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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1407.0989 | Hal Haggard | Hal M. Haggard and Carlo Rovelli | Black hole fireworks: quantum-gravity effects outside the horizon spark
black to white hole tunneling | 10 pages, 5 figures | Phys. Rev. D 92, 104020 (2015) | 10.1103/PhysRevD.92.104020 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that there is a classical metric satisfying the Einstein equations
outside a finite spacetime region where matter collapses into a black hole and
then emerges from a white hole. We compute this metric explicitly. We show how
quantum theory determines the (long) time for the process to happen. A black
hole can... | [
{
"created": "Thu, 3 Jul 2014 17:27:45 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Jul 2014 17:46:51 GMT",
"version": "v2"
}
] | 2015-11-11 | [
[
"Haggard",
"Hal M.",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We show that there is a classical metric satisfying the Einstein equations outside a finite spacetime region where matter collapses into a black hole and then emerges from a white hole. We compute this metric explicitly. We show how quantum theory determines the (long) time for the process to happen. A black hole can t... |
gr-qc/9911066 | James Lidsey | James E. Lidsey | Separable Brane Cosmologies in Heterotic M-Theory | 8 pages, plain Latex | Class.Quant.Grav.17:L39-L45,2000 | 10.1088/0264-9381/17/2/103 | null | gr-qc hep-th | null | It is shown that any anisotropic and inhomogeneous cosmological solution to
the lowest-order, four-dimensional, dilaton-graviton string equations of motion
may be employed as a seed to derive a curved, three-brane cosmological solution
to five-dimensional heterotic M-theory compactified on a Calabi-Yau three-fold.
Th... | [
{
"created": "Thu, 18 Nov 1999 11:39:08 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Lidsey",
"James E.",
""
]
] | It is shown that any anisotropic and inhomogeneous cosmological solution to the lowest-order, four-dimensional, dilaton-graviton string equations of motion may be employed as a seed to derive a curved, three-brane cosmological solution to five-dimensional heterotic M-theory compactified on a Calabi-Yau three-fold. This... |
1808.06546 | Esteban Gonz\'alez | Felipe Contreras, Norman Cruz, Emilio Elizalde, Esteban Gonz\'alez and
Sergei Odintsov | Linking little rip cosmologies with regular early universes | 18 pages, 17 figures, analysis extended | Phys. Rev. D 98, 123520 (2018) | 10.1103/PhysRevD.98.123520 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological fluids with a Generalized Equation of State (GEoS) are here
considered, whose corresponding EoS parameter $\omega$ describes a fluid with
phantom behavior, namely $\omega<-1$, but leading to universes free of
singularities at any past or future, finite time. Thus avoiding, in particular,
the Big Bang and... | [
{
"created": "Mon, 20 Aug 2018 16:20:05 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Dec 2018 20:55:55 GMT",
"version": "v2"
}
] | 2018-12-26 | [
[
"Contreras",
"Felipe",
""
],
[
"Cruz",
"Norman",
""
],
[
"Elizalde",
"Emilio",
""
],
[
"González",
"Esteban",
""
],
[
"Odintsov",
"Sergei",
""
]
] | Cosmological fluids with a Generalized Equation of State (GEoS) are here considered, whose corresponding EoS parameter $\omega$ describes a fluid with phantom behavior, namely $\omega<-1$, but leading to universes free of singularities at any past or future, finite time. Thus avoiding, in particular, the Big Bang and t... |
gr-qc/0310001 | Richard Price | Zeferino Andrade, Christopher Beetle, Alexey Blinov, Benjamin Bromley,
Lior M. Burko, Maria Cranor, Robert Owen, and Richard H. Price | The Periodic Standing-Wave Approximation: Overview and Three Dimensional
Scalar Models | 13 pages RevTeX, 5 figures. New version. A revised form of the
nonlinearity produces better results | Phys.Rev. D70 (2004) 064001 | 10.1103/PhysRevD.70.064001 | null | gr-qc | null | The periodic standing-wave method for binary inspiral computes the exact
numerical solution for periodic binary motion with standing gravitational
waves, and uses it as an approximation to slow binary inspiral with outgoing
waves. Important features of this method presented here are: (i) the
mathematical nature of th... | [
{
"created": "Tue, 30 Sep 2003 20:02:12 GMT",
"version": "v1"
},
{
"created": "Sat, 8 May 2004 05:30:26 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Andrade",
"Zeferino",
""
],
[
"Beetle",
"Christopher",
""
],
[
"Blinov",
"Alexey",
""
],
[
"Bromley",
"Benjamin",
""
],
[
"Burko",
"Lior M.",
""
],
[
"Cranor",
"Maria",
""
],
[
"Owen",
"Robert",
""
],
... | The periodic standing-wave method for binary inspiral computes the exact numerical solution for periodic binary motion with standing gravitational waves, and uses it as an approximation to slow binary inspiral with outgoing waves. Important features of this method presented here are: (i) the mathematical nature of the ... |
1708.00156 | Naveen K. Singh Dr. | Abhineet Agarwal, R. Myrzakulov, M. Sami, Naveen K. Singh | Quintessential Inflation in a thawing realization | 11 pages | Phys.Lett. B770 (2017) 200-208 | 10.1016/j.physletb.2017.04.066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quintessential inflation with an inverse hyperbolic type potential
$V(\phi) = {V_0}/{\cosh \left( {\phi^n}/{\lambda^n} \right)}$, where $V_0$,
$\lambda$ and "n" are parameters of the theory. We obtain a bound on $\lambda$
for different values of the parameter n. The spectral index and the
tensor-to-scalar-ra... | [
{
"created": "Tue, 1 Aug 2017 04:44:38 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Aug 2017 17:03:25 GMT",
"version": "v2"
}
] | 2017-08-04 | [
[
"Agarwal",
"Abhineet",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Sami",
"M.",
""
],
[
"Singh",
"Naveen K.",
""
]
] | We study quintessential inflation with an inverse hyperbolic type potential $V(\phi) = {V_0}/{\cosh \left( {\phi^n}/{\lambda^n} \right)}$, where $V_0$, $\lambda$ and "n" are parameters of the theory. We obtain a bound on $\lambda$ for different values of the parameter n. The spectral index and the tensor-to-scalar-rati... |
2008.07327 | Muhammad Sharif | M. Sharif, Iqra Nawazish and Shahid Hussain | Static Wormhole Solutions and Noether Symmetry in Modified Gauss-Bonnet
Gravity | 28 pages, 14 figures, to appear in EPJC | Eur. Phys. J. C 80(2020)783 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze static traversable wormholes via Noether symmetry
technique in modified Gauss-Bonnet $f(\mathcal{G})$ theory of gravity (where
$\mathcal{G}$ represents Gauss-Bonnet term). We assume isotropic matter
configuration and spherically symmetric metric. We construct three
$f(\mathcal{G})$ models, i... | [
{
"created": "Fri, 14 Aug 2020 14:32:24 GMT",
"version": "v1"
}
] | 2020-09-03 | [
[
"Sharif",
"M.",
""
],
[
"Nawazish",
"Iqra",
""
],
[
"Hussain",
"Shahid",
""
]
] | In this paper, we analyze static traversable wormholes via Noether symmetry technique in modified Gauss-Bonnet $f(\mathcal{G})$ theory of gravity (where $\mathcal{G}$ represents Gauss-Bonnet term). We assume isotropic matter configuration and spherically symmetric metric. We construct three $f(\mathcal{G})$ models, i.e... |
gr-qc/9910048 | Maria Cristina Neacsu | Maria Cristina Neacsu | Dilation Dark Matter in Vaidya-De-Sitter Spacetime | submitt. IJMPD, USA | Int.J.Mod.Phys. D8 (1999) 719-724 | null | null | gr-qc | null | The exterior of a relativistic star can be modelated with the Vaidya
radiating metric. It is started from the generalized Vaidya metric that allows
a type II fluid and studied the conditions of generating new analytical
solutions of the Einstein's field equations. It is shown that the mass
parameter solution gives th... | [
{
"created": "Wed, 13 Oct 1999 14:38:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Neacsu",
"Maria Cristina",
""
]
] | The exterior of a relativistic star can be modelated with the Vaidya radiating metric. It is started from the generalized Vaidya metric that allows a type II fluid and studied the conditions of generating new analytical solutions of the Einstein's field equations. It is shown that the mass parameter solution gives the ... |
1711.05183 | Alejandro Perez | Alejandro Perez and Daniel Sudarsky | Dark energy from quantum gravity discreteness | Typos corrected, closer to published version | Phys. Rev. Lett. 122, 221302 (2019) | 10.1103/PhysRevLett.122.221302 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that discreteness at the Planck scale (naturally expected to arise
from quantum gravity) might manifest in the form of minute violations of
energy-momentum conservation of the matter degrees of freedom when described in
terms of (idealized) smooth fields on a smooth spacetime. In the context of
applications ... | [
{
"created": "Tue, 14 Nov 2017 16:44:21 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2017 16:44:39 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Apr 2018 08:13:28 GMT",
"version": "v3"
},
{
"created": "Mon, 10 Jun 2019 14:27:44 GMT",
"version": "v4"
}
] | 2019-06-12 | [
[
"Perez",
"Alejandro",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We argue that discreteness at the Planck scale (naturally expected to arise from quantum gravity) might manifest in the form of minute violations of energy-momentum conservation of the matter degrees of freedom when described in terms of (idealized) smooth fields on a smooth spacetime. In the context of applications to... |
2006.12272 | Mart\'in G. Richarte MR | Martin G. Richarte and Claudio Simeone | Wormholes in Einstein-Born-Infeld theory | 10 pages, 6 figures. An old article. arXiv admin note: text overlap
with arXiv:1003.0741, arXiv:1001.4034, arXiv:0711.2297 | Phys. Rev. D 81, 109903 (2009) | 10.1103/PhysRevD.81.109903, 10.1103/PhysRevD.80.104033 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | Spherically symmetric thin-shell wormholes are studied within the framework
of Einstein-Born-Infeld theory. We analyze the exotic matter content and find
that for certain values of the Born-Infeld parameter the amount of exotic
matter on the shell can be reduced in relation to the Maxwell case. We also
examine the me... | [
{
"created": "Thu, 18 Jun 2020 23:37:12 GMT",
"version": "v1"
}
] | 2020-06-23 | [
[
"Richarte",
"Martin G.",
""
],
[
"Simeone",
"Claudio",
""
]
] | Spherically symmetric thin-shell wormholes are studied within the framework of Einstein-Born-Infeld theory. We analyze the exotic matter content and find that for certain values of the Born-Infeld parameter the amount of exotic matter on the shell can be reduced in relation to the Maxwell case. We also examine the mech... |
1202.4317 | Kazuharu Bamba | Kazuharu Bamba | Equation of State for Dark Energy in Modified Gravity Theories | 7 pages, no figure, contribution to KMI Inauguration Conference
"Quest for the Origin of Particles and the Universe" (KMIIN), 24-26 Nov.
2011, KMI, Nagoya University | null | 10.1142/9789814412322_0008 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the equation of state (EoS) for dark energy $w_{\mathrm{DE}}$ in
modified gravitational theories to explain the current accelerated expansion of
the universe. We explicitly demonstrate that the future crossings of the
phantom divide line of $w_{\mathrm{DE}}=-1$ are the generic feature in the
existing viabl... | [
{
"created": "Mon, 20 Feb 2012 13:23:45 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Bamba",
"Kazuharu",
""
]
] | We explore the equation of state (EoS) for dark energy $w_{\mathrm{DE}}$ in modified gravitational theories to explain the current accelerated expansion of the universe. We explicitly demonstrate that the future crossings of the phantom divide line of $w_{\mathrm{DE}}=-1$ are the generic feature in the existing viable ... |
1810.12767 | Shao-Wen Wei | Hui-Min Wang, Yu-Meng Xu, Shao-Wen Wei | Shadows of Kerr-like black holes in a modified gravity theory | 14 pages, 8 figures | JCAP 1903, 046 (2019) | 10.1088/1475-7516/2019/03/046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the shadows cast by non-rotating and rotating modified gravity
black holes are investigated. In addition to the black hole spin parameter $a$
and the inclination angle $\theta$ of observer, another parameter $\alpha$
measuring the deviation of gravitational constant from the Newton one is also
found to... | [
{
"created": "Tue, 30 Oct 2018 14:21:02 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Apr 2019 15:55:12 GMT",
"version": "v2"
}
] | 2019-04-08 | [
[
"Wang",
"Hui-Min",
""
],
[
"Xu",
"Yu-Meng",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | In this paper, the shadows cast by non-rotating and rotating modified gravity black holes are investigated. In addition to the black hole spin parameter $a$ and the inclination angle $\theta$ of observer, another parameter $\alpha$ measuring the deviation of gravitational constant from the Newton one is also found to a... |
0811.2029 | Vladimir S. Manko | V.S. Manko, E. Ruiz and J. Sanchez-Mondragon | Analogs of the double-Reissner-Nordstrom solution in magnetostatics and
dilaton gravity: mathematical description and some physical properties | 18 pages, 1 figure; title changed, typos corrected; a considerably
extended version which includes the discussion of the magnetostatic case and
the explicit formula for the magnetic potential | Phys.Rev.D79:084024,2009 | 10.1103/PhysRevD.79.084024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a magnetic analog of the double-Reissner-Nordstrom
solution and construct the corresponding magnetic potential A_\varphi in the
explicit form. The behavior of the resulting solution under the Harrison
transformation then naturally singles out the asymmetric black diholes -
configurations com... | [
{
"created": "Thu, 13 Nov 2008 04:47:49 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Nov 2008 23:42:57 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Mar 2009 23:45:42 GMT",
"version": "v3"
}
] | 2009-11-06 | [
[
"Manko",
"V. S.",
""
],
[
"Ruiz",
"E.",
""
],
[
"Sanchez-Mondragon",
"J.",
""
]
] | In this paper we consider a magnetic analog of the double-Reissner-Nordstrom solution and construct the corresponding magnetic potential A_\varphi in the explicit form. The behavior of the resulting solution under the Harrison transformation then naturally singles out the asymmetric black diholes - configurations compo... |
1012.1991 | Maarten van de Meent | Maarten van de Meent | Piecewise Flat Gravitational Waves | Accepted for publication in Classical and Quantum gravity | Class.Quant.Grav.28:075005,2011 | 10.1088/0264-9381/28/7/075005 | ITP-UU-10/46 SPIN-10/39 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the continuum limit of the piecewise flat locally finite gravity
model introduced by 't Hooft. In the linear weak field limit we find the
energy--momentum tensor and metric perturbation of an arbitrary configuration
of defects. The energy--momentum turns out to be restricted to satisfy certain
conditions. ... | [
{
"created": "Thu, 9 Dec 2010 12:54:52 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Feb 2011 09:08:32 GMT",
"version": "v2"
}
] | 2011-03-18 | [
[
"van de Meent",
"Maarten",
""
]
] | We examine the continuum limit of the piecewise flat locally finite gravity model introduced by 't Hooft. In the linear weak field limit we find the energy--momentum tensor and metric perturbation of an arbitrary configuration of defects. The energy--momentum turns out to be restricted to satisfy certain conditions. Th... |
2210.09307 | Pardyumn Kumar Sahoo | N. S. Kavya, V. Venkatesha, Sanjay Mandal, P.K. Sahoo | Constraining Anisotropic Cosmological Model in
$f(\mathcal{R},\mathscr{L}_m)$ Gravity | Physics of the Dark Universe accepted version | Physics of the Dark Universe 38 (2022) 101126 | 10.1016/j.dark.2022.101126 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The observational evidence regarding the present cosmological aspects tells
us about the presence of very little anisotropy in the universe on a large
scale. Here, in this paper, we attempt to study locally rotationally symmetric
(LRS) homogeneous Bianchi-I spacetime with the isotropic matter distribution.
