id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2107.06554 | Zheng-Wen Long | Yi Yang, Dong Liu, Zhaoyi Xu, Yujia Xing, Shurui Wu, Zheng-Wen Long | Echoes of novel black-bounce spacetimes | null | null | 10.1103/PhysRevD.104.104021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave echoes can be used as a significant observable to
understand the properties of black holes horizon. In addition, echoes would
also closely relate to the unique properties of compact objects. In this work
we study the evolution of electromagnetic field and scalar field under the
background of novel ... | [
{
"created": "Wed, 14 Jul 2021 08:39:20 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jul 2021 13:08:48 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Oct 2021 15:25:46 GMT",
"version": "v3"
}
] | 2021-11-10 | [
[
"Yang",
"Yi",
""
],
[
"Liu",
"Dong",
""
],
[
"Xu",
"Zhaoyi",
""
],
[
"Xing",
"Yujia",
""
],
[
"Wu",
"Shurui",
""
],
[
"Long",
"Zheng-Wen",
""
]
] | Gravitational wave echoes can be used as a significant observable to understand the properties of black holes horizon. In addition, echoes would also closely relate to the unique properties of compact objects. In this work we study the evolution of electromagnetic field and scalar field under the background of novel bl... |
2408.04925 | Sahil Saini | Esteban Mato, Javier Olmedo and Sahil Saini | Spherically symmetric loop quantum gravity: Schwarzschild spacetimes
with a cosmological constant | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We provide a quantization of the Schwarzschild spacetime in the presence of a
cosmological constant, based on midisuperspace methods developed in the
spherically symmetric sector of loop quantum gravity, using in particular the
'improved dynamics' scheme. We include both the deSitter and anti-deSitter
cases. We find ... | [
{
"created": "Fri, 9 Aug 2024 08:12:22 GMT",
"version": "v1"
}
] | 2024-08-12 | [
[
"Mato",
"Esteban",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Saini",
"Sahil",
""
]
] | We provide a quantization of the Schwarzschild spacetime in the presence of a cosmological constant, based on midisuperspace methods developed in the spherically symmetric sector of loop quantum gravity, using in particular the 'improved dynamics' scheme. We include both the deSitter and anti-deSitter cases. We find th... |
gr-qc/0206009 | Fabio Scardigli | Fabio Scardigli | Analysis of a Shell System in General Relativity | PhD Thesis, 59 pages, University of Bern, December 2001 | null | null | null | gr-qc | null | This Thesis concerns a thin fluid shell embedded in its own gravitational
field. The starting point is a work of Hajicek and Kijowski, where the
hamiltonian formalism for shell(s) (with no symmetry) in Einstein gravity is
developed. An open problem at the end of that paper is to show how the
hamiltonian formalism def... | [
{
"created": "Mon, 3 Jun 2002 19:34:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Scardigli",
"Fabio",
""
]
] | This Thesis concerns a thin fluid shell embedded in its own gravitational field. The starting point is a work of Hajicek and Kijowski, where the hamiltonian formalism for shell(s) (with no symmetry) in Einstein gravity is developed. An open problem at the end of that paper is to show how the hamiltonian formalism defin... |
1201.5715 | Carlos F. Sopuerta | Carlos F. Sopuerta and Nicolas Yunes | Approximate Waveforms for Extreme-Mass-Ratio Inspirals: The Chimera
Scheme | 10 pages, 3 figures. LaTeX, JPCS style. Submitted to the proceedings
of the 9th Edoardo Amaldi Conference on Gravitational Waves, and the 2011
Numerical Relativity - Data Analysis (NRDA) meeting, held 10-15 July 2011 in
Cardiff, Wales, UK, July 10-15 2011 | null | 10.1088/1742-6596/363/1/012021 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new kludge scheme to model the dynamics of generic
extreme-mass-ratio inspirals (EMRIs; stellar compact objects spiraling into a
spinning supermassive black hole) and their gravitational-wave emission. The
Chimera scheme is a hybrid method that combines tools from different
approximation techniques in G... | [
{
"created": "Fri, 27 Jan 2012 08:08:05 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Sopuerta",
"Carlos F.",
""
],
[
"Yunes",
"Nicolas",
""
]
] | We describe a new kludge scheme to model the dynamics of generic extreme-mass-ratio inspirals (EMRIs; stellar compact objects spiraling into a spinning supermassive black hole) and their gravitational-wave emission. The Chimera scheme is a hybrid method that combines tools from different approximation techniques in Gen... |
gr-qc/0106039 | Chris Doran | Chris Doran and Anthony Lasenby | Perturbation Theory Calculation of the Black Hole Elastic Scattering
Cross Section | 11 latex pages, no figures | Phys.Rev. D66 (2002) 024006 | 10.1103/PhysRevD.66.024006 | null | gr-qc astro-ph | null | The differential cross section for scattering of a Dirac particle in a black
hole background is found. The result is the gravitational analog of the Mott
formula for scattering in a Coulomb background. The equivalence principle is
neatly embodied in the cross section, which depends only on the incident
velocity, and ... | [
{
"created": "Mon, 11 Jun 2001 15:43:12 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Doran",
"Chris",
""
],
[
"Lasenby",
"Anthony",
""
]
] | The differential cross section for scattering of a Dirac particle in a black hole background is found. The result is the gravitational analog of the Mott formula for scattering in a Coulomb background. The equivalence principle is neatly embodied in the cross section, which depends only on the incident velocity, and no... |
1706.05530 | Hui-Ling Li | Hui-Ling Li, Zhong-Wen Feng | Holographic Van der Waals phase transition of the higher dimensional
electrically charged hairy black hole | 9 pages, 6 figures, 3 tables | Eur. Phys. J. C 78 (2018) 49 | 10.1140/epjc/s10052-018-5515-8 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | With motivation by holography, employing black hole entropy, two point
connection function and entanglement entropy, we show that, for the higher
dimensional Anti-de Sitter charged hairy black hole in the fixed charged
ensemble, a Van der Waals-like phase transition can be observed. Furthermore,
based on the Maxwell'... | [
{
"created": "Sat, 17 Jun 2017 13:01:54 GMT",
"version": "v1"
}
] | 2018-10-08 | [
[
"Li",
"Hui-Ling",
""
],
[
"Feng",
"Zhong-Wen",
""
]
] | With motivation by holography, employing black hole entropy, two point connection function and entanglement entropy, we show that, for the higher dimensional Anti-de Sitter charged hairy black hole in the fixed charged ensemble, a Van der Waals-like phase transition can be observed. Furthermore, based on the Maxwell's ... |
gr-qc/9310020 | Joe Parry | J. Parry D. S. Salopek and J. M. Stewart | Solving the Hamilton-Jacobi Equation for General Relativity | 13 pages, RevTeX, DAMTP-R93/22 | Phys.Rev.D49:2872-2881,1994 | 10.1103/PhysRevD.49.2872 | null | gr-qc | null | We demonstrate a systematic method for solving the Hamilton-Jacobi equation
for general relativity with the inclusion of matter fields. The generating
functional is expanded in a series of spatial gradients. Each term is
manifestly invariant under reparameterizations of the spatial coordinates
(``gauge-invariant''). ... | [
{
"created": "Tue, 12 Oct 1993 16:43:12 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Salopek",
"J. Parry D. S.",
""
],
[
"Stewart",
"J. M.",
""
]
] | We demonstrate a systematic method for solving the Hamilton-Jacobi equation for general relativity with the inclusion of matter fields. The generating functional is expanded in a series of spatial gradients. Each term is manifestly invariant under reparameterizations of the spatial coordinates (``gauge-invariant''). At... |
2403.10741 | Daniele Oriti | Daniele Oriti | Hydrodynamics on (mini)superspace, or a non-linear extension of quantum
cosmology | 31 pages; invited contribution to the collective volume "Time and
timelessness in fundamental physics and cosmology" (eds S. De Bianchi, M.
Forgione, L. Marongiu), to be published by Springer | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We outline the content and theoretical support for the proposal of
"hydrodynamics on (mini)superspace" (or a non-linear extension of quantum
cosmology) as an effective framework for quantum gravity in a cosmological
context. The basis for the proposal is a general correspondence between
hydrodynamics and cosmology, a... | [
{
"created": "Sat, 16 Mar 2024 00:03:26 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Oriti",
"Daniele",
""
]
] | We outline the content and theoretical support for the proposal of "hydrodynamics on (mini)superspace" (or a non-linear extension of quantum cosmology) as an effective framework for quantum gravity in a cosmological context. The basis for the proposal is a general correspondence between hydrodynamics and cosmology, and... |
1602.04233 | Izzet Sakalli | I. Sakalli and O. A. Aslan | Absorption Cross-section and Decay Rate of Rotating Linear Dilaton Black
Holes | 18 pages and 2 figures | Astroparticle Physics 74, 73 (2016) | 10.1016/j.astropartphys.2015.10.005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically study the scalar perturbation of non-asymptotically flat
(NAF) rotating linear dilaton black holes (RLDBHs) in 4-dimensions. We show
that both radial and angular wave equations can be solved in terms of the
hypergeometric functions. The exact greybody factor (GF), the absorption
cross-section (ACS), a... | [
{
"created": "Fri, 12 Feb 2016 21:48:43 GMT",
"version": "v1"
}
] | 2016-02-16 | [
[
"Sakalli",
"I.",
""
],
[
"Aslan",
"O. A.",
""
]
] | We analytically study the scalar perturbation of non-asymptotically flat (NAF) rotating linear dilaton black holes (RLDBHs) in 4-dimensions. We show that both radial and angular wave equations can be solved in terms of the hypergeometric functions. The exact greybody factor (GF), the absorption cross-section (ACS), and... |
1710.10052 | Paul Tod | Paul Tod | The St\"utzfunktion and the Cut Function | 10 pages. This is a corrected, revised and updated version of a paper
which originally appeared in Recent Advances in General Relativity, eds. A I
Janis and J R Porter, Einstein Studies vol. 4, Birkha\"user 1992 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review some standard theory of convex bodies in $\mathbb{R}^3$ and rephrase
it in a formalism of Ted Newman to show the relation between the
St\"utzfunktion of the former theory and the cut function introduced by Ted.
This leads to a conjectured inequality for space-like two-spheres in Minkowski
space that generali... | [
{
"created": "Fri, 27 Oct 2017 09:53:18 GMT",
"version": "v1"
}
] | 2017-10-30 | [
[
"Tod",
"Paul",
""
]
] | I review some standard theory of convex bodies in $\mathbb{R}^3$ and rephrase it in a formalism of Ted Newman to show the relation between the St\"utzfunktion of the former theory and the cut function introduced by Ted. This leads to a conjectured inequality for space-like two-spheres in Minkowski space that generalise... |
0807.1178 | Jeandrew Brink | Jeandrew Brink | Spacetime Encodings I- A Spacetime Reconstruction Problem | 5 pages, 2 figures | Phys.Rev.D78:102001,2008 | 10.1103/PhysRevD.78.102001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores features of an idealized mathematical machine (algorithm)
that would be capable of reconstructing the gravitational nature (the
multipolar structure or spacetime metric) of a compact object, by observing
gravitational radiation emitted by a small object that orbits and spirals into
it. An outline ... | [
{
"created": "Tue, 8 Jul 2008 06:43:15 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brink",
"Jeandrew",
""
]
] | This paper explores features of an idealized mathematical machine (algorithm) that would be capable of reconstructing the gravitational nature (the multipolar structure or spacetime metric) of a compact object, by observing gravitational radiation emitted by a small object that orbits and spirals into it. An outline is... |
1708.02878 | Paul Klinger | Piotr T. Chru\'sciel, Erwann Delay, Paul Klinger, Andreas Kriegl,
Peter W. Michor, Armin Rainer | Non-singular spacetimes with a negative cosmological constant: V. Boson
stars | 21 pages, v2: journal accepted version | Letters in Mathematical Physics 108, 9 (September 2018), 2009-2030 | 10.1007/s11005-018-1062-3 | UWThPh-2017-23 | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove existence of large families of solutions of Einstein-complex scalar
field equations with a negative cosmological constant, with a stationary or
static metric and a time-periodic complex scalar field.
| [
{
"created": "Wed, 9 Aug 2017 15:28:14 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Feb 2018 11:49:58 GMT",
"version": "v2"
}
] | 2019-02-06 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Delay",
"Erwann",
""
],
[
"Klinger",
"Paul",
""
],
[
"Kriegl",
"Andreas",
""
],
[
"Michor",
"Peter W.",
""
],
[
"Rainer",
"Armin",
""
]
] | We prove existence of large families of solutions of Einstein-complex scalar field equations with a negative cosmological constant, with a stationary or static metric and a time-periodic complex scalar field. |
2311.06653 | Eduar Antonio Becerra Vergara | F. D. Lora-Clavijo, G. D. Prada-M\'endez, L. M. Becerra, E. A.
