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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1405.4038 | Leandro A. Oliveira | Leandro A. Oliveira, Vitor Cardoso, Lu\'is C. B. Crispino | Ergoregion instability: The hydrodynamic vortex | 10 pages, 8 figures, 2 tables | Phys. Rev. D 89, 124008 (2014) | 10.1103/PhysRevD.89.124008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Four-dimensional, asymptotically flat spacetimes with an ergoregion but no
horizon have been shown to be linearly unstable against a
superradiant-triggered mechanism. This result has wide implications in the
search for astrophysically viable alternatives to black holes, but also in the
understanding of black holes an... | [
{
"created": "Fri, 16 May 2014 00:24:16 GMT",
"version": "v1"
}
] | 2014-06-10 | [
[
"Oliveira",
"Leandro A.",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Four-dimensional, asymptotically flat spacetimes with an ergoregion but no horizon have been shown to be linearly unstable against a superradiant-triggered mechanism. This result has wide implications in the search for astrophysically viable alternatives to black holes, but also in the understanding of black holes and ... |
1101.1030 | Dinesh Singh | Dinesh Singh, Nader Mobed | Local Space-Time Curvature Effects on Quantum Orbital Angular Momentum | 21 pages, 1 figure; references added; accepted for publication in
Classical and Quantum Gravity | Class.Quant.Grav.28:105024,2011 | 10.1088/0264-9381/28/10/105024 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper claims that local space-time curvature can non-trivially
contribute to the properties of orbital angular momentum in quantum mechanics.
Of key importance is the demonstration that an extended orbital angular
momentum operator due to gravitation can identify the existence of orbital
states with half-integer... | [
{
"created": "Wed, 5 Jan 2011 17:12:30 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Apr 2011 16:32:30 GMT",
"version": "v2"
}
] | 2011-04-28 | [
[
"Singh",
"Dinesh",
""
],
[
"Mobed",
"Nader",
""
]
] | This paper claims that local space-time curvature can non-trivially contribute to the properties of orbital angular momentum in quantum mechanics. Of key importance is the demonstration that an extended orbital angular momentum operator due to gravitation can identify the existence of orbital states with half-integer p... |
1809.01781 | Hyerim Noh | Jai-chan Hwang, Hyerim Noh, Chan-Gyung Park, Da-Hee Lee | Perturbation initial conditions for a couple of dark energy scalar field
potentials | 7 pages, 5 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present perturbation initial conditions for two types of scalar field
potential often used in the dark energy study: one inverse power-law and the
other exponential. The solutions are presented in the presence of the $w =$
constant fluid ($w = 1/3$ for radiation fluid), a minimally coupled scalar
field and a sub-d... | [
{
"created": "Thu, 6 Sep 2018 01:23:13 GMT",
"version": "v1"
}
] | 2018-09-07 | [
[
"Hwang",
"Jai-chan",
""
],
[
"Noh",
"Hyerim",
""
],
[
"Park",
"Chan-Gyung",
""
],
[
"Lee",
"Da-Hee",
""
]
] | We present perturbation initial conditions for two types of scalar field potential often used in the dark energy study: one inverse power-law and the other exponential. The solutions are presented in the presence of the $w =$ constant fluid ($w = 1/3$ for radiation fluid), a minimally coupled scalar field and a sub-dom... |
0812.2811 | J\"org Hennig | J\"org Hennig, Carla Cederbaum, and Marcus Ansorg | A universal inequality for axisymmetric and stationary black holes with
surrounding matter in the Einstein-Maxwell theory | 20 pages | Commun.Math.Phys.293:449-467,2010 | 10.1007/s00220-009-0889-y | null | gr-qc astro-ph math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that in Einstein-Maxwell theory the inequality $(8\pi J)^2+(4\pi
Q^2)^2 < A^2$ holds for any sub-extremal axisymmetric and stationary black hole
with arbitrary surrounding matter. Here $J, Q$, and $A$ are angular momentum,
electric charge, and horizon area of the black hole, respectively.
| [
{
"created": "Mon, 15 Dec 2008 14:17:43 GMT",
"version": "v1"
}
] | 2009-12-04 | [
[
"Hennig",
"Jörg",
""
],
[
"Cederbaum",
"Carla",
""
],
[
"Ansorg",
"Marcus",
""
]
] | We prove that in Einstein-Maxwell theory the inequality $(8\pi J)^2+(4\pi Q^2)^2 < A^2$ holds for any sub-extremal axisymmetric and stationary black hole with arbitrary surrounding matter. Here $J, Q$, and $A$ are angular momentum, electric charge, and horizon area of the black hole, respectively. |
2111.03870 | Mateja Bo\v{s}kovi\'c | Mateja Bo\v{s}kovi\'c, Enrico Barausse | Soliton boson stars, Q-balls and the causal Buchdahl bound | 19+5 pages, 17 figures; v2: minor edits + few references added to
match the published version | JCAP02(2022)032 | 10.1088/1475-7516/2022/02/032 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Self-gravitating non-topological solitons whose potential admits multiple
vacua are promising candidates for exotic compact objects. Such objects can
arise in several extensions of the Standard Model and could be produced in the
early Universe. In this work, we focus on objects made from complex scalars
(gravitating ... | [
{
"created": "Sat, 6 Nov 2021 12:33:37 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2022 12:14:52 GMT",
"version": "v2"
}
] | 2022-02-22 | [
[
"Bošković",
"Mateja",
""
],
[
"Barausse",
"Enrico",
""
]
] | Self-gravitating non-topological solitons whose potential admits multiple vacua are promising candidates for exotic compact objects. Such objects can arise in several extensions of the Standard Model and could be produced in the early Universe. In this work, we focus on objects made from complex scalars (gravitating Q-... |
2404.19216 | Jieci Wang | Qianqian Liu, Tonghua Liu, Cuihong Wen, Jieci Wang | Optimal quantum strategy for locating Unruh channels | 15 pages, 6 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the perspective of quantum information theory, the effect of Unruh
radiation on a two-level accelerated detector can be modeled as a quantum
channel. In this work, we employ the tools of channel-position finding to
locate Unruh channels. The signal-idler and idler-free protocols are explored
to determine the pos... | [
{
"created": "Tue, 30 Apr 2024 02:33:37 GMT",
"version": "v1"
}
] | 2024-05-01 | [
[
"Liu",
"Qianqian",
""
],
[
"Liu",
"Tonghua",
""
],
[
"Wen",
"Cuihong",
""
],
[
"Wang",
"Jieci",
""
]
] | From the perspective of quantum information theory, the effect of Unruh radiation on a two-level accelerated detector can be modeled as a quantum channel. In this work, we employ the tools of channel-position finding to locate Unruh channels. The signal-idler and idler-free protocols are explored to determine the posit... |
1905.00900 | Josu\'e Motoa-Manzano | Juan P. Beltr\'an Almeida, Josu\'e Motoa-Manzano and C\'esar A.
Valenzuela-Toledo | Correlation functions of sourced gravitational waves in inflationary
scalar vector models. A symmetry based approach | Typos corrected, some clarifying comments added and references added.
Matches the published version | JHEP09(2019)118 | 10.1007/JHEP09(2019)118 | PI/UAN-2019-648FT | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use conformal symmetry to constrain the shape of inflationary correlators
in the presence of long-lived vector field perturbations. Applying conformal
Ward identities, we derive general expressions, up to amplitudes and
normalization factors, for the two and three point correlators in the presence
of vector fields... | [
{
"created": "Thu, 2 May 2019 16:24:11 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 17:29:29 GMT",
"version": "v2"
}
] | 2019-09-24 | [
[
"Almeida",
"Juan P. Beltrán",
""
],
[
"Motoa-Manzano",
"Josué",
""
],
[
"Valenzuela-Toledo",
"César A.",
""
]
] | We use conformal symmetry to constrain the shape of inflationary correlators in the presence of long-lived vector field perturbations. Applying conformal Ward identities, we derive general expressions, up to amplitudes and normalization factors, for the two and three point correlators in the presence of vector fields m... |
gr-qc/9211027 | null | E. Calzetta and C. El Hasi | Chaotic Friedmann-Robertson-Walker Cosmology | 28 pages, 11 figures | Class.Quant.Grav.10:1825-1842,1993 | 10.1088/0264-9381/10/9/022 | GTCRG 92-10 | gr-qc | null | We show that the dynamics of a spatially closed Friedmann - Robertson -
Walker Universe conformally coupled to a real, free, massive scalar field, is
chaotic, for large enough field amplitudes. We do so by proving that this
system is integrable under the adiabatic approximation, but that the
corresponding KAM tori br... | [
{
"created": "Mon, 23 Nov 1992 18:25:53 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Calzetta",
"E.",
""
],
[
"Hasi",
"C. El",
""
]
] | We show that the dynamics of a spatially closed Friedmann - Robertson - Walker Universe conformally coupled to a real, free, massive scalar field, is chaotic, for large enough field amplitudes. We do so by proving that this system is integrable under the adiabatic approximation, but that the corresponding KAM tori brea... |
gr-qc/0604012 | Yosef Zlochower | M. Campanelli, C. O. Lousto, Y. Zlochower | Spinning-black-hole binaries: The orbital hang up | 5 pages, 5 figures, revtex4. New version accepted for publication in
Physical Review D Rapid Communications | Phys.Rev.D74:041501,2006 | 10.1103/PhysRevD.74.041501 | null | gr-qc astro-ph | null | We present the first fully-nonlinear numerical study of the dynamics of
highly spinning black-hole binaries. We evolve binaries from quasicircular
orbits (as inferred from Post-Newtonian theory), and find that the last stages
of the orbital motion of black-hole binaries are profoundly affected by their
individual spi... | [
{
"created": "Tue, 4 Apr 2006 18:19:20 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jul 2006 20:11:23 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Campanelli",
"M.",
""
],
[
"Lousto",
"C. O.",
""
],
[
"Zlochower",
"Y.",
""
]
] | We present the first fully-nonlinear numerical study of the dynamics of highly spinning black-hole binaries. We evolve binaries from quasicircular orbits (as inferred from Post-Newtonian theory), and find that the last stages of the orbital motion of black-hole binaries are profoundly affected by their individual spins... |
1707.06101 | Neil J. Cornish | Neil Cornish, Diego Blas and Germano Nardini | Bounding the speed of gravity with gravitational wave observations | Version published in PRL. 5 pages, 3 figures | Phys. Rev. Lett. 119, 161102 (2017) | 10.1103/PhysRevLett.119.161102 | CERN-TH-2017-140 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The time delay between gravitational wave signals arriving at widely
separated detectors can be used to place upper and lower bounds on the speed of
gravitational wave propagation. Using a Bayesian approach that combines the
first three gravitational wave detections reported by the LIGO collaboration we
constrain the... | [
{
"created": "Wed, 19 Jul 2017 14:01:37 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Oct 2017 17:45:30 GMT",
"version": "v2"
}
] | 2017-10-25 | [
[
"Cornish",
"Neil",
""
],
[
"Blas",
"Diego",
""
],
[
"Nardini",
"Germano",
""
]
] | The time delay between gravitational wave signals arriving at widely separated detectors can be used to place upper and lower bounds on the speed of gravitational wave propagation. Using a Bayesian approach that combines the first three gravitational wave detections reported by the LIGO collaboration we constrain the g... |
1709.06450 | Allan Alinea | Allan L. Alinea, Takahiro Kubota | Adiabatic regularization of power spectrum in nonminimally coupled
general single-field inflation | version 3.0, edited Section I on emergence of adiabatic
regularization of power spectrum and Section III on scale invariance,
corrected minor errors in some equations | Phys. Rev. D 97, 063513 (2018) | 10.1103/PhysRevD.97.063513 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform adiabatic regularization of power spectrum in nonminimally coupled
general single-field inflation with varying speed of sound. The subtraction is
performed within the framework of earlier study by Urakawa and Starobinsky
dealing with the canonical inflation. Inspired by Fakir and Unruh's model on
nonminima... | [
{
"created": "Mon, 18 Sep 2017 12:39:08 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2017 15:13:44 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Dec 2017 07:23:55 GMT",
"version": "v3"
}
] | 2018-03-15 | [
[
"Alinea",
"Allan L.",
""
],
[
"Kubota",
"Takahiro",
""
]
] | We perform adiabatic regularization of power spectrum in nonminimally coupled general single-field inflation with varying speed of sound. The subtraction is performed within the framework of earlier study by Urakawa and Starobinsky dealing with the canonical inflation. Inspired by Fakir and Unruh's model on nonminimall... |
2005.10991 | Angel Rincon | Angel Rincon, Ernesto Contreras, Francisco Tello-Ortiz, Pedro
Bargue\~no and Gabriel Abell\'an | Anisotropic 2+1 dimensional black holes by gravitational decoupling | 8 pages, 3 figures, accepted for publication in EPJ C | null | 10.1140/epjc/s10052-020-8071-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we analyze the well-known 2+1 dimensional black holes
(assuming a non-vanishing cosmological constant) in light of the gravitational
decoupling by the minimal geometric deformation approach. To illustrate our
results, we consider the BTZ geometry as the seed solution to generate new
anisotropic ... | [
{
"created": "Fri, 22 May 2020 03:57:15 GMT",
"version": "v1"
}
] | 2020-06-24 | [
[
"Rincon",
"Angel",
""
],
[
"Contreras",
"Ernesto",
""
],
[
"Tello-Ortiz",
"Francisco",
""
],
[
"Bargueño",
"Pedro",
""
],
[
"Abellán",
"Gabriel",
""
]
] | In the present paper, we analyze the well-known 2+1 dimensional black holes (assuming a non-vanishing cosmological constant) in light of the gravitational decoupling by the minimal geometric deformation approach. To illustrate our results, we consider the BTZ geometry as the seed solution to generate new anisotropic on... |
1008.2679 | Muhammad Sharif | M. Sharif and Sundas Fatima | Charged Cylindrical Collapse of Anisotropic Fluid | 19 pages, accepted for publication in Gen. Relativ. Grav | Gen.Rel.Grav.43:127-142,2011 | 10.1007/s10714-010-1076-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following the scheme developed by Misner and Sharp, we discuss the dynamics
of gravitational collapse. For this purpose, an interior cylindrically
symmetric spacetime is matched to an exterior charged static cylindrically
symmetric spacetime using the Darmois matching conditions. Dynamical equations
are obtained with... | [
{
"created": "Fri, 13 Aug 2010 04:22:58 GMT",
"version": "v1"
}
] | 2011-02-11 | [
[
"Sharif",
"M.",
""
],
[
"Fatima",
"Sundas",
""
]
] | Following the scheme developed by Misner and Sharp, we discuss the dynamics of gravitational collapse. For this purpose, an interior cylindrically symmetric spacetime is matched to an exterior charged static cylindrically symmetric spacetime using the Darmois matching conditions. Dynamical equations are obtained with m... |
gr-qc/9809030 | Roh Suan Tung | R. S. Tung (Lancaster University) and J. M. Nester (National Central
University) | The quadratic spinor Lagrangian is equivalent to the teleparallel theory | 10 pages, RevTeX | Phys.Rev.D60:021501,1999 | 10.1103/PhysRevD.60.021501 | null | gr-qc | null | The quadratic spinor Lagrangian is shown to be equivalent to the teleparallel
/ tetrad representation of Einstein's theory. An important consequence is that
the energy-momentum density obtained from this quadratic spinor Lagrangian is
essentially the same as the ``tensor'' proposed by Moller in 1961.
