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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1908.05306 | Eric D. Carlson | Sarah B. Fisher and Eric D. Carlson | Reexamining $f(R,T)$ gravity | null | Phys. Rev. D 100, 064059 (2019) | 10.1103/PhysRevD.100.064059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study $f(R,T)$ gravity, in which the curvature $R$ appearing in the
gravitational Lagrangian is replaced by an arbitrary function of the curvature
and the trace $T$ of the stress-energy tensor. We focus primarily on situations
where $f$ is separable, so that $f(R,T) = f_1(R) + f_2(T)$. We argue that the
term $f_2(... | [
{
"created": "Wed, 14 Aug 2019 18:49:05 GMT",
"version": "v1"
}
] | 2019-10-02 | [
[
"Fisher",
"Sarah B.",
""
],
[
"Carlson",
"Eric D.",
""
]
] | We study $f(R,T)$ gravity, in which the curvature $R$ appearing in the gravitational Lagrangian is replaced by an arbitrary function of the curvature and the trace $T$ of the stress-energy tensor. We focus primarily on situations where $f$ is separable, so that $f(R,T) = f_1(R) + f_2(T)$. We argue that the term $f_2(T)... |
0911.1274 | Enrico Barausse | Enrico Barausse | The importance of precession in modelling the direction of the final
spin from a black-hole merger | 6 pages, 2 figures. Panel added to fig 2, discussion extended to
comply with referee's comments. Version accepted for publication as
proceeding of the 8th Amaldi International Conference on Gravitational Waves,
NYC, 21-26 June 2009 | J.Phys.Conf.Ser.228:012050,2010 | 10.1088/1742-6596/228/1/012050 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The prediction of the spin of the black hole resulting from the merger of a
generic black-hole binary system is of great importance to study the
cosmological evolution of supermassive black holes. Several attempts have been
recently made to model the spin via simple expressions exploiting the results
of numerical-rel... | [
{
"created": "Fri, 6 Nov 2009 15:24:05 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Feb 2010 02:39:27 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Barausse",
"Enrico",
""
]
] | The prediction of the spin of the black hole resulting from the merger of a generic black-hole binary system is of great importance to study the cosmological evolution of supermassive black holes. Several attempts have been recently made to model the spin via simple expressions exploiting the results of numerical-relat... |
gr-qc/9406006 | Steve Carlip | S. Carlip and R. Cosgrove | Topology Change in (2+1)-Dimensional Gravity | 19 pages of text plus 4 pages of figures, LaTeX (using epsf),
UCD-11-94 | J.Math.Phys.35:5477-5493,1994 | 10.1063/1.530760 | null | gr-qc | null | In (2+1)-dimensional general relativity, the path integral for a manifold $M$
can be expressed in terms of a topological invariant, the Ray-Singer torsion of
a flat bundle over $M$. For some manifolds, this makes an explicit computation
of transition amplitudes possible. In this paper, we evaluate the amplitude for
a... | [
{
"created": "Fri, 3 Jun 1994 19:11:14 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
],
[
"Cosgrove",
"R.",
""
]
] | In (2+1)-dimensional general relativity, the path integral for a manifold $M$ can be expressed in terms of a topological invariant, the Ray-Singer torsion of a flat bundle over $M$. For some manifolds, this makes an explicit computation of transition amplitudes possible. In this paper, we evaluate the amplitude for a s... |
2210.06981 | Raymond Isichei | Raymond Isichei | Approaches To Quantum Cosmology: A Review | 65 pages, 7 figures. This work was submitted as an MSc Thesis at
Imperial College London | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of the path integral approach to quantum cosmology and its relation
to canonical quantisation. The initial derivation of the Hartle-Hawking and
Vilenkin wavefunctions from the Euclidean Einstein-Hilbert action, and later,
from the Lorentzian path integral using Picard-Lefshets Theory is discussed.
Path integ... | [
{
"created": "Tue, 11 Oct 2022 16:19:22 GMT",
"version": "v1"
}
] | 2022-10-14 | [
[
"Isichei",
"Raymond",
""
]
] | A review of the path integral approach to quantum cosmology and its relation to canonical quantisation. The initial derivation of the Hartle-Hawking and Vilenkin wavefunctions from the Euclidean Einstein-Hilbert action, and later, from the Lorentzian path integral using Picard-Lefshets Theory is discussed. Path integra... |
gr-qc/9407025 | Paulo Rodrigues Lima Vargas Moniz | O. Bertolami and P.V. Moniz | Decoherence of Homogeneous and Isotropic Geometries in the Presence of
Massive Vector Fields | 5 pages, DFFCUL 01-07/1993 DF/IST 12.93 | null | null | null | gr-qc | null | Decoherence of Friedmann-Robertson-Walker (FRW) geometries due to massive
vector fields with $SO(3)$ global symmetry is discussed in the context of
Quantum Cosmology. (Talk presented at the 3rd National Meeting of Astronomy and
Astrophysics, July 1993, IST, Lisboa, Portugal. -- A more complete version will
be present... | [
{
"created": "Wed, 20 Jul 1994 14:33:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bertolami",
"O.",
""
],
[
"Moniz",
"P. V.",
""
]
] | Decoherence of Friedmann-Robertson-Walker (FRW) geometries due to massive vector fields with $SO(3)$ global symmetry is discussed in the context of Quantum Cosmology. (Talk presented at the 3rd National Meeting of Astronomy and Astrophysics, July 1993, IST, Lisboa, Portugal. -- A more complete version will be presented... |
gr-qc/0701104 | Istvan Racz | Istvan Racz | Stationary Black Holes as Holographs | 31 pages, LaTeX; typos corrected, new references added, to appear in
CQG | Class.Quant.Grav.24:5541-5572,2007 | 10.1088/0264-9381/24/22/016 | null | gr-qc hep-th | null | Smooth spacetimes possessing a (global) one-parameter group of isometries and
an associated Killing horizon in Einstein's theory of gravity are investigated.
No assumption concerning the asymptotic structure is made, thereby, the
selected spacetimes may be considered as generic distorted stationary black
holes. First... | [
{
"created": "Thu, 18 Jan 2007 13:36:08 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2007 09:07:11 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Jul 2007 05:50:03 GMT",
"version": "v3"
},
{
"created": "Thu, 20 Sep 2007 10:43:00 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Racz",
"Istvan",
""
]
] | Smooth spacetimes possessing a (global) one-parameter group of isometries and an associated Killing horizon in Einstein's theory of gravity are investigated. No assumption concerning the asymptotic structure is made, thereby, the selected spacetimes may be considered as generic distorted stationary black holes. First, ... |
1602.08679 | Sijie Gao | Minyong Guo and Sijie Gao | Kerr black holes as accelerators of spinning test particles | 11 pages, no figure; matches version published in PRD | Phys. Rev. D 93, 084025 (2016) | 10.1103/PhysRevD.93.084025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that ultraenergetic collisions can occur near the horizon
of an extremal Kerr black hole. Previous studies mainly focused on geodesic
motions of particles. In this paper, we consider spinning test particles whose
orbits are non-geodesic. By employing the Mathisson-Papapetrou-Dixon equation,
we find ... | [
{
"created": "Sun, 28 Feb 2016 07:27:05 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Apr 2016 04:42:15 GMT",
"version": "v2"
}
] | 2016-05-04 | [
[
"Guo",
"Minyong",
""
],
[
"Gao",
"Sijie",
""
]
] | It has been shown that ultraenergetic collisions can occur near the horizon of an extremal Kerr black hole. Previous studies mainly focused on geodesic motions of particles. In this paper, we consider spinning test particles whose orbits are non-geodesic. By employing the Mathisson-Papapetrou-Dixon equation, we find th... |
gr-qc/9303025 | Stephen Parrott | Stephen Parrott | Radiation from a Uniformly Accelerated Charge and the Equivalence
Principle | LaTeX, 31 pages, 2 figures (also in LaTeX). Appendix 4, discussing
subsequent work of others, has been rewritten. To appear in Foundations of
Physics | Found.Phys. 32 (2002) 407-440 | null | null | gr-qc astro-ph hep-ph hep-th | null | We argue that purely local experiments can distinguish a stationary charged
particle in a static gravitational field from an accelerated particle in
(gravity-free) Minkowski space. Some common arguments to the contrary are
analyzed and found to rest on a misidentification of ``energy''.
| [
{
"created": "Sat, 20 Mar 1993 10:35:59 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Jul 1994 19:24:56 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jul 1994 21:37:56 GMT",
"version": "v3"
},
{
"created": "Wed, 24 Jan 1996 03:08:45 GMT",
"version": "v4"
},
{
"c... | 2008-02-03 | [
[
"Parrott",
"Stephen",
""
]
] | We argue that purely local experiments can distinguish a stationary charged particle in a static gravitational field from an accelerated particle in (gravity-free) Minkowski space. Some common arguments to the contrary are analyzed and found to rest on a misidentification of ``energy''. |
0807.4774 | Matthew Evans | M. Evans, S. Ballmer, M. Fejer, P. Fritschel, G. Harry, G. Ogin | Thermo-optic noise in coated mirrors for high-precision optical
measurements | null | Phys.Rev.D78:102003,2008 | 10.1103/PhysRevD.78.102003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thermal fluctuations in the coatings used to make high-reflectors are
becoming significant noise sources in precision optical measurements and are
particularly relevant to advanced gravitational wave detectors. There are two
recognized sources of coating thermal noise, mechanical loss and thermal
dissipation. Thermal... | [
{
"created": "Wed, 30 Jul 2008 03:28:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Evans",
"M.",
""
],
[
"Ballmer",
"S.",
""
],
[
"Fejer",
"M.",
""
],
[
"Fritschel",
"P.",
""
],
[
"Harry",
"G.",
""
],
[
"Ogin",
"G.",
""
]
] | Thermal fluctuations in the coatings used to make high-reflectors are becoming significant noise sources in precision optical measurements and are particularly relevant to advanced gravitational wave detectors. There are two recognized sources of coating thermal noise, mechanical loss and thermal dissipation. Thermal d... |
2009.13838 | Bekir Can L\"utf\"uo\u{g}lu | B. Hamil and B.C. L\"utf\"uo\u{g}lu | New higher-order generalized uncertainty principle: Applications | 12 pages, 7 pages | Int.J.Theor. Phys. 60, 2790 - 2803 (2021) | 10.1007/s10773-021-04853-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Last year, Chung and Hassanabadi proposed a higher order general uncertainty
principle (GUP$^\ast$) that predicts a minimal length as well as possesses a
upper bound momentum limit. In this article, we have discussed an ideal gas
system and its thermal properties using that deformed canonical algebra
introduced by th... | [
{
"created": "Tue, 29 Sep 2020 08:01:23 GMT",
"version": "v1"
}
] | 2021-08-17 | [
[
"Hamil",
"B.",
""
],
[
"Lütfüoğlu",
"B. C.",
""
]
] | Last year, Chung and Hassanabadi proposed a higher order general uncertainty principle (GUP$^\ast$) that predicts a minimal length as well as possesses a upper bound momentum limit. In this article, we have discussed an ideal gas system and its thermal properties using that deformed canonical algebra introduced by them... |
gr-qc/0409104 | Bijan Saha | Bijan Saha | Bianchi type I universe with viscous fluid | 12 pages, 3 figures, few minor changes have been made | Mod.Phys.Lett. A20 (2005) 2127-2144 | 10.1142/S021773230501830X | null | gr-qc | null | We study the evolution of a homogeneous, anisotropic Universe given by a
Bianchi type-I cosmological model filled with viscous fluid, in the presence of
a cosmological constant $\Lambda$. The role of viscous fluid and $\Lambda$ term
in the evolution the BI space-time is studied. Though the viscosity cannot
remove the... | [
{
"created": "Tue, 28 Sep 2004 08:34:33 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Oct 2004 12:59:08 GMT",
"version": "v2"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
]
] | We study the evolution of a homogeneous, anisotropic Universe given by a Bianchi type-I cosmological model filled with viscous fluid, in the presence of a cosmological constant $\Lambda$. The role of viscous fluid and $\Lambda$ term in the evolution the BI space-time is studied. Though the viscosity cannot remove the c... |
1901.01731 | Chris Ripken | Frank Saueressig, Giulia Gubitosi and Chris Ripken | Scales and hierachies in asymptotically safe quantum gravity: a review | 18 pages, 5 figures. Prepared for submission to Foundations of
Physics: S.I.: Naturalness, Hierarchy, and Fine-Tuning | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic safety program strives for a consistent description of gravity
as a non-perturbatively renormalizable quantum field theory. In this framework
the gravitational interactions are encoded in a renormalization group flow
connecting the quantum gravity regime at trans-Planckian scales to observable
low-ener... | [
{
"created": "Mon, 7 Jan 2019 09:58:37 GMT",
"version": "v1"
}
] | 2019-01-08 | [
[
"Saueressig",
"Frank",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Ripken",
"Chris",
""
]
] | The asymptotic safety program strives for a consistent description of gravity as a non-perturbatively renormalizable quantum field theory. In this framework the gravitational interactions are encoded in a renormalization group flow connecting the quantum gravity regime at trans-Planckian scales to observable low-energy... |
1203.0898 | \"Ozcan Sert | \"Ozcan Sert | Gravity and Electromagnetism with $Y(R)F^2$-type Coupling and Magnetic
Monopole Solutions | 10 pages | Eur. Phys. J. Plus (2012) 127: 152 | 10.1140/epjp/i2012-12152-5 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate $ Y(R) F^2 $-type coupling of electromagnetic fields to
gravity. After we derive field equations by a first order variational principle
from the Lagrangian formulation of the non-minimally coupled theory, we look
for static, spherically symmetric, magnetic monopole solutions. We point out
that the solu... | [
{
"created": "Mon, 5 Mar 2012 13:03:05 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2012 14:40:51 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Sert",
"Özcan",
""
]
] | We investigate $ Y(R) F^2 $-type coupling of electromagnetic fields to gravity. After we derive field equations by a first order variational principle from the Lagrangian formulation of the non-minimally coupled theory, we look for static, spherically symmetric, magnetic monopole solutions. We point out that the soluti... |
1312.7478 | Karl\'ucio Castello-Branco | K. H. C. Castello-Branco and J. F. da Rocha-Neto | Gravitational energy, gravitational pressure, and the thermodynamics of
a charged black hole in teleparallel gravity | 20 pages, version to match the one which appeared in Physical Review
D | Physical Review D 88, 024045 (2013) | 10.1103/PhysRevD.88.024045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate, in the case of a Reissner-Nordstr\"om black hole, the
definitions of gravitational energy and gravitational pressure that naturally
arise in the framework of the Teleparallel Equivalent of General Relativity. In
particular, we calculate the gravitational energy enclosed by the event horizon
of the bla... | [
{
"created": "Sat, 28 Dec 2013 22:54:44 GMT",
"version": "v1"
}
] | 2013-12-31 | [
[
"Castello-Branco",
"K. H. C.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | We investigate, in the case of a Reissner-Nordstr\"om black hole, the definitions of gravitational energy and gravitational pressure that naturally arise in the framework of the Teleparallel Equivalent of General Relativity. In particular, we calculate the gravitational energy enclosed by the event horizon of the black... |
1307.4021 | Marco Astorino | Marco Astorino | C-metric with a conformally coupled scalar field in a magnetic universe | 24 pages, V2: reference added, style improved according to the
published version | Phys. Rev. D 88, 104027 (2013) | 10.1103/PhysRevD.88.104027 | CECS-PHY-13/05 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Einstein-Maxwell gravity with a conformally coupled scalar field, the
black hole found by Bocharova, Bronnikov, Melnikov, and Bekenstein breaks when
embedded in the external magnetic field of the Melvin universe. The situation
improves in presence of acceleration, allowing one to build magnetised and
accelerating ... | [
{
"created": "Mon, 15 Jul 2013 17:09:03 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Nov 2013 22:18:53 GMT",
"version": "v2"
}
] | 2013-12-02 | [
[
"Astorino",
"Marco",
""
]
] | In Einstein-Maxwell gravity with a conformally coupled scalar field, the black hole found by Bocharova, Bronnikov, Melnikov, and Bekenstein breaks when embedded in the external magnetic field of the Melvin universe. The situation improves in presence of acceleration, allowing one to build magnetised and accelerating BB... |
1301.3429 | Oleg Zaslavskii | O. B. Zaslavskii | Comment on "Black Holes are Neither Particle Accelerators Nor Dark
Matter Probes" | 2 pages. Substantial revision | Phys. Rev. Lett. 111, 079001 (2013) | 10.1103/PhysRevLett.111.079001 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Banados-Silk-West effect consists in the possibility to get infinite
energy in the centre of mass frame of two particles colliding near the black
hole horizon. According to S. T. McWilliams, Phys. Rev. Lett. 110 (2013)
011102, the energy at infinity of the outcome vanishes because of infinite
redshift when the po... | [
{
"created": "Tue, 15 Jan 2013 17:58:30 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Feb 2013 17:40:53 GMT",
"version": "v2"
}
] | 2013-08-20 | [
[
"Zaslavskii",
"O. B.",
""
]
] | The Banados-Silk-West effect consists in the possibility to get infinite energy in the centre of mass frame of two particles colliding near the black hole horizon. According to S. T. McWilliams, Phys. Rev. Lett. 110 (2013) 011102, the energy at infinity of the outcome vanishes because of infinite redshift when the poin... |
2010.08528 | Elcio Abdalla | Elcio Abdalla and Alessandro Marins | The Dark Sector Cosmology | 14 pages, invited paper to appear in Int. J. Mod. Phys. D | null | 10.1142/S0218271820300141 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The most important problem in fundamental physics is the description of the
contents of the Universe. Today, we know that 95% thereof is totally unknown.