This is do... | [
{
"created": "Mon, 17 Oct 2022 04:52:23 GMT",
"version": "v1"
}
] | 2022-11-02 | [
[
"Kavya",
"N. S.",
""
],
[
"Venkatesha",
"V.",
""
],
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
]
] | The observational evidence regarding the present cosmological aspects tells us about the presence of very little anisotropy in the universe on a large scale. Here, in this paper, we attempt to study locally rotationally symmetric (LRS) homogeneous Bianchi-I spacetime with the isotropic matter distribution. This is done... |
gr-qc/9706004 | Andrew Chamblin | A. Chamblin (Santa Barbara, ITP & Cambridge U., DAMTP), J.M.A.
Ashbourn-Chamblin (Oxford U., Wolfson College), R. Emparan (UC, Santa
Barbara), A. Sornborger (Cambridge U., DAMTP) | Can extreme black holes have (long) Abelian Higgs hair? | 21 pages REVTeX plus 9 figures. Additional figures and mpeg movies
available at http://www.damtp.cam.ac.uk/user/ats25/strhole.html We have made
several cosmetic changes, and we have revised and extended the discussion of
strings which end on extreme horizons | Phys.Rev. D58 (1998) 124014 | 10.1103/PhysRevD.58.124014 | DAMTP R-97/18, UCSBTH-97-10 | gr-qc hep-th | null | It has been argued that a black hole horizon can support the long range
fields of a Nielsen-Olesen string, and that one can think of such a vortex as
black hole ``hair''. In this paper, we examine the properties of an Abelian
Higgs vortex in the presence of a charged black hole as we allow the hole to
approach extrem... | [
{
"created": "Mon, 2 Jun 1997 19:21:05 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 1998 21:38:41 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Chamblin",
"A.",
"",
"Santa Barbara, ITP & Cambridge U., DAMTP"
],
[
"Ashbourn-Chamblin",
"J. M. A.",
"",
"Oxford U., Wolfson College"
],
[
"Emparan",
"R.",
"",
"UC, Santa\n Barbara"
],
[
"Sornborger",
"A.",
"",
"Cambridge U., DAMTP"
... | It has been argued that a black hole horizon can support the long range fields of a Nielsen-Olesen string, and that one can think of such a vortex as black hole ``hair''. In this paper, we examine the properties of an Abelian Higgs vortex in the presence of a charged black hole as we allow the hole to approach extremal... |
2404.04978 | Zhu Yi | Jie Liu, Yungui Gong, Zhu Yi | Constant-roll inflation with non-minimally derivative coupling | 8 pages, accepted by Communications in Theoretical Physics | Commun. Theor. Phys. 76 (2024) 095401 | 10.1088/1572-9494/ad51ef | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the constant-roll inflation with non-minimally kinetic
coupling to the Einstein tensor. With the slow-roll parameter $\eta_\phi =
-\ddot{\phi}/(H\dot{\phi})$ being a constant, we calculate the power spectra
for scalar and tensor perturbations, and derive the expressions for the scalar
spectral tilt $n_... | [
{
"created": "Sun, 7 Apr 2024 14:39:37 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2024 08:48:04 GMT",
"version": "v2"
}
] | 2024-07-22 | [
[
"Liu",
"Jie",
""
],
[
"Gong",
"Yungui",
""
],
[
"Yi",
"Zhu",
""
]
] | We investigate the constant-roll inflation with non-minimally kinetic coupling to the Einstein tensor. With the slow-roll parameter $\eta_\phi = -\ddot{\phi}/(H\dot{\phi})$ being a constant, we calculate the power spectra for scalar and tensor perturbations, and derive the expressions for the scalar spectral tilt $n_s$... |
2103.10802 | Hayato Motohashi | Hayato Motohashi, Sousuke Noda | Exact solution for wave scattering from black holes: Formulation | 22 pages, 6 figures; matches published version | Prog. Theor. Exp. Phys. 2021, 083E03 (2021) | 10.1093/ptep/ptab097 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We establish an exact formulation for wave scattering of a massless field
with spin and charge by a Kerr-Newman-de Sitter black hole. Our formulation is
based on the exact solution of the Teukolsky equation in terms of the local
Heun function, and does not require any approximation. It serves as simple
exact formulae... | [
{
"created": "Fri, 19 Mar 2021 13:40:48 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Aug 2021 00:25:51 GMT",
"version": "v2"
}
] | 2021-08-31 | [
[
"Motohashi",
"Hayato",
""
],
[
"Noda",
"Sousuke",
""
]
] | We establish an exact formulation for wave scattering of a massless field with spin and charge by a Kerr-Newman-de Sitter black hole. Our formulation is based on the exact solution of the Teukolsky equation in terms of the local Heun function, and does not require any approximation. It serves as simple exact formulae w... |
2210.03010 | Sen Guo | Sen Guo, Guan-Ru Li, En-Wei Liang | Optical appearance of a thin-shell wormhole with a Hayward profile | 12 pages, 8 figures | published EPJC (2023) | 10.1140/epjc/s10052-023-11842-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The optical properties of a thin-shell wormhole (TSW) with a Hayward profile
is investigated. Adopting the ray-tracing method, we demonstrate that the TSW's
contralateral spacetime is capable of reflecting a significant portion of light
back to the observer spacetime. We analyze the effective potential, light
deflect... | [
{
"created": "Thu, 6 Oct 2022 15:58:16 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jan 2023 15:52:20 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Apr 2023 08:35:06 GMT",
"version": "v3"
},
{
"created": "Tue, 9 May 2023 05:08:57 GMT",
"version": "v4"
},
{
"creat... | 2023-08-09 | [
[
"Guo",
"Sen",
""
],
[
"Li",
"Guan-Ru",
""
],
[
"Liang",
"En-Wei",
""
]
] | The optical properties of a thin-shell wormhole (TSW) with a Hayward profile is investigated. Adopting the ray-tracing method, we demonstrate that the TSW's contralateral spacetime is capable of reflecting a significant portion of light back to the observer spacetime. We analyze the effective potential, light deflectio... |
2401.05181 | Naveena Kumara A | A. Naveena Kumara, Shreyas Punacha and Md Sabir Ali | Lyapunov Exponents and Phase Structure of Lifshitz and Hyperscaling
Violating Black Holes | 35 pages, 10 figures. Revised version | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the phase structure of hyperscaling violating black holes using
Lyapunov exponents. For describing hyperscaling violating system, we chose a
particular gravity model constructed from generalized Einstein-Maxwell-Dilaton
action which includes the Lifshitz cases in appropriate limit. We study the
relationship ... | [
{
"created": "Wed, 10 Jan 2024 14:32:17 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Mar 2024 17:37:46 GMT",
"version": "v2"
}
] | 2024-03-05 | [
[
"Kumara",
"A. Naveena",
""
],
[
"Punacha",
"Shreyas",
""
],
[
"Ali",
"Md Sabir",
""
]
] | We study the phase structure of hyperscaling violating black holes using Lyapunov exponents. For describing hyperscaling violating system, we chose a particular gravity model constructed from generalized Einstein-Maxwell-Dilaton action which includes the Lifshitz cases in appropriate limit. We study the relationship be... |
1403.1725 | Adam Chudecki Dr | Adam Chudecki, Michal Dobrski | Proper conformal symmetries in SD Einstein spaces | null | Journal of Mathematical Physics, 55, 082502 (2014) | 10.1063/1.4893000 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Proper conformal symmetries in self-dual (SD) Einstein spaces are considered.
It is shown, that such symmetries are admitted only by the Einstein spaces of
the type [N]x[N]. Spaces of the type [N]x[-] are considered in details.
Existence of the proper conformal Killing vector implies existence of the
isometric, covar... | [
{
"created": "Fri, 7 Mar 2014 11:36:57 GMT",
"version": "v1"
}
] | 2014-10-29 | [
[
"Chudecki",
"Adam",
""
],
[
"Dobrski",
"Michal",
""
]
] | Proper conformal symmetries in self-dual (SD) Einstein spaces are considered. It is shown, that such symmetries are admitted only by the Einstein spaces of the type [N]x[N]. Spaces of the type [N]x[-] are considered in details. Existence of the proper conformal Killing vector implies existence of the isometric, covaria... |
1203.2641 | Olaf Dreyer | Olaf Dreyer | Internal Relativity | 9 pages, RevTex4 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity differs from other forces in nature in that it can be made
to disappear locally. This is the essence of the equivalence principle. In
general relativity the equivalence principle is implemented using differential
geometry. The connection that comes from a metric is used to glue together the
differe... | [
{
"created": "Mon, 12 Mar 2012 20:41:26 GMT",
"version": "v1"
}
] | 2012-03-14 | [
[
"Dreyer",
"Olaf",
""
]
] | General relativity differs from other forces in nature in that it can be made to disappear locally. This is the essence of the equivalence principle. In general relativity the equivalence principle is implemented using differential geometry. The connection that comes from a metric is used to glue together the different... |
1611.01508 | Ilya Vilensky | Ilya Vilensky | Spinfoam cosmology with the proper vertex amplitude | improved presentation, added references, included discussion of
long-range correlations | Class. Quantum Grav. 34 225015 (2017) | 10.1088/1361-6382/aa91f4 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The proper vertex amplitude is derived from the EPRL vertex by restricting to
a single gravitational sector in order to achieve the correct semi-classical
behaviour. We apply the proper vertex to calculate a cosmological transition
amplitude that can be viewed as the Hartle-Hawking wavefunction. To perform
this calcu... | [
{
"created": "Fri, 4 Nov 2016 19:55:51 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2017 20:26:29 GMT",
"version": "v2"
}
] | 2018-05-29 | [
[
"Vilensky",
"Ilya",
""
]
] | The proper vertex amplitude is derived from the EPRL vertex by restricting to a single gravitational sector in order to achieve the correct semi-classical behaviour. We apply the proper vertex to calculate a cosmological transition amplitude that can be viewed as the Hartle-Hawking wavefunction. To perform this calcula... |
0805.4302 | Amit Ghosh | A. Ghosh and P. Mitra | A comment on black hole state counting in loop quantum gravity | 1 page | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are two ways of counting microscopic states of black holes in loop
quantum gravity, one counting all allowed spin network labels $j,m$ and the
other involving only the labels $m$. Counting states with $|m|=j$, as done in a
recent Letter, does not follow either.
