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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1708.06638 | Ion I. Cotaescu | Ion I. Cotaescu | de Sitter relativity in central charts | 20 pages, 2 figure. to be published in EPJC. arXiv admin note: text
overlap with arXiv:1706.01785 | null | 10.1140/epjc/s10052-018-5582-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relative geodesic motion in central charts (i.e. static and spherically
symmetric) on the $(1+3)$-dimensional de Sitter spacetimes is studied in terms
of conserved quantities. The Lorentzian isometries are derived, relating the
coordinates of the local chart of a fixed observer with the coordinates of a
mobile ch... | [
{
"created": "Mon, 21 Aug 2017 09:37:21 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2018 14:39:35 GMT",
"version": "v2"
}
] | 2018-01-29 | [
[
"Cotaescu",
"Ion I.",
""
]
] | The relative geodesic motion in central charts (i.e. static and spherically symmetric) on the $(1+3)$-dimensional de Sitter spacetimes is studied in terms of conserved quantities. The Lorentzian isometries are derived, relating the coordinates of the local chart of a fixed observer with the coordinates of a mobile char... |
1909.06889 | Mehdi Saravani | Mehdi Saravani | Dark matter and nonlocality of spacetime | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we review a candidate for dark matter, known as O$f$DM, and
explain how it relates to spacetime nonlocality. This connection provides a
physical interpretation for why O$f$DM exists. Given the state of direct and
indirect searches for dark matter, O$f$DM model would be an important candidate
to consid... | [
{
"created": "Sun, 15 Sep 2019 21:28:12 GMT",
"version": "v1"
}
] | 2019-09-17 | [
[
"Saravani",
"Mehdi",
""
]
] | In this letter, we review a candidate for dark matter, known as O$f$DM, and explain how it relates to spacetime nonlocality. This connection provides a physical interpretation for why O$f$DM exists. Given the state of direct and indirect searches for dark matter, O$f$DM model would be an important candidate to consider... |
1103.0645 | Saibal Ray | R. N. Tiwari, Saibal Ray and Sumana Bhadra | Relativistic Electromagnetic Mass Models With Cosmological
Variable$\Lambda$ in Spherically Symmetric Anisotropic Source | 10 Latex pages | Indian J. Pure Appl. Math., 31, 1017-1024 (2000) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of exact solutions for the Einstein-Maxwell field equations are
obtained by assuming the erstwhile cosmological constant $ \Lambda $ to be a
space-variable scalar, viz., $ \Lambda =\Lambda(r) $. The source considered
here is static, spherically symmetric and anisotropic charged fluid. The
solutions obtained a... | [
{
"created": "Thu, 3 Mar 2011 10:28:59 GMT",
"version": "v1"
}
] | 2011-03-04 | [
[
"Tiwari",
"R. N.",
""
],
[
"Ray",
"Saibal",
""
],
[
"Bhadra",
"Sumana",
""
]
] | A class of exact solutions for the Einstein-Maxwell field equations are obtained by assuming the erstwhile cosmological constant $ \Lambda $ to be a space-variable scalar, viz., $ \Lambda =\Lambda(r) $. The source considered here is static, spherically symmetric and anisotropic charged fluid. The solutions obtained are... |
gr-qc/9907048 | Jiri Podolsky | J. Bicak, J. Podolsky | Gravitational waves in vacuum spacetimes with cosmological constant. I.
Classification and geometrical properties of non-twisting type N solutions | 16 pages, no figures, LaTeX, To appear in J. Math. Phys | J.Math.Phys. 40 (1999) 4495-4505 | 10.1063/1.532981 | null | gr-qc | null | All non-twisting Petrov-type N solutions of vacuum Einstein field equations
with cosmological constant Lambda are summarized. They are shown to belong
either to the non-expanding Kundt class or to the expanding Robinson-Trautman
class. Invariant subclasses of each class are defined and the corresponding
metrics are g... | [
{
"created": "Tue, 13 Jul 1999 15:12:18 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Bicak",
"J.",
""
],
[
"Podolsky",
"J.",
""
]
] | All non-twisting Petrov-type N solutions of vacuum Einstein field equations with cosmological constant Lambda are summarized. They are shown to belong either to the non-expanding Kundt class or to the expanding Robinson-Trautman class. Invariant subclasses of each class are defined and the corresponding metrics are giv... |
1105.2425 | Barun Majumder | Barun Majumder | The Generalized Uncertainty Principle and the Friedmann equations | 6 pages, accepted for publication in Astrophysics and Space Science | Astrophysics and Space Science, 336, 2, 331-335 (2011) | 10.1007/s10509-011-0815-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Generalized Uncertainty Principle (or GUP) affects the dynamics in Plank
scale. So the known equations of physics are expected to get modified at that
very high energy regime. Very recently authors in (Ali et al. 2009) proposed a
new Generalized Uncertainty Principle (or GUP) with a linear term in Plank
length. I... | [
{
"created": "Thu, 12 May 2011 11:04:43 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2011 14:10:07 GMT",
"version": "v2"
}
] | 2011-11-29 | [
[
"Majumder",
"Barun",
""
]
] | The Generalized Uncertainty Principle (or GUP) affects the dynamics in Plank scale. So the known equations of physics are expected to get modified at that very high energy regime. Very recently authors in (Ali et al. 2009) proposed a new Generalized Uncertainty Principle (or GUP) with a linear term in Plank length. In ... |
1412.5561 | Michael Reiterer | Michael Reiterer, Eugene Trubowitz | The graded Lie algebra of general relativity | 41 pages | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a graded Lie algebra in which a solution to the vacuum Einstein
equations is any element of degree 1 whose bracket with itself is zero. Each
solution generates a cochain complex, whose first cohomology is linearized
gravity about that solution. We gauge-fix to get a smaller cochain complex with
the same ... | [
{
"created": "Wed, 17 Dec 2014 20:27:10 GMT",
"version": "v1"
}
] | 2014-12-18 | [
[
"Reiterer",
"Michael",
""
],
[
"Trubowitz",
"Eugene",
""
]
] | We construct a graded Lie algebra in which a solution to the vacuum Einstein equations is any element of degree 1 whose bracket with itself is zero. Each solution generates a cochain complex, whose first cohomology is linearized gravity about that solution. We gauge-fix to get a smaller cochain complex with the same co... |
1303.2014 | Adel Awad | Adel Awad | Fixed points and FLRW cosmologies: Flat case | 20 pages, 8 figures. Several references added as well as comments on
the r=1/4 case | null | 10.1103/PhysRevD.87.103001 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use phase space method to study possible consequences of fixed points in
flat FLRW models. One of these consequences is that a fluid with a finite sound
speed, or a differentiable pressure, reaches a fixed point in an infinite time
and has no finite-time singularities of types I, II and III described in
hep-th/050... | [
{
"created": "Fri, 8 Mar 2013 14:55:35 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Mar 2013 12:18:53 GMT",
"version": "v2"
}
] | 2013-05-15 | [
[
"Awad",
"Adel",
""
]
] | We use phase space method to study possible consequences of fixed points in flat FLRW models. One of these consequences is that a fluid with a finite sound speed, or a differentiable pressure, reaches a fixed point in an infinite time and has no finite-time singularities of types I, II and III described in hep-th/05010... |
0710.5803 | Xin-Bing Huang | Xin-Bing Huang | Covariant Theory of Gravitation in the Spacetime with Finsler Structure | 18 pages, no figure | null | null | null | gr-qc | null | The theory of gravitation in the spacetime with Finsler structure is
constructed. It is shown that the theory keeps general covariance. Such theory
reduces to Einstein's general relativity when the Finsler structure is
Riemannian. Therefore, this covariant theory of gravitation is an elegant
realization of Einstein's... | [
{
"created": "Wed, 31 Oct 2007 04:58:57 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2007 02:02:42 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Nov 2007 01:41:36 GMT",
"version": "v3"
},
{
"created": "Sun, 11 Nov 2007 03:12:16 GMT",
"version": "v4"
}
] | 2007-11-11 | [
[
"Huang",
"Xin-Bing",
""
]
] | The theory of gravitation in the spacetime with Finsler structure is constructed. It is shown that the theory keeps general covariance. Such theory reduces to Einstein's general relativity when the Finsler structure is Riemannian. Therefore, this covariant theory of gravitation is an elegant realization of Einstein's t... |
2209.01221 | Bei Zhou | Bei Zhou, Luca Reali, Emanuele Berti, Mesut \c{C}al{\i}\c{s}kan, Cyril
Creque-Sarbinowski, Marc Kamionkowski, B. S. Sathyaprakash | Compact Binary Foreground Subtraction in Next-Generation Ground-Based
Observatories | 6 pages, 2 figures | null | null | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stochastic gravitational-wave backgrounds (SGWBs) for current detectors
are dominated by binary black-hole (BBH) and binary neutron-star (BNS)
coalescences. The sensitivity of current networks of gravitational-wave (GW)
detectors allows only a small fraction of BBHs and BNSs to be resolved and
subtracted, but pre... | [
{
"created": "Fri, 2 Sep 2022 18:00:01 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Zhou",
"Bei",
""
],
[
"Reali",
"Luca",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Çalışkan",
"Mesut",
""
],
[
"Creque-Sarbinowski",
"Cyril",
""
],
[
"Kamionkowski",
"Marc",
""
],
[
"Sathyaprakash",
"B. S.",
""
... | The stochastic gravitational-wave backgrounds (SGWBs) for current detectors are dominated by binary black-hole (BBH) and binary neutron-star (BNS) coalescences. The sensitivity of current networks of gravitational-wave (GW) detectors allows only a small fraction of BBHs and BNSs to be resolved and subtracted, but previ... |
1709.08974 | Alexander Nitz | Alexander Harvey Nitz | Distinguishing short duration noise transients in LIGO data to improve
the PyCBC search for gravitational waves from high mass binary black hole
mergers | 5 pages, 4 figures, as accepted by CQG | Class.Quant.Grav. 35 (2018) no.3, 035016 | 10.1088/1361-6382/aaa13d | LIGO-P1700275 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | "Blip glitches" are a type of short duration transient noise in LIGO data.
The cause for the majority of these is currently unknown. Short duration
transient noise creates challenges for searches of the highest mass binary
black hole systems, as standard methods of applying signal consistency, which
look for consiste... | [
{
"created": "Tue, 26 Sep 2017 12:29:40 GMT",
"version": "v1"
},
{
"created": "Sun, 27 May 2018 18:50:56 GMT",
"version": "v2"
}
] | 2018-05-29 | [
[
"Nitz",
"Alexander Harvey",
""
]
] | "Blip glitches" are a type of short duration transient noise in LIGO data. The cause for the majority of these is currently unknown. Short duration transient noise creates challenges for searches of the highest mass binary black hole systems, as standard methods of applying signal consistency, which look for consistenc... |
2308.00635 | Antonio G. Bello-Morales | Antonio G. Bello-Morales and Antonio L. Maroto | Cosmology in gravity models with broken diffeomorphisms | 13 pages, 9 figures. Final version to appear in PRD | null | null | IPARCOS-UCM-23-066 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological implications of gravity models which break
diffeomorphisms (Diff) invariance down to transverse diffeomorphisms (TDiff).
We start from the most general gravitational action involving up to quadratic
terms in derivatives of the metric tensor and identify TDiff models as the only
stable theori... | [
{
"created": "Tue, 1 Aug 2023 16:05:39 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2024 16:48:58 GMT",
"version": "v2"
}
] | 2024-02-02 | [
[
"Bello-Morales",
"Antonio G.",
""
],
[
"Maroto",
"Antonio L.",
""
]
] | We study the cosmological implications of gravity models which break diffeomorphisms (Diff) invariance down to transverse diffeomorphisms (TDiff). We start from the most general gravitational action involving up to quadratic terms in derivatives of the metric tensor and identify TDiff models as the only stable theories... |
2012.06831 | Samuel S\'anchez L\'opez | Konstantinos Dimopoulos and Samuel S\'anchez L\'opez | Quintessential inflation in Palatini $f(R)$ gravity | null | Phys. Rev. D 103, 043533 (2021) | 10.1103/PhysRevD.103.043533 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate in detail a family of quintessential inflation models in the
context of $R+R^2$ Palatini modified gravity. We find that successful inflation
and quintessence are obtained with an inflaton scalar potential that is
approximately quadratic in inflation and inverse quartic in quintessence. We
show that cor... | [
{
"created": "Sat, 12 Dec 2020 14:43:12 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jan 2021 12:35:55 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Feb 2021 18:52:41 GMT",
"version": "v3"
}
] | 2021-02-26 | [
[
"Dimopoulos",
"Konstantinos",
""
],
[
"López",
"Samuel Sánchez",
""
]
] | We investigate in detail a family of quintessential inflation models in the context of $R+R^2$ Palatini modified gravity. We find that successful inflation and quintessence are obtained with an inflaton scalar potential that is approximately quadratic in inflation and inverse quartic in quintessence. We show that corre... |
gr-qc/0603054 | Yanbei Chen | Yanbei Chen (1), Archana Pai (1), Kentaro Somiya (1), Seiji Kawamura
(2), Shuichi Sato (2), Keiko Kokeyama (3), Robert L. Ward (4) ((1) AEI, (2)
NAOJ, (3) Ochanomizu Univ., (4) Caltech) | Interferometers for Displacement-Noise-Free Gravitational-Wave Detection | 5 pages, 4 figures | Phys.Rev.Lett.97:151103,2006 | 10.1103/PhysRevLett.97.151103 | null | gr-qc | null | We propose a class of displacement- and laser-noise free
gravitational-wave-interferometer configurations, which does not sense
non-geodesic mirror motions and laser noises, but provides non-vanishing
gravitational-wave signal. Our interferometer consists of 4 mirrors and 2
beamsplitters, which form 4 Mach-Zehnder in... | [
{
"created": "Tue, 14 Mar 2006 05:14:03 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Mar 2006 13:07:35 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chen",
"Yanbei",
""
],
[
"Pai",
"Archana",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Kawamura",
"Seiji",
""
],
[
"Sato",
"Shuichi",
""
],
[
"Kokeyama",
"Keiko",
""
],
[
"Ward",
"Robert L.",
""
]
] | We propose a class of displacement- and laser-noise free gravitational-wave-interferometer configurations, which does not sense non-geodesic mirror motions and laser noises, but provides non-vanishing gravitational-wave signal. Our interferometer consists of 4 mirrors and 2 beamsplitters, which form 4 Mach-Zehnder inte... |
1307.0730 | Mahouton J. Stephane Houndjo Dr | I. G. Salako, M. E. Rodrigues, A. V. Kpadonou, M. J. S. Houndjo and J.