Two thirds of that amount is the mysterious Dark Energy described in an
interesting and important review. We briefly extend here the ideas contained in
that review ... | [
{
"created": "Fri, 16 Oct 2020 17:40:36 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Abdalla",
"Elcio",
""
],
[
"Marins",
"Alessandro",
""
]
] | The most important problem in fundamental physics is the description of the contents of the Universe. Today, we know that 95% thereof is totally unknown. Two thirds of that amount is the mysterious Dark Energy described in an interesting and important review. We briefly extend here the ideas contained in that review in... |
gr-qc/9705021 | Thomas Thiemann | Thomas Thiemann | Kinematical Hilbert Spaces for Fermionic and Higgs Quantum Field
Theories | 26p, LATEX | Class.Quant.Grav. 15 (1998) 1487-1512 | 10.1088/0264-9381/15/6/006 | HUTMP-97/B-364 | gr-qc hep-th | null | We extend the recently developed kinematical framework for diffeomorphism
invariant theories of connections for compact gauge groups to the case of a
diffeomorphism invariant quantum field theory which includes besides
connections also fermions and Higgs fields. This framework is appropriate for
coupling matter to qu... | [
{
"created": "Sat, 10 May 1997 00:16:09 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Thiemann",
"Thomas",
""
]
] | We extend the recently developed kinematical framework for diffeomorphism invariant theories of connections for compact gauge groups to the case of a diffeomorphism invariant quantum field theory which includes besides connections also fermions and Higgs fields. This framework is appropriate for coupling matter to quan... |
2310.00805 | Mouhssine Koussour | N. Myrzakulov, M. Koussour, Alnadhief H. A. Alfedeel, and H. M.
Elkhair | Cosmological implications of the constant jerk parameter in $f(Q,T)$
gravity theory | Chinese Journal of Physics accepted version | Chin. J. Phys. 86, 300-312 (2023) | 10.1016/j.cjph.2023.10.001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study delves into modified gravity theories that are equivalent to
General Relativity but involve the torsion or non-metricity scalar instead of
the curvature scalar. Specifically, we focus on $f(Q,T)$ gravity, which entails
an arbitrary function of the non-metricity scalar $Q$ non-minimally coupled to
the trace... | [
{
"created": "Sun, 1 Oct 2023 22:14:37 GMT",
"version": "v1"
}
] | 2023-11-22 | [
[
"Myrzakulov",
"N.",
""
],
[
"Koussour",
"M.",
""
],
[
"Alfedeel",
"Alnadhief H. A.",
""
],
[
"Elkhair",
"H. M.",
""
]
] | This study delves into modified gravity theories that are equivalent to General Relativity but involve the torsion or non-metricity scalar instead of the curvature scalar. Specifically, we focus on $f(Q,T)$ gravity, which entails an arbitrary function of the non-metricity scalar $Q$ non-minimally coupled to the trace o... |
1207.3138 | Xue-Mei Deng | Xue-Mei Deng and Yi Xie | 2PN Light Propagation in the Scalar-Tensor Theory: an $N$-Point-Masses
Case | 34 pages, no figure; Accepted by Physical Review D | Physical Review D, vol. 86, Issue 4, id. 044007,2012 | 10.1103/PhysRevD.86.044007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of the scalar-tensor theory (STT), its second
post-Newtonian (2PN) approximation is obtained with Chandrasekhar's approach.
By focusing on an $N$-point-masses system as the first step, we reduce the
metric to its 2PN form for light propagation. Unlike previous works, at 2PN
order, we abandon the ... | [
{
"created": "Fri, 13 Jul 2012 03:14:00 GMT",
"version": "v1"
}
] | 2013-07-05 | [
[
"Deng",
"Xue-Mei",
""
],
[
"Xie",
"Yi",
""
]
] | Within the framework of the scalar-tensor theory (STT), its second post-Newtonian (2PN) approximation is obtained with Chandrasekhar's approach. By focusing on an $N$-point-masses system as the first step, we reduce the metric to its 2PN form for light propagation. Unlike previous works, at 2PN order, we abandon the hi... |
2007.07717 | Shibesh Kumar Jas Pacif | Simran Arora, Xin-he Meng, S.K.J. Pacif, P.K. Sahoo | Effective equation of state in modified gravity and observational
constraints | CQG accepted version | Classical and Quantum Gravity, 37(20) (2020) 205022 | 10.1088/1361-6382/aba587 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, the bulk viscosity is introduced in a modified gravity
model. The gravitational action has a general $f(R,T)$ form, where $R$ and $ T
$ are the curvature scalar and the trace of energy momentum tensor
respectively. An effective equation of state (EoS) has been investigated in the
cosmological evoluti... | [
{
"created": "Wed, 15 Jul 2020 14:45:08 GMT",
"version": "v1"
}
] | 2020-10-02 | [
[
"Arora",
"Simran",
""
],
[
"Meng",
"Xin-he",
""
],
[
"Pacif",
"S. K. J.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this article, the bulk viscosity is introduced in a modified gravity model. The gravitational action has a general $f(R,T)$ form, where $R$ and $ T $ are the curvature scalar and the trace of energy momentum tensor respectively. An effective equation of state (EoS) has been investigated in the cosmological evolution... |
gr-qc/0011061 | Malakhaltsev Mikhail A. | V.I. Bashkov, M.A. Malakhaltsev | Geometry of rotating disk and the Sagnac effect | null | null | null | null | gr-qc | null | In this paper we demonstrate that subsequent application of Lorentz
transformations to the cylindrical coordinates on a rotating disk leaves the
Euclidean metric invariant. Therefore, the geometry on rotating disk is the
Euclidean geometry, and any experiment which do not involve tidal forces or
Coriolis forces canno... | [
{
"created": "Sat, 18 Nov 2000 15:56:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bashkov",
"V. I.",
""
],
[
"Malakhaltsev",
"M. A.",
""
]
] | In this paper we demonstrate that subsequent application of Lorentz transformations to the cylindrical coordinates on a rotating disk leaves the Euclidean metric invariant. Therefore, the geometry on rotating disk is the Euclidean geometry, and any experiment which do not involve tidal forces or Coriolis forces cannot ... |
2004.02939 | Tim Schmitz | W{\l}odzimierz Piechocki and Tim Schmitz | Quantum Oppenheimer-Snyder model | 20 pages, 11 figures; v2: matches the published version | Phys. Rev. D 102, 046004 (2020) | 10.1103/PhysRevD.102.046004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct two reduced quantum theories for the Oppenheimer-Snyder model,
respectively taking the point of view of the comoving and the exterior
stationary observer, using affine coherent states quantization. Investigations
of the quantum corrected dynamics reveal that both observers can see a bounce,
although for ... | [
{
"created": "Mon, 6 Apr 2020 18:56:18 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Aug 2020 15:06:29 GMT",
"version": "v2"
}
] | 2020-08-10 | [
[
"Piechocki",
"Włodzimierz",
""
],
[
"Schmitz",
"Tim",
""
]
] | We construct two reduced quantum theories for the Oppenheimer-Snyder model, respectively taking the point of view of the comoving and the exterior stationary observer, using affine coherent states quantization. Investigations of the quantum corrected dynamics reveal that both observers can see a bounce, although for th... |
gr-qc/0610097 | Robert Woodside | A. Das, N. Tariq, R.M.W. Woodside | General Solutions of Cosmological Equations with Inequalities for
Perfect Fluid and Scalar Field | 20 pages and 3 figures | null | null | null | gr-qc | null | Spherically symmetric cosmological equations in the usual FLRW coordinates
are explored, with different sources. The first couples a perfect fluid with a
quintessence scalar field and the second couples a perfect fluid to a tachyonic
scalar field. In both cases, in the inflationary regime, the scale factor a(t)
and i... | [
{
"created": "Thu, 19 Oct 2006 23:31:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Das",
"A.",
""
],
[
"Tariq",
"N.",
""
],
[
"Woodside",
"R. M. W.",
""
]
] | Spherically symmetric cosmological equations in the usual FLRW coordinates are explored, with different sources. The first couples a perfect fluid with a quintessence scalar field and the second couples a perfect fluid to a tachyonic scalar field. In both cases, in the inflationary regime, the scale factor a(t) and its... |
2110.03182 | Ksh Newton Singh | Ksh. Newton Singh, S. K. Maurya, Abhisek Dutta, Farook Rahaman, Somi
Aktar | Quark stars in 4-dimensional Einstein-Gauss-Bonnet gravity | 10 pages, 12 Figures, 1 Table (Accepted in Eur. Phys. J. C) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The article explores the first exact solution in a four-dimensional
EGB-gravity with an anisotropic matter source. The solution has been found by
two assumptions, a metric potential and the MIT-bag equation of state. Further,
the solution has been tested with several physical constraints. Finally, using
the boundary ... | [
{
"created": "Thu, 7 Oct 2021 04:57:54 GMT",
"version": "v1"
}
] | 2021-10-08 | [
[
"Singh",
"Ksh. Newton",
""
],
[
"Maurya",
"S. K.",
""
],
[
"Dutta",
"Abhisek",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Aktar",
"Somi",
""
]
] | The article explores the first exact solution in a four-dimensional EGB-gravity with an anisotropic matter source. The solution has been found by two assumptions, a metric potential and the MIT-bag equation of state. Further, the solution has been tested with several physical constraints. Finally, using the boundary co... |
2401.03655 | Pravin Dahal | Pravin Kumar Dahal, Swayamsiddha Maharana | The Hawking temperature of dynamical black holes via conformal
transformations | 19 pages, 2 figures, Published Version; Comments Welcome! | Eur. Phys. J. C 84, 783 (2024) | 10.1140/epjc/s10052-024-13166-x | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this second part of our two-series on extracting the Hawking temperature
of dynamical black holes, we focus into spacetimes that are conformal
transformations of static spacetimes. Our previous investigation builds upon
the Unruh-Hawking analogy, which relates the spacetime of a uniformly
accelerating observer to ... | [
{
"created": "Mon, 8 Jan 2024 03:57:21 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2024 09:21:27 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Aug 2024 23:59:09 GMT",
"version": "v3"
}
] | 2024-08-08 | [
[
"Dahal",
"Pravin Kumar",
""
],
[
"Maharana",
"Swayamsiddha",
""
]
] | In this second part of our two-series on extracting the Hawking temperature of dynamical black holes, we focus into spacetimes that are conformal transformations of static spacetimes. Our previous investigation builds upon the Unruh-Hawking analogy, which relates the spacetime of a uniformly accelerating observer to th... |
1608.05961 | Oldrich Semerak | M. Basovn\'ik and O. Semer\'ak | On geometry of deformed black holes: II. Schwarzschild hole surrounded
by a Bach-Weyl ring | 23 pages, 12 figures | Physical Review D 94, 044007 (2016) | 10.1103/PhysRevD.94.044007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue to study the response of black-hole space-times on the presence
of additional strong sources of gravity. Restricting ourselves to static and
axially symmetric (electro-)vacuum exact solutions of Einstein's equations, we
first considered the Majumdar--Papapetrou solution for a binary of extreme
black holes... | [
{
"created": "Sun, 21 Aug 2016 16:07:10 GMT",
"version": "v1"
}
] | 2016-08-23 | [
[
"Basovník",
"M.",
""
],
[
"Semerák",
"O.",
""
]
] | We continue to study the response of black-hole space-times on the presence of additional strong sources of gravity. Restricting ourselves to static and axially symmetric (electro-)vacuum exact solutions of Einstein's equations, we first considered the Majumdar--Papapetrou solution for a binary of extreme black holes i... |
gr-qc/0101002 | Heui-Seol Roh | Heui-Seol Roh | Toward Quantum Gravity II: Quantum Tests | REVTeX, 22 pages | null | null | null | gr-qc hep-ph | null | This study toward quantum gravity (QG) introduces an SU(N) gauge theory with
the \Theta vacuum term for gravitational interactions, which leads to a group
SU(2)_L x U(1)_Y x SU(3)_C for weak and strong interactions through dynamical
spontaneous symmetry breaking (DSSB). Newton gravitation constant G_N and the
effecti... | [
{
"created": "Sat, 30 Dec 2000 05:06:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Roh",
