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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0710.4243 | Tolga Birkandan | T. Birkandan, M. Hortacsu | Heun and Mathieu functions as solutions of the Dirac equation | 5 pages, Prepared for the Spanish Relativity Meeting (ERE 2007),
Tenerife, Spain, 10-14 Sep 2007 | EAS Publ.Ser.30:265,2008 | 10.1051/eas:0830041 | null | gr-qc | null | We give examples of where the Heun function exists as solutions of wave
equations encountered in general relativity. While the Dirac equation written
in the background of Nutku helicoid metric yields Mathieu functions as its
solutions in four spacetime dimensions, the trivial generalization to five
dimensions results... | [
{
"created": "Tue, 23 Oct 2007 11:27:02 GMT",
"version": "v1"
}
] | 2011-08-31 | [
[
"Birkandan",
"T.",
""
],
[
"Hortacsu",
"M.",
""
]
] | We give examples of where the Heun function exists as solutions of wave equations encountered in general relativity. While the Dirac equation written in the background of Nutku helicoid metric yields Mathieu functions as its solutions in four spacetime dimensions, the trivial generalization to five dimensions results i... |
1006.0559 | Ali Kaya | Ali Kaya | Cosmological Evolution of Vacuum and Cosmic Acceleration | 22 pages, 2 figures, revtex4, v4: typos corrected | Class.Quant.Grav.27:235022,2010 | 10.1088/0264-9381/27/23/235022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that the unregularized expressions for the stress-energy tensor
components corresponding to subhorizon and superhorizon vacuum fluctuations of
a massless scalar field in a Friedmann-Robertson-Walker background are
characterized by the equation of state parameters w=1/3 and w=-1/3, which are
not sufficient... | [
{
"created": "Thu, 3 Jun 2010 06:26:45 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Aug 2010 09:16:30 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Oct 2010 18:07:27 GMT",
"version": "v3"
},
{
"created": "Thu, 18 Nov 2010 14:51:13 GMT",
"version": "v4"
}
] | 2010-11-19 | [
[
"Kaya",
"Ali",
""
]
] | It is known that the unregularized expressions for the stress-energy tensor components corresponding to subhorizon and superhorizon vacuum fluctuations of a massless scalar field in a Friedmann-Robertson-Walker background are characterized by the equation of state parameters w=1/3 and w=-1/3, which are not sufficient t... |
gr-qc/0410046 | Sante Carloni | S. Carloni, P. K. S. Dunsby, S. Capozziello and A. Troisi | Cosmological dynamics of R^n gravity | revised and extended version, 35 pages, 12 tables, 14 figures which
are not included and can be found at http://www.mth.uct.ac.za/~peter/Rn | Class.Quant.Grav.22:4839-4868,2005 | 10.1088/0264-9381/22/22/011 | null | gr-qc astro-ph hep-th | null | A detailed analysis of dynamics of cosmological models based on $R^{n}$
gravity is presented. We show that the cosmological equations can be written as
a first order autonomous system and analyzed using the standard techniques of
dynamical system theory. In absence of perfect fluid matter, we find exact
solutions who... | [
{
"created": "Mon, 11 Oct 2004 19:45:34 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Oct 2004 08:04:58 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jul 2005 10:57:54 GMT",
"version": "v3"
},
{
"created": "Wed, 20 Jul 2005 10:06:36 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Carloni",
"S.",
""
],
[
"Dunsby",
"P. K. S.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Troisi",
"A.",
""
]
] | A detailed analysis of dynamics of cosmological models based on $R^{n}$ gravity is presented. We show that the cosmological equations can be written as a first order autonomous system and analyzed using the standard techniques of dynamical system theory. In absence of perfect fluid matter, we find exact solutions whose... |
2205.01705 | Hao-Jui Kuan | Hao-Jui Kuan, Kostas D. Kokkotas | $f$-mode Imprints in Gravitational Waves from Coalescing Binaries
involving Aligned Spinning Neutron Stars | 16 pages, 9 figures, 2 tables. Accepted for publication in PRD | null | 10.1103/PhysRevD.106.064052 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The excitation of $f$-mode in a neutron star member of coalescing binaries
accelerates the merger course, and thereby introduces a phase shift in the
gravitational waveform. Emphasising on the tidal phase shift by aligned,
rotating stars, we provide an accurate, yet economical, method to generate
$f$-mode-involved, p... | [
{
"created": "Tue, 3 May 2022 18:02:45 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Sep 2022 15:27:54 GMT",
"version": "v2"
}
] | 2022-10-12 | [
[
"Kuan",
"Hao-Jui",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | The excitation of $f$-mode in a neutron star member of coalescing binaries accelerates the merger course, and thereby introduces a phase shift in the gravitational waveform. Emphasising on the tidal phase shift by aligned, rotating stars, we provide an accurate, yet economical, method to generate $f$-mode-involved, pre... |
2011.00031 | Sepideh Bakhoda | Sepideh Bakhoda and Thomas Thiemann | Covariant Origin of the $U(1)^3$ model for Euclidean Quantum Gravity | 26 pages | Class. Quantum Grav. 39 (2022) 025006 | 10.1088/1361-6382/ac37a4 | null | gr-qc hep-lat hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The utility of the U(1)$^3$ model as a test laboratory for quantum gravity
has recently been emphasized in a recent series of papers due to Varadarajan et
al. The simplification from SU(2) to U(1)$^3$ can be performed simply by hand
within the Hamiltonian formulation by dropping all non-Abelian terms from the
Gauss, ... | [
{
"created": "Fri, 30 Oct 2020 18:22:37 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Dec 2021 15:00:14 GMT",
"version": "v2"
}
] | 2021-12-21 | [
[
"Bakhoda",
"Sepideh",
""
],
[
"Thiemann",
"Thomas",
""
]
] | The utility of the U(1)$^3$ model as a test laboratory for quantum gravity has recently been emphasized in a recent series of papers due to Varadarajan et al. The simplification from SU(2) to U(1)$^3$ can be performed simply by hand within the Hamiltonian formulation by dropping all non-Abelian terms from the Gauss, sp... |
1811.03283 | Craig J. Hogan | Craig Hogan | Nonlocal Entanglement and Directional Correlations of Primordial
Perturbations on the Inflationary Horizon | Final version, edited to match published version | Phys. Rev. D 99, 063531 (2019) | 10.1103/PhysRevD.99.063531 | FERMILAB-PUB-18-178-A | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Models are developed to estimate properties of relic cosmic perturbations
with "spooky" nonlocal correlations on the inflationary horizon, analogous to
those previously posited for information on black hole event horizons. Scalar
curvature perturbations are estimated to emerge with a dimensionless power
spectral dens... | [
{
"created": "Thu, 8 Nov 2018 05:58:45 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Nov 2018 21:35:38 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Dec 2018 16:41:50 GMT",
"version": "v3"
},
{
"created": "Thu, 20 Dec 2018 16:27:20 GMT",
"version": "v4"
},
{
"cr... | 2019-05-02 | [
[
"Hogan",
"Craig",
""
]
] | Models are developed to estimate properties of relic cosmic perturbations with "spooky" nonlocal correlations on the inflationary horizon, analogous to those previously posited for information on black hole event horizons. Scalar curvature perturbations are estimated to emerge with a dimensionless power spectral densit... |
1203.4534 | Tim-Torben Paetz | Piotr T. Chru\'sciel and Tim-Torben Paetz | The many ways of the characteristic Cauchy problem | 25 pages, a couple of minor changes, version corresponds to the one
published in CQG | Class. Quantum Grav. 29 (2012) 145006 | 10.1088/0264-9381/29/14/145006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review various aspects of the characteristic initial value problem for the
Einstein equations, presenting new approaches to some of the issues arising.
| [
{
"created": "Tue, 20 Mar 2012 18:18:47 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jul 2012 09:04:19 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Paetz",
"Tim-Torben",
""
]
] | We review various aspects of the characteristic initial value problem for the Einstein equations, presenting new approaches to some of the issues arising. |
gr-qc/0310051 | Michael Kuchiev | M. Yu. Kuchiev | Reflection, radiation and interference for black holes | 10 pages, 1 figure, Revtex | Phys.Rev. D69 (2004) 124031 | 10.1103/PhysRevD.69.124031 | null | gr-qc astro-ph hep-th | null | Black holes are capable of reflection: there is a finite probability for any
particle that approaches the event horizon to bounce back. The albedo of the
black hole depends on its temperature and the energy of the incoming particle.
The reflection shares its physical origins with the Hawking process of
radiation, bot... | [
{
"created": "Thu, 9 Oct 2003 00:15:42 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kuchiev",
"M. Yu.",
""
]
] | Black holes are capable of reflection: there is a finite probability for any particle that approaches the event horizon to bounce back. The albedo of the black hole depends on its temperature and the energy of the incoming particle. The reflection shares its physical origins with the Hawking process of radiation, both ... |
2304.11836 | Sizheng Ma | Sizheng Ma, Vijay Varma, Leo C. Stein, Francois Foucart, Matthew D.
Duez, Lawrence E. Kidder, Harald P. Pfeiffer, Mark A. Scheel | Numerical simulations of black hole-neutron star mergers in
scalar-tensor gravity | null | Phys. Rev. D 107, 124051 (2023) | 10.1103/PhysRevD.107.124051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a numerical-relativity simulation of a black hole - neutron star
merger in scalar-tensor (ST) gravity with binary parameters consistent with the
gravitational wave event GW200115. In this exploratory simulation, we consider
the Damour-Esposito-Farese extension to Brans-Dicke theory, and maximize the
effect... | [
{
"created": "Mon, 24 Apr 2023 05:59:16 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2023 05:48:42 GMT",
"version": "v2"
}
] | 2023-06-29 | [
[
"Ma",
"Sizheng",
""
],
[
"Varma",
"Vijay",
""
],
[
"Stein",
"Leo C.",
""
],
[
"Foucart",
"Francois",
""
],
[
"Duez",
"Matthew D.",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
... | We present a numerical-relativity simulation of a black hole - neutron star merger in scalar-tensor (ST) gravity with binary parameters consistent with the gravitational wave event GW200115. In this exploratory simulation, we consider the Damour-Esposito-Farese extension to Brans-Dicke theory, and maximize the effect o... |
0810.5594 | Thomas Sotiriou | Thomas P. Sotiriou | 6+1 lessons from f(R) gravity | Talk given at the 13th Conference on Recent Developments in Gravity
(NEBXIII), Thessaloniki, Greece, 4-6 Jun 2008 | J.Phys.Conf.Ser.189:012039,2009 | 10.1088/1742-6596/189/1/012039 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There has been a recent stimulus in the study of alternative theories of
gravity lately, mostly triggered from combined motivation coming from
cosmology/astrophysics and high energy physics. Among the proposed theories,
one that has attracted much attention is f(R) gravity. It is certainly
debatable whether such a si... | [
{
"created": "Thu, 30 Oct 2008 23:26:00 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Sotiriou",
"Thomas P.",
""
]
] | There has been a recent stimulus in the study of alternative theories of gravity lately, mostly triggered from combined motivation coming from cosmology/astrophysics and high energy physics. Among the proposed theories, one that has attracted much attention is f(R) gravity. It is certainly debatable whether such a simp... |
1607.06631 | Abdulla Al Mamon | Abdulla Al Mamon, Kazuharu Bamba and Sudipta Das | Constraints on reconstructed dark energy model from SN Ia and BAO/CMB
observations | Revised version, References added, Accepted for publication in
European Physical Journal C | null | 10.1140/epjc/s10052-016-4590-y | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motivation of the present work is to reconstruct a dark energy model
through the {\it dimensionless dark energy function} $X(z)$, which is the dark
energy density in units of its present value. In this paper, we have shown that
a scalar field $\phi$ having a phenomenologically chosen $X(z)$ can give rise
to a tra... | [
{
"created": "Fri, 22 Jul 2016 11:05:58 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Dec 2016 09:26:35 GMT",
"version": "v2"
}
] | 2017-02-01 | [
[
"Mamon",
"Abdulla Al",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Das",
"Sudipta",
""
]
] | The motivation of the present work is to reconstruct a dark energy model through the {\it dimensionless dark energy function} $X(z)$, which is the dark energy density in units of its present value. In this paper, we have shown that a scalar field $\phi$ having a phenomenologically chosen $X(z)$ can give rise to a trans... |
gr-qc/0505108 | Sigbjorn Hervik | Sigbjorn Hervik and Alan Coley | Inhomogeneous perturbations of plane-wave spacetimes | 8 pages, to appear in CQG | Class.Quant.Grav. 22 (2005) 3391-3398 | 10.1088/0264-9381/22/17/002 | null | gr-qc astro-ph hep-th | null | Recently it was shown that the exact cosmological solutions known as the
vacuum plane-wave solutions are late-time attractors for an open set of the
spatially homogeneous Bianchi universes containing a non-inflationary
$\gamma$-law perfect fluid. In this paper we study inhomogeneous perturbations
of these plane-wave ... | [
{
"created": "Fri, 20 May 2005 14:31:17 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2005 13:44:46 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Hervik",
"Sigbjorn",
""
],
[
"Coley",
"Alan",
""
]
] | Recently it was shown that the exact cosmological solutions known as the vacuum plane-wave solutions are late-time attractors for an open set of the spatially homogeneous Bianchi universes containing a non-inflationary $\gamma$-law perfect fluid. In this paper we study inhomogeneous perturbations of these plane-wave sp... |
gr-qc/0212026 | Mario Novello | M. Novello | Geometrical description of spin-2 fields | null | null | null | null | gr-qc | null | We show that the torsion of a Cartan geometry can be associated to two spin-2
fields. This structure allows a new approach to deal with the proposal of
geometrization of spin-2 fields besides the traditional one dealt with in
General Relativity. We use the associated Hilbert-Einstein Lagrangian $R$ for
generating a d... | [
{
"created": "Thu, 5 Dec 2002 17:59:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Novello",
"M.",
""
]
] | We show that the torsion of a Cartan geometry can be associated to two spin-2 fields. This structure allows a new approach to deal with the proposal of geometrization of spin-2 fields besides the traditional one dealt with in General Relativity. We use the associated Hilbert-Einstein Lagrangian $R$ for generating a dyn... |
gr-qc/0404028 | Belinch\'on Jos\'e Antonio | Jos\'e Antonio Belinch\'on | An excuse for revising a theory of time-varying "constants" | 16 pages, 5 figures. Revtex4. Minor changes in the appendix | null | null | null | gr-qc | null | In this paper we compare the dimensional method with the Lie groups tactic in
order to show the limitations and advantages of each technique. For this
purpose we study in detail a perfect fluid cosmological model with time-varying
"constants" by using dimensional analysis and the symmetry method. We revise
our previo... | [
{
"created": "Wed, 7 Apr 2004 07:37:44 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jun 2004 16:05:49 GMT",
"version": "v2"
}
] | 2009-09-29 | [
[
"Belinchón",
"José Antonio",
""
]
] | In this paper we compare the dimensional method with the Lie groups tactic in order to show the limitations and advantages of each technique. For this purpose we study in detail a perfect fluid cosmological model with time-varying "constants" by using dimensional analysis and the symmetry method. We revise our previous... |
2205.00875 | Naresh Dadhich | Naresh Dadhich | Fundamental forces and their dynamics | Revamped and published version, Contribution to Professor T.
