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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1702.00306 | Artur Alho | Artur Alho, Claes Uggla | Inflationary $\alpha$-attractor cosmology: A global dynamical systems
perspective | 15 pages, 11 figures. Matches published version | Phys. Rev. D 95, 083517 (2017) | 10.1103/PhysRevD.95.083517 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study flat FLRW $\alpha$-attractor $\mathrm{E}$- and $\mathrm{T}$-models
by introducing a dynamical systems framework that yields regularized
unconstrained field equations on two-dimensional compact state spaces. This
results in both illustrative figures and a complete description of the entire
solution spaces of ... | [
{
"created": "Wed, 1 Feb 2017 15:13:28 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Apr 2017 11:47:41 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"Alho",
"Artur",
""
],
[
"Uggla",
"Claes",
""
]
] | We study flat FLRW $\alpha$-attractor $\mathrm{E}$- and $\mathrm{T}$-models by introducing a dynamical systems framework that yields regularized unconstrained field equations on two-dimensional compact state spaces. This results in both illustrative figures and a complete description of the entire solution spaces of th... |
gr-qc/0205067 | Simon Judes | Simon Judes, Matt Visser | Conservation Laws in Doubly Special Relativity | V2: Extensive revisions: merged with gr-qc/0205093, new author added,
references added, discussion amplified. 4 pages, revtex4; V3: Revised in
response to referee comments; no physics changes; version to appear in
Physical Review D | Phys.Rev.D68:045001,2003 | 10.1103/PhysRevD.68.045001 | null | gr-qc astro-ph hep-ph | null | Motivated by various theoretical arguments that the Planck energy (Ep - 10^19
GeV) - should herald departures from Lorentz invariance, and the possibility of
testing these expectations in the not too distant future, two so-called "Doubly
Special Relativity" theories have been suggested -- the first by
Amelino-Camelia... | [
{
"created": "Thu, 16 May 2002 09:52:04 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jun 2002 08:06:37 GMT",
"version": "v2"
},
{
"created": "Fri, 16 May 2003 19:24:24 GMT",
"version": "v3"
}
] | 2011-06-15 | [
[
"Judes",
"Simon",
""
],
[
"Visser",
"Matt",
""
]
] | Motivated by various theoretical arguments that the Planck energy (Ep - 10^19 GeV) - should herald departures from Lorentz invariance, and the possibility of testing these expectations in the not too distant future, two so-called "Doubly Special Relativity" theories have been suggested -- the first by Amelino-Camelia (... |
1810.00423 | Shirin Khodabakhshi | Sh. Khodabakhshi (Tehran U.), M. Farhang (Shahid Beheshti U.), A.
Shojai (Tehran U.), M. S. Esmaeilian (Shahid Beheshti U.), R. Moti (Ferdowsi
U.) | Observational assessment of the viability of de Sitter-G\"odel-de Sitter
phase transition | null | Gen.Rel.Grav. 54 (2022) 160 | 10.1007/s10714-022-03046-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | de Sitter--G\"odel--de Sitter phase transition(dGd) is a possible geometrical
phase transition in the very early universe. It induces fluctuations with
possibly observable traces on matter and radiation fields. Here we present a
simulation based on dGd to investigate possible perturbations which could be
along with t... | [
{
"created": "Sun, 30 Sep 2018 17:15:13 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Aug 2019 22:26:03 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Oct 2021 18:28:02 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Nov 2021 15:43:05 GMT",
"version": "v4"
},
{
"c... | 2022-12-19 | [
[
"Khodabakhshi",
"Sh.",
"",
"Tehran U."
],
[
"Farhang",
"M.",
"",
"Shahid Beheshti U."
],
[
"Shojai",
"A.",
"",
"Tehran U."
],
[
"Esmaeilian",
"M. S.",
"",
"Shahid Beheshti U."
],
[
"Moti",
"R.",
"",
"Ferdowsi\n U."
... | de Sitter--G\"odel--de Sitter phase transition(dGd) is a possible geometrical phase transition in the very early universe. It induces fluctuations with possibly observable traces on matter and radiation fields. Here we present a simulation based on dGd to investigate possible perturbations which could be along with the... |
