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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0010028 | Mohammad Reza Setare | M. R. Setare and R. Mansouri | Casimir Effect for Spherical Shell in de Sitter Space | 9 pages, submitted to Class. Quantum Grav | Class.Quant.Grav. 18 (2001) 2331 | 10.1088/0264-9381/18/12/308 | null | gr-qc | null | The Casimir stress on a spherical shell in de Sitter background for massless
scalar field satisfying Dirichlet boundary conditions on the shell is
calculated. The metric is written in conformally flat form. Although the metric
is time dependent no particles are created. The Casimir stress is calculated
for inside and... | [
{
"created": "Sun, 8 Oct 2000 11:00:40 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2000 14:06:17 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Dec 2000 10:01:17 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Setare",
"M. R.",
""
],
[
"Mansouri",
"R.",
""
]
] | The Casimir stress on a spherical shell in de Sitter background for massless scalar field satisfying Dirichlet boundary conditions on the shell is calculated. The metric is written in conformally flat form. Although the metric is time dependent no particles are created. The Casimir stress is calculated for inside and o... |
1405.3513 | Shamaila Rani | M. Sharif and Shamaila Rani | Nonlinear Electrodynamics in $f(T)$ Gravity and Generalized Second Law
of Thermodynamics | 21 pages, 10 figures | Astrophys. Space Sci. 346(2013)573 | 10.1007/s10509-013-1480-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the nonlinear electrodynamics in the framework of
$f(T)$ gravity for FRW universe along with dust matter, magnetic and torsion
contributions. We evaluate the equation of state and deceleration parameters to
explore the accelerated expansion of the universe. The validity of generalized
second l... | [
{
"created": "Tue, 3 Dec 2013 15:05:23 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Sharif",
"M.",
""
],
[
"Rani",
"Shamaila",
""
]
] | In this paper, we study the nonlinear electrodynamics in the framework of $f(T)$ gravity for FRW universe along with dust matter, magnetic and torsion contributions. We evaluate the equation of state and deceleration parameters to explore the accelerated expansion of the universe. The validity of generalized second law... |
0804.3274 | Ian Harry | I.W. Harry, S. Fairhurst, B.S. Sathyaprakash | A hierarchical search for gravitational waves from supermassive black
hole binary mergers | 11 pages, 2 figures, for GWDAW-12 proceedings edition of CQG | Class.Quant.Grav.25:184027,2008 | 10.1088/0264-9381/25/18/184027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method to search for gravitational waves from coalescing
supermassive binary black holes in LISA data. The search utilizes the
$\mathcal{F}$-statistic to maximize over, and determine the values of, the
extrinsic parameters of the binary system. The intrinsic parameters are
searched over hierarchically us... | [
{
"created": "Mon, 21 Apr 2008 11:38:25 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 2008 11:48:41 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Harry",
"I. W.",
""
],
[
"Fairhurst",
"S.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | We present a method to search for gravitational waves from coalescing supermassive binary black holes in LISA data. The search utilizes the $\mathcal{F}$-statistic to maximize over, and determine the values of, the extrinsic parameters of the binary system. The intrinsic parameters are searched over hierarchically usin... |
1407.0938 | Nabil Youssef L | Nabil L. Youssef, Amr M. Sid-Ahmed and Ebtsam H. Taha | Gravity theory in SAP-geometry | 14 pages, References added and a reference updated, minor corrections | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of the present paper is to construct a field theory in the context of
absolute parallelism (Teleparallel) geometry under the assumption that the
canonical connection is semi-symmetric. The field equations are formulated
using a suitable Lagrangian first proposed by Mikhail and Wanas. The
mathematical and phys... | [
{
"created": "Thu, 3 Jul 2014 14:56:25 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jul 2014 15:53:53 GMT",
"version": "v2"
}
] | 2014-07-22 | [
[
"Youssef",
"Nabil L.",
""
],
[
"Sid-Ahmed",
"Amr M.",
""
],
[
"Taha",
"Ebtsam H.",
""
]
] | The aim of the present paper is to construct a field theory in the context of absolute parallelism (Teleparallel) geometry under the assumption that the canonical connection is semi-symmetric. The field equations are formulated using a suitable Lagrangian first proposed by Mikhail and Wanas. The mathematical and physic... |
2302.04738 | Ming Zhang | Ming Zhang and Jie Jiang | Strong Cosmic Censorship in accelerating spacetime | 6 pages, 2 figures, matches published version | Sci. China-Phys. Mech. Astron. 66, 280412 (2023) | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | It has been established that Strong Cosmic Censorship Conjecture (SCCC) is
respected by an asymptotically flat black hole with charge, but violated by a
charged asymptotically de Sitter black hole. We studied the instability of the
Cauchy horizon for an accelerating black hole in Einstein theory conformally
coupled w... | [
{
"created": "Thu, 9 Feb 2023 16:18:30 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jul 2023 14:59:23 GMT",
"version": "v2"
}
] | 2023-07-06 | [
[
"Zhang",
"Ming",
""
],
[
"Jiang",
"Jie",
""
]
] | It has been established that Strong Cosmic Censorship Conjecture (SCCC) is respected by an asymptotically flat black hole with charge, but violated by a charged asymptotically de Sitter black hole. We studied the instability of the Cauchy horizon for an accelerating black hole in Einstein theory conformally coupled wit... |
gr-qc/0609057 | Mikhail Kagan | Martin Bojowald, Hector H. Hern\'andez, Mikhail Kagan, Parampreet
Singh, and Aureliano Skirzewski | Hamiltonian cosmological perturbation theory with loop quantum gravity
corrections | 24 pages, 1 figure | Phys.Rev.D74:123512,2006 | 10.1103/PhysRevD.74.123512 | IGPG-06/9-7 | gr-qc astro-ph hep-ph | null | Cosmological perturbation equations are derived systematically in a canonical
scheme based on Ashtekar variables. A comparison with the covariant derivation
and various subtleties in the calculation and choice of gauges are pointed out.
Nevertheless, the treatment is more systematic when correction terms of
canonical... | [
{
"created": "Fri, 15 Sep 2006 19:59:19 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2006 21:04:05 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bojowald",
"Martin",
""
],
[
"Hernández",
"Hector H.",
""
],
[
"Kagan",
"Mikhail",
""
],
[
"Singh",
"Parampreet",
""
],
[
"Skirzewski",
"Aureliano",
""
]
] | Cosmological perturbation equations are derived systematically in a canonical scheme based on Ashtekar variables. A comparison with the covariant derivation and various subtleties in the calculation and choice of gauges are pointed out. Nevertheless, the treatment is more systematic when correction terms of canonical q... |
1904.09550 | Alessandro Nagar | Alessandro Nagar, Geraint Pratten, Gunnar Riemenschneider, and
Rossella Gamba | A Multipolar Effective One Body Model for Non-Spinning Black Hole
Binaries | 24 pages, 18 figures. Improved figures and presentation. Submitted to
Phys. Rev. D | Phys. Rev. D 101, 024041 (2020) | 10.1103/PhysRevD.101.024041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce \TEOBiResumSM{}, a nonspinning inspiral-merger-ringdown waveform
model built within the effective one body (EOB) framework that includes
gravitational waveform modes beyond the dominant quadrupole $(\ell,|m|) =
(2,2)$. The model incorporates: (i) an improved Pad\'e resummation of the
factorized waveform ... | [
{
"created": "Sun, 21 Apr 2019 07:01:24 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Nov 2019 10:52:25 GMT",
"version": "v2"
}
] | 2020-01-29 | [
[
"Nagar",
"Alessandro",
""
],
[
"Pratten",
"Geraint",
""
],
[
"Riemenschneider",
"Gunnar",
""
],
[
"Gamba",
"Rossella",
""
]
] | We introduce \TEOBiResumSM{}, a nonspinning inspiral-merger-ringdown waveform model built within the effective one body (EOB) framework that includes gravitational waveform modes beyond the dominant quadrupole $(\ell,|m|) = (2,2)$. The model incorporates: (i) an improved Pad\'e resummation of the factorized waveform am... |
0802.1201 | Emanuele Alesci | Emanuele Alesci | Tensorial Structure of the LQG graviton propagator | 4 pages,; to appear in the proceedings of the II Stueckelberg
Workshop, Int.J.Mod.Phys.A | Int.J.Mod.Phys.A23:1209-1213,2008 | 10.1142/S0217751X0804007X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the construction of the tensorial structure of the graviton
propagator in the context of loop quantum gravity and spinfoam formalism. The
main result of this analysis is that applying the same strategy used to compute
the diagonal terms, the Barrett-Crane vertex is unable to yield the correct
propagator in ... | [
{
"created": "Fri, 8 Feb 2008 18:52:34 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Alesci",
"Emanuele",
""
]
] | We review the construction of the tensorial structure of the graviton propagator in the context of loop quantum gravity and spinfoam formalism. The main result of this analysis is that applying the same strategy used to compute the diagonal terms, the Barrett-Crane vertex is unable to yield the correct propagator in th... |
1504.03305 | Antony Speranza | Antony J. Speranza | Ponderable aether | 22 pages (excluding references). Comments welcome | null | 10.1088/1475-7516/2015/08/016 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a Lorentz-violating theory of gravity where the aether vector is
taken to be nondynamical. This "ponderable aether theory" is almost the same as
Einstein-aether theory (where the aether vector is dynamical), but involves
additional integration constants arising due to the loss of initial value
constraints... | [
{
"created": "Mon, 13 Apr 2015 19:27:52 GMT",
"version": "v1"
}
] | 2015-08-19 | [
[
"Speranza",
"Antony J.",
""
]
] | We consider a Lorentz-violating theory of gravity where the aether vector is taken to be nondynamical. This "ponderable aether theory" is almost the same as Einstein-aether theory (where the aether vector is dynamical), but involves additional integration constants arising due to the loss of initial value constraints. ... |
2209.11358 | Abbas Sherif | Abbas M. Sherif and Peter K. S. Dunsby | Horizon area bound and MOTS stability in locally rotationally symmetric
solutions | Area bound of Proposition III.1 has been revised, and subsequently
affected results have been amended accordingly. Some rewriting of the texts
surrounding the MOTS stability operator has been done. This version matches
the version that has been accepted for publication in Classical and Quantum
Gravity | null | 10.1088/1361-6382/acb195 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study the stability of marginally outer trapped surfaces
(MOTS), foliating horizons of the form $r=X(\tau)$, embedded in locally
rotationally symmetric class II perfect fluid spacetimes. An upper bound on the
area of stable MOTS is obtained. It is shown that any stable MOTS of the types
considered i... | [
{
"created": "Fri, 23 Sep 2022 01:04:37 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jan 2023 13:22:25 GMT",
"version": "v2"
}
] | 2023-01-11 | [
[
"Sherif",
"Abbas M.",
""
],
[
"Dunsby",
"Peter K. S.",
""
]
] | In this paper, we study the stability of marginally outer trapped surfaces (MOTS), foliating horizons of the form $r=X(\tau)$, embedded in locally rotationally symmetric class II perfect fluid spacetimes. An upper bound on the area of stable MOTS is obtained. It is shown that any stable MOTS of the types considered in ... |
1208.1764 | Florian Kuhnel | Florian Kuhnel | On Instability of Certain Bi-Metric and Massive-Gravity Theories | 4 pages, 2 figures; v2: minor changes to match PRD version | null | 10.1103/PhysRevD.88.064024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stability about cosmological background solutions to the bi-metric
Hassan-Rosen theory is studied. The results of this analysis are presented, and
it is shown that a large class of cosmological backgrounds is classically
unstable. This sets serious doubts on the physical viability of the
Hassan-Rosen theory - and in ... | [
{
"created": "Wed, 8 Aug 2012 20:00:08 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Aug 2013 21:30:11 GMT",
"version": "v2"
}
] | 2013-09-18 | [
[
"Kuhnel",
"Florian",
""
]
] | Stability about cosmological background solutions to the bi-metric Hassan-Rosen theory is studied. The results of this analysis are presented, and it is shown that a large class of cosmological backgrounds is classically unstable. This sets serious doubts on the physical viability of the Hassan-Rosen theory - and in tu... |
2003.01542 | Cristian Armendariz-Picon | C. Armendariz-Picon | On the Expected Backreaction During Preheating | 40 pages, 10 figures. v2: Replaced with published version | null | 10.1088/1475-7516/2020/05/035 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In previous work we argued that the correct procedure to predict the
gravitational wave signal from preheating after inflation rests on the in-in
formalism. We extend here our previous analysis to include the backreaction of
the produced matter on the motion of the inflaton and the expansion of the
universe, and stud... | [
{
"created": "Mon, 2 Mar 2020 17:41:22 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2020 14:28:21 GMT",
"version": "v2"
}
] | 2020-11-26 | [
[
"Armendariz-Picon",
"C.",
""
]
] | In previous work we argued that the correct procedure to predict the gravitational wave signal from preheating after inflation rests on the in-in formalism. We extend here our previous analysis to include the backreaction of the produced matter on the motion of the inflaton and the expansion of the universe, and study ... |
gr-qc/9512014 | Vladimir Dzhunushaliev | V.D. Dzhunushaliev | Kolmogorov Algorithmic Complexity and its Probability Interpretation in
Quantum Gravity | 11 pages, REVTEX, some corrections in text | Class.Quant.Grav. 15 (1998) 603 | 10.1088/0264-9381/15/3/011 | null | gr-qc | null | The quantum gravity has great difficulties with application of the
probability notion. In given article this problem is analyzed according to
algorithmic viewpoint. According to A.N. Kolmogorov, the probability notion can
be connected with algorithmic complexity of given object. The paper proposes an
interpretation o... | [
{
"created": "Thu, 7 Dec 1995 03:41:39 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Apr 1997 02:58:09 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Dzhunushaliev",
"V. D.",
""
]
] | The quantum gravity has great difficulties with application of the probability notion. In given article this problem is analyzed according to algorithmic viewpoint. According to A.N. Kolmogorov, the probability notion can be connected with algorithmic complexity of given object. The paper proposes an interpretation of ... |
2001.02016 | Andronikos Paliathanasis | Andronikos Paliathanasis | Extended analysis for the Evolution of the Cosmological history in
Einstein-aether Scalar Field theory | 19 pages, 7 figures, new appendix, discussion improved, version
accepted for publication by Physical Review D | Phys. Rev. D 101, 064008 (2020) | 10.1103/PhysRevD.101.064008 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an Einstein-aether scalar field cosmological model where the
aether and the scalar field are interacting. The model of our consideration
consists the two different interacting models proposed in the literature by
Kanno et al. and by Donnelly et al. We perform an extended analysis for the
cosmological evol... | [
{
"created": "Tue, 7 Jan 2020 13:20:45 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2020 08:14:53 GMT",
"version": "v2"
}
] | 2020-03-11 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | We consider an Einstein-aether scalar field cosmological model where the aether and the scalar field are interacting. The model of our consideration consists the two different interacting models proposed in the literature by Kanno et al. and by Donnelly et al. We perform an extended analysis for the cosmological evolut... |
gr-qc/0411145 | Robert Beig | R.Beig, B.G.Schmidt | Relativistic Elastostatics I: Bodies in Rigid Rotation | 25 pages | Class.Quant.Grav. 22 (2005) 2249-2268 | 10.1088/0264-9381/22/11/021 | null | gr-qc | null | We consider elastic bodies in rigid rotation, both nonrelativistically and in
special relativity. Assuming a body to be in its natural state in the absence
of rotation, we prove the existence of solutions to the elastic field equations
for small angular velocity.