| [
{
"created": "Mon, 7 Sep 1998 20:43:40 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Mar 1999 19:50:30 GMT",
"version": "v2"
}
] | 2009-12-30 | [
[
"Tung",
"R. S.",
"",
"Lancaster University"
],
[
"Nester",
"J. M.",
"",
"National Central\n University"
]
] | The quadratic spinor Lagrangian is shown to be equivalent to the teleparallel / tetrad representation of Einstein's theory. An important consequence is that the energy-momentum density obtained from this quadratic spinor Lagrangian is essentially the same as the ``tensor'' proposed by Moller in 1961. |
gr-qc/0201043 | Pavel Klepac | P. Klepac | On spacetimes with 3-parameter isometry group in string-inspired theory
of gravity | 9 pages, LaTeX 2e | null | null | null | gr-qc | null | Cylindrically symmetric stationary spacetimes are examined in the framework
of string-inpired generalized theory of gravity. In four dimensions this theory
contains a dilatonic scalar field in addition to gravity. A charged perfect
fluid representing fermionic matter is also considered. Explicit solution is
given and... | [
{
"created": "Sun, 13 Jan 2002 11:56:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Klepac",
"P.",
""
]
] | Cylindrically symmetric stationary spacetimes are examined in the framework of string-inpired generalized theory of gravity. In four dimensions this theory contains a dilatonic scalar field in addition to gravity. A charged perfect fluid representing fermionic matter is also considered. Explicit solution is given and a... |
gr-qc/0011036 | Robert Beig | R. Beig, M. Karadi | On unbounded bodies with finite mass: asymptotic behaviour | 6 pages | Class.Quant.Grav. 18 (2001) 671-676 | 10.1088/0264-9381/18/4/307 | UWThPh-2000-35 | gr-qc | null | There is introduced a class of barotropic equations of state (EOS) which
become polytropic of index $n = 5$ at low pressure. One then studies
asymptotically flat solutions of the static Einstein equations coupled to
perfect fluids having such an EOS. It is shown that such solutions, in the same
manner as the vacuum o... | [
{
"created": "Fri, 10 Nov 2000 15:12:26 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Beig",
"R.",
""
],
[
"Karadi",
"M.",
""
]
] | There is introduced a class of barotropic equations of state (EOS) which become polytropic of index $n = 5$ at low pressure. One then studies asymptotically flat solutions of the static Einstein equations coupled to perfect fluids having such an EOS. It is shown that such solutions, in the same manner as the vacuum one... |
0901.0302 | Drew Keppel | LIGO Scientific Collaboration: B. Abbott, et al | Search for Gravitational Waves from Low Mass Binary Coalescences in the
First Year of LIGO's S5 Data | 15 pages, 5 figures, 2 tables; changes associated with referee
comments, inclusion of recent LIGO calibration data, fixing small error in
upper limit calculation | Phys.Rev.D79:122001,2009 | 10.1103/PhysRevD.79.122001 | LIGO-P080095-v4 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have searched for gravitational waves from coalescing low mass compact
binary systems with a total mass between 2 and 35 Msun and a minimum component
mass of 1 Msun using data from the first year of the fifth science run (S5) of
the three LIGO detectors, operating at design sensitivity. Depending on mass,
we are s... | [
{
"created": "Mon, 5 Jan 2009 14:11:38 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 2009 19:57:20 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Mar 2009 21:29:01 GMT",
"version": "v3"
},
{
"created": "Wed, 6 May 2009 23:10:02 GMT",
"version": "v4"
}
] | 2009-06-30 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"Abbott",
"B.",
""
]
] | We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2 and 35 Msun and a minimum component mass of 1 Msun using data from the first year of the fifth science run (S5) of the three LIGO detectors, operating at design sensitivity. Depending on mass, we are sen... |
gr-qc/0607045 | Barry Holstein | Barry R. Holstein | Graviton Physics | 25 page latex file, to be publshed in the American Journal of Physics | Am.J.Phys. 74 (2006) 1002-1011 | 10.1119/1.2338547 | null | gr-qc hep-ph | null | The interactions of gravitons with matter are calculated in parallel with the
familiar photon case. It is shown that graviton scattering amplitudes can be
factorized into a product of familiar electromagnetic forms, and cross sections
for various reactions are straightforwardly evaluated using helicity methods.
| [
{
"created": "Tue, 11 Jul 2006 15:40:23 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Holstein",
"Barry R.",
""
]
] | The interactions of gravitons with matter are calculated in parallel with the familiar photon case. It is shown that graviton scattering amplitudes can be factorized into a product of familiar electromagnetic forms, and cross sections for various reactions are straightforwardly evaluated using helicity methods. |
2203.10628 | Douglas A. Singleton | Michael Bishop, Joey Contreras, and Douglas Singleton | A Subtle Aspect of Minimal Lengths in the Generalized Uncertainty
Principle | 14 pages, 3 figures. Published in Universe | Universe 2022, 8(3), 192 | 10.3390/universe8030192 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we point out an overlooked and subtle feature of the
generalized uncertainty principle (GUP) approach to quantizing gravity: namely
that different pairs of modified operators with the same modified commutator,
$[\hat{X},\hat{P}] = i \hbar (1+\beta p^2)$, may have different physical
consequences such as ... | [
{
"created": "Sun, 20 Mar 2022 19:02:02 GMT",
"version": "v1"
}
] | 2022-03-22 | [
[
"Bishop",
"Michael",
""
],
[
"Contreras",
"Joey",
""
],
[
"Singleton",
"Douglas",
""
]
] | In this work, we point out an overlooked and subtle feature of the generalized uncertainty principle (GUP) approach to quantizing gravity: namely that different pairs of modified operators with the same modified commutator, $[\hat{X},\hat{P}] = i \hbar (1+\beta p^2)$, may have different physical consequences such as ha... |
1602.01266 | Elena Kopteva | Pavlina Jaluvkova, Elena Kopteva, Zdenek Stuchlik | The model of the black hole enclosed in dust. The flat space case | 9 pages, 4 figures | General Relativity and Gravitation, Volume 49, Issue 6, article
id.80, 9 pp. 2017 | 10.1007/s10714-017-2243-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work the model is constructed to describe the black hole enclosed in
the dust cosmological background in case of zero spatial curvature. This model
is based on our exact solution of the class of LTB inhomogeneous solutions. We
considered the properties of the model and built the R-T-structure of the
resulting... | [
{
"created": "Wed, 3 Feb 2016 11:07:35 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Feb 2016 18:16:54 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Jun 2016 14:13:41 GMT",
"version": "v3"
},
{
"created": "Wed, 27 Jul 2016 10:11:08 GMT",
"version": "v4"
},
{
"cr... | 2017-11-29 | [
[
"Jaluvkova",
"Pavlina",
""
],
[
"Kopteva",
"Elena",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | In this work the model is constructed to describe the black hole enclosed in the dust cosmological background in case of zero spatial curvature. This model is based on our exact solution of the class of LTB inhomogeneous solutions. We considered the properties of the model and built the R-T-structure of the resulting s... |
2007.12471 | Kazuharu Bamba | Riasat Ali, Kazuharu Bamba, Muhammad Asgher, M.F. Malik and Syed Asif
Ali Shah | Stability Analysis of Charged Rotating Black Ring | 7 pages, 2 figures, version accepted for publication in Symmetry | Symmetry 12 (2020), 1165 | 10.3390/sym12071165 | FU-PCG-79 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the electromagnetic field equation along with the WKB approximation.
The boson tunneling phenomenon from charged rotating black ring(CRBR) is
analyzed. It is examined that reserve radiation consistent with CRBR can be
computed in general by neglecting back reaction and self-gravitational of the
radiated boso... | [
{
"created": "Wed, 22 Jul 2020 13:19:51 GMT",
"version": "v1"
}
] | 2020-07-27 | [
[
"Ali",
"Riasat",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Asgher",
"Muhammad",
""
],
[
"Malik",
"M. F.",
""
],
[
"Shah",
"Syed Asif Ali",
""
]
] | We study the electromagnetic field equation along with the WKB approximation. The boson tunneling phenomenon from charged rotating black ring(CRBR) is analyzed. It is examined that reserve radiation consistent with CRBR can be computed in general by neglecting back reaction and self-gravitational of the radiated boson ... |
1108.5886 | Heeseung Zoe | Sungwook E. Hong, Young Jae Lee and Heeseung Zoe | The Possibility of Inflation in Asymptotically Safe Gravity | 14 pages, 4 figures | Int. J. Mod. Phys. D 21, 1250062 (2012) | 10.1142/S0218271812500629 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the inflationary modes in the cubic curvature theories in the
context of asymptotically safe gravity. On the phase space of the Hubble
parameter, there exists a critical point which corresponds to the slow-roll
inflation in Einstein frame. Most of the e-foldings are attained around the
critical point for e... | [
{
"created": "Tue, 30 Aug 2011 09:16:09 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Feb 2012 14:01:04 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jun 2012 03:29:14 GMT",
"version": "v3"
}
] | 2012-08-09 | [
[
"Hong",
"Sungwook E.",
""
],
[
"Lee",
"Young Jae",
""
],
[
"Zoe",
"Heeseung",
""
]
] | We examine the inflationary modes in the cubic curvature theories in the context of asymptotically safe gravity. On the phase space of the Hubble parameter, there exists a critical point which corresponds to the slow-roll inflation in Einstein frame. Most of the e-foldings are attained around the critical point for eac... |
0802.3263 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Quadratic superconducting cosmic strings revisited | 6 pages | Europhys.Lett.81:60003,2008 | 10.1209/0295-5075/81/60003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that 5-dimensional general relativity action extended by
appropriate quadratic terms admits a singular superconducting cosmic string
solution. We search for cosmic strings endowed with similar and extended
physical properties by directly integrating the non-linear matrix field
equations thus avoidin... | [
{
"created": "Fri, 22 Feb 2008 07:20:53 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | It has been shown that 5-dimensional general relativity action extended by appropriate quadratic terms admits a singular superconducting cosmic string solution. We search for cosmic strings endowed with similar and extended physical properties by directly integrating the non-linear matrix field equations thus avoiding ... |
gr-qc/9406025 | Jerzy Lewandowski | Jerzy Lewandowski | Topological Measure and Graph-Differential Geometry on the Quotient
Space of Connections | 3 pp., Proceedings of ``Journees Relativistes 1993'' | Int.J.Mod.Phys.D3:207-210,1994 | 10.1142/S0218271894000307 | null | gr-qc | null | (This is a report for the Proceedings of ``Journees Relativistes 1993''
written in September 1993. Containes a short description of the results
published elsewhere in the joint paper with A. Ashtekar) Integral calculus on
the space of gauge equivalent connections is developed. By carring out a
non-linear generalizati... | [
{
"created": "Thu, 16 Jun 1994 13:47:17 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Lewandowski",
"Jerzy",
""
]
] | (This is a report for the Proceedings of ``Journees Relativistes 1993'' written in September 1993. Containes a short description of the results published elsewhere in the joint paper with A. Ashtekar) Integral calculus on the space of gauge equivalent connections is developed. By carring out a non-linear generalization... |
1008.2001 | Carlos O. Lousto | Gabriela Jaramillo and Carlos O. Lousto | Study of multi black hole and ring singularity apparent horizons | 31 pages, 21 figures | null | 10.1103/PhysRevD.84.104011 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study critical black hole separations for the formation of a common
apparent horizon in systems of $N$ - black holes in a time symmetric
configuration. We study in detail the aligned equal mass cases for $N=2,3,4,5$,
and relate them to the unequal mass binary black hole case. We then study the
apparent horizon of ... | [
{
"created": "Wed, 11 Aug 2010 20:31:58 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Jaramillo",
"Gabriela",
""
],
[
"Lousto",
"Carlos O.",
""
]
] | We study critical black hole separations for the formation of a common apparent horizon in systems of $N$ - black holes in a time symmetric configuration. We study in detail the aligned equal mass cases for $N=2,3,4,5$, and relate them to the unequal mass binary black hole case. We then study the apparent horizon of th... |
2212.06883 | Bivudutta Mishra Dr. | Francisco Tello-Ortiz, B.Mishra, A. Alvarez, Ksh. Newton Singh | Minimally deformed wormholes inspired by noncommutative geometry | 20 pages, 6 figures. Accepted Version Fortschritte der physik | Fortschr. Phys.,71, 2200108, 2023 | 10.1002/prop.202200108 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, new wormhole solutions in the framework of General
Relativity are presented. Taking advantage of gravitational decoupling by means
of minimal geometric deformation approach and, the so-called noncommutative
geometry Gaussian and Lorentzian density profiles, the seminal Morris-Thorne
space-time is min... | [