Tossa | LCDM Model in f(T) Gravity: Reconstruction, Thermodynamics and Stability | 25 pages, 2 figures, Accepted for publication in Journal of Cosmology
and Astroparticle Physics (JCAP) | JCAP 060, 1475-7516 (2013) | 10.1088/1475-7516/2013/11/060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate some cosmological features of the LCDM model in the framework
of the generalized teleparallel theory of gravity f(T) where T denotes the
torsion scalar. Its reconstruction is performed giving rise to an integration
constant Q and other input parameters according to which we point out more
analysis. The... | [
{
"created": "Sat, 29 Jun 2013 14:27:57 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jul 2013 11:38:48 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Nov 2013 23:32:31 GMT",
"version": "v3"
}
] | 2013-12-10 | [
[
"Salako",
"I. G.",
""
],
[
"Rodrigues",
"M. E.",
""
],
[
"Kpadonou",
"A. V.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Tossa",
"J.",
""
]
] | We investigate some cosmological features of the LCDM model in the framework of the generalized teleparallel theory of gravity f(T) where T denotes the torsion scalar. Its reconstruction is performed giving rise to an integration constant Q and other input parameters according to which we point out more analysis. There... |
gr-qc/0003040 | Domenico Giulini | Domenico Giulini (University of Zuerich) | Group Averaging and Refined Algebraic Quantization | 4 pages, LaTeX 2.09 using espcrc2.sty. To appear in the proceedings
of the third "Meeting on Constrained Dynamics and Quantum Gravity", Nucl.
Phys. B (Proc. Suppl.) | Nucl.Phys.Proc.Suppl. 88 (2000) 385-388 | 10.1016/S0920-5632(00)00808-2 | ZU-TH 6/00 | gr-qc math-ph math.MP | null | We review the framework of Refined Algebraic Quantization and the method of
Group Averaging for quantizing systems with first-class constraints. Aspects
and results concerning the generality, limitations, and uniqueness of these
methods are discussed.
| [
{
"created": "Thu, 9 Mar 2000 16:50:37 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Giulini",
"Domenico",
"",
"University of Zuerich"
]
] | We review the framework of Refined Algebraic Quantization and the method of Group Averaging for quantizing systems with first-class constraints. Aspects and results concerning the generality, limitations, and uniqueness of these methods are discussed. |
0907.0556 | Tomohiro Takahashi | Tomohiro Takahashi and Jiro Soda | Instability of Small Lovelock Black Holes in Even-dimensions | 14 pages, 2 figures | null | 10.1103/PhysRevD.80.104021 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of static black holes in Lovelock theory which is a
natural higher dimensional generalization of Einstein theory. We derive a
master equation for tensor perturbations in general Lovelock theory. It turns
out that the resultant equation is characterized by one functional which
determines the bac... | [
{
"created": "Fri, 3 Jul 2009 08:25:47 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Oct 2009 23:55:06 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Takahashi",
"Tomohiro",
""
],
[
"Soda",
"Jiro",
""
]
] | We study the stability of static black holes in Lovelock theory which is a natural higher dimensional generalization of Einstein theory. We derive a master equation for tensor perturbations in general Lovelock theory. It turns out that the resultant equation is characterized by one functional which determines the backg... |
1908.09074 | Sumanta Chakraborty | T.R. Govindarajan and Sumanta Chakraborty | Embedding into flat spacetime and black hole thermodynamics | Published version, 16 pages, no figures | Mod. Phys. Lett. A 34, 2050013 (2019) | 10.1142/S0217732320500133 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that static and spherically symmetric black hole solutions of
general relativity in different spacetimes can be embedded into higher
dimensional flat spacetime. Given this result, we have explored the
thermodynamic nature of black holes \'{a} la its embedding into flat spacetime.
In particular, we have ex... | [
{
"created": "Sat, 24 Aug 2019 02:24:15 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2019 04:11:49 GMT",
"version": "v2"
},
{
"created": "Mon, 28 Oct 2019 08:35:37 GMT",
"version": "v3"
}
] | 2019-10-29 | [
[
"Govindarajan",
"T. R.",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | It is known that static and spherically symmetric black hole solutions of general relativity in different spacetimes can be embedded into higher dimensional flat spacetime. Given this result, we have explored the thermodynamic nature of black holes \'{a} la its embedding into flat spacetime. In particular, we have expl... |
2401.00144 | De-Cheng Zou | Kun-Hui Fan, Yun Soo Myung, De-Cheng Zou and Meng-Yun Lai | Scalarization of Kerr-Newman black holes in the
Einstein-Chern-Simons-scalar theory | 18 pages, 4 figures, minor changes | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the tachyonic instability of Kerr-Newman (KN) black hole with
a rotation parameter $a$ in the Einstein-Chern-Simons-scalar theory coupled
with a quadratic massive scalar field. This instability analysis corresponds to
exploring the onset of spontaneous scalarization for KN black holes. First, we
find n... | [
{
"created": "Sat, 30 Dec 2023 05:07:42 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jan 2024 07:14:42 GMT",
"version": "v2"
}
] | 2024-01-03 | [
[
"Fan",
"Kun-Hui",
""
],
[
"Myung",
"Yun Soo",
""
],
[
"Zou",
"De-Cheng",
""
],
[
"Lai",
"Meng-Yun",
""
]
] | We investigate the tachyonic instability of Kerr-Newman (KN) black hole with a rotation parameter $a$ in the Einstein-Chern-Simons-scalar theory coupled with a quadratic massive scalar field. This instability analysis corresponds to exploring the onset of spontaneous scalarization for KN black holes. First, we find no ... |
1406.3434 | Vladimir S. Manko | V. S. Manko and H. Garcia-Compean | On non-disk geometry of r = 0 in Kerr-de Sitter and Kerr-Newman-de
Sitter spacetimes | 11 pages, 4 figures | Phys. Rev. D 90, 047501 (2014) | 10.1103/PhysRevD.90.047501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gaussian curvature of the two-surface r=0, t=const is calculated for the
Kerr-de Sitter and Kerr-Newman-de Sitter solutions, yielding non-zero
analytical expressions for both the cases. The results obtained, on the one
hand, exclude the possibility for that surface to be a disk and, on the other
hand, permit one to e... | [
{
"created": "Fri, 13 Jun 2014 06:40:32 GMT",
"version": "v1"
}
] | 2014-08-20 | [
[
"Manko",
"V. S.",
""
],
[
"Garcia-Compean",
"H.",
""
]
] | Gaussian curvature of the two-surface r=0, t=const is calculated for the Kerr-de Sitter and Kerr-Newman-de Sitter solutions, yielding non-zero analytical expressions for both the cases. The results obtained, on the one hand, exclude the possibility for that surface to be a disk and, on the other hand, permit one to est... |
2201.02203 | Paulo Luz | Jos\'e P. S. Lemos and Paulo Luz | Bubble universes and traversable wormholes | 24 pages, 8 figures | Physical Review D 105, 044058 (2022) | 10.1103/PhysRevD.105.044058 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Bubble universes and traversable wormholes in general relativity can be
realized as two sides of the same concept. To exemplify, we find, display, and
study in a unified manner a Minkowski-Minkowski closed universe and a
Minkowski-Minkowski traversable wormhole. By joining two 3-dimensional flat
balls along a thin sh... | [
{
"created": "Thu, 6 Jan 2022 19:00:01 GMT",
"version": "v1"
}
] | 2022-10-20 | [
[
"Lemos",
"José P. S.",
""
],
[
"Luz",
"Paulo",
""
]
] | Bubble universes and traversable wormholes in general relativity can be realized as two sides of the same concept. To exemplify, we find, display, and study in a unified manner a Minkowski-Minkowski closed universe and a Minkowski-Minkowski traversable wormhole. By joining two 3-dimensional flat balls along a thin shel... |
gr-qc/0703082 | Shankaranarayanan S | Saurya Das (U. of Lethbridge), S. Shankaranarayanan (AEI, Golm) | Where are the black hole entropy degrees of freedom ? | 5 pages, 3 eps figures, uses Revtex4, References added, Minor changes
to match published version | Class.Quant.Grav.24:5299-5306,2007 | 10.1088/0264-9381/24/20/022 | AEI-2007-012 | gr-qc hep-th quant-ph | null | Understanding the area-proportionality of black hole entropy (the `Area Law')
from an underlying fundamental theory has been one of the goals of all models
of quantum gravity. A key question that one asks is: where are the degrees of
freedom giving rise to black hole entropy located? Taking the point of view
that ent... | [
{
"created": "Wed, 14 Mar 2007 18:47:47 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2007 05:58:28 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Das",
"Saurya",
"",
"U. of Lethbridge"
],
[
"Shankaranarayanan",
"S.",
"",
"AEI, Golm"
]
] | Understanding the area-proportionality of black hole entropy (the `Area Law') from an underlying fundamental theory has been one of the goals of all models of quantum gravity. A key question that one asks is: where are the degrees of freedom giving rise to black hole entropy located? Taking the point of view that entan... |
1603.04170 | Marco de Cesare | Marco de Cesare, Fedele Lizzi, Mairi Sakellariadou | Effective cosmological constant induced by stochastic fluctuations of
Newton's constant | 10 pages, 1 figure, v2: added legend in Fig.1 and a reference | Phys.Lett.B 760 (2016) 498-501 | 10.1016/j.physletb.2016.07.015 | ICCUB-16-012, KCL-PH-TH/2016-12 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider implications of the microscopic dynamics of spacetime for the
evolution of cosmological models. We argue that quantum geometry effects may
lead to stochastic fluctuations of the gravitational constant, which is thus
considered as a macroscopic effective dynamical quantity. Consistency with
Riemannian geom... | [
{
"created": "Mon, 14 Mar 2016 09:07:35 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Mar 2016 11:48:50 GMT",
"version": "v2"
}
] | 2022-09-15 | [
[
"de Cesare",
"Marco",
""
],
[
"Lizzi",
"Fedele",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | We consider implications of the microscopic dynamics of spacetime for the evolution of cosmological models. We argue that quantum geometry effects may lead to stochastic fluctuations of the gravitational constant, which is thus considered as a macroscopic effective dynamical quantity. Consistency with Riemannian geomet... |
2010.01689 | Tayebeh Tahamtan | T. Tahamtan | On the compatibility of Nonlinear Electrodynamics models with
Robinson--Trautman geometry | Comments welcome | Phys. Rev. D 103, 064052 (2021) | 10.1103/PhysRevD.103.064052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Robinson--Trautman solutions with Nonlinear Electrodynamics are investigated
for both L(F ) and L(F, G) Lagrangians and presence of electric and magnetic
charges as well as electromagnetic radiation is assumed. Particular interest is
devoted to models representing regular black holes for spherically symmetric
situati... | [
{
"created": "Sun, 4 Oct 2020 21:31:51 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Mar 2021 15:27:39 GMT",
"version": "v2"
}
] | 2021-03-24 | [
[
"Tahamtan",
"T.",
""
]
] | Robinson--Trautman solutions with Nonlinear Electrodynamics are investigated for both L(F ) and L(F, G) Lagrangians and presence of electric and magnetic charges as well as electromagnetic radiation is assumed. Particular interest is devoted to models representing regular black holes for spherically symmetric situation... |
gr-qc/0408078 | Matias Aiello | Matias Aiello, Rafael Ferraro, Gaston Giribet | Exact Solutions of Lovelock-Born-Infeld Black Holes | 9 pages, 7 figures, Revtex. Extended version of the paper published
in Phys. Rev. D | Phys.Rev. D70 (2004) 104014 | 10.1103/PhysRevD.70.104014 | null | gr-qc hep-th | null | The exact five-dimensional charged black hole solution in Lovelock gravity
coupled to Born-Infeld electrodynamics is presented. This solution interpolates
between the Hoffmann black hole for the Einstein-Born-Infeld theory and other
solutions in the Lovelock theory previously studied in the literature. The
conical si... | [
{
"created": "Tue, 24 Aug 2004 00:19:33 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Sep 2004 20:52:34 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Nov 2004 22:44:45 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Aiello",
"Matias",
""
],
[
"Ferraro",
"Rafael",
""
],
[
"Giribet",
"Gaston",
""
]
] | The exact five-dimensional charged black hole solution in Lovelock gravity coupled to Born-Infeld electrodynamics is presented. This solution interpolates between the Hoffmann black hole for the Einstein-Born-Infeld theory and other solutions in the Lovelock theory previously studied in the literature. The conical sing... |
0910.4832 | Vitaly Melnikov Nikolaevich | V.N. Melnikov | Models of G time variations in diverse dimensions | 27 pages, Latex | Front.Phys.China 4:75-93,2009 | 10.1007/s11467-009-0008-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of different cosmological models in diverse dimensions leading to a
relatively small time variation of the effective gravitational constant G is
presented. Among them: 4-dimensional general scalar-tensor model,
multidimensional vacuum model with two curved Einstein spaces, multidimensional
model with multico... | [
{
"created": "Mon, 26 Oct 2009 09:02:36 GMT",
"version": "v1"
}
] | 2009-10-29 | [
[
"Melnikov",
"V. N.",
""
]
] | A review of different cosmological models in diverse dimensions leading to a relatively small time variation of the effective gravitational constant G is presented. Among them: 4-dimensional general scalar-tensor model, multidimensional vacuum model with two curved Einstein spaces, multidimensional model with multicomp... |
1611.05989 | Debojit Sarma | Debojit Sarma, Faizuddin Ahmed and Mahadev Patgiri | Axially symmetric, asymptotically flat vacuum metric with a naked
singularity and closed timelike curves | 8 pages, no figures | null | 10.1155/2016/2546186 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an axially symmetric, asymptotically flat empty space solution of
the Einstein field equations containing a naked singularity. The spacetime is
regular everywhere except on the symmetry axis where it possess a true
curvature singularity. The spacetime is of type D in the Petrov classification
scheme and is... | [
{
"created": "Fri, 18 Nov 2016 06:27:25 GMT",
"version": "v1"
}
] | 2017-04-26 | [
[
"Sarma",
"Debojit",
""
],
[
"Ahmed",
"Faizuddin",
""
],
[
"Patgiri",
"Mahadev",
""
]
] | We present an axially symmetric, asymptotically flat empty space solution of the Einstein field equations containing a naked singularity. The spacetime is regular everywhere except on the symmetry axis where it possess a true curvature singularity. The spacetime is of type D in the Petrov classification scheme and is l... |
1911.12974 | Jitendra Kumar Dr. | Amit Kumar Prasad, Jitendra Kumar, Ashok Kumar | Isotropic uncharged model with compactness and stable con gurations | null | null | 10.1007/s40065-021-00341-1 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In present work, we have studied a new stellar distribution model with
spherically symmetric matter and an uncharged isotropic distribution in general
relativity. In this model, we have considered a particular metric potential.
