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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1904.13220 | Claus Kiefer | Claus Kiefer and Tim Schmitz | Singularity avoidance for collapsing quantum dust in the
Lemaitre-Tolman-Bondi model | 20 pages, 2 figures | Phys. Rev. D 99, 126010 (2019) | 10.1103/PhysRevD.99.126010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the fate of the classical singularity in a collapsing dust
cloud. For this purpose, we quantize the marginally bound Lemaitre-Tolman-Bondi
model for spherically-symmetric dust collapse by considering each dust shell in
the cloud individually, taking the outermost shell as a representative. Because
the ... | [
{
"created": "Tue, 30 Apr 2019 13:30:48 GMT",
"version": "v1"
}
] | 2019-06-19 | [
[
"Kiefer",
"Claus",
""
],
[
"Schmitz",
"Tim",
""
]
] | We investigate the fate of the classical singularity in a collapsing dust cloud. For this purpose, we quantize the marginally bound Lemaitre-Tolman-Bondi model for spherically-symmetric dust collapse by considering each dust shell in the cloud individually, taking the outermost shell as a representative. Because the du... |
1912.08668 | Hongguang Liu | Muxin Han, Hongguang Liu | Improved ($\bar{\mu}$-Scheme) Effective Dynamics of Full Loop Quantum
Gravity | 16+4 pages, 1 figure | Phys. Rev. D 102, 064061 (2020) | 10.1103/PhysRevD.102.064061 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new derivation from the full Loop Quantum Gravity (LQG) to the
Loop Quantum Cosmology (LQC) improved $\bar{\mu}$-scheme effective dynamics,
based on the reduced phase space formulation of LQG and a proposal of effective
Hamiltonian/action in the full LQG. A key step of our program is an improved
regulari... | [
{
"created": "Wed, 18 Dec 2019 15:36:13 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Dec 2019 03:39:11 GMT",
"version": "v2"
}
] | 2020-09-30 | [
[
"Han",
"Muxin",
""
],
[
"Liu",
"Hongguang",
""
]
] | We propose a new derivation from the full Loop Quantum Gravity (LQG) to the Loop Quantum Cosmology (LQC) improved $\bar{\mu}$-scheme effective dynamics, based on the reduced phase space formulation of LQG and a proposal of effective Hamiltonian/action in the full LQG. A key step of our program is an improved regulariza... |
1905.08734 | Nicolas Yunes | Andrea Addazi, Antonino Marciano, and Nicolas Yunes | Gravitational Instability of Exotic Compact Objects | 4 pages, no figures | null | 10.1140/epjc/s10052-019-7575-9 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exotic compact objects with physical surfaces a Planckian distance away from
where the horizon would have been are inspired in quantum gravity. Most of
these objects are defined by a classical spacetime metric, such as boson stars,
gravastars and wormholes. We show that these classical objects are
gravitationally uns... | [
{
"created": "Tue, 21 May 2019 16:25:10 GMT",
"version": "v1"
}
] | 2020-02-19 | [
[
"Addazi",
"Andrea",
""
],
[
"Marciano",
"Antonino",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Exotic compact objects with physical surfaces a Planckian distance away from where the horizon would have been are inspired in quantum gravity. Most of these objects are defined by a classical spacetime metric, such as boson stars, gravastars and wormholes. We show that these classical objects are gravitationally unsta... |
1005.2266 | Ryuichi Fujita | Ryuichi Fujita and Bala R. Iyer | Spherical harmonic modes of 5.5 post-Newtonian gravitational wave
polarizations and associated factorized resummed waveforms for a particle in
circular orbit around a Schwarzschild black hol | 42 pages, 2 figures, match with accepted version by PRD | Phys.Rev.D82:044051,2010 | 10.1103/PhysRevD.82.044051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent breakthroughs in numerical relativity enable one to examine the
validity of the post-Newtonian expansion in the late stages of inspiral. For
the comparison between post-Newtonian (PN) expansion and numerical simulations,
the waveforms in terms of the spin-weighted spherical harmonics are more useful
than the p... | [
{
"created": "Thu, 13 May 2010 08:00:18 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jun 2010 06:09:07 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Sep 2010 11:30:12 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Fujita",
"Ryuichi",
""
],
[
"Iyer",
"Bala R.",
""
]
] | Recent breakthroughs in numerical relativity enable one to examine the validity of the post-Newtonian expansion in the late stages of inspiral. For the comparison between post-Newtonian (PN) expansion and numerical simulations, the waveforms in terms of the spin-weighted spherical harmonics are more useful than the plu... |
1902.04941 | Adrien Kuntz | Adrien Kuntz, Federico Piazza and Filippo Vernizzi | Effective field theory for gravitational radiation in scalar-tensor
gravity | 43 pages, 11 figures | null | 10.1088/1475-7516/2019/05/052 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A light scalar degree of freedom, as the one possibly responsible for the
accelerated expansion of the Universe, could leave observable traces in the
inspiral gravitational wave signal of binary systems. In order to study these
effects, we extend the effective field theory formalism of Goldberger and
Rothstein to min... | [
{
"created": "Wed, 13 Feb 2019 14:56:57 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2019 14:31:55 GMT",
"version": "v2"
}
] | 2019-06-26 | [
[
"Kuntz",
"Adrien",
""
],
[
"Piazza",
"Federico",
""
],
[
"Vernizzi",
"Filippo",
""
]
] | A light scalar degree of freedom, as the one possibly responsible for the accelerated expansion of the Universe, could leave observable traces in the inspiral gravitational wave signal of binary systems. In order to study these effects, we extend the effective field theory formalism of Goldberger and Rothstein to minim... |
1611.02943 | Emil Nissimov | Amar Maheshwari, Emil Nissimov, Ivan Todorov | Classical and Quantum Two-Body Problem in General Relativity | The republication of this 35-year-old paper in the electronic archive
has been stimulated by the increased interest in binary (coalescing) black
holes as a source of gravitational waves and by its close relation to the now
popular "effective one body approach" to the general relativistic two-body
problem, v.2 t... | Letters in Mathematical Physics 5 (1981) 359-366 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two-body problem in general relativity is reduced to the problem of an
effective particle (with an energy-dependent relativistic reduced mass) in an
external field. The effective potential is evaluated from the Born diagram of
the linearized quantum theory of gravity. It reduces to a Schwarzschild-like
potential ... | [
{
"created": "Wed, 9 Nov 2016 14:23:44 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Mar 2019 23:14:04 GMT",
"version": "v2"
}
] | 2019-03-26 | [
[
"Maheshwari",
"Amar",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Todorov",
"Ivan",
""
]
] | The two-body problem in general relativity is reduced to the problem of an effective particle (with an energy-dependent relativistic reduced mass) in an external field. The effective potential is evaluated from the Born diagram of the linearized quantum theory of gravity. It reduces to a Schwarzschild-like potential wi... |
1406.7400 | Nirmalya Kajuri | Nirmalya Kajuri | Path Integral representation for Polymer Quantized Scalar Fields | In this version, the derivation of the path integral is presented
starting from the position basis instead of the momentum basis to better
highlight the similarities with particle on a circle | International Journal of Modern Physics A Vol. 30 (2015) 1550204 | 10.1142/S0217751X15502048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to loop quantum gravity, matter fields must be quantized in a
background independent manner. For scalar fields, such a background independent
quantization is called polymer quantization and is inequivalent to the standard
Schrodinger quantization. It is therefore important to obtain predictions from
the pol... | [
{
"created": "Sat, 28 Jun 2014 13:36:29 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jul 2014 21:07:13 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Sep 2015 14:54:02 GMT",
"version": "v3"
}
] | 2015-12-16 | [
[
"Kajuri",
"Nirmalya",
""
]
] | According to loop quantum gravity, matter fields must be quantized in a background independent manner. For scalar fields, such a background independent quantization is called polymer quantization and is inequivalent to the standard Schrodinger quantization. It is therefore important to obtain predictions from the polym... |
1710.04487 | Andrea Giugno | Andrea Giugno | Quantum post-Newtonian theory for corpuscular Black Holes | 6 pages, no figures, talk presented at the 3rd Karl Schwarzschild
Meeting (2017) | null | 10.1088/1742-6596/942/1/012012 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss an effective theory for the quantum static gravitational potential
in spherical symmetry up to the first post-Newtonian correction. We build a
suitable Lagrangian from the weak field limit of the Einstein-Hilbert action
coupled to pressureless matter. Classical solutions of the field equation lead
to the c... | [
{
"created": "Thu, 12 Oct 2017 13:01:51 GMT",
"version": "v1"
}
] | 2018-01-17 | [
[
"Giugno",
"Andrea",
""
]
] | We discuss an effective theory for the quantum static gravitational potential in spherical symmetry up to the first post-Newtonian correction. We build a suitable Lagrangian from the weak field limit of the Einstein-Hilbert action coupled to pressureless matter. Classical solutions of the field equation lead to the cor... |
gr-qc/9809052 | Alex Kaganovich | E.I.Guendelman and A.B.Kaganovich | Field Theory Models without the Cosmological Constant Problem | Plenary talk given by E.I.Guendelman in the Fourth Alexander
Friedmann International Seminar on Gravitation and Cosmology, St. Petersburg,
1998; 25 pages. LaTeX | null | null | null | gr-qc hep-th | null | We study field theory models in the context of a gravitational theory based
on the requirement that the measure of integration in the action is not
necessarily \sqrt{-g} but it is determined dynamically through additional
degrees of freedom, like four scalar fields \phi_{a}. We study three
possibilities for the gener... | [
{
"created": "Thu, 17 Sep 1998 11:15:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Guendelman",
"E. I.",
""
],
[
"Kaganovich",
"A. B.",
""
]
] | We study field theory models in the context of a gravitational theory based on the requirement that the measure of integration in the action is not necessarily \sqrt{-g} but it is determined dynamically through additional degrees of freedom, like four scalar fields \phi_{a}. We study three possibilities for the general... |
gr-qc/9703090 | Roberto De Pietri | Roumen Borissov, Roberto De Pietri and Carlo Rovelli | Matrix Elements of Thiemann's Hamiltonian Constraint in Loop Quantum
Gravity | 32 pages, 22 eps figures. LaTeX (Using epsfig.sty,ioplppt.sty and
bezier.sty). Submited to Classical and Quantum Gravity | Class.Quant.Grav.14:2793-2823,1997 | 10.1088/0264-9381/14/10/008 | CGPG-97/4-3 and U.Parma UPRF-97-04 | gr-qc | null | We present an explicit computation of matrix elements of the hamiltonian
constraint operator in non-perturbative quantum gravity. In particular, we
consider the euclidean term of Thiemann's version of the constraint and compute
its action on trivalent states, for all its natural orderings. The calculation
is performe... | [
{
"created": "Mon, 31 Mar 1997 19:18:40 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Borissov",
"Roumen",
""
],
[
"De Pietri",
"Roberto",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We present an explicit computation of matrix elements of the hamiltonian constraint operator in non-perturbative quantum gravity. In particular, we consider the euclidean term of Thiemann's version of the constraint and compute its action on trivalent states, for all its natural orderings. The calculation is performed ... |
1906.02346 | Andr\'es Ace\~na | Mar\'ia E. Gabach-Cl\'ement and Andr\'es Ace\~na | Sobolev spaces for multi-black hole initial data | 13 pages, no figures | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we introduce weighted Sobolev spaces that are well suited to
treat initial data for multiple black hole systems. We prove general results
for elliptic operators on these spaces and give a simple proof of existence of
a class of initial data describing many extremal black holes.
