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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1402.7048 | Frans Klinkhamer | F.R. Klinkhamer | Skyrmion spacetime defect | 12 pages, v7: published version | Phys. Rev. D 90, 024007 (2014) | 10.1103/PhysRevD.90.024007 | KA-TP-08-2014 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A finite-energy static classical solution is obtained for standard Einstein
gravity coupled to an $SO(3)\times SO(3)$ chiral model of scalars [a Skyrme
model]. This nonsingular localized solution has nontrivial topology for both
the spacetime manifold and the $SO(3)$ matter fields. The solution corresponds
to a singl... | [
{
"created": "Thu, 27 Feb 2014 20:05:11 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Mar 2014 19:32:35 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Mar 2014 20:13:58 GMT",
"version": "v3"
},
{
"created": "Mon, 31 Mar 2014 19:18:00 GMT",
"version": "v4"
},
{
"cre... | 2015-06-18 | [
[
"Klinkhamer",
"F. R.",
""
]
] | A finite-energy static classical solution is obtained for standard Einstein gravity coupled to an $SO(3)\times SO(3)$ chiral model of scalars [a Skyrme model]. This nonsingular localized solution has nontrivial topology for both the spacetime manifold and the $SO(3)$ matter fields. The solution corresponds to a single ... |
1906.02958 | Ramit Dey | Ramit Dey, Stefano Liberati, Zahra Mirzaiyan, Daniele Pranzetti | Black hole quantum atmosphere for freely falling observers | null | Phys. Lett. B 797, 134828 (2019) | 10.1016/j.physletb.2019.134828 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze Hawking radiation as perceived by a freely-falling observer and
try to draw an inference about the region of origin of the Hawking quanta. To
do so, first we calculate the energy density from the stress energy tensor, as
perceived by a freely-falling observer. Then we compare this with the energy
density c... | [
{
"created": "Fri, 7 Jun 2019 08:38:57 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Sep 2019 15:31:11 GMT",
"version": "v2"
}
] | 2019-09-27 | [
[
"Dey",
"Ramit",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Mirzaiyan",
"Zahra",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | We analyze Hawking radiation as perceived by a freely-falling observer and try to draw an inference about the region of origin of the Hawking quanta. To do so, first we calculate the energy density from the stress energy tensor, as perceived by a freely-falling observer. Then we compare this with the energy density com... |
1506.02388 | Farhad Darabi | Y. Heydarzade, H. Hadi, F. Darabi, A. Sheykhi | Emergent Universe in the Braneworld Scenario | 16 pages, Major revision | Eur. Phys. J. C, 76 6 (2016) 323 | 10.1140/epjc/s10052-016-4162-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to Padmanabhan's proposal, the difference between the surface
degrees of freedom and the bulk degrees of freedom in a region of space may
result in the acceleration of Universe expansion through the relation $\Delta
V/\Delta t = N_{\rm sur}-N_{\rm bulk}$ where $N_{\rm bulk}$ and $N_{\rm sur}$
are referred t... | [
{
"created": "Mon, 8 Jun 2015 08:10:23 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Mar 2016 14:30:35 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Jun 2016 14:40:45 GMT",
"version": "v3"
}
] | 2016-06-21 | [
[
"Heydarzade",
"Y.",
""
],
[
"Hadi",
"H.",
""
],
[
"Darabi",
"F.",
""
],
[
"Sheykhi",
"A.",
""
]
] | According to Padmanabhan's proposal, the difference between the surface degrees of freedom and the bulk degrees of freedom in a region of space may result in the acceleration of Universe expansion through the relation $\Delta V/\Delta t = N_{\rm sur}-N_{\rm bulk}$ where $N_{\rm bulk}$ and $N_{\rm sur}$ are referred to ... |
1505.05101 | Elena P. Savelova Dr. | A.A. Kirillov, E.P. Savelova | Origin of the logarithmic correction to the Newton's law in the presence
of a homogeneous gas of wormholes | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest a new scenario in which the Universe starts its evolution with a
fractal topological structure. This structure is described by a gas of
wormholes. It is shown that the polarization of such a gas in external fields
possesses a spatial dispersion, which results in a modification of the Newton's
law. The depe... | [
{
"created": "Sat, 16 May 2015 16:09:28 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Kirillov",
"A. A.",
""
],
[
"Savelova",
"E. P.",
""
]
] | We suggest a new scenario in which the Universe starts its evolution with a fractal topological structure. This structure is described by a gas of wormholes. It is shown that the polarization of such a gas in external fields possesses a spatial dispersion, which results in a modification of the Newton's law. The depend... |
1112.1466 | Matt Visser | Valentina Baccetti (Victoria University of Wellington), Kyle Tate
(Victoria University of Wellington), and Matt Visser (Victoria University of
Wellington) | Inertial frames without the relativity principle | V1: 42 pages; V2: now 43 pages; added 8 references, added brief
discussion of Carroll kinematics, added brief discussion of
Robertson-Mansouri-Sexl framework, added various minor clarifications. V3:
now 51 pages; added another 34 references; more discussion of DSR and
relative locality; various clarifications a... | null | 10.1007/JHEP05(2012)119 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ever since the work of von Ignatowsky circa 1910 it has been known (if not
always widely appreciated) that the relativity principle, combined with the
basic and fundamental physical assumptions of locality, linearity, and
isotropy, leads almost uniquely to either the Lorentz transformations of
special relativity or t... | [
{
"created": "Wed, 7 Dec 2011 03:34:02 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Dec 2011 01:26:38 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Apr 2012 19:27:44 GMT",
"version": "v3"
}
] | 2015-06-03 | [
[
"Baccetti",
"Valentina",
"",
"Victoria University of Wellington"
],
[
"Tate",
"Kyle",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | Ever since the work of von Ignatowsky circa 1910 it has been known (if not always widely appreciated) that the relativity principle, combined with the basic and fundamental physical assumptions of locality, linearity, and isotropy, leads almost uniquely to either the Lorentz transformations of special relativity or to ... |
0709.0934 | Ivan S. N. Booth | Ivan Booth | Two physical characteristics of numerical apparent horizons | 6 pages, 2 figures, conference proceedings loosely based on talk
given at Theory Canada III (Edmonton, Alberta, 2007). V2: Minor changes in
response to referees comments to improve clarity and fix typos. One reference
added | Can. J. Phys.86, 669-673 (2008) | 10.1139/P07-194 | null | gr-qc | null | This article translates some recent results on quasilocal horizons into the
language of $(3+1)$ general relativity so as to make them more useful to
numerical relativists. In particular quantities are described which
characterize how quickly an apparent horizon is evolving and how close it is to
either equilibrium or... | [
{
"created": "Thu, 6 Sep 2007 18:17:21 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Dec 2007 14:28:03 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Booth",
"Ivan",
""
]
] | This article translates some recent results on quasilocal horizons into the language of $(3+1)$ general relativity so as to make them more useful to numerical relativists. In particular quantities are described which characterize how quickly an apparent horizon is evolving and how close it is to either equilibrium or e... |
1209.5336 | Wolfgang Tichy | Wolfgang Tichy | Constructing quasi-equilibrium initial data for binary neutron stars
with arbitrary spins | fixed typos in Eq. (27), 8 pages, 3 figures | Phys. Rev. D 86, 064024 (2012) | 10.1103/PhysRevD.86.064024 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general neutron stars in binaries are spinning. Recently, a new
quasi-equilibrium approximation that includes a rotational velocity piece for
each star has been proposed to describe binary neutron stars with arbitrary
rotation states in quasi-circular orbits. We have implemented this
approximation numerically for ... | [
{
"created": "Mon, 24 Sep 2012 17:00:50 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Oct 2012 21:26:34 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Nov 2014 18:16:11 GMT",
"version": "v3"
}
] | 2015-06-11 | [
[
"Tichy",
"Wolfgang",
""
]
] | In general neutron stars in binaries are spinning. Recently, a new quasi-equilibrium approximation that includes a rotational velocity piece for each star has been proposed to describe binary neutron stars with arbitrary rotation states in quasi-circular orbits. We have implemented this approximation numerically for th... |
2212.08112 | Zhen Li | Zhen Li | Superradiance and quasinormal modes of the gravitational perturbation
around rotating hairy black hole | 11 pages, 3 tables, 7 figures | null | 10.1016/j.physletb.2023.137902 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The No Hair theorem in classical general relativity predicts that rotating
black holes are specified by the Kerr metric, which is uniquely identified by
the mass and spin. However, as a pioneering study beyond general relativity,
the rotating hairy black hole has been proposed, which encompasses the Kerr
black hole a... | [
{
"created": "Thu, 15 Dec 2022 19:56:27 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Apr 2023 08:41:21 GMT",
"version": "v2"
}
] | 2023-04-26 | [
[
"Li",
"Zhen",
""
]
] | The No Hair theorem in classical general relativity predicts that rotating black holes are specified by the Kerr metric, which is uniquely identified by the mass and spin. However, as a pioneering study beyond general relativity, the rotating hairy black hole has been proposed, which encompasses the Kerr black hole as ... |
2205.07254 | Jiri Podolsky | Jiri Podolsky, Roland Steinbauer | Penrose junction conditions with $\Lambda$: Geometric insights into
low-regularity metrics for impulsive gravitational waves | To appear in the topical volume "Singularity theorems, causality, and
all that (SCRI21)" https://link.springer.com/collections/hjjgajaagg honoring
Roger Penrose's accomplishments in mathematical relativity; final corrected
version, 27 pages, 7 figures | null | 10.1007/s10714-022-02977-6 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Impulsive gravitational waves in Minkowski space were introduced by Roger
Penrose at the end of the 1960s, and have been widely studied over the decades.
Here we focus on nonexpanding waves which later have been generalized to
impulses traveling in all constant-curvature backgrounds, i.e., the (anti-)de
Sitter univer... | [
{
"created": "Sun, 15 May 2022 10:45:21 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Aug 2022 12:24:13 GMT",
"version": "v2"
}
] | 2022-09-14 | [
[
"Podolsky",
"Jiri",
""
],
[
"Steinbauer",
"Roland",
""
]
] | Impulsive gravitational waves in Minkowski space were introduced by Roger Penrose at the end of the 1960s, and have been widely studied over the decades. Here we focus on nonexpanding waves which later have been generalized to impulses traveling in all constant-curvature backgrounds, i.e., the (anti-)de Sitter universe... |
gr-qc/0105107 | Hans-Juergen Schmidt | H.-J. Schmidt | On static spherically symmetric solutions of the Bach-Einstein
gravitational field equations | 12 pages, LaTeX, no figure | Astron.Nachr. 306 (1985) 67-70 | null | UNIPO-MATH-01-May-25 | gr-qc | null | For field equations of 4th order, following from a Lagrangian `Ricci scalar
plus Weyl scalar', it is shown (using methods of non-standard analysis) that in
a neighbourhood of Minkowski space there do not exist regular static
spherically symmetric solutions. With that (besides the known local expansions
about r = 0 an... | [
{
"created": "Mon, 28 May 2001 07:37:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schmidt",
"H. -J.",
""
]
] | For field equations of 4th order, following from a Lagrangian `Ricci scalar plus Weyl scalar', it is shown (using methods of non-standard analysis) that in a neighbourhood of Minkowski space there do not exist regular static spherically symmetric solutions. With that (besides the known local expansions about r = 0 and ... |
1401.7820 | Sergey Paston | A.A. Sheykin, D.A. Grad, S.A. Paston | Embeddings of the black holes in a flat space | LaTeX, 7 pages. Proceedings of "The XXI International Workshop High
Energy Physics and Quantum Field Theory" (QFTHEP 2013), Saint Petersburg
Area, Russia, 23-30 June, 2013 | Proceedings of Science, PoS(QFTHEP 2013)091 | 10.22323/1.183.0091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the explicit embeddings of static black holes. We obtain two new
minimal embeddings of the Schwarzchild-de Sitter metric which smoothly cover
both horizons of this metric. The lines of time for these embeddings are more
complicated than hyperbolas. Also we shortly discuss the possibility of using
non-hyperbo... | [
{
"created": "Thu, 30 Jan 2014 12:22:17 GMT",
"version": "v1"
}
] | 2020-10-16 | [
[
"Sheykin",
"A. A.",
""
],
[
"Grad",
"D. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | We study the explicit embeddings of static black holes. We obtain two new minimal embeddings of the Schwarzchild-de Sitter metric which smoothly cover both horizons of this metric. The lines of time for these embeddings are more complicated than hyperbolas. Also we shortly discuss the possibility of using non-hyperboli... |
1811.00046 | Ivan de Martino | Mariafelicia De Laurentis, Ivan De Martino, Ruth Lazkoz | Modified gravity revealed along geodesic tracks | 7 Pages, 2 figures. Accepted for publication on The European Physics
Journal C | Eur. Phys. J. C (2018) 78: 916 | 10.1140/epjc/s10052-018-6401-0 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of the dynamics of a two-body system in modified gravity
constitutes a more complex problem than in Newtonian gravity. Numerical methods
are typically needed to solve the equations of geodesics. Despite the
complexity of the problem, the study of a two-body system in $f(R)$ gravity
leads to a new exciting p... | [
{
"created": "Wed, 31 Oct 2018 18:19:16 GMT",
"version": "v1"
}
] | 2018-11-13 | [
[
"De Laurentis",
"Mariafelicia",
""
],
[
"De Martino",
"Ivan",
""
],
[
"Lazkoz",
"Ruth",
""
]
] | The study of the dynamics of a two-body system in modified gravity constitutes a more complex problem than in Newtonian gravity. Numerical methods are typically needed to solve the equations of geodesics. Despite the complexity of the problem, the study of a two-body system in $f(R)$ gravity leads to a new exciting per... |
2210.04314 | Alexander Zhidenko | R. A. Konoplya, A. Zhidenko | How general is the strong cosmic censorship bound for quasinormal modes? | 8 pages, 2 figures | JCAP 11 (2022) 028 | 10.1088/1475-7516/2022/11/028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hod's proposal claims that the least damped quasinormal mode of a black hole
must have the imaginary part smaller than half of the surface gravity at the
event horizon. The Strong Cosmic Censorship in General Relativity implies that
this bound must be even weaker: half of the surface gravity at the Cauchy
horizon. Th... | [
{
"created": "Sun, 9 Oct 2022 18:21:50 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Nov 2022 00:38:11 GMT",
"version": "v2"
}
] | 2022-11-17 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Hod's proposal claims that the least damped quasinormal mode of a black hole must have the imaginary part smaller than half of the surface gravity at the event horizon. The Strong Cosmic Censorship in General Relativity implies that this bound must be even weaker: half of the surface gravity at the Cauchy horizon. The ... |
2201.07580 | Tiantian Liu | Tian-Tian Liu, He-Xu Zhang, Yu-Hang Feng, Jian-Bo Deng, and Xian-Ru Hu | Double shadow of a 4D Einstein-Gauss-Bonnet black hole and their
connection between with quasinormal modes | null | null | 10.1142/S0217732322501541 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the shadow of a 4D Einstein-Gauss-Bonnet black hole
as photons couple to the Weyl tensor and find that the propagation of light
depends on its polarization which leads to the existence of a double shadow.
