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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2306.03662 | Pedro Fernandes | Clare Burrage, Pedro G. S. Fernandes, Richard Brito, Vitor Cardoso | Spinning Black Holes with Axion Hair | 17 pages, 10 figures | Class.Quant.Grav. 40 (2023) 20, 205021 | 10.1088/1361-6382/acf9d6 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we construct and analyse non-perturbative stationary and
axially-symmetric black hole solutions in General Relativity coupled to an
electromagnetic and an axion field. The axion field is coupled to the
electromagnetic field, which leads to hairy solutions in the presence of an
electric charge and rotatio... | [
{
"created": "Tue, 6 Jun 2023 13:25:49 GMT",
"version": "v1"
}
] | 2024-02-14 | [
[
"Burrage",
"Clare",
""
],
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
]
] | In this work we construct and analyse non-perturbative stationary and axially-symmetric black hole solutions in General Relativity coupled to an electromagnetic and an axion field. The axion field is coupled to the electromagnetic field, which leads to hairy solutions in the presence of an electric charge and rotation.... |
1307.2106 | Cosimo Bambi | Cosimo Bambi, Daniele Malafarina | K$\alpha$ iron line profile from accretion disks around regular and
singular exotic compact objects | 9 pages, 6 figures. v2: minor changes | Phys.Rev.D88:064022,2013 | 10.1103/PhysRevD.88.064022 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nature of the super-massive black hole candidates in galactic nuclei can
be tested by analyzing the profile of the K$\alpha$ iron line observed in their
X-ray spectrum. In this paper, we consider the possibility that the spacetime
in the immediate vicinity of these objects may be described by some non vacuum
exac... | [
{
"created": "Mon, 8 Jul 2013 14:19:47 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Sep 2013 22:12:45 GMT",
"version": "v2"
}
] | 2013-09-12 | [
[
"Bambi",
"Cosimo",
""
],
[
"Malafarina",
"Daniele",
""
]
] | The nature of the super-massive black hole candidates in galactic nuclei can be tested by analyzing the profile of the K$\alpha$ iron line observed in their X-ray spectrum. In this paper, we consider the possibility that the spacetime in the immediate vicinity of these objects may be described by some non vacuum exact ... |
gr-qc/9703026 | Lee Smolin | Stuart Kauffman and Lee Smolin | A possible solution to the problem of time in quantum cosmology | Latex, 15 pages, no figures | null | null | CGPG-97/3-3 | gr-qc | null | We argue that in classical and quantum theories of gravity the configuration
space and Hilbert space may not be constructible through any finite procedure.
If this is the case then the "problem of time" in quantum cosmology may be a
pseudo-problem, because the argument that time disappears from the theory
depends on ... | [
{
"created": "Sun, 9 Mar 1997 13:44:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kauffman",
"Stuart",
""
],
[
"Smolin",
"Lee",
""
]
] | We argue that in classical and quantum theories of gravity the configuration space and Hilbert space may not be constructible through any finite procedure. If this is the case then the "problem of time" in quantum cosmology may be a pseudo-problem, because the argument that time disappears from the theory depends on co... |
1407.7341 | Yasumichi Sano | Yasumichi Sano and Hideyuki Tagoshi | Gravitational field of a Schwarzschild black hole and a rotating mass
ring | 15pages, 9 figures, Accepted by Physical Review D | null | 10.1103/PhysRevD.90.044043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The linear perturbation of the Kerr black hole has been discussed by using
the Newman--Penrose and the perturbed Weyl scalars, $\psi_0$ and $\psi_4$ can
be obtained from the Teukolsky equation. In order to obtain the other Weyl
scalars and the perturbed metric, a formalism was proposed by Chrzanowski and
by Cohen and... | [
{
"created": "Mon, 28 Jul 2014 07:17:17 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Sano",
"Yasumichi",
""
],
[
"Tagoshi",
"Hideyuki",
""
]
] | The linear perturbation of the Kerr black hole has been discussed by using the Newman--Penrose and the perturbed Weyl scalars, $\psi_0$ and $\psi_4$ can be obtained from the Teukolsky equation. In order to obtain the other Weyl scalars and the perturbed metric, a formalism was proposed by Chrzanowski and by Cohen and K... |
1210.4002 | Jiang Qing-Quan | Qing-Quan Jiang, Yan Han | On black hole spectroscopy via adiabatic invariance | 13 pages, some references added, to be published in Phys. Lett. B | Phys.Lett. B718 (2012) 584-588 | 10.1016/j.physletb.2012.10.031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we obtain the black hole spectroscopy by combining the black
hole property of adiabaticity and the oscillating velocity of the black hole
horizon. This velocity is obtained in the tunneling framework. In particular,
we declare, if requiring canonical invariance, the adiabatic invariant quantity
should ... | [
{
"created": "Mon, 15 Oct 2012 12:39:17 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Oct 2012 13:17:31 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Jiang",
"Qing-Quan",
""
],
[
"Han",
"Yan",
""
]
] | In this paper, we obtain the black hole spectroscopy by combining the black hole property of adiabaticity and the oscillating velocity of the black hole horizon. This velocity is obtained in the tunneling framework. In particular, we declare, if requiring canonical invariance, the adiabatic invariant quantity should be... |
2207.02915 | Fabian L\'aszl\'o Konstantin Wagner | Fabian Wagner | Curved momentum space equivalent to the linear and quadratic Generalized
Uncertainty Principle | Presented at the Ninth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, May 17-26, 2022 | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we deepen the correspondence between Generalized Uncertainty
Principles (GUPs) and quantum dynamics on curved momentum space. In particular,
we investigate the linear and quadratic GUP. Similarly to earlier work, the
resulting curvature tensor in the dual theory is proportional to the coordinate
non-com... | [
{
"created": "Tue, 5 Jul 2022 13:06:24 GMT",
"version": "v1"
}
] | 2022-07-08 | [
[
"Wagner",
"Fabian",
""
]
] | In this work, we deepen the correspondence between Generalized Uncertainty Principles (GUPs) and quantum dynamics on curved momentum space. In particular, we investigate the linear and quadratic GUP. Similarly to earlier work, the resulting curvature tensor in the dual theory is proportional to the coordinate non-commu... |
1611.00441 | Julian Rennert | Julian Rennert | Timelike twisted geometries | v2: Added some clarifications in Sec. V E. Published version | Phys. Rev. D 95, 026002 (2017) | 10.1103/PhysRevD.95.026002 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the twistorial parametrization of Loop Quantum Gravity we investigate
the consequences of choosing a spacelike normal vector in the linear simplicity
constraints. The amplitudes for the $SU(2)$ boundary states of Loop Quantum
Gravity, given by most of the current spinfoam models, are constructed in such
a way ... | [
{
"created": "Wed, 2 Nov 2016 01:47:08 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jan 2017 20:23:02 GMT",
"version": "v2"
}
] | 2017-01-13 | [
[
"Rennert",
"Julian",
""
]
] | Within the twistorial parametrization of Loop Quantum Gravity we investigate the consequences of choosing a spacelike normal vector in the linear simplicity constraints. The amplitudes for the $SU(2)$ boundary states of Loop Quantum Gravity, given by most of the current spinfoam models, are constructed in such a way th... |
1602.01319 | Claus Kiefer | Alexander Kamenshchik, Claus Kiefer, Nick Kwidzinski | Classical and quantum cosmology of Born-Infeld type models | 14 pages, 8 figures, published version | Phys. Rev. D 93, 083519 (2016) | 10.1103/PhysRevD.93.083519 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss Born-Infeld type fields (tachyon fields) in classical and quantum
cosmology. We first partly review and partly extend the discussion of the
classical solutions and focus in particular on the occurrence of singularities.
For quantization, we employ geometrodynamics. In the case of constant
potential, we dis... | [
{
"created": "Wed, 3 Feb 2016 14:43:47 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Apr 2016 09:06:02 GMT",
"version": "v2"
}
] | 2016-05-04 | [
[
"Kamenshchik",
"Alexander",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Kwidzinski",
"Nick",
""
]
] | We discuss Born-Infeld type fields (tachyon fields) in classical and quantum cosmology. We first partly review and partly extend the discussion of the classical solutions and focus in particular on the occurrence of singularities. For quantization, we employ geometrodynamics. In the case of constant potential, we discu... |
gr-qc/0604123 | Carlos Peralta | C. Peralta (1,2), A. Melatos (1), M. Giacobello (3) and A. Ooi (3) | Gravitational radiation from nonaxisymmetric spherical Couette flow in a
neutron star | (1) School of Physics, University of Melbourne, Parkville, VIC 3010,
Australia. (2) Departamento de Fisica, Escuela de Ciencias,Universidad de
Oriente, Cumana, Venezuela, (3) Department of Mechanical Engineering,
University of Melbourne, Parkville, VIC 3010, Australia. Accepted for
publication in The Astrophysi... | Astrophys.J.644:L53-L56,2006 | 10.1086/505422 | null | gr-qc astro-ph | null | The gravitational wave signal generated by global, nonaxisymmetric shear
flows in a neutron star is calculated numerically by integrating the
incompressible Navier--Stokes equation in a spherical, differentially rotating
shell. At Reynolds numbers $\Rey \gsim 3 \times 10^{3}$, the laminar Stokes
flow is unstable and ... | [
{
"created": "Fri, 28 Apr 2006 08:48:57 GMT",
"version": "v1"
}
] | 2011-05-23 | [
[
"Peralta",
"C.",
""
],
[
"Melatos",
"A.",
""
],
[
"Giacobello",
"M.",
""
],
[
"Ooi",
"A.",
""
]
] | The gravitational wave signal generated by global, nonaxisymmetric shear flows in a neutron star is calculated numerically by integrating the incompressible Navier--Stokes equation in a spherical, differentially rotating shell. At Reynolds numbers $\Rey \gsim 3 \times 10^{3}$, the laminar Stokes flow is unstable and he... |
1807.01621 | Ayesha Zakria | Ayesha Zakria, Qurat-ul-Ain Satti | Black Holes and White Holes as Particle Accelerators | 13 pages, 13 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate particle collisions in non-extremal black hole that can
probably induced to extremely high center of mass energy $E_{\text{cm}}$. We
consider the collision of two particles where first particle comes from far to
the outer horizon of the Reissner-Nordstr\"{o}m black hole and second particle
emanates fro... | [
{
"created": "Wed, 4 Jul 2018 14:49:07 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Aug 2018 13:00:31 GMT",
"version": "v2"
}
] | 2018-08-22 | [
[
"Zakria",
"Ayesha",
""
],
[
"Satti",
"Qurat-ul-Ain",
""
]
] | We investigate particle collisions in non-extremal black hole that can probably induced to extremely high center of mass energy $E_{\text{cm}}$. We consider the collision of two particles where first particle comes from far to the outer horizon of the Reissner-Nordstr\"{o}m black hole and second particle emanates from ... |
2209.06835 | Oleg Evnin | Anxo Biasi, Oleg Evnin, Spyros Sypsas | De Sitter bubbles from anti-de Sitter fluctuations | v3: minor improvements, accepted for publication in Phys.Rev.Lett | Phys. Rev. Lett. 129 (2022) 251104 (editors' suggestion) | 10.1103/PhysRevLett.129.251104 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological acceleration is difficult to accommodate in theories of
fundamental interactions involving supergravity and superstrings. An
alternative is that the acceleration is not universal but happens in a large
localized region, which is possible in theories admitting regular black holes
with de Sitter-like inter... | [
{
"created": "Wed, 14 Sep 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2022 11:11:07 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Nov 2022 08:13:41 GMT",
"version": "v3"
}
] | 2022-12-20 | [
[
"Biasi",
"Anxo",
""
],
[
"Evnin",
"Oleg",
""
],
[
"Sypsas",
"Spyros",
""
]
] | Cosmological acceleration is difficult to accommodate in theories of fundamental interactions involving supergravity and superstrings. An alternative is that the acceleration is not universal but happens in a large localized region, which is possible in theories admitting regular black holes with de Sitter-like interio... |
1703.09853 | Wen Zhao | Xing Zhang, Jiming Yu, Tan Liu, Wen Zhao, Anzhong Wang | Testing Brans-Dicke gravity using the Einstein telescope | 26 pages, 10 figures, 1 table, new references added, Phys.Rev.D
accepted | Phys. Rev. D 95, 124008 (2017) | 10.1103/PhysRevD.95.124008 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational radiation is an excellent field for testing theories of gravity
in strong gravitational fields. The current observations on the
gravitational-wave (GW) bursts by LIGO have already placed various constraints
on the alternative theories of gravity. In this paper, we investigate the
possible bounds which c... | [
{
"created": "Wed, 29 Mar 2017 01:13:26 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2017 03:09:02 GMT",
"version": "v2"
},
{
"created": "Fri, 26 May 2017 09:51:48 GMT",
"version": "v3"
}
] | 2017-06-14 | [
[
"Zhang",
"Xing",
""
],
[
"Yu",
"Jiming",
""
],
[
"Liu",
"Tan",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | Gravitational radiation is an excellent field for testing theories of gravity in strong gravitational fields. The current observations on the gravitational-wave (GW) bursts by LIGO have already placed various constraints on the alternative theories of gravity. In this paper, we investigate the possible bounds which cou... |
2310.01560 | Saulo Carneiro | H. A. Borges, I. P. R. Baranov, F. C. Sobrinho and S. Carneiro | Remnant loop quantum black holes | Version to appear in the letter section of Class. Quantum Grav | Class. Quantum Grav. 41 (2024) 05LT01 | 10.1088/1361-6382/ad210c | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Polymer models inspired by Loop Quantum Gravity (LQG) have been used to