| [
{
"created": "Wed, 28 May 2008 10:22:10 GMT",
"version": "v1"
}
] | 2008-05-29 | [
[
"Ghosh",
"A.",
""
],
[
"Mitra",
"P.",
""
]
] | There are two ways of counting microscopic states of black holes in loop quantum gravity, one counting all allowed spin network labels $j,m$ and the other involving only the labels $m$. Counting states with $|m|=j$, as done in a recent Letter, does not follow either. |
2007.13799 | Shammi Tahura | Shammi Tahura, David A. Nichols, Alexander Saffer, Leo C. Stein, Kent
Yagi | Brans-Dicke theory in Bondi-Sachs form: Asymptotically flat solutions,
asymptotic symmetries and gravitational-wave memory effects | Appendix added, section 2B modified, minor modifications to the
introduction, matches published version | Phys. Rev. D 103, 104026 (2021) | 10.1103/PhysRevD.103.104026 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave memory effects are identified by their distinctive effects
on families of freely falling observers: after a burst of waves pass by their
locations, memory effects can cause lasting relative displacements of the
observers. These effects are closely related to the infrared properties of
gravity and o... | [
{
"created": "Mon, 27 Jul 2020 18:28:49 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2021 18:32:13 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Tahura",
"Shammi",
""
],
[
"Nichols",
"David A.",
""
],
[
"Saffer",
"Alexander",
""
],
[
"Stein",
"Leo C.",
""
],
[
"Yagi",
"Kent",
""
]
] | Gravitational-wave memory effects are identified by their distinctive effects on families of freely falling observers: after a burst of waves pass by their locations, memory effects can cause lasting relative displacements of the observers. These effects are closely related to the infrared properties of gravity and oth... |
1704.05506 | Orr Sela | Assaf Lanir, Amos Ori and Orr Sela | Curing the Self-Force Runaway Problem in Finite-Difference Integration | 12 pages, 7 figures; A significant extension of this manuscript was
published in PRD by A. Lanir and O. Sela | Phys. Rev. D 99, 064031 (2019) | 10.1103/PhysRevD.99.064031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The electromagnetic self-force equation of motion is known to be afflicted by
the so-called runaway problem. A similar problem arises in the semiclassical
Einstein's field equation and plagues the self-consistent semiclassical
evolution of spacetime. Motivated to overcome the latter challenge, we first
address the fo... | [
{
"created": "Tue, 18 Apr 2017 20:03:49 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2019 13:18:35 GMT",
"version": "v2"
}
] | 2019-04-03 | [
[
"Lanir",
"Assaf",
""
],
[
"Ori",
"Amos",
""
],
[
"Sela",
"Orr",
""
]
] | The electromagnetic self-force equation of motion is known to be afflicted by the so-called runaway problem. A similar problem arises in the semiclassical Einstein's field equation and plagues the self-consistent semiclassical evolution of spacetime. Motivated to overcome the latter challenge, we first address the form... |
1909.00284 | Erik Lentz | Erik W. Lentz | Exotic Behaviors of Space-time in Einstein-Maxwell Theory | 6 pages, 6 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper examines the structure of electric fields and space-times created
by extended finite distributions of irrotational static and
spherically-symmetric charge. The resulting electric fields are found to source
features in space-time commonly associated with the presence of fields with
locally positive and nega... | [
{
"created": "Sat, 31 Aug 2019 20:46:35 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Lentz",
"Erik W.",
""
]
] | This paper examines the structure of electric fields and space-times created by extended finite distributions of irrotational static and spherically-symmetric charge. The resulting electric fields are found to source features in space-time commonly associated with the presence of fields with locally positive and negati... |
2207.12745 | Puxun Wu | Rongrong Zhai, Hongwei Yu and Puxun Wu | Growth of power spectrum due to decrease of sound speed during inflation | 11 pages, 1 figure. three references added | Physical Review D 106, 023517 (2022) | 10.1103/PhysRevD.106.023517 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the amplification of the curvature perturbations due to a small
sound speed and find that its origin is different completely from that due to
the ultraslow-roll inflation. This is because when the sound speed is very
small the enhancement of the power spectrum comes from the fact that the
curvature perturbat... | [
{
"created": "Tue, 26 Jul 2022 08:51:54 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 2022 12:13:38 GMT",
"version": "v2"
}
] | 2022-09-20 | [
[
"Zhai",
"Rongrong",
""
],
[
"Yu",
"Hongwei",
""
],
[
"Wu",
"Puxun",
""
]
] | We study the amplification of the curvature perturbations due to a small sound speed and find that its origin is different completely from that due to the ultraslow-roll inflation. This is because when the sound speed is very small the enhancement of the power spectrum comes from the fact that the curvature perturbatio... |
gr-qc/0107094 | Felix Finster | Felix Finster, Niky Kamran, Joel Smoller, and Shing-Tung Yau | Decay Rates and Probability Estimates for Massive Dirac Particles in the
Kerr-Newman Black Hole Geometry | 42 pages, 3 figures (published version) | Commun.Math.Phys. 230 (2002) 201-244 | 10.1007/s002200200648 | null | gr-qc math-ph math.AP math.MP | null | The Cauchy problem is considered for the massive Dirac equation in the
non-extreme Kerr-Newman geometry, for smooth initial data with compact support
outside the event horizon and bounded angular momentum. We prove that the Dirac
wave function decays in L^\infty_loc at least at the rate t^{-5/6}. For generic
initial ... | [
{
"created": "Sat, 28 Jul 2001 19:34:37 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2002 10:10:02 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Finster",
"Felix",
""
],
[
"Kamran",
"Niky",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | The Cauchy problem is considered for the massive Dirac equation in the non-extreme Kerr-Newman geometry, for smooth initial data with compact support outside the event horizon and bounded angular momentum. We prove that the Dirac wave function decays in L^\infty_loc at least at the rate t^{-5/6}. For generic initial da... |
1607.07963 | Seramika Ariwahjoedi | Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli, Freddy P. Zen | Degrees of freedom in discrete geometry | 20 pages, 21 figures. The information contained in this article was
extracted from a doctoral thesis by the author | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following recent developments in discrete gravity, we study geometrical
variables (angles and forms) of simplices in the discrete geometry point of
view. Some of our relatively new results include: new ways of writing a set of
simplices using vectorial (differential form) and coordinate-free pictures, and
a consisten... | [
{
"created": "Wed, 27 Jul 2016 05:16:37 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Sep 2016 08:55:38 GMT",
"version": "v2"
}
] | 2016-09-20 | [
[
"Ariwahjoedi",
"Seramika",
""
],
[
"Kosasih",
"Jusak Sali",
""
],
[
"Rovelli",
"Carlo",
""
],
[
"Zen",
"Freddy P.",
""
]
] | Following recent developments in discrete gravity, we study geometrical variables (angles and forms) of simplices in the discrete geometry point of view. Some of our relatively new results include: new ways of writing a set of simplices using vectorial (differential form) and coordinate-free pictures, and a consistent ... |
gr-qc/0404052 | Jorge Pullin | Cayetano Di Bartolo, Rodolfo Gambini, Jorge Pullin | Consistent and mimetic discretizations in general relativity | 14 pages, Revtex, no figures, final version to appear in JMP | J.Math.Phys. 46 (2005) 032501 | 10.1063/1.1841483 | LSU-REL-041204 | gr-qc | null | A discretization of a continuum theory with constraints or conserved
quantities is called mimetic if it mirrors the conserved laws or constraints of
the continuum theory at the discrete level. Such discretizations have been
found useful in continuum mechanics and in electromagnetism. We have recently
introduced a new... | [
{
"created": "Mon, 12 Apr 2004 20:46:44 GMT",
"version": "v1"
},
{
"created": "Sun, 30 May 2004 17:39:19 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Jun 2004 03:08:43 GMT",
"version": "v3"
},
{
"created": "Mon, 1 Nov 2004 21:41:02 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Di Bartolo",
"Cayetano",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | A discretization of a continuum theory with constraints or conserved quantities is called mimetic if it mirrors the conserved laws or constraints of the continuum theory at the discrete level. Such discretizations have been found useful in continuum mechanics and in electromagnetism. We have recently introduced a new t... |
2407.00283 | Yu-Xiao Liu | Sen Yang, Yu-Peng Zhang, Tao Zhu, Li Zhao, and Yu-Xiao Liu | Gravitational waveforms from periodic orbits around a quantum-corrected
black hole | 16 pages, 12 figures, and 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme mass-ratio inspirals are crucial sources for future space-based
gravitational wave detections. Gravitational waveforms emitted by extreme
mass-ratio inspirals are closely related to the orbital dynamics of small
celestial objects, which vary with the underlying spacetime geometry. Despite
the tremendous succe... | [
{
"created": "Sat, 29 Jun 2024 02:25:32 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Yang",
"Sen",
""
],
[
"Zhang",
"Yu-Peng",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhao",
"Li",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Extreme mass-ratio inspirals are crucial sources for future space-based gravitational wave detections. Gravitational waveforms emitted by extreme mass-ratio inspirals are closely related to the orbital dynamics of small celestial objects, which vary with the underlying spacetime geometry. Despite the tremendous success... |
gr-qc/9609002 | Michael Reisenberger | Michael P. Reisenberger | A left-handed simplicial action for euclidean general relativity | Version 3. Adds current home address + slight corrections to
references of version 2. Version 2 = substantially clarified form of version
1. 29 pages, 4 figures, Latex, uses psfig.sty to insert postscript figures.
psfig.sty included in mailing, also available from this archive | Class.Quant.Grav. 14 (1997) 1753-1770 | 10.1088/0264-9381/14/7/012 | null | gr-qc | null | An action for simplicial euclidean general relativity involving only
left-handed fields is presented. The simplicial theory is shown to converge to
continuum general relativity in the Plebanski formulation as the simplicial
complex is refined. This contrasts with the Regge model for which Miller and
Brewin have shown... | [
{
"created": "Fri, 30 Aug 1996 14:14:59 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Apr 1997 23:05:21 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Jul 1997 23:12:19 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Reisenberger",
"Michael P.",
""
]
] | An action for simplicial euclidean general relativity involving only left-handed fields is presented. The simplicial theory is shown to converge to continuum general relativity in the Plebanski formulation as the simplicial complex is refined. This contrasts with the Regge model for which Miller and Brewin have shown t... |
gr-qc/0401072 | Muhammad Sharif | M. Sharif | Momentum and Angular Momentum in the Expanding Universe | null | Astrophys.Space Sci. 262 (1999) 297-304 | null | null | gr-qc | null | A new approach has been used to evaluate the momentum and angular momentum of
the isotropic and homogeneous cosmological models. It is shown that the results
obtained for momentum exactly coincide with those already available in the
literature. However, the angular momentum expression coincides only for the
closed Fr... | [
{
"created": "Fri, 16 Jan 2004 12:23:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sharif",
"M.",
""
]
] | A new approach has been used to evaluate the momentum and angular momentum of the isotropic and homogeneous cosmological models. It is shown that the results obtained for momentum exactly coincide with those already available in the literature. However, the angular momentum expression coincides only for the closed Frie... |
gr-qc/0509123 | Plamen Fiziev | P. P. Fiziev | Exact Solutions of Regge-Wheeler Equation and Quasi-Normal Modes of
Compact Objects | latex file, 25 pages, 4 figures, new references, new results and new
Appendix added, some comments and corrections in the text made. Accepted for
publication in Classical and Quantum Gravity, 2006, simplification of
notations, changes in the norm in some formulas, corrections in references | Class.Quant.Grav.23:2447-2468,2006 | 10.1088/0264-9381/23/7/015 | SU-THPH-2005-09-01 | gr-qc | null | The well-known Regge-Wheeler equation describes the axial perturbations of
Schwarzschild metric in the linear approximation. From a mathematical point of
view it presents a particular case of the confluent Heun equation and can be
solved exactly, due to recent mathematical developments. We present the basic
propertie... | [
{
"created": "Fri, 30 Sep 2005 09:11:55 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Oct 2005 13:39:16 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Jan 2006 09:22:34 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Feb 2006 11:10:25 GMT",
"version": "v4"
},
{
"cr... | 2014-11-17 | [
[
"Fiziev",
"P. P.",
""
]
] | The well-known Regge-Wheeler equation describes the axial perturbations of Schwarzschild metric in the linear approximation. From a mathematical point of view it presents a particular case of the confluent Heun equation and can be solved exactly, due to recent mathematical developments. We present the basic properties ... |
1501.03405 | Ana Hudomal | V. Dmitra\v{s}inovi\'c, Milovan \v{S}uvakov, and Ana Hudomal | Gravitational Waves from Periodic Three-Body Systems | 5 pages, 2 figures | Phys. Rev. Lett. 113, 101102 (2014) | 10.1103/PhysRevLett.113.101102 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three bodies moving in a periodic orbit under the influence of Newtonian
gravity ought to emit gravitational waves. We have calculated the gravitational
radiation quadrupolar waveforms and the corresponding luminosities for the
13+11 recently discovered three-body periodic orbits in Newtonian gravity.
These waves cle... | [
{
"created": "Wed, 14 Jan 2015 16:43:31 GMT",
"version": "v1"
}
] | 2015-01-15 | [
[
"Dmitrašinović",
"V.",
""
],
[
"Šuvakov",
"Milovan",
""
],
[
"Hudomal",
"Ana",
""
]
] | Three bodies moving in a periodic orbit under the influence of Newtonian gravity ought to emit gravitational waves. We have calculated the gravitational radiation quadrupolar waveforms and the corresponding luminosities for the 13+11 recently discovered three-body periodic orbits in Newtonian gravity. These waves clear... |
2201.12804 | Sreekanth Harikumar | Sreekanth Harikumar, Marek Biesiada | Moffat's Modified Gravity tested on X-COP galaxy clusters | null | null | 10.1140/epjc/s10052-022-10204-4 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Scalar Tensor Vector Gravity(STVG) is a fully covariant Lorentz invariant
alternative theory of gravity also called as MOdified Gravity(MOG) which
modifies General Relativity(GR) with dynamical massive vector field and scalar
fields. In STVG the mass $\mu$ of the vector field $\phi$ and the Universal
gravitational co... | [
{
"created": "Sun, 30 Jan 2022 12:56:56 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2022 19:33:24 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Harikumar",
"Sreekanth",
""
],
[
"Biesiada",
"Marek",
""
]
] | Scalar Tensor Vector Gravity(STVG) is a fully covariant Lorentz invariant alternative theory of gravity also called as MOdified Gravity(MOG) which modifies General Relativity(GR) with dynamical massive vector field and scalar fields. In STVG the mass $\mu$ of the vector field $\phi$ and the Universal gravitational cons... |
1308.5008 | Hedvika Kadlecova | Hedvika Kadlecov\'a | Gravitational field of gyratons on various background spacetimes | 155 pages, 10 figures, doctoral thesis | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | In this work we have found and analyzed several gyraton solutions on various
non--trivial backgrounds in the large Kundt class of spacetimes. Namely, the
gyraton solutions on direct product spacetimes, gyraton solutions on Melvin
universe and its generalization which includes the cosmological constant. These
solution... | [
{
"created": "Thu, 22 Aug 2013 22:10:55 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Aug 2013 16:41:00 GMT",
"version": "v2"
}
] | 2013-08-27 | [
[
"Kadlecová",
"Hedvika",
""
]
] | In this work we have found and analyzed several gyraton solutions on various non--trivial backgrounds in the large Kundt class of spacetimes. Namely, the gyraton solutions on direct product spacetimes, gyraton solutions on Melvin universe and its generalization which includes the cosmological constant. These solutions ... |
1005.0779 | Konstantin Yakunin | Konstantin N Yakunin, Pedro Marronetti, Anthony Mezzacappa, Stephen W
Bruenn, Ching-Tsai Lee, Merek A Chertkow, W Raphael Hix, John M Blondin, Eric
J Lentz, O E Bronson Messer and Shin'ichirou Yoshida | Gravitational Waves from Core Collapse Supernovae | 10 pages, 5 figures | Class.Quant.Grav.27:194005,2010 | 10.1088/0264-9381/27/19/194005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the gravitational wave signatures for a suite of axisymmetric core
collapse supernova models with progenitors masses between 12 and 25 solar
masses. These models are distinguished by the fact they explode and contain
essential physics (in particular, multi-frequency neutrino transport and
general relativit... | [
{
"created": "Wed, 5 May 2010 15:42:42 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jul 2010 21:21:23 GMT",
"version": "v2"
}
] | 2010-11-03 | [
[
"Yakunin",
"Konstantin N",
""
],
[
"Marronetti",
"Pedro",
""
],
[
"Mezzacappa",
"Anthony",
""
],
[
"Bruenn",
"Stephen W",
""
],
[
"Lee",
"Ching-Tsai",
""
],
[
"Chertkow",
"Merek A",
""
],
[
"Hix",
"W Raphael",
... | We present the gravitational wave signatures for a suite of axisymmetric core collapse supernova models with progenitors masses between 12 and 25 solar masses. These models are distinguished by the fact they explode and contain essential physics (in particular, multi-frequency neutrino transport and general relativity)... |
1305.0326 | Neil J. Cornish | Neil J. Cornish and A. Sesana | Pulsar Timing Array Analysis for Black Hole Backgrounds | 10 pages, 5 figures | null | 10.1088/0264-9381/30/22/224005 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An astrophysical population of supermassive black hole binaries is thought to
be the strongest source of gravitational waves in the frequency range covered
by Pulsar Timing Arrays (PTAs). A potential cause for concern is that the
standard cross-correlation method used in PTA data analysis assumes that the
signals are... | [
{
"created": "Thu, 2 May 2013 02:10:22 GMT",
"version": "v1"
}
] | 2014-01-23 | [
[
"Cornish",
"Neil J.",
""
],
[
"Sesana",
"A.",
""
]
] | An astrophysical population of supermassive black hole binaries is thought to be the strongest source of gravitational waves in the frequency range covered by Pulsar Timing Arrays (PTAs). A potential cause for concern is that the standard cross-correlation method used in PTA data analysis assumes that the signals are i... |
2107.10360 | Cooper Watson | C. K. Watson, W. Julius, M. Gorban, D. D. McNutt, E. W. Davis, and G.
