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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1608.03186 | Hao Wen | Hao Wen, Fangyu Li, Jin Li, Zhenyun Fang, Andrew Beckwith | Very high frequency gravitational waves from magnetars and gamma-ray
burst | null | Chinese Physics C, Vol. 41, No. 12 (2017) 125101 | 10.1088/1674-1137/41/12/125101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extremely powerful astrophysical electromagnetic (EM) system could be
possible source of high-frequency gravitational waves (HFGWs). Here based on
properties of magnetars and gamma-ray bursts (GRBs), we address "Gamma-HFGWs"
(with very high-frequency around 10^{20}Hz) caused by ultra-strong EM
radiations (in the radi... | [
{
"created": "Sun, 17 Jul 2016 21:48:48 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Apr 2017 07:45:16 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Oct 2017 19:54:22 GMT",
"version": "v3"
}
] | 2024-04-04 | [
[
"Wen",
"Hao",
""
],
[
"Li",
"Fangyu",
""
],
[
"Li",
"Jin",
""
],
[
"Fang",
"Zhenyun",
""
],
[
"Beckwith",
"Andrew",
""
]
] | Extremely powerful astrophysical electromagnetic (EM) system could be possible source of high-frequency gravitational waves (HFGWs). Here based on properties of magnetars and gamma-ray bursts (GRBs), we address "Gamma-HFGWs" (with very high-frequency around 10^{20}Hz) caused by ultra-strong EM radiations (in the radiat... |
1010.0099 | Arturo Stabile | A. Stabile, S. Capozziello | Weak Field Approach in f(R)-Gravity | 4 pages, 5 figures, Proceedings of SAIt 2010 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this communication we discuss the Weak Field Approach, and in particular
the Newtonian limit, applied to f(R)-Gravity. Particular emphasis is placed on
the spherically symmetric solutions and finally, it is clearly shown that
General Relativity results, in the Solar System context, are easily recovered
since Einst... | [
{
"created": "Fri, 1 Oct 2010 09:14:43 GMT",
"version": "v1"
}
] | 2010-10-04 | [
[
"Stabile",
"A.",
""
],
[
"Capozziello",
"S.",
""
]
] | In this communication we discuss the Weak Field Approach, and in particular the Newtonian limit, applied to f(R)-Gravity. Particular emphasis is placed on the spherically symmetric solutions and finally, it is clearly shown that General Relativity results, in the Solar System context, are easily recovered since Einstei... |
1206.3077 | Mandar Patil | Satyabrata Sahu, Mandar Patil, D. Narasimha, Pankaj S. Joshi | Can strong gravitational lensing distinguish naked singularities from
black holes? | 13 pages; 9 figures; 3 tables; modified discussion on the JNW
geometry; accepted for publication in Physical Review D | Phys. Rev. D 86, 063010 (2012) | 10.1103/PhysRevD.86.063010 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study gravitational lensing in the strong field limit from
the perspective of cosmic censorship, to investigate whether or not naked
singularities, if at all they exist in nature, can be distinguished from black
holes. We study the gravitational lensing in the strong field regime in the JMN
spacetime... | [
{
"created": "Thu, 14 Jun 2012 12:05:18 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Aug 2012 17:31:12 GMT",
"version": "v2"
}
] | 2012-09-21 | [
[
"Sahu",
"Satyabrata",
""
],
[
"Patil",
"Mandar",
""
],
[
"Narasimha",
"D.",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | In this paper we study gravitational lensing in the strong field limit from the perspective of cosmic censorship, to investigate whether or not naked singularities, if at all they exist in nature, can be distinguished from black holes. We study the gravitational lensing in the strong field regime in the JMN spacetime, ... |
2002.08336 | Thomas Buchert | L\'eo Brunswic and Thomas Buchert | Gauss-Bonnet-Chern approach to the averaged Universe | 44 pages, matches published version in CQG | Class. Quantum Grav. 37 (2020) 215022 | 10.1088/1361-6382/abae45 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard model of cosmology with postulated dark energy and dark matter
sources may be considered as a fairly successful fitting model to observational
data. However, this model leaves the question of the physical origin of these
dark components open. Fully relativistic contributions that act like dark
energy on ... | [
{
"created": "Wed, 19 Feb 2020 18:21:29 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Mar 2020 20:38:39 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Oct 2020 18:34:28 GMT",
"version": "v3"
}
] | 2020-10-26 | [
[
"Brunswic",
"Léo",
""
],
[
"Buchert",
"Thomas",
""
]
] | The standard model of cosmology with postulated dark energy and dark matter sources may be considered as a fairly successful fitting model to observational data. However, this model leaves the question of the physical origin of these dark components open. Fully relativistic contributions that act like dark energy on la... |
0803.2533 | Stanislav Hled\'ik | Zden\v{e}k Stuchl\'ik, Stanislav Hled\'ik and Josef Jur\'a\v{n} | Optical reference geometry of the Kerr-Newman spacetimes | 28 pages, 17 figures | Class.Quant.Grav.17:2691-2718,2000 | 10.1088/0264-9381/17/14/307 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Properties of the optical reference geometry related to Kerr-Newman
black-hole and naked-singularity spacetimes are illustrated using embedding
diagrams of their equatorial plane. Among all inertial forces defined in the
framework of the optical geometry, just the centrifugal force plays a
fundamental role in connect... | [
{
"created": "Mon, 17 Mar 2008 21:35:33 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Hledík",
"Stanislav",
""
],
[
"Juráň",
"Josef",
""
]
] | Properties of the optical reference geometry related to Kerr-Newman black-hole and naked-singularity spacetimes are illustrated using embedding diagrams of their equatorial plane. Among all inertial forces defined in the framework of the optical geometry, just the centrifugal force plays a fundamental role in connectio... |
1106.5575 | Claudio Dappiaggi | Claudio Dappiaggi and Daniel Siemssen | Hadamard States for the Vector Potential on Asymptotically Flat
Spacetimes | 25 pages, comments added, improved notation, minor typos corrected
and updated bibliography | Rev.Math.Phys.25:1350002,2013 | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a quantization scheme for the vector potential on globally
hyperbolic spacetimes which realizes it as a locally covariant conformal
quantum field theory. This result allows us to employ on a large class of
backgrounds, which are asymptotically flat at null infinity, a bulk-to-boundary
correspondence proced... | [
{
"created": "Tue, 28 Jun 2011 06:51:32 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jul 2011 15:40:25 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Jul 2011 17:13:49 GMT",
"version": "v3"
},
{
"created": "Sat, 16 Feb 2013 17:31:31 GMT",
"version": "v4"
}
] | 2013-02-19 | [
[
"Dappiaggi",
"Claudio",
""
],
[
"Siemssen",
"Daniel",
""
]
] | We develop a quantization scheme for the vector potential on globally hyperbolic spacetimes which realizes it as a locally covariant conformal quantum field theory. This result allows us to employ on a large class of backgrounds, which are asymptotically flat at null infinity, a bulk-to-boundary correspondence procedur... |
2111.05556 | Felix Finster | Felix Finster, Maximilian Jokel, Claudio F. Paganini | A Mechanism of Baryogenesis for Causal Fermion Systems | 50 pages, LaTeX, 7 figures, correction in formula (5.10) | Class. Quantum Grav. 39 (2022) 165005 | 10.1088/1361-6382/ac7a86 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the theory of causal fermion systems gives rise to a novel
mechanism of baryogenesis. This mechanism is worked out computationally in
globally hyperbolic spacetimes in a way which enables the quantitative study in
concrete cosmological situations.
| [
{
"created": "Wed, 10 Nov 2021 07:40:04 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jun 2022 05:59:00 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Sep 2023 07:29:32 GMT",
"version": "v3"
}
] | 2023-09-12 | [
[
"Finster",
"Felix",
""
],
[
"Jokel",
"Maximilian",
""
],
[
"Paganini",
"Claudio F.",
""
]
] | It is shown that the theory of causal fermion systems gives rise to a novel mechanism of baryogenesis. This mechanism is worked out computationally in globally hyperbolic spacetimes in a way which enables the quantitative study in concrete cosmological situations. |
1106.1426 | Wade Naylor | H. T. Cho (Tamkang U.), A. S. Cornell (Witwatersrand U.), Jason Doukas
(Kyoto U., Yukawa Inst., Kyoto) and Wade Naylor (Osaka U.) | Scalar spheroidal harmonics in five dimensional Kerr-(A)dS | 11 pages, two figures, one table; vz. 2: reference added and grammar
corrected | Prog. Theor. Phys. 128 (2012), 227-241 | 10.1143/PTP.128.227 | YITP-11-63, WITS-CTP-74, OU-HET-708/2011 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive expressions for the general five-dimensional metric for Kerr-(A)dS
black holes. The Klein-Gordon equation is explicitly separated and we show that
the angular part of the wave equation leads to just one spheroidal wave
equation, which is also that for charged five-dimensional Kerr-(A)dS black
holes. We pres... | [
{
"created": "Tue, 7 Jun 2011 19:59:45 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jun 2011 05:17:59 GMT",
"version": "v2"
}
] | 2012-09-03 | [
[
"Cho",
"H. T.",
"",
"Tamkang U."
],
[
"Cornell",
"A. S.",
"",
"Witwatersrand U."
],
[
"Doukas",
"Jason",
"",
"Kyoto U., Yukawa Inst., Kyoto"
],
[
"Naylor",
"Wade",
"",
"Osaka U."
]
] | We derive expressions for the general five-dimensional metric for Kerr-(A)dS black holes. The Klein-Gordon equation is explicitly separated and we show that the angular part of the wave equation leads to just one spheroidal wave equation, which is also that for charged five-dimensional Kerr-(A)dS black holes. We presen... |
gr-qc/9405012 | Pavol Kolnik | C. Klimcik, P. Kolnik, and A. Pompos | Non-commutative black holes in $D$ dimensions | 15 pp., LaTeX, preprint PRA-HEP-94/5 | null | null | null | gr-qc | null | Recently introduced classical theory of gravity in non-commutative geometry
is studied. The most general (four parametric) family of $D$ dibensional static
spherically symmetric spacetimes is identified and its properties are studied
in detail. For wide class of the choices of parameters, the corresponding
spacetimes... | [
{
"created": "Fri, 6 May 1994 10:10:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Klimcik",
"C.",
""
],
[
"Kolnik",
"P.",
""
],
[
"Pompos",
"A.",
""
]
] | Recently introduced classical theory of gravity in non-commutative geometry is studied. The most general (four parametric) family of $D$ dibensional static spherically symmetric spacetimes is identified and its properties are studied in detail. For wide class of the choices of parameters, the corresponding spacetimes h... |
1508.02337 | Aghil Alaee | Aghil Alaee and Hari K. Kunduri | Remarks on mass and angular momenta for $U(1)^2$-invariant initial data | 17 pages, LaTeX; v2. assumptions on generalized Brill data weakened
and the main theorem modified accordingly | null | 10.1063/1.4944426 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend Brill's positive mass theorem to a large class of asymptotically
flat, maximal, $U(1)^2$-invariant initial data sets on simply connected four
dimensional manifolds $\Sigma$. Moreover, we extend the local mass angular
momenta inequality result Ref [1] for $U(1)^2$ invariant black holes to the
case with nonze... | [
{
"created": "Mon, 10 Aug 2015 18:02:23 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Dec 2015 18:40:43 GMT",
"version": "v2"
}
] | 2016-04-20 | [
[
"Alaee",
"Aghil",
""
],
[
"Kunduri",
"Hari K.",
""
]
] | We extend Brill's positive mass theorem to a large class of asymptotically flat, maximal, $U(1)^2$-invariant initial data sets on simply connected four dimensional manifolds $\Sigma$. Moreover, we extend the local mass angular momenta inequality result Ref [1] for $U(1)^2$ invariant black holes to the case with nonzero... |
1105.5812 | Victor Shchigolev Konstantinovich | V.K. Shchigolev, G.N. Orekhova | Non-Minimal Cosmological Model in Modified Yang--Mills Theory | 7 pages | Modern Physics Letters A (2011) Vol. 26, No. 26, pp. 1965-1973 | 10.1142/S0217732311036462 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we consider a model of non-minimal modified Yang-Mills
theory in the Friedmann-Robertson-Walker cosmology, in which the Yang-Mills
field couples to the scalar curvature through a function of its first
invariant. We show that cosmic acceleration can be realized due to non-minimal
gravitational co... | [
{
"created": "Sun, 29 May 2011 18:43:15 GMT",
"version": "v1"
}
] | 2012-09-13 | [
[
"Shchigolev",
"V. K.",
""
],
[
"Orekhova",
"G. N.",
""
]
] | In the present paper, we consider a model of non-minimal modified Yang-Mills theory in the Friedmann-Robertson-Walker cosmology, in which the Yang-Mills field couples to the scalar curvature through a function of its first invariant. We show that cosmic acceleration can be realized due to non-minimal gravitational coup... |
2207.08488 | Szymon Sikora | Szymon Sikora | Second-order dust perturbations of the non-flat FLRW model with the
positive cosmological constant | null | null | 10.1088/1361-6382/acaa81 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, a specific solution to the second-order cosmological
perturbation theory is given. Perturbations are performed around any FLRW
spacetime filled with dust and with a positive cosmological constant. In
particular, with a possibly non-vanishing spatial curvature. The adopted
symmetry condition allows us t... | [
{
"created": "Mon, 18 Jul 2022 10:12:51 GMT",
"version": "v1"
}
] | 2023-01-04 | [
[
"Sikora",
"Szymon",
""
]
] | In this paper, a specific solution to the second-order cosmological perturbation theory is given. Perturbations are performed around any FLRW spacetime filled with dust and with a positive cosmological constant. In particular, with a possibly non-vanishing spatial curvature. The adopted symmetry condition allows us to ... |
gr-qc/0602054 | Wolfgang Graf | Wolfgang Graf | Ricci Flow Gravity | 15 pages. V2: improved presentation, in particular Jordan vs.