The model is capable to represents some known compact stars like Her X-1,4U
1538-52 and SA... | [
{
"created": "Fri, 29 Nov 2019 06:57:43 GMT",
"version": "v1"
}
] | 2021-09-03 | [
[
"Prasad",
"Amit Kumar",
""
],
[
"Kumar",
"Jitendra",
""
],
[
"Kumar",
"Ashok",
""
]
] | In present work, we have studied a new stellar distribution model with spherically symmetric matter and an uncharged isotropic distribution in general relativity. In this model, we have considered a particular metric potential. The model is capable to represents some known compact stars like Her X-1,4U 1538-52 and SAX ... |
2010.10074 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Douglas A. Ferreira, Dionisio Bazeia, Francisco S.
N. Lobo | Thick brane structures in generalized hybrid metric-Palatini gravity | 12 pages, 10 figures | Eur. Phys. J. C 81, 20 (2021) | 10.1140/epjc/s10052-021-08840-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study 5-dimensional braneworld scenarios in the
scalar-tensor representation of the generalized hybrid metric-Palatini
gravitational theory. We start by considering a model for a brane supported
purely by the gravitational scalar fields of the theory and then consider other
distinct cases where the m... | [
{
"created": "Tue, 20 Oct 2020 07:03:39 GMT",
"version": "v1"
}
] | 2021-01-19 | [
[
"Rosa",
"João Luís",
""
],
[
"Ferreira",
"Douglas A.",
""
],
[
"Bazeia",
"Dionisio",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this work, we study 5-dimensional braneworld scenarios in the scalar-tensor representation of the generalized hybrid metric-Palatini gravitational theory. We start by considering a model for a brane supported purely by the gravitational scalar fields of the theory and then consider other distinct cases where the mod... |
2306.08064 | Nikolaos Mavromatos | Nick E. Mavromatos | A string-inspired running-vacuum-model of cosmology,
primordial-black-hole dark matter, and the current tensions in cosmological
data | 29 pages latex, uses special macros (Proceedings of Science), several
pdf figures incorporated; Invited talk, presented at Corfu Summer Institute
2022 "School and Workshops on Elementary Particle Physics and Gravity", 28
August - 1 October, 2022, Corfu, Greece | null | null | KCL-TH-PH/2023-34 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review a cosmological model based on string-inspired gravity with anomalies
and torsion, which leads to a cosmology of running-vacuum-model (RVM) type. It
is argued that such a model can lead to observable, in principle, deviations
from the standard $\Lambda$CDM paradigm of cosmology at late (modern) eras of
the Un... | [
{
"created": "Tue, 13 Jun 2023 18:27:54 GMT",
"version": "v1"
}
] | 2023-06-16 | [
[
"Mavromatos",
"Nick E.",
""
]
] | I review a cosmological model based on string-inspired gravity with anomalies and torsion, which leads to a cosmology of running-vacuum-model (RVM) type. It is argued that such a model can lead to observable, in principle, deviations from the standard $\Lambda$CDM paradigm of cosmology at late (modern) eras of the Univ... |
gr-qc/9712012 | Frank Antonsen | Frank Antonsen | Deformation Quantisation of Gravity | uses LaTeX2e. Errors corrected, discussion extended | null | null | null | gr-qc hep-th math-ph math.MP | null | We study the deformation (Moyal) quantisation of gravity in both the ADM and
the Ashtekar approach. It is shown, that both can be treated, but lead to
anomalies. The anomaly in the case of Ashtekar variables, however, is merely a
central extension of the constraint algebra, which can be ``lifted''.
Finally we write... | [
{
"created": "Tue, 2 Dec 1997 13:42:17 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Sep 1998 13:41:28 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Antonsen",
"Frank",
""
]
] | We study the deformation (Moyal) quantisation of gravity in both the ADM and the Ashtekar approach. It is shown, that both can be treated, but lead to anomalies. The anomaly in the case of Ashtekar variables, however, is merely a central extension of the constraint algebra, which can be ``lifted''. Finally we write dow... |
1001.4233 | Azam Izadi | Azam Izadi and Ali Shojai | f(R) cosmological solutions with varying speed of light | 15 pages, to appear in PLB | Physics Letters B 684 (2010) 185--193 | 10.1016/j.physletb.2010.01.028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider f(R) modified gravity theories for describing varying speed of
light in a spatially flat FRW model, and find some exact solutions. Also we
examine the dynamics of this model by dynamical system method assuming a
LambdaCDM background and we find some exact solutions by considering the
character of critical... | [
{
"created": "Sun, 24 Jan 2010 09:58:04 GMT",
"version": "v1"
}
] | 2010-02-02 | [
[
"Izadi",
"Azam",
""
],
[
"Shojai",
"Ali",
""
]
] | We consider f(R) modified gravity theories for describing varying speed of light in a spatially flat FRW model, and find some exact solutions. Also we examine the dynamics of this model by dynamical system method assuming a LambdaCDM background and we find some exact solutions by considering the character of critical p... |
gr-qc/9603009 | Marian Chamula | Vladimir Skalsky and Miroslav Sukenik | Gravitation Interaction and Electromagnetic Interaction in the
Relativistic Universe with Total Zero and Local Non-Zero Energy | LaTeX, 10 pages, 1 figure | Astrophys.Space Sci.166:159-164,1990 | 10.1007/BF00655615 | null | gr-qc | null | In the model of flat expansive homogeneous and isotropic relativistic
universe with total zero and local non-zero energy the gravitation energy of
bodies and the elecromagnetic energy of charged bodies can be localised.
| [
{
"created": "Fri, 8 Mar 1996 10:10:49 GMT",
"version": "v1"
}
] | 2009-01-14 | [
[
"Skalsky",
"Vladimir",
""
],
[
"Sukenik",
"Miroslav",
""
]
] | In the model of flat expansive homogeneous and isotropic relativistic universe with total zero and local non-zero energy the gravitation energy of bodies and the elecromagnetic energy of charged bodies can be localised. |
gr-qc/9507021 | Marcelo Jose Reboucas | J. Santos, M.J. Reboucas, A.F.F. Teixeira | Segre Types of Symmetric Two-tensors in n-Dimensional Spacetimes | 14 pages, LaTeX, replaced due to a LaTex error | Gen.Rel.Grav. 27 (1995) 989-999 | 10.1007/BF02113081 | CBPF-NF 041/95 | gr-qc astro-ph | null | Three propositions about Jordan matrices are proved and applied to
algebraically classify the Ricci tensor in n-dimensional Kaluza-Klein-type
spacetimes. We show that the possible Segre types are [1,1...1], [21...1],
[31\ldots 1], [z\bar{z}1...1] and degeneracies thereof. A set of canonical
forms for the Segre types ... | [
{
"created": "Tue, 11 Jul 1995 01:27:08 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 1995 00:33:31 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Santos",
"J.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Teixeira",
"A. F. F.",
""
]
] | Three propositions about Jordan matrices are proved and applied to algebraically classify the Ricci tensor in n-dimensional Kaluza-Klein-type spacetimes. We show that the possible Segre types are [1,1...1], [21...1], [31\ldots 1], [z\bar{z}1...1] and degeneracies thereof. A set of canonical forms for the Segre types is... |
1010.1547 | Salvatore Capozziello | Mariam Bouhmadi-Lopez, Salvatore Capozziello, Vincenzo F. Cardone | Cosmography of f(R) - brane cosmology | 9 pages, 3 figures, to appear in Phys. Rev. D | Phys.Rev.D82:103526,2010 | 10.1103/PhysRevD.82.103526 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmography is a useful tool to constrain cosmological models, in particular
dark energy models. In the case of modified theories of gravity, where the
equations of motion are generally quite complicated, cosmography can contribute
to select realistic models without imposing arbitrary choices a priori. Indeed,
its re... | [
{
"created": "Thu, 7 Oct 2010 21:03:24 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Cardone",
"Vincenzo F.",
""
]
] | Cosmography is a useful tool to constrain cosmological models, in particular dark energy models. In the case of modified theories of gravity, where the equations of motion are generally quite complicated, cosmography can contribute to select realistic models without imposing arbitrary choices a priori. Indeed, its reli... |
2403.13919 | Maria Shubina | Maria V. Shubina | General vacuum solution of modified $F(G)$-gravity with Gauss-Bonnet
term | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a general vacuum solution of the modified
Gauss-Bonnet gravity equations for the Friedmann-Lema\^itre-Robertson-Walker
metric. We use an ansatz to reduce the gravitational equations to an ordinary
differential equations for function $F=F(G)$. The solution obtained depends on
an arbitrary func... | [
{
"created": "Wed, 20 Mar 2024 18:40:53 GMT",
"version": "v1"
}
] | 2024-03-22 | [
[
"Shubina",
"Maria V.",
""
]
] | In this paper we present a general vacuum solution of the modified Gauss-Bonnet gravity equations for the Friedmann-Lema\^itre-Robertson-Walker metric. We use an ansatz to reduce the gravitational equations to an ordinary differential equations for function $F=F(G)$. The solution obtained depends on an arbitrary functi... |
1711.01337 | Carlos A. Batista da S. Filho | Carlos Batista | On Spaces with the Maximal Number of Conformal Killing Vectors | 13 pages | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is natural to expect and simple to prove that every conformally flat space
possess the maximal number of conformal Killing vector fields (CKVs). On the
other hand, it is interesting to ask whether the converse is true. Is conformal
flatness a necessary condition for the existence of the maximal number of CKVs?