B. Cleaver | An Invariant Characterization of the Levi-Civita Spacetimes | null | null | 10.3390/sym13081469 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the years 1917-1919 Tullio Levi-Civita published a number of papers
presenting new solutions to Einstein's equations. This work, while partially
translated, remains largely inaccessible to English speaking authors. In this
paper we review these solutions, and present them in a modern, readable manner.
We will also... | [
{
"created": "Wed, 21 Jul 2021 21:38:25 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Aug 2021 18:41:14 GMT",
"version": "v2"
}
] | 2021-08-17 | [
[
"Watson",
"C. K.",
""
],
[
"Julius",
"W.",
""
],
[
"Gorban",
"M.",
""
],
[
"McNutt",
"D. D.",
""
],
[
"Davis",
"E. W.",
""
],
[
"Cleaver",
"G. B.",
""
]
] | In the years 1917-1919 Tullio Levi-Civita published a number of papers presenting new solutions to Einstein's equations. This work, while partially translated, remains largely inaccessible to English speaking authors. In this paper we review these solutions, and present them in a modern, readable manner. We will also c... |
1810.01259 | Edward Wilson-Ewing | Edward Wilson-Ewing | A relational Hamiltonian for group field theory | 11 pages. v2: Clarifications added, typos corrected and references
added | Phys. Rev. D 99, 086017 (2019) | 10.1103/PhysRevD.99.086017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a massless scalar field as a clock variable, the Legendre transform of
the group field theory Lagrangian gives a relational Hamiltonian. In the
classical theory, it is natural to define 'equal relational time' Poisson
brackets, where 'equal time' corresponds to equal values of the scalar field
clock. The quantu... | [
{
"created": "Tue, 2 Oct 2018 14:00:57 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2019 16:17:45 GMT",
"version": "v2"
}
] | 2019-05-01 | [
[
"Wilson-Ewing",
"Edward",
""
]
] | Using a massless scalar field as a clock variable, the Legendre transform of the group field theory Lagrangian gives a relational Hamiltonian. In the classical theory, it is natural to define 'equal relational time' Poisson brackets, where 'equal time' corresponds to equal values of the scalar field clock. The quantum ... |
1905.13723 | Jelle Hartong | Dennis Hansen, Jelle Hartong, Niels A. Obers | Non-relativistic expansion of the Einstein-Hilbert Lagrangian | Proceedings of MG15 meeting, session on Applied Newton-Cartan
Geometry, 6 pages, v2: minor corrections | null | null | EMPG-19-16; NORDITA 2019-052 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a systematic technique to expand the Einstein-Hilbert Lagrangian
in inverse powers of the speed of light squared. The corresponding result for
the non-relativistic gravity Lagrangian is given up to next-to-next-to-leading
order. The techniques are universal and can be used to expand any Lagrangian
theory w... | [
{
"created": "Fri, 31 May 2019 17:07:40 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jan 2020 09:20:38 GMT",
"version": "v2"
}
] | 2020-01-30 | [
[
"Hansen",
"Dennis",
""
],
[
"Hartong",
"Jelle",
""
],
[
"Obers",
"Niels A.",
""
]
] | We present a systematic technique to expand the Einstein-Hilbert Lagrangian in inverse powers of the speed of light squared. The corresponding result for the non-relativistic gravity Lagrangian is given up to next-to-next-to-leading order. The techniques are universal and can be used to expand any Lagrangian theory who... |
0707.1079 | M Hossain Ali | M. Hossain Ali | Charged Particles' Tunneling from Hot-NUT-Kerr-Newman-Kasuya Spacetime | To appear in: Int. J. Theor. Phys | Int J Theor Phys (2008) 47: 2203--2217 | 10.1007/s10773-008-9652-y | null | gr-qc hep-th | null | We study the Hawking radiation as charged particles' tunneling across the
horizons of the Hot-NUT-Kerr-Newman-Kasuya spacetime by considering the
spacetime background as dynamical and incorporating the self-gravitation effect
of the emitted particles when the energy conservation, the angular momentum
conservation, an... | [
{
"created": "Sat, 7 Jul 2007 10:18:18 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Nov 2007 06:59:03 GMT",
"version": "v2"
},
{
"created": "Tue, 13 May 2008 04:30:53 GMT",
"version": "v3"
}
] | 2008-08-11 | [
[
"Ali",
"M. Hossain",
""
]
] | We study the Hawking radiation as charged particles' tunneling across the horizons of the Hot-NUT-Kerr-Newman-Kasuya spacetime by considering the spacetime background as dynamical and incorporating the self-gravitation effect of the emitted particles when the energy conservation, the angular momentum conservation, and ... |
1910.10473 | Gaurav Khanna | Nur E. M. Rifat, Scott E. Field, Gaurav Khanna, Vijay Varma | A Surrogate Model for Gravitational Wave Signals from Comparable- to
Large- Mass-Ratio Black Hole Binaries | 8 pages, 4 figures; includes improved modeling of the subdominant
modes and a comparison to a high-mass ratio NR simulation; EMRI surrogate
model is now publicly available at bhptoolkit.org | Phys. Rev. D 101, 081502 (2020) | 10.1103/PhysRevD.101.081502 | null | gr-qc astro-ph.HE physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave signals from compact astrophysical sources such as those
observed by LIGO and Virgo require a high-accuracy, theory-based waveform model
for the analysis of the recorded signal. Current inspiral-merger-ringdown
models are calibrated only up to moderate mass ratios, thereby limiting their
applicabil... | [
{
"created": "Wed, 23 Oct 2019 11:41:10 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2020 00:32:33 GMT",
"version": "v2"
}
] | 2020-04-29 | [
[
"Rifat",
"Nur E. M.",
""
],
[
"Field",
"Scott E.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Varma",
"Vijay",
""
]
] | Gravitational wave signals from compact astrophysical sources such as those observed by LIGO and Virgo require a high-accuracy, theory-based waveform model for the analysis of the recorded signal. Current inspiral-merger-ringdown models are calibrated only up to moderate mass ratios, thereby limiting their applicabilit... |
gr-qc/0508025 | Robert Beig | Robert Beig, Michael Wernig-Pichler | On the motion of a compact elastic body | 12 pages, with slight corrections, to be published in
Commun.Math.Phys | Commun.Math.Phys.271:455-465,2007 | 10.1007/s00220-007-0205-7 | null | gr-qc | null | We study the problem of motion of a relativistic, ideal elastic solid with
free surface boundary by casting the equations in material form ("Lagrangian
coordinates"). By applying a basic theorem due to Koch, we prove short-time
existence and uniqueness for solutions close to a trivial solution. This
trivial, or natur... | [
{
"created": "Sun, 7 Aug 2005 14:09:40 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Feb 2007 13:07:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Beig",
"Robert",
""
],
[
"Wernig-Pichler",
"Michael",
""
]
] | We study the problem of motion of a relativistic, ideal elastic solid with free surface boundary by casting the equations in material form ("Lagrangian coordinates"). By applying a basic theorem due to Koch, we prove short-time existence and uniqueness for solutions close to a trivial solution. This trivial, or natural... |
1805.03037 | Stefano Viaggiu | Stefano Viaggiu | Statistical description of massless excitations within a sphere with a
linear equation of state and the dark energy case | Accepted for publication on Int. J. Mod. Phys. A | Int. J. Mod. Phys. A, 33, 1850074 (2018) | 10.1142/S0217751X18500744 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we continue the investigations present in \cite{1}-\cite{3}. In
particular, we extend the theorem proved in \cite{3} to any massless excitation
in a given spherical box. As a first interesting result, we show that it is
possible, contrary to the black hole case studied in detail in \cite{1,2,3}, to
buil... | [
{
"created": "Fri, 4 May 2018 06:27:49 GMT",
"version": "v1"
}
] | 2018-05-09 | [
[
"Viaggiu",
"Stefano",
""
]
] | In this paper we continue the investigations present in \cite{1}-\cite{3}. In particular, we extend the theorem proved in \cite{3} to any massless excitation in a given spherical box. As a first interesting result, we show that it is possible, contrary to the black hole case studied in detail in \cite{1,2,3}, to build ... |
1507.04684 | Suresh Kumar | Suresh Kumar | Consistency of the nonflat $\Lambda$CDM model with the new result from
BOSS | 12 pages, 6 figures; Some typos fixed; Matches the version published
in Physical Review D | Phys. Rev. D 92, 103512 (2015) | 10.1103/PhysRevD.92.103512 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using 137,562 quasars in the redshift range $2.1\leq z\leq3.5$ from the Data
Release 11 (DR11) of the Baryon Oscillation Spectroscopic Survey (BOSS) of
Sloan Digital Sky Survey (SDSS)-III, the BOSS-SDSS collaboration estimated the
expansion rate $H(z=2.34)=222\pm7$ km/s/Mpc of Universe, and reported that this
value i... | [
{
"created": "Mon, 13 Jul 2015 13:18:45 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Aug 2015 16:08:51 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Oct 2015 12:06:37 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Dec 2015 12:26:29 GMT",
"version": "v4"
}
] | 2015-12-02 | [
[
"Kumar",
"Suresh",
""
]
] | Using 137,562 quasars in the redshift range $2.1\leq z\leq3.5$ from the Data Release 11 (DR11) of the Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky Survey (SDSS)-III, the BOSS-SDSS collaboration estimated the expansion rate $H(z=2.34)=222\pm7$ km/s/Mpc of Universe, and reported that this value is ... |
2203.11948 | Yurii Ignat'ev | Yu. G. Ignat'ev | Gravitational - Scalar Instability of a Two-Component Degenerate System
of Scalar Charged Fermions with Asymmetric Higgs Interaction | 14 pages, 12 figures, 26 referenses | Gravit. Cosmol. 28 (2022) 25 | 10.1134/S0202289322010078 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the previously formulated mathematical model of a statistical system
with scalar interaction of fermions and the theory of gravitational-scalar
instability of a cosmological model based on a two-component statistical system
of scalar-charged degenerate fermions, a numerical model of the cosmological
evolutio... | [
{
"created": "Tue, 22 Mar 2022 16:41:22 GMT",
"version": "v1"
}
] | 2022-03-24 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | Based on the previously formulated mathematical model of a statistical system with scalar interaction of fermions and the theory of gravitational-scalar instability of a cosmological model based on a two-component statistical system of scalar-charged degenerate fermions, a numerical model of the cosmological evolution ... |
2312.15486 | Ghulam Mustafa | G. Mustafa | Ricci inverse gravity wormholes | 14 pages, 11 figures, published in Physics Letters B | null | 10.1016/j.physletb.2023.138407 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The current study deals with the new wormhole solutions in the background of
fourth order new modified Ricci inverse gravity. Two new classes of the
wormhole solutions are analyzed by showing the valid region for the main part
of wormhole geometry under the affect of involved parameters. The embedded
diagrams for bot... | [
{
"created": "Sun, 24 Dec 2023 14:17:24 GMT",
"version": "v1"
}
] | 2023-12-27 | [
[
"Mustafa",
"G.",
""
]
] | The current study deals with the new wormhole solutions in the background of fourth order new modified Ricci inverse gravity. Two new classes of the wormhole solutions are analyzed by showing the valid region for the main part of wormhole geometry under the affect of involved parameters. The embedded diagrams for both ... |
1609.00824 | Rodrigo Turcati | Ramit Dey, Stefano Liberati, Rodrigo Turcati | AdS and dS black hole solutions in analogue gravity: The relativistic
and non-relativistic cases | 10 pages. Final version matching the published one in PRD | Phys. Rev. D 94, 104068 (2016) | 10.1103/PhysRevD.94.104068 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Schwarzschild black hole solutions in asymptotically Anti-de
Sitter (AdS) and de Sitter (dS) spaces may, up to a conformal factor, be
reproduced in the framework of analogue gravity. The aforementioned derivation
is performed using relativistic and non-relativistic Bose-Einstein condensates.