| [
{
"created": "Wed, 5 Jun 2019 22:42:59 GMT",
"version": "v1"
}
] | 2019-06-07 | [
[
"Gabach-Clément",
"María E.",
""
],
[
"Aceña",
"Andrés",
""
]
] | In this article we introduce weighted Sobolev spaces that are well suited to treat initial data for multiple black hole systems. We prove general results for elliptic operators on these spaces and give a simple proof of existence of a class of initial data describing many extremal black holes. |
1307.3044 | Martin \v{C}erm\'ak | Martin \v{C}erm\'ak | Electrovacuum cylindrical stationary solutions in general relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a systematical study of stationary (rotating) cylindrical
space-times of a Weyl form that are solutions to D=4 Einstein-Maxwell equations
with cosmological constant. The corresponding equations of motion - with zero
cosmological constant - are integrated. Then, several classes of exact
solutions -... | [
{
"created": "Thu, 11 Jul 2013 10:11:06 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Aug 2013 08:39:43 GMT",
"version": "v2"
}
] | 2013-08-14 | [
[
"Čermák",
"Martin",
""
]
] | This paper presents a systematical study of stationary (rotating) cylindrical space-times of a Weyl form that are solutions to D=4 Einstein-Maxwell equations with cosmological constant. The corresponding equations of motion - with zero cosmological constant - are integrated. Then, several classes of exact solutions - o... |
2004.00724 | Tales Rick Perche | R\'emi Faure, T. Rick Perche, Bruno de S.L. Torres | Particle detectors as witnesses for quantum gravity | 8 pages, 1 figure | Phys. Rev. D 101, 125018 (2020) | 10.1103/PhysRevD.101.125018 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a model for the coupling of non-relativistic quantum systems with
a linearized gravitational field from a Lagrangian formulation. The coupling
strongly resembles the light-matter interaction models that are known to be
well approximated by the Unruh-DeWitt detector model for interactions with
quantum field... | [
{
"created": "Wed, 1 Apr 2020 22:30:24 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2020 18:59:16 GMT",
"version": "v2"
}
] | 2020-06-30 | [
[
"Faure",
"Rémi",
""
],
[
"Perche",
"T. Rick",
""
],
[
"Torres",
"Bruno de S. L.",
""
]
] | We present a model for the coupling of non-relativistic quantum systems with a linearized gravitational field from a Lagrangian formulation. The coupling strongly resembles the light-matter interaction models that are known to be well approximated by the Unruh-DeWitt detector model for interactions with quantum fields.... |
gr-qc/9703040 | Max | Maximo Banados | Constant Curvature Black Holes | New references added and some improvements in the presentation
introduced, 5 pages, 2 eps figures, REVTeX | Phys.Rev. D57 (1998) 1068-1072 | 10.1103/PhysRevD.57.1068 | null | gr-qc hep-th | null | Constant curvature black holes are constructed by identifying points in
anti-de Sitter space. In n dimensions, the resulting topology is R^{n-1} * S_1,
as opposed to the usual R^2 * S_{n-2} Schwarzschild black hole, and the
corresponding causal structure is displayed by a (n-1)-dimensional picture, as
opposed to the ... | [
{
"created": "Sun, 16 Mar 1997 21:34:13 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jul 1997 00:49:55 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Banados",
"Maximo",
""
]
] | Constant curvature black holes are constructed by identifying points in anti-de Sitter space. In n dimensions, the resulting topology is R^{n-1} * S_1, as opposed to the usual R^2 * S_{n-2} Schwarzschild black hole, and the corresponding causal structure is displayed by a (n-1)-dimensional picture, as opposed to the us... |
1501.02198 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Ninfa Radicella | Weak-Field Spherically Symmetric Solutions in $f(T)$ gravity | 11 pages, LaTeX; revised to match the version accepted for
publication in Physical Review D | Phys. Rev. D 91, 104014 (2015) | 10.1103/PhysRevD.91.104014 | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study weak-field solutions having spherical symmetry in $f(T)$ gravity; to
this end, we solve the field equations for a non diagonal tetrad, starting from
Lagrangian in the form $f(T)=T+\alpha T^{n}$, where $\alpha$ is a small
constant, parameterizing the departure of the theory from GR. We show that the
classical... | [
{
"created": "Fri, 9 Jan 2015 16:48:49 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Apr 2015 17:44:56 GMT",
"version": "v2"
}
] | 2015-05-25 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Radicella",
"Ninfa",
""
]
] | We study weak-field solutions having spherical symmetry in $f(T)$ gravity; to this end, we solve the field equations for a non diagonal tetrad, starting from Lagrangian in the form $f(T)=T+\alpha T^{n}$, where $\alpha$ is a small constant, parameterizing the departure of the theory from GR. We show that the classical s... |
1209.2572 | Wagner Utiel | Wagner Utiel | Vacuum fluctuation in a 4D spacetime due an evolving non-compact
extra-dimension | A new version will be uploaded (problems with some figures in the
submission process) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The regime of exponentially fast expansion in 5D cosmological models was
investigated. Many limit cases was also studied. It was shown that there is a
possibility to particle creation in a static 4D spacetime if it embedded in an
bulk with an expanding extra-dimension y. It was also shown that many physical
quantitie... | [
{
"created": "Wed, 12 Sep 2012 11:33:44 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2012 18:12:57 GMT",
"version": "v2"
}
] | 2012-11-14 | [
[
"Utiel",
"Wagner",
""
]
] | The regime of exponentially fast expansion in 5D cosmological models was investigated. Many limit cases was also studied. It was shown that there is a possibility to particle creation in a static 4D spacetime if it embedded in an bulk with an expanding extra-dimension y. It was also shown that many physical quantities ... |
gr-qc/9712052 | J. Frauendiener | J. Frauendiener | Numerical treatment of the hyperboloidal initial value problem for the
vacuum Einstein equations. II. The evolution equations | 30 pages, 13 figures, LaTeX2e | Phys. Rev. D 58, 064003 (1998) | 10.1103/PhysRevD.58.064003 | null | gr-qc | null | This is the second in a series of articles on the numerical solution of
Friedrich's conformal field equations for Einstein's theory of gravity. We will
discuss in this paper the numerical methods used to solve the system of
evolution equations obtained from the conformal field equations. In particular
we discuss in d... | [
{
"created": "Thu, 11 Dec 1997 15:50:30 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Frauendiener",
"J.",
""
]
] | This is the second in a series of articles on the numerical solution of Friedrich's conformal field equations for Einstein's theory of gravity. We will discuss in this paper the numerical methods used to solve the system of evolution equations obtained from the conformal field equations. In particular we discuss in det... |
2204.11253 | Surya Shankar R | Surya Shankar R | Critical orbits in Schwarzschild black hole with quintessence and string
cloud background space-times | null | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, we have examined the geodesic structure of the spacetime
surrounding Schwarzschild black holes in the presence of a quintessence field
parameter $q$ and string cloud parameter $a$. Because of the quintessence
field, there are two horizon structures and coordinate time $t$ shows some
fascinating variati... | [
{
"created": "Sun, 24 Apr 2022 11:54:37 GMT",
"version": "v1"
},
{
"created": "Sat, 21 May 2022 18:46:02 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Aug 2022 05:48:36 GMT",
"version": "v3"
}
] | 2022-08-30 | [
[
"R",
"Surya Shankar",
""
]
] | In this paper, we have examined the geodesic structure of the spacetime surrounding Schwarzschild black holes in the presence of a quintessence field parameter $q$ and string cloud parameter $a$. Because of the quintessence field, there are two horizon structures and coordinate time $t$ shows some fascinating variation... |
1405.2647 | Roberto Ivan Cabrera Munguia | I. Cabrera-Munguia, Alfredo Mac\'ias | On naked singularities in the extreme double Reissner-Nordstr\"{o}m
solution | 7 pages, 3 figures, contribution to the Proceedings of 5th Mexican
Meeting on Mathematical and Experimental Physics: Mexico City, Mexico,
September 9-13, 2013 | AIP Conf.Proc. 1577 (2014) 213-219 | 10.1063/1.4861957 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a quite simple analytical study on the appearance or absence of
naked singularities in binary systems. As an example we consider the double
Reissner-Nordstr\"om solution and fix the conditions it should satisfy in order
to avoid or develop singular surfaces off the axis. The proof shows that
singular surfa... | [
{
"created": "Mon, 12 May 2014 07:24:06 GMT",
"version": "v1"
}
] | 2014-05-13 | [
[
"Cabrera-Munguia",
"I.",
""
],
[
"Macías",
"Alfredo",
""
]
] | We present a quite simple analytical study on the appearance or absence of naked singularities in binary systems. As an example we consider the double Reissner-Nordstr\"om solution and fix the conditions it should satisfy in order to avoid or develop singular surfaces off the axis. The proof shows that singular surface... |
2303.14450 | Mehdi Sadeghi | Mehdi Sadeghi, Ramin Anvari Asl, Mohammad Shamseh | AdS Black Hole with Cylindrical Symmetry | 9 pages, 1 figure, to appear in INJP | Indian J Phys (2023) | 10.1007/s12648-023-02709-9 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we consider Einstein-Hilbert gravity in the presence of
cosmological constant with cylindrical symmetry to introduce the black hole
solution of this model. Here, we solve the Einstein's vacuum field equation,
and then we calculate the appropriate metric for this problem.
| [
{
"created": "Sat, 25 Mar 2023 12:08:47 GMT",
"version": "v1"
}
] | 2023-04-24 | [
[
"Sadeghi",
"Mehdi",
""
],
[
"Asl",
"Ramin Anvari",
""
],
[
"Shamseh",
"Mohammad",
""
]
] | In this paper, we consider Einstein-Hilbert gravity in the presence of cosmological constant with cylindrical symmetry to introduce the black hole solution of this model. Here, we solve the Einstein's vacuum field equation, and then we calculate the appropriate metric for this problem. |
2111.13664 | Shilpa Kastha | Shilpa Kastha, Collin D. Capano, Julian Westerweck, Miriam Cabero,
Badri Krishnan, Alex B. Nielsen | Model systematics in time domain tests of binary black hole evolution | 11 pages, 8 figures | null | 10.1103/PhysRevD.105.064042 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We perform several consistency tests between different phases of binary black
hole dynamics; the inspiral, the merger, and the ringdown on the gravitational
wave events GW150914 and GW170814. These tests are performed explicitly in the
time domain, without any spectral leakage between the different phases. We
compute... | [
{
"created": "Fri, 26 Nov 2021 18:44:29 GMT",
"version": "v1"
}
] | 2022-04-06 | [
[
"Kastha",
"Shilpa",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Westerweck",
"Julian",
""
],
[
"Cabero",
"Miriam",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Nielsen",
"Alex B.",
""
]
] | We perform several consistency tests between different phases of binary black hole dynamics; the inspiral, the merger, and the ringdown on the gravitational wave events GW150914 and GW170814. These tests are performed explicitly in the time domain, without any spectral leakage between the different phases. We compute p... |
2402.08887 | Zhen-Ming Xu | Yu-Shan Wang, Zhen-Ming Xu, and Bin Wu | Thermodynamic phase transition rate for the third-order Lovelock black
hole in diverse dimensions | v1: 11 pages, 8 figures | Phys.Lett.B 853 (2024) 138690 | 10.1016/j.physletb.2024.138690 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phase transition has always been a major focus in the study of black hole
thermodynamics. This study employs the Kramer escape rate from stochastic
processes to investigate the first-order phase transition strength between the
large and small black hole states. The results indicate that the phase
transition of th... | [
{
"created": "Wed, 14 Feb 2024 01:27:37 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Wang",
"Yu-Shan",
""
],
[
"Xu",
"Zhen-Ming",
""
],
[
"Wu",
"Bin",
""
]
] | The phase transition has always been a major focus in the study of black hole thermodynamics. This study employs the Kramer escape rate from stochastic processes to investigate the first-order phase transition strength between the large and small black hole states. The results indicate that the phase transition of the ... |
1311.1857 | Woei Chet Lim | Woei Chet Lim, Alan Coley | General relativistic density perturbations | 18 pages, 10 figures | Class. Quantum Grav. 31 (2014) 015020 | 10.1088/0264-9381/31/1/015020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a general relativistic mechanism in which spikes generate
matter overdensities in the early universe. When the cosmological fluid is
tilted, the tilt provides another mechanism in generating matter
inhomogeneities. We numerically investigate the effect of a sign change in the
tilt, when there is a spik... | [
{
"created": "Fri, 8 Nov 2013 00:53:15 GMT",
"version": "v1"
}
] | 2015-07-13 | [
[
"Lim",
"Woei Chet",
""
],
[
"Coley",
"Alan",
""
]
] | We investigate a general relativistic mechanism in which spikes generate matter overdensities in the early universe. When the cosmological fluid is tilted, the tilt provides another mechanism in generating matter inhomogeneities. We numerically investigate the effect of a sign change in the tilt, when there is a spike ... |
1501.01244 | Mar\'ia Montserrat Ju\'arez-Aubry | Eloy Ayon-Beato, Moises Bravo-Gaete, Francisco Correa, Mokhtar
Hassaine, Maria Montserrat Juarez-Aubry, Julio Oliva | First law and anisotropic Cardy formula for three-dimensional Lifshitz
black holes | null | Phys. Rev. D 91, 064006 (2015) | 10.1103/PhysRevD.91.064006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this paper is to confirm in new concrete examples that the
semiclassical entropy of a three-dimensional Lifshitz black hole can be
recovered through an anisotropic generalization of the Cardy formula derived
from the growth of the number of states of a boundary non-relativistic field
theory. The role of th... | [
{
"created": "Tue, 6 Jan 2015 17:32:33 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2015 23:11:58 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Aug 2017 21:27:24 GMT",
"version": "v3"
}
] | 2017-08-08 | [
[
"Ayon-Beato",
"Eloy",
""
],
[
"Bravo-Gaete",
"Moises",
""
],
[
"Correa",
"Francisco",
""
],
[
"Hassaine",
"Mokhtar",
""
],
[
"Juarez-Aubry",
"Maria Montserrat",
""
],
[
"Oliva",
"Julio",
""
]
] | The aim of this paper is to confirm in new concrete examples that the semiclassical entropy of a three-dimensional Lifshitz black hole can be recovered through an anisotropic generalization of the Cardy formula derived from the growth of the number of states of a boundary non-relativistic field theory. The role of the ... |
1512.06006 | B. V. Ivanov | B. V. Ivanov | All solutions for geodesic anisotropic spherical collapse with shear and
heat radiation | 23 pages. arXiv admin note: text overlap with arXiv:1512.04072 | Astrophys. Space Sci. 361 (2016) 18 | 10.1007/s10509-015-2603-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a physically important object, called the horizon function, in
the study of geodesic collapse. It is closely related to the stellar
characteristics and satisfies a simple Riccati equation. This equation is
integrated and all of its solutions are found in terms of some generating
functions. Previous solut... | [
{
"created": "Fri, 18 Dec 2015 15:59:25 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Ivanov",
"B. V.",
""
]
] | We introduce a physically important object, called the horizon function, in the study of geodesic collapse. It is closely related to the stellar characteristics and satisfies a simple Riccati equation. This equation is integrated and all of its solutions are found in terms of some generating functions. Previous solutio... |
2011.11072 | Matthew J. Lake Dr | Tiberiu Harko, Man Kwong Mak and Matthew J. Lake | Series solution of the time-dependent Schr\"{o}dinger-Newton equations
in the presence of dark energy via the Adomian Decomposition Method | Expanded version of the published work: Symmetry 2023, 15(2), 372. 20
pages, 1 table, 8 figures | Symmetry 2023, 15(2), 372 | 10.3390/sym15020372 | null | gr-qc hep-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | The Schr\"{o}dinger-Newton model is a nonlinear system obtained by coupling
the linear Schr\"{o}dinger equation of canonical quantum mechanics with the
Poisson equation of Newtonian mechanics. In this paper we investigate the
effects of dark energy on the time-dependent Schr\"{o}dinger-Newton equations
by including a... | [
{
"created": "Sun, 22 Nov 2020 17:34:12 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jul 2022 06:37:30 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Feb 2023 09:42:08 GMT",
"version": "v3"
}
] | 2023-02-09 | [
[
"Harko",
"Tiberiu",
""
],
[
"Mak",
"Man Kwong",
""
],
[
"Lake",
"Matthew J.",
""
]
] | The Schr\"{o}dinger-Newton model is a nonlinear system obtained by coupling the linear Schr\"{o}dinger equation of canonical quantum mechanics with the Poisson equation of Newtonian mechanics. In this paper we investigate the effects of dark energy on the time-dependent Schr\"{o}dinger-Newton equations by including a n... |
0709.2130 | Joan Sola | Javier Grande, Reuven Opher, Ana Pelinson, Joan Sola | Effective growth of matter density fluctuations in the running LCDM and
LXCDM models | LaTeX, 38 pages, 8 figures. Version accepted in JCAP | JCAP 0712:007,2007 | 10.1088/1475-7516/2007/12/007 | UB-ECM-PF 07/26 | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the matter density fluctuations \delta\rho/\rho for two dark
energy (DE) models in the literature in which the cosmological term \Lambda is
a running parameter. In the first model, the running LCDM model, matter and DE
exchange energy, whereas in the second model, the LXCDM model, the total DE and
matt... | [
{
"created": "Thu, 13 Sep 2007 17:11:16 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Sep 2007 16:57:19 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Apr 2009 21:06:02 GMT",
"version": "v3"
}
] | 2009-04-28 | [
[
"Grande",
"Javier",
""
],
[
"Opher",
"Reuven",
""
],
[
"Pelinson",
"Ana",
""
],
[
"Sola",
"Joan",
""
]
] | We investigate the matter density fluctuations \delta\rho/\rho for two dark energy (DE) models in the literature in which the cosmological term \Lambda is a running parameter. In the first model, the running LCDM model, matter and DE exchange energy, whereas in the second model, the LXCDM model, the total DE and matter... |
2209.06459 | Marius Adrian Oancea | Marius A. Oancea, Richard Stiskalek, Miguel Zumalac\'arregui | Frequency- and polarization-dependent lensing of gravitational waves in
strong gravitational fields | null | null | null | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of gravitational waves can be described in terms of null
geodesics by using the geometrical optics approximation. However, at large but
finite frequencies the propagation is affected by the spin-orbit coupling
corrections to geometrical optics, known as the gravitational spin Hall effect.