Padmanabhan memorial volume, GRG Journal | Gen. Relativ. Grav. \{bf 54}, 83 (2022) | 10.1007/s10714-022-02967-8 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this essay, we wish to propose a general principle: \it{the equation of
motion or dynamics of a fundamental force should not be prescribed but instead
be entirely driven by geometry of the appropriate spacetime manifold, and the
equation is then obtained by employing only the geometric property without
appeal to a... | [
{
"created": "Fri, 29 Apr 2022 06:32:22 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Aug 2022 07:15:29 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Dadhich",
"Naresh",
""
]
] | In this essay, we wish to propose a general principle: \it{the equation of motion or dynamics of a fundamental force should not be prescribed but instead be entirely driven by geometry of the appropriate spacetime manifold, and the equation is then obtained by employing only the geometric property without appeal to an ... |
gr-qc/9712013 | Nuno Barros e Sa' | Nuno Barros e Sa | Geodesics or autoparallels from a variational principle? | Latex, 13 pages, no figures | null | null | USITP 97-19 | gr-qc | null | Recently it has been argued that autoparallels should be the correct
description of free particle motion in spaces with torsion, and that such
trajectories can be derived from variational principles if these are suitably
adapted. The purpose of this letter is to call attention to the problems that
such attempts raise... | [
{
"created": "Tue, 2 Dec 1997 14:51:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sa",
"Nuno Barros e",
""
]
] | Recently it has been argued that autoparallels should be the correct description of free particle motion in spaces with torsion, and that such trajectories can be derived from variational principles if these are suitably adapted. The purpose of this letter is to call attention to the problems that such attempts raise, ... |
2311.09654 | Shunke Ai | Yikang Chen, Bin Liu, Shunke Ai, Lin Lan, He Gao, Yong Yuan and
Zong-Hong Zhu | On the possibility to detect gravitational waves from post-merger
super-massive neutron stars with a kilohertz detector | 10 pages, 6 figures, 4 tables, accepted for publication on MNRAS | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of a secular post-merger gravitational wave (GW) signal in a
binary neutron star (BNS) merger serves as strong evidence for the formation of
a long-lived post-merger neutron star (NS), which can help constrain the
maximum mass of NSs and differentiate NS equation of states. We specifically
focus on the ... | [
{
"created": "Thu, 16 Nov 2023 08:12:41 GMT",
"version": "v1"
}
] | 2023-11-17 | [
[
"Chen",
"Yikang",
""
],
[
"Liu",
"Bin",
""
],
[
"Ai",
"Shunke",
""
],
[
"Lan",
"Lin",
""
],
[
"Gao",
"He",
""
],
[
"Yuan",
"Yong",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | The detection of a secular post-merger gravitational wave (GW) signal in a binary neutron star (BNS) merger serves as strong evidence for the formation of a long-lived post-merger neutron star (NS), which can help constrain the maximum mass of NSs and differentiate NS equation of states. We specifically focus on the de... |
1111.2672 | Steffen Gielen | Steffen Gielen | The Space of Connections as the Arena for (Quantum) Gravity | Appeared as a review paper in the Special Issue "Loop Quantum Gravity
and Cosmology" of SIGMA; v2: added ref.[9] | SIGMA 7 (2011), 104, 12 pages | 10.3842/SIGMA.2011.104 | AEI-2011-086 | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | We review some properties of the space of connections as the natural arena
for canonical (quantum) gravity, and compare to the case of the superspace of
3-metrics. We detail how a 1-parameter family of metrics on the space of
connections arises from the canonical analysis for general relativity which has
a natural in... | [
{
"created": "Fri, 11 Nov 2011 06:44:42 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2011 22:54:54 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Gielen",
"Steffen",
""
]
] | We review some properties of the space of connections as the natural arena for canonical (quantum) gravity, and compare to the case of the superspace of 3-metrics. We detail how a 1-parameter family of metrics on the space of connections arises from the canonical analysis for general relativity which has a natural inte... |
2112.06644 | Hermano Velten | J\'ulio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda and
Hermano Velten | Nonconservative unimodular gravity: a viable cosmological scenario | 8 pages, 1 figure | null | 10.1140/epjc/s10052-022-10470-2 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In this work we review the issue of imposing the conservation of the
energy-momentum tensor as a necessary condition to recover the equivalence
between the unimodular gravity and General Relativity (GR) equipped with a
cosmological constant. This procedure is usually interpreted as an {\it ad hoc}
imposition on the u... | [
{
"created": "Mon, 13 Dec 2021 13:25:21 GMT",
"version": "v1"
}
] | 2022-06-29 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Alvarenga",
"Marcelo H.",
""
],
[
"Hamani-Daouda",
"Mahamadou",
""
],
[
"Velten",
"Hermano",
""
]
] | In this work we review the issue of imposing the conservation of the energy-momentum tensor as a necessary condition to recover the equivalence between the unimodular gravity and General Relativity (GR) equipped with a cosmological constant. This procedure is usually interpreted as an {\it ad hoc} imposition on the uni... |
gr-qc/0401116 | Pierre Martinetti | P. Martinetti | A brief remark on Unruh effect and causality | One reference corrected | J.Phys.Conf.Ser.68:012027,2007 | 10.1088/1742-6596/68/1/012027 | null | gr-qc | null | Unruh effect states that the vacuum of a quantum field theory on Minkovski
space-time looks like a thermal state for an eternal uniformly accelerated
observer. Adaptation to the non eternal case causes a serious problem: if the
thermalization of the vacuum depends on the lifetime of the observer, then in
principle th... | [
{
"created": "Wed, 28 Jan 2004 22:36:50 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Feb 2004 12:33:51 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Martinetti",
"P.",
""
]
] | Unruh effect states that the vacuum of a quantum field theory on Minkovski space-time looks like a thermal state for an eternal uniformly accelerated observer. Adaptation to the non eternal case causes a serious problem: if the thermalization of the vacuum depends on the lifetime of the observer, then in principle the ... |
2307.02919 | Francisco Fern\'andez-\'Alvarez | Francisco Fern\'andez-\'Alvarez | Degrees of freedom of gravitational radiation with positive cosmological
constant | 26 pages, 2 figures, typos corrected | Phys. Rev. D 108, 064028 (2023) | 10.1103/PhysRevD.108.064028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results on the isolation of the radiative degrees of freedom of the
gravitational field with a positive cosmological constant in full General
Relativity are put forward. Methods employed in a recent geometric
characterisation of gravitational radiation are used and, inspired by
Ashtekar's work on asymptotically flat ... | [
{
"created": "Thu, 6 Jul 2023 11:16:18 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2023 14:49:52 GMT",
"version": "v2"
}
] | 2023-09-15 | [
[
"Fernández-Álvarez",
"Francisco",
""
]
] | Results on the isolation of the radiative degrees of freedom of the gravitational field with a positive cosmological constant in full General Relativity are put forward. Methods employed in a recent geometric characterisation of gravitational radiation are used and, inspired by Ashtekar's work on asymptotically flat sp... |
1302.1190 | Paul Wesson | Paul S. Wesson and James M. Overduin | Wave Mechanics and the Fifth Dimension | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Replacing 4D Minkowski space by 5D canonical space leads to a clearer
derivation of the main features of wave mechanics, including the wave function
and the velocity of de Broglie waves. Recent tests of wave-particle duality
could be adapted to investigate whether de Broglie waves are basically 4D or 5D
in nature.
| [
{
"created": "Mon, 28 Jan 2013 00:22:26 GMT",
"version": "v1"
}
] | 2013-02-06 | [
[
"Wesson",
"Paul S.",
""
],
[
"Overduin",
"James M.",
""
]
] | Replacing 4D Minkowski space by 5D canonical space leads to a clearer derivation of the main features of wave mechanics, including the wave function and the velocity of de Broglie waves. Recent tests of wave-particle duality could be adapted to investigate whether de Broglie waves are basically 4D or 5D in nature. |
gr-qc/0001074 | Roberto Colistete Junior | N. Pinto-Neto, A. F. Velasco, R. Colistete Jr | Quantum Isotropization of the Universe | 10 pages, RevTeX, 3 Postscript figures, uses graficx.sty | Phys.Lett. A277 (2000) 194-204 | 10.1016/S0375-9601(00)00706-4 | null | gr-qc | null | We consider minisuperspace models constituted of Bianchi I geometries with a
free massless scalar field. The classical solutions are always singular (with
the trivial exception of flat space-time), and always anisotropic once they
begin anisotropic. When quantizing the system, we obtain the Wheeler-DeWitt
equation as... | [
{
"created": "Mon, 24 Jan 2000 14:49:41 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pinto-Neto",
"N.",
""
],
[
"Velasco",
"A. F.",
""
],
[
"Colistete",
"R.",
"Jr"
]
] | We consider minisuperspace models constituted of Bianchi I geometries with a free massless scalar field. The classical solutions are always singular (with the trivial exception of flat space-time), and always anisotropic once they begin anisotropic. When quantizing the system, we obtain the Wheeler-DeWitt equation as a... |
1911.05512 | Gonzalo Garc\'ia-Reyes | Gonzalo Garc\'ia-Reyes | Poisson type conformastat spherically symmetric anisotropic fluid
spacetimes | 21 pages, 48 figures | Chinese J. Phys.77, 465-482 (2022) | 10.1016/j.cjph.2022.03.001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct conformastat spherically symmetric spacetimes representing
anisotropic fluid matter distributions from given solutions of the Poisson's
equation of Newtonian gravity and its corresponding circular speed profile. As
simple examples, we present three families of spherically symmetric spacetimes
which we ap... | [
{
"created": "Wed, 13 Nov 2019 14:43:47 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jan 2020 14:49:02 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Jul 2020 14:41:38 GMT",
"version": "v3"
},
{
"created": "Mon, 24 May 2021 13:17:18 GMT",
"version": "v4"
},
{
"c... | 2022-03-21 | [
[
"García-Reyes",
"Gonzalo",
""
]
] | We construct conformastat spherically symmetric spacetimes representing anisotropic fluid matter distributions from given solutions of the Poisson's equation of Newtonian gravity and its corresponding circular speed profile. As simple examples, we present three families of spherically symmetric spacetimes which we appl... |
1705.09749 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Three new roads to the Planck scale | 10 pages, to appear in Am. J. Phys | null | 10.1119/1.4994804 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three new heuristic derivations of the Planck scale are described. They are
based on basic principles or phenomena of relativistic gravity and quantum
physics. The Planck scale quantities thus obtained are within one order of
magnitude of the "standard" ones. We contemplate the pair creation of causal
bubbles so smal... | [
{
"created": "Sat, 27 May 2017 01:09:42 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | Three new heuristic derivations of the Planck scale are described. They are based on basic principles or phenomena of relativistic gravity and quantum physics. The Planck scale quantities thus obtained are within one order of magnitude of the "standard" ones. We contemplate the pair creation of causal bubbles so small ... |
0904.0033 | Mark Berndtson | Mark V. Berndtson | Harmonic gauge perturbations of the Schwarzschild metric | PhD Thesis, 2007, Department of Physics, University of Colorado,
Boulder. 248 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The satellite observatory LISA will be capable of detecting gravitational
waves from extreme mass ratio inspirals (EMRIs), such as a small black hole
orbiting a supermassive black hole. The gravitational effects of the much
smaller mass can be treated as the perturbation of a known background metric,
here the Schwarz... | [
{
"created": "Tue, 31 Mar 2009 23:38:36 GMT",
"version": "v1"
}
] | 2009-04-02 | [
[
"Berndtson",
"Mark V.",
""
]
] | The satellite observatory LISA will be capable of detecting gravitational waves from extreme mass ratio inspirals (EMRIs), such as a small black hole orbiting a supermassive black hole. The gravitational effects of the much smaller mass can be treated as the perturbation of a known background metric, here the Schwarzsc... |
1411.1986 | Jafar Khodagholizadeh | Fatemeh Ahmadi, Jafar Khodagholizadeh and H.R.Sepangi | Lorentz violation and red shift of gravitational waves in brane-worlds | 12 pages. arXiv admin note: substantial text overlap with
arXiv:gr-qc/0702103; and text overlap with arXiv:arXiv:gr-qc/0305041 by other
author | Astrophys.Space Sci. 342 (2012) 487-492 | 10.1007/s10509-012-1183-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the speed of gravitational waves in a brane world
scenario and show that if the extra dimension is space-like, the speed of the
propagation of such waves is greater in the bulk than that on the brane.
