameters of the model. We showed that the modified Chaplygin gas... |
1202.2976 | Alf Tang | Alf Tang, Timothy J. Sumner | Removing the trend of drift induced from acceleration noise for LISA | 12 pages, 6 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we demonstrate a methodology to remove the power of the drift
induced from random acceleration on LISA proof mass in the frequency domain.
The drift must be cleaned from LISA time series data in advance of any further
analysis. The cleaning is usually performed in the time domain by using a
quadratic fu... | [
{
"created": "Tue, 14 Feb 2012 09:54:10 GMT",
"version": "v1"
}
] | 2012-02-15 | [
[
"Tang",
"Alf",
""
],
[
"Sumner",
"Timothy J.",
""
]
] | In this paper we demonstrate a methodology to remove the power of the drift induced from random acceleration on LISA proof mass in the frequency domain. The drift must be cleaned from LISA time series data in advance of any further analysis. The cleaning is usually performed in the time domain by using a quadratic func... |
2112.15387 | Seth Asante | Seth K. Asante, Bianca Dittrich, Jos\'e Padua-Arg\"uelles | Complex actions and causality violations: Applications to Lorentzian
quantum cosmology | 34 pages, 11 figures; very minor changes | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the construction of the Lorentzian path integral for gravity one faces
two main questions: Firstly, what configurations to include, in particular
whether to allow Lorentzian metrics that violate causality conditions. And
secondly, how to evaluate a highly oscillatory path integral over unbounded
domains. Relying ... | [
{
"created": "Fri, 31 Dec 2021 11:05:22 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2022 08:29:12 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Mar 2022 18:40:15 GMT",
"version": "v3"
}
] | 2022-03-03 | [
[
"Asante",
"Seth K.",
""
],
[
"Dittrich",
"Bianca",
""
],
[
"Padua-Argüelles",
"José",
""
]
] | For the construction of the Lorentzian path integral for gravity one faces two main questions: Firstly, what configurations to include, in particular whether to allow Lorentzian metrics that violate causality conditions. And secondly, how to evaluate a highly oscillatory path integral over unbounded domains. Relying on... |
gr-qc/9912116 | Irina Dymnikowa | Irina Dymnikova | The algebraic structure of a cosmological term in spherically symmetric
solutions | 5 pages Revtex, 5 figures; accepted to Phys.Lett.B | Phys.Lett.B472:33-38,2000 | 10.1016/S0370-2693(99)01374-X | null | gr-qc | null | We propose to describe the dynamics of a cosmological term in the spherically
symmetric case by an r-dependent second rank symmetric tensor invariant under
boosts in the radial direction. This proposal is based on the Petrov
classification scheme and Einstein field equations in the spherically symmetric
case. The inf... | [
{
"created": "Wed, 29 Dec 1999 13:08:52 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Dymnikova",
"Irina",
""
]
] | We propose to describe the dynamics of a cosmological term in the spherically symmetric case by an r-dependent second rank symmetric tensor invariant under boosts in the radial direction. This proposal is based on the Petrov classification scheme and Einstein field equations in the spherically symmetric case. The infla... |
gr-qc/9710103 | E. Zafiris | E. Zafiris (Imperial College, London) | Incorporation of Spacetime Symmetries in Einstein's Field Equations | 41 pages, LaTeX | J.Math.Phys.38:5854-5877,1997 | 10.1063/1.532170 | Imperial College preprint 96-97/06 | gr-qc | null | In the search for exact solutions to Einstein's field equations the main
simplification tool is the introduction of spacetime symmetries. Motivated by
this fact we develop a method to write the field equations for general matter
in a form that fully incorporates the character of the symmetry. The method is
being expr... | [
{
"created": "Tue, 21 Oct 1997 22:01:32 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Zafiris",
"E.",
"",
"Imperial College, London"
]
] | In the search for exact solutions to Einstein's field equations the main simplification tool is the introduction of spacetime symmetries. Motivated by this fact we develop a method to write the field equations for general matter in a form that fully incorporates the character of the symmetry. The method is being expres... |
gr-qc/0309078 | Carlos Molina Mendes | C. Molina, E. Abdalla and A. Saa | Field propagation in the Schwarzschild-de Sitter black hole | This manuscript has been merged into gr-qc/0309079. The combined
version is accepted for publication in Phys. Rev. D | null | null | null | gr-qc astro-ph hep-th | null | We present an exhaustive analysis of scalar, electromagnetic and
gravitational perturbations in the background of a Schwarzchild-de Sitter
spacetime. The field propagation is considered by means of a semi-analytical
(WKB) approach and two numerical schemes: the characteristic and general
initial value integrations. T... | [
{
"created": "Wed, 17 Sep 2003 18:28:02 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Feb 2004 01:51:10 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Molina",
"C.",
""
],
[
"Abdalla",
"E.",
""
],
[
"Saa",
"A.",
""
]
] | We present an exhaustive analysis of scalar, electromagnetic and gravitational perturbations in the background of a Schwarzchild-de Sitter spacetime. The field propagation is considered by means of a semi-analytical (WKB) approach and two numerical schemes: the characteristic and general initial value integrations. The... |
1212.6430 | Saugata Chatterjee | Saugata Chatterjee, Damien A. Easson, and Maulik Parikh | Energy Conditions in Jordan Frame | This version to be published in CQG | Class. Quantum Grav. 30 (2013) 235031 | 10.1088/0264-9381/30/23/235031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null energy condition, in its usual form, can appear to be violated by
transformations in the conformal frame of the metric. We propose a
generalization of the form of the null energy condition to Jordan frame, in
which matter is non-minimally coupled, which reduces to the familiar form in
Einstein frame. Using o... | [
{
"created": "Thu, 27 Dec 2012 20:59:58 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Oct 2013 18:09:54 GMT",
"version": "v2"
}
] | 2013-12-03 | [
[
"Chatterjee",
"Saugata",
""
],
[
"Easson",
"Damien A.",
""
],
[
"Parikh",
"Maulik",
""
]
] | The null energy condition, in its usual form, can appear to be violated by transformations in the conformal frame of the metric. We propose a generalization of the form of the null energy condition to Jordan frame, in which matter is non-minimally coupled, which reduces to the familiar form in Einstein frame. Using our... |
2108.11658 | Lucas Gardai Collodel | Lucas G. Collodel, Daniela D. Doneva and Stoytcho S. Yazadjiev | Equatorial extreme-mass-ratio inspirals in Kerr black holes with scalar
hair spacetimes | null | null | 10.1103/PhysRevD.105.044036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we analyze some judiciously chosen solutions of Kerr Black Holes
with Scalar Hair (KBHsSH) of special interest for Gravitational Wave (GW)
events originated from Extreme Mass Ratio Inspirals (EMRIs). Because of the
off-center distribution of energy density, these spacetimes are warped in such
a way that ... | [
{
"created": "Thu, 26 Aug 2021 08:55:20 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jan 2022 07:17:22 GMT",
"version": "v2"
}
] | 2022-02-21 | [
[
"Collodel",
"Lucas G.",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In this work we analyze some judiciously chosen solutions of Kerr Black Holes with Scalar Hair (KBHsSH) of special interest for Gravitational Wave (GW) events originated from Extreme Mass Ratio Inspirals (EMRIs). Because of the off-center distribution of energy density, these spacetimes are warped in such a way that no... |
2206.09555 | Youngone Lee | Hyeong-Chan Kim and Youngone Lee | Heat conduction in general relativity | 19 pages, 1 figure | Class. Quantum Grav. 39 245011 (2022) | 10.1088/1361-6382/aca1a1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the problem of heat conduction in general relativity by using
Carter's variational formulation. We write the creation rates of the entropy
and the particle as combinations of the vorticities of temperature and chemical
potential. We pay attention to the fact that there are two additional degrees
of freedom i... | [
{
"created": "Mon, 20 Jun 2022 03:43:29 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Lee",
"Youngone",
""
]
] | We study the problem of heat conduction in general relativity by using Carter's variational formulation. We write the creation rates of the entropy and the particle as combinations of the vorticities of temperature and chemical potential. We pay attention to the fact that there are two additional degrees of freedom in ... |
2007.12545 | Lior M. Burko | Lior M. Burko and Gaurav Khanna | Climbing up the memory staircase: Equatorial zoom-whirl orbits | 10 pages, 10 figures | Phys. Rev. D 102, 084035 (2020) | 10.1103/PhysRevD.102.084035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear, or null gravitational memory effect for zoom-whirl orbits
around fast spinning Kerr black holes for extreme mass ratio systems has a
staircase structure. The latter is characterized by a periodic fast increase in
the memory during the whirl phases of the orbit, and near constant levels when
the orbit i... | [
{
"created": "Fri, 24 Jul 2020 14:51:38 GMT",
"version": "v1"
}
] | 2020-10-21 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
]
] | The nonlinear, or null gravitational memory effect for zoom-whirl orbits around fast spinning Kerr black holes for extreme mass ratio systems has a staircase structure. The latter is characterized by a periodic fast increase in the memory during the whirl phases of the orbit, and near constant levels when the orbit is ... |
2405.14638 | Mario Pitschmann | Hauke Fischer, Christian K\"ading and Mario Pitschmann | Screened Scalar Fields in the Laboratory and the Solar System | 24 pages, 5 figures | Universe 2024, 10(7), 297 | 10.3390/universe10070297 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | The last few decades have provided abundant evidence for physics beyond the
two standard models of particle physics and cosmology. As is now known, the by
far largest part of our universe's matter/energy content lies in the `dark' and
consists of dark energy and dark matter. Despite intensive efforts on the
experimen... | [
{
"created": "Thu, 23 May 2024 14:42:11 GMT",
"version": "v1"
}
] | 2024-07-16 | [
[
"Fischer",
"Hauke",
""
],
[
"Käding",
"Christian",
""
],
[
"Pitschmann",
"Mario",
""
]
] | The last few decades have provided abundant evidence for physics beyond the two standard models of particle physics and cosmology. As is now known, the by far largest part of our universe's matter/energy content lies in the `dark' and consists of dark energy and dark matter. Despite intensive efforts on the experimenta... |
gr-qc/0512036 | Narayan Banerjee | Narayan Banerjee and Sudipta Das | Spintessence: a possible candidate as a driver of the late time cosmic
acceleration | 5 pages, no figure. Accepted for publication in Astrophysics and
Space Science | Astrophys.Space Sci.305:25-27,2006 | 10.1007/s10509-005-9033-4 | null | gr-qc | null | In this paper, it is shown completely analytically that a spintessence model
can very well serve the purpose of providing an early deceleration and the
present day acceleration.