In ... | [
{
"created": "Fri, 3 Nov 2017 21:21:07 GMT",
"version": "v1"
}
] | 2017-11-07 | [
[
"Batista",
"Carlos",
""
]
] | It is natural to expect and simple to prove that every conformally flat space possess the maximal number of conformal Killing vector fields (CKVs). On the other hand, it is interesting to ask whether the converse is true. Is conformal flatness a necessary condition for the existence of the maximal number of CKVs? In th... |
2201.00023 | Paolo Pani | Swetha Bhagwat, Costantino Pacilio, Enrico Barausse, Paolo Pani | The landscape of massive black-hole spectroscopy with LISA and Einstein
Telescope | 19 pages, 10 figures | null | 10.1103/PhysRevD.105.124063 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Measuring the quasi-normal mode~(QNM) spectrum emitted by a perturbed
black-hole~(BH) --~also known as BH spectroscopy~-- provides an excellent
opportunity to test the predictions of general relativity in the strong-gravity
regime. We investigate the prospects and precision of BH spectroscopy in
massive binary black ... | [
{
"created": "Fri, 31 Dec 2021 19:00:06 GMT",
"version": "v1"
}
] | 2022-11-09 | [
[
"Bhagwat",
"Swetha",
""
],
[
"Pacilio",
"Costantino",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Pani",
"Paolo",
""
]
] | Measuring the quasi-normal mode~(QNM) spectrum emitted by a perturbed black-hole~(BH) --~also known as BH spectroscopy~-- provides an excellent opportunity to test the predictions of general relativity in the strong-gravity regime. We investigate the prospects and precision of BH spectroscopy in massive binary black ho... |
1212.5028 | H{\aa}kan Andr\'easson | H{\aa}kan Andr\'easson, Markus Kunze and Gerhard Rein | Rotating, stationary, axially symmetric spacetimes with collisionless
matter | 29 pages. arXiv admin note: substantial text overlap with
arXiv:1006.1225 | Commun. Math. Phys. 329, 787-808 (2014) | 10.1007/s00220-014-1904-5 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of stationary solutions to the Einstein-Vlasov system which are
axially symmetric and have non-zero total angular momentum is shown. This
provides mathematical models for rotating, general relativistic and
asymptotically flat non-vacuum spacetimes. If angular momentum is allowed to be
non-zero, the syst... | [
{
"created": "Thu, 20 Dec 2012 13:36:38 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Andréasson",
"Håkan",
""
],
[
"Kunze",
"Markus",
""
],
[
"Rein",
"Gerhard",
""
]
] | The existence of stationary solutions to the Einstein-Vlasov system which are axially symmetric and have non-zero total angular momentum is shown. This provides mathematical models for rotating, general relativistic and asymptotically flat non-vacuum spacetimes. If angular momentum is allowed to be non-zero, the system... |
1807.07199 | Yen-Kheng Lim | Yen-Kheng Lim | Electric/magnetic universe with a cosmological constant | 21 pages, 2 figures. References added and typos corrected | Phys. Rev. D 98, 084022 (2018) | 10.1103/PhysRevD.98.084022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A spacetime consisting of parallel electric/magnetic fields held together by
its own gravity in the presence of a cosmological constant $\Lambda$ is derived
as a limit of the de Sitter/anti-de Sitter C-metric. The limiting procedure is
similar to the $\Lambda=0$ case where the Melvin universe is derived from the
C-me... | [
{
"created": "Thu, 19 Jul 2018 00:41:50 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2018 01:44:25 GMT",
"version": "v2"
}
] | 2018-10-17 | [
[
"Lim",
"Yen-Kheng",
""
]
] | A spacetime consisting of parallel electric/magnetic fields held together by its own gravity in the presence of a cosmological constant $\Lambda$ is derived as a limit of the de Sitter/anti-de Sitter C-metric. The limiting procedure is similar to the $\Lambda=0$ case where the Melvin universe is derived from the C-metr... |
2407.21326 | Ariadna Montiel | Elda Guzman-Herrera, Ariadna Montiel and Nora Breton | Comparative of light propagation in Born-Infeld, Euler-Heisenberg and
ModMax nonlinear electrodynamics | 19 pages, 7 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare light propagation through an intense electromagnetic background as
described by three different nonlinear electrodynamics: Born-Infeld (BI),
Euler-Heisenberg (EH), and Modified Maxwell (MM). We use the concept of
effective metric to determine the phase velocities of a propagating wave from
the BI and EH no... | [
{
"created": "Wed, 31 Jul 2024 04:20:16 GMT",
"version": "v1"
}
] | 2024-08-01 | [
[
"Guzman-Herrera",
"Elda",
""
],
[
"Montiel",
"Ariadna",
""
],
[
"Breton",
"Nora",
""
]
] | We compare light propagation through an intense electromagnetic background as described by three different nonlinear electrodynamics: Born-Infeld (BI), Euler-Heisenberg (EH), and Modified Maxwell (MM). We use the concept of effective metric to determine the phase velocities of a propagating wave from the BI and EH nonl... |
2207.05406 | Leihua Liu | Lei-Hua Liu, Mian Zhu, Wentao Luo, Yi-Fu Cai, Yi Wang | Microlensing effect of charged spherically symmetric wormhole | 10 pages, 9 figures | Phys. Rev. D 107, 024022(2023) | 10.1103/PhysRevD.107.024022 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We systematically investigate the microlensing effect of charged spherically
symmetric wormhole, where the light source is remote from the throat.
Remarkably, there will be at most three images by considering the charge part.
We study all situations including three images, two images, and one image,
respectively. The... | [
{
"created": "Tue, 12 Jul 2022 09:12:37 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2022 02:35:39 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Sep 2022 01:24:51 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Jan 2023 02:39:38 GMT",
"version": "v4"
}
] | 2023-01-23 | [
[
"Liu",
"Lei-Hua",
""
],
[
"Zhu",
"Mian",
""
],
[
"Luo",
"Wentao",
""
],
[
"Cai",
"Yi-Fu",
""
],
[
"Wang",
"Yi",
""
]
] | We systematically investigate the microlensing effect of charged spherically symmetric wormhole, where the light source is remote from the throat. Remarkably, there will be at most three images by considering the charge part. We study all situations including three images, two images, and one image, respectively. The n... |
1108.1801 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Membrane paradigm and entropy of black holes in the Euclidean action
approach | 13 pages | Phys.Rev.D84:064017,2011 | 10.1103/PhysRevD.84.064017 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The membrane paradigm approach to black holes fixes in the vicinity of the
event horizon a fictitious surface, the stretched horizon, so that the
spacetime outside remains unchanged and the spacetime inside is vacuum. Using
this powerful method, several black hole properties have been found and
settled, such as the h... | [
{
"created": "Mon, 8 Aug 2011 20:00:15 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | The membrane paradigm approach to black holes fixes in the vicinity of the event horizon a fictitious surface, the stretched horizon, so that the spacetime outside remains unchanged and the spacetime inside is vacuum. Using this powerful method, several black hole properties have been found and settled, such as the hor... |
2311.09281 | Hiroki Takeda | Hiroki Takeda, Shinji Tsujikawa, Atsushi Nishizawa | Gravitational-wave constraints on scalar-tensor gravity from a neutron
star and black-hole binary GW200115 | 31 pages, 11 figures, published in Phys. Rev. D | null | null | LIGO-P2300395-v2 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In nonminimally coupled theories where a scalar field is coupled to the Ricci
scalar, neutron stars (NSs) can have scalar charges through an interaction with
matter mediated by gravity. On the other hand, the same theories do not give
rise to hairy black hole (BH) solutions. The observations of gravitational
waves (G... | [
{
"created": "Wed, 15 Nov 2023 19:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2024 13:22:55 GMT",
"version": "v2"
}
] | 2024-05-28 | [
[
"Takeda",
"Hiroki",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Nishizawa",
"Atsushi",
""
]
] | In nonminimally coupled theories where a scalar field is coupled to the Ricci scalar, neutron stars (NSs) can have scalar charges through an interaction with matter mediated by gravity. On the other hand, the same theories do not give rise to hairy black hole (BH) solutions. The observations of gravitational waves (GWs... |
0909.4413 | Carlos A. R. Herdeiro | Flavio S. Coelho and Carlos A. R. Herdeiro | Relativistic Euler's 3-body problem, optical geometry and the golden
ratio | 16 pages, 8 figures | Phys.Rev.D80:104036,2009 | 10.1103/PhysRevD.80.104036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Weyl solution describing two Schwarzschild black holes is considered. We
focus on the Z_2 invariant solution, with ADM mass M_{ADM}=2M_K, where M_K is
the Komar mass of each black hole. For this solution the set of fixed points of
the discrete symmetry is a totally geodesic sub-manifold. The existence and
radii of ... | [
{
"created": "Thu, 24 Sep 2009 11:09:32 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Coelho",
"Flavio S.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
]
] | A Weyl solution describing two Schwarzschild black holes is considered. We focus on the Z_2 invariant solution, with ADM mass M_{ADM}=2M_K, where M_K is the Komar mass of each black hole. For this solution the set of fixed points of the discrete symmetry is a totally geodesic sub-manifold. The existence and radii of ci... |
2009.00284 | Yuri Obukhov | Yuri N. Obukhov | Generalized Birkhoff theorem in the Poincar\'e gauge gravity theory | 17 pages, Revtex style, minor corrections, references added | Phys. Rev. D 102, 104059 (2020) | 10.1103/PhysRevD.102.104059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of the validity of Birkhoff's theorem about the uniqueness of
the spherically symmetric solution of the gravitational field equations is
extended to the framework of the Poincar\'e gauge gravity theory. The class of
models with the most general Lagrangians of the Yang-Mills type constructed
from all poss... | [
{
"created": "Tue, 1 Sep 2020 08:19:50 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Nov 2020 14:03:33 GMT",
"version": "v2"
}
] | 2020-11-24 | [
[
"Obukhov",
"Yuri N.",
""
]
] | The analysis of the validity of Birkhoff's theorem about the uniqueness of the spherically symmetric solution of the gravitational field equations is extended to the framework of the Poincar\'e gauge gravity theory. The class of models with the most general Lagrangians of the Yang-Mills type constructed from all possib... |
2108.05498 | Muhammad Zaeem-Ul-Haq Bhatti | M. Z. Bhatti, Z. Yousaf, Z. Tariq | Influence of Electromagnetic Field on Hyperbolically Symmetric Source | 23 pages, version accepted for publication in European Physical
Journal Plus | Eur. Phys. J. Plus 136, 857 (2021) | 10.1140/epjp/s13360-021-01866-2 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We pursue a coherent analysis of hyperbolically symmetric static sources by
extending the work of Herrera \cite{26} to the case of electromagnetic field.
We deeply analyze the impact of such a force on the physical characteristics of
the hyperbolically symmetric spacetime under consideration. Setting off the
Einstein... | [
{
"created": "Thu, 12 Aug 2021 02:27:07 GMT",
"version": "v1"
}
] | 2021-08-30 | [
[
"Bhatti",
"M. Z.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Tariq",
"Z.",
""
]
] | We pursue a coherent analysis of hyperbolically symmetric static sources by extending the work of Herrera \cite{26} to the case of electromagnetic field. We deeply analyze the impact of such a force on the physical characteristics of the hyperbolically symmetric spacetime under consideration. Setting off the Einstein's... |
2209.02537 | Stephen Adler | Stephen L. Adler | Dynamical Gravastars | 25 pages 10 figures. See https://gitlab.com/stephenadler/Gravastar
for the Mathematica notebooks. See arXiv:2301.11821 for further graphs. See
https://community.wolfram.com/groups/-/m/t/2820793 for a simplified and
annotated notebook | Phys Rev D 106, 104061 (2022) | null | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We combine the ideas of a Weyl scaling invariant dark energy action, which
eliminates black hole horizons, with the ``gravastar'' idea of a jump in the
hole interior from a normal matter equation of state to an equation of state
where pressure plus density approximately sum to zero. Using the
Tolman-Oppenheimer-Volko... | [
{
"created": "Tue, 6 Sep 2022 14:38:54 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2022 19:26:11 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Oct 2022 11:46:29 GMT",
"version": "v3"
},
{
"created": "Sun, 23 Oct 2022 11:03:37 GMT",
"version": "v4"
},
{
"cre... | 2023-02-22 | [
[
"Adler",
"Stephen L.",
""
]
] | We combine the ideas of a Weyl scaling invariant dark energy action, which eliminates black hole horizons, with the ``gravastar'' idea of a jump in the hole interior from a normal matter equation of state to an equation of state where pressure plus density approximately sum to zero. Using the Tolman-Oppenheimer-Volkoff... |
1202.3629 | Sergio Mendoza | S. Mendoza, T. Bernal, J.C. Hidalgo, S. Capozziello | MOND as the weak-field limit of an extended metric theory of gravity | To appear in the proceedings of the 2011 Spanish Relativity Meeting
(ERE2011) held in Madrid, Spain, 4 pages | null | 10.1063/1.4734465 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Modified Newtonian Dynamics (MOND) regime can be fully
recovered as the weak-field limit of a particular theory of gravity formulated
in the metric approach. This is possible when Milgrom's acceleration constant
is taken as a fundamental quantity which couples to the theory in a very
consistent manne... | [
{
"created": "Thu, 16 Feb 2012 15:54:23 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Mendoza",
"S.",
""
],
[
"Bernal",
"T.",
""
],
[
"Hidalgo",
"J. C.",
""
],
[
"Capozziello",
"S.",
""
]
] | We show that the Modified Newtonian Dynamics (MOND) regime can be fully recovered as the weak-field limit of a particular theory of gravity formulated in the metric approach. This is possible when Milgrom's acceleration constant is taken as a fundamental quantity which couples to the theory in a very consistent manner.... |
2001.08260 | Masoud Ghezelbash | M. F. A. R. Sakti, A. M. Ghezelbash, A. Suroso, F. P. Zen | Hidden conformal symmetry for Kerr-Newman-NUT-AdS black holes | 20 pages | Nucl. Phys. B 953, 114970 (2020) | 10.1016/j.nuclphysb.2020.114970 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show the generic non-extremal Kerr-Newman-NUT-AdS black holes are
holographically dual to the hidden conformal field theories in two different
pictures. The two pictures can be merged together to the dual CFTs in general
picture, that are generated by the $SL(2,\mathbb{Z})$ modular group. We also
extend the calcul... | [
{
"created": "Wed, 22 Jan 2020 20:19:56 GMT",
"version": "v1"
}
] | 2021-07-13 | [
[
"Sakti",
"M. F. A. R.",
""
],
[
"Ghezelbash",
"A. M.",
""
],
[
"Suroso",
"A.",
""
],
[
"Zen",
"F. P.",
""
]
] | We show the generic non-extremal Kerr-Newman-NUT-AdS black holes are holographically dual to the hidden conformal field theories in two different pictures. The two pictures can be merged together to the dual CFTs in general picture, that are generated by the $SL(2,\mathbb{Z})$ modular group. We also extend the calculat... |
gr-qc/9708041 | Gianni Landi | Giovanni Landi, Carlo Rovelli | Gravity from Dirac Eigenvalues | An enlarged and improved version which will be pubblished in Mod.