{
"created": "Wed, 7 Dec 2022 09:50:12 GMT",
"version": "v1"
}
] | 2023-06-02 | [
[
"Tello-Ortiz",
"Francisco",
""
],
[
"Mishra",
"B.",
""
],
[
"Alvarez",
"A.",
""
],
[
"Singh",
"Ksh. Newton",
""
]
] | In this article, new wormhole solutions in the framework of General Relativity are presented. Taking advantage of gravitational decoupling by means of minimal geometric deformation approach and, the so-called noncommutative geometry Gaussian and Lorentzian density profiles, the seminal Morris-Thorne space-time is minim... |
gr-qc/9603037 | Julio Cesar Fabris | Kirill A. Bronnikov and Julio C. Fabris (Universidade Federal do
Espirito Santo - Vitoria - Espirito Santo - Brazil) | Ring Wormholes in D-Dimensional Einstein and Dilaton Gravity | Latex file, 15 pages | null | 10.1088/0264-9381/14/4/003 | DF-UFES/96 | gr-qc | null | On the basis of exact solutions to the Einstein-Abelian gauge-dilaton
equations in $D$-dimensional gravity, the properties of static axial
configurations are discussed. Solutions free of curvature singularities are
selected; they can be attributed to traversible wormholes with cosmic
string-like singularities at thei... | [
{
"created": "Fri, 22 Mar 1996 19:25:01 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Bronnikov",
"Kirill A.",
"",
"Universidade Federal do\n Espirito Santo - Vitoria - Espirito Santo - Brazil"
],
[
"Fabris",
"Julio C.",
"",
"Universidade Federal do\n Espirito Santo - Vitoria - Espirito Santo - Brazil"
]
] | On the basis of exact solutions to the Einstein-Abelian gauge-dilaton equations in $D$-dimensional gravity, the properties of static axial configurations are discussed. Solutions free of curvature singularities are selected; they can be attributed to traversible wormholes with cosmic string-like singularities at their ... |
2405.19122 | Thomas M\"adler | Thomas M\"adler, Olaf Baake, Hamideh Hosseini, Jeffrey Winicour | Apparent horizon tracking in supercritical solutions of the
Einstein-scalar field equations in spherical symmetry in affine-null
coordinates | 14 pages, 13 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Choptuik's critical phenomena in general relativity is revisited in the
affine-null metric formulation of Einstein's equations for a massless scalar
field in spherical symmetry. Numerical solutions are obtained by evolution of
initial data using pseudo-spectral methods. The underlying system consists of
differential ... | [
{
"created": "Wed, 29 May 2024 14:28:17 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2024 03:16:43 GMT",
"version": "v2"
}
] | 2024-07-26 | [
[
"Mädler",
"Thomas",
""
],
[
"Baake",
"Olaf",
""
],
[
"Hosseini",
"Hamideh",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | Choptuik's critical phenomena in general relativity is revisited in the affine-null metric formulation of Einstein's equations for a massless scalar field in spherical symmetry. Numerical solutions are obtained by evolution of initial data using pseudo-spectral methods. The underlying system consists of differential eq... |
1903.02370 | Andronikos Paliathanasis | Andronikos Paliathanasis, Supriya Pan and Weiqiang Yang | Dynamics of nonlinear interacting dark energy models | 15 pages, 10 figures | International Journal of Modern Physics D Vol. 28, No. 12, 1950161
(2019) | 10.1142/S021827181950161X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological dynamics of interacting dark energy models in
which the interaction function is a nonlinear in terms of the energy densities.
Considering explicitly the interaction between a pressureless dark matter and a
scalar field, minimally coupled to Einstein gravity, we explore the dynamics of
... | [
{
"created": "Wed, 6 Mar 2019 13:38:45 GMT",
"version": "v1"
}
] | 2020-01-17 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Pan",
"Supriya",
""
],
[
"Yang",
"Weiqiang",
""
]
] | We investigate the cosmological dynamics of interacting dark energy models in which the interaction function is a nonlinear in terms of the energy densities. Considering explicitly the interaction between a pressureless dark matter and a scalar field, minimally coupled to Einstein gravity, we explore the dynamics of th... |
2107.10550 | Soma Heydari | Soma Heydari and Kayoomars Karami | Primordial black holes in nonminimal derivative coupling inflation with
quartic potential and reheating consideration | 32 pages, 6 figures | Eur. Phys. J. C 82, 83 (2022) | 10.1140/epjc/s10052-022-10036-2 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We investigate the generation of Primordial Black Holes (PBHs) with the aid
of gravitationally increased friction mechanism originated from the NonMinimal
field Derivative Coupling (NMDC) to gravity framework, with the quartic
potential. Applying the coupling parameter as a two-parted function of inflaton
field and f... | [
{
"created": "Thu, 22 Jul 2021 10:07:27 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Feb 2022 07:45:13 GMT",
"version": "v2"
}
] | 2022-02-02 | [
[
"Heydari",
"Soma",
""
],
[
"Karami",
"Kayoomars",
""
]
] | We investigate the generation of Primordial Black Holes (PBHs) with the aid of gravitationally increased friction mechanism originated from the NonMinimal field Derivative Coupling (NMDC) to gravity framework, with the quartic potential. Applying the coupling parameter as a two-parted function of inflaton field and fin... |
2209.12589 | Krinio Marouda | Vitor Cardoso, David Hilditch, Krinio Marouda, Jos\'e Nat\'ario,
Ulrich Sperhake | Curvature and dynamical spacetimes: can we peer into the quantum regime? | 8 pages, 5 figures | null | 10.1088/1361-6382/acb9cd | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stationary compact astrophysical objects such as black holes and neutron
stars behave as classical systems from the gravitational point of view. Their
(observable) curvature is everywhere "small". Here we investigate whether
mergers of such objects, or other strongly dynamical spacetimes such as
collapsing configurat... | [
{
"created": "Mon, 26 Sep 2022 11:18:14 GMT",
"version": "v1"
}
] | 2023-03-08 | [
[
"Cardoso",
"Vitor",
""
],
[
"Hilditch",
"David",
""
],
[
"Marouda",
"Krinio",
""
],
[
"Natário",
"José",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | Stationary compact astrophysical objects such as black holes and neutron stars behave as classical systems from the gravitational point of view. Their (observable) curvature is everywhere "small". Here we investigate whether mergers of such objects, or other strongly dynamical spacetimes such as collapsing configuratio... |
1004.5162 | Zhao Ren | Zhao Ren Zhao, Huai Fan Li, Li-Chun Zhang, Yue-qin Wu | Hawking radiation and entropy in de Sitter spacetime | 12 pages,Accepted for publication in Astrophysics & Space Science | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the analytic extension method, we study Hawking radiation of an $(n +
4)$-dimensional Schwarzschild-de Sitter black hole. Under the condition that
the total energy is conserved, taking the reaction of the radiation of
particles to the spacetime into consideration and considering the relation
between the black h... | [
{
"created": "Wed, 28 Apr 2010 23:16:59 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Zhao",
"Zhao Ren",
""
],
[
"Li",
"Huai Fan",
""
],
[
"Zhang",
"Li-Chun",
""
],
[
"Wu",
"Yue-qin",
""
]
] | Using the analytic extension method, we study Hawking radiation of an $(n + 4)$-dimensional Schwarzschild-de Sitter black hole. Under the condition that the total energy is conserved, taking the reaction of the radiation of particles to the spacetime into consideration and considering the relation between the black hol... |
0707.4625 | Dr. Bikash Chandra Paul | B. C. Paul, P. Thakur and A. Saha | Holographic Dark Energy Model with Modified Generalized Chaplygin Gas | 15 Pages, 1 figure | null | null | null | gr-qc | null | We present a holographic dark energy model of the universe considering
modified generalized Chaplygin gas (GCG). The modified GCG behaves as an
ordinary barotropic fluid in the early epoch when the universe was tiny but
behaves subsequently as a $\Lambda$CDM model at late epoch. An equivalent model
with scalar field ... | [
{
"created": "Tue, 31 Jul 2007 14:21:37 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Nov 2007 09:09:47 GMT",
"version": "v2"
}
] | 2007-11-21 | [
[
"Paul",
"B. C.",
""
],
[
"Thakur",
"P.",
""
],
[
"Saha",
"A.",
""
]
] | We present a holographic dark energy model of the universe considering modified generalized Chaplygin gas (GCG). The modified GCG behaves as an ordinary barotropic fluid in the early epoch when the universe was tiny but behaves subsequently as a $\Lambda$CDM model at late epoch. An equivalent model with scalar field is... |
2001.00556 | Shahram Jalalzadeh | S. Jalalzadeh, M. Rashki and S. Abarghouei Nejad | Classical Universe Arising from Quantum Cosmology | 11 pages, 3 figure, to appear in Physics of the Dark Universe | Phys. Dark Universe, 30, 100741 (2020) | 10.1016/j.dark.2020.100741 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the classical limit and unitary evolution of quantum
cosmology by applying the Weyl--Wigner--Groenewold--Moyal formalism of
deformation quantization to quantum cosmology of a homogeneous and isotropic
universe with positive spatial curvature and conformally coupled scalar field.
The correspond... | [
{
"created": "Thu, 2 Jan 2020 18:40:20 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jan 2020 02:53:43 GMT",
"version": "v2"
},
{
"created": "Sat, 31 Oct 2020 12:45:46 GMT",
"version": "v3"
}
] | 2020-11-06 | [
[
"Jalalzadeh",
"S.",
""
],
[
"Rashki",
"M.",
""
],
[
"Nejad",
"S. Abarghouei",
""
]
] | In this paper, we study the classical limit and unitary evolution of quantum cosmology by applying the Weyl--Wigner--Groenewold--Moyal formalism of deformation quantization to quantum cosmology of a homogeneous and isotropic universe with positive spatial curvature and conformally coupled scalar field. The correspondin... |
1810.01283 | Dr. Sudhaker Upadhyay | Sudhaker Upadhyay | Leading-order corrections to charged rotating AdS black holes
thermodynamics | 10 pages, 14 captioned figures, published in General Relativity and
Gravitation | General Relativity and Gravitation (2018) 50:128 | 10.1007/s10714-018-2459-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a charged rotating AdS black holes in four
dimensions and study the effects of leading-order thermal corrections on the
thermodynamics of such system explicitly. The first-order corrected
thermodynamical quantities also satisfy the first-law of thermodynamics of the
black holes. The hologra... | [
{
"created": "Mon, 1 Oct 2018 06:48:40 GMT",
"version": "v1"
}
] | 2018-10-03 | [
[
"Upadhyay",
"Sudhaker",
""
]
] | In this paper, we consider a charged rotating AdS black holes in four dimensions and study the effects of leading-order thermal corrections on the thermodynamics of such system explicitly. The first-order corrected thermodynamical quantities also satisfy the first-law of thermodynamics of the black holes. The holograph... |
2208.13320 | Artyom Astashenok V | Artyom V. Astashenok, Alexander S. Tepliakov | Tsallis holographic dark energy model with event horizon cutoff in
modified gravity | 20 pp., 7 figures; to appear in Int. J. Geom. Meth. Mod. Phys | null | 10.1142/S0219887822502346 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We considered the Tsallis holographic dark energy model in frames of
Nojiri-Odintsov gravity with $f(R)=R+\lambda R^2-\sigma{\mu}/{R}$. For IR
cutoff event horizon is taken. The cosmological evolution of such universe is
investigated for various initial conditions and values of parameters. The
dependence of the Hubbl... | [
{
"created": "Mon, 29 Aug 2022 00:52:35 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Tepliakov",
"Alexander S.",
""
]
] | We considered the Tsallis holographic dark energy model in frames of Nojiri-Odintsov gravity with $f(R)=R+\lambda R^2-\sigma{\mu}/{R}$. For IR cutoff event horizon is taken. The cosmological evolution of such universe is investigated for various initial conditions and values of parameters. The dependence of the Hubble ... |
gr-qc/0311077 | Adam Szereszewski | Adam Szereszewski, Jacek Tafel | Perfect Fluid Spacetimes With Two Symmetries | 7 pages, no figures, LaTeX2e, to be published in Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 1755-1760 | 10.1088/0264-9381/21/7/003 | null | gr-qc | null | A method of solving perfect fluid Einstein equations with two commuting
spacelike Killing vectors is presented. Given a spacelike 2-dimensional surface
in the 3-dimensional nonphysical Minkowski space the field equations reduce to
a single nonlinear differential equation. An example is discussed.
| [
{
"created": "Mon, 24 Nov 2003 12:19:29 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Szereszewski",
"Adam",
""
],
[
"Tafel",
"Jacek",
""
]
] | A method of solving perfect fluid Einstein equations with two commuting spacelike Killing vectors is presented. Given a spacelike 2-dimensional surface in the 3-dimensional nonphysical Minkowski space the field equations reduce to a single nonlinear differential equation. An example is discussed. |
gr-qc/0007038 | Cristian Martinez | Norman Cruz and Cristian Martinez | Cosmological scaling solutions of minimally coupled scalar fields in
three dimensions | LaTeX2e, 11 pages, 4 figures. To be published in Classical and
Quantum Gravity | Class.Quant.Grav. 17 (2000) 2867-2874 | 10.1088/0264-9381/17/15/302 | CECS-PHY-00/02 | gr-qc | null | We examine Friedmann-Robertson-Walker models in three spacetime dimensions.