In addition,... | [
{
"created": "Sat, 3 Sep 2016 12:47:40 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2016 00:36:14 GMT",
"version": "v2"
}
] | 2016-12-01 | [
[
"Dey",
"Ramit",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Turcati",
"Rodrigo",
""
]
] | We show that Schwarzschild black hole solutions in asymptotically Anti-de Sitter (AdS) and de Sitter (dS) spaces may, up to a conformal factor, be reproduced in the framework of analogue gravity. The aforementioned derivation is performed using relativistic and non-relativistic Bose-Einstein condensates. In addition, w... |
1008.1964 | Foek Hioe | F.T. Hioe and David Kuebel | Hyperbolic-Type Orbits in the Schwarzschild Metric | 31 pages total, 8 tables, and 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact analytic expressions for various characteristics of the hyperbolic-type
orbits of a particle in the Schwarzschild geometry are presented. A useful
simple approximation formula is given for the case when the deviation from the
Newtonian hyperbolic path is very small.
| [
{
"created": "Wed, 11 Aug 2010 18:11:19 GMT",
"version": "v1"
}
] | 2010-08-12 | [
[
"Hioe",
"F. T.",
""
],
[
"Kuebel",
"David",
""
]
] | Exact analytic expressions for various characteristics of the hyperbolic-type orbits of a particle in the Schwarzschild geometry are presented. A useful simple approximation formula is given for the case when the deviation from the Newtonian hyperbolic path is very small. |
gr-qc/0409110 | Patricio S. Letelier | Maximiliano Ujevic and Patricio S. Letelier | On the stability of general relativistic geometric thin disks | 11 pages, RevTex. Phys Rev D (in press) | Phys.Rev. D70 (2004) 084015 | 10.1103/PhysRevD.70.084015 | null | gr-qc astro-ph | null | The stability of general relativistic thin disks is investigated under a
general first order perturbation of the energy momentum tensor. In particular,
we consider temporal, radial and azimuthal "test matter" perturbations of the
quantities involved on the plane $z=0$. We study the thin disks generated by
applying th... | [
{
"created": "Tue, 28 Sep 2004 17:41:17 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Ujevic",
"Maximiliano",
""
],
[
"Letelier",
"Patricio S.",
""
]
] | The stability of general relativistic thin disks is investigated under a general first order perturbation of the energy momentum tensor. In particular, we consider temporal, radial and azimuthal "test matter" perturbations of the quantities involved on the plane $z=0$. We study the thin disks generated by applying the ... |
2307.08697 | Tomas Andrade | Tomas Andrade, Juan Trenado, Simone Albanesi, Rossella Gamba,
Sebastiano Bernuzzi, Alessandro Nagar, Juan Calderon-Bustillo, Nicolas
Sanchis-Gual, Jose A. Font, William Cook, Boris Daszuta, Francesco Zappa, and
David Radice | Towards numerical-relativity informed effective-one-body waveforms for
dynamical capture black hole binaries | 21 pages, 15 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical captures of black holes may take place in dense stellar media due
to the emission of gravitational radiation during a close passage. Detection of
such events requires detailed modelling, since their phenomenology
qualitatively differs from that of quasi-circular binaries. Very few models can
deliver such wa... | [
{
"created": "Mon, 17 Jul 2023 17:57:45 GMT",
"version": "v1"
}
] | 2023-07-18 | [
[
"Andrade",
"Tomas",
""
],
[
"Trenado",
"Juan",
""
],
[
"Albanesi",
"Simone",
""
],
[
"Gamba",
"Rossella",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Calderon-Bustillo",
"Juan",
... | Dynamical captures of black holes may take place in dense stellar media due to the emission of gravitational radiation during a close passage. Detection of such events requires detailed modelling, since their phenomenology qualitatively differs from that of quasi-circular binaries. Very few models can deliver such wave... |
gr-qc/9904005 | Shinji Mukohyama | Shinji Mukohyama | Hartle-Hawking state is a maximum of entanglement entropy | Latex, 4 pages, Some comments are added on the "small backreaction
condition" | Phys.Rev. D61 (2000) 064015 | 10.1103/PhysRevD.61.064015 | YITP-99-17 | gr-qc hep-th | null | It is shown that the Hartle-Hawking state of a scalar field is a maximum of
entanglement entropy in the space of pure quantum states satisfying the
condition that backreaction is finite. In other words, the Hartle-Hawking state
is a curved-space analogue of the EPR state, which is also a maximum of
entanglement entro... | [
{
"created": "Fri, 2 Apr 1999 06:20:16 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Aug 1999 19:43:14 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Mukohyama",
"Shinji",
""
]
] | It is shown that the Hartle-Hawking state of a scalar field is a maximum of entanglement entropy in the space of pure quantum states satisfying the condition that backreaction is finite. In other words, the Hartle-Hawking state is a curved-space analogue of the EPR state, which is also a maximum of entanglement entropy... |
gr-qc/0309044 | L. K. Chavda | L.K.Chavda and Abhijit L.Chavda | Holeum,enigmas of cosmology and gravitational waves | 11 pages,1 table,formation of Holeum-stars in the galactic haloes and
the domain walls added,new keyword added,Discussion and Conclusions
revised,PDF | null | null | null | gr-qc astro-ph | null | The principle of nuclear democracy is invoked to prove the formation of
stable quantized gravitational bound states of primordial black holes called
Holeums. The latter come in four varieties: ordinary Holeums H, Black Holeums
BH, Hyper Holeums HH and the massless Lux Holeums LH.These Holeums are
invisible because th... | [
{
"created": "Mon, 8 Sep 2003 12:30:51 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Sep 2003 11:28:43 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jun 2004 11:05:09 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Chavda",
"L. K.",
""
],
[
"Chavda",
"Abhijit L.",
""
]
] | The principle of nuclear democracy is invoked to prove the formation of stable quantized gravitational bound states of primordial black holes called Holeums. The latter come in four varieties: ordinary Holeums H, Black Holeums BH, Hyper Holeums HH and the massless Lux Holeums LH.These Holeums are invisible because the ... |
0811.0782 | Saibal Ray | U. Mukhopadhyay, Saibal Ray, A. A. Usmani and Partha Pratim Ghosh | Time variable $\Lambda$ and the accelerating Universe | Latex, 10 pages, 2 figures, accepted in IJTP | Int.J.Theor.Phys.50:752-759,2011 | 10.1007/s10773-010-0611-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a deductive study of accelerating Universe and focus on the
importance of variable time-dependent $\Lambda$ in the Einstein's field
equations under the phenomenological assumption, $\Lambda =\alpha H^2$ for the
full physical range of $\alpha$. The relevance of variable $\Lambda$ with
regard to various key ... | [
{
"created": "Wed, 5 Nov 2008 17:40:23 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Nov 2008 20:25:43 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Dec 2010 10:10:01 GMT",
"version": "v3"
}
] | 2011-01-25 | [
[
"Mukhopadhyay",
"U.",
""
],
[
"Ray",
"Saibal",
""
],
[
"Usmani",
"A. A.",
""
],
[
"Ghosh",
"Partha Pratim",
""
]
] | We perform a deductive study of accelerating Universe and focus on the importance of variable time-dependent $\Lambda$ in the Einstein's field equations under the phenomenological assumption, $\Lambda =\alpha H^2$ for the full physical range of $\alpha$. The relevance of variable $\Lambda$ with regard to various key is... |
1302.3791 | Victor Eugen Ambru\c{s} | Victor E. Ambru\c{s} and Elizabeth Winstanley | Rotating fermions | 4 pages, 1 figure, Marcel Grossmann 13 meeting proceedings | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the rigidly rotating quantum thermal distribution of fermions
in flat space-time. We find that thermal states diverge on the speed of light
surface. We remove the divergences by enclosing the system inside a cylindrical
boundary and investigate thermal expectation values and the Casimir effect for
two ... | [
{
"created": "Fri, 15 Feb 2013 16:14:04 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Feb 2013 18:47:31 GMT",
"version": "v2"
}
] | 2013-02-19 | [
[
"Ambruş",
"Victor E.",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We investigate the rigidly rotating quantum thermal distribution of fermions in flat space-time. We find that thermal states diverge on the speed of light surface. We remove the divergences by enclosing the system inside a cylindrical boundary and investigate thermal expectation values and the Casimir effect for two se... |
2001.11439 | Aleksandar Mikovic | Aleksandar Mikovic | Piecewise Flat Metrics and Quantum Gravity | 17 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a physical piecewise linear metric associated to a Regge
triangulation of a smooth 4-manifold. We describe the basic properties of the
corresponding geometry in the cases of the Euclidean and the Minkowski
signature. In the Minkowski case, we describe the Regge action and how to
define the corresponding ... | [
{
"created": "Thu, 30 Jan 2020 16:38:02 GMT",
"version": "v1"
}
] | 2020-01-31 | [
[
"Mikovic",
"Aleksandar",
""
]
] | We introduce a physical piecewise linear metric associated to a Regge triangulation of a smooth 4-manifold. We describe the basic properties of the corresponding geometry in the cases of the Euclidean and the Minkowski signature. In the Minkowski case, we describe the Regge action and how to define the corresponding pa... |
2202.02480 | Woei Chet Lim | Woei Chet Lim | Numerical confirmations of joint spike transitions in $G_2$ cosmologies | 18 pages, 5 figures | Class. Quantum Grav. 39 (2022) 065010 | 10.1088/1361-6382/ac5011 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We produce numerical evidence that the joint spike transitions between Kasner
eras of $G_2$ cosmologies are described by the non-orthogonally transitive
$G_2$ spike solution. A new matching procedure is developed for this purpose.
| [
{
"created": "Sat, 5 Feb 2022 03:31:19 GMT",
"version": "v1"
}
] | 2022-02-22 | [
[
"Lim",
"Woei Chet",
""
]
] | We produce numerical evidence that the joint spike transitions between Kasner eras of $G_2$ cosmologies are described by the non-orthogonally transitive $G_2$ spike solution. A new matching procedure is developed for this purpose. |
1002.1533 | Nima Khosravi | Nima Khosravi | Particle Creation from Vacuum by Lorentz Violation | 9 pages, 2 figures | Gen.Rel.Grav.43:1417-1426,2011 | 10.1007/s10714-010-1124-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the vacuum state in presence of Lorentz violation can be
followed by a particle-full universe that represents the current status of the
universe. In this model the modification in dispersion relation (Lorentz
violation) is picked up representing the regime of quantum gravity. The result
can be interp... | [
{
"created": "Mon, 8 Feb 2010 06:00:45 GMT",
"version": "v1"
}
] | 2011-04-22 | [
[
"Khosravi",
"Nima",
""
]
] | It is shown that the vacuum state in presence of Lorentz violation can be followed by a particle-full universe that represents the current status of the universe. In this model the modification in dispersion relation (Lorentz violation) is picked up representing the regime of quantum gravity. The result can be interpre... |
2012.07973 | Joseph Schindler | Joseph Schindler, Evan Frangipane, Anthony Aguirre | Unitarity and the information problem in an explicit model of black hole
evaporation | 14 pages, 11 figures. v2: additional references | Class. Quantum Grav. 38 075025 (2021) | 10.1088/1361-6382/abdf25 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the black hole information problem in an explicitly defined
spacetime modelling black hole evaporation. Using this context we review basic
aspects of the problem, with a particular effort to be unambiguous about subtle
topics, for instance precisely what is meant by entropy in various
circumstances. We th... | [
{
"created": "Mon, 14 Dec 2020 22:15:48 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2021 18:14:57 GMT",
"version": "v2"
}
] | 2021-04-16 | [
[
"Schindler",
"Joseph",
""
],
[
"Frangipane",
"Evan",
""
],
[
"Aguirre",
"Anthony",
""
]
] | We consider the black hole information problem in an explicitly defined spacetime modelling black hole evaporation. Using this context we review basic aspects of the problem, with a particular effort to be unambiguous about subtle topics, for instance precisely what is meant by entropy in various circumstances. We then... |
gr-qc/0102009 | Parampreet Singh | Naresh Dadhich | Subtle is the Gravity | This is the Vaidya - Raichaudhary Endowment Fund Award Lecture
delivered on 30th Jan. 01 at the 21st meeting of IAGRG, held at Nagpur | null | null | null | gr-qc astro-ph hep-th physics.class-ph | null | In this lecture I build up the motivation for relativity and gravitation
based on general principles and common sense considerations which should fall
in the sphere of appreciation of a general reader. There is a novel way of
looking at things and understanding them in a more direct physical terms which
should be of ... | [
{
"created": "Sat, 3 Feb 2001 08:15:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dadhich",
"Naresh",
""
]
] | In this lecture I build up the motivation for relativity and gravitation based on general principles and common sense considerations which should fall in the sphere of appreciation of a general reader. There is a novel way of looking at things and understanding them in a more direct physical terms which should be of in... |
1512.06768 | Jan Steinhoff | Jan Steinhoff | Spin effects on the dynamics of compact binaries | 7 pages, Proceedings of the 14th Marcel Grossman Meeting. v2: added
ref | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compact binaries are the most promising source for the advanced gravitational
wave detectors, which will start operating this year. The influence of spin on
the binary evolution is an important consequence of general relativity and can
be large. It is argued that the spin supplementary condition, which is related
to ... | [
{
"created": "Mon, 21 Dec 2015 19:00:05 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jan 2016 20:30:56 GMT",
"version": "v2"
}
] | 2016-01-28 | [
[
"Steinhoff",
"Jan",
""
]
] | Compact binaries are the most promising source for the advanced gravitational wave detectors, which will start operating this year. The influence of spin on the binary evolution is an important consequence of general relativity and can be large. It is argued that the spin supplementary condition, which is related to th... |