Consequently... | [
{
"created": "Wed, 14 Sep 2022 07:22:45 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2023 08:50:43 GMT",
"version": "v2"
},
{
"created": "Fri, 17 May 2024 08:42:14 GMT",
"version": "v3"
}
] | 2024-05-20 | [
[
"Oancea",
"Marius A.",
""
],
[
"Stiskalek",
"Richard",
""
],
[
"Zumalacárregui",
"Miguel",
""
]
] | The propagation of gravitational waves can be described in terms of null geodesics by using the geometrical optics approximation. However, at large but finite frequencies the propagation is affected by the spin-orbit coupling corrections to geometrical optics, known as the gravitational spin Hall effect. Consequently, ... |
1811.00377 | John Fredsted Mr. | John Fredsted | Spinors and gravity without Lorentz indices | 15 pages; v2: minor improvements | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coupling spinor fields to the gravitational field, in the setting of general
relativity, is standardly done via the introduction of a vierbein field and the
(associated minimal) spin connection field. This makes three types of indices
feature in the formalism: world/coordinate indices, Lorentz vector indices, and
Lor... | [
{
"created": "Mon, 29 Oct 2018 07:37:22 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2018 07:41:55 GMT",
"version": "v2"
}
] | 2018-12-03 | [
[
"Fredsted",
"John",
""
]
] | Coupling spinor fields to the gravitational field, in the setting of general relativity, is standardly done via the introduction of a vierbein field and the (associated minimal) spin connection field. This makes three types of indices feature in the formalism: world/coordinate indices, Lorentz vector indices, and Loren... |
1605.00969 | Javier Olmedo | Rodolfo Gambini, Javier Olmedo and Jorge Pullin | Schr\"odinger-like quantum dynamics in loop quantized black holes | 19 pages, minor corrections have been incorporated in order to match
the published version | International Journal of Modern Physics D, 1642006 (2016) | 10.1142/S0218271816420062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show, following a previous quantization of a vacuum spherically symmetric
spacetime carried out in Ref. \cite{gop}, that this setting admits a
Schr\"odinger-like picture. More precisely, the technique adopted there for the
definition of parametrized Dirac observables (that codify local information of
the quantum t... | [
{
"created": "Tue, 3 May 2016 16:22:44 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2016 17:16:24 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Pullin",
"Jorge",
""
]
] | We show, following a previous quantization of a vacuum spherically symmetric spacetime carried out in Ref. \cite{gop}, that this setting admits a Schr\"odinger-like picture. More precisely, the technique adopted there for the definition of parametrized Dirac observables (that codify local information of the quantum the... |
2008.13469 | Marcello Rotondo | Marcello Rotondo | The Functional Schrodinger Equation in the Semiclassical Limit of
Quantum Gravity with a Gaussian Clock Field | null | Universe 2020, 6, 176 | 10.3390/universe6100176 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the functional Schrodinger equation for quantum fields in curved
spacetime in the semiclassical limit of quantum geometrodynamics with a
Gaussian incoherent dust acting as a clock field. We perform the semiclassical
limit using a WKB-type expansion of the wave functional in powers of the
squared Planck mass... | [
{
"created": "Mon, 31 Aug 2020 10:21:19 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2020 08:32:10 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Oct 2020 10:33:08 GMT",
"version": "v3"
},
{
"created": "Sun, 18 Oct 2020 21:58:45 GMT",
"version": "v4"
}
] | 2020-10-20 | [
[
"Rotondo",
"Marcello",
""
]
] | We derive the functional Schrodinger equation for quantum fields in curved spacetime in the semiclassical limit of quantum geometrodynamics with a Gaussian incoherent dust acting as a clock field. We perform the semiclassical limit using a WKB-type expansion of the wave functional in powers of the squared Planck mass. ... |
gr-qc/9811031 | Istvan Racz | Istvan Racz | On the existence of Killing vector fields | 9 pages, no figure, to appear in Class. Quant. Grav | Class.Quant.Grav. 16 (1999) 1695-1703 | 10.1088/0264-9381/16/6/304 | null | gr-qc hep-th | null | In covariant metric theories of coupled gravity-matter systems the necessary
and sufficient conditions ensuring the existence of a Killing vector field are
investigated. It is shown that the symmetries of initial data sets are
preserved by the evolution of hyperbolic systems.
| [
{
"created": "Wed, 11 Nov 1998 08:23:06 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Mar 1999 15:40:19 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Racz",
"Istvan",
""
]
] | In covariant metric theories of coupled gravity-matter systems the necessary and sufficient conditions ensuring the existence of a Killing vector field are investigated. It is shown that the symmetries of initial data sets are preserved by the evolution of hyperbolic systems. |
2306.09069 | Baptiste Blachier | Baptiste Blachier, Aur\'elien Barrau, Killian Martineau, Cyril Renevey | Competitive effects between gravitational radiation and mass variation
for two-body systems in circular orbits | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work provides, at lower order, general analytical solutions for the
orbital separation, merging time, and orbital frequency of binary systems
emitting gravitational waves while being submitted to mass variations. Specific
features, depending on the exponent of the mass derivative, are investigated in
details. Tw... | [
{
"created": "Thu, 15 Jun 2023 11:56:40 GMT",
"version": "v1"
}
] | 2023-06-16 | [
[
"Blachier",
"Baptiste",
""
],
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
],
[
"Renevey",
"Cyril",
""
]
] | This work provides, at lower order, general analytical solutions for the orbital separation, merging time, and orbital frequency of binary systems emitting gravitational waves while being submitted to mass variations. Specific features, depending on the exponent of the mass derivative, are investigated in details. Two ... |
gr-qc/9903043 | Merced Montesinos fin juillet | M. Montesinos (CINVESTAV-IPN, Mexico), H. A. Morales-Tecotl (UAM-I,
Mexico), L. F. Urrutia (ICN-UNAM, Mexico), J.D. Vergara (ICN-UNAM, Mexico) | Real sector of the nonminimally coupled scalar field to self-dual
gravity | Latex file, 22 pages, no figures | J.Math.Phys. 40 (1999) 1504-1517 | 10.1063/1.532818 | null | gr-qc | null | A scalar field nonminimally coupled to gravity is studied in the canonical
framework, using self-dual variables. The corresponding constraints are first
class and polynomial. To identify the real sector of the theory, reality
conditions are implemented as second class constraints, leading to three real
configurationa... | [
{
"created": "Fri, 12 Mar 1999 12:24:11 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Montesinos",
"M.",
"",
"CINVESTAV-IPN, Mexico"
],
[
"Morales-Tecotl",
"H. A.",
"",
"UAM-I,\n Mexico"
],
[
"Urrutia",
"L. F.",
"",
"ICN-UNAM, Mexico"
],
[
"Vergara",
"J. D.",
"",
"ICN-UNAM, Mexico"
]
] | A scalar field nonminimally coupled to gravity is studied in the canonical framework, using self-dual variables. The corresponding constraints are first class and polynomial. To identify the real sector of the theory, reality conditions are implemented as second class constraints, leading to three real configurational ... |
2107.13255 | Puxun Wu | Di Wu, Puxun Wu and Hongwei Yu | Shadowless rapidly rotating yet not ultraspinning Kerr-AdS$_4$ and
Kerr-Newman-AdS$_4$ black holes | 5 pages, 4 figures. arXiv admin note: substantial text overlap with
arXiv:2104.10476 | null | 10.1103/PhysRevD.104.L121501 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We find that the Kerr-(Newman)-AdS$_4$ black hole will be shadowless if its
rotation parameter is larger than a critical value and the shadowless-ness may
be related to the appearance of the null hypersurface caustics (NHC) both
inside the Cauchy horizon and outside the event horizon for the black hole with
the rotat... | [
{
"created": "Wed, 28 Jul 2021 10:29:10 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2021 02:47:12 GMT",
"version": "v2"
}
] | 2021-12-22 | [
[
"Wu",
"Di",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | We find that the Kerr-(Newman)-AdS$_4$ black hole will be shadowless if its rotation parameter is larger than a critical value and the shadowless-ness may be related to the appearance of the null hypersurface caustics (NHC) both inside the Cauchy horizon and outside the event horizon for the black hole with the rotatio... |
2309.06916 | Iver Brevik | I. Brevik and A. V. Timoshkin | Holographic description of the dissipative unified dark fluid model with
axion field | 7 pages, latex 2e, to appear in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D 32, 235005 (2023) | 10.1142/S0218271823500852 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article we extend an axion F(R) gravity model, and apply the
holographic principle to describe in a unifying manner the early and the
late-time universe when the general equation of state (EoS) contains a bulk
viscosity. We assume a spatially flat Friedmann-Robertson-Walker (FRW) universe
model. We use a desc... | [
{
"created": "Wed, 13 Sep 2023 12:29:25 GMT",
"version": "v1"
}
] | 2023-11-23 | [
[
"Brevik",
"I.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | In this article we extend an axion F(R) gravity model, and apply the holographic principle to describe in a unifying manner the early and the late-time universe when the general equation of state (EoS) contains a bulk viscosity. We assume a spatially flat Friedmann-Robertson-Walker (FRW) universe model. We use a descri... |
1711.01151 | Ahmad Sheykhi | Amin Dehyadegari, Ahmad Sheykhi | Reentrant phase transition of Born-Infeld-AdS black holes | 8 pages, 6 figures, two columns | Phys. Rev. D 98, 024011 (2018) | 10.1103/PhysRevD.98.024011 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate thermodynamic phase structure and critical behaviour of
Born-Infeld (BI) black holes in an anti-de Sitter (AdS) space, where the charge
of the system can vary and the cosmological constant (pressure) is fixed. We
find that the BI parameter crucially affects the temperature of the black hole
when the ho... | [
{
"created": "Mon, 30 Oct 2017 18:27:40 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Jul 2018 16:05:35 GMT",
"version": "v2"
}
] | 2018-07-11 | [
[
"Dehyadegari",
"Amin",
""
],
[
"Sheykhi",
"Ahmad",
""
]
] | We investigate thermodynamic phase structure and critical behaviour of Born-Infeld (BI) black holes in an anti-de Sitter (AdS) space, where the charge of the system can vary and the cosmological constant (pressure) is fixed. We find that the BI parameter crucially affects the temperature of the black hole when the hori... |
1107.4987 | Marc-Thierry Jaekel | Marc-Thierry Jaekel and Serge Reynaud | Tests of gravity at the solar system scale | 8 pages, Proceedings of 46th Rencontres de Moriond | Experimental Gravity and Gravitational Waves, p.241-248 ( Th\'e
Gioi, 2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As confirmed by tests performed in the solar system, General Relativity (GR)
presently represents the best description of gravitation. It is however
challenged by observations at very large length scales, and already at the
solar system scale, tracking of the Pioneer 10/11 probes has failed to confirm
their expected ... | [
{
"created": "Mon, 25 Jul 2011 16:01:32 GMT",
"version": "v1"
}
] | 2014-09-16 | [
[
"Jaekel",
"Marc-Thierry",
""
],
[
"Reynaud",
"Serge",
""
]
] | As confirmed by tests performed in the solar system, General Relativity (GR) presently represents the best description of gravitation. It is however challenged by observations at very large length scales, and already at the solar system scale, tracking of the Pioneer 10/11 probes has failed to confirm their expected be... |
2004.13100 | Denitsa Staicova | Denitsa Staicova | The role of the slope in the the multi-measure cosmological model | 11 pages, 4 figures, Contribution to XIII-th International Workshop
"Lie Theory and Its Applications in Physics", Varna (2019); v.2 (typos in
acknowledgments fixed, doi added) | Springer Proc.Math.Stat. 335 (2019) 299-308 | 10.1007/978-981-15-7775-8_20 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we report some results on the numerical exploration of the
model of Guendelman-Nissimov-Pacheva. This model has been previously applied to
cosmology, but there were open questions regarding its parameters. Here we
demonstrate the existence of families of solutions on the slope of the
effective potential... | [
{
"created": "Mon, 27 Apr 2020 18:58:39 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Aug 2021 11:57:31 GMT",
"version": "v2"
}
] | 2021-08-20 | [
[
"Staicova",
"Denitsa",
""
]
] | In this work, we report some results on the numerical exploration of the model of Guendelman-Nissimov-Pacheva. This model has been previously applied to cosmology, but there were open questions regarding its parameters. Here we demonstrate the existence of families of solutions on the slope of the effective potential w... |
2310.18287 | Behzad Eslam Panah | H. Barzegar, B. Eslam Panah, G. H. Bordbar, and M. Bigdeli | Structure of $3D$ gravastars in the context of massive gravity | 12 pages, 7 figures | Phys. Lett. B 847 (2023) 138280 | 10.1016/j.physletb.2023.138280 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate a new model of $(2+1)-$dimensional ($3D$)
gravitational vacuum stars (gravastars) with an isotropic matter distribution
anti-de Sitter (AdS) spacetime in the context of massive gravity. For this
purpose, we explore free singularity models with a specific equation of state.