The matter content of the models is composed of a perfect fluid, with a
$\gamma$-law equation of state, and a homogeneous scalar field minimally
coupled to gravity with a self-interacting potential whose energy density
red-shifts as $a^{-2 \n... | [
{
"created": "Mon, 17 Jul 2000 23:10:10 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cruz",
"Norman",
""
],
[
"Martinez",
"Cristian",
""
]
] | We examine Friedmann-Robertson-Walker models in three spacetime dimensions. The matter content of the models is composed of a perfect fluid, with a $\gamma$-law equation of state, and a homogeneous scalar field minimally coupled to gravity with a self-interacting potential whose energy density red-shifts as $a^{-2 \nu}... |
gr-qc/0006028 | Daniel Sforza | Mario A. Castagnino, Fabian H. Gaioli, and Daniel M. Sforza | Entropy generation in cosmological particle creation | 14 pages (Latex manuscript) | Gen.Rel.Grav. 28 (1996) 1129 | 10.1007/BF02113163 | null | gr-qc | null | A very simplified model of the Universe is considered in order to propose an
alternative approach to the irreversible evolution of the Universe at very
early times. The entropy generation at the quantum stage can be thought as a
consequence of an instability of the system. Then particle creation arises from
this inst... | [
{
"created": "Wed, 7 Jun 2000 20:41:33 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Castagnino",
"Mario A.",
""
],
[
"Gaioli",
"Fabian H.",
""
],
[
"Sforza",
"Daniel M.",
""
]
] | A very simplified model of the Universe is considered in order to propose an alternative approach to the irreversible evolution of the Universe at very early times. The entropy generation at the quantum stage can be thought as a consequence of an instability of the system. Then particle creation arises from this instab... |
gr-qc/9910006 | Zbigniew Haba | Z. Haba | Decoherence and quantum mechanics in a gravitational field | 11 pages, LaTex file | null | null | IFT UWr 925/1999 | gr-qc | null | Quantum mechanical interference of wave functions leads to some difficulties
if a probability density is considered as a source of gravity. We show that an
introduction of a quantum energy-momentum tensor as a source term in Einstein
equations can be consistent with general relativity if the gravitational waves
are q... | [
{
"created": "Mon, 4 Oct 1999 08:35:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Haba",
"Z.",
""
]
] | Quantum mechanical interference of wave functions leads to some difficulties if a probability density is considered as a source of gravity. We show that an introduction of a quantum energy-momentum tensor as a source term in Einstein equations can be consistent with general relativity if the gravitational waves are qua... |
0706.1979 | Jacobo Diaz Polo | Jacobo Diaz-Polo and Enrique Fernandez-Borja | Black hole radiation spectrum in LQG: Isolated Horizon framework | 6 pages, 2 figures; version to appear in Classical and Quantum
Gravity | Class.Quant.Grav.25:105007,2008 | 10.1088/0264-9381/25/10/105007 | null | gr-qc | null | Recent detailed analysis within the Loop Quantum Gravity calculation of black
hole entropy shows a stair-like structure in the behavior of entropy as a
function of horizon area. The non-trivial distribution of the degeneracy of the
black hole horizon area eigenstates is at the origin of this behavior. This
degeneracy... | [
{
"created": "Thu, 14 Jun 2007 18:30:06 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Apr 2008 11:41:02 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Fernandez-Borja",
"Enrique",
""
]
] | Recent detailed analysis within the Loop Quantum Gravity calculation of black hole entropy shows a stair-like structure in the behavior of entropy as a function of horizon area. The non-trivial distribution of the degeneracy of the black hole horizon area eigenstates is at the origin of this behavior. This degeneracy d... |
1906.06372 | Eugen Radu | Burkhard Kleihaus, Jutta Kunz and Eugen Radu | Balancing a static black ring with a phantom scalar field | 12 pages, 5 figures | null | 10.1016/j.physletb.2019.134892 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All known five dimensional, asymptotically flat, static black rings possess
conical singularities. However, there is no fundamental obstruction forbidding
the existence of balanced configurations, and we show that the
Einstein--Klein-Gordon equations admit (numerical) solutions describing static
asymptotically flat b... | [
{
"created": "Fri, 14 Jun 2019 19:13:05 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
]
] | All known five dimensional, asymptotically flat, static black rings possess conical singularities. However, there is no fundamental obstruction forbidding the existence of balanced configurations, and we show that the Einstein--Klein-Gordon equations admit (numerical) solutions describing static asymptotically flat bla... |
0710.0416 | Dah-Wei Chiou | Dah-Wei Chiou | Effective Dynamics, Big Bounces and Scaling Symmetry in Bianchi Type I
Loop Quantum Cosmology | 19 pages, 6 figures, 1 table; one reference added; version to appear
in PRD | Phys.Rev.D76:124037,2007 | 10.1103/PhysRevD.76.124037 | IGC-07/9-4 | gr-qc | null | The detailed formulation for loop quantum cosmology (LQC) in the Bianchi I
model with a scalar massless field has been constructed. In this paper, its
effective dynamics is studied in two improved strategies for implementing the
LQC discreteness corrections. Both schemes show that the big bang is replaced
by the big ... | [
{
"created": "Tue, 2 Oct 2007 00:32:18 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Dec 2007 23:20:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chiou",
"Dah-Wei",
""
]
] | The detailed formulation for loop quantum cosmology (LQC) in the Bianchi I model with a scalar massless field has been constructed. In this paper, its effective dynamics is studied in two improved strategies for implementing the LQC discreteness corrections. Both schemes show that the big bang is replaced by the big bo... |
1301.7688 | Tim Koslowski A | Henrique Gomes, Tim Koslowski | Shape Dynamics and Gauge-Gravity Duality | 4 pages, LaTeX, contribution to the 13th Marcel Grossmann Meeting | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of gravity can be described by two different systems. The first
is the familiar spacetime picture of General Relativity, the other is the
conformal picture of Shape Dynamics. We argue that the bulk equivalence of
General Relativity and Shape Dynamics is a natural setting to discuss familiar
bulk/boundary... | [
{
"created": "Thu, 31 Jan 2013 17:09:47 GMT",
"version": "v1"
}
] | 2013-02-01 | [
[
"Gomes",
"Henrique",
""
],
[
"Koslowski",
"Tim",
""
]
] | The dynamics of gravity can be described by two different systems. The first is the familiar spacetime picture of General Relativity, the other is the conformal picture of Shape Dynamics. We argue that the bulk equivalence of General Relativity and Shape Dynamics is a natural setting to discuss familiar bulk/boundary d... |
1805.12246 | James B. Hartle | James B. Hartle (UCSB) | The Quantum Mechanics of Cosmology | 92 pages, 14 figures, presented at 7th Jerusalem Winter School 1990
on Quantum Cosmology and Baby Universes, posted here because the school
proceedings are out of print | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Notes from the lectures by the author at the 7th Jerusalem Winter School 1990
on Quantum Cosmology and Baby Universes. The lectures covered quantum mechanics
for closed systems like the universe, generalized quantum mechanics, time in
quantum mechanics, the quantum mechanics spacetime, and practical quantum
cosmology... | [
{
"created": "Wed, 30 May 2018 22:18:06 GMT",
"version": "v1"
}
] | 2018-06-01 | [
[
"Hartle",
"James B.",
"",
"UCSB"
]
] | Notes from the lectures by the author at the 7th Jerusalem Winter School 1990 on Quantum Cosmology and Baby Universes. The lectures covered quantum mechanics for closed systems like the universe, generalized quantum mechanics, time in quantum mechanics, the quantum mechanics spacetime, and practical quantum cosmology. ... |
1503.04734 | Mariano Cadoni | Mariano Cadoni and Edgardo Franzin | Asymptotically flat black holes sourced by a massless scalar field | 12 pages, no figures. Refs. [27-33] added. Some remarks about
previous derivation and stability of solution (5.4) added | Phys. Rev. D 91, 104011 (2015) | 10.1103/PhysRevD.91.104011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive exact, asymptotically flat black hole solutions of Einstein-scalar
gravity sourced by a non trivial scalar field with $1/r$ asymptotic behaviour.
They are determined using an ansatz for the scalar field profile and working
out, together with the metric functions, the corresponding form of the scalar
self-in... | [
{
"created": "Mon, 16 Mar 2015 17:15:07 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Mar 2015 12:55:36 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Cadoni",
"Mariano",
""
],
[
"Franzin",
"Edgardo",
""
]
] | We derive exact, asymptotically flat black hole solutions of Einstein-scalar gravity sourced by a non trivial scalar field with $1/r$ asymptotic behaviour. They are determined using an ansatz for the scalar field profile and working out, together with the metric functions, the corresponding form of the scalar self-inte... |
2301.01938 | Haximjan Abdusattar | Haximjan Abdusattar, Shi-Bei Kong, Hongsheng Zhang, Ya-Peng Hu | Phase Transitions and Critical Phenomena for the FRW Universe in an
Effective Scalar-Tensor Theory | 12 pages, 1 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find phase transitions and critical phenomena of the FRW
(Friedmann-Robertson-Walker) universe in the framework of an effective
scalar-tensor theory that belongs to the Horndeski class. We identify the
thermodynamic pressure (generalized force) $P$ of the FRW universe in this
theory with the work density $W$ of th... | [
{
"created": "Thu, 5 Jan 2023 07:20:46 GMT",
"version": "v1"
}
] | 2023-01-06 | [
[
"Abdusattar",
"Haximjan",
""
],
[
"Kong",
"Shi-Bei",
""
],
[
"Zhang",
"Hongsheng",
""
],
[
"Hu",
"Ya-Peng",
""
]
] | We find phase transitions and critical phenomena of the FRW (Friedmann-Robertson-Walker) universe in the framework of an effective scalar-tensor theory that belongs to the Horndeski class. We identify the thermodynamic pressure (generalized force) $P$ of the FRW universe in this theory with the work density $W$ of the ... |
gr-qc/9603063 | Carlo Rovelli | Carlo Rovelli | Black Hole Entropy from Loop Quantum Gravity | 5 pages, latex-revtex, no figures | Phys.Rev.Lett.77:3288-3291,1996 | 10.1103/PhysRevLett.77.3288 | null | gr-qc | null | We argue that the statistical entropy relevant for the thermal interactions
of a black hole with its surroundings is (the logarithm of) the number of
quantum microstates of the hole which are distinguishable from the hole's
exterior, and which correspond to a given hole's macroscopic configuration. We
compute this nu... | [
{
"created": "Sat, 30 Mar 1996 19:45:20 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Rovelli",
"Carlo",
""
]
] | We argue that the statistical entropy relevant for the thermal interactions of a black hole with its surroundings is (the logarithm of) the number of quantum microstates of the hole which are distinguishable from the hole's exterior, and which correspond to a given hole's macroscopic configuration. We compute this numb... |
gr-qc/0207098 | Keisuke Taniguchi | Keisuke Taniguchi and Eric Gourgoulhon | Quasiequilibrium sequences of synchronized and irrotational binary
neutron stars in general relativity. III. Identical and different mass stars
with gamma=2 | 17 pages, revtex file with 14 figures and 4 tables, accepted for
publication in Phys. Rev. D | Phys.Rev. D66 (2002) 104019 | 10.1103/PhysRevD.66.104019 | null | gr-qc astro-ph | null | We present the first computations of quasiequilibrium binary neutron stars
with different mass components in general relativity, within the
Isenberg-Wilson-Mathews approximation. We consider both cases of synchronized
rotation and irrotational motion. A polytropic equation of state is used with
the adiabatic index ga... | [
{
"created": "Thu, 25 Jul 2002 03:27:11 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Oct 2002 05:57:07 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Taniguchi",
"Keisuke",
""
],
[
"Gourgoulhon",
"Eric",
""
]
] | We present the first computations of quasiequilibrium binary neutron stars with different mass components in general relativity, within the Isenberg-Wilson-Mathews approximation. We consider both cases of synchronized rotation and irrotational motion. A polytropic equation of state is used with the adiabatic index gamm... |
1401.1838 | Miguel Sabido | J. C. L\'opez-Dom\'inguez, J. E. Rosales-Quintero and M. Sabido | Comments On Torsion and MacDowell-Mansouri gravity | 14 pages, no figures, matches published version | Int.J.Mod.Phys.D 27 (2017) 03, 1850018 | 10.1142/S0218271818500189 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting with the MacDowell-Mansouri formulation of gravity with a $SO(4,1)$
gauge group, we introduce new parameters into the action to include the
non-dynamical Holst term, and the topological Nieh-Yan and Pontryagin classes.