Brans-Dicke and on viability. Added section on physical interpretation. V3:
more references. Reworked to agree with published version | PMCPhys.A1:3,2007 | 10.1186/1754-0410-1-3 | null | gr-qc astro-ph hep-th math.DG | null | A theory of gravitation is proposed, modeled after the notion of a Ricci
flow. In addition to the metric an independent volume enters as a fundamental
geometric structure. Einstein gravity is included as a limiting case. Despite
being a scalar-tensor theory the coupling to matter is different from
Jordan-Brans-Dicke ... | [
{
"created": "Tue, 14 Feb 2006 20:22:50 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Mar 2006 22:06:20 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Oct 2007 18:51:09 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Graf",
"Wolfgang",
""
]
] | A theory of gravitation is proposed, modeled after the notion of a Ricci flow. In addition to the metric an independent volume enters as a fundamental geometric structure. Einstein gravity is included as a limiting case. Despite being a scalar-tensor theory the coupling to matter is different from Jordan-Brans-Dicke gr... |
1612.04177 | Kirill Bronnikov | S.V. Bolokhov, K.A. Bronnikov | Cosmology in nonlinear multidimensional gravity and the Casimir effect | 6 pages, 1 figure, submitted to Proceedings of the International
conference on particle physics and astrophysics (10-14 October 2016, Moscow,
Russia) | J. Phys. Conf. Series 798, 012091 (2017) | 10.1134/S0202289316040034 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possible cosmological models in Kaluza-Klein-type
multidimensional gravity with a curvature-nonlinear Lagrangian and a spherical
extra space, taking into account the Casimir energy. First, we find a minimum
of the effective potential of extra dimensions, leading to a physically
reasonable value of the ef... | [
{
"created": "Tue, 13 Dec 2016 13:57:37 GMT",
"version": "v1"
}
] | 2017-09-19 | [
[
"Bolokhov",
"S. V.",
""
],
[
"Bronnikov",
"K. A.",
""
]
] | We study the possible cosmological models in Kaluza-Klein-type multidimensional gravity with a curvature-nonlinear Lagrangian and a spherical extra space, taking into account the Casimir energy. First, we find a minimum of the effective potential of extra dimensions, leading to a physically reasonable value of the effe... |
1809.05355 | Joao Magueijo | John D. Barrow and Joao Magueijo | Do we live in an eigenstate of the "fundamental constants" operators? | Accepted manuscript | Phys. Rev. D 99, 023509 (2019) | 10.1103/PhysRevD.99.023509 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that the constants of Nature we observe (which appear as
parameters in the classical action) are quantum observables in a kinematical
Hilbert space. When all of these observables commute, our proposal differs
little from the treatment given to classical parameters in quantum information
theory, at least if... | [
{
"created": "Fri, 14 Sep 2018 11:10:31 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Dec 2018 11:05:13 GMT",
"version": "v2"
}
] | 2019-01-09 | [
[
"Barrow",
"John D.",
""
],
[
"Magueijo",
"Joao",
""
]
] | We propose that the constants of Nature we observe (which appear as parameters in the classical action) are quantum observables in a kinematical Hilbert space. When all of these observables commute, our proposal differs little from the treatment given to classical parameters in quantum information theory, at least if w... |
1112.1961 | Sergei Alexandrov | Sergei Alexandrov, Marc Geiller, Karim Noui | Spin Foams and Canonical Quantization | null | SIGMA 8 (2012), 055, 79 pages | 10.3842/SIGMA.2012.055 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | This review is devoted to the analysis of the mutual consistency of the spin
foam and canonical loop quantizations in three and four spacetime dimensions.
In the three-dimensional context, where the two approaches are in good
agreement, we show how the canonical quantization \`a la Witten of Riemannian
gravity with a... | [
{
"created": "Thu, 8 Dec 2011 21:09:08 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Dec 2011 20:46:18 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Aug 2012 05:16:34 GMT",
"version": "v3"
}
] | 2012-08-21 | [
[
"Alexandrov",
"Sergei",
""
],
[
"Geiller",
"Marc",
""
],
[
"Noui",
"Karim",
""
]
] | This review is devoted to the analysis of the mutual consistency of the spin foam and canonical loop quantizations in three and four spacetime dimensions. In the three-dimensional context, where the two approaches are in good agreement, we show how the canonical quantization \`a la Witten of Riemannian gravity with a p... |
2005.11697 | F Shojai | H. Khodabakhshi, A. Shirzad, F. Shojai, Robert B. Mann | Black Hole Entropy and Boundary Conditions | 22 pages, To appear in Phys. Rev. D | Phys. Rev. D 101, 124007 (2020) | 10.1103/PhysRevD.101.124007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that in order to make the action well defined, one may
employ different kinds of boundary conditions (BCs) accompanied by the
appropriate Gibbons-Hawking-York (GHY) terms. In this paper we investigate the
role of the selected BC and the corresponding GHY terms on the black hole (BH)
entropy. Our resu... | [
{
"created": "Sun, 24 May 2020 09:24:39 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Khodabakhshi",
"H.",
""
],
[
"Shirzad",
"A.",
""
],
[
"Shojai",
"F.",
""
],
[
"Mann",
"Robert B.",
""
]
] | It is well-known that in order to make the action well defined, one may employ different kinds of boundary conditions (BCs) accompanied by the appropriate Gibbons-Hawking-York (GHY) terms. In this paper we investigate the role of the selected BC and the corresponding GHY terms on the black hole (BH) entropy. Our result... |
2311.05774 | Lucas Acito | Lucas Acito, Nicol\'as E. Grandi and Pablo Pisani | Superradiant black hole rocket | 35 pages, 27 figures | Phys. Rev. D 109, 065008 (2024) | 10.1103/PhysRevD.109.065008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the total thrust resulting from the interaction between charged
scalar modes and a superradiant Reissner-Nordstr\"om black hole, when the modes
are deflected by a hemispherical perfect mirror located at a finite distance
from the black hole's horizon.
| [
{
"created": "Thu, 9 Nov 2023 22:32:06 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2023 17:12:16 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Mar 2024 16:42:03 GMT",
"version": "v3"
},
{
"created": "Thu, 21 Mar 2024 17:17:03 GMT",
"version": "v4"
}
] | 2024-03-22 | [
[
"Acito",
"Lucas",
""
],
[
"Grandi",
"Nicolás E.",
""
],
[
"Pisani",
"Pablo",
""
]
] | We calculate the total thrust resulting from the interaction between charged scalar modes and a superradiant Reissner-Nordstr\"om black hole, when the modes are deflected by a hemispherical perfect mirror located at a finite distance from the black hole's horizon. |
1908.11720 | Tanwi Bandyopadhyay | Tanwi Bandyopadhyay and Ujjal Debnath | Bouncing Cosmology for Entropy Corrected Models in Horava-Lifshitz
Gravity and Fractal Universe | 24 pages, 16 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified field equations are written in logarithmic and power law
versions of entropy corrected models in Einstein's gravity in the background of
FRW universe. In one section, a brief review of the Ho$\check{\text
r}$ava-Lifshitz gravity is discussed and the modified field equations in
logarithmic and power law v... | [
{
"created": "Thu, 29 Aug 2019 11:32:26 GMT",
"version": "v1"
}
] | 2019-09-02 | [
[
"Bandyopadhyay",
"Tanwi",
""
],
[
"Debnath",
"Ujjal",
""
]
] | The modified field equations are written in logarithmic and power law versions of entropy corrected models in Einstein's gravity in the background of FRW universe. In one section, a brief review of the Ho$\check{\text r}$ava-Lifshitz gravity is discussed and the modified field equations in logarithmic and power law ver... |
1512.04332 | Przemyslaw Malkiewicz | Przemyslaw Malkiewicz | Physical Hilbert Spaces in Quantum Gravity | 6 pages, Proceedings of the 14th Marcel Grossmann Meeting (Rome, July
12-18, 2015) | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize our investigation of the extent to which the choice of internal
clock influences the dynamics in quantum models of gravity. Firstly, at the
classical level, we define an extension to the Hamilton-Jacobi theory of
contact transformations, which allows for transformations of time coordinates.
Secondly, at ... | [
{
"created": "Mon, 14 Dec 2015 14:19:49 GMT",
"version": "v1"
}
] | 2015-12-15 | [
[
"Malkiewicz",
"Przemyslaw",
""
]
] | We summarize our investigation of the extent to which the choice of internal clock influences the dynamics in quantum models of gravity. Firstly, at the classical level, we define an extension to the Hamilton-Jacobi theory of contact transformations, which allows for transformations of time coordinates. Secondly, at th... |
1806.08617 | Sam Dolan Dr | Sam R Dolan | Geometrical optics for scalar, electromagnetic and gravitational waves
in curved spacetime | 17 pages, 1 figure. Proceedings for IV Amazonian Symposium on
Physics, Belem, Brazil at UFPA on 18-22 Sep 2017 | Int. J. Mod. Phys. D 1843010 (2018) | 10.1142/S0218271818430101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometrical-optics expansion reduces the problem of solving wave
equations to one of solving transport equations along rays. Here we consider
scalar, electromagnetic and gravitational waves propagating on a curved
spacetime in general relativity. We show that each is governed by a wave
equation with the same prin... | [
{
"created": "Fri, 22 Jun 2018 12:02:38 GMT",
"version": "v1"
}
] | 2018-06-25 | [
[
"Dolan",
"Sam R",
""
]
] | The geometrical-optics expansion reduces the problem of solving wave equations to one of solving transport equations along rays. Here we consider scalar, electromagnetic and gravitational waves propagating on a curved spacetime in general relativity. We show that each is governed by a wave equation with the same princi... |
1402.4138 | Marc Geiller | Marc Geiller, Karim Noui | Near-Horizon Radiation and Self-Dual Loop Quantum Gravity | 6+2 pages | Europhys. Lett. 105 (2014) 60001 | 10.1209/0295-5075/105/60001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the near-horizon radiation of quantum black holes in the context
of self-dual loop quantum gravity. For this, we first use the unitary spinor
basis of $\text{SL}(2,\mathbb{C})$ to decompose states of Lorentzian spin foam
models into their self-dual and anti self-dual parts, and show that the reduced
densit... | [
{
"created": "Mon, 17 Feb 2014 21:00:34 GMT",
"version": "v1"
}
] | 2014-03-27 | [
[
"Geiller",
"Marc",
""
],
[
"Noui",
"Karim",
""
]
] | We compute the near-horizon radiation of quantum black holes in the context of self-dual loop quantum gravity. For this, we first use the unitary spinor basis of $\text{SL}(2,\mathbb{C})$ to decompose states of Lorentzian spin foam models into their self-dual and anti self-dual parts, and show that the reduced density ... |
2003.11554 | Manuel Hohmann | Sebastian Bahamonde, Konstantinos F. Dialektopoulos, Manuel Hohmann,
Jackson Levi Said | Post-Newtonian limit of Teleparallel Horndeski gravity | LaTeX, 22 pages, no figures; version accepted by Classical and
Quantum Gravity | null | 10.1088/1361-6382/abc441 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the newly proposed Bahamonde-Dialektopoulos-Levi Said (BDLS)
theory, that is the Horndeski analog in the teleparallel framework and thus
contains a non-minimally coupled scalar field, including higher order
derivatives, that leads however to second order field equations both for the
tetrad and the scalar ... | [
{
"created": "Wed, 25 Mar 2020 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2020 11:54:31 GMT",
"version": "v2"
}
] | 2020-11-04 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Dialektopoulos",
"Konstantinos F.",
""
],
[
"Hohmann",
"Manuel",
""
],
[
"Said",
"Jackson Levi",
""
]
] | We consider the newly proposed Bahamonde-Dialektopoulos-Levi Said (BDLS) theory, that is the Horndeski analog in the teleparallel framework and thus contains a non-minimally coupled scalar field, including higher order derivatives, that leads however to second order field equations both for the tetrad and the scalar fi... |
2408.02116 | Thomas Law | Aviral Damle and Thomas Law | A speculative model for cyclic information preservation in Kerr-Newman
spacetime using closed timelike curves | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper presents a speculative model exploring the behavior of quantum
information for particles entering closed timelike curves (CTCs) in Kerr-Newman
spacetime. We apply Gavassino's restoration principle to derive a theoretical
framework for cyclic information dynamics within these extreme gravitational
environme... | [
{
"created": "Sun, 4 Aug 2024 19:09:43 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2024 15:44:49 GMT",
"version": "v2"
}
] | 2024-08-09 | [
[
"Damle",
"Aviral",
""
],
[
"Law",
"Thomas",
""
]
] | This paper presents a speculative model exploring the behavior of quantum information for particles entering closed timelike curves (CTCs) in Kerr-Newman spacetime. We apply Gavassino's restoration principle to derive a theoretical framework for cyclic information dynamics within these extreme gravitational environment... |
0810.0297 | Tomas Liko | Tomas Liko, David Sloan | First-order action and Euclidean quantum gravity | 8 pages; v2: references added; minor corrections; v3: typos corrected
in eqns (20) and (21); v4: substantially revised; addition of NUT-charged
spacetimes; to appear in Classical and Quantum Gravity | Class.Quant.Grav.26:145004,2009 | 10.1088/0264-9381/26/14/145004 | IGC-08/10-1 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the on-shell path integral for asymptotically flat Euclidean
spacetimes can be given in the first-order formulation of general relativity,
without assuming the boundary to be isometrically embedded in Euclidean space
and without adding infinite counter-terms. For illustrative examples of our
approach, we... | [
{
"created": "Thu, 2 Oct 2008 00:09:10 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Oct 2008 20:23:40 GMT",
"version": "v2"
},
{
"created": "Sat, 1 Nov 2008 22:04:02 GMT",
"version": "v3"
},
{
"created": "Thu, 28 May 2009 21:11:28 GMT",
"version": "v4"
}
] | 2009-07-22 | [
[
"Liko",
"Tomas",
""
],
[
"Sloan",
"David",
""
]
] | We show that the on-shell path integral for asymptotically flat Euclidean spacetimes can be given in the first-order formulation of general relativity, without assuming the boundary to be isometrically embedded in Euclidean space and without adding infinite counter-terms. For illustrative examples of our approach, we e... |
gr-qc/0605077 | Eric Poisson | Roland Haas and Eric Poisson | Mode-sum regularization of the scalar self-force: Formulation in terms
of a tetrad decomposition of the singular field | 38 pages, 2 figures | Phys.Rev. D74 (2006) 044009 | 10.1103/PhysRevD.74.044009 | null | gr-qc | null | We examine the motion in Schwarzschild spacetime of a point particle endowed
with a scalar charge. The particle produces a retarded scalar field which
interacts with the particle and influences its motion via the action of a
self-force. We exploit the spherical symmetry of the Schwarzschild spacetime
and decompose th... | [
{
"created": "Fri, 12 May 2006 13:37:57 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2006 18:07:49 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Haas",
"Roland",
""
],
[
"Poisson",
"Eric",
""
]
] | We examine the motion in Schwarzschild spacetime of a point particle endowed with a scalar charge. The particle produces a retarded scalar field which interacts with the particle and influences its motion via the action of a self-force. We exploit the spherical symmetry of the Schwarzschild spacetime and decompose the ... |
1009.2064 | Jeferson de Oliveira | Owen Pavel Fern\'andez Piedra and Jeferson de Oliveira | Fermion perturbations in string-theory black holes | 24 pages, 12 figures | Class.Quant.Grav.28:085023,2011 | 10.1088/0264-9381/28/8/085023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study fermion perturbations in four dimensional black holes
of string theory, obtained either from a non-extreme configuration of three
intersecting five-branes with a boost along the common string or from a
non-extreme intersecting system of two two-branes and two five-branes. The
Dirac equation for... | [
{
"created": "Fri, 10 Sep 2010 17:39:21 GMT",
"version": "v1"
}
] | 2011-04-08 | [
[
"Piedra",
"Owen Pavel Fernández",
""
],
[
"de Oliveira",
"Jeferson",
""
]
] | In this paper we study fermion perturbations in four dimensional black holes of string theory, obtained either from a non-extreme configuration of three intersecting five-branes with a boost along the common string or from a non-extreme intersecting system of two two-branes and two five-branes. The Dirac equation for t... |
1711.06843 | lvc.publications | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C.
Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M.
Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith,
B. Allen, A. All... | All-sky search for long-duration gravitational wave transients in the
first Advanced LIGO observing run | null | null | 10.1088/1361-6382/aaab76 | P1600277 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results of a search for long-duration gravitational wave
transients in the data of the LIGO Hanford and LIGO Livingston second
generation detectors between September 2015 and January 2016, with a total
observational time of 49 days. The search targets gravitational wave transients
of \unit[10 -- 500]{s... | [
{
"created": "Sat, 18 Nov 2017 10:36:31 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Acernese",
"F... | We present the results of a search for long-duration gravitational wave transients in the data of the LIGO Hanford and LIGO Livingston second generation detectors between September 2015 and January 2016, with a total observational time of 49 days. The search targets gravitational wave transients of \unit[10 -- 500]{s} ... |
1205.3263 | Pankaj S. Joshi | Pankaj S. Joshi and Ravindra V. Saraykar | Shell-crossings in Gravitational Collapse | 4 pages, typos corrected and references added | Int.J. of Mod.Phys. Volume 22, Issue 05, April 2013,1350027 | 10.1142/S0218271813500272 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While studying the continual gravitational collapse of a massive matter cloud
in general relativity towards examining collapse final states, an important
issue is that of whether shell-crossing singularities can develop as the
collapse evolves. We examine this here to show that for any spherically
symmetric collapse ... | [
{
"created": "Tue, 15 May 2012 05:23:03 GMT",
"version": "v1"
},
{
"created": "Wed, 16 May 2012 14:54:15 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Apr 2013 15:34:14 GMT",
"version": "v3"
}
] | 2013-04-30 | [
[
"Joshi",
"Pankaj S.",
""
],
[
"Saraykar",
"Ravindra V.",
""
]
] | While studying the continual gravitational collapse of a massive matter cloud in general relativity towards examining collapse final states, an important issue is that of whether shell-crossing singularities can develop as the collapse evolves. We examine this here to show that for any spherically symmetric collapse in... |
0907.3292 | Jonathan R. Gair | Jonathan R Gair, Ilya Mandel, Alberto Sesana, Alberto Vecchio | Probing seed black holes using future gravitational-wave detectors | 14 pages, 6 figures, 2 tables, accepted for proceedings of 13th GWDAW
meeting | Class. Quantum Grav. 26 (2009) 204009 | 10.1088/0264-9381/26/20/204009 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Identifying the properties of the first generation of seeds of massive black
holes is key to understanding the merger history and growth of galaxies.
Mergers between ~100 solar mass seed black holes generate gravitational waves
in the 0.1-10Hz band that lies between the sensitivity bands of existing
ground-based dete... | [
{
"created": "Mon, 20 Jul 2009 15:05:47 GMT",
"version": "v1"
}
] | 2009-10-07 | [
[
"Gair",
"Jonathan R",
""
],
[
"Mandel",
"Ilya",
""
],
[
"Sesana",
"Alberto",
""
],
[
"Vecchio",
"Alberto",
""
]
] | Identifying the properties of the first generation of seeds of massive black holes is key to understanding the merger history and growth of galaxies. Mergers between ~100 solar mass seed black holes generate gravitational waves in the 0.1-10Hz band that lies between the sensitivity bands of existing ground-based detect... |
1408.5762 | Michele Levi | Michele Levi, Jan Steinhoff | Equivalence of ADM Hamiltonian and Effective Field Theory approaches at
next-to-next-to-leading order spin1-spin2 coupling of binary inspirals | 44 pages; v2: published | JCAP 1412 (2014) 003 | 10.1088/1475-7516/2014/12/003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The next-to-next-to-leading order spin1-spin2 potential for an inspiralling
binary, that is essential for accuracy to fourth post-Newtonian order, if both
components in the binary are spinning rapidly, has been recently derived
independently via the ADM Hamiltonian and the Effective Field Theory
approaches, using dif... | [
{
"created": "Mon, 25 Aug 2014 13:57:12 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Dec 2014 17:51:09 GMT",
"version": "v2"
}
] | 2014-12-03 | [
[
"Levi",
"Michele",
""
],
[
"Steinhoff",
"Jan",
""
]
] | The next-to-next-to-leading order spin1-spin2 potential for an inspiralling binary, that is essential for accuracy to fourth post-Newtonian order, if both components in the binary are spinning rapidly, has been recently derived independently via the ADM Hamiltonian and the Effective Field Theory approaches, using diffe... |
0803.1929 | Ignacio S\'anchez-Rodr\'iguez | Ignacio Sanchez-Rodriguez | Geometrical Structures of Space-Time in General Relativity | To appear in the AIP Conference Proceedings of the XVI International
Fall Workshop on Geometry and Physics, Lisbon - Portugal, 5-8 September 2007.
5 pages | AIPConf.Proc.1023:202-206,2008 | 10.1063/1.2958176 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space-Time in general relativity is a dynamical entity because it is subject
to the Einstein field equations. The space-time metric provides different
geometrical structures: conformal, volume, projective and linear connection. A
deep understanding of them has consequences on the dynamical role played by
geometry. We... | [
{
"created": "Thu, 13 Mar 2008 09:27:37 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sanchez-Rodriguez",
"Ignacio",
""
]
] | Space-Time in general relativity is a dynamical entity because it is subject to the Einstein field equations. The space-time metric provides different geometrical structures: conformal, volume, projective and linear connection. A deep understanding of them has consequences on the dynamical role played by geometry. We p... |
2212.13391 | Kazufumi Takahashi | Kazufumi Takahashi, Rampei Kimura, Hayato Motohashi | Consistency of matter coupling in modified gravity | 11 pages | Phys. Rev. D 107, 044018 (2023) | 10.1103/PhysRevD.107.044018 | YITP-22-134 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Matter coupling in modified gravity theories is a nontrivial issue when the
gravitational Lagrangian possesses a degeneracy structure to avoid the problem
of the Ostrogradsky ghost. Recently, this issue was addressed for bosonic
matter fields in the generalized disformal Horndeski class, which is so far the
most gene... | [
{
"created": "Tue, 27 Dec 2022 07:20:34 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Feb 2023 05:01:08 GMT",
"version": "v2"
}
] | 2023-02-14 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Kimura",
"Rampei",
""
],
[
"Motohashi",
"Hayato",
""
]
] | Matter coupling in modified gravity theories is a nontrivial issue when the gravitational Lagrangian possesses a degeneracy structure to avoid the problem of the Ostrogradsky ghost. Recently, this issue was addressed for bosonic matter fields in the generalized disformal Horndeski class, which is so far the most genera... |
2402.02534 | Francisco Lobo | Jos\'e Tarciso S. S. Junior, Francisco S. N. Lobo, Manuel E. Rodrigues | Black holes and regular black holes in coincident
$f(\mathbb{Q},\mathbb{B}_Q)$ gravity coupled to nonlinear electrodynamics | 21 pages, 10 figures. V2: 25 pages, 15 figures; discussion and
references added. Accepted for publication in EPJC | Eur. Phys. J. C 84, 332 (2024) | 10.1140/epjc/s10052-024-12696-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we consider an extension of the symmetric teleparallel
equivalent of General Relativity (STEGR), namely, $f(\mathbb{Q})$ gravity, by
including a boundary term $\mathbb{B}_Q$, where $\mathbb{Q}$ is the
non-metricity scalar. More specifically, we explore static and spherically
symmetric black hole and reg... | [
{
"created": "Sun, 4 Feb 2024 15:27:51 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Mar 2024 11:07:04 GMT",
"version": "v2"
}
] | 2024-04-01 | [
[
"Junior",
"José Tarciso S. S.",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Rodrigues",
"Manuel E.",
""
]
] | In this work, we consider an extension of the symmetric teleparallel equivalent of General Relativity (STEGR), namely, $f(\mathbb{Q})$ gravity, by including a boundary term $\mathbb{B}_Q$, where $\mathbb{Q}$ is the non-metricity scalar. More specifically, we explore static and spherically symmetric black hole and regul... |
gr-qc/9501006 | Masayuki Tanimoto | Masayuki TANIMOTO | The role of Killing-Yano tensors in supersymmetric mechanics on a curved
manifold | 15 pages, ReVTeX, 1 figure | Nucl.Phys. B442 (1995) 549-562 | 10.1016/0550-3213(95)00086-8 | TIT/HEP-277/COSMO-50 | gr-qc hep-th | null | The supersymmetric extension of charged point particle's motion is applied to
investigate symmetries of gravitational fields and electromagnetic fields. We
mainly focus on the role of the Killing- Yano tensors of both usual and
generalized types. Results obtained by systematic analysis strengthen the
connection of th... | [
{
"created": "Tue, 10 Jan 1995 12:51:51 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jan 1995 13:31:12 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"TANIMOTO",
"Masayuki",
""
]
] | The supersymmetric extension of charged point particle's motion is applied to investigate symmetries of gravitational fields and electromagnetic fields. We mainly focus on the role of the Killing- Yano tensors of both usual and generalized types. Results obtained by systematic analysis strengthen the connection of the ... |
2211.16526 | Zhen Zhong | Zhen Zhong, Vitor Cardoso, Elisa Maggio | On the instability of ultracompact horizonless spacetimes | 13 pages, 12 figures, substantial improvements and clarifications.
Results remain unchanged: this work shows that a class of compact object
models are linearly stable when light rings are present but ergoregions are
absent. Version to appear in Physical Review D | null | 10.1103/PhysRevD.107.044035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent results reporting the instability of horizonless objects
with stable light rings, we revisit the linearized stability of such
structures. In particular, we consider an exterior Kerr spacetime truncated at
a surface where Dirichlet conditions on a massless scalar are imposed.This
spacetime has ergo... | [
{
"created": "Tue, 29 Nov 2022 19:00:03 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Dec 2022 13:38:44 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Feb 2023 15:56:38 GMT",
"version": "v3"
}
] | 2023-03-01 | [
[
"Zhong",
"Zhen",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Maggio",
"Elisa",
""
]
] | Motivated by recent results reporting the instability of horizonless objects with stable light rings, we revisit the linearized stability of such structures. In particular, we consider an exterior Kerr spacetime truncated at a surface where Dirichlet conditions on a massless scalar are imposed.This spacetime has ergore... |
2311.17207 | Raikhik Das | Raikhik Das | Classical Soft Graviton Theorem to Memory Effect and Violation of
Peeling | 8 pages, LaTeX; few typos corrected | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | It has been known for some time that the asymptotic structure of spacetime
and soft theorems are closely related. To study the structure of future null
infinity, studying the classical soft graviton theorem is often quite helpful.