| [
{
"created": "Tue, 6 Dec 2005 06:10:13 GMT",
"version": "v1"
}
] | 2009-09-01 | [
[
"Banerjee",
"Narayan",
""
],
[
"Das",
"Sudipta",
""
]
] | In this paper, it is shown completely analytically that a spintessence model can very well serve the purpose of providing an early deceleration and the present day acceleration. |
1812.05169 | Mauricio Bellini | Mauricio Bellini (IFIMAR - CONICET & Univ. Nac. de Mar del Plata),
Jos\'e Edgar Madriz Aguilar (Univ. de Guadalajara), Mariana Montes (Univ. de
Guadalajara), Pablo Alejandro S\'anchez (Univ. Nac. de Mar del Plata) | Relativistic quantum geometry from a 5D geometrical vacuum:
gravitational waves from preinflation | Version accepted in Phys. Dark Univ. (19 pages, 1 figure) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we introduce Relativistic Quantum Geometry (RQG) on a Modern
Kaluza-Klein theory by studying the boundary conditions on a extended
Einstein-Hilbert action for a 5D vacuum defined on a 5D (background) Riemannian
manifold. We introduce a connection which describes a displacement from the
background manifol... | [
{
"created": "Wed, 12 Dec 2018 21:48:49 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Apr 2019 12:18:08 GMT",
"version": "v2"
}
] | 2019-04-19 | [
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONICET & Univ. Nac. de Mar del Plata"
],
[
"Aguilar",
"José Edgar Madriz",
"",
"Univ. de Guadalajara"
],
[
"Montes",
"Mariana",
"",
"Univ. de\n Guadalajara"
],
[
"Sánchez",
"Pablo Alejandro",
"",
"Un... | In this work we introduce Relativistic Quantum Geometry (RQG) on a Modern Kaluza-Klein theory by studying the boundary conditions on a extended Einstein-Hilbert action for a 5D vacuum defined on a 5D (background) Riemannian manifold. We introduce a connection which describes a displacement from the background manifold ... |
gr-qc/0606136 | George Sparling | Dana Mihai, George A.J. Sparling | The Null Decomposition of Conformal Algebras | 31 pages | J.Math.Phys.48:053503,2007 | 10.1063/1.2722534 | null | gr-qc | null | We analyze the decomposition of the enveloping algebra of the conformal
algebra in arbitrary dimension with respect to the mass-squared operator. It
emerges that the subalgebra that commutes with the mass-squared is generated by
its Poincare subalgebra together with a vector operator. The special cases of
the conform... | [
{
"created": "Fri, 30 Jun 2006 19:16:29 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Jul 2006 17:26:36 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mihai",
"Dana",
""
],
[
"Sparling",
"George A. J.",
""
]
] | We analyze the decomposition of the enveloping algebra of the conformal algebra in arbitrary dimension with respect to the mass-squared operator. It emerges that the subalgebra that commutes with the mass-squared is generated by its Poincare subalgebra together with a vector operator. The special cases of the conformal... |
2406.03457 | Loris Amalberti | Loris Amalberti, Zixin Yang and Rafael A. Porto | Gravitational radiation from inspiralling compact binaries to N$^3$LO in
the Effective Field Theory approach | 18 pages, 9 figures, 1 computer-readable ancillary file | null | null | DESY-24-084 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Within the context of the Effective Field Theory (EFT) framework to
gravitational dynamics, we compute the Hamiltonian, source quadrupole moment,
and gravitational-wave energy flux for (non-spinning) inspiralling compact
binaries at next-to-next-to-next-to leading order (N$^3$LO) in the
Post-Newtonian (PN) expansion.... | [
{
"created": "Wed, 5 Jun 2024 17:01:55 GMT",
"version": "v1"
}
] | 2024-06-06 | [
[
"Amalberti",
"Loris",
""
],
[
"Yang",
"Zixin",
""
],
[
"Porto",
"Rafael A.",
""
]
] | Within the context of the Effective Field Theory (EFT) framework to gravitational dynamics, we compute the Hamiltonian, source quadrupole moment, and gravitational-wave energy flux for (non-spinning) inspiralling compact binaries at next-to-next-to-next-to leading order (N$^3$LO) in the Post-Newtonian (PN) expansion. W... |
2201.05174 | Cormac Breen | Peter Taylor, Cormac Breen, Adrian Ottewill | A mode-sum prescription for the renormalized stress energy tensor on
black hole spacetimes | 8 pages, 4 figures. Paper has been extended with further discussion
and results added. Published in Physical Review D | Physical Review D 106, 065023 (2022) | 10.1103/PhysRevD.106.065023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we describe an extremely efficient method for computing the
renormalized stress-energy tensor of a quantum scalar field in
spherically-symmetric black hole spacetimes. The method applies to a scalar
field with arbitrary field parameters. We demonstrate the utility of the method
by computing the renorma... | [
{
"created": "Thu, 13 Jan 2022 19:01:29 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2022 10:39:42 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Oct 2022 13:56:48 GMT",
"version": "v3"
}
] | 2022-10-04 | [
[
"Taylor",
"Peter",
""
],
[
"Breen",
"Cormac",
""
],
[
"Ottewill",
"Adrian",
""
]
] | In this paper, we describe an extremely efficient method for computing the renormalized stress-energy tensor of a quantum scalar field in spherically-symmetric black hole spacetimes. The method applies to a scalar field with arbitrary field parameters. We demonstrate the utility of the method by computing the renormali... |
1002.1913 | Simone Calogero | Simone Calogero, J. Mark Heinzle | On closed cosmological models that satisfy the strong energy condition
but do not recollapse | 5 pages, 1 figure | Phys. Rev. D 81, 023520 (2010) | 10.1103/PhysRevD.81.023520 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show the existence of a rather general class of closed cosmological models
of Bianchi type IX that do not exhibit recollapse but expand for all times.
This is despite the fact that these models satisfy the strong energy condition
by a wide margin.
| [
{
"created": "Tue, 9 Feb 2010 16:47:39 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Calogero",
"Simone",
""
],
[
"Heinzle",
"J. Mark",
""
]
] | We show the existence of a rather general class of closed cosmological models of Bianchi type IX that do not exhibit recollapse but expand for all times. This is despite the fact that these models satisfy the strong energy condition by a wide margin. |
1402.6823 | Naoki Tsukamoto | Naoki Tsukamoto, Takao Kitamura, Koki Nakajima, Hideki Asada | Gravitational lensing in Tangherlini spacetime in the weak gravitational
field and the strong gravitational field | 10 pages, 2 figures, minor correction, accepted for publication in
Physical Review D | Phys.Rev.D90:064043,2014 | 10.1103/PhysRevD.90.064043 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational lensing effects in the weak gravitational field by exotic
lenses have been investigated intensively to find nonluminous exotic objects.