Then, we consider the new parameters as fields and analyze the solutions coming
from their... | [
{
"created": "Wed, 8 Jan 2014 21:33:30 GMT",
"version": "v1"
},
{
"created": "Sat, 15 May 2021 03:19:22 GMT",
"version": "v2"
}
] | 2021-05-18 | [
[
"López-Domínguez",
"J. C.",
""
],
[
"Rosales-Quintero",
"J. E.",
""
],
[
"Sabido",
"M.",
""
]
] | Starting with the MacDowell-Mansouri formulation of gravity with a $SO(4,1)$ gauge group, we introduce new parameters into the action to include the non-dynamical Holst term, and the topological Nieh-Yan and Pontryagin classes. Then, we consider the new parameters as fields and analyze the solutions coming from their e... |
gr-qc/9212014 | Malcolm MacCallum | M.A.H. MacCallum | Anisotropic and inhomogeneous cosmologies | 21 pp | The Renaissance of General Relativity and Cosmology (A survey to
celebrate the 65th birthday of Dennis Sciama), ed. G. Ellis, A. Lanza and
J.C. Miller, Cambridge University Press (1993), pp. 213-233 | null | null | gr-qc | null | This review was given at the 65th birthday meeting of D.W. Sciama, The
Renaissance of General Relativity and Cosmology, to be published by Cambridge
University Press. It presents progress in the understanding of non-standard
relativistic cosmologies during Sciama's career, organized by the areas of
application rather... | [
{
"created": "Mon, 21 Dec 1992 15:59:48 GMT",
"version": "v1"
}
] | 2008-02-12 | [
[
"MacCallum",
"M. A. H.",
""
]
] | This review was given at the 65th birthday meeting of D.W. Sciama, The Renaissance of General Relativity and Cosmology, to be published by Cambridge University Press. It presents progress in the understanding of non-standard relativistic cosmologies during Sciama's career, organized by the areas of application rather t... |
2004.11843 | Jaume Haro | Jaume Haro and Llibert Arest\'e Sal\'o | The spectrum of Gravitational Waves, their overproduction in
quintessential inflation and its influence in the reheating temperature | 51 pages, 4 figures, 1 table, new material and references added.
Version accepted for publication in Universe | null | 10.3390/universe6060087 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the most important issues in an inflationary theory as standard or
quintessential inflation is the mechanism to reheat the universe after the end
of the inflationary period in order to match with the Hot Big Bang universe. In
quintessential inflation two mechanisms are frequently used, namely the
reheating via... | [
{
"created": "Fri, 24 Apr 2020 16:29:45 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 2020 10:49:36 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Jun 2020 09:16:39 GMT",
"version": "v3"
}
] | 2023-01-03 | [
[
"Haro",
"Jaume",
""
],
[
"Saló",
"Llibert Aresté",
""
]
] | One of the most important issues in an inflationary theory as standard or quintessential inflation is the mechanism to reheat the universe after the end of the inflationary period in order to match with the Hot Big Bang universe. In quintessential inflation two mechanisms are frequently used, namely the reheating via g... |
1107.4294 | Johannes Hartung | Johannes Hartung and Jan Steinhoff | Next-to-next-to-leading order post-Newtonian spin(1)-spin(2) Hamiltonian
for self-gravitating binaries | 7 pages, v2: published version | Ann. Phys. (Berlin) 523:919 (2011) | 10.1002/andp.201100163 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the next-to-next-to-leading order post-Newtonian (PN)
spin(1)-spin(2) Hamiltonian for two self-gravitating spinning compact objects.
If both objects are rapidly rotating, then the corresponding interaction is
comparable in strength to a 4PN effect. The Hamiltonian is checked via the
global Poincare algebra... | [
{
"created": "Thu, 21 Jul 2011 15:08:05 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2011 10:25:09 GMT",
"version": "v2"
}
] | 2011-10-05 | [
[
"Hartung",
"Johannes",
""
],
[
"Steinhoff",
"Jan",
""
]
] | We present the next-to-next-to-leading order post-Newtonian (PN) spin(1)-spin(2) Hamiltonian for two self-gravitating spinning compact objects. If both objects are rapidly rotating, then the corresponding interaction is comparable in strength to a 4PN effect. The Hamiltonian is checked via the global Poincare algebra w... |
1302.1880 | Christopher Burton | C. D. Burton | Finite temperature R-squared quantum gravity | 14 pages | null | null | MIFPA-13-05 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum gravity path integral's measure can be written as the product of
classical backgrounds and quantum fluctuations about each background. After
proving that fluctuations about the background do not diffuse in Hilbert space
and obey the laws of many-body statistics, their probability distributions,
entropy, a... | [
{
"created": "Thu, 7 Feb 2013 21:10:24 GMT",
"version": "v1"
}
] | 2013-02-11 | [
[
"Burton",
"C. D.",
""
]
] | The quantum gravity path integral's measure can be written as the product of classical backgrounds and quantum fluctuations about each background. After proving that fluctuations about the background do not diffuse in Hilbert space and obey the laws of many-body statistics, their probability distributions, entropy, and... |
2207.00955 | Damien A. Easson | J. E. Lesnefsky, D. A. Easson and P. C. W. Davies | On the past-completeness of inflationary spacetimes | 14 pages, 4 figures, significant revisions, matches version to appear
in PRD | null | 10.1103/PhysRevD.107.044024 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss the question of whether or not inflationary spacetimes can be
geodesically complete in the infinite past. Geodesic completeness is a
necessary condition for averting an initial singularity during eternal
inflation. It is frequently argued that cosmological models which are expanding
sufficiently fast (havi... | [
{
"created": "Sun, 3 Jul 2022 04:58:37 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2023 00:35:49 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Lesnefsky",
"J. E.",
""
],
[
"Easson",
"D. A.",
""
],
[
"Davies",
"P. C. W.",
""
]
] | We discuss the question of whether or not inflationary spacetimes can be geodesically complete in the infinite past. Geodesic completeness is a necessary condition for averting an initial singularity during eternal inflation. It is frequently argued that cosmological models which are expanding sufficiently fast (having... |
gr-qc/0601042 | Alfredo Sandoval-Villalbazo | A. Sandoval-Villalbazo, A. L. Garcia-Perciante and L. S. Garcia-Colin | Hyperbolic heat equation in Kaluza's magnetohydrodynamics | 14 pages, no figures | Gen.Rel.Grav.39:1287-1296,2007 | 10.1007/s10714-007-0460-0 | null | gr-qc astro-ph | null | This paper shows that a hyperbolic equation for heat conduction can be
obtained directly using the tenets of linear irreversible thermodynamics in the
context of the five dimensional space-time metric originally proposed by T.
Kaluza back in 1922. The associated speed of propagation is slightly lower than
the speed o... | [
{
"created": "Wed, 11 Jan 2006 19:06:15 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sandoval-Villalbazo",
"A.",
""
],
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Garcia-Colin",
"L. S.",
""
]
] | This paper shows that a hyperbolic equation for heat conduction can be obtained directly using the tenets of linear irreversible thermodynamics in the context of the five dimensional space-time metric originally proposed by T. Kaluza back in 1922. The associated speed of propagation is slightly lower than the speed of ... |
1208.4871 | Eanna E. Flanagan | Sergei Dyda, Eanna E. Flanagan and Marc Kamionkowski | Vacuum Instability in Chern-Simons Gravity | 8 pages, 2 figures; final published version | null | 10.1103/PhysRevD.86.124031 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore perturbations about a Friedmann-Robertson-Walker background in
Chern-Simons gravity. At large momenta one of the two circularly polarized
tensor modes becomes ghostlike. We argue that nevertheless the theory does not
exhibit classical runaway solutions, except possibly in the relativistic
nonlinear regime.... | [
{
"created": "Thu, 23 Aug 2012 21:59:07 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Nov 2012 13:58:37 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Dyda",
"Sergei",
""
],
[
"Flanagan",
"Eanna E.",
""
],
[
"Kamionkowski",
"Marc",
""
]
] | We explore perturbations about a Friedmann-Robertson-Walker background in Chern-Simons gravity. At large momenta one of the two circularly polarized tensor modes becomes ghostlike. We argue that nevertheless the theory does not exhibit classical runaway solutions, except possibly in the relativistic nonlinear regime. H... |
gr-qc/9502025 | Carlos Kozameh | Simonetta Frittelli, Carlos Kozameh, Ted Newman | Lorentzian Metrics from Characteristic Surfaces | 14 pages, tarred, compressed and uuencode RTF file | J.Math.Phys. 36 (1995) 4975-4983 | 10.1063/1.531209 | null | gr-qc | null | The following issue is raised and discussed; when do families of foliations
by hypersurfaces on a given four dimensional manifold become the null surfaces
of some unknown, but to be determined, metric $g_{ab}(x)$? It follows from
these results that one can use these surfaces as fundamental variables for GR.
| [
{
"created": "Fri, 10 Feb 1995 07:57:37 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Feb 1995 11:19:06 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Frittelli",
"Simonetta",
""
],
[
"Kozameh",
"Carlos",
""
],
[
"Newman",
"Ted",
""
]
] | The following issue is raised and discussed; when do families of foliations by hypersurfaces on a given four dimensional manifold become the null surfaces of some unknown, but to be determined, metric $g_{ab}(x)$? It follows from these results that one can use these surfaces as fundamental variables for GR. |
1909.09752 | Luis Granda | L. N. Granda, G. D. Rojas | Modified Gravity in the framework of holographic dark energy | 24 pages, 5 figures, accepted in MPLA | null | 10.1142/S021773232050025X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified gravity is considered in the framework of the holographic dark
energy. An analysis of the autonomous system, the critical points and their
stability is presented. Unlike the dark energy models based on $f(R)$, it is
found that working in the holographic frame enriches the possibility of
accelerated and m... | [
{
"created": "Sat, 21 Sep 2019 00:51:15 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Granda",
"L. N.",
""
],
[
"Rojas",
"G. D.",
""
]
] | The modified gravity is considered in the framework of the holographic dark energy. An analysis of the autonomous system, the critical points and their stability is presented. Unlike the dark energy models based on $f(R)$, it is found that working in the holographic frame enriches the possibility of accelerated and mat... |
gr-qc/0101123 | Jose' P. S. Lemos | Alexander B. Balakin, Jose' P. S. Lemos | Singular Behaviour of electric and magnetic fields in dielectric media
in a non-linear gravitational wave background | 16 pages, Latex | Class.Quant.Grav. 18 (2001) 941 | 10.1088/0264-9381/18/5/311 | null | gr-qc | null | Evolution of electric and magnetic fields in dielectric media, driven by the
influence of a strong gravitational wave, is considered for four exactly
integrable models. It is shown that the gravitational wave field gives rise to
new effects and to singular behaviour in the electromagnetic field.
| [
{
"created": "Tue, 30 Jan 2001 20:29:07 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Lemos",
"Jose' P. S.",
""
]
] | Evolution of electric and magnetic fields in dielectric media, driven by the influence of a strong gravitational wave, is considered for four exactly integrable models. It is shown that the gravitational wave field gives rise to new effects and to singular behaviour in the electromagnetic field. |
gr-qc/0512014 | Rajesh Nayak K | Soumya D. Mohanty and Rajesh K. Nayak | Tomographic approach to resolving the distribution of LISA Galactic
binaries | 13 Pages and 9 figures high resolution figures can be obtains from
http://www.phys.utb.edu/~rajesh/lisa_tomography.pdf | Phys.Rev. D73 (2006) 083006 | 10.1103/PhysRevD.73.083006 | null | gr-qc | null | The space based gravitational wave detector LISA is expected to observe a
large population of Galactic white dwarf binaries whose collective signal is
likely to dominate instrumental noise at observational frequencies in the range
10^{-4} to 10^{-3} Hz. The motion of LISA modulates the signal of each binary
in both f... | [
{
"created": "Fri, 2 Dec 2005 17:19:57 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mohanty",
"Soumya D.",
""
],
[
"Nayak",
"Rajesh K.",
""
]
] | The space based gravitational wave detector LISA is expected to observe a large population of Galactic white dwarf binaries whose collective signal is likely to dominate instrumental noise at observational frequencies in the range 10^{-4} to 10^{-3} Hz. The motion of LISA modulates the signal of each binary in both fre... |
1601.00156 | Diego Rubiera-Garcia | Gonzalo J. Olmo and Diego Rubiera-Garcia | Geons as wormholes of modified gravity | 6 pages; Contribution to the proceedings of "The Fourtheenth Marcel
Grossmann Meeting on General Relativity", University of Rome "La Sapienza",
Rome, July 12-18, 2015, based on an invited talk delivered at the AT3
parallel session | null | null | IFIC/16-57 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormholes may arise as solutions of extensions of General Relativity without
violation of the energy conditions. Working in a Palatini approach we consider
classical geometries supporting such wormholes. It is shown that the resulting
space-times represent explicit realizations of the concept of geon introduced
by Wh... | [
{
"created": "Sat, 2 Jan 2016 09:46:29 GMT",
"version": "v1"
}
] | 2016-07-25 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | Wormholes may arise as solutions of extensions of General Relativity without violation of the energy conditions. Working in a Palatini approach we consider classical geometries supporting such wormholes. It is shown that the resulting space-times represent explicit realizations of the concept of geon introduced by Whee... |
2003.04568 | Sudan Hansraj | Sudan Hansraj, Megandhren Govender, Lushen Moodly and Ksh. Newton
Singh | Strange stars in the framework of higher curvature gravity | 20 Pages, 15 figures, 1 table | null | null | null | gr-qc astro-ph.IM hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the influence of higher curvature effects on stellar structure and
conclude that the properties of stars are greatly impacted when such terms are
dynamic. In particular the surface gravitational redshift which is connected to
the equation of state and also the mass-radius ratio differs greatly from the
corre... | [
{
"created": "Tue, 10 Mar 2020 08:25:02 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2020 13:40:19 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jul 2020 08:12:03 GMT",
"version": "v3"
},
{
"created": "Mon, 6 Jul 2020 11:19:11 GMT",
"version": "v4"
},
{
"cre... | 2021-08-17 | [
[
"Hansraj",
"Sudan",
""
],
[
"Govender",
"Megandhren",
""
],
[
"Moodly",
"Lushen",
""
],
[
"Singh",
"Ksh. Newton",
""
]
] | We study the influence of higher curvature effects on stellar structure and conclude that the properties of stars are greatly impacted when such terms are dynamic. In particular the surface gravitational redshift which is connected to the equation of state and also the mass-radius ratio differs greatly from the corresp... |
1002.5001 | Jonathan McDonald | Jonathan R. McDonald and Warner A. Miller | Coupling Non-Gravitational Fields with Simplicial Spacetimes | 10 pages, no figures, Latex, fixed typos and minor corrections. | Class. Quantum Grav.27:095011,2010 | 10.1088/0264-9381/27/9/095011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inclusion of source terms in discrete gravity is a long-standing problem.