The memory effect at the future null infinity can be demonstrated from the
leading beha... | [
{
"created": "Tue, 28 Nov 2023 20:21:33 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2023 07:18:46 GMT",
"version": "v2"
}
] | 2023-12-01 | [
[
"Das",
"Raikhik",
""
]
] | It has been known for some time that the asymptotic structure of spacetime and soft theorems are closely related. To study the structure of future null infinity, studying the classical soft graviton theorem is often quite helpful. The memory effect at the future null infinity can be demonstrated from the leading behavi... |
2405.07480 | Tim Koslowski A | Julian Barbour, Zaza Doborjginidze, Tim Koslowski, Hemant Shukla | Complexity and Its Creation | 16 pages, Latex, 4 figures | null | null | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Except for crystalline or random structures, an agreed definition of
complexity for intermediate and hence interesting cases does not exist. We fill
this gap with a notion of complexity that characterises shapes formed by any
finite number of particles greater than or equal to the three needed to define
triangle shap... | [
{
"created": "Mon, 13 May 2024 05:47:57 GMT",
"version": "v1"
}
] | 2024-05-14 | [
[
"Barbour",
"Julian",
""
],
[
"Doborjginidze",
"Zaza",
""
],
[
"Koslowski",
"Tim",
""
],
[
"Shukla",
"Hemant",
""
]
] | Except for crystalline or random structures, an agreed definition of complexity for intermediate and hence interesting cases does not exist. We fill this gap with a notion of complexity that characterises shapes formed by any finite number of particles greater than or equal to the three needed to define triangle shapes... |
gr-qc/9506042 | Paulo Rodrigues Lima Vargas Moniz | P.V. Moniz | The Case of the Missing Wormhole State | 17 pages, Talk given at the 6th Moskow Quantum Gravity Seminar,
Moskow 12-19 June 1995, Russia; some problems with TeX fonts may occur, just
press return | Gen.Rel.Grav.28:97-115,1996 | 10.1007/BF02106857 | reduced version of DAMTP R95/19 | gr-qc | null | The issue concerning the existence of wormhole states in locally
supersymmetric minisuperspace models with matter is addressed. Wormhole states
are apparently absent in models obtained from the more general theory of N=1
supergravity with supermatter. A Hartle-Hawking type solution can be found,
even though some term... | [
{
"created": "Wed, 21 Jun 1995 14:07:25 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Moniz",
"P. V.",
""
]
] | The issue concerning the existence of wormhole states in locally supersymmetric minisuperspace models with matter is addressed. Wormhole states are apparently absent in models obtained from the more general theory of N=1 supergravity with supermatter. A Hartle-Hawking type solution can be found, even though some terms ... |
1810.06244 | Pradip Mukherjee | Pradip Mukherjee and Abdus Sattar | Constrained Hamiltonian analysis of a non relativistic Schrodinger field
coupled with C-S gravity | 19 pages, Latex. This version is to remedy a mess in v3 which is
spurious. This version is a considerably revised form of v2. Ignore v3 | Phys. Rev. D 99, 084038 (2019) | 10.1103/PhysRevD.99.084038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a constrained Hamiltonian analysis of a non relativistic
Schrodinger field in 2+1 dimensions , coupled with Chern - Simons gravity. The
coupling is achieved by the recently advanced Galilean gauge theory
\cite{BMM1},\cite{ BMM2}, \cite{BM4}. The calculations are repeated with a
truncated model to show that... | [
{
"created": "Mon, 15 Oct 2018 09:42:52 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2018 04:10:50 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Nov 2018 12:27:34 GMT",
"version": "v3"
},
{
"created": "Wed, 2 Jan 2019 04:31:47 GMT",
"version": "v4"
}
] | 2019-04-24 | [
[
"Mukherjee",
"Pradip",
""
],
[
"Sattar",
"Abdus",
""
]
] | We provide a constrained Hamiltonian analysis of a non relativistic Schrodinger field in 2+1 dimensions , coupled with Chern - Simons gravity. The coupling is achieved by the recently advanced Galilean gauge theory \cite{BMM1},\cite{ BMM2}, \cite{BM4}. The calculations are repeated with a truncated model to show that d... |
1202.2301 | Cenalo Vaz | Kinjalk Lochan, Cenalo Vaz | Canonical Partition function of Loop Black Holes | 16 pages, 1 figure. Some clarifications and references added. To
appear in Phys. Rev. D | Phys. Rev. D 85 (2012) 104041 | 10.1103/PhysRevD.85.104041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the canonical partition for quantum black holes in the approach of
Loop Quantum Gravity (LQG). We argue that any quantum theory of gravity in
which the horizon area is built of non-interacting constituents cannot yield
qualitative corrections to the Bekenstein-Hawking (B-H) area law, but
corrections to the... | [
{
"created": "Fri, 10 Feb 2012 16:40:40 GMT",
"version": "v1"
},
{
"created": "Wed, 2 May 2012 18:51:23 GMT",
"version": "v2"
}
] | 2012-06-25 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Vaz",
"Cenalo",
""
]
] | We compute the canonical partition for quantum black holes in the approach of Loop Quantum Gravity (LQG). We argue that any quantum theory of gravity in which the horizon area is built of non-interacting constituents cannot yield qualitative corrections to the Bekenstein-Hawking (B-H) area law, but corrections to the a... |
1201.6091 | Prado Martin-Moruno | Prado Martin-Moruno | Could a foliation by constant mean curvature hypersurfaces cover the
existence of most observers in our part of spacetime? | 4 pages, 1 figure, to appear in Proceedings of Spanish Relativity
Meeting 2011 (ERE 2011) held in Madrid, Spain | AIP Conf.Proc. 1458 (2011) 471-474 | 10.1063/1.4734462 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a foliation by constant mean curvature hypersurfaces of a de
Sitter space with a thin-wall Coleman-De Luccia bubble of de Sitter space
inside, which covers the existence of most observers in our part of spacetime
if we are placed in the region outside the bubble.
| [
{
"created": "Sun, 29 Jan 2012 23:56:22 GMT",
"version": "v1"
}
] | 2012-12-06 | [
[
"Martin-Moruno",
"Prado",
""
]
] | We present a foliation by constant mean curvature hypersurfaces of a de Sitter space with a thin-wall Coleman-De Luccia bubble of de Sitter space inside, which covers the existence of most observers in our part of spacetime if we are placed in the region outside the bubble. |
gr-qc/0209044 | Ion Vasile Vancea | M. C. B. Abdalla, M. A. De Andrade, M. A. Santos, I. V. Vancea | On The Symplectic Two-Form of Gravity in Terms of Dirac Eigenvalues | misprints corrected, final interpretation of results given | Phys.Lett. B548 (2002) 88-91 | 10.1016/S0370-2693(02)02817-4 | null | gr-qc | null | The Dirac eigenvalues form a subset of observables of the Euclidean gravity.
The symplectic two-form in the covariant phase space could be expressed, in
principle, in terms of the Dirac eigenvalues. We discuss the existence of the
formal solution of the equations defining the components of the symplectic form
in this... | [
{
"created": "Thu, 12 Sep 2002 20:08:20 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Sep 2002 14:50:10 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Abdalla",
"M. C. B.",
""
],
[
"De Andrade",
"M. A.",
""
],
[
"Santos",
"M. A.",
""
],
[
"Vancea",
"I. V.",
""
]
] | The Dirac eigenvalues form a subset of observables of the Euclidean gravity. The symplectic two-form in the covariant phase space could be expressed, in principle, in terms of the Dirac eigenvalues. We discuss the existence of the formal solution of the equations defining the components of the symplectic form in this f... |
1806.10902 | Sergey Paston | S.A. Paston, A.A. Sheykin | Embedding theory as new geometrical mimetic gravity | LaTeX, 11 pages | European Physical Journal C 78 (2018) 989 | 10.1140/epjc/s10052-018-6474-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that recently proposed model of mimetic gravity can be presented
as general relativity with an additional mimetic matter. We discuss a
possibility to analogously reformulate the embedding theory, which is the
geometrical description of gravity proposed by Regge and Teitelboim, treating
it also as general ... | [
{
"created": "Thu, 28 Jun 2018 11:58:58 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2018 18:35:05 GMT",
"version": "v2"
}
] | 2018-12-07 | [
[
"Paston",
"S. A.",
""
],
[
"Sheykin",
"A. A.",
""
]
] | It is known that recently proposed model of mimetic gravity can be presented as general relativity with an additional mimetic matter. We discuss a possibility to analogously reformulate the embedding theory, which is the geometrical description of gravity proposed by Regge and Teitelboim, treating it also as general re... |
1205.2001 | Cecilia Chirenti | Cecilia Chirenti, Patrick R. Silveira and Odylio D. Aguiar | Non-radial oscillations of neutron stars and the detection of
gravitational waves | 5 pages, 3 figures. Prepared for the proceedings of the 5th
International Workshop on Astronomy and Relativistic Astrophysics, Joao
Pessoa, Brazil, October 9-12, 2011 | null | 10.1142/S2010194512008185 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the non-radial oscillations of relativistic neutron stars, in
particular the (fundamental) f-modes, which are believed to be the most
relevant for the gravitational wave emission of perturbed isolated stars. The
expected frequencies of the f-modes are compared to the sensitivity range of
Mario Schenberg, the... | [
{
"created": "Wed, 9 May 2012 14:48:41 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Chirenti",
"Cecilia",
""
],
[
"Silveira",
"Patrick R.",
""
],
[
"Aguiar",
"Odylio D.",
""
]
] | We study the non-radial oscillations of relativistic neutron stars, in particular the (fundamental) f-modes, which are believed to be the most relevant for the gravitational wave emission of perturbed isolated stars. The expected frequencies of the f-modes are compared to the sensitivity range of Mario Schenberg, the B... |
gr-qc/9403007 | Hkitada | Hitoshi Kitada | Theory of Local Times II. Another formulation and examples | 22 pages, LaTeX, revised in minor descriptions | null | null | KIMS-1994-03-03 | gr-qc astro-ph hep-th | null | The model of a stationary universe and the notion of local times presented in
[10] are reviewed with some alternative formulation of the consistent
unification of the Riemannian and Euclidean geometries of general relativity
and quantum mechanics. The method of unification adopted in the present paper
is by construct... | [
{
"created": "Wed, 2 Mar 1994 13:05:49 GMT",
"version": "v1"
},
{
"created": "Mon, 22 May 1995 09:10:51 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Kitada",
"Hitoshi",
""
]
] | The model of a stationary universe and the notion of local times presented in [10] are reviewed with some alternative formulation of the consistent unification of the Riemannian and Euclidean geometries of general relativity and quantum mechanics. The method of unification adopted in the present paper is by constructin... |
0707.0201 | Trevor W. Marshall | Trevor W. Marshall | Gravitational waves versus black holes | null | null | null | null | gr-qc | null | It is argued that, in order for the gravitational field to be propagated as a
wave, it is necessary for it to satisfy a further set of field equations, in
addition to those of Einstein and Hilbert, and these equations mean there is a
preferred coordinate frame, called the Global Inertial Frame, giving rise to a
uniqu... | [
{
"created": "Mon, 2 Jul 2007 11:57:30 GMT",
"version": "v1"
}
] | 2007-07-03 | [
[
"Marshall",
"Trevor W.",
""
]
] | It is argued that, in order for the gravitational field to be propagated as a wave, it is necessary for it to satisfy a further set of field equations, in addition to those of Einstein and Hilbert, and these equations mean there is a preferred coordinate frame, called the Global Inertial Frame, giving rise to a unique ... |
0802.3314 | Carlos Kozameh | C. Kozameh, E. T. Newman, G. Silva-Ortigoza | On Extracting Physical Content from Asymptotically Flat Space-Time
Metrics | 33 pages | Class.Quant.Grav.25:145001,2008 | 10.1088/0264-9381/25/14/145001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A major issue in general relativity, from its earliest days to the present,
is how to extract physical information from any solution or class of solutions
to the Einstein equations. Though certain information can be obtained for
arbitrary solutions, e.g., via geodesic deviation, in general, because of the
coordinate ... | [
{
"created": "Fri, 22 Feb 2008 13:39:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kozameh",
"C.",
""
],
[
"Newman",
"E. T.",
""
],
[
"Silva-Ortigoza",
"G.",
""
]
] | A major issue in general relativity, from its earliest days to the present, is how to extract physical information from any solution or class of solutions to the Einstein equations. Though certain information can be obtained for arbitrary solutions, e.g., via geodesic deviation, in general, because of the coordinate fr... |
1201.4017 | Amit Ghosh | Bhramar Chatterjee and Amit Ghosh | Near-extremal black holes | 14 pages | null | 10.1007/JHEP04(2012)125 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new formulation of deriving Hawking temperature for
near-extremal black holes using distributions. In this paper the near-extremal
Reissner-Nordstrom and Kerr black holes are discussed. It is shown that the
extremal solution as a limit of non-extremal metric is well-defined. The pure
extremal case is als... | [
{
"created": "Thu, 19 Jan 2012 10:43:10 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Chatterjee",
"Bhramar",
""
],
[
"Ghosh",
"Amit",
""
]
] | We present a new formulation of deriving Hawking temperature for near-extremal black holes using distributions. In this paper the near-extremal Reissner-Nordstrom and Kerr black holes are discussed. It is shown that the extremal solution as a limit of non-extremal metric is well-defined. The pure extremal case is also ... |
1502.04630 | Shahen Hacyan | Shahen Hacyan | Effects of gravitational waves on the polarization of pulsars | null | null | 10.1142/S0217751X16410232 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polarization of electromagnetic waves in the presence of a gravitational
wave is analyzed. The rotation of the polarization angle and the Stokes
parameters are deduced. A possible application to the detection of stochastic
background of gravitational waves is proposed as a complement to the pulsar
timing method.