describe non-singular quantum black holes with spherical symmetry, with the
classical singularity replaced by a transition from a black hole to a white
hole. A recent model, with a single polymerisation parameter, leads to a
symmetric transition ... | [
{
"created": "Mon, 2 Oct 2023 18:53:01 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Oct 2023 00:22:28 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Jan 2024 14:51:40 GMT",
"version": "v3"
}
] | 2024-02-01 | [
[
"Borges",
"H. A.",
""
],
[
"Baranov",
"I. P. R.",
""
],
[
"Sobrinho",
"F. C.",
""
],
[
"Carneiro",
"S.",
""
]
] | Polymer models inspired by Loop Quantum Gravity (LQG) have been used to describe non-singular quantum black holes with spherical symmetry, with the classical singularity replaced by a transition from a black hole to a white hole. A recent model, with a single polymerisation parameter, leads to a symmetric transition wi... |
2201.08948 | Quinn Taylor | Quinn Taylor, Glenn Starkman | How the Universe postpones the evaporation and curtails the quantum
spreading of black holes | 4 pages | null | 10.1103/PhysRevD.105.043526 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Black holes are expected to evaporate through the process of Hawking
radiation. This process is expected to cause the uncertainty in a black hole's
position to grow to $\sim M^2/M_{Pl}^3$ over the course of it's lifetime, even
as its momentum spreads only by $\sim M_{Pl}$. For the black holes that have
been observed,... | [
{
"created": "Sat, 22 Jan 2022 02:29:39 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Sep 2022 14:34:18 GMT",
"version": "v2"
}
] | 2022-09-29 | [
[
"Taylor",
"Quinn",
""
],
[
"Starkman",
"Glenn",
""
]
] | Black holes are expected to evaporate through the process of Hawking radiation. This process is expected to cause the uncertainty in a black hole's position to grow to $\sim M^2/M_{Pl}^3$ over the course of it's lifetime, even as its momentum spreads only by $\sim M_{Pl}$. For the black holes that have been observed, w... |
2112.12599 | Fulvio Melia | Fulvio Melia | A Measurement of the Cosmic Expansion Within our Lifetime | 15 pages, 4 figures. Accepted for publication in EJP | 2022 Eur. J. Phys. 43 035601 | 10.1088/1361-6404/ac4646 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | The most exciting future observation in cosmology will feature a monitoring
of the cosmic expansion in real time, unlike anything that has ever been
attempted before. This campaign will uncover crucial physical properties of the
various constituents in the Universe, and perhaps answer a simpler question
concerning wh... | [
{
"created": "Wed, 22 Dec 2021 15:32:30 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Melia",
"Fulvio",
""
]
] | The most exciting future observation in cosmology will feature a monitoring of the cosmic expansion in real time, unlike anything that has ever been attempted before. This campaign will uncover crucial physical properties of the various constituents in the Universe, and perhaps answer a simpler question concerning whet... |
1409.4024 | Oleg Zaslavskii | O. B. Zaslavskii | Ultrahigh energy particle collisions near many-dimensional black holes:
general approach | 6 pages. Inaccuracies corrected, discussion slightly expanded. To
appear in PRD | Phys. Rev. D 90, 107503 (2014) | 10.1103/PhysRevD.90.107503 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If two particles moving towards a black hole collide near the horizon, their
energy in the centre of mass frame can grow unbounded. This is the so-called
Banados - Silk - West (BSW) effect. Earlier, it was shown that in the 3+1
space-time this effect has a universal nature. We show that for a wide class of
many-dimen... | [
{
"created": "Sun, 14 Sep 2014 07:46:13 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Nov 2014 20:24:13 GMT",
"version": "v2"
}
] | 2014-12-01 | [
[
"Zaslavskii",
"O. B.",
""
]
] | If two particles moving towards a black hole collide near the horizon, their energy in the centre of mass frame can grow unbounded. This is the so-called Banados - Silk - West (BSW) effect. Earlier, it was shown that in the 3+1 space-time this effect has a universal nature. We show that for a wide class of many-dimensi... |
gr-qc/9611015 | Mahmut Hortacsu | M. Hortacsu and N. Ozdemir | An Extension of Multiple Cosmic String Solution: A Proposal | 8 pages, latex | null | null | MRC-PH.TH-13/96 | gr-qc | null | We extend the work done for cosmic strings and show that for a more general
class of locally flat metrics the one loop calculation do not introduce any new
divergences to the VEV of the energy of a scalar particle. We explicitly
perform the calculation for the configuration where we have one cosmic string
in the pres... | [
{
"created": "Wed, 6 Nov 1996 13:49:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hortacsu",
"M.",
""
],
[
"Ozdemir",
"N.",
""
]
] | We extend the work done for cosmic strings and show that for a more general class of locally flat metrics the one loop calculation do not introduce any new divergences to the VEV of the energy of a scalar particle. We explicitly perform the calculation for the configuration where we have one cosmic string in the presen... |
gr-qc/9411017 | Jorma Louko | Jorma Louko and Bernard F. Whiting | Hamiltonian thermodynamics of the Schwarzschild black hole | 31 pages, REVTeX v3.0. (Minor presentational revisions; 10 added
references.) | Phys.Rev.D51:5583-5599,1995 | 10.1103/PhysRevD.51.5583 | UF-RAP-94-13, WISC-MILW-94-TH-24 | gr-qc hep-th | null | Kucha\v{r} has recently given a detailed analysis of the classical and
quantum geometrodynamics of the Kruskal extension of the Schwarzschild black
hole. In this paper we adapt Kucha\v{r}'s analysis to the exterior region of a
Schwarzschild black hole with a timelike boundary. The reduced Lorentzian
Hamiltonian is sh... | [
{
"created": "Tue, 8 Nov 1994 02:17:46 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 1995 21:41:30 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Louko",
"Jorma",
""
],
[
"Whiting",
"Bernard F.",
""
]
] | Kucha\v{r} has recently given a detailed analysis of the classical and quantum geometrodynamics of the Kruskal extension of the Schwarzschild black hole. In this paper we adapt Kucha\v{r}'s analysis to the exterior region of a Schwarzschild black hole with a timelike boundary. The reduced Lorentzian Hamiltonian is show... |
gr-qc/0201023 | Luis Herrera | L. Herrera and A. Di Prisco | The Thomas precession and the transformation to rotating frames | 12 pages Latex, 2 PS figures, to appear in Found.Phys. (Lett) | Found.Phys.Lett. 15 (2002) 373-383 | null | null | gr-qc math-ph math.MP quant-ph | null | The Thomas precession is calculated using three different transformations to
the rotating frame. It is shown that for sufficiently large values of $v/c$,
important differences in the predicted angle of precession appear, depending on
the transformation used. For smaller values of $v/c$ these differences might be
meas... | [
{
"created": "Mon, 7 Jan 2002 21:17:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
]
] | The Thomas precession is calculated using three different transformations to the rotating frame. It is shown that for sufficiently large values of $v/c$, important differences in the predicted angle of precession appear, depending on the transformation used. For smaller values of $v/c$ these differences might be measur... |
gr-qc/9802010 | Domenico Giulini | Domenico Giulini | Is There a General Area Theorem for Black Holes? | 7 pages, TeX; the proof for existence of cusps is generalized, new
material and references included | J.Math.Phys. 39 (1998) 6603-6606 | 10.1063/1.532668 | ZU-TH 13/98 | gr-qc | null | The general validity of the area law for black holes is still an open
problem. We first show in detail how to complete the usually incompletely
stated text-book proofs under the assumption of piecewise $C^2$-smoothness for
the surface of the black hole. Then we prove that a black hole surface
necessarily contains poi... | [
{
"created": "Tue, 3 Feb 1998 17:50:20 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 1998 12:12:49 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Giulini",
"Domenico",
""
]
] | The general validity of the area law for black holes is still an open problem. We first show in detail how to complete the usually incompletely stated text-book proofs under the assumption of piecewise $C^2$-smoothness for the surface of the black hole. Then we prove that a black hole surface necessarily contains point... |
1808.09958 | Zhongwen Feng | Zhong-Wen Feng and Shu-Zheng Yang | Rainbow gravity corrections to the information flux of a black hole and
the sparsity of Hawking radiation | 8 pages, 4 figures, added references, corrected typos | Annals of Physics 2020, 416: 168144 | 10.1016/j.aop.2020.168144 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, by utilizing the rainbow functions that were proposed by
Amelino-Camelia \emph{et al}., the information flux of rainbow Schwarzschild
black hole and the sparsity of Hawking radiation in rainbow gravity are
explored. The results show that the rainbow gravity has a very significant
effect on the informat... | [
{
"created": "Wed, 29 Aug 2018 11:25:49 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Sep 2018 08:28:27 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Dec 2019 13:42:12 GMT",
"version": "v3"
}
] | 2020-04-01 | [
[
"Feng",
"Zhong-Wen",
""
],
[
"Yang",
"Shu-Zheng",
""
]
] | In this paper, by utilizing the rainbow functions that were proposed by Amelino-Camelia \emph{et al}., the information flux of rainbow Schwarzschild black hole and the sparsity of Hawking radiation in rainbow gravity are explored. The results show that the rainbow gravity has a very significant effect on the informatio... |
1401.1375 | Luca Lusanna | L.Lusanna and M.Villani | Hamiltonian Expression of Curvature Tensors in the York Canonical Basis:
II) The Weyl Tensor, Weyl Scalars, the Weyl Eigenvalues and the Problem of
the Observables of the Gravitational Field | 29 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find the Hamiltonian expression in the York basis of canonical ADM tetrad
gravity of the 4-Weyl tensor of the asymptotically Minkowskian space-time. Like
for the 4-Riemann tensor we find a radar tensor (whose components are 4-scalars
due to the use of radar 4-coordinates), which coincides with the 4-Weyl tensor
on... | [
{
"created": "Tue, 7 Jan 2014 13:44:26 GMT",
"version": "v1"
}
] | 2014-01-08 | [
[
"Lusanna",
"L.",
""
],
[
"Villani",
"M.",
""
]
] | We find the Hamiltonian expression in the York basis of canonical ADM tetrad gravity of the 4-Weyl tensor of the asymptotically Minkowskian space-time. Like for the 4-Riemann tensor we find a radar tensor (whose components are 4-scalars due to the use of radar 4-coordinates), which coincides with the 4-Weyl tensor on-s... |
0902.3144 | Luca Izzo | L. Izzo, S. Capozziello, M. De Laurentis | Detecting the Cosmological Stochastic Background of Gravitational Waves
with FastICA | 5 pages, 1 figure, to appear in Proceeding of the 3rd Stueckelberg
Workshop, July 2008 - Pescara, Italy | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the stochastic background of gravitational waves, produced in
the early cosmological epochs, strictly depends on the assumed theory of
gravity. In particular, the specific form of the function f(R), where R is the
Ricci scalar, is related to the evolution and the production mechanism of
gravitational wav... | [
{
"created": "Wed, 18 Feb 2009 13:55:26 GMT",
"version": "v1"
}
] | 2009-02-19 | [
[
"Izzo",
"L.",
""
],
[
"Capozziello",
"S.",
""
],
[
"De Laurentis",
"M.",
""
]
] | We show that the stochastic background of gravitational waves, produced in the early cosmological epochs, strictly depends on the assumed theory of gravity. In particular, the specific form of the function f(R), where R is the Ricci scalar, is related to the evolution and the production mechanism of gravitational waves... |
gr-qc/0502027 | Mauricio Bellini | Alfredo Raya Montano (IFM, UMISNH), Jose Edgar Madriz Aguilar (Paraiba
University), Mauricio Bellini (Mar del Plata University & CONICET) | Expansion of the universe from a 5D vacuum within a nonperturbative
scalar field formalism | version to be published in Advanced Studies in Theoretical Physics | Adv.Stud.Theor.Phys.1:281,2007 | null | null | gr-qc astro-ph hep-ph hep-th | null | We study the dynamics of the quantum scalar field responsible for inflation
in different epochs of the evolution of the universe by using a recently
introduced nonperturbative formalism from a 5D apparent vacuum.
| [
{
"created": "Mon, 7 Feb 2005 17:44:44 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2005 17:53:54 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Apr 2005 22:11:25 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Jun 2005 21:56:27 GMT",
"version": "v4"
},
{
"cr... | 2008-11-26 | [
[
"Montano",
"Alfredo Raya",
"",
"IFM, UMISNH"
],
[
"Aguilar",
"Jose Edgar Madriz",
"",
"Paraiba\n University"
],
[
"Bellini",
"Mauricio",
"",
"Mar del Plata University & CONICET"
]
] | We study the dynamics of the quantum scalar field responsible for inflation in different epochs of the evolution of the universe by using a recently introduced nonperturbative formalism from a 5D apparent vacuum. |
gr-qc/0409018 | Francisco Lobo | Francisco S. N. Lobo | Surface stresses on a thin shell surrounding a traversable wormhole | 24 pages, 11 figures, LaTeX2e, IOP style files. Accepted for
publication in Classical and Quantum Gravity. V2: Four references added, now
25 pages | Class.Quant.Grav. 21 (2004) 4811-4832 | 10.1088/0264-9381/21/21/005 | null | gr-qc astro-ph hep-th | null | We match an interior solution of a spherically symmetric traversable wormhole
to a unique exterior vacuum solution, with a generic cosmological constant, at
a junction interface, and the surface stresses on the thin shell are deduced.