Providing a consistent coupling of source to the lattice in Regge Calculus (RC)
yields a robust unstructured spacetime mesh applicable to both numerical
relativity and quantum gravity. RC provides a particularly insightful approach
to this ... | [
{
"created": "Fri, 26 Feb 2010 14:47:28 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Apr 2010 10:37:53 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"McDonald",
"Jonathan R.",
""
],
[
"Miller",
"Warner A.",
""
]
] | The inclusion of source terms in discrete gravity is a long-standing problem. Providing a consistent coupling of source to the lattice in Regge Calculus (RC) yields a robust unstructured spacetime mesh applicable to both numerical relativity and quantum gravity. RC provides a particularly insightful approach to this pr... |
2006.16810 | Angelo E. S. Hartmann | M. Novello and A. E. S. Hartmann | From weak interaction to gravity | 18 pages, extended version that includes arXiv:2007.01140 | Int. J. Mod. Phys. A 36, 7 (2021) 21500051 | 10.1142/S0217751X21500512 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We follow an old suggestion made by Stueckelberg that there exists an
intimate connection between weak interaction and gravity, symbolized by the
relationship between the Fermi and Newton\rq s constants. We analyze the
hypothesis that the effect of matter upon the metric that represents
gravitational interaction in G... | [
{
"created": "Mon, 29 Jun 2020 06:25:14 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2020 20:32:03 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Apr 2021 15:58:28 GMT",
"version": "v3"
}
] | 2021-12-20 | [
[
"Novello",
"M.",
""
],
[
"Hartmann",
"A. E. S.",
""
]
] | We follow an old suggestion made by Stueckelberg that there exists an intimate connection between weak interaction and gravity, symbolized by the relationship between the Fermi and Newton\rq s constants. We analyze the hypothesis that the effect of matter upon the metric that represents gravitational interaction in Gen... |
gr-qc/9905078 | Francisco Turrubiates | Maciej Przanowski, Sebastian Formanski and Francisco J.Turrubiates | Nonlinear Graviton as a Limit of sl(N;C) Chiral Fields as N--> infty | 9 pages, LaTeX file, no figures, version published in Mod. Phys.
Lett. A | Mod.Phys.Lett. A13 (1998) 3193-3200 | 10.1142/S0217732398003405 | CINVESTAV-FIS-31/98 | gr-qc | null | An example of a sequence of the sl(N;C) chiral fields, for N$\geq 2$, tending
to the complex heavenly metric (nonlinear graviton) of the type [4]x[-] when N
--> infinity is given.
| [
{
"created": "Thu, 20 May 1999 15:29:31 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Przanowski",
"Maciej",
""
],
[
"Formanski",
"Sebastian",
""
],
[
"Turrubiates",
"Francisco J.",
""
]
] | An example of a sequence of the sl(N;C) chiral fields, for N$\geq 2$, tending to the complex heavenly metric (nonlinear graviton) of the type [4]x[-] when N --> infinity is given. |
0908.3885 | Timir Datta | Timir Datta and Ming Yin | Do Quantum Systems Break The Equivalence Principle? | 14 PDF pages including 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational response of real objects is a fascinating topic. Einstein
formalized the Galileo-Newton ideas of equality of free falls into complete
physical equivalence or the Principle of Equivalence [Albert Einstein, The
meaning of Relativity, 5 ed. Princeton, (1921)]. However, in this article we
point out that in ... | [
{
"created": "Wed, 26 Aug 2009 19:29:02 GMT",
"version": "v1"
}
] | 2009-08-27 | [
[
"Datta",
"Timir",
""
],
[
"Yin",
"Ming",
""
]
] | Gravitational response of real objects is a fascinating topic. Einstein formalized the Galileo-Newton ideas of equality of free falls into complete physical equivalence or the Principle of Equivalence [Albert Einstein, The meaning of Relativity, 5 ed. Princeton, (1921)]. However, in this article we point out that in a ... |
2204.03993 | Irene Fiori | Nicolas Arnaud, Rosario De Rosa, Francesco Di Renzo, Irene Fiori,
Carlo Giunchi, Kamiel Janssens, Alessandro Longo, Marco Olivieri, Federico
Paoletti, Paolo Ruggi, Maria Concetta Tringali | External environmental noise influences on Virgo during O3 | contribution to the 2021 Gravitation session of the 55th Rencontres
de Moriond | null | null | null | gr-qc physics.ins-det | http://creativecommons.org/licenses/by/4.0/ | Sources of geophysical noise, such as wind, sea waves and earthquakes, can
have an impact on gravitational wave interferometers causing sensitivity
worsening and gaps in data taking. During the 1-year long O3 run (April 1st
2019 to March 27th 2020), the Virgo Collaboration collected a statistically
significant datase... | [
{
"created": "Fri, 8 Apr 2022 10:54:52 GMT",
"version": "v1"
}
] | 2022-04-11 | [
[
"Arnaud",
"Nicolas",
""
],
[
"De Rosa",
"Rosario",
""
],
[
"Di Renzo",
"Francesco",
""
],
[
"Fiori",
"Irene",
""
],
[
"Giunchi",
"Carlo",
""
],
[
"Janssens",
"Kamiel",
""
],
[
"Longo",
"Alessandro",
""
],... | Sources of geophysical noise, such as wind, sea waves and earthquakes, can have an impact on gravitational wave interferometers causing sensitivity worsening and gaps in data taking. During the 1-year long O3 run (April 1st 2019 to March 27th 2020), the Virgo Collaboration collected a statistically significant dataset ... |
1012.4039 | Thomas Sotiriou | Thomas P. Sotiriou, Baojiu Li, John D. Barrow | Generalizations of teleparallel gravity and local Lorentz symmetry | 6 pages; v2: minor edits to match published version | Phys.Rev.D83:104030,2011 | 10.1103/PhysRevD.83.104030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the relation between teleparallelism and local Lorentz invariance.
We show that generic modifications of the teleparallel equivalent to general
relativity will not respect local Lorentz symmetry. We clarify the reasons for
this and explain why the situation is different in general relativity. We give
a pre... | [
{
"created": "Sat, 18 Dec 2010 00:05:00 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2011 07:59:57 GMT",
"version": "v2"
}
] | 2011-05-25 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Li",
"Baojiu",
""
],
[
"Barrow",
"John D.",
""
]
] | We analyze the relation between teleparallelism and local Lorentz invariance. We show that generic modifications of the teleparallel equivalent to general relativity will not respect local Lorentz symmetry. We clarify the reasons for this and explain why the situation is different in general relativity. We give a presc... |
gr-qc/0412064 | Kjell Rosquist | Kjell Rosquist | Gravitationally induced electromagnetism at the Compton scale | 11 pages, 3 figures: revised version published in Class. Quantum
Grav. 23 (2006) 3111-3122; Conclusions unchanged | Class.Quant.Grav.23:3111-3122,2006 | 10.1088/0264-9381/23/9/021 | null | gr-qc astro-ph hep-ph hep-th nucl-th | null | It is shown that Einstein gravity tends to modify the electric and magnetic
fields appreciably at distances of the order of the Compton wavelength. At that
distance the gravitational field becomes spin dominated rather than mass
dominated. The gravitational field couples to the electromagnetic field via the
Einstein-... | [
{
"created": "Tue, 14 Dec 2004 13:32:04 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Dec 2004 08:06:58 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Apr 2006 13:32:52 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Rosquist",
"Kjell",
""
]
] | It is shown that Einstein gravity tends to modify the electric and magnetic fields appreciably at distances of the order of the Compton wavelength. At that distance the gravitational field becomes spin dominated rather than mass dominated. The gravitational field couples to the electromagnetic field via the Einstein-Ma... |
1212.3698 | Shan Bai | Shan Bai, Niall \'O Murchadha | Scaling up the extrinsic curvature in gravitational initial data | 9 pages, 8 figures | Physical Review D85, 044028 (2012) | 10.1103/PhysRevD.85.044028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum solutions to the Einstein equations can be viewed as the interplay
between the geometry and the gravitational wave energy content. The constraints
on initial data reflect this interaction. We assume we are looking at
cosmological solutions to the Einstein equations so we assume that the 3-space
is compact, wit... | [
{
"created": "Sat, 15 Dec 2012 16:05:44 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Bai",
"Shan",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | Vacuum solutions to the Einstein equations can be viewed as the interplay between the geometry and the gravitational wave energy content. The constraints on initial data reflect this interaction. We assume we are looking at cosmological solutions to the Einstein equations so we assume that the 3-space is compact, witho... |
gr-qc/9806087 | Edward Seidel | Edward Seidel | The Synergy between Numerical and Perturbative Approaches to Black Holes | 18 pages, 7 figures, To appear in "On the Black Hole Trail" eds. Bala
Iyer and Biplab Bhawal (Kluwer) | null | null | AEI-066 | gr-qc | null | I describe approaches to the study of black hole spacetimes via numerical
relativity. After a brief review of the basic formalisms and techniques used in
numerical black hole simulations, I discuss a series of calculations from
axisymmetry to full 3D that can be seen as stepping stones to simulations of
the full 3D c... | [
{
"created": "Tue, 23 Jun 1998 08:55:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Seidel",
"Edward",
""
]
] | I describe approaches to the study of black hole spacetimes via numerical relativity. After a brief review of the basic formalisms and techniques used in numerical black hole simulations, I discuss a series of calculations from axisymmetry to full 3D that can be seen as stepping stones to simulations of the full 3D coa... |
1202.5972 | Carlos Kozameh | Carlos N. Kozameh, Gonzalo Quiroga | Spin and Center of Mass in Axially Symmetric Einstein-Maxwell Spacetimes | 20 pages | null | 10.1088/0264-9381/29/23/235006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a definition and derive the equations of motion for the center of
mass and angular momentum of an axially symmetric, isolated system that emits
gravitational and electromagnetic radiation. A central feature of this
formulation is the use of Newman-Unti cuts at null infinity that are generated
by worldlines of... | [
{
"created": "Mon, 27 Feb 2012 15:31:58 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Kozameh",
"Carlos N.",
""
],
[
"Quiroga",
"Gonzalo",
""
]
] | We give a definition and derive the equations of motion for the center of mass and angular momentum of an axially symmetric, isolated system that emits gravitational and electromagnetic radiation. A central feature of this formulation is the use of Newman-Unti cuts at null infinity that are generated by worldlines of t... |
gr-qc/0003028 | Esposito Giampiero | Giampiero Esposito and Cosimo Stornaiolo | On the ADM Equations for General Relativity | 10 pages, plain Tex. The final version contains new original
calculations | Found.Phys.Lett. 13 (2000) 279-288 | null | DSF preprint 2000/8 | gr-qc | null | The Arnowitt-Deser-Misner (ADM) evolution equations for the induced metric
and the extrinsic-curvature tensor of the spacelike surfaces which foliate the
space-time manifold in canonical general relativity are a first-order system of
quasi-linear partial differential equations, supplemented by the constraint
equation... | [
{
"created": "Wed, 8 Mar 2000 09:37:19 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2000 06:25:37 GMT",
"version": "v2"
},
{
"created": "Tue, 2 May 2000 07:14:14 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Esposito",
"Giampiero",
""
],
[
"Stornaiolo",
"Cosimo",
""
]
] | The Arnowitt-Deser-Misner (ADM) evolution equations for the induced metric and the extrinsic-curvature tensor of the spacelike surfaces which foliate the space-time manifold in canonical general relativity are a first-order system of quasi-linear partial differential equations, supplemented by the constraint equations.... |
gr-qc/9807075 | David Wiltshire | N. Kontoleon and D.L. Wiltshire | Operator ordering and consistency of the wavefunction of the Universe | 9 pages, epsf, revTeX-3.1, 1 figure. In revised version (v2) a new
section etc with additional arguments increases the length of paper by 3
pages of Physical Review; several references added. v3: small typos fixed | Phys.Rev. D59 (1999) 063513 | 10.1103/PhysRevD.59.063513 | ADP-98-43/M71 | gr-qc astro-ph hep-th | null | We demonstrate in the context of the minisuperspace model consisting of a
closed Friedmann-Robertson-Walker universe coupled to a scalar field that
Vilenkin's tunneling wavefunction can only be consistently defined for
particular choices of operator ordering in the Wheeler-DeWitt equation. The
requirement of regulari... | [
{
"created": "Tue, 28 Jul 1998 17:22:29 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Dec 1998 06:43:44 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Mar 1999 02:21:37 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Kontoleon",
"N.",
""
],
[
"Wiltshire",
"D. L.",
""
]
] | We demonstrate in the context of the minisuperspace model consisting of a closed Friedmann-Robertson-Walker universe coupled to a scalar field that Vilenkin's tunneling wavefunction can only be consistently defined for particular choices of operator ordering in the Wheeler-DeWitt equation. The requirement of regularity... |
1805.03069 | Kazem Rezazadeh | K. Fahimi, K. Karami, S. Asadzadeh, K. Rezazadeh | Structure formation in clustering DBI dark energy model with constant
sound speed | 13 pages, 9 figures | MNRAS 481, 2393 (2018) | 10.1093/mnras/sty2416 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of DBI non-canonical scalar field model of dark energy,
we study the growth of dark matter perturbations in the both linear and
non-linear regimes. In our DBI model, we consider the anti-de Sitter warp
factor $f(\phi)=f_0\, \phi^{-4}$ with constant $f_0>0$ and assume the DBI dark
energy to be clu... | [
{
"created": "Sun, 6 May 2018 11:47:08 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Oct 2018 13:14:38 GMT",
"version": "v2"
}
] | 2018-10-30 | [
[
"Fahimi",
"K.",
""
],
[
"Karami",
"K.",
""
],
[
"Asadzadeh",
"S.",
""
],
[
"Rezazadeh",
"K.",
""
]
] | Within the framework of DBI non-canonical scalar field model of dark energy, we study the growth of dark matter perturbations in the both linear and non-linear regimes. In our DBI model, we consider the anti-de Sitter warp factor $f(\phi)=f_0\, \phi^{-4}$ with constant $f_0>0$ and assume the DBI dark energy to be clust... |
0912.4862 | Kirill Bronnikov | K.A. Bronnikov, S.G. Rubin, I.V. Svadkovsky | Multidimensional world, inflation and modern acceleration | 7 two-column revtex pages, 2 figures | Phys.Rev.D81:084010,2010 | 10.1103/PhysRevD.81.084010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from pure multidimensional gravity with curvature-nonlinear terms
but no matter fields in the initial action, we obtain a cosmological model with
two effective scalar fields related to the size of two extra factor spaces. The
model includes both an early inflationary stage and that of modern accelerated
expa... | [
{
"created": "Thu, 24 Dec 2009 13:52:15 GMT",
"version": "v1"
}
] | 2010-04-21 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Rubin",
"S. G.",
""
],
[
"Svadkovsky",
"I. V.",
""
]
] | Starting from pure multidimensional gravity with curvature-nonlinear terms but no matter fields in the initial action, we obtain a cosmological model with two effective scalar fields related to the size of two extra factor spaces. The model includes both an early inflationary stage and that of modern accelerated expans... |
gr-qc/0701125 | Hernando Quevedo | Francisco J. Hernandez and Hernando Quevedo | Entropy and anisotropy | To be published in Gen.Rel.Grav. (Obregon's Festschrift) | Gen.Rel.Grav.39:1297-1309,2007 | 10.1007/s10714-007-0456-9 | null | gr-qc | null | We address the problem of defining the concept of entropy for anisotropic