Using Mazur-Mo... | [
{
"created": "Fri, 27 Oct 2023 17:24:49 GMT",
"version": "v1"
}
] | 2023-10-30 | [
[
"Barzegar",
"H.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Bordbar",
"G. H.",
""
],
[
"Bigdeli",
"M.",
""
]
] | In this paper, we investigate a new model of $(2+1)-$dimensional ($3D$) gravitational vacuum stars (gravastars) with an isotropic matter distribution anti-de Sitter (AdS) spacetime in the context of massive gravity. For this purpose, we explore free singularity models with a specific equation of state. Using Mazur-Mott... |
2304.03803 | Supriya Pan | Raj Kumar Das, Aurindam Mondal, Subir Ghosh, Supriya Pan | Cosmology in $R^2$-gravity: Effects of a Higher Derivative Scalar
Condensate Background | 10 pages including references, 4 compound figures; published version
in JHEAp | JHEAp 43 (2024) 231-238 | 10.1016/j.jheap.2024.07.011 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | A well known extension of Einstein General Relativity is the addition of an
$R^2$-term, which is free of ghost excitations and in the linearized framework,
reduces Einstein General Relativity and an additional higher derivative scalar.
According to \cite{Chakraborty:2020ktp}, the above scalar sector can sustain a
Tim... | [
{
"created": "Fri, 7 Apr 2023 18:12:37 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2024 17:51:49 GMT",
"version": "v2"
}
] | 2024-08-09 | [
[
"Das",
"Raj Kumar",
""
],
[
"Mondal",
"Aurindam",
""
],
[
"Ghosh",
"Subir",
""
],
[
"Pan",
"Supriya",
""
]
] | A well known extension of Einstein General Relativity is the addition of an $R^2$-term, which is free of ghost excitations and in the linearized framework, reduces Einstein General Relativity and an additional higher derivative scalar. According to \cite{Chakraborty:2020ktp}, the above scalar sector can sustain a Time ... |
gr-qc/9901086 | Patricia Purdue | Patricia Purdue | The gauge invariance of general relativistic tidal heating | 8 pages, 1 figure; revised introduction, corrected typos | Phys.Rev. D60 (1999) 104054 | 10.1103/PhysRevD.60.104054 | null | gr-qc | null | When a self-gravitating body (e.g., a neutron star or black hole) interacts
with an external tidal field (e.g., that of a binary companion), the
interaction can do work on the body, changing its mass-energy. The details of
this "tidal heating" are analyzed using the Landau-Lifshitz pseudotensor and
the local asymptot... | [
{
"created": "Fri, 29 Jan 1999 19:34:46 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jun 1999 18:15:16 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Purdue",
"Patricia",
""
]
] | When a self-gravitating body (e.g., a neutron star or black hole) interacts with an external tidal field (e.g., that of a binary companion), the interaction can do work on the body, changing its mass-energy. The details of this "tidal heating" are analyzed using the Landau-Lifshitz pseudotensor and the local asymptotic... |
2102.07794 | Eliot Finch | Eliot Finch, Christopher J. Moore | Modelling the Ringdown from Precessing Black Hole Binaries | 13 pages, plus appendices, 13 figures, v3 matches published version,
see accompanying resources at https://doi.org/10.5281/zenodo.4538194 | Phys. Rev. D 103, 084048 (2021) | 10.1103/PhysRevD.103.084048 | LIGO document number P2100036-v2 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modelling the end point of binary black hole mergers is a cornerstone of
modern gravitational-wave astronomy. Extracting multiple quasinormal mode
frequencies from the ringdown signal allows the remnant black hole to be
studied in unprecedented detail. Previous studies on numerical relativity
simulations of aligned-s... | [
{
"created": "Mon, 15 Feb 2021 19:02:50 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2021 09:33:08 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2021 09:29:43 GMT",
"version": "v3"
}
] | 2021-05-11 | [
[
"Finch",
"Eliot",
""
],
[
"Moore",
"Christopher J.",
""
]
] | Modelling the end point of binary black hole mergers is a cornerstone of modern gravitational-wave astronomy. Extracting multiple quasinormal mode frequencies from the ringdown signal allows the remnant black hole to be studied in unprecedented detail. Previous studies on numerical relativity simulations of aligned-spi... |
1007.1437 | Arundhati Dasgupta | Arundhati Dasgupta | Time Evolution of Horizons | 19 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A density matrix is defined using coherent states for space-times with
apparent horizons. Evolving the density matrix in time gives the origin of
Hawking radiation.
| [
{
"created": "Thu, 8 Jul 2010 18:37:41 GMT",
"version": "v1"
}
] | 2010-07-09 | [
[
"Dasgupta",
"Arundhati",
""
]
] | A density matrix is defined using coherent states for space-times with apparent horizons. Evolving the density matrix in time gives the origin of Hawking radiation. |
1611.00452 | Hyeong-Chan Kim | Hyeong-Chan Kim and Chueng-Ryong Ji | Matter Equation of State in General Relativity | 12 pages, 5 figures | Phys. Rev. D 95, 084045 (2017) | 10.1103/PhysRevD.95.084045 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how a strong gravity affects the equation of state of matters. For
this purpose, we employ a canonical ensemble of classical monoatomic ideal gas
inside a box in a Rindler spacetime. The total energy decreases monotonically
with the increase of the external gravity representing its attractiveness. It
is howe... | [
{
"created": "Wed, 2 Nov 2016 02:38:27 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Mar 2017 04:16:55 GMT",
"version": "v2"
}
] | 2017-05-03 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Ji",
"Chueng-Ryong",
""
]
] | We study how a strong gravity affects the equation of state of matters. For this purpose, we employ a canonical ensemble of classical monoatomic ideal gas inside a box in a Rindler spacetime. The total energy decreases monotonically with the increase of the external gravity representing its attractiveness. It is howeve... |
gr-qc/9902023 | E. G. Vertogradova | Yu.S. Grishkan, E.G. Vertogradova | Quantum gravitational processes in a hot ultrarelativistic gas and their
effect on the isotropic Universe evolution | 7 pages, LaTeX | null | null | null | gr-qc | null | The variant of quasiclassical (half-quantum) theory of gravity in strong
gravitational field is presented. The exact solution of the problem of the
renormalized energy-momentum tensor calculation is performed in terms of
non-local operator-signed function. The procedure of quasilocalization is
proposed, which leads t... | [
{
"created": "Tue, 9 Feb 1999 18:22:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grishkan",
"Yu. S.",
""
],
[
"Vertogradova",
"E. G.",
""
]
] | The variant of quasiclassical (half-quantum) theory of gravity in strong gravitational field is presented. The exact solution of the problem of the renormalized energy-momentum tensor calculation is performed in terms of non-local operator-signed function. The procedure of quasilocalization is proposed, which leads to ... |
1509.08008 | Lorenzo Fatibene | Salvatore Capozziello, Mariafelicia F. De Laurentis, Lorenzo Fatibene,
Marco Ferraris and Simon Garruto | Extended Cosmologies | null | SIGMA 12 (2016), 006, 16 pages | 10.3842/SIGMA.2016.006 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We shall discuss cosmological models in extended theories of gravitation. We
shall define a surface, called the model surface, in the space of observable
parameters which characterises families of theories. We also show how this
surface can be used to compare with observations. The model surface can
potentially be us... | [
{
"created": "Sat, 26 Sep 2015 16:44:28 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Dec 2015 23:12:13 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Jan 2016 05:38:41 GMT",
"version": "v3"
}
] | 2016-01-21 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Laurentis",
"Mariafelicia F.",
""
],
[
"Fatibene",
"Lorenzo",
""
],
[
"Ferraris",
"Marco",
""
],
[
"Garruto",
"Simon",
""
]
] | We shall discuss cosmological models in extended theories of gravitation. We shall define a surface, called the model surface, in the space of observable parameters which characterises families of theories. We also show how this surface can be used to compare with observations. The model surface can potentially be used... |
1310.0300 | Betti Hartmann | Betti Hartmann (Jacobs University Bremen, Germany) | Stability of black holes and solitons in Anti-de Sitter space-time | 5 pages containing the written version of a talk given at the "Light
Cone" Conference, Delhi, India in December 2012; to appear in Nucl. Phys. B
Proceedings Supplement | Nuclear Physics B (Proceedings Supplements) (2014), pp. 45-49 | 10.1016/j.nuclphysbps.2014.04.008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stability of black holes and solitons in d-dimensional Anti-de Sitter
space-time against scalar field condensation is discussed. The resulting
solutions are "hairy" black holes and solitons, respectively. In particular, we
will discuss static black hole solutions with hyperbolic, flat and spherical
horizon topolo... | [
{
"created": "Tue, 1 Oct 2013 14:00:52 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Hartmann",
"Betti",
"",
"Jacobs University Bremen, Germany"
]
] | The stability of black holes and solitons in d-dimensional Anti-de Sitter space-time against scalar field condensation is discussed. The resulting solutions are "hairy" black holes and solitons, respectively. In particular, we will discuss static black hole solutions with hyperbolic, flat and spherical horizon topology... |
2403.11372 | Leon Escobar Diaz | Leon Escobar-Diaz and Chris Stevens | Approximations of the quasi-local Bartnik mass in general relativity | 26 pages, 15 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we employ eth-operators and spin-weighted spherical harmonics
to express the ADM mass of a static space-time based on the mean values of its
components over a a radius-$r$ sphere. While initially derived for standard
spherical coordinates, we showcase its adaptability by demonstrating its
usefulness in... | [
{
"created": "Sun, 17 Mar 2024 23:38:18 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Escobar-Diaz",
"Leon",
""
],
[
"Stevens",
"Chris",
""
]
] | In this study, we employ eth-operators and spin-weighted spherical harmonics to express the ADM mass of a static space-time based on the mean values of its components over a a radius-$r$ sphere. While initially derived for standard spherical coordinates, we showcase its adaptability by demonstrating its usefulness in e... |
2311.08659 | Kent Yagi | Kent Yagi, Samantha Lomuscio, Tristen Lowrey, Zack Carson | Regularizing Parameterized Black Hole Spacetimes with Kerr Symmetries | 21 pages, 8 figures; added an appendix and references; accepted for
publication in PRD | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Parameterized Kerr spacetimes allow us to test the nature of black holes in
model-independent ways. Such spacetimes contain several arbitrary functions
and, as a matter of practicality, one Taylor expands them about infinity and
keeps only to finite orders in the expansion. In this paper, we focus on the
parameterize... | [
{
"created": "Wed, 15 Nov 2023 02:46:48 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2024 16:20:27 GMT",
"version": "v2"
}
] | 2024-01-22 | [
[
"Yagi",
"Kent",
""
],
[
"Lomuscio",
"Samantha",
""
],
[
"Lowrey",
"Tristen",
""
],
[
"Carson",
"Zack",
""
]
] | Parameterized Kerr spacetimes allow us to test the nature of black holes in model-independent ways. Such spacetimes contain several arbitrary functions and, as a matter of practicality, one Taylor expands them about infinity and keeps only to finite orders in the expansion. In this paper, we focus on the parameterized ... |
gr-qc/0502119 | John Ellis | John Ellis, N.E. Mavromatos, D.V. Nanopoulos | Liouville Cosmology | 23 pages latex, 2 eps figures, contribution to the proceedings of the
Dark 2004 conference, College Station, October 2004 | null | null | CERN-PH-TH/2005-037 | gr-qc astro-ph hep-th | null | Liouville string theory is a natural framework for discussing the
non-equilibrium evolution of the Universe. It enables non-critical strings to
be treated in mathematically consistent manner, in which target time is
identified with a world-sheet renormalization-group scale parameter, preserving
target-space general c... | [
{
"created": "Mon, 28 Feb 2005 18:07:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ellis",
"John",
""
],
[
"Mavromatos",
"N. E.",
""
],
[
"Nanopoulos",
"D. V.",
""
]
] | Liouville string theory is a natural framework for discussing the non-equilibrium evolution of the Universe. It enables non-critical strings to be treated in mathematically consistent manner, in which target time is identified with a world-sheet renormalization-group scale parameter, preserving target-space general coo... |