"Heui-Seol",
""
]
] | This study toward quantum gravity (QG) introduces an SU(N) gauge theory with the \Theta vacuum term for gravitational interactions, which leads to a group SU(2)_L x U(1)_Y x SU(3)_C for weak and strong interactions through dynamical spontaneous symmetry breaking (DSSB). Newton gravitation constant G_N and the effective... |
2103.02097 | Celia Escamilla-Rivera | Celia Escamilla-Rivera and Antonio N\'ajera | Dynamical dark energy models in the light of Gravitational-Wave
Transient Catalogues | 24 pages, 6 figures and 6 tables. Version accepted in JCAP | JCAP03(2022)060 | 10.1088/1475-7516/2022/03/060 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The study of current gravitational waves (GW) catalogues provide an
interesting model independent way to understand further the nature of dark
energy. In this work, we present an update of the constrains related to
dynamical dark energy parametrisations using recent Gravitational-Wave
Transient catalogues (GWTC-1 and... | [
{
"created": "Wed, 3 Mar 2021 00:15:54 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Mar 2022 02:08:17 GMT",
"version": "v2"
}
] | 2022-03-30 | [
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Nájera",
"Antonio",
""
]
] | The study of current gravitational waves (GW) catalogues provide an interesting model independent way to understand further the nature of dark energy. In this work, we present an update of the constrains related to dynamical dark energy parametrisations using recent Gravitational-Wave Transient catalogues (GWTC-1 and G... |
1701.00735 | Eduardo J S Villase\~nor | J. Fernando G. Barbero, Benito A. Ju\'arez-Aubry, Juan
Margalef-Bentabol, and Eduardo J. S. Villase\~nor | Boundary Hilbert spaces and trace operators | 13 pages. Accepted for publication in Classical and Quantum Gravity | Classical and Quantum Gravity, 34 (2017) 095005 | 10.1088/1361-6382/aa65ff | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the introduction of boundary Hilbert spaces for a class of
physical systems for which it is not possible to factor their state spaces as
tensor products of Hilbert spaces naturally associated to their boundaries and
bulks respectively. In order to do this we make use of the so called trace
operators that p... | [
{
"created": "Tue, 3 Jan 2017 16:17:53 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Mar 2017 15:31:53 GMT",
"version": "v2"
}
] | 2017-04-03 | [
[
"Barbero",
"J. Fernando G.",
""
],
[
"Juárez-Aubry",
"Benito A.",
""
],
[
"Margalef-Bentabol",
"Juan",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We discuss the introduction of boundary Hilbert spaces for a class of physical systems for which it is not possible to factor their state spaces as tensor products of Hilbert spaces naturally associated to their boundaries and bulks respectively. In order to do this we make use of the so called trace operators that pla... |
1011.0421 | Eliu Huerta | E.A. Huerta and Jonathan R. Gair | Intermediate-mass-ratio-inspirals in the Einstein Telescope. II.
Parameter estimation errors | 21 pages, 5 figures. One reference corrected in v3 for consistency
with published version in Phys Rev D | Phys.Rev.D83:044021,2011 | 10.1103/PhysRevD.83.044021 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the precision with which the Einstein Telescope (ET) will be able
to measure the parameters of intermediate-mass-ratio inspirals (IMRIs). We
calculate the parameter estimation errors using the Fisher Matrix formalism and
present results of a Monte Carlo simulation of these errors over choices for
the extri... | [
{
"created": "Mon, 1 Nov 2010 19:39:09 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jan 2011 13:21:32 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Feb 2011 10:36:51 GMT",
"version": "v3"
}
] | 2015-03-17 | [
[
"Huerta",
"E. A.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | We explore the precision with which the Einstein Telescope (ET) will be able to measure the parameters of intermediate-mass-ratio inspirals (IMRIs). We calculate the parameter estimation errors using the Fisher Matrix formalism and present results of a Monte Carlo simulation of these errors over choices for the extrins... |
2111.04135 | Muhammed Saleem C | Muhammed Saleem, N. V. Krishnendu, Abhirup Ghosh, Anuradha Gupta, W.
Del Pozzo, Archisman Ghosh, and K. G. Arun | Population inference of spin-induced quadrupole moments as a probe for
non-black hole compact binaries | 13 pages, 6 figures, 1 table | null | 10.1103/PhysRevD.105.104066 | null | gr-qc astro-ph.HE | http://creativecommons.org/publicdomain/zero/1.0/ | Gravitational-wave (GW) measurements of physical effects such as spin-induced
quadrupole moments can distinguish binaries consisting of black holes from
non-black hole binaries. While these effects may be poorly constrained for
single-event inferences with the second-generation detectors, combining
information from m... | [
{
"created": "Sun, 7 Nov 2021 17:51:04 GMT",
"version": "v1"
}
] | 2022-06-08 | [
[
"Saleem",
"Muhammed",
""
],
[
"Krishnendu",
"N. V.",
""
],
[
"Ghosh",
"Abhirup",
""
],
[
"Gupta",
"Anuradha",
""
],
[
"Del Pozzo",
"W.",
""
],
[
"Ghosh",
"Archisman",
""
],
[
"Arun",
"K. G.",
""
]
] | Gravitational-wave (GW) measurements of physical effects such as spin-induced quadrupole moments can distinguish binaries consisting of black holes from non-black hole binaries. While these effects may be poorly constrained for single-event inferences with the second-generation detectors, combining information from mul... |
gr-qc/0607009 | Giovanni Imponente | Giovanni Imponente and Giovanni Montani | Classical and quantum behavior of the generic cosmological solution | 8 pages, AIP Proceedings, Eistein Century Conference, Paris 2005 | null | 10.1063/1.2399600 | null | gr-qc hep-th | null | In the present paper we generalize the original work of C.W. Misner
\cite{M69q} about the quantum dynamics of the Bianchi type IX geometry near the
cosmological singularity. We extend the analysis to the generic inhomogeneous
universe by solving the super-momentum constraint and outlining the dynamical
decoupling of ... | [
{
"created": "Tue, 4 Jul 2006 08:28:06 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Imponente",
"Giovanni",
""
],
[
"Montani",
"Giovanni",
""
]
] | In the present paper we generalize the original work of C.W. Misner \cite{M69q} about the quantum dynamics of the Bianchi type IX geometry near the cosmological singularity. We extend the analysis to the generic inhomogeneous universe by solving the super-momentum constraint and outlining the dynamical decoupling of sp... |
1907.09372 | Haryanto Siahaan | Haryanto M. Siahaan | Pair production of scalars around near-extremal Kerr-Sen black holes | 16 pages, 1 figure | null | 10.1140/epjc/s10052-020-7920-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the charged scalar pair production near the horizon of a
near-extremal Kerr-Sen black holes. The condition for pair production to occur
has relation to the violation of Breitenlohner-Freedman bound in an AdS$_2$
space. The method employed in this work has been used to show the pair
production in the ne... | [
{
"created": "Mon, 22 Jul 2019 15:38:54 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 08:43:51 GMT",
"version": "v2"
}
] | 2020-06-24 | [
[
"Siahaan",
"Haryanto M.",
""
]
] | We investigate the charged scalar pair production near the horizon of a near-extremal Kerr-Sen black holes. The condition for pair production to occur has relation to the violation of Breitenlohner-Freedman bound in an AdS$_2$ space. The method employed in this work has been used to show the pair production in the near... |
1602.01772 | Antonino Marciano | Andrea Addazi, Pietro Don\`a and Antonino Marcian\`o | Dark Energy and Dark Matter from Yang-Mills Condensate and the
Peccei-Quinn mechanism | 8 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a model of cold axion Dark Matter weakly coupled with a dark gluon
condensate, reproducing Dark Energy. We first review how to recover the Dark
Energy behavior using the functional renormalization group approach, and ground
our study on the properties of the effective Lagrangian, to be determined
non-pertu... | [
{
"created": "Thu, 4 Feb 2016 18:11:06 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Nov 2016 09:00:01 GMT",
"version": "v2"
}
] | 2016-11-08 | [
[
"Addazi",
"Andrea",
""
],
[
"Donà",
"Pietro",
""
],
[
"Marcianò",
"Antonino",
""
]
] | We analyze a model of cold axion Dark Matter weakly coupled with a dark gluon condensate, reproducing Dark Energy. We first review how to recover the Dark Energy behavior using the functional renormalization group approach, and ground our study on the properties of the effective Lagrangian, to be determined non-perturb... |
2108.04065 | Michele Maggiore | Andreas Finke, Stefano Foffa, Francesco Iacovelli, Michele Maggiore
and Michele Mancarella | Modified gravitational wave propagation and the binary neutron star mass
function | v2: expanded version, to appear in Physics of the Dark Universe | null | 10.1016/j.dark.2022.100994 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravitational wave (GW) propagation is a generic phenomenon in
modified gravity. It affects the reconstruction of the redshift of coalescing
binaries from the luminosity distance measured by GW detectors, and therefore
the reconstruction of the actual masses of the component compact stars from the
observed (... | [
{
"created": "Mon, 9 Aug 2021 14:17:09 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Feb 2022 16:34:25 GMT",
"version": "v2"
}
] | 2022-09-29 | [
[
"Finke",
"Andreas",
""
],
[
"Foffa",
"Stefano",
""
],
[
"Iacovelli",
"Francesco",
""
],
[
"Maggiore",
"Michele",
""
],
[
"Mancarella",
"Michele",
""
]
] | Modified gravitational wave (GW) propagation is a generic phenomenon in modified gravity. It affects the reconstruction of the redshift of coalescing binaries from the luminosity distance measured by GW detectors, and therefore the reconstruction of the actual masses of the component compact stars from the observed (`d... |
2309.04110 | Yen Chin Ong | Yen Chin Ong | A Maximum Force Perspective on Black Hole Thermodynamics, Quantum
Pressure, and Near-Extremality | Version to match the published article; expanded discussion | Eur.Phys.J.C 83 (2023) 11, 1068 | 10.1140/epjc/s10052-023-12253-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I re-examined the notion of the thermodynamic force constructed from the
first law of black hole thermodynamics. In general relativity, the value of the
charge (or angular momentum) at which the thermodynamic force equals the
conjectured maximum force $F=1/4$ is found to correspond to $Q^2/M^2=8/9$
(respectively, $a^... | [
{
"created": "Fri, 8 Sep 2023 04:12:19 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Sep 2023 14:20:55 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Dec 2023 06:55:01 GMT",
"version": "v3"
}
] | 2023-12-11 | [
[
"Ong",
"Yen Chin",
""
]
] | I re-examined the notion of the thermodynamic force constructed from the first law of black hole thermodynamics. In general relativity, the value of the charge (or angular momentum) at which the thermodynamic force equals the conjectured maximum force $F=1/4$ is found to correspond to $Q^2/M^2=8/9$ (respectively, $a^2/... |
1302.0509 | Piotr Jaranowski | Andrzej Pisarski and Piotr Jaranowski | Banks of templates for all-sky narrow-band searches of gravitational
waves from spinning neutron stars | 21 pages, 5 figures. Identical with the published version. arXiv
admin note: text overlap with arXiv:1010.2879 | Class. Quantum Grav. 32, 145014 (2015) | 10.1088/0264-9381/32/14/145014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct efficient banks of templates suitable for all-sky narrow-band
searches of almost monochromatic gravitational waves originating from spinning
neutron stars in our Galaxy in data collected by interferometric detectors. We
consider waves with one spindown parameter included and we assume that both the
posit... | [
{
"created": "Sun, 3 Feb 2013 16:59:20 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Dec 2014 16:22:27 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Aug 2015 13:55:32 GMT",
"version": "v3"
}
] | 2015-08-10 | [
[
"Pisarski",
"Andrzej",
""
],
[
"Jaranowski",
"Piotr",
""
]