In the spirit of minimizing the usage of exotic matter we determine regions in
whic... | [
{
"created": "Sat, 4 Sep 2004 11:32:18 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Sep 2004 17:30:56 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Lobo",
"Francisco S. N.",
""
]
] | We match an interior solution of a spherically symmetric traversable wormhole to a unique exterior vacuum solution, with a generic cosmological constant, at a junction interface, and the surface stresses on the thin shell are deduced. In the spirit of minimizing the usage of exotic matter we determine regions in which ... |
gr-qc/0103108 | Hrvoje Nikolic | H. Nikolic | Inappropriateness of the Rindler quantization | 3 pages, accepted for publication in Mod. Phys. Lett. A | Mod.Phys.Lett.A16:579-581,2001; Mod.Phys.Lett.A16:579-602,2001 | 10.1142/S0217732301003681 | null | gr-qc hep-th | null | It is argued that the Rindler quantization is not a correct approach to study
the effects of acceleration on quantum fields. First, the "particle"-detector
approach based on the Minkowski quantization is not equivalent to the approach
based on the Rindler quantization. Second, the event horizon, which plays the
essen... | [
{
"created": "Thu, 29 Mar 2001 10:17:45 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Nikolic",
"H.",
""
]
] | It is argued that the Rindler quantization is not a correct approach to study the effects of acceleration on quantum fields. First, the "particle"-detector approach based on the Minkowski quantization is not equivalent to the approach based on the Rindler quantization. Second, the event horizon, which plays the essenti... |
1705.04397 | Estelle Asmodelle Ms | Estelle Asmodelle | Tests of General Relativity: A Review | 65 pages, 23 Figures, B.Sc. [hons] dissertation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This report is a literature review of significant and successful tests of
general relativity [GR]. The GR predicted value for the perihelion advance of
Mercury was Deltaf = 43.03 arcsec century^-1 and fit well with observation,
being the first success of GR. The GR result for the bending of light around
the Sun dGR =... | [
{
"created": "Thu, 11 May 2017 23:27:13 GMT",
"version": "v1"
}
] | 2017-05-15 | [
[
"Asmodelle",
"Estelle",
""
]
] | This report is a literature review of significant and successful tests of general relativity [GR]. The GR predicted value for the perihelion advance of Mercury was Deltaf = 43.03 arcsec century^-1 and fit well with observation, being the first success of GR. The GR result for the bending of light around the Sun dGR = 1... |
gr-qc/0411116 | Andreas Freise | A. Freise (for the VIRGO Collaboration) | Automatic Mirror Alignment for VIRGO: First experimental demonstration
of the Anderson technique on a large-scale interferometer | 6 pages and 4 figures, submitted to TNS (in connection with the IEEE
conference Rome 2004) | null | null | null | gr-qc | null | The French-Italian interferometric gravitational wave detector VIRGO is
currently being commissioned. Its principal instrument is a Michelson laser
interferometer with 3 km long optical cavities in the arms and a
power-recycling mirror. The interferometer resides in an ultra-high vacuum
system and the mirrors are sus... | [
{
"created": "Wed, 24 Nov 2004 23:07:11 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"Freise",
"A.",
"",
"for the VIRGO Collaboration"
]
] | The French-Italian interferometric gravitational wave detector VIRGO is currently being commissioned. Its principal instrument is a Michelson laser interferometer with 3 km long optical cavities in the arms and a power-recycling mirror. The interferometer resides in an ultra-high vacuum system and the mirrors are suspe... |
1801.09694 | Oscar J. C. Dias | Oscar J.C. Dias, Felicity C. Eperon, Harvey S. Reall and Jorge E.
Santos | Strong cosmic censorship in de Sitter space | 26 pages, 6 figures | Phys. Rev. D 97, 104060 (2018) | 10.1103/PhysRevD.97.104060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work indicates that the strong cosmic censorship hypothesis is
violated by nearly extremal Reissner-Nordstrom-de Sitter black holes. It was
argued that perturbations of such a black hole decay sufficiently rapidly that
the perturbed spacetime can be extended across the Cauchy horizon as a weak
solution of the ... | [
{
"created": "Mon, 29 Jan 2018 19:00:04 GMT",
"version": "v1"
}
] | 2018-06-06 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Eperon",
"Felicity C.",
""
],
[
"Reall",
"Harvey S.",
""
],
[
"Santos",
"Jorge E.",
""
]
] | Recent work indicates that the strong cosmic censorship hypothesis is violated by nearly extremal Reissner-Nordstrom-de Sitter black holes. It was argued that perturbations of such a black hole decay sufficiently rapidly that the perturbed spacetime can be extended across the Cauchy horizon as a weak solution of the eq... |
2303.00665 | Mouhssine Koussour | M. Koussour | A model-independent method with phantom divide line crossing in
Weyl-type $f(Q,T)$ gravity | Submitted to CJPHY | Chinese Journal of Physics (2023) | 10.1016/j.cjph.2023.04.003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the history of the cosmos using an extension of symmetric
teleparallel gravity, namely Weyl-type $f(Q,T)$ gravity, where $Q$ represents
the non-metricity scalar of space-time in the standard Weyl form, completely
specified by the Weyl vector $w_{\mu }$, and $T$ represents the trace of the
matter energy... | [
{
"created": "Wed, 1 Mar 2023 17:02:12 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Koussour",
"M.",
""
]
] | We investigate the history of the cosmos using an extension of symmetric teleparallel gravity, namely Weyl-type $f(Q,T)$ gravity, where $Q$ represents the non-metricity scalar of space-time in the standard Weyl form, completely specified by the Weyl vector $w_{\mu }$, and $T$ represents the trace of the matter energy-m... |
gr-qc/0105089 | Marco Scandurra | M. Scandurra (Pisa U.) | Some remarks on black hole temperature and the second law of
thermodynamics | 3 pages; part of a talk given at EFI, at the University of Chicago;
misprint corrected | null | null | null | gr-qc | null | I present a formulation of the second law of thermodynamics in the presence
of black holes which makes use of the efficiency of an ideal machine extracting
heat cyclically from a black hole. The Carnot coefficient is found and it is
shown to be a simple function of the mass.
| [
{
"created": "Thu, 24 May 2001 20:38:26 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2001 13:41:22 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Scandurra",
"M.",
"",
"Pisa U."
]
] | I present a formulation of the second law of thermodynamics in the presence of black holes which makes use of the efficiency of an ideal machine extracting heat cyclically from a black hole. The Carnot coefficient is found and it is shown to be a simple function of the mass. |
1904.02854 | Florian Beyer | Ellery Ames, Florian Beyer, James Isenberg | Contracting asymptotics of the linearized lapse-scalar field sub-system
of the Einstein-scalar field equations | 58 pages. Fixed several further typos. Further clarifications of the
results. Results unchanged. Agrees with published version | J. Math. Phys. 60, 102504 (2019) | 10.1063/1.5115104 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove an asymptotic stability result for a linear coupled
hyperbolic-elliptic system on a large class of singular background spacetimes
in CMC gauge on the n-torus. At each spatial point these background spacetimes
are perturbations of Kasner-like solutions of the Einstein-scalar field
equations which are not requ... | [
{
"created": "Fri, 5 Apr 2019 03:01:16 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 03:23:31 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Oct 2019 08:38:05 GMT",
"version": "v3"
}
] | 2019-10-21 | [
[
"Ames",
"Ellery",
""
],
[
"Beyer",
"Florian",
""
],
[
"Isenberg",
"James",
""
]
] | We prove an asymptotic stability result for a linear coupled hyperbolic-elliptic system on a large class of singular background spacetimes in CMC gauge on the n-torus. At each spatial point these background spacetimes are perturbations of Kasner-like solutions of the Einstein-scalar field equations which are not requir... |
gr-qc/0111002 | Haret Rosu | H.C. Rosu | Korteweg-de Vries adiabatic index solitons in barotropic open FRW
cosmologies | 5 pages, without figures | Mod.Phys.Lett. A17 (2002) 667-670 | 10.1142/S0217732302006898 | null | gr-qc | null | Applying standard mathematical methods, it is explicitly shown how the
Riccati equation for the Hubble parameter H(\eta) of barotropic open FRW
cosmologies is connected with a Korteweg-de Vries equation for adiabatic index
solitons. It is also shown how one can embed a discrete sequence of adiabatic
indices of the ty... | [
{
"created": "Thu, 1 Nov 2001 19:41:15 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rosu",
"H. C.",
""
]
] | Applying standard mathematical methods, it is explicitly shown how the Riccati equation for the Hubble parameter H(\eta) of barotropic open FRW cosmologies is connected with a Korteweg-de Vries equation for adiabatic index solitons. It is also shown how one can embed a discrete sequence of adiabatic indices of the type... |
gr-qc/9602033 | Thorsten Brotz | T. Brotz and C. Kiefer | Ehrenfest's Principle and the Problem of Time in Quantum Gravity | 20 pages, LATEX | Nucl.Phys. B475 (1996) 339-360 | 10.1016/0550-3213(96)00304-5 | Freiburg THEP-96/1 | gr-qc | null | We elaborate on a proposal made by Greensite and others to solve the problem
of time in quantum gravity. The proposal states that a viable concept of time
and a sensible inner product can be found from the demand for the Ehrenfest
equations to hold in quantum gravity. We derive and discuss in detail exact
consistency... | [
{
"created": "Thu, 15 Feb 1996 09:50:26 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Brotz",
"T.",
""
],
[
"Kiefer",
"C.",
""
]
] | We elaborate on a proposal made by Greensite and others to solve the problem of time in quantum gravity. The proposal states that a viable concept of time and a sensible inner product can be found from the demand for the Ehrenfest equations to hold in quantum gravity. We derive and discuss in detail exact consistency c... |
1405.5388 | Izzet Sakalli | I. Sakalli and S.F. Mirekhtiary | Spectroscopy of Rindler Modified Schwarzschild Black Hole | arXiv admin note: substantial text overlap with arXiv:1307.0340 | Astrophys. Space Sci. 350 (2), 727-731 (2014) | 10.1007/s10509-013-1776-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quasinormal modes (QNMs) of uncharged Grumiller black hole (GBH).
This massive BH has a Rindler acceleration $a$, and hence it is also called
Rindler modified Schwarzschild BH. After reducing the radial equation of the
massless Klein-Gordon equation to the Zerilli equation, we compute the complex
frequencies... | [
{
"created": "Wed, 21 May 2014 11:58:31 GMT",
"version": "v1"
}
] | 2014-05-22 | [
[
"Sakalli",
"I.",
""
],
[
"Mirekhtiary",
"S. F.",
""
]
] | We study quasinormal modes (QNMs) of uncharged Grumiller black hole (GBH). This massive BH has a Rindler acceleration $a$, and hence it is also called Rindler modified Schwarzschild BH. After reducing the radial equation of the massless Klein-Gordon equation to the Zerilli equation, we compute the complex frequencies o... |
gr-qc/0209099 | V. Kurbanova | Alexander Balakin, Veronika Kurbanova, Winfried Zimdahl | Precession of a particle with anomalous magnetic moment in
electromagnetic and gravitational pp-wave fields | 8 pages, LaTex | Grav.Cosmol.Suppl. 8N2 (2002) 6-9 | null | null | gr-qc | null | We present an exact solution of the Bargmann-Michel-Telegdi (BMT) equations
for the dynamics of a spin particle in external electromagnetic and
gravitational pp-wave fields. We demonstrate that an anomalous magnetic moment
gives rise to an additional spin rotation which is modulated both by the
electromagnetic and by... | [
{
"created": "Thu, 26 Sep 2002 06:21:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Balakin",
"Alexander",
""
],
[
"Kurbanova",
"Veronika",
""
],
[
"Zimdahl",
"Winfried",
""
]
] | We present an exact solution of the Bargmann-Michel-Telegdi (BMT) equations for the dynamics of a spin particle in external electromagnetic and gravitational pp-wave fields. We demonstrate that an anomalous magnetic moment gives rise to an additional spin rotation which is modulated both by the electromagnetic and by t... |
1710.02701 | Yu-Ichi Takamizu | Yu-ichi Takamizu, David Chernoff | Collisions of false vacuum bubbles in cylindrical symmetry | 18 pages, 18 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the collision of two cylindrical bubbles in classical general
relativity with a scalar field stress-energy tensor. Inside each bubble the
field rests at a local minimum of the potential with non-negative energy
density. Outside the field rests at zero potential, the global minimum. The
calculation resolves... | [
{
"created": "Wed, 4 Oct 2017 06:28:32 GMT",
"version": "v1"
}
] | 2017-10-10 | [
[
"Takamizu",
"Yu-ichi",
""
],
[
"Chernoff",
"David",
""
]
] | We explore the collision of two cylindrical bubbles in classical general relativity with a scalar field stress-energy tensor. Inside each bubble the field rests at a local minimum of the potential with non-negative energy density. Outside the field rests at zero potential, the global minimum. The calculation resolves t... |
1106.2017 | Matej Pavsic | Matej Pavsic | Klein-Gordon-Wheeler-DeWitt-Schroedinger Equation | 14 pages; typos corrected; journal reference included | Physics Letters B 703 (2011) 614-619 | 10.1016/j.physletb.2011.08.041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We start from the Einstein-Hilbert action for the gravitational field in the
presence of a "point particle" source, and cast the action into the
corresponding phase space form. The dynamical variables of such a system