1705.10773 | Stephon Alexander | Stephon Alexander, Laura Mersini-Houghton | On a Relation of Vacuum Energy to the Hierarchy of Forces | 7 Pages | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the relation between vacuum energy and the hierarchy of forces
in habitable universes. The hierarchy of forces studied in \cite{fred} was
bound by $\frac{\alpha_G}{\alpha} \le 10^{-34}$, using structure formation
arguments which involve the fine structure constant $\alpha$ and the
gravitational constan... | [
{
"created": "Tue, 30 May 2017 17:52:28 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2017 18:17:17 GMT",
"version": "v2"
}
] | 2017-09-05 | [
[
"Alexander",
"Stephon",
""
],
[
"Mersini-Houghton",
"Laura",
""
]
] | We investigate the relation between vacuum energy and the hierarchy of forces in habitable universes. The hierarchy of forces studied in \cite{fred} was bound by $\frac{\alpha_G}{\alpha} \le 10^{-34}$, using structure formation arguments which involve the fine structure constant $\alpha$ and the gravitational constant ... |
2303.05638 | Jiawei Hu | Yuebing Zhou, Jiawei Hu, Hongwei Yu | Detecting circular Unruh effect with quantum entanglement | 5 pages, 2 figures | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the asymptotic state of a quantum system composed of two atoms
in circular motion in vacuum can be entangled when the angular velocity and the
radius of the orbit are appropriate. The asymptotic entanglement as a result of
centripetal acceleration is initial-state independent and can be viewed as a
manif... | [
{
"created": "Fri, 10 Mar 2023 00:53:13 GMT",
"version": "v1"
}
] | 2023-03-13 | [
[
"Zhou",
"Yuebing",
""
],
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | We show that the asymptotic state of a quantum system composed of two atoms in circular motion in vacuum can be entangled when the angular velocity and the radius of the orbit are appropriate. The asymptotic entanglement as a result of centripetal acceleration is initial-state independent and can be viewed as a manifes... |
1505.03045 | Peng Wang | Jun Tao, Peng Wang, and Haitang Yang | Black Hole Radiation with Modified Dispersion Relation in Tunneling
Paradigm: Static Frame | 49pages, 2 figures; updated to match journal version | Nucl.Phys. B922 (2017) 346-383 | 10.1016/j.nuclphysb.2017.06.022 | CTP-SCU/2015008 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Due to the exponential high gravitational red shift near the event horizon of
a black hole, it might appears that the Hawking radiation would be highly
sensitive to some unknown high energy physics. To study possible deviations
from the Hawking's prediction, the dispersive field theory models have been
proposed, foll... | [
{
"created": "Tue, 12 May 2015 15:03:04 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2017 03:24:21 GMT",
"version": "v2"
}
] | 2017-11-08 | [
[
"Tao",
"Jun",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | Due to the exponential high gravitational red shift near the event horizon of a black hole, it might appears that the Hawking radiation would be highly sensitive to some unknown high energy physics. To study possible deviations from the Hawking's prediction, the dispersive field theory models have been proposed, follow... |
1510.02068 | Shahram Jalalzadeh | T. Rostami and S. Jalalzadeh | Why the measured cosmological constant is small | 7 pages, 1 figures, to appear in Physics of Dark Universe | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a quest to explain the small value of the today's cosmological constant,
following the approach introduced in [1], we show that the theoretical value of
cosmological constant is consistent with its observational value. In more
detail, we study the Freidmann-Lama\^{\i}tre-Robertson-Walker cosmology
embedded isometr... | [
{
"created": "Wed, 7 Oct 2015 19:24:10 GMT",
"version": "v1"
}
] | 2015-10-08 | [
[
"Rostami",
"T.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | In a quest to explain the small value of the today's cosmological constant, following the approach introduced in [1], we show that the theoretical value of cosmological constant is consistent with its observational value. In more detail, we study the Freidmann-Lama\^{\i}tre-Robertson-Walker cosmology embedded isometric... |
2404.03724 | David Sola Gil | Alex Davey, Oscar J.C. Dias, David Sola Gil | Strong Cosmic Censorship in Kerr-Newman-de Sitter | 55 pages, 13 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Christodoulou's formulation of Strong Cosmic Censorship (SCC) holds true for
Kerr-de Sitter black holes. On the other hand, Reissner-Nordstr\"om-de Sitter
black holes violate SCC. We do a detailed scan of the parameter space of
Kerr-Newman-de Sitter black holes between these two limiting families, to
identify the bou... | [
{
"created": "Thu, 4 Apr 2024 18:00:03 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Davey",
"Alex",
""
],
[
"Dias",
"Oscar J. C.",
""
],
[
"Gil",
"David Sola",
""
]
] | Christodoulou's formulation of Strong Cosmic Censorship (SCC) holds true for Kerr-de Sitter black holes. On the other hand, Reissner-Nordstr\"om-de Sitter black holes violate SCC. We do a detailed scan of the parameter space of Kerr-Newman-de Sitter black holes between these two limiting families, to identify the bound... |
2104.05451 | Christian Corda Prof. | C. Corda, F. Feleppa, F. Tamburini, and I. Licata | Quantum oscillations in the black hole horizon | 29 pages.Comments are welcome. arXiv admin note: text overlap with
arXiv:1912.06478 | Theoretical and Mathematical Physics, 213(2): 1632-1664 (2022) | 10.1134/S0040577922110083 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By applying Rosen's quantization approach to the historical Oppenheimer and
Snyder gravitational collapse and by setting the constraints for the formation
of the Schwarzschild black hole (SBH), in a previous paper [1] two of the
Authors (CC and FF) found the gravitational potential, the Schrodinger
equation, the solu... | [
{
"created": "Fri, 9 Apr 2021 16:29:29 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Corda",
"C.",
""
],
[
"Feleppa",
"F.",
""
],
[
"Tamburini",
"F.",
""
],
[
"Licata",
"I.",
""
]
] | By applying Rosen's quantization approach to the historical Oppenheimer and Snyder gravitational collapse and by setting the constraints for the formation of the Schwarzschild black hole (SBH), in a previous paper [1] two of the Authors (CC and FF) found the gravitational potential, the Schrodinger equation, the soluti... |
0910.3413 | Jorge P\'aramos | J. P\'aramos and O. Bertolami | The Galileo satellite constellation and modifications to the
inverse-square law for Gravitation | 5 pages, 2 figures. Based on talk presented by one of us (J.P.) at
the 2nd. Colloquium "Scientific and Fundamental Aspects of the Galileo
Programme", Padua, Italy, 14-16 October 2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the impact of a power-law correction to the Newtonian potential,
inspired by ungravity or $f(R)$ extensions of the Standard Model, and draw
conclusions on the possibility of measuring the relevant parameters through
observables made available by the Galileo satellite positioning system.
| [
{
"created": "Sun, 18 Oct 2009 20:43:17 GMT",
"version": "v1"
}
] | 2009-10-20 | [
[
"Páramos",
"J.",
""
],
[
"Bertolami",
"O.",
""
]
] | We consider the impact of a power-law correction to the Newtonian potential, inspired by ungravity or $f(R)$ extensions of the Standard Model, and draw conclusions on the possibility of measuring the relevant parameters through observables made available by the Galileo satellite positioning system. |
gr-qc/0106006 | Denis V. Proskurin | V. Pervushin, D. Proskurin | Conformal General Relativity | 8 pages, Latex file, 2 figures, Invited talk given at the V
International Conference on Cosmoparticle Physics (Cosmion-2001) dedicated to
80-th Anniversary of Andrei D. Sakharov (21-30 May 2001, Moscow-St.Peterburg,
Russia) | Grav.Cosmol.Suppl.8N1:161-167,2002 | null | null | gr-qc astro-ph hep-th | null | The inflation-free solution of problems of the modern cosmology (horizon,
cosmic initial data, Planck era, arrow of time, singularity,homogeneity, and so
on) is considered in the conformal-invariant unified theory given in the space
with geometry of similarity where we can measure only the conformal-invariant
ratio o... | [
{
"created": "Sun, 3 Jun 2001 15:51:37 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Pervushin",
"V.",
""
],
[
"Proskurin",
"D.",
""
]
] | The inflation-free solution of problems of the modern cosmology (horizon, cosmic initial data, Planck era, arrow of time, singularity,homogeneity, and so on) is considered in the conformal-invariant unified theory given in the space with geometry of similarity where we can measure only the conformal-invariant ratio of ... |
1504.06337 | Yi-Zen Chu | Yi-Zen Chu | Transverse-Traceless Gravitational Waves In A Spatially Flat FLRW
Universe: Causal Structure from Dimension Reduction | 29 pages, 2 figures | Phys. Rev. D 92, 124038 (2015) | 10.1103/PhysRevD.92.124038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work was mainly driven by the desire to explore, to what extent
embedding some given geometry in a higher dimensional flat one is useful for
understanding the causal structure of classical fields traveling in the former,
in terms of that in the latter. We point out, in the 4D spatially flat FLRW
universe, that t... | [
{
"created": "Thu, 23 Apr 2015 20:42:14 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2015 02:50:14 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Nov 2015 08:01:53 GMT",
"version": "v3"
}
] | 2015-12-30 | [
[
"Chu",
"Yi-Zen",
""
]
] | This work was mainly driven by the desire to explore, to what extent embedding some given geometry in a higher dimensional flat one is useful for understanding the causal structure of classical fields traveling in the former, in terms of that in the latter. We point out, in the 4D spatially flat FLRW universe, that the... |
0904.1775 | Masato Minamitsuji | Vladimir Dzhunushaliev, Vladimir Folomeev and Masato Minamitsuji | Thick brane solutions | The journal version | Rept.Prog.Phys.73:066901,2010 | 10.1088/0034-4885/73/6/066901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article gives a comprehensive review on thick brane solutions and
related topics. Such models have attracted much attention from many aspects
since the birth of the brane world scenario. In many works, it has been usually
assumed that a brane is an infinitely thin object; however in more general
situations, one ... | [
{
"created": "Sat, 11 Apr 2009 03:10:10 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2009 14:38:43 GMT",
"version": "v2"
},
{
"created": "Wed, 20 May 2009 05:35:57 GMT",
"version": "v3"
},
{
"created": "Thu, 18 Mar 2010 06:53:18 GMT",
"version": "v4"
}
] | 2014-11-18 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | This article gives a comprehensive review on thick brane solutions and related topics. Such models have attracted much attention from many aspects since the birth of the brane world scenario. In many works, it has been usually assumed that a brane is an infinitely thin object; however in more general situations, one ca... |
0901.4308 | Dinesh Singh | Dinesh Singh, Nader Mobed, Pierre-Philippe Ouimet | Signatures of Noncommutative Geometry in Muon Decay for Nonsymmetric
Gravity | 4 pages; REVTeX file; 1 figure | Found.Phys.40:1789-1799,2010 | 10.1007/s10701-010-9487-2 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown how to identify potential signatures of noncommutative geometry
within the decay spectrum of a muon in orbit near the event horizon of a
microscopic Schwarzschild black hole. This possibility follows from a
re-interpretation of J.W. Moffat's nonsymmetric theory of gravity, first
published in Phys. Rev. D ... | [
{
"created": "Tue, 27 Jan 2009 18:30:35 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Singh",
"Dinesh",
""
],
[
"Mobed",
"Nader",
""
],
[
"Ouimet",
"Pierre-Philippe",
""
]
] | It is shown how to identify potential signatures of noncommutative geometry within the decay spectrum of a muon in orbit near the event horizon of a microscopic Schwarzschild black hole. This possibility follows from a re-interpretation of J.W. Moffat's nonsymmetric theory of gravity, first published in Phys. Rev. D 19... |
gr-qc/0510033 | Derek Wise | Derek K. Wise | Lattice p-Form Electromagnetism and Chain Field Theory | 61 pages; a version with better graphics and some related materials
can be obtained at http://math.ucr.edu/~derek/pform | null | null | null | gr-qc | null | Since Wilson's work on lattice gauge theory in the 1970s, discrete versions
of field theories have played a vital role in fundamental physics. But there is