cosmological models. In particular, we analyze for the Bianchi I and V models
the entropy which follows from postulating the validity of the laws of standard
thermodynamics in cosmology. Moreover, we analyze the Cardy-Verlinde
construction of e... | [
{
"created": "Tue, 23 Jan 2007 01:00:26 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hernandez",
"Francisco J.",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We address the problem of defining the concept of entropy for anisotropic cosmological models. In particular, we analyze for the Bianchi I and V models the entropy which follows from postulating the validity of the laws of standard thermodynamics in cosmology. Moreover, we analyze the Cardy-Verlinde construction of ent... |
gr-qc/0401041 | Gamal Nashed | Gamal G.L. Nashed | Reissner Nordstr$\ddot{o}$m solutions and Energy in teleparallel theory | 12 pages tex file | Mod.Phys.Lett.A21:2241-2250,2006 | 10.1142/S0217732306020445 | null | gr-qc | null | We give three different spherically symmetric spacetimes for the coupled
gravitational and electromagnetic fields with charged source in the tetrad
theory of gravitation. One of these, contains an arbitrary function and
generates the others. These spacetimes give the Reissner Nordstr$\ddot{o}$m
metric black hole. We ... | [
{
"created": "Sun, 11 Jan 2004 06:00:23 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jan 2006 08:37:25 GMT",
"version": "v2"
}
] | 2010-11-05 | [
[
"Nashed",
"Gamal G. L.",
""
]
] | We give three different spherically symmetric spacetimes for the coupled gravitational and electromagnetic fields with charged source in the tetrad theory of gravitation. One of these, contains an arbitrary function and generates the others. These spacetimes give the Reissner Nordstr$\ddot{o}$m metric black hole. We th... |
1307.7685 | Francois Foucart | Francois Foucart, Luisa Buchman, Matthew D. Duez, Michael Grudich,
Lawrence E. Kidder, Ilana MacDonald, Abdul Mroue, Harald P. Pfeiffer, Mark A.
Scheel and Bela Szilagyi | First direct comparison of non-disrupting neutron star-black hole and
binary black hole merger simulations | 13 pages, 9 figures | null | 10.1103/PhysRevD.88.064017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first direct comparison of numerical simulations of neutron
star-black hole and black hole-black hole mergers in full general relativity.
We focus on a configuration with non spinning objects and within the most
likely range of mass ratio for neutron star-black hole systems (q=6). In this
region of the... | [
{
"created": "Mon, 29 Jul 2013 19:11:34 GMT",
"version": "v1"
}
] | 2013-09-18 | [
[
"Foucart",
"Francois",
""
],
[
"Buchman",
"Luisa",
""
],
[
"Duez",
"Matthew D.",
""
],
[
"Grudich",
"Michael",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"MacDonald",
"Ilana",
""
],
[
"Mroue",
"Abdul",
""
]... | We present the first direct comparison of numerical simulations of neutron star-black hole and black hole-black hole mergers in full general relativity. We focus on a configuration with non spinning objects and within the most likely range of mass ratio for neutron star-black hole systems (q=6). In this region of the p... |
1612.04002 | Miguel Sabido | Javier Chagoya and M. Sabido | Self-Dual Gravity and the Immirzi parameter | 7 pages, no figures, RevTex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Working in the first order formalism of gravity, we propose an action that
combines the self and anti-self-dual parts of the curvature and comprises all
the diffeomorphism invariant Lagrangians that one can consider in this
formalism. The action that we propose is motivated by (A)dS gauge theories of
gravity. We use ... | [
{
"created": "Tue, 13 Dec 2016 02:58:35 GMT",
"version": "v1"
}
] | 2016-12-14 | [
[
"Chagoya",
"Javier",
""
],
[
"Sabido",
"M.",
""
]
] | Working in the first order formalism of gravity, we propose an action that combines the self and anti-self-dual parts of the curvature and comprises all the diffeomorphism invariant Lagrangians that one can consider in this formalism. The action that we propose is motivated by (A)dS gauge theories of gravity. We use th... |
gr-qc/0406098 | Vakif Onemli K | V. K. Onemli and R. P. Woodard | Quantum effects can render w<-1 on cosmological scales | 9 pages, references added | Phys.Rev. D70 (2004) 107301 | 10.1103/PhysRevD.70.107301 | LPT-ORSAY 04-47, UFIFT-QG-04-1 | gr-qc astro-ph hep-ph | null | We report on a revision of our previous computation of the renormalized
expectation value of the stress-energy tensor of a massless, minimally coupled
scalar with a quartic self-interaction on a locally de Sitter background. This
model is important because it demonstrates that quantum effects can lead to
violations o... | [
{
"created": "Thu, 24 Jun 2004 11:45:55 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jul 2004 14:44:06 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Onemli",
"V. K.",
""
],
[
"Woodard",
"R. P.",
""
]
] | We report on a revision of our previous computation of the renormalized expectation value of the stress-energy tensor of a massless, minimally coupled scalar with a quartic self-interaction on a locally de Sitter background. This model is important because it demonstrates that quantum effects can lead to violations of ... |
1212.5053 | Enrico Barausse | Enrico Barausse, Carlos Palenzuela, Marcelo Ponce and Luis Lehner | Neutron-star mergers in scalar-tensor theories of gravity | 5 pages, 4 figures. One simulation highlighting a new physical effect
has been added (cf. Fig 4) and the text has been modified, to match the
version accepted for publication in PRD Rapid Communications | Phys. Rev. D 87, 081506(R) (2013) | 10.1103/PhysRevD.87.081506 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories of gravity are natural phenomenological alternatives
to General Relativity, where the gravitational interaction is mediated by a
scalar degree of freedom, besides the usual tensor gravitons. In regions of the
parameter space of these theories where constraints from both solar system
experiments... | [
{
"created": "Thu, 20 Dec 2012 14:30:05 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Apr 2013 14:39:42 GMT",
"version": "v2"
}
] | 2013-04-29 | [
[
"Barausse",
"Enrico",
""
],
[
"Palenzuela",
"Carlos",
""
],
[
"Ponce",
"Marcelo",
""
],
[
"Lehner",
"Luis",
""
]
] | Scalar-tensor theories of gravity are natural phenomenological alternatives to General Relativity, where the gravitational interaction is mediated by a scalar degree of freedom, besides the usual tensor gravitons. In regions of the parameter space of these theories where constraints from both solar system experiments a... |
2212.07463 | Philippe G. LeFloch | Philippe G. LeFloch and Yue Ma | Nonlinear stability of self-gravitating massive fields. A
wave-Klein-Gordon model | 36 pages. arXiv admin note: text overlap with arXiv:1712.10045 | null | 10.1088/1361-6382/acde31 | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | Significant advances were made in recent years on the global evolution
problem for self-gravitating massive matter in the small-perturbative regime
close to Minkowski spacetime. To study the coupling between a Klein-Gordon
equation and Einstein's field equations, we introduced the
``Euclidean-hyperboloidal foliation ... | [
{
"created": "Wed, 14 Dec 2022 19:14:43 GMT",
"version": "v1"
}
] | 2023-07-12 | [
[
"LeFloch",
"Philippe G.",
""
],
[
"Ma",
"Yue",
""
]
] | Significant advances were made in recent years on the global evolution problem for self-gravitating massive matter in the small-perturbative regime close to Minkowski spacetime. To study the coupling between a Klein-Gordon equation and Einstein's field equations, we introduced the ``Euclidean-hyperboloidal foliation me... |
1502.04507 | Amin Salehi | Amin Salehi and S. Aftabi | Searching for a Cosmological Preferred Axis in complicated class of
cosmological models:Case study $f(R,T)$ model | 40 page 25 fig. arXiv admin note: text overlap with arXiv:1303.0961,
arXiv:1302.1866, arXiv:1411.1466, arXiv:1107.5807, arXiv:1306.3164 by other
authors | JHEP 1609(2016)140 | 10.1007/JHEP09(2016)140 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent astronomical observations show that the universe may be anisotropic on
large scales. The Union2 SnIa data hint that the universe has a preferred
direction. If such a cosmological privileged axis indeed exists, one has to
consider an anisotropic expanding Universe instead of the isotropic
cosmological model. In... | [
{
"created": "Mon, 16 Feb 2015 12:17:40 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Feb 2015 05:25:10 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Mar 2016 14:04:23 GMT",
"version": "v3"
},
{
"created": "Sun, 17 Jul 2016 20:49:25 GMT",
"version": "v4"
}
] | 2019-07-03 | [
[
"Salehi",
"Amin",
""
],
[
"Aftabi",
"S.",
""
]
] | Recent astronomical observations show that the universe may be anisotropic on large scales. The Union2 SnIa data hint that the universe has a preferred direction. If such a cosmological privileged axis indeed exists, one has to consider an anisotropic expanding Universe instead of the isotropic cosmological model. In t... |
1904.07191 | Grigoris Panotopoulos | Il\'idio Lopes and Grigoris Panotopoulos | Radial oscillations of boson stars made of ultralight repulsive dark
matter | References added | Nucl. Phys. B961 (2020) 115266 | 10.1016/j.nuclphysb.2020.115266 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the lowest frequency radial oscillation modes of boson stars. It
is assumed that the object is made of pseudo-Goldstone bosons subjected to a
scalar potential that leads to a repulsive self-interaction force, and which is
characterized by two unknown mass scales $m$ (mass of the particle) and $F$
(decay co... | [
{
"created": "Mon, 15 Apr 2019 17:05:44 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2019 16:21:15 GMT",
"version": "v2"
}
] | 2020-12-15 | [
[
"Lopes",
"Ilídio",
""
],
[
"Panotopoulos",
"Grigoris",
""
]
] | We compute the lowest frequency radial oscillation modes of boson stars. It is assumed that the object is made of pseudo-Goldstone bosons subjected to a scalar potential that leads to a repulsive self-interaction force, and which is characterized by two unknown mass scales $m$ (mass of the particle) and $F$ (decay cons... |
0712.3188 | Alexander E. Shalyt-Margolin | A. E. Shalyt-Margolin | Vacuum Energy Problem, Fundamental Length and Deformed Quantum Field
Theory | 12 pages | null | null | null | gr-qc | null | The cosmological constant (vacuum energy) problem is analyzed within the
scope of quantum theories with UV-cut-off or fundamental length. Various cases
associated with the appearance of the latter are considered both using the
Generalized Uncertainty Relations and the deformed density matrix,previously
introduced in ... | [
{
"created": "Wed, 19 Dec 2007 13:53:03 GMT",
"version": "v1"
}
] | 2007-12-20 | [
[
"Shalyt-Margolin",
"A. E.",
""
]
] | The cosmological constant (vacuum energy) problem is analyzed within the scope of quantum theories with UV-cut-off or fundamental length. Various cases associated with the appearance of the latter are considered both using the Generalized Uncertainty Relations and the deformed density matrix,previously introduced in th... |
2406.10644 | Ivan Arraut Dr. | Ivan Arraut | The solution to the Black Hole information paradox | 5 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The information paradox suggests that the black hole loses information when
it emits radiation. In this way, the spectrum of radiation corresponds to a
mixed (non-pure) quantum state even if the internal state generating the
black-hole is expected to be pure in essence. In this paper we propose an
argument solving th... | [
{
"created": "Sat, 15 Jun 2024 14:20:06 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Arraut",
"Ivan",
""
]
] | The information paradox suggests that the black hole loses information when it emits radiation. In this way, the spectrum of radiation corresponds to a mixed (non-pure) quantum state even if the internal state generating the black-hole is expected to be pure in essence. In this paper we propose an argument solving this... |
2307.12758 | Bayram Tekin | Bayram Tekin | A Tribute to S. Deser: Conserved Quantities in Generic Gravity Theories | 1 figure, 38 pages, includes a brief reminiscence of the author about
S.Deser, a reference added in v2 | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I describe parts of my joint work with S. Deser [March 19, 1931 - April 21,
2023] which started when I was working as a post-doc at Brandeis University in
2001. Our work was mostly, but not exclusively, on conserved charges of higher
curvature theories of gravity. I also describe some recent developments, such
as exp... | [
{
"created": "Mon, 24 Jul 2023 13:03:09 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Aug 2023 10:17:40 GMT",
"version": "v2"
}
] | 2023-08-16 | [
[
"Tekin",
"Bayram",
""
]
] | I describe parts of my joint work with S. Deser [March 19, 1931 - April 21, 2023] which started when I was working as a post-doc at Brandeis University in 2001. Our work was mostly, but not exclusively, on conserved charges of higher curvature theories of gravity. I also describe some recent developments, such as expre... |
1910.08708 | Swetha Bhagwat | Swetha Bhagwat, Xisco Jimenez Forteza, Paolo Pani, Valeria Ferrari | Ringdown overtones, black hole spectroscopy, and no-hair theorem tests | 19 pages, 18 figures (updated to the version in PRD) | Phys. Rev. D 101, 044033 (2020) | 10.1103/PhysRevD.101.044033 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Validating the black-hole no-hair theorem with gravitational-wave
observations of compact binary coalescences provides a compelling argument that
the remnant object is indeed a black hole as described by the general theory of
relativity. This requires performing a spectroscopic analysis of the
post-merger signal and ... | [
{
"created": "Sat, 19 Oct 2019 06:01:56 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jan 2020 14:34:54 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"Bhagwat",
"Swetha",
""
],
[
"Forteza",
"Xisco Jimenez",
""
],
[
"Pani",
"Paolo",
""
],
[
"Ferrari",
"Valeria",
""
]
] | Validating the black-hole no-hair theorem with gravitational-wave observations of compact binary coalescences provides a compelling argument that the remnant object is indeed a black hole as described by the general theory of relativity. This requires performing a spectroscopic analysis of the post-merger signal and re... |
2201.13146 | Stavros Venikoudis | S.A. Venikoudis (Aristotle U., Thessaloniki), K.V. Fasoulakos
(Aristotle U., Thessaloniki), F.P. Fronimos (Aristotle U., Thessaloniki) | Late-time Cosmology of scalar field assisted $f(\mathcal{G})$ gravity | IJMPD Accepted | null | 10.1142/S0218271822500389 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work we present the late-time behaviour of the Universe in the
context of Einstein-Gauss-Bonnet gravitational theory. The theory involves a
scalar field, which represents low-effective quantum corrections, assisted by a
function $f(\mathcal{G})$ solely depending from the Gauss-Bonnet topological
invariant $\m... | [
{
"created": "Mon, 31 Jan 2022 11:45:23 GMT",
"version": "v1"
}
] | 2022-04-19 | [
[
"Venikoudis",
"S. A.",
"",
"Aristotle U., Thessaloniki"
],
[
"Fasoulakos",
"K. V.",
"",
"Aristotle U., Thessaloniki"
],
[
"Fronimos",
"F. P.",
"",
"Aristotle U., Thessaloniki"
]
] | In this work we present the late-time behaviour of the Universe in the context of Einstein-Gauss-Bonnet gravitational theory. The theory involves a scalar field, which represents low-effective quantum corrections, assisted by a function $f(\mathcal{G})$ solely depending from the Gauss-Bonnet topological invariant $\mat... |
2305.02196 | Benrong Mu | Yiqian He, Benrong Mu | Thermodynamic instabilities of Kerr-Newman Ads black holes | 10 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In~\cite{Johnson:2019mdp}, Clifford put forward that the specific heat at
constant volume $C_{V}$ is always negetive for the super-entropy black hole.