1708.09228 | Gyula Fodor | Gyula Fodor and P\'eter Forg\'acs | Anti-de Sitter geon families | 65 pages, minor changes | null | 10.1103/PhysRevD.96.084027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A detailed perturbative construction of globally regular, asymptotically
anti-de Sitter (AdS) time-periodic solutions of Einstein's equations with a
negative cosmological constant (AdS geons) is presented. Starting with the most
general superposition of the $l=2$ even parity (scalar) eigenmodes of AdS at
linear order... | [
{
"created": "Wed, 30 Aug 2017 12:04:01 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2017 12:53:46 GMT",
"version": "v2"
}
] | 2017-10-25 | [
[
"Fodor",
"Gyula",
""
],
[
"Forgács",
"Péter",
""
]
] | A detailed perturbative construction of globally regular, asymptotically anti-de Sitter (AdS) time-periodic solutions of Einstein's equations with a negative cosmological constant (AdS geons) is presented. Starting with the most general superposition of the $l=2$ even parity (scalar) eigenmodes of AdS at linear order, ... |
gr-qc/0404079 | J. Alberto Lobo | J. Alberto Lobo | Lisa | 22 pages, LaTeX2e, PS/EPS figures, talk given at ERE-2003, Alicante
(Spain), September-2003, will appear in Conference Proceedings | null | null | null | gr-qc | null | The extreme weakness of the gravitational interaction has as one of its
consequences that appreciable intensities of gravitational waves (GW) can only
be generated in large size astrophysical and cosmological sources. Earth based
detectors face unsurmountable problems to be sensitive to signals at
frequencies below 1... | [
{
"created": "Sat, 17 Apr 2004 13:09:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lobo",
"J. Alberto",
""
]
] | The extreme weakness of the gravitational interaction has as one of its consequences that appreciable intensities of gravitational waves (GW) can only be generated in large size astrophysical and cosmological sources. Earth based detectors face unsurmountable problems to be sensitive to signals at frequencies below 10 ... |
2005.05534 | Snehasish Bhattacharjee | Snehasish Bhattacharjee | Gravitational baryogenesis in extended teleparallel theories of gravity | Published in Physics of the Dark Universe | Physics of the Dark Universe, 30 (2020) 100612 | 10.1016/j.dark.2020.100612 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The article communicates gravitational baryogenesis in non-minimal $f(T)$
gravity and $f(T,B)$ teleparallel gravity where $T$ denote the torsion scalar
and $B$ a boundary term. These extended teleparallel theories of gravity differ
from the usual $f(T)$ gravity and therefore could provide key insights in
expounding t... | [
{
"created": "Tue, 12 May 2020 03:26:37 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jun 2020 03:52:52 GMT",
"version": "v2"
}
] | 2020-06-08 | [
[
"Bhattacharjee",
"Snehasish",
""
]
] | The article communicates gravitational baryogenesis in non-minimal $f(T)$ gravity and $f(T,B)$ teleparallel gravity where $T$ denote the torsion scalar and $B$ a boundary term. These extended teleparallel theories of gravity differ from the usual $f(T)$ gravity and therefore could provide key insights in expounding the... |
1105.0781 | Barry Wardell | Ian Hinder, Barry Wardell and Eloisa Bentivegna | Falloff of the Weyl scalars in binary black hole spacetimes | 7 pages, 3 figures, published version | Phys.Rev.D84:024036,2011 | 10.1103/PhysRevD.84.024036 | AEI-2011-025 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The peeling theorem of general relativity predicts that the Weyl curvature
scalars Psi_n (n=0...4), when constructed from a suitable null tetrad in an
asymptotically flat spacetime, fall off asymptotically as r^(n-5) along
outgoing radial null geodesics. This leads to the interpretation of Psi_4 as
outgoing gravitati... | [
{
"created": "Wed, 4 May 2011 10:03:46 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2013 16:51:10 GMT",
"version": "v2"
}
] | 2013-06-13 | [
[
"Hinder",
"Ian",
""
],
[
"Wardell",
"Barry",
""
],
[
"Bentivegna",
"Eloisa",
""
]
] | The peeling theorem of general relativity predicts that the Weyl curvature scalars Psi_n (n=0...4), when constructed from a suitable null tetrad in an asymptotically flat spacetime, fall off asymptotically as r^(n-5) along outgoing radial null geodesics. This leads to the interpretation of Psi_4 as outgoing gravitation... |
2308.00897 | Gansukh Tumurtushaa | Seoktae Koh, Seong Chan Park, and Gansukh Tumurtushaa | Higgs Inflation with a Gauss-Bonnet term | 11 pages, three figures (Fig. 1 and related text updated),
comments/suggestions welcome | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Higgs inflation with a Gauss-Bonnet term is studied in the Einstein frame.
Our model features two coupling functions, $\Omega^2(\phi)$ and $\omega(\phi)$,
coupled to the Ricci scalar and Gauss-Bonnet combinations. We found a special
relation $\Omega^2 \propto \omega$ sets the system a lot more simplified;
therefore, ... | [
{
"created": "Wed, 2 Aug 2023 01:26:17 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Aug 2023 07:39:56 GMT",
"version": "v2"
},
{
"created": "Sat, 23 Mar 2024 07:07:21 GMT",
"version": "v3"
}
] | 2024-03-26 | [
[
"Koh",
"Seoktae",
""
],
[
"Park",
"Seong Chan",
""
],
[
"Tumurtushaa",
"Gansukh",
""
]
] | Higgs inflation with a Gauss-Bonnet term is studied in the Einstein frame. Our model features two coupling functions, $\Omega^2(\phi)$ and $\omega(\phi)$, coupled to the Ricci scalar and Gauss-Bonnet combinations. We found a special relation $\Omega^2 \propto \omega$ sets the system a lot more simplified; therefore, we... |
gr-qc/0703152 | Matthew Pitkin | Matthew Pitkin and Graham Woan (University of Glasgow) | Binary system delays and timing noise in searches for gravitational
waves from known pulsars | 10 pages, 11 figures, accepted by Phys. Rev. D | Phys.Rev.D76:042006,2007 | 10.1103/PhysRevD.76.042006 | LIGO-P060063-02-Z | gr-qc astro-ph | null | The majority of fast millisecond pulsars are in binary systems, so that any
periodic signal they emit is modulated by both Doppler and relativistic
effects. Here we show how well-established binary models can be used to account
for these effects in searches for gravitational waves from known pulsars within
binary sys... | [
{
"created": "Fri, 30 Mar 2007 10:58:12 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jun 2007 09:30:08 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pitkin",
"Matthew",
"",
"University of Glasgow"
],
[
"Woan",
"Graham",
"",
"University of Glasgow"
]
] | The majority of fast millisecond pulsars are in binary systems, so that any periodic signal they emit is modulated by both Doppler and relativistic effects. Here we show how well-established binary models can be used to account for these effects in searches for gravitational waves from known pulsars within binary syste... |
1709.09501 | Charles Board | Charles V. R. Board and John D. Barrow | Cosmological Models in Energy-Momentum-Squared Gravity | Accepted manuscript, incorporates erratum | Phys. Rev. D 96, 123517 (2017) | 10.1103/PhysRevD.96.123517 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological effects of adding terms of higher-order in the
usual energy-momentum tensor to the matter lagrangian of general relativity.
This is in contrast to most studies of higher-order gravity which focus on
generalising the Einstein-Hilbert curvature contribution to the lagrangian. The
resulting cos... | [
{
"created": "Wed, 27 Sep 2017 13:32:50 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2017 14:04:17 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Jan 2018 11:31:11 GMT",
"version": "v3"
},
{
"created": "Mon, 15 Apr 2019 13:28:21 GMT",
"version": "v4"
}
] | 2019-04-16 | [
[
"Board",
"Charles V. R.",
""
],
[
"Barrow",
"John D.",
""
]
] | We study the cosmological effects of adding terms of higher-order in the usual energy-momentum tensor to the matter lagrangian of general relativity. This is in contrast to most studies of higher-order gravity which focus on generalising the Einstein-Hilbert curvature contribution to the lagrangian. The resulting cosmo... |
1710.03794 | Maximiliano Isi | Maximiliano Isi and Alan J. Weinstein | Probing gravitational wave polarizations with signals from compact
binary coalescences | Technical note | null | null | LIGO-P1700276 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this technical note, we study the possibility of using networks of
ground-based detectors to directly measure gravitational-wave polarizations
using signals from compact binary coalescences. We present a simple data
analysis method to partially achieve this, assuming presence of a strong signal
well-captured by a ... | [
{
"created": "Tue, 10 Oct 2017 19:26:39 GMT",
"version": "v1"
}
] | 2017-10-12 | [
[
"Isi",
"Maximiliano",
""
],
[
"Weinstein",
"Alan J.",
""
]
] | In this technical note, we study the possibility of using networks of ground-based detectors to directly measure gravitational-wave polarizations using signals from compact binary coalescences. We present a simple data analysis method to partially achieve this, assuming presence of a strong signal well-captured by a GR... |
1710.02156 | Emanuele Berti | Vishal Baibhav, Emanuele Berti, Vitor Cardoso, Gaurav Khanna | Black Hole Spectroscopy: Systematic Errors and Ringdown Energy Estimates | 7 pages, 5 figures, 1 table | Phys. Rev. D 97, 044048 (2018) | 10.1103/PhysRevD.97.044048 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relaxation of a distorted black hole to its final state provides
important tests of general relativity within the reach of current and upcoming
gravitational wave facilities. In black hole perturbation theory, this phase
consists of a simple linear superposition of exponentially damped sinusoids
(the quasinormal ... | [
{
"created": "Thu, 5 Oct 2017 18:00:16 GMT",
"version": "v1"
}
] | 2018-03-07 | [
[
"Baibhav",
"Vishal",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Khanna",
"Gaurav",
""
]
] | The relaxation of a distorted black hole to its final state provides important tests of general relativity within the reach of current and upcoming gravitational wave facilities. In black hole perturbation theory, this phase consists of a simple linear superposition of exponentially damped sinusoids (the quasinormal mo... |
1905.04268 | J\'er\'emy Auffinger | Alexandre Arbey, J\'er\'emy Auffinger | BlackHawk v2.0: A public code for calculating the Hawking evaporation
spectra of any black hole distribution | 44 pages. BlackHawk v2.0 can be obtained at
https://blackhawk.hepforge.org/ | Eur.Phys.J. C79 (2019) no.8, 693 | 10.1140/epjc/s10052-019-7161-1 | CERN-TH-2019-067 | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe BlackHawk, a public C program for calculating the Hawking
evaporation spectra of any black hole distribution. This program allows the
users to compute the primary and secondary spectra of stable or long-lived
particles generated by Hawking radiation of the distribution of black holes,
and to study their e... | [
{
"created": "Fri, 10 May 2019 17:17:25 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2020 10:15:35 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Aug 2021 09:39:36 GMT",
"version": "v3"
}
] | 2021-08-09 | [
[
"Arbey",
"Alexandre",
""
],
[
"Auffinger",
"Jérémy",
""
]
] | We describe BlackHawk, a public C program for calculating the Hawking evaporation spectra of any black hole distribution. This program allows the users to compute the primary and secondary spectra of stable or long-lived particles generated by Hawking radiation of the distribution of black holes, and to study their evo... |
1804.10374 | Alexander Zakharov | Alexander F. Zakharov | Constraints on tidal charge of the supermassive black hole at the
Galactic Center with trajectories of bright stars | 9 pages, references were added, minor typos were corrected | null | 10.1140/epjc/s10052-018-6166-5 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As it was pointed out recently in Hees et al. (2017), observations of stars
near the Galactic Center with current and future facilities provide an unique
tool to test general relativity (GR) and alternative theories of gravity in a
strong gravitational field regime. In particular, the authors showed that the
Yukawa g... | [
{
"created": "Fri, 27 Apr 2018 08:03:50 GMT",
"version": "v1"
},
{
"created": "Sat, 5 May 2018 03:42:48 GMT",
"version": "v2"
},
{
"created": "Tue, 8 May 2018 15:59:46 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Jun 2018 13:29:55 GMT",
"version": "v4"
},
{
"cre... | 2018-09-26 | [
[
"Zakharov",
"Alexander F.",
""
]
] | As it was pointed out recently in Hees et al. (2017), observations of stars near the Galactic Center with current and future facilities provide an unique tool to test general relativity (GR) and alternative theories of gravity in a strong gravitational field regime. In particular, the authors showed that the Yukawa gra... |
0904.3276 | Frans Klinkhamer | F.R. Klinkhamer | Gluon condensate, modified gravity, and the accelerating Universe | 24 pages in preprint style; v6: published version | Phys.Rev.D81:043006,2010 | 10.1103/PhysRevD.81.043006 | KA-TP-02-2009 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been suggested recently to study the dynamics of a gravitating gluon
condensate q in the context of a spatially flat Friedmann-Robertson-Walker
universe. The expansion of the Universe (or, more generally, the presence of a
nonvanishing Ricci curvature scalar R) perturbs the gluon condensate and may
induce a no... | [
{
"created": "Tue, 21 Apr 2009 19:05:10 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Apr 2009 09:33:44 GMT",
"version": "v2"
},
{
"created": "Mon, 4 May 2009 18:55:46 GMT",
"version": "v3"
},
{
"created": "Sat, 27 Jun 2009 13:26:14 GMT",
"version": "v4"
},
{
"cr... | 2010-04-06 | [
[
"Klinkhamer",
"F. R.",
""
]
] | It has been suggested recently to study the dynamics of a gravitating gluon condensate q in the context of a spatially flat Friedmann-Robertson-Walker universe. The expansion of the Universe (or, more generally, the presence of a nonvanishing Ricci curvature scalar R) perturbs the gluon condensate and may induce a nona... |
1912.12298 | Alexander Gallego Cadavid Dr | Alexander Gallego Cadavid and J.R. Villanueva | No slow-roll inflation \`a la Generalized Chaplygin Gas in General
Relativity | Accepted for publication in JCAP. 19 pages. 9 figures | JCAP12(2020)044 | 10.1088/1475-7516/2020/12/044 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Generalized Chaplygin Gas (GCG) model is characterized by the equation of
state $P = -A \rho^{-\alpha}$, where $A>0$ and $\alpha < 1$. The model has been
extensively studied due to its interesting properties and applicability in
several contexts, from late-time acceleration to primordial inflation.