satisfy the point particle mass shell constraint, the Hamilton and the momentum
constraints of the c... | [
{
"created": "Fri, 10 Jun 2011 11:17:07 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jul 2011 12:15:02 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Sep 2011 08:57:32 GMT",
"version": "v3"
}
] | 2015-05-28 | [
[
"Pavsic",
"Matej",
""
]
] | We start from the Einstein-Hilbert action for the gravitational field in the presence of a "point particle" source, and cast the action into the corresponding phase space form. The dynamical variables of such a system satisfy the point particle mass shell constraint, the Hamilton and the momentum constraints of the can... |
0901.3724 | Mubasher Jamil | Mubasher Jamil and M. Umar Farooq | Interacting Holographic Viscous Dark Energy Model | 11 pages, accepted for publication in Int. J. Theor. Phys | Int. J. Theor. Phys. 49 (2010) 42-50 | 10.1007/s10773-009-0176-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we present a generalization of the interacting
holographic dark energy model using the viscous generalized Chaplygin gas. We
also study the model by considering a dynamical Newton's constant $G$. Then we
reconstruct the potential and the dynamics of the scalar field which describe
the viscous Chap... | [
{
"created": "Fri, 23 Jan 2009 16:55:12 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jun 2009 09:00:50 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Oct 2009 16:34:02 GMT",
"version": "v3"
}
] | 2009-12-18 | [
[
"Jamil",
"Mubasher",
""
],
[
"Farooq",
"M. Umar",
""
]
] | In this manuscript, we present a generalization of the interacting holographic dark energy model using the viscous generalized Chaplygin gas. We also study the model by considering a dynamical Newton's constant $G$. Then we reconstruct the potential and the dynamics of the scalar field which describe the viscous Chaply... |
1612.07664 | Lau Loi So | Lau Loi So | Dominant property for the Bel-Robinson tensor and tensor S | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bel-Robinson tensor contains many nice mathematical properties and its
dominant energy condition is desirable for describing the positive
gravitational energy. The dominant property is a basic requirement for the
quasi-local mass, i.e., in small sphere limit. We claim that there exists
another option, a linear co... | [
{
"created": "Thu, 22 Dec 2016 16:00:37 GMT",
"version": "v1"
}
] | 2016-12-23 | [
[
"So",
"Lau Loi",
""
]
] | The Bel-Robinson tensor contains many nice mathematical properties and its dominant energy condition is desirable for describing the positive gravitational energy. The dominant property is a basic requirement for the quasi-local mass, i.e., in small sphere limit. We claim that there exists another option, a linear comb... |
1803.00332 | Marios Christodoulou | Marios Christodoulou | Geometry Transition in Covariant Loop Quantum Gravity | PhD thesis submitted for the degree of Doctor in Theoretical and
Mathematical Physics. Defended at the Center for Theoretical
Physics/CNRS/Aix-Marseille University, the 23rd of October 2017. The
manuscript is written in English and begins with a short summary in French | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript we present a calculation of a physical observable in a
non-perturbative quantum gravitational physical process from covariant Loop
Quantum Gravity. The process regards the transition of a trapped region to an
anti--trapped region, treated as a quantum geometry transition akin to
gravitational tunne... | [
{
"created": "Thu, 1 Mar 2018 12:14:14 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Mar 2018 05:57:58 GMT",
"version": "v2"
}
] | 2018-03-20 | [
[
"Christodoulou",
"Marios",
""
]
] | In this manuscript we present a calculation of a physical observable in a non-perturbative quantum gravitational physical process from covariant Loop Quantum Gravity. The process regards the transition of a trapped region to an anti--trapped region, treated as a quantum geometry transition akin to gravitational tunneli... |
2101.08721 | Arunava Bhadra Dr. | Samrat Ghosh, Arunava Bhadra, Amitabha Mukhopadhyay, and Kabita Sarkar | Baryonic Tully-Fisher test of Grumiller's modified gravity model | 4 pages, two figures, To appear in Gravitation and Cosmology | null | 10.1134/S0202289321020067 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We test the Grumiller's quantum motivated modified gravity model, which at
large distances modifies the Newtonian potential and describes the galactic
rotation curves of disk galaxies in terms of a Rindler acceleration term
without the need of any dark matter, against the baryonic Tully-Fisher feature
that relates th... | [
{
"created": "Thu, 21 Jan 2021 17:03:03 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Ghosh",
"Samrat",
""
],
[
"Bhadra",
"Arunava",
""
],
[
"Mukhopadhyay",
"Amitabha",
""
],
[
"Sarkar",
"Kabita",
""
]
] | We test the Grumiller's quantum motivated modified gravity model, which at large distances modifies the Newtonian potential and describes the galactic rotation curves of disk galaxies in terms of a Rindler acceleration term without the need of any dark matter, against the baryonic Tully-Fisher feature that relates the ... |
2202.07431 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | A survey of recent studies concerning the extreme properties of
Morris-Thorne wormholes | 14 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been known for a long time that Morris-Thorne wormholes can only be
held open by violating the null energy condition, which can be expressed in the
form $\tau-\rho c^2>0$, where $\tau$ is the radial tension. Matter that
violates this condition is usually referred to as "exotic." For any wormhole
having a moder... | [
{
"created": "Tue, 15 Feb 2022 14:16:37 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2024 14:37:29 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Apr 2024 23:34:50 GMT",
"version": "v3"
}
] | 2024-04-19 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | It has been known for a long time that Morris-Thorne wormholes can only be held open by violating the null energy condition, which can be expressed in the form $\tau-\rho c^2>0$, where $\tau$ is the radial tension. Matter that violates this condition is usually referred to as "exotic." For any wormhole having a moderat... |
0910.2510 | Hiromi Saida | Hiromi Saida | To what extent is the entropy-area law universal ? -- Multi-horizon and
multi-temperature spacetime may break the entropy-area law -- | 39 pages in PTP format, 3 figures, Accepted for publication in
Prog.Theor.Phys, Typo is corrected (v2) | Prog.Theor.Phys.122:1515-1552,2010 | 10.1143/PTP.122.1515 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It seems to be a common understanding at present that, once event horizons
are in thermal equilibrium, the entropy-area law holds inevitably. However no
rigorous verification is given to such a very strong universality of the law in
multi-horizon spacetimes. Then, based on thermodynamically consistent and
rigorous di... | [
{
"created": "Wed, 14 Oct 2009 01:23:50 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Nov 2013 01:27:40 GMT",
"version": "v2"
}
] | 2013-11-05 | [
[
"Saida",
"Hiromi",
""
]
] | It seems to be a common understanding at present that, once event horizons are in thermal equilibrium, the entropy-area law holds inevitably. However no rigorous verification is given to such a very strong universality of the law in multi-horizon spacetimes. Then, based on thermodynamically consistent and rigorous disc... |
gr-qc/0401070 | Amit Ghosh | Amit Ghosh and P. Mitra | On the log correction to the black hole area law | 4 pages; added new results | Phys.Rev. D71 (2005) 027502 | 10.1103/PhysRevD.71.027502 | SINP/TNP/04-01 | gr-qc hep-th | null | Various approaches to black hole entropy yield the area law with logarithmic
corrections, many involving a coefficient 1/2, and some involving 3/2. It is
pointed out here that the standard quantum geometry formalism is not consistent
with 3/2 and favours 1/2.
| [
{
"created": "Fri, 16 Jan 2004 09:20:35 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jan 2004 06:18:58 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Jul 2004 06:32:00 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Ghosh",
"Amit",
""
],
[
"Mitra",
"P.",
""
]
] | Various approaches to black hole entropy yield the area law with logarithmic corrections, many involving a coefficient 1/2, and some involving 3/2. It is pointed out here that the standard quantum geometry formalism is not consistent with 3/2 and favours 1/2. |
1811.08349 | Chandrachur Chakraborty | Chandrachur Chakraborty (KIAA, China), Parthasarathi Majumdar (IACS,
India) | Spinning Gyroscope in an Acoustic Black Hole : Precession Effects and
Observational Aspects | 12 pages including 4 figures, accepted for publication in EPJC | Eur. Phys. J. C 80:493 (2020) | 10.1140/epjc/s10052-020-8060-1 | null | gr-qc cond-mat.other hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exact precession frequency of a freely-precessing test gyroscope is
derived for a $2+1$ dimensional rotating acoustic black hole analogue
spacetime, without making the somewhat unrealistic assumption that the
gyroscope is static. We show that, as a consequence, the gyroscope crosses the
acoustic ergosphere of the... | [
{
"created": "Tue, 20 Nov 2018 16:23:35 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Mar 2020 14:41:35 GMT",
"version": "v2"
},
{
"created": "Thu, 21 May 2020 05:48:39 GMT",
"version": "v3"
}
] | 2020-06-03 | [
[
"Chakraborty",
"Chandrachur",
"",
"KIAA, China"
],
[
"Majumdar",
"Parthasarathi",
"",
"IACS,\n India"
]
] | The exact precession frequency of a freely-precessing test gyroscope is derived for a $2+1$ dimensional rotating acoustic black hole analogue spacetime, without making the somewhat unrealistic assumption that the gyroscope is static. We show that, as a consequence, the gyroscope crosses the acoustic ergosphere of the b... |
1504.03416 | Farhad Darabi | F. Darabi | O'Hanlon actions by Noether symmetry | 5 pages | Chin. J. Phys. 53, 020101 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using the conformal symmetry between Brans-Dicke action with
$\omega=-\frac{3}{2}$ and O'Hanlon action, we seek the O'Hanlon actions in
Einstein frame respecting the Noether symmetry. Since the Noether symmetry is
preserved under conformal transformations, the existence of Noether symmetry in
the Brans-Dicke actio... | [
{
"created": "Tue, 14 Apr 2015 04:26:04 GMT",
"version": "v1"
}
] | 2015-04-15 | [
[
"Darabi",
"F.",
""
]
] | By using the conformal symmetry between Brans-Dicke action with $\omega=-\frac{3}{2}$ and O'Hanlon action, we seek the O'Hanlon actions in Einstein frame respecting the Noether symmetry. Since the Noether symmetry is preserved under conformal transformations, the existence of Noether symmetry in the Brans-Dicke action ... |
2405.02197 | Anuradha Gupta | Anuradha Gupta, K. G. Arun, Enrico Barausse, Laura Bernard, Emanuele
Berti, Sajad A. Bhat, Alessandra Buonanno, Vitor Cardoso, Shun Yin Cheung,
Teagan A. Clarke, Sayantani Datta, Arnab Dhani, Jose Mar\'ia Ezquiaga, Ish
Gupta, Nir Guttman, Tanja Hinderer, Qian Hu, Justin Janquart, Nathan K.
Johnson-McDaniel, Rah... | Possible Causes of False General Relativity Violations in Gravitational
Wave Observations | Review article; 1 figure; 1 table; comments welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity (GR) has proven to be a highly successful theory of
gravity since its inception. The theory has thrivingly passed numerous
experimental tests, predominantly in weak gravity, low relative speeds, and
linear regimes, but also in the strong-field and very low-speed regimes with
binary pulsars. Observa... | [
{
"created": "Fri, 3 May 2024 15:53:52 GMT",
"version": "v1"
}
] | 2024-05-06 | [
[
"Gupta",
"Anuradha",
""
],
[
"Arun",
"K. G.",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Bernard",
"Laura",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Bhat",
"Sajad A.",
""
],
[
"Buonanno",
"Alessandra",
""
],
[... | General relativity (GR) has proven to be a highly successful theory of gravity since its inception. The theory has thrivingly passed numerous experimental tests, predominantly in weak gravity, low relative speeds, and linear regimes, but also in the strong-field and very low-speed regimes with binary pulsars. Observabl... |
1506.02638 | Oleg Zaslavskii | O. B. Zaslavskii | Rotation as an origin of high energy particle collisions | 8 pages. Final version | Mod. Phys. Lett. A, Vol. 31, No. 4 (2016) 1650029 | 10.1142/S0217732316500292 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of two particles in rotating spacetimes without
horizons. If the metric coefficient responsible for rotation of spacetime is
big enough, the energy of collisions in the centre of mass frame can be as
large as one likes. This can happen in the ergoregion only. The results are
model-independent an... | [
{
"created": "Mon, 8 Jun 2015 19:50:51 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jan 2016 12:25:41 GMT",
"version": "v2"
}
] | 2016-01-22 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of two particles in rotating spacetimes without horizons. If the metric coefficient responsible for rotation of spacetime is big enough, the energy of collisions in the centre of mass frame can be as large as one likes. This can happen in the ergoregion only. The results are model-independent and ... |
2404.15998 | Saeed Noori Gashti | Jafar Sadeghi, Saeed Noori Gashti | Reissner-Nordstr\"om black holes surrounded by perfect fluid dark
matter: testing the viability of weak gravity conjecture and weak cosmic
censorship conjecture simultaneously | 17 pages, 2 figures | Physics Letters B 853, 138651 (2024) | 10.1016/j.physletb.2024.138651 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | A possible violation of the weak gravity conjecture (WGC) by cosmic
censorship is one of the major challenges in the field of general relativity.