Becerra-Vergara | The $\textit{q}$-metric naked singularity: A viable explanation for the
nature of the central object in the Milky Way | Accepted for publication in Classical and Quantum Gravity | null | 10.1088/1361-6382/ad0b9e | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate whether the compact object at the center of the
Milky Way is a naked singularity described by the $\textit{q}$-metric
spacetime. Our fitting of the astrometric and spectroscopic data for the S2
star implies that similarly to the Schwarzschild black hole, the
$\textit{q}$-metric naked sing... | [
{
"created": "Sat, 11 Nov 2023 19:47:04 GMT",
"version": "v1"
}
] | 2023-11-14 | [
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Prada-Méndez",
"G. D.",
""
],
[
"Becerra",
"L. M.",
""
],
[
"Becerra-Vergara",
"E. A.",
""
]
] | In this work, we investigate whether the compact object at the center of the Milky Way is a naked singularity described by the $\textit{q}$-metric spacetime. Our fitting of the astrometric and spectroscopic data for the S2 star implies that similarly to the Schwarzschild black hole, the $\textit{q}$-metric naked singul... |
2007.06766 | Rodrigo Lipparelli Fernandez | Rodrigo L. Fernandez, Ribamar R. R. Reis and Sergio E. Jor\'as | Massive scalar wave packet emission by a charged Black Hole and Cosmic
Censorship Conjecture violation | 9 pages, 8 figures | Phys. Rev. D 102, 024049 (2020) | 10.1103/PhysRevD.102.024049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the tunneling probability of a massive ($m_w$) uncharged scalar
packet out from a near-extremal, static charged black hole (with mass $M$ and
charge $Q\lesssim M$). We show that there is indeed a net probability that a
massive uncharged particle tunnels out from the black hole so that the final
state (with n... | [
{
"created": "Tue, 14 Jul 2020 01:56:56 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jul 2020 19:02:22 GMT",
"version": "v2"
}
] | 2020-07-21 | [
[
"Fernandez",
"Rodrigo L.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Jorás",
"Sergio E.",
""
]
] | We study the tunneling probability of a massive ($m_w$) uncharged scalar packet out from a near-extremal, static charged black hole (with mass $M$ and charge $Q\lesssim M$). We show that there is indeed a net probability that a massive uncharged particle tunnels out from the black hole so that the final state (with new... |
gr-qc/9807035 | Burkhard Kleihaus | B. Kleihaus (1), J. Kunz (2), A. Sood (2) and M. Wirschins (2) ((1)
NUI Maynooth, Ireland, (2) University Oldenburg, Germany) | Black Holes with Yang-Mills Hair | LaTeX using epsf, aipproc, 10 pages including 9 ps figures, Talk held
by Jutta Kunz at the Conference on Particles, Fields and Gravitation in Lodz,
Poland, April 1998 | null | 10.1063/1.57143 | null | gr-qc hep-th | null | In Einstein-Maxwell theory black holes are uniquely determined by their mass,
their charge and their angular momentum. This is no longer true in
Einstein-Yang-Mills theory. We discuss sequences of neutral and charged SU(N)
Einstein-Yang-Mills black holes, which are static spherically symmetric and
asymptotically flat... | [
{
"created": "Wed, 15 Jul 1998 12:06:17 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kleihaus",
"B.",
""
],
[
"Kunz",
"J.",
""
],
[
"Sood",
"A.",
""
],
[
"Wirschins",
"M.",
""
]
] | In Einstein-Maxwell theory black holes are uniquely determined by their mass, their charge and their angular momentum. This is no longer true in Einstein-Yang-Mills theory. We discuss sequences of neutral and charged SU(N) Einstein-Yang-Mills black holes, which are static spherically symmetric and asymptotically flat, ... |
1407.6047 | Gergely Sz\'ekely | J. X. Madar\'asz, G. Sz\'ekely and M. Stannett | On the Possibility and Consequences of Negative Mass | 8 pages, 5 figures | null | null | null | gr-qc math-ph math.LO math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility and consequences of the existence of particles
having negative relativistic masses, and show that their existence implies the
existence of faster- than-light particles (tachyons). Our proof requires only
two postulates concerning such particles: that it is possible for particles of
any ... | [
{
"created": "Tue, 22 Jul 2014 21:27:48 GMT",
"version": "v1"
}
] | 2014-07-24 | [
[
"Madarász",
"J. X.",
""
],
[
"Székely",
"G.",
""
],
[
"Stannett",
"M.",
""
]
] | We investigate the possibility and consequences of the existence of particles having negative relativistic masses, and show that their existence implies the existence of faster- than-light particles (tachyons). Our proof requires only two postulates concerning such particles: that it is possible for particles of any (p... |
gr-qc/0601119 | Ingemar Bengtsson | J. E. Aman, Ingemar Bengtsson and Narit Pidokrajt | Flat Information Geometries in Black Hole Thermodynamics | 14 pages, one figure. Dedicated to Rafael Sorkin's birthday | Gen.Rel.Grav.38:1305-1315,2006 | 10.1007/s10714-006-0306-1 | null | gr-qc | null | The Hessian of either the entropy or the energy function can be regarded as a
metric on a Gibbs surface. For two parameter families of asymptotically flat
black holes in arbitrary dimension one or the other of these metrics are flat,
and the state space is a flat wedge. The mathematical reason for this is traced
back... | [
{
"created": "Fri, 27 Jan 2006 12:59:53 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Aman",
"J. E.",
""
],
[
"Bengtsson",
"Ingemar",
""
],
[
"Pidokrajt",
"Narit",
""
]
] | The Hessian of either the entropy or the energy function can be regarded as a metric on a Gibbs surface. For two parameter families of asymptotically flat black holes in arbitrary dimension one or the other of these metrics are flat, and the state space is a flat wedge. The mathematical reason for this is traced back t... |
gr-qc/0306029 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Angelo Tartaglia | Einstein-Cartan theory as a theory of defects in space-time | 18 pages, 7 EPS figures, RevTeX4, to appear in the American Journal
of Physics, revised version with typos corrected | Am.J.Phys.71:1303-1313,2003 | 10.1119/1.1596176 | null | gr-qc | null | The Einstein-Cartan theory of gravitation and the classical theory of defects
in an elastic medium are presented and compared. The former is an extension of
general relativity and refers to four-dimensional space-time, while we
introduce the latter as a description of the equilibrium state of a
three-dimensional cont... | [
{
"created": "Sat, 7 Jun 2003 09:45:53 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Jul 2003 12:02:34 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Tartaglia",
"Angelo",
""
]
] | The Einstein-Cartan theory of gravitation and the classical theory of defects in an elastic medium are presented and compared. The former is an extension of general relativity and refers to four-dimensional space-time, while we introduce the latter as a description of the equilibrium state of a three-dimensional contin... |
0901.1569 | Jose Luis Jaramillo | Jos\'e Luis Jaramillo | Isolated Horizon structures in quasiequilibrium black hole initial data | 4 pages, no figures. Shortened presentation matching the published
version | Phys.Rev.D79:087506,2009 | 10.1103/PhysRevD.79.087506 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Isolated horizon conditions enforce the time invariance of both the intrinsic
and the extrinsic geometry of a (quasilocal) black hole horizon. Nonexpanding
horizons, only requiring the invariance of the intrinsic geometry, have been
successfully employed in the (excision) initial data of black holes in
instantaneous ... | [
{
"created": "Mon, 12 Jan 2009 13:08:13 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Apr 2009 09:59:14 GMT",
"version": "v2"
}
] | 2009-10-29 | [
[
"Jaramillo",
"José Luis",
""
]
] | Isolated horizon conditions enforce the time invariance of both the intrinsic and the extrinsic geometry of a (quasilocal) black hole horizon. Nonexpanding horizons, only requiring the invariance of the intrinsic geometry, have been successfully employed in the (excision) initial data of black holes in instantaneous eq... |
gr-qc/0601069 | Joseph Henson | Joe Henson | Constructing an interval of Minkowski space from a causal set | latex; 8 pages, one figure; accepted for publication in Classical and
Quantum Gravity Letters | Class.Quant.Grav.23:L29-L35,2006 | 10.1088/0264-9381/23/4/L02 | null | gr-qc | null | A criticism sometimes made of the causal set quantum gravity program is that
there is no practical scheme for identifying manifoldlike causal sets and
finding embeddings of them into manifolds. A computational method for
constructing an approximate embedding of a small manifoldlike causal set into
Minkowski space (or... | [
{
"created": "Tue, 17 Jan 2006 15:34:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Henson",
"Joe",
""
]
] | A criticism sometimes made of the causal set quantum gravity program is that there is no practical scheme for identifying manifoldlike causal sets and finding embeddings of them into manifolds. A computational method for constructing an approximate embedding of a small manifoldlike causal set into Minkowski space (or a... |
1304.6542 | Natsuki Watanabe | Natsuki Watanabe | Domain wall in $f(R)$ gravity | 11 pages, no figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational impact inside and outside of a domain wall is studied in
the context of $f(R)$ gravity theory. The function $f(R)$ is found which
satisfies the stability conditions. Our results imply that the domain wall may
cause topological inflation.
| [
{
"created": "Wed, 24 Apr 2013 10:37:21 GMT",
"version": "v1"
}
] | 2013-04-25 | [
[
"Watanabe",
"Natsuki",
""
]
] | The gravitational impact inside and outside of a domain wall is studied in the context of $f(R)$ gravity theory. The function $f(R)$ is found which satisfies the stability conditions. Our results imply that the domain wall may cause topological inflation. |
1410.6710 | Prabir Rudra | Prabir Rudra (Asutosh College) | Coincidence Problem in f(T) Gravity Models | 14 pages, 15 figures (Revised form, Accepted for publication in
Astrophys. and Space Sci.) | null | 10.1007/s10509-015-2365-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this assignment we try to probe the role played by torsion in the current
scenario of coincidence and devise a set-up for its realization. In order to
model the scenario, the energy arising from the torsion component is considered
analogous to dark energy. An interaction between dark energy and dark matter is
cons... | [
{
"created": "Thu, 23 Oct 2014 07:06:24 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2015 11:14:13 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Rudra",
"Prabir",
"",
"Asutosh College"
]
] | In this assignment we try to probe the role played by torsion in the current scenario of coincidence and devise a set-up for its realization. In order to model the scenario, the energy arising from the torsion component is considered analogous to dark energy. An interaction between dark energy and dark matter is consid... |
gr-qc/9810047 | G. R. Filewood | G. R. Filewood | Microtorsion | 18 pages | null | null | null | gr-qc | null | The problem of unification of electro-magnetism and gravitation in four
dimensions; some new ideas involving torsion. A metric consisting of a
combination of symmetric and anti-symmetric parts is postulated and, in the
framework of general covariance, used to derive the free-field electro-magnetic
stress-energy tenso... | [
{
"created": "Wed, 14 Oct 1998 08:38:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Filewood",
"G. R.",
""
]
] | The problem of unification of electro-magnetism and gravitation in four dimensions; some new ideas involving torsion. A metric consisting of a combination of symmetric and anti-symmetric parts is postulated and, in the framework of general covariance, used to derive the free-field electro-magnetic stress-energy tensor ... |
1503.02916 | Iver Brevik | Iver Brevik and Alexander Timoshkin | Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology | 13 pages, no figures. Mini-review, to appear in the MDPI journal
Universe | Universe 2015, 1, 24-37 | 10.3390/universe1010024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this short review is to describe cosmological models with a
linear inhomogeneous time-dependent equation of state (EoS) for the dark
energy, when the dark fluid is coupled with dark matter. This may lead to a
bounce cosmology. We consider equivalent descriptions in terms of the EoS
parameters for an ex... | [
{
"created": "Tue, 10 Mar 2015 14:10:23 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Brevik",
"Iver",
""
],
[
"Timoshkin",
"Alexander",
""
]
] | The purpose of this short review is to describe cosmological models with a linear inhomogeneous time-dependent equation of state (EoS) for the dark energy, when the dark fluid is coupled with dark matter. This may lead to a bounce cosmology. We consider equivalent descriptions in terms of the EoS parameters for an expo... |
1904.00963 | Aron Kovacs | \'Aron D. Kov\'acs | Well-posedness of cubic Horndeski theories | null | Phys. Rev. D 100, 024005 (2019) | 10.1103/PhysRevD.100.024005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the local well-posedness of the initial value problem for cubic
Horndeski theories. Three different strongly hyperbolic modifications of the
ADM formulation of the Einstein equations are extended to cubic Horndeski
theories in the weak field regime. In the first one, the equations of motion
are rewritten as ... | [
{
"created": "Mon, 1 Apr 2019 16:54:50 GMT",
"version": "v1"
}
] | 2019-07-17 | [
[
"Kovács",
"Áron D.",
""
]
] | We study the local well-posedness of the initial value problem for cubic Horndeski theories. Three different strongly hyperbolic modifications of the ADM formulation of the Einstein equations are extended to cubic Horndeski theories in the weak field regime. In the first one, the equations of motion are rewritten as a ... |
2110.09608 | Sashwat Tanay Mr | Gihyuk Cho, Sashwat Tanay, Achamveedu Gopakumar and Hyung Mok Lee | Generalized quasi-Keplerian solution for eccentric, non-spinning compact
binaries at 4PN order and the associated IMR waveform | 38 pages, 4 figures | Phys. Rev. D 105, 064010 (2022) | 10.1103/PhysRevD.105.064010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive fourth post-Newtonian (4PN) contributions to the Keplerian-type
parametric solution associated with the conservative dynamics of eccentric,
non-spinning compact binaries. The solution has been computed while ignoring
certain zero-average, oscillatory terms arising due to 4PN tail effects. We
provide explici... | [
{
"created": "Mon, 18 Oct 2021 20:11:20 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2022 23:06:54 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Apr 2022 19:08:03 GMT",
"version": "v3"
}
] | 2022-04-19 | [
[
"Cho",
"Gihyuk",
""
],
[
"Tanay",
"Sashwat",
""
],
[
"Gopakumar",
"Achamveedu",
""
],
[
"Lee",
"Hyung Mok",
""
]
] | We derive fourth post-Newtonian (4PN) contributions to the Keplerian-type parametric solution associated with the conservative dynamics of eccentric, non-spinning compact binaries. The solution has been computed while ignoring certain zero-average, oscillatory terms arising due to 4PN tail effects. We provide explicit ... |
gr-qc/9907019 | William A. Hiscock | Chad Clark, William A. Hiscock, and Shane L. Larson | Null geodesics in the Alcubierre warp drive spacetime: the view from the
bridge | 14 pages + 3 figures, REVTeX | Class.Quant.Grav. 16 (1999) 3965-3972 | 10.1088/0264-9381/16/12/313 | MSUPHY99.02 | gr-qc | null | The null geodesic equations in the Alcubierre warp drive spacetime are
numerically integrated to determine the angular deflection and redshift of
photons which propagate through the distortion of the ``warp drive'' bubble to
reach an observer at the origin of the warp effect. We find that for a starship
with an effec... | [
{
"created": "Tue, 6 Jul 1999 18:53:33 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Clark",
"Chad",
""
],
[
"Hiscock",
"William A.",
""
],
[
"Larson",
"Shane L.",
""
]
] | The null geodesic equations in the Alcubierre warp drive spacetime are numerically integrated to determine the angular deflection and redshift of photons which propagate through the distortion of the ``warp drive'' bubble to reach an observer at the origin of the warp effect. We find that for a starship with an effecti... |
gr-qc/9808065 | Dharam V. Ahluwalia | D. V. Ahluwalia (EFUAZ, Zacatecas) | On an incompleteness in the general-relativistic description of
gravitation | Based on a paper of the author published in Mod. Phys. Lett. A Vol.