recent interest in certain higher dimensional analogues of gauge theory, such
as p-form electromagnetism, including the Kalb-Ramond field in string theory,
and it... | [
{
"created": "Sat, 8 Oct 2005 03:56:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wise",
"Derek K.",
""
]
] | Since Wilson's work on lattice gauge theory in the 1970s, discrete versions of field theories have played a vital role in fundamental physics. But there is recent interest in certain higher dimensional analogues of gauge theory, such as p-form electromagnetism, including the Kalb-Ramond field in string theory, and its ... |
1701.08406 | Ezra Newman | Ezra T. Newman | Surprising Structures Hiding at Penrose's Future Null Infinity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the late1950s, almost all discussions of Asymptotically Flat
(Einstein-Maxwell) Space-Times have taken place in the context of Penrose's
Null Infinity, $\mathcal{I}^{+}.$\ $\ $In addition,\ almost all calculations
have used the Bondi coordinate and tetrad systems. \ We show - first, that
there are other natural... | [
{
"created": "Sun, 29 Jan 2017 17:28:57 GMT",
"version": "v1"
}
] | 2017-01-31 | [
[
"Newman",
"Ezra T.",
""
]
] | Since the late1950s, almost all discussions of Asymptotically Flat (Einstein-Maxwell) Space-Times have taken place in the context of Penrose's Null Infinity, $\mathcal{I}^{+}.$\ $\ $In addition,\ almost all calculations have used the Bondi coordinate and tetrad systems. \ We show - first, that there are other natural c... |
gr-qc/0605137 | Mohammad Sharaz Butt | M. S. Butt | Leading quantum gravitational corrections to QED | 14 pages, 29 figures, format RevTex4 | Phys.Rev.D74:125007,2006 | 10.1103/PhysRevD.74.125007 | null | gr-qc | null | We consider the leading post-Newtonian and quantum corrections to the
non-relativistic scattering amplitude of charged spin-1/2 fermions in the
combined theory of general relativity and QED. The coupled Dirac-Einstein
system is treated as an effective field theory. This allows for a consistent
quantization of the gra... | [
{
"created": "Mon, 29 May 2006 15:23:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Butt",
"M. S.",
""
]
] | We consider the leading post-Newtonian and quantum corrections to the non-relativistic scattering amplitude of charged spin-1/2 fermions in the combined theory of general relativity and QED. The coupled Dirac-Einstein system is treated as an effective field theory. This allows for a consistent quantization of the gravi... |
2004.07505 | Yorgo Senikoglu | Tekin Dereli and Yorgo Senikoglu | Electric Charge Screening By Non-Minimal Couplings Of Electromagnetic
Fields To Gravity | Accepted version to be published in EPL | null | 10.1209/0295-5075/131/10006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A case of non-minimal couplings between gravity and electromagnetic fields is
presented. The field equations are worked out in the language of exterior
differential forms. An exact charge screening class of solutions is given with
a specific discussion on the polarisation and magnetisation of spacetime. The
consequen... | [
{
"created": "Thu, 16 Apr 2020 07:52:45 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jul 2020 16:20:04 GMT",
"version": "v2"
}
] | 2020-12-02 | [
[
"Dereli",
"Tekin",
""
],
[
"Senikoglu",
"Yorgo",
""
]
] | A case of non-minimal couplings between gravity and electromagnetic fields is presented. The field equations are worked out in the language of exterior differential forms. An exact charge screening class of solutions is given with a specific discussion on the polarisation and magnetisation of spacetime. The consequence... |
gr-qc/0511069 | Edward Anderson | E. Anderson | Relational Particle Models. II. Use as toy models for quantum
geometrodynamics | Replaced with published version. Minor changes only; 1 reference
corrected | Class.Quant.Grav.23:2491-2518,2006 | 10.1088/0264-9381/23/7/017 | null | gr-qc | null | Relational particle models are employed as toy models for the study of the
Problem of Time in quantum geometrodynamics. These models' analogue of the thin
sandwich is resolved. It is argued that the relative configuration space and
shape space of these models are close analogues from various perspectives of
superspac... | [
{
"created": "Mon, 14 Nov 2005 07:36:20 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Aug 2006 20:09:03 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Anderson",
"E.",
""
]
] | Relational particle models are employed as toy models for the study of the Problem of Time in quantum geometrodynamics. These models' analogue of the thin sandwich is resolved. It is argued that the relative configuration space and shape space of these models are close analogues from various perspectives of superspace ... |
gr-qc/0309110 | Pavel Klepac | J Gersl, P Klepac and J Horsky | A charged rotating cylindrical shell | 14 pages, 4 figures, minor corrections, to appear in Gen.Rel.Grav | Gen.Rel.Grav. 36 (2004) 1399-1413 | 10.1023/B:GERG.0000022394.97195.07 | null | gr-qc | null | We give an example of a spacetime having an infinite thin rotating
cylindrical shell constituted by a charged perfect fluid as a source. As the
interior of the shell the Bonnor--Melvin universe is considered, while its
exterior is represented by Datta--Raychaudhuri spacetime. We discuss the energy
conditions and we s... | [
{
"created": "Tue, 23 Sep 2003 10:04:14 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Nov 2003 14:40:46 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Feb 2004 13:44:49 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Gersl",
"J",
""
],
[
"Klepac",
"P",
""
],
[
"Horsky",
"J",
""
]
] | We give an example of a spacetime having an infinite thin rotating cylindrical shell constituted by a charged perfect fluid as a source. As the interior of the shell the Bonnor--Melvin universe is considered, while its exterior is represented by Datta--Raychaudhuri spacetime. We discuss the energy conditions and we sho... |
1205.4348 | Vasiliy P. Neznamov | M.V. Gorbatenko, V.P. Neznamov | Stationary Bound States of Dirac Particles in Collapsar Fields | 7 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stationary bound states of elementary spin 1/2 particles that do not decay
with time are obtained for a Schwarzschild gravitational field using a
self-conjugate Hamiltonian with a flat scalar product at small values of
gravitational coupling constant. In order to obtain a discrete energy spectrum,
we introduce a boun... | [
{
"created": "Sat, 19 May 2012 17:15:12 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Jun 2013 14:32:50 GMT",
"version": "v2"
}
] | 2013-07-02 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Neznamov",
"V. P.",
""
]
] | Stationary bound states of elementary spin 1/2 particles that do not decay with time are obtained for a Schwarzschild gravitational field using a self-conjugate Hamiltonian with a flat scalar product at small values of gravitational coupling constant. In order to obtain a discrete energy spectrum, we introduce a bounda... |
2305.15446 | Alexander Zakharov | Alexander F. Zakharov | Constraints on black hole charges in M87* and Sgr A* with the EHT
observations | presented as a talk at ICRANet Meeting in May 2022 | null | null | null | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | In May 2022 ICRANet organized the Workshop dedicated to the 80th anniversary
of Professor Ruffini. This paper is based on the talk delivered at the meeting.
Professor Ruffini was well known for Soviet scientific community not only due
to his publications in leading journals but also due Russian translations of
his ... | [
{
"created": "Wed, 24 May 2023 09:42:38 GMT",
"version": "v1"
}
] | 2023-05-26 | [
[
"Zakharov",
"Alexander F.",
""
]
] | In May 2022 ICRANet organized the Workshop dedicated to the 80th anniversary of Professor Ruffini. This paper is based on the talk delivered at the meeting. Professor Ruffini was well known for Soviet scientific community not only due to his publications in leading journals but also due Russian translations of his book... |
gr-qc/0607041 | Amitabh Virmani | Robert B. Mann, Donald Marolf, Amitabh Virmani | Covariant Counterterms and Conserved Charges in Asymptotically Flat
Spacetimes | 27 pages; Dedicated to Rafael Sorkin on the occasion of his 60th
birthday; v2 minor changes | Class.Quant.Grav. 23 (2006) 6357-6378 | 10.1088/0264-9381/23/22/017 | null | gr-qc hep-th | null | Recent work has shown that the addition of an appropriate covariant boundary
term to the gravitational action yields a well-defined variational principle
for asymptotically flat spacetimes and thus leads to a natural definition of
conserved quantities at spatial infinity. Here we connect such results to other
formali... | [
{
"created": "Mon, 10 Jul 2006 23:19:55 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jul 2006 20:40:57 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Mann",
"Robert B.",
""
],
[
"Marolf",
"Donald",
""
],
[
"Virmani",
"Amitabh",
""
]
] | Recent work has shown that the addition of an appropriate covariant boundary term to the gravitational action yields a well-defined variational principle for asymptotically flat spacetimes and thus leads to a natural definition of conserved quantities at spatial infinity. Here we connect such results to other formalism... |
2210.06173 | Luca Guido Molinari | Carlo Alberto Mantica and Luca Guido Molinari | Codazzi tensors and their space-times, and Cotton gravity | 19 pages, no figures. We added a discussion of Yang Pure spaces, with
references. Eq.45 and the Ricci tensor in the proof of Prop.2.3 (this
version) are now correct | General Relativity and Gravitation, 2023 - open access | 10.1007/s10714-023-03106-7 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometric properties of certain Codazzi tensors for their own
sake, and for their appearance in the recent theory of Cotton gravity. We prove
that a perfect-fluid tensor is Codazzi if and only if the metric is a
generalized Stephani universe. A trace condition restricts it to a warped
space-time, as prov... | [
{
"created": "Wed, 12 Oct 2022 13:09:46 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Oct 2022 10:33:57 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Oct 2022 11:51:33 GMT",
"version": "v3"
},
{
"created": "Wed, 23 Nov 2022 12:47:31 GMT",
"version": "v4"
},
{
"c... | 2023-04-28 | [
[
"Mantica",
"Carlo Alberto",
""
],
[
"Molinari",
"Luca Guido",
""
]
] | We study the geometric properties of certain Codazzi tensors for their own sake, and for their appearance in the recent theory of Cotton gravity. We prove that a perfect-fluid tensor is Codazzi if and only if the metric is a generalized Stephani universe. A trace condition restricts it to a warped space-time, as proven... |
1910.00148 | Eduardo Rodr\'iguez | Jos\'e Barrientos, Fabrizio Cordonier-Tello, Crist\'obal Corral,
Fernando Izaurieta, Perla Medina, Eduardo Rodr\'iguez, Omar Valdivia | Luminal Propagation of Gravitational Waves in Scalar-tensor Theories:
The Case for Torsion | 16 pages, 2 figures. v2: 17 pages, 2 figures, updated references. v3:
17 pages, 2 figures, minor changes, version accepted for publication in PRD | Phys. Rev. D 100, 124039 (2019) | 10.1103/PhysRevD.100.124039 | LMU-ASC 33/19 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor gravity theories with a nonminimal Gauss-Bonnet coupling
typically lead to an anomalous propagation speed for gravitational waves, and
have therefore been tightly constrained by multimessenger observations such as
GW170817/GRB170817A. In this paper we show that this is not a general feature
of scalar-te... | [
{
"created": "Mon, 30 Sep 2019 23:14:51 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Nov 2019 21:04:35 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Dec 2019 18:11:17 GMT",
"version": "v3"
}
] | 2019-12-18 | [
[
"Barrientos",
"José",
""
],
[
"Cordonier-Tello",
"Fabrizio",
""
],
[
"Corral",
"Cristóbal",
""
],
[
"Izaurieta",
"Fernando",
""
],
[
"Medina",
"Perla",
""
],
[
"Rodríguez",
"Eduardo",
""
],
[
"Valdivia",
"Omar"... | Scalar-tensor gravity theories with a nonminimal Gauss-Bonnet coupling typically lead to an anomalous propagation speed for gravitational waves, and have therefore been tightly constrained by multimessenger observations such as GW170817/GRB170817A. In this paper we show that this is not a general feature of scalar-tens... |
0901.2644 | Yun-Song Piao | Yun-Song Piao | Proliferation in Cycle | 6 pages, discussions clarified,v3:published version | Phys.Lett.B677:1-5,2009 | 10.1016/j.physletb.2009.05.009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the contracting phase with w\simeq 0, the scale invariant spectrum of
curvature perturbation is given by the increasing mode of metric perturbation.