However, in this paper, we explore the possibility of reconciling the WGC and
the WCCC by considering Reissner-Nordstr\"om (R-N) black holes embedded in
perfect fluid dark ... | [
{
"created": "Wed, 24 Apr 2024 17:19:07 GMT",
"version": "v1"
}
] | 2024-05-02 | [
[
"Sadeghi",
"Jafar",
""
],
[
"Gashti",
"Saeed Noori",
""
]
] | A possible violation of the weak gravity conjecture (WGC) by cosmic censorship is one of the major challenges in the field of general relativity. However, in this paper, we explore the possibility of reconciling the WGC and the WCCC by considering Reissner-Nordstr\"om (R-N) black holes embedded in perfect fluid dark ma... |
2202.04014 | Eric Ling | Eric Ling | Remarks on the cosmological constant appearing as an initial condition
for Milne-like spacetimes | 16 pages, 3 figures, article for the conference "Singularity
theorems, causality, and all that; a tribute to Roger Penrose." Final version
to appear in GRG | null | 10.1007/s10714-022-02955-y | null | gr-qc hep-th math-ph math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | Milne-like spacetimes are a class of $k = -1$ FLRW spacetimes which admit
continuous spacetime extensions through the big bang. In a previous paper [30],
it was shown that the cosmological constant appears as an initial condition for
Milne-like spacetimes. In this paper, we generalize this statement to
spacetimes whi... | [
{
"created": "Tue, 8 Feb 2022 17:31:14 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2022 14:04:36 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Jul 2022 18:06:34 GMT",
"version": "v3"
}
] | 2022-07-27 | [
[
"Ling",
"Eric",
""
]
] | Milne-like spacetimes are a class of $k = -1$ FLRW spacetimes which admit continuous spacetime extensions through the big bang. In a previous paper [30], it was shown that the cosmological constant appears as an initial condition for Milne-like spacetimes. In this paper, we generalize this statement to spacetimes which... |
2311.18464 | Andr\'e Gro{\ss}ardt | Andr\'e Gro{\ss}ardt | Self-gravitational dephasing of quasi-classical Stern-Gerlach
trajectories | null | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear Schr\"odinger-Newton equation, a prospective semiclassical
alternative to a quantized theory of gravity, predicts a gravitational
self-force between the two trajectories corresponding to the two z-spin
eigenvalues for a particle in a Stern-Gerlach interferometer. To leading order,
this force results in ... | [
{
"created": "Thu, 30 Nov 2023 11:17:45 GMT",
"version": "v1"
}
] | 2023-12-01 | [
[
"Großardt",
"André",
""
]
] | The nonlinear Schr\"odinger-Newton equation, a prospective semiclassical alternative to a quantized theory of gravity, predicts a gravitational self-force between the two trajectories corresponding to the two z-spin eigenvalues for a particle in a Stern-Gerlach interferometer. To leading order, this force results in a ... |
gr-qc/0605093 | Yanbei Chen | Yanbei Chen and Linqing Wen | Probing Spacetime Foam with Photons: Suppression of Observable Effects
due to Uncertainty in Optical Paths | 4 pages, 1 figure. Derivations and arguments refined. Results
unchanged | null | null | null | gr-qc | null | It was recently proposed to use extra-galactic point sources to constrain
space-time quantum fluctuations in the universe. In these proposals, the
fundamental "fuzziness" of distance caused by space-time quantum fluctuations
have been directly identified with fluctuations in optical paths. Phase-front
corrugations de... | [
{
"created": "Wed, 17 May 2006 15:29:23 GMT",
"version": "v1"
},
{
"created": "Wed, 17 May 2006 23:20:01 GMT",
"version": "v2"
},
{
"created": "Sat, 27 May 2006 03:36:12 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Chen",
"Yanbei",
""
],
[
"Wen",
"Linqing",
""
]
] | It was recently proposed to use extra-galactic point sources to constrain space-time quantum fluctuations in the universe. In these proposals, the fundamental "fuzziness" of distance caused by space-time quantum fluctuations have been directly identified with fluctuations in optical paths. Phase-front corrugations dedu... |
2205.03564 | Lakhan V. Jaybhaye | Lakhan V. Jaybhaye, Raja Solanki, Sanjay Mandal, P.K. Sahoo | Cosmology in $f(R,L_m)$ gravity | PLB published version | Physics Letters B, 831 (2022) 137148 | 10.1016/j.physletb.2022.137148 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this letter, we investigate the cosmic expansion scenario of the universe
in the framework of $f(R,L_m)$ gravity theory. We consider a non-linear
$f(R,L_m)$ model, specifically, $f(R,L_m)=\frac{R}{2}+L_m^n + \beta$, where $n$
and $\beta$ are free model parameters. Then we derive the motion equations for
flat FLRW ... | [
{
"created": "Sat, 7 May 2022 06:10:40 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2023 08:52:22 GMT",
"version": "v2"
}
] | 2023-11-02 | [
[
"Jaybhaye",
"Lakhan V.",
""
],
[
"Solanki",
"Raja",
""
],
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this letter, we investigate the cosmic expansion scenario of the universe in the framework of $f(R,L_m)$ gravity theory. We consider a non-linear $f(R,L_m)$ model, specifically, $f(R,L_m)=\frac{R}{2}+L_m^n + \beta$, where $n$ and $\beta$ are free model parameters. Then we derive the motion equations for flat FLRW un... |
1509.04974 | Vladimir Khatsymovsky | V.M. Khatsymovsky | Affine connection form of Regge calculus | 9 pages | Mod. Phys. Lett. A, Vol. 31, No. 01 (2016) 1650010 | 10.1142/S0217732316500103 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regge action is represented analogously to how the Palatini action for
general relativity (GR) as some functional of the metric and a general
connection as independent variables represents the Einstein-Hilbert action.
The piecewise flat (or simplicial) spacetime of Regge calculus is equipped
with some world coordin... | [
{
"created": "Wed, 16 Sep 2015 16:46:47 GMT",
"version": "v1"
}
] | 2016-06-17 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | Regge action is represented analogously to how the Palatini action for general relativity (GR) as some functional of the metric and a general connection as independent variables represents the Einstein-Hilbert action. The piecewise flat (or simplicial) spacetime of Regge calculus is equipped with some world coordinates... |
2212.12273 | Kirill Krasnov | Kirill Krasnov and Adam Shaw | Weyl Curvature Evolution System for GR | 15 pages, no figures | null | 10.1088/1361-6382/acc0cc | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the chiral first-order pure connection formulation of General
Relativity, we put the field equations of GR in a strikingly simple evolution
system form. The two dynamical fields are a complex symmetric tracefree 3x3
matrix Psi, which encodes the self-dual part of the Weyl curvature tensor, as
well as a ... | [
{
"created": "Fri, 23 Dec 2022 11:50:33 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Krasnov",
"Kirill",
""
],
[
"Shaw",
"Adam",
""
]
] | Starting from the chiral first-order pure connection formulation of General Relativity, we put the field equations of GR in a strikingly simple evolution system form. The two dynamical fields are a complex symmetric tracefree 3x3 matrix Psi, which encodes the self-dual part of the Weyl curvature tensor, as well as a sp... |
2309.06225 | Llibert Arest\'e Sal\'o | Llibert Arest\'e Sal\'o, Sam E. Brady, Katy Clough, Daniela Doneva,
Tamara Evstafyeva, Pau Figueras, Tiago Fran\c{c}a, Lorenzo Rossi and Shunhui
Yao | GRFolres: A code for modified gravity simulations in strong gravity | null | J.Open Source Softw. 9 (2024) 98, 6369 | 10.21105/joss.06369 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GRFolres is an open-source code for performing simulations in modified
theories of gravity, based on the publicly available 3+1D numerical relativity
code GRChombo.
Note: Submitted for review in the Journal of Open Source Software; Comments
welcome; The code can be found at https://github.com/GRChombo/GRFolres
| [
{
"created": "Tue, 12 Sep 2023 13:42:27 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Sep 2023 10:57:01 GMT",
"version": "v2"
}
] | 2024-06-14 | [
[
"Saló",
"Llibert Aresté",
""
],
[
"Brady",
"Sam E.",
""
],
[
"Clough",
"Katy",
""
],
[
"Doneva",
"Daniela",
""
],
[
"Evstafyeva",
"Tamara",
""
],
[
"Figueras",
"Pau",
""
],
[
"França",
"Tiago",
""
],
[
... | GRFolres is an open-source code for performing simulations in modified theories of gravity, based on the publicly available 3+1D numerical relativity code GRChombo. Note: Submitted for review in the Journal of Open Source Software; Comments welcome; The code can be found at https://github.com/GRChombo/GRFolres |
gr-qc/0408002 | Richard Woodard | R. P. Woodard | De Sitter Breaking in Field Theory | 16 pages, LaTeX 2e, no figures, to appear in the proceedings of
"Deserfest: A celebration of the life and works of Stanley Deser", University
of Michigan, Ann Arbor, April 3-5, 2004 | null | null | UFIFT-QG-04-2 | gr-qc hep-ph hep-th | null | I argue against the widespread notion that manifest de Sitter invariance on
the full de Sitter manifold is either useful or even attainable in gauge
theories. Green's functions and propagators computed in a de Sitter invariant
gauge are generally more complicated than in some noninvariant gauges. What is
worse, solvi... | [
{
"created": "Sat, 31 Jul 2004 14:58:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Woodard",
"R. P.",
""
]
] | I argue against the widespread notion that manifest de Sitter invariance on the full de Sitter manifold is either useful or even attainable in gauge theories. Green's functions and propagators computed in a de Sitter invariant gauge are generally more complicated than in some noninvariant gauges. What is worse, solving... |
2202.10892 | Hajar Belmahi H.Belmahi | Adil Belhaj, Hajar Belmahi, Mohamed Benali, Hasan El Moumni, Mohammed
Amine Essebani, Moulay Brahim Sedra | Optical Shadows of Rotating Bardeen AdS Black Holes | 16 pages, 5 figures, Accepted for publication in Modern Physics
Letters A | Modern Physics Letters A (2022) | 10.1142/S0217732322500328 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Hamilton-Jacobi method, we study certain optical shadows of
rotating Bardeen-AdS black holes in the presence of internal and external field
contributions. Precisely, we examine the shadow using one-dimensional real
curves. By establishing the equations of motion of such AdS black holes without
external dark... | [
{
"created": "Tue, 22 Feb 2022 13:40:59 GMT",
"version": "v1"
}
] | 2022-04-13 | [
[
"Belhaj",
"Adil",
""
],
[
"Belmahi",
"Hajar",
""
],
[
"Benali",
"Mohamed",
""
],
[
"Moumni",
"Hasan El",
""
],
[
"Essebani",
"Mohammed Amine",
""
],
[
"Sedra",
"Moulay Brahim",
""
]
] | Using the Hamilton-Jacobi method, we study certain optical shadows of rotating Bardeen-AdS black holes in the presence of internal and external field contributions. Precisely, we examine the shadow using one-dimensional real curves. By establishing the equations of motion of such AdS black holes without external dark s... |
gr-qc/0105069 | Brett D. Altschul | B. Altschul, R. Jackiw | Photon Decay at the Schwarzschild Horizon | 11 pages, no figures | Phys.Lett. B515 (2001) 451-457 | 10.1016/S0370-2693(01)00848-6 | MIT-CTP-3140 | gr-qc hep-th | null | A recent proposal that gravity theory is an emergent phenomenon also entails
the possibility of photon decay near the Schwarzschild event horizon. We
present a possible mechanism for such decay, which utilizes a dimensional
reduction near the horizon.
| [
{
"created": "Fri, 18 May 2001 19:04:23 GMT",
"version": "v1"
},
{
"created": "Mon, 21 May 2001 17:36:41 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Altschul",
"B.",
""
],
[
"Jackiw",
"R.",
""
]
] | A recent proposal that gravity theory is an emergent phenomenon also entails the possibility of photon decay near the Schwarzschild event horizon. We present a possible mechanism for such decay, which utilizes a dimensional reduction near the horizon. |
gr-qc/0305015 | Clemens Heuson | Clemens Heuson | A Simple Deformation of Special Relativity | 6 pages, 0 figures | null | null | null | gr-qc | null | A deformation of special relativity based on a dispersion relation with an
energy independent speed of light and a symmetry between positive and negative
energy states is proposed. The deformed Lorentz transformations, generators and
algebra are derived and some consequences are discussed.
| [
{
"created": "Sat, 3 May 2003 15:57:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Heuson",
"Clemens",
""
]
] | A deformation of special relativity based on a dispersion relation with an energy independent speed of light and a symmetry between positive and negative energy states is proposed. The deformed Lorentz transformations, generators and algebra are derived and some consequences are discussed. |
gr-qc/0604029 | Spiros Cotsakis | Spiros Cotsakis and Ifigeneia Klaoudatou | Cosmological Singularities and Bel-Robinson Energy | 20 pages, latex; v2: 21 pages, additions to comply with final
version, to appear in the J. Geom. Phys | J.Geom.Phys. 57 (2007) 1303-1312 | 10.1016/j.geomphys.2006.10.007 | RG-MPC/060405-1 | gr-qc | null | We consider the problem of describing the asymptotic behaviour of
\textsc{FRW} universes near their spacetime singularities in general
relativity. We find that the Bel-Robinson energy of these universes in
conjunction with the Hubble expansion rate and the scale factor proves to be an
appropriate measure leading to a... | [
{
"created": "Thu, 6 Apr 2006 13:37:46 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Oct 2006 14:09:16 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
]
] | We consider the problem of describing the asymptotic behaviour of \textsc{FRW} universes near their spacetime singularities in general relativity. We find that the Bel-Robinson energy of these universes in conjunction with the Hubble expansion rate and the scale factor proves to be an appropriate measure leading to a c... |
0910.0282 | Arundhati Dasgupta | Arundhati Dasgupta | Quantum Gravity Effects on Unstable Orbits in Schwarzschild Space-time | 12 pages; published version | JCAP 1005:011,2010 | 10.1088/1475-7516/2010/05/011 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study semiclassical corrections to the Schwarzchild metric, and their
effects on unstable orbits.