Then, we discuss the effect of the coupling parameter $\lambda$, the
polarization of ligh... | [
{
"created": "Wed, 19 Jan 2022 13:02:53 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Sep 2022 09:52:54 GMT",
"version": "v2"
}
] | 2022-11-09 | [
[
"Liu",
"Tian-Tian",
""
],
[
"Zhang",
"He-Xu",
""
],
[
"Feng",
"Yu-Hang",
""
],
[
"Deng",
"Jian-Bo",
""
],
[
"Hu",
"Xian-Ru",
""
]
] | In this paper, we study the shadow of a 4D Einstein-Gauss-Bonnet black hole as photons couple to the Weyl tensor and find that the propagation of light depends on its polarization which leads to the existence of a double shadow. Then, we discuss the effect of the coupling parameter $\lambda$, the polarization of light ... |
1511.00593 | Roman Matsyuk | Roman Matsyuk | Relativistic top in the Ostrohrads'kyj dynamics | in Ukrainian | Collected Physical Papers. Shevchenko Scientific Society, Vol. 8
(2011) 90-105 (ISSN 1563-3969) | null | null | gr-qc math.DG math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A variational equation of the fourth order for the free relativistic top is
developed starting from the Dixon's system of equations for the motion of the
relativistic dipole. The obtained equation is then cast into the homogeneous
space-time Hamiltonian form.
| [
{
"created": "Wed, 21 Oct 2015 14:27:43 GMT",
"version": "v1"
}
] | 2015-11-03 | [
[
"Matsyuk",
"Roman",
""
]
] | A variational equation of the fourth order for the free relativistic top is developed starting from the Dixon's system of equations for the motion of the relativistic dipole. The obtained equation is then cast into the homogeneous space-time Hamiltonian form. |
gr-qc/0211027 | Laszlo A. Gergely | L\'aszl\'o \'A. Gergely and Zolt\'an Keresztes | Gravitational radiation reaction in compact binary systems: Contribution
of the quadrupole-monopole interaction | accepted for publication in Phys. Rev. D | Phys.Rev. D67 (2003) 024020 | 10.1103/PhysRevD.67.024020 | null | gr-qc astro-ph | null | The radiation reaction in compact spinning binaries on eccentric orbits due
to the quadrupole-monopole interaction is studied. This contribution is of
second post-Newtonian order. As result of the precession of spins the magnitude
$L$ of the orbital angular momentum is not conserved. Therefore a proper
characterizati... | [
{
"created": "Thu, 7 Nov 2002 18:57:47 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Nov 2002 21:55:08 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Gergely",
"László Á.",
""
],
[
"Keresztes",
"Zoltán",
""
]
] | The radiation reaction in compact spinning binaries on eccentric orbits due to the quadrupole-monopole interaction is studied. This contribution is of second post-Newtonian order. As result of the precession of spins the magnitude $L$ of the orbital angular momentum is not conserved. Therefore a proper characterization... |
0901.1921 | Catherine Williams | Catherine Williams | Marginally trapped tubes generated from nonlinear scalar field initial
data | 25 pages, 4 figures. Updated to agree with published version; small
but important error in the proof of the main theorem fixed, outline of proof
added in Section 2.5, minor expository changes | Commun.Math.Phys.293:589-610,2010 | 10.1007/s00220-009-0921-2 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the maximal future development of asymptotically flat
spherically symmetric black hole initial data for a self-gravitating nonlinear
scalar field, also called a Higgs field, contains a connected, achronal
marginally trapped tube which is asymptotic to the event horizon of the black
hole, provided the ini... | [
{
"created": "Wed, 14 Jan 2009 18:57:52 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Dec 2009 00:57:58 GMT",
"version": "v2"
}
] | 2009-12-18 | [
[
"Williams",
"Catherine",
""
]
] | We show that the maximal future development of asymptotically flat spherically symmetric black hole initial data for a self-gravitating nonlinear scalar field, also called a Higgs field, contains a connected, achronal marginally trapped tube which is asymptotic to the event horizon of the black hole, provided the initi... |
2110.12761 | Sebastian Murk | Sebastian Murk, Daniel R. Terno | Physical black holes in semiclassical gravity | 16 pages, 1 figure. Contribution to the proceedings of the 16th
Marcel Grossmann meeting (5-10 July 2021) to be published by World
Scientific. Fig.1a has been updated to indicate the quantum ergosphere.
Comments welcome! | The Sixteenth Marcel Grossmann Meeting, pp. 1196-1211 (2023) | 10.1142/9789811269776_0095 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive and critically examine the consequences that follow from the
formation of a regular black or white hole horizon in finite time of a distant
observer. In spherical symmetry, only two distinct classes of solutions to the
semiclassical Einstein equations are self-consistent. Both are required to
describe the f... | [
{
"created": "Mon, 25 Oct 2021 09:40:27 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Feb 2022 12:15:15 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Nov 2022 11:33:03 GMT",
"version": "v3"
}
] | 2023-01-30 | [
[
"Murk",
"Sebastian",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We derive and critically examine the consequences that follow from the formation of a regular black or white hole horizon in finite time of a distant observer. In spherical symmetry, only two distinct classes of solutions to the semiclassical Einstein equations are self-consistent. Both are required to describe the for... |
1308.1344 | Valery Kiselev | V.V.Kiselev | Installing of cosmological constant | 12 pages, jcap style, introduction and motivation completely changed | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An artificial scale of observable cosmological constant is dynamically
related to its natural bare value due to an installation of relevant coherent
state for the inflationary field in a finite volume of early Universe, because
of exponential suppression of probability to find the state with zero number of
quanta. Ho... | [
{
"created": "Mon, 5 Aug 2013 07:08:08 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 2013 04:39:44 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Jan 2014 07:01:24 GMT",
"version": "v3"
}
] | 2014-01-15 | [
[
"Kiselev",
"V. V.",
""
]
] | An artificial scale of observable cosmological constant is dynamically related to its natural bare value due to an installation of relevant coherent state for the inflationary field in a finite volume of early Universe, because of exponential suppression of probability to find the state with zero number of quanta. Homo... |
gr-qc/0008016 | Adam D. Helfer | Adam D. Helfer | Trans-Planckian Modes, Back-Reaction, and the Hawking Process | 7 pages, plain Tex, IOP macros, 1 eps figure | null | null | null | gr-qc | null | Hawking's prediction of black-hole evaporation depends on the application of
known physics to fantastically high energies -- well beyond the Planck scale.
Here, I show that before these extreme regimes are reached, another physical
effect will intervene: the quantum backreaction on the collapsing matter and
its effec... | [
{
"created": "Mon, 7 Aug 2000 21:44:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Helfer",
"Adam D.",
""
]
] | Hawking's prediction of black-hole evaporation depends on the application of known physics to fantastically high energies -- well beyond the Planck scale. Here, I show that before these extreme regimes are reached, another physical effect will intervene: the quantum backreaction on the collapsing matter and its effect ... |
gr-qc/0407062 | Sophonie Blaise Tchapnda | Sophonie Blaise Tchapnda | Structure of solutions near the initial singularity for the
surface-symmetric Einstein-Vlasov system | 17 pages | Class.Quant.Grav.21:5333-5346,2004 | 10.1088/0264-9381/21/23/003 | null | gr-qc | null | Results on the behaviour in the past time direction of cosmological models
with collisionless matter and a cosmological constant $\Lambda$ are presented.
It is shown that under the assumption of non-positive $\Lambda$ and spherical
or plane symmetry the area radius goes to zero at the initial singularity.
Under a sma... | [
{
"created": "Fri, 16 Jul 2004 08:00:07 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Tchapnda",
"Sophonie Blaise",
""
]
] | Results on the behaviour in the past time direction of cosmological models with collisionless matter and a cosmological constant $\Lambda$ are presented. It is shown that under the assumption of non-positive $\Lambda$ and spherical or plane symmetry the area radius goes to zero at the initial singularity. Under a small... |
1704.08023 | Nicolas Sanchis-Gual | Alejandro Escorihuela-Tom\`as, Nicolas Sanchis-Gual, Juan Carlos
Degollado, Jos\'e A. Font | Quasistationary solutions of scalar fields around collapsing
self-interacting boson stars | null | Phys. Rev. D 96, 024015 (2017) | 10.1103/PhysRevD.96.024015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is increasing numerical evidence that scalar fields can form long-lived
quasi-bound states around black holes. Recent perturbative and numerical
relativity calculations have provided further confirmation in a variety of
physical systems, including both static and accreting black holes, and
collapsing fermionic ... | [
{
"created": "Wed, 26 Apr 2017 09:11:49 GMT",
"version": "v1"
}
] | 2017-07-19 | [
[
"Escorihuela-Tomàs",
"Alejandro",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Font",
"José A.",
""
]
] | There is increasing numerical evidence that scalar fields can form long-lived quasi-bound states around black holes. Recent perturbative and numerical relativity calculations have provided further confirmation in a variety of physical systems, including both static and accreting black holes, and collapsing fermionic st... |
1108.0079 | Paulo M. S\'a | Paulo M. S\'a and Alfredo B. Henriques | Gravitational wave generation in loop quantum cosmology | 7 pages, 8 figures, revtex4 | null | 10.1103/PhysRevD.85.024034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the full spectrum, as observed today, of the cosmological
gravitational waves generated within a model based on loop quantum cosmology.
It is assumed that the universe, after the transition to the classical regime,
undergoes a period of inflation driven by a scalar field with a chaotic-type
potential. Ou... | [
{
"created": "Sat, 30 Jul 2011 15:25:05 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Sá",
"Paulo M.",
""
],
[
"Henriques",
"Alfredo B.",
""
]
] | We calculate the full spectrum, as observed today, of the cosmological gravitational waves generated within a model based on loop quantum cosmology. It is assumed that the universe, after the transition to the classical regime, undergoes a period of inflation driven by a scalar field with a chaotic-type potential. Our ... |
gr-qc/9604050 | null | R. Lehoucq (1), M. Lachieze-Rey (1), J.P.Luminet (2) ((1)
CE-Saclay/Service d'Astrophysique, (2) Observatoire de Meudon/DARC) | Cosmic Crystallography | to appear in Astronomy and Astrophysics. Contains 11 pages, 14
Postscript figures, use A&A LaTeX macros package (l-aa.sty). Copies of
figures are available on request | Astron.Astrophys.313:339-346,1996 | null | null | gr-qc astro-ph | null | We assume that the Universe has a non trivial topology whose compact spatial
sections have a volume significantly smaller than the horizon volume. By a
topological lens effect, such a "folded" space configuration generates multiple
images of cosmic sources, e.g. clusters of galaxies. We present a simple and
powerful ... | [
{
"created": "Fri, 26 Apr 1996 09:47:11 GMT",
"version": "v1"
}
] | 2011-05-23 | [
[
"Lehoucq",
"R.",
""
],
[
"Lachieze-Rey",
"M.",
""
],
[
"Luminet",
"J. P.",
""
]
] | We assume that the Universe has a non trivial topology whose compact spatial sections have a volume significantly smaller than the horizon volume. By a topological lens effect, such a "folded" space configuration generates multiple images of cosmic sources, e.g. clusters of galaxies. We present a simple and powerful me... |
gr-qc/0410143 | Mauricio Bellini | Mauricio Bellini (Mar del Plata University & CONICET) | de Sitter inflationary expansion from a noncompact KK theory: a
nonperturbative quantum (scalar) field formalism | final version, to appear in Phys. Lett. B | Phys.Lett. B609 (2005) 187-193 | 10.1016/j.physletb.2005.01.056 | null | gr-qc astro-ph hep-ph hep-th | null | We develop a nonperturbative quantum scalar field formalism from a noncompact
Kaluza-Klein (KK) theory using the induced-matter theory of gravity during
inflation. We study the particular case of a de Sitter expansion for the
universe.