Therefore, the 4D Lorentz invariance is broken in the gravitational sector. A
comparison is al... | [
{
"created": "Fri, 7 Nov 2014 17:16:53 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Ahmadi",
"Fatemeh",
""
],
[
"Khodagholizadeh",
"Jafar",
""
],
[
"Sepangi",
"H. R.",
""
]
] | In this paper we study the speed of gravitational waves in a brane world scenario and show that if the extra dimension is space-like, the speed of the propagation of such waves is greater in the bulk than that on the brane. Therefore, the 4D Lorentz invariance is broken in the gravitational sector. A comparison is also... |
2310.03697 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi | Non-minimally coupled quintessence in the Gauss-Bonnet model, symmetry
breaking, and cosmic acceleration | 14 pages, 5 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a model consisting of a quintessence coupled to the Ricci scalar
and the Gauss-Bonnet invariant. We propose a mechanism for the rising of dark
energy in the matter era, alleviating the coincidence problem. The role of the
Gauss-Bonnet invariant is to restore the initial $Z_2$ symmetry. The Ricci
scalar br... | [
{
"created": "Thu, 5 Oct 2023 17:13:30 GMT",
"version": "v1"
}
] | 2023-10-06 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | We consider a model consisting of a quintessence coupled to the Ricci scalar and the Gauss-Bonnet invariant. We propose a mechanism for the rising of dark energy in the matter era, alleviating the coincidence problem. The role of the Gauss-Bonnet invariant is to restore the initial $Z_2$ symmetry. The Ricci scalar brea... |
1107.0949 | Jonathan Kommemi | Jonathan Kommemi | The global structure of spherically symmetric charged scalar field
spacetimes | updated to include comments/suggestions from referees; to appear in
Commun. Math. Phys | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We initiate the mathematical study of spherical collapse of self-gravitating
charged scalar fields. The main result gives a complete characterization of the
future boundary of spacetime, providing a starting point for studying the
cosmic censorship conjectures. In general, the boundary includes two null
components, o... | [
{
"created": "Tue, 5 Jul 2011 19:08:34 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2013 00:08:03 GMT",
"version": "v2"
}
] | 2013-02-13 | [
[
"Kommemi",
"Jonathan",
""
]
] | We initiate the mathematical study of spherical collapse of self-gravitating charged scalar fields. The main result gives a complete characterization of the future boundary of spacetime, providing a starting point for studying the cosmic censorship conjectures. In general, the boundary includes two null components, one... |
1405.6116 | Kirill Bronnikov | K.A. Bronnikov, J.C. Fabris, R. Silveira, O.B. Zaslavskii | Dilaton gravity, charged dust, and (quasi-) black holes | revtex4, 4 pages, 1 figure of 3 parts. A brief presentation of main
results (not all) of arXiv:1312.4891 | Phys. Rev. D 89, 107501 (2014) | 10.1103/PhysRevD.89.107501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Einstein-Maxwell-dilaton gravity with charged dust and
interaction of the form $P(\chi) F_{\mu\nu} F^{\mu\nu}$, where $P(\chi)$ is an
arbitrary function of the dilaton field $\chi$ that can be normal or phantom.
For any regular $P(\chi)$, static configurations are possible with arbitrary
functions $g_{00}... | [
{
"created": "Fri, 23 May 2014 16:42:37 GMT",
"version": "v1"
}
] | 2014-05-26 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Silveira",
"R.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We consider Einstein-Maxwell-dilaton gravity with charged dust and interaction of the form $P(\chi) F_{\mu\nu} F^{\mu\nu}$, where $P(\chi)$ is an arbitrary function of the dilaton field $\chi$ that can be normal or phantom. For any regular $P(\chi)$, static configurations are possible with arbitrary functions $g_{00} =... |
1610.03540 | Lars Andersson | Lars Andersson, Thomas B\"ackdahl, Pieter Blue | Geometry of black hole spacetimes | Based on lectures given by the first named author at the 2014 Summer
School on Asymptotic Analysis in General Relativity, held at Institut
Fourier, Grenoble. arXiv admin note: text overlap with arXiv:1504.02069 | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These notes, based on lectures given at the summer school on Asymptotic
Analysis in General Relativity, collect material on the Einstein equations, the
geometry of black hole spacetimes, and the analysis of fields on black hole
backgrounds. The Kerr model of a rotating black hole in vacuum is expected to
be unique an... | [
{
"created": "Tue, 11 Oct 2016 21:31:56 GMT",
"version": "v1"
}
] | 2016-10-13 | [
[
"Andersson",
"Lars",
""
],
[
"Bäckdahl",
"Thomas",
""
],
[
"Blue",
"Pieter",
""
]
] | These notes, based on lectures given at the summer school on Asymptotic Analysis in General Relativity, collect material on the Einstein equations, the geometry of black hole spacetimes, and the analysis of fields on black hole backgrounds. The Kerr model of a rotating black hole in vacuum is expected to be unique and ... |
gr-qc/0305058 | Tomohiro Harada | Tomohiro Harada, Hideo Iguchi, and Masaru Shibata | Computing gravitational waves from slightly nonspherical stellar
collapse to black hole: Odd-parity perturbation | 31 pages, accepted for publication in Phys. Rev. D, typos and minor
errors corrected | Phys.Rev.D68:024002,2003 | 10.1103/PhysRevD.68.024002 | null | gr-qc astro-ph | null | Nonspherical stellar collapse to a black hole is one of the most promising
gravitational wave sources for gravitational wave detectors. We numerically
study gravitational waves from a slightly nonspherical stellar collapse to a
black hole in linearized Einstein theory. We adopt a spherically collapsing
star as the ze... | [
{
"created": "Thu, 15 May 2003 14:21:51 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 2003 12:13:18 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Harada",
"Tomohiro",
""
],
[
"Iguchi",
"Hideo",
""
],
[
"Shibata",
"Masaru",
""
]
] | Nonspherical stellar collapse to a black hole is one of the most promising gravitational wave sources for gravitational wave detectors. We numerically study gravitational waves from a slightly nonspherical stellar collapse to a black hole in linearized Einstein theory. We adopt a spherically collapsing star as the zero... |
2210.01552 | Pardyumn Kumar Sahoo | Simran Arora, Aaqid Bhat, P.K. Sahoo | Squared torsion $f(T,\mathcal{T})$ gravity and its cosmological
implications | Fortschr. Phys. accepted version | Fortschr. Phys. 71(2-3) (2023) 2200162 | 10.1002/prop.202200162 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present the coupling of the torsion scalar $T$ and the trace of
energy-momentum tensor $\mathcal{T}$, which produces new modified
$f(T,\mathcal{T})$ gravity. Moreover, we consider the functional form
$f(T,\mathcal{T}) =\alpha \mathcal{T}+\beta T^2$ where $\alpha$ and $\beta$ are
free parameters. As an alternative ... | [
{
"created": "Sun, 2 Oct 2022 09:21:44 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2022 09:18:46 GMT",
"version": "v2"
}
] | 2023-03-13 | [
[
"Arora",
"Simran",
""
],
[
"Bhat",
"Aaqid",
""
],
[
"Sahoo",
"P. K.",
""
]
] | We present the coupling of the torsion scalar $T$ and the trace of energy-momentum tensor $\mathcal{T}$, which produces new modified $f(T,\mathcal{T})$ gravity. Moreover, we consider the functional form $f(T,\mathcal{T}) =\alpha \mathcal{T}+\beta T^2$ where $\alpha$ and $\beta$ are free parameters. As an alternative to... |
2012.08785 | Che-Yu Chen | Suddhasattwa Brahma, Che-Yu Chen, Dong-han Yeom | Testing loop quantum gravity from observational consequences of
non-singular rotating black holes | 21 pages, 7 figures. Accepted for publication in PRL | Phys. Rev. Lett. 126, 181301 (2021) | 10.1103/PhysRevLett.126.181301 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The lack of rotating black hole models, which are typically found in nature,
in loop quantum gravity (LQG) substantially hinders the progress of testing LQG
from observations. Starting with a non-rotating LQG black hole as a seed
metric, we construct a rotating spacetime using the revised Newman-Janis
algorithm. The ... | [
{
"created": "Wed, 16 Dec 2020 08:04:31 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Apr 2021 18:38:18 GMT",
"version": "v2"
},
{
"created": "Thu, 6 May 2021 17:47:11 GMT",
"version": "v3"
}
] | 2021-05-07 | [
[
"Brahma",
"Suddhasattwa",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Yeom",
"Dong-han",
""
]
] | The lack of rotating black hole models, which are typically found in nature, in loop quantum gravity (LQG) substantially hinders the progress of testing LQG from observations. Starting with a non-rotating LQG black hole as a seed metric, we construct a rotating spacetime using the revised Newman-Janis algorithm. The ro... |
1901.08283 | Gen Ye | Gen Ye and Yun-Song Piao | Bounce in GR and higher-order derivative operators | 3 figures, matched published version in PhysRevD | Phys. Rev. D 99, 084019 (2019) | 10.1103/PhysRevD.99.084019 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent progress seems to suggest that one must modify General Relativity (GR)
to stably violate the null energy condition and avoid the cosmological
singularity. However, with the higher-order derivative operators of scalar
field (a subclass of the degenerate higher-order scalar-tensor theory), we show
that at energi... | [
{
"created": "Thu, 24 Jan 2019 08:40:35 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Oct 2019 03:16:33 GMT",
"version": "v2"
}
] | 2019-10-18 | [
[
"Ye",
"Gen",
""
],
[
"Piao",
"Yun-Song",
""
]
] | Recent progress seems to suggest that one must modify General Relativity (GR) to stably violate the null energy condition and avoid the cosmological singularity. However, with the higher-order derivative operators of scalar field (a subclass of the degenerate higher-order scalar-tensor theory), we show that at energies... |
gr-qc/9805079 | Gerard 't Hooft | G. 't Hooft | TransPlanckian Particles and the Quantization of Time | 12 pages plain tex, 1 figure | Class.Quant.Grav. 16 (1999) 395-405 | 10.1088/0264-9381/16/2/006 | THU-98/22 | gr-qc | null | Trans-Planckian particles are elementary particles accelerated such that
their energies surpass the Planck value. There are several reasons to believe
that trans-Planckian particles do not represent independent degrees of freedom
in Hilbert space, but they are controlled by the cis-Planckian particles. A way
to learn... | [
{
"created": "Wed, 20 May 1998 16:19:24 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Hooft",
"G. 't",
""
]
] | Trans-Planckian particles are elementary particles accelerated such that their energies surpass the Planck value. There are several reasons to believe that trans-Planckian particles do not represent independent degrees of freedom in Hilbert space, but they are controlled by the cis-Planckian particles. A way to learn m... |
2308.09508 | Jakkrit Sangtawee | Saikat Chakraborty, Khamphee Karwan and Jakkrit Sangtawee | Observational predictions of inflationary model in spatially covariant
gravity with two tensorial degrees of freedom for gravity | 18 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the inflationary model constructed from a Spatially Covariant
Gravity (SCG). The Lagrangian for the SCG in our consideration is expressed as
the polynomial of irreducible SCG monomials where the total number of
derivatives of each monomial is two, and the theory propagates two tensorial
degrees of freedom of... | [
{
"created": "Fri, 18 Aug 2023 12:36:53 GMT",
"version": "v1"
}
] | 2023-08-22 | [
[
"Chakraborty",
"Saikat",
""
],
[
"Karwan",
"Khamphee",
""
],
[
"Sangtawee",
"Jakkrit",
""
]
] | We study the inflationary model constructed from a Spatially Covariant Gravity (SCG). The Lagrangian for the SCG in our consideration is expressed as the polynomial of irreducible SCG monomials where the total number of derivatives of each monomial is two, and the theory propagates two tensorial degrees of freedom of g... |
gr-qc/0607075 | Benjamin Bahr | Benjamin Bahr, Thomas Thiemann | Approximating the physical inner product of Loop Quantum Cosmology | 35 pages | Class.Quant.Grav.24:2109-2138,2007 | 10.1088/0264-9381/24/8/011 | null | gr-qc | null | In this article, we investigate the possibility of approximating the physical
inner product of constrained quantum theories. In particular, we calculate the
physical inner product of a simple cosmological model in two ways: Firstly, we
compute it analytically via a trick, secondly, we use the complexifier coherent
st... | [
{
"created": "Wed, 19 Jul 2006 19:49:20 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bahr",
"Benjamin",
""
],
[
"Thiemann",
"Thomas",
""
]
] | In this article, we investigate the possibility of approximating the physical inner product of constrained quantum theories. In particular, we calculate the physical inner product of a simple cosmological model in two ways: Firstly, we compute it analytically via a trick, secondly, we use the complexifier coherent stat... |