| [
{
"created": "Thu, 1 Oct 2009 22:18:58 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Oct 2010 21:28:54 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Dasgupta",
"Arundhati",
""
]
] | We study semiclassical corrections to the Schwarzchild metric, and their effects on unstable orbits. |
2105.05872 | H\'ector Estell\'es | H\'ector Estell\'es, Marta Colleoni, Cecilio Garc\'ia-Quir\'os, Sascha
Husa, David Keitel, Maite Mateu-Lucena, Maria de Lluc Planas, Antoni
Ramos-Buades | New twists in compact binary waveform modelling: a fast time domain
model for precession | 18 pages, 10 figures, 4 tables | null | 10.1103/PhysRevD.105.084040 | LIGO-P2100136 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present IMRPhenomTPHM, a phenomenological model for the gravitational wave
signals emitted by the coalescence of quasi-circular precessing binary black
holes systems. The model is based on the "twisting up" approximation, which
maps non-precessing signals to precessing ones in terms of a time dependent
rotation de... | [
{
"created": "Wed, 12 May 2021 18:00:12 GMT",
"version": "v1"
},
{
"created": "Mon, 17 May 2021 15:37:53 GMT",
"version": "v2"
}
] | 2022-05-04 | [
[
"Estellés",
"Héctor",
""
],
[
"Colleoni",
"Marta",
""
],
[
"García-Quirós",
"Cecilio",
""
],
[
"Husa",
"Sascha",
""
],
[
"Keitel",
"David",
""
],
[
"Mateu-Lucena",
"Maite",
""
],
[
"Planas",
"Maria de Lluc",
... | We present IMRPhenomTPHM, a phenomenological model for the gravitational wave signals emitted by the coalescence of quasi-circular precessing binary black holes systems. The model is based on the "twisting up" approximation, which maps non-precessing signals to precessing ones in terms of a time dependent rotation desc... |
1001.4960 | Stefano Finazzi | Carlos Barcel\'o, Stefano Finazzi, Stefano Liberati | On the impossibility of superluminal travel: the warp drive lesson | Second prize of the 2009 FQXi essay contest "What is Ultimately
Possible in Physics?" | null | null | null | gr-qc physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question of whether it is possible or not to surpass the speed of light
is already centennial. The special theory of relativity took the existence of a
speed limit as a principle, the light postulate, which has proven to be
enormously predictive. Here we discuss some of its twists and turns when
general relativit... | [
{
"created": "Wed, 27 Jan 2010 14:40:23 GMT",
"version": "v1"
}
] | 2010-01-29 | [
[
"Barceló",
"Carlos",
""
],
[
"Finazzi",
"Stefano",
""
],
[
"Liberati",
"Stefano",
""
]
] | The question of whether it is possible or not to surpass the speed of light is already centennial. The special theory of relativity took the existence of a speed limit as a principle, the light postulate, which has proven to be enormously predictive. Here we discuss some of its twists and turns when general relativity ... |
1204.0683 | Sean Gryb B | Sean Gryb | Shape dynamics and Mach's principles: Gravity from conformal
geometrodynamics | 117 pages, 2 tables, 10 figures, PhD thesis | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this PhD thesis, we develop a new approach to classical gravity starting
from Mach's principles and the idea that the local shape of spatial
configurations is fundamental. This new theory, "shape dynamics", is equivalent
to general relativity but differs in an important respect: shape dynamics is a
theory of dynam... | [
{
"created": "Tue, 3 Apr 2012 13:07:53 GMT",
"version": "v1"
}
] | 2012-04-04 | [
[
"Gryb",
"Sean",
""
]
] | In this PhD thesis, we develop a new approach to classical gravity starting from Mach's principles and the idea that the local shape of spatial configurations is fundamental. This new theory, "shape dynamics", is equivalent to general relativity but differs in an important respect: shape dynamics is a theory of dynamic... |
0905.1077 | George E. A. Matsas | G. E. A. Matsas, M. Richartz, A. Saa, A. R. R. da Silva and D. A. T.
Vanzella | Can quantum mechanics fool the cosmic censor? | 5 pages, to appear as a Rapid Communication in Phys. Rev. D | Phys.Rev.D79:101502,2009 | 10.1103/PhysRevD.79.101502 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the mechanism for violating the weak cosmic-censorship conjecture
(WCCC) by overspinning a nearly-extreme charged black hole. The mechanism
consists of an incoming massless neutral scalar particle, with low energy and
large angular momentum, tunneling into the hole. We investigate the effect of
the large a... | [
{
"created": "Thu, 7 May 2009 17:24:23 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Matsas",
"G. E. A.",
""
],
[
"Richartz",
"M.",
""
],
[
"Saa",
"A.",
""
],
[
"da Silva",
"A. R. R.",
""
],
[
"Vanzella",
"D. A. T.",
""
]
] | We revisit the mechanism for violating the weak cosmic-censorship conjecture (WCCC) by overspinning a nearly-extreme charged black hole. The mechanism consists of an incoming massless neutral scalar particle, with low energy and large angular momentum, tunneling into the hole. We investigate the effect of the large ang... |
2008.07391 | Daniela Doneva | Daniela D. Doneva, Lucas G. Collodel, Christian J. Kr\"uger, Stoytcho
S. Yazadjiev | Black hole scalarization induced by the spin -- 2+1 time evolution | 14 pages, 3 figures | Phys. Rev. D 102, 104027 (2020) | 10.1103/PhysRevD.102.104027 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scalarization is a very interesting phenomena allowing to endow a compact
object with scalar hair while leaving all the predictions in the weak field
limit unaltered. In Gauss-Bonnet gravity the source of the scalar field can be
the curvature of the space-time. It was recently shown that for a particular
type of ... | [
{
"created": "Mon, 17 Aug 2020 15:02:57 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Collodel",
"Lucas G.",
""
],
[
"Krüger",
"Christian J.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | The scalarization is a very interesting phenomena allowing to endow a compact object with scalar hair while leaving all the predictions in the weak field limit unaltered. In Gauss-Bonnet gravity the source of the scalar field can be the curvature of the space-time. It was recently shown that for a particular type of co... |
gr-qc/9704019 | Scott A. Hughes | Patrick R. Brady, Scott A. Hughes | The central density of a neutron star is unaffected by a binary
companion at linear order in $\mu/R$ | 3 pages, REVTeX, no figures, submitted to Phys Rev D as a Rapid
Communication | Phys.Rev.Lett. 79 (1997) 1186-1188 | 10.1103/PhysRevLett.79.1186 | GRP-466 | gr-qc astro-ph | null | Recent numerical work by Wilson, Mathews, and Marronetti [J. R. Wilson, G. J.
Mathews and P. Marronetti, Phys. Rev. D 54, 1317 (1996)] on the coalescence of
massive binary neutron stars shows a striking instability as the stars come
close together: Each star's central density increases by an amount proportional
to 1/... | [
{
"created": "Tue, 8 Apr 1997 20:57:02 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Brady",
"Patrick R.",
""
],
[
"Hughes",
"Scott A.",
""
]
] | Recent numerical work by Wilson, Mathews, and Marronetti [J. R. Wilson, G. J. Mathews and P. Marronetti, Phys. Rev. D 54, 1317 (1996)] on the coalescence of massive binary neutron stars shows a striking instability as the stars come close together: Each star's central density increases by an amount proportional to 1/(o... |
gr-qc/0505065 | Matt Visser | Carlos Barcelo (IAA, Granada), Stefano Liberati (SISSA/ISAS, Trieste),
and Matt Visser (Victoria University of Wellington) | Analogue Gravity | V1: 151 pages; 12 figures; 427 references. V2: 152 pages, added 8
references and expanded discussion of a few technical points. V3: Major
update as of 10 May 2011; Completely revised and updated previous version.
Significantly extended Sections 2.4, 3, 4.1, 5, and 7. Introduced new Section
6. Eight new figures ... | Living Rev.Rel.8:12,2005 | 10.12942/lrr-2005-12 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analogue gravity is a research programme which investigates analogues of
general relativistic gravitational fields within other physical systems,
typically but not exclusively condensed matter systems, with the aim of gaining
new insights into their corresponding problems. Analogue models of (and for)
gravity have a ... | [
{
"created": "Fri, 13 May 2005 03:50:40 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jun 2005 00:16:05 GMT",
"version": "v2"
},
{
"created": "Thu, 12 May 2011 13:58:47 GMT",
"version": "v3"
}
] | 2016-10-19 | [
[
"Barcelo",
"Carlos",
"",
"IAA, Granada"
],
[
"Liberati",
"Stefano",
"",
"SISSA/ISAS, Trieste"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Analogue gravity is a research programme which investigates analogues of general relativistic gravitational fields within other physical systems, typically but not exclusively condensed matter systems, with the aim of gaining new insights into their corresponding problems. Analogue models of (and for) gravity have a lo... |
1504.06857 | Malcolm MacCallum | Malcolm A.H. MacCallum | Spacetime invariants and their uses | Talk given at the International Conference on Relativistic
Astrophysics, Lahore, February 2015. To appear in the proceedings, to be
published by Punjab University Press | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are various types of global and local spacetime invariant in general
relativity. Here I focus on the local invariants obtainable from the curvature
tensor and its derivatives. The number of such invariants at each order of
differentiation that are algebraically independent will be discussed. There is
no univers... | [
{
"created": "Sun, 26 Apr 2015 17:48:58 GMT",
"version": "v1"
}
] | 2015-04-28 | [
[
"MacCallum",
"Malcolm A. H.",
""
]
] | There are various types of global and local spacetime invariant in general relativity. Here I focus on the local invariants obtainable from the curvature tensor and its derivatives. The number of such invariants at each order of differentiation that are algebraically independent will be discussed. There is no universal... |
1305.5513 | Helgi Freyr R\'unarsson | Carlos A. R. Herdeiro and Juan Carlos Degollado and Helgi Freyr
R\'unarsson | Rapid growth of superradiant instabilities for charged black holes in a
cavity | 7 pages, 3 figures | null | 10.1103/PhysRevD.88.063003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Confined scalar fields, either by a mass term or by a mirror-like boundary
condition, have unstable modes in the background of a Kerr black hole. Assuming
a time dependence as $e^{-i\omega t}$, the growth time-scale of these unstable
modes is set by the inverse of the (positive) imaginary part of the frequency,
Im$(\... | [
{
"created": "Thu, 23 May 2013 18:38:13 GMT",
"version": "v1"
}
] | 2013-09-11 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Rúnarsson",
"Helgi Freyr",
""
]
] | Confined scalar fields, either by a mass term or by a mirror-like boundary condition, have unstable modes in the background of a Kerr black hole. Assuming a time dependence as $e^{-i\omega t}$, the growth time-scale of these unstable modes is set by the inverse of the (positive) imaginary part of the frequency, Im$(\om... |
2204.13468 | Paulo C. Freire | Paulo C. C. Freire | Tests of gravity theories with pulsar timing | 5 pages, 3 figures, contribution to the 2022 Gravitation session of
the 56th Rencontres de Moriond | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Over the last few years, a set of new results from pulsar timing has
introduced much tighter constraints on violations of the strong equivalence
principle (SEP), either via a direct verification of the universality of free
fall for a pulsar in a triple star system, or from tests of the nature of
gravitational waves, ... | [
{
"created": "Thu, 28 Apr 2022 13:00:58 GMT",
"version": "v1"
},
{
"created": "Mon, 9 May 2022 09:45:08 GMT",
"version": "v2"
}
] | 2022-05-10 | [
[
"Freire",
"Paulo C. C.",
""
]
] | Over the last few years, a set of new results from pulsar timing has introduced much tighter constraints on violations of the strong equivalence principle (SEP), either via a direct verification of the universality of free fall for a pulsar in a triple star system, or from tests of the nature of gravitational waves, in... |
1205.2839 | Lorenzo Fatibene | Lorenzo Fatibene, Mauro Francaviglia, Roberto Giamb\`o, Giulio Magli | Dynamics And Thermodynamics Of Blackholes And Naked Singularities II | Links added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Proceedings of the second edition of the international Workshop "Dynamics and
Thermodynamics of Blackholes and Naked Singularities" (Department of
Mathematics of the Politecnico of Milano from May 10-12, 2007.