Gravitational lensing based on 1/r^n fall-off metric, as a one-parameter model
that can treat by hand both the Schwarzschild lens (n=1) and the Ellis wormhole
(n=2)... | [
{
"created": "Thu, 27 Feb 2014 08:35:15 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Sep 2014 18:00:45 GMT",
"version": "v2"
}
] | 2014-09-25 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Kitamura",
"Takao",
""
],
[
"Nakajima",
"Koki",
""
],
[
"Asada",
"Hideki",
""
]
] | The gravitational lensing effects in the weak gravitational field by exotic lenses have been investigated intensively to find nonluminous exotic objects. Gravitational lensing based on 1/r^n fall-off metric, as a one-parameter model that can treat by hand both the Schwarzschild lens (n=1) and the Ellis wormhole (n=2) i... |
gr-qc/9906002 | Tony Rothman | Tony Rothman | A Phase Space Approach to Gravitational Enropy | Talk delivered at South African Relativistic Cosmology Symposium, Feb
1999. Some new results over Rothman and Anninos 97. To appear in GRG, 17
pages | Gen.Rel.Grav. 32 (2000) 1185-1196 | 10.1023/A:1001938114706 | null | gr-qc | null | We examine the definition S = ln Omega as a candidate "gravitational entropy"
function. We calculate its behavior for gravitationl and density perturbations
in closed, open and flat cosmologies and find that in all cases it increases
monotonically. Using the formalism to calculate the gravitational entropy
produced d... | [
{
"created": "Tue, 1 Jun 1999 12:36:07 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Rothman",
"Tony",
""
]
] | We examine the definition S = ln Omega as a candidate "gravitational entropy" function. We calculate its behavior for gravitationl and density perturbations in closed, open and flat cosmologies and find that in all cases it increases monotonically. Using the formalism to calculate the gravitational entropy produced dur... |
1708.07997 | Vyshnav Mohan | Vyshnav Mohan | Back-reaction of quantum processes and modified gravitational dynamics | 7 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we seek to find a modified theory of gravity that accounts for
the back-reaction of QED on curved spacetime. It is already known that vacuum
fluctuations induce interactions between gravity and photons. An effective
action for electromagnetism, which encodes the details of such quantum process,
is util... | [
{
"created": "Sat, 26 Aug 2017 17:07:21 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Aug 2017 12:07:52 GMT",
"version": "v2"
}
] | 2017-08-30 | [
[
"Mohan",
"Vyshnav",
""
]
] | In this paper, we seek to find a modified theory of gravity that accounts for the back-reaction of QED on curved spacetime. It is already known that vacuum fluctuations induce interactions between gravity and photons. An effective action for electromagnetism, which encodes the details of such quantum process, is utiliz... |
2205.03091 | Davide Astesiano | Davide Astesiano, Matteo Luca Ruggiero | Galactic dark matter effects from purely geometrical aspects of General
Relativity | 28 pages, 0 figures, Accepted for publication in PRD | Phys. Rev. D 106, 044061 (2022) | 10.1103/PhysRevD.106.044061 | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We study disc galaxies in the framework of General Relativity to focus on the
possibility that, even in the low energy limit, there are relevant corrections
with respect to the purely Newtonian approach. Our analysis encompasses the
model both considering a low energy expansion and exact solutions, making it
clear th... | [
{
"created": "Fri, 6 May 2022 09:13:56 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Aug 2022 16:32:48 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Aug 2022 18:22:18 GMT",
"version": "v3"
}
] | 2022-08-31 | [
[
"Astesiano",
"Davide",
""
],
[
"Ruggiero",
"Matteo Luca",
""
]
] | We study disc galaxies in the framework of General Relativity to focus on the possibility that, even in the low energy limit, there are relevant corrections with respect to the purely Newtonian approach. Our analysis encompasses the model both considering a low energy expansion and exact solutions, making it clear the ... |
2108.04998 | Francisco A. Brito | M. A. Anacleto, J. A. V. Campos, F. A. Brito, E. Passos | Quasinormal modes and shadow of a Schwarzschild black hole with GUP | 14 pages, 7 figures, matches version published in Annals of Physics | Annals Phys. 434 (2021) 168662 | 10.1016/j.aop.2021.168662 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider quantum corrections for the Schwarzschild black hole metric by
using the generalized uncertainty principle (GUP) to investigate quasinormal
modes, shadow and their relationship in the eikonal limit. We calculate the
quasinormal frequencies of the quantum-corrected Schwarzschild black hole by
using the six... | [
{
"created": "Wed, 11 Aug 2021 02:41:25 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Nov 2021 06:51:23 GMT",
"version": "v2"
}
] | 2021-11-15 | [
[
"Anacleto",
"M. A.",
""
],
[
"Campos",
"J. A. V.",
""
],
[
"Brito",
"F. A.",
""
],
[
"Passos",
"E.",
""
]
] | We consider quantum corrections for the Schwarzschild black hole metric by using the generalized uncertainty principle (GUP) to investigate quasinormal modes, shadow and their relationship in the eikonal limit. We calculate the quasinormal frequencies of the quantum-corrected Schwarzschild black hole by using the sixth... |
2011.00420 | Pardyumn Kumar Sahoo | Sanjay Mandal, Deng Wang, P.K. Sahoo | Cosmography in $f(Q)$ gravity | Revision submitted to PRD | Phys. Rev. D 102, 124029 (2020) | 10.1103/PhysRevD.102.124029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmography is an ideal tool to investigate the cosmic expansion history of
the Universe in a model-independent way. The equations of motion in modified
theories of gravity are usually very complicated; cosmography may select
practical models without imposing arbitrary choices a priori. We use the
model-independent w... | [
{
"created": "Sun, 1 Nov 2020 04:25:07 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Nov 2020 15:45:15 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Mandal",
"Sanjay",
""
],
[
"Wang",
"Deng",
""
],
[
"Sahoo",
"P. K.",
""
]
] | Cosmography is an ideal tool to investigate the cosmic expansion history of the Universe in a model-independent way. The equations of motion in modified theories of gravity are usually very complicated; cosmography may select practical models without imposing arbitrary choices a priori. We use the model-independent way... |
2305.00318 | Francesco Bajardi | Francesco Bajardi, Salvatore Capozziello | Minisuperspace quantum cosmology in $f(Q)$ gravity | 17 pages, 2 Figures. Accepted for publication in EPJC | Eur. Phys. J. C \textbf{83} (2023) no.6, 531 | 10.1140/epjc/s10052-023-11703-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | $f(Q)$ symmetric-teleparallel gravity is considered in view of Quantum
Cosmology. Specifically, we derive cosmological equations for $f(Q)$ models and
then investigate the related energy conditions. In the minisuperspace
formalism, the point-like $f(Q)$ Hamiltonian is taken into account. In this
framework, we obtain ... | [
{
"created": "Sat, 29 Apr 2023 18:16:25 GMT",
"version": "v1"
},
{
"created": "Wed, 3 May 2023 09:01:00 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Jun 2023 09:26:04 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Jul 2023 06:19:14 GMT",
"version": "v4"
}
] | 2023-07-04 | [
[
"Bajardi",
"Francesco",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | $f(Q)$ symmetric-teleparallel gravity is considered in view of Quantum Cosmology. Specifically, we derive cosmological equations for $f(Q)$ models and then investigate the related energy conditions. In the minisuperspace formalism, the point-like $f(Q)$ Hamiltonian is taken into account. In this framework, we obtain an... |
2001.03331 | Magd Elias Kahil | Magd E. Kahil | Spinning Equations for Objects of Some Classes in Finslerian Geometry | 15 LaTex pages | null | 10.1134/S0202289320030093 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spinning equations of Finslerian gravity, the counterpart of
Mathisson-Papapetrou Spinning equations of motion are obtained. Two approaches
of Finslerian geometries are illustrated, and their corresponding spinning
equations. The significance of nonlinear connection and its relevance on
spinning equations and their d... | [
{
"created": "Fri, 10 Jan 2020 07:47:39 GMT",
"version": "v1"
}
] | 2020-10-14 | [
[
"Kahil",
"Magd E.",
""
]
] | Spinning equations of Finslerian gravity, the counterpart of Mathisson-Papapetrou Spinning equations of motion are obtained. Two approaches of Finslerian geometries are illustrated, and their corresponding spinning equations. The significance of nonlinear connection and its relevance on spinning equations and their dev... |
2312.17196 | Zhengcheng Gu | Tianyao Fang and Zheng-Cheng Gu | The emergence of Einstein gravity from topological supergravity in
$3+1$D | 12 pages, no figure | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The topological aspects of Einstein gravity suggest that topological
invariance could be a more profound principle in understanding quantum gravity.
In this work, we explore a topological supergravity action that initially
describes a universe without Riemann curvature, which seems trivial. However,
we made a surpris... | [
{
"created": "Thu, 28 Dec 2023 18:29:32 GMT",
"version": "v1"
}
] | 2023-12-29 | [
[
"Fang",
"Tianyao",
""
],
[
"Gu",
"Zheng-Cheng",
""
]
] | The topological aspects of Einstein gravity suggest that topological invariance could be a more profound principle in understanding quantum gravity. In this work, we explore a topological supergravity action that initially describes a universe without Riemann curvature, which seems trivial. However, we made a surprisin... |
1707.03702 | Lorenzo Sebastiani | L. Sebastiani, S. Myrzakul, R.Myrzakulov | Warm inflation in Horndeski gravity | 13 pages, published in Gen.Rel.Grav | Gen.Rel.Grav. 49 (2017) no.7, 90 | 10.1007/s10714-017-2257-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate a class of Horndeski scalar-tensor theory of
gravity for warm inflation. We present some models where the early-time
acceleration is realized in the weak and in the strong dissipation regime.
Cosmological perturbations are analyzed.