gr-qc/0010099 | Wanas | M. I. Wanas | Parameterized Absolute Parallelism: A Geometry for Physical Applications | 17 pages Tex file | Turk.J.Phys. 24 (2000) 473-488 | null | null | gr-qc | null | Absolute parallelism (AP) geometry is frequently used for physical
applications. Although it is wider than Riemannian geometry, it has two main
defects. The first is that its path equation does not represent physical
trajectories of any test particle. The second is the identical vanishing of its
curvature tensor. The... | [
{
"created": "Thu, 26 Oct 2000 13:43:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wanas",
"M. I.",
""
]
] | Absolute parallelism (AP) geometry is frequently used for physical applications. Although it is wider than Riemannian geometry, it has two main defects. The first is that its path equation does not represent physical trajectories of any test particle. The second is the identical vanishing of its curvature tensor. The p... |
1108.6157 | Mohammad Reza Tanhayi Ahari | Mohammad Reza Tanhayi, Mohsen Fathi and Mohammad Vahid Takook | Observable Quantities in Weyl Gravity | to be appear in MPLA | Mod. Phys. Lett. A 26, No. 32 (2011) 2403 | 10.1142/S0217732311036759 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the cosmological "constant" and the Hubble parameter are
considered in the Weyl theory of gravity, by taking them as functions of $r$
and $t$, respectively. Based on this theory and in the linear approximation, we
obtain the values of $H_0$ and $\Lambda_0$ which are in good agreement with the
known val... | [
{
"created": "Wed, 31 Aug 2011 08:34:22 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Tanhayi",
"Mohammad Reza",
""
],
[
"Fathi",
"Mohsen",
""
],
[
"Takook",
"Mohammad Vahid",
""
]
] | In this paper, the cosmological "constant" and the Hubble parameter are considered in the Weyl theory of gravity, by taking them as functions of $r$ and $t$, respectively. Based on this theory and in the linear approximation, we obtain the values of $H_0$ and $\Lambda_0$ which are in good agreement with the known value... |
1605.00261 | Abdul Jawad | Abdul Jawad, Sadaf Butt and Shamaila Rani | Dynamics of Warm Chaplygin Gas Inflationary Models With Quartic
Potential | 21 pages; 3 figures | Eur. Phys. J. C 76 (2016) 274 | 10.1140/epjc/s10052-016-4121-x | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warm inflationary universe models in the context of generalized chaplygin
gas, modified chaplygin gas, generalized cosmic chaplygin gas are being
studied. The dissipative coefficient of the form $\Gamma\propto T$, weak and
strong dissipative regimes are being considered. We use quartic potential
$\frac{\lambda_{*}\ph... | [
{
"created": "Sun, 1 May 2016 14:46:09 GMT",
"version": "v1"
}
] | 2016-10-27 | [
[
"Jawad",
"Abdul",
""
],
[
"Butt",
"Sadaf",
""
],
[
"Rani",
"Shamaila",
""
]
] | Warm inflationary universe models in the context of generalized chaplygin gas, modified chaplygin gas, generalized cosmic chaplygin gas are being studied. The dissipative coefficient of the form $\Gamma\propto T$, weak and strong dissipative regimes are being considered. We use quartic potential $\frac{\lambda_{*}\phi^... |
2004.14865 | Yurii Ignat'ev | Yu. G. Ignat'ev | The Method of Self-Consistent Field and Macroscopical Einstein Equations
for the Early Universe | 19 page, 39 references. arXiv admin note: text overlap with
arXiv:1908.03488 | Theor. and Math. Physics, 204 (2020) 927 | 10.1134/S0040577920070077 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complete theory of cosmological evolution's macroscopic description is
constructed with a help of self-consistent field. The theory includes a
subsystem of linear equations of perturbations' evolution and nonlinear
macroscopic Einstein equations and equations of a scalar field. We provide
examples of system's sol... | [
{
"created": "Wed, 29 Apr 2020 14:22:18 GMT",
"version": "v1"
}
] | 2020-07-09 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | The complete theory of cosmological evolution's macroscopic description is constructed with a help of self-consistent field. The theory includes a subsystem of linear equations of perturbations' evolution and nonlinear macroscopic Einstein equations and equations of a scalar field. We provide examples of system's solut... |
2201.05183 | Sujoy Modak | Saurya Das, Sujoy K. Modak | A novel mechanism for probing the Planck scale with wavepackets
following general distributions | v2, 27 pages, 6 improved figures, matches published version in
European Physical Journal Plus | Eur. Phys. J. Plus (2023) 138: 366 | 10.1140/epjp/s13360-023-03990-7 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | It was also shown recently that GUP predicts potentially measurable
corrections to the `doubling time' of freely moving Gaussian atomic and
molecular wavepackets with a favorable combination of three parameters, {\it
e.g.} mass, initial width and mean velocity of a travelling wavepacket.
However, it is well known tha... | [
{
"created": "Thu, 13 Jan 2022 19:29:44 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Aug 2023 05:05:15 GMT",
"version": "v2"
}
] | 2023-08-08 | [
[
"Das",
"Saurya",
""
],
[
"Modak",
"Sujoy K.",
""
]
] | It was also shown recently that GUP predicts potentially measurable corrections to the `doubling time' of freely moving Gaussian atomic and molecular wavepackets with a favorable combination of three parameters, {\it e.g.} mass, initial width and mean velocity of a travelling wavepacket. However, it is well known that ... |
2108.13384 | Claudia Lazzaro | G. Vedovato, E. Milotti, G.A. Prodi, S. Bini, M. Drago, V. Gayathri,
O. Halim, C.Lazzaro, D. Lopez, A. Miani, B. O'Brian, F. Salemi, M.
Szczepanczyk, S. Tiwari, A. Virtuoso, S. Klimenko | Minimally-modeled search of higher multipole gravitational-wave
radiation in compact binary coalescence | null | null | 10.1088/1361-6382/ac45da | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | As the Advanced LIGO and Advanced Virgo interferometers, soon to be joined by
the KAGRA interferometer, increase their sensitivity, they detect an
ever-larger number of gravitational waves with a significant presence of higher
multipoles in addition to the dominant $(2, 2)$ multipole. These higher
multipoles can be d... | [
{
"created": "Mon, 30 Aug 2021 17:10:21 GMT",
"version": "v1"
}
] | 2022-02-09 | [
[
"Vedovato",
"G.",
""
],
[
"Milotti",
"E.",
""
],
[
"Prodi",
"G. A.",
""
],
[
"Bini",
"S.",
""
],
[
"Drago",
"M.",
""
],
[
"Gayathri",
"V.",
""
],
[
"Halim",
"O.",
""
],
[
"Lazzaro",
"C.",
""... | As the Advanced LIGO and Advanced Virgo interferometers, soon to be joined by the KAGRA interferometer, increase their sensitivity, they detect an ever-larger number of gravitational waves with a significant presence of higher multipoles in addition to the dominant $(2, 2)$ multipole. These higher multipoles can be det... |
2306.14162 | Gamal G.L. Nashed | Shin'ichi Nojiri and G.G.L. Nashed | Hayward black hole in scalar-Einstein-Gauss-Bonnet gravity in four
dimensions | 13 pages 2 figures, To appear in Phys. Rev. D | null | 10.1103/PhysRevD.108.024014 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the framework of scalar-Einstein-Gauss-Bonnet gravity, we construct the
model which realizes the Hayward black hole and discuss the absence of ghosts
in this model. Because Hayward black hole has two horizons but no curvature
singularity, it may solve the problem of the information loss that might be
generated by ... | [
{
"created": "Sun, 25 Jun 2023 08:12:42 GMT",
"version": "v1"
}
] | 2023-07-19 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Nashed",
"G. G. L.",
""
]
] | In the framework of scalar-Einstein-Gauss-Bonnet gravity, we construct the model which realizes the Hayward black hole and discuss the absence of ghosts in this model. Because Hayward black hole has two horizons but no curvature singularity, it may solve the problem of the information loss that might be generated by bl... |
1801.03428 | Mushtaq Ahmad Sial | M. Farasat Shamir, Mushtaq Ahmad | Gravastars in $f(\mathcal{G},T)$ Gravity | 26 pages, 5 figures, revised version, to appear in PRD | Phys. Rev. D 97, 104031 (2018) | 10.1103/PhysRevD.97.104031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work proposes a stellar model under Gauss-Bonnet $f(\mathcal{G}, T)$
gravity with the conjecture theorised by Mazur and Mottola, well known as the
gravitational vacuum stars (gravastars). By taking into account the
$f(\mathcal{G},T)$ stellar model, the structure of the gravastar with its
exclusive division of th... | [
{
"created": "Wed, 10 Jan 2018 15:46:54 GMT",
"version": "v1"
},
{
"created": "Tue, 22 May 2018 12:53:43 GMT",
"version": "v2"
}
] | 2018-05-24 | [
[
"Shamir",
"M. Farasat",
""
],
[
"Ahmad",
"Mushtaq",
""
]
] | This work proposes a stellar model under Gauss-Bonnet $f(\mathcal{G}, T)$ gravity with the conjecture theorised by Mazur and Mottola, well known as the gravitational vacuum stars (gravastars). By taking into account the $f(\mathcal{G},T)$ stellar model, the structure of the gravastar with its exclusive division of thre... |
1202.1397 | Puxun Wu | Kaituo Zhang, Puxun Wu, Hongwei Yu | Oscillating universe in the DGP braneworld | 25 pages, 24 figures. To appear in PRD | Phys. RevD. 85. 043521 (2012) | 10.1103/PhysRevD.85.043521 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With a method in which the Friedmann equation is written in a form such that
evolution of the scale factor can be treated as that of a particle in a
"potential", we classify all possible cosmic evolutions in the DGP braneworld
scenario with the dark radiation term retained. By assuming that the energy
component is pr... | [
{
"created": "Tue, 7 Feb 2012 11:34:52 GMT",
"version": "v1"
}
] | 2012-10-12 | [
[
"Zhang",
"Kaituo",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | With a method in which the Friedmann equation is written in a form such that evolution of the scale factor can be treated as that of a particle in a "potential", we classify all possible cosmic evolutions in the DGP braneworld scenario with the dark radiation term retained. By assuming that the energy component is pres... |
1012.2188 | Mattias Dahl | Mattias Dahl, Romain Gicquaud, Emmanuel Humbert | A limit equation associated to the solvability of the vacuum Einstein
constraint equations using the conformal method | Proposition 1.6 changed, error in the proof of this result in the
previous version of the article | Duke Math. J. 161, no. 14 (2012), 2669-2697 | 10.1215/00127094-1813182 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Let $(M,g)$ be a compact Riemannian manifold on which a trace-free and
divergence-free $\sigma \in W^{1,p}$ and a positive function $\tau \in
W^{1,p}$, $p > n$, are fixed. In this paper, we study the vacuum Einstein
constraint equations using the well known conformal method with data $\sigma$
and $\tau$. We show that... | [
{
"created": "Fri, 10 Dec 2010 07:02:14 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jan 2011 15:57:30 GMT",
"version": "v2"
}
] | 2019-12-19 | [
[
"Dahl",
"Mattias",
""
],
[
"Gicquaud",
"Romain",
""
],
[
"Humbert",
"Emmanuel",
""
]
] | Let $(M,g)$ be a compact Riemannian manifold on which a trace-free and divergence-free $\sigma \in W^{1,p}$ and a positive function $\tau \in W^{1,p}$, $p > n$, are fixed. In this paper, we study the vacuum Einstein constraint equations using the well known conformal method with data $\sigma$ and $\tau$. We show that i... |
1506.03443 | Ujjal Debnath | Behnam Pourhassan and Ujjal Debnath | Particle Acceleration in Rotating Modified Hayward and Bardeen Black
Holes | 11 pages, 18 figures | Gravitation and Cosmology 25 (2019) 196 | 10.1134/S0202289319020129 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider rotating modified Hayward and rotating modified
Bardeen black holes as particle accelerators. We investigate the center of mass
energy of two colliding neutral particles with same rest masses falling from
rest at infinity to near the horizons of the mentioned black holes. We
investigate the ... | [
{
"created": "Wed, 10 Jun 2015 16:08:47 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2015 13:08:04 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Jun 2015 09:24:26 GMT",
"version": "v3"
}
] | 2019-06-25 | [
[
"Pourhassan",
"Behnam",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this paper we consider rotating modified Hayward and rotating modified Bardeen black holes as particle accelerators. We investigate the center of mass energy of two colliding neutral particles with same rest masses falling from rest at infinity to near the horizons of the mentioned black holes. We investigate the ra... |
1903.02389 | Vladimir Dergachev Ph.D. | Vladimir Dergachev, Maria Alessandra Papa, Benjamin Steltner,
Heinz-Bernd Eggenstein | Loosely coherent search in LIGO O1 data for continuous gravitational
waves from Terzan 5 and the galactic center | null | Phys. Rev. D 99, 084048 (2019) | 10.1103/PhysRevD.99.084048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report results of a search for continuous gravitational waves from a
region covering the globular cluster Terzan 5 and the galactic center.