| [
{
"created": "Tue, 30 Nov 2004 11:19:28 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Apr 2005 07:00:57 GMT",
"version": "v2"
},
{
"created": "Thu, 19 May 2005 08:48:11 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Beig",
"R.",
""
],
[
"Schmidt",
"B. G.",
""
]
] | We consider elastic bodies in rigid rotation, both nonrelativistically and in special relativity. Assuming a body to be in its natural state in the absence of rotation, we prove the existence of solutions to the elastic field equations for small angular velocity. |
2208.10953 | Allan Alinea | Allan L. Alinea and Mark Ruel D. Chua | Extending the symmetry of the massless Klein-Gordon equation under the
general disformal transformation | 14 pages, accepted for publication in International Journal of Modern
Physics A, deleted some unimportant details, clarified that the
`orthogonality condition' does not make the field overdetermined, rewritten
parts for clarity | Int. J. Mod. Phys. A 38 01 (2023) 2350004 | 10.1142/S0217751X23500045 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Klein-Gordon equation, one of the most fundamental equations in field
theory, is known to be not invariant under conformal transformation. However,
its massless limit exhibits symmetry under Bekenstein's disformal
transformation, subject to some conditions on the disformal part of the metric
variation. In this st... | [
{
"created": "Tue, 23 Aug 2022 13:23:06 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jan 2023 01:51:21 GMT",
"version": "v2"
}
] | 2023-03-14 | [
[
"Alinea",
"Allan L.",
""
],
[
"Chua",
"Mark Ruel D.",
""
]
] | The Klein-Gordon equation, one of the most fundamental equations in field theory, is known to be not invariant under conformal transformation. However, its massless limit exhibits symmetry under Bekenstein's disformal transformation, subject to some conditions on the disformal part of the metric variation. In this stud... |
2204.05174 | Sudipta Das | Srijita Sinha, Manisha Banerjee, Sudipta Das | Perturbation in an interacting dark universe | 10 pages, 5 figures. arXiv admin note: text overlap with
arXiv:2110.02666 | Phys.Dark Univ. 42 (2023) 101273 | 10.1016/j.dark.2023.101273 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have considered an interacting model of dark energy and have
looked into the evolution of the dark sectors. By solving the perturbation
equations numerically, we have studied the imprints on the growth of matter as
well as dark energy fluctuations. It has been found that for higher rate of
interactio... | [
{
"created": "Mon, 11 Apr 2022 15:07:52 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Sinha",
"Srijita",
""
],
[
"Banerjee",
"Manisha",
""
],
[
"Das",
"Sudipta",
""
]
] | In this paper we have considered an interacting model of dark energy and have looked into the evolution of the dark sectors. By solving the perturbation equations numerically, we have studied the imprints on the growth of matter as well as dark energy fluctuations. It has been found that for higher rate of interaction ... |
1805.11042 | Everton Murilo Carvalho Abreu | E. M. C. Abreu, A. C. R. Mendes, G. Oliveira-Neto, J. Ananias Neto, L.
G. Rezende Rodrigues and M. Silva de Oliveira | Ho\v{r}ava-Lifshitz cosmological models in noncommutative space-times | 27 pages. Preprint format | null | 10.1007/s10714-019-2577-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we will analyze a noncommutative (NC) version of the
Friedmann-Robert-Walker cosmological models within the gravitational
Ho\v{r}ava-Lifshitz theory. The matter content of the models is described by a
perfect fluid and the constant curvature of the spatial sections may be
positive, negative or zero. In ... | [
{
"created": "Wed, 23 May 2018 18:50:27 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"Abreu",
"E. M. C.",
""
],
[
"Mendes",
"A. C. R.",
""
],
[
"Oliveira-Neto",
"G.",
""
],
[
"Neto",
"J. Ananias",
""
],
[
"Rodrigues",
"L. G. Rezende",
""
],
[
"de Oliveira",
"M. Silva",
""
]
] | In this work, we will analyze a noncommutative (NC) version of the Friedmann-Robert-Walker cosmological models within the gravitational Ho\v{r}ava-Lifshitz theory. The matter content of the models is described by a perfect fluid and the constant curvature of the spatial sections may be positive, negative or zero. In or... |
gr-qc/0212110 | Vladimir M. Khatsymovsky | V.M.Khatsymovsky | Area expectation values in quantum area Regge calculus | 9 pages, LaTeX, possible relation to quantisation of the usual
length-based Regge calculus is discussed | Phys.Lett. B560 (2003) 245-251 | 10.1016/S0370-2693(03)00439-8 | null | gr-qc | null | The Regge calculus generalised to independent area tensor variables is
considered. The continuous time limit is found and formal Feynman path integral
measure corresponding to the canonical quantisation is written out. The quantum
measure in the completely discrete theory is found which possesses the property
to lead... | [
{
"created": "Thu, 26 Dec 2002 18:25:27 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Dec 2002 06:36:56 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Mar 2003 08:19:28 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | The Regge calculus generalised to independent area tensor variables is considered. The continuous time limit is found and formal Feynman path integral measure corresponding to the canonical quantisation is written out. The quantum measure in the completely discrete theory is found which possesses the property to lead t... |
0709.1940 | Albert Roura | Albert Roura, Enric Verdaguer | Cosmological perturbations from stochastic gravity | 29 pages, REVTeX; minor changes, additional appendix with an
alternative proof of the equivalence between stochastic and quantum
correlation functions as well as an exact argument showing that the
correlation function of curvature perturbations remains constant in time for
superhorizon modes, which clarifies a ... | Phys.Rev.D78:064010,2008 | 10.1103/PhysRevD.78.064010 | LA-UR-07-6116 | gr-qc | null | In inflationary cosmological models driven by an inflaton field the origin of
the primordial inhomogeneities which are responsible for large scale structure
formation are the quantum fluctuations of the inflaton field. These are usually
computed using the standard theory of cosmological perturbations, where both
the ... | [
{
"created": "Wed, 12 Sep 2007 18:24:14 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Feb 2008 19:32:38 GMT",
"version": "v2"
}
] | 2009-02-20 | [
[
"Roura",
"Albert",
""
],
[
"Verdaguer",
"Enric",
""
]
] | In inflationary cosmological models driven by an inflaton field the origin of the primordial inhomogeneities which are responsible for large scale structure formation are the quantum fluctuations of the inflaton field. These are usually computed using the standard theory of cosmological perturbations, where both the gr... |
1011.4159 | Francisco Lobo | Nadiezhda Montelongo Garc\'ia, Tiberiu Harko, Francisco S. N. Lobo,
Jos\'e P. Mimoso | Energy conditions in modified Gauss-Bonnet gravity | 9 pages, 8 figures. V2: minor additions and corrections; to appear in
PRD | Phys.Rev.D83:104032,2011 | 10.1103/PhysRevD.83.104032 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In considering alternative higher-order gravity theories, one is liable to be
motivated in pursuing models consistent and inspired by several candidates of a
fundamental theory of quantum gravity. Indeed, motivations from string/M-theory
predict that scalar field couplings with the Gauss-Bonnet invariant, G, are
impo... | [
{
"created": "Thu, 18 Nov 2010 09:21:31 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Apr 2011 21:49:37 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"García",
"Nadiezhda Montelongo",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Mimoso",
"José P.",
""
]
] | In considering alternative higher-order gravity theories, one is liable to be motivated in pursuing models consistent and inspired by several candidates of a fundamental theory of quantum gravity. Indeed, motivations from string/M-theory predict that scalar field couplings with the Gauss-Bonnet invariant, G, are import... |
0812.2332 | Molin Liu | Molin Liu, Jianbo Lu, Yuanxing Gui | The Influence of Free Quintessence on Gravitational Frequency Shift and
Deflection of Light with 4D momentum | 12 pages, 2 figures, 4 tables. European Physical Journal C in press | Eur.Phys.J.C59:107-116,2009 | 10.1140/epjc/s10052-008-0800-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the 4D momentum, the influence of quintessence on the gravitational
frequency shift and the deflection of light are examined in modified
Schwarzschild space. We find that the frequency of photon depends on the state
parameter of quintessence $w_q$: the frequency increases for $-1<w_q<-1/3$ and
decreases for ... | [
{
"created": "Fri, 12 Dec 2008 10:00:43 GMT",
"version": "v1"
}
] | 2009-03-20 | [
[
"Liu",
"Molin",
""
],
[
"Lu",
"Jianbo",
""
],
[
"Gui",
"Yuanxing",
""
]
] | Based on the 4D momentum, the influence of quintessence on the gravitational frequency shift and the deflection of light are examined in modified Schwarzschild space. We find that the frequency of photon depends on the state parameter of quintessence $w_q$: the frequency increases for $-1<w_q<-1/3$ and decreases for $-... |
2006.02944 | J\'er\'emy Auffinger | Alexandre Arbey, J\'er\'emy Auffinger | Detecting Planet 9 via Hawking radiation | 15 pages, 6 figures, text completed and units corrected | null | null | null | gr-qc astro-ph.EP astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Concordant evidence points towards the existence of a ninth planet in the
Solar System at more than $400\,$AU from the Sun. In particular,
trans-Neptunian object orbits are perturbed by the presence of a putative
gravitational source. Since this planet has not yet been observationally found
with conventional telescop... | [
{
"created": "Thu, 4 Jun 2020 15:27:49 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2021 10:46:33 GMT",
"version": "v2"
}
] | 2021-01-29 | [
[
"Arbey",
"Alexandre",
""
],
[
"Auffinger",
"Jérémy",
""
]
] | Concordant evidence points towards the existence of a ninth planet in the Solar System at more than $400\,$AU from the Sun. In particular, trans-Neptunian object orbits are perturbed by the presence of a putative gravitational source. Since this planet has not yet been observationally found with conventional telescope ... |
1704.01211 | Marcony Silva Cunha | V. B. Bezerra, H. R. Christiansen, M. S. Cunha, C. R. Muniz | Exact solutions and phenomenological constraints from massive scalars in
a Gravity's Rainbow spacetime | Rewritten and enlarged version. 17 pages, 1 figure, 1 table. Some
typos corrected. Final version to appear in Phys. Rev. D | Phys. Rev. D 96, 024018 (2017) | 10.1103/PhysRevD.96.024018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the exact (confluent Heun) solutions to the massive scalar field in
a Gravity's Rainbow Schwarzschild metric. With these solutions at hand, we
study the Hawking radiation resulting from the tunneling rate through the event
horizon. We show that the emission spectrum obeys non-extensive statistics and
is hal... | [
{
"created": "Tue, 4 Apr 2017 22:48:22 GMT",
"version": "v1"
},
{
"created": "Wed, 17 May 2017 05:38:42 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Jun 2017 13:29:55 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Jul 2017 03:33:41 GMT",
"version": "v4"
}
] | 2017-07-19 | [
[
"Bezerra",
"V. B.",
""
],
[
"Christiansen",
"H. R.",
""
],
[
"Cunha",
"M. S.",
""
],
[
"Muniz",
"C. R.",
""
]
] | We obtain the exact (confluent Heun) solutions to the massive scalar field in a Gravity's Rainbow Schwarzschild metric. With these solutions at hand, we study the Hawking radiation resulting from the tunneling rate through the event horizon. We show that the emission spectrum obeys non-extensive statistics and is halte... |
2010.08254 | Orlando Luongo | Kuantay Boshkayev, Orlando Luongo, Marco Muccino | Neutrino oscillation in the $q$-metric | 2 figures, 3 tables, accepted for publication in EPJC | null | 10.1140/epjc/s10052-020-08533-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate neutrino oscillation in the field of an axially symmetric
space-time, employing the so-called $q$-metric, in the context of general
relativity. Following the standard approach, we compute the phase shift
invoking the weak and strong field limits and small deformation. To do so, we
consider neutron star... | [
{
"created": "Fri, 16 Oct 2020 09:05:19 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Boshkayev",
"Kuantay",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Muccino",
"Marco",
""
]
] | We investigate neutrino oscillation in the field of an axially symmetric space-time, employing the so-called $q$-metric, in the context of general relativity. Following the standard approach, we compute the phase shift invoking the weak and strong field limits and small deformation. To do so, we consider neutron stars,... |
1003.1973 | Sean Gryb B | Sean B. Gryb | A Definition of Background Independence | 35 pages | Class. Quantum Grav. 27 (2010) 215018 | 10.1088/0264-9381/27/21/215018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a definition for background (in)/dependence in dynamical theories
of the evolution of configurations that have a continuous symmetry and test
this definition on particle models and on gravity. Our definition draws from
Barbour's best-matching framework developed for the purpose of implementing
spatial and ... | [
{
"created": "Tue, 9 Mar 2010 20:31:40 GMT",
"version": "v1"
}
] | 2010-10-13 | [
[
"Gryb",
"Sean B.",
""
]
] | We propose a definition for background (in)/dependence in dynamical theories of the evolution of configurations that have a continuous symmetry and test this definition on particle models and on gravity. Our definition draws from Barbour's best-matching framework developed for the purpose of implementing spatial and te... |
1704.03719 | LVC Publications | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams,
P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal,
K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B.