| [
{
"created": "Tue, 11 Jul 2017 12:49:49 GMT",
"version": "v1"
}
] | 2017-07-13 | [
[
"Sebastiani",
"L.",
""
],
[
"Myrzakul",
"S.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | In this paper, we investigate a class of Horndeski scalar-tensor theory of gravity for warm inflation. We present some models where the early-time acceleration is realized in the weak and in the strong dissipation regime. Cosmological perturbations are analyzed. |
1803.10204 | Sayan Kar | S. Aneesh, Sukanta Bose and Sayan Kar | Gravitational waves from quasinormal modes of a class of Lorentzian
wormholes | 14 pages, 13 figures; some changes, corrections and additions, to
appear in Physical Review D | null | 10.1103/PhysRevD.97.124004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes of a two-parameter family of Lorentzian wormhole
spacetimes, which arise as solutions in a specific scalar-tensor theory
associated with braneworld gravity, are obtained using standard numerical
methods. Being solutions in a scalar-tensor theory, these wormholes can exist
with matter satisfying the ... | [
{
"created": "Tue, 27 Mar 2018 17:41:04 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2018 06:31:51 GMT",
"version": "v2"
}
] | 2018-07-04 | [
[
"Aneesh",
"S.",
""
],
[
"Bose",
"Sukanta",
""
],
[
"Kar",
"Sayan",
""
]
] | Quasinormal modes of a two-parameter family of Lorentzian wormhole spacetimes, which arise as solutions in a specific scalar-tensor theory associated with braneworld gravity, are obtained using standard numerical methods. Being solutions in a scalar-tensor theory, these wormholes can exist with matter satisfying the We... |
2208.01330 | Alexander C. Jenkins | Adrian Ka-Wai Chung, Alexander C. Jenkins, Joseph D. Romano, and Mairi
Sakellariadou | Targeted search for the kinematic dipole of the gravitational-wave
background | 12 pages, 3 figures, matches version published in PRD | Phys. Rev. D 106 (2022) 082005 | 10.1103/PhysRevD.106.082005 | KCL-PH-TH/2022-38 | gr-qc astro-ph.CO astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is growing interest in using current and future gravitational-wave
interferometers to search for anisotropies in the gravitational-wave
background. One guaranteed anisotropic signal is the kinematic dipole induced
by our peculiar motion with respect to the cosmic rest frame, as measured in
other full-sky observ... | [
{
"created": "Tue, 2 Aug 2022 09:39:14 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2022 17:50:24 GMT",
"version": "v2"
}
] | 2022-11-11 | [
[
"Chung",
"Adrian Ka-Wai",
""
],
[
"Jenkins",
"Alexander C.",
""
],
[
"Romano",
"Joseph D.",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | There is growing interest in using current and future gravitational-wave interferometers to search for anisotropies in the gravitational-wave background. One guaranteed anisotropic signal is the kinematic dipole induced by our peculiar motion with respect to the cosmic rest frame, as measured in other full-sky observab... |
gr-qc/0010112 | Ozay Gurtug | Ozay Gurtug and Mustafa Halilsoy | The Effect of Sources on the Inner Horizon of Black Holes | Final version to appear in PRD | Phys.Rev. D64 (2001) 084023 | 10.1103/PhysRevD.64.084023 | null | gr-qc | null | Single pulse of null dust and colliding null dusts both transform a regular
horizon into a space-like singularity in the space of colliding waves. The
local isometry between such space-times and black holes extrapolates these
results to the realm of black holes. However, inclusion of particular scalar
fields instead ... | [
{
"created": "Tue, 31 Oct 2000 14:24:24 GMT",
"version": "v1"
},
{
"created": "Wed, 9 May 2001 10:48:57 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Aug 2001 06:29:55 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Gurtug",
"Ozay",
""
],
[
"Halilsoy",
"Mustafa",
""
]
] | Single pulse of null dust and colliding null dusts both transform a regular horizon into a space-like singularity in the space of colliding waves. The local isometry between such space-times and black holes extrapolates these results to the realm of black holes. However, inclusion of particular scalar fields instead of... |
gr-qc/0310105 | Soumen Basak | Soumen Basak | Sound Wave in Vortex with Sink | 24 pages, typos corrected, parts of section 3 modified | null | null | null | gr-qc | null | Using Komar's definition, we give expressions for the mass and angular
momentum of a rotating acoustic black hole. We show that the mass and angular
momentum so defined, obey the equilibrium version of the first law of Black
Hole thermodynamics. We also show that when a phonon passes by a vortex with a
sink, its traj... | [
{
"created": "Wed, 22 Oct 2003 10:40:11 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Nov 2003 17:46:42 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Basak",
"Soumen",
""
]
] | Using Komar's definition, we give expressions for the mass and angular momentum of a rotating acoustic black hole. We show that the mass and angular momentum so defined, obey the equilibrium version of the first law of Black Hole thermodynamics. We also show that when a phonon passes by a vortex with a sink, its trajec... |
2009.03235 | Valerio Faraoni | Steve Dussault and Valerio Faraoni | A new symmetry of the spatially flat Einstein-Friedmann equations | 7 pages, no figures | null | 10.1140/epjc/s10052-020-08590-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a new symmetry of the Einstein-Friedmann equations for spatially
flat Friedmann- Lema\^itre-Robertson-Walker universes. We discuss its
application to barotropic perfect fluids and its use as a solution-generating
technique for scalar field universes.
| [
{
"created": "Mon, 7 Sep 2020 17:01:54 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Dussault",
"Steve",
""
],
[
"Faraoni",
"Valerio",
""
]
] | We report a new symmetry of the Einstein-Friedmann equations for spatially flat Friedmann- Lema\^itre-Robertson-Walker universes. We discuss its application to barotropic perfect fluids and its use as a solution-generating technique for scalar field universes. |
gr-qc/9805081 | Sardanashvily Gennadi | L.Mangiarotti and G.Sardanashvily | Relativistic and Non-relativistic Equations of Motion | 18 pages, LaTeX | null | null | CU/117/98 | gr-qc | null | It is shown that any second order dynamic equation on a configuration space
$X$ of non-relativistic time-dependent mechanics can be seen as a geodesic
equation with respect to some (non-linear) connection on the tangent bundle
$TX\to X$ of relativistic velocities. Using this fact, the relationship between
relativisti... | [
{
"created": "Thu, 21 May 1998 07:34:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mangiarotti",
"L.",
""
],
[
"Sardanashvily",
"G.",
""
]
] | It is shown that any second order dynamic equation on a configuration space $X$ of non-relativistic time-dependent mechanics can be seen as a geodesic equation with respect to some (non-linear) connection on the tangent bundle $TX\to X$ of relativistic velocities. Using this fact, the relationship between relativistic ... |
2102.10888 | Chunlong Li | Chunlong Li, Hongsheng Zhao, Yi-Fu Cai | New test on the Einstein equivalence principle through the photon ring
of black holes | 16 pages, 6 figures | Phys. Rev. D 104, 064027 (2021) | 10.1103/PhysRevD.104.064027 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | Einstein equivalence principle (EEP), as one of the foundations of general
relativity, is a fundamental test of gravity theories. In this paper, we
propose a new method to test the EEP of electromagnetic interactions through
observations of black hole photon rings, which naturally extends the scale of
Newtonian and p... | [
{
"created": "Mon, 22 Feb 2021 10:50:24 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2021 02:43:39 GMT",
"version": "v2"
}
] | 2021-09-15 | [
[
"Li",
"Chunlong",
""
],
[
"Zhao",
"Hongsheng",
""
],
[
"Cai",
"Yi-Fu",
""
]
] | Einstein equivalence principle (EEP), as one of the foundations of general relativity, is a fundamental test of gravity theories. In this paper, we propose a new method to test the EEP of electromagnetic interactions through observations of black hole photon rings, which naturally extends the scale of Newtonian and pos... |
gr-qc/0210004 | Bijaya Kumar Sahoo | B.K.Sahoo and L.P.Singh | Time Dependence of Brans-Dicke Parameter w for an Expanding Universe | 10 pages,No figures | Mod.Phys.Lett. A17 (2002) 2409 | 10.1142/S0217732302008368 | null | gr-qc | null | We have studied the time dependence of w for an expanding universe in the
generalised B-D theory and have obtained its explicit dependence on the nature
of matter contained in the universe,in different era.Lastly we discuss how the
observed accelerated expansion of the present universe can be accomodated in
the forma... | [
{
"created": "Wed, 2 Oct 2002 06:05:40 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Sahoo",
"B. K.",
""
],
[
"Singh",
"L. P.",
""
]
] | We have studied the time dependence of w for an expanding universe in the generalised B-D theory and have obtained its explicit dependence on the nature of matter contained in the universe,in different era.Lastly we discuss how the observed accelerated expansion of the present universe can be accomodated in the formali... |
1303.4651 | Endre Kajari | Michael Buser, Endre Kajari and Wolfgang P. Schleich | Visualization of the G\"odel universe | 34 pages, 20 figures, for supplementary movies and higher quality
figures please visit http://iopscience.iop.org/1367-2630/15/1/013063 | New J. Phys. 15, 013063 (2013) | 10.1088/1367-2630/15/1/013063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard model of modern cosmology, which is based on the
Friedmann-Lema\^itre-Robertson-Walker metric, allows the definition of an
absolute time. However, there exist (cosmological) models consistent with the
theory of general relativity for which such a definition cannot be given since
they offer the possibilit... | [
{
"created": "Tue, 19 Mar 2013 16:19:49 GMT",
"version": "v1"
}
] | 2013-03-20 | [
[
"Buser",
"Michael",
""
],
[
"Kajari",
"Endre",
""
],
[
"Schleich",
"Wolfgang P.",
""
]
] | The standard model of modern cosmology, which is based on the Friedmann-Lema\^itre-Robertson-Walker metric, allows the definition of an absolute time. However, there exist (cosmological) models consistent with the theory of general relativity for which such a definition cannot be given since they offer the possibility ... |
0803.2628 | Flavio Pereira | F. I. M. Pereira, R. Chan | Gravitational Collapse of a Massless Scalar Field and a Perfect Fluid