13, #17 (1998) 1397-1400. Invited talk presented at the symposium to honor
Professor Mendel Sachs. To appear in the proceedings. For a popular version
see, Charles Seife, New Scientist 13 June 1998, p. 11 | null | null | EFUAZ FT-98-64 | gr-qc astro-ph hep-ph quant-ph | null | The recently introduced mechanism of flavor-oscillation clocks has been used
to emphasize observability of constant gravitational potentials and thereby to
question completeness of the theory of general relativity. An inequality has
been derived to experimentally test the thesis presented.
| [
{
"created": "Tue, 25 Aug 1998 17:22:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ahluwalia",
"D. V.",
"",
"EFUAZ, Zacatecas"
]
] | The recently introduced mechanism of flavor-oscillation clocks has been used to emphasize observability of constant gravitational potentials and thereby to question completeness of the theory of general relativity. An inequality has been derived to experimentally test the thesis presented. |
gr-qc/0304089 | Roy Maartens | Roy Maartens (Portsmouth) | Brane-world cosmological perturbations: a covariant approach | Based on a talk at the Brane-world Gravity Workshop, Yukawa
Institute, Jan 2002. 17 pages, 4 figures | Prog.Theor.Phys.Suppl.148:213-234,2003 | 10.1143/PTPS.148.213 | null | gr-qc astro-ph hep-th | null | The standard cosmological model, based on general relativity with an
inflationary era, is very effective in accounting for a broad range of observed
features of the universe. However, the ongoing puzzles about the nature of dark
matter and dark energy, together with the problem of a fundamental theoretical
framework ... | [
{
"created": "Wed, 23 Apr 2003 14:33:41 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Maartens",
"Roy",
"",
"Portsmouth"
]
] | The standard cosmological model, based on general relativity with an inflationary era, is very effective in accounting for a broad range of observed features of the universe. However, the ongoing puzzles about the nature of dark matter and dark energy, together with the problem of a fundamental theoretical framework fo... |
1903.05695 | Beatriz Elizaga Navascu\'es | Beatriz Elizaga Navascu\'es, Guillermo A. Mena Marug\'an and Thomas
Thiemann | Hamiltonian diagonalization in hybrid quantum cosmology | 22 pages, matches published version | Class. Quantum Grav. 36, 185010 (2019) | 10.1088/1361-6382/ab32af | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the possibility of selecting a natural vacuum state for scalar and
tensor gauge-invariant cosmological perturbations in the context of hybrid
quantum cosmology, by identifying those variables for the description of the
perturbations that display a dynamical behavior adapted to the evolution of the
entire c... | [
{
"created": "Wed, 13 Mar 2019 19:38:14 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Sep 2019 07:44:44 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Thiemann",
"Thomas",
""
]
] | We explore the possibility of selecting a natural vacuum state for scalar and tensor gauge-invariant cosmological perturbations in the context of hybrid quantum cosmology, by identifying those variables for the description of the perturbations that display a dynamical behavior adapted to the evolution of the entire cos... |
2203.09917 | Abhishek Chowdhuri | Abhishek Chowdhuri, Arpan Bhattacharyya | Study of eccentric binaries in Horndeski theory | 35 Pages, 1 figures, section 8 updated and more discussions regarding
the rate of energy and angular-momentum flux added, several consistency
checks of our results are added, a figure showing the variation of the
semi-major axis of the orbit of the binary as a function of eccentricity
added, discussion updated,... | Phys.Rev.D 106 (2022) 6, 064046 | 10.1103/PhysRevD.106.064046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the orbital evolution of eccentric binary systems in Horndeski
gravity. This particular theory provides a testbed to give insightful
comparisons with data. We compute the rate of energy loss and the rate of
change of angular momentum for the binaries by calculating the multipole
moments of the radiation fiel... | [
{
"created": "Fri, 18 Mar 2022 12:53:16 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2022 16:49:21 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Sep 2022 08:10:40 GMT",
"version": "v3"
}
] | 2022-09-28 | [
[
"Chowdhuri",
"Abhishek",
""
],
[
"Bhattacharyya",
"Arpan",
""
]
] | We study the orbital evolution of eccentric binary systems in Horndeski gravity. This particular theory provides a testbed to give insightful comparisons with data. We compute the rate of energy loss and the rate of change of angular momentum for the binaries by calculating the multipole moments of the radiation fields... |
0902.1859 | Andreas Kleinw\"achter | Robert Filter and Andreas Kleinw\"achter | On the multipole moments of a rigidly rotating fluid body | 5 pages, 4 figures, to appear in Annalen der Physik | Annalen Phys.18:102-106,2009 | 10.1002/andp.200910337 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on numerical simulations and analytical calculations we formulate a new
conjecture concerning the multipole moments of a rigidly rotating fluid body in
equilibrium. The conjecture implies that the exterior region of such a fluid is
not described by the Kerr metric.
| [
{
"created": "Wed, 11 Feb 2009 12:10:53 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Filter",
"Robert",
""
],
[
"Kleinwächter",
"Andreas",
""
]
] | Based on numerical simulations and analytical calculations we formulate a new conjecture concerning the multipole moments of a rigidly rotating fluid body in equilibrium. The conjecture implies that the exterior region of such a fluid is not described by the Kerr metric. |
0805.2926 | Bahram Mashhoon | Bahram Mashhoon | Nonlocal Special Relativity | 35 pages, invited paper to appear in the Minkowski issue of Annalen
der Physik | Annalen Phys.17:705-727, 2008 | 10.1002/andp.200810308 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the special theory of relativity, Lorentz invariance is extended in
Minkowski spacetime from ideal inertial observers to actual observers by means
of the hypothesis of locality, which postulates that accelerated observers are
always pointwise inertial. A critical examination of the locality assumption
reveals its ... | [
{
"created": "Mon, 19 May 2008 19:00:21 GMT",
"version": "v1"
}
] | 2009-11-18 | [
[
"Mashhoon",
"Bahram",
""
]
] | In the special theory of relativity, Lorentz invariance is extended in Minkowski spacetime from ideal inertial observers to actual observers by means of the hypothesis of locality, which postulates that accelerated observers are always pointwise inertial. A critical examination of the locality assumption reveals its do... |
2307.06674 | Krishnakanta Bhattacharya | Krishnakanta Bhattacharya and Kazuharu Bamba | Boundary terms and Brown-York quasi-local parameters for scalar-tensor
theory: a study on both timelike and null hypersurfaces | 36 Pages, Version accepted for publication in Physical Review D | Phys. Rev. D 109 (2024), 064026 | 10.1103/PhysRevD.109.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Boundary term and Brown-York (BY) formalism, which is based on the
Hamilton-Jacobi principle, are complimentary of each other as the gravitational
actions are not, usually, well-posed. In scalar-tensor theory, which is an
important alternative to GR, it has been shown that this complementarity
becomes even more cruci... | [
{
"created": "Thu, 13 Jul 2023 10:49:31 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2024 23:07:27 GMT",
"version": "v2"
}
] | 2024-03-12 | [
[
"Bhattacharya",
"Krishnakanta",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | Boundary term and Brown-York (BY) formalism, which is based on the Hamilton-Jacobi principle, are complimentary of each other as the gravitational actions are not, usually, well-posed. In scalar-tensor theory, which is an important alternative to GR, it has been shown that this complementarity becomes even more crucial... |
0906.2042 | Seiju Ohashi | Seiju Ohashi, Tetsuya Shiromizu, Sumio Yamada | The Riemannian Penrose inequality and a virtual gravitational collapse | 4pages, minor changes, accepted for publication in Physical Review D | Phys.Rev.D80:047501,2009 | 10.1103/PhysRevD.80.047501 | null | gr-qc astro-ph.CO hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reinterpret the proof of the Riemannian Penrose inequality by H. Bray. The
modified argument turns out to have a nice feature so that the flow of
Riemannian metrics appearing Bray's proof gives a Lorentzian metric of a
spacetime. We also discuss a possible extension of our approach to charged
black holes.