Continuous gravitational waves are expected from fast-spinning, slightly
non-axisymmetric isolated neutron stars as well as more exotic objects. The
regions that we target are... | [
{
"created": "Wed, 6 Mar 2019 14:06:22 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2019 20:54:35 GMT",
"version": "v2"
}
] | 2019-05-08 | [
[
"Dergachev",
"Vladimir",
""
],
[
"Papa",
"Maria Alessandra",
""
],
[
"Steltner",
"Benjamin",
""
],
[
"Eggenstein",
"Heinz-Bernd",
""
]
] | We report results of a search for continuous gravitational waves from a region covering the globular cluster Terzan 5 and the galactic center. Continuous gravitational waves are expected from fast-spinning, slightly non-axisymmetric isolated neutron stars as well as more exotic objects. The regions that we target are b... |
2012.06401 | Andrzej Sitarz | Arkadiusz Bochniak and Andrzej Sitarz | On stability of Friedmann-Lema\^itre-Robertson-Walker solutions in
doubled geometries | 20 pages | Phys. Rev. D 103, 044041 (2021) | 10.1103/PhysRevD.103.044041 | null | gr-qc hep-th math-ph math.MP math.QA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the models of geometry with discrete spaces as additional
dimensions we investigate the stability of cosmological solutions in models
with two metrics of the Friedmann-Lema\^itre-Robertson-Walker type. We propose
an effective gravity action that couples the two metrics in a similar manner as
in the bimet... | [
{
"created": "Fri, 11 Dec 2020 14:59:42 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jan 2022 08:55:21 GMT",
"version": "v2"
}
] | 2022-01-12 | [
[
"Bochniak",
"Arkadiusz",
""
],
[
"Sitarz",
"Andrzej",
""
]
] | Motivated by the models of geometry with discrete spaces as additional dimensions we investigate the stability of cosmological solutions in models with two metrics of the Friedmann-Lema\^itre-Robertson-Walker type. We propose an effective gravity action that couples the two metrics in a similar manner as in the bimetri... |
gr-qc/9504042 | Chopin Soo | Chopin Soo | Self-dual variables, positive semi-definite action, and discrete
transformations in four-dimensional quantum gravity | 22 pages, LaTeX. Minor corrections. (To appear in Phys. Rev. D.) | Phys.Rev.D52:3484-3493,1995 | 10.1103/PhysRevD.52.3484 | CGPG-95/4-3 | gr-qc hep-th | null | A positive semi-definite Euclidean action for arbitrary four-topologies can
be constructed by adding appropriate Yang-Mills and topological terms to the
Samuel-Jacobson-Smolin action of gravity with (anti)self-dual variables.
Moreover, on-shell, the (anti)self-dual sector of the new theory corresponds
precisely to al... | [
{
"created": "Tue, 25 Apr 1995 17:43:20 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 1995 21:46:36 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Soo",
"Chopin",
""
]
] | A positive semi-definite Euclidean action for arbitrary four-topologies can be constructed by adding appropriate Yang-Mills and topological terms to the Samuel-Jacobson-Smolin action of gravity with (anti)self-dual variables. Moreover, on-shell, the (anti)self-dual sector of the new theory corresponds precisely to all ... |
2004.01243 | Akash Kumar Mishra | Akash K Mishra | Quasinormal modes and Strong Cosmic Censorship in the regularised 4D
Einstein-Gauss-Bonnet gravity | 19 pages, 3 figures | Gen. Relat. Grav. 52 (2020) 106 | 10.1007/s10714-020-02763-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fate of strong cosmic censorship is ultimately linked to the
extendibility of perturbation across the Cauchy Horizon and known to be
violated in the near extremal region of a charged de Sitter black hole. Similar
violations can also be realized in higher curvature theories, with the strength
of violation becoming... | [
{
"created": "Thu, 2 Apr 2020 20:02:35 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Nov 2020 16:56:56 GMT",
"version": "v2"
}
] | 2020-11-10 | [
[
"Mishra",
"Akash K",
""
]
] | The fate of strong cosmic censorship is ultimately linked to the extendibility of perturbation across the Cauchy Horizon and known to be violated in the near extremal region of a charged de Sitter black hole. Similar violations can also be realized in higher curvature theories, with the strength of violation becoming s... |
2206.03824 | Olivier Minazzoli | Olivier Minazzoli | Quantum of action in entangled relativity | 4 pages. v3: substantial rearrangements of the content. Comments
still welcome | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, I show that Planck's quantum of action $\hbar$ varies
proportionally to Newton's constant $G$ in entangled relativity, which
manifests an explicit connection between the quantum and the gravitational
worlds. On the other hand, the quantum parameter that appears in the phase of
the path integral formul... | [
{
"created": "Wed, 8 Jun 2022 11:47:39 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2023 16:13:22 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Feb 2023 09:57:50 GMT",
"version": "v3"
}
] | 2023-02-21 | [
[
"Minazzoli",
"Olivier",
""
]
] | In this letter, I show that Planck's quantum of action $\hbar$ varies proportionally to Newton's constant $G$ in entangled relativity, which manifests an explicit connection between the quantum and the gravitational worlds. On the other hand, the quantum parameter that appears in the phase of the path integral formulat... |
1107.2316 | Benjamin Lenoir | Benjamin Lenoir, Bruno Christophe, Agn\`es L\'evy, Bernard Foulon,
Serge Reynaud, Jean-Michel Courty, Brahim Lamine, Hansj\"org Dittus, Tim van
Zoest, Claus L\"ammerzahl, Hanns Selig, Sylvie L\'eon-Hirtz, Richard
Biancale, Gilles M\'etris, Frank Sohl, Peter Wohl | Odyssey 2 : A mission toward Neptune and Triton to test General
Relativity | 61st International Astronautical Congress (Prague, Czech Republic -
September 2010), 7 pages | 61st International Astronautical Congress, (IAC, 2011)
IAC-10.A3.6.5 | null | null | gr-qc astro-ph.EP physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Odyssey 2 will be proposed in December 2010 for the next call of M3 missions
for Cosmic Vision 2015-2025. This mission, under a Phase 0 study performed by
CNES, will aim at Neptune and Triton. Two sets of objectives will be pursued.
The first one is to perform a set of gravitation experiments at the Solar
System scal... | [
{
"created": "Tue, 12 Jul 2011 15:11:52 GMT",
"version": "v1"
}
] | 2014-09-16 | [
[
"Lenoir",
"Benjamin",
""
],
[
"Christophe",
"Bruno",
""
],
[
"Lévy",
"Agnès",
""
],
[
"Foulon",
"Bernard",
""
],
[
"Reynaud",
"Serge",
""
],
[
"Courty",
"Jean-Michel",
""
],
[
"Lamine",
"Brahim",
""
],
... | Odyssey 2 will be proposed in December 2010 for the next call of M3 missions for Cosmic Vision 2015-2025. This mission, under a Phase 0 study performed by CNES, will aim at Neptune and Triton. Two sets of objectives will be pursued. The first one is to perform a set of gravitation experiments at the Solar System scale.... |
2107.05797 | Baofei Li | Kristina Giesel, Bao-Fei Li, Parampreet Singh | Non-singular quantum gravitational dynamics of an LTB dust shell model:
the role of quantization prescriptions | 20 pages and 5 figures | null | 10.1103/PhysRevD.104.106017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some consequences of the loop quantization of the outermost dust
shell in the Lema\^itre-Tolman-Bondi spacetime with a homogeneous dust density
using different quantization strategies motivated by loop quantum gravity.
Prior work has dealt with loop quantizing this model by employing holonomies
and the triad... | [
{
"created": "Tue, 13 Jul 2021 00:56:22 GMT",
"version": "v1"
}
] | 2021-12-15 | [
[
"Giesel",
"Kristina",
""
],
[
"Li",
"Bao-Fei",
""
],
[
"Singh",
"Parampreet",
""
]
] | We study some consequences of the loop quantization of the outermost dust shell in the Lema\^itre-Tolman-Bondi spacetime with a homogeneous dust density using different quantization strategies motivated by loop quantum gravity. Prior work has dealt with loop quantizing this model by employing holonomies and the triads,... |
gr-qc/9508024 | Alejandro Jakubi | Luis P. Chimento and Alejandro S. Jakubi | Scalar Field Cosmologies with Viscous Fluid | 8 pages, LaTeX. To be published in International Journal of Modern
Physics D | Int.J.Mod.Phys. D5 (1996) 313-318 | 10.1142/S0218271896000217 | null | gr-qc | null | We investigate cosmological models with a free scalar field and a viscous
fluid. We find exact solutions for a linear and nonlinear viscosity pressure.
Both yield singular and bouncing solutions. In the first regime, a de Sitter
stage is asymptotically stable, while in the second case we find power-law
evolutions for... | [
{
"created": "Tue, 8 Aug 1995 22:44:17 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Chimento",
"Luis P.",
""
],
[
"Jakubi",
"Alejandro S.",
""
]
] | We investigate cosmological models with a free scalar field and a viscous fluid. We find exact solutions for a linear and nonlinear viscosity pressure. Both yield singular and bouncing solutions. In the first regime, a de Sitter stage is asymptotically stable, while in the second case we find power-law evolutions for v... |
gr-qc/0201071 | L. C. Garcia de Andrade | L.C. Garcia de Andrade (Departamento de Fisica Teorica-IF-UERJ) | Gravitational Stability of inflaton and torsion in
Einstein-Cartan-Klein-Gordon cosmology with kinky potentials | Latex file | null | null | null | gr-qc | null | Gravitational stability of torsion and inflaton field in a four-dimensional
spacetime de Sitter solution in scalar-tensor cosmology where Cartan torsion
propagates is investigated in detail. Inflaton and torsion evolution equations
are derived by making use of a Lagrangean method. Stable and unstable modes for
torsio... | [
{
"created": "Mon, 21 Jan 2002 23:51:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
"",
"Departamento de Fisica Teorica-IF-UERJ"
]
] | Gravitational stability of torsion and inflaton field in a four-dimensional spacetime de Sitter solution in scalar-tensor cosmology where Cartan torsion propagates is investigated in detail. Inflaton and torsion evolution equations are derived by making use of a Lagrangean method. Stable and unstable modes for torsion ... |
0711.1299 | Alberto Carrasco Ferreira | Alberto Carrasco, Marc Mars | On marginally outer trapped surfaces in stationary and static spacetimes | 22 pages, 3 figures; 1 reference added, 1 figure changed, other minor
changes | Class.Quant.Grav.25:055011,2008 | 10.1088/0264-9381/25/5/055011 | null | gr-qc | null | In this paper we prove that for any spacelike hypersurface containing an
untrapped barrier in a stationary spacetime satisfying the null energy
condition, any marginally outer trapped surface cannot lie in the exterior
region where the stationary Killing vector is timelike. In the static case we
prove that any margin... | [
{
"created": "Thu, 8 Nov 2007 16:32:03 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Nov 2007 13:08:47 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Carrasco",
"Alberto",
""
],
[
"Mars",
"Marc",
""
]
] | In this paper we prove that for any spacelike hypersurface containing an untrapped barrier in a stationary spacetime satisfying the null energy condition, any marginally outer trapped surface cannot lie in the exterior region where the stationary Killing vector is timelike. In the static case we prove that any marginal... |
gr-qc/9702051 | John Baez | John C. Baez | Degenerate Solutions of General Relativity from Topological Field Theory | 16 pages LaTeX, uses diagram.sty and auxdefs.sty macros, 2
encapsulated Postscript figures | Commun.Math.Phys. 193 (1998) 219-231 | 10.1007/s002200050326 | null | gr-qc hep-th math.QA q-alg | null | Working in the Palatini formalism, we describe a procedure for constructing
degenerate solutions of general relativity on 4-manifold M from certain
solutions of 2-dimensional BF theory on any framed surface Sigma embedded in M.
In these solutions the cotetrad field e (and thus the metric) vanishes outside
a neighborh... | [
{
"created": "Tue, 25 Feb 1997 03:15:21 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Baez",
"John C.",
""
]
] | Working in the Palatini formalism, we describe a procedure for constructing degenerate solutions of general relativity on 4-manifold M from certain solutions of 2-dimensional BF theory on any framed surface Sigma embedded in M. In these solutions the cotetrad field e (and thus the metric) vanishes outside a neighborhoo... |
gr-qc/9404064 | null | Lajos Di\'osi | Comments on Omn\`es' Model for Uniqueness of Data | 5 pages Latex, 30-April-1994 | Phys.Lett. 192A (1994) 301-303 | 10.1016/0375-9601(94)90263-1 | null | gr-qc | null | Standard methods of the theory of permanent state reduction are shown to
offer an alternative realization of Omn\`es' project. Our proposal, as simple
as Omn\`es' one, possesses closed master equation for the ensemble density
operator, assuring causality.