with Self-Similarity of the First Kind in (2+1) Dimensions | 13 pages | Int.J.Mod.Phys.D17:2143-2158,2008 | 10.1142/S0218271808013765 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Self-similar solutions of a collapsing perfect fluid and a massless scalar
field with kinematic self-similarity of the first kind in 2+1 dimensions are
obtained. Their local and global properties of the solutions are studied. It is
found that some of them represent gravitational collapse, in which black holes
are alw... | [
{
"created": "Tue, 18 Mar 2008 13:40:57 GMT",
"version": "v1"
}
] | 2009-02-11 | [
[
"Pereira",
"F. I. M.",
""
],
[
"Chan",
"R.",
""
]
] | Self-similar solutions of a collapsing perfect fluid and a massless scalar field with kinematic self-similarity of the first kind in 2+1 dimensions are obtained. Their local and global properties of the solutions are studied. It is found that some of them represent gravitational collapse, in which black holes are alway... |
2203.05720 | Carlos A. S. Almeida | J. E. G. Silva, R. V. Maluf, Gonzalo J. Olmo, C. A. S. Almeida | Braneworlds in $f(Q)$ gravity | 26 pages, 16 figures | null | 10.1103/PhysRevD.106.024033 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We propose a braneworld scenario in a modified symmetric teleparallel
gravitational theory, where the dynamics for the gravitational field is encoded
in the nonmetricity tensor rather than in the curvature. Assuming a single real
scalar field with a sine-Gordon self-interaction, the generalized quadratic
nonmetricity... | [
{
"created": "Fri, 11 Mar 2022 02:28:43 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Silva",
"J. E. G.",
""
],
[
"Maluf",
"R. V.",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | We propose a braneworld scenario in a modified symmetric teleparallel gravitational theory, where the dynamics for the gravitational field is encoded in the nonmetricity tensor rather than in the curvature. Assuming a single real scalar field with a sine-Gordon self-interaction, the generalized quadratic nonmetricity i... |
0709.4457 | Paul R. Anderson | Paul R. Anderson, Mathew Binkley, Hector Calderon, William A. Hiscock,
Emil Mottola, Ruslan Vaulin | Effects of quantized fields on the spacetime geometries of static
spherically symmetric black holes | 5 pages. To appear in the "Proceedings of the Eleventh Marcel
Grossmann Meeting on General Relativity", July 2006, Berlin, Germany | null | 10.1142/9789812834300_0178 | null | gr-qc | null | Analytic approximations for the stress-energy of quantized fields in the
Hartle-Hawking state in static black hole spacetimes predict divergences on the
event horizon of the black hole for a number of important cases. Such
divergences, if real, could substantially alter the spacetime geometry near the
event horizon, ... | [
{
"created": "Thu, 27 Sep 2007 17:25:19 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Anderson",
"Paul R.",
""
],
[
"Binkley",
"Mathew",
""
],
[
"Calderon",
"Hector",
""
],
[
"Hiscock",
"William A.",
""
],
[
"Mottola",
"Emil",
""
],
[
"Vaulin",
"Ruslan",
""
]
] | Analytic approximations for the stress-energy of quantized fields in the Hartle-Hawking state in static black hole spacetimes predict divergences on the event horizon of the black hole for a number of important cases. Such divergences, if real, could substantially alter the spacetime geometry near the event horizon, po... |
1401.7549 | Asrin Abdolmaleki | A. Abdolmaleki, T. Najafi, K. Karami | Generalized second law of thermodynamics in scalar-tensor gravity | 27 pages, 5 figures | Phys. Rev. D 89, 104041 (2014) | 10.1103/PhysRevD.89.104041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the context of scalar-tensor gravity, we explore the generalized
second law (GSL) of gravitational thermodynamics. We extend the action of
ordinary scalar-tensor gravity theory to the case in which there is a
non-minimal coupling between the scalar field and the matter field (as
chameleon field). Then, we deri... | [
{
"created": "Tue, 28 Jan 2014 18:34:55 GMT",
"version": "v1"
},
{
"created": "Mon, 26 May 2014 15:21:46 GMT",
"version": "v2"
}
] | 2014-05-27 | [
[
"Abdolmaleki",
"A.",
""
],
[
"Najafi",
"T.",
""
],
[
"Karami",
"K.",
""
]
] | Within the context of scalar-tensor gravity, we explore the generalized second law (GSL) of gravitational thermodynamics. We extend the action of ordinary scalar-tensor gravity theory to the case in which there is a non-minimal coupling between the scalar field and the matter field (as chameleon field). Then, we derive... |
2107.12745 | Erasmo Caponio | Erasmo Caponio and Antonio Masiello | A note on the Sagnac effect in general relativity as a Finslerian effect | AMSLaTeX, 6 pages; v3: a misprint in Eq. (3) and in the equation at
the end of the paper corrected; these two corrections are not included in the
published version | Found Phys, 52 (2022), 5 | 10.1007/s10701-021-00523-z | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometry of the Sagnac effect in a stationary region of a spacetime is
reviewed with the aim of emphasizing the role of asymmetry of a Finsler metric
defined on a spacelike hypersurface associated to a stationary splitting and
related to future-pointing null geodesics of the spacetime. We show also that
an analog... | [
{
"created": "Tue, 27 Jul 2021 11:40:37 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Dec 2021 19:21:42 GMT",
"version": "v2"
},
{
"created": "Sun, 5 Feb 2023 10:44:48 GMT",
"version": "v3"
}
] | 2023-02-07 | [
[
"Caponio",
"Erasmo",
""
],
[
"Masiello",
"Antonio",
""
]
] | The geometry of the Sagnac effect in a stationary region of a spacetime is reviewed with the aim of emphasizing the role of asymmetry of a Finsler metric defined on a spacelike hypersurface associated to a stationary splitting and related to future-pointing null geodesics of the spacetime. We show also that an analogou... |
1612.03248 | Huaifan Li | Huai-Fan Li, Meng-Sen Ma, Li-Chun Zhang, Ren Zhao | Entropy of Kerr-de Sitter black hole | 12 pages, 5 figures. arXiv admin note: text overlap with
arXiv:1610.09886 | Nucl.Phys. B920 (2017) 211-220 | 10.1016/j.nuclphysb.2017.04.013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the consideration that the black hole horizon and the cosmological
horizon of Kerr-de Sitter black hole are not independent each other, we
conjecture the total entropy of the system should have an extra term
contributed from the correlations between the two horizons, except for the sum
of the two horizon ent... | [
{
"created": "Sat, 10 Dec 2016 03:46:33 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Mar 2018 08:25:34 GMT",
"version": "v2"
}
] | 2018-03-26 | [
[
"Li",
"Huai-Fan",
""
],
[
"Ma",
"Meng-Sen",
""
],
[
"Zhang",
"Li-Chun",
""
],
[
"Zhao",
"Ren",
""
]
] | Based on the consideration that the black hole horizon and the cosmological horizon of Kerr-de Sitter black hole are not independent each other, we conjecture the total entropy of the system should have an extra term contributed from the correlations between the two horizons, except for the sum of the two horizon entro... |
1302.1887 | Hassan Bourhrous | Hassan Bourhrous | CMB Tensor Anisotropies in f(R) Gravity | MSc Dissertation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmic microwave background (CMB) carries information from the last
scattering surface that puts constraints on the multitude of proposed
cosmological models and the gravitation theories they are based on. One class
of such theories is $f(R)$ gravity, which has become an interesting endeavour
to correct for the d... | [
{
"created": "Thu, 7 Feb 2013 21:37:05 GMT",
"version": "v1"
}
] | 2013-02-11 | [
[
"Bourhrous",
"Hassan",
""
]
] | The cosmic microwave background (CMB) carries information from the last scattering surface that puts constraints on the multitude of proposed cosmological models and the gravitation theories they are based on. One class of such theories is $f(R)$ gravity, which has become an interesting endeavour to correct for the deg... |
1309.1978 | Salvatore Capozziello | Artyom V. Astashenok, Salvatore Capozziello, Sergei D. Odintsov | Further stable neutron star models from f(R) gravity | 18 pages, 17 figures, revised version significally expanded, to
appear in JCAP | null | 10.1088/1475-7516/2013/12/040 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Neutron star models in perturbative $f(R)$ gravity are considered with
realistic equations of state. In particular, we consider the FPS, SLy and other
equations of state and a case of piecewise equation of state for stars with
quark cores. The mass-radius relations for $f(R)=R+R(e^{-R/R_{0}}-1)$ model and
for $R^2$ m... | [
{
"created": "Sun, 8 Sep 2013 17:04:01 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Dec 2013 21:03:44 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | Neutron star models in perturbative $f(R)$ gravity are considered with realistic equations of state. In particular, we consider the FPS, SLy and other equations of state and a case of piecewise equation of state for stars with quark cores. The mass-radius relations for $f(R)=R+R(e^{-R/R_{0}}-1)$ model and for $R^2$ mod... |
2005.12722 | Ming Zhang | Ming Zhang, Jie Jiang, Zhen Zhong | Relaxation rate of RNdS black hole | 8 pages, to appear in PLB | null | 10.1016/j.physletb.2020.135523 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We investigate the relaxation rate of the RNdS black hole perturbed by
neutral massless scalar field in the eikonal limit. We find that the fastest
relaxation rate of the composed system increases with the cosmological constant
for all spacetime dimensions. We also find that, when the cosmological constant
decreases ... | [
{
"created": "Tue, 26 May 2020 13:47:27 GMT",
"version": "v1"
}
] | 2020-06-24 | [
[
"Zhang",
"Ming",
""
],
[
"Jiang",
"Jie",
""
],
[
"Zhong",
"Zhen",
""
]
] | We investigate the relaxation rate of the RNdS black hole perturbed by neutral massless scalar field in the eikonal limit. We find that the fastest relaxation rate of the composed system increases with the cosmological constant for all spacetime dimensions. We also find that, when the cosmological constant decreases fr... |
gr-qc/9504031 | Gregory A. Burnett | Gregory A. Burnett | Just how long can you live in a black hole and what can be done about
it? | 20 pages, REVTeX 3.0, 6 figures included, self-unpacking | Phys.Rev. D52 (1995) 5832-5849 | 10.1103/PhysRevD.52.5832 | UF-RAP-95-31 | gr-qc | null | We study the problem of how long a journey within a black hole can last.