| [
{
"created": "Thu, 11 Jun 2009 04:54:47 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2009 04:39:42 GMT",
"version": "v2"
}
] | 2010-02-25 | [
[
"Ohashi",
"Seiju",
""
],
[
"Shiromizu",
"Tetsuya",
""
],
[
"Yamada",
"Sumio",
""
]
] | We reinterpret the proof of the Riemannian Penrose inequality by H. Bray. The modified argument turns out to have a nice feature so that the flow of Riemannian metrics appearing Bray's proof gives a Lorentzian metric of a spacetime. We also discuss a possible extension of our approach to charged black holes. |
2008.09774 | Jie Jiang | Xin-Yang Wang and Jie Jiang | Investigating the Linearized Second Law in Horndeski Gravity | 6 pages | Phys. Rev. D 102, 084020 (2020) | 10.1103/PhysRevD.102.084020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the entropy of stationary black holes in Horndeski gravity will be
modified by the non-minimally coupling scalar field, a significant issue of
whether the Wald entropy still obeys the linearized second law of black hole
thermodynamics can be proposed. To investigate this issue, a physical process
that the black... | [
{
"created": "Sat, 22 Aug 2020 07:59:17 GMT",
"version": "v1"
}
] | 2020-10-12 | [
[
"Wang",
"Xin-Yang",
""
],
[
"Jiang",
"Jie",
""
]
] | Since the entropy of stationary black holes in Horndeski gravity will be modified by the non-minimally coupling scalar field, a significant issue of whether the Wald entropy still obeys the linearized second law of black hole thermodynamics can be proposed. To investigate this issue, a physical process that the black h... |
0901.1955 | Ahmed Youssef | Jean-Pierre Gazeau (APC), Ahmed Youssef (APC) | A discrete nonetheless remarkable brick in de Sitter: the "massless
minimally coupled field" | Proceedings of the XXVII Colloquium on Group Theoretical Methods in
Physics, Yerevan, August 2008 | Phys.Atom.Nucl.73:222-229,2010 | 10.1134/S1063778810020031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Over the last ten years interest in the physics of de Sitter spacetime has
been growing very fast. Besides the supposed existence of a "de sitterian
period" in inflation theories, the observational evidence of an acceleration of
the universe expansion (interpreted as a positive cosmological constant or a
"dark energy... | [
{
"created": "Wed, 14 Jan 2009 09:05:27 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Gazeau",
"Jean-Pierre",
"",
"APC"
],
[
"Youssef",
"Ahmed",
"",
"APC"
]
] | Over the last ten years interest in the physics of de Sitter spacetime has been growing very fast. Besides the supposed existence of a "de sitterian period" in inflation theories, the observational evidence of an acceleration of the universe expansion (interpreted as a positive cosmological constant or a "dark energy" ... |
gr-qc/9703081 | Soumya Mohanty | Soumya D. Mohanty (IUCAA, Pune, India) | Hierarchical search strategy for the detection of gravitational waves
from coalescing binaries: Extension to post-Newtonian wave forms | 30 page RevTeX file and 17 figures (postscript). Submitted to PRD Feb
21, 1997 | Phys.Rev.D57:630-658,1998 | 10.1103/PhysRevD.57.630 | IUCAA preprint # 15/97 | gr-qc | null | The detection of gravitational waves from coalescing compact binaries would
be a computationally intensive process if a single bank of template wave forms
(i.e., a one step search) is used. In an earlier paper we had presented a
detection strategy, called a two step search}, that utilizes a hierarchy of
template bank... | [
{
"created": "Thu, 27 Mar 1997 11:11:39 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Mohanty",
"Soumya D.",
"",
"IUCAA, Pune, India"
]
] | The detection of gravitational waves from coalescing compact binaries would be a computationally intensive process if a single bank of template wave forms (i.e., a one step search) is used. In an earlier paper we had presented a detection strategy, called a two step search}, that utilizes a hierarchy of template banks.... |
1508.03820 | Arick Shao | Gustav Holzegel, Arick Shao | Unique continuation from infinity in asymptotically Anti-de Sitter
spacetimes | 50 pages, minor edits from referee comments | null | 10.1007/s00220-016-2576-0 | null | gr-qc hep-th math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the unique continuation properties of asymptotically Anti-de
Sitter spacetimes by studying Klein-Gordon-type equations $\Box_g \phi + \sigma
\phi = \mathcal{G} ( \phi, \partial \phi )$, $\sigma \in \mathbb{R}$, on a
large class of such spacetimes. Our main result establishes that if $\phi$
vanishes to suf... | [
{
"created": "Sun, 16 Aug 2015 12:33:55 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Aug 2016 14:29:07 GMT",
"version": "v2"
}
] | 2016-09-14 | [
[
"Holzegel",
"Gustav",
""
],
[
"Shao",
"Arick",
""
]
] | We consider the unique continuation properties of asymptotically Anti-de Sitter spacetimes by studying Klein-Gordon-type equations $\Box_g \phi + \sigma \phi = \mathcal{G} ( \phi, \partial \phi )$, $\sigma \in \mathbb{R}$, on a large class of such spacetimes. Our main result establishes that if $\phi$ vanishes to suffi... |
1712.09474 | Parampreet Singh | Sahil Saini, Parampreet Singh | Generic absence of strong singularities in loop quantum Bianchi-IX
spacetimes | 23 pages | null | 10.1088/1361-6382/aaad79 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the generic resolution of strong singularities in loop quantized
effective Bianchi-IX spacetime in two different quantizations - the connection
operator based `A' quantization and the extrinsic curvature based `K'
quantization. We show that in the effective spacetime description with
arbitrary matter content... | [
{
"created": "Wed, 27 Dec 2017 01:35:08 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Saini",
"Sahil",
""
],
[
"Singh",
"Parampreet",
""
]
] | We study the generic resolution of strong singularities in loop quantized effective Bianchi-IX spacetime in two different quantizations - the connection operator based `A' quantization and the extrinsic curvature based `K' quantization. We show that in the effective spacetime description with arbitrary matter content, ... |
1306.6486 | Emma Jakobsson | Ingemar Bengtsson, Emma Jakobsson, Jos\'e M. M. Senovilla | Trapped surfaces in Oppenheimer-Snyder black holes | 34 pages, 7 figures | Phys. Rev. D 88 (2013) 064012 | 10.1103/PhysRevD.88.064012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Oppenheimer-Snyder solution models a homogeneous round dust cloud
collapsing to a black hole. Inside its event horizon there is a region through
which trapped surfaces pass. We try to determine exactly where the boundary of
this region meets the centre of the cloud. We present explicit examples of the
relevant tr... | [
{
"created": "Thu, 27 Jun 2013 13:03:46 GMT",
"version": "v1"
}
] | 2013-09-17 | [
[
"Bengtsson",
"Ingemar",
""
],
[
"Jakobsson",
"Emma",
""
],
[
"Senovilla",
"José M. M.",
""
]
] | The Oppenheimer-Snyder solution models a homogeneous round dust cloud collapsing to a black hole. Inside its event horizon there is a region through which trapped surfaces pass. We try to determine exactly where the boundary of this region meets the centre of the cloud. We present explicit examples of the relevant trap... |
2106.10242 | Zhengcheng Gu | Tianyao Fang and Zheng-Cheng Gu | Topological gravity in 3+1D and a possible origin of dark matte | 24 pages, comments and suggestions are welcome | null | null | null | gr-qc cond-mat.str-el math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Dark matter is one of the deepest mystery of the universe. So far there is no
natural explanation why the dark matter should exist and even dominate the
universe. In this paper, we begin with a 3+1D topological gravity theory which
is super renormalizable with vanishing beta functions, then we argue that
Einstein gra... | [
{
"created": "Fri, 18 Jun 2021 17:08:33 GMT",
"version": "v1"
}
] | 2021-06-21 | [
[
"Fang",
"Tianyao",
""
],
[
"Gu",
"Zheng-Cheng",
""
]
] | Dark matter is one of the deepest mystery of the universe. So far there is no natural explanation why the dark matter should exist and even dominate the universe. In this paper, we begin with a 3+1D topological gravity theory which is super renormalizable with vanishing beta functions, then we argue that Einstein gravi... |
1811.07786 | Enrico Barausse | Oscar Ramos and Enrico Barausse | Constraints on Ho\v{r}ava gravity from binary black hole observations | 18 pages, 4 figures; typos corrected and one reference added in
version 2, to match published version; v3: typo in eq 17b corrected in
erratum (typo does not propagate, results unchanged) | Phys. Rev. D 99, 024034 (2019) | 10.1103/PhysRevD.99.024034 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ho\v{r}ava gravity breaks Lorentz symmetry by introducing a preferred
spacetime foliation, which is defined by a timelike dynamical scalar field, the
khronon. The presence of this preferred foliation makes black hole solutions
more complicated than in General Relativity, with the appearance of multiple
distinct event... | [
{
"created": "Mon, 19 Nov 2018 16:38:15 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2019 17:18:45 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Sep 2021 09:03:49 GMT",
"version": "v3"
}
] | 2021-09-07 | [
[
"Ramos",
"Oscar",
""
],
[
"Barausse",
"Enrico",
""
]
] | Ho\v{r}ava gravity breaks Lorentz symmetry by introducing a preferred spacetime foliation, which is defined by a timelike dynamical scalar field, the khronon. The presence of this preferred foliation makes black hole solutions more complicated than in General Relativity, with the appearance of multiple distinct event h... |
1807.09214 | Donato Bini | Kjell Rosquist, Donato Bini, Bahram Mashhoon | Twisted Gravitational Waves of Petrov Type D | 22 pages, RevTex macros; v2: typos corrected, matches published
version | Phys. Rev. D 98, 064039 (2018) | 10.1103/PhysRevD.98.064039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Twisted gravitational waves (TGWs) are nonplanar unidirectional Ricci-flat
solutions of general relativity. Thus far only TGWs of Petrov type \emph{II}
are implicitly known that depend on a solution of a partial differential
equation and have wave fronts with negative Gaussian curvature. A special
Petrov type \emph{D... | [
{
"created": "Tue, 24 Jul 2018 16:24:12 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Sep 2018 13:32:50 GMT",
"version": "v2"
}
] | 2018-09-25 | [
[
"Rosquist",
"Kjell",
""
],
[
"Bini",
"Donato",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | Twisted gravitational waves (TGWs) are nonplanar unidirectional Ricci-flat solutions of general relativity. Thus far only TGWs of Petrov type \emph{II} are implicitly known that depend on a solution of a partial differential equation and have wave fronts with negative Gaussian curvature. A special Petrov type \emph{D} ... |
gr-qc/0606129 | George Sparling | George Sparling | The structure of cosmic time | 39 pages | null | null | null | gr-qc | null | Following the approach of Julien Lesgourgues [astro-ph/0409426], we analyze
the mathematical structure of the time co-ordinate of present day cosmological
models, where these models include a cosmological constant term to account for
the observed acceleration of the universe: we find that in all cases, except
for a s... | [
{
"created": "Thu, 29 Jun 2006 19:19:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sparling",
"George",
""
]
] | Following the approach of Julien Lesgourgues [astro-ph/0409426], we analyze the mathematical structure of the time co-ordinate of present day cosmological models, where these models include a cosmological constant term to account for the observed acceleration of the universe: we find that in all cases, except for a set... |
1510.04713 | Mengjie Wang | Mengjie Wang, Carlos Herdeiro, Marco O. P. Sampaio | Maxwell perturbations on asymptotically anti-de Sitter spacetimes:
Generic boundary conditions and a new branch of quasinormal modes | v2. Slight revision of the paper's title and other minor changes | Phys. Rev. D 92, 124006 (2015) | 10.1103/PhysRevD.92.124006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbations of asymptotically Anti-de-Sitter (AdS) spacetimes are often
considered by imposing field vanishing boundary conditions (BCs) at the AdS
boundary. Such BCs, of Dirichlet-type, imply a vanishing energy flux at the
boundary, but the converse is, generically, not true. Regarding AdS as a
gravitational box, ... | [
{
"created": "Thu, 15 Oct 2015 20:38:20 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Dec 2015 23:24:10 GMT",
"version": "v2"
}
] | 2015-12-04 | [
[
"Wang",
"Mengjie",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Sampaio",
"Marco O. P.",
""
]
] | Perturbations of asymptotically Anti-de-Sitter (AdS) spacetimes are often considered by imposing field vanishing boundary conditions (BCs) at the AdS boundary. Such BCs, of Dirichlet-type, imply a vanishing energy flux at the boundary, but the converse is, generically, not true. Regarding AdS as a gravitational box, we... |
1806.04253 | Paolo Pani | Adriano Testa and Paolo Pani | Analytical template for gravitational-wave echoes: signal
characterization and prospects of detection with current and future
interferometers | v3: 13+4 pages, 11 figures, 4 appendices; matches the PRD version
with a new plot and extended results. v2 (submitted version): 12 pages + 4
appendices; 9 figures. Further discussion and new appendix with template for
localized sources at generic position. Template and waveforms available at
https://www.darkgra... | Phys. Rev. D 98, 044018 (2018) | 10.1103/PhysRevD.98.044018 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave echoes in the post-merger ringdown phase are under intense
scrutiny as probes of near-horizon quantum structures and as signatures of
exotic states of matter in ultracompact stars. We present an analytical
template that describes the ringdown and the echo signal for nonspinning
objects in terms of ... | [
{
"created": "Mon, 11 Jun 2018 21:44:28 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jun 2018 14:38:44 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Sep 2018 13:28:21 GMT",
"version": "v3"
}
] | 2018-09-18 | [
[
"Testa",
"Adriano",
""
],
[
"Pani",
"Paolo",
""
]
] | Gravitational-wave echoes in the post-merger ringdown phase are under intense scrutiny as probes of near-horizon quantum structures and as signatures of exotic states of matter in ultracompact stars. We present an analytical template that describes the ringdown and the echo signal for nonspinning objects in terms of tw... |
2204.02435 | Cenalo Vaz | Cenalo Vaz | Quantum Collapse of a Thin Shell Revisited | 14 pages, no figures. To appear in Phys. Rev. D | null | 10.1103/PhysRevD.105.086020 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | There are several possible choices of the time parameter for the canonical
description of a self-gravitating thin shell, but quantum thories built on
different time parameters lead to unitarily inequivalent descriptions. We
compare the quantum collapse of a thin dust shell in two different times {\it
viz.,} the time ... | [
{
"created": "Tue, 5 Apr 2022 18:27:16 GMT",
"version": "v1"
}
] | 2022-05-04 | [
[
"Vaz",
"Cenalo",
""
]
] | There are several possible choices of the time parameter for the canonical description of a self-gravitating thin shell, but quantum thories built on different time parameters lead to unitarily inequivalent descriptions. We compare the quantum collapse of a thin dust shell in two different times {\it viz.,} the time co... |
2302.12609 | Bernard J. Carr | B. J. Carr | The Generalized Uncertainty Principle and Higher Dimensions: Linking
Black Holes and Elementary Particles | 17 pages, 5 figures | Frontiers in Astronomy and Space Sciences 9:1008221 (2022) | 10.3389/fspas.2022.1008221 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes play an important role in linking microphysics with macrophysics,
with those of the Planck mass ($M_P \sim10^{-5}$g) featuring in any theory of
quantum gravity. In particular, the Compton-Schwarzschild correspondence posits
a smooth transition between the Compton wavelength ($R_C \propto 1/M$) below
the P... | [
{
"created": "Fri, 24 Feb 2023 12:51:41 GMT",
"version": "v1"
}
] | 2023-02-27 | [
[
"Carr",
"B. J.",
""
]
] | Black holes play an important role in linking microphysics with macrophysics, with those of the Planck mass ($M_P \sim10^{-5}$g) featuring in any theory of quantum gravity. In particular, the Compton-Schwarzschild correspondence posits a smooth transition between the Compton wavelength ($R_C \propto 1/M$) below the Pla... |
gr-qc/9411028 | Franz Embacher | Franz Embacher | The trace left by signature-change-induced compactification | 15 pages, LaTeX, no figures | Class.Quant.Grav.12:1723-1732,1995 | 10.1088/0264-9381/12/7/014 | UWThPh-1994-55 | gr-qc | null | Recently, it has been shown that an infinite succession of classical
signature changes (''signature oscillations'') can compactify and stabilize
internal dimensions, and simultaneously leads, after a coarse graining type of
average procedure, to an effective (''physical'') space-time geometry
displaying the usual Lor... | [
{
"created": "Fri, 11 Nov 1994 11:17:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Embacher",
"Franz",
""
]
] | Recently, it has been shown that an infinite succession of classical signature changes (''signature oscillations'') can compactify and stabilize internal dimensions, and simultaneously leads, after a coarse graining type of average procedure, to an effective (''physical'') space-time geometry displaying the usual Loren... |
gr-qc/0605057 | Llu\'is Bel | Ll. Bel | A look inside the theory of the linear approximation | 14 pages, typos corrected, section replaced | null | null | null | gr-qc | null | We introduce in the framework of the linear approximation of General
relativity a natural distinction between General gauge transformations
generated by any vector field and those Special ones for which this vector
field is a gradient. This allows to introduce geometrical objects that are not
invariant under General ... | [
{
"created": "Wed, 10 May 2006 11:19:51 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2007 08:41:54 GMT",
"version": "v2"
},
{
"created": "Sat, 23 Jun 2007 17:06:55 GMT",
"version": "v3"
}
] | 2007-06-23 | [
[
"Bel",
"Ll.",
""
]
] | We introduce in the framework of the linear approximation of General relativity a natural distinction between General gauge transformations generated by any vector field and those Special ones for which this vector field is a gradient. This allows to introduce geometrical objects that are not invariant under General ga... |
gr-qc/9607063 | Alberto Carlini | A. Carlini and I.D. Novikov | Time machines and the Principle of Self-Consistency as a consequence of
the Principle of Stationary Action (II): the Cauchy problem for a
self-interacting relativistic particle | 39 pages, latex file | Int.J.Mod.Phys. D5 (1996) 445-480 | 10.1142/S021827189600028X | TIT/HEP-338/COSMO-75 | gr-qc hep-th | null | We consider the action principle to derive the classical, relativistic motion
of a self-interacting particle in a 4-D Lorentzian spacetime containing a
wormhole and which allows the existence of closed time-like curves. In
particular, we study the case of a pointlike particle subject to a
`hard-sphere' self-interacti... | [
{
"created": "Wed, 24 Jul 1996 14:54:25 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Carlini",
"A.",
""
],
[
"Novikov",
"I. D.",
""
]
] | We consider the action principle to derive the classical, relativistic motion of a self-interacting particle in a 4-D Lorentzian spacetime containing a wormhole and which allows the existence of closed time-like curves. In particular, we study the case of a pointlike particle subject to a `hard-sphere' self-interaction... |
2112.02584 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Pre-Inflationary Bounce Effects on Primordial Gravitational Waves of
$f(R)$ Gravity | PLB Accepted | null | 10.1016/j.physletb.2021.136817 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we shall study a possible pre-inflationary scenario for our
Universe and how this might be realized by $f(R)$ gravity. Specifically, we
shall introduce a scenario in which the Universe in the pre-inflationary era
contracts until it reaches a minimum magnitude, and subsequently expands,
slowly entering a ... | [
{
"created": "Sun, 5 Dec 2021 14:35:16 GMT",
"version": "v1"
}
] | 2022-01-05 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we shall study a possible pre-inflationary scenario for our Universe and how this might be realized by $f(R)$ gravity. Specifically, we shall introduce a scenario in which the Universe in the pre-inflationary era contracts until it reaches a minimum magnitude, and subsequently expands, slowly entering a sl... |
1408.3449 | M.A.M. Souza | Jamilton Rodrigues and Marcos Souza | Getting inflationary models using the deformation method | 6 pages, 2 figures | Phys. Scr. 90 (2015) 045301 | 10.1088/0031-8949/90/4/045301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we show that the dynamics associated with slow-roll models of
inflation can be investigated through a method called deformation procedure.