Allen, G. Allen, A... | Search for gravitational waves from Scorpius X-1 in the first Advanced
LIGO observing run with a hidden Markov model | null | Phys. Rev. D 95, 122003 (2017); erratum Phys. Rev. D 104, 129901
(2021) | 10.1103/PhysRevD.95.122003 | LIGO-P1700019; erratum LIGO-P2100372 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results are presented from a semi-coherent search for continuous
gravitational waves from the brightest low-mass X-ray binary, Scorpius X-1,
using data collected during the first Advanced LIGO observing run (O1). The
search combines a frequency domain matched filter (Bessel-weighted
$\mathcal{F}$-statistic) with a hi... | [
{
"created": "Wed, 12 Apr 2017 12:09:44 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Apr 2017 10:50:54 GMT",
"version": "v2"
},
{
"created": "Wed, 31 May 2017 05:08:52 GMT",
"version": "v3"
}
] | 2023-03-01 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K.",
... | Results are presented from a semi-coherent search for continuous gravitational waves from the brightest low-mass X-ray binary, Scorpius X-1, using data collected during the first Advanced LIGO observing run (O1). The search combines a frequency domain matched filter (Bessel-weighted $\mathcal{F}$-statistic) with a hidd... |
2112.09832 | Takuya Katagiri | Takuya Katagiri, Masashi Kimura | The Aretakis constants and instability in general spherically symmetric
extremal black hole spacetimes: higher multipole modes, late-time tails, and
geometrical meanings | 32 pages; v2: minor revisions, accepted for publication in Phys. Rev.
D | null | 10.1103/PhysRevD.105.064062 | RUP-21-19 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study late-time behaviors of massive scalar fields in general static and
spherically symmetric extremal black hole spacetimes in arbitrary dimensions.
We show the existence of conserved quantities on the extremal black hole
horizons for specific mass squared and multipole modes of the scalar fields.
Those quantiti... | [
{
"created": "Sat, 18 Dec 2021 03:27:13 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Mar 2022 10:17:59 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Katagiri",
"Takuya",
""
],
[
"Kimura",
"Masashi",
""
]
] | We study late-time behaviors of massive scalar fields in general static and spherically symmetric extremal black hole spacetimes in arbitrary dimensions. We show the existence of conserved quantities on the extremal black hole horizons for specific mass squared and multipole modes of the scalar fields. Those quantities... |
0705.3422 | Friedrich W. Hehl | Friedrich W. Hehl (Cologne and Missouri-Columbia) and Yu.N. Obukhov
(Cologne and Moscow) | Equivalence principle and electromagnetic field: no birefringence, no
dilaton, and no axion | 13 pages latex | Gen.Rel.Grav.40:1239-1248,2008 | 10.1007/s10714-007-0601-5 | null | gr-qc hep-th physics.class-ph | null | The coupling of the electromagnetic field to gravity is discussed. In the
premetric axiomatic approach based on the experimentally well established
conservation laws of electric charge and magnetic flux, the Maxwell equations
are the same irrespective of the presence or absence of gravity. In this sense,
one can say ... | [
{
"created": "Wed, 23 May 2007 17:00:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hehl",
"Friedrich W.",
"",
"Cologne and Missouri-Columbia"
],
[
"Obukhov",
"Yu. N.",
"",
"Cologne and Moscow"
]
] | The coupling of the electromagnetic field to gravity is discussed. In the premetric axiomatic approach based on the experimentally well established conservation laws of electric charge and magnetic flux, the Maxwell equations are the same irrespective of the presence or absence of gravity. In this sense, one can say th... |
0909.5113 | Diego S\'aez-G\'omez | Olesya Gorbunova, Diego S\'aez-G\'omez | The oscillating dark energy and cosmological Casimir effect | 4 pages. Added references | Open Astron.J.3:73,2010 | 10.2174/1874381101003020073 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The role of dynamical cosmological Casimir effect to phantom (constant $w$)
and oscillating Universe is discussed. It is shown explicitly that its role is
not essential near to Big Rip singularity. However, the account of Casimir
fluid makes the scale factor approach to Rip time to be faster. Rip time itself
maybe ch... | [
{
"created": "Mon, 28 Sep 2009 15:17:46 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2010 11:46:40 GMT",
"version": "v2"
}
] | 2011-04-07 | [
[
"Gorbunova",
"Olesya",
""
],
[
"Sáez-Gómez",
"Diego",
""
]
] | The role of dynamical cosmological Casimir effect to phantom (constant $w$) and oscillating Universe is discussed. It is shown explicitly that its role is not essential near to Big Rip singularity. However, the account of Casimir fluid makes the scale factor approach to Rip time to be faster. Rip time itself maybe chan... |
1203.6366 | Astrid Eichhorn | Babette D\"obrich and Astrid Eichhorn | Can we see quantum gravity? Photons in the asymptotic-safety scenario | 29 pages, 9 figures, matches journal version in JHEP | null | 10.1007/JHEP06(2012)156 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the search for a quantum theory of gravity it is crucial to find
experimental access to quantum gravitational effects. Since these are expected
to be very small at observationally accessible scales it is advantageous to
consider processes with no tree-level contribution in the Standard Model, such
as photon-photon... | [
{
"created": "Wed, 28 Mar 2012 20:06:42 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jun 2012 19:35:26 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Döbrich",
"Babette",
""
],
[
"Eichhorn",
"Astrid",
""
]
] | In the search for a quantum theory of gravity it is crucial to find experimental access to quantum gravitational effects. Since these are expected to be very small at observationally accessible scales it is advantageous to consider processes with no tree-level contribution in the Standard Model, such as photon-photon s... |
1406.7253 | Pedro Gir\~ao | Jo\~ao L. Costa, Pedro M. Gir\~ao, Jos\'e Nat\'ario, and Jorge Drumond
Silva | On the global uniqueness for the Einstein-Maxwell-scalar field system
with a cosmological constant. Part 2: Structure of the solutions and
stability of the Cauchy horizon | 44 pages, 13 figures; v2: a few small changes; v3: a paragraph was
added in the Introduction, minor clarifications were made thoughout, the list
of references was expanded, matches final published version | null | 10.1007/s00220-015-2433-6 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is the second part of a trilogy dedicated to the following
problem: given spherically symmetric characteristic initial data for the
Einstein-Maxwell-scalar field system with a cosmological constant $\Lambda$,
with the data on the outgoing initial null hypersurface given by a subextremal
Reissner-Nordstrom ... | [
{
"created": "Fri, 27 Jun 2014 18:04:38 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jul 2014 01:20:54 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Aug 2015 17:18:49 GMT",
"version": "v3"
}
] | 2015-09-02 | [
[
"Costa",
"João L.",
""
],
[
"Girão",
"Pedro M.",
""
],
[
"Natário",
"José",
""
],
[
"Silva",
"Jorge Drumond",
""
]
] | This paper is the second part of a trilogy dedicated to the following problem: given spherically symmetric characteristic initial data for the Einstein-Maxwell-scalar field system with a cosmological constant $\Lambda$, with the data on the outgoing initial null hypersurface given by a subextremal Reissner-Nordstrom bl... |
gr-qc/0407046 | Mario La Camera | Mario La Camera | Cosmological solutions in the brane-bulk system | 14 pages, revtex4, comments added | Eur.Phys.J.C41:251-256,2005 | 10.1140/epjc/s2005-02173-5 | null | gr-qc | null | In this work we find cosmological solutions in the brane-bulk system starting
from a 5-D line element which is a simple extension, for cosmological
applications, of the pioneering Randall-Sundrum line element. From the
knowledge of the bulk metric, assumed to have the form of plane waves
propagating in the fifth dime... | [
{
"created": "Tue, 13 Jul 2004 09:55:38 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Oct 2004 17:26:55 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Nov 2004 10:49:46 GMT",
"version": "v3"
}
] | 2011-09-13 | [
[
"La Camera",
"Mario",
""
]
] | In this work we find cosmological solutions in the brane-bulk system starting from a 5-D line element which is a simple extension, for cosmological applications, of the pioneering Randall-Sundrum line element. From the knowledge of the bulk metric, assumed to have the form of plane waves propagating in the fifth dimens... |
2203.04490 | Bekir Can L\"utf\"uo\u{g}lu | B. C. L\"utf\"uo\u{g}lu, B. Hamil and L. Dahbi | Quantum corrections to the thermodynamics of rotating charged BTZ black
hole in gravity's rainbow | 12 Figures, Typos have been fixed. Missing references and information
have been fixed | Int. J. Mod. Phys. A 37 (18) 2250126 (2022) | 10.1142/S0217751X22501263 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we investigate the thermal properties of the rotating
charged BTZ black hole under the gravity's rainbow (GR) and generalized
uncertainty principle (GUP) formalism. At first, we study the GR-corrected
thermal quantities according to the usual Heisenberg algebra. Then, we consider
a deformed algebr... | [
{
"created": "Wed, 9 Mar 2022 02:19:58 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jun 2022 11:55:56 GMT",
"version": "v2"
}
] | 2023-01-02 | [
[
"Lütfüoğlu",
"B. C.",
""
],
[
"Hamil",
"B.",
""
],
[
"Dahbi",
"L.",
""
]
] | In this manuscript, we investigate the thermal properties of the rotating charged BTZ black hole under the gravity's rainbow (GR) and generalized uncertainty principle (GUP) formalism. At first, we study the GR-corrected thermal quantities according to the usual Heisenberg algebra. Then, we consider a deformed algebra ... |
gr-qc/9912027 | Frank Gronwald | B. Mashhoon, F. Gronwald and H.I.M. Lichtenegger | Gravitomagnetism and the Clock Effect | 27 pages, LaTeX, submitted to Proc. Bad Honnef Meeting on: GYROS,
CLOCKS, AND INTERFEROMETERS: TESTING GENERAL RELATIVITY IN SPACE (22 - 27
August 1999; Bad Honnef, Germany) | Lect.Notes Phys. 562 (2001) 83-108 | 10.1007/3-540-40988-2_5 | null | gr-qc | null | The main theoretical aspects of gravitomagnetism are reviewed. It is shown
that the gravitomagnetic precession of a gyroscope is intimately connected with
the special temporal structure around a rotating mass that is revealed by the
gravitomagnetic clock effect. This remarkable effect, which involves the
difference i... | [
{
"created": "Wed, 8 Dec 1999 09:45:54 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Mashhoon",
"B.",
""
],
[
"Gronwald",
"F.",
""
],
[
"Lichtenegger",
"H. I. M.",
""
]
] | The main theoretical aspects of gravitomagnetism are reviewed. It is shown that the gravitomagnetic precession of a gyroscope is intimately connected with the special temporal structure around a rotating mass that is revealed by the gravitomagnetic clock effect. This remarkable effect, which involves the difference in ... |
0909.1101 | Justin Corvino | Piotr T. Chru\'sciel, Justin Corvino, James Isenberg | Construction of N-body time-symmetric initial data sets in general
relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given a collection of N asymptotically Euclidean ends with zero scalar
curvature, we construct a Riemannian manifold with zero scalar curvature and
one asymptotically Euclidean end, whose boundary has a neighborhood isometric
to the disjoint union of a specified collection of sub-regions of the given
ends. An applica... | [
{
"created": "Sun, 6 Sep 2009 18:41:46 GMT",
"version": "v1"
}
] | 2009-09-08 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Corvino",
"Justin",
""
],
[
"Isenberg",
"James",
""
]
] | Given a collection of N asymptotically Euclidean ends with zero scalar curvature, we construct a Riemannian manifold with zero scalar curvature and one asymptotically Euclidean end, whose boundary has a neighborhood isometric to the disjoint union of a specified collection of sub-regions of the given ends. An applicati... |
1412.4672 | Davood Momeni Dr | D. Momeni, M. J. S. Houndjo, E. G\"udekli, M. E. Rodrigues, F. G.