Based on our observations, we make two conjectures. First, for observers that
have entered a black hole from an asymptotic region, we conjecture that the
length of their journey within is bounded by a multiple of the future
asymptotic ``size'' o... | [
{
"created": "Thu, 20 Apr 1995 18:56:58 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Burnett",
"Gregory A.",
""
]
] | We study the problem of how long a journey within a black hole can last. Based on our observations, we make two conjectures. First, for observers that have entered a black hole from an asymptotic region, we conjecture that the length of their journey within is bounded by a multiple of the future asymptotic ``size'' of ... |
1903.01647 | Hernando Quevedo | Hernando Quevedo, Maria N. Quevedo and Alberto Sanchez | Geometrothermodynamics of black hole binary systems | Comments and references added | null | 10.1142/S0218271820500534 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a stationary and axisymmetric binary system composed of two
identical Kerr black holes, whose physical parameters satisfy the Smarr
thermodynamic formula. Then, we use the formalism of geometrothermodynamics to
show that the spatial distance between the black holes must be considered as a
thermodynamic varia... | [
{
"created": "Tue, 5 Mar 2019 03:40:19 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Dec 2019 21:10:54 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Quevedo",
"Hernando",
""
],
[
"Quevedo",
"Maria N.",
""
],
[
"Sanchez",
"Alberto",
""
]
] | We study a stationary and axisymmetric binary system composed of two identical Kerr black holes, whose physical parameters satisfy the Smarr thermodynamic formula. Then, we use the formalism of geometrothermodynamics to show that the spatial distance between the black holes must be considered as a thermodynamic variabl... |
2303.14413 | Matsuno Satsuki | Satsuki Matsuno, Fumihiro Ueno | The exact solutions to an Einstein-Dirac-Maxwell system with Sasakian
quasi-Killing spinors on 4D spacetimes | 23 pages, 1 figure | null | null | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact solutions to an Einstein-Maxwell(E-D-M) system with an electric current
are simple models of global cosmic magnetic phenomena in the universe. In this
paper, we consider an E-D-M system with two chiral spinors $ \psi^\pm$ coupled
with a gauge field $ A$ and an electromagnetic field $F=dA$. We construct a
family... | [
{
"created": "Sat, 25 Mar 2023 09:48:46 GMT",
"version": "v1"
}
] | 2023-03-28 | [
[
"Matsuno",
"Satsuki",
""
],
[
"Ueno",
"Fumihiro",
""
]
] | Exact solutions to an Einstein-Maxwell(E-D-M) system with an electric current are simple models of global cosmic magnetic phenomena in the universe. In this paper, we consider an E-D-M system with two chiral spinors $ \psi^\pm$ coupled with a gauge field $ A$ and an electromagnetic field $F=dA$. We construct a family o... |
gr-qc/9509022 | Jeferson De Lima Tomazelli | F. Pisano and J. L. Tomazelli | Stars of WIMPs | LaTex, 08 pages, no figures | Mod.Phys.Lett. A11 (1996) 647-652 | 10.1142/S0217732396000667 | null | gr-qc | null | A class of boson-fermion stars, whose spin-0 and spin-1/2 constituents
interact through a U(1) current-current term in the Lagrangian density, is
analysed. It is shown that it describes the low-energy behavior of a system of
weakly interacting massive particles (WIMPs) from the leptonic sector of the
minimal supersym... | [
{
"created": "Mon, 11 Sep 1995 21:49:14 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Pisano",
"F.",
""
],
[
"Tomazelli",
"J. L.",
""
]
] | A class of boson-fermion stars, whose spin-0 and spin-1/2 constituents interact through a U(1) current-current term in the Lagrangian density, is analysed. It is shown that it describes the low-energy behavior of a system of weakly interacting massive particles (WIMPs) from the leptonic sector of the minimal supersymme... |
2406.08211 | Shravani Sardeshpande | Shravani Sardeshpande, Ayan Daripa | A Thermodynamic Study of $\textbf{(2+1)}$-Dimensional Analytic Charged
Hairy Black Holes with Born-Infeld Electrodynamics | 24 pages, many figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This work presents analytical black hole solutions for a coupled
Einstein-Born-Infeld-Scalar gravity system in AdS spacetime with two different
non-minimal coupling functions $f(z)$. For both solutions, we establish the
regularity of the scalar field and curvature scalars outside the horizon. For
one of the considere... | [
{
"created": "Wed, 12 Jun 2024 13:41:39 GMT",
"version": "v1"
}
] | 2024-06-13 | [
[
"Sardeshpande",
"Shravani",
""
],
[
"Daripa",
"Ayan",
""
]
] | This work presents analytical black hole solutions for a coupled Einstein-Born-Infeld-Scalar gravity system in AdS spacetime with two different non-minimal coupling functions $f(z)$. For both solutions, we establish the regularity of the scalar field and curvature scalars outside the horizon. For one of the considered ... |
gr-qc/0507131 | Filimonova Irina V | Ivanhoe B. Pestov | Energy in Theory of Gravity and Essence of Time | Plenary talk presented at Workshop on High Energy Physics&Field
Theory (Protvino, Russia, 2004) | null | null | HEPFT/2004/12 | gr-qc | null | In the framework of the field theory it is shown that a time (viewed as a
scalar temporal field) is an internal property of the physical system, which
defines its causal structure and evolution. A new concept of internal time
allows to solve the energy problem in General Relativity and predicts the
existence of matte... | [
{
"created": "Fri, 29 Jul 2005 08:19:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pestov",
"Ivanhoe B.",
""
]
] | In the framework of the field theory it is shown that a time (viewed as a scalar temporal field) is an internal property of the physical system, which defines its causal structure and evolution. A new concept of internal time allows to solve the energy problem in General Relativity and predicts the existence of matter ... |
1101.3749 | Michael Kesden | Michael Kesden | Transition from adiabatic inspiral to plunge into a spinning black hole | 9 pages, 6 figures, final version published in PRD with minor changes | Phys.Rev.D83:104011,2011 | 10.1103/PhysRevD.83.104011 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A test particle of mass mu on a bound geodesic of a Kerr black hole of mass M
>> mu will slowly inspiral as gravitational radiation extracts energy and
angular momentum from its orbit. This inspiral can be considered adiabatic when
the orbital period is much shorter than the timescale on which energy is
radiated, and... | [
{
"created": "Wed, 19 Jan 2011 18:08:11 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2011 18:18:34 GMT",
"version": "v2"
}
] | 2011-05-23 | [
[
"Kesden",
"Michael",
""
]
] | A test particle of mass mu on a bound geodesic of a Kerr black hole of mass M >> mu will slowly inspiral as gravitational radiation extracts energy and angular momentum from its orbit. This inspiral can be considered adiabatic when the orbital period is much shorter than the timescale on which energy is radiated, and q... |
1106.2040 | Horace W. Crater | Horace Crater | Is the Schwarzschild Metric a Vacuum Solution of the Einstein Equation? | 16 pages, updated | null | null | null | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper examines the inhomogeneous Einstein equation for a static
spherically symmetric metric with a source term corresponding to a perfect
fluid with p=-rho. By a careful treatment of the equation near the origin we
find an analytic solution for the metric, dependent on a small parameter
epsilon, which can be ma... | [
{
"created": "Fri, 10 Jun 2011 12:45:24 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Apr 2014 19:49:33 GMT",
"version": "v2"
}
] | 2014-04-14 | [
[
"Crater",
"Horace",
""
]
] | This paper examines the inhomogeneous Einstein equation for a static spherically symmetric metric with a source term corresponding to a perfect fluid with p=-rho. By a careful treatment of the equation near the origin we find an analytic solution for the metric, dependent on a small parameter epsilon, which can be made... |
1806.08505 | Alan Cornell | Alan S. Cornell and Gerhard E. Harmsen | Quasi-normal modes of spin-3/2 fields in $D$-dimensional
Reissner-Nordstr\"om black hole spacetimes using the continued fraction
method | 6 pages, submitted to the proceedings of the South African Institute
of Physics conference 2018 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper we calculated the field equations of spin-3/2 fields in a
$D$-dimensional Reissner-Nordstr\"om black hole spacetime whilst maintaining
the gauge symmetry of the Rarita-Schwinger equation. We were also able to
determine the quasi-normal modes of the associated gauge invariant variables
using the WKB ... | [
{
"created": "Fri, 22 Jun 2018 06:02:17 GMT",
"version": "v1"
}
] | 2018-06-25 | [
[
"Cornell",
"Alan S.",
""
],
[
"Harmsen",
"Gerhard E.",
""
]
] | In a recent paper we calculated the field equations of spin-3/2 fields in a $D$-dimensional Reissner-Nordstr\"om black hole spacetime whilst maintaining the gauge symmetry of the Rarita-Schwinger equation. We were also able to determine the quasi-normal modes of the associated gauge invariant variables using the WKB ap... |
gr-qc/0201031 | Uchida Gen | Gen Uchida and Misao Sasaki | Quantum Radion on de Sitter branes | 17 pages, no figures | Prog.Theor.Phys.108:471-494,2002 | 10.1143/PTP.108.471 | OU-TAP-170 YITP-01-94 | gr-qc astro-ph hep-th | null | The quantum fluctuation of the relative location of two (n-1)-dimensional de
Sitter branes (i.e., of n spacetime dimensions) embedded in the
(n+1)-dimensional anti-de Sitter bulk, which we shall call the quantum radion,
is investigated at the linear perturbation level. The quantization of the
radion is done by derivi... | [
{
"created": "Thu, 10 Jan 2002 07:08:58 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Uchida",
"Gen",
""
],
[
"Sasaki",
"Misao",
""
]
] | The quantum fluctuation of the relative location of two (n-1)-dimensional de Sitter branes (i.e., of n spacetime dimensions) embedded in the (n+1)-dimensional anti-de Sitter bulk, which we shall call the quantum radion, is investigated at the linear perturbation level. The quantization of the radion is done by deriving... |
1302.3232 | Hideki Maeda | Fabrizio Canfora and Hideki Maeda | Hedgehog ansatz and its generalization for self-gravitating Skyrmions | 11 pages; v2, style changed, critical typos corrected, Taub-NUT- and
Eguchi-Hanson-type solutions added, published in Physical Review D | Phys. Rev. D 87, 084049 (2013) | 10.1103/PhysRevD.87.084049 | CECS-PHY-13/02 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The hedgehog ansatz for spherically symmetric spacetimes in self-gravitating