| [
{
"created": "Sat, 30 Apr 1994 18:13:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Diósi",
"Lajos",
""
]
] | Standard methods of the theory of permanent state reduction are shown to offer an alternative realization of Omn\`es' project. Our proposal, as simple as Omn\`es' one, possesses closed master equation for the ensemble density operator, assuring causality. |
1604.04718 | Anna Nakonieczna | Anna Nakonieczna, Dong-han Yeom | Scalar field as an intrinsic time measure in coupled dynamical
matter-geometry systems. II. Electrically charged gravitational collapse | 31 pages, 15 figures | JHEP05(2016)155 | 10.1007/JHEP05(2016)155 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Investigating the dynamics of gravitational systems, especially in the regime
of quantum gravity, poses a problem of measuring time during the evolution. One
of the approaches to this issue is using one of the internal degrees of freedom
as a time variable. The objective of our research was to check whether a scalar
... | [
{
"created": "Sat, 16 Apr 2016 10:36:01 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jun 2016 07:01:15 GMT",
"version": "v2"
}
] | 2016-06-06 | [
[
"Nakonieczna",
"Anna",
""
],
[
"Yeom",
"Dong-han",
""
]
] | Investigating the dynamics of gravitational systems, especially in the regime of quantum gravity, poses a problem of measuring time during the evolution. One of the approaches to this issue is using one of the internal degrees of freedom as a time variable. The objective of our research was to check whether a scalar fi... |
gr-qc/9906117 | J. W. van Holten | J.W. van Holten | Cyclotron motion in a gravitational-wave background | 9 pages, no figures | null | null | NIKHEF/99-019 | gr-qc | null | We examine the motion of a relativistic charged particle in a constant
magnetic field perturbed by gravitational waves incident along the direction of
the magnetic field. We apply a generalized energy conservation law to compute
the variations of the kinetic energy of the particle during passage of the
waves. We also... | [
{
"created": "Tue, 29 Jun 1999 13:59:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"van Holten",
"J. W.",
""
]
] | We examine the motion of a relativistic charged particle in a constant magnetic field perturbed by gravitational waves incident along the direction of the magnetic field. We apply a generalized energy conservation law to compute the variations of the kinetic energy of the particle during passage of the waves. We also e... |
gr-qc/9701053 | Anders H\"oglund | S. Brian Edgar (University of Link\"oping), Garry Ludwig (University
of Alberta) | Integration in the GHP formalism III: Finding all conformally flat
radiation metrics as an example of an `optimal situation' | 22 pages, plain TeX | Gen.Rel.Grav. 29 (1997) 1309-1328 | 10.1023/A:1018820031537 | null | gr-qc | null | Held has proposed an integration procedure within the GHP formalism built
around four real, functionally independent, zero-weighted scalars. He suggests
that such a procedure would be particularly simple for the `optimal situation',
when the formalism directly supplies the full quota of four scalars of this
type; a s... | [
{
"created": "Fri, 24 Jan 1997 11:02:11 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Edgar",
"S. Brian",
"",
"University of Linköping"
],
[
"Ludwig",
"Garry",
"",
"University\n of Alberta"
]
] | Held has proposed an integration procedure within the GHP formalism built around four real, functionally independent, zero-weighted scalars. He suggests that such a procedure would be particularly simple for the `optimal situation', when the formalism directly supplies the full quota of four scalars of this type; a spa... |
0907.3941 | Sante Carloni Dr | Sante Carloni, Emilio Elizalde, Sergei Odintsov | Conformal Transformations in Cosmology of Modified Gravity: the
Covariant Approach Perspective | 26 pages, 8 figures | Gen.Rel.Grav.42:1667-1705,2010 | 10.1007/s10714-010-0936-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The 1+3 covariant approach and the covariant gauge-invariant approach to
perturbations are used to analyze in depth conformal transformations in
cosmology. Such techniques allow us to obtain very interesting insights on the
physical content of these transformations, when applied to non-standard
gravity. The results o... | [
{
"created": "Thu, 23 Jul 2009 14:29:35 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Oct 2009 14:26:23 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Carloni",
"Sante",
""
],
[
"Elizalde",
"Emilio",
""
],
[
"Odintsov",
"Sergei",
""
]
] | The 1+3 covariant approach and the covariant gauge-invariant approach to perturbations are used to analyze in depth conformal transformations in cosmology. Such techniques allow us to obtain very interesting insights on the physical content of these transformations, when applied to non-standard gravity. The results obt... |
1108.1728 | Dario Bettoni | Dario Bettoni, Stefano Liberati, Lorenzo Sindoni | Extended LCDM: generalized non-minimal coupling for dark matter fluids | 15 pages, more references added, minor changes, accepted for
publication on JCAP | JCAP11(2011)007 | 10.1088/1475-7516/2011/11/007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss a class of models that address the issue of
explaining the gravitational dynamics at the galactic scale starting from a
geometric point of view. Instead of claiming the existence of some hidden
coupling between dark matter and baryons, or abandoning the existence of dark
matter itself, we con... | [
{
"created": "Mon, 8 Aug 2011 15:05:05 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Oct 2011 12:06:32 GMT",
"version": "v2"
}
] | 2011-11-10 | [
[
"Bettoni",
"Dario",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | In this paper we discuss a class of models that address the issue of explaining the gravitational dynamics at the galactic scale starting from a geometric point of view. Instead of claiming the existence of some hidden coupling between dark matter and baryons, or abandoning the existence of dark matter itself, we consi... |
1606.01801 | Philipp Roser | Philipp Roser and Antony Valentini | Cosmological history in York time: inflation and perturbations | 10 pages, 1 figure | null | 10.1007/s10714-016-2180-9 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The constant mean extrinsic curvature on a spacelike slice may constitute a
physically preferred time coordinate, `York time'. One line of enquiry to probe
this idea is to understand processes in our cosmological history in terms of
York time. Following a review of the theoretical motivations, we focus on
slow-roll i... | [
{
"created": "Mon, 6 Jun 2016 15:59:17 GMT",
"version": "v1"
}
] | 2017-01-25 | [
[
"Roser",
"Philipp",
""
],
[
"Valentini",
"Antony",
""
]
] | The constant mean extrinsic curvature on a spacelike slice may constitute a physically preferred time coordinate, `York time'. One line of enquiry to probe this idea is to understand processes in our cosmological history in terms of York time. Following a review of the theoretical motivations, we focus on slow-roll inf... |
gr-qc/9506024 | Leonid V. Verozub | L.V.Verozub | Gravitational-Wave Detector for a Space Laboratory | 11 pages, Latex 2.O9, 2 figures (inside Latex file) | null | null | null | gr-qc | null | A new method of gravitational- waves detection in the $10^{-2}\div 10^{-1}
Hz$ band for a space laboratory is proposed based on the use of the Kozorez
effect in the magnetic interaction of superconducting solenoids.
| [
{
"created": "Sat, 10 Jun 1995 16:29:30 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jun 1995 20:15:20 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jun 1995 21:40:07 GMT",
"version": "v3"
}
] | 2008-06-24 | [
[
"Verozub",
"L. V.",
""
]
] | A new method of gravitational- waves detection in the $10^{-2}\div 10^{-1} Hz$ band for a space laboratory is proposed based on the use of the Kozorez effect in the magnetic interaction of superconducting solenoids. |
1903.06028 | Elsa Teixeira | Elsa M. Teixeira, Ana Nunes and Nelson J. Nunes | Conformally Coupled Tachyonic Dark Energy | 18 pages, 7 figures. V3: Matches published version | Phys. Rev. D 100, 043539 (2019) | 10.1103/PhysRevD.100.043539 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and study a conformally coupled dark energy model, characterised
by an interaction between a tachyon field $\phi$, with an inverse square
potential $V (\phi)$, and the matter sector. A detailed analysis of the
cosmological outcome reveals different possibilities, in contrast with the
previously studied unc... | [
{
"created": "Tue, 12 Mar 2019 17:54:11 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Sep 2019 22:37:41 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Sep 2019 12:34:00 GMT",
"version": "v3"
}
] | 2019-09-06 | [
[
"Teixeira",
"Elsa M.",
""
],
[
"Nunes",
"Ana",
""
],
[
"Nunes",
"Nelson J.",
""
]
] | We present and study a conformally coupled dark energy model, characterised by an interaction between a tachyon field $\phi$, with an inverse square potential $V (\phi)$, and the matter sector. A detailed analysis of the cosmological outcome reveals different possibilities, in contrast with the previously studied uncou... |
2105.04239 | Adolfo Cisterna A.C | Adolfo Cisterna, Carla Henr\'iquez-B\'aez, Nicol\'as Mora and Leonardo
Sanhueza | Quasitopological electromagnetism: Reissner-Nordstr\"om black strings in
Einstein and Lovelock gravities | References added. Matches published version | Phys. Rev. D 104, 064055 (2021) | 10.1103/PhysRevD.104.064055 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, we provide consistent compactifications of Einstein-Maxwell and
Einstein-Maxwell-Lovelock theories on direct product spacetimes of the form
$\mathcal{M}_D=\mathcal{M}_d\times\mathcal{K}^{p}$, where $\mathcal{K}^p$ is a
Euclidean internal manifold of constant curvature. For these compactifications
to tak... | [
{
"created": "Mon, 10 May 2021 10:11:37 GMT",
"version": "v1"
},
{
"created": "Thu, 13 May 2021 09:46:00 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Sep 2021 08:22:15 GMT",
"version": "v3"
}
] | 2021-09-29 | [
[
"Cisterna",
"Adolfo",
""
],
[
"Henríquez-Báez",
"Carla",
""
],
[
"Mora",
"Nicolás",
""
],
[
"Sanhueza",
"Leonardo",
""
]
] | In this work, we provide consistent compactifications of Einstein-Maxwell and Einstein-Maxwell-Lovelock theories on direct product spacetimes of the form $\mathcal{M}_D=\mathcal{M}_d\times\mathcal{K}^{p}$, where $\mathcal{K}^p$ is a Euclidean internal manifold of constant curvature. For these compactifications to take ... |
1312.3617 | Paul McGrath | Paul L. McGrath, Melanie Chanona, Richard J. Epp, Michael J. Koop and
Robert B. Mann | Post-Newtonian Conservation Laws in Rigid Quasilocal Frames | 22 pages, 2 figures | null | 10.1088/0264-9381/31/9/095006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent work we constructed completely general conservation laws for energy
and linear and angular momentum of extended systems in general relativity based
on the notion of a rigid quasilocal frame (RQF). We argued at a fundamental
level that these RQF conservation laws are superior to conservation laws based
on th... | [
{
"created": "Thu, 12 Dec 2013 20:38:21 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jan 2014 20:13:38 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"McGrath",
"Paul L.",
""
],
[
"Chanona",
"Melanie",
""
],
[
"Epp",
"Richard J.",
""
],
[
"Koop",
"Michael J.",
""
],
[
"Mann",
"Robert B.",
""
]
] | In recent work we constructed completely general conservation laws for energy and linear and angular momentum of extended systems in general relativity based on the notion of a rigid quasilocal frame (RQF). We argued at a fundamental level that these RQF conservation laws are superior to conservation laws based on the ... |
2202.08442 | Bob Holdom | Bob Holdom | 2-2-holes simplified | 17 pages, 3 figures | Physics Letters B 830 (2022) 137142 | 10.1016/j.physletb.2022.137142 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Quadratic gravity illustrates how a replacement for black holes can emerge
from a UV completion of gravity. 2-2-holes are extremely compact horizonless
objects with an entropy $S_{22}$ due to trapped normal matter, and in this way
they are conceptually easy to understand. But the field equations are
cumbersome and th... | [
{
"created": "Thu, 17 Feb 2022 04:18:48 GMT",
"version": "v1"
},
{
"created": "Wed, 11 May 2022 02:21:55 GMT",
"version": "v2"
}
] | 2022-05-12 | [
[
"Holdom",
"Bob",
""
]
] | Quadratic gravity illustrates how a replacement for black holes can emerge from a UV completion of gravity. 2-2-holes are extremely compact horizonless objects with an entropy $S_{22}$ due to trapped normal matter, and in this way they are conceptually easy to understand. But the field equations are cumbersome and the ... |
1805.11024 | Douglas A. Singleton | J.A.S Lima and Douglas Singleton | Matter-antimatter asymmetry and other cosmological puzzles via running
vacuum cosmologies | 11 pages revtex4. Accepted for publication in IJMPD | null | 10.1142/S0218271818430162 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current astronomical observations are successfully explained by the present
cosmological paradigm based on the concordance model ($\Lambda_0$CDM +
Inflation). However, such a scenario is composed of a heterogeneous mix of
ingredients for describing the different stages of cosmological evolution.