Alvarenga, R. Myrzakulov | Spherically symmetric solutions of light Galileon | Accepted in "International Journal of Theoretical Physics" | Int.J.Theor.Phys. 55 (2016) no.2, 1211-1221 | 10.1007/s10773-015-2762-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have been studied the model of light Galileon with translational shift
symmetry $\phi\to \phi+c$. The matter Lagrangian is presented in the form
$\mathcal{L}_{\phi}= -\eta (\partial \phi)^2+\beta
G^{\mu\nu}\partial_{\mu}\phi\partial_{\nu}\phi$. We have been addressed two
issues: the first is that, we have been pro... | [
{
"created": "Sat, 6 Dec 2014 13:45:42 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2015 14:46:44 GMT",
"version": "v2"
}
] | 2018-10-09 | [
[
"Momeni",
"D.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Güdekli",
"E.",
""
],
[
"Rodrigues",
"M. E.",
""
],
[
"Alvarenga",
"F. G.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | We have been studied the model of light Galileon with translational shift symmetry $\phi\to \phi+c$. The matter Lagrangian is presented in the form $\mathcal{L}_{\phi}= -\eta (\partial \phi)^2+\beta G^{\mu\nu}\partial_{\mu}\phi\partial_{\nu}\phi$. We have been addressed two issues: the first is that, we have been prove... |
gr-qc/9610066 | Christoph Schiller | Christoph Schiller | Does matter differ from vacuum? | 23 pages, LaTeX, one postscript figure in separate file (a raw latex
sketch of the figure is available by deleting a \comment{} command in the tex
file.) | null | null | null | gr-qc | null | A structured collection of thought provoking conclusions about space and time
is given. Using only the Compton wavelength lambda = hbar / m c and the
Schwarzschild radius r_s = 2 G m / c^2, it is argued that neither the
continuity of space-time nor the concepts of space-point, instant, or point
particle have experime... | [
{
"created": "Mon, 28 Oct 1996 20:41:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schiller",
"Christoph",
""
]
] | A structured collection of thought provoking conclusions about space and time is given. Using only the Compton wavelength lambda = hbar / m c and the Schwarzschild radius r_s = 2 G m / c^2, it is argued that neither the continuity of space-time nor the concepts of space-point, instant, or point particle have experiment... |
gr-qc/0207075 | Michael Edmund Tobar | C. R. Locke, M. E. Tobar, E. N. Ivanov | Properties of a monolithic sapphire parametric transducer: prospects of
measuring the standard quantum limit | One PDF | Class.Quant.Grav.19:1877-1888,2002 | 10.1088/0264-9381/19/7/388 | null | gr-qc | null | To measure the standard quantum limit (SQL) a high quality transducer must be
coupled to a high quality mechanical system. Due to its monolithic nature, the
monolithic sapphire transducer (MST) has high quality factors for both types of
resonances. Single loop suspension is shown to yield a mechanical quality
factor ... | [
{
"created": "Fri, 19 Jul 2002 12:33:52 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Locke",
"C. R.",
""
],
[
"Tobar",
"M. E.",
""
],
[
"Ivanov",
"E. N.",
""
]
] | To measure the standard quantum limit (SQL) a high quality transducer must be coupled to a high quality mechanical system. Due to its monolithic nature, the monolithic sapphire transducer (MST) has high quality factors for both types of resonances. Single loop suspension is shown to yield a mechanical quality factor of... |
2004.02840 | Indrani Banerjee | Subhadip Sau, Indrani Banerjee, Soumitra SenGupta | Imprints of the Janis-Newman-Winicour spacetime on observations related
to shadow and accretion | 32 pages, 4 new figures added; accepted for publication in Physical
Review D | Phys. Rev. D 102, 064027 (2020) | 10.1103/PhysRevD.102.064027 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The final fate of gravitational collapse of massive stars has been a subject
of interest for a long time since such a collapse may lead to black holes and
naked singularities alike. Since, the formation of naked singularities is
forbidden by the cosmic censorship conjecture, exploring their observational
differences ... | [
{
"created": "Mon, 6 Apr 2020 17:35:13 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 12:28:41 GMT",
"version": "v2"
}
] | 2020-09-16 | [
[
"Sau",
"Subhadip",
""
],
[
"Banerjee",
"Indrani",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | The final fate of gravitational collapse of massive stars has been a subject of interest for a long time since such a collapse may lead to black holes and naked singularities alike. Since, the formation of naked singularities is forbidden by the cosmic censorship conjecture, exploring their observational differences fr... |
1605.06021 | Sudipto Roy | Sudipto Roy, Dibyajyoti Laha, Argho Aranya Sangma, Indrani Pal | A Study on the Expanding Universe Based on a Model of the Time Variation
of its Matter Content in the Framework of Brans-Dicke Theory | 14 pages, 8 figures | International Journal of Current Research, Volume 8, Issue 5,
pages 32251-32259, 2016 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A theoretical model of cosmic expansion has been formulated on an assumption
of inter-conversion of matter and dark energy, in the framework of Brans-Dicke
theory. An empirical scale factor has been used, which generates a signature
flip of the deceleration parameter with time. To account for the
non-conservation of ... | [
{
"created": "Fri, 13 May 2016 20:44:13 GMT",
"version": "v1"
}
] | 2017-11-07 | [
[
"Roy",
"Sudipto",
""
],
[
"Laha",
"Dibyajyoti",
""
],
[
"Sangma",
"Argho Aranya",
""
],
[
"Pal",
"Indrani",
""
]
] | A theoretical model of cosmic expansion has been formulated on an assumption of inter-conversion of matter and dark energy, in the framework of Brans-Dicke theory. An empirical scale factor has been used, which generates a signature flip of the deceleration parameter with time. To account for the non-conservation of ma... |
2112.10567 | Miren Radia | Miren Radia, Ulrich Sperhake, Amelia Drew, Katy Clough, Pau Figueras,
Eugene A. Lim, Justin L. Ripley, Josu C. Aurrekoetxea, Tiago Fran\c{c}a and
Thomas Helfer | Lessons for adaptive mesh refinement in numerical relativity | 46 pages, 10 figures, to match version published in CQG | Class. Quantum Grav. 39 (2022) 135006 | 10.1088/1361-6382/ac6fa9 | KCL-PH-TH/2021-89 | gr-qc astro-ph.HE hep-ph | http://creativecommons.org/licenses/by/4.0/ | We demonstrate the flexibility and utility of the Berger-Rigoutsos Adaptive
Mesh Refinement (AMR) algorithm used in the open-source numerical relativity
code GRChombo for generating gravitational waveforms from binary black-hole
inspirals, and for studying other problems involving non-trivial matter
configurations. W... | [
{
"created": "Mon, 20 Dec 2021 14:40:42 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Dec 2021 09:36:23 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Jun 2022 13:07:28 GMT",
"version": "v3"
}
] | 2022-06-22 | [
[
"Radia",
"Miren",
""
],
[
"Sperhake",
"Ulrich",
""
],
[
"Drew",
"Amelia",
""
],
[
"Clough",
"Katy",
""
],
[
"Figueras",
"Pau",
""
],
[
"Lim",
"Eugene A.",
""
],
[
"Ripley",
"Justin L.",
""
],
[
"Aur... | We demonstrate the flexibility and utility of the Berger-Rigoutsos Adaptive Mesh Refinement (AMR) algorithm used in the open-source numerical relativity code GRChombo for generating gravitational waveforms from binary black-hole inspirals, and for studying other problems involving non-trivial matter configurations. We ... |
gr-qc/0202031 | Mark J. Hadley | Mark J Hadley | The orientability of spacetime | 5 Pages plus 3 figures. More explanations added as requested by
referees. Figures enhanced | Class.Quant.Grav. 19 (2002) 4565-4572 | 10.1088/0264-9381/19/17/308 | null | gr-qc quant-ph | null | Contrary to established beliefs, spacetime may not be time-orientable. By
considering an experimental test of time orientability it is shown that a
failure of time-orientability of a spacetime region would be indistinguishable
from a particle antiparticle annihilation event.
| [
{
"created": "Fri, 8 Feb 2002 20:31:57 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Feb 2002 15:25:35 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Apr 2002 22:40:53 GMT",
"version": "v3"
},
{
"created": "Sun, 23 Jun 2002 17:15:56 GMT",
"version": "v4"
}
] | 2009-11-07 | [
[
"Hadley",
"Mark J",
""
]
] | Contrary to established beliefs, spacetime may not be time-orientable. By considering an experimental test of time orientability it is shown that a failure of time-orientability of a spacetime region would be indistinguishable from a particle antiparticle annihilation event. |
2110.07502 | Emmanuel Tassone | Emmanuel A. Tassone, Paula A. Mandrilli, Carlos N. Kozameh, Gonzalo D.
Quiroga, and Jos\'e I. Nieva | Numerical evolution of the center of mass and angular momentum for
binaries black holes | Pages: 12. Figures:22 | PY - 2021/10/07 VL - 104 IS - 8 | 10.1103/PhysRevD.104.084038 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The asymptotic approach derived by Kozameh-Quiroga (K-Q) provides a modern
framework to obtain the evolution of global variables of isolated sources of
gravitational radiation. We test the K-Q formalism evolving the equations of
motion for the center of mass, the intrinsic angular momentum, and several
other global v... | [
{
"created": "Thu, 14 Oct 2021 16:20:21 GMT",
"version": "v1"
}
] | 2021-10-15 | [
[
"Tassone",
"Emmanuel A.",
""
],
[
"Mandrilli",
"Paula A.",
""
],
[
"Kozameh",
"Carlos N.",
""
],
[
"Quiroga",
"Gonzalo D.",
""
],
[
"Nieva",
"José I.",
""
]
] | The asymptotic approach derived by Kozameh-Quiroga (K-Q) provides a modern framework to obtain the evolution of global variables of isolated sources of gravitational radiation. We test the K-Q formalism evolving the equations of motion for the center of mass, the intrinsic angular momentum, and several other global var... |
gr-qc/0105115 | Don Marolf | Donald Marolf | Branes, Charge and Intersections | 7 pages, no figures, latex. This brief summary of lectures given at
the Fourth Mexican School on Gravitation and Mathematical Physics was written
for the associated proceedings | Rev.Mex.Fis. 49S1 (2003) 11-13 | null | null | gr-qc | null | This is a brief summary of lectures given at the Fourth Mexican School on
Gravitation and Mathematical Physics. The lectures gave an introduction to
branes in eleven-dimensional supergravity and in type IIA supergravities in
ten-dimensions. Charge conservation and the role of the so-called `Chern-Simons
terms' were e... | [
{
"created": "Wed, 30 May 2001 14:00:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Marolf",
"Donald",
""
]
] | This is a brief summary of lectures given at the Fourth Mexican School on Gravitation and Mathematical Physics. The lectures gave an introduction to branes in eleven-dimensional supergravity and in type IIA supergravities in ten-dimensions. Charge conservation and the role of the so-called `Chern-Simons terms' were emp... |
gr-qc/9306029 | Martinez | Claus Kiefer and Erik A. Martinez | On time and the quantum-to-classical transition in Jordan-Brans-Dicke
quantum gravity | 10 pages, Latex, ZU-TH 15/93, BUTP-93/15 | Class.Quant.Grav.10:2511-2518,1993 | 10.1088/0264-9381/10/12/010 | null | gr-qc astro-ph hep-th | null | Any quantum theory of gravity which treats the gravitational constant as a
dynamical variable has to address the issue of superpositions of states
corresponding to different eigenvalues. We show how the unobservability of such
superpositions can be explained through the interaction with other
gravitational degrees of... | [
{
"created": "Thu, 24 Jun 1993 12:17:44 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Kiefer",
"Claus",
""
],
[
"Martinez",
"Erik A.",
""
]
] | Any quantum theory of gravity which treats the gravitational constant as a dynamical variable has to address the issue of superpositions of states corresponding to different eigenvalues. We show how the unobservability of such superpositions can be explained through the interaction with other gravitational degrees of f... |
2403.18661 | William Benoit | Ethan Marx, William Benoit, Alec Gunny, Rafia Omer, Deep Chatterjee,
Ricco C. Venterea, Lauren Wills, Muhammed Saleem, Eric Moreno, Ryan Raikman,
Ekaterina Govorkova, Dylan Rankin, Michael W. Coughlin, Philip Harris, and
Erik Katsavounidis | A machine-learning pipeline for real-time detection of gravitational
waves from compact binary coalescences | null | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The promise of multi-messenger astronomy relies on the rapid detection of
gravitational waves at very low latencies ($\mathcal{O}$(1\,s)) in order to
maximize the amount of time available for follow-up observations. In recent
years, neural-networks have demonstrated robust non-linear modeling
capabilities and millise... | [
{
"created": "Wed, 27 Mar 2024 15:04:15 GMT",
"version": "v1"
}
] | 2024-03-28 | [
[
"Marx",
"Ethan",
""
],
[
"Benoit",
"William",
""
],
[
"Gunny",
"Alec",
""
],
[
"Omer",
"Rafia",
""
],
[
"Chatterjee",
"Deep",
""
],
[
"Venterea",
"Ricco C.",
""
],
[
"Wills",
"Lauren",
""
],
[
"Sale... | The promise of multi-messenger astronomy relies on the rapid detection of gravitational waves at very low latencies ($\mathcal{O}$(1\,s)) in order to maximize the amount of time available for follow-up observations. In recent years, neural-networks have demonstrated robust non-linear modeling capabilities and milliseco... |
1809.09633 | Jose Natario | Pedro M. Gir\~ao, Jos\'e Nat\'ario, Jorge Drumond Silva | Solutions of the wave equation bounded at the Big Bang | 11 pages, 1 figure; v2: minor changes; v3: references updated,
matches final published version | Class. Quantum Grav. 36 (2019) 075016 | 10.1088/1361-6382/ab09b2 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By solving a singular initial value problem, we prove the existence of
solutions of the wave equation $\Box_g\phi=0$ which are bounded at the Big Bang
in the Friedmann-Lemaitre-Robertson-Walker cosmological models. More precisely,
we show that given any function $A \in H^3(\Sigma)$ (where
$\Sigma=\mathbb{R}^n, \mathb... | [
{
"created": "Tue, 25 Sep 2018 18:00:11 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Feb 2019 09:31:28 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Mar 2019 08:23:38 GMT",
"version": "v3"
}
] | 2019-03-19 | [
[
"Girão",
"Pedro M.",
""
],
[
"Natário",
"José",
""
],
[
"Silva",
"Jorge Drumond",
""
]
] | By solving a singular initial value problem, we prove the existence of solutions of the wave equation $\Box_g\phi=0$ which are bounded at the Big Bang in the Friedmann-Lemaitre-Robertson-Walker cosmological models. More precisely, we show that given any function $A \in H^3(\Sigma)$ (where $\Sigma=\mathbb{R}^n, \mathbb{... |
gr-qc/0405118 | Irina Radinschi | Irina Radinschi ("Gh. Asachi" Technical University, Romania) and
I-Ching Yang (National Taitung University, Republic of China) | On the Energy of Stringy Black Holes | LaTex | New Developments in String Theory Research, ed. Susan A. Grece,
Nova Science Publishers, Inc New York, U.S.A., 2005, ISBN: 1-59454-488-3 | null | null | gr-qc | null | It is well-known that one of the most interesting and challenging problems of
General Relativity is the energy and momentum localization. There are many
attempts to evaluate the energy distribution in a general relativistic system.