In this paper, it is found that if the contracting phase with w\simeq 0 is
included in each cycle of a cycle universe, since the metric perturbation is
amplified on s... | [
{
"created": "Sun, 18 Jan 2009 06:22:40 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Feb 2009 13:10:36 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Jun 2009 02:51:29 GMT",
"version": "v3"
}
] | 2010-05-28 | [
[
"Piao",
"Yun-Song",
""
]
] | In the contracting phase with w\simeq 0, the scale invariant spectrum of curvature perturbation is given by the increasing mode of metric perturbation. In this paper, it is found that if the contracting phase with w\simeq 0 is included in each cycle of a cycle universe, since the metric perturbation is amplified on sup... |
2105.04411 | Alfred Y. Shaikh | A.Y.Shaikh | Diagnosing Renyi and Tsallis Holographic Dark Energy Models with
Hubble's Horizon Cutoff | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, I framed the Renyi and Tsallis Holographic Dark Energy (HDE)
models within the presence of a spatially flat and isotropic FRW model filled
with matter and dark energy in teleparallel gravity. The energy densities of
Renyi HDE and Tsallis holographic dark energy (THDE) are increasing functions
of z and v... | [
{
"created": "Thu, 6 May 2021 05:55:51 GMT",
"version": "v1"
}
] | 2021-05-11 | [
[
"Shaikh",
"A. Y.",
""
]
] | In this work, I framed the Renyi and Tsallis Holographic Dark Energy (HDE) models within the presence of a spatially flat and isotropic FRW model filled with matter and dark energy in teleparallel gravity. The energy densities of Renyi HDE and Tsallis holographic dark energy (THDE) are increasing functions of z and val... |
1212.6770 | Mohammad Nouri-Zonoz | S. Zeynizadeh and M. Nouri-Zonoz | Primordial black holes, zero-point energy and the CMB: The cosmic
connection | 11 pages, 3 figures, Some detailed calculations are added | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a possible resolution to the cosmological constant problem through
a scenario in which the universe is composed of three components: matter,
radiation (CMB) and vacuum energy such that vacuum energy is not constant and
is decaying into the matter component. Matter in this scenario consists of
baryonic matt... | [
{
"created": "Sun, 30 Dec 2012 20:29:07 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Feb 2013 08:39:28 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jun 2014 07:24:26 GMT",
"version": "v3"
}
] | 2014-06-05 | [
[
"Zeynizadeh",
"S.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | We propose a possible resolution to the cosmological constant problem through a scenario in which the universe is composed of three components: matter, radiation (CMB) and vacuum energy such that vacuum energy is not constant and is decaying into the matter component. Matter in this scenario consists of baryonic matter... |
1402.5127 | Daniel Grumiller | Daniel Grumiller, Robert McNees and Jakob Salzer | Black holes and thermodynamics - The first half century | 31pp + refs, invited contribution to "Quantum Aspects of Black Hole
Physics", Ed. Xavier Calmet (Springer, 2014) | null | 10.1007/978-3-319-10852-0_2 | TUW-14-03 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole thermodynamics emerged from the classical general relativistic
laws of black hole mechanics, summarized by Bardeen-Carter-Hawking, together
with the physical insights by Bekenstein about black hole entropy and the
semi-classical derivation by Hawking of black hole evaporation. The black hole
entropy law in... | [
{
"created": "Thu, 20 Feb 2014 20:32:39 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Mar 2014 12:28:42 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Mar 2014 12:07:57 GMT",
"version": "v3"
}
] | 2021-04-07 | [
[
"Grumiller",
"Daniel",
""
],
[
"McNees",
"Robert",
""
],
[
"Salzer",
"Jakob",
""
]
] | Black hole thermodynamics emerged from the classical general relativistic laws of black hole mechanics, summarized by Bardeen-Carter-Hawking, together with the physical insights by Bekenstein about black hole entropy and the semi-classical derivation by Hawking of black hole evaporation. The black hole entropy law insp... |
2010.00069 | Andrea Giusti | Valerio Faraoni, Andrea Giusti, Tyler F. Bean | Asymptotic flatness and Hawking quasilocal mass | 8 pages, no figures | Phys. Rev. D 103, 044026 (2021) | 10.1103/PhysRevD.103.044026 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out an association between anomalies in the Hawking quasilocal mass
(or, in spherical symmetry, in its better known version, the
Misner-Sharp-Hernandez mass) and unphysical properties of the spacetime
geometry. While anomalous behaviors show up in certain quantum-corrected black
holes, they are not unique to... | [
{
"created": "Wed, 30 Sep 2020 19:20:31 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Feb 2021 15:33:35 GMT",
"version": "v2"
}
] | 2021-02-17 | [
[
"Faraoni",
"Valerio",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Bean",
"Tyler F.",
""
]
] | We point out an association between anomalies in the Hawking quasilocal mass (or, in spherical symmetry, in its better known version, the Misner-Sharp-Hernandez mass) and unphysical properties of the spacetime geometry. While anomalous behaviors show up in certain quantum-corrected black holes, they are not unique to t... |
gr-qc/0701037 | Stephen G. Naculich | Thomas W. Baumgarte and Stephen G. Naculich | Analytical Representation of a Black Hole Puncture Solution | 4 pages, 2 figures | Phys.Rev.D75:067502,2007 | 10.1103/PhysRevD.75.067502 | BOW-PH-138 | gr-qc | null | The ``moving puncture'' technique has led to dramatic advancements in the
numerical simulations of binary black holes. Hannam et.al. have recently
demonstrated that, for suitable gauge conditions commonly employed in moving
puncture simulations, the evolution of a single black hole leads to a
well-known time-independ... | [
{
"created": "Fri, 5 Jan 2007 19:04:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Baumgarte",
"Thomas W.",
""
],
[
"Naculich",
"Stephen G.",
""
]
] | The ``moving puncture'' technique has led to dramatic advancements in the numerical simulations of binary black holes. Hannam et.al. have recently demonstrated that, for suitable gauge conditions commonly employed in moving puncture simulations, the evolution of a single black hole leads to a well-known time-independen... |
1303.1003 | Eugen Radu | Jutta Kunz, Eugen Radu and Bintoro Subagyo | Gravitating vortons as ring solitons in general relativity | 34 pages, 19 figures | null | 10.1103/PhysRevD.87.104022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vortons can be viewed as (flat space-) field theory analogs of black rings in
general relativity. They are made from loops of vortices, being sustained
against collapse by the centrifugal force. In this work we discuss such
configurations in the global version of Witten's U(1)xU(1) theory. We first
consider solutions... | [
{
"created": "Tue, 5 Mar 2013 12:12:03 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Mar 2013 17:02:54 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
],
[
"Subagyo",
"Bintoro",
""
]
] | Vortons can be viewed as (flat space-) field theory analogs of black rings in general relativity. They are made from loops of vortices, being sustained against collapse by the centrifugal force. In this work we discuss such configurations in the global version of Witten's U(1)xU(1) theory. We first consider solutions i... |
2211.11574 | Jingchao Zhang | Kai Shi, Yu Tian, Xiaoning Wu, Hongbao Zhang, and Jingchao Zhang | Dynamic and Thermodynamic Stability of Charged Perfect Fluid Stars | 20 pages, 1 figure, typos corrected, to appear in CQG | Class. Quantum Grav. 40, 145006(2023) | 10.1088/1361-6382/acdd44 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We perform a thorough analysis of the dynamic and thermodynamic stability for
the charged perfect fluid star by applying the Wald formalism to the Lagrangian
formulation of Einstein-Maxwell-charged fluid system. As a result, we find that
neither the presence of the additional electromagnetic field nor the Lorentz
for... | [
{
"created": "Fri, 18 Nov 2022 05:05:02 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jun 2023 05:00:18 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"Shi",
"Kai",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Xiaoning",
""
],
[
"Zhang",
"Hongbao",
""
],
[
"Zhang",
"Jingchao",
""
]
] | We perform a thorough analysis of the dynamic and thermodynamic stability for the charged perfect fluid star by applying the Wald formalism to the Lagrangian formulation of Einstein-Maxwell-charged fluid system. As a result, we find that neither the presence of the additional electromagnetic field nor the Lorentz force... |
gr-qc/0509032 | Sigbjorn Hervik | S. Hervik, R.J. van den Hoogen, W.C. Lim, and A.A. Coley | The Futures of Bianchi type VII0 cosmologies with vorticity | 23 pages, v2:references and comments added, typos fixed, to appear in
CQG | Class.Quant.Grav. 23 (2006) 845-866 | 10.1088/0264-9381/23/3/018 | null | gr-qc astro-ph | null | We use expansion-normalised variables to investigate the Bianchi type VII$_0$
model with a tilted $\gamma$-law perfect fluid. We emphasize the late-time
asymptotic dynamical behaviour of the models and determine their asymptotic
states. Unlike the other Bianchi models of solvable type, the type VII$_0$
state space is... | [
{
"created": "Fri, 9 Sep 2005 12:57:23 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2005 14:04:17 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Hervik",
"S.",
""
],
[
"Hoogen",
"R. J. van den",
""
],
[
"Lim",
"W. C.",
""
],
[
"Coley",
"A. A.",
""
]
] | We use expansion-normalised variables to investigate the Bianchi type VII$_0$ model with a tilted $\gamma$-law perfect fluid. We emphasize the late-time asymptotic dynamical behaviour of the models and determine their asymptotic states. Unlike the other Bianchi models of solvable type, the type VII$_0$ state space is u... |
2101.01795 | Giacomo Gradenigo | Giacomo Gradenigo | Symplectic quantization II: dynamics of space-time quantum fluctuations
and the cosmological constant | 11 pages | Found Phys 51, 64 (2021) | 10.1007/s10701-021-00468-3 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The symplectic quantization scheme proposed for matter scalar fields in the
companion paper "Symplectic quantization I" is generalized here to the case of
space-time quantum fluctuations. Symplectic quantization considers an explicit
dependence of the metric tensor $g_{\mu\nu}$ on an additional time variable,
named "... | [
{
"created": "Tue, 5 Jan 2021 21:32:02 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2021 12:16:40 GMT",
"version": "v2"
},
{
"created": "Thu, 27 May 2021 21:17:57 GMT",
"version": "v3"
}
] | 2021-05-31 | [
[
"Gradenigo",
"Giacomo",
""
]
] | The symplectic quantization scheme proposed for matter scalar fields in the companion paper "Symplectic quantization I" is generalized here to the case of space-time quantum fluctuations. Symplectic quantization considers an explicit dependence of the metric tensor $g_{\mu\nu}$ on an additional time variable, named "pr... |
gr-qc/0107093 | Hongya Liu | Hongya Liu and Paul S. Wesson | Universe Models with a Variable Cosmological "Constant" and a "Big
Bounce" | 17 pages, 2 figures, AASTEX. To appear in ApJ | Astrophys.J.562:1-6,2001 | 10.1086/323525 | null | gr-qc astro-ph | null | We present a rich class of exact solutions which contains radiation-dominated
and matter-dominated models for the early and late universe. They include a
variable cosmological ``constant'' which is derived from a higher dimension and
manifests itself in spacetime as an energy density for the vacuum. This is in
agreem... | [
{
"created": "Sat, 28 Jul 2001 07:11:23 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Liu",
"Hongya",
""
],
[
"Wesson",
"Paul S.",
""
]
] | We present a rich class of exact solutions which contains radiation-dominated and matter-dominated models for the early and late universe. They include a variable cosmological ``constant'' which is derived from a higher dimension and manifests itself in spacetime as an energy density for the vacuum. This is in agreemen... |
1910.04594 | Marco Calz\`a | Marco Calz\`a, Alessandro Casalino, Orlando Luongo, Lorenzo Sebastiani | Kinematic reconstructions of extended theories of gravity at small and
intermediate redshifts | 22 pages, 13 figures, accepted on EPJ Plus | Eur. Phys. J. Plus 135, 1 (2020) | 10.1140/epjp/s13360-019-00059-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the last few decades, extensions of General Relativity have reached always
more attention especially in view of possible breakdowns of the standard
$\Lambda$CDM paradigm at intermediate and high redshift regimes. If General
Relativity would not be the ultimate theory of gravity, modifying Einstein's
gravity in the... | [
{
"created": "Wed, 9 Oct 2019 15:44:52 GMT",
"version": "v1"
}
] | 2020-03-19 | [
[
"Calzà",
"Marco",
""
],
[
"Casalino",
"Alessandro",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Sebastiani",
"Lorenzo",
""
]
] | In the last few decades, extensions of General Relativity have reached always more attention especially in view of possible breakdowns of the standard $\Lambda$CDM paradigm at intermediate and high redshift regimes. If General Relativity would not be the ultimate theory of gravity, modifying Einstein's gravity in the h... |
1309.1690 | Astrid Eichhorn | Astrid Eichhorn and Tim Koslowski | Continuum limit in matrix models for quantum gravity from the Functional
Renormalization Group | 16 pages, 3 figures | Phys. Rev. D 88, 084016 (2013) | 10.1103/PhysRevD.88.084016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the double-scaling limit in matrix models for two-dimensional
quantum gravity, and establish the nonperturbative functional Renormalization
Group as a novel technique to compute the corresponding interacting fixed point
of the Renormalization Group flow. We explicitly evaluate critical exponents
and compa... | [
{
"created": "Fri, 6 Sep 2013 16:17:21 GMT",
"version": "v1"
}
] | 2013-10-30 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Koslowski",
"Tim",
""
]
] | We consider the double-scaling limit in matrix models for two-dimensional quantum gravity, and establish the nonperturbative functional Renormalization Group as a novel technique to compute the corresponding interacting fixed point of the Renormalization Group flow. We explicitly evaluate critical exponents and compare... |
gr-qc/0502006 | Yun-Song Piao | Yun-Song Piao | D/antiD Dark Energy in String Warped Compactification | 10 pages, 2 eps figures, v2 revised version to be published in PRD | Phys.Rev.D71:107301,2005 | 10.1103/PhysRevD.71.107301 | null | gr-qc | null | We study the evolution of relic D3-branes after the D3/\bd-brane inflation in
string warped compactification. The motion of D3-branes can be frozen under