Using the latter, we explicitly derive an expression linking two slow-roll
inflationary potentials, applying the resulting framework to show how to
construct an eter... | [
{
"created": "Fri, 15 Aug 2014 00:31:18 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Mar 2015 14:53:50 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Rodrigues",
"Jamilton",
""
],
[
"Souza",
"Marcos",
""
]
] | In this paper we show that the dynamics associated with slow-roll models of inflation can be investigated through a method called deformation procedure. Using the latter, we explicitly derive an expression linking two slow-roll inflationary potentials, applying the resulting framework to show how to construct an eterna... |
1003.1386 | Chris Van Den Broeck | Chris Van Den Broeck | Compact binary coalescence and the science case for Einstein Telescope | 3 pages, 6 eps figures. (Very) brief summary of a talk given at the
12th Marcel Grossmann meeting; to appear in the Proceedings | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein Telescope (ET) is a possible third generation ground-based
gravitational wave observatory for which a design study is currently being
carried out. A brief (and non-exhaustive) overview is given of ET's projected
capabilities regarding astrophysics and cosmology through observations of
inspiraling and coalesc... | [
{
"created": "Sat, 6 Mar 2010 14:19:05 GMT",
"version": "v1"
}
] | 2010-03-09 | [
[
"Broeck",
"Chris Van Den",
""
]
] | Einstein Telescope (ET) is a possible third generation ground-based gravitational wave observatory for which a design study is currently being carried out. A brief (and non-exhaustive) overview is given of ET's projected capabilities regarding astrophysics and cosmology through observations of inspiraling and coalescin... |
1702.01162 | Salvatore Capozziello | S. Capozziello, M. Capriolo, M. Transirico | The gravitational energy-momentum pseudo-tensor of Higher-Order Theories
of Gravity | 23 pages, to be published in Annalen der Physik | null | 10.1002/andp.201600376 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the gravitational energy momentum tensor $\tau^{\eta}_{\alpha}$ for
a general Lagrangian of any order $L=L\left(g_{\mu\nu}, g_{\mu\nu,i_{1}},
g_{\mu\nu,i_{1}i_{2}},g_{\mu\nu,i_{1}i_{2}i_{3}},\cdots,
g_{\mu\nu,i_{1}i_{2}i_{3}\cdots i_{n}}\right)$ and in particular for a
Lagrangian such as $L_{g}=(\overline{R... | [
{
"created": "Fri, 3 Feb 2017 21:14:50 GMT",
"version": "v1"
}
] | 2017-05-24 | [
[
"Capozziello",
"S.",
""
],
[
"Capriolo",
"M.",
""
],
[
"Transirico",
"M.",
""
]
] | We derive the gravitational energy momentum tensor $\tau^{\eta}_{\alpha}$ for a general Lagrangian of any order $L=L\left(g_{\mu\nu}, g_{\mu\nu,i_{1}}, g_{\mu\nu,i_{1}i_{2}},g_{\mu\nu,i_{1}i_{2}i_{3}},\cdots, g_{\mu\nu,i_{1}i_{2}i_{3}\cdots i_{n}}\right)$ and in particular for a Lagrangian such as $L_{g}=(\overline{R}+... |
1807.04212 | Diego Carranza | Diego A. Carranza and Juan A. Valiente Kroon | Construction of anti-de Sitter-like spacetimes using the metric
conformal Einstein field equations: the vacuum case | 29 pages, 1 figure | Class. Quantum Grav. 35, 245006 (2018) | 10.1088/1361-6382/aaeb54 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make use of the metric version of the conformal Einstein field equations
to construct anti-de Sitter-like spacetimes by means of a suitably posed
initial-boundary value problem. The evolution system associated to this
initial-boundary value problem consists of a set of conformal wave equations
for a number of conf... | [
{
"created": "Wed, 11 Jul 2018 15:57:15 GMT",
"version": "v1"
}
] | 2018-12-19 | [
[
"Carranza",
"Diego A.",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | We make use of the metric version of the conformal Einstein field equations to construct anti-de Sitter-like spacetimes by means of a suitably posed initial-boundary value problem. The evolution system associated to this initial-boundary value problem consists of a set of conformal wave equations for a number of confor... |
1112.0821 | Kouji Nakamura | Kouji Nakamura | Short note on construction of gauge-invariant variables of linear metric
perturbations on an arbitrary background spacetime | 4 pages, no figures, jgrg21.sty is used. Prepared for the proceedings
of the International Conference JGRG21 (2011, Sendai, Japan) | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An outline of a proof of the decomposition of linear metric perturbations
into gauge-invariant and gauge-variant parts on an arbitrary background
spacetime which admits ADM decomposition is briefly discussed. We explicitly
construct the gauge-invariant and gauge-variant parts of the linear metric
perturbations based ... | [
{
"created": "Mon, 5 Dec 2011 02:05:54 GMT",
"version": "v1"
}
] | 2011-12-06 | [
[
"Nakamura",
"Kouji",
""
]
] | An outline of a proof of the decomposition of linear metric perturbations into gauge-invariant and gauge-variant parts on an arbitrary background spacetime which admits ADM decomposition is briefly discussed. We explicitly construct the gauge-invariant and gauge-variant parts of the linear metric perturbations based on... |
0905.1244 | Salvatore Capozziello | S. Capozziello, V.I. Man'ko, G. Marmo, C. Stornaiolo | A tomographic description for classical and quantum cosmological
perturbations | 12 pages | null | 10.1088/0031-8949/80/04/045901 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical and quantum perturbations can be described in terms of marginal
distribution functions in the framework of tomographic cosmology. In
particular, the so called Radon transformation and the mode-parametric quantum
oscillator description can give rise to links between quantum and classical
regimes. The approac... | [
{
"created": "Fri, 8 May 2009 12:43:27 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Capozziello",
"S.",
""
],
[
"Man'ko",
"V. I.",
""
],
[
"Marmo",
"G.",
""
],
[
"Stornaiolo",
"C.",
""
]
] | Classical and quantum perturbations can be described in terms of marginal distribution functions in the framework of tomographic cosmology. In particular, the so called Radon transformation and the mode-parametric quantum oscillator description can give rise to links between quantum and classical regimes. The approach ... |
gr-qc/0302033 | Laszlo B. Szabados | Laszlo B. Szabados | On the roots of the Poincare structure of asymptotically flat spacetimes | 34 pages, plain TEX, misleading notations changed, discussion
improved and corrected, appearing in Class. Quantum Grav | Class.Quant.Grav. 20 (2003) 2627-2662 | 10.1088/0264-9381/20/13/312 | null | gr-qc | null | The analysis of vacuum general relativity by R. Beig and N. O Murchadha (Ann.