| [
{
"created": "Thu, 28 Oct 2004 18:07:14 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Dec 2004 16:22:28 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jan 2005 20:08:21 GMT",
"version": "v3"
},
{
"created": "Mon, 31 Jan 2005 15:08:48 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Bellini",
"Mauricio",
"",
"Mar del Plata University & CONICET"
]
] | We develop a nonperturbative quantum scalar field formalism from a noncompact Kaluza-Klein (KK) theory using the induced-matter theory of gravity during inflation. We study the particular case of a de Sitter expansion for the universe. |
1208.4385 | Juan Luis P\'erez P\'erez | Juan L. Perez, Ruben Cordero and L. Arturo Urena-Lopez | Cosmological constraints for a two brane-world system with single
equation of state | This work was presented at the VIII Taller of the DGFM, Tuxtla
Gutierrez, Chiapas, Mexico noviembre 22-26, 2010 | AIP Conf. Proc. 1396, 208 (2011) | 10.1063/1.3647549 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the study of two 3-brane system embedded in a 5-dimensional
space-time in which the fifth dimension is compactified on a $S^{1}/Z_{2}$
orbifold. Assuming isotropic, homogeneous, and static branes, it can be shown
that the dynamics of one brane is dominated by the other one when the metric
coefficients have... | [
{
"created": "Tue, 21 Aug 2012 20:56:55 GMT",
"version": "v1"
}
] | 2012-08-23 | [
[
"Perez",
"Juan L.",
""
],
[
"Cordero",
"Ruben",
""
],
[
"Urena-Lopez",
"L. Arturo",
""
]
] | We present the study of two 3-brane system embedded in a 5-dimensional space-time in which the fifth dimension is compactified on a $S^{1}/Z_{2}$ orbifold. Assuming isotropic, homogeneous, and static branes, it can be shown that the dynamics of one brane is dominated by the other one when the metric coefficients have a... |
2210.12525 | Ahmad Sheykhi | Ahmad Sheykhi | Modified cosmology through Barrow entropy | 8 pages, 5 figures, two columns format, Accepted by Phys. Rev. D | Phys. Rev. D 107 (2023) 023505 | 10.1103/PhysRevD.107.023505 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the cosmological consequences of the modified Friedmann
equations when the entropy associated with the apparent horizon, given by
Barrow entropy, $S\sim A^{1+\delta/2}$, where $0\leq\delta\leq1$, represents
the amount of the quantum-gravitational deformation of the horizon. We study
implications of thi... | [
{
"created": "Sat, 22 Oct 2022 18:57:49 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Oct 2022 14:29:47 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Dec 2022 17:32:26 GMT",
"version": "v3"
}
] | 2023-01-18 | [
[
"Sheykhi",
"Ahmad",
""
]
] | We investigate the cosmological consequences of the modified Friedmann equations when the entropy associated with the apparent horizon, given by Barrow entropy, $S\sim A^{1+\delta/2}$, where $0\leq\delta\leq1$, represents the amount of the quantum-gravitational deformation of the horizon. We study implications of this ... |
1907.02974 | Paul Romatschke | Rudolf Baier, Sayantani Lahiri and Paul Romatschke | Ricci cosmology | 13 pages, 3 figures, comments & criticism welcome | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit spatially flat FLRW cosmology in light of recent advances in
standard model relativistic fluid dynamics. Modern fluid dynamics requires the
presence of curvature-matter terms in the energy-momentum tensor for
consistency. These terms are linear in the Ricci scalar and tensor, such that
the corresponding co... | [
{
"created": "Fri, 5 Jul 2019 18:00:01 GMT",
"version": "v1"
}
] | 2019-07-09 | [
[
"Baier",
"Rudolf",
""
],
[
"Lahiri",
"Sayantani",
""
],
[
"Romatschke",
"Paul",
""
]
] | We revisit spatially flat FLRW cosmology in light of recent advances in standard model relativistic fluid dynamics. Modern fluid dynamics requires the presence of curvature-matter terms in the energy-momentum tensor for consistency. These terms are linear in the Ricci scalar and tensor, such that the corresponding cosm... |
gr-qc/0110069 | Tiberiu Harko | M. K. Mak, T. Harko | Bianchi Type I Universes with Causal Bulk Viscous Cosmological Fluid | 11 pages, 5 figures, accepted for publication in International
Journal of Modern Physics D | Int.J.Mod.Phys.D11:447-462,2002 | 10.1142/S0218271802001743 | null | gr-qc | null | We consider the dynamics of a causal bulk viscous cosmological fluid filled
constantly decelerating Bianchi type I space-time. The matter component of the
Universe is assumed to satisfy a linear barotropic equation of state and the
state equation of the small temperature Boltzmann gas. The resulting
cosmological mode... | [
{
"created": "Mon, 15 Oct 2001 05:16:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mak",
"M. K.",
""
],
[
"Harko",
"T.",
""
]
] | We consider the dynamics of a causal bulk viscous cosmological fluid filled constantly decelerating Bianchi type I space-time. The matter component of the Universe is assumed to satisfy a linear barotropic equation of state and the state equation of the small temperature Boltzmann gas. The resulting cosmological models... |
1408.3050 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | A scenario for black hole evaporation on a quantum geometry | 5 pages, RevTex | Proceedings of Science (FFP14) 038 (2015) | null | LSU-REL-081314 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We incorporate elements of the recently discovered exact solutions of the
quantum constraints of loop quantum gravity for vacuum spherically symmetric
space-times into the paradigm of black hole evaporation due to Ashtekar and
Bojowald. The quantization of the area of the surfaces of symmetry of the
solutions implies... | [
{
"created": "Wed, 13 Aug 2014 16:42:54 GMT",
"version": "v1"
}
] | 2015-07-10 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We incorporate elements of the recently discovered exact solutions of the quantum constraints of loop quantum gravity for vacuum spherically symmetric space-times into the paradigm of black hole evaporation due to Ashtekar and Bojowald. The quantization of the area of the surfaces of symmetry of the solutions implies t... |
2402.04460 | Changjun Gao | Changjun Gao | A novel two-field pure K-essence for inflation, dark matter, dark energy
and black holes | 12 pages,18 figures | Universe 2024, 10, 235 | 10.3390/universe10060235 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | K-essence theories are usually studied in the framework of one scalar field
$\phi$. Namely, the Lagrangian of K-essence is the function of scalar field
$\phi$ and its covariant derivative. However, in this paper, we explore a
two-field pure K-essence, i.e. the corresponding Lagrangian is the function of
covariant der... | [
{
"created": "Tue, 6 Feb 2024 23:07:26 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Feb 2024 14:07:17 GMT",
"version": "v2"
}
] | 2024-05-27 | [
[
"Gao",
"Changjun",
""
]
] | K-essence theories are usually studied in the framework of one scalar field $\phi$. Namely, the Lagrangian of K-essence is the function of scalar field $\phi$ and its covariant derivative. However, in this paper, we explore a two-field pure K-essence, i.e. the corresponding Lagrangian is the function of covariant deriv... |
1512.01643 | Ai Viet Nguyen Dr | Ai Viet Nguyen | General Relativity in noncommutative spacetime as a unified framework
for all interactions and the Higgs field | 5 pages | null | null | ITI-VNU-Preprint CS-04/2015 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity in the noncommutative spacetime of ${\cal M}^4 \times Z_2
\times Z_2$ is constructed based on a new type of fermions in addition to the
known chiral quark-leptons. While this theory has a finite physical spectrum,
all the known interactions of Nature and Higgs fields can be derived from it as
compo... | [
{
"created": "Sat, 5 Dec 2015 09:03:14 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Dec 2015 16:04:20 GMT",
"version": "v2"
}
] | 2015-12-14 | [
[
"Nguyen",
"Ai Viet",
""
]
] | General Relativity in the noncommutative spacetime of ${\cal M}^4 \times Z_2 \times Z_2$ is constructed based on a new type of fermions in addition to the known chiral quark-leptons. While this theory has a finite physical spectrum, all the known interactions of Nature and Higgs fields can be derived from it as compone... |
gr-qc/0305002 | Efrain Rojas Marcial | G.F. Torres del Castillo and J.E. Rojas Marcial | Solution of the Helmholtz equation for spin-2 fields | 13 pages, no figures. Paper already published in Revista Mexicana de
Fisica | Rev.Mex.Fis. 39 (1993) 32-46 | null | null | gr-qc | null | The Helmholtz equation for symmetric, traceless, second-rank tensor fields in
three-dimensional flat space is solved in spherical and cylindrical coordinates
by separation of variables making use of the corresponding spin-weighted
harmonics. It is shown that any symmetric, traceless, divergenceless
second-rank tensor... | [
{
"created": "Thu, 1 May 2003 02:02:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"del Castillo",
"G. F. Torres",
""
],
[
"Marcial",
"J. E. Rojas",
""
]
] | The Helmholtz equation for symmetric, traceless, second-rank tensor fields in three-dimensional flat space is solved in spherical and cylindrical coordinates by separation of variables making use of the corresponding spin-weighted harmonics. It is shown that any symmetric, traceless, divergenceless second-rank tensor f... |
1010.3943 | Peter Taylor | Adrian C. Ottewill and Peter Taylor | Renormalized Vacuum Polarization and Stress Tensor on the Horizon of a
Schwarzschild Black Hole Threaded by a Cosmic String | This is an expanded version of a previous submission, we have added
the calculation of the stress tensor. 28 pages, 7 figures | Class.Quant.Grav.28:015007,2011 | 10.1088/0264-9381/28/1/015007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the renormalized vacuum polarization and stress tensor for a
massless, arbitrarily coupled scalar field in the Hartle-Hawking vacuum state
on the horizon of a Schwarzschild black hole threaded by an infinte straight
cosmic string. This calculation relies on a generalized Heine identity for
non-integer Le... | [
{
"created": "Tue, 19 Oct 2010 15:06:30 GMT",
"version": "v1"
}
] | 2011-01-27 | [
[
"Ottewill",
"Adrian C.",
""
],
[
"Taylor",
"Peter",
""
]
] | We calculate the renormalized vacuum polarization and stress tensor for a massless, arbitrarily coupled scalar field in the Hartle-Hawking vacuum state on the horizon of a Schwarzschild black hole threaded by an infinte straight cosmic string. This calculation relies on a generalized Heine identity for non-integer Lege... |
1406.4890 | Sam Dolan Dr | Sam R. Dolan and Patrick Nolan and Adrian C. Ottewill and Niels
Warburton and Barry Wardell | Tidal invariants for compact binaries on quasi-circular orbits | 29 pages, 5 figures, 3 tables. Corrected data in Table I (cf
arXiv:1409.6933) to match published version | Phys. Rev. D 91, 023009 (2015) | 10.1103/PhysRevD.91.023009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the gravitational self-force approach to encompass
`self-interaction' tidal effects for a compact body of mass $\mu$ on a
quasi-circular orbit around a black hole of mass $M \gg \mu$. Specifically, we
define and calculate at $O(\mu)$ (conservative) shifts in the eigenvalues of
the electric- and magnetic-typ... | [
{
"created": "Wed, 18 Jun 2014 21:10:16 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2014 07:39:44 GMT",
"version": "v2"
},
{
"created": "Sun, 25 Jan 2015 20:39:16 GMT",
"version": "v3"
}
] | 2015-01-27 | [
[
"Dolan",
"Sam R.",
""
],
[
"Nolan",
"Patrick",
""
],
[
"Ottewill",
"Adrian C.",
""
],
[
"Warburton",
"Niels",
""
],
[
"Wardell",
"Barry",
""
]
] | We extend the gravitational self-force approach to encompass `self-interaction' tidal effects for a compact body of mass $\mu$ on a quasi-circular orbit around a black hole of mass $M \gg \mu$. Specifically, we define and calculate at $O(\mu)$ (conservative) shifts in the eigenvalues of the electric- and magnetic-type ... |
2308.12810 | Nicol\`o Burzill\`a | Nicol\`o Burzill\`a, Breno L. Giacchini, Tib\'erio de Paula Netto,
Leonardo Modesto | Regular multi-horizon Lee-Wick black holes | 23 pages, 10 figures, 4 tables. V2: references added; matches the
version published in JCAP | JCAP 11 (2023) 067 | 10.1088/1475-7516/2023/11/067 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we carry out a detailed analysis of the static spherically
symmetric solutions of a sixth-derivative Lee-Wick gravity model in the
effective delta source approximation. Previous studies of these solutions have
only considered the particular case in which the real and the imaginary part of
the Lee-Wick m... | [
{
"created": "Thu, 24 Aug 2023 14:13:26 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Nov 2023 21:50:02 GMT",
"version": "v2"
}
] | 2023-11-29 | [
[
"Burzillà",
"Nicolò",
""
],
[
"Giacchini",
"Breno L.",
""
],
[
"Netto",
"Tibério de Paula",
""
],
[
"Modesto",
"Leonardo",
""
]
] | In this paper we carry out a detailed analysis of the static spherically symmetric solutions of a sixth-derivative Lee-Wick gravity model in the effective delta source approximation. Previous studies of these solutions have only considered the particular case in which the real and the imaginary part of the Lee-Wick mas... |
1805.06807 | Philip D. Mannheim | Asanka Amarasinghe, Matthew G. Phelps and Philip D. Mannheim | Cosmological perturbations in conformal gravity II | 39 pages, expanded version. Final version, to appear in Phys. Rev. D | Phys. Rev. D 99, 083527 (2019) | 10.1103/PhysRevD.99.083527 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we continue a study of cosmological perturbations in the
conformal gravity theory. In previous work we had obtained a restricted set of
solutions to the cosmological fluctuation equations, solutions that were
required to be both transverse and synchronous. Here we present the general
solution. We show t... | [
{
"created": "Thu, 17 May 2018 15:03:52 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2019 16:02:34 GMT",
"version": "v2"
}
] | 2019-05-08 | [
[
"Amarasinghe",
"Asanka",
""
],
[
"Phelps",
"Matthew G.",
""
],
[
"Mannheim",
"Philip D.",
""
]
] | In this paper we continue a study of cosmological perturbations in the conformal gravity theory. In previous work we had obtained a restricted set of solutions to the cosmological fluctuation equations, solutions that were required to be both transverse and synchronous. Here we present the general solution. We show tha... |