nonlinear sigma models and Skyrme models is revisited and its generalization
for non-spherically symmetric spacetimes is proposed. The key idea behind our
construction is that, even if the matter fields depend on the Killing
coordinates in a... | [
{
"created": "Wed, 13 Feb 2013 21:03:00 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2013 04:21:02 GMT",
"version": "v2"
}
] | 2013-04-24 | [
[
"Canfora",
"Fabrizio",
""
],
[
"Maeda",
"Hideki",
""
]
] | The hedgehog ansatz for spherically symmetric spacetimes in self-gravitating nonlinear sigma models and Skyrme models is revisited and its generalization for non-spherically symmetric spacetimes is proposed. The key idea behind our construction is that, even if the matter fields depend on the Killing coordinates in a n... |
gr-qc/0702116 | Pankaj S. Joshi | Pankaj S. Joshi | On the genericity of spacetime singularities | 19 pages, To be published in the Raychaudhuri Volume, eds. Naresh
Dadhich, Pankaj Joshi and Probir Roy | Pramana69:119-136,2007 | 10.1007/s12043-007-0114-5 | null | gr-qc | null | We consider here the genericity aspects of spacetime singularities that occur
in cosmology and in gravitational collapse. The singularity theorems (that
predict the occurrence of singularities in general relativity) allow the
singularities of gravitational collapse to be either visible to external
observers or covere... | [
{
"created": "Wed, 21 Feb 2007 13:09:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Joshi",
"Pankaj S.",
""
]
] | We consider here the genericity aspects of spacetime singularities that occur in cosmology and in gravitational collapse. The singularity theorems (that predict the occurrence of singularities in general relativity) allow the singularities of gravitational collapse to be either visible to external observers or covered ... |
1101.5136 | Steven Carlip | S. Carlip | Extremal and nonextremal Kerr/CFT correspondences | v3: missing term restored in eqn. (A.10) for central term; does not
affect conclusions of this paper, but important in other contexts | null | 10.1007/JHEP04(2011)076 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I rederive the Kerr/CFT correspondence without first taking the near-horizon
extremal Kerr limit. This method extends easily to nonextremal black holes, for
which the temperature and central charge behave poorly at the horizon but the
entropy remains finite. A computation yields one-half of the standard
Bekenstein-Ha... | [
{
"created": "Wed, 26 Jan 2011 19:42:20 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2011 23:44:58 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Dec 2011 01:25:40 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Carlip",
"S.",
""
]
] | I rederive the Kerr/CFT correspondence without first taking the near-horizon extremal Kerr limit. This method extends easily to nonextremal black holes, for which the temperature and central charge behave poorly at the horizon but the entropy remains finite. A computation yields one-half of the standard Bekenstein-Hawk... |
2401.17903 | Antonio Gallerati | Giovanni A. Ummarino, Antonio Gallerati | Gravitational effects in a superconducting film struck by a laser pulse | 22 pages, 5 figures | Eur. Phys. J. C 84 (2024) 179 | 10.1140/epjc/s10052-024-12506-1 | null | gr-qc cond-mat.supr-con hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the local interaction of the gravitational field with a superfluid
condensate. To this end, we exploit the Ginzburg-Landau formalism with
generalized Maxwell fields. The analysis shows that a slight local alteration
of the gravitational field in a thin superconducting film can be achieved by
laser pulses wit... | [
{
"created": "Wed, 31 Jan 2024 15:07:46 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2024 13:02:26 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Ummarino",
"Giovanni A.",
""
],
[
"Gallerati",
"Antonio",
""
]
] | We study the local interaction of the gravitational field with a superfluid condensate. To this end, we exploit the Ginzburg-Landau formalism with generalized Maxwell fields. The analysis shows that a slight local alteration of the gravitational field in a thin superconducting film can be achieved by laser pulses with ... |
0811.4109 | Oliver Rinne | Vincent Moncrief and Oliver Rinne | Regularity of the Einstein Equations at Future Null Infinity | 43 pages, no figures, AMS-TeX. Minor revisions, updated to agree with
published version | Class.Quant.Grav.26:125010,2009 | 10.1088/0264-9381/26/12/125010 | DAMTP-2008-109 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When Einstein's equations for an asymptotically flat, vacuum spacetime are
reexpressed in terms of an appropriate conformal metric that is regular at
(future) null infinity, they develop apparently singular terms in the
associated conformal factor and thus appear to be ill-behaved at this
(exterior) boundary. In this... | [
{
"created": "Tue, 25 Nov 2008 15:25:12 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jun 2009 15:24:03 GMT",
"version": "v2"
}
] | 2009-06-01 | [
[
"Moncrief",
"Vincent",
""
],
[
"Rinne",
"Oliver",
""
]
] | When Einstein's equations for an asymptotically flat, vacuum spacetime are reexpressed in terms of an appropriate conformal metric that is regular at (future) null infinity, they develop apparently singular terms in the associated conformal factor and thus appear to be ill-behaved at this (exterior) boundary. In this a... |
2311.15114 | Dibyendu Panigrahi Dp | D. Panigrahi, S. Chatterjee | Studies of the Inhomogeneous Cosmology in Higher Dimensional space-time
with a Cosmological Constant | 17 Pages, 15 figures, | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied the inhomogeneous cosmology in Kaluza-Klein spacetime with
positive cosmological constant. Depending on the integration constant we have
derived two types of solutions. The dimensional reduction is possible of extra
dimensional scale factor depending on the curvature of the metric for positive
cosmolo... | [
{
"created": "Sat, 25 Nov 2023 20:38:25 GMT",
"version": "v1"
}
] | 2023-11-28 | [
[
"Panigrahi",
"D.",
""
],
[
"Chatterjee",
"S.",
""
]
] | We have studied the inhomogeneous cosmology in Kaluza-Klein spacetime with positive cosmological constant. Depending on the integration constant we have derived two types of solutions. The dimensional reduction is possible of extra dimensional scale factor depending on the curvature of the metric for positive cosmologi... |
gr-qc/0008023 | David Garfinkle | David Garfinkle | An exact solution for 2+1 dimensional critical collapse | 5 pages, 5 figures, Revtex. New comparison of analytic and numerical
solutions beyond the past light cone of the singularity added. Two new
references added. Error in equation (21) corrected | Phys.Rev. D63 (2001) 044007 | 10.1103/PhysRevD.63.044007 | null | gr-qc | null | We find an exact solution in closed form for the critical collapse of a
scalar field with cosmological constant in 2+1 dimensions. This solution agrees
with the numerical simulation done by Pretorius and Choptuik of this system.
| [
{
"created": "Wed, 9 Aug 2000 21:55:51 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Nov 2000 15:13:33 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Garfinkle",
"David",
""
]
] | We find an exact solution in closed form for the critical collapse of a scalar field with cosmological constant in 2+1 dimensions. This solution agrees with the numerical simulation done by Pretorius and Choptuik of this system. |
1102.3886 | Emanuel Gallo | Emanuel Gallo and Osvaldo M. Moreschi | Gravitational lens optical scalars in terms of energy-momentum
distributions | 17 pages, 2 figures. Titled changed. Small improvements. References
added. Final version published in Phys.Rev.D | Phys.Rev.D83:083007,2011 | 10.1103/PhysRevD.83.083007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a general work on gravitational lensing. We present new expressions
for the optical scalars and the deflection angle in terms of the
energy-momentum tensor components of matter distributions. Our work generalizes
standard references in the literature where normally stringent assumptions are
made on the source... | [
{
"created": "Fri, 18 Feb 2011 18:46:59 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2011 18:48:01 GMT",
"version": "v2"
},
{
"created": "Mon, 9 May 2011 12:17:37 GMT",
"version": "v3"
}
] | 2011-05-12 | [
[
"Gallo",
"Emanuel",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | This is a general work on gravitational lensing. We present new expressions for the optical scalars and the deflection angle in terms of the energy-momentum tensor components of matter distributions. Our work generalizes standard references in the literature where normally stringent assumptions are made on the sources.... |
gr-qc/0108063 | L. C. Garcia de Andrade | L.C.Garcia de Andrade | Teleparallel orthonormal frames constraints on torsion detection? | Latex file | null | null | null | gr-qc | null | Spin-polarised cylindrically symmetric solution are shown not to be
compatible with teleparallel gravity.This can be done in two distinct
manners.The first is to show that not all components of the orthonormal tetrad
(OT).It is argue however that this result maybe done by a bad choice of the
spin distribution along t... | [
{
"created": "Fri, 24 Aug 2001 23:14:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Spin-polarised cylindrically symmetric solution are shown not to be compatible with teleparallel gravity.This can be done in two distinct manners.The first is to show that not all components of the orthonormal tetrad (OT).It is argue however that this result maybe done by a bad choice of the spin distribution along the... |
2203.07775 | Rahul Kumar | Sushant G. Ghosh and Rahul Kumar Walia | Shadows of Kerr-like black holes in $4D$ Einstein-Gauss-Bonnet gravity
and constraints from EHT observations | 15 pages and 6 figures. Matched with the published version in
proceedings of the Sixteenth Marcel Grossmann Meeting - MG16, July 5-10, 2021 | Proceedings of the MG16 Meeting on General Relativity, Remo
Ruffini, Gregory Vereshchagin (eds.) (World Scientific, 2023) | 10.1142/9789811269776_0084 | MG16 Proceedings | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The M87* black hole shadow observation by the Event Horizon Telescope (EHT)
has enabled us to test the modified gravity theories in the extreme-field
regime and estimating the black hole parameters. Having this assertion, we
investigate the Kerr-like rotating black holes in $4D$ Einstein-Gauss-Bonnet
(EGB) gravity an... | [
{
"created": "Tue, 15 Mar 2022 10:55:36 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2023 18:00:44 GMT",
"version": "v2"
}