Phys. vol 174, 463 (1987)) is extended in numerous ways. The weakest possible
power-type fall-off conditions for the energy-momentum tensor, the metric, the
extrinsic curvature, the lapse and the shift are determined, which, together
with t... | [
{
"created": "Mon, 10 Feb 2003 15:45:12 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Apr 2003 15:43:15 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Szabados",
"Laszlo B.",
""
]
] | The analysis of vacuum general relativity by R. Beig and N. O Murchadha (Ann. Phys. vol 174, 463 (1987)) is extended in numerous ways. The weakest possible power-type fall-off conditions for the energy-momentum tensor, the metric, the extrinsic curvature, the lapse and the shift are determined, which, together with the... |
1404.1802 | Jacob D. Bekenstein | Jacob D. Bekenstein | Optimizing entropy bounds for macroscopic systems | 13 pages, 2 figures, LaTeX | Phys. Rev. E 89, 052137 (2014) | 10.1103/PhysRevE.89.052137 | null | gr-qc hep-th physics.chem-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The universal bound on specific entropy was originally inferred from black
hole thermodynamics. We here show from classical thermodynamics alone that for
a system at fixed volume or fixed pressure, the ratio of entropy to
nonrelativistic energy has a unique maximum $(S/E)_\mathrm{max}$. A simple
argument from quantum... | [
{
"created": "Mon, 7 Apr 2014 14:45:23 GMT",
"version": "v1"
},
{
"created": "Wed, 28 May 2014 11:18:51 GMT",
"version": "v2"
}
] | 2014-05-29 | [
[
"Bekenstein",
"Jacob D.",
""
]
] | The universal bound on specific entropy was originally inferred from black hole thermodynamics. We here show from classical thermodynamics alone that for a system at fixed volume or fixed pressure, the ratio of entropy to nonrelativistic energy has a unique maximum $(S/E)_\mathrm{max}$. A simple argument from quantum d... |
2211.10733 | Roman Ilin | R.V. Ilin, S.A. Paston | Dual models for p-form mimetic gravity and their connection to perfect
fluids consisting of (p+1)-branes | 9 pages, published version | Phys. Lett. B 841 (2023) 137952 | 10.1016/j.physletb.2023.137952 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an approach that allows one to reformulate $n$-dimensional
$p$-form mimetic gravity (including usual mimetic gravity as particular case $p
= 0$) as nonlinear $(n-p-1)$-form electrodynamics via electric-magnetic
duality. The resulting dual Lagrangian density is just the square root of the
ordinary quadratic... | [
{
"created": "Sat, 19 Nov 2022 15:58:59 GMT",
"version": "v1"
},
{
"created": "Mon, 15 May 2023 22:48:41 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Ilin",
"R. V.",
""
],
[
"Paston",
"S. A.",
""
]
] | We propose an approach that allows one to reformulate $n$-dimensional $p$-form mimetic gravity (including usual mimetic gravity as particular case $p = 0$) as nonlinear $(n-p-1)$-form electrodynamics via electric-magnetic duality. The resulting dual Lagrangian density is just the square root of the ordinary quadratic L... |
2006.08398 | Lorenzo Resca Dr. | Lorenzo Gallerani Resca | Cosmological Mass of the Photon and Dark Energy as its Bose-Einstein
Condensate in de Sitter Space | null | Indian J Phys 97 605 2023 | 10.1007/s12648-022-02395-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I develop a physical picture of dark energy (DE) based on fundamental
principles and constants of quantum mechanics (QM) and general relativity (GR)
theories. It derives from a conjecture of non-zero masses for nearly
standard-model photons, based on QM localization at a cosmological scale. Dark
energy is associated ... | [
{
"created": "Mon, 15 Jun 2020 13:41:02 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Aug 2021 23:17:42 GMT",
"version": "v10"
},
{
"created": "Fri, 3 Sep 2021 02:27:28 GMT",
"version": "v11"
},
{
"created": "Wed, 29 Dec 2021 23:42:49 GMT",
"version": "v12"
},
{
"... | 2023-02-23 | [
[
"Resca",
"Lorenzo Gallerani",
""
]
] | I develop a physical picture of dark energy (DE) based on fundamental principles and constants of quantum mechanics (QM) and general relativity (GR) theories. It derives from a conjecture of non-zero masses for nearly standard-model photons, based on QM localization at a cosmological scale. Dark energy is associated wi... |
1011.6280 | Peter Phillips | Peter R. Phillips | Conformal cosmology with a positive effective gravitational constant | null | null | 10.1111/j.1365-2966.2011.19408.x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conformal cosmological model presented by Mannheim predicts a negative
value for the effective gravitational constant, G. It also involves a scalar
field, S, which is treated classically. In this paper we point out that a
classical treatment of S is inappropriate, because the Hamiltonian is
non-Hermitean, and the... | [
{
"created": "Mon, 29 Nov 2010 16:31:36 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Phillips",
"Peter R.",
""
]
] | The conformal cosmological model presented by Mannheim predicts a negative value for the effective gravitational constant, G. It also involves a scalar field, S, which is treated classically. In this paper we point out that a classical treatment of S is inappropriate, because the Hamiltonian is non-Hermitean, and the t... |
gr-qc/0005046 | Gyq | Guoying Chee and Yanhua Jia | Self-Dual Conformal Supergravity and the Hamiltonian Formulation | null | Gen.Rel.Grav. 33 (2001) 1953-1972 | 10.1023/A:1013098909922 | null | gr-qc | null | In terms of Dirac matrices the self-dual and anti-self-dual decomposition of
a conformal supergravity is given and a self-dual conformal supergravity theory
is developed as a connection dynamic theory in which the basic dynamic variabes
include the self-dual spin connection i.e. the Ashtekar connection rather than
th... | [
{
"created": "Sat, 13 May 2000 07:56:48 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Chee",
"Guoying",
""
],
[
"Jia",
"Yanhua",
""
]
] | In terms of Dirac matrices the self-dual and anti-self-dual decomposition of a conformal supergravity is given and a self-dual conformal supergravity theory is developed as a connection dynamic theory in which the basic dynamic variabes include the self-dual spin connection i.e. the Ashtekar connection rather than the ... |
2308.15604 | Robert Conte | Robert Conte (ENS Paris-Saclay) | On a dynamical system linked to the BKL scenario | 9 pages, to appear, Physica scripta | null | null | null | gr-qc nlin.SI | http://creativecommons.org/licenses/by/4.0/ | We consider the six-dimensional dynamical system in three components
introduced by Ryan to describe the scenario of Belinskii, Khalatnikov and
Lifshitz to the cosmological singularity when the spatial metric tensor is not
diagonal. Despite its nonintegrability, recently proven by Goldstein and
Piechocki, the three fo... | [
{
"created": "Tue, 29 Aug 2023 19:53:57 GMT",
"version": "v1"
}
] | 2023-08-31 | [
[
"Conte",
"Robert",
"",
"ENS Paris-Saclay"
]
] | We consider the six-dimensional dynamical system in three components introduced by Ryan to describe the scenario of Belinskii, Khalatnikov and Lifshitz to the cosmological singularity when the spatial metric tensor is not diagonal. Despite its nonintegrability, recently proven by Goldstein and Piechocki, the three four... |
2012.14423 | Manuel Hohmann | Manuel Hohmann and Christian Pfeifer | Teleparallel axions and cosmology | 16 pages, 4 figures; journal version | Eur.Phys.J. C81 (2021) no.4, 376 | 10.1140/epjc/s10052-021-09165-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the most general teleparallel theory of gravity whose action is a
linear combination of the five scalar invariants which are quadratic in the
torsion tensor. Since two of these invariants possess odd parity, they
naturally allow for a coupling to pseudo-scalar fields, thus yielding a
Lagrangian which is e... | [
{
"created": "Mon, 28 Dec 2020 18:59:00 GMT",
"version": "v1"
},
{
"created": "Sat, 8 May 2021 21:05:45 GMT",
"version": "v2"
}
] | 2021-05-11 | [
[
"Hohmann",
"Manuel",
""
],
[
"Pfeifer",
"Christian",
""
]
] | We consider the most general teleparallel theory of gravity whose action is a linear combination of the five scalar invariants which are quadratic in the torsion tensor. Since two of these invariants possess odd parity, they naturally allow for a coupling to pseudo-scalar fields, thus yielding a Lagrangian which is eve... |
2006.12162 | Bjoern S. Schmekel | Bjoern S. Schmekel | Note on the Conservation of Quasi-Local Energy in an Expanding Universe | 3 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Whether energy is conserved in a universe which keeps expanding is an
intriguing question. It is tempting to argue that the total energy within the
universe would have to increase as the universe expands. Upon more detailed
inspection the question is a lot harder to settle since defining what is meant
by energy or ev... | [
{
"created": "Mon, 22 Jun 2020 11:46:53 GMT",
"version": "v1"
}
] | 2020-06-23 | [
[
"Schmekel",
"Bjoern S.",
""
]
] | Whether energy is conserved in a universe which keeps expanding is an intriguing question. It is tempting to argue that the total energy within the universe would have to increase as the universe expands. Upon more detailed inspection the question is a lot harder to settle since defining what is meant by energy or even... |
0708.2360 | Demosthenes Kazanas | Manasse R. Mbonye and Demosthenes Kazanas | Can gravitational collapse sustain singularity-free trapped surfaces? | 17 pages, 3 figures, accepted for publication in International
Journal of Modern Physics D | Int.J.Mod.Phys.D17:165-177,2008 | 10.1142/S0218271808011924 | null | gr-qc astro-ph hep-th | null | In singularity generating spacetimes both the out-going and in-going
expansions of null geodesic congruences $\theta ^{+}$ and $\theta ^{-}$ should
become increasingly negative without bound, inside the horizon. This behavior
leads to geodetic incompleteness which in turn predicts the existence of a
singularity. In t... | [
{
"created": "Fri, 17 Aug 2007 12:59:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mbonye",
"Manasse R.",
""
],
[
"Kazanas",
"Demosthenes",
""
]
] | In singularity generating spacetimes both the out-going and in-going expansions of null geodesic congruences $\theta ^{+}$ and $\theta ^{-}$ should become increasingly negative without bound, inside the horizon. This behavior leads to geodetic incompleteness which in turn predicts the existence of a singularity. In thi... |
gr-qc/0504110 | Edward Malec | Edward Malec and Grzegorz Wylezek | The Huygens principle and cosmological gravitational waves in the
Regge-Wheeler gauge | 4 pages | Class.Quant.Grav. 22 (2005) 3549-3554 | 10.1088/0264-9381/22/17/013 | null | gr-qc astro-ph | null | We study the propagation of axial gravitational waves in Friedman universes.
The evolution equation is obtained in the Regge-Wheeler gauge. The
gravitational waves obey the Huygens principle in the radiation dominated era,
but in the matter dominated universe their propagation depends on their
wavelengths, with the s... | [
{
"created": "Fri, 22 Apr 2005 14:37:21 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Apr 2005 14:33:17 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Malec",
"Edward",
""
],
[
"Wylezek",
"Grzegorz",
""
]
] | We study the propagation of axial gravitational waves in Friedman universes. The evolution equation is obtained in the Regge-Wheeler gauge. The gravitational waves obey the Huygens principle in the radiation dominated era, but in the matter dominated universe their propagation depends on their wavelengths, with the sca... |
1003.4112 | Paulo M. S\'a | Paulo M. S\'a and Alfredo B. Henriques | Gravitational wave generation in hybrid quintessential inflationary
models | 10 pages, 11 figures, one reference added | Phys.Rev.D81:124043,2010 | 10.1103/PhysRevD.81.124043 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the generation of gravitational waves in the hybrid
quintessential inflationary model. The full gravitational-wave energy spectrum
is calculated using the method of continuous Bogoliubov coefficients. The
post-inflationary kination period, characteristic of quintessential
inflationary models, leaves a ... | [
{
"created": "Mon, 22 Mar 2010 10:19:35 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 2010 09:29:30 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"Sá",
"Paulo M.",
""
],
[
"Henriques",
"Alfredo B.",
""
]
] | We investigate the generation of gravitational waves in the hybrid quintessential inflationary model. The full gravitational-wave energy spectrum is calculated using the method of continuous Bogoliubov coefficients. The post-inflationary kination period, characteristic of quintessential inflationary models, leaves a cl... |
1611.07529 | Patricia Schmidt | Chad R. Galley, Patricia Schmidt | Fast and efficient evaluation of gravitational waveforms via
reduced-order spline interpolation | 28 pages, 13 figures | null | null | LIGO-P1600064 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical simulations of merging black hole binaries produce the most
accurate gravitational waveforms. The availability of hundreds of these
numerical relativity (NR) waveforms, often containing many higher spherical
harmonic modes, allows one to study many aspects of gravitational waves.
Amongst these are the respo... | [
{
"created": "Tue, 22 Nov 2016 21:00:04 GMT",
"version": "v1"
}
] | 2016-11-24 | [
[
"Galley",
"Chad R.",
""
],
[
"Schmidt",
"Patricia",
""
]
] | Numerical simulations of merging black hole binaries produce the most accurate gravitational waveforms. The availability of hundreds of these numerical relativity (NR) waveforms, often containing many higher spherical harmonic modes, allows one to study many aspects of gravitational waves. Amongst these are the respons... |
1010.4262 | Douglas Shaw | Douglas J. Shaw and John D. Barrow | A Testable Solution of the Cosmological Constant and Coincidence
Problems | 31 pages, 4 figures; v2: version accepted by Phys. Rev. D | Phys.Rev.D83:043518,2011 | 10.1103/PhysRevD.83.043518 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new solution to the cosmological constant (CC) and coincidence
problems in which the observed value of the CC, $\Lambda$, is linked to other
observable properties of the universe. This is achieved by promoting the CC
from a parameter which must to specified, to a field which can take many
possible values... | [
{
"created": "Wed, 20 Oct 2010 18:02:49 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Feb 2011 09:32:08 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Shaw",
"Douglas J.",
""
],
[
"Barrow",
"John D.",
""
]
] | We present a new solution to the cosmological constant (CC) and coincidence problems in which the observed value of the CC, $\Lambda$, is linked to other observable properties of the universe. This is achieved by promoting the CC from a parameter which must to specified, to a field which can take many possible values. ... |
0806.0682 | Jose Ademir Sales Lima | S. H. Pereira and J. A. S. Lima | On Phantom Thermodynamics | 14 pages, no figures, text revised | Phys.Lett.B669:266-270,2008 | 10.1016/j.physletb.2008.10.006 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic properties of dark energy fluids described by an equation
of state parameter $\omega=p/\rho$ are rediscussed in the context of FRW type
geometries. Contrarily to previous claims, it is argued here that the phantom
regime $\omega<-1$ is not physically possible since that both the temperature
and the ... | [
{
"created": "Wed, 4 Jun 2008 03:20:14 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Oct 2008 17:37:51 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Pereira",
"S. H.",
""
],
[
"Lima",
"J. A. S.",
""
]
] | The thermodynamic properties of dark energy fluids described by an equation of state parameter $\omega=p/\rho$ are rediscussed in the context of FRW type geometries. Contrarily to previous claims, it is argued here that the phantom regime $\omega<-1$ is not physically possible since that both the temperature and the en... |
gr-qc/0011019 | Spiros Cotsakis | John Miritzis, Peter Leach and Spiros Cotsakis | Symmetry, Singularities and Integrability in Complex Dynamics IV:
Painleve Integrability of Isotropic Cosmologies | 9 pp, latex, gc style, to appear in Grav.Cosm | Grav.Cosmol. 6 (2000) 282-290 | null | null | gr-qc | null | We apply the results of singularity analysis to the isotropic cosmological
models in general relativity and string theory with a variety of matter terms.