Later in~\cite{Cong:2019bud}, Robert et al. found $C_{V}>0$ in certain region
for the generalized exotic BTZ black holes. Futhermore, they proposed a new
conjecture th... | [
{
"created": "Tue, 2 May 2023 14:48:53 GMT",
"version": "v1"
}
] | 2023-05-04 | [
[
"He",
"Yiqian",
""
],
[
"Mu",
"Benrong",
""
]
] | In~\cite{Johnson:2019mdp}, Clifford put forward that the specific heat at constant volume $C_{V}$ is always negetive for the super-entropy black hole. Later in~\cite{Cong:2019bud}, Robert et al. found $C_{V}>0$ in certain region for the generalized exotic BTZ black holes. Futhermore, they proposed a new conjecture that... |
2302.14183 | Zhaoyi Xu | Zhaoyi Xu | Semi-classical rotating black hole in loop quantum gravity | 5 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the research paper [1], the analytical solution of semi-classical rotating
black holes (BH) in loop quantum gravity theory (LQG) is obtained, but an
unknown function $H$ is still preserved. In this note, we obtain an expression
for the unknown function $H$, which makes the space-time line element of the
semi-class... | [
{
"created": "Mon, 27 Feb 2023 22:47:58 GMT",
"version": "v1"
}
] | 2023-03-01 | [
[
"Xu",
"Zhaoyi",
""
]
] | In the research paper [1], the analytical solution of semi-classical rotating black holes (BH) in loop quantum gravity theory (LQG) is obtained, but an unknown function $H$ is still preserved. In this note, we obtain an expression for the unknown function $H$, which makes the space-time line element of the semi-classic... |
2211.05956 | Rui-Yun Guo | Tian-Ying Yao, Rui-Yun Guo, Xin-Yue Zhao | Constraining neutrino mass in dynamical dark energy cosmologies with the
logarithm parametrization and the oscillating parametrization | 11 pages,4 figures | Journal of High Energy Physics, Gravitation and Cosmology, 2023 | 10.4236/jhepgc.2023.94076 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We constrain two dynamical dark energy models that are parametrized by the
logarithm form of $w(z)=w_{0}+w_{1}\left(\frac{\ln (2+z)}{1+z}-\ln 2\right)$
and the oscillating form of
$w(z)=w_{0}+w_{1}\left(\frac{\sin(1+z)}{1+z}-\sin(1)\right)$. Comparing with
the Chevallier-Polarski-Linder (CPL) model, the two parametri... | [
{
"created": "Fri, 11 Nov 2022 02:07:19 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2023 04:39:29 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Sep 2023 07:20:41 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Nov 2023 07:07:33 GMT",
"version": "v4"
}
] | 2023-11-28 | [
[
"Yao",
"Tian-Ying",
""
],
[
"Guo",
"Rui-Yun",
""
],
[
"Zhao",
"Xin-Yue",
""
]
] | We constrain two dynamical dark energy models that are parametrized by the logarithm form of $w(z)=w_{0}+w_{1}\left(\frac{\ln (2+z)}{1+z}-\ln 2\right)$ and the oscillating form of $w(z)=w_{0}+w_{1}\left(\frac{\sin(1+z)}{1+z}-\sin(1)\right)$. Comparing with the Chevallier-Polarski-Linder (CPL) model, the two parametriza... |
1901.04307 | L\'eo Bernus | L. Bernus, O. Minazzoli, A. Fienga, M. Gastineau, J. Laskar, P. Deram | Constraining the mass of the graviton with the planetary ephemeris INPOP | New version. Technical details moved into Supplemental Materials.
Author Pierre Deram added. Interpretation in terms of fifth force added.
Minor corrections. 8 pages. 4 figures. 2 tables | Phys. Rev. Lett. 123, 161103 (2019) | 10.1103/PhysRevLett.123.161103 | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the planetary ephemeris INPOP17b to constrain the mass of the graviton
in the Newtonian limit. We also give an interpretation of this result for a
specific case of fifth force framework. We find that the residuals for the
Cassini spacecraft significantly (90\% C.L.) degrade for Compton wavelengths of
the gravi... | [
{
"created": "Wed, 9 Jan 2019 15:22:19 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Aug 2019 11:51:59 GMT",
"version": "v2"
}
] | 2019-10-23 | [
[
"Bernus",
"L.",
""
],
[
"Minazzoli",
"O.",
""
],
[
"Fienga",
"A.",
""
],
[
"Gastineau",
"M.",
""
],
[
"Laskar",
"J.",
""
],
[
"Deram",
"P.",
""
]
] | We use the planetary ephemeris INPOP17b to constrain the mass of the graviton in the Newtonian limit. We also give an interpretation of this result for a specific case of fifth force framework. We find that the residuals for the Cassini spacecraft significantly (90\% C.L.) degrade for Compton wavelengths of the gravito... |
0807.2186 | S. Mignemi | S. Mignemi | Triply special relativity from six dimensions | 7 pages, plain TeX | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the generalization of Doubly Special Relativity to a curved de
Sitter background can be obtained starting from a six-dimensional spacetime on
which quadratic constraints on position and momentum coordinates are imposed.
| [
{
"created": "Mon, 14 Jul 2008 15:50:06 GMT",
"version": "v1"
}
] | 2008-07-15 | [
[
"Mignemi",
"S.",
""
]
] | We show that the generalization of Doubly Special Relativity to a curved de Sitter background can be obtained starting from a six-dimensional spacetime on which quadratic constraints on position and momentum coordinates are imposed. |
0906.4380 | Alexis Larranaga | Andres Castillo, Alexis Larranaga | Entropy for Black Holes in the Deformed Horava-Lifshitz Gravity | 7 pages, 4 figures | Electron.J.Theor.Phys.8:1-10,2011 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the entropy of black holes in the deformed Horava-Lifshitz gravity
with coupling constant lambda. For lambda=1, the black hole resembles the
Reissner-Norstrom black hole with a geometric parameter acting like the
electric charge. Therefore, we obtain some differences in the entropy when
comparing with the Sc... | [
{
"created": "Wed, 24 Jun 2009 00:03:01 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jun 2009 14:18:18 GMT",
"version": "v2"
}
] | 2011-05-05 | [
[
"Castillo",
"Andres",
""
],
[
"Larranaga",
"Alexis",
""
]
] | We study the entropy of black holes in the deformed Horava-Lifshitz gravity with coupling constant lambda. For lambda=1, the black hole resembles the Reissner-Norstrom black hole with a geometric parameter acting like the electric charge. Therefore, we obtain some differences in the entropy when comparing with the Schw... |
1111.0924 | Joel Saavedra | Norman Cruz, Marco Olivares, Joel Saavedra and J.R. Villanueva | Null geodesics in the Reissner-Nordstr\"om Anti-de Sitter black holes | 13 pages, 10 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we address the study of null geodesics in the background of
Reissner-Nordstr\"om Anti de Sitter black holes. We compute the exact
trajectories in terms of elliptic functions of Weierstrass, obtaining a
detailed description of the orbits in terms of charge, mass and the
cosmological constant. The trajecto... | [
{
"created": "Thu, 3 Nov 2011 17:34:24 GMT",
"version": "v1"
}
] | 2011-11-04 | [
[
"Cruz",
"Norman",
""
],
[
"Olivares",
"Marco",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Villanueva",
"J. R.",
""
]
] | In this work we address the study of null geodesics in the background of Reissner-Nordstr\"om Anti de Sitter black holes. We compute the exact trajectories in terms of elliptic functions of Weierstrass, obtaining a detailed description of the orbits in terms of charge, mass and the cosmological constant. The trajectori... |
2110.09503 | Michael Toomey | Stephon Alexander, Steven J. Clark, Gabriel Herczeg, and Michael W.
Toomey | Black hole and cosmological analysis of BF sequestered gravity | 11 pages, 3 figures | null | 10.1103/PhysRevD.105.044001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a minimal extension of a recently proposed modification of general
relativity that draws on concepts from topological field theory to resolve
aspects of the cosmological constant problem. In the original model, the field
content of general relativity was augmented to include a gauge field and an
adjoint-valu... | [
{
"created": "Mon, 18 Oct 2021 17:51:15 GMT",
"version": "v1"
}
] | 2022-02-16 | [
[
"Alexander",
"Stephon",
""
],
[
"Clark",
"Steven J.",
""
],
[
"Herczeg",
"Gabriel",
""
],
[
"Toomey",
"Michael W.",
""
]
] | We study a minimal extension of a recently proposed modification of general relativity that draws on concepts from topological field theory to resolve aspects of the cosmological constant problem. In the original model, the field content of general relativity was augmented to include a gauge field and an adjoint-valued... |
2107.11193 | Grigory Volovik | G.E. Volovik | Effect of the inner horizon on the black hole thermodynamics:
Reissner-Nordstr\"om black hole and Kerr black hole | 7 pages, no figures, accepted in Mod. Phys. Lett. A | null | null | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the Schwarzschild black hole the Bekenstein-Hawking entropy is
proportional to the area of the event horizon. For the black holes with two
horizons the thermodynamics is not very clear, since the role of the inner
horizons is not well established. Here we calculate the entropy of the
Reissner-Nordstr\"om black ho... | [
{
"created": "Wed, 21 Jul 2021 08:07:41 GMT",
"version": "v1"
}
] | 2021-07-26 | [
[
"Volovik",
"G. E.",
""
]
] | For the Schwarzschild black hole the Bekenstein-Hawking entropy is proportional to the area of the event horizon. For the black holes with two horizons the thermodynamics is not very clear, since the role of the inner horizons is not well established. Here we calculate the entropy of the Reissner-Nordstr\"om black hole... |
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