1001.4545 | Lydia Philpott | Carlo Contaldi, Fay Dowker, Lydia Philpott | Polarization Diffusion from Spacetime Uncertainty | 4 pages, 1 figure | Class.Quant.Grav.27:172001,2010 | 10.1088/0264-9381/27/17/172001 | Imperial/TP/10/LP/1 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model of Lorentz invariant random fluctuations in photon polarization is
presented. The effects are frequency dependent and affect the polarization of
photons as they propagate through space. We test for this effect by confronting
the model with the latest measurements of polarization of Cosmic Microwave
Background... | [
{
"created": "Mon, 25 Jan 2010 21:30:49 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Contaldi",
"Carlo",
""
],
[
"Dowker",
"Fay",
""
],
[
"Philpott",
"Lydia",
""
]
] | A model of Lorentz invariant random fluctuations in photon polarization is presented. The effects are frequency dependent and affect the polarization of photons as they propagate through space. We test for this effect by confronting the model with the latest measurements of polarization of Cosmic Microwave Background (... |
2204.05595 | Sobhan Kazempour | Sobhan Kazempour and Amin Rezaei Akbarieh | Cosmology in Brans-Dicke-de Rham-Gabadadze-Tolley massive gravity | null | Phys. Rev. D 105, 123515 (2022) | 10.1103/PhysRevD.105.123515 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We introduce the Brans-Dick de Rham-Gabadadze-Tolley massive gravity theory
which is the new extension of nonlinear massive gravity. We demonstrate a
detailed study of the cosmological properties of this theory of gravity, and we
show the transformation of the Jordan frame to the Einstein frame. We obtain
the cosmolo... | [
{
"created": "Tue, 12 Apr 2022 07:53:58 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jun 2022 06:19:27 GMT",
"version": "v2"
}
] | 2022-06-17 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Akbarieh",
"Amin Rezaei",
""
]
] | We introduce the Brans-Dick de Rham-Gabadadze-Tolley massive gravity theory which is the new extension of nonlinear massive gravity. We demonstrate a detailed study of the cosmological properties of this theory of gravity, and we show the transformation of the Jordan frame to the Einstein frame. We obtain the cosmologi... |
1303.2548 | Christian R\"oken | Christian R\"oken | Kerr Isolated Horizons in Ashtekar and Ashtekar-Barbero Connection
Variables | 19 pages, 1 figure | null | 10.1007/s10714-017-2251-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ashtekar and Ashtekar-Barbero connection variable formulations of Kerr
isolated horizons are derived. Using a regular Kinnersley tetrad in
horizon-penetrating Kruskal-Szekeres-like coordinates, the spin coefficients of
Kerr geometry are determined by solving the first Maurer-Cartan equation of
structure. Isolated... | [
{
"created": "Mon, 11 Mar 2013 15:39:29 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Jan 2016 14:12:15 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Aug 2016 11:46:31 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Mar 2017 11:18:35 GMT",
"version": "v4"
},
{
"cr... | 2017-08-01 | [
[
"Röken",
"Christian",
""
]
] | The Ashtekar and Ashtekar-Barbero connection variable formulations of Kerr isolated horizons are derived. Using a regular Kinnersley tetrad in horizon-penetrating Kruskal-Szekeres-like coordinates, the spin coefficients of Kerr geometry are determined by solving the first Maurer-Cartan equation of structure. Isolated h... |
gr-qc/0003064 | Laszlo A. Gergely | L\'aszl\'o \'A Gergely | The geometry of the Barbour-Bertotti theories I. The reduction process | 15 pages, to appear in Classical and Quantum Gravity | Class.Quant.Grav.17:1949-1962,2000 | 10.1088/0264-9381/17/9/306 | null | gr-qc | null | The dynamics of $N\geq 3$ interacting particles is investigated in the
non-relativistic context of the Barbour-Bertotti theories. The reduction
process on this constrained system yields a Lagrangian in the form of a
Riemannian line element. The involved metric, degenerate in the flat
configuration space, is the first... | [
{
"created": "Thu, 16 Mar 2000 09:01:41 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Gergely",
"László Á",
""
]
] | The dynamics of $N\geq 3$ interacting particles is investigated in the non-relativistic context of the Barbour-Bertotti theories. The reduction process on this constrained system yields a Lagrangian in the form of a Riemannian line element. The involved metric, degenerate in the flat configuration space, is the first f... |
1311.5423 | Vladimir Kassandrov | Vladimir V. Kassandrov and Joseph A. Rizcallah | Double gauge invariance and covariantly-constant vector fields in Weyl
geometry | 8 pages. Eq.(35) and some comments added. Misprints removed. Adapted
for GERG-format | General Relativity and Gravitation (2014) 46:1772 | 10.1007/S10714-014-1772-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The wave equation and equations of covariantly-constant vector fields (CCVF)
in spaces with Weyl nonmetricity turn out to possess, in addition to the
canonical conformal-gauge, a gauge invariance of another type. On a Minkowski
metric background, the CCVF system alone allows us to pin down the Weyl
4-metricity vector... | [
{
"created": "Wed, 20 Nov 2013 13:06:06 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 19:47:12 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Dec 2014 10:48:36 GMT",
"version": "v3"
}
] | 2019-07-25 | [
[
"Kassandrov",
"Vladimir V.",
""
],
[
"Rizcallah",
"Joseph A.",
""
]
] | The wave equation and equations of covariantly-constant vector fields (CCVF) in spaces with Weyl nonmetricity turn out to possess, in addition to the canonical conformal-gauge, a gauge invariance of another type. On a Minkowski metric background, the CCVF system alone allows us to pin down the Weyl 4-metricity vector, ... |
2207.07608 | Farruh Atamurotov | Ghulam Mustafa, Farruh Atamurotov, Ibrar Hussain, Sanjar Shaymatov,
Ali \"Ovg\"un | Shadows and gravitational weak lensing by the Schwarzschild black hole
in the string cloud background with quintessential field | 12 pages, 9 figures, Accepted for publication in Chinese Physics C | Chinese Phys. C 46 125107 (2022) | 10.1088/1674-1137/ac917f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we observe that in the presence of the string cloud parameter
$a$ and the quintessence parameter $\gamma$, with the equation of state
parameter $\omega_q={-2}/{3}$ the radius of the shadow of the Schwarzschild
black hole increases as compared with the pure Schwarzschild black hole case.
The existence of... | [
{
"created": "Fri, 15 Jul 2022 17:06:56 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2022 15:12:08 GMT",
"version": "v2"
}
] | 2022-12-01 | [
[
"Mustafa",
"Ghulam",
""
],
[
"Atamurotov",
"Farruh",
""
],
[
"Hussain",
"Ibrar",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Övgün",
"Ali",
""
]
] | In this work, we observe that in the presence of the string cloud parameter $a$ and the quintessence parameter $\gamma$, with the equation of state parameter $\omega_q={-2}/{3}$ the radius of the shadow of the Schwarzschild black hole increases as compared with the pure Schwarzschild black hole case. The existence of b... |
2306.16584 | Guilherme Raposo | Artur Alho, Jos\'e Nat\'ario, Paolo Pani, Guilherme Raposo | Scale invariant elastic stars in General Relativity | v2: Published version. 8 pages, 3 figures. Minor changes to the
discussion. Inclusion of Fig.3 and appendix | Phys.Rev.D 109 (2024) 6, 064037 | 10.1103/PhysRevD.109.064037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a model of relativistic elastic stars featuring scale invariance.
This implies a linear mass-radius relation and the absence of a maximum mass.
The most compact spherically symmetric configuration that is radially stable
and satisfies all energy and causality conditions has a slightly smaller radius
than t... | [
{
"created": "Wed, 28 Jun 2023 22:36:19 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Apr 2024 15:33:04 GMT",
"version": "v2"
}
] | 2024-04-05 | [
[
"Alho",
"Artur",
""
],
[
"Natário",
"José",
""
],
[
"Pani",
"Paolo",
""
],
[
"Raposo",
"Guilherme",
""
]
] | We present a model of relativistic elastic stars featuring scale invariance. This implies a linear mass-radius relation and the absence of a maximum mass. The most compact spherically symmetric configuration that is radially stable and satisfies all energy and causality conditions has a slightly smaller radius than the... |
1411.4203 | Luis Granda | L. N. Granda and D. F. Jimenez | Dark Energy from Gauss-Bonnet and non-minimal couplings | 12 pages, 5 figures, to appear in PRD | null | 10.1103/PhysRevD.90.123512 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a scalar-tensor model of dark energy with Gauss-Bonnet and
non-minimal couplings. Exact cosmological solutions were found in absence of
potential, that give equations of state of dark energy consistent with current
observational constraints, but with different asymptotic behaviors depending on
the couplin... | [
{
"created": "Sun, 16 Nov 2014 00:59:46 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Granda",
"L. N.",
""
],
[
"Jimenez",
"D. F.",
""
]
] | We consider a scalar-tensor model of dark energy with Gauss-Bonnet and non-minimal couplings. Exact cosmological solutions were found in absence of potential, that give equations of state of dark energy consistent with current observational constraints, but with different asymptotic behaviors depending on the couplings... |
gr-qc/0310128 | John Quiroga H. | Emilio Elizalde, John Quiroga H | Phantom and quantum matter in an Anti-de Sitter Universe | 10 pages, no figures | Mod.Phys.Lett. A19 (2004) 29-36 | 10.1142/S0217732304012800 | null | gr-qc | null | We consider an Anti-de Sitter Universe filled by quantum CFT with classical
phantom matter and perfect fluid. The model represents the combination of a
trace-anomaly annihilated and a phantom driven Anti-de Sitter Universes. The
influence exerted by the quantum effects and phantom matter on the AdS space is
discussed... | [
{
"created": "Thu, 30 Oct 2003 06:04:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Elizalde",
"Emilio",
""
],
[
"H",
"John Quiroga",
""
]
] | We consider an Anti-de Sitter Universe filled by quantum CFT with classical phantom matter and perfect fluid. The model represents the combination of a trace-anomaly annihilated and a phantom driven Anti-de Sitter Universes. The influence exerted by the quantum effects and phantom matter on the AdS space is discussed. ... |
1312.6762 | Peng Huang | Peng Huang, Yong-Chang Huang, Fang-Fang Yuan | $f(T)$ gravity from holographic Ricci dark energy model with new
boundary conditions | 10 pages | Mod. Phys. Lett. A 28, 1350171 (2013) | 10.1142/S021773231350171X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Commonly used boundary conditions in reconstructing $f(T)$ gravity from
holographic Ricci dark energy model (RDE) are found to cause some problem, we
therefore propose new boundary conditions in this paper. By reconstructing
$f(T)$ gravity from the RDE with these new boundary conditions, we show that
the new ones are... | [
{
"created": "Tue, 24 Dec 2013 05:31:26 GMT",
"version": "v1"
}
] | 2013-12-25 | [
[
"Huang",
"Peng",
""
],
[
"Huang",
"Yong-Chang",
""
],
[
"Yuan",
"Fang-Fang",
""
]
] | Commonly used boundary conditions in reconstructing $f(T)$ gravity from holographic Ricci dark energy model (RDE) are found to cause some problem, we therefore propose new boundary conditions in this paper. By reconstructing $f(T)$ gravity from the RDE with these new boundary conditions, we show that the new ones are b... |
2104.12169 | Dibyendu Panigrahi DP | D. Panigrahi, B. C. Paul and S. Chatterjee | Accelerating Universe in Higher Dimensional Space Time : an alternative
approach | 14 Pages, 11 figures | Eur. Phys. J. Plus 136, 771 (2021) | 10.1140/epjp/s13360-021-01754-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have discussed here a higher dimensional cosmological model and explained
the recent acceleration with a Chaplygin type of gas. Dimensional reduction of
extra space is possible in this case.
Our solutions are general in nature because all the well known results of 4D
Chaplygin driven cosmology are recovered when... | [
{
"created": "Sun, 25 Apr 2021 14:21:35 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Jul 2021 17:37:25 GMT",
"version": "v2"
}
] | 2021-07-27 | [
[
"Panigrahi",
"D.",
""
],
[
"Paul",
"B. C.",
""
],
[
"Chatterjee",
"S.",
""
]
] | We have discussed here a higher dimensional cosmological model and explained the recent acceleration with a Chaplygin type of gas. Dimensional reduction of extra space is possible in this case. Our solutions are general in nature because all the well known results of 4D Chaplygin driven cosmology are recovered when $d ... |
1911.06168 | Anushka Durg Kishore | Anushka Durg, Aryan Bethmangalkar | Charged Embedded Horizons and their Area Evolution | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Embedded Horizon is defined to be a horizon that is in equilibrium with
the exterior of the black hole, that is, isolated on the outside, but
dynamically evolving on the inside, analogous to the inner and outer event
horizons of the Reissner-Nordstrom black hole. This is shown as the result of
charge variance on ... | [
{
"created": "Thu, 14 Nov 2019 15:13:14 GMT",
"version": "v1"
}
] | 2019-11-15 | [
[
"Durg",
"Anushka",
""
],
[
"Bethmangalkar",
"Aryan",
""
]
] | The Embedded Horizon is defined to be a horizon that is in equilibrium with the exterior of the black hole, that is, isolated on the outside, but dynamically evolving on the inside, analogous to the inner and outer event horizons of the Reissner-Nordstrom black hole. This is shown as the result of charge variance on th... |
gr-qc/0401124 | Yutaka Hosotani | Yutaka Hosotani and Ramin G. Daghigh | False Vacuum Lumps with the Fermionic Core | 3 pages, 4 figures. To appear in the proceedings of the Tenth Marcel
Grossmann Meeting on General Relativity | null | 10.1142/9789812704030_0247 | OU-HET 465/2004 | gr-qc | null | Stable gravitating lumps with a false vacuum core surrounded by the true
vacuum in a scalar field potential exist in the presence of fermions at the
core. These objects may exist in the universe at various scales.