For some of these models the standard Painlev\'{e} test is sufficient to
demonstrate integrability or nonintegrability in the sense of Painlev\'{e}. For
others of t... | [
{
"created": "Mon, 6 Nov 2000 17:57:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Miritzis",
"John",
""
],
[
"Leach",
"Peter",
""
],
[
"Cotsakis",
"Spiros",
""
]
] | We apply the results of singularity analysis to the isotropic cosmological models in general relativity and string theory with a variety of matter terms. For some of these models the standard Painlev\'{e} test is sufficient to demonstrate integrability or nonintegrability in the sense of Painlev\'{e}. For others of the... |
1502.05388 | Ian Jubb | Michel Buck, Fay Dowker, Ian Jubb and Sumati Surya | Boundary Terms for Causal Sets | null | Class.Quant.Grav. 32 (2015) 20, 205004 | 10.1088/0264-9381/32/20/205004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a family of boundary terms for the action of a causal set with a
spacelike boundary. We show that in the continuum limit one recovers the
Gibbons-Hawking-York boundary term in the mean. We also calculate the continuum
limit of the mean causal set action for an Alexandrov interval in flat
spacetime. We find... | [
{
"created": "Wed, 18 Feb 2015 20:57:12 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Oct 2015 09:53:34 GMT",
"version": "v2"
}
] | 2015-10-30 | [
[
"Buck",
"Michel",
""
],
[
"Dowker",
"Fay",
""
],
[
"Jubb",
"Ian",
""
],
[
"Surya",
"Sumati",
""
]
] | We propose a family of boundary terms for the action of a causal set with a spacelike boundary. We show that in the continuum limit one recovers the Gibbons-Hawking-York boundary term in the mean. We also calculate the continuum limit of the mean causal set action for an Alexandrov interval in flat spacetime. We find t... |
2312.11899 | Hiroaki Tahara | Hiroaki W. H. Tahara, Kazufumi Takahashi, Masato Minamitsuji, Hayato
Motohashi | Exact solution for rotating black holes in parity-violating gravity | 19 pages, 8 figures | Progress of Theoretical and Experimental Physics, Volume 2024,
Issue 5, May 2024, 053E02 | 10.1093/ptep/ptae046 | RUP-23-26, YITP-23-147 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has recently been pointed out that one can construct invertible conformal
transformations with a parity-violating conformal factor, which can be employed
to generate a novel class of parity-violating ghost-free metric theories from
general relativity. We obtain exact solutions for rotating black holes in such
theo... | [
{
"created": "Tue, 19 Dec 2023 06:50:28 GMT",
"version": "v1"
},
{
"created": "Mon, 20 May 2024 12:44:13 GMT",
"version": "v2"
}
] | 2024-05-21 | [
[
"Tahara",
"Hiroaki W. H.",
""
],
[
"Takahashi",
"Kazufumi",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Motohashi",
"Hayato",
""
]
] | It has recently been pointed out that one can construct invertible conformal transformations with a parity-violating conformal factor, which can be employed to generate a novel class of parity-violating ghost-free metric theories from general relativity. We obtain exact solutions for rotating black holes in such theori... |
0906.1047 | Andreas Albrecht | Andreas Albrecht | de Sitter equilibrium as a fundamental framework for cosmology | 14 pages including 2 figures. In the proceedings of the DICE2008
conference, Thomas Elze ed. (IOP 2009) V2: Typos fixed in Eqns. 1, 10, 13, 18
and 20. No other changes | null | 10.1088/1742-6596/174/1/012006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmology might turn out to be the study of fluctuations around a "de Sitter
equilibrium" state. In this article I review the basic ideas and the attractive
features of this framework, and respond to a number common questions raised
about the de Sitter equilibrium picture. I show that this framework does not
suffer f... | [
{
"created": "Fri, 5 Jun 2009 07:26:39 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Aug 2010 13:29:20 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Albrecht",
"Andreas",
""
]
] | Cosmology might turn out to be the study of fluctuations around a "de Sitter equilibrium" state. In this article I review the basic ideas and the attractive features of this framework, and respond to a number common questions raised about the de Sitter equilibrium picture. I show that this framework does not suffer fro... |
gr-qc/9901037 | Omar Benhar | O. Benhar, E. Berti and V. Ferrari | The imprint of the equation of state on the axial w-modes of oscillating
neutron stars | 9 pages, 7 figures, mn.sty | Mon.Not.Roy.Astron.Soc. 310 (1999) 797-803 | 10.1046/j.1365-8711.1999.02983.x | null | gr-qc nucl-th | null | We discuss the dependence of the pulsation frequencies of the axial
quasi-normal modes of a nonrotating neutron star upon the equation of state
describing the star interior. The continued fraction method has been used to
compute the complex frequencies for a set of equations of state based on
different physical assum... | [
{
"created": "Wed, 13 Jan 1999 14:00:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Benhar",
"O.",
""
],
[
"Berti",
"E.",
""
],
[
"Ferrari",
"V.",
""
]
] | We discuss the dependence of the pulsation frequencies of the axial quasi-normal modes of a nonrotating neutron star upon the equation of state describing the star interior. The continued fraction method has been used to compute the complex frequencies for a set of equations of state based on different physical assumpt... |
gr-qc/9711075 | Dharam V. Ahluwalia | D. V. Ahluwalia (Los Alamos) | Three Quantum Aspects of Gravity | Invited paper to appear in the Festscrift celebrating 90th birthday
of Professor Ta-You Wu | Chin.J.Phys.35:804-808,1997 | null | LA-UR-97-4809 | gr-qc | null | It is argued that (a) In the quantum realm test-particle masses have
non-trivial observability which induces a non-geometric element in gravity, (b)
Any theory of quantum gravity, on fundamental grounds, must contain an element
of non-locality that makes position measurements non-commutative, and (c) The
classical no... | [
{
"created": "Tue, 25 Nov 1997 23:15:35 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ahluwalia",
"D. V.",
"",
"Los Alamos"
]
] | It is argued that (a) In the quantum realm test-particle masses have non-trivial observability which induces a non-geometric element in gravity, (b) Any theory of quantum gravity, on fundamental grounds, must contain an element of non-locality that makes position measurements non-commutative, and (c) The classical noti... |
gr-qc/9601040 | Charles Hellaby | Charles Hellaby and Tevian dray | Reply Comment: Comparison of Approaches to Classical Signature Change | 10 pages, latex, no figures. Replying to - "Comment on `Failure of
Standard Conservation Laws at a Classical Change of Signature'", S.A.
Hayward, Phys. Rev. D52, 7331-7332 (1995) (gr-qc/9606045) | Phys.Rev. D52 (1995) 7333-7339 | 10.1103/PhysRevD.52.7333 | null | gr-qc | null | We contrast the two approaches to ``classical" signature change used by
Hayward with the one used by us (Hellaby and Dray). There is (as yet) no
rigorous derivation of appropriate distributional field equations. Hayward's
distributional approach is based on a postulated modified form of the field
equations. We make a... | [
{
"created": "Thu, 25 Jan 1996 18:21:04 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Hellaby",
"Charles",
""
],
[
"dray",
"Tevian",
""
]
] | We contrast the two approaches to ``classical" signature change used by Hayward with the one used by us (Hellaby and Dray). There is (as yet) no rigorous derivation of appropriate distributional field equations. Hayward's distributional approach is based on a postulated modified form of the field equations. We make an ... |
gr-qc/0212128 | D. V. Ahluwalia | D. V. Ahluwalia-Khalilova | Operational indistinguishabilty of doubly special relativities from
special relativity | 8 pages [This paper is no longer being pursued for publication. Its
essential, and updated, content is now available in Sec. 2 of D. V.
Ahluwalia-Khalilova, A freely falling frame at the interface of gravitational
and quantum realms, Class. Quant. Grav. 22 (2005) 1433-1450.] | null | null | null | gr-qc hep-ph hep-th | null | We argue that existing doubly special relativities may not be operationally
distinguishable from the special relativity. In the process we point out that
some of the phenomenologically motivated modifications of dispersion relations,
and arrived conclusions, must be reconsidered. Finally, we reflect on the
possible c... | [
{
"created": "Tue, 31 Dec 2002 12:49:45 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jun 2003 16:42:18 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Aug 2005 01:37:58 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Ahluwalia-Khalilova",
"D. V.",
""
]
] | We argue that existing doubly special relativities may not be operationally distinguishable from the special relativity. In the process we point out that some of the phenomenologically motivated modifications of dispersion relations, and arrived conclusions, must be reconsidered. Finally, we reflect on the possible con... |
1511.06083 | Kazufumi Takahashi | Kazufumi Takahashi, Teruaki Suyama, Tsutomu Kobayashi | Universal instability of hairy black holes in Lovelock-Galileon theories
in D dimensions | 14 pages; matches published version | Phys. Rev. D 93, 064068 (2016) | 10.1103/PhysRevD.93.064068 | RESCEU-32/15, RUP-15-27 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze spherically symmetric black hole solutions with time-dependent
scalar hair in a class of Lovelock-Galileon theories, which are the
scalar-tensor theories with second-order field equations in arbitrary
dimensions. We first show that known black hole solutions in five dimensions
are always plagued by the gho... | [
{
"created": "Thu, 19 Nov 2015 07:46:54 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Mar 2016 02:03:08 GMT",
"version": "v2"
}
] | 2016-04-06 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Suyama",
"Teruaki",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | We analyze spherically symmetric black hole solutions with time-dependent scalar hair in a class of Lovelock-Galileon theories, which are the scalar-tensor theories with second-order field equations in arbitrary dimensions. We first show that known black hole solutions in five dimensions are always plagued by the ghost... |
1606.09186 | Andrea Dapor | Mehdi Assanioussi, Andrea Dapor | Rainbow metric from quantum gravity: anisotropic cosmology | 14 pages, 1 figure | Phys. Rev. D 95, 063513 (2017) | 10.1103/PhysRevD.95.063513 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a construction of effective cosmological models
which describe the propagation of a massive quantum scalar field on a quantum
anisotropic cosmological spacetime. Each obtained effective model is
represented by a rainbow metric in which particles of distinct momenta
propagate on different clas... | [
{
"created": "Wed, 29 Jun 2016 17:08:13 GMT",
"version": "v1"
}
] | 2017-03-21 | [
[
"Assanioussi",
"Mehdi",
""
],
[
"Dapor",
"Andrea",
""
]
] | In this paper we present a construction of effective cosmological models which describe the propagation of a massive quantum scalar field on a quantum anisotropic cosmological spacetime. Each obtained effective model is represented by a rainbow metric in which particles of distinct momenta propagate on different classi... |
1105.0988 | Naresh Dadhich | Naresh Dadhich | Universal features of gravity and higher dimensions | 7 pages, revtex, Plenary lecture in 13th Regional Conference on
Mathematical Physics held on Oct. 23-31, 2010 at Antalaya, Turkey, To appear
in Proceedings of the Conference | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some universal features of gravity in higher dimensions and by
universal we mean a feature that remains true in all dimensions $\geq4$. They
include: (a) the gravitational dynamics always follows from the Bianchi
derivative of a homogeneous polynomial in Riemann curvature and it thereby
characterizes the Lov... | [
{
"created": "Thu, 5 May 2011 06:30:35 GMT",
"version": "v1"
}
] | 2011-05-06 | [
[
"Dadhich",
"Naresh",
""
]
] | We study some universal features of gravity in higher dimensions and by universal we mean a feature that remains true in all dimensions $\geq4$. They include: (a) the gravitational dynamics always follows from the Bianchi derivative of a homogeneous polynomial in Riemann curvature and it thereby characterizes the Lovel... |
gr-qc/0505149 | Ilya Mandel | Ilya Mandel | The geometry of a naked singularity created by standing waves near a
Schwarzschild horizon, and its application to the binary black hole problem | 12 pages, 6 figures | Phys.Rev. D72 (2005) 084025 | 10.1103/PhysRevD.72.084025 | null | gr-qc | null | The most promising way to compute the gravitational waves emitted by binary
black holes (BBHs) in their last dozen orbits, where post-Newtonian techniques
fail, is a quasistationary approximation introduced by Detweiler and being
pursued by Price and others. In this approximation the outgoing gravitational
waves at i... | [
{
"created": "Mon, 30 May 2005 06:52:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mandel",
"Ilya",
""
]
] | The most promising way to compute the gravitational waves emitted by binary black holes (BBHs) in their last dozen orbits, where post-Newtonian techniques fail, is a quasistationary approximation introduced by Detweiler and being pursued by Price and others. In this approximation the outgoing gravitational waves at inf... |
2401.02448 | Archie Cable | Archie Cable | A second-order stochastic effective theory for the long-distance
behaviour of scalar fields in de Sitter spacetime | PhD Thesis | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis introduces an effective theory for the long-distance behaviour of
scalar fields in de Sitter spacetime, known as the second-order stochastic
theory, with the aim of computing scalar correlation functions that are useful
in inflationary cosmology.