| [
{
"created": "Mon, 16 Feb 2015 17:08:39 GMT",
"version": "v1"
}
] | 2016-02-03 | [
[
"Hacyan",
"Shahen",
""
]
] | The polarization of electromagnetic waves in the presence of a gravitational wave is analyzed. The rotation of the polarization angle and the Stokes parameters are deduced. A possible application to the detection of stochastic background of gravitational waves is proposed as a complement to the pulsar timing method. |
1112.1057 | Alan J. Weinstein | Alan J. Weinstein (for the LIGO Scientific Collaboration, and for the
Virgo Collaboration) | Astronomy and astrophysics with gravitational waves in the Advanced
Detector Era | 10 pages, no figures. Submitted to the proceedings of the 9th Edoardo
Amaldi Conference on Gravitational Waves, and the 2011 Numerical Relativity -
Data Analysis (NRDA) meeting, held 10-15 July 2011 in Cardiff, Wales, UK,
July 10-15 2011 (Special issue of CQG). Updated in response to CQG referees
and CQG proofs... | Class. Quantum Grav. 29 (2012) 124012 | 10.1088/0264-9381/29/12/124012 | LIGO Document P1100189 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the advanced gravitational wave detectors coming on line in the next 5
years, we expect to make the first detections of gravitational waves from
astrophysical sources, and study the properties of the waves themselves as
tests of General Relativity. In addition, these gravitational waves will be
powerful tools fo... | [
{
"created": "Mon, 5 Dec 2011 20:48:11 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Feb 2012 21:35:34 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Mar 2012 21:25:14 GMT",
"version": "v3"
}
] | 2019-08-15 | [
[
"Weinstein",
"Alan J.",
"",
"for the LIGO Scientific Collaboration, and for the\n Virgo Collaboration"
]
] | With the advanced gravitational wave detectors coming on line in the next 5 years, we expect to make the first detections of gravitational waves from astrophysical sources, and study the properties of the waves themselves as tests of General Relativity. In addition, these gravitational waves will be powerful tools for ... |
gr-qc/0107085 | Hideki Ishihara | Hideki Ishihara | Big bang of the brane universe | LaTeX, 11 pages, 3 EPS figures | Phys.Rev. D66 (2002) 023513 | 10.1103/PhysRevD.66.023513 | null | gr-qc hep-th | null | Big bang of the Friedmann-Robertson-Walker (FRW)-brane universe is studied.
In contrast to the spacelike initial singularity of the usual FRW universe, the
initial singularity of the FRW-brane universe is point-like from the viewpoint
of causality including gravitational waves propagating in the bulk. Existence
of nu... | [
{
"created": "Thu, 26 Jul 2001 09:10:11 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ishihara",
"Hideki",
""
]
] | Big bang of the Friedmann-Robertson-Walker (FRW)-brane universe is studied. In contrast to the spacelike initial singularity of the usual FRW universe, the initial singularity of the FRW-brane universe is point-like from the viewpoint of causality including gravitational waves propagating in the bulk. Existence of null... |
gr-qc/0109071 | Haret Rosu | H.C. Rosu, J. Torres | A Grassmann representation of the Hubble parameter | 4 pages, no figures | Mod.Phys.Lett. A16 (2001) 2359 | 10.1142/S0217732301005357 | null | gr-qc | null | The Riccati equation for the Hubble parameter H of barotropic FRW cosmologies
in conformal time for \kappa \neq 0 spatial geometries and in comoving time for
the \kappa =0 geometry, respectively, is generalized to odd Grassmannian time
parameters. We obtain a system of simple differential equations for the four
super... | [
{
"created": "Thu, 20 Sep 2001 02:05:25 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2001 00:29:20 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Oct 2001 01:03:56 GMT",
"version": "v3"
},
{
"created": "Sun, 14 Oct 2001 21:40:39 GMT",
"version": "v4"
},
{
"cre... | 2009-11-07 | [
[
"Rosu",
"H. C.",
""
],
[
"Torres",
"J.",
""
]
] | The Riccati equation for the Hubble parameter H of barotropic FRW cosmologies in conformal time for \kappa \neq 0 spatial geometries and in comoving time for the \kappa =0 geometry, respectively, is generalized to odd Grassmannian time parameters. We obtain a system of simple differential equations for the four superco... |
2103.02519 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Slowly evolving noncommutative-geometry wormholes | 10 pages, no figures | Scientific Voyage, Vol. 1, No. 4 (2020) pp. 1-9 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper discusses noncommutative-geometry wormholes in the context of a
cosmological model due to Sung-Won Kim. An ansatz suggested by the
Friedmann-Lemaitre-Robertson-Walker (FLRW) model leads to the assumption that
the matter content can be divided into two parts, a cosmological part depending
only on time and a... | [
{
"created": "Wed, 3 Mar 2021 16:45:19 GMT",
"version": "v1"
}
] | 2021-03-04 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | This paper discusses noncommutative-geometry wormholes in the context of a cosmological model due to Sung-Won Kim. An ansatz suggested by the Friedmann-Lemaitre-Robertson-Walker (FLRW) model leads to the assumption that the matter content can be divided into two parts, a cosmological part depending only on time and a w... |
gr-qc/9903103 | Giulio Magli | Sanjay Jhingan and Giulio Magli | Gravitational collapse of fluid bodies and cosmic censorship: analytic
insights | 14 pages, one figure, references updated | null | null | null | gr-qc astro-ph | null | The present analytical understanding on the nature of the singularities which
form at the endstate of gravitational collapse of massive fluid bodies
("stars") is reviewed. Special emphasis is devoted to the issue of physical
reasonability of the models.
| [
{
"created": "Tue, 30 Mar 1999 14:25:40 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 1999 15:38:01 GMT",
"version": "v2"
},
{
"created": "Wed, 26 May 1999 10:14:07 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Jhingan",
"Sanjay",
""
],
[
"Magli",
"Giulio",
""
]
] | The present analytical understanding on the nature of the singularities which form at the endstate of gravitational collapse of massive fluid bodies ("stars") is reviewed. Special emphasis is devoted to the issue of physical reasonability of the models. |
1909.13687 | Cyril Pitrou | Cyril Pitrou, Thiago S. Pereira | Beyond scalar, vector and tensor harmonics in maximally symmetric
three-dimensional spaces | 39 pages, 2 figures | Phys. Rev. D 100, 123535 (2019) | 10.1103/PhysRevD.100.123535 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a comprehensive construction of scalar, vector and tensor
harmonics on maximally symmetric three-dimensional spaces. Our formalism relies
on the introduction of spin-weighted spherical harmonics and a generalized
helicity basis which, together, are ideal tools to decompose harmonics into
their radial and a... | [
{
"created": "Mon, 30 Sep 2019 13:33:35 GMT",
"version": "v1"
}
] | 2019-12-25 | [
[
"Pitrou",
"Cyril",
""
],
[
"Pereira",
"Thiago S.",
""
]
] | We present a comprehensive construction of scalar, vector and tensor harmonics on maximally symmetric three-dimensional spaces. Our formalism relies on the introduction of spin-weighted spherical harmonics and a generalized helicity basis which, together, are ideal tools to decompose harmonics into their radial and ang... |
1106.5205 | Leonid Grishchuk P | L. P. Grishchuk | Cosmological Sakharov Oscillations and Quantum Mechanics of the Early
Universe | 18 pages including 6 figures, submitted to Physics-Uspekhi; v.2:
additional comparisons with existing literature, scheduled for publication in
January 2012 issue of Physics-Uspekhi; v.3: corrections to match published
version | Physics-Uspekhi 55(2), 210-216 (2012), Russian original: Uspekhi
Fiz. Nauk, 182(2), 222-229 (2012) | 10.3367/UFNe.0182.2012021.0222 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a brief summary of a talk delivered at the Special Session of the
Physical Sciences Division of the Russian Academy of Sciences, Moscow, 25 May
2011. The meeting was devoted to the 90-th anniversary of A. D. Sakharov. The
focus of this contribution is on the standing-wave pattern of
quantum-mechanically gener... | [
{
"created": "Sun, 26 Jun 2011 10:11:16 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2011 14:57:05 GMT",
"version": "v2"
},
{
"created": "Thu, 17 May 2012 13:46:07 GMT",
"version": "v3"
}
] | 2012-05-18 | [
[
"Grishchuk",
"L. P.",
""
]
] | This is a brief summary of a talk delivered at the Special Session of the Physical Sciences Division of the Russian Academy of Sciences, Moscow, 25 May 2011. The meeting was devoted to the 90-th anniversary of A. D. Sakharov. The focus of this contribution is on the standing-wave pattern of quantum-mechanically generat... |
1807.06385 | Diego Rubiera-Garcia | Victor I. Afonso, Gonzalo J. Olmo, Emanuele Orazi, Diego
Rubiera-Garcia | Mapping nonlinear gravity into General Relativity with nonlinear
electrodynamics | 11 pages. v2: next discussions inserted, refs added; matches the
version accepted for publication in EPJC | null | 10.1140/epjc/s10052-018-6356-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that families of nonlinear gravity theories formulated in a
metric-affine approach and coupled to a nonlinear theory of electrodynamics can
be mapped into General Relativity (GR) coupled to another nonlinear theory of
electrodynamics. This allows to generate solutions of the former from those of
the latter us... | [
{
"created": "Tue, 17 Jul 2018 12:36:42 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Oct 2018 09:38:54 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Afonso",
"Victor I.",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Orazi",
"Emanuele",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | We show that families of nonlinear gravity theories formulated in a metric-affine approach and coupled to a nonlinear theory of electrodynamics can be mapped into General Relativity (GR) coupled to another nonlinear theory of electrodynamics. This allows to generate solutions of the former from those of the latter usin... |
1510.05820 | Kirill Krasnov | Yannick Herfray, Kirill Krasnov and Yuri Shtanov | Anisotropic singularities in chiral modified gravity | v2: published version, 42 pages, 4 figures | Class. Quantum Grav. 33 (2016) 235001 | 10.1088/0264-9381/33/23/235001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In four space-time dimensions, there exists a special infinite-parameter
family of chiral modified gravity theories. All these theories describe just
two propagating polarizations of the graviton. General Relativity with an
arbitrary cosmological constant is the only parity-invariant member of this
family. We review ... | [
{
"created": "Tue, 20 Oct 2015 10:15:36 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2016 10:27:36 GMT",
"version": "v2"
}
] | 2018-10-26 | [
[
"Herfray",
"Yannick",
""
],
[
"Krasnov",
"Kirill",
""
],
[
"Shtanov",
"Yuri",
""
]
] | In four space-time dimensions, there exists a special infinite-parameter family of chiral modified gravity theories. All these theories describe just two propagating polarizations of the graviton. General Relativity with an arbitrary cosmological constant is the only parity-invariant member of this family. We review ho... |
2005.10194 | Beatriz Elizaga Navascu\'es | Beatriz Elizaga Navascu\'es, Guillermo A. Mena Marug\'an and Santiago
Prado | Non-oscillating power spectra in Loop Quantum Cosmology | 18 pages, 1 figure | Class. Quantum Grav. 38 035001 (2021) | 10.1088/1361-6382/abc6bb | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We characterize in an analytical way the general conditions that a choice of
vacuum state for the cosmological perturbations must satisfy to lead to a power
spectrum with no scale-dependent oscillations over time. In particular, we pay
special attention to the case of cosmological backgrounds governed by effective
Lo... | [
{
"created": "Wed, 20 May 2020 17:00:26 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Feb 2021 06:32:52 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Prado",
"Santiago",
""
]
] | We characterize in an analytical way the general conditions that a choice of vacuum state for the cosmological perturbations must satisfy to lead to a power spectrum with no scale-dependent oscillations over time. In particular, we pay special attention to the case of cosmological backgrounds governed by effective Loop... |
gr-qc/0608080 | Jorma Louko | Gabor Kunstatter, Jorma Louko | Transgressing the horizons: Time operator in two-dimensional dilaton
gravity | 32 pages, 1 eps figure. v2: references and comments added | Phys.Rev.D75:024036,2007 | 10.1103/PhysRevD.75.024036 | null | gr-qc hep-th | null | We present a Dirac quantization of generic single-horizon black holes in
two-dimensional dilaton gravity. The classical theory is first partially
reduced by a spatial gauge choice under which the spatial surfaces extend from
a black or white hole singularity to a spacelike infinity. The theory is then
quantized in a ... | [
{
"created": "Wed, 16 Aug 2006 18:09:58 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Feb 2007 10:39:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kunstatter",
"Gabor",
""
],
[
"Louko",
"Jorma",
""
]
] | We present a Dirac quantization of generic single-horizon black holes in two-dimensional dilaton gravity. The classical theory is first partially reduced by a spatial gauge choice under which the spatial surfaces extend from a black or white hole singularity to a spacelike infinity. The theory is then quantized in a me... |
2104.01054 | Yurii Ignat'ev | Yu.G. Ignat'ev and I.A. Kokh | Complete cosmological model based on a asymmetric scalar Higgs doublet | 30 pages, 66 figures, 52 references | Theoret. Math. Phys., 207 514 (2021) | 10.1134/S0040577921040097 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A study of a complete cosmological model based on an asymmetric scalar
doublet represented by the classical and phantom scalar Higgs fields is carried
out. At the same time, the assumption about the nonnegativity of the expansion
rate of the Universe, which in some cases contradicts the complete system of
Einstein's ... | [
{
"created": "Tue, 30 Mar 2021 13:51:59 GMT",
"version": "v1"
}
] | 2021-04-05 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Kokh",
"I. A.",
""
]
] | A study of a complete cosmological model based on an asymmetric scalar doublet represented by the classical and phantom scalar Higgs fields is carried out. At the same time, the assumption about the nonnegativity of the expansion rate of the Universe, which in some cases contradicts the complete system of Einstein's eq... |
1703.00589 | Myungseok Eune | Myungseok Eune and Wontae Kim | Proper temperature of Schwarzschild AdS black hole revisited | 12 pages, 1 figure, version published in PLB | Physics Letters B 773 (2017) 57 | 10.1016/j.physletb.2017.08.009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Unruh temperature calculated from the global embedding of the
Schwarzschild AdS spacetime into Minkowski spacetime was identified with the
local temperature measured by a free-fall observer; however, it would be
imaginary in a certain region outside the event horizon. So, the temperature
was assumed to be zero of... | [
{
"created": "Thu, 2 Mar 2017 02:31:00 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Aug 2017 23:15:22 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Eune",
"Myungseok",
""
],
[
"Kim",
"Wontae",
""
]
] | The Unruh temperature calculated from the global embedding of the Schwarzschild AdS spacetime into Minkowski spacetime was identified with the local temperature measured by a free-fall observer; however, it would be imaginary in a certain region outside the event horizon. So, the temperature was assumed to be zero of n... |
0704.3634 | Paul Lasky | Paul Lasky, Anthony Lun | Gravitational collapse of spherically symmetric plasmas in
Einstein-Maxwell spacetimes | Accepted for publication in Phys. Rev. D | Phys.Rev.D75:104010,2007 | 10.1103/PhysRevD.75.104010 | null | gr-qc | null | We utilize a recent formulation of a spherically symmetric spacetime endowed
with a general decomposition of the energy momentum tensor [Phys. Rev. D, 75,
024031 (2007)] to derive equations governing spherically symmetric
distributions of electromagnetic matter. We show the system reduces to the
Reissner-Nordstrom sp... | [
{
"created": "Thu, 26 Apr 2007 22:15:13 GMT",
"version": "v1"
},
{
"created": "Mon, 7 May 2007 01:02:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Lasky",
"Paul",
""
],
[
"Lun",
"Anthony",
""
]
] | We utilize a recent formulation of a spherically symmetric spacetime endowed with a general decomposition of the energy momentum tensor [Phys. Rev. D, 75, 024031 (2007)] to derive equations governing spherically symmetric distributions of electromagnetic matter. We show the system reduces to the Reissner-Nordstrom spac... |
1303.3225 | Piotr Jaranowski | Piotr Jaranowski and Gerhard Sch\"afer | Dimensional regularization of local singularities in the 4th
post-Newtonian two-point-mass Hamiltonian | 6 pages, 2 figures | null | 10.1103/PhysRevD.87.081503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The article delivers the only still unknown coefficient in the 4th
post-Newtonian energy expression for binary point masses on circular orbits as
function of orbital angular frequency. Apart from a single coefficient, which
is known solely numerically, all the coefficients are given as exact numbers.