Phys. Lett. A | Mod.Phys.Lett. A13 (1998) 479-494 | 10.1142/S0217732398000541 | null | gr-qc | null | We study a formulation of euclidean general relativity in which the dynamical
variables are given by a sequence of real numbers $\lambda_{n}$, representing
the eigenvalues of the Dirac operator on the curved spacetime. These quantities
are diffeomorphism-invariant functions of the metric and they form an infinite
set... | [
{
"created": "Tue, 19 Aug 1997 14:24:54 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 1998 10:42:38 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Landi",
"Giovanni",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We study a formulation of euclidean general relativity in which the dynamical variables are given by a sequence of real numbers $\lambda_{n}$, representing the eigenvalues of the Dirac operator on the curved spacetime. These quantities are diffeomorphism-invariant functions of the metric and they form an infinite set o... |
2006.11125 | Junji Jia | Haotian Liu and Junji Jia | Constraining the spacetime spin using time delay in stationary
axisymmetric spacetimes | 20 pages, 4 figures, to match the published version | null | 10.1140/epjc/s10052-020-08496-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Total travel time $t$ and time delay $\Delta t$ between images of
gravitational lensing (GL) in the equatorial plane of stationary axisymmetric
(SAS) spacetimes for null and timelike signals with arbitrary velocity are
studied. Using a perturbative method in the weak field limit, $t$ in general
SAS spacetimes is expr... | [
{
"created": "Fri, 19 Jun 2020 13:29:12 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 2020 07:00:17 GMT",
"version": "v2"
}
] | 2020-10-28 | [
[
"Liu",
"Haotian",
""
],
[
"Jia",
"Junji",
""
]
] | Total travel time $t$ and time delay $\Delta t$ between images of gravitational lensing (GL) in the equatorial plane of stationary axisymmetric (SAS) spacetimes for null and timelike signals with arbitrary velocity are studied. Using a perturbative method in the weak field limit, $t$ in general SAS spacetimes is expres... |
1212.1571 | Farhad Darabi | K. Zeynali, F. Darabi, H. Motavalli | Multi-Dimensional Cosmology and DSR-GUP | 12 pages, minor revision, To be published in MPLA. arXiv admin note:
text overlap with arXiv:hep-th/0608011 by other authors | MPLA, 28, (2013) 1350047 | 10.1142/S0217732313500478 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A multidimensional cosmology with FRW type metric having 4-dimensional
space-time and $d$-dimensional Ricci-flat internal space is considered with a
higher dimensional cosmological constant. The classical cosmology in
commutative and DSR-GUP contexts is studied and the corresponding exact
solutions for negative and p... | [
{
"created": "Fri, 7 Dec 2012 10:11:36 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Apr 2013 09:20:27 GMT",
"version": "v2"
}
] | 2013-04-25 | [
[
"Zeynali",
"K.",
""
],
[
"Darabi",
"F.",
""
],
[
"Motavalli",
"H.",
""
]
] | A multidimensional cosmology with FRW type metric having 4-dimensional space-time and $d$-dimensional Ricci-flat internal space is considered with a higher dimensional cosmological constant. The classical cosmology in commutative and DSR-GUP contexts is studied and the corresponding exact solutions for negative and pos... |
2210.12769 | Donald Salisbury | Donald Salisbury | A new approach to classical Einstein-Yang-Mills Theory | To be published in Particles, Fields and Topology: Celebrating A.P.
Balachandran, a Festschrift volume for A.P. Balachandran | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The conventional Rosenfeld-Bergmann-Dirac constrained Hamiltonian algorithm
applied to Einstein-Yang-Mills theory is shown to be equivalent to a local
gauge theoretic extension of Cartan's invariant integral approach to classical
mechanics. In addition, the Hamiltonian generators of Legendre-projectable
spacetime dif... | [
{
"created": "Sun, 23 Oct 2022 16:27:05 GMT",
"version": "v1"
}
] | 2022-10-25 | [
[
"Salisbury",
"Donald",
""
]
] | The conventional Rosenfeld-Bergmann-Dirac constrained Hamiltonian algorithm applied to Einstein-Yang-Mills theory is shown to be equivalent to a local gauge theoretic extension of Cartan's invariant integral approach to classical mechanics. In addition, the Hamiltonian generators of Legendre-projectable spacetime diffe... |
1201.1390 | Luis Herrera | L. Herrera, A. Di Prisco and J. Iba\~nez | Reversible Dissipative Processes, Conformal Motions and Landau Damping | 3 pages Revtex. To appear in Phys. Lett. A | Physics Letters A 376 (2012), pp. 899-900 | 10.1016/j.physleta.2012.01.003 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of a dissipative flux vector is known to be compatible with
reversible processes, provided a timelike conformal Killing vector (CKV)
$\chi^\alpha=\frac{V^\alpha}{T}$ (where $V^\alpha$ and $T$ denote the
four-velocity and temperature respectively) is admitted by the space-time. Here
we show that if a con... | [
{
"created": "Fri, 6 Jan 2012 11:13:30 GMT",
"version": "v1"
}
] | 2012-02-13 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ibañez",
"J.",
""
]
] | The existence of a dissipative flux vector is known to be compatible with reversible processes, provided a timelike conformal Killing vector (CKV) $\chi^\alpha=\frac{V^\alpha}{T}$ (where $V^\alpha$ and $T$ denote the four-velocity and temperature respectively) is admitted by the space-time. Here we show that if a const... |
1101.1274 | Alexey Zinger | S. G. Rubin, A. S. Zinger | The universe formation by a space reduction cascade with random initial
parameters | 17 pages, 1 figure | Gen.Relativ.Gravit 44:2283,2012 | 10.1007/s10714-012-1389-5 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the creation of our universe using the idea of extra
dimensions. The initial, multidimensional Lagrangian contains only metric
tensor. We have found many sets of the numerical values of the Lagrangian
parameters corresponding to the observed low-energy physics of our universe.
Different initi... | [
{
"created": "Thu, 6 Jan 2011 18:57:52 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Jan 2012 18:50:54 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Rubin",
"S. G.",
""
],
[
"Zinger",
"A. S.",
""
]
] | In this paper we discuss the creation of our universe using the idea of extra dimensions. The initial, multidimensional Lagrangian contains only metric tensor. We have found many sets of the numerical values of the Lagrangian parameters corresponding to the observed low-energy physics of our universe. Different initial... |
1407.6273 | Oleg Evnin | Ben Craps, Oleg Evnin and Joris Vanhoof | Renormalization group, secular term resummation and AdS (in)stability | v2: 32 pages, substantial comments added, references added, minor
typos corrected | JHEP 10 (2014) 48 | 10.1007/JHEP10(2014)048 | null | gr-qc hep-th nlin.CD | http://creativecommons.org/licenses/by-nc-sa/3.0/ | We revisit the issues of non-linear AdS stability, its relation to growing
(secular) terms in naive perturbation theory around the AdS background, and the
need and possible strategies for resumming such terms. To this end, we review a
powerful and elegant resummation method, which is mathematically identical to
the s... | [
{
"created": "Wed, 23 Jul 2014 15:50:19 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Aug 2014 09:17:34 GMT",
"version": "v2"
}
] | 2014-10-15 | [
[
"Craps",
"Ben",
""
],
[
"Evnin",
"Oleg",
""
],
[
"Vanhoof",
"Joris",
""
]
] | We revisit the issues of non-linear AdS stability, its relation to growing (secular) terms in naive perturbation theory around the AdS background, and the need and possible strategies for resumming such terms. To this end, we review a powerful and elegant resummation method, which is mathematically identical to the sta... |
2103.00171 | Sanjay Mandal | Sanjay Mandal, Abhishek Parida, P.K. Sahoo | Observational constraints and some toy models in $f(Q)$ gravity with
bulk viscous fluid | Universe accepted version | Universe, 8(4) (2022) 240 | 10.3390/universe8040240 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The standard formulation of general relativity fails to describe some recent
interests in the universe. It impels us to go beyond the standard formulation
of gravity. The $f(Q)$ gravity theory is an interesting modified theory of
gravity, where the gravitational interaction is driven by the nonmetricity $Q$.
This stu... | [
{
"created": "Sat, 27 Feb 2021 10:17:02 GMT",
"version": "v1"
},
{
"created": "Thu, 27 May 2021 15:34:17 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jul 2021 09:42:36 GMT",
"version": "v3"
},
{
"created": "Mon, 24 Jan 2022 10:26:08 GMT",
"version": "v4"
},
{
"c... | 2022-04-14 | [
[
"Mandal",
"Sanjay",
""
],
[
"Parida",
"Abhishek",
""
],
[
"Sahoo",
"P. K.",
""
]
] | The standard formulation of general relativity fails to describe some recent interests in the universe. It impels us to go beyond the standard formulation of gravity. The $f(Q)$ gravity theory is an interesting modified theory of gravity, where the gravitational interaction is driven by the nonmetricity $Q$. This study... |
1711.04744 | Gerry McKeon Dr. | D.G.C. McKeon | Radiative Corrections in 2+1 Dimensional Supergravity | null | null | 10.1139/cjp-2017-0928 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Supergravity in 2+1 dimensions has a set of first class constraints that
result in two Bosonic and one Fermionic gauge invariances. When one uses
Faddeev-Popov quantization, these gauge invariances result in four Fermionic
scalar ghosts and two Bosonic Majorana spinor ghosts. The BRST invariance of
the effective Lagr... | [
{
"created": "Mon, 13 Nov 2017 18:26:11 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2018 20:41:39 GMT",
"version": "v2"
}
] | 2018-12-26 | [
[
"McKeon",
"D. G. C.",
""
]
] | Supergravity in 2+1 dimensions has a set of first class constraints that result in two Bosonic and one Fermionic gauge invariances. When one uses Faddeev-Popov quantization, these gauge invariances result in four Fermionic scalar ghosts and two Bosonic Majorana spinor ghosts. The BRST invariance of the effective Lagran... |
0707.2676 | Frank Witte | I. Sturm and F.M.C. Witte | Groundstate splitting around rotating mini Blackholes | 10 pages submitted for publication as Letter | null | null | null | gr-qc astro-ph | null | In this letter we present the result of a spin-dependent groundstate-energy
calculation for fermionic boundstates in the spacetime around a rotating
blackhole. Using a slow rotation approximation and a minimax variational
approach we find boundstate energies of 0 to 5 percent of the fermions
flatspace restmass. The g... | [
{
"created": "Wed, 18 Jul 2007 08:51:52 GMT",
"version": "v1"
}
] | 2007-07-19 | [
[
"Sturm",
"I.",
""
],
[
"Witte",
"F. M. C.",
""
]
] | In this letter we present the result of a spin-dependent groundstate-energy calculation for fermionic boundstates in the spacetime around a rotating blackhole. Using a slow rotation approximation and a minimax variational approach we find boundstate energies of 0 to 5 percent of the fermions flatspace restmass. The gro... |
gr-qc/0407004 | Robert T. Jantzen | Donato Bini, Christian Cherubini, Gianluca Cruciani, Robert T. Jantzen | Geometric transport along circular orbits in stationary axisymmetric
spacetimes | 33 pages ijmpd latex article with 24 eps figures | Int.J.Mod.Phys. D13 (2004) 1771-1804 | 10.1142/S0218271804005237 | null | gr-qc | null | Parallel transport along circular orbits in orthogonally transitive
stationary axisymmetric spacetimes is described explicitly relative to Lie
transport in terms of the electric and magnetic parts of the induced
connection. The influence of both the gravitoelectromagnetic fields associated
with the zero angular momen... | [
{
"created": "Thu, 1 Jul 2004 13:14:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Cruciani",
"Gianluca",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | Parallel transport along circular orbits in orthogonally transitive stationary axisymmetric spacetimes is described explicitly relative to Lie transport in terms of the electric and magnetic parts of the induced connection. The influence of both the gravitoelectromagnetic fields associated with the zero angular momentu... |
2405.05377 | Gabriel S\'anchez-P\'erez | Marc Mars and Gabriel S\'anchez-P\'erez | Transverse expansion of the metric at null hypersurfaces I. Uniqueness
and application to Killing horizons | 42 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the first in a series of two papers where we analyze the transverse
expansion of the metric on a general null hypersurface. In this paper we obtain
general geometric identities relating the transverse derivatives of the ambient
Ricci tensor and the transverse expansion of the metric at the null
hypersurface. ... | [
{
"created": "Wed, 8 May 2024 19:07:28 GMT",
"version": "v1"
}
] | 2024-05-10 | [
[
"Mars",
"Marc",
""
],
[
"Sánchez-Pérez",
"Gabriel",
""
]
] | This is the first in a series of two papers where we analyze the transverse expansion of the metric on a general null hypersurface. In this paper we obtain general geometric identities relating the transverse derivatives of the ambient Ricci tensor and the transverse expansion of the metric at the null hypersurface. We... |
2001.05010 | Jorge Russo | Jorge G. Russo | Displaced orbits and electric-magnetic black hole binaries | 10 pages, 5 figures. Final version appeared in Class.Quant.Grav. 37
(2020) 17, 175004 | Class.Quant.Grav. 37 (2020) 17, 175004 | 10.1088/1361-6382/aba17e | ICCUB-20-004 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In presence of magnetic fields, the orbits of charged particles can be
displaced from the equatorial plane. We study circular orbits of electrically
charged massive objects around a magnetic black hole in the probe
approximation. We show that there exist a one-parameter family of circular
orbits at constant polar ang... | [
{
"created": "Tue, 14 Jan 2020 19:11:51 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jan 2020 17:19:46 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Aug 2020 07:51:33 GMT",
"version": "v3"
}
] | 2020-08-26 | [
[
"Russo",
"Jorge G.",
""
]
] | In presence of magnetic fields, the orbits of charged particles can be displaced from the equatorial plane. We study circular orbits of electrically charged massive objects around a magnetic black hole in the probe approximation. We show that there exist a one-parameter family of circular orbits at constant polar angle... |
0902.1131 | Spyros Alexakis | Spyros Alexakis | Unique continuation for the vacuum Einstein equations | updated version | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a unique continuation theorem for the vacuum Einstein equations.