| [
{
"created": "Fri, 30 Jan 2004 05:21:28 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Hosotani",
"Yutaka",
""
],
[
"Daghigh",
"Ramin G.",
""
]
] | Stable gravitating lumps with a false vacuum core surrounded by the true vacuum in a scalar field potential exist in the presence of fermions at the core. These objects may exist in the universe at various scales. |
0806.3300 | Sheng-Jui Chen | Sheng-Jui Chen and Sheau-Shi Pan | Nanonewton force generation and detection based on a sensitive torsion
pendulum | This work has been presented on Conference on Precision
Electromagnetic Measurements, 8-13 June 2008, Broomfield, Colorado | IEEE Transactions on Instrumentation and Measurement, April 2009,
Vol. 58, Issue 4. | 10.1109/TIM.2008.2011096 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we introduce the experiment based on a sensitive torsion
pendulum for measuring and calibrating small forces at nanonewton scale. The
force standard for calibration is the universal gravitation between four masses
separated by known distances. It is realized by two test masses suspended as
the part of ... | [
{
"created": "Fri, 20 Jun 2008 00:16:44 GMT",
"version": "v1"
}
] | 2009-04-28 | [
[
"Chen",
"Sheng-Jui",
""
],
[
"Pan",
"Sheau-Shi",
""
]
] | In this paper, we introduce the experiment based on a sensitive torsion pendulum for measuring and calibrating small forces at nanonewton scale. The force standard for calibration is the universal gravitation between four masses separated by known distances. It is realized by two test masses suspended as the part of to... |
2108.02960 | Elena Gaburro | Elena Gaburro and Manuel J. Castro and Michael Dumbser | A well balanced finite volume scheme for general relativity | null | null | null | null | gr-qc cs.NA math.NA | http://creativecommons.org/licenses/by/4.0/ | In this work we present a novel second order accurate well balanced (WB)
finite volume (FV) scheme for the solution of the general relativistic
magnetohydrodynamics (GRMHD) equations and the first order CCZ4 formulation
(FO-CCZ4) of the Einstein field equations of general relativity, as well as the
fully coupled FO-C... | [
{
"created": "Fri, 6 Aug 2021 06:43:13 GMT",
"version": "v1"
}
] | 2021-08-09 | [
[
"Gaburro",
"Elena",
""
],
[
"Castro",
"Manuel J.",
""
],
[
"Dumbser",
"Michael",
""
]
] | In this work we present a novel second order accurate well balanced (WB) finite volume (FV) scheme for the solution of the general relativistic magnetohydrodynamics (GRMHD) equations and the first order CCZ4 formulation (FO-CCZ4) of the Einstein field equations of general relativity, as well as the fully coupled FO-CCZ... |
gr-qc/0410026 | Giovanni Montani | Giovanni Corvino and Giovanni Montani | Dark Matter Prediction from Canonical Quantum Gravity with Frame Fixing | 5 pages, to appear on Modern Physics Letters A | Mod.Phys.Lett. A19 (2004) 2777-2784 | 10.1142/S0217732304015920 | null | gr-qc | null | We show how, in canonical quantum cosmology, the frame fixing induces a new
energy density contribution having features compatible with the (actual) cold
dark matter component of the Universe. First we quantize the closed
Friedmann-Robertson-Walker (FRW) model in a sinchronous reference and determine
the spectrum of ... | [
{
"created": "Wed, 6 Oct 2004 09:13:04 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Corvino",
"Giovanni",
""
],
[
"Montani",
"Giovanni",
""
]
] | We show how, in canonical quantum cosmology, the frame fixing induces a new energy density contribution having features compatible with the (actual) cold dark matter component of the Universe. First we quantize the closed Friedmann-Robertson-Walker (FRW) model in a sinchronous reference and determine the spectrum of th... |
gr-qc/0208082 | Alan D. Rendall | Alan D. Rendall | The Einstein-Vlasov system | Lecture notes from Cargese workshop | null | null | AEI-2002-063 | gr-qc | null | Rigorous results on solutions of the Einstein-Vlasov system are surveyed.
After an introduction to this system of equations and the reasons for studying
it, a general discussion of various classes of solutions is given. The emphasis
is on presenting important conceptual ideas, while avoiding entering into
technical d... | [
{
"created": "Tue, 27 Aug 2002 08:20:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rendall",
"Alan D.",
""
]
] | Rigorous results on solutions of the Einstein-Vlasov system are surveyed. After an introduction to this system of equations and the reasons for studying it, a general discussion of various classes of solutions is given. The emphasis is on presenting important conceptual ideas, while avoiding entering into technical det... |
2002.09226 | Frederic H. Vincent | F. H. Vincent, M. Wielgus, M. A. Abramowicz, E. Gourgoulhon, J.-P.
Lasota, T. Paumard, G. Perrin | Geometric modeling of M87* as a Kerr black hole or a non-Kerr compact
object | 22 pages, 21 figures, accepted by A&A - see new Fig. 5 | A&A 646, A37 (2021) | 10.1051/0004-6361/202037787 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Context. The Event Horizon Telescope (EHT) collaboration recently obtained
first images of the surroundings of the supermassive compact object M87* at the
center of the galaxy M87. Aims. We want to develop a simple analytic disk model
for the accretion flow of M87*. Compared to general-relativistic
magnetohydrodynami... | [
{
"created": "Fri, 21 Feb 2020 11:05:32 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2020 08:19:53 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Vincent",
"F. H.",
""
],
[
"Wielgus",
"M.",
""
],
[
"Abramowicz",
"M. A.",
""
],
[
"Gourgoulhon",
"E.",
""
],
[
"Lasota",
"J. -P.",
""
],
[
"Paumard",
"T.",
""
],
[
"Perrin",
"G.",
""
]
] | Context. The Event Horizon Telescope (EHT) collaboration recently obtained first images of the surroundings of the supermassive compact object M87* at the center of the galaxy M87. Aims. We want to develop a simple analytic disk model for the accretion flow of M87*. Compared to general-relativistic magnetohydrodynamic ... |
1505.04649 | Giulia Gubitosi | Giovanni Amelino-Camelia, Michele Arzano, Giulia Gubitosi, Joao
Magueijo | Gravity as the breakdown of conformal invariance | Awarded Second Prize in the Gravity Research Foundation 2015 Awards
for Essays on Gravitation | null | 10.1142/S0218271815430026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that at the beginning of the universe gravity existed in a limbo
either because it was switched off or because it was only conformally coupled
to all particles. This picture can be reverse-engineered from the requirement
that the cosmological perturbations be (nearly) scale-invariant without the
need for i... | [
{
"created": "Mon, 18 May 2015 14:10:51 GMT",
"version": "v1"
}
] | 2015-12-09 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Arzano",
"Michele",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
]
] | We propose that at the beginning of the universe gravity existed in a limbo either because it was switched off or because it was only conformally coupled to all particles. This picture can be reverse-engineered from the requirement that the cosmological perturbations be (nearly) scale-invariant without the need for inf... |
gr-qc/9809061 | Jose Geraldo Pereira | R. Aldrovandi and J. G. Pereira | A Second Poincare' Group | RevTeX, 7 pages, no figures, contribution to "Topics in Theoretical
Physics II: Festschrift for A. H. Zimerman" | null | null | IFT-P.046/98 | gr-qc hep-th | null | Solutions of the sourceless Einstein's equation with weak and strong
cosmological constants are discussed by using In\"on\"u-Wigner contractions of
the de Sitter groups and spaces. The more usual case corresponds to a weak
cosmological-constant limit, in which the de Sitter groups are contracted to
the Poincar\'e gro... | [
{
"created": "Mon, 21 Sep 1998 22:05:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Aldrovandi",
"R.",
""
],
[
"Pereira",
"J. G.",
""
]
] | Solutions of the sourceless Einstein's equation with weak and strong cosmological constants are discussed by using In\"on\"u-Wigner contractions of the de Sitter groups and spaces. The more usual case corresponds to a weak cosmological-constant limit, in which the de Sitter groups are contracted to the Poincar\'e group... |
1812.11678 | Jing-Bo Wang | Jingbo Wang | Microscopic states of Kerr black holes from boundary-bulk correspondence | 13 pages, comments are welcome;v2, major changes, the results
unchanged;v3, bring in the interacting scalar field which has a special form
of hamiltonian for Kerr black holle | Chinese Physics C Vol. 45, No. 1 (2021) | 10.1088/1674-1137/abc247 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was claimed by the author that black holes can be considered as
topological insulators. They both have boundary modes and those boundary modes
can be described by an effective BF theory. In this paper, we analyze the
boundary modes on the horizon of black holes with the methods developed for
topological insulator.... | [
{
"created": "Mon, 31 Dec 2018 02:52:32 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2019 01:07:17 GMT",
"version": "v2"
},
{
"created": "Sun, 5 Jan 2020 04:51:34 GMT",
"version": "v3"
}
] | 2020-11-12 | [
[
"Wang",
"Jingbo",
""
]
] | It was claimed by the author that black holes can be considered as topological insulators. They both have boundary modes and those boundary modes can be described by an effective BF theory. In this paper, we analyze the boundary modes on the horizon of black holes with the methods developed for topological insulator. F... |
gr-qc/9611060 | Marc Israelit | Mark Israelit (Dept. of Physics, University of Konstanz, Germany; on
leave from: Dept. of Physics, University of Haifa-Oranim, Israel) | Magnetic Monopoles and Massive Photons in a Weyl-Type Electrodynamics | 12 pages, LaTex (no figures) | Gen.Rel.Grav.29:1597-1614,1997 | 10.1023/A:1018838530937 | null | gr-qc | null | In a previous work the Weyl-Dirac framework was generalized in order to
obtain a geometrically based general relativistic theory, possessing intrinsic
electric and magnetic currents and admitting massive photons. Some physical
phenomena in that framework are considered. So it is shown that massive photons
may exist o... | [
{
"created": "Mon, 25 Nov 1996 16:21:54 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Israelit",
"Mark",
"",
"Dept. of Physics, University of Konstanz, Germany; on\n leave from: Dept. of Physics, University of Haifa-Oranim, Israel"
]
] | In a previous work the Weyl-Dirac framework was generalized in order to obtain a geometrically based general relativistic theory, possessing intrinsic electric and magnetic currents and admitting massive photons. Some physical phenomena in that framework are considered. So it is shown that massive photons may exist onl... |
0712.1028 | Nicolas Yunes | Nicolas Yunes, Carlos F. Sopuerta | Perturbations of Schwarzschild Black Holes in Chern-Simons Modified
Gravity | 14 pages, submitted to PRD | Phys.Rev.D77:064007,2008 | 10.1103/PhysRevD.77.064007 | IGC-07/12-3 | gr-qc astro-ph hep-th | null | We study perturbations of a Schwarzschild black hole in Chern-Simons modified
gravity. We begin by showing that Birkhoff's theorem holds for a wide family of
Chern-Simons coupling functions, a scalar field present in the theory that
controls the strength of the Chern-Simons correction to the Einstein-Hilbert
action. ... | [
{
"created": "Thu, 6 Dec 2007 19:57:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Yunes",
"Nicolas",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | We study perturbations of a Schwarzschild black hole in Chern-Simons modified gravity. We begin by showing that Birkhoff's theorem holds for a wide family of Chern-Simons coupling functions, a scalar field present in the theory that controls the strength of the Chern-Simons correction to the Einstein-Hilbert action. Af... |
1703.09263 | Mariam Bouhmadi-Lopez | Imanol Albarran, Mariam Bouhmadi-L\'opez, Che-Yu Chen, Pisin Chen | Doomsdays in a modified theory of gravity: A classical and a quantum
approach | 6 pages. A more careful and detailed analysis of the classical and
quantum Hamiltonian included. Physical results unchanged. Version accepted in
PLB | Physics Letters B 772C (2017) pp. 814-818 | 10.1016/j.physletb.2017.07.053 | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By far cosmology is one of the most exciting subject to study, even more so
with the current bulk of observations we have at hand. These observations might
indicate different kinds of doomsdays, if dark energy follows certain patterns.