] | We construct efficient banks of templates suitable for all-sky narrow-band searches of almost monochromatic gravitational waves originating from spinning neutron stars in our Galaxy in data collected by interferometric detectors. We consider waves with one spindown parameter included and we assume that both the positio... |
gr-qc/0609107 | Sung-Sik Lee | Sung-Sik Lee | Emergence of gravity from interacting simplices | 18 pages, 6 figures, one-column format; major revisions in version 5
: reviews on emergent gauge theories added; microscopic simplex model for
emergent gravity added; erroneous statements on diffeomorphism invariance
removed | Int.J.Mod.Phys.A24:4271-4286,2009 | 10.1142/S0217751X09045856 | null | gr-qc cond-mat.str-el hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a statistical model of interacting 4-simplices fluctuating in an
N-dimensional target space. We argue that a gravitational theory may arise as a
low energy effective theory in a strongly interacting phase where the simplices
form clusters with an emergent space and time with the Euclidean signature. In
th... | [
{
"created": "Mon, 25 Sep 2006 19:32:06 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2006 19:37:06 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Dec 2006 23:23:07 GMT",
"version": "v3"
},
{
"created": "Sat, 7 Jul 2007 04:20:28 GMT",
"version": "v4"
},
{
"cr... | 2009-09-25 | [
[
"Lee",
"Sung-Sik",
""
]
] | We consider a statistical model of interacting 4-simplices fluctuating in an N-dimensional target space. We argue that a gravitational theory may arise as a low energy effective theory in a strongly interacting phase where the simplices form clusters with an emergent space and time with the Euclidean signature. In the ... |
2110.11083 | Uwe R. Fischer | Satadal Datta, Uwe R. Fischer | Analogue gravitational field from nonlinear fluid dynamics | 13 pages, 2 figures | Class. Quantum Grav. 39, 075018 (2022) | 10.1088/1361-6382/ac4828 | null | gr-qc cond-mat.quant-gas | http://creativecommons.org/licenses/by/4.0/ | The dynamics of sound in a fluid is intrinsically nonlinear. We derive the
consequences of this fact for the analogue gravitational field experienced by
sound waves, by first describing generally how the nonlinearity of the equation
for phase fluctuations back-reacts onto the definition of the background
providing th... | [
{
"created": "Thu, 21 Oct 2021 11:50:30 GMT",
"version": "v1"
}
] | 2022-12-01 | [
[
"Datta",
"Satadal",
""
],
[
"Fischer",
"Uwe R.",
""
]
] | The dynamics of sound in a fluid is intrinsically nonlinear. We derive the consequences of this fact for the analogue gravitational field experienced by sound waves, by first describing generally how the nonlinearity of the equation for phase fluctuations back-reacts onto the definition of the background providing the ... |
0804.3264 | Elias C. Vagenas | Elias C. Vagenas | Area spectrum of rotating black holes via the new interpretation of
quasinormal modes | v1: 4 pages, REVTeX, no figures; v2: clarifications and comments
added, comments on last result modified, Abstract slightly changed; v3:
comments and references added; | JHEP0811:073,2008 | 10.1088/1126-6708/2008/11/073 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the recent work on a new physical interpretation of quasinormal
modes by Maggiore, we utilize this new proposal to the interesting case of Kerr
black hole. In particular, by modifying Hod's idea, the resulting black hole
horizon area is quantized and the resulting area quantum is in full agreement
with B... | [
{
"created": "Mon, 21 Apr 2008 10:44:02 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Apr 2008 19:17:01 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Oct 2008 19:50:23 GMT",
"version": "v3"
}
] | 2008-12-18 | [
[
"Vagenas",
"Elias C.",
""
]
] | Motivated by the recent work on a new physical interpretation of quasinormal modes by Maggiore, we utilize this new proposal to the interesting case of Kerr black hole. In particular, by modifying Hod's idea, the resulting black hole horizon area is quantized and the resulting area quantum is in full agreement with Bek... |
2004.13016 | Ming Zhang | Ming Zhang, Jie Jiang | Stable circular orbits of spinning test particles around accelerating
Kerr black hole | 10 pages, 6 captioned figures, PRD accepted, comments are welcome | Phys. Rev. D 101, 104012 (2020) | 10.1103/PhysRevD.101.104012 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We investigate the stable circular orbits of the spinning test particles
around the accelerating Kerr black hole on the equatorial plane. To this end,
we first calculate the equations of motion and analyze the parameter space for
the particles. We study the effect of the particle's spin and the black hole's
accelerat... | [
{
"created": "Sun, 26 Apr 2020 09:43:14 GMT",
"version": "v1"
}
] | 2020-05-13 | [
[
"Zhang",
"Ming",
""
],
[
"Jiang",
"Jie",
""
]
] | We investigate the stable circular orbits of the spinning test particles around the accelerating Kerr black hole on the equatorial plane. To this end, we first calculate the equations of motion and analyze the parameter space for the particles. We study the effect of the particle's spin and the black hole's acceleratio... |
2302.12037 | Cezary Turski | Cezary Turski, Maciej Bilicki, Gergely D\'alya, Rachel Gray and
Archisman Ghosh | Impact of modelling galaxy redshift uncertainties on the
gravitational-wave dark standard siren measurement of the Hubble constant | 9 pages, 8 figures, accepted to publication in MNRAS | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Gravitational wave science is a new and rapidly expanding field of
observational astronomy. Multimessenger observations of the binary neutron star
merger GW170817 have provided some iconic results including the first
gravitational-wave standard-siren measurement of the Hubble constant, opening
up a new way to probe c... | [
{
"created": "Thu, 23 Feb 2023 14:00:40 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2023 12:12:34 GMT",
"version": "v2"
}
] | 2023-10-11 | [
[
"Turski",
"Cezary",
""
],
[
"Bilicki",
"Maciej",
""
],
[
"Dálya",
"Gergely",
""
],
[
"Gray",
"Rachel",
""
],
[
"Ghosh",
"Archisman",
""
]
] | Gravitational wave science is a new and rapidly expanding field of observational astronomy. Multimessenger observations of the binary neutron star merger GW170817 have provided some iconic results including the first gravitational-wave standard-siren measurement of the Hubble constant, opening up a new way to probe cos... |
gr-qc/0412060 | Jin Yoshida | Yoshida Jin, Kei-ichi Maeda | Chaos of Yang-Mills Field in Class A Bianchi Spacetimes | 15 pages, 8 figures | Phys.Rev. D71 (2005) 064007 | 10.1103/PhysRevD.71.064007 | WU-AP/210/05 | gr-qc hep-th nlin.CD | null | Studying Yang-Mills field and gravitational field in class A Bianchi
spacetimes, we find that chaotic behavior appears in the late phase (the
asymptotic future). In this phase, the Yang-Mills field behaves as that in
Minkowski spacetime, in which we can understand it by a potential picture,
except for the types VIII ... | [
{
"created": "Mon, 13 Dec 2004 12:45:21 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2005 10:31:37 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Mar 2005 04:58:09 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Jin",
"Yoshida",
""
],
[
"Maeda",
"Kei-ichi",
""
]
] | Studying Yang-Mills field and gravitational field in class A Bianchi spacetimes, we find that chaotic behavior appears in the late phase (the asymptotic future). In this phase, the Yang-Mills field behaves as that in Minkowski spacetime, in which we can understand it by a potential picture, except for the types VIII an... |
1009.5190 | Loic Rolland | The Virgo Collaboration: T. Accadia, F. Acernese, F. Antonucci, P.
Astone, G. Ballardin, F. Barone, M. Barsuglia, A. Basti, Th. S. Bauer, M.G.
Beker, A. Belletoile, S. Birindelli, M. Bitossi, M. A. Bizouard, M. Blom, F.
Bondu, L. Bonelli, R. Bonnand, V. Boschi, L. Bosi, B. Bouhou, S. Braccini, C.
Bradaschia, A.... | Calibration and sensitivity of the Virgo detector during its second
science run | 30 pages, 23 figures, 1 table. Published in Classical and Quantum
Gravity (CQG), Corrigendum included | Class.Quant.Grav.28:025005,2011; Erratum-ibid.28:079501,2011 | 10.1088/0264-9381/28/2/025005 10.1088/0264-9381/28/7/079501 | null | gr-qc astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Virgo detector is a kilometer-length interferometer for gravitational
wave detection located near Pisa (Italy). During its second science run (VSR2)
in 2009, six months of data were accumulated with a sensitivity close to its
design. In this paper, the methods used to determine the parameters for
sensitivity esti... | [
{
"created": "Mon, 27 Sep 2010 08:56:13 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Nov 2010 09:13:22 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jan 2011 14:24:02 GMT",
"version": "v3"
}
] | 2011-03-10 | [
[
"The Virgo Collaboration",
"",
""
],
[
"Accadia",
"T.",
""
],
[
"Acernese",
"F.",
""
],
[
"Antonucci",
"F.",
""
],
[
"Astone",
"P.",
""
],
[
"Ballardin",
"G.",
""
],
[
"Barone",
"F.",
""
],
[
"Barsu... | The Virgo detector is a kilometer-length interferometer for gravitational wave detection located near Pisa (Italy). During its second science run (VSR2) in 2009, six months of data were accumulated with a sensitivity close to its design. In this paper, the methods used to determine the parameters for sensitivity estima... |
1408.4705 | Dra\v{z}en Glavan | D. Glavan, T. Prokopec, D. van der Woude | Late-time backreaction from inflationary fluctuations of a non-minimally
coupled massless scalar | 45 pages, 5 figures, uses RevTeX4.1 | Phys. Rev. D 91, 024014 (2015) | 10.1103/PhysRevD.91.024014 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the late time one-loop quantum backreaction from inflationary
fluctuations of a non-minimally coupled, massless scalar field. The scalar is
assumed to be a spectator field in an inflationary model with a constant
principal slow roll $\epsilon$ parameter. We regulate the infrared by matching
onto a pre-inf... | [
{
"created": "Wed, 20 Aug 2014 15:51:23 GMT",
"version": "v1"
}
] | 2015-01-14 | [
[
"Glavan",
"D.",
""
],
[
"Prokopec",
"T.",
""
],
[
"van der Woude",
"D.",
""
]
] | We consider the late time one-loop quantum backreaction from inflationary fluctuations of a non-minimally coupled, massless scalar field. The scalar is assumed to be a spectator field in an inflationary model with a constant principal slow roll $\epsilon$ parameter. We regulate the infrared by matching onto a pre-infla... |
1211.3889 | Eric Poisson | Peter Zimmerman, Ian Vega, Eric Poisson, Roland Haas | Self-force as a cosmic censor | 6 pages, 1 figure, to appear in Physical Review D | null | 10.1103/PhysRevD.87.041501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine Hubeny's scenario according to which a near-extremal
Reissner-Nordstr\"om black hole can absorb a particle and be driven toward an
over-extremal state in which the charge exceeds the mass, signaling the
destruction of the black hole. Our analysis incorporates the particle's
electromagnetic self-force and t... | [
{
"created": "Fri, 16 Nov 2012 13:47:04 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2013 19:47:17 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Zimmerman",
"Peter",
""
],
[
"Vega",
"Ian",
""
],
[
"Poisson",
"Eric",
""
],
[
"Haas",
"Roland",
""
]
] | We examine Hubeny's scenario according to which a near-extremal Reissner-Nordstr\"om black hole can absorb a particle and be driven toward an over-extremal state in which the charge exceeds the mass, signaling the destruction of the black hole. Our analysis incorporates the particle's electromagnetic self-force and the... |
0808.0826 | Narayan Banerjee | Sudipta Das | Aspects of quintessence matter - the driver of the late time
acceleration of the universe | 146 pages; thesis accepted for PhD. degree of Jadavpur University,
Kolkata, India | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present thesis is a collection of papers which deals with analytic models
that can drive the present accelerated expansion of the universe, starting from
a decelerated expansion in the early matter dominated regime. Both minimally
and non minimally coupled scalar fields are employed for the purpose.