One of the methods used for the energy and momentum localization is the one
which used... | [
{
"created": "Mon, 24 May 2004 07:48:24 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jun 2004 07:22:21 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Jun 2004 10:18:20 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Radinschi",
"Irina",
"",
"\"Gh. Asachi\" Technical University, Romania"
],
[
"Yang",
"I-Ching",
"",
"National Taitung University, Republic of China"
]
] | It is well-known that one of the most interesting and challenging problems of General Relativity is the energy and momentum localization. There are many attempts to evaluate the energy distribution in a general relativistic system. One of the methods used for the energy and momentum localization is the one which used t... |
2003.14255 | Craig J. Hogan | Craig Hogan | Cosmological Constant in Coherent Quantum Gravity | null | null | 10.1142/S0218271820420043 | FERMILAB-PUB-20-100-A | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued that quantum states of geometry, like those of particles, should
be coherent on light cones of any size. An exact classical solution, the
gravitational shock wave of a relativistic point particle, is used to estimate
gravitational drag from coherent energy flows, and the expected gravitational
effect of ... | [
{
"created": "Tue, 31 Mar 2020 14:44:15 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Hogan",
"Craig",
""
]
] | It is argued that quantum states of geometry, like those of particles, should be coherent on light cones of any size. An exact classical solution, the gravitational shock wave of a relativistic point particle, is used to estimate gravitational drag from coherent energy flows, and the expected gravitational effect of vi... |
gr-qc/9712100 | Mr. SS Xulu | S. S. Xulu | Tolman's energy of a stringy charged black hole | 8 pages, RevTex, no figures | Int.J.Theor.Phys.37:1773-1778,1998 | 10.1023/A:1026600910525 | null | gr-qc | null | Virbhadra and Parikh studied the energy distribution associated with stringy
charged black hole in Einstein's prescription. We study the same using Tolman's
energy-momentum complex and get the same result as obtained by Virbhadra and
Parikh. The entire energy is confined inside the black hole.
| [
{
"created": "Wed, 31 Dec 1997 08:26:43 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Xulu",
"S. S.",
""
]
] | Virbhadra and Parikh studied the energy distribution associated with stringy charged black hole in Einstein's prescription. We study the same using Tolman's energy-momentum complex and get the same result as obtained by Virbhadra and Parikh. The entire energy is confined inside the black hole. |
gr-qc/9607043 | null | Fran\c{c}ois Goy | Aberration and the Question of Equivalence of some Ether Theories to
Special Relativity | 9 pages, Latex, 2 figures already included in the main file | Found. Phys. Lett. 9 No 2 (1996) 165-174 | 10.1007/BF02186259 | null | gr-qc | null | In the last two decades, theories explaining the same experiments as well as
special relativity does, were developed by using different synchronization
procedures. All of them are ether-like theories. Most authors believe these
theories to be equivalent to special relativity, but no general proof was ever
brought. By... | [
{
"created": "Sat, 20 Jul 1996 11:54:18 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Goy",
"François",
""
]
] | In the last two decades, theories explaining the same experiments as well as special relativity does, were developed by using different synchronization procedures. All of them are ether-like theories. Most authors believe these theories to be equivalent to special relativity, but no general proof was ever brought. By m... |
2202.10801 | Fidel F. Villase\~nor | Miguel \'Angel Javaloyes, Miguel S\'anchez and Fidel F. Villase\~nor | On the significance of the stress-energy tensor in Finsler spacetimes | 40 pages. Footnotes 5 and 6 are added with respect to the published
version | Universe 2022, 8(2), 93. Special issue "Beyond Riemannian geometry
in classical and quantum gravity" | 10.3390/universe8020093 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the physical arguments which lead to the definition of the
stress-energy tensor $T$ in the Lorentz-Finsler setting $(M,L)$ starting at
classical Relativity. Both the standard heuristic approach using fluids and the
Lagrangian one are taken into account. In particular, we argue that the
Finslerian breaking ... | [
{
"created": "Tue, 22 Feb 2022 10:40:48 GMT",
"version": "v1"
}
] | 2022-02-23 | [
[
"Javaloyes",
"Miguel Ángel",
""
],
[
"Sánchez",
"Miguel",
""
],
[
"Villaseñor",
"Fidel F.",
""
]
] | We revisit the physical arguments which lead to the definition of the stress-energy tensor $T$ in the Lorentz-Finsler setting $(M,L)$ starting at classical Relativity. Both the standard heuristic approach using fluids and the Lagrangian one are taken into account. In particular, we argue that the Finslerian breaking of... |
2110.15922 | Lorena Maga\~na Zertuche | Lorena Maga\~na Zertuche, Keefe Mitman, Neev Khera, Leo C. Stein,
Michael Boyle, Nils Deppe, Fran\c{c}ois H\'ebert, Dante A. B. Iozzo, Lawrence
E. Kidder, Jordan Moxon, Harald P. Pfeiffer, Mark A. Scheel, Saul A.
Teukolsky, William Throwe, and Nils Vu | High Precision Ringdown Modeling: Multimode Fits and BMS Frames | 17 + 2 pages, 11 figures, 2 tables | Phys. Rev. D 105, 104015 (2022) | 10.1103/PhysRevD.105.104015 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasi-normal mode (QNM) modeling is an invaluable tool for characterizing
remnant black holes, studying strong gravity, and testing GR. Only recently
have QNM studies begun to focus on multimode fitting to numerical relativity
(NR) strain waveforms. As GW observatories become even more sensitive they will
be able to ... | [
{
"created": "Fri, 29 Oct 2021 17:16:46 GMT",
"version": "v1"
},
{
"created": "Wed, 11 May 2022 17:06:40 GMT",
"version": "v2"
}
] | 2022-05-12 | [
[
"Zertuche",
"Lorena Magaña",
""
],
[
"Mitman",
"Keefe",
""
],
[
"Khera",
"Neev",
""
],
[
"Stein",
"Leo C.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Deppe",
"Nils",
""
],
[
"Hébert",
"François",
""
],
[
... | Quasi-normal mode (QNM) modeling is an invaluable tool for characterizing remnant black holes, studying strong gravity, and testing GR. Only recently have QNM studies begun to focus on multimode fitting to numerical relativity (NR) strain waveforms. As GW observatories become even more sensitive they will be able to re... |
1402.1121 | Sergey Paston | A.A. Sheykin, S.A. Paston | The approach to gravity as a theory of embedded surface | LaTeX, 10 pages. Proceedings of "II Russian-Spanish Congress Particle
and Nuclear Physics at all Scales and Cosmology", Saint-Petersburg, October
1-4, 2013 | AIP Conference Proceedings 1606, 400 (2014) | 10.1063/1.4891157 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the approach to gravity in which our curved spacetime is considered
as a surface in a flat ambient space of higher dimension (the embedding
theory). The dynamical variable in this theory is not a metric but an embedding
function. The Euler-Lagrange equations for this theory (Regge-Teitelboim
equations) are m... | [
{
"created": "Wed, 5 Feb 2014 18:34:45 GMT",
"version": "v1"
}
] | 2014-09-02 | [
[
"Sheykin",
"A. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | We study the approach to gravity in which our curved spacetime is considered as a surface in a flat ambient space of higher dimension (the embedding theory). The dynamical variable in this theory is not a metric but an embedding function. The Euler-Lagrange equations for this theory (Regge-Teitelboim equations) are mor... |
2009.13565 | Martin Bojowald | Martin Bojowald | Black-hole models in loop quantum gravity | 38 pages, 7 figures, published in special issue "Universe: 5th
Anniversary" | Universe 6 (2020) 125 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical black-hole scenarios have been developed in loop quantum gravity in
various ways, combining results from mini and midisuperspace models. In the
past, the underlying geometry of space-time has often been expressed in terms
of line elements with metric components that differ from the classical
solutions of ge... | [
{
"created": "Mon, 28 Sep 2020 18:27:10 GMT",
"version": "v1"
}
] | 2020-09-30 | [
[
"Bojowald",
"Martin",
""
]
] | Dynamical black-hole scenarios have been developed in loop quantum gravity in various ways, combining results from mini and midisuperspace models. In the past, the underlying geometry of space-time has often been expressed in terms of line elements with metric components that differ from the classical solutions of gene... |
1809.06054 | Marko Sossich | Petar Pavlovi\'c and Marko Sossich | The effect of vacuum polarization on the magnetic fields around a
Schwarzschild black hole | 6 pages, 2 figures | Phys. Rev. D 99, 024011 (2019) | 10.1103/PhysRevD.99.024011 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is a well known result that the effect of vacuum polarization in
gravitational fields will lead to a non-minimal coupling between gravity and
electromagnetism. We investigate this phenomenon further by considering the
description of static magnetic field around a Schwarzschild black hole. It is
found that close to... | [
{
"created": "Mon, 17 Sep 2018 07:44:19 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Oct 2018 12:24:05 GMT",
"version": "v2"
}
] | 2019-01-10 | [
[
"Pavlović",
"Petar",
""
],
[
"Sossich",
"Marko",
""
]
] | It is a well known result that the effect of vacuum polarization in gravitational fields will lead to a non-minimal coupling between gravity and electromagnetism. We investigate this phenomenon further by considering the description of static magnetic field around a Schwarzschild black hole. It is found that close to t... |
2005.03859 | Katsuki Aoki | Katsuki Aoki, Mohammad Ali Gorji, and Shinji Mukohyama | A consistent theory of $D\rightarrow 4$ Einstein-Gauss-Bonnet gravity | 8 pages, no figures, published version | null | 10.1016/j.physletb.2020.135843 | YITP-20-66, IPMU20-0050 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the $D\rightarrow 4$ limit of the $D$-dimensional
Einstein-Gauss-Bonnet gravity, where the limit is taken with
$\tilde{\alpha}=(D-4)\, \alpha$ kept fixed and $\alpha$ is the original
Gauss-Bonnet coupling. Using the ADM decomposition in $D$ dimensions, we
clarify that the limit is rather subtle and amb... | [
{
"created": "Fri, 8 May 2020 05:14:37 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2020 01:33:40 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Oct 2020 02:37:42 GMT",
"version": "v3"
}
] | 2020-10-12 | [
[
"Aoki",
"Katsuki",
""
],
[
"Gorji",
"Mohammad Ali",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | We investigate the $D\rightarrow 4$ limit of the $D$-dimensional Einstein-Gauss-Bonnet gravity, where the limit is taken with $\tilde{\alpha}=(D-4)\, \alpha$ kept fixed and $\alpha$ is the original Gauss-Bonnet coupling. Using the ADM decomposition in $D$ dimensions, we clarify that the limit is rather subtle and ambig... |
2108.06989 | Pramit Rej | Piyali Bhar and Pramit Rej | Stable and self consistent charged gravastar model within the framework
of $f(R,\,T)$ gravity | 23 Pages, 10 Figures, Accepted for publication in European Physical
Journal C on 12.08.2021 | Eur. Phys. J. C 81, 763 (2021) | 10.1140/epjc/s10052-021-09548-0 | null | gr-qc astro-ph.GA astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we discuss the configuration of a gravastar (gravitational
vacuum stars) in the context of $f(R, \,T )$ gravity by employing the
Mazur-Mottola conjecture [P. Mazur and E. Mottola, Report No. LA-UR-01-5067; P.
Mazur and E. Mottola, Proc. Natl. Acad. Sci. USA $101$, $9545$ ($2004$)].
Gravastar is conceptu... | [
{
"created": "Mon, 16 Aug 2021 09:37:21 GMT",
"version": "v1"
}
] | 2021-08-26 | [
[
"Bhar",
"Piyali",
""
],
[
"Rej",
"Pramit",
""
]
] | In this work, we discuss the configuration of a gravastar (gravitational vacuum stars) in the context of $f(R, \,T )$ gravity by employing the Mazur-Mottola conjecture [P. Mazur and E. Mottola, Report No. LA-UR-01-5067; P. Mazur and E. Mottola, Proc. Natl. Acad. Sci. USA $101$, $9545$ ($2004$)]. Gravastar is conceptual... |
2001.00863 | Daniela P\'erez | Daniela P\'erez, Gustavo E. Romero | Astrophysical Constraints on Strong Modified Gravity | In: Topics on Strong Gravity: A Modern View on Theories and
Experiments. C\'esar Augusto Zen Vasconcellos (Ed.). World Scientific, 2020,
pp. 19-65 | null | 10.1142/11186 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We offer a discussion on the strong field regime predictions of two families
of theories that deviate from General Relativity in different aspects:
$f(R)$-gravity and Scalar-Tensor-Vector Gravity (STVG). We discuss
astrophysical effects in models based upon both matter and vacuum solutions of
such theories. In partic... | [
{
"created": "Fri, 3 Jan 2020 15:38:42 GMT",
"version": "v1"
}
] | 2020-01-06 | [
[
"Pérez",
"Daniela",
""
],
[
"Romero",
"Gustavo E.",
""
]
] | We offer a discussion on the strong field regime predictions of two families of theories that deviate from General Relativity in different aspects: $f(R)$-gravity and Scalar-Tensor-Vector Gravity (STVG). We discuss astrophysical effects in models based upon both matter and vacuum solutions of such theories. In particul... |
gr-qc/9902077 | Alfredo Macias | Eckehard W. Mielke, Alfredo Macias (UAM-Iztapalapa) | Chiral supergravity and anomalies | Plain Latex 25 pages, no figures. to appear in Annalen der Physik
(Leipzig) 1999 | Annalen Phys. 8 (1999) 301-317 | 10.1002/(SICI)1521-3889(199904)8:4<301::AID-ANDP301>3.0.CO;2-2 | UAM-I 9902028 | gr-qc | null | Similarily as in the Ashtekar approach, the translational Chern-Simons term
is, as a generating function, instrumental for a chiral reformulation of simple
(N=1) supergravity. After applying the algebraic Cartan relation between spin
and torsion, the resulting canonical transformation induces not only
decomposition o... | [
{
"created": "Wed, 24 Feb 1999 00:55:18 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Mielke",
"Eckehard W.",
"",
"UAM-Iztapalapa"
],
[
"Macias",
"Alfredo",
"",
"UAM-Iztapalapa"
]
] | Similarily as in the Ashtekar approach, the translational Chern-Simons term is, as a generating function, instrumental for a chiral reformulation of simple (N=1) supergravity. After applying the algebraic Cartan relation between spin and torsion, the resulting canonical transformation induces not only decomposition of ... |
2403.15867 | Adnan Malik | Adnan Malik, Aimen Rauf, Kazuharu Bamba, M. Farasat Shamir | Change of the sign of the Hubble parameter and its stability in
higher-order torsion gravity | 21 pages, 22 figures, Submitted for publication | null | null | FU-PCG-134 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore the change in the sign of the Hubble parameter in the early
universe and its stability in higher-order torsion gravity. Our study explores
the various scenarios involving the sub-relativistic universe, radiation
universe, ultra-relativistic universe, dust universe, and stiff fluid universe.