The shown Hamilt... | [
{
"created": "Wed, 13 Mar 2013 17:43:01 GMT",
"version": "v1"
}
] | 2013-05-01 | [
[
"Jaranowski",
"Piotr",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | The article delivers the only still unknown coefficient in the 4th post-Newtonian energy expression for binary point masses on circular orbits as function of orbital angular frequency. Apart from a single coefficient, which is known solely numerically, all the coefficients are given as exact numbers. The shown Hamilton... |
0705.4036 | Alexey Toporensky | A. Toporensky, P. Tretyakov | Certain aspects of regularity in scalar field cosmological dynamics | 15 pages with 4 figures; typos corrected, final version to appear in
Regular and Chaotic Dynamics | null | 10.1134/S1560354707040016 | null | gr-qc nlin.CD | null | We consider dynamics of the FRW Universe with a scalar field. Using
Maupertuis principle we find a curvature of geodesics flow and show that zones
of positive curvature exist for all considered types of scalar field potential.
Usually, phase space of systems with the positive curvature contains islands of
regular mot... | [
{
"created": "Mon, 28 May 2007 12:27:24 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2007 16:14:00 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Jul 2007 20:48:17 GMT",
"version": "v3"
}
] | 2009-11-13 | [
[
"Toporensky",
"A.",
""
],
[
"Tretyakov",
"P.",
""
]
] | We consider dynamics of the FRW Universe with a scalar field. Using Maupertuis principle we find a curvature of geodesics flow and show that zones of positive curvature exist for all considered types of scalar field potential. Usually, phase space of systems with the positive curvature contains islands of regular motio... |
gr-qc/0207029 | Sijie Gao | Sijie Gao | Late-time particle creation from gravitational collapse to an extremal
Reissner-Nordstrom black hole | revised version, 25 pages, 2 figures | Phys.Rev. D68 (2003) 044028 | 10.1103/PhysRevD.68.044028 | null | gr-qc | null | We investigate the late time behavior of particle creation from an extremal
Reissner-Nordstrom (RN) black hole formed by gravitational collapse. We
calculate explicitly the particle flux associated with a massless scalar field
at late times after the collapse. Our result shows that the expected number of
particles in... | [
{
"created": "Thu, 4 Jul 2002 16:25:42 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 2003 17:08:27 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Gao",
"Sijie",
""
]
] | We investigate the late time behavior of particle creation from an extremal Reissner-Nordstrom (RN) black hole formed by gravitational collapse. We calculate explicitly the particle flux associated with a massless scalar field at late times after the collapse. Our result shows that the expected number of particles in a... |
1909.11962 | Ben David Normann Mr. | Ben David Normann, Sigbj{\o}rn Hervik | Approaching Wonderland | 42 pages, 6 figures | Class. Quantum Grav. 37 (2020) 085002 | 10.1088/1361-6382/ab719b | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Continuing previous work, we show the existence of stable, anisotropic future
attractors in Bianchi invariant sets with a $p$-form field ($p\,\in\,\{1,3\}$)
and a perfect fluid. In particular, we consider the not previously investigated
Bianchi invariant sets $\mathcal{B}$(II), $\mathcal{B}$(IV),
$\mathcal{B}$(VII$_0... | [
{
"created": "Thu, 26 Sep 2019 07:54:47 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Mar 2020 11:58:25 GMT",
"version": "v2"
}
] | 2020-04-01 | [
[
"Normann",
"Ben David",
""
],
[
"Hervik",
"Sigbjørn",
""
]
] | Continuing previous work, we show the existence of stable, anisotropic future attractors in Bianchi invariant sets with a $p$-form field ($p\,\in\,\{1,3\}$) and a perfect fluid. In particular, we consider the not previously investigated Bianchi invariant sets $\mathcal{B}$(II), $\mathcal{B}$(IV), $\mathcal{B}$(VII$_0$)... |
1003.2617 | John Klauder | John R. Klauder | An Affinity for Affine Quantum Gravity | 14 pages, contribution to the proceedings of the conference "Gauge
Fields. Yesterday, Today, and Tomorrow", Moscow, Russia, Jan. 19-24, 2010 | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main principle of affine quantum gravity is the strict positivity of the
matrix \{\hat g_{ab}(x)\} composed of the spatial components of the local
metric operator. Canonical commutation relations are incompatible with this
principle, and they can be replaced by noncanonical, affine commutation
relations. Due to t... | [
{
"created": "Fri, 12 Mar 2010 20:48:00 GMT",
"version": "v1"
}
] | 2010-03-15 | [
[
"Klauder",
"John R.",
""
]
] | The main principle of affine quantum gravity is the strict positivity of the matrix \{\hat g_{ab}(x)\} composed of the spatial components of the local metric operator. Canonical commutation relations are incompatible with this principle, and they can be replaced by noncanonical, affine commutation relations. Due to the... |
2309.09767 | Gabriele Barca | Gabriele Barca, Giovanni Montani | Non-Singular Gravitational Collapse through Modified Heisenberg Algebra | 14 pages, 4 figures. New upload to match published version | Eur. Phys. J. C 84, 261 (2024) | 10.1140/epjc/s10052-024-12564-5 | null | gr-qc astro-ph.SR hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the effects of cut-off physics, in the form of a modified algebra
inspired by Polymer Quantum Mechanics and by the Generalized Uncertainty
Principle representation, on the collapse of a spherical dust cloud. We analyze
both the Newtonian formulation, originally developed by Hunter, and the general
relativist... | [
{
"created": "Mon, 18 Sep 2023 13:48:28 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2024 13:22:58 GMT",
"version": "v2"
}
] | 2024-03-14 | [
[
"Barca",
"Gabriele",
""
],
[
"Montani",
"Giovanni",
""
]
] | We study the effects of cut-off physics, in the form of a modified algebra inspired by Polymer Quantum Mechanics and by the Generalized Uncertainty Principle representation, on the collapse of a spherical dust cloud. We analyze both the Newtonian formulation, originally developed by Hunter, and the general relativistic... |
1606.00811 | Mengjie Wang | Mengjie Wang | Quantum and classical aspects of scalar and vector fields around black
holes | PhD thesis, 195 pages, defended in February 2016. Based on the
publications arXiv:1110.2485, arXiv:1212.2197, arXiv:1403.5160,
arXiv:1406.3536, arXiv:1510.04713, arXiv:1512.02262 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis presents recent studies on test scalar and vector fields around
black holes. It is separated in two parts according to the asymptotic
properties of the spacetime under study. In the first part, we investigate
scalar and Proca fields on an asymptotically flat background. For the Proca
field, we obtain a co... | [
{
"created": "Thu, 2 Jun 2016 19:10:32 GMT",
"version": "v1"
}
] | 2016-06-03 | [
[
"Wang",
"Mengjie",
""
]
] | This thesis presents recent studies on test scalar and vector fields around black holes. It is separated in two parts according to the asymptotic properties of the spacetime under study. In the first part, we investigate scalar and Proca fields on an asymptotically flat background. For the Proca field, we obtain a comp... |
1103.0712 | Jacques Smulevici | Gustav Holzegel, Jacques Smulevici | Self-gravitating Klein-Gordon fields in asymptotically Anti-de-Sitter
spacetimes | 50 pages, v2: minor changes, to appear in Annales Henri Poincar\'e | null | 10.1007/s00023-011-0146-8 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We initiate the study of the spherically symmetric Einstein-Klein-Gordon
system in the presence of a negative cosmological constant, a model appearing
frequently in the context of high-energy physics. Due to the lack of global
hyperbolicity of the solutions, the natural formulation of dynamics is that of
an initial b... | [
{
"created": "Thu, 3 Mar 2011 15:19:30 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Oct 2011 16:21:21 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Holzegel",
"Gustav",
""
],
[
"Smulevici",
"Jacques",
""
]
] | We initiate the study of the spherically symmetric Einstein-Klein-Gordon system in the presence of a negative cosmological constant, a model appearing frequently in the context of high-energy physics. Due to the lack of global hyperbolicity of the solutions, the natural formulation of dynamics is that of an initial bou... |
gr-qc/0205045 | Tsvi Piran | Tsvi Piran | Gamma-Ray Bursts - a Primer For Relativists | Review talk given at GR16 | null | 10.1142/9789812776556_0013 | null | gr-qc | null | Gamma-Ray Bursts (GRBs) - short bursts of 100-1MeV photons arriving from
random directions in the sky are probably the most relativistic objects
discovered so far. Still, somehow they did not attract the attention of the
relativistic community. In this short review I discuss briefly GRB observations
and show that the... | [
{
"created": "Sun, 12 May 2002 08:04:11 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Piran",
"Tsvi",
""
]
] | Gamma-Ray Bursts (GRBs) - short bursts of 100-1MeV photons arriving from random directions in the sky are probably the most relativistic objects discovered so far. Still, somehow they did not attract the attention of the relativistic community. In this short review I discuss briefly GRB observations and show that they ... |
gr-qc/0409043 | Christopher J. Fewster | C.J. Fewster | Comments on "Counter example to the quantum inequality" | 5pp REVTeX | null | null | null | gr-qc | null | In a recent preprint, Krasnikov has claimed that to show that quantum energy
inequalities (QEIs) are violated in curved spacetime situations, by considering
the example of a free massless scalar field in two-dimensional de Sitter space.