Two of these doomsdays are the Little Rip (LR) and Little Sibling of the Big
Rip (... | [
{
"created": "Mon, 27 Mar 2017 18:51:03 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jul 2017 11:02:43 GMT",
"version": "v2"
}
] | 2017-08-08 | [
[
"Albarran",
"Imanol",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | By far cosmology is one of the most exciting subject to study, even more so with the current bulk of observations we have at hand. These observations might indicate different kinds of doomsdays, if dark energy follows certain patterns. Two of these doomsdays are the Little Rip (LR) and Little Sibling of the Big Rip (LS... |
1509.08422 | Hamed Pejhan | Hamed Pejhan and Surena Rahbardehghan | Covariant and infrared-free graviton two-point function in de Sitter
spacetime | 18 pages, published version | Phys. Rev. D 93, 044016 (2016) | 10.1103/PhysRevD.93.044016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the two-point function of linearized gravitons on de Sitter
(dS) space is presented. Technically, respecting the dS ambient space notation,
the field equation is given by the coordinate-independent Casimir operators of
the de Sitter group. Analogous to the quantization of the electromagnetic field
in M... | [
{
"created": "Mon, 28 Sep 2015 18:29:33 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Oct 2015 18:57:13 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Jan 2016 11:11:29 GMT",
"version": "v3"
},
{
"created": "Tue, 2 Feb 2016 11:09:20 GMT",
"version": "v4"
}
] | 2018-08-16 | [
[
"Pejhan",
"Hamed",
""
],
[
"Rahbardehghan",
"Surena",
""
]
] | In this paper, the two-point function of linearized gravitons on de Sitter (dS) space is presented. Technically, respecting the dS ambient space notation, the field equation is given by the coordinate-independent Casimir operators of the de Sitter group. Analogous to the quantization of the electromagnetic field in Min... |
gr-qc/9911070 | Kengo Maeda | Kengo Maeda, Takashi Torii, and Makoto Narita | Violation of the cosmic no hair conjecture in Einstein-Maxwell-dilaton
system | 9 pages, REVtex, 5 figures, to appear in Phys. Rev. D | Phys.Rev. D61 (2000) 064012 | 10.1103/PhysRevD.61.064012 | WU-AP/86/99 | gr-qc | null | The cosmic no hair conjecture is tested in the spherically symmetric
Einstein-Maxwell-dilaton~(EMD) system with a positive cosmological constant
$\Lambda$. Firstly, we analytically show that once gravitational collapse
occurs in the massless dilaton case, the system of field equations breaks down
inevitably in outer ... | [
{
"created": "Fri, 19 Nov 1999 05:26:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Maeda",
"Kengo",
""
],
[
"Torii",
"Takashi",
""
],
[
"Narita",
"Makoto",
""
]
] | The cosmic no hair conjecture is tested in the spherically symmetric Einstein-Maxwell-dilaton~(EMD) system with a positive cosmological constant $\Lambda$. Firstly, we analytically show that once gravitational collapse occurs in the massless dilaton case, the system of field equations breaks down inevitably in outer co... |
1412.6057 | Sergei Alexandrov | Sergei Alexandrov and Simone Speziale | First order gravity on the light front | 35 pages, 1 figure; minor corrections, added references | Phys. Rev. D 91, 064043 (2015) | 10.1103/PhysRevD.91.064043 | L2C:14-216 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the canonical structure of the real first order formulation of
general relativity on a null foliation. We use a tetrad decomposition which
allows to elegantly encode the nature of the foliation in the norm of a vector
in the fibre bundle. The resulting constraint structure shows some
peculiarities. In partic... | [
{
"created": "Thu, 18 Dec 2014 20:33:10 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2015 13:13:18 GMT",
"version": "v2"
}
] | 2015-03-25 | [
[
"Alexandrov",
"Sergei",
""
],
[
"Speziale",
"Simone",
""
]
] | We study the canonical structure of the real first order formulation of general relativity on a null foliation. We use a tetrad decomposition which allows to elegantly encode the nature of the foliation in the norm of a vector in the fibre bundle. The resulting constraint structure shows some peculiarities. In particul... |
gr-qc/0410144 | Rituparno Goswami | Rituparno Goswami and Pankaj S Joshi | Naked Singularity formation in scalar field collapse | 4 Pages, Letter, Revtex4, 2 figures | null | null | null | gr-qc hep-th | null | We construct here a class of collapsing scalar field models with a non-zero
potential, which result in a naked singularity as collapse end state. The weak
energy condition is satisfied by the collapsing configuration. It is shown that
physically it is the rate of collapse that governs either the black hole or
naked s... | [
{
"created": "Thu, 28 Oct 2004 19:03:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Goswami",
"Rituparno",
""
],
[
"Joshi",
"Pankaj S",
""
]
] | We construct here a class of collapsing scalar field models with a non-zero potential, which result in a naked singularity as collapse end state. The weak energy condition is satisfied by the collapsing configuration. It is shown that physically it is the rate of collapse that governs either the black hole or naked sin... |
1503.01272 | Donato Bini | Donato Bini and Thibault Damour | Analytic determination of high-order post-Newtonian self-force
contributions to gravitational spin precession | 10 pages, revtex macros used | Phys. Rev. D 91, 064064 (2015) | 10.1103/PhysRevD.91.064064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Continuing our analytic computation of the first-order self-force
contribution to the "geodetic" spin precession frequency of a small spinning
body orbiting a large (non-spinning) body we provide the exact expressions of
the tenth and tenth-and-a-half post-Newtonian terms. We also introduce a new
approach to the anal... | [
{
"created": "Wed, 4 Mar 2015 10:42:07 GMT",
"version": "v1"
}
] | 2015-04-01 | [
[
"Bini",
"Donato",
""
],
[
"Damour",
"Thibault",
""
]
] | Continuing our analytic computation of the first-order self-force contribution to the "geodetic" spin precession frequency of a small spinning body orbiting a large (non-spinning) body we provide the exact expressions of the tenth and tenth-and-a-half post-Newtonian terms. We also introduce a new approach to the analyt... |
gr-qc/9507048 | Amos Ouri | Amos Ori | Radiative Evolution of Orbits Around a Kerr Black Hole | 6 pages, Plain TeX, Published in Phys. Lett. A. 202, 347 (3 July
1995) | Phys.Lett. A202 (1995) 347-351 | 10.1016/0375-9601(95)00333-X | Technion-PH-95-19 | gr-qc | null | We propose a simple approach for the radiative evolution of generic orbits
around a Kerr black hole. For a scalar-field, we recover the standard results
for the evolution of the energy $E$ and the azimuthal angular momentum $L_z$ .
In addition, our method provides a closed expression for the evolution of the
Carter c... | [
{
"created": "Tue, 25 Jul 1995 12:24:04 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Ori",
"Amos",
""
]
] | We propose a simple approach for the radiative evolution of generic orbits around a Kerr black hole. For a scalar-field, we recover the standard results for the evolution of the energy $E$ and the azimuthal angular momentum $L_z$ . In addition, our method provides a closed expression for the evolution of the Carter con... |
gr-qc/0610054 | Jean-Pierre Gazeau | Jean-Pierre Gazeau (APC), Mario Novello (CBPF) | The nature of $\Lambda$ and the mass of the graviton: A critical view | 39 pages | International Journal of Modern Physics A 26 (2011) 3697-3720 | 10.1142/S0217751X11054176 | null | gr-qc | null | The existence of a non-zero cosmological constant $\Lambda$ gives rise to
controversial interpretations. Is $\Lambda$ a universal constant fixing the
geometry of an empty universe, as fundamental as the Planck constant or the
speed of light in the vacuum? Its natural place is then on the left-hand side
of the Einstei... | [
{
"created": "Wed, 11 Oct 2006 12:27:28 GMT",
"version": "v1"
}
] | 2012-09-25 | [
[
"Gazeau",
"Jean-Pierre",
"",
"APC"
],
[
"Novello",
"Mario",
"",
"CBPF"
]
] | The existence of a non-zero cosmological constant $\Lambda$ gives rise to controversial interpretations. Is $\Lambda$ a universal constant fixing the geometry of an empty universe, as fundamental as the Planck constant or the speed of light in the vacuum? Its natural place is then on the left-hand side of the Einstein ... |
2310.19184 | Todd Oliynyk | Todd A. Oliynyk | On the fractional density gradient blow-up conjecture of Rendall | Typos fixed and an error in the asymptotic behaviour of the density
corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On exponentially expanding Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW)
spacetimes, there is a distinguished family of spatially homogeneous and
isotropic solutions to the relativistic Euler equations with a linear equation
of state of the form $p=\sigma \rho$, where $\sigma \in [0,1]$ is the square of
the sound sp... | [
{
"created": "Sun, 29 Oct 2023 22:58:44 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2024 23:59:10 GMT",
"version": "v2"
}
] | 2024-07-25 | [
[
"Oliynyk",
"Todd A.",
""
]
] | On exponentially expanding Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) spacetimes, there is a distinguished family of spatially homogeneous and isotropic solutions to the relativistic Euler equations with a linear equation of state of the form $p=\sigma \rho$, where $\sigma \in [0,1]$ is the square of the sound spee... |
1110.5487 | Farhad Darabi | F. Darabi | Classical and quantum wormholes in a 5D compact Kaluza-Klein theory | 10 pages, Major revision | Can. J. Phys. 90: 461-465 (2012) | 10.1139/p2012-040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the classical and quantum Euclidean wormholes for an empty (4+1)
dimensional Kaluza-Klein universe with a positive cosmological constant and a
spatially flat Robertson-Walker type metric. It is shown that classical
wormholes do not exist neither for the spacetime sector nor the extra
dimensional sector of th... | [
{
"created": "Tue, 25 Oct 2011 12:54:36 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Jun 2012 12:11:25 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Darabi",
"F.",
""
]
] | We study the classical and quantum Euclidean wormholes for an empty (4+1) dimensional Kaluza-Klein universe with a positive cosmological constant and a spatially flat Robertson-Walker type metric. It is shown that classical wormholes do not exist neither for the spacetime sector nor the extra dimensional sector of this... |
1506.09133 | Antoine Folacci | Yves Decanini, Antoine Folacci and Mohamed Ould El Hadj | Waveforms produced by a scalar point particle plunging into a
Schwarzschild black hole: Excitation of quasinormal modes and quasibound
states | v2 : Minor changes to match the published version | Phys. Rev. D 92, 024057 (2015) | 10.1103/PhysRevD.92.024057 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the possibility of testing massive gravity in the context of black hole
physics in mind, we consider the radiation produced by a particle plunging from
slightly below the innermost stable circular orbit into a Schwarzschild black
hole. In order to circumvent the difficulties associated with black hole
perturbati... | [
{
"created": "Tue, 30 Jun 2015 16:01:01 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jul 2015 10:34:34 GMT",
"version": "v2"
}
] | 2015-08-05 | [
[
"Decanini",
"Yves",
""
],
[
"Folacci",
"Antoine",
""
],
[
"Hadj",
"Mohamed Ould El",
""
]
] | With the possibility of testing massive gravity in the context of black hole physics in mind, we consider the radiation produced by a particle plunging from slightly below the innermost stable circular orbit into a Schwarzschild black hole. In order to circumvent the difficulties associated with black hole perturbation... |
1503.02545 | Christos Charmousis | Eugeny Babichev, Christos Charmousis and Mokhtar Hassaine | Charged Galileon black holes | Regular article, no figures | null | 10.1088/1475-7516/2015/05/031 | LPT-Orsay-15-20 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an Abelian gauge field coupled to a particular truncation of
Horndeski theory. The Galileon field has translation symmetry and couples non
minimally both to the metric and the gauge field. When the gauge-scalar
coupling is zero the gauge field reduces to a standard Maxwell field. By taking
into account th... | [
{
"created": "Mon, 9 Mar 2015 16:17:34 GMT",
"version": "v1"
}
] | 2015-07-20 | [
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Hassaine",
"Mokhtar",
""
]
] | We consider an Abelian gauge field coupled to a particular truncation of Horndeski theory. The Galileon field has translation symmetry and couples non minimally both to the metric and the gauge field. When the gauge-scalar coupling is zero the gauge field reduces to a standard Maxwell field. By taking into account the ... |
2104.03422 | Priti Gupta | Priti Gupta, B\'eatrice Bonga, Alvin J. K. Chua, and Takahiro Tanaka | Importance of tidal resonances in extreme-mass-ratio inspirals | 19 pages, 14 figures | Phys. Rev. D 104, 044056 (2021) | 10.1103/PhysRevD.104.044056 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme mass ratio inspirals (EMRIs) will be important sources for future
space-based gravitational-wave detectors. In recent work, tidal resonances in
binary orbital evolution induced by the tidal field of nearby stars or black
holes have been identified as being potentially significant in the context of
extreme mas... | [
{
"created": "Wed, 7 Apr 2021 22:37:42 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jul 2021 01:06:25 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"Gupta",
"Priti",
""
],
[
"Bonga",
"Béatrice",
""
],
[
"Chua",
"Alvin J. K.",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | Extreme mass ratio inspirals (EMRIs) will be important sources for future space-based gravitational-wave detectors. In recent work, tidal resonances in binary orbital evolution induced by the tidal field of nearby stars or black holes have been identified as being potentially significant in the context of extreme mass-... |
1503.07365 | Paolo Pani | Paolo Pani, Leonardo Gualtieri, Andrea Maselli, Valeria Ferrari | Tidal deformations of a spinning compact object | 27 pages, 1 figure, 6 appendices; v2: improvements and
clarifications, version to appear in PRD | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deformability of a compact object induced by a perturbing tidal field is
encoded in the tidal Love numbers, which depend sensibly on the object's
internal structure. These numbers are known only for static,
spherically-symmetric objects. As a first step to compute the tidal Love
numbers of a spinning compact star... | [
{
"created": "Wed, 25 Mar 2015 13:00:16 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jun 2015 12:59:54 GMT",
"version": "v2"
}
] | 2015-07-01 | [
[
"Pani",
"Paolo",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Ferrari",
"Valeria",
""
]
] | The deformability of a compact object induced by a perturbing tidal field is encoded in the tidal Love numbers, which depend sensibly on the object's internal structure. These numbers are known only for static, spherically-symmetric objects. As a first step to compute the tidal Love numbers of a spinning compact star, ... |
0901.2306 | Pac\^ome Delva | L. Bergamin, P. Delva and A. Hees | Vibrating systems in Schwarzschild spacetime: towards new experiments in
gravitation? | 11 pages, 12 figures; major revision | Class.Quant.Grav.26:185006,2009 | 10.1088/0264-9381/26/18/185006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper the effects of vibrations at high frequencies onto a freely
falling two-body system in Schwarzschild spacetime are investigated. As
reference motion of the same system without vibrations a circular orbit around
the central body is considered. The vibrations induce a perturbation on this
motion, whose pe... | [
{
"created": "Thu, 15 Jan 2009 16:37:18 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jan 2009 09:41:28 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Apr 2009 08:41:20 GMT",
"version": "v3"
}
] | 2010-12-02 | [
[
"Bergamin",
"L.",
""
],
[
"Delva",
"P.",
""
],
[
"Hees",
"A.",
""
]
] | In this paper the effects of vibrations at high frequencies onto a freely falling two-body system in Schwarzschild spacetime are investigated. As reference motion of the same system without vibrations a circular orbit around the central body is considered. The vibrations induce a perturbation on this motion, whose peri... |
gr-qc/9611033 | Joan Centrella | Janet L. Houser and Joan M. Centrella (Drexel University) | Gravitational Radiation from Rotational Instabilities in Compact Stellar
Cores with Stiff Equations of State | 39 pages, uses Latex 2.09. To be published in the Dec. 15, 1996 issue
of Physical Review D. 21 figures (bitmapped). Originals available in
compressed Postscript format at ftp://zonker.drexel.edu/papers/bars/ | Phys.Rev.D54:7278-7297,1996 | 10.1103/PhysRevD.54.7278 | null | gr-qc astro-ph | null | We carry out 3-D numerical simulations of the dynamical instability in
rapidly rotating stars initially modeled as polytropes with n = 1.5, 1.0, and
0.5. The calculations are done with a SPH code using Newtonian gravity, and the
gravitational radiation is calculated in the quadrupole limit. All models
develop the glo... | [
{
"created": "Tue, 12 Nov 1996 21:41:19 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Houser",
"Janet L.",
"",
"Drexel University"
],
[
"Centrella",
"Joan M.",
"",
"Drexel University"
]
] | We carry out 3-D numerical simulations of the dynamical instability in rapidly rotating stars initially modeled as polytropes with n = 1.5, 1.0, and 0.5. The calculations are done with a SPH code using Newtonian gravity, and the gravitational radiation is calculated in the quadrupole limit. All models develop the globa... |
1511.00102 | Sulona Kandhai Miss | Alvaro de la Cruz-Dombriz (ACGC, U. of Cape Town), Peter K. S. Dunsby
(ACGC, U. of Cape Town and SAAO), Sulona Kandhai (ACGC, U.of Cape Town),
Diego Saez-Gomez (U. of Lisbon) | Theoretical and observational constraints of viable f(R) theories of
gravity | 12 pages, 5 figures, 1 table, two-column format | Phys. Rev. D 93, 084016 (2016) | 10.1103/PhysRevD.93.084016 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity has attracted much attention over the last few years and
remains a potential candidate for dark energy. In particular, the so-called
viable f(R) gravity theories, which are able to both recover General Relativity
(GR) and produce late-time cosmic acceleration, have been widely studied in
recent liter... | [
{
"created": "Sat, 31 Oct 2015 09:11:24 GMT",
"version": "v1"
}
] | 2016-04-20 | [
[
"de la Cruz-Dombriz",
"Alvaro",
"",
"ACGC, U. of Cape Town"
],
[
"Dunsby",
"Peter K. S.",
"",
"ACGC, U. of Cape Town and SAAO"
],
[
"Kandhai",
"Sulona",
"",
"ACGC, U.of Cape Town"
],
[
"Saez-Gomez",
"Diego",
"",
"U. of Lisbon"
]
] | Modified gravity has attracted much attention over the last few years and remains a potential candidate for dark energy. In particular, the so-called viable f(R) gravity theories, which are able to both recover General Relativity (GR) and produce late-time cosmic acceleration, have been widely studied in recent literat... |
1608.02592 | Alan Kostelecky | Alan Kostelecky, Adrian C. Melissinos, Matthew Mewes | Searching for photon-sector Lorentz violation using gravitational-wave
detectors | 8 pages, published in Physics Letters B | Phys.Lett.B761:1-7,2016 | 10.1016/j.physletb.2016.08.001 | IUHET 612, July 2016 | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the prospects for using interferometers in gravitational-wave
detectors as tools to search for photon-sector violations of Lorentz symmetry.