Particularly, it does... | [
{
"created": "Thu, 24 May 2018 05:03:06 GMT",
"version": "v1"
}
] | 2018-08-29 | [
[
"Lima",
"J. A. S",
""
],
[
"Singleton",
"Douglas",
""
]
] | Current astronomical observations are successfully explained by the present cosmological paradigm based on the concordance model ($\Lambda_0$CDM + Inflation). However, such a scenario is composed of a heterogeneous mix of ingredients for describing the different stages of cosmological evolution. Particularly, it does n... |
0803.1980 | Larry Ford | R. T. Thompson and L. H. Ford | Enhanced Black Hole Horizon Fluctuations | 35 pages, 2 figures | Phys.Rev.D78:024014,2008 | 10.1103/PhysRevD.78.024014 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the possible role of quantum horizon fluctuations on black hole
radiance, especially whether they can invalidate Hawking's analysis based upon
transplanckian modes. We are particularly concerned with ``enhanced''
fluctuations produced by gravitons or matter fields in squeezed vacuum states
sent into the bl... | [
{
"created": "Thu, 13 Mar 2008 14:49:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Thompson",
"R. T.",
""
],
[
"Ford",
"L. H.",
""
]
] | We discuss the possible role of quantum horizon fluctuations on black hole radiance, especially whether they can invalidate Hawking's analysis based upon transplanckian modes. We are particularly concerned with ``enhanced'' fluctuations produced by gravitons or matter fields in squeezed vacuum states sent into the blac... |
gr-qc/0406114 | Tomislav Prokopec | Bjorn Garbrecht and Tomislav Prokopec (Heidelberg University) | Energy Density in Expanding Universes as Seen by Unruh's Detector | 15 pages, 1 figure | Phys.Rev. D70 (2004) 083529 | 10.1103/PhysRevD.70.083529 | HD-THEP-04-26 | gr-qc astro-ph hep-th | null | We consider the response of an Unruh detector to scalar fields in an
expanding space-time. When combining transition elements of the scalar field
Hamiltonian with the interaction operator of detector and field, one finds at
second order in time-dependent perturbation theory a transition amplitude,
which actually domi... | [
{
"created": "Mon, 28 Jun 2004 15:02:25 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Garbrecht",
"Bjorn",
"",
"Heidelberg University"
],
[
"Prokopec",
"Tomislav",
"",
"Heidelberg University"
]
] | We consider the response of an Unruh detector to scalar fields in an expanding space-time. When combining transition elements of the scalar field Hamiltonian with the interaction operator of detector and field, one finds at second order in time-dependent perturbation theory a transition amplitude, which actually domina... |
0903.3733 | Edward Porter | Jonathan R. Gair, Edward K. Porter | Cosmic Swarms: A search for Supermassive Black Holes in the LISA data
stream with a Hybrid Evolutionary Algorithm | submitted to Classical & Quantum Gravity. 19 pages, 4 figures | Class.Quant.Grav.26:225004,2009 | 10.1088/0264-9381/26/22/225004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a hybrid evolutionary algorithm that can simultaneously search
for multiple supermassive black hole binary (SMBHB) inspirals in LISA data. The
algorithm mixes evolutionary computation, Metropolis-Hastings methods and
Nested Sampling. The inspiral of SMBHBs presents an interesting problem for
gravitational... | [
{
"created": "Sun, 22 Mar 2009 16:05:23 GMT",
"version": "v1"
}
] | 2010-02-03 | [
[
"Gair",
"Jonathan R.",
""
],
[
"Porter",
"Edward K.",
""
]
] | We describe a hybrid evolutionary algorithm that can simultaneously search for multiple supermassive black hole binary (SMBHB) inspirals in LISA data. The algorithm mixes evolutionary computation, Metropolis-Hastings methods and Nested Sampling. The inspiral of SMBHBs presents an interesting problem for gravitational w... |
2308.08580 | Muhammad Sharif | M. Sharif and Arooj Fatima | Impact of Charge on Traversable Wormhole Solutions in $f(R,T)$ Theory | 21 pages, 5 figures | Eur. Phys. J. Plus 138(2023)721 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper examines the effects of charge on traversable wormhole structure
in $f(R,T)$ theory. For this purpose, we use the embedding class-I approach to
build a wormhole shape function from the static spherically symmetric
spacetime. The developed shape function satisfies all the required conditions
and connects tw... | [
{
"created": "Wed, 16 Aug 2023 13:36:51 GMT",
"version": "v1"
}
] | 2023-08-21 | [
[
"Sharif",
"M.",
""
],
[
"Fatima",
"Arooj",
""
]
] | This paper examines the effects of charge on traversable wormhole structure in $f(R,T)$ theory. For this purpose, we use the embedding class-I approach to build a wormhole shape function from the static spherically symmetric spacetime. The developed shape function satisfies all the required conditions and connects two ... |
1206.1128 | Li Qin | Li Qin, Yongge Ma | Coherent State Functional Integral in Loop Quantum Cosmology:
Alternative Dynamics | 10 pages. arXiv admin note: substantial text overlap with
arXiv:1110.5480 | Modern Phys. Lett. A, 27 (2012) 1250078 | 10.1142/S0217732312500782 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coherent state functional integral for the minisuperspace model of loop
quantum cosmology is studied. By the well-established canonical theory, the
transition amplitude in the path integral representation of loop quantum
cosmology with alternative dynamics can be formulated through group averaging.
The effective acti... | [
{
"created": "Wed, 6 Jun 2012 06:37:37 GMT",
"version": "v1"
}
] | 2012-06-07 | [
[
"Qin",
"Li",
""
],
[
"Ma",
"Yongge",
""
]
] | Coherent state functional integral for the minisuperspace model of loop quantum cosmology is studied. By the well-established canonical theory, the transition amplitude in the path integral representation of loop quantum cosmology with alternative dynamics can be formulated through group averaging. The effective action... |
1202.0853 | Pablo Jimeno Romero | J. A. R. Cembranos, A. de la Cruz-Dombriz, P. Jimeno Romero | Modified spinning black holes | 4 pages, 6 figures, Contribution to the ERE2011 Spanish Relativity
Meeting, Madrid 2011 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of f(R) modified gravity theories we determine that the black
holes existence is determined by the sign of a parameter dependent of the mass,
the charge, the spin and the scalar curvature. We obtain the different
astrophysical objects derived from the presence of different horizons.
Thermodynamics for ... | [
{
"created": "Sat, 4 Feb 2012 01:09:15 GMT",
"version": "v1"
}
] | 2012-02-07 | [
[
"Cembranos",
"J. A. R.",
""
],
[
"de la Cruz-Dombriz",
"A.",
""
],
[
"Romero",
"P. Jimeno",
""
]
] | In the context of f(R) modified gravity theories we determine that the black holes existence is determined by the sign of a parameter dependent of the mass, the charge, the spin and the scalar curvature. We obtain the different astrophysical objects derived from the presence of different horizons. Thermodynamics for th... |
2002.03394 | P. A. Gonzalez | P. A. Gonz\'alez, Marco Olivares, Eleftherios Papantonopoulos and
Yerko V\'asquez | Constraints on Scalar-Tensor Theory of Gravity by Solar System Tests | Version accepted for publication in EPJC | null | 10.1140/epjc/s10052-020-08536-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of particles in the background of a scalar-tensor theory
of gravity in which the scalar field is kinetically coupled to Einstein tensor.
We constrain the value of the derivative parameter $z$ through solar system
tests. By considering the perihelion precession we obtain the constrain
$\sqrt{z}/m_p... | [
{
"created": "Sun, 9 Feb 2020 16:16:28 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Oct 2020 01:08:11 GMT",
"version": "v2"
}
] | 2020-12-02 | [
[
"González",
"P. A.",
""
],
[
"Olivares",
"Marco",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Vásquez",
"Yerko",
""
]
] | We study the motion of particles in the background of a scalar-tensor theory of gravity in which the scalar field is kinetically coupled to Einstein tensor. We constrain the value of the derivative parameter $z$ through solar system tests. By considering the perihelion precession we obtain the constrain $\sqrt{z}/m_p >... |
1405.4634 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi | Vacuum condition and the relation between response parameter and anomaly
coefficient in (1+3) dimensions | Comments added, to appear in JHEP | JHEP 1408(2014)045 | 10.1007/JHEP08(2014)045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The role of Israel-Hartle-Hawking vacuum is discussed for anomalous fluid in
presence of both the gauge and gravitational anomalies in ($1+3$) dimensions. I
show that imposition of this vacuum condition leads to the relation
$\tilde{c}_{4d}=-8\pi^2c_m$ between the response parameter ($\tilde{c}_{4d}$)
and the anomaly... | [
{
"created": "Mon, 19 May 2014 08:17:41 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jul 2014 18:41:32 GMT",
"version": "v2"
}
] | 2014-08-08 | [
[
"Majhi",
"Bibhas Ranjan",
""
]
] | The role of Israel-Hartle-Hawking vacuum is discussed for anomalous fluid in presence of both the gauge and gravitational anomalies in ($1+3$) dimensions. I show that imposition of this vacuum condition leads to the relation $\tilde{c}_{4d}=-8\pi^2c_m$ between the response parameter ($\tilde{c}_{4d}$) and the anomaly c... |
1710.03945 | Mingzhe Li | Liuyuan Shen, Yicen Mou, Yunlong Zheng, Mingzhe Li | Direct couplings of mimetic dark matter and their cosmological effects | 8 pages, references are updated, the version to be published in
Chinese Physics C | null | 10.1088/1674-1137/42/1/015101 | USTC-ICTS-17-09 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The original mimetic model was proposed to take the role of dark matter. In
this paper we consider possible direct interactions of the mimetic dark matter
with other matter in the universe, especially the standard model particles such
as baryons and photons. By imposing shift symmetry, the mimetic dark matter
field c... | [
{
"created": "Wed, 11 Oct 2017 07:36:20 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Oct 2017 13:03:57 GMT",
"version": "v2"
}
] | 2018-01-17 | [
[
"Shen",
"Liuyuan",
""
],
[
"Mou",
"Yicen",
""
],
[
"Zheng",
"Yunlong",
""
],
[
"Li",
"Mingzhe",
""
]
] | The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of the mimetic dark matter with other matter in the universe, especially the standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can... |
2402.11439 | Javier Roulet | Javier Roulet and Tejaswi Venumadhav | Inferring Binary Properties from Gravitational Wave Signals | 28 pages, 3 figures. Accepted for publication in Annual Review of
Nuclear and Particle Science. v2: GW200115 reanalyzed in Figure 2, to fix an
issue with corrupted high-frequency data; plus minor edits | null | 10.1146/annurev-nucl-121423-100725 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This review provides a conceptual and technical survey of methods for
parameter estimation of gravitational wave signals in ground-based
interferometers such as LIGO and Virgo. We introduce the framework of Bayesian
inference and provide an overview of models for the generation and detection of
gravitational waves fr... | [
{
"created": "Sun, 18 Feb 2024 03:30:32 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jun 2024 00:11:25 GMT",
"version": "v2"
}
] | 2024-07-01 | [
[
"Roulet",
"Javier",
""
],
[
"Venumadhav",
"Tejaswi",
""
]
] | This review provides a conceptual and technical survey of methods for parameter estimation of gravitational wave signals in ground-based interferometers such as LIGO and Virgo. We introduce the framework of Bayesian inference and provide an overview of models for the generation and detection of gravitational waves from... |
1909.05804 | Anuradha Gupta | Anuradha Gupta, Davide Gerosa, K. G. Arun, Emanuele Berti, Will Farr,
B. S. Sathyaprakash | Black holes in the low mass gap: Implications for gravitational wave
observations | 8 pages, 4 figures, 1 table. v4: matches the version accepted for
publication in Phys. Rev. D | null | 10.1103/PhysRevD.101.103036 | LIGO-P1900271 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary neutron-star mergers will predominantly produce black-hole remnants of
mass $\sim 3-4\,M_{\odot}$, thus populating the putative \emph{low mass gap}
between neutron stars and stellar-mass black holes. If these low-mass black
holes are in dense astrophysical environments, mass segregation could lead to
"second-g... | [
{
"created": "Thu, 12 Sep 2019 17:01:12 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2020 00:42:31 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Feb 2020 21:16:49 GMT",
"version": "v3"
},
{
"created": "Thu, 7 May 2020 19:15:39 GMT",
"version": "v4"
}
] | 2020-06-10 | [
[
"Gupta",
"Anuradha",
""
],
[
"Gerosa",
"Davide",
""
],
[
"Arun",
"K. G.",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Farr",
"Will",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Binary neutron-star mergers will predominantly produce black-hole remnants of mass $\sim 3-4\,M_{\odot}$, thus populating the putative \emph{low mass gap} between neutron stars and stellar-mass black holes. If these low-mass black holes are in dense astrophysical environments, mass segregation could lead to "second-gen... |
2208.02965 | Yitian Chen | Yitian Chen, Prayush Kumar, Neev Khera, Nils Deppe, Arnab Dhani,
Michael Boyle, Matthew Giesler, Lawrence E. Kidder, Harald P. Pfeiffer, Mark
A. Scheel, and Saul A. Teukolsky | Multipole moments on the common horizon in a binary-black-hole
simulation | 23 pages, 17 figures, 2 tables | null | 10.1103/PhysRevD.106.124045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the covariantly defined multipole moments on the common horizon
of an equal-mass, non-spinning, quasicircular binary-black-hole system. We see
a strong correlation between these multipole moments and the gravitational
waveform. We find that the multipole moments are well described by the
fundamental quas... | [
{
"created": "Fri, 5 Aug 2022 03:29:05 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Chen",
"Yitian",
""
],
[
"Kumar",
"Prayush",
""
],
[
"Khera",
"Neev",
""
],
[
"Deppe",
"Nils",
""
],
[
"Dhani",
"Arnab",
""
],
[
"Boyle",
"Michael",
""
],
[
"Giesler",
"Matthew",
""
],
[
"Kidder",
... | We construct the covariantly defined multipole moments on the common horizon of an equal-mass, non-spinning, quasicircular binary-black-hole system. We see a strong correlation between these multipole moments and the gravitational waveform. We find that the multipole moments are well described by the fundamental quasin... |
1611.00018 | Yi-Zen Chu | Yi-Zen Chu | More On Cosmological Gravitational Waves And Their Memories | 84 pages, 1 figure | null | 10.1088/1361-6382/aa8392 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend recent theoretical results on the propagation of linear
gravitational waves (GWs), including their associated memories, in spatially
flat Friedmann--Lema\^{i}tre--Robertson--Walker (FLRW) universes, for all
spacetime dimensions higher than 3. By specializing to a cosmology driven by a
perfect fluid with a c... | [
{
"created": "Mon, 31 Oct 2016 20:05:53 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Nov 2016 08:13:52 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Jan 2017 00:29:04 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Aug 2017 05:57:29 GMT",
"version": "v4"
}
] | 2017-09-27 | [
[
"Chu",
"Yi-Zen",
""
]
] | We extend recent theoretical results on the propagation of linear gravitational waves (GWs), including their associated memories, in spatially flat Friedmann--Lema\^{i}tre--Robertson--Walker (FLRW) universes, for all spacetime dimensions higher than 3. By specializing to a cosmology driven by a perfect fluid with a con... |
1905.10801 | Dr. Anirudh Pradhan | Gopi Kant Goswami, Anirudh Pradhan and Aroonkumar Beesham | A Dark Energy Quintessence Model of the Universe | 10 pages, 6 figures | Mod. Phys. Lett. A, Vol. 35, No. 04, 10 Feb (2020), 2050002 | 10.1142/S0217732320500029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we have presented a model of the FLRW universe filled with
matter and dark energy fluids, by assuming an ansatz that deceleration
parameter is a linear function of the Hubble constant. This results in a
time-dependent DP having decelerating-accelerating transition phase of the
universe. This is a quint... | [
{
"created": "Sun, 26 May 2019 13:14:08 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2019 11:21:54 GMT",
"version": "v2"
}
] | 2021-08-02 | [
[
"Goswami",
"Gopi Kant",
""
],
[
"Pradhan",
"Anirudh",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | In this paper, we have presented a model of the FLRW universe filled with matter and dark energy fluids, by assuming an ansatz that deceleration parameter is a linear function of the Hubble constant. This results in a time-dependent DP having decelerating-accelerating transition phase of the universe. This is a quintes... |
gr-qc/9605048 | Dave Nicholson | D. Nicholson, et al. (University of Wales, Cardiff, UK.) | Results of the First Coincident Observations by Two
Laser-Interferometric Gravitational Wave Detectors | 11 pages, 2 postscript figures | Phys.Lett.A218:175-180,1996 | 10.1016/0375-9601(96)00438-0 | null | gr-qc | null | We report an upper bound on the strain amplitude of gravitational wave bursts
in a waveband from around 800Hz to 1.25kHz. In an effective coincident
observing period of 62 hours, the prototype laser interferometric gravitational
wave detectors of the University of Glasgow and Max Planck Institute for
Quantum Optics, ... | [
{
"created": "Wed, 22 May 1996 10:59:56 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Nicholson",
"D.",
""
]
] | We report an upper bound on the strain amplitude of gravitational wave bursts in a waveband from around 800Hz to 1.25kHz. In an effective coincident observing period of 62 hours, the prototype laser interferometric gravitational wave detectors of the University of Glasgow and Max Planck Institute for Quantum Optics, ha... |
gr-qc/9912110 | Kiyoshi Shiraishi | Mitsuru Ooho and Kiyoshi Shiraishi (Yamaguchi University) | Multi-centered Solutions with a (very special) Warped Compactification | LaTeX, 4 pages, no figure, Presented at 9th Workshop on General
Relativity and Gravitation, Hiroshima, Japan, Nov 3-6, 1999. References added | null | null | null | gr-qc | null | We find an exact solution for multi-black strings in the brane world with
warped compactification.