| [
{
"created": "Wed, 3 Jan 2024 11:30:51 GMT",
"version": "v1"
}
] | 2024-01-08 | [
[
"Cable",
"Archie",
""
]
] | This thesis introduces an effective theory for the long-distance behaviour of scalar fields in de Sitter spacetime, known as the second-order stochastic theory, with the aim of computing scalar correlation functions that are useful in inflationary cosmology. |
2107.05111 | Oleksandr Stashko | O. S. Stashko, V. I. Zhdanov, A. N. Alexandrov | Thin accretion discs around spherically symmetric configurations with
nonlinear scalar fields | null | Phys. Rev. D 104, 104055 (2021) | 10.1103/PhysRevD.104.104055 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study stable circular orbits (SCO) around static spherically symmetric
configuration of General Relativity with a non-linear scalar field (SF). The
configurations are described by solutions of the Einstein-SF equations with
monomial SF potential $V(\phi)=|\phi|^{2n}$, $n>2$, under the conditions of the
asymptotic ... | [
{
"created": "Sun, 11 Jul 2021 18:52:34 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Stashko",
"O. S.",
""
],
[
"Zhdanov",
"V. I.",
""
],
[
"Alexandrov",
"A. N.",
""
]
] | We study stable circular orbits (SCO) around static spherically symmetric configuration of General Relativity with a non-linear scalar field (SF). The configurations are described by solutions of the Einstein-SF equations with monomial SF potential $V(\phi)=|\phi|^{2n}$, $n>2$, under the conditions of the asymptotic fl... |
2207.01273 | Alfredo Bautista | A. Bautista, A. Ibort, J. Lafuente, R. Low | A conformal boundary for space-times based on light-like geodesics: the
3-dimensional case | 28 pages, 5 figures | Journal of Mathematical Physics, 58, 022503 (2017) | 10.1063/1.4976506 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new causal boundary, which we will term the $l$-boundary, inspired by the
geometry of the space of light rays and invariant by conformal diffeomorphisms
for space-times of any dimension $m\geq 3$, proposed by one of the authors
(R.J. Low, The space of null geodesics (and a new causal boundary), Lecture
Notes in Phy... | [
{
"created": "Mon, 4 Jul 2022 09:06:23 GMT",
"version": "v1"
}
] | 2022-07-05 | [
[
"Bautista",
"A.",
""
],
[
"Ibort",
"A.",
""
],
[
"Lafuente",
"J.",
""
],
[
"Low",
"R.",
""
]
] | A new causal boundary, which we will term the $l$-boundary, inspired by the geometry of the space of light rays and invariant by conformal diffeomorphisms for space-times of any dimension $m\geq 3$, proposed by one of the authors (R.J. Low, The space of null geodesics (and a new causal boundary), Lecture Notes in Physi... |
gr-qc/9303023 | null | Luca Amendola, Diego Bellisai and Franco Occhionero, Rome Astronomical
Observatory | Inflationary Attractors and Perturbation Spectra in Generally Coupled
Gravity | to appear in Phys. Rev. D, 10 pages, 4 figures available (also by
fax), LATEX, OAR 93/4 | Phys.Rev. D47 (1993) 4267-4272 | 10.1103/PhysRevD.47.4267 | null | gr-qc astro-ph | null | A generic outcome of theories with scalar-tensor coupling is the existence of
inflationary attractors, either power-law or de Sitter. The fluctuations
arising during this phase are Gaussian and their spectrum depends on the
wavenumber $k$ according to the power-law $k^{1/(1-p)}$, where $p$ is the
inflationary power-l... | [
{
"created": "Fri, 19 Mar 1993 15:01:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Amendola",
"Luca",
""
],
[
"Bellisai",
"Diego",
""
],
[
"Occhionero",
"Franco",
""
],
[
"Observatory",
"Rome Astronomical",
""
]
] | A generic outcome of theories with scalar-tensor coupling is the existence of inflationary attractors, either power-law or de Sitter. The fluctuations arising during this phase are Gaussian and their spectrum depends on the wavenumber $k$ according to the power-law $k^{1/(1-p)}$, where $p$ is the inflationary power-law... |
1809.07448 | Yisong Yang Professor | Chenmei Xu, Yisong Yang | Determination of Bending Angle of Light Deflection Subject to Possible
Weak and Strong Quantum Gravity Effects | 18 pages. Modification and improvement are made to the previous
version. Title is modified. To appear | International Journal of Modern Physics A 35 (2020) 2050188 | 10.1142/S0217751X20501882 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Explicit expressions for the bending angle of light deflection arising from
phenomenologically deformed black-hole metrics, subject to possible weak and
strong quantum gravity effects, respectively, are obtained, by a highly
effective method. The accuracy and effectiveness of these expressions are then
illustrated by... | [
{
"created": "Thu, 20 Sep 2018 01:59:26 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Sep 2018 18:15:54 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Feb 2019 03:46:20 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Oct 2020 16:15:17 GMT",
"version": "v4"
}
] | 2021-01-13 | [
[
"Xu",
"Chenmei",
""
],
[
"Yang",
"Yisong",
""
]
] | Explicit expressions for the bending angle of light deflection arising from phenomenologically deformed black-hole metrics, subject to possible weak and strong quantum gravity effects, respectively, are obtained, by a highly effective method. The accuracy and effectiveness of these expressions are then illustrated by n... |
2307.13040 | Sara Fernandez Uria | Martin Bojowald, David Brizuela, Paula Calizaya Cabrera and Sara F.
Uria | Reduction of primordial chaos by generic quantum effects | 11 pages, 2 figures, accepted for publication as a letter in Physical
Review D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to general relativity, the generic early-universe dynamics is
chaotic. Various quantum-gravity effects have been suggested that may change
this behavior in different ways. Here, it is shown how key mathematical
properties of the classical dynamics can be extended to evolving quantum states
using quasiclassi... | [
{
"created": "Mon, 24 Jul 2023 18:00:07 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Bojowald",
"Martin",
""
],
[
"Brizuela",
"David",
""
],
[
"Cabrera",
"Paula Calizaya",
""
],
[
"Uria",
"Sara F.",
""
]
] | According to general relativity, the generic early-universe dynamics is chaotic. Various quantum-gravity effects have been suggested that may change this behavior in different ways. Here, it is shown how key mathematical properties of the classical dynamics can be extended to evolving quantum states using quasiclassica... |
2208.07230 | Bruce Allen | Bruce Allen and Joseph D. Romano | Hellings and Downs correlation of an arbitrary set of pulsars | Final published version. Note that the arXiv version of the Abstract
has been shortened to fit arXiv requirements | Phys. Rev. D 108, 043026 (2023) | 10.1103/PhysRevD.108.043026 | null | gr-qc astro-ph.CO astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Pulsar timing arrays (PTAs) detect gravitational waves (GWs) via the
correlations they induce in the arrival times of pulses from different pulsars.
We assume that the GWs are described by a Gaussian ensemble. The mean
correlation $h^2 \mu_{\rm u}(\gamma)$ as a function of the angle $\gamma$
between the directions to... | [
{
"created": "Mon, 15 Aug 2022 14:40:29 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Nov 2022 18:06:07 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Nov 2022 17:39:49 GMT",
"version": "v3"
},
{
"created": "Wed, 5 Apr 2023 16:39:37 GMT",
"version": "v4"
},
{
"cre... | 2023-08-25 | [
[
"Allen",
"Bruce",
""
],
[
"Romano",
"Joseph D.",
""
]
] | Pulsar timing arrays (PTAs) detect gravitational waves (GWs) via the correlations they induce in the arrival times of pulses from different pulsars. We assume that the GWs are described by a Gaussian ensemble. The mean correlation $h^2 \mu_{\rm u}(\gamma)$ as a function of the angle $\gamma$ between the directions to t... |
gr-qc/9811058 | David Coule | D.H. Coule | Varying c cosmology and Planck value constraints | extended version | Mod.Phys.Lett. A14 (1999) 2437-2446 | 10.1142/S0217732399002534 | null | gr-qc | null | It has been suggested that by increasing the speed of light during the early
universe various cosmological problems of standard big bang cosmology can be
overcome, without requiring an inflationary phase. However, we find that as the
Planck length and Planck time are then made correspondingly smaller, and
together wi... | [
{
"created": "Tue, 17 Nov 1998 15:53:36 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jun 1999 13:39:34 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Coule",
"D. H.",
""
]
] | It has been suggested that by increasing the speed of light during the early universe various cosmological problems of standard big bang cosmology can be overcome, without requiring an inflationary phase. However, we find that as the Planck length and Planck time are then made correspondingly smaller, and together with... |
1507.00251 | Thuan Vo Van | Vo Van Thuan | From Microscopic Gravitational Waves to the Quantum Indeterminism | 7 pages, vhepu14 text-form | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on an extended space-time symmetry a new attempt to search for links
between general relativity and quantum mechanics is proposed. A simplified
cylindrical model of gravitational geometrical dynamics leads to a microscopic
geodesic description of strongly curved extradimensional space-time which
implies a duali... | [
{
"created": "Tue, 30 Jun 2015 03:40:26 GMT",
"version": "v1"
}
] | 2015-07-02 | [
[
"Van Thuan",
"Vo",
""
]
] | Based on an extended space-time symmetry a new attempt to search for links between general relativity and quantum mechanics is proposed. A simplified cylindrical model of gravitational geometrical dynamics leads to a microscopic geodesic description of strongly curved extradimensional space-time which implies a duality... |
1607.05251 | Michael Holst | Michael Holst, Olivier Sarbach, Manuel Tiglio, Michele Vallisneri | The Emergence of Gravitational Wave Science: 100 Years of Development of
Mathematical Theory, Detectors, Numerical Algorithms, and Data Analysis Tools | 41 pages, 5 figures. To appear in Bulletin of the American
Mathematical Society | null | null | null | gr-qc physics.comp-ph physics.data-an physics.hist-ph physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On September 14, 2015, the newly upgraded Laser Interferometer
Gravitational-wave Observatory (LIGO) recorded a loud gravitational-wave (GW)
signal, emitted a billion light-years away by a coalescing binary of two
stellar-mass black holes. The detection was announced in February 2016, in time
for the hundredth annive... | [
{
"created": "Mon, 18 Jul 2016 19:39:23 GMT",
"version": "v1"
}
] | 2016-07-19 | [
[
"Holst",
"Michael",
""
],
[
"Sarbach",
"Olivier",
""
],
[
"Tiglio",
"Manuel",
""
],
[
"Vallisneri",
"Michele",
""
]
] | On September 14, 2015, the newly upgraded Laser Interferometer Gravitational-wave Observatory (LIGO) recorded a loud gravitational-wave (GW) signal, emitted a billion light-years away by a coalescing binary of two stellar-mass black holes. The detection was announced in February 2016, in time for the hundredth annivers... |
1312.5976 | Claus Kiefer | Mariam Bouhmadi-Lopez, Claus Kiefer, Manuel Kraemer | Resolution of type IV singularities in quantum cosmology | 10 pages, 4 figures, clarifications included | Phys. Rev. D 89, 064016 (2014) | 10.1103/PhysRevD.89.064016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the fate of classical type IV singularities in quantum cosmology.
The framework is Wheeler-DeWitt quantization applied to homogeneous and
isotropic universes with a perfect fluid described by a generalized Chaplygin
gas. Such a fluid can be dynamically realized by a scalar field. We treat the
cases of a st... | [
{
"created": "Fri, 20 Dec 2013 15:00:16 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Feb 2014 15:40:42 GMT",
"version": "v2"
}
] | 2014-03-12 | [
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Kraemer",
"Manuel",
""
]
] | We discuss the fate of classical type IV singularities in quantum cosmology. The framework is Wheeler-DeWitt quantization applied to homogeneous and isotropic universes with a perfect fluid described by a generalized Chaplygin gas. Such a fluid can be dynamically realized by a scalar field. We treat the cases of a stan... |
1109.4119 | Philip D. Mannheim | Philip D. Mannheim | Cosmological Perturbations in Conformal Gravity | 43 pages. Final version. To appear in Phys. Rev. D | null | 10.1103/PhysRevD.85.124008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first steps needed for an analysis of the perturbations that
occur in the cosmology associated with the conformal gravity theory. We discuss
the implications of conformal invariance for perturbative coordinate gauge
choices, and show that in the conformal theory the trace of the metric
fluctuation kine... | [
{
"created": "Mon, 19 Sep 2011 18:37:29 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2012 17:54:06 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Mannheim",
"Philip D.",
""
]
] | We present the first steps needed for an analysis of the perturbations that occur in the cosmology associated with the conformal gravity theory. We discuss the implications of conformal invariance for perturbative coordinate gauge choices, and show that in the conformal theory the trace of the metric fluctuation kinema... |
0805.4399 | Davide Batic | Davide Batic and Manuel Sandoval | The hypergeneralized Heun equation in QFT in curved space-times | 8 pages | null | 10.2478/s11534-009-0107-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we show for the first time the role played by the
hypergeneralized Heun equation (HHE) in the context of Quantum Field Theory in
curved space-times. More precisely, we find suitable transformations relating
the separated radial and angular parts of a massive Dirac equation in the
Kerr-Newman-deSitter ... | [
{
"created": "Wed, 28 May 2008 18:36:50 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Batic",
"Davide",
""
],
[
"Sandoval",
"Manuel",
""
]
] | In this article we show for the first time the role played by the hypergeneralized Heun equation (HHE) in the context of Quantum Field Theory in curved space-times. More precisely, we find suitable transformations relating the separated radial and angular parts of a massive Dirac equation in the Kerr-Newman-deSitter me... |
2405.03736 | Ajit Mohan Srivastava | Ajit M. Srivastava | Percolating Cosmic String loops from evaporating primordial black holes | 8 pages. arXiv admin note: substantial text overlap with
arXiv:hep-ph/0611253 | Phys. Lett. B Volume 853, June 2024, 138683 | 10.1016/j.physletb.2024.138683 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The Pulsar timing data from NANOGrav Collaboration has regenerated interest
in the possibility of observing stochastic gravitational wave background
arising from cosmic strings. In the standard theory, the cosmic string network
forms during spontaneous symmetry breaking (SSB) phase transition in the whole
universe vi... | [
{
"created": "Mon, 6 May 2024 15:53:27 GMT",
"version": "v1"
}
] | 2024-05-08 | [
[
"Srivastava",
"Ajit M.",
""
]
] | The Pulsar timing data from NANOGrav Collaboration has regenerated interest in the possibility of observing stochastic gravitational wave background arising from cosmic strings. In the standard theory, the cosmic string network forms during spontaneous symmetry breaking (SSB) phase transition in the whole universe via ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.