certain condition during the radiation/matter domination. These D3-branes can
not be released until the D3/\bd-branes potential energy becomes dominated at
late tim... | [
{
"created": "Wed, 2 Feb 2005 09:02:25 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2005 07:13:28 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Piao",
"Yun-Song",
""
]
] | We study the evolution of relic D3-branes after the D3/\bd-brane inflation in string warped compactification. The motion of D3-branes can be frozen under certain condition during the radiation/matter domination. These D3-branes can not be released until the D3/\bd-branes potential energy becomes dominated at late time.... |
2407.07547 | Amol Sasane | Jos\'e Nat\'ario, Amol Sasane, Rodrigo Vicente | Elastic rods and elastic spinning rings as gravitational wave detectors | 29 pages, 1 figure | null | null | null | gr-qc physics.class-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Linearised relativistic elasticity equations of motion are considered for a
rod and a spinning ring encountering a gravitational wave. In the case of the
rod, the equations reduce to a wave equation with appropriate boundary
conditions. Using Fourier transforms, the resonant frequencies are found and an
explicit dist... | [
{
"created": "Wed, 10 Jul 2024 11:15:32 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Natário",
"José",
""
],
[
"Sasane",
"Amol",
""
],
[
"Vicente",
"Rodrigo",
""
]
] | Linearised relativistic elasticity equations of motion are considered for a rod and a spinning ring encountering a gravitational wave. In the case of the rod, the equations reduce to a wave equation with appropriate boundary conditions. Using Fourier transforms, the resonant frequencies are found and an explicit distri... |
2206.08816 | S. Danial Forghani | S. Danial Forghani and S. Habib Mazharimousavi | A Closed Universe: de Sitter Cosmic Gate | 6 pages, 4 figures | null | 10.1016/j.physletb.2022.137411 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | A new cosmological object in analogy with the concept of a wormhole in
general relativity is introduced. As wormholes connect two distant points
through a tunnel in spacetime, this new object connects two spacetime through a
large mouth which is referred to as a "Cosmic Gate". In this context, two
identical copies of... | [
{
"created": "Fri, 17 Jun 2022 14:49:03 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Forghani",
"S. Danial",
""
],
[
"Mazharimousavi",
"S. Habib",
""
]
] | A new cosmological object in analogy with the concept of a wormhole in general relativity is introduced. As wormholes connect two distant points through a tunnel in spacetime, this new object connects two spacetime through a large mouth which is referred to as a "Cosmic Gate". In this context, two identical copies of t... |
2109.08938 | I\c{s}{\i}l Ba\c{s}aran \"Oz | I\c{s}{\i}l Ba\c{s}aran \"Oz and Kazuharu Bamba | New static cylindrical symmetric solutions in GR for unfamiliar EoS
parameter values via Noether symmetry | 6 pages, 4 figures, version accepted for publication in European
Physical Journal C | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | The solutions for the field equations of $f(R)$ gravity are investigated in
static cylindrically symmetric space-time. Conserved quantities of the system,
as well as unknown functions, can be determined with the help of the Noether
symmetry method. In this article, some unknown values of the equations of state
parame... | [
{
"created": "Sat, 18 Sep 2021 14:08:03 GMT",
"version": "v1"
}
] | 2021-09-21 | [
[
"Öz",
"Işıl Başaran",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | The solutions for the field equations of $f(R)$ gravity are investigated in static cylindrically symmetric space-time. Conserved quantities of the system, as well as unknown functions, can be determined with the help of the Noether symmetry method. In this article, some unknown values of the equations of state paramete... |
gr-qc/0701147 | Wung-Hong Huang | Wung-Hong Huang | Thermodynamics of Ideal Boson and Fermion Gases in the Static Taub
Universe | Latex 13 pages | J.Math.Phys.35:3594,1994 | 10.1063/1.530432 | null | gr-qc hep-th | null | Some thermodynamic quantities of nonrelativistic ideal boson and fermion
gases in the static Taub universe are derived to first order in a small
anisotropy parameter d which measuring the deformation from the spherical
Einstein universe. They are used to investigate the problem of how the
curvature anisotropy affects... | [
{
"created": "Sat, 27 Jan 2007 10:07:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Huang",
"Wung-Hong",
""
]
] | Some thermodynamic quantities of nonrelativistic ideal boson and fermion gases in the static Taub universe are derived to first order in a small anisotropy parameter d which measuring the deformation from the spherical Einstein universe. They are used to investigate the problem of how the curvature anisotropy affects t... |
gr-qc/0211016 | Plamen Petkov Fiziev | P.P.Fiziev, D.A.Georgieva | Inflation and Oscillations of Universe in 4D Dilatonic Gravity | 11 pages, latex, 9 figures. Accepted for publication in Physical
Review D, 2003 | Phys.Rev. D67 (2003) 064016 | 10.1103/PhysRevD.67.064016 | SU-FzF: 5/2002 | gr-qc hep-ph hep-th | null | We investigate the inflation of Universe in a model of four dimensional
dilatonic gravity with a massive dilaton field $\Phi$. The dilaton plays
simultaneously the roles of an inflation field and a quintessence field. It
yields a sequential {\em hyper}-inflation with a graceful exit to asymptotic de
Sitter space-time... | [
{
"created": "Tue, 5 Nov 2002 15:37:02 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Nov 2002 12:45:19 GMT",
"version": "v2"
},
{
"created": "Sat, 16 Nov 2002 15:10:03 GMT",
"version": "v3"
},
{
"created": "Thu, 16 Jan 2003 18:25:22 GMT",
"version": "v4"
}
] | 2009-11-07 | [
[
"Fiziev",
"P. P.",
""
],
[
"Georgieva",
"D. A.",
""
]
] | We investigate the inflation of Universe in a model of four dimensional dilatonic gravity with a massive dilaton field $\Phi$. The dilaton plays simultaneously the roles of an inflation field and a quintessence field. It yields a sequential {\em hyper}-inflation with a graceful exit to asymptotic de Sitter space-time, ... |
2307.14830 | Pujian Mao | Pujian Mao and Weicheng Zhao | Notes on no black hole theorem in three dimensional gravity | 12 pages | Nucl. Phys. B 1005 (2024) 116596 | 10.1016/j.nuclphysb.2024.116596 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we revisit the no black hole theorem in three dimensional (3D)
gravity in the Newman-Penrose formalism in a generalized Newman-Unti gauge.
After adapting the well established 4D NP formalism and its gauge and
coordinates system to 3D gravity, we show that the no black hole theorem is
manifest in the NP... | [
{
"created": "Thu, 27 Jul 2023 13:08:47 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2024 02:09:34 GMT",
"version": "v2"
}
] | 2024-06-19 | [
[
"Mao",
"Pujian",
""
],
[
"Zhao",
"Weicheng",
""
]
] | In this paper, we revisit the no black hole theorem in three dimensional (3D) gravity in the Newman-Penrose formalism in a generalized Newman-Unti gauge. After adapting the well established 4D NP formalism and its gauge and coordinates system to 3D gravity, we show that the no black hole theorem is manifest in the NP e... |
0903.0494 | Marco Valerio Battisti | Marco Valerio Battisti and Giovanni Montani | Bianchi IX in the GUP approach | 5 pages, to appear in the Proceedings of the 3rd Stueckelberg
Workshop, July 2008, Pescara - Italy | null | null | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | The Bianchi IX cosmological model (through Bianchi I and II) is analyzed in
the framework of a generalized uncertainty principle. In particular, the
anisotropies of the Universe are described by a deformed Heisenberg algebra.
Three main results are in order. (i) The Universe can not isotropize because of
the deformed... | [
{
"created": "Tue, 3 Mar 2009 11:26:29 GMT",
"version": "v1"
}
] | 2009-03-04 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Montani",
"Giovanni",
""
]
] | The Bianchi IX cosmological model (through Bianchi I and II) is analyzed in the framework of a generalized uncertainty principle. In particular, the anisotropies of the Universe are described by a deformed Heisenberg algebra. Three main results are in order. (i) The Universe can not isotropize because of the deformed K... |
1212.1577 | Farhad Darabi | T. Ghaneh, F. Darabi, H. Motavalli | Signature Change by GUP | 14 pages, to be published in IJMPD | IJMPD, Vol. 22, No. 5 (2013) 1350026 | 10.1142/S0218271813500260 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the issue of continuous signature transition from Euclidean to
Lorentzian metrics in a cosmological model described by FRW metric minimally
coupled with a self interacting massive scalar field. Then, using a
noncommutative phase space of dynamical variables deformed by Generalized
Uncertainty Principle (GU... | [
{
"created": "Fri, 7 Dec 2012 10:32:11 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Mar 2013 07:05:53 GMT",
"version": "v2"
}
] | 2013-03-19 | [
[
"Ghaneh",
"T.",
""
],
[
"Darabi",
"F.",
""
],
[
"Motavalli",
"H.",
""
]
] | We revisit the issue of continuous signature transition from Euclidean to Lorentzian metrics in a cosmological model described by FRW metric minimally coupled with a self interacting massive scalar field. Then, using a noncommutative phase space of dynamical variables deformed by Generalized Uncertainty Principle (GUP)... |
2206.15103 | Nigel Bishop | Nigel T. Bishop, Petrus J. van der Walt, Monos Naidoo | Effect of a viscous fluid shell on the propagation of gravitational
waves | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper we show that there are circumstances in which the damping of
gravitational waves (GWs) propagating through a viscous fluid can be highly
significant; in particular, this applies to Core Collapse Supernovae (CCSNe).
In previous work, we used linearized perturbations on a fixed background within
the Bondi... | [
{
"created": "Thu, 30 Jun 2022 08:09:30 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2022 06:51:51 GMT",
"version": "v2"
}
] | 2022-07-21 | [
[
"Bishop",
"Nigel T.",
""
],
[
"van der Walt",
"Petrus J.",
""
],
[
"Naidoo",
"Monos",
""
]
] | In this paper we show that there are circumstances in which the damping of gravitational waves (GWs) propagating through a viscous fluid can be highly significant; in particular, this applies to Core Collapse Supernovae (CCSNe). In previous work, we used linearized perturbations on a fixed background within the Bondi-S... |
1410.1519 | Sunil Kumar Tripathy Mr. | K. L. Mahanta and S. K. Tripathy | Cosmic Strings and Anisotropic Universe | 14 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Plane symmetric bulk viscous string cosmological models with strange quark
matter are investigated. We have incorporated bulk viscous pressure to study
its affect on the properties of the model. Assuming an anisotropic relationship
among the metric potentials, we have tried to put some constraints on the
anisotropic ... | [
{
"created": "Sat, 4 Oct 2014 11:58:25 GMT",
"version": "v1"
}
] | 2014-10-08 | [
[
"Mahanta",
"K. L.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | Plane symmetric bulk viscous string cosmological models with strange quark matter are investigated. We have incorporated bulk viscous pressure to study its affect on the properties of the model. Assuming an anisotropic relationship among the metric potentials, we have tried to put some constraints on the anisotropic pa... |
1812.10339 | Behzad Tajahmad | Behzad Tajahmad | Reconstruction of $F(T)$ gravity in homogeneous backgrounds | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A technique for the reconstruction of the potential for a scalar field in
cosmological models based on induced gravity has recently been developed by
Alexander Y. Kamenshchik, Alessandro Tronconi, and Giovanni Venturi
\cite{ref1}. In this paper, this extended reconstruction method is utilized to
investigate the natur... | [
{
"created": "Wed, 26 Dec 2018 15:16:19 GMT",
"version": "v1"
}
] | 2018-12-27 | [
[
"Tajahmad",
"Behzad",
""
]
] | A technique for the reconstruction of the potential for a scalar field in cosmological models based on induced gravity has recently been developed by Alexander Y. Kamenshchik, Alessandro Tronconi, and Giovanni Venturi \cite{ref1}. In this paper, this extended reconstruction method is utilized to investigate the nature ... |
1012.1670 | Chikun Ding | Chikun Ding, Shuai Kang, Chang-Yong Chen, Songbai Chen and Jiliang
Jing | Strong gravitational lensing in a noncommutative black-hole spacetime | 13 pages, 4 figures, 2 tables, accepted by Phys. Rev. D | Phys.Rev.D83:084005,2011 | 10.1103/PhysRevD.83.084005 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Noncommutative geometry may be a starting point to a quantum gravity. We
study the influence of the spacetime noncommutative parameter on the strong
field gravitational lensing in the noncommutative Schwarzschild black-hole
spacetime and obtain the angular position and magnification of the relativistic
images. Suppos... | [
{
"created": "Wed, 8 Dec 2010 01:55:10 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Dec 2010 00:34:27 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Feb 2011 09:19:31 GMT",
"version": "v3"
}
] | 2011-04-22 | [
[
"Ding",
"Chikun",
""
],
[
"Kang",
"Shuai",
""
],
[
"Chen",
"Chang-Yong",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | Noncommutative geometry may be a starting point to a quantum gravity. We study the influence of the spacetime noncommutative parameter on the strong field gravitational lensing in the noncommutative Schwarzschild black-hole spacetime and obtain the angular position and magnification of the relativistic images. Supposin... |
1205.1788 | Donatello Dolce | Donatello Dolce | Clockwork Quantum Universe | IV Prize, FQXi Essay Contest 2011 "Is Reality Digital or Analog?". 8
pages, minor corrections. arXiv admin note: text overlap with arXiv:1111.3319 | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by-nc-sa/3.0/ | Besides the purely digital or analog interpretation of reality there is a
third possibility which incorporates important aspects of both. This is the
cyclic formulation of elementary systems, in which elementary particles are
represented as classical strings vibrating in compact space-time dimensions
with periodic bo... | [
{
"created": "Mon, 7 May 2012 10:33:05 GMT",
"version": "v1"
}
] | 2012-05-09 | [
[
"Dolce",
"Donatello",
""
]
] | Besides the purely digital or analog interpretation of reality there is a third possibility which incorporates important aspects of both. This is the cyclic formulation of elementary systems, in which elementary particles are represented as classical strings vibrating in compact space-time dimensions with periodic boun... |
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