Existing interferometers are shown to be exquisitely sensitive to tiny changes
in the effective refractive index of light occurring at frequencies around and
below the ... | [
{
"created": "Mon, 8 Aug 2016 20:00:05 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Kostelecky",
"Alan",
""
],
[
"Melissinos",
"Adrian C.",
""
],
[
"Mewes",
"Matthew",
""
]
] | We study the prospects for using interferometers in gravitational-wave detectors as tools to search for photon-sector violations of Lorentz symmetry. Existing interferometers are shown to be exquisitely sensitive to tiny changes in the effective refractive index of light occurring at frequencies around and below the mi... |
2107.12865 | Edgar Gasperin | Edgar Gasperin and Jos\'e Luis Jaramillo | Energy scales and black hole pseudospectra: the structural role of the
scalar product | 60 pages. 5 figures. New title. Refined and extended discussion | null | 10.1088/1361-6382/ac5054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A pseudospectrum analysis has recently provided evidence of a potential
generic instability of black hole (BH) quasinormal mode (QNM) overtones under
high-frequency perturbations. Such instability analysis depends on the
assessment of the size of perturbations. This is encoded in the scalar product
and its choice is ... | [
{
"created": "Tue, 27 Jul 2021 14:59:54 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Oct 2021 17:30:06 GMT",
"version": "v2"
}
] | 2022-06-08 | [
[
"Gasperin",
"Edgar",
""
],
[
"Jaramillo",
"José Luis",
""
]
] | A pseudospectrum analysis has recently provided evidence of a potential generic instability of black hole (BH) quasinormal mode (QNM) overtones under high-frequency perturbations. Such instability analysis depends on the assessment of the size of perturbations. This is encoded in the scalar product and its choice is no... |
2109.11831 | Silvia Trabucco | Massimo Mannarelli, Dario Grasso, Silvia Trabucco, Maria Luisa
Chiofalo | Phonon emission by acoustic black holes | Contribution to the 2021 Gravitation session of the 55th Rencontres
de Moriond | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a novel interpretation of the Hawking temperature of acoustic
holes, the hydrodynamic analogue of standard black holes, by connecting the
geometrical properties of the horizon with the distribution function of the
spontaneously generated phonons. Using covariant kinetic theory to describe the
phonon gas em... | [
{
"created": "Fri, 24 Sep 2021 09:20:37 GMT",
"version": "v1"
}
] | 2021-09-28 | [
[
"Mannarelli",
"Massimo",
""
],
[
"Grasso",
"Dario",
""
],
[
"Trabucco",
"Silvia",
""
],
[
"Chiofalo",
"Maria Luisa",
""
]
] | We present a novel interpretation of the Hawking temperature of acoustic holes, the hydrodynamic analogue of standard black holes, by connecting the geometrical properties of the horizon with the distribution function of the spontaneously generated phonons. Using covariant kinetic theory to describe the phonon gas emit... |
0806.3299 | Jose Ademir Sales Lima | J. A. Espich\'an Carrillo, J. M. Silva, J. A. S. Lima | On the Quintessence Scalar Field Potential | 13 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we propose a new analytical method for determining the scalar
field potential $V(\phi)$ in FRW type cosmologies containing a mixture of
perfect fluid plus a quintessence scalar field. By assuming that the equation
of state parameters of the perfect fluid, $\gamma -1 \equiv
p_{\gamma}/\rho_{\gamma}$ and t... | [
{
"created": "Fri, 20 Jun 2008 00:38:49 GMT",
"version": "v1"
}
] | 2008-06-23 | [
[
"Carrillo",
"J. A. Espichán",
""
],
[
"Silva",
"J. M.",
""
],
[
"Lima",
"J. A. S.",
""
]
] | In this work we propose a new analytical method for determining the scalar field potential $V(\phi)$ in FRW type cosmologies containing a mixture of perfect fluid plus a quintessence scalar field. By assuming that the equation of state parameters of the perfect fluid, $\gamma -1 \equiv p_{\gamma}/\rho_{\gamma}$ and the... |
gr-qc/0412066 | Roberto Gomez | W. Barreto, A. Da Silva, R. Gomez, L. Lehner, L. Rosales and J.
Winicour | The 3-dimensional Einstein-Klein-Gordon system in characteristic
numerical relativity | 26 pages, 14 figures | Phys.Rev.D71:064028,2005 | 10.1103/PhysRevD.71.064028 | null | gr-qc | null | We incorporate a massless scalar field into a 3-dimensional code for the
characteristic evolution of the gravitational field. The extended 3-dimensional
code for the Einstein--Klein--Gordon system is calibrated to be second order
convergent. It provides an accurate calculation of the gravitational and scalar
radiatio... | [
{
"created": "Tue, 14 Dec 2004 22:57:45 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Barreto",
"W.",
""
],
[
"Da Silva",
"A.",
""
],
[
"Gomez",
"R.",
""
],
[
"Lehner",
"L.",
""
],
[
"Rosales",
"L.",
""
],
[
"Winicour",
"J.",
""
]
] | We incorporate a massless scalar field into a 3-dimensional code for the characteristic evolution of the gravitational field. The extended 3-dimensional code for the Einstein--Klein--Gordon system is calibrated to be second order convergent. It provides an accurate calculation of the gravitational and scalar radiation ... |
0710.5844 | Bernd Schroers | B. J. Schroers | Lessons from (2+1)-dimensional quantum gravity | 17 pages, two figures, based on talk given at the conference ``From
Quantum to Emergent Gravity: Theory and Phenomenology'',June 11-15 2007,
Trieste, Italy | PoSQG-Ph:035,2007 | null | EMPG-07-21 | gr-qc hep-th math-ph math.MP | null | Proposals that quantum gravity gives rise to non-commutative spacetime
geometry and deformations of Poincare symmetry are examined in the context of
(2+1)-dimensional quantum gravity. The results are expressed in five lessons,
which summarise how the gravitational constant, Planck's constant and the
cosmological cons... | [
{
"created": "Wed, 31 Oct 2007 11:59:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Schroers",
"B. J.",
""
]
] | Proposals that quantum gravity gives rise to non-commutative spacetime geometry and deformations of Poincare symmetry are examined in the context of (2+1)-dimensional quantum gravity. The results are expressed in five lessons, which summarise how the gravitational constant, Planck's constant and the cosmological consta... |
1010.5367 | Stefan Hollands | Stefan Hollands | Correlators, Feynman diagrams, and quantum no-hair in deSitter spacetime | 57 pages, Latex, several figures. v2: more details given on
derivation of parametric formula in sec.5, and exponential decay result in
sec. 6, references added, figures added, typos removed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a parametric representation for position-space Feynman integrals
of a massive, self-interacting scalar field in deSitter spacetime, for an
arbitrary graph. The expression is given as a multiple contour integral over a
kernel whose structure is determined by the set of all trees (or forests)
within the grap... | [
{
"created": "Tue, 26 Oct 2010 11:46:46 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Dec 2010 17:49:55 GMT",
"version": "v2"
}
] | 2010-12-06 | [
[
"Hollands",
"Stefan",
""
]
] | We provide a parametric representation for position-space Feynman integrals of a massive, self-interacting scalar field in deSitter spacetime, for an arbitrary graph. The expression is given as a multiple contour integral over a kernel whose structure is determined by the set of all trees (or forests) within the graph,... |
gr-qc/9704077 | Iellici Devis | Devis Iellici (University of Trento, Italy) | Massive scalar field near a cosmic string | 15 pages, standard LaTeX, no figures. Reference [14] corrected | Class.Quant.Grav.14:3287-3301,1997 | 10.1088/0264-9381/14/12/013 | preprint UTF-397 | gr-qc hep-th | null | The $\zeta$ function of a massive scalar field near a cosmic string is
computed and then employed to find the vacuum fluctuation of the field. The
vacuum expectation value of the energy-momentum tensor is also computed using a
point-splitting approach. The obtained results could be useful also for the
case of self-in... | [
{
"created": "Mon, 28 Apr 1997 12:27:53 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Apr 1997 17:42:55 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Iellici",
"Devis",
"",
"University of Trento, Italy"
]
] | The $\zeta$ function of a massive scalar field near a cosmic string is computed and then employed to find the vacuum fluctuation of the field. The vacuum expectation value of the energy-momentum tensor is also computed using a point-splitting approach. The obtained results could be useful also for the case of self-inte... |
1904.08022 | Anna Ijjas | Anna Ijjas and Paul J. Steinhardt | A new kind of cyclic universe | 7 pages, 3 figures | Phys.Lett. B795 (2019) 666-672 | 10.1016/j.physletb.2019.06.056 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Combining intervals of ekpyrotic (ultra-slow) contraction with a
(non-singular) classical bounce naturally leads to a novel cyclic theory of the
universe in which the Hubble parameter, energy density and temperature
oscillate periodically, but the scale factor grows by an exponential factor
from one cycle to the next... | [
{
"created": "Tue, 16 Apr 2019 23:51:30 GMT",
"version": "v1"
}
] | 2019-07-12 | [
[
"Ijjas",
"Anna",
""
],
[
"Steinhardt",
"Paul J.",
""
]
] | Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale factor grows by an exponential factor from one cycle to the next. ... |
gr-qc/0312112 | Bernd Bruegmann | Bernd Bruegmann, Wolfgang Tichy, Nina Jansen | Numerical simulation of orbiting black holes | 4 pages, 4 figures; several significant changes to presentation for
published version | Phys.Rev.Lett.92:211101,2004 | 10.1103/PhysRevLett.92.211101 | CGPG-03/12-3 | gr-qc | null | We present numerical simulations of binary black hole systems which for the
first time last for about one orbital period for close but still separate black
holes as indicated by the absence of a common apparent horizon. An important
part of the method is the construction of comoving coordinates, in which both
the ang... | [
{
"created": "Fri, 26 Dec 2003 16:53:57 GMT",
"version": "v1"
},
{
"created": "Wed, 12 May 2004 17:22:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bruegmann",
"Bernd",
""
],
[
"Tichy",
"Wolfgang",
""
],
[
"Jansen",
"Nina",
""
]
] | We present numerical simulations of binary black hole systems which for the first time last for about one orbital period for close but still separate black holes as indicated by the absence of a common apparent horizon. An important part of the method is the construction of comoving coordinates, in which both the angul... |
0709.0803 | Petr Slan\'y | P. Slany and Z. Stuchlik | On non-monotonic orbital velocity profiles around rapidly rotating
Kerr-(anti)de Sitter black holes: acomment to the recently published results | 10 pages, 4 figures, submitted to Classical and Quantum Gravity | null | null | null | gr-qc | null | Critical discussion of the recently published results [Muller, A. and
Aschenbach, B. 2007 Class. Quantum Grav. 24, p. 2637; arXiv:0704.3963] on the
non-monotonic orbital velocity profiles of the Keplerian motion of test
particles and l = const motion of test perfect fluid around K(a)dS black holes
is given, and the d... | [
{
"created": "Thu, 6 Sep 2007 09:09:22 GMT",
"version": "v1"
}
] | 2007-09-07 | [
[
"Slany",
"P.",
""
],
[
"Stuchlik",
"Z.",
""
]
] | Critical discussion of the recently published results [Muller, A. and Aschenbach, B. 2007 Class. Quantum Grav. 24, p. 2637; arXiv:0704.3963] on the non-monotonic orbital velocity profiles of the Keplerian motion of test particles and l = const motion of test perfect fluid around K(a)dS black holes is given, and the dis... |
2402.14109 | Elias C. Vagenas | Aatif Kaisar Khan, Yasir Hassan Dar, Elias C. Vagenas, Salman Sajad
Wani, Saif Al-Kuwari, Mir Faizal | Effects of underlying topology on quantum state discrimination | 14 pages, 3 figures, LaTeX, to appear in EPJC | Eur. Phys. J. C 84, 240 (2024) | 10.1140/epjc/s10052-024-12598-9 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we show that quantum state discrimination can be modified due
to a change in the underlying topology of a system. In particular, we
explicitly demonstrate that the quantum state discrimination of systems with
underlying discrete topology differs from that of systems with underlying
continuous topology. ... | [
{
"created": "Wed, 21 Feb 2024 20:17:38 GMT",
"version": "v1"
}
] | 2024-03-12 | [
[
"Khan",
"Aatif Kaisar",
""
],
[
"Dar",
"Yasir Hassan",
""
],
[
"Vagenas",
"Elias C.",
""
],
[
"Wani",
"Salman Sajad",
""
],
[
"Al-Kuwari",
"Saif",
""
],
[
"Faizal",
"Mir",
""
]
] | In this work, we show that quantum state discrimination can be modified due to a change in the underlying topology of a system. In particular, we explicitly demonstrate that the quantum state discrimination of systems with underlying discrete topology differs from that of systems with underlying continuous topology. Su... |
2007.03284 | Huaifan Li | Xiong-Ying Guo, Ying Gao, Huai-Fan Li, Ren Zhao | The entropic force between two horizons of charged Gauss-Bonnet Black
hole in de Sitter Spacetime | 16 pages,3 figures | Physical Review D 102, 124016 (2020) | 10.1103/PhysRevD.102.124016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The basic equations of the thermodynamic system give the relationship between
the internal energy, entropy and volume of two neighboring equilibrium states.