Our method of proof utilizes Carleman estimates (most importantly one obtained
recently by Ionescu and Klainerman), but also relies strongly on certain
geometric gauge constructions which make it possible to address this problem
via such estim... | [
{
"created": "Fri, 6 Feb 2009 16:24:32 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Sep 2009 18:05:12 GMT",
"version": "v2"
}
] | 2009-09-02 | [
[
"Alexakis",
"Spyros",
""
]
] | We derive a unique continuation theorem for the vacuum Einstein equations. Our method of proof utilizes Carleman estimates (most importantly one obtained recently by Ionescu and Klainerman), but also relies strongly on certain geometric gauge constructions which make it possible to address this problem via such estimat... |
gr-qc/0307010 | Gagab Gad | Ragab M. Gad (Minia University) | Energy Distribution of a Stationary Beam of Light | Latex, no figures [Admin note: substantial overlap with gr-qc/9910015
and hep-th/0308070] | Astrophys.Space Sci. 295 (2005) 451-458 | 10.1007/s10509-005-1194-7 | null | gr-qc | null | Aguirregabiria et al showed that Einstein, Landau and Lifshitz, Papapetrou,
and Weinberg energy-momentum complexes coincide for all Kerr-Schild metric.
Bringely used their general expression of the Kerr-Schild class and found
energy and momentum densities for the Bonnor metric. We obtain these results
without using A... | [
{
"created": "Thu, 3 Jul 2003 03:39:44 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Gad",
"Ragab M.",
"",
"Minia University"
]
] | Aguirregabiria et al showed that Einstein, Landau and Lifshitz, Papapetrou, and Weinberg energy-momentum complexes coincide for all Kerr-Schild metric. Bringely used their general expression of the Kerr-Schild class and found energy and momentum densities for the Bonnor metric. We obtain these results without using Agu... |
0807.2000 | Yungui Gong | Yungui Gong and Jie Liu | Non-existence of Extended Holographic Dark Energy with Hubble Horizon | 12 pages with revtex, 4 figures, v2: minor corrections to match the
version appeared in JCAP | JCAP 0809:010,2008 | 10.1088/1475-7516/2008/09/010 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extended holographic dark energy model with the Hubble horizon as the
infrared cutoff avoids the problem of the circular reasoning of the holographic
dark energy model. We show that the infrared cutoff of the extended holographic
dark energy model cannot be the Hubble horizon provided that the Brans-Dicke
paramet... | [
{
"created": "Mon, 14 Jul 2008 07:33:44 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 2008 10:29:34 GMT",
"version": "v2"
}
] | 2009-02-09 | [
[
"Gong",
"Yungui",
""
],
[
"Liu",
"Jie",
""
]
] | The extended holographic dark energy model with the Hubble horizon as the infrared cutoff avoids the problem of the circular reasoning of the holographic dark energy model. We show that the infrared cutoff of the extended holographic dark energy model cannot be the Hubble horizon provided that the Brans-Dicke parameter... |
2005.03026 | Yonadav Barry Ginat | Yonadav Barry Ginat | Multiple-Scales Approach to The Averaging Problem in Cosmology | (V1) Submitted for publication. Comment welcome. (V4) Version
accepted for publication in JCAP. Major update relative to earlier versions | null | 10.1088/1475-7516/2021/02/049 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Universe is homogeneous and isotropic on large scales, so on those scales
it is usually modelled as a Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW)
space-time. The non-linearity of the Einstein field equations raises concern
over averaging over small-scale deviations form homogeneity and isotropy, with
possible ... | [
{
"created": "Wed, 6 May 2020 18:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 2020 10:46:00 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Jul 2020 11:06:20 GMT",
"version": "v3"
},
{
"created": "Thu, 17 Dec 2020 11:19:22 GMT",
"version": "v4"
}
] | 2021-03-03 | [
[
"Ginat",
"Yonadav Barry",
""
]
] | The Universe is homogeneous and isotropic on large scales, so on those scales it is usually modelled as a Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) space-time. The non-linearity of the Einstein field equations raises concern over averaging over small-scale deviations form homogeneity and isotropy, with possible im... |
1511.03900 | Malte F. Linder | Malte F. Linder, Ralf Sch\"utzhold, William G. Unruh | Derivation of Hawking radiation in dispersive dielectric media | 16 pages REVTeX, 10 (sub)figures | Phys. Rev. D 93, 104010 (2016) | 10.1103/PhysRevD.93.104010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent experimental efforts, we study a black hole analog
induced by the propagation of a strong laser pulse in a nonlinear dielectric
medium. Based on the Hopfield model (one pair of Sellmeier coefficients), we
perform an analytic and fully relativistic microscopic derivation of the analog
of Hawking ra... | [
{
"created": "Thu, 12 Nov 2015 13:58:33 GMT",
"version": "v1"
},
{
"created": "Fri, 6 May 2016 13:01:04 GMT",
"version": "v2"
}
] | 2016-05-09 | [
[
"Linder",
"Malte F.",
""
],
[
"Schützhold",
"Ralf",
""
],
[
"Unruh",
"William G.",
""
]
] | Motivated by recent experimental efforts, we study a black hole analog induced by the propagation of a strong laser pulse in a nonlinear dielectric medium. Based on the Hopfield model (one pair of Sellmeier coefficients), we perform an analytic and fully relativistic microscopic derivation of the analog of Hawking radi... |
2001.11387 | Malcolm MacCallum | M.A.H. MacCallum | Cosmological models from a geometric point of view | These notes have been widely cited, but were not readily available.
The copyright is held by Taylor and Francis who now own Gordon and Breach and
whose permission must be sought for any uses demanding copyright. They have
given permission for posting to archives, for which I am grateful, saying
"Given that the ... | Carg\`ese Lectures in Physics, vol.6, ed. E. Schatzman, pages
61-174. Gordon and Breach, New York (1973) | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | (There is no original abstract.) These are lecture notes from a 1971 summer
school surveying the then known cosmological models in particular the
properties of Bianchi cosmologies, and giving a pedagogical introduction to
groups of isometries in spacetime and to the orthonormal tetrad method.
| [
{
"created": "Thu, 30 Jan 2020 15:17:29 GMT",
"version": "v1"
}
] | 2020-01-31 | [
[
"MacCallum",
"M. A. H.",
""
]
] | (There is no original abstract.) These are lecture notes from a 1971 summer school surveying the then known cosmological models in particular the properties of Bianchi cosmologies, and giving a pedagogical introduction to groups of isometries in spacetime and to the orthonormal tetrad method. |
2010.13726 | Jan Harms | Jan Harms, Filippo Ambrosino, Lorella Angelini, Valentina Braito,
Marica Branchesi, Enzo Brocato, Enrico Cappellaro, Eugenio Coccia, Michael
Coughlin, Roberto Della Ceca, Massimo Della Valle, Cesare Dionisio, Costanzo
Federico, Michelangelo Formisano, Alessandro Frigeri, Aniello Grado, Luca
Izzo, Augusto Marcel... | Lunar Gravitational-Wave Antenna | 29 pages, 17 figures | null | 10.3847/1538-4357/abe5a7 | null | gr-qc astro-ph.EP astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Monitoring of vibrational eigenmodes of an elastic body excited by
gravitational waves was one of the first concepts proposed for the detection of
gravitational waves. At laboratory scale, these experiments became known as
resonant-bar detectors first developed by Joseph Weber in the 1960s. Due to the
dimensions of t... | [
{
"created": "Mon, 26 Oct 2020 17:08:28 GMT",
"version": "v1"
}
] | 2021-03-31 | [
[
"Harms",
"Jan",
""
],
[
"Ambrosino",
"Filippo",
""
],
[
"Angelini",
"Lorella",
""
],
[
"Braito",
"Valentina",
""
],
[
"Branchesi",
"Marica",
""
],
[
"Brocato",
"Enzo",
""
],
[
"Cappellaro",
"Enrico",
""
]... | Monitoring of vibrational eigenmodes of an elastic body excited by gravitational waves was one of the first concepts proposed for the detection of gravitational waves. At laboratory scale, these experiments became known as resonant-bar detectors first developed by Joseph Weber in the 1960s. Due to the dimensions of the... |
2105.13312 | Martin Kr\v{s}\v{s}\'ak | E. D. Emtsova, M. Kr\v{s}\v{s}\'ak, A. N. Petrov, A. V. Toporensky | On Conserved Quantities for the Schwarzschild Black Hole in Teleparallel
Gravity | 39 pages | Eur. Phys. J. C 81 (2021) 743 | 10.1140/epjc/s10052-021-09505-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine various methods of constructing conserved quantities in the
Teleparallel Equivalent of General Relativity (TEGR). We demonstrate that in
the covariant formulation the preferred method are the Noether charges that are
true invariant quantities. The Noether charges depend on the vector field $\xi$
and we con... | [
{
"created": "Thu, 27 May 2021 17:08:12 GMT",
"version": "v1"
}
] | 2021-09-17 | [
[
"Emtsova",
"E. D.",
""
],
[
"Krššák",
"M.",
""
],
[
"Petrov",
"A. N.",
""
],
[
"Toporensky",
"A. V.",
""
]
] | We examine various methods of constructing conserved quantities in the Teleparallel Equivalent of General Relativity (TEGR). We demonstrate that in the covariant formulation the preferred method are the Noether charges that are true invariant quantities. The Noether charges depend on the vector field $\xi$ and we consi... |
1707.02872 | Jose Luis Hernandez-Pastora | L. Herrera and J.L. Hernandez-Pastora | Physical properties of a source of the Kerr metric: Bound on the surface
gravitational potential and conditions for the fragmentation | 10 pages, 6 figures. Some typos corrected. Published in PRD. arXiv
admin note: text overlap with arXiv:1701.02098 | PRD 96, 024048 (2017) | 10.1103/PhysRevD.96.024048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate some important physical aspects of a recently presented
interior solution for the Kerr metric. It is shown that, as in the spherically
symmetric case, there is a specific limit for the maximal value of the surface
potential (degree of compactness), beyond which, unacceptable physical
anomalies appear. ... | [
{
"created": "Fri, 7 Jul 2017 10:33:42 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jul 2017 20:17:18 GMT",
"version": "v2"
}
] | 2017-07-28 | [
[
"Herrera",
"L.",
""
],
[
"Hernandez-Pastora",
"J. L.",
""
]
] | We investigate some important physical aspects of a recently presented interior solution for the Kerr metric. It is shown that, as in the spherically symmetric case, there is a specific limit for the maximal value of the surface potential (degree of compactness), beyond which, unacceptable physical anomalies appear. Su... |
1001.3099 | Chris Van Den Broeck | Chris Van Den Broeck, M. Trias, B.S. Sathyaprakash, and A.M. Sintes | Weak lensing effects in the measurement of the dark energy equation of
state with LISA | 15 pages, many eps figures. Change in title; other minor changes in
response to referees. Matches PRD version | Phys.Rev.D81:124031,2010 | 10.1103/PhysRevD.81.124031 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna's (LISA's) observation of supermassive
binary black holes (SMBBH) could provide a new tool for precision cosmography.