Interaction b... | [
{
"created": "Wed, 6 Aug 2008 12:49:27 GMT",
"version": "v1"
}
] | 2008-08-07 | [
[
"Das",
"Sudipta",
""
]
] | The present thesis is a collection of papers which deals with analytic models that can drive the present accelerated expansion of the universe, starting from a decelerated expansion in the early matter dominated regime. Both minimally and non minimally coupled scalar fields are employed for the purpose. Interaction bet... |
2010.03066 | Sizheng Ma | Sizheng Ma, Hang Yu, Yanbei Chen | Detecting resonant tidal excitations of Rossby modes in coalescing
neutron-star binaries with third-generation gravitational-wave detectors | null | Phys. Rev. D 103, 063020 (2021) | 10.1103/PhysRevD.103.063020 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rossby modes (r-modes) of rotating neutron stars can be excited by the
gravitomagnetic forces in coalescing binary systems. The previous study by
Flanagan and Racine [Phys. Rev. D 75, 044001 (2007)] showed that this kind of
dynamical tide (DT) can induce phase shifts of 0.1 rad on gravitational
waveforms, which is de... | [
{
"created": "Tue, 6 Oct 2020 22:35:51 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Mar 2021 16:00:07 GMT",
"version": "v2"
}
] | 2021-03-16 | [
[
"Ma",
"Sizheng",
""
],
[
"Yu",
"Hang",
""
],
[
"Chen",
"Yanbei",
""
]
] | Rossby modes (r-modes) of rotating neutron stars can be excited by the gravitomagnetic forces in coalescing binary systems. The previous study by Flanagan and Racine [Phys. Rev. D 75, 044001 (2007)] showed that this kind of dynamical tide (DT) can induce phase shifts of 0.1 rad on gravitational waveforms, which is dete... |
1408.5906 | Gary T. Horowitz | Gary T. Horowitz and Jorge E. Santos | Geons and the Instability of Anti-de Sitter Spacetime | 15 pages, 2 figures; To appear in a special volume of "Surveys in
Differential Geometry" in order to celebrate 100 years of general relativity
theory | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly review the evidence that anti-de Sitter spacetime is nonlinearly
unstable, and the perturbative arguments that there should exist geons -
nonsingular solutions to Einstein's equation with a helical symmetry. We then
explicitly construct these geons numerically and discuss some of their
properties. We concl... | [
{
"created": "Mon, 25 Aug 2014 20:01:12 GMT",
"version": "v1"
}
] | 2014-08-27 | [
[
"Horowitz",
"Gary T.",
""
],
[
"Santos",
"Jorge E.",
""
]
] | We briefly review the evidence that anti-de Sitter spacetime is nonlinearly unstable, and the perturbative arguments that there should exist geons - nonsingular solutions to Einstein's equation with a helical symmetry. We then explicitly construct these geons numerically and discuss some of their properties. We conclud... |
0904.3581 | Daisuke Ida | Daisuke Ida | On the Topology of Black Lenses | 27 pages, 19 figures | Prog.Theor.Phys.122:987-1014,2010 | 10.1143/PTP.122.987 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The topological structure of the black holes in 5-dimensional space-times
with a horizon diffeomorphic with the lens space has been discussed. It has
been shown that such a black hole can emerge from the crease set, which is
composed of the plumbings of several 2-spheres, of the event horizon. It has
also been shown ... | [
{
"created": "Thu, 23 Apr 2009 01:51:10 GMT",
"version": "v1"
}
] | 2010-01-15 | [
[
"Ida",
"Daisuke",
""
]
] | The topological structure of the black holes in 5-dimensional space-times with a horizon diffeomorphic with the lens space has been discussed. It has been shown that such a black hole can emerge from the crease set, which is composed of the plumbings of several 2-spheres, of the event horizon. It has also been shown th... |
0805.4314 | Rajesh Nayak K | S. V. Dhurandhar, J-Y. Vinet and K. Rajesh Nayak | General relativistic treatment of LISA optical links | null | Class.Quant.Grav.25:245002,2008 | 10.1088/0264-9381/25/24/245002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LISA is a joint space mission of the NASA and the ESA for detecting low
frequency gravitational waves in the band $10^{-5} - 1$ Hz. In order to attain
the requisite sensitivity for LISA, the laser frequency noise must be
suppressed below the other secondary noises such as the optical path noise,
acceleration noise et... | [
{
"created": "Wed, 28 May 2008 11:31:25 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Dhurandhar",
"S. V.",
""
],
[
"Vinet",
"J-Y.",
""
],
[
"Nayak",
"K. Rajesh",
""
]
] | LISA is a joint space mission of the NASA and the ESA for detecting low frequency gravitational waves in the band $10^{-5} - 1$ Hz. In order to attain the requisite sensitivity for LISA, the laser frequency noise must be suppressed below the other secondary noises such as the optical path noise, acceleration noise etc.... |
2308.02864 | Vinod Kumar Bhardwaj Dr. | Vinod Kumar Bhardwaj and Anil Kumar Yadav | Observation constraints on scalar field cosmological model in
Anisotropic universe | 18 Pages, 15 figures, Accepted in IJGMMP | null | 10.1142/S0219887824501445 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this study, we have explored a scalar field cosmological model in the
axially symmetric Bianchi type-I universe. In this study, our aim is to
constrain the scalar field dark energy model in an anisotropic background. For
this purpose, the explicit solution of the developed field equations for the
model is determin... | [
{
"created": "Sat, 5 Aug 2023 12:29:36 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Aug 2023 01:59:25 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Mar 2024 05:39:02 GMT",
"version": "v3"
},
{
"created": "Fri, 29 Mar 2024 08:09:32 GMT",
"version": "v4"
}
] | 2024-04-01 | [
[
"Bhardwaj",
"Vinod Kumar",
""
],
[
"Yadav",
"Anil Kumar",
""
]
] | In this study, we have explored a scalar field cosmological model in the axially symmetric Bianchi type-I universe. In this study, our aim is to constrain the scalar field dark energy model in an anisotropic background. For this purpose, the explicit solution of the developed field equations for the model is determined... |
gr-qc/0105095 | Jaime F. Villas da Rocha | Jaime F. Villas da Rocha | Type II Fluid Solutions to Einstein Field Equations in N-Dimensional
Spherical Spacetimes | 16 pages, 2 figures, Revtex, three references added | Int.J.Mod.Phys. D11 (2002) 113-124 | null | null | gr-qc | null | A large class of Type II fluid solutions to Einstein field equations in
N-dimensional spherical spacetimes is found, wich includes most of the known
solutions. A family of the generalized collapsing Vaidya solutions with
homothetic self-similarity, parametrized by a constant $\lambda$, is studied,
and found that when... | [
{
"created": "Fri, 25 May 2001 22:42:52 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2001 18:35:07 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"da Rocha",
"Jaime F. Villas",
""
]
] | A large class of Type II fluid solutions to Einstein field equations in N-dimensional spherical spacetimes is found, wich includes most of the known solutions. A family of the generalized collapsing Vaidya solutions with homothetic self-similarity, parametrized by a constant $\lambda$, is studied, and found that when $... |
2310.12951 | Asier Alonso-Bardaji | Asier Alonso-Bardaji and David Brizuela | Spacetime geometry from canonical spherical gravity | Typo corrected in Eq. (54) and Appendix B added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study covariant models for vacuum spherical gravity within a canonical
setting. Starting from a general ansatz, we derive the most general family of
Hamiltonian constraints that are quadratic in first-order and linear in
second-order spatial derivatives of the triad variables, and obey certain
specific covariance ... | [
{
"created": "Thu, 19 Oct 2023 17:51:54 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2024 10:53:31 GMT",
"version": "v2"
}
] | 2024-02-20 | [
[
"Alonso-Bardaji",
"Asier",
""
],
[
"Brizuela",
"David",
""
]
] | We study covariant models for vacuum spherical gravity within a canonical setting. Starting from a general ansatz, we derive the most general family of Hamiltonian constraints that are quadratic in first-order and linear in second-order spatial derivatives of the triad variables, and obey certain specific covariance co... |
0704.2302 | Mohammad Vahid Takook | M. Naseri, S. Rouhani and M.V. Takook | Casimir effect on nontrivial topology spaces in Krein space quantization | 6 pages | null | null | null | gr-qc | null | Casimir effect of a topologically nontrivial two-dimensional space-time,
through Krein space quantization [1,2], has been calculated. In other words,
auxiliary negative norm states have been utilized here. Presence of negative
norm states play the role of an automatic renormalization device for the
theory. The negati... | [
{
"created": "Wed, 18 Apr 2007 09:33:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Naseri",
"M.",
""
],
[
"Rouhani",
"S.",
""
],
[
"Takook",
"M. V.",
""
]
] | Casimir effect of a topologically nontrivial two-dimensional space-time, through Krein space quantization [1,2], has been calculated. In other words, auxiliary negative norm states have been utilized here. Presence of negative norm states play the role of an automatic renormalization device for the theory. The negative... |
gr-qc/0507043 | Farhad Darabi | F. Darabi, M. R. Setare | Casimir effect in a two dimensional signature changing spacetime | 14 pages, abstract and text extended, references added, to appear in
JMP | J.Math.Phys. 47 (2006) 032501 | 10.1063/1.2174291 | null | gr-qc | null | We study the Casimir effect for free massless scalar fields propagating on a
two-dimensional cylinder with a metric that admits a change of signature from
Lorentzian to Euclidean. We obtain a nonzero pressure, on the hypersurfaces of
signature change, which destabilizes the signature changing region and so
alters the... | [
{
"created": "Sat, 9 Jul 2005 12:14:50 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Aug 2005 08:23:12 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Feb 2006 19:56:46 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Darabi",
"F.",
""
],
[
"Setare",
"M. R.",
""
]
] | We study the Casimir effect for free massless scalar fields propagating on a two-dimensional cylinder with a metric that admits a change of signature from Lorentzian to Euclidean. We obtain a nonzero pressure, on the hypersurfaces of signature change, which destabilizes the signature changing region and so alters the e... |
1201.2519 | Gerardo Morsella | Sergio Doplicher, Gerardo Morsella, Nicola Pinamonti | On Quantum Spacetime and the horizon problem | 26 pages. v3: several discussions and clarifications added, misprints
corrected | J. Geom. Phys. 74 (2013), 196-210 | 10.1016/j.geomphys.2013.08.003 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the special case of a spherically symmetric solution of Einstein equations
coupled to a scalar massless field, we examine the consequences on the exact
solution imposed by a semiclassical treatment of gravitational interaction when
the scalar field is quantized. In agreement with the work of Doplicher,
Fredenhagen... | [
{
"created": "Thu, 12 Jan 2012 10:31:27 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Apr 2012 10:10:37 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Sep 2013 15:07:22 GMT",
"version": "v3"
}
] | 2015-06-03 | [
[
"Doplicher",
"Sergio",
""
],
[
"Morsella",
"Gerardo",
""
],
[
"Pinamonti",
"Nicola",
""
]
] | In the special case of a spherically symmetric solution of Einstein equations coupled to a scalar massless field, we examine the consequences on the exact solution imposed by a semiclassical treatment of gravitational interaction when the scalar field is quantized. In agreement with the work of Doplicher, Fredenhagen a... |
1002.3302 | Martin Reiris | Martin Reiris | Scalar curvature, isoperimetric collapse and General Relativity in the
Constant Mean Curvature gauge | 22 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a set of relations, set in the form of results, conjectures and
problems, between the L^{2}-norm of the Ricci curvature of a 3-manifold, the
scalar curvature and the volume radius. We illustrate the scope of these
relations with potential applications to the Einstein Constant Mean Curvature
flow (or GR see... | [
{
"created": "Wed, 17 Feb 2010 16:25:33 GMT",
"version": "v1"
}
] | 2010-02-18 | [
[
"Reiris",
"Martin",
""
]
] | We discuss a set of relations, set in the form of results, conjectures and problems, between the L^{2}-norm of the Ricci curvature of a 3-manifold, the scalar curvature and the volume radius. We illustrate the scope of these relations with potential applications to the Einstein Constant Mean Curvature flow (or GR seen ... |
2010.04298 | Gregory Horndeski | Gregory W. Horndeski | The Hidden Scalar Lagrangians within Horndeski Theory | 9 pages. This essay won an honorable mention in the Gravitational
Research Foundation's 2020 competition for essays on gravitation | International Journal of Modern Physics D, 2020-09-09 | 10.1142/S021827182043004X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this essay I show that there exists a new way to obtain scalar-tensor
field theories by combining a special scalar field on the tangent bundle of a
four-dimensional manifold with a scalar field on that manifold. These two
scalar fields act as a generating function for the metric tensor. When using
these two scalar... | [
{
"created": "Thu, 8 Oct 2020 23:22:14 GMT",
"version": "v1"
}
] | 2020-10-12 | [
[
"Horndeski",
"Gregory W.",
""
]
] | In this essay I show that there exists a new way to obtain scalar-tensor field theories by combining a special scalar field on the tangent bundle of a four-dimensional manifold with a scalar field on that manifold. These two scalar fields act as a generating function for the metric tensor. When using these two scalar f... |
1507.03884 | Amitabha Lahiri | Subhasish Chakrabarty and Amitabha Lahiri | Weak field limit in vierbein-Einstein-Palatini formalism and Fierz-Pauli
Equation | 18 pages; v3: some references added, differences with existing work
emphasized | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the weak field limit of gravity in the vierbein-Einstein-Palatini
formalism, find the action and the equations for perturbations around an
arbitrary background, and compare them with the usual metric perturbation
equations. We also write the Fierz-Pauli equations for massive gravitons on an
arbitrary curv... | [
{
"created": "Tue, 14 Jul 2015 15:19:41 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 2015 15:25:26 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Dec 2015 14:08:03 GMT",
"version": "v3"
}
] | 2015-12-29 | [
[
"Chakrabarty",
"Subhasish",
""
],
[
"Lahiri",
"Amitabha",
""
]
] | We consider the weak field limit of gravity in the vierbein-Einstein-Palatini formalism, find the action and the equations for perturbations around an arbitrary background, and compare them with the usual metric perturbation equations. We also write the Fierz-Pauli equations for massive gravitons on an arbitrary curved... |
1507.03131 | Ovidiu Cristinel Stoica | Ovidiu Cristinel Stoica | The geometry of singularities and the black hole information paradox | 8 pages, 1 figure. Talk given at Seventh International Workshop DICE
2014: Spacetime - Matter - Quantum Mechanics ... news on missing links,
Castiglioncello (Tuscany, Italy), September 15-19, 2014 | J. Phys.: Conf. Ser. 626 012028, 2015 | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The information loss occurs in an evaporating black hole only if the time
evolution ends at the singularity. But as we shall see, the black hole
solutions admit analytical extensions beyond the singularities, to globally
hyperbolic solutions. The method used is similar to that for the apparent
singularity at the even... | [
{
"created": "Sat, 11 Jul 2015 17:58:57 GMT",
"version": "v1"
}
] | 2015-07-14 | [
[
"Stoica",
"Ovidiu Cristinel",
""
]
] | The information loss occurs in an evaporating black hole only if the time evolution ends at the singularity. But as we shall see, the black hole solutions admit analytical extensions beyond the singularities, to globally hyperbolic solutions. The method used is similar to that for the apparent singularity at the event ... |
2203.16990 | Fabio Moretti | Fabio Moretti, Matteo Del Prete, Giovanni Montani | Linear analysis of the gravitational beam-plasma instability | Revised version, two sections added + minor changes | null | 10.1140/epjc/s10052-023-11647-z | null | gr-qc astro-ph.HE physics.plasm-ph | http://creativecommons.org/licenses/by/4.0/ | We investigate the well-known phenomenon of the beam-plasma instability in