By using the functional relationship between the state parameters in the basic
equation, we give the differential equation satisfied by the entropy of
spacetime.... | [
{
"created": "Tue, 7 Jul 2020 08:57:18 GMT",
"version": "v1"
}
] | 2020-12-16 | [
[
"Guo",
"Xiong-Ying",
""
],
[
"Gao",
"Ying",
""
],
[
"Li",
"Huai-Fan",
""
],
[
"Zhao",
"Ren",
""
]
] | The basic equations of the thermodynamic system give the relationship between the internal energy, entropy and volume of two neighboring equilibrium states. By using the functional relationship between the state parameters in the basic equation, we give the differential equation satisfied by the entropy of spacetime. W... |
gr-qc/0110027 | Roberto Giambo' | Roberto Giambo', Fabio Giannoni, Giulio Magli | Sufficient condition for Blackhole formation in spherical gravitational
collapse | 5 pages, LaTeX2e | Class.Quant.Grav.19:L5,2002 | 10.1088/0264-9381/19/2/101 | null | gr-qc | null | A sufficient condition for the validity of Cosmic Censorship in spherical
gravitational collapse is formulated and proved. The condition relies on an
attractive mathematical property of the apparent horizon, which holds if
''minimal'' requirements of physical reasonableness are satisfied by the matter
model.
| [
{
"created": "Thu, 4 Oct 2001 17:32:25 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Giambo'",
"Roberto",
""
],
[
"Giannoni",
"Fabio",
""
],
[
"Magli",
"Giulio",
""
]
] | A sufficient condition for the validity of Cosmic Censorship in spherical gravitational collapse is formulated and proved. The condition relies on an attractive mathematical property of the apparent horizon, which holds if ''minimal'' requirements of physical reasonableness are satisfied by the matter model. |
1207.3618 | Roman Matsyuk | Roman Matsyuk | A covering second-order Lagrangian for the relativistic top without
forces | V4: Section 3 slightly overwritten, formulae (18) and (25) of v3
corrected. V2: An enhanced version, the expanded development after formula
(15) have been added. Section "Variational attempt" added. V1: Minor
corrections to end formulae and to formula 3a;
http://www.imath.kiev.ua/~symmetry/Symmetry2001/Matsyuk7... | Proceedings of Institute of Mathematics of NAS of Ukraine, vol. 43
(2002) Part 2, 741-745 | null | null | gr-qc math.DG math.DS math.SG physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A parameter-invariant variational problem with a manifestly covariant
Lagrangian function of second order is considered, which covers the case of the
free relativistic top at constraint manifold of constant acceleration
| [
{
"created": "Mon, 16 Jul 2012 10:14:28 GMT",
"version": "v1"
},
{
"created": "Fri, 5 May 2017 07:43:14 GMT",
"version": "v2"
},
{
"created": "Sat, 19 May 2018 11:14:42 GMT",
"version": "v3"
}
] | 2018-05-22 | [
[
"Matsyuk",
"Roman",
""
]
] | A parameter-invariant variational problem with a manifestly covariant Lagrangian function of second order is considered, which covers the case of the free relativistic top at constraint manifold of constant acceleration |
2408.00595 | Sabina Yeasmin | Sabina Yeasmin, Atri Deshamukhya | Embedding Warm Natural Inflation in $f(\phi)T$ gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study warm inflation in the framework of $f(\phi)T$ gravity, where $\phi$
is the inflaton and $T$ is the trace of the energy-momentum tensor. The
inflaton field is assumed to roll on the natural potential and the result is
analyzed in light of Planck 2018 and BICEP/Keck 2021 data. We start our work by
obtaining th... | [
{
"created": "Thu, 1 Aug 2024 14:25:58 GMT",
"version": "v1"
}
] | 2024-08-02 | [
[
"Yeasmin",
"Sabina",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | We study warm inflation in the framework of $f(\phi)T$ gravity, where $\phi$ is the inflaton and $T$ is the trace of the energy-momentum tensor. The inflaton field is assumed to roll on the natural potential and the result is analyzed in light of Planck 2018 and BICEP/Keck 2021 data. We start our work by obtaining the ... |
1203.2113 | Souvik Ghose | S. Ghose, A. Saha, B. C. Paul | Interacting Holographic Generalized Chaplygin Gas in compact
Kaluza-Klein cosmology | 4 pages, 2 figures, pdftex, communicated to Euro. Phys. Lett | null | 10.1142/S0218271814500151 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate Holographic Dark Energy Correspondence of Interacting
Generalized Chaplygin Gas model in the framework of compact Kaluza-Klein
cosmology. The evolution of the modified holographic dark energy and the
equation of state parameter is obtained here.Using the present observational
value of density parameter... | [
{
"created": "Fri, 9 Mar 2012 15:40:01 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Mar 2013 06:08:27 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Mar 2013 14:40:31 GMT",
"version": "v3"
}
] | 2021-11-16 | [
[
"Ghose",
"S.",
""
],
[
"Saha",
"A.",
""
],
[
"Paul",
"B. C.",
""
]
] | We investigate Holographic Dark Energy Correspondence of Interacting Generalized Chaplygin Gas model in the framework of compact Kaluza-Klein cosmology. The evolution of the modified holographic dark energy and the equation of state parameter is obtained here.Using the present observational value of density parameter a... |
1109.6538 | You Ding | Eugenio Bianchi and You Ding | Lorentzian spinfoam propagator | 13 pages, minor changes, references added | Phys. Rev. D 86, 104040 (2012) | 10.1103/PhysRevD.86.104040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two-point correlation function is calculated in the Lorentzian EPRL
spinfoam model, and shown to match with the one in Regge calculus in a proper
limit: large boundary spins, and small Barbero-Immirzi parameter, keeping the
size of the quantum geometry finite and fixed. Compared to the Euclidean case,
the definit... | [
{
"created": "Thu, 29 Sep 2011 14:25:42 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Nov 2011 11:47:38 GMT",
"version": "v2"
}
] | 2012-12-14 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Ding",
"You",
""
]
] | The two-point correlation function is calculated in the Lorentzian EPRL spinfoam model, and shown to match with the one in Regge calculus in a proper limit: large boundary spins, and small Barbero-Immirzi parameter, keeping the size of the quantum geometry finite and fixed. Compared to the Euclidean case, the definitio... |
1210.2650 | Alexis Larranaga PhD | Alexis Larranaga, Juan Carlos Jimenez | On the Komar Energy and the Generalized Smarr Formula for a Charged
Black Hole of Noncommutative Geometry | null | The Abraham Zelmanov Journal. 5. 108-116 (2012) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the Komar energy $E$ for a charged black hole inspired by
noncommutative geometry and identify the total mass ($M_{0}$) by considering
the asymptotic limit. We also found the generalized Smarr formula, which shows
a deformation from the well known relation $M_{0}-\frac{Q_{0}^{2}}{r}=2ST$
depending on the... | [
{
"created": "Tue, 9 Oct 2012 16:02:09 GMT",
"version": "v1"
}
] | 2012-11-07 | [
[
"Larranaga",
"Alexis",
""
],
[
"Jimenez",
"Juan Carlos",
""
]
] | We calculate the Komar energy $E$ for a charged black hole inspired by noncommutative geometry and identify the total mass ($M_{0}$) by considering the asymptotic limit. We also found the generalized Smarr formula, which shows a deformation from the well known relation $M_{0}-\frac{Q_{0}^{2}}{r}=2ST$ depending on the n... |
0710.0544 | Orchidea Maria Lecian | O.M. Lecian, G. Montani | Scalar-tensor analysis of an exponential Lagrangian for the
Gravitational Field | 8 pages, 2 figures, to appear in the proceedings of'' 4th
Italian-Sino Workshop on Relativistic Astrophysics'', AIP Conference Series | AIPConf.Proc.966:264-271,2008 | 10.1063/1.2837006 | null | gr-qc | null | Within the scheme of modified gravity, an exponential Lagrangian density will
be considered, and the corresponding scalar-tensor description will be
addressed for both positive and negative values of the cosmological constant.
For negative values of the cosmological term, the potential of the scalar field
exhibits a ... | [
{
"created": "Tue, 2 Oct 2007 14:32:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lecian",
"O. M.",
""
],
[
"Montani",
"G.",
""
]
] | Within the scheme of modified gravity, an exponential Lagrangian density will be considered, and the corresponding scalar-tensor description will be addressed for both positive and negative values of the cosmological constant. For negative values of the cosmological term, the potential of the scalar field exhibits a mi... |
gr-qc/9905053 | Sergiu Vacaru | Sergiu I. Vacaru | Thermodynamic Geometry and Locally Anisotropic Black Holes | Revtex file, twocolumn, 10 pages without figures | null | null | null | gr-qc astro-ph hep-th | null | Thermodynamic properties of locally anisotropic (2+1)-black holes are studied
by applying geometric methods. We consider a new class of black holes with a
constant in time elliptical event horizon which is imbedded in a generalized
Finsler like spacetime geometry induced from Einstein gravity. The
corresponding therm... | [
{
"created": "Mon, 17 May 1999 08:16:00 GMT",
"version": "v1"
},
{
"created": "Mon, 24 May 1999 14:14:07 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | Thermodynamic properties of locally anisotropic (2+1)-black holes are studied by applying geometric methods. We consider a new class of black holes with a constant in time elliptical event horizon which is imbedded in a generalized Finsler like spacetime geometry induced from Einstein gravity. The corresponding thermod... |
2004.08884 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou, F.P. Fronimos | $f(R)$ Gravity $k$-Essence Late-time Phenomenology | PDU Accepted | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we shall study the late-time behavior of $k$-Essence $f(R)$
gravity without scalar potential, in the presence of matter and radiation
perfect fluids. We quantify the late-time study by using the statefinder
function $Y_H(z)=\frac{\rho_{DE}}{\rho_m^{(0)}}$, which is a function of the
redshift and of the H... | [
{
"created": "Sun, 19 Apr 2020 15:47:53 GMT",
"version": "v1"
}
] | 2020-04-21 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Fronimos",
"F. P.",
""
]
] | In this work we shall study the late-time behavior of $k$-Essence $f(R)$ gravity without scalar potential, in the presence of matter and radiation perfect fluids. We quantify the late-time study by using the statefinder function $Y_H(z)=\frac{\rho_{DE}}{\rho_m^{(0)}}$, which is a function of the redshift and of the Hub... |
2207.06417 | Shubham Sharma Mr | Shubham Sharma, Amruta Desai, Prince A. Ganai | Regular charged black hole in massive gravity as heat engine | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the effect of addition of graviton mass on the efficiency of a
regular charged black hole (RCB). In doing so, we make few comments on the
critical behaviour of the system and calculate the relevant thermodynamic
quantities such as entropy, Hawkings temperature and heat capacity. We confirm
that graviton ma... | [
{
"created": "Wed, 13 Jul 2022 13:53:27 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jul 2022 07:18:02 GMT",
"version": "v2"
}
] | 2022-07-26 | [
[
"Sharma",
"Shubham",
""
],
[
"Desai",
"Amruta",
""
],
[
"Ganai",
"Prince A.",
""
]
] | We examine the effect of addition of graviton mass on the efficiency of a regular charged black hole (RCB). In doing so, we make few comments on the critical behaviour of the system and calculate the relevant thermodynamic quantities such as entropy, Hawkings temperature and heat capacity. We confirm that graviton mass... |
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