We show that this claim is incorrect, and based on misunderstandings of the
natur... | [
{
"created": "Fri, 10 Sep 2004 11:27:22 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fewster",
"C. J.",
""
]
] | In a recent preprint, Krasnikov has claimed that to show that quantum energy inequalities (QEIs) are violated in curved spacetime situations, by considering the example of a free massless scalar field in two-dimensional de Sitter space. We show that this claim is incorrect, and based on misunderstandings of the nature ... |
1705.05426 | Fumika Suzuki | Fumika Suzuki and Friedemann Queisser | Quantum tunneling of composite object coupled with quantized radiation
field | 19 pages, 6 figures, version to appear in Class. Quantum Grav | Class. Quantum Grav. 36, 055009 (2019) | 10.1088/1361-6382/ab019c | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quantum tunneling of a composite object, which has a dipole or
quadrupole moment coupled with quantized (photon or gravitational) radiation
field, through a {\delta} potential barrier. The dipole or quadrupole moment is
represented by an oscillator in the relative coordinate of two constituent
particles of t... | [
{
"created": "Mon, 15 May 2017 19:57:26 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Feb 2018 22:59:06 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jan 2019 20:52:51 GMT",
"version": "v3"
}
] | 2019-02-12 | [
[
"Suzuki",
"Fumika",
""
],
[
"Queisser",
"Friedemann",
""
]
] | We study quantum tunneling of a composite object, which has a dipole or quadrupole moment coupled with quantized (photon or gravitational) radiation field, through a {\delta} potential barrier. The dipole or quadrupole moment is represented by an oscillator in the relative coordinate of two constituent particles of the... |
1501.05523 | Jibril Ben Achour | Jibril Ben Achour, Karim Noui | Analytic continuation of real Loop Quantum Gravity : Lessons from black
hole thermodynamics | 8 pages, 1 figure, Proceedings of Frontiers of Fundamental Physics
2014 - Proceedings of Science (PoS) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This contribution is devoted to summarize the recent results obtained in the
construction of an "analytic continuation" of Loop Quantum Gravity (LQG). By
this, we mean that we construct analytic continuation of physical quantities in
LQG from real values of the Barbero-Immirzi parameter $\gamma$ to the purely
imagina... | [
{
"created": "Thu, 22 Jan 2015 15:03:11 GMT",
"version": "v1"
}
] | 2015-01-23 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Noui",
"Karim",
""
]
] | This contribution is devoted to summarize the recent results obtained in the construction of an "analytic continuation" of Loop Quantum Gravity (LQG). By this, we mean that we construct analytic continuation of physical quantities in LQG from real values of the Barbero-Immirzi parameter $\gamma$ to the purely imaginary... |
1302.6407 | Puxun Wu | Kaituo Zhang, Puxun Wu, Hongwei Yu | Oscillating universe in massive gravity | 36 pages, 30 figures, accepted for publication in PRD. Two references
added | Physical Review D 87, 063513 (2013) | 10.1103/PhysRevD.87.063513 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Massive gravity is a modified theory of general relativity. In this paper, we
study, using a method in which the scale factor changes as a particle in a
"potential", all possible cosmic evolutions in a ghost-free massive gravity. We
find that there exists, in certain circumstances, an oscillating universe or a
bounci... | [
{
"created": "Tue, 26 Feb 2013 11:52:46 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Mar 2013 11:51:59 GMT",
"version": "v2"
}
] | 2013-03-21 | [
[
"Zhang",
"Kaituo",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | Massive gravity is a modified theory of general relativity. In this paper, we study, using a method in which the scale factor changes as a particle in a "potential", all possible cosmic evolutions in a ghost-free massive gravity. We find that there exists, in certain circumstances, an oscillating universe or a bouncing... |
1609.05183 | Kayll Lake | Dmitri Lebedev and Kayll Lake | Relativistic Aberration and the Cosmological Constant in Gravitational
Lensing I: Introduction | revtex with 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An analysis of null geodesics in Schwarzschild de Sitter space is presented
with special attention to their global `bending angles', local measurable
angles, and the involvement of the cosmological constant. We make use of a
general technique which allows for finding observable intersection angles of
null trajectorie... | [
{
"created": "Fri, 16 Sep 2016 19:16:52 GMT",
"version": "v1"
}
] | 2016-09-19 | [
[
"Lebedev",
"Dmitri",
""
],
[
"Lake",
"Kayll",
""
]
] | An analysis of null geodesics in Schwarzschild de Sitter space is presented with special attention to their global `bending angles', local measurable angles, and the involvement of the cosmological constant. We make use of a general technique which allows for finding observable intersection angles of null trajectories ... |
1105.1803 | Alexander Goltsev | Natalia Gorobey and Alexander Lukyanenko | On the Quantum Creation of Matter in the Expanding Universe | 4 pages | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum Action Principle which has been used as a ground for a probabilistic
interpretation of one-particle relativistic quantum mechanics \cite{GLL} is
applied to quantum cosmology. The quantum creation of matter in a
minisuperspace model with one homogeneous scalar field is considered. The
initial state of the univ... | [
{
"created": "Mon, 9 May 2011 21:55:12 GMT",
"version": "v1"
}
] | 2011-05-11 | [
[
"Gorobey",
"Natalia",
""
],
[
"Lukyanenko",
"Alexander",
""
]
] | Quantum Action Principle which has been used as a ground for a probabilistic interpretation of one-particle relativistic quantum mechanics \cite{GLL} is applied to quantum cosmology. The quantum creation of matter in a minisuperspace model with one homogeneous scalar field is considered. The initial state of the univer... |
gr-qc/0403050 | Alexander Poltorak | Alexander Poltorak | Towards a Covariant Theory of Gravitation | 6 pages, LaTeX, GR9 Abstract (1980) | 9th International Conference on General Relativity and
Gravitation, Abstracts of Contributed Papers, Jena, GDR, 1980, v.2, p.516 | null | null | gr-qc | null | A covariant reformulation of General Relativity is briefly considered from
three points of view: geometrodynamics, Lagrange-Euler field theory, and gauge
field theory. From a geometrodynamics perspective, a definition of the
reference frame as a differential manifold with an affine connection results in
separation of... | [
{
"created": "Fri, 12 Mar 2004 03:09:46 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 2004 22:24:24 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Mar 2004 22:28:19 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Poltorak",
"Alexander",
""
]
] | A covariant reformulation of General Relativity is briefly considered from three points of view: geometrodynamics, Lagrange-Euler field theory, and gauge field theory. From a geometrodynamics perspective, a definition of the reference frame as a differential manifold with an affine connection results in separation of t... |
1901.00002 | Iver Brevik | Iver Brevik and Mubasher Jamil | Black Holes in the Turbulent Phase of Viscous Rip Cosmology | 7 pages latex 2e, no figures; to appear in Int. J. Geom. Meth. Mod.
Phys | Int. J. Geom. Meth. Mod. Phys. 16 (2019) 1950030 | 10.1142/S0219887819500300 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phantom fluid in the late universe, thus assuming the equation
of state parameter $w$ to be less than $-1$. The fluid is assumed to consist of
two components, one laminar component $\rho$ and one turbulent component
$\rho_T$, the latter set proportional to $\rho$ as well as to the Hubble
parameter, $\rho... | [
{
"created": "Mon, 31 Dec 2018 14:24:35 GMT",
"version": "v1"
}
] | 2019-01-21 | [
[
"Brevik",
"Iver",
""
],
[
"Jamil",
"Mubasher",
""
]
] | We study the phantom fluid in the late universe, thus assuming the equation of state parameter $w$ to be less than $-1$. The fluid is assumed to consist of two components, one laminar component $\rho$ and one turbulent component $\rho_T$, the latter set proportional to $\rho$ as well as to the Hubble parameter, $\rho_T... |
2209.01056 | Taylor Ordines | Taylor M. Ordines and Eric D. Carlson | Argument for the radiation-dominated behavior of matter fields in the
preinflationary era | null | null | 10.1103/PhysRevD.106.103537 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the leading-order behavior of matter fields in the
preinflationary era using the semiclassical approximation. Many inflationary
models assume without supporting arguments that the Universe was radiation
dominated prior to inflation, leading to modifications of cosmological
observables, such as the Cosm... | [
{
"created": "Fri, 2 Sep 2022 13:45:07 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2022 13:52:04 GMT",
"version": "v2"
}
] | 2022-12-14 | [
[
"Ordines",
"Taylor M.",
""
],
[
"Carlson",
"Eric D.",
""
]
] | We investigate the leading-order behavior of matter fields in the preinflationary era using the semiclassical approximation. Many inflationary models assume without supporting arguments that the Universe was radiation dominated prior to inflation, leading to modifications of cosmological observables, such as the Cosmic... |
gr-qc/9706038 | R. Loll | R. Loll (AEI, Potsdam) | Simplifying the spectral analysis of the volume operator | 19 pages, TeX, to be published in Nucl. Phys. B | Nucl.Phys. B500 (1997) 405-420 | 10.1016/S0550-3213(97)00334-9 | AEI-030 | gr-qc | null | The volume operator plays a central role in both the kinematics and dynamics
of canonical approaches to quantum gravity which are based on algebras of
generalized Wilson loops. We introduce a method for simplifying its spectral
analysis, for quantum states that can be realized on a cubic three-dimensional
lattice. Th... | [
{
"created": "Fri, 13 Jun 1997 15:31:17 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Loll",
"R.",
"",
"AEI, Potsdam"
]
] | The volume operator plays a central role in both the kinematics and dynamics of canonical approaches to quantum gravity which are based on algebras of generalized Wilson loops. We introduce a method for simplifying its spectral analysis, for quantum states that can be realized on a cubic three-dimensional lattice. This... |
gr-qc/9401027 | null | Michele Maggiore | Black Holes as Quantum Membranes | 40 pages, Latex file + 6 figures | Nucl.Phys.B429:205-228,1994 | 10.1016/S0550-3213(94)80047-2 | IFUP-TH 6/94 | gr-qc hep-th | null | We propose a quantum description of black holes. The degrees of freedom to be
quantized are identified with the microscopic degrees of freedom of the
horizon, and their dynamics is governed by the action of the relatistic bosonic
membrane in $D=4$. We find that a consistent and plausible description emerges,
both at ... | [
{
"created": "Tue, 25 Jan 1994 18:10:08 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Maggiore",
"Michele",
""
]
] | We propose a quantum description of black holes. The degrees of freedom to be quantized are identified with the microscopic degrees of freedom of the horizon, and their dynamics is governed by the action of the relatistic bosonic membrane in $D=4$. We find that a consistent and plausible description emerges, both at th... |
1208.1314 | Lap-Ming Lin | Y.-H. Sham, L.-M. Lin, P. T. Leung | Radial oscillations and stability of compact stars in Eddington-inspired
Born-Infeld gravity | Minor changes to match the published version | Phys. Rev. D86:064015, 2012 | 10.1103/PhysRevD.86.064015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the hydrostatic equilibrium structure of compact stars in the
Eddington-inspired Born-Infeld gravity recently proposed by Banados and
Ferreira [Phys. Rev. Lett. 105, 011101 (2010)]. We also develop a framework to
study the radial perturbations and stability of compact stars in this theory.