| [
{
"created": "Tue, 28 Dec 1999 08:03:30 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jan 2000 11:23:14 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ooho",
"Mitsuru",
"",
"Yamaguchi University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | We find an exact solution for multi-black strings in the brane world with warped compactification. |
1202.5911 | K G Arun | K. G. Arun (Chennai Mathematical Instt) | Generic bounds on dipolar gravitational radiation from inspiralling
compact binaries | Matches with the published version | Class. Quant. Grav. 29, 075011 (2012) | 10.1088/0264-9381/29/7/075011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various alternative theories of gravity predict dipolar gravitational
radiation in addition to quadrupolar radiation. We show that gravitational wave
(GW) observations of inspiralling compact binaries can put interesting
constraints on the strengths of the dipole modes of GW polarizations. We put
forward a physically... | [
{
"created": "Mon, 27 Feb 2012 12:36:57 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Mar 2012 09:00:48 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Arun",
"K. G.",
"",
"Chennai Mathematical Instt"
]
] | Various alternative theories of gravity predict dipolar gravitational radiation in addition to quadrupolar radiation. We show that gravitational wave (GW) observations of inspiralling compact binaries can put interesting constraints on the strengths of the dipole modes of GW polarizations. We put forward a physically m... |
1510.08770 | Anzhong Wang | J. Gariel, N.O. Santos, and Anzhong Wang | Kerr Geodesics Following the Axis of Symmetry | revtex4, no figures and tables. Gen. Relativ. Grav. 48 (2016) 66 | Gen. Relativ. Grav. 48 (2016) 66 | 10.1007/s10714-016-2061-2 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present here the general expressions for the acceleration of massive test
particles along the symmetry axis of the Kerr metric, and then study the main
properties of this acceleration in different regions of the spacetime. In
particular, we show that there exists a region near the black hole in which the
gravitati... | [
{
"created": "Thu, 29 Oct 2015 16:35:55 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Apr 2016 16:06:02 GMT",
"version": "v2"
},
{
"created": "Fri, 6 May 2016 00:47:10 GMT",
"version": "v3"
}
] | 2016-05-09 | [
[
"Gariel",
"J.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"Anzhong",
""
]
] | We present here the general expressions for the acceleration of massive test particles along the symmetry axis of the Kerr metric, and then study the main properties of this acceleration in different regions of the spacetime. In particular, we show that there exists a region near the black hole in which the gravitation... |
1005.2507 | Edward Anderson | Edward Anderson | Scaled Triangleland Model of Quantum Cosmology | references added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In scaled relational particle mechanics, only relative times, relative angles
and relative separations are meaningful. It arose in the study of the absolute
versus relative motion debate. It has then turned out to be a useful toy model
of classical and quantum general relativity, such as for investigating
conceptual ... | [
{
"created": "Fri, 14 May 2010 12:26:17 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jun 2010 18:30:22 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Sep 2010 12:29:52 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Oct 2010 12:35:36 GMT",
"version": "v4"
}
] | 2015-03-17 | [
[
"Anderson",
"Edward",
""
]
] | In scaled relational particle mechanics, only relative times, relative angles and relative separations are meaningful. It arose in the study of the absolute versus relative motion debate. It has then turned out to be a useful toy model of classical and quantum general relativity, such as for investigating conceptual st... |
gr-qc/0107100 | Spiros Cotsakis | Spiros Cotsakis and John Miritzis | A note on wavemap-tensor cosmologies | 8 pages, LaTeX, to appear in the Proceedings of the 2nd Hellenic
Cosmology Workshop, National Observatory of Athens, April 21-22, 2001,
(Kluwer 2001) | null | 10.1007/978-94-010-0622-4_7 | null | gr-qc | null | We examine theories of gravity which include finitely many coupled scalar
fields with arbitrary couplings to the curvature (wavemaps). We show that the
most general scalar-tensor $\sigma$-model action is conformally equivalent to
general relativity with a minimally coupled wavemap with a particular target
metric. Inf... | [
{
"created": "Tue, 31 Jul 2001 07:29:32 GMT",
"version": "v1"
}
] | 2016-02-01 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Miritzis",
"John",
""
]
] | We examine theories of gravity which include finitely many coupled scalar fields with arbitrary couplings to the curvature (wavemaps). We show that the most general scalar-tensor $\sigma$-model action is conformally equivalent to general relativity with a minimally coupled wavemap with a particular target metric. Infla... |
1907.08525 | Vladim\'ir Balek | Matej S\'aren\'y, Vladim\'ir Balek | Effect of black hole--plasma system on light beams | 20 pages, 16 figures | Gen. Rel. Grav. 51:141 (2019) | 10.1007/s10714-019-2629-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the paper we discuss propagation of light around Kerr black hole
surrounded by non-magnetized cold plasma with infinite conductivity. For that
purpose, we use equations for propagation of light rays obtained within Synge's
approach in the approximation of geometrical optics. We derive equation of
deviation of a ra... | [
{
"created": "Fri, 19 Jul 2019 14:26:09 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Oct 2019 19:37:14 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Nov 2019 19:15:44 GMT",
"version": "v3"
}
] | 2019-11-13 | [
[
"Sárený",
"Matej",
""
],
[
"Balek",
"Vladimír",
""
]
] | In the paper we discuss propagation of light around Kerr black hole surrounded by non-magnetized cold plasma with infinite conductivity. For that purpose, we use equations for propagation of light rays obtained within Synge's approach in the approximation of geometrical optics. We derive equation of deviation of a ray ... |
1008.0520 | Jan Holland | Jan Holland | Non-existence of toroidal cohomogeneity-1 near horizon geometries | 8 pages | Annales Henri Poincare 15 (2014) 407-414 | 10.1007/s00023-013-0244-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that $D\geq 5$ dimensional stationary, non-static near horizon
geometries with (D-3) rotational symmetries subject to the vacuum Einstein
equations including a cosmological constant cannot have toroidal horizon
topology. In D=4 dimensions the same result is obtained under the assumption of
a non-negative cos... | [
{
"created": "Tue, 3 Aug 2010 11:10:43 GMT",
"version": "v1"
}
] | 2014-02-04 | [
[
"Holland",
"Jan",
""
]
] | We prove that $D\geq 5$ dimensional stationary, non-static near horizon geometries with (D-3) rotational symmetries subject to the vacuum Einstein equations including a cosmological constant cannot have toroidal horizon topology. In D=4 dimensions the same result is obtained under the assumption of a non-negative cosmo... |
2108.06378 | Robert J. Scherrer | S. David Storm and Robert J. Scherrer | Observational constraints on inflection point quintessence with a cubic
potential | 8 pages, 4 figures, added discussion of cyclic models | Phys. Lett. B, 829, 137126 (2022) | 10.1016/j.physletb.2022.137126 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the simplest inflection point quintessence model, with a potential
given by $V(\phi) = V_0 + V_3 \phi^3$. This model can produce either asymptotic
de Sitter expansion or transient acceleration, and we show that it does not
correspond to either pure freezing or thawing behavior. We derive observational
cons... | [
{
"created": "Fri, 13 Aug 2021 20:04:58 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Dec 2021 20:09:49 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Apr 2022 17:30:10 GMT",
"version": "v3"
}
] | 2022-08-08 | [
[
"Storm",
"S. David",
""
],
[
"Scherrer",
"Robert J.",
""
]
] | We examine the simplest inflection point quintessence model, with a potential given by $V(\phi) = V_0 + V_3 \phi^3$. This model can produce either asymptotic de Sitter expansion or transient acceleration, and we show that it does not correspond to either pure freezing or thawing behavior. We derive observational constr... |
gr-qc/9402025 | Jemal Guven | Riccardo Capovilla and Jemal Guven | Super-Minisuperspace and New Variables | 16 pages, CIEA-GR-9401 | Class.Quant.Grav.11:1961-1970,1994 | 10.1088/0264-9381/11/8/004 | null | gr-qc | null | We consider the specialization to spatially homogenous solutions of the
Jacobson formulation of N=1 canonical supergravity in terms of Ashtekar's new
variables.
We find that the classical Poisson algebra of the supersymmetry constraints
is preserved by this specialization only for Bianchi type A models. The
quant... | [
{
"created": "Fri, 11 Feb 1994 23:46:35 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Capovilla",
"Riccardo",
""
],
[
"Guven",
"Jemal",
""
]
] | We consider the specialization to spatially homogenous solutions of the Jacobson formulation of N=1 canonical supergravity in terms of Ashtekar's new variables. We find that the classical Poisson algebra of the supersymmetry constraints is preserved by this specialization only for Bianchi type A models. The quantizatio... |
gr-qc/9706059 | Farhad Ghaboussi | F. Ghaboussi | Foundation of The Two dimensional Quantum Theory of Gravity | 24 pages, Latex, a revised version | null | null | null | gr-qc | null | The two dimensional substructure of general relativity and gravity, and the
two dimensional geometry of quantum effect by black hole are disclosed. Then
the canonical quantization of the two dimensional theory of gravity is
performed. It is shown that the resulting uncertainty relations can explain
black hole quantum... | [
{
"created": "Thu, 19 Jun 1997 13:56:26 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Aug 1997 11:32:21 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Jul 1998 12:02:11 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Ghaboussi",
"F.",
""
]
] | The two dimensional substructure of general relativity and gravity, and the two dimensional geometry of quantum effect by black hole are disclosed. Then the canonical quantization of the two dimensional theory of gravity is performed. It is shown that the resulting uncertainty relations can explain black hole quantum e... |
gr-qc/0101087 | Ali Mostafazadeh | A. Mostafazadeh | Cosmological Adiabatic Geometric Phase of a Scalar Field in a Bianchi
Spacetime | Presented in the IX Regional Conference on Mathematical Physics Ref:
Turkish J. Phys. 24, 411-128 (2000) | Turk.J.Phys. 24 (2000) 411-428 | null | null | gr-qc | null | A two-component formulation of the Klein-Gordon equation is used to
investigate the cyclic and noncyclic adiabatic geometric phases due to
spatially homogeneous (Bianchi) cosmological models. It is shown that no
adiabatic geometric phases arise for Bianchi type I models. For general Bianchi
type IX models the problem... | [
{
"created": "Mon, 22 Jan 2001 12:15:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mostafazadeh",
"A.",
""
]
] | A two-component formulation of the Klein-Gordon equation is used to investigate the cyclic and noncyclic adiabatic geometric phases due to spatially homogeneous (Bianchi) cosmological models. It is shown that no adiabatic geometric phases arise for Bianchi type I models. For general Bianchi type IX models the problem o... |
2301.09147 | Yaqi Zhao | Y. Zhao, Yifu Cai, S. Das, G. Lambiase, E.N. Saridakis, E.C. Vagenas | Quasinormal Modes in Noncommutative Schwarzschild black holes | 15 pages, 7 figures | Nucl. Phys. B 1004 (2024) 116545 | 10.1016/j.nuclphysb.2024.116545 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quasinormal modes of a massless scalar field in a
Schwarzschild black hole, which is deformed due to noncommutative corrections.
We introduce the deformed Schwarzschild black hole solution, which depends on
the noncommutative parameter $\Theta$. We then extract the master equation as a
Schr\"odinge... | [
{
"created": "Sun, 22 Jan 2023 16:04:49 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2024 06:23:18 GMT",
"version": "v2"
}
] | 2024-05-20 | [
[
"Zhao",
"Y.",
""
],
[
"Cai",
"Yifu",
""
],
[
"Das",
"S.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Saridakis",
"E. N.",
""
],
[
"Vagenas",
"E. C.",
""
]
] | We investigate the quasinormal modes of a massless scalar field in a Schwarzschild black hole, which is deformed due to noncommutative corrections. We introduce the deformed Schwarzschild black hole solution, which depends on the noncommutative parameter $\Theta$. We then extract the master equation as a Schr\"odinger-... |
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