| [
{
"created": "Sun, 13 May 2012 07:45:04 GMT",
"version": "v1"
},
{
"created": "Sun, 20 May 2012 08:28:43 GMT",
"version": "v2"
}
] | 2012-05-22 | [
[
"Fatibene",
"Lorenzo",
""
],
[
"Francaviglia",
"Mauro",
""
],
[
"Giambò",
"Roberto",
""
],
[
"Magli",
"Giulio",
""
]
] | Proceedings of the second edition of the international Workshop "Dynamics and Thermodynamics of Blackholes and Naked Singularities" (Department of Mathematics of the Politecnico of Milano from May 10-12, 2007. |
2404.04046 | Ali \"Ovg\"un Dr. | Vitalii Vertogradov, Ali \"Ovg\"un | Analyzing the Influence of Geometrical Deformation on Photon Sphere and
Shadow Radius: A New Analytical Approach -- Spherically Symmetric Spacetimes | 11 pages and 3 figures. Accepted for publication in Physics of the
Dark Universe | Phys.Dark Univ. 45, 101541 (2024) | 10.1016/j.dark.2024.101541 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we introduce a new approach to study the behavior of the
photon sphere and shadow radius. Our method uses extended gravitational
decoupling and reveals two important analytic results. First, the additional
matter field alters the photon sphere radius: it increases if
$g'(r_{ph}^{(0)})>0$ and decreases ... | [
{
"created": "Fri, 5 Apr 2024 11:59:47 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2024 18:17:38 GMT",
"version": "v2"
},
{
"created": "Sat, 1 Jun 2024 18:36:26 GMT",
"version": "v3"
}
] | 2024-06-04 | [
[
"Vertogradov",
"Vitalii",
""
],
[
"Övgün",
"Ali",
""
]
] | In this paper, we introduce a new approach to study the behavior of the photon sphere and shadow radius. Our method uses extended gravitational decoupling and reveals two important analytic results. First, the additional matter field alters the photon sphere radius: it increases if $g'(r_{ph}^{(0)})>0$ and decreases if... |
gr-qc/9909032 | Igor Kanatczikow | I.V. Kanatchikov | Towards a "pre-canonical" quantization of gravity without the space+time
decomposition | 19 pages, LaTeX2e | null | null | FSU TPI 01/99 | gr-qc | null | Quantization of gravity is discussed in the context of field quantization
based on an analogue of canonical formalism (the De Donder-Weyl canonical
theory) which does not require the space+time decomposition. Using Horava's
(1991) De Donder-Weyl formulation of General Relativity we put forward a
covariant generalizat... | [
{
"created": "Thu, 9 Sep 1999 17:42:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kanatchikov",
"I. V.",
""
]
] | Quantization of gravity is discussed in the context of field quantization based on an analogue of canonical formalism (the De Donder-Weyl canonical theory) which does not require the space+time decomposition. Using Horava's (1991) De Donder-Weyl formulation of General Relativity we put forward a covariant generalizatio... |
gr-qc/9903050 | Ali Shojai Baghini | Fatimah Shojai and Ali Shojai and Mehdi Golshani | Scalar-Tensor Theories and Quantum Gravity | 12 pages, RevTex | Mod.Phys.Lett. A13 (1998) 2915-2922 | 10.1142/S0217732398003090 | null | gr-qc | null | Recently, it was shown that the quantum effects of the matter, could be used
to determine the conformal degree of freedom of the space-time metric. So both
gravity and quantum are geometrical features. Gravity determines the causal
structure of the space-time, while quantum determines the scale of the
space-time. In ... | [
{
"created": "Sat, 13 Mar 1999 13:10:57 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Shojai",
"Fatimah",
""
],
[
"Shojai",
"Ali",
""
],
[
"Golshani",
"Mehdi",
""
]
] | Recently, it was shown that the quantum effects of the matter, could be used to determine the conformal degree of freedom of the space-time metric. So both gravity and quantum are geometrical features. Gravity determines the causal structure of the space-time, while quantum determines the scale of the space-time. In th... |
1609.00907 | Pier Paolo Giardino | Hooman Davoudiasl and Pier Paolo Giardino | Gravitational Waves from Primordial Black Holes and New Weak Scale
Phenomena | 5 pages, 3 figures; V2: Substantial addition to text addressing
recent experimental results, and emphasizing potential relations to particle
physics (as reflected in title and abstract). References added. V3: Journal
version | Phys.Lett. B768 (2017) 198-202 | 10.1016/j.physletb.2017.02.054 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We entertain the possibility that primordialblack holes of mass $\sim
(10^{26}$--$10^{29})$~g, with Schwarzschild radii of $\mathcal{O}{\text{cm}}$,
constitute $\sim 10\%$ or more of cosmic dark matter, as allowed by various
constraints. These black holes would typically originate from cosmological eras
corresponding... | [
{
"created": "Sun, 4 Sep 2016 08:58:44 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2017 19:40:04 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Mar 2017 20:04:49 GMT",
"version": "v3"
}
] | 2017-03-13 | [
[
"Davoudiasl",
"Hooman",
""
],
[
"Giardino",
"Pier Paolo",
""
]
] | We entertain the possibility that primordialblack holes of mass $\sim (10^{26}$--$10^{29})$~g, with Schwarzschild radii of $\mathcal{O}{\text{cm}}$, constitute $\sim 10\%$ or more of cosmic dark matter, as allowed by various constraints. These black holes would typically originate from cosmological eras corresponding t... |
2307.14691 | Himanshu Chaudhary | Himanshu Chaudhary, Ujjal Debnath, Tanusree Roy, Sayani Maity,
G.Mustafa, Monika Arora | Constraints on the parameters of modified Chaplygin-Jacobi and modified
Chaplygin-Abel gases in $f(T)$ gravity | 25 pages, 20 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we investigate two dark energy models, MCJG and MCAG, in the
context of $f(T)$ gravity within a non-flat FLRW Universe. Our analysis
considers radiation, dark matter, and dark energy components. We compare the
equation of state for MCJG and MCAG with $f(T)$ gravity. Using recent
astronomical data (e.g.... | [
{
"created": "Thu, 27 Jul 2023 08:27:37 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2024 06:15:22 GMT",
"version": "v2"
}
] | 2024-01-24 | [
[
"Chaudhary",
"Himanshu",
""
],
[
"Debnath",
"Ujjal",
""
],
[
"Roy",
"Tanusree",
""
],
[
"Maity",
"Sayani",
""
],
[
"Mustafa",
"G.",
""
],
[
"Arora",
"Monika",
""
]
] | In this study, we investigate two dark energy models, MCJG and MCAG, in the context of $f(T)$ gravity within a non-flat FLRW Universe. Our analysis considers radiation, dark matter, and dark energy components. We compare the equation of state for MCJG and MCAG with $f(T)$ gravity. Using recent astronomical data (e.g., ... |
gr-qc/9707032 | J. E. Nelson | V. Moncrief and J. E. Nelson | Constants of motion and the conformal anti - de Sitter algebra in
(2+1)-Dimensional Gravity | 22 pages, Plain Tex, No Figures | Int.J.Mod.Phys.D6:545-562,1997 | 10.1142/S0218271897000339 | DFTT 37/97, YCTP-P10-97, ESI Preprint 475 | gr-qc hep-th | null | Constants of motion are calculated for 2+1 dimensional gravity with topology
R x T^2 and negative cosmological constant. Certain linear combinations of them
satisfy the anti - de Sitter algebra so(2,2) in either ADM or holonomy
variables. Quantisation is straightforward in terms of the holonomy parameters.
On inclusi... | [
{
"created": "Tue, 15 Jul 1997 10:30:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Moncrief",
"V.",
""
],
[
"Nelson",
"J. E.",
""
]
] | Constants of motion are calculated for 2+1 dimensional gravity with topology R x T^2 and negative cosmological constant. Certain linear combinations of them satisfy the anti - de Sitter algebra so(2,2) in either ADM or holonomy variables. Quantisation is straightforward in terms of the holonomy parameters. On inclusion... |
1905.12946 | Nafiseh Rahmanpour | Matin Honardoost, Nima Khosravi, Nafiseh Rahmanpour | Hairy Waves: Gravitational Waves in the presence of Screening Mechanism | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a binary system in the context of screened modified gravity
models and investigate its emitted gravitational wave which has been shown that
is a hairy wave. We derive power of the gravitational wave and the binding
energy of the binary system and then trace back the effect of the additional
scalar field, ... | [
{
"created": "Thu, 30 May 2019 10:20:35 GMT",
"version": "v1"
}
] | 2019-05-31 | [
[
"Honardoost",
"Matin",
""
],
[
"Khosravi",
"Nima",
""
],
[
"Rahmanpour",
"Nafiseh",
""
]
] | We consider a binary system in the context of screened modified gravity models and investigate its emitted gravitational wave which has been shown that is a hairy wave. We derive power of the gravitational wave and the binding energy of the binary system and then trace back the effect of the additional scalar field, pr... |
1109.5234 | Shuvendu Chakraborty | Shuvendu Chakraborty and Ujjal Debnath | Brans-Dicke Theory in Anisotropic Model with Viscous Fluid | 5 pages | Gravitation and Cosmology, 2011, Vol. 17, No. 3, pp. 280--283 | 10.1134/S0202289311030029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have considered an anisotropic space-time model of the
Universe in presence of Brans-Dicke (BD) scalar field $\phi$, causal viscous
fluid and barotropic fluid. We have shown that irrespective of fluid the
causality theory provides late time acceleration of the Universe. If the
deceleration occurs in ... | [
{
"created": "Sat, 24 Sep 2011 06:06:57 GMT",
"version": "v1"
}
] | 2011-09-27 | [
[
"Chakraborty",
"Shuvendu",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this paper we have considered an anisotropic space-time model of the Universe in presence of Brans-Dicke (BD) scalar field $\phi$, causal viscous fluid and barotropic fluid. We have shown that irrespective of fluid the causality theory provides late time acceleration of the Universe. If the deceleration occurs in ra... |
2406.01318 | Mohammad Abu Thaher Chowdhury | Mohammad Abu Thaher Chowdhury | Advancements in Glitch Subtraction Systems for Enhancing Gravitational
Wave Data Analysis: A Brief Review | 8 pages | null | null | null | gr-qc astro-ph.IM physics.space-ph | http://creativecommons.org/licenses/by/4.0/ | Glitches are transitory noise artifacts that degrade the detection
sensitivity and accuracy of interferometric observatories such as LIGO and
Virgo in gravitational wave astronomy. Reliable glitch subtraction techniques
are essential for separating genuine gravitational wave signals from background
noise and improvin... | [
{
"created": "Mon, 3 Jun 2024 13:35:21 GMT",
"version": "v1"
}
] | 2024-06-04 | [
[
"Chowdhury",
"Mohammad Abu Thaher",
""
]
] | Glitches are transitory noise artifacts that degrade the detection sensitivity and accuracy of interferometric observatories such as LIGO and Virgo in gravitational wave astronomy. Reliable glitch subtraction techniques are essential for separating genuine gravitational wave signals from background noise and improving ... |
2208.04356 | Keefe Mitman | Keefe Mitman, Leo C. Stein, Michael Boyle, Nils Deppe, Fran\c{c}ois
H\'ebert, Lawrence E. Kidder, Jordan Moxon, Mark A. Scheel, Saul A.
Teukolsky, William Throwe, and Nils L. Vu | Fixing the BMS frame of numerical relativity waveforms with BMS charges | 16+4 pages with 2 appendices, 4 figures, 1 table | Phys. Rev. D 106, 084029 (2022) | 10.1103/PhysRevD.106.084029 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Bondi-van der Burg-Metzner-Sachs (BMS) group, which uniquely describes
the symmetries of asymptotic infinity and therefore of the gravitational waves
that propagate there, has become increasingly important for accurate modeling
of waveforms. In particular, waveform models, such as post-Newtonian (PN)
expressions,... | [
{
"created": "Mon, 8 Aug 2022 18:23:01 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Oct 2022 16:04:39 GMT",
"version": "v2"
}
] | 2022-10-24 | [
[
"Mitman",
"Keefe",
""
],
[
"Stein",
"Leo C.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Deppe",
"Nils",
""
],
[
"Hébert",
"François",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Moxon",
"Jordan",
""
],
[
"... | The Bondi-van der Burg-Metzner-Sachs (BMS) group, which uniquely describes the symmetries of asymptotic infinity and therefore of the gravitational waves that propagate there, has become increasingly important for accurate modeling of waveforms. In particular, waveform models, such as post-Newtonian (PN) expressions, n... |
2406.00742 | Yurii Ignat'ev | Yu.G. Ignsat'ev and I.A. Kokh | Cosmological models based on an asymmetric scalar doublet with kinetic
coupling of components. II. Numerical modeling | 15 pages, 28 figures, 11 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical modeling of a mathematical model of the cosmological evolution of
an asymmetric scalar doublet with kinetic interaction between the components
was carried out. A wide range of values of fundamental parameters and initial
conditions of the model are considered. Various types of behavior have been
identified:... | [
{
"created": "Sun, 2 Jun 2024 13:32:03 GMT",
"version": "v1"
}
] | 2024-06-04 | [
[
"Ignsat'ev",
"Yu. G.",
""
],
[
"Kokh",
"I. A.",
""
]
] | Numerical modeling of a mathematical model of the cosmological evolution of an asymmetric scalar doublet with kinetic interaction between the components was carried out. A wide range of values of fundamental parameters and initial conditions of the model are considered. Various types of behavior have been identified: m... |
2301.05222 | Luis Gabriel Gomez Diaz PhD | Gabriel Gomez and Jose F. Rodriguez | New Non-Abelian Reissner-Nordstr\"{o}m Black Hole Solutions in the
Generalized SU(2) Proca Theory And Some Astrophysical Implications | 18 pages, 8 figures. Typos fixed, introduction extended to match
published version | Phys. Rev. D 108 (2023) 2, 024069 | 10.1103/PhysRevD.108.024069 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Generalized SU(2) Proca theory is a vector-tensor theory of gravity whose
action is invariant under global transformations of the SU(2) group and
includes second-order derivative self-interactions of the vector field beyond
the massive Yang-Mills theory. We find that the presence of two Lagrangian
pieces consisti... | [
{
"created": "Thu, 12 Jan 2023 18:59:31 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Aug 2023 01:25:18 GMT",
"version": "v2"
}
] | 2023-08-23 | [
[
"Gomez",
"Gabriel",
""
],
[
"Rodriguez",
"Jose F.",
""
]
] | The Generalized SU(2) Proca theory is a vector-tensor theory of gravity whose action is invariant under global transformations of the SU(2) group and includes second-order derivative self-interactions of the vector field beyond the massive Yang-Mills theory. We find that the presence of two Lagrangian pieces consisting... |
1811.05047 | Viqar Husain | Masooma Ali, Syed Moeez Hassan, Viqar Husain | Monte Carlo simulation of cosmologies with dust | 15 pages, 14 figures. Matches published version | Class. Quantum Grav. 36, 234002 (2019) | 10.1088/1361-6382/ab32cb | null | gr-qc hep-th physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum theory of the Friedmann cosmological model with dust and
cosmological constant ($\Lambda$) is not exactly solvable analytically. We
apply Path Integral Monte Carlo (PIMC) techniques to study its quantum dynamics
using the physical Hamiltonian corresponding to the dust field as a clock. We
study (i) quantu... | [
{
"created": "Mon, 12 Nov 2018 23:42:13 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 01:06:07 GMT",
"version": "v2"
}
] | 2020-09-10 | [
[
"Ali",
"Masooma",
""
],
[
"Hassan",
"Syed Moeez",
""
],
[
"Husain",
"Viqar",
""
]
] | The quantum theory of the Friedmann cosmological model with dust and cosmological constant ($\Lambda$) is not exactly solvable analytically. We apply Path Integral Monte Carlo (PIMC) techniques to study its quantum dynamics using the physical Hamiltonian corresponding to the dust field as a clock. We study (i) quantum ... |