the gravitational sector, when a fast population of particles interacts with
the massive scalar mode of an Horndeski theory of gravity, resulting into the
linear growth of the latter amplitude. Following the approach used in the
standard elect... | [
{
"created": "Thu, 31 Mar 2022 12:27:48 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2023 17:02:28 GMT",
"version": "v2"
}
] | 2023-06-28 | [
[
"Moretti",
"Fabio",
""
],
[
"Del Prete",
"Matteo",
""
],
[
"Montani",
"Giovanni",
""
]
] | We investigate the well-known phenomenon of the beam-plasma instability in the gravitational sector, when a fast population of particles interacts with the massive scalar mode of an Horndeski theory of gravity, resulting into the linear growth of the latter amplitude. Following the approach used in the standard electro... |
2304.00475 | Xun Xue | Wei Lin, Xun Xue | Dirac and Majorana neutrino scattering by cosmic torsion in spatial-flat
FRW spacetime background | 11 pages, 0 figure | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The possibility of distinguishing Dirac and Majorana fermions by cosmic
torsion in the spatial-flat FRW spacetime is discussed. The scattering
amplitudes of two types of fermions deviate from each other by the vector part
of torsion in non-minimal coupling case. The scattering of massive fermions by
cosmic torsion le... | [
{
"created": "Sun, 2 Apr 2023 07:20:54 GMT",
"version": "v1"
}
] | 2023-04-04 | [
[
"Lin",
"Wei",
""
],
[
"Xue",
"Xun",
""
]
] | The possibility of distinguishing Dirac and Majorana fermions by cosmic torsion in the spatial-flat FRW spacetime is discussed. The scattering amplitudes of two types of fermions deviate from each other by the vector part of torsion in non-minimal coupling case. The scattering of massive fermions by cosmic torsion lead... |
2301.00826 | Ignacio A. Reyes | Ignacio A. Reyes, Giovanni Maria Tomaselli | Quantum Field Theory on compact stars near the Buchdahl limit | 6 pages, 2 figures. Updated the title and abstract, as well as minor
changes in the main text | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Very compact stars seem to be forbidden in General Relativity. While
Buchdahl's theorem sets an upper bound on compactness, further no-go results
rely on the existence of two light rings, the inner of which has been
associated to gravitational instabilities. However, little is known about the
role of quantum fields i... | [
{
"created": "Mon, 2 Jan 2023 19:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Sep 2023 13:51:09 GMT",
"version": "v2"
}
] | 2023-09-11 | [
[
"Reyes",
"Ignacio A.",
""
],
[
"Tomaselli",
"Giovanni Maria",
""
]
] | Very compact stars seem to be forbidden in General Relativity. While Buchdahl's theorem sets an upper bound on compactness, further no-go results rely on the existence of two light rings, the inner of which has been associated to gravitational instabilities. However, little is known about the role of quantum fields in ... |
2204.11609 | Burin Gumjudpai | Phichayoot Baisri (IF Naresuan U. & NAS Mahidol U.), Burin Gumjudpai
(NAS Mahidol U.), Chonticha Kritpetch (U. of Phayao & NAS Mahidol U.) and
Pichet Vanichchapongjaroen (IF Naresuan U.) | Cosmology in holographic non-minimal derivative coupling theory:
constraints from inflation and variation of gravitational constant | 15 pages, 2 figures, 1 table, accepted by Physics of the Dark
Universe | Physics of the Dark Universe, Volume 41, August 2023, 101251 | 10.1016/j.dark.2023.101251 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a cosmological model of non-minimal derivative coupling (NMDC) to
gravity with holographic effect from Bekenstein-Hawking entropy using Hubble
horizon IR cutoff. Holographic parameter $c$ is constant in a range, $0 \leq c
< 1$. NMDC effect allows gravitational constant to be time-varying. Definition
of ho... | [
{
"created": "Thu, 21 Apr 2022 21:20:12 GMT",
"version": "v1"
},
{
"created": "Sat, 13 May 2023 11:23:58 GMT",
"version": "v2"
}
] | 2023-05-23 | [
[
"Baisri",
"Phichayoot",
"",
"IF Naresuan U. & NAS Mahidol U."
],
[
"Gumjudpai",
"Burin",
"",
"NAS Mahidol U."
],
[
"Kritpetch",
"Chonticha",
"",
"U. of Phayao & NAS Mahidol U."
],
[
"Vanichchapongjaroen",
"Pichet",
"",
"IF Naresuan U."
... | We consider a cosmological model of non-minimal derivative coupling (NMDC) to gravity with holographic effect from Bekenstein-Hawking entropy using Hubble horizon IR cutoff. Holographic parameter $c$ is constant in a range, $0 \leq c < 1$. NMDC effect allows gravitational constant to be time-varying. Definition of holo... |
1707.08426 | Tanja Hinderer | Tanja Hinderer and Stanislav Babak | Foundations of an effective-one-body model for coalescing binaries on
eccentric orbits | 25 pages, 8 figures, small changes to match published version | Phys. Rev. D 96, 104048 (2017) | 10.1103/PhysRevD.96.104048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the foundations of an effective-one-body (EOB) model for eccentric
binary coalescences that includes the conservative dynamics, radiation
reaction, and gravitational waveform modes from the inspiral and the
merger-ringdown signals. We use the same approach as is commonly employed in
black-hole perturbation... | [
{
"created": "Wed, 26 Jul 2017 13:22:23 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2018 15:16:35 GMT",
"version": "v2"
}
] | 2018-01-08 | [
[
"Hinderer",
"Tanja",
""
],
[
"Babak",
"Stanislav",
""
]
] | We develop the foundations of an effective-one-body (EOB) model for eccentric binary coalescences that includes the conservative dynamics, radiation reaction, and gravitational waveform modes from the inspiral and the merger-ringdown signals. We use the same approach as is commonly employed in black-hole perturbation t... |
1003.3679 | Carlos Alex Souza da Silva M.Sc | C.A.S. Silva and R.R. Landim | A note on black hole entropy, area spectrum, and evaporation | 4 pages, 2 figures | null | 10.1209/0295-5075/96/10007 | null | gr-qc hep-th | http://creativecommons.org/licenses/publicdomain/ | We argue that a process where a fuzzy space splits in two others can be used
to explain the origin of the black hole entropy, and why a "generalized second
law of thermodynamics" appears to hold in the presence of black holes. We reach
the Bekenstein-Hawking formula from the count of the microstates of a black
hole m... | [
{
"created": "Thu, 18 Mar 2010 20:39:16 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Apr 2010 14:34:13 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Silva",
"C. A. S.",
""
],
[
"Landim",
"R. R.",
""
]
] | We argue that a process where a fuzzy space splits in two others can be used to explain the origin of the black hole entropy, and why a "generalized second law of thermodynamics" appears to hold in the presence of black holes. We reach the Bekenstein-Hawking formula from the count of the microstates of a black hole mod... |
1111.4698 | Paul Wesson | Paul S. Wesson | Particle Masses and the Cosmological 'Constant' in Five Dimensions | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I give metrics and equations of motion in 5D general relativity, and use the
conservation of momentum and conformal transformations to study the possible
variability of particle masses and the cosmological 'constant'. It is feasible
that all particles are photon-like and travel on null paths in 5D, that massive
parti... | [
{
"created": "Sun, 20 Nov 2011 22:45:35 GMT",
"version": "v1"
}
] | 2011-11-22 | [
[
"Wesson",
"Paul S.",
""
]
] | I give metrics and equations of motion in 5D general relativity, and use the conservation of momentum and conformal transformations to study the possible variability of particle masses and the cosmological 'constant'. It is feasible that all particles are photon-like and travel on null paths in 5D, that massive particl... |
1605.06063 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Cyclic and heteroclinic flows near general static spherically symmetric
black holes: Semi-cyclic flows -- Addendum and corrigendum | 6 pages, 3 figures, New title | Eur. Phys. J. C (2017) 77: 36 | 10.1140/epjc/s10052-017-4613-3 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new accretion solutions of a polytropic perfect fluid onto an
f(R)-gravity de Sitter-like black hole. We consider two f(R)-gravity models and
obtain finite-period cyclic flows oscillating between the event and
cosmological horizons as well as semi-cyclic critical flows executing a two-way
motion from and b... | [
{
"created": "Thu, 19 May 2016 17:39:01 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jan 2017 06:41:59 GMT",
"version": "v2"
}
] | 2017-01-20 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | We present new accretion solutions of a polytropic perfect fluid onto an f(R)-gravity de Sitter-like black hole. We consider two f(R)-gravity models and obtain finite-period cyclic flows oscillating between the event and cosmological horizons as well as semi-cyclic critical flows executing a two-way motion from and bac... |
2004.06117 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Gravitational field of a pit and maximal mass defects | 10 pages, 3 figures, 1 table | Physical Review D 102, 044060 (2020) | 10.1103/PhysRevD.102.044060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general relativistic solution, composed of a Zel'dovich-Letelier interior
made of radial strings matched through a spherical thin shell at radius $r_0$
to an exterior Schwarzschild solution with mass $m$, is presented. It is the
Zel'dovich-Letelier-Schwarzschild star. When the radius $r_0$ of the star is
shrunk to ... | [
{
"created": "Mon, 13 Apr 2020 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2020 15:53:23 GMT",
"version": "v2"
}
] | 2020-09-16 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | A general relativistic solution, composed of a Zel'dovich-Letelier interior made of radial strings matched through a spherical thin shell at radius $r_0$ to an exterior Schwarzschild solution with mass $m$, is presented. It is the Zel'dovich-Letelier-Schwarzschild star. When the radius $r_0$ of the star is shrunk to it... |
2012.11520 | Shyam Das | Shyam Das, Bikram Keshari Parida, Ranjan Sharma | Tidal love number of a static spherically symmetric anisotropic compact
star | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Tidal deformability of a coalescing neutron star subjected to an external
tidal field plays an important role in our probe for the structure and
properties of compact stars. In particular, the tidal love number provides
valuable information about the external gravitational field responsible for
deforming the star. In... | [
{
"created": "Mon, 21 Dec 2020 17:33:22 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Dec 2020 07:16:19 GMT",
"version": "v2"
}
] | 2020-12-24 | [
[
"Das",
"Shyam",
""
],
[
"Parida",
"Bikram Keshari",
""
],
[
"Sharma",
"Ranjan",
""
]
] | Tidal deformability of a coalescing neutron star subjected to an external tidal field plays an important role in our probe for the structure and properties of compact stars. In particular, the tidal love number provides valuable information about the external gravitational field responsible for deforming the star. In t... |
2312.09415 | Ugur Camci | Ugur Camci | Noether symmetries of the minimal surface Lagrangian for G\"{o}del-type
spacetimes | 18 pages, no figures, one table, submitted to Int.J.Geom.Meth.Modern
Phys. arXiv admin note: text overlap with arXiv:1404.4270 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the Noether symmetries of the minimal surface Lagrangian for
four classes of metrics in G\"{o}del-type spacetimes. Then, calculating the
Noether symmetries for all classes, namely, classes I, II, III and IV, we
determine the conserved fields corresponding to each classes, allowing us to
derive a compre... | [
{
"created": "Fri, 15 Dec 2023 00:36:04 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2024 17:43:29 GMT",
"version": "v2"
}
] | 2024-07-10 | [
[
"Camci",
"Ugur",
""
]
] | We investigate the Noether symmetries of the minimal surface Lagrangian for four classes of metrics in G\"{o}del-type spacetimes. Then, calculating the Noether symmetries for all classes, namely, classes I, II, III and IV, we determine the conserved fields corresponding to each classes, allowing us to derive a comprehe... |
2203.03924 | Jaime De Cabo Martin | Jaime de Cabo Martin | The primordial structure from Quantum Cosmological bouncing models | Contribution to the 2022 Cosmology session of the 56th Rencontres de
Moriond | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By quantizing the background as well as the perturbations in a simple one
fluid cosmological model, we show that there exists an ambiguity in the choice
of relevant variables, potentially leading to incompatible observational
physical predictions. In a classical inflationary background, the exact same
canonical trans... | [
{
"created": "Tue, 8 Mar 2022 08:44:14 GMT",
"version": "v1"
}
] | 2022-03-09 | [
[
"Martin",
"Jaime de Cabo",
""
]
] | By quantizing the background as well as the perturbations in a simple one fluid cosmological model, we show that there exists an ambiguity in the choice of relevant variables, potentially leading to incompatible observational physical predictions. In a classical inflationary background, the exact same canonical transfo... |
gr-qc/0011105 | Tarun Deep Saini | Roy Maartens, Varun Sahni, Tarun Deep Saini | Anisotropy dissipation in brane-world inflation | 6 pages, 5 figures; minor typo corrected in Eq. (16); matches version
to appear in Phy Rev D | Phys.Rev. D63 (2001) 063509 | 10.1103/PhysRevD.63.063509 | null | gr-qc astro-ph hep-ph hep-th | null | We examine the behavior of an anisotropic brane-world in the presence of
inflationary scalar fields. We show that, contrary to naive expectations, a
large anisotropy does not adversely affect inflation. On the contrary, a large
initial anisotropy introduces more damping into the scalar field equation of
motion, resul... | [
{
"created": "Wed, 29 Nov 2000 13:45:18 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2000 16:13:22 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Feb 2001 09:47:58 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Maartens",
"Roy",
""
],
[
"Sahni",
"Varun",
""
],
[
"Saini",
"Tarun Deep",
""
]
] | We examine the behavior of an anisotropic brane-world in the presence of inflationary scalar fields. We show that, contrary to naive expectations, a large anisotropy does not adversely affect inflation. On the contrary, a large initial anisotropy introduces more damping into the scalar field equation of motion, resulti... |
1904.11264 | Sergey Yu. Vernov | S.V. Chervon, I.V. Fomin, E.O. Pozdeeva, M. Sami, S.Yu. Vernov | Superpotential method for chiral cosmological models connected with
modified gravity | 27 pages, minor clarifications added, typos corrected, revised
version to appear in Phys. Rev. D | Phys. Rev. D 100, 063522 (2019) | 10.1103/PhysRevD.100.063522 | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Chiral Cosmological Models (CCMs) and modified gravity
theories associated with them. Generalization of the superpotential method for
a general CCM with several scalar fields is performed, and the method of
construction CCMs admitting exact solutions is developed. New classes of exact
solutions in the... | [
{
"created": "Thu, 25 Apr 2019 11:28:26 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 15:07:11 GMT",
"version": "v2"
}
] | 2019-09-25 | [
[
"Chervon",
"S. V.",
""
],
[
"Fomin",
"I. V.",
""
],
[
"Pozdeeva",
"E. O.",
""
],
[
"Sami",
"M.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We consider the Chiral Cosmological Models (CCMs) and modified gravity theories associated with them. Generalization of the superpotential method for a general CCM with several scalar fields is performed, and the method of construction CCMs admitting exact solutions is developed. New classes of exact solutions in the t... |
gr-qc/0104050 | Tekin Dereli | T. Dereli, R. W. Tucker (Lancaster U.) | On the Detection of Scalar Field Induced Spacetime Torsion | 5 pages REVTEX file. 1 figure | Mod.Phys.Lett. A17 (2002) 421-428 | 10.1142/S021773230200662X | null | gr-qc | null | We argue that the geodesic hypothesis based on the autoparalllels of the
Levi-Civita connection may need refinement in the scalar- tensor theories of
gravity. Based on a reformulation of the Brans- Dicke theory in terms of a
connection with torsion determined dynamically in terms of the gradient of the
Brans-Dicke sc... | [
{
"created": "Tue, 17 Apr 2001 10:30:15 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dereli",
"T.",
"",
"Lancaster U."