Different analy... | [
{
"created": "Sat, 23 Mar 2024 15:31:12 GMT",
"version": "v1"
}
] | 2024-03-26 | [
[
"Malik",
"Adnan",
""
],
[
"Rauf",
"Aimen",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Shamir",
"M. Farasat",
""
]
] | We explore the change in the sign of the Hubble parameter in the early universe and its stability in higher-order torsion gravity. Our study explores the various scenarios involving the sub-relativistic universe, radiation universe, ultra-relativistic universe, dust universe, and stiff fluid universe. Different analyti... |
2304.07761 | Anshuman Baruah | Anshuman Baruah and Ali \"Ovg\"un and Atri Deshamukhya | Quasinormal Modes and Bounding Greybody Factors of GUP-corrected Black
Holes in Kalb-Ramond Gravity | null | Annals of Physics 455, 169393 (2023) | 10.1016/j.aop.2023.169393 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The vacuum expectation value of the non-minimally coupled Kalb-Ramond (KR)
field leads to spontaneous local Lorentz symmetry violation, and static
spherically symmetric solutions exist. In this study, we study the quasinormal
modes (QNMs) of modified black holes in non--minimally coupled KR gravity. We
employ a highe... | [
{
"created": "Sun, 16 Apr 2023 12:26:05 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jun 2023 16:57:05 GMT",
"version": "v2"
}
] | 2023-06-27 | [
[
"Baruah",
"Anshuman",
""
],
[
"Övgün",
"Ali",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | The vacuum expectation value of the non-minimally coupled Kalb-Ramond (KR) field leads to spontaneous local Lorentz symmetry violation, and static spherically symmetric solutions exist. In this study, we study the quasinormal modes (QNMs) of modified black holes in non--minimally coupled KR gravity. We employ a higher-... |
gr-qc/0107081 | Patrice Hello | Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard, Philippe
Canitrot, Fabien Cavalier, Michel Davier, Patrice Hello and Thierry Pradier | Detection in coincidence of gravitational wave bursts with a network of
interferometric detectors (I): Geometric acceptance and timing | low resolution figure 1 due to file size problems | Phys.Rev. D65 (2002) 042004 | 10.1103/PhysRevD.65.042004 | null | gr-qc | null | Detecting gravitational wave bursts (characterised by short durations and
poorly modelled waveforms) requires to have coincidences between several
interferometric detectors in order to reject non-stationary noise events. As
the wave amplitude seen in a detector depends on its location with respect to
the source direc... | [
{
"created": "Wed, 25 Jul 2001 09:25:26 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Arnaud",
"Nicolas",
""
],
[
"Barsuglia",
"Matteo",
""
],
[
"Bizouard",
"Marie-Anne",
""
],
[
"Canitrot",
"Philippe",
""
],
[
"Cavalier",
"Fabien",
""
],
[
"Davier",
"Michel",
""
],
[
"Hello",
"Patrice",
""... | Detecting gravitational wave bursts (characterised by short durations and poorly modelled waveforms) requires to have coincidences between several interferometric detectors in order to reject non-stationary noise events. As the wave amplitude seen in a detector depends on its location with respect to the source directi... |
1909.09452 | Sergey Yu. Vernov | Emilio Elizalde, Ekaterina O. Pozdeeva, Sergey Yu. Vernov | Reconstruction Procedure for Nonlocal Gauss-Bonnet Models | 5 pages | Int. J. Mod. Phys. A 35 (2020) 2040045 | 10.1142/S0217751X2040045X | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological dynamics of nonlocally corrected gravity
involving a function of the inverse d'Alembertian acting on the Gauss-Bonnet
term. Casting the dynamical equations in local form, we derive the
reconstruction procedure. We find conditions on the model parameters that are
sufficient for the exis... | [
{
"created": "Fri, 20 Sep 2019 12:27:02 GMT",
"version": "v1"
}
] | 2020-03-12 | [
[
"Elizalde",
"Emilio",
""
],
[
"Pozdeeva",
"Ekaterina O.",
""
],
[
"Vernov",
"Sergey Yu.",
""
]
] | We investigate the cosmological dynamics of nonlocally corrected gravity involving a function of the inverse d'Alembertian acting on the Gauss-Bonnet term. Casting the dynamical equations in local form, we derive the reconstruction procedure. We find conditions on the model parameters that are sufficient for the existe... |
1609.02038 | Saurya Das | Saurya Das, Gabor Kunstatter | The central role of symmetry in physics | Invited review article for the Journal of Applied and Fundamental
Sciences (Assam Don Bosco University, India). Minor changes. References added | Journal of Applied and Fundamental Sciences (Assam Don Bosco
University, India), Vol.2(2), 69-77 (2016) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetime and internal symmetries can be used to severely restrict the form
of the equations for the fundamental laws of physics. The success of this
approach in the context of general relativity and particle physics motivates
the conjecture that symmetries may help us to one day uncover the ultimate
theory that prov... | [
{
"created": "Tue, 6 Sep 2016 05:38:48 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Sep 2016 18:37:22 GMT",
"version": "v2"
}
] | 2017-02-16 | [
[
"Das",
"Saurya",
""
],
[
"Kunstatter",
"Gabor",
""
]
] | Spacetime and internal symmetries can be used to severely restrict the form of the equations for the fundamental laws of physics. The success of this approach in the context of general relativity and particle physics motivates the conjecture that symmetries may help us to one day uncover the ultimate theory that provid... |
1404.3273 | Supriya Pan | Supriya Pan and Subenoy Chakraborty | Will there be future deceleration? A study of particle creation
mechanism in non-equilibrium thermodynamics | 12 pages, 12 figures, More discussions added, references updated | Adv.High Energy Phys. 2015 (2015) 654025 | 10.1155/2015/654025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with non-equilibrium thermodynamics based on adiabatic
particle creation mechanism with the motivation of considering it as an
alternative choice to explain the recent observed accelerating phase of the
universe. Using Friedmann equations, it is shown that the deceleration
parameter ($q$) can be obtai... | [
{
"created": "Sat, 12 Apr 2014 09:59:17 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Apr 2015 06:48:31 GMT",
"version": "v2"
}
] | 2015-04-14 | [
[
"Pan",
"Supriya",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The paper deals with non-equilibrium thermodynamics based on adiabatic particle creation mechanism with the motivation of considering it as an alternative choice to explain the recent observed accelerating phase of the universe. Using Friedmann equations, it is shown that the deceleration parameter ($q$) can be obtaine... |
2011.08715 | Jakub K\'aninsk\'y | Jakub K\'aninsk\'y | Models of Discrete Linear Evolution for Quantum Systems | 47 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Discrete canonical evolution is a key tool for understanding the dynamics in
discrete models of spacetime, in particular those represented by a triangular
Regge lattice. We consider a finite-dimensional system whose evolution is
realized by a series of discrete-time evolution steps governed by Hamiltonian
equations o... | [
{
"created": "Tue, 17 Nov 2020 15:41:42 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Káninský",
"Jakub",
""
]
] | Discrete canonical evolution is a key tool for understanding the dynamics in discrete models of spacetime, in particular those represented by a triangular Regge lattice. We consider a finite-dimensional system whose evolution is realized by a series of discrete-time evolution steps governed by Hamiltonian equations of ... |
gr-qc/0204077 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia, Y.Jack NG, Hendrik Van Dam | Anomalous particle-production thresholds through systematic and
non-systematic quantum-gravity effects | 10 pages, LaTex | Astropart.Phys.19:729-738,2003 | 10.1016/S0927-6505(03)00136-1 | null | gr-qc | null | A growing number of studies is being devoted to the identification of
plausible quantum properties of spacetime which might give rise to observably
large effects. The literature on this subject is now relatively large,
including studies in string theory, loop quantum gravity and noncommutative
geometry. It is useful ... | [
{
"created": "Wed, 24 Apr 2002 17:43:53 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"NG",
"Y. Jack",
""
],
[
"Van Dam",
"Hendrik",
""
]
] | A growing number of studies is being devoted to the identification of plausible quantum properties of spacetime which might give rise to observably large effects. The literature on this subject is now relatively large, including studies in string theory, loop quantum gravity and noncommutative geometry. It is useful to... |
gr-qc/0408054 | Mauricio Bellini | Jose Edgar Madriz Aguilar (IFM, UMSNH) and Mauricio Bellini (Mar del
Plata University & CONICET) | Extra force and extra mass from noncompact Kaluza-Klein theory in a
cosmological model | final version to be published in EPJC | Eur.Phys.J.C42:349,2005 | 10.1140/epjc/s2005-02295-8 | null | gr-qc astro-ph hep-ph hep-th | null | Using the Hamilton-Jacobi formalism, we study extra force and extra mass in a
recently introduced noncompact Kaluza-Klein cosmological model. We examine the
inertial 4D mass $m_0$ of the inflaton field on a 4D FRW bulk in two examples.
We find that $m_0$ has a geometrical origin and antigravitational effects on a
non... | [
{
"created": "Tue, 17 Aug 2004 18:31:27 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2004 19:41:50 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Feb 2005 22:56:05 GMT",
"version": "v3"
},
{
"created": "Fri, 13 May 2005 14:07:51 GMT",
"version": "v4"
},
{
"c... | 2008-11-26 | [
[
"Aguilar",
"Jose Edgar Madriz",
"",
"IFM, UMSNH"
],
[
"Bellini",
"Mauricio",
"",
"Mar del\n Plata University & CONICET"
]
] | Using the Hamilton-Jacobi formalism, we study extra force and extra mass in a recently introduced noncompact Kaluza-Klein cosmological model. We examine the inertial 4D mass $m_0$ of the inflaton field on a 4D FRW bulk in two examples. We find that $m_0$ has a geometrical origin and antigravitational effects on a non i... |
gr-qc/0610056 | Mike Berger | Jang Young Bang and Micheal S. Berger | Quantum Mechanics and the Generalized Uncertainty Principle | 8 pages, 3 figures (added references) | Phys.Rev.D74:125012,2006 | 10.1103/PhysRevD.74.125012 | IUHET-501 | gr-qc | null | The generalized uncertainty principle has been described as a general
consequence of incorporating a minimal length from a theory of quantum gravity.