] | 2023-02-06 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Walia",
"Rahul Kumar",
""
]
] | The M87* black hole shadow observation by the Event Horizon Telescope (EHT) has enabled us to test the modified gravity theories in the extreme-field regime and estimating the black hole parameters. Having this assertion, we investigate the Kerr-like rotating black holes in $4D$ Einstein-Gauss-Bonnet (EGB) gravity and ... |
1110.4055 | Alejandro Perez | Ernesto Frodden, Amit Ghosh, Alejandro Perez | A local first law for black hole thermodynamics | The derivation of the main result for the special case of isolated
horizons has been considerably strengthen | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first show that stationary black holes satisfy an extremely simple local
form of the first law \delta E=\kappa(l) \delta A/(8 \pi) where the
thermodynamical energy E=A/(8\pi l) and (local) surface gravity \kappa(l)=1/l,
where A is the horizon area and l is a proper length characterizing the
distance to the horizon... | [
{
"created": "Tue, 18 Oct 2011 17:19:05 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Dec 2011 16:28:14 GMT",
"version": "v2"
}
] | 2011-12-19 | [
[
"Frodden",
"Ernesto",
""
],
[
"Ghosh",
"Amit",
""
],
[
"Perez",
"Alejandro",
""
]
] | We first show that stationary black holes satisfy an extremely simple local form of the first law \delta E=\kappa(l) \delta A/(8 \pi) where the thermodynamical energy E=A/(8\pi l) and (local) surface gravity \kappa(l)=1/l, where A is the horizon area and l is a proper length characterizing the distance to the horizon o... |
gr-qc/0612136 | Dan Gorbonos | Amos Ori, Dan Gorbonos | A Simplified Mathematical Model for the Formation of Null Singularities
Inside Black Holes I - Basic Formulation and a Conjecture | 39 pages, 3 figures, extended version | J.Math.Phys.48:092502,2007 | 10.1063/1.2779950 | null | gr-qc | null | Einstein's equations are known to lead to the formation of black holes and
spacetime singularities. This appears to be a manifestation of the mathematical
phenomenon of finite-time blowup: a formation of singularities from regular
initial data. We present a simple hyperbolic system of two semi-linear
equations inspir... | [
{
"created": "Thu, 21 Dec 2006 15:49:57 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Apr 2007 21:33:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ori",
"Amos",
""
],
[
"Gorbonos",
"Dan",
""
]
] | Einstein's equations are known to lead to the formation of black holes and spacetime singularities. This appears to be a manifestation of the mathematical phenomenon of finite-time blowup: a formation of singularities from regular initial data. We present a simple hyperbolic system of two semi-linear equations inspired... |
1509.04914 | Clemens S\"amann | Clemens S\"amann, Roland Steinbauer, Alexander Lecke, Ji\v{r}\'i
Podolsk\'y | Geodesics in nonexpanding impulsive gravitational waves with $\Lambda$,
Part I | 32 pages, 3 figures, minor revisions, included "Part I" in the title,
final version | Class. Quantum Grav. 33 115002 (2016) | 10.1088/0264-9381/33/11/115002 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the geodesics in the entire class of nonexpanding impulsive
gravitational waves propagating in an (anti-)de Sitter universe using the
distributional form of the metric. Employing a 5-dimensional embedding
formalism and a general regularisation technique we prove existence and
uniqueness of geodesics cr... | [
{
"created": "Wed, 16 Sep 2015 13:35:24 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 2016 15:57:25 GMT",
"version": "v2"
}
] | 2016-05-03 | [
[
"Sämann",
"Clemens",
""
],
[
"Steinbauer",
"Roland",
""
],
[
"Lecke",
"Alexander",
""
],
[
"Podolský",
"Jiří",
""
]
] | We investigate the geodesics in the entire class of nonexpanding impulsive gravitational waves propagating in an (anti-)de Sitter universe using the distributional form of the metric. Employing a 5-dimensional embedding formalism and a general regularisation technique we prove existence and uniqueness of geodesics cros... |
2303.17985 | Mikko Laine | Niko Jokela, K. Kajantie, M. Laine, Sami Nurmi, Miika Sarkkinen | Inflationary gravitational wave background as a tail effect | 8 pages. v2: minor updates | Phys.Rev.D 108 (2023) L101503 | 10.1103/PhysRevD.108.L101503 | HIP-2023-8/TH | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The free propagator of a massless mode in an expanding universe can be
written as a sum of two terms, a lightcone and a tail part. The latter
describes a subluminal (time-like) signal. We show that the inflationary
gravitational wave background, influencing cosmic microwave background
polarization, and routinely used... | [
{
"created": "Fri, 31 Mar 2023 11:46:35 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Nov 2023 12:46:14 GMT",
"version": "v2"
}
] | 2023-11-29 | [
[
"Jokela",
"Niko",
""
],
[
"Kajantie",
"K.",
""
],
[
"Laine",
"M.",
""
],
[
"Nurmi",
"Sami",
""
],
[
"Sarkkinen",
"Miika",
""
]
] | The free propagator of a massless mode in an expanding universe can be written as a sum of two terms, a lightcone and a tail part. The latter describes a subluminal (time-like) signal. We show that the inflationary gravitational wave background, influencing cosmic microwave background polarization, and routinely used f... |
gr-qc/0105059 | Paul S. Wesson | Paul S. Wesson | On Higher-Dimensional Dynamics | null | J.Math.Phys.43:2423-2438,2002 | 10.1063/1.1462418 | null | gr-qc | null | Technical results are presented on motion in N(>4)D manifolds to clarify the
physics of Kaluza-Klein theory, brane theory and string theory. The so-called
canonical or warp metric in 5D effectively converts the manifold from a
coordinate space to a momentum space, resulting in a new force (per unit mass)
parallel to ... | [
{
"created": "Thu, 17 May 2001 15:50:56 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Wesson",
"Paul S.",
""
]
] | Technical results are presented on motion in N(>4)D manifolds to clarify the physics of Kaluza-Klein theory, brane theory and string theory. The so-called canonical or warp metric in 5D effectively converts the manifold from a coordinate space to a momentum space, resulting in a new force (per unit mass) parallel to th... |
gr-qc/9404043 | Greg Cook | Gregory B. Cook | Three-dimensional initial data for the collision of two black holes II:
Quasi-circular orbits for equal-mass black holes | 9 pages (RevTex 3.0 with 5 uuencoded figures), CRSR-1068 | Phys.Rev.D50:5025-5032,1994 | 10.1103/PhysRevD.50.5025 | null | gr-qc astro-ph | null | The construction of initial-data sets representing binary black-hole
configurations in quasi-circular orbits is studied in the context of the
conformal-imaging formalism. An effective-potential approach for locating
quasi-circular orbits is outlined for the general case of two holes of
arbitrary size and with arbitra... | [
{
"created": "Mon, 25 Apr 1994 16:16:33 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Cook",
"Gregory B.",
""
]
] | The construction of initial-data sets representing binary black-hole configurations in quasi-circular orbits is studied in the context of the conformal-imaging formalism. An effective-potential approach for locating quasi-circular orbits is outlined for the general case of two holes of arbitrary size and with arbitrary... |
gr-qc/9912010 | Leor Barack | Leor Barack and Amos Ori | Mode sum regularization approach for the self-force in black hole
spacetime | Minor corrections. Accepted for publication in PRD (Rapid
Communications) | Phys.Rev.D61:061502,2000 | 10.1103/PhysRevD.61.061502 | null | gr-qc | null | We present a method for calculating the self-force (the ``radiation reaction
force'') acting on a charged particle moving in a strong field orbit in black
hole spacetime. In this approach, one first calculates the contribution to the
self-force due to each multipole mode of the particle's field. Then, the sum
over mo... | [
{
"created": "Thu, 2 Dec 1999 15:19:54 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jan 2000 17:42:17 GMT",
"version": "v2"
}
] | 2009-12-30 | [
[
"Barack",
"Leor",
""
],
[
"Ori",
"Amos",
""
]
] | We present a method for calculating the self-force (the ``radiation reaction force'') acting on a charged particle moving in a strong field orbit in black hole spacetime. In this approach, one first calculates the contribution to the self-force due to each multipole mode of the particle's field. Then, the sum over mode... |
1010.5137 | Mihalis Dafermos | Mihalis Dafermos and Igor Rodnianski | The black hole stability problem for linear scalar perturbations | 48 pages, 5 figures, to appear in Proceedings of the 12 Marcel
Grossmann Meeting | null | 10.1142/9789814304634_0032 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review our recent work on linear stability for scalar perturbations of
Kerr spacetimes, that is to say, boundedness and decay properties for solutions
of the scalar wave equation \Box_g{\psi} = 0 on Kerr exterior backgrounds. We
begin with the very slowly rotating case |a| \ll M, where first boundedness and
then d... | [
{
"created": "Mon, 25 Oct 2010 14:16:11 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Dafermos",
"Mihalis",
""
],
[
"Rodnianski",
"Igor",
""
]
] | We review our recent work on linear stability for scalar perturbations of Kerr spacetimes, that is to say, boundedness and decay properties for solutions of the scalar wave equation \Box_g{\psi} = 0 on Kerr exterior backgrounds. We begin with the very slowly rotating case |a| \ll M, where first boundedness and then dec... |
2307.10307 | Peter Taylor | Julio Arrechea, Cormac Breen, Adrian Ottewill and Peter Taylor | Renormalized stress-energy tensor for scalar fields in Hartle-Hawking,
Boulware and Unruh states in the Reissner-Nordstr\"om spacetime | 18 pages, 4 figures | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a quantum scalar field propagating on the
Reissner-Nordstr\"om black hole spacetime. We compute the renormalized
stress-energy tensor for the field in the Hartle-Hawking, Boulware and Unruh
states. When the field is in the Hartle-Hawking state, we renormalize using the
recently developed ``... | [
{
"created": "Tue, 18 Jul 2023 22:04:21 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"Arrechea",
"Julio",
""
],
[
"Breen",
"Cormac",
""
],
[
"Ottewill",
"Adrian",
""
],
[
"Taylor",
"Peter",
""
]
] | In this paper, we consider a quantum scalar field propagating on the Reissner-Nordstr\"om black hole spacetime. We compute the renormalized stress-energy tensor for the field in the Hartle-Hawking, Boulware and Unruh states. When the field is in the Hartle-Hawking state, we renormalize using the recently developed ``ex... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.