We find that the s... | [
{
"created": "Tue, 7 Aug 2012 01:30:35 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Sep 2012 00:56:07 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Sham",
"Y. -H.",
""
],
[
"Lin",
"L. -M.",
""
],
[
"Leung",
"P. T.",
""
]
] | We study the hydrostatic equilibrium structure of compact stars in the Eddington-inspired Born-Infeld gravity recently proposed by Banados and Ferreira [Phys. Rev. Lett. 105, 011101 (2010)]. We also develop a framework to study the radial perturbations and stability of compact stars in this theory. We find that the sta... |
gr-qc/0510020 | Mark A. Miller | Mark Miller | General Relativistic Decompression of Binary Neutron Stars During
Dynamic Inspiral | Figure replaced, final published version. Dedicated to Rafael Sorkin
on his 60th birthday | Phys.Rev.D75:024001,2007 | 10.1103/PhysRevD.75.024001 | null | gr-qc astro-ph | null | We investigate the dynamic stability of inspiraling neutron stars by
performing multiple-orbit numerical relativity simulations of the binary
neutron star inspiral process. By introducing eccentricities in the orbits of
the neutron stars, significant changes in orbital separation are obtained
within orbital timescale... | [
{
"created": "Wed, 5 Oct 2005 20:15:06 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jan 2007 18:49:19 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Miller",
"Mark",
""
]
] | We investigate the dynamic stability of inspiraling neutron stars by performing multiple-orbit numerical relativity simulations of the binary neutron star inspiral process. By introducing eccentricities in the orbits of the neutron stars, significant changes in orbital separation are obtained within orbital timescales.... |
0704.0488 | Muhammad Sharif | M. Sharif and M. Jamil Amir | Teleparallel Version of the Stationary Axisymmetric Solutions and their
Energy Contents | 18 pages, accepted for publication in Gen. Relativ. Grav | Gen.Rel.Grav.39:989-1002,2007 | 10.1007/s10714-007-0431-5 | null | gr-qc | null | This work contains the teleparallel version of the stationary axisymmetric
solutions. We obtain the tetrad and the torsion fields representing these
solutions. The tensor, vector and axial-vector parts of the torsion tensor are
evaluated. It is found that the axial-vector has component only along $\rho$
and $z$ direc... | [
{
"created": "Wed, 4 Apr 2007 02:49:33 GMT",
"version": "v1"
}
] | 2010-03-18 | [
[
"Sharif",
"M.",
""
],
[
"Amir",
"M. Jamil",
""
]
] | This work contains the teleparallel version of the stationary axisymmetric solutions. We obtain the tetrad and the torsion fields representing these solutions. The tensor, vector and axial-vector parts of the torsion tensor are evaluated. It is found that the axial-vector has component only along $\rho$ and $z$ directi... |
gr-qc/9610008 | Abhay Ashtekar | Abhay Ashtekar | Large quantum gravity effects: Unexpected limitations of the classical
theory | 8 pages, No figures, ReVTeX | Phys.Rev.Lett. 77 (1996) 4864-4867 | 10.1103/PhysRevLett.77.4864 | CGPG/10-1 | gr-qc hep-th | null | 3-dimensional gravity coupled to Maxwell (or Klein-Gordon) fields is exactly
soluble under the assumption of axi-symmetry. The solution is used to probe
several quantum gravity issues. In particular, it is shown that the quantum
fluctuations in the geometry are large unless the number and frequency of
photons satisfy... | [
{
"created": "Tue, 8 Oct 1996 19:54:47 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Ashtekar",
"Abhay",
""
]
] | 3-dimensional gravity coupled to Maxwell (or Klein-Gordon) fields is exactly soluble under the assumption of axi-symmetry. The solution is used to probe several quantum gravity issues. In particular, it is shown that the quantum fluctuations in the geometry are large unless the number and frequency of photons satisfy t... |
gr-qc/0508091 | Jerzy Lewandowski | Wojciech Kaminski, Jerzy Lewandowski and Marcin Bobienski | Background independent quantizations: the scalar field I | 13 pages, minor corrections were made in the revised version | Class.Quant.Grav. 23 (2006) 2761-2770 | 10.1088/0264-9381/23/9/001 | null | gr-qc hep-th math-ph math.MP | null | We are concerned with the issue of quantization of a scalar field in a
diffeomorphism invariant manner. We apply the method used in Loop Quantum
Gravity. It relies on the specific choice of scalar field variables referred to
as the polymer variables. The quantization, in our formulation, amounts to
introducing the `q... | [
{
"created": "Sun, 21 Aug 2005 23:06:24 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Aug 2005 14:59:48 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Kaminski",
"Wojciech",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Bobienski",
"Marcin",
""
]
] | We are concerned with the issue of quantization of a scalar field in a diffeomorphism invariant manner. We apply the method used in Loop Quantum Gravity. It relies on the specific choice of scalar field variables referred to as the polymer variables. The quantization, in our formulation, amounts to introducing the `qua... |
1709.06892 | Muhammad Ilyas Mr. | M. Z. Bhatti, Z. Yousaf, M. Ilyas | Evolution of Compact Stars and Dark Dynamical Variables | 18 pages, 4 figures, version accepted for publication in European
Physical Journal C | Eur. Phys. J. C 77, 690 (2017) | 10.1140/epjc/s10052-017-5236-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is aimed to explore the dark dynamical effects of $f(R,T)$ modified
gravity theory on the dynamics of compact celestial star. We have taken the
interior geometry as spherical star which is filled with imperfect fluid
distribution. The modified field equations are explored by taking a particular
form of $f(R... | [
{
"created": "Tue, 19 Sep 2017 12:29:52 GMT",
"version": "v1"
}
] | 2017-11-09 | [
[
"Bhatti",
"M. Z.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Ilyas",
"M.",
""
]
] | This work is aimed to explore the dark dynamical effects of $f(R,T)$ modified gravity theory on the dynamics of compact celestial star. We have taken the interior geometry as spherical star which is filled with imperfect fluid distribution. The modified field equations are explored by taking a particular form of $f(R,T... |
gr-qc/0612133 | Sante Carloni | Sante Carloni, Peter K. S. Dunsby | The evolution of tensor perturbations in scalar-tensor theories of
gravity | 11 pages, 2 figures, submitted to Physical Review D | Phys.Rev.D75:064012,2007 | 10.1103/PhysRevD.75.064012 | null | gr-qc astro-ph hep-th | null | The evolution equations for tensor perturbations in a generic scalar tensor
theory of gravity are presented. Exact solution are given for a specific class
of theories and Friedmann-Lema\^{i}tre-Robertson-Walker backgrounds. In these
cases it is shown that, although the evolution of tensor models depends on the
choice... | [
{
"created": "Thu, 21 Dec 2006 11:52:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Carloni",
"Sante",
""
],
[
"Dunsby",
"Peter K. S.",
""
]
] | The evolution equations for tensor perturbations in a generic scalar tensor theory of gravity are presented. Exact solution are given for a specific class of theories and Friedmann-Lema\^{i}tre-Robertson-Walker backgrounds. In these cases it is shown that, although the evolution of tensor models depends on the choice o... |
1604.02451 | Farook Rahaman | Alireza Sepehri, Farook Rahaman, Salvatore Capozziello, Ahmed Farag
Ali, Anirudh Pradhan | Emergence and oscillation of cosmic space by joining M1-branes | 16 pages. 4 figures. Accepted in Eur.Phys.J.C | null | 10.1140/epjc/s10052-016-4084-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it has been proposed by Padmanabhan that the difference between the
number of degrees of freedom on the boundary surface and the number of degrees
of freedom in a bulk region leads to the expansion of the universe. Now, a
natural question arises, how this model could explain the oscillation of
universe betw... | [
{
"created": "Fri, 8 Apr 2016 08:59:50 GMT",
"version": "v1"
}
] | 2016-05-25 | [
[
"Sepehri",
"Alireza",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Ali",
"Ahmed Farag",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | Recently, it has been proposed by Padmanabhan that the difference between the number of degrees of freedom on the boundary surface and the number of degrees of freedom in a bulk region leads to the expansion of the universe. Now, a natural question arises, how this model could explain the oscillation of universe betwee... |
1702.02349 | Dnyaneshwar Pawar Dr | P. K. Agrawal and D. D. Pawar | Plane Symmetric Cosmological Model with Quark and Strange Quark Matter
in f(R,T) Theory of Gravity | Accepted for publication in Journal of Astrophysics and Astronomy,
August 2016 | null | 10.1007/s12036-016-9420-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We studied plane symmetric cosmological model in the presence of quark and
strange quark matter with the help of f(R,T) theory. To decipher solutions of
Plane symmetric space-time, we used power law relation between scale factor and
deceleration parameter. We considered the special law of variation of Hubble's
parame... | [
{
"created": "Wed, 8 Feb 2017 10:04:09 GMT",
"version": "v1"
}
] | 2017-03-22 | [
[
"Agrawal",
"P. K.",
""
],
[
"Pawar",
"D. D.",
""
]
] | We studied plane symmetric cosmological model in the presence of quark and strange quark matter with the help of f(R,T) theory. To decipher solutions of Plane symmetric space-time, we used power law relation between scale factor and deceleration parameter. We considered the special law of variation of Hubble's paramete... |
2403.12679 | Francesco Sannino | Manuel Del Piano, Stefan Hohenegger and Francesco Sannino | Effective Metric Descriptions of Quantum Black Holes | 24 pages, 4 figures | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In a recent work [arXiv:2307.13489 [gr-qc]], we have described spherically
symmetric and static quantum black holes as deformations of the classical
Schwarzschild metric that depend on the physical distance to the horizon. We
have developed a framework that allows to compute the latter in a
self-consistent fashion fr... | [
{
"created": "Tue, 19 Mar 2024 12:30:38 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"Del Piano",
"Manuel",
""
],
[
"Hohenegger",
"Stefan",
""
],
[
"Sannino",
"Francesco",
""
]
] | In a recent work [arXiv:2307.13489 [gr-qc]], we have described spherically symmetric and static quantum black holes as deformations of the classical Schwarzschild metric that depend on the physical distance to the horizon. We have developed a framework that allows to compute the latter in a self-consistent fashion from... |
gr-qc/9906126 | Steven Carlip | S. Carlip | Entropy from Conformal Field Theory at Killing Horizons | 26 pages, LaTeX; corrected typo and minor changes in Misner string
section | Class.Quant.Grav.16:3327-3348,1999 | 10.1088/0264-9381/16/10/322 | UCD-99-12, NSF-ITP-99-069 | gr-qc hep-th | null | On a manifold with boundary, the constraint algebra of general relativity may
acquire a central extension, which can be computed using covariant phase space
techniques. When the boundary is a (local) Killing horizon, a natural set of
boundary conditions leads to a Virasoro subalgebra with a calculable central
charge.... | [
{
"created": "Wed, 30 Jun 1999 23:53:02 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Aug 1999 23:24:59 GMT",
"version": "v2"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | On a manifold with boundary, the constraint algebra of general relativity may acquire a central extension, which can be computed using covariant phase space techniques. When the boundary is a (local) Killing horizon, a natural set of boundary conditions leads to a Virasoro subalgebra with a calculable central charge. C... |
2112.06626 | Yakov Shnir | J. Kunz, V. Loiko and Ya. Shnir | $U(1)$ gauged boson stars in the Einstein-Friedberg-Lee-Sirlin model | 18 pages, 8 figures | null | 10.1103/PhysRevD.105.085013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically symmetric $U(1)$ gauged boson stars in the
two-component scalar Friedberg-Lee-Sirlin model with a symmetry breaking
potential in 3+1 dimensional spacetime. Depending on the relative strength of
gravity and the electromagnetic interaction, the resulting boson stars exhibit
either the typical pr... | [
{
"created": "Mon, 13 Dec 2021 13:10:32 GMT",
"version": "v1"
}
] | 2022-05-04 | [
[
"Kunz",
"J.",
""
],
[
"Loiko",
"V.",
""
],
[
"Shnir",
"Ya.",
""
]
] | We consider spherically symmetric $U(1)$ gauged boson stars in the two-component scalar Friedberg-Lee-Sirlin model with a symmetry breaking potential in 3+1 dimensional spacetime. Depending on the relative strength of gravity and the electromagnetic interaction, the resulting boson stars exhibit either the typical prop... |
gr-qc/0609005 | Antonio Brotas | A. Brotas | Fishing in Black Holes | 4 pages, plain LaTex | null | null | null | gr-qc | null | The coordinate system $(\bar{x},\bar{t})$ defined by $r = 2m + K\bar{x}- c K
\bar{t}$ and $t=\bar{x}/cK - 1 /cK \int_{r_a}^r (1- 2m/r + K^2)^{1/2} (1 -
2m/r)^{-1}dr$ allow us to write the Schwarzschild metric in the form:
\[ds^2=c^2 d\bar{t}^2 + (W^2/K^2 - 2W/K) d\bar{x}^2 + 2c (1 + W/K)
d\bar{x}d\bar{t} - r^2 (d\the... | [
{
"created": "Fri, 1 Sep 2006 13:05:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brotas",
"A.",
""
]
] | The coordinate system $(\bar{x},\bar{t})$ defined by $r = 2m + K\bar{x}- c K \bar{t}$ and $t=\bar{x}/cK - 1 /cK \int_{r_a}^r (1- 2m/r + K^2)^{1/2} (1 - 2m/r)^{-1}dr$ allow us to write the Schwarzschild metric in the form: \[ds^2=c^2 d\bar{t}^2 + (W^2/K^2 - 2W/K) d\bar{x}^2 + 2c (1 + W/K) d\bar{x}d\bar{t} - r^2 (d\theta... |
1812.04505 | Dennis R\"atzel | Fabienne Schneiter, Dennis R\"atzel, Daniel Braun | Rotation of polarization in the gravitational field of a laser beam -
Faraday effect and optical activity | null | null | 10.1088/1361-6382/ab3523 | null | gr-qc hep-th physics.optics quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the rotation of the polarization of a light ray propagating in
the gravitational field of a circularly polarized laser beam. The rotation
consists of a reciprocal part due to gravitational optical activity, and a
non-reciprocal part due to the gravitational Faraday effect. We discuss how to
distinguish... | [
{
"created": "Tue, 11 Dec 2018 16:00:57 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Feb 2019 10:43:30 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Schneiter",
"Fabienne",
""
],
[
"Rätzel",
"Dennis",
""
],
[
"Braun",
"Daniel",
""
]
] | We investigate the rotation of the polarization of a light ray propagating in the gravitational field of a circularly polarized laser beam. The rotation consists of a reciprocal part due to gravitational optical activity, and a non-reciprocal part due to the gravitational Faraday effect. We discuss how to distinguish t... |
1603.00172 | Thomas Krajewski | Thomas Krajewski, Reiko Toriumi | Exact Renormalisation Group Equations and Loop Equations for Tensor
Models | null | SIGMA 12 (2016), 068, 36 pages | 10.3842/SIGMA.2016.068 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-sa/4.0/ | In this paper, we review some general formulations of exact renormalisation
group equations and loop equations for tensor models and tensorial group field
theories. We illustrate the use of these equations in the derivation of the
leading order expectation values of observables in tensor models. Furthermore,
we use t... | [
{
"created": "Tue, 1 Mar 2016 07:57:48 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jul 2016 06:27:13 GMT",
"version": "v2"
}
] | 2016-07-19 | [
[
"Krajewski",
"Thomas",
""
],
[
"Toriumi",
"Reiko",
""
]
] | In this paper, we review some general formulations of exact renormalisation group equations and loop equations for tensor models and tensorial group field theories. We illustrate the use of these equations in the derivation of the leading order expectation values of observables in tensor models. Furthermore, we use the... |
2103.07777 | Anna Chrysostomou | Chun-Hung Chen, Hing-Tong Cho, Anna Chrysostomou and Alan S. Cornell | Quasinormal modes for integer and half-integer spins within the large
angular momentum limit | 46 pages; added commentary on implementation procedure in Sec. III-A
(results unchanged); references added; to appear in Physical Review D (PRD) | Phys. Rev. D 104, 024009 (2021) | 10.1103/PhysRevD.104.024009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While independent observations have been made regarding the behaviour of
effective quasinormal mode (QNM) potentials within the large angular momentum
limit, we demonstrate analytically here that a uniform expression emerges for
non-rotating, higher-dimensional, and spherically-symmetric black holes (BHs)
in this reg... | [
{
"created": "Sat, 13 Mar 2021 19:28:12 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2021 13:08:00 GMT",
"version": "v2"
}
] | 2021-07-14 | [
[
"Chen",
"Chun-Hung",
""
],
[
"Cho",
"Hing-Tong",
""
],
[
"Chrysostomou",
"Anna",
""
],
[
"Cornell",
"Alan S.",
""
]
] | While independent observations have been made regarding the behaviour of effective quasinormal mode (QNM) potentials within the large angular momentum limit, we demonstrate analytically here that a uniform expression emerges for non-rotating, higher-dimensional, and spherically-symmetric black holes (BHs) in this regim... |
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