],
[
"Tucker",
"R. W.",
"",
"Lancaster U."
]
] | We argue that the geodesic hypothesis based on the autoparalllels of the Levi-Civita connection may need refinement in the scalar- tensor theories of gravity. Based on a reformulation of the Brans- Dicke theory in terms of a connection with torsion determined dynamically in terms of the gradient of the Brans-Dicke scal... |
1808.01669 | Supriya Pan | Weiqiang Yang, Supriya Pan, Ram\'on Herrera and Subenoy Chakraborty | Large-scale (in-) stability Analysis of an Exactly Solved Coupled
Dark-Energy Model | 24 pages, many figures; Accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.98.043517 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming a non-gravitational interaction amongst the dark fluids of our
universe namely, the dark matter and dark energy, we study a specific
interaction model in the background of a spatially flat
Friedmann-Lema\^itre-Robertson-Walker geometry. The interaction model, as we
found, solves the background evolution in a... | [
{
"created": "Sun, 5 Aug 2018 18:36:42 GMT",
"version": "v1"
}
] | 2018-08-29 | [
[
"Yang",
"Weiqiang",
""
],
[
"Pan",
"Supriya",
""
],
[
"Herrera",
"Ramón",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Assuming a non-gravitational interaction amongst the dark fluids of our universe namely, the dark matter and dark energy, we study a specific interaction model in the background of a spatially flat Friedmann-Lema\^itre-Robertson-Walker geometry. The interaction model, as we found, solves the background evolution in an ... |
1702.05185 | Yuri Obukhov | Yuri N. Obukhov | Gravitational waves in Poincar\'e gauge gravity theory | 12 pages, Revtex. Minor changes | Phys. Rev. D 95, 084028 (2017) | 10.1103/PhysRevD.95.084028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the exact gravitational wave solutions in a general class of
quadratic Poincar\'e gauge gravity models. The Lagrangian includes all possible
linear and quadratic invariants constructed from the torsion and the curvature,
including the parity odd terms. The ansatz for the gravitational wave
configuration and... | [
{
"created": "Thu, 16 Feb 2017 23:37:57 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Apr 2017 20:36:26 GMT",
"version": "v2"
}
] | 2017-04-18 | [
[
"Obukhov",
"Yuri N.",
""
]
] | We derive the exact gravitational wave solutions in a general class of quadratic Poincar\'e gauge gravity models. The Lagrangian includes all possible linear and quadratic invariants constructed from the torsion and the curvature, including the parity odd terms. The ansatz for the gravitational wave configuration and t... |
gr-qc/9712049 | Miss E. Winstanley | N.E. Mavromatos and E. Winstanley | Existence Theorems for Hairy Black Holes in su(N) Einstein-Yang-Mills
theories | 64 pages, latex2e, minor changes on the nature of the parameters,
version to appear in J. Math. Phys | J.Math.Phys. 39 (1998) 4849-4873 | 10.1063/1.532538 | null | gr-qc hep-th | null | We establish the existence of hairy black holes in su(N) Einstein-Yang-Mills
theories, described by N-1 parameters, corresponding to the nodes of the gauge
field functions.
| [
{
"created": "Thu, 11 Dec 1997 12:57:06 GMT",
"version": "v1"
},
{
"created": "Fri, 1 May 1998 10:25:04 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Mavromatos",
"N. E.",
""
],
[
"Winstanley",
"E.",
""
]
] | We establish the existence of hairy black holes in su(N) Einstein-Yang-Mills theories, described by N-1 parameters, corresponding to the nodes of the gauge field functions. |
2307.12222 | Syed Masood A. S. Bukhari | Syed Masood A. S. Bukhari, Li-Gang Wang | Atom-field dynamics in curved spacetime | 34 pages, 5 figures | Front. Phys. 19, 54203 (2024) | 10.1007/s11467-024-1400-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Some aspects of atom-field interactions in curved spacetime are reviewed. Of
great interest are quantum radiative and entanglement processes arising out of
Rindler and black hole spacetimes, which involve the role of Hawking-Unruh and
dynamical Casimir effects. Most of the discussion surrounds the radiative part
of i... | [
{
"created": "Sun, 23 Jul 2023 04:09:19 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Aug 2023 12:26:11 GMT",
"version": "v2"
},
{
"created": "Thu, 16 May 2024 15:01:57 GMT",
"version": "v3"
}
] | 2024-05-17 | [
[
"Bukhari",
"Syed Masood A. S.",
""
],
[
"Wang",
"Li-Gang",
""
]
] | Some aspects of atom-field interactions in curved spacetime are reviewed. Of great interest are quantum radiative and entanglement processes arising out of Rindler and black hole spacetimes, which involve the role of Hawking-Unruh and dynamical Casimir effects. Most of the discussion surrounds the radiative part of int... |
1308.5648 | I\~naki Garay | Jacobo Diaz-Polo, I\~naki Garay | Semiclassical states in quantum gravity: Curvature associated to a
Voronoi graph | 21 pages. Minor corrections, as published in Classical and Quantum
Gravity | Class.Quant.Grav. 31 (2014) 085018 | 10.1088/0264-9381/31/8/085018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The building blocks of a quantum theory of general relativity are expected to
be discrete structures. Loop quantum gravity is formulated using a basis of
spin networks (wave functions over oriented graphs with coloured edges), thus
realizing the aforementioned expectation. Semiclassical states should, however,
reprod... | [
{
"created": "Mon, 26 Aug 2013 17:53:42 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Apr 2014 17:13:47 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Garay",
"Iñaki",
""
]
] | The building blocks of a quantum theory of general relativity are expected to be discrete structures. Loop quantum gravity is formulated using a basis of spin networks (wave functions over oriented graphs with coloured edges), thus realizing the aforementioned expectation. Semiclassical states should, however, reproduc... |
gr-qc/9811022 | Mikhail Kalmykov | M.Yu.Kalmykov and P. I. Pronin | The one-loop divergences of the linear gravity with the torsion terms in
tetrad approach | LaTeX, 10 pages, to appear in Mod.Phys.Lett.A | Mod.Phys.Lett. A13 (1998) 2827-2838 | 10.1142/S0217732398003004 | null | gr-qc | null | In this paper we discuss the connection between the geometric and tetrad
approaches in the quantum affine-metric gravity. The corresponding transition
formulas are obtained at the one-loop level. As an example, the one-loop
counterterms are calculated in the tetrad formalism in the theory with terms
quadratic in the ... | [
{
"created": "Fri, 6 Nov 1998 17:33:10 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kalmykov",
"M. Yu.",
""
],
[
"Pronin",
"P. I.",
""
]
] | In this paper we discuss the connection between the geometric and tetrad approaches in the quantum affine-metric gravity. The corresponding transition formulas are obtained at the one-loop level. As an example, the one-loop counterterms are calculated in the tetrad formalism in the theory with terms quadratic in the to... |
2403.09757 | Behzad Eslam Panah | B. Eslam Panah, S. Zare, and H. Hassanabadi | Accelerating AdS black holes in gravity's rainbow | 12 pages, 4 figures, 1 table | Eur. Phys. J. C 84, 259 (2024) | 10.1140/epjc/s10052-024-12624-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the effect of the energy of moving particles in $C-$metric, we
first obtain exact accelerating black hole solutions in gravity's rainbow.
Then, we study the effects of gravity's rainbow and $C-$metric parameters on
the Ricci and Kretschmann scalars, and also the asymptotical behavior of this
solution. Ne... | [
{
"created": "Thu, 14 Mar 2024 15:00:39 GMT",
"version": "v1"
}
] | 2024-03-18 | [
[
"Panah",
"B. Eslam",
""
],
[
"Zare",
"S.",
""
],
[
"Hassanabadi",
"H.",
""
]
] | Motivated by the effect of the energy of moving particles in $C-$metric, we first obtain exact accelerating black hole solutions in gravity's rainbow. Then, we study the effects of gravity's rainbow and $C-$metric parameters on the Ricci and Kretschmann scalars, and also the asymptotical behavior of this solution. Next... |
gr-qc/9910035 | J. W. van Holten | J.W. van Holten | Killing-Yano tensors, non-standard supersymmetries and an index theorem | Contr. to Proceedings Journees Relativistes, Weimar 1999; 5 pages | Annalen Phys.9SI:83-87,2000 | null | NIKHEF/99-026 | gr-qc | null | The existence of Killing-Yano tensors on space-times can be probed by
spinning particles. Specifically, Dirac particles possess new fermionic
constants of motion corresponding to non-standard supersymmetries on the
particle worldline. A geometrical duality connects space-times with
Killing-Yano structure, but without... | [
{
"created": "Mon, 11 Oct 1999 10:21:27 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"van Holten",
"J. W.",
""
]
] | The existence of Killing-Yano tensors on space-times can be probed by spinning particles. Specifically, Dirac particles possess new fermionic constants of motion corresponding to non-standard supersymmetries on the particle worldline. A geometrical duality connects space-times with Killing-Yano structure, but without t... |
1901.04460 | Claudio Simeone | Ernesto F. Eiroa, Emilio Rubin de Celis, Claudio Simeone | Thin shells associated to black string spacetimes | 14 pages, 4 figures; v2: minor changes, new references added | Eur.Phys.J. C (2019) 79:272 | 10.1140/epjc/s10052-019-6747-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study thin shells of matter connecting charged black
string geometries with different values of the corresponding parameters. We
analyze the matter content and the mechanical stability of the shells
undergoing perturbations that preserve the cylindrical symmetry. Two different
global configuration... | [
{
"created": "Mon, 14 Jan 2019 18:53:04 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2019 17:35:13 GMT",
"version": "v2"
}
] | 2019-03-29 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"de Celis",
"Emilio Rubin",
""
],
[
"Simeone",
"Claudio",
""
]
] | In this article, we study thin shells of matter connecting charged black string geometries with different values of the corresponding parameters. We analyze the matter content and the mechanical stability of the shells undergoing perturbations that preserve the cylindrical symmetry. Two different global configurations ... |
1905.02021 | Arthur Suvorov Dr. | Arthur G Suvorov | Gravitational perturbations of a Kerr black hole in $f(R)$ gravity | 8 pages. Accepted for publication in Phys. Rev. D | Phys. Rev. D 99, 124026 (2019) | 10.1103/PhysRevD.99.124026 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified theories of gravity are often built such that they contain general
relativity as a limiting case. This inclusion property implies that the Kerr
metric is common to many families of theories. For example, all analytic $f(R)$
theories with vanishing constant term admit the Kerr solution. In any given
theory, h... | [
{
"created": "Mon, 6 May 2019 13:12:53 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2019 06:45:45 GMT",
"version": "v2"
}
] | 2019-06-26 | [
[
"Suvorov",
"Arthur G",
""
]
] | Modified theories of gravity are often built such that they contain general relativity as a limiting case. This inclusion property implies that the Kerr metric is common to many families of theories. For example, all analytic $f(R)$ theories with vanishing constant term admit the Kerr solution. In any given theory, how... |
2006.06749 | Jorge Gigante Valcarcel | Sebastian Bahamonde and Jorge Gigante Valcarcel | New models with independent dynamical torsion and nonmetricity fields | 15 pages, 0 figures, minor changes, references added. It matches the
version published in JCAP | null | 10.1088/1475-7516/2020/09/057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a gravitational model which allows the independent dynamical
behaviour of the torsion and nonmetricity fields to be displayed in the
framework of Metric-Affine gauge theory of gravity. For this task, we derive a
new exact black hole solution referred to this model which extends the role of
torsion of the m... | [
{
"created": "Thu, 11 Jun 2020 19:06:52 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 2020 17:18:38 GMT",
"version": "v2"
}
] | 2020-10-14 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Valcarcel",
"Jorge Gigante",
""
]
] | We propose a gravitational model which allows the independent dynamical behaviour of the torsion and nonmetricity fields to be displayed in the framework of Metric-Affine gauge theory of gravity. For this task, we derive a new exact black hole solution referred to this model which extends the role of torsion of the mai... |
gr-qc/9812070 | Ibrahim Arbab Arbab | Arbab I. Arbab | The Universe With Bulk Viscosity | 7 LateX pages, no figures | Chin.J.Astron.Astrophys.3:113,2003 | 10.1088/1009-9271/3/2/113 | null | gr-qc | null | Exact solutions for a model with variable $G$, $\Lambda$ and bulk viscosity
are obtained. Inflationary solutions with constant (de Sitter-type) and
variable energy density are found. An expanding anisotropic universe is found