Nonetheless we... | [
{
"created": "Thu, 26 Dec 2019 20:34:32 GMT",
"version": "v1"
},
{
"created": "Tue, 26 May 2020 21:21:57 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Jul 2020 21:18:21 GMT",
"version": "v3"
},
{
"created": "Wed, 4 Nov 2020 20:07:46 GMT",
"version": "v4"
}
] | 2021-01-01 | [
[
"Cadavid",
"Alexander Gallego",
""
],
[
"Villanueva",
"J. R.",
""
]
] | The Generalized Chaplygin Gas (GCG) model is characterized by the equation of state $P = -A \rho^{-\alpha}$, where $A>0$ and $\alpha < 1$. The model has been extensively studied due to its interesting properties and applicability in several contexts, from late-time acceleration to primordial inflation. Nonetheless we s... |
gr-qc/0002095 | Carlo Rovelli | Michael P. Reisenberger, Carlo Rovelli | Spacetime as a Feynman diagram: the connection formulation | 32 pages, 2 figures | Class.Quant.Grav. 18 (2001) 121-140 | 10.1088/0264-9381/18/1/308 | null | gr-qc hep-th | null | Spin foam models are the path integral counterparts to loop quantized
canonical theories. In the last few years several spin foam models of gravity
have been proposed, most of which live on finite simplicial lattice spacetime.
The lattice truncates the presumably infinite set of gravitational degrees of
freedom down ... | [
{
"created": "Tue, 29 Feb 2000 14:45:32 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Mar 2000 11:05:36 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Reisenberger",
"Michael P.",
""
],
[
"Rovelli",
"Carlo",
""
]
] | Spin foam models are the path integral counterparts to loop quantized canonical theories. In the last few years several spin foam models of gravity have been proposed, most of which live on finite simplicial lattice spacetime. The lattice truncates the presumably infinite set of gravitational degrees of freedom down to... |
1402.2384 | Daniele Pranzetti | Daniele Pranzetti | Turaev-Viro amplitudes from 2+1 Loop Quantum Gravity | 23 pages, many figures; v3: minor modifications to match published
version | Phys. Rev. D 89, 084058 (2014) | 10.1103/PhysRevD.89.084058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Turaev-Viro state sum model provides a covariant spin foam quantization
of three-dimensional Riemannian gravity with a positive cosmological constant
{\Lambda}. We complete the program to canonically quantize the theory in the BF
formulation using the formalism of Loop Quantum Gravity. In particular, we show
firs... | [
{
"created": "Tue, 11 Feb 2014 07:04:08 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Feb 2014 17:19:38 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Apr 2014 07:43:16 GMT",
"version": "v3"
}
] | 2014-04-23 | [
[
"Pranzetti",
"Daniele",
""
]
] | The Turaev-Viro state sum model provides a covariant spin foam quantization of three-dimensional Riemannian gravity with a positive cosmological constant {\Lambda}. We complete the program to canonically quantize the theory in the BF formulation using the formalism of Loop Quantum Gravity. In particular, we show first ... |
2301.02109 | Orfeu Bertolami | Orfeu Bertolami, Cl\'audio Gomes, Paulo M. S\'a | Theories of gravity with nonminimal matter-curvature coupling and the de
Sitter swampland conjectures | 12 pages | null | 10.1103/PhysRevD.107.084009 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We discuss, in the context of alternative theories of gravity with nonminimal
coupling between matter and curvature, if inflationary solutions driven by a
single scalar field can be reconciled with the swampland conjectures about the
emergence of de Sitter solutions in string theory. We find that the slow-roll
condit... | [
{
"created": "Thu, 5 Jan 2023 15:32:49 GMT",
"version": "v1"
}
] | 2023-04-19 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Gomes",
"Cláudio",
""
],
[
"Sá",
"Paulo M.",
""
]
] | We discuss, in the context of alternative theories of gravity with nonminimal coupling between matter and curvature, if inflationary solutions driven by a single scalar field can be reconciled with the swampland conjectures about the emergence of de Sitter solutions in string theory. We find that the slow-roll conditio... |
1903.10351 | Mario Novello | M. Novello and A. E. S. Hartmann | Is the electromagnetic field responsible for the cosmic acceleration in
late times? | In this paper we present a new way to describe the origin of the
cosmological era of accelerated expansion. We show that such acceleration may
be associated to a late effect of the non minimal coupling between the
electromagnetic field with gravity in the realm of general relativity | null | 10.1142/S0217751X19500830 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in the realm of general relativity a non minimal coupling
between the electromagnetic and the gravitational fields may produce an era of
accelerated expansion.
| [
{
"created": "Fri, 22 Mar 2019 13:20:29 GMT",
"version": "v1"
}
] | 2019-06-26 | [
[
"Novello",
"M.",
""
],
[
"Hartmann",
"A. E. S.",
""
]
] | We show that in the realm of general relativity a non minimal coupling between the electromagnetic and the gravitational fields may produce an era of accelerated expansion. |
2402.17835 | Kieran Wood | Kieran Wood, Paul M. Saffin, Anastasios Avgoustidis | Black Holes in Multi-Metric Gravity | 27 pages, no figures. Current version: fixed typos, added DOI | null | 10.1103/PhysRevD.109.124006 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct a wide class of black hole solutions to the general theory of
ghost free multi-metric gravity in arbitrary spacetime dimension, extending and
generalising the known results in 4-dimensional dRGT massive gravity and
bigravity. The solutions are split into three generic classes based on whether
the metrics... | [
{
"created": "Tue, 27 Feb 2024 19:00:09 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 16:35:04 GMT",
"version": "v2"
}
] | 2024-06-05 | [
[
"Wood",
"Kieran",
""
],
[
"Saffin",
"Paul M.",
""
],
[
"Avgoustidis",
"Anastasios",
""
]
] | We construct a wide class of black hole solutions to the general theory of ghost free multi-metric gravity in arbitrary spacetime dimension, extending and generalising the known results in 4-dimensional dRGT massive gravity and bigravity. The solutions are split into three generic classes based on whether the metrics c... |
1903.09913 | Xiangyun Fu fu | Xiangyun Fu, Lu Zhou and Jun Chen | Testing Cosmic Distance-Duality Relation from Future Gravitational Wave
Standard Sirens | Submitted to PRD 17pages,3figs | Phys. Rev. D 99, 083523 (2019) | 10.1103/PhysRevD.99.083523 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A validation of the cosmic distance-duality relation (CDDR) is crucial
because any observational departure from it could be a signal of new physics.
In this work, we explore the potentialities of luminosity distance data from
the gravitational wave (GW) standard sirens of future Einstein Telescope (ET)
to test the CD... | [
{
"created": "Sun, 24 Mar 2019 02:44:18 GMT",
"version": "v1"
}
] | 2019-05-01 | [
[
"Fu",
"Xiangyun",
""
],
[
"Zhou",
"Lu",
""
],
[
"Chen",
"Jun",
""
]
] | A validation of the cosmic distance-duality relation (CDDR) is crucial because any observational departure from it could be a signal of new physics. In this work, we explore the potentialities of luminosity distance data from the gravitational wave (GW) standard sirens of future Einstein Telescope (ET) to test the CDDR... |
2305.04367 | Calin Iuliu Lazaroiu | Calin Iuliu Lazaroiu | Natural observables and dynamical approximations in multifield
cosmological models | 36 pages, 2 figures | Int. J. Modern Physics A. 38 (2023) 32, 2343007 | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | I give a geometric construction of certain first order natural dynamical
observables in multifield cosmological models with arbitrary target space
topology and discuss a system of related dynamical approximations and regimes
for such models.
| [
{
"created": "Sun, 7 May 2023 20:02:26 GMT",
"version": "v1"
}
] | 2024-07-09 | [
[
"Lazaroiu",
"Calin Iuliu",
""
]
] | I give a geometric construction of certain first order natural dynamical observables in multifield cosmological models with arbitrary target space topology and discuss a system of related dynamical approximations and regimes for such models. |
1402.4974 | Michal Bejger | J. Aasi, B. P. Abbott, R. Abbott, T. Abbott, M. R. Abernathy, T.
Accadia, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X.
Adhikari, C. Affeldt, M. Agathos, N. Aggarwal, O. D. Aguiar, A. Ain, P.
Ajith, A. Alemic, B. Allen, A. Allocca, D. Amariutei, M. Andersen, R.
Anderson, S. B. Anderson, W. G. An... | Implementation of an F-statistic all-sky search for continuous
gravitational waves in Virgo VSR1 data | 27 pages, 10 figures, submitted to CQG, corrected affiliations and
autors list; Science summary of results available at
http://www.ligo.org/science/Publication-VSR1CWAllSkyFstat/index.php | null | 10.1088/0264-9381/31/16/165014 | LIGO Document No. LIGO-P1300133 | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an implementation of the $\mathcal{F}$-statistic to carry out the
first search in data from the Virgo laser interferometric gravitational wave
detector for periodic gravitational waves from a priori unknown, isolated
rotating neutron stars. We searched a frequency $f_0$ range from 100 Hz to 1
kHz and the f... | [
{
"created": "Thu, 20 Feb 2014 11:53:07 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Feb 2014 12:38:07 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Apr 2014 09:20:50 GMT",
"version": "v3"
}
] | 2015-06-18 | [
[
"Aasi",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Accadia",
"T.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K.",
... | We present an implementation of the $\mathcal{F}$-statistic to carry out the first search in data from the Virgo laser interferometric gravitational wave detector for periodic gravitational waves from a priori unknown, isolated rotating neutron stars. We searched a frequency $f_0$ range from 100 Hz to 1 kHz and the fre... |
2103.03624 | Deyou Chen | Deyou Chen, Chuanhong Gao, Xianming Liu, Chengye Yu | The correspondence between shadow and test field in a four-dimensional
charged Einstein-Gauss-Bonnet black hole | 17 pages | Eur. Phys. J. C 81, 700 (2021) | 10.1140/epjc/s10052-021-09510-0 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the photon sphere, shadow radius and
quasinormal modes of a four-dimensional charged Einstein-Gauss-Bonnet black
hole. The perturbation of a massless scalar field in the black hole's
background is adopted. The quasinormal modes are gotten by the $6th$ order WKB
approximation approach and... | [
{
"created": "Fri, 5 Mar 2021 12:08:32 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 2021 09:25:45 GMT",
"version": "v2"
},
{
"created": "Sun, 8 Aug 2021 02:21:21 GMT",
"version": "v3"
}
] | 2021-09-01 | [
[
"Chen",
"Deyou",
""
],
[
"Gao",
"Chuanhong",
""
],
[
"Liu",
"Xianming",
""
],
[
"Yu",
"Chengye",
""
]
] | In this paper, we investigate the photon sphere, shadow radius and quasinormal modes of a four-dimensional charged Einstein-Gauss-Bonnet black hole. The perturbation of a massless scalar field in the black hole's background is adopted. The quasinormal modes are gotten by the $6th$ order WKB approximation approach and s... |
gr-qc/9901004 | Aharon Davidson | Aharon Davidson and David Karasik | Quantum Gravity of a Brane-like Universe | Revtex, 4 pages, no figures (honorable mentioned, Gravity Research
Foundation 1998) | Mod.Phys.Lett. A13 (1998) 2187-2192 | 10.1142/S0217732398002321 | null | gr-qc hep-th | null | Quantum gravity of a brane-like Universe is formulated, and its Einstein
limit is approached. Regge-Teitelboim embedding of Arnowitt-Deser-Misner
formalism is carried out. Invoking a novel Lagrange multiplier, accompanying
the lapse function and the shift vector, we derive the quadratic Hamiltonian
and the correspond... | [
{
"created": "Sat, 2 Jan 1999 11:40:14 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Davidson",
"Aharon",
""
],
[
"Karasik",
"David",
""
]
] | Quantum gravity of a brane-like Universe is formulated, and its Einstein limit is approached. Regge-Teitelboim embedding of Arnowitt-Deser-Misner formalism is carried out. Invoking a novel Lagrange multiplier, accompanying the lapse function and the shift vector, we derive the quadratic Hamiltonian and the correspondin... |
1512.04095 | Vasilis Oikonomou | V.K. Oikonomou | Constraints on Singular Evolution from Gravitational Baryogenesis | Manuscript prepared for submission in International Journal of
Geometric Methods in Modern Physics; References added and clarifications | null | 10.1142/S021988781650033X | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how the gravitational baryogenesis mechanism can potentially
constrain the form of a Type IV singularity. Specifically, we study two
different models with interesting phenomenology, that realize two distinct Type
IV singularities, one occurring at the end of inflation and one during the
radiation domin... | [
{
"created": "Sun, 13 Dec 2015 18:22:40 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Dec 2015 13:58:17 GMT",
"version": "v2"
}
] | 2016-03-23 | [
[
"Oikonomou",
"V. K.",
""
]
] | We investigate how the gravitational baryogenesis mechanism can potentially constrain the form of a Type IV singularity. Specifically, we study two different models with interesting phenomenology, that realize two distinct Type IV singularities, one occurring at the end of inflation and one during the radiation dominat... |
gr-qc/9909061 | Hiromi Saida | Hiromi Saida and Jiro Soda | Statistical Entropy of BTZ Black Hole in Higher Curvature Gravity | 9 pages, no figure, submitted to Physics Letters B | Phys.Lett. B471 (2000) 358-366 | 10.1016/S0370-2693(99)01405-7 | KUCP0141 | gr-qc hep-th | null | For the BTZ black hole in the Einstein gravity, a statistical entropy has
been calculated to be equal to the Bekenstein-Hawking entropy. In this paper,
the statistical entropy of the BTZ black hole in the higher curvature gravity
is calculated and shown to be equal to the one derived by using the Noether
charge metho... | [
{
"created": "Tue, 21 Sep 1999 06:39:51 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Nov 1999 09:39:50 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Saida",
"Hiromi",
""
],
[
"Soda",
"Jiro",
""
]
] | For the BTZ black hole in the Einstein gravity, a statistical entropy has been calculated to be equal to the Bekenstein-Hawking entropy. In this paper, the statistical entropy of the BTZ black hole in the higher curvature gravity is calculated and shown to be equal to the one derived by using the Noether charge method.... |
1302.7100 | Damiano Anselmi | Damiano Anselmi | Properties Of The Classical Action Of Quantum Gravity | 21 pages; v2: minor changes and proof corrections, JHEP | JHEP 1305 (2013) 028 | 10.1007/JHEP05(2013)028 | IFUP-TH 2013/07 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The classical action of quantum gravity, determined by renormalization,
contains infinitely many independent couplings and can be expressed in
different perturbatively equivalent ways. We organize it in a convenient form,
which is based on invariants constructed with the Weyl tensor. We show that the
FLRW metrics are... | [
{
"created": "Thu, 28 Feb 2013 07:05:54 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2013 13:26:34 GMT",
"version": "v2"
}
] | 2013-05-14 | [
[
"Anselmi",
"Damiano",
""
]
] | The classical action of quantum gravity, determined by renormalization, contains infinitely many independent couplings and can be expressed in different perturbatively equivalent ways. We organize it in a convenient form, which is based on invariants constructed with the Weyl tensor. We show that the FLRW metrics are e... |
1806.00158 | Huan Yang | Huan Yang, William E. East, Vasileios Paschalidis, Frans Pretorius,
Raissa F. P. Mendes | Evolution of Highly Eccentric Binary Neutron Stars Including Tidal
Effects | 17 pages, 6 figures | Phys. Rev. D 98, 044007 (2018) | 10.1103/PhysRevD.98.044007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is the first in a series of studies aimed at understanding the
dynamics of highly eccentric binary neutron stars, and constructing an
appropriate gravitational-waveform model for detection. Such binaries are
possible sources for ground-based gravitational wave detectors, and are
expected to form through dyn... | [
{
"created": "Fri, 1 Jun 2018 01:25:00 GMT",
"version": "v1"
}
] | 2018-08-08 | [
[
"Yang",
"Huan",
""
],
[
"East",
"William E.",
""
],
[
"Paschalidis",
"Vasileios",
""
],
[
"Pretorius",
"Frans",
""
],
[
"Mendes",
"Raissa F. P.",
""
]
] | This work is the first in a series of studies aimed at understanding the dynamics of highly eccentric binary neutron stars, and constructing an appropriate gravitational-waveform model for detection. Such binaries are possible sources for ground-based gravitational wave detectors, and are expected to form through dynam... |
1909.10336 | Rodrigo von Marttens | R. von Marttens, H. A. Borges, S. Carneiro, J. S. Alcaniz and W.