gr-qc/0612150 | Bela Szilagyi | Bela Szilagyi, Denis Pollney, Luciano Rezzolla, Jonathan Thornburg,
Jeffrey Winicour | An explicit harmonic code for black-hole evolution using excision | 18 pages, 6 postscript figures, uses iopams.sty, iopart10.clo,
iopart12.clo, iopart.cls, setstack.sty | Class.Quant.Grav.24:S275-S293,2007 | 10.1088/0264-9381/24/12/S18 | null | gr-qc | null | We describe an explicit in time, finite-difference code designed to simulate
black holes by using the excision method. The code is based upon the harmonic
formulation of the Einstein equations and incorporates several features
regarding the well-posedness and numerical stability of the initial-boundary
problem for th... | [
{
"created": "Fri, 22 Dec 2006 22:38:24 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2007 19:54:30 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Szilagyi",
"Bela",
""
],
[
"Pollney",
"Denis",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Thornburg",
"Jonathan",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | We describe an explicit in time, finite-difference code designed to simulate black holes by using the excision method. The code is based upon the harmonic formulation of the Einstein equations and incorporates several features regarding the well-posedness and numerical stability of the initial-boundary problem for the ... |
gr-qc/0504032 | Marcelle Santos | M. S. Santos, S. V. B. Gon\c{c}alves, J. C. Fabris, E. M. de Gouveia
Dal Pino | Modeling the spectrum of gravitational waves in the primordial Universe | Proc. of the Conference on Magnetic Fields in the Universe: from
laboratories and stars to primordial structures, AIP(NY), eds. E. M. de
Gouveia Dal Pino, G. Lugones & A. Lazarian (2005), in press. (8 pages, 11
figures) | AIPConf.Proc.784:800-807,2005 | 10.1063/1.2077253 | null | gr-qc | null | Recent observations from type Ia Supernovae and from cosmic microwave
background (CMB) anisotropies have revealed that most of the matter of the
Universe interacts in a repulsive manner, composing the so-called dark energy
constituent of the Universe. The analysis of cosmic gravitational waves (GW)
represents, beside... | [
{
"created": "Thu, 7 Apr 2005 19:57:43 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Santos",
"M. S.",
""
],
[
"Gonçalves",
"S. V. B.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Pino",
"E. M. de Gouveia Dal",
""
]
] | Recent observations from type Ia Supernovae and from cosmic microwave background (CMB) anisotropies have revealed that most of the matter of the Universe interacts in a repulsive manner, composing the so-called dark energy constituent of the Universe. The analysis of cosmic gravitational waves (GW) represents, besides ... |
gr-qc/0110003 | Carlo Rovelli | Carlo Rovelli | GPS observables in general relativity | 6 pages, 1 figure, references added | Phys.Rev.D65:044017,2002 | 10.1103/PhysRevD.65.044017 | null | gr-qc | null | I present a complete set of gauge invariant observables, in the context of
general relativity coupled with a minimal amount of realistic matter (four
particles). These observables have a straightforward and realistic physical
interpretation. In fact, the technology to measure them is realized by the
Global Positionin... | [
{
"created": "Mon, 1 Oct 2001 07:45:47 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Oct 2001 13:38:43 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Rovelli",
"Carlo",
""
]
] | I present a complete set of gauge invariant observables, in the context of general relativity coupled with a minimal amount of realistic matter (four particles). These observables have a straightforward and realistic physical interpretation. In fact, the technology to measure them is realized by the Global Positioning ... |
2303.11353 | Ioannis Gialamas | Ioannis D. Gialamas, Kyriakos Tamvakis | Bimetric-Affine Quadratic Gravity | matches version to be published in PRD | null | 10.1103/PhysRevD.107.104012 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Bimetric gravity, is a theory of gravity that posits the existence of two
interacting and dynamical metric tensors. The spectrum of bimetric gravity
consists of a massless and a massive spin-2 particle. The form of the
interactions between the two metrics $g_{\mu\nu}$ and $f_{\mu\nu}$ is
constrained by requiring abse... | [
{
"created": "Mon, 20 Mar 2023 18:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Mar 2023 09:55:15 GMT",
"version": "v2"
},
{
"created": "Tue, 2 May 2023 12:01:48 GMT",
"version": "v3"
}
] | 2023-05-17 | [
[
"Gialamas",
"Ioannis D.",
""
],
[
"Tamvakis",
"Kyriakos",
""
]
] | Bimetric gravity, is a theory of gravity that posits the existence of two interacting and dynamical metric tensors. The spectrum of bimetric gravity consists of a massless and a massive spin-2 particle. The form of the interactions between the two metrics $g_{\mu\nu}$ and $f_{\mu\nu}$ is constrained by requiring absenc... |
gr-qc/0601114 | Kirill Bronnikov | K.A. Bronnikov, S.A. Kononogov, V.N. Melnikov | Brane world corrections to Newton's law | Brief review, 16 pages, 92 references. Some description and
references added | Gen.Rel.Grav. 38 (2006) 1215-1232 | 10.1007/s10714-006-0300-7 | null | gr-qc | null | We discuss possible variations of the effective gravitational constant with
length scale, predicted by most of alternative theories of gravity and unified
models of physical interactions. After a brief general exposition, we review in
more detail the predicted corrections to Newton's law of gravity in diverse
brane w... | [
{
"created": "Thu, 26 Jan 2006 21:31:40 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2006 13:02:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Kononogov",
"S. A.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | We discuss possible variations of the effective gravitational constant with length scale, predicted by most of alternative theories of gravity and unified models of physical interactions. After a brief general exposition, we review in more detail the predicted corrections to Newton's law of gravity in diverse brane wor... |
1603.05806 | Ying-li Zhang | Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Mukohyama,
Shinji Tsujikawa, Ying-li Zhang | Cosmology in generalized Proca theories | 23 pages, 7 figures, revised version | JCAP06(2016)048 | 10.1088/1475-7516/2016/06/048 | YITP-16-36, IPMU16-0032 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a massive vector field with derivative interactions that
propagates only the 3 desired polarizations (besides two tensor polarizations
from gravity) with second-order equations of motion in curved space-time. The
cosmological implications of such generalized Proca theories are investigated
for both the ba... | [
{
"created": "Fri, 18 Mar 2016 09:38:24 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Jul 2016 03:58:14 GMT",
"version": "v2"
}
] | 2016-07-05 | [
[
"De Felice",
"Antonio",
""
],
[
"Heisenberg",
"Lavinia",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Zhang",
"Ying-li",
""
]
] | We consider a massive vector field with derivative interactions that propagates only the 3 desired polarizations (besides two tensor polarizations from gravity) with second-order equations of motion in curved space-time. The cosmological implications of such generalized Proca theories are investigated for both the back... |
gr-qc/0004013 | Donald C. Salisbury | D. C. Salisbury, J. M. Pons, and L. C. Shepley | Gauge symmetries in Ashtekar's formulation of general relativity | Talk given at Third Conference on Constrained Dynamics and Quantum
Gravity, September, 1999. To appear in Nuclear Physics B (Proceedings
Supplement) | Nucl.Phys.Proc.Suppl. 88 (2000) 314-317 | 10.1016/S0920-5632(00)00792-1 | null | gr-qc | null | It might seem that a choice of a time coordinate in Hamiltonian formulations
of general relativity breaks the full four-dimensional diffeomorphism
covariance of the theory. This is not the case. We construct explicitly the
complete set of gauge generators for Ashtekar's formulation of canonical
gravity. The requireme... | [
{
"created": "Tue, 4 Apr 2000 20:26:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Salisbury",
"D. C.",
""
],
[
"Pons",
"J. M.",
""
],
[
"Shepley",
"L. C.",
""
]
] | It might seem that a choice of a time coordinate in Hamiltonian formulations of general relativity breaks the full four-dimensional diffeomorphism covariance of the theory. This is not the case. We construct explicitly the complete set of gauge generators for Ashtekar's formulation of canonical gravity. The requirement... |
2012.06524 | Emmanuil Saridakis | Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis | Observational constraints on Myrzakulov gravity | 24 pages, 6 figures, 2 Tables, version published in Phys.Rev.D | Phys. Rev. D 103, 104013 (2021) | 10.1103/PhysRevD.103.104013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use data from Supernovae (SNIa) Pantheon sample, from Baryonic Acoustic
Oscillations (BAO), and from cosmic chronometers measurements of the Hubble
parameter (CC), alongside arguments from Big Bang Nucleosynthesis (BBN), in
order to extract constraints on Myrzakulov $F(R,T)$ gravity. This is a
connection-based the... | [
{
"created": "Fri, 11 Dec 2020 17:40:52 GMT",
"version": "v1"
},
{
"created": "Tue, 11 May 2021 07:30:13 GMT",
"version": "v2"
}
] | 2021-05-19 | [
[
"Anagnostopoulos",
"Fotios K.",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We use data from Supernovae (SNIa) Pantheon sample, from Baryonic Acoustic Oscillations (BAO), and from cosmic chronometers measurements of the Hubble parameter (CC), alongside arguments from Big Bang Nucleosynthesis (BBN), in order to extract constraints on Myrzakulov $F(R,T)$ gravity. This is a connection-based theor... |
1910.11066 | F Shojai | S. Cheraghchi, F. Shojai | Super-horizon effects on the gauge invariant effective energy density in
f(R) gravity | 18 pages, Accepted for publication in Phys. Rev. D | Phys. Rev. D 100, 103509, (2019) | 10.1103/PhysRevD.100.103509 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we study the gauge invariant effective energy momentum tensor
for cosmological perturbations in f(R) gravity during the inflationary epoch.
Considering the super-horizon regime, we derive the effective energy density up
to the one-loop corrections. It describes the back-reaction effect of the
fluctuat... | [
{
"created": "Thu, 24 Oct 2019 13:12:03 GMT",
"version": "v1"
}
] | 2019-11-11 | [
[
"Cheraghchi",
"S.",
""
],
[
"Shojai",
"F.",
""
]
] | In this article we study the gauge invariant effective energy momentum tensor for cosmological perturbations in f(R) gravity during the inflationary epoch. Considering the super-horizon regime, we derive the effective energy density up to the one-loop corrections. It describes the back-reaction effect of the fluctuatio... |
1603.09674 | Ignazio Ciufolini | Ignazio Ciufolini, Antonio Paolozzi, Erricos C. Pavlis, Rolf Koenig,
John Ries, Vahe Gurzadyan, Richard Matzner, Roger Penrose, Giampiero Sindoni,
Claudio Paris, Harutyun Khachatryan and Sergey Mirzoyan | A Test of General Relativity Using the LARES and LAGEOS Satellites and a
GRACE Earth's Gravity Model | 13 pages, 4 figures, published on EPJ C | Eur. Phys. J. C (2016) 76:120 | 10.1140/epjc/s10052-016-3961-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a test of General Relativity, the measurement of the Earth's
dragging of inertial frames. Our result is obtained using about 3.5 years of
laser-ranged observations of the LARES, LAGEOS and LAGEOS 2 laser-ranged
satellites together with the Earth's gravity field model GGM05S produced by the
space geodesy mi... | [
{
"created": "Tue, 29 Mar 2016 17:28:53 GMT",
"version": "v1"
}
] | 2016-04-01 | [
[
"Ciufolini",
"Ignazio",
""
],
[
"Paolozzi",
"Antonio",
""
],
[
"Pavlis",
"Erricos C.",
""
],
[
"Koenig",
"Rolf",
""
],
[
"Ries",
"John",
""
],
[
"Gurzadyan",
"Vahe",
""
],
[
"Matzner",
"Richard",
""
],
... | We present a test of General Relativity, the measurement of the Earth's dragging of inertial frames. Our result is obtained using about 3.5 years of laser-ranged observations of the LARES, LAGEOS and LAGEOS 2 laser-ranged satellites together with the Earth's gravity field model GGM05S produced by the space geodesy miss... |
gr-qc/9908017 | Don Marolf | Donald Marolf | Some brane theoretic no-hair results (and their field theory duals) | 5 pages, 2 pictex figures included, for the proceedings of the 1999
Canadian Conference on General Relativity and Relativistic Astrophysics | null | 10.1063/1.1301573 | SU-GP-99/8-1 | gr-qc | null | This contribution to the proceedings of the 1999 Canadian Conference on
General Relativity and Relativistic Astrophysics is a brief exposition of
earlier work, with Sumati Surya (hep-th/9805121) Amanda Peet (hep-th/9903213),
addressing certain results in higher dimensional supergravity that are related
to black hole ... | [
{
"created": "Thu, 5 Aug 1999 18:44:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Marolf",
"Donald",
""
]
] | This contribution to the proceedings of the 1999 Canadian Conference on General Relativity and Relativistic Astrophysics is a brief exposition of earlier work, with Sumati Surya (hep-th/9805121) Amanda Peet (hep-th/9903213), addressing certain results in higher dimensional supergravity that are related to black hole no... |
1507.01943 | Shahar Hod | Shahar Hod | Universality in the relaxation dynamics of the composed
black-hole-charged-massive-scalar-field system: The role of quantum Schwinger
discharge | 8 pages | Physics Letters B 747, 339 (2015) | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quasinormal resonance spectrum $\{\omega_n(\mu,q,M,Q)\}_{n=0}^{n=\infty}$
of charged massive scalar fields in the charged Reissner-Nordstr\"om black-hole
spacetime is studied {\it analytically} in the large-coupling regime $qQ\gg
M\mu$ (here $\{\mu, q\}$ are respectively the mass and charge coupling constant
of t... | [
{
"created": "Tue, 7 Jul 2015 20:00:23 GMT",
"version": "v1"
}
] | 2015-07-09 | [
[
"Hod",
"Shahar",
""
]
] | The quasinormal resonance spectrum $\{\omega_n(\mu,q,M,Q)\}_{n=0}^{n=\infty}$ of charged massive scalar fields in the charged Reissner-Nordstr\"om black-hole spacetime is studied {\it analytically} in the large-coupling regime $qQ\gg M\mu$ (here $\{\mu, q\}$ are respectively the mass and charge coupling constant of the... |
2210.03742 | Stephen Adler | Stephen L. Adler | Galaxy formation catalyzed by gravastars and the JWST, revisited | 11 pages, final version for publication | null | null | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have proposed that galaxy formation is catalyzed by the collision of
infalling and outstreaming particles from leaky, horizonless astrophysical
black holes, most likely gravastars, and based on this gave a model for the
disk galaxy scale length. In this paper we modify our original scale length
formula by includin... | [
{
"created": "Thu, 6 Oct 2022 20:50:30 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2022 18:37:39 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Dec 2022 21:33:30 GMT",
"version": "v3"
},
{
"created": "Sat, 8 Jul 2023 20:19:53 GMT",
"version": "v4"
},
{
"crea... | 2024-06-25 | [
[
"Adler",
"Stephen L.",
""
]
] | We have proposed that galaxy formation is catalyzed by the collision of infalling and outstreaming particles from leaky, horizonless astrophysical black holes, most likely gravastars, and based on this gave a model for the disk galaxy scale length. In this paper we modify our original scale length formula by including ... |
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