to isotropize during its course of expansion but a static universe is not. The
gravitational... | [
{
"created": "Sun, 20 Dec 1998 15:58:25 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Apr 2003 17:05:40 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Arbab",
"Arbab I.",
""
]
] | Exact solutions for a model with variable $G$, $\Lambda$ and bulk viscosity are obtained. Inflationary solutions with constant (de Sitter-type) and variable energy density are found. An expanding anisotropic universe is found to isotropize during its course of expansion but a static universe is not. The gravitational c... |
1909.11965 | Ben David Normann Mr. | Ben David Normann, Sigbj{\o}rn Hervik, Angelo Ricciardone and Mikjel
Thorsrud | A study of inhomogeneous massless scalar gauge fields in cosmology | Conference proceedings, 6 pages | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Why is the Universe so homogeneous and isotropic? We summarize a general
study of a $\gamma$-law perfect fluid alongside an inhomogeneous, massless
scalar gauge field (with homogeneous gradient) in anisotropic spaces with
General Relativity. The anisotropic matter sector is implemented as a $j$-form
(field-strength l... | [
{
"created": "Thu, 26 Sep 2019 08:11:45 GMT",
"version": "v1"
}
] | 2019-09-27 | [
[
"Normann",
"Ben David",
""
],
[
"Hervik",
"Sigbjørn",
""
],
[
"Ricciardone",
"Angelo",
""
],
[
"Thorsrud",
"Mikjel",
""
]
] | Why is the Universe so homogeneous and isotropic? We summarize a general study of a $\gamma$-law perfect fluid alongside an inhomogeneous, massless scalar gauge field (with homogeneous gradient) in anisotropic spaces with General Relativity. The anisotropic matter sector is implemented as a $j$-form (field-strength lev... |
gr-qc/0201021 | Lior M. Burko | Lior M. Burko | Instability of scalar charges in 1+1D and 2+1D | 4 pages, RevTeX4 | Class.Quant.Grav. 19 (2002) 3745-3752 | 10.1088/0264-9381/19/14/313 | null | gr-qc hep-th | null | We study the phenomenon of mass loss by a scalar charge -- a point particle
which acts as a source for a (non-interacting) scalar field -- in
(1+1)-dimensional and (2+1)-dimensional flat spacetime. We find that such
particles are unstable against self interaction: they lose their mass through
the emission of monopole... | [
{
"created": "Mon, 7 Jan 2002 16:00:01 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Burko",
"Lior M.",
""
]
] | We study the phenomenon of mass loss by a scalar charge -- a point particle which acts as a source for a (non-interacting) scalar field -- in (1+1)-dimensional and (2+1)-dimensional flat spacetime. We find that such particles are unstable against self interaction: they lose their mass through the emission of monopole r... |
2104.09721 | Jasel Berra-Montiel | Jasel Berra-Montiel, Alberto Molgado | Tomography in Loop Quantum Cosmology | 19 pages, no figures | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the tomographic representation for the Friedmann-Robertson-Walker
(FRW) model within the Loop Quantum Cosmology framework. We focus on the Wigner
quasi-probability distributions associated with Gaussian and Schr\"odinger cat
states, and then, by applying a Radon integral transform for those Wigner
function... | [
{
"created": "Tue, 20 Apr 2021 02:31:52 GMT",
"version": "v1"
}
] | 2021-04-21 | [
[
"Berra-Montiel",
"Jasel",
""
],
[
"Molgado",
"Alberto",
""
]
] | We analyze the tomographic representation for the Friedmann-Robertson-Walker (FRW) model within the Loop Quantum Cosmology framework. We focus on the Wigner quasi-probability distributions associated with Gaussian and Schr\"odinger cat states, and then, by applying a Radon integral transform for those Wigner functions,... |
1607.07095 | Sudan Hansraj | Naresh Dadhich, Sudan Hansraj, Brian Chilambwe | Compact objects in pure Lovelock theory | 22 pages 3 figures | null | 10.1142/S0218271817500560 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For static fluid interiors of compact objects in pure Lovelock gravity
(involving ony one $N$th order term in the equation) we establish similarity in
solutions for the critical odd and even $d=2N+1, 2N+2$ dimensions. It turns out
that in critical odd $d=2N+1$ dimensions, there can exist no bound distribution
with a ... | [
{
"created": "Sun, 24 Jul 2016 21:35:44 GMT",
"version": "v1"
},
{
"created": "Mon, 8 May 2017 15:56:07 GMT",
"version": "v2"
}
] | 2017-06-07 | [
[
"Dadhich",
"Naresh",
""
],
[
"Hansraj",
"Sudan",
""
],
[
"Chilambwe",
"Brian",
""
]
] | For static fluid interiors of compact objects in pure Lovelock gravity (involving ony one $N$th order term in the equation) we establish similarity in solutions for the critical odd and even $d=2N+1, 2N+2$ dimensions. It turns out that in critical odd $d=2N+1$ dimensions, there can exist no bound distribution with a fi... |
1707.09128 | Bogeun Gwak | Bogeun Gwak | Stability of Horizon in Warped AdS Black Hole via Particle Absorption | 15 pages | RINP 13, 102155 (2019) | 10.1016/j.rinp.2019.102155 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of the horizon in a warped anti-de Sitter black
hole based on the three-dimensional new massive gravity by particle absorption.
If a particle moving towards the black hole enters its outer horizon, the black
hole changes because it absorbs conserved quantities of the particle. This
variat... | [
{
"created": "Fri, 28 Jul 2017 07:17:22 GMT",
"version": "v1"
}
] | 2019-03-13 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the stability of the horizon in a warped anti-de Sitter black hole based on the three-dimensional new massive gravity by particle absorption. If a particle moving towards the black hole enters its outer horizon, the black hole changes because it absorbs conserved quantities of the particle. This variatio... |
gr-qc/9605061 | Robert van den Hoogen | A A Coley and R J van den Hoogen (Dept. of Math, Stats, and Computing
Science, Dalhousie University) | Qualitative Analysis of Viscous Fluid Cosmological Models satisfying the
Israel-Stewart theory of Irreversible Thermodynamics | 29 pages, 8 Encapsulated PostScript Figures, uses the IOP style files | Class.Quant.Grav.12:1977-1994,1995 | 10.1088/0264-9381/12/8/015 | null | gr-qc | null | Isotropic and spatially homogeneous viscous fluid cosmological models are
investigated using the truncated Israel-Stewart theory of irreversible
thermodynamics to model the bulk viscous pressure. The governing system of
differential equations is written in terms of dimensionless variables and a set
of dimensionless e... | [
{
"created": "Tue, 28 May 1996 14:56:51 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Coley",
"A A",
"",
"Dept. of Math, Stats, and Computing\n Science, Dalhousie University"
],
[
"Hoogen",
"R J van den",
"",
"Dept. of Math, Stats, and Computing\n Science, Dalhousie University"
]
] | Isotropic and spatially homogeneous viscous fluid cosmological models are investigated using the truncated Israel-Stewart theory of irreversible thermodynamics to model the bulk viscous pressure. The governing system of differential equations is written in terms of dimensionless variables and a set of dimensionless equ... |
gr-qc/9806006 | Alex Kaganovich | E.I.Guendelman and A.B.Kaganovich | Gravity, Cosmology and Particle Physics without the Cosmological
Constant Problem | 7 pages, received an "honorable mention" from Gravity Research
Foundation, 1998 | Mod.Phys.Lett. A13 (1998) 1583-1586 | 10.1142/S0217732398001662 | null | gr-qc | null | This essay elucidates recent achievements of the "nongravitating vacuum
energy" (NGVE) theory" which has the feature that a shift of the Lagrangian
density by a constant does not affect dynamics. In the first order formalism, a
constraint appears that enforces the vanishing of the cosmological constant
\Lambda. Stand... | [
{
"created": "Mon, 1 Jun 1998 08:43:10 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Guendelman",
"E. I.",
""
],
[
"Kaganovich",
"A. B.",
""
]
] | This essay elucidates recent achievements of the "nongravitating vacuum energy" (NGVE) theory" which has the feature that a shift of the Lagrangian density by a constant does not affect dynamics. In the first order formalism, a constraint appears that enforces the vanishing of the cosmological constant \Lambda. Standar... |
gr-qc/9210006 | James Hartle | James B. Hartle | The Quantum Mechanics of Closed Systems | 11pages, 4 figures, revtex4, added figures | Directions in Relativity, vol 1, ed by B.-L. Hu, M.P. Ryan, and
C.V. Vishveshwars, Cambridge University Press, Cambridge (1993) | null | null | gr-qc hep-th quant-ph | null | A pedagogical introduction is given to the quantum mechanics of closed
systems, most generally the universe as a whole. Quantum mechanics aims at
predicting the probabilities of alternative coarse-grained time histories of a
closed system. Not every set of alternative coarse-grained histories that can
be described ma... | [
{
"created": "Tue, 13 Oct 1992 00:53:23 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Aug 2004 21:31:22 GMT",
"version": "v2"
}
] | 2014-01-15 | [
[
"Hartle",
"James B.",
""
]
] | A pedagogical introduction is given to the quantum mechanics of closed systems, most generally the universe as a whole. Quantum mechanics aims at predicting the probabilities of alternative coarse-grained time histories of a closed system. Not every set of alternative coarse-grained histories that can be described may ... |
2312.12802 | Dah-Wei Chiou | Bo-Hung Chen and Dah-Wei Chiou | Atomic electron transitions of hydrogen-like atoms induced by
gravitational waves | 19 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As a realistic model of a quantum system of matter, this paper investigates
the gravitational-wave effects on a hydrogen-like atom. By formulating the
tetrad formalism of linearized gravity, we naturally incorporate the
gravitational-wave effects through minimal coupling in the covariant Dirac
equation. The atomic el... | [
{
"created": "Wed, 20 Dec 2023 06:45:54 GMT",
"version": "v1"
}
] | 2023-12-21 | [
[
"Chen",
"Bo-Hung",
""
],
[
"Chiou",
"Dah-Wei",
""
]
] | As a realistic model of a quantum system of matter, this paper investigates the gravitational-wave effects on a hydrogen-like atom. By formulating the tetrad formalism of linearized gravity, we naturally incorporate the gravitational-wave effects through minimal coupling in the covariant Dirac equation. The atomic elec... |
gr-qc/0202038 | Takayuki Tomaru | Takayuki Tomaru, Toshikazu Suzuki, Shinji Miyoki, Takashi Uchiyama,
C.T. Taylor, Akira Yamamoto, Takakazu Shintomi, Masatake Ohashi, Kazuaki
Kuroda | Thermal lensing in cryogenic sapphire substrates | 6 pages, 3 figures, Proceedings of 4th Edoaldo Amaldi Conference of
Gravitational Waves, 8 - 13 July 2001, The University of Western Australia.
Accepted to Classical and Quantum Gravity (Special Issue) | Class.Quant.Grav. 19 (2002) 2045 | 10.1088/0264-9381/19/7/412 | null | gr-qc physics.ins-det | null | We report the reduction of the thermal lensing in cryogenic sapphire mirrors,
which is planed to be used in the Large scale Cryogenic Gravitational wave
Telescope (LCGT) project. We measured three key parameters of sapphire
substrate for thermal lensing at cryogenic temperature. They are optical
absorption coefficien... | [
{
"created": "Tue, 12 Feb 2002 06:17:55 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Tomaru",
"Takayuki",
""
],
[
"Suzuki",
"Toshikazu",
""
],
[
"Miyoki",
"Shinji",
""
],
[
"Uchiyama",
"Takashi",
""
],
[
"Taylor",
"C. T.",
""
],
[
"Yamamoto",
"Akira",
""
],
[
"Shintomi",
"Takakazu",
""
]... | We report the reduction of the thermal lensing in cryogenic sapphire mirrors, which is planed to be used in the Large scale Cryogenic Gravitational wave Telescope (LCGT) project. We measured three key parameters of sapphire substrate for thermal lensing at cryogenic temperature. They are optical absorption coefficient,... |
2402.17498 | Jianbo Lu | Jianbo Lu, Shining Yang, Yan Liu, Yuying Zhang, Yu Liu | Validity of energy conditions of matter in traversable wormholes under
the $f(Q)$ modified gravity theory | 18 pages, 5 figures | Eur. Phys. J. Plus (2024) 139:274 | 10.1140/epjp/s13360-024-05093-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the theory of general relativity, in order to obtain
stable traversable wormholes, matter needs to violate the null energy
condition. It is well known that the violation of the energy condition (EC) of
matter leads to various physical problems. To address this issue, researchers
have turned their ... | [
{
"created": "Tue, 27 Feb 2024 13:27:15 GMT",
"version": "v1"
}
] | 2024-03-22 | [
[
"Lu",
"Jianbo",
""
],
[
"Yang",
"Shining",
""
],
[
"Liu",
"Yan",
""
],
[
"Zhang",
"Yuying",
""
],
[
"Liu",
"Yu",
""
]
] | In the framework of the theory of general relativity, in order to obtain stable traversable wormholes, matter needs to violate the null energy condition. It is well known that the violation of the energy condition (EC) of matter leads to various physical problems. To address this issue, researchers have turned their at... |
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