Zimdahl | Unphysical properties in a class of interacting dark energy models | 17 pages, 7 figures. Accepted for publication in the EPJC | Eur. Phys. J. C 80, 1110 (2020) | 10.1140/epjc/s10052-020-08682-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Models with non-gravitational interactions between the dark matter and dark
energy components are an alternative to the standard cosmological scenario.
These models are characterized by an interaction term, and a frequently used
parameterization is $Q = 3\xi H \rho_{x}$, where $H$ is the Hubble parameter
and $\rho_{x... | [
{
"created": "Fri, 20 Sep 2019 15:50:39 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Nov 2020 19:31:09 GMT",
"version": "v2"
}
] | 2020-12-07 | [
[
"von Marttens",
"R.",
""
],
[
"Borges",
"H. A.",
""
],
[
"Carneiro",
"S.",
""
],
[
"Alcaniz",
"J. S.",
""
],
[
"Zimdahl",
"W.",
""
]
] | Models with non-gravitational interactions between the dark matter and dark energy components are an alternative to the standard cosmological scenario. These models are characterized by an interaction term, and a frequently used parameterization is $Q = 3\xi H \rho_{x}$, where $H$ is the Hubble parameter and $\rho_{x}$... |
1510.01169 | Ai Viet Nguyen Dr | Viet Ai Nguyen and Du Tien Pham | Gravity and nonabelian gauge fields in noncommutative space-time | 5 pages, with some corrections | Modern Physics Letters A 32(18):1750095 (2017) | 10.1142/S021773231750095X | IT-VNU Preprint CS-01/2015 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Noncommutative geometric construction of gravity in the two sheeted spacetime
can be viewed as a discretized version of a Kaluza-Klein theory. In this paper,
we show that it is possible to incorporate the nonabelian gauge fields in the
same framework. The generalized Hilbert-Einstein action is gauge invariant only
in... | [
{
"created": "Mon, 5 Oct 2015 14:39:48 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Nov 2015 14:06:52 GMT",
"version": "v2"
}
] | 2020-09-25 | [
[
"Nguyen",
"Viet Ai",
""
],
[
"Pham",
"Du Tien",
""
]
] | Noncommutative geometric construction of gravity in the two sheeted spacetime can be viewed as a discretized version of a Kaluza-Klein theory. In this paper, we show that it is possible to incorporate the nonabelian gauge fields in the same framework. The generalized Hilbert-Einstein action is gauge invariant only in t... |
1908.08140 | Iarley P. Lobo Dr | V. B. Bezerra, I. P. Lobo, J. P. Morais Gra\c{c}a and Luis C. N.
Santos | Effects of quantum corrections on the criticality and efficiency of
black holes surrounded by a perfect fluid | 10 pages, 12 figures. References added | null | 10.1140/epjc/s10052-019-7482-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some properties of the extended phase space of a quantum-corrected
Schwarzschild black hole surrounded by a perfect fluid. In particular we
demonstrate that, due to the quantum correction, there exist first and second
order phase transitions for a certain range of the state parameter of the
perfect fluid, an... | [
{
"created": "Wed, 21 Aug 2019 23:29:22 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 2019 19:19:12 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Bezerra",
"V. B.",
""
],
[
"Lobo",
"I. P.",
""
],
[
"Graça",
"J. P. Morais",
""
],
[
"Santos",
"Luis C. N.",
""
]
] | We study some properties of the extended phase space of a quantum-corrected Schwarzschild black hole surrounded by a perfect fluid. In particular we demonstrate that, due to the quantum correction, there exist first and second order phase transitions for a certain range of the state parameter of the perfect fluid, and ... |
1007.3985 | Mubasher Jamil | Kayoomars Karami, Ahmad Sheykhi, Mubasher Jamil, F. Felegary and M.M.
Soltanzadeh | Thermodynamical description of interacting entropy-corrected new
agegraphic dark energy | 8 pages, version accepted for publication in Europhysics Letters
(2011) | Europhys.Lett.93:69001,2011 | 10.1209/0295-5075/93/69001 | arXiv:1007.3985v3 [physics.gen-ph] | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To explain the accelerating universe driven by dark energy, a so-called
"entropy-corrected new agegraphic dark energy" (ECNADE), was recently proposed
with the help of quantum corrections to the entropy-area relation in the
framework of loop quantum cosmology. Using this definition, we study its
thermodynamical featu... | [
{
"created": "Wed, 21 Jul 2010 06:34:55 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Feb 2011 13:34:48 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Feb 2011 12:28:46 GMT",
"version": "v3"
}
] | 2011-04-21 | [
[
"Karami",
"Kayoomars",
""
],
[
"Sheykhi",
"Ahmad",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Felegary",
"F.",
""
],
[
"Soltanzadeh",
"M. M.",
""
]
] | To explain the accelerating universe driven by dark energy, a so-called "entropy-corrected new agegraphic dark energy" (ECNADE), was recently proposed with the help of quantum corrections to the entropy-area relation in the framework of loop quantum cosmology. Using this definition, we study its thermodynamical feature... |
1611.00193 | Hamid Reza Sepangi | Erfan Masaeli, Meysam Motaharfar and Hamid Reza Sepangi | General Scalar-Tensor cosmology: Analytical solutions via Noether
symmetry | 17 pages, to appear in EPJC | Eur.Phys.J. C77 (2017) no.2, 124 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the cosmology of a general Scalar-Tensor theory which encompasses
generalized Brans-Dicke theory, Gauss-Bonnet gravity, non-minimal derivative
gravity, generalized Galileon gravity and also the general k-essence type
models. Instead of taking into account phenomenological considerations we adopt
a Noether ... | [
{
"created": "Tue, 1 Nov 2016 11:52:08 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2017 08:59:58 GMT",
"version": "v2"
}
] | 2017-03-07 | [
[
"Masaeli",
"Erfan",
""
],
[
"Motaharfar",
"Meysam",
""
],
[
"Sepangi",
"Hamid Reza",
""
]
] | We analyze the cosmology of a general Scalar-Tensor theory which encompasses generalized Brans-Dicke theory, Gauss-Bonnet gravity, non-minimal derivative gravity, generalized Galileon gravity and also the general k-essence type models. Instead of taking into account phenomenological considerations we adopt a Noether sy... |
2105.10642 | Jiawei Hu | Jiawei Hu, Hongwei Yu | High frequency background gravitational waves from spontaneous emission
of gravitons by hydrogen and helium | 14 pages, 1 figure, accepted for publication in Eur. Phys. J. C | Eur. Phys. J. C 81, 470 (2021) | 10.1140/epjc/s10052-021-09263-w | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A direct consequence of quantization of gravity would be the existence of
gravitons. Therefore, spontaneous transition of an atom from an excited state
to a lower-lying energy state accompanied with the emission of a graviton is
expected. In this paper, we take the gravitons emitted by hydrogen and helium
in the Univ... | [
{
"created": "Sat, 22 May 2021 05:20:34 GMT",
"version": "v1"
}
] | 2021-06-03 | [
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | A direct consequence of quantization of gravity would be the existence of gravitons. Therefore, spontaneous transition of an atom from an excited state to a lower-lying energy state accompanied with the emission of a graviton is expected. In this paper, we take the gravitons emitted by hydrogen and helium in the Univer... |
1103.5114 | Ngangbam Ibohal | Ng. Ibohal and T. Ibungochouba | Hawking's radiation in non-stationary rotating de Sitter background | 13 pages, LaTex format, accepted for publication Astrophysics and
Space Science, Springer; Journal ID: 10509, Article ID: 606, Date 2011-01-15 | Astrophys.Space Sci.333:175-185,2011 | 10.1007/s10509-011-0606-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking's radiation effect of Klein-Gordon scalar field, Dirac particles and
Maxwell's electromagnetic field in the non-stationary rotating de Sitter
cosmological space-time is investigated by using a method of generalized
tortoise co-ordinates transformation. The locations and the temperatures of the
cosmological ho... | [
{
"created": "Sat, 26 Mar 2011 07:26:28 GMT",
"version": "v1"
}
] | 2011-04-28 | [
[
"Ibohal",
"Ng.",
""
],
[
"Ibungochouba",
"T.",
""
]
] | Hawking's radiation effect of Klein-Gordon scalar field, Dirac particles and Maxwell's electromagnetic field in the non-stationary rotating de Sitter cosmological space-time is investigated by using a method of generalized tortoise co-ordinates transformation. The locations and the temperatures of the cosmological hori... |
1303.0491 | Edwin J. Son | Edwin J. Son, Wontae Kim | Complementary role of the pressure in the black hole thermodynamics | v2. version to appear in PRD; 7 pages, references added | Phys. Rev. D 87, 067502 (2013) | 10.1103/PhysRevD.87.067502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In black hole thermodynamics of certain models, the thermodynamic first law
may contain the pressure term. The corresponding entropy follows the area law
whereas the thermodynamic energy is not the same with the black hole mass. If
the pressure can be decomposed into two parts and recombined with the original
thermod... | [
{
"created": "Sun, 3 Mar 2013 12:33:59 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Mar 2013 06:16:42 GMT",
"version": "v2"
}
] | 2013-04-02 | [
[
"Son",
"Edwin J.",
""
],
[
"Kim",
"Wontae",
""
]
] | In black hole thermodynamics of certain models, the thermodynamic first law may contain the pressure term. The corresponding entropy follows the area law whereas the thermodynamic energy is not the same with the black hole mass. If the pressure can be decomposed into two parts and recombined with the original thermodyn... |
2106.08280 | Dina Traykova | Dina Traykova, Katy Clough, Thomas Helfer, Emanuele Berti, Pedro G.
Ferreira, Lam Hui | Dynamical friction from scalar dark matter in the relativistic regime | 17 pages, 13 figures, 1 table; Version as accepted in PRD - minor
changes | null | 10.1103/PhysRevD.104.103014 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Light bosonic scalars (e.g. axions) may form clouds around black holes via
superradiant instabilities, or via accretion if they form some component of the
dark matter. It has been suggested that their presence may lead to a
distinctive dephasing of the gravitational wave signal when a small compact
object spirals int... | [
{
"created": "Tue, 15 Jun 2021 16:45:55 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Sep 2021 08:03:40 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Oct 2021 10:38:25 GMT",
"version": "v3"
}
] | 2021-11-24 | [
[
"Traykova",
"Dina",
""
],
[
"Clough",
"Katy",
""
],
[
"Helfer",
"Thomas",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Ferreira",
"Pedro G.",
""
],
[
"Hui",
"Lam",
""
]
] | Light bosonic scalars (e.g. axions) may form clouds around black holes via superradiant instabilities, or via accretion if they form some component of the dark matter. It has been suggested that their presence may lead to a distinctive dephasing of the gravitational wave signal when a small compact object spirals into ... |
2012.14110 | Yuri Pavlov | A. A. Grib, Yu. V. Pavlov | Some effects of different coordinate systems in cosmology | 10 pages, no figures | Eur. Phys. J. Plus 136, 318 (2021) | 10.1140/epjp/s13360-021-01249-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of the dynamics of radial movement in different reference frames
used in cosmology is made. Use of different frames leads to the difference in
inertial forces resulting in different observable effects. The important effect
is the appearance in the system different from the synchronous one of the
accelera... | [
{
"created": "Mon, 28 Dec 2020 06:29:05 GMT",
"version": "v1"
},
{
"created": "Tue, 4 May 2021 09:27:51 GMT",
"version": "v2"
}
] | 2021-05-05 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | The analysis of the dynamics of radial movement in different reference frames used in cosmology is made. Use of different frames leads to the difference in inertial forces resulting in different observable effects. The important effect is the appearance in the system different from the synchronous one of the accelerati... |
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