We consider a simple quantum mechanical model where the operator corresponding
to position has discrete eigenvalues and show how the generalized uncertainty
principle r... | [
{
"created": "Wed, 11 Oct 2006 15:36:09 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2006 19:00:28 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bang",
"Jang Young",
""
],
[
"Berger",
"Micheal S.",
""
]
] | The generalized uncertainty principle has been described as a general consequence of incorporating a minimal length from a theory of quantum gravity. We consider a simple quantum mechanical model where the operator corresponding to position has discrete eigenvalues and show how the generalized uncertainty principle res... |
1107.1092 | Jorma Louko | Jorma Louko, Eric Martinez-Pascual | Constraint rescaling in refined algebraic quantisation: momentum
constraint | 26 pages. v2: minor clarifications and corrections | J. Math. Phys. 52, 123504 (2011) | 10.1063/1.3664336 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate refined algebraic quantisation within a family of classically
equivalent constrained Hamiltonian systems that are related to each other by
rescaling a momentum-type constraint. The quantum constraint is implemented by
a rigging map that is motivated by group averaging but has a resolution finer
than wh... | [
{
"created": "Wed, 6 Jul 2011 10:54:36 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2011 18:57:55 GMT",
"version": "v2"
}
] | 2011-12-08 | [
[
"Louko",
"Jorma",
""
],
[
"Martinez-Pascual",
"Eric",
""
]
] | We investigate refined algebraic quantisation within a family of classically equivalent constrained Hamiltonian systems that are related to each other by rescaling a momentum-type constraint. The quantum constraint is implemented by a rigging map that is motivated by group averaging but has a resolution finer than what... |
1310.3938 | Judy Kupferman | Judy Kupferman | Curvature independence of statistical entropy | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the statistical number of states, from which statistical entropy
can be derived, and we show that it is an explicit function of the metric and
thus observer dependent. We find a constraint on a transformation of the metric
that preserves the number of states but does not preserve curvature. In showing
exac... | [
{
"created": "Tue, 15 Oct 2013 07:27:01 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jul 2014 15:20:24 GMT",
"version": "v2"
}
] | 2014-07-22 | [
[
"Kupferman",
"Judy",
""
]
] | We examine the statistical number of states, from which statistical entropy can be derived, and we show that it is an explicit function of the metric and thus observer dependent. We find a constraint on a transformation of the metric that preserves the number of states but does not preserve curvature. In showing exactl... |
0912.2510 | Khaled Saaidi | A. Aghmohammadi, Kh. Saaidi, M. R. Abolhassani and A. Vajdi | Standard Cosmological Evolution in f(R) Model to Kaluza Klein Cosmology | 12 pages | Phys. Scripta 80: 065008 (2009) | 10.1088/0031-8949/80/06/065008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, using $f(R)$ theory of gravity we explicitly calculate
cosmological evolution in the presence of a perfect fluid source in four and
five dimensional, space time in which this cosmological evolution in
self-creation is presented by Reddy et al 2009 Int. J. Theor. Phys. 48 10. An
exact cosmological model... | [
{
"created": "Sun, 13 Dec 2009 15:30:52 GMT",
"version": "v1"
}
] | 2014-01-20 | [
[
"Aghmohammadi",
"A.",
""
],
[
"Saaidi",
"Kh.",
""
],
[
"Abolhassani",
"M. R.",
""
],
[
"Vajdi",
"A.",
""
]
] | In this paper, using $f(R)$ theory of gravity we explicitly calculate cosmological evolution in the presence of a perfect fluid source in four and five dimensional, space time in which this cosmological evolution in self-creation is presented by Reddy et al 2009 Int. J. Theor. Phys. 48 10. An exact cosmological model i... |
2404.00895 | Muhammad Sharif | M. Sharif, M. Zeeshan Gul and Nusrat Fatima | Analysis of Bouncing Cosmology in Non-Riemannian Geometry | 23 pages, 8 figures | New Astronomy 109(2024)102211 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main objective of this manuscript is to investigate the bouncing
cosmology in the background of $f(\mathcal{Q})$ gravity, where $\mathcal{Q}$
defines the non-metricity. For this purpose, we use the reconstruction approach
and consider a flat Friedmann-Robertson-Walker spacetime with perfect matter
configuration. ... | [
{
"created": "Mon, 1 Apr 2024 03:44:09 GMT",
"version": "v1"
}
] | 2024-04-02 | [
[
"Sharif",
"M.",
""
],
[
"Gul",
"M. Zeeshan",
""
],
[
"Fatima",
"Nusrat",
""
]
] | The main objective of this manuscript is to investigate the bouncing cosmology in the background of $f(\mathcal{Q})$ gravity, where $\mathcal{Q}$ defines the non-metricity. For this purpose, we use the reconstruction approach and consider a flat Friedmann-Robertson-Walker spacetime with perfect matter configuration. We... |
2406.05820 | Syed Masood | Syed Masood, Said Mikki | An information geometric probe for charged black holes in 4D
Einstein-Gauss-Bonnet gravity | 15 pages, 9 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)] have recently proposed a
consistent model of Einstein-Gauss-Bonnet modified gravity in four spacetime
dimensions. This model predicts significant contributions of the Gauss-Bonnet
coupling parameter $\alpha$ to gravitational dynamics, while circumventing the
Lovelo... | [
{
"created": "Sun, 9 Jun 2024 15:13:55 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Masood",
"Syed",
""
],
[
"Mikki",
"Said",
""
]
] | Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)] have recently proposed a consistent model of Einstein-Gauss-Bonnet modified gravity in four spacetime dimensions. This model predicts significant contributions of the Gauss-Bonnet coupling parameter $\alpha$ to gravitational dynamics, while circumventing the Lovelock... |
1908.10152 | Dimitry Ayzenberg | Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh
Nampalliwar | RELXILL_NK: A Black Hole Relativistic Reflection Model for Testing
General Relativity | 8 Pages, 2 figures, 2 tables. Conference proceedings based on a talk
given at the meeting "Recent Progress in Relativistic Astrophysics" (6-8 May
2019, Shanghai, China). Content overlap with arXiv:1902.09665 | null | 10.3390/proceedings2019017007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we briefly present RELXILL_NK, the first and currently only
readily available model of the relativistic reflection spectrum of black hole
accretion disks that includes non-Kerr solutions for the black hole spacetime,
thus allowing for tests of the Kerr hypothesis and GR. RELXILL_NK makes use of
a gener... | [
{
"created": "Tue, 27 Aug 2019 12:05:56 GMT",
"version": "v1"
}
] | 2021-11-24 | [
[
"Abdikamalov",
"Askar B.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Nampalliwar",
"Sourabh",
""
]
] | In this paper, we briefly present RELXILL_NK, the first and currently only readily available model of the relativistic reflection spectrum of black hole accretion disks that includes non-Kerr solutions for the black hole spacetime, thus allowing for tests of the Kerr hypothesis and GR. RELXILL_NK makes use of a general... |
gr-qc/9810064 | Jorge L. Cervantes-Cota | J.L. Cervantes-Cota, P. Ag. Chauvet | Can induced gravity isotropize Bianchi I, V, or IX Universes? | 24 pages, 5 figures, to be published in Phys. Rev. D15 | Phys.Rev. D59 (1999) 043501 | 10.1103/PhysRevD.59.043501 | null | gr-qc | null | We analyze if Bianchi I, V, and IX models in the Induced Gravity (IG) theory
can evolve to a Friedmann--Roberson--Walker (FRW) expansion due to the
non--minimal coupling of gravity and the scalar field. The analytical results
that we found for the Brans-Dicke (BD) theory are now applied to the IG theory
which has $\o... | [
{
"created": "Tue, 20 Oct 1998 15:12:32 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cervantes-Cota",
"J. L.",
""
],
[
"Chauvet",
"P. Ag.",
""
]
] | We analyze if Bianchi I, V, and IX models in the Induced Gravity (IG) theory can evolve to a Friedmann--Roberson--Walker (FRW) expansion due to the non--minimal coupling of gravity and the scalar field. The analytical results that we found for the Brans-Dicke (BD) theory are now applied to the IG theory which has $\ome... |
1105.3709 | Norbert Bodendorfer | Norbert Bodendorfer, Thomas Thiemann, Andreas Thurn | Towards Loop Quantum Supergravity (LQSG) I. Rarita-Schwinger Sector | 43 pages. v2: Journal version. Some nonessential sign errors in
sections 2 and 3 corrected. Minor clarifications and corrections | Class. Quantum Grav. 30 (2013) 045006 | 10.1088/0264-9381/30/4/045006 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In our companion papers, we managed to derive a connection formulation of
Lorentzian General Relativity in D+1 dimensions with compact gauge group
SO(D+1) such that the connection is Poisson commuting, which implies that Loop
Quantum Gravity quantisation methods apply. We also provided the coupling to
standard matter... | [
{
"created": "Wed, 18 May 2011 18:25:11 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2013 19:14:13 GMT",
"version": "v2"
}
] | 2013-02-13 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Thiemann",
"Thomas",
""
],
[
"Thurn",
"Andreas",
""
]
] | In our companion papers, we managed to derive a connection formulation of Lorentzian General Relativity in D+1 dimensions with compact gauge group SO(D+1) such that the connection is Poisson commuting, which implies that Loop Quantum Gravity quantisation methods apply. We also provided the coupling to standard matter. ... |
1209.3488 | Stoytcho Yazadjiev | S. Yazadjiev | Kaluza-Klein rotating multi-black hole configurations with
electromagnetic field in Einstein-Maxwell-dilaton gravity | 7 papges | null | 10.1103/PhysRevD.86.107504 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new solution in 5D Einstein-Maxwell-dilaton gravity describing
an equilibrium configuration of extremal rotating black holes with lens space
horizon topologies. The basic properties of the solution are investigated and
the basic physical quantities are calculated. It is shown that the black hole
horizons... | [
{
"created": "Sun, 16 Sep 2012 14:25:33 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Yazadjiev",
"S.",
""
]
] | We present a new solution in 5D Einstein-Maxwell-dilaton gravity describing an equilibrium configuration of extremal rotating black holes with lens space horizon topologies. The basic properties of the solution are investigated and the basic physical quantities are calculated. It is shown that the black hole horizons a... |
2305.16193 | Pasquale Bosso | Pasquale Bosso, Giuseppe Gaetano Luciano, Luciano Petruzziello, Fabian
Wagner | 30 years in: Quo vadis generalized uncertainty principle? | 38 pages. Accepted for publication in Classical and Quantum Gravity,
"Special Issue: Focus on Quantum Gravity Phenomenology in the Multi-Messenger
Era: Challenges and Perspectives" | Class.Quant.Grav. 40 (2023) 19, 195014 | 10.1088/1361-6382/acf021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to a number of arguments in quantum gravity, both model-dependent
and model-independent, Heisenberg's uncertainty principle is modified when
approaching the Planck scale. This deformation is attributed to the existence
of a minimal length. The ensuing models have found entry into the literature
under the te... | [
{
"created": "Thu, 25 May 2023 15:53:30 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Aug 2023 09:34:52 GMT",
"version": "v2"
}
] | 2023-10-30 | [
[
"Bosso",
"Pasquale",
""
],
[
"Luciano",
"Giuseppe Gaetano",
""
],
[
"Petruzziello",
"Luciano",
""
],
[
"Wagner",
"Fabian",
""
]
] | According to a number of arguments in quantum gravity, both model-dependent and model-independent, Heisenberg's uncertainty principle is modified when approaching the Planck scale. This deformation is attributed to the existence of a minimal length. The ensuing models have found entry into the literature under the term... |
2101.12488 | Alexei Nurmagambetov | A.M. Arslanaliev and A.J. Nurmagambetov | Scattering on Quasi-Spherical Black-Holes: Features and Beyond | 33 pages, 9 figures, 2 tables. Invited paper published in "Beyond the
Standard Models of Physics and Cosmology", special issue of Physics edited by
M.Yu. Khlopov | Physics 2021, 3(1), 17-41 | 10.3390/physics3010004 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Recent developments in the gravitational waves interferometry require more
pertinent theoretical models of gravitational waves generation and propagation.
Untouched possible mechanisms of spin-2 spacetime perturbations production, we
will consider their subsequent scattering on other black holes (BHs).
Specifically, ... | [
{
"created": "Fri, 29 Jan 2021 09:32:27 GMT",
"version": "v1"
}
] | 2021-02-01 | [
[
"Arslanaliev",
"A. M.",
""
],
[
"Nurmagambetov",
"A. J.",
""
]
] | Recent developments in the gravitational waves interferometry require more pertinent theoretical models of gravitational waves generation and propagation. Untouched possible mechanisms of spin-2 spacetime perturbations production, we will consider their subsequent scattering on other black holes (BHs). Specifically, we... |
2208.02607 | Jan Ambjorn | Jan Ambjorn and Yoshiyuki Watabiki | The large scale structure of the Universe from a modified Friedmann
equation | null | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have already shown how a modified Friedmann equation, originating from a
model of the Universe built from a certain $W_3$ algebra, is able to explainthe
difference between the Hubble constants extracted from CMB data and from local
measurements. In this article we show that the same model also describes
aspects of... | [
{
"created": "Wed, 3 Aug 2022 14:19:28 GMT",
"version": "v1"
}
] | 2022-08-05 | [
[
"Ambjorn",
"Jan",
""
],
[
"Watabiki",
"Yoshiyuki",
""
]
] | We have already shown how a modified Friedmann equation, originating from a model of the Universe built from a certain $W_3$ algebra, is able to explainthe difference between the Hubble constants extracted from CMB data and from local measurements. In this article we show that the same model also describes aspects of t... |
gr-qc/0106019 | Miroslav Pardy | Miroslav Pardy | Deflection of light by the screw dislocation in space-time | 6 p | null | null | null | gr-qc | null | We derive the light deflection caused by the screw dislocation in space-time.
The derivation is based on the idea that space-time is a medium which can be
deformed by gravity and that the deformation of space-time is equivalent to the
existence of gravity.
| [
{
"created": "Wed, 6 Jun 2001 10:18:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pardy",
"Miroslav",
""
]
] | We derive the light deflection caused by the screw dislocation in space-time. The derivation is based on the idea that space-time is a medium which can be deformed by gravity and that the deformation of space-time is equivalent to the existence of gravity. |
0909.1160 | Sigbjorn Hervik | A Coley and S Hervik | Higher dimensional bivectors and classification of the Weyl operator | 25 pages; v2: some notation changed, typos fixed; CQG accepted | Class.Quant.Grav.27:015002,2010 | 10.1088/0264-9381/27/1/015002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the bivector formalism in higher dimensional Lorentzian
spacetimes. We define the Weyl bivector operator in a manner consistent with
its boost-weight decomposition. We then algebraically classify the Weyl tensor,
which gives rise to a refinement in dimensions higher than four of the usual
alignment (boost-... | [
{
"created": "Mon, 7 Sep 2009 08:21:14 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Nov 2009 11:52:02 GMT",
"version": "v2"
}
] | 2010-01-06 | [
[
"Coley",
"A",
""
],
[
"Hervik",
"S",
""
]
] | We develop the bivector formalism in higher dimensional Lorentzian spacetimes. We define the Weyl bivector operator in a manner consistent with its boost-weight decomposition. We then algebraically classify the Weyl tensor, which gives rise to a refinement in dimensions higher than four of the usual alignment (boost-we... |
2001.08833 | Abhay Ashtekar | Abhay Ashtekar | Black Hole evaporation: A Perspective from Loop Quantum Gravity | 25 pages, 8 Figures. Invited article for a special issue "Probing New
Physics with Black Holes", edited by Aurelien Barrau | Universe , 6, 21 (2020) (22 pages) | 10.3390/universe6020021 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A personal perspective on the black hole evaporation process is presented
using as guidelines inputs from: (i) loop quantum gravity, (ii) simplified
models where concrete results have been obtained, and, (iii) semi-classical
quantum general relativity. On the one hand, the final picture is conservative
in that there ... | [
{
"created": "Thu, 23 Jan 2020 22:21:26 GMT",
"version": "v1"
}
] | 2021-01-14 | [
[
"Ashtekar",
"Abhay",
""
]
] | A personal perspective on the black hole evaporation process is presented using as guidelines inputs from: (i) loop quantum gravity, (ii) simplified models where concrete results have been obtained, and, (iii) semi-classical quantum general relativity. On the one hand, the final picture is conservative in that there ar... |
2402.15327 | Araceli Soler Oficial | David Brizuela, Marco de Cesare and Araceli Soler Oficial | Perturbations of bimetric gravity on most general spherically symmetric
spacetimes | For a better clarity, some notation has been changed. Matches the
published version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a formalism to study linear perturbations of bimetric gravity on
any spherically symmetric background, including dynamical spacetimes. The setup
is based on the Gerlach-Sengupta formalism for general relativity. Each of the
two background metrics is written as a warped product between a two-dimensional
Lor... | [
{
"created": "Fri, 23 Feb 2024 13:46:52 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2024 14:41:08 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Jul 2024 07:07:34 GMT",
"version": "v3"
}
] | 2024-07-02 | [
[
"Brizuela",
"David",
""
],
[
"de Cesare",
"Marco",
""
],
[
"Oficial",
"Araceli Soler",
""
]
] | We present a formalism to study linear perturbations of bimetric gravity on any spherically symmetric background, including dynamical spacetimes. The setup is based on the Gerlach-Sengupta formalism for general relativity. Each of the two background metrics is written as a warped product between a two-dimensional Loren... |
gr-qc/9901030 | Wolfgang Drechsler | Wolfgang Drechsler (MPI for Physics, Munich, Germany) | Mass-Generation by Weyl-Symmetry Breaking | LaTex, revtex, 36 pages | Found.Phys. 29 (1999) 1327-1369 | 10.1023/A:1018805108859 | MPI-PhT/98-68 | gr-qc hep-th | null | A massless electroweak theory for leptons is formulated in a Weyl space, W_4,
yielding a Weyl invariant gauge dynamics allowing for conformal rescalings of
the metric and all fields with nonvanishing Weyl weight together with the
corresponding transformations of the Weyl vector fields representing the D(1)
or dilatat... | [
{
"created": "Mon, 11 Jan 1999 17:22:07 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Drechsler",
"Wolfgang",
"",
"MPI for Physics, Munich, Germany"
]
] | A massless electroweak theory for leptons is formulated in a Weyl space, W_4, yielding a Weyl invariant gauge dynamics allowing for conformal rescalings of the metric and all fields with nonvanishing Weyl weight together with the corresponding transformations of the Weyl vector fields representing the D(1) or dilatatio... |
gr-qc/0407108 | Carlos F. Sopuerta | Andrea Passamonti, Marco Bruni, Leonardo Gualtieri, Carlos F. Sopuerta | Coupling of radial and non-radial oscillations of relativistic stars:
gauge-invariant formalism | 23 pages, no figures, RevTeX 4.0. Minor changes to fit the version to
appear in PRD | Phys.Rev. D71 (2005) 024022 | 10.1103/PhysRevD.71.024022 | null | gr-qc astro-ph | null | Linear perturbation theory is appropriate to describe small oscillations of
stars, while a mild non-linearity is still tractable perturbatively but
requires to consider mode coupling. It is natural to start to look at this
problem by considering the coupling between linear radial and non-radial modes.