Inclusion of sub-dominant signal harmonics in the inspiral signal allows for
high-accuracy sky localization, dramatically improving the chances of finding
the ho... | [
{
"created": "Mon, 18 Jan 2010 16:29:31 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2010 10:15:07 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Broeck",
"Chris Van Den",
""
],
[
"Trias",
"M.",
""
],
[
"Sathyaprakash",
"B. S.",
""
],
[
"Sintes",
"A. M.",
""
]
] | The Laser Interferometer Space Antenna's (LISA's) observation of supermassive binary black holes (SMBBH) could provide a new tool for precision cosmography. Inclusion of sub-dominant signal harmonics in the inspiral signal allows for high-accuracy sky localization, dramatically improving the chances of finding the host... |
2312.12516 | Jose Beltr\'an Jim\'enez | Bruno J. Barros and Jose Beltr\'an Jim\'enez | Non-trivial thick brane realisations with 3-forms | 13 pages, 1 figure. V2: 22 pages, 1 figure, fixed typos and improved
some discussions | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the construction of four-dimensional thick branes supported by
massless 3-forms in a five-dimensional bulk space. The required residual
Poincar\'e symmetry on the brane is realised as a combination of the bulk
symmetries and the internal gauge symmetry of the 3-form. We show the presence
of a gradient inst... | [
{
"created": "Tue, 19 Dec 2023 19:00:04 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Feb 2024 14:05:06 GMT",
"version": "v2"
}
] | 2024-02-20 | [
[
"Barros",
"Bruno J.",
""
],
[
"Jiménez",
"Jose Beltrán",
""
]
] | We explore the construction of four-dimensional thick branes supported by massless 3-forms in a five-dimensional bulk space. The required residual Poincar\'e symmetry on the brane is realised as a combination of the bulk symmetries and the internal gauge symmetry of the 3-form. We show the presence of a gradient instab... |
gr-qc/0406082 | David Lonie | G.S. Hall and D.P. Lonie | Holonomy and projective symmetry in space-times | LaTex2e, 12 pages | Class.Quant.Grav. 21 (2004) 4549-4556 | 10.1088/0264-9381/21/19/004 | null | gr-qc | null | It is shown using a space-time curvature classification and decomposition
that for certain holonomy types of a space-time, proper projective vector
fields cannot exist. Existence is confirmed, by example, for the remaining
holonomy types. In all except the most general holonomy type, a local
uniqueness theorem for pr... | [
{
"created": "Mon, 21 Jun 2004 08:53:12 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hall",
"G. S.",
""
],
[
"Lonie",
"D. P.",
""
]
] | It is shown using a space-time curvature classification and decomposition that for certain holonomy types of a space-time, proper projective vector fields cannot exist. Existence is confirmed, by example, for the remaining holonomy types. In all except the most general holonomy type, a local uniqueness theorem for prop... |
gr-qc/9302010 | null | Luca Amendola (Rome Astronomical Observatory) | Cosmology with Nonminimal Derivative Couplings | accepted on Physics Letters B, 11 pages, 2 figures available upon
request, LATEX, no preprint number | Phys.Lett. B301 (1993) 175-182 | 10.1016/0370-2693(93)90685-B | null | gr-qc | null | We study a theory which generalizes the nonminimal coupling of matter to
gravity by including derivative couplings. This leads to several interesting
new dynamical phenomena in cosmology. In particular, the range of parameters in
which inflationary attractors exist is greatly expanded. We also numerically
integrate t... | [
{
"created": "Wed, 10 Feb 1993 10:29:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Amendola",
"Luca",
"",
"Rome Astronomical Observatory"
]
] | We study a theory which generalizes the nonminimal coupling of matter to gravity by including derivative couplings. This leads to several interesting new dynamical phenomena in cosmology. In particular, the range of parameters in which inflationary attractors exist is greatly expanded. We also numerically integrate the... |
0706.3245 | Yu-Xiao Liu | Yu-Xiao Liu, Zhen-Hua Zhao, Jie Yang, Yi-Shi Duan | The total energy-momentum of the universe in teleparallel gravity | 14 pages, no figures, V2: 13 pages, section II reorganized | null | null | null | gr-qc | null | We investigate the conservation law of energy-momentum in teleparallel
gravity by using general Noether theorem. The energy-momentum current has also
superpotential and is therefore identically conserved. The total
energy-momentum, which includes the contributions of both matter and
gravitational fields, is given by ... | [
{
"created": "Fri, 22 Jun 2007 01:42:03 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2007 10:31:35 GMT",
"version": "v2"
}
] | 2007-08-27 | [
[
"Liu",
"Yu-Xiao",
""
],
[
"Zhao",
"Zhen-Hua",
""
],
[
"Yang",
"Jie",
""
],
[
"Duan",
"Yi-Shi",
""
]
] | We investigate the conservation law of energy-momentum in teleparallel gravity by using general Noether theorem. The energy-momentum current has also superpotential and is therefore identically conserved. The total energy-momentum, which includes the contributions of both matter and gravitational fields, is given by th... |
2107.03303 | Faizuddin Ahmed | Faizuddin Ahmed | Weyl Fermions in a Linear Class of G\"odel-Type Space-Time Backgrounds | 15 pages, published in Gravitation & Cosmology. arXiv admin note:
text overlap with arXiv:1705.10631 by other authors | Gravit. Cosmol. 27, Issue 2, 120 (2021) | 10.1134/S020228932102002X | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Weyl fermions in a linear class of topologically trivial
G\"odel-type geometries in Einstein's general relativity. We solve the Weyl
equation and evaluate in detail the energy eigenvalues and the corresponding
wave functions.
| [
{
"created": "Mon, 5 Jul 2021 09:39:59 GMT",
"version": "v1"
}
] | 2021-07-08 | [
[
"Ahmed",
"Faizuddin",
""
]
] | We study Weyl fermions in a linear class of topologically trivial G\"odel-type geometries in Einstein's general relativity. We solve the Weyl equation and evaluate in detail the energy eigenvalues and the corresponding wave functions. |
gr-qc/9807025 | Plamen Fiziev | P. Fiziev, S. Yazadjiev | Solar System Experiments and the Interpretation of Saa's Model of
Gravity with Propagating Torsion as a Theory with Variable Plank "Constant" | 6 pages, latex, no figures. Typos corrected | Mod.Phys.Lett. A14 (1999) 511-516 | 10.1142/S0217732399000560 | SU-FzF: 16/98 | gr-qc astro-ph hep-th | null | It is shown that the recently proposed interpretation of the transposed
equi-affine theory of gravity as a theory with variable Plank "constant" is
inconsistent with basic solar system gravitational experiments.
| [
{
"created": "Fri, 10 Jul 1998 18:04:56 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Jul 1998 07:44:41 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Fiziev",
"P.",
""
],
[
"Yazadjiev",
"S.",
""
]
] | It is shown that the recently proposed interpretation of the transposed equi-affine theory of gravity as a theory with variable Plank "constant" is inconsistent with basic solar system gravitational experiments. |
2205.04957 | Sen Guo | Sen Guo, Guan-Ru Li, Guo-Ping Li | Shadow thermodynamics of AdS black hole in regular spacetime | 12 pages, 6 figures | published Chinese Physics C (CPC) 2022 | 10.1088/1674-1137/ac6dc8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dependence of the black hole (BH) shadow and thermodynamics may be
structured in the regular spacetime. Taking the regular Bardeen-AdS BH as an
example, the relationship between the shadow radius and the event horizon
radius is derived. It is found that these two radii display a positive
correlation, implying tha... | [
{
"created": "Tue, 10 May 2022 15:14:54 GMT",
"version": "v1"
}
] | 2022-09-14 | [
[
"Guo",
"Sen",
""
],
[
"Li",
"Guan-Ru",
""
],
[
"Li",
"Guo-Ping",
""
]
] | The dependence of the black hole (BH) shadow and thermodynamics may be structured in the regular spacetime. Taking the regular Bardeen-AdS BH as an example, the relationship between the shadow radius and the event horizon radius is derived. It is found that these two radii display a positive correlation, implying that ... |
2010.07418 | Lydia Bieri | Lydia Bieri | New Structures in Gravitational Radiation | null | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Einstein vacuum equations as well as the Einstein-null
fluid equations describing neutrino radiation. We find new structures in
gravitational waves and memory for asymptotically-flat spacetimes of slow
decay. These structures do not arise in spacetimes resulting from data that is
stationary outside... | [
{
"created": "Wed, 14 Oct 2020 22:22:55 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Oct 2020 03:59:12 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jun 2021 21:32:11 GMT",
"version": "v3"
}
] | 2021-06-07 | [
[
"Bieri",
"Lydia",
""
]
] | We investigate the Einstein vacuum equations as well as the Einstein-null fluid equations describing neutrino radiation. We find new structures in gravitational waves and memory for asymptotically-flat spacetimes of slow decay. These structures do not arise in spacetimes resulting from data that is stationary outside a... |
1209.4563 | Soon-Tae Hong | Soon-Tae Hong | Global embeddings and hydrodynamic properties of Kerr black hole | 10 pages | Mod. Phys. Lett. A, Vol. 31, No. 35 (2016) 1650204 | 10.1142/S0217732316502047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the presence of a rotating Kerr black hole, we investigate hydrodynamics
of the massive particles and massless photons, to construct relations among
number density, pressure and internal energy density of the massive particles
and photons around the rotating Kerr black hole and to study an accretion onto
the black... | [
{
"created": "Thu, 20 Sep 2012 15:23:38 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Mar 2015 12:47:54 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Jan 2016 00:25:06 GMT",
"version": "v3"
},
{
"created": "Thu, 27 Oct 2016 05:22:36 GMT",
"version": "v4"
}
] | 2016-10-28 | [
[
"Hong",
"Soon-Tae",
""
]
] | In the presence of a rotating Kerr black hole, we investigate hydrodynamics of the massive particles and massless photons, to construct relations among number density, pressure and internal energy density of the massive particles and photons around the rotating Kerr black hole and to study an accretion onto the black h... |
1106.5674 | Otakar Svitek | Otakar Svitek | Past horizons in D-dimensional Robinson-Trautman spacetimes | to appear in Phys. Rev. D | Phys.Rev.D84:044027,2011 | 10.1103/PhysRevD.84.044027 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We derive the higher dimensional generalization of Penrose--Tod equation
describing past horizon in Robinson--Trautman spacetimes with a cosmological
constant and pure radiation. Existence of its solutions in $D>4$ dimensions is
proved using tools for nonlinear elliptic partial differential equations. We
show that th... | [
{
"created": "Tue, 28 Jun 2011 14:12:12 GMT",
"version": "v1"
}
] | 2011-09-08 | [
[
"Svitek",
"Otakar",
""
]
] | We derive the higher dimensional generalization of Penrose--Tod equation describing past horizon in Robinson--Trautman spacetimes with a cosmological constant and pure radiation. Existence of its solutions in $D>4$ dimensions is proved using tools for nonlinear elliptic partial differential equations. We show that this... |
gr-qc/9508018 | Eric Woolgar | R.D. Sorkin and E. Woolgar | A Causal Order for Spacetimes with $C^0$ Lorentzian Metrics: Proof of
Compactness of the Space of Causal Curves | Two small revisions to accomodate errors brought to our attention by
R.S. Garcia. No change to chief results. 33 pages | Class.Quant.Grav. 13 (1996) 1971-1994 | 10.1088/0264-9381/13/7/023 | null | gr-qc | null | We recast the tools of ``global causal analysis'' in accord with an approach
to the subject animated by two distinctive features: a thoroughgoing reliance
on order-theoretic concepts, and a utilization of the Vietoris topology for the
space of closed subsets of a compact set. We are led to work with a new causal
rela... | [
{
"created": "Mon, 7 Aug 1995 22:59:09 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Apr 1996 00:17:59 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jun 1999 21:08:19 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Sorkin",
"R. D.",
""
],
[
"Woolgar",
"E.",
""
]
] | We recast the tools of ``global causal analysis'' in accord with an approach to the subject animated by two distinctive features: a thoroughgoing reliance on order-theoretic concepts, and a utilization of the Vietoris topology for the space of closed subsets of a compact set. We are led to work with a new causal relati... |
gr-qc/0205107 | David Garfinkle | David Garfinkle and Carsten Gundlach | Perturbations of an exact solution for 2+1 dimensional critical collapse | references added, treatment shortened | Phys.Rev.D66:044015,2002 | 10.1103/PhysRevD.66.044015 | null | gr-qc | null | We find the perturbation spectrum of a family of spherically symmetric and
continuously self-similar (CSS) exact solutions that appear to be relevant for
the critical collapse of scalar field matter in 2+1 spacetime dimensions. The
rate of exponential growth of the unstable perturbation yields the critical
exponent. ... | [
{
"created": "Fri, 24 May 2002 23:58:50 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2002 14:48:31 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Garfinkle",
"David",
""
],
[
"Gundlach",
"Carsten",
""
]
] | We find the perturbation spectrum of a family of spherically symmetric and continuously self-similar (CSS) exact solutions that appear to be relevant for the critical collapse of scalar field matter in 2+1 spacetime dimensions. The rate of exponential growth of the unstable perturbation yields the critical exponent. Ou... |
1205.3926 | Dirk Puetzfeld | Jan Steinhoff, Dirk Puetzfeld | Influence of internal structure on the motion of test bodies in extreme
mass ratio situations | 23 pages, 6 figures, RevTex format | Phys.Rev.D86:044033,2012 | 10.1103/PhysRevD.86.044033 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the motion of test bodies with internal structure in General
Relativity. With the help of a multipolar approximation method for extended
test bodies we derive the equations of motion up to the quadrupolar order. The
motion of pole-dipole and quadrupole test bodies is studied in the context of
the Kerr ... | [
{
"created": "Thu, 17 May 2012 13:16:18 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jul 2013 09:20:26 GMT",
"version": "v2"
}
] | 2013-07-10 | [
[
"Steinhoff",
"Jan",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | We investigate the motion of test bodies with internal structure in General Relativity. With the help of a multipolar approximation method for extended test bodies we derive the equations of motion up to the quadrupolar order. The motion of pole-dipole and quadrupole test bodies is studied in the context of the Kerr ge... |
1908.11716 | Mauricio Bellini | Juan Ignacio Musmarra (IFIMAR, CONICET & UNMdP), Mauricio Bellini
(IFIMAR, CONICET & UNMdP) | Quantum thermodynamics in a static de Sitter space-time and initial
state of the universe | Version accepted in EPJC. arXiv admin note: text overlap with
arXiv:1904.11599 | null | 10.1140/epjc/s10052-019-7433-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using Relativistic Quantum Geometry we study back-reaction effects of
space-time inside the causal horizon of a static de Sitter metric, in order to
make a quantum thermodynamical description of space-time. We found a finite
number of discrete energy levels for a scalar field from a polynomial condition
of the conflu... | [
{