Radial pulsatio... | [
{
"created": "Wed, 28 Jul 2004 20:23:16 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jan 2005 18:17:09 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Passamonti",
"Andrea",
""
],
[
"Bruni",
"Marco",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | Linear perturbation theory is appropriate to describe small oscillations of stars, while a mild non-linearity is still tractable perturbatively but requires to consider mode coupling. It is natural to start to look at this problem by considering the coupling between linear radial and non-radial modes. Radial pulsations... |
1610.08850 | Suddhasattwa Brahma | Martin Bojowald and Suddhasattwa Brahma | Signature change in 2-dimensional black-hole models of loop quantum
gravity | 18 pages | Phys. Rev. D 98, 026012 (2018) | 10.1103/PhysRevD.98.026012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Signature change has been identified as a generic consequence of holonomy
modifications in spherically symmetric models of loop quantum gravity with real
connections, which includes modified Schwarzschild solutions. Here, this result
is extended to 2-dimensional dilaton models and to different choices of
canonical va... | [
{
"created": "Thu, 27 Oct 2016 15:51:31 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Bojowald",
"Martin",
""
],
[
"Brahma",
"Suddhasattwa",
""
]
] | Signature change has been identified as a generic consequence of holonomy modifications in spherically symmetric models of loop quantum gravity with real connections, which includes modified Schwarzschild solutions. Here, this result is extended to 2-dimensional dilaton models and to different choices of canonical vari... |
gr-qc/0006036 | Tony Rothman | Tony Rothman | Nonthermal nature of extremal Kerr black holes | Latex file, 8 pages This post corrects several misprints | Phys.Lett. A273 (2000) 303-309 | 10.1016/S0375-9601(00)00515-6 | null | gr-qc | null | Liberati, Rothman and Sonego have recently showed that objects collapsing
into extremal Reissner-Nordstrom black holes do not behave as thermal objects
at any time in their history. In particular, a temperature, and hence
thermodynamic entropy, are undefined for them. I demonstrate that the analysis
goes through esse... | [
{
"created": "Mon, 12 Jun 2000 10:23:32 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Mar 2001 17:03:23 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Rothman",
"Tony",
""
]
] | Liberati, Rothman and Sonego have recently showed that objects collapsing into extremal Reissner-Nordstrom black holes do not behave as thermal objects at any time in their history. In particular, a temperature, and hence thermodynamic entropy, are undefined for them. I demonstrate that the analysis goes through essent... |
gr-qc/0011032 | Andrzej Krolak | Andrzej Krolak and Massimo Tinto | Resampled random processes in gravitational-wave data analysis | 7 pages | Phys.Rev. D63 (2001) 107101 | 10.1103/PhysRevD.63.107101 | null | gr-qc | null | The detection of continuous gravitational-wave signals requires to account
for the motion of the detector with respect to the solar system barycenter in
the data analysis. In order to search efficiently for such signals by means of
the fast Fourier transform the data needs to be transformed from the
topocentric time ... | [
{
"created": "Wed, 8 Nov 2000 09:43:07 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Nov 2000 10:47:28 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Krolak",
"Andrzej",
""
],
[
"Tinto",
"Massimo",
""
]
] | The detection of continuous gravitational-wave signals requires to account for the motion of the detector with respect to the solar system barycenter in the data analysis. In order to search efficiently for such signals by means of the fast Fourier transform the data needs to be transformed from the topocentric time to... |
2303.05870 | Robert Beig | Robert Beig | Relativistic Elasticity II | 28 pages, to be published in Special Issue of Class. Quantum Gravity
on 'Focus on the Mathematics of Gravitation in the Non-Vacuum Regime' | null | 10.1088/1361-6382/acc307 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper is based on a series of talks given at the ESI program on
'Mathematical Perspectives of Gravitation Beyond the Vacuum Regime' in February
2022. It is meant to be an introduction to the field of relativistic elasticity
for readers with a good base in the mathematics of General Relativity with no
necessary p... | [
{
"created": "Fri, 10 Mar 2023 11:41:45 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Mar 2023 08:22:12 GMT",
"version": "v2"
}
] | 2023-03-24 | [
[
"Beig",
"Robert",
""
]
] | This paper is based on a series of talks given at the ESI program on 'Mathematical Perspectives of Gravitation Beyond the Vacuum Regime' in February 2022. It is meant to be an introduction to the field of relativistic elasticity for readers with a good base in the mathematics of General Relativity with no necessary pre... |
2110.05397 | Saeed Rastgoo | Keagan Blanchette, Saurya Das, Samantha Hergott, Saeed Rastgoo | Effective black hole interior and the Raychadhuri equation | This is the contribution to the Proceedings of the MG16 Conference.
11 pages, 4 figures; v2: citations added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that loop quantum gravity effects leads to the finiteness of
expansion and its rate of change in the effective regime in the interior of the
Schwarzschild black hole. As a consequence the singularity is resolved. We find
this in line with previous results about curvature scalar and strong curvature
singularit... | [
{
"created": "Mon, 11 Oct 2021 16:35:13 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Mar 2022 19:23:27 GMT",
"version": "v2"
}
] | 2022-03-07 | [
[
"Blanchette",
"Keagan",
""
],
[
"Das",
"Saurya",
""
],
[
"Hergott",
"Samantha",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | We show that loop quantum gravity effects leads to the finiteness of expansion and its rate of change in the effective regime in the interior of the Schwarzschild black hole. As a consequence the singularity is resolved. We find this in line with previous results about curvature scalar and strong curvature singularitie... |
2401.08269 | Matteo Carlesso | Jos\'e Luis Gaona-Reyes, Luc\'ia Men\'endez-Pidal, Mir Faizal, Matteo
Carlesso | Spontaneous collapse models lead to the emergence of classicality of the
Universe | null | J. High Energ. Phys. 2024, 193 (2024) | 10.1007/JHEP02(2024)193 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming that Quantum Mechanics is universal and that it can be applied over
all scales, then the Universe is allowed to be in a quantum superposition of
states, where each of them can correspond to a different space-time geometry.
How can one then describe the emergence of the classical, well-defined geometry
that w... | [
{
"created": "Tue, 16 Jan 2024 10:46:29 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2024 10:37:44 GMT",
"version": "v2"
}
] | 2024-02-27 | [
[
"Gaona-Reyes",
"José Luis",
""
],
[
"Menéndez-Pidal",
"Lucía",
""
],
[
"Faizal",
"Mir",
""
],
[
"Carlesso",
"Matteo",
""
]
] | Assuming that Quantum Mechanics is universal and that it can be applied over all scales, then the Universe is allowed to be in a quantum superposition of states, where each of them can correspond to a different space-time geometry. How can one then describe the emergence of the classical, well-defined geometry that we ... |
gr-qc/0402073 | Giovanni Montani | Andrea Marrocco and Giovanni Montani | QED Coupling from a 5-D Kaluza-Klein Theory | 3 pages, no figures, proceedings of the X Marcel Grossmann Meeting,
22-26 July 2003, Rio de Janeiro | null | 10.1142/9789812704030_0132 | null | gr-qc hep-th | null | We discuss the possibility to obtain, from a five-dimensional free spinor
Lagrangian, the Quantum Electro-Dynamics (QED) coupling via a Kaluza-Klein
reduction of the theory. This result is achieved taking a phase dependence of
the spinor field on the extra-coordinate and modifying the corresponding
connection. The fi... | [
{
"created": "Mon, 16 Feb 2004 10:45:22 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Marrocco",
"Andrea",
""
],
[
"Montani",
"Giovanni",
""
]
] | We discuss the possibility to obtain, from a five-dimensional free spinor Lagrangian, the Quantum Electro-Dynamics (QED) coupling via a Kaluza-Klein reduction of the theory. This result is achieved taking a phase dependence of the spinor field on the extra-coordinate and modifying the corresponding connection. The five... |
gr-qc/0004068 | Ulises Nucamendi | Ulises Nucamendi and Daniel Sudarsky | Black Holes with Zero Mass | 10 pages, 2 ps figures, REVTeX, some minor changes | Class.Quant.Grav. 17 (2000) 4051-4058 | 10.1088/0264-9381/17/19/306 | null | gr-qc astro-ph hep-th | null | We consider the spacetimes corresponding to static Global Monopoles with
interior boundaries corresponding to a Black Hole Horizon and analyze the
behavior of the appropriate ADM mass as a function of the horizon radius r_H.
We find that for small enough r_H, this mass is negative as in the case of the
regular global... | [
{
"created": "Thu, 20 Apr 2000 15:08:53 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2000 16:13:16 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Nucamendi",
"Ulises",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We consider the spacetimes corresponding to static Global Monopoles with interior boundaries corresponding to a Black Hole Horizon and analyze the behavior of the appropriate ADM mass as a function of the horizon radius r_H. We find that for small enough r_H, this mass is negative as in the case of the regular global m... |
1709.07709 | Helmut Friedrich | Helmut Friedrich | Peeling or not peeling -- is that the question ? | 22 pages, added reference, removed typos | null | 10.1088/1361-6382/aaafdb | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concepts of isolated self-gravitating system, asymptotic flatness and
asymptotic simplicity are reconsidered, various related results are discussed
and put into perspective, basic open questions are posed.
| [
{
"created": "Fri, 22 Sep 2017 12:25:57 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Feb 2018 09:59:51 GMT",
"version": "v2"
}
] | 2018-03-28 | [
[
"Friedrich",
"Helmut",
""
]
] | The concepts of isolated self-gravitating system, asymptotic flatness and asymptotic simplicity are reconsidered, various related results are discussed and put into perspective, basic open questions are posed. |
1206.1192 | Aurelien Barrau | Aurelien Barrau, Julien Grain | Quantum gravity in the sky | Brief essay written for the "Gravity Research Foundation" and updated
as an introduction for a lecture on the philosophy of gravity | null | null | null | gr-qc astro-ph.CO hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity is known to be mostly a kind of metaphysical speculation. In
this brief essay, we try to argue that, although still extremely difficult to
reach, observational signatures can in fact be expected. The early universe is
an invaluable laboratory to probe "Planck scale physics". With the example of
Loop Q... | [
{
"created": "Wed, 6 Jun 2012 11:59:40 GMT",
"version": "v1"
}
] | 2012-06-07 | [
[
"Barrau",
"Aurelien",
""
],
[
"Grain",
"Julien",
""
]
] | Quantum gravity is known to be mostly a kind of metaphysical speculation. In this brief essay, we try to argue that, although still extremely difficult to reach, observational signatures can in fact be expected. The early universe is an invaluable laboratory to probe "Planck scale physics". With the example of Loop Qua... |
gr-qc/0101102 | Racz Istvan | Istv\'an R\'acz | On rigidity of spacetimes with a compact Cauchy horizon | 2 pages, contribution to the 9th Marcel Grossmann meeting (MG9),
Rome, July 2000 | null | 10.1142/9789812777386_0138 | null | gr-qc | null | Smooth spacetimes with a compact Cauchy horizon ruled by closed null
geodesics are considered. The compact Cauchy horizon is assumed to be
non-degenerate. Then, supporting the validity of Penrose's strong cosmic censor
hypothesis, the existence of a smooth Killing vector field in a neighbourhood
of the horizon on the... | [
{
"created": "Fri, 26 Jan 2001 15:31:24 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Rácz",
"István",
""
]
] | Smooth spacetimes with a compact Cauchy horizon ruled by closed null geodesics are considered. The compact Cauchy horizon is assumed to be non-degenerate. Then, supporting the validity of Penrose's strong cosmic censor hypothesis, the existence of a smooth Killing vector field in a neighbourhood of the horizon on the C... |
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