"created": "Thu, 29 Aug 2019 13:41:11 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Oct 2019 11:41:40 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Nov 2019 12:13:58 GMT",
"version": "v3"
}
] | 2020-01-08 | [
[
"Musmarra",
"Juan Ignacio",
"",
"IFIMAR, CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR, CONICET & UNMdP"
]
] | Using Relativistic Quantum Geometry we study back-reaction effects of space-time inside the causal horizon of a static de Sitter metric, in order to make a quantum thermodynamical description of space-time. We found a finite number of discrete energy levels for a scalar field from a polynomial condition of the confluen... |
1603.05113 | Vasilis Oikonomou | Sebastian Bahamonde, S.D. Odintsov, V.K. Oikonomou, Matthew Wright | Correspondence of $F(R)$ Gravity Singularities in Jordan and Einstein
Frames | null | null | 10.1016/j.aop.2016.06.020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the finite time singularity correspondence between the Jordan and
Einstein frames for various $F(R)$ gravity theories. Particularly we
investigate the ordinary pure $F(R)$ gravity case and the unimodular $F(R)$
gravity cases, in the absence of any matter fluids. In the ordinary $F(R)$
gravity cases, by using... | [
{
"created": "Wed, 16 Mar 2016 14:18:59 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Wright",
"Matthew",
""
]
] | We study the finite time singularity correspondence between the Jordan and Einstein frames for various $F(R)$ gravity theories. Particularly we investigate the ordinary pure $F(R)$ gravity case and the unimodular $F(R)$ gravity cases, in the absence of any matter fluids. In the ordinary $F(R)$ gravity cases, by using s... |
gr-qc/0104014 | P. M. Saffin | P. M. Saffin | Gravitating Fluxbranes | 14 pages, 5 figures | Phys.Rev. D64 (2001) 024014 | 10.1103/PhysRevD.64.024014 | DCPT/01/33 | gr-qc hep-th | null | We consider the effect that gravity has when one tries to set up a constant
background form field. We find that in analogy with the Melvin solution, where
magnetic field lines self-gravitate to form a flux-tube, the self-gravity of
the form field creates fluxbranes. Several exact solutions are found
corresponding to ... | [
{
"created": "Wed, 4 Apr 2001 14:52:24 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Saffin",
"P. M.",
""
]
] | We consider the effect that gravity has when one tries to set up a constant background form field. We find that in analogy with the Melvin solution, where magnetic field lines self-gravitate to form a flux-tube, the self-gravity of the form field creates fluxbranes. Several exact solutions are found corresponding to di... |
0906.1563 | Adam Kelleher | Laura Mersini-Houghton, Adam Kelleher | Investigating Dark Energy with Black Hole Binaries | null | Nucl.Phys.Proc.Suppl.194:272-277,2009 | 10.1016/j.nuclphysbps.2009.07.091 | null | gr-qc | http://creativecommons.org/licenses/publicdomain/ | The accelerated expansion of the universe is ascribed to the existence of
dark energy. Black holes accretion of dark energy induces a mass change
proportional to the energy density and pressure of the background dark energy
fluid. The time scale during which the mass of black holes changes considerably
is too long re... | [
{
"created": "Mon, 8 Jun 2009 18:57:04 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Mersini-Houghton",
"Laura",
""
],
[
"Kelleher",
"Adam",
""
]
] | The accelerated expansion of the universe is ascribed to the existence of dark energy. Black holes accretion of dark energy induces a mass change proportional to the energy density and pressure of the background dark energy fluid. The time scale during which the mass of black holes changes considerably is too long rela... |
2202.01132 | Robert J. Scherrer | Robert J. Scherrer | Exact general solutions for cosmological scalar field evolution in a
background-dominated expansion | 13 pages, 3 figures, references added | Phys. Rev. D, 105, 103502 (2022) | 10.1103/PhysRevD.105.103502 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive exact general solutions (as opposed to attractor particular
solutions) and corresponding first integrals for the evolution of a scalar
field $\phi$ in a universe dominated by a background fluid with equation of
state parameter $w_B$. In addition to the previously-examined linear [$V(\phi)
= V_0 \phi$] and q... | [
{
"created": "Wed, 2 Feb 2022 16:44:57 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Feb 2022 21:20:56 GMT",
"version": "v2"
}
] | 2022-08-08 | [
[
"Scherrer",
"Robert J.",
""
]
] | We derive exact general solutions (as opposed to attractor particular solutions) and corresponding first integrals for the evolution of a scalar field $\phi$ in a universe dominated by a background fluid with equation of state parameter $w_B$. In addition to the previously-examined linear [$V(\phi) = V_0 \phi$] and qua... |
0909.1922 | Iain Brown | I. A. Brown, L. Schrempp and K. Ananda | Accelerating the Universe with Gravitational Waves | 18 pages, 4 figures. Replaced with version published by JCAP - some
discussion and references added concerning second-order gravitational waves,
typeset in JHEP style | JCAP 1002:011,2010 | 10.1088/1475-7516/2010/02/011 | HD-THEP-09-19 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflation generically produces primordial gravitational waves with a red
spectral tilt. In this paper we calculate the backreaction produced by these
gravitational waves on the expansion of the universe. We find that in radiation
domination the backreaction acts as a relativistic fluid, while in matter
domination a s... | [
{
"created": "Thu, 10 Sep 2009 15:23:23 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2010 14:02:48 GMT",
"version": "v2"
}
] | 2010-02-17 | [
[
"Brown",
"I. A.",
""
],
[
"Schrempp",
"L.",
""
],
[
"Ananda",
"K.",
""
]
] | Inflation generically produces primordial gravitational waves with a red spectral tilt. In this paper we calculate the backreaction produced by these gravitational waves on the expansion of the universe. We find that in radiation domination the backreaction acts as a relativistic fluid, while in matter domination a sma... |
1706.04435 | M. Farasat Shamir | M. Farasat Shamir | Exploring Plane Symmetric Solutions in $f(R)$ Gravity | 16 pages, Extended analysis of arXiv:0912.1393 | J. Exp. Theor. Phys. 122 (2016) 331 | 10.1134/S106377611601009X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified theories of gravity, especially the $f(R)$ gravity, have
attracted much attention in the last decade. This paper is devoted to exploring
plane symmetric solutions in the context of metric $f(R)$ gravity. We extend
the work on static plane symmetric vacuum solutions in $f(R)$ gravity already
available in ... | [
{
"created": "Tue, 13 Jun 2017 17:42:45 GMT",
"version": "v1"
}
] | 2017-06-15 | [
[
"Shamir",
"M. Farasat",
""
]
] | The modified theories of gravity, especially the $f(R)$ gravity, have attracted much attention in the last decade. This paper is devoted to exploring plane symmetric solutions in the context of metric $f(R)$ gravity. We extend the work on static plane symmetric vacuum solutions in $f(R)$ gravity already available in li... |
1303.0855 | Tjonnie Guang Feng Li | T. G. F. Li, W. Del Pozzo, C. Messenger | Measuring the redshift of standard sirens using the neutron star
deformability | 3 pages, 1 figure, Marcel Grossmann 13 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent study has shown that redshift information can be directly extracted
from gravitational wave sources. This can be done by exploiting the tidal
phasing contributions to the waveform during the inspiral phase of binary
neutron stars coalescences. The original study investigated the viability of
this idea in the... | [
{
"created": "Mon, 4 Mar 2013 21:11:06 GMT",
"version": "v1"
}
] | 2013-03-06 | [
[
"Li",
"T. G. F.",
""
],
[
"Del Pozzo",
"W.",
""
],
[
"Messenger",
"C.",
""
]
] | A recent study has shown that redshift information can be directly extracted from gravitational wave sources. This can be done by exploiting the tidal phasing contributions to the waveform during the inspiral phase of binary neutron stars coalescences. The original study investigated the viability of this idea in the c... |
0911.1000 | J\"org Hennig | J\"org Hennig, Marcus Ansorg | Regularity of Cauchy horizons in S2xS1 Gowdy spacetimes | 17 pages, 1 figure | Class.Quant.Grav.27:065010,2010 | 10.1088/0264-9381/27/6/065010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study general S2xS1 Gowdy models with a regular past Cauchy horizon and
prove that a second (future) Cauchy horizon exists, provided that a particular
conserved quantity $J$ is not zero. We derive an explicit expression for the
metric form on the future Cauchy horizon in terms of the initial data on the
past horiz... | [
{
"created": "Thu, 5 Nov 2009 09:48:44 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Mar 2010 09:45:23 GMT",
"version": "v2"
}
] | 2010-11-03 | [
[
"Hennig",
"Jörg",
""
],
[
"Ansorg",
"Marcus",
""
]
] | We study general S2xS1 Gowdy models with a regular past Cauchy horizon and prove that a second (future) Cauchy horizon exists, provided that a particular conserved quantity $J$ is not zero. We derive an explicit expression for the metric form on the future Cauchy horizon in terms of the initial data on the past horizon... |
1907.06719 | Ritabrata Biswas | Parthajit Roy and Ritabrata Biswas | Search for Missing Links Between Two Extreme Wind Speed Profiles : Dark
Energy Accretion and Adiabatic Fluid Accretion | 53 figures | null | 10.1140/epjc/s10052-020-7755-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent past, the progresses in accretion studies onto relativistically
gravitating central objects like a Schwarzschild singularity reveal that the
accretion flow must be transonic. For such cases, the radial inward speed
gradient can be written as a numerator by denominator form among which the
later vanishes som... | [
{
"created": "Fri, 12 Jul 2019 10:14:43 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2020 14:01:39 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Roy",
"Parthajit",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | In recent past, the progresses in accretion studies onto relativistically gravitating central objects like a Schwarzschild singularity reveal that the accretion flow must be transonic. For such cases, the radial inward speed gradient can be written as a numerator by denominator form among which the later vanishes somew... |
1605.04946 | Fabio Anza | Fabio Anz\`a and Goffredo Chirco | Typicality in spin network states of quantum geometry | Typos and mistakes fixed | Phys. Rev. D 94, 084047 (2016) | 10.1103/PhysRevD.94.084047 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we extend the so-called typicality approach, originally
formulated in statistical mechanics contexts, to $SU(2)$-invariant spin-network
states. Our results do not depend on the physical interpretation of the spin
network; however, they are mainly motivated by the fact that spin-network
states can descri... | [
{
"created": "Mon, 16 May 2016 20:50:26 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Oct 2016 18:14:49 GMT",
"version": "v2"
}
] | 2016-11-02 | [
[
"Anzà",
"Fabio",
""
],
[
"Chirco",
"Goffredo",
""
]
] | In this work, we extend the so-called typicality approach, originally formulated in statistical mechanics contexts, to $SU(2)$-invariant spin-network states. Our results do not depend on the physical interpretation of the spin network; however, they are mainly motivated by the fact that spin-network states can describe... |
1506.06485 | Nami Uchikata | Nami Uchikata and Shijun Yoshida | Slowly rotating thin shell gravastars | 36 pages, 32 figures | null | 10.1088/0264-9381/33/2/025005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the solutions of slowly rotating gravastars with a thin shell.
In the zero-rotation limit, we consider the gravastar composed of a de Sitter
core, a thin shell, and Schwarzschild exterior spacetime. The rotational
effects are treated as small axisymmetric and stationary perturbations. The
perturbed inter... | [
{
"created": "Mon, 22 Jun 2015 07:18:39 GMT",
"version": "v1"
}
] | 2016-01-13 | [
[
"Uchikata",
"Nami",
""
],
[
"Yoshida",
"Shijun",
""
]
] | We construct the solutions of slowly rotating gravastars with a thin shell. In the zero-rotation limit, we consider the gravastar composed of a de Sitter core, a thin shell, and Schwarzschild exterior spacetime. The rotational effects are treated as small axisymmetric and stationary perturbations. The perturbed interna... |
2306.00173 | Yotam Sherf | Shani Avitan, Ram Brustein and Yotam Sherf | Discovering Love numbers through resonance excitation during extreme
mass ratio inspirals | 23 pages, 2 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | General Relativity predicts that black holes do not possess an internal
structure and consequently cannot be excited. This leads to a specific
prediction about the waveform of gravitational waves, which they emit during a
binary black hole inspiral and to the vanishing of their Love numbers. However,
if astrophysical... | [
{
"created": "Wed, 31 May 2023 20:42:13 GMT",
"version": "v1"
}
] | 2023-06-02 | [
[
"Avitan",
"Shani",
""
],
[
"Brustein",
"Ram",
""
],
[
"Sherf",
"Yotam",
""
]
] | General Relativity predicts that black holes do not possess an internal structure and consequently cannot be excited. This leads to a specific prediction about the waveform of gravitational waves, which they emit during a binary black hole inspiral and to the vanishing of their Love numbers. However, if astrophysical b... |
2108.13528 | Aneta Wojnar | Aneta Wojnar | Jupiter and jovian (exo)-planets in Palatini $f(\bar R)$ gravity | 13 pages, 2 figures, 2 tables | Phys. Rev. D 104, 104058, 2021 | 10.1103/PhysRevD.104.104058 | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some parts of the substellar evolution, such as fragmentation of a gaseous
cloud and Jupiter-like planet's cooling, are demonstrated to be impacted by
Palatini $f(\bar R)$ gravity. Using simple models describing those processes we
show that the opacity mass limit as well as cooling time of jovian planets
differ in mo... | [
{
"created": "Mon, 30 Aug 2021 21:44:56 GMT",
"version": "v1"
}
] | 2021-11-24 | [
[
"Wojnar",
"Aneta",
""
]
] | Some parts of the substellar evolution, such as fragmentation of a gaseous cloud and Jupiter-like planet's cooling, are demonstrated to be impacted by Palatini $f(\bar R)$ gravity. Using simple models describing those processes we show that the opacity mass limit as well as cooling time of jovian planets differ in modi... |
1908.03488 | Yurii Ignat'ev | Yu. G. Ignat'ev | The self-consistent field method and the macroscopic universe consisting
of a fluid and a black holes | 9 pages, 27 references | Grav. and Cosmol., v. 25, Issue 4, 2019 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The article discusses and substantiates a self-consistent approach to the
macroscopic description of systems with gravitational interaction. Corrections
to the equation of state of the fluid are found based on macroscopic Einstein
equations which were obtained by averaging over microscopic spherically
symmetric metri... | [
{
"created": "Fri, 9 Aug 2019 15:08:43 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Aug 2019 21:21:32 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Sep 2019 10:03:17 GMT",
"version": "v3"
}
] | 2019-09-04 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | The article discusses and substantiates a self-consistent approach to the macroscopic description of systems with gravitational interaction. Corrections to the equation of state of the fluid are found based on macroscopic Einstein equations which were obtained by averaging over microscopic spherically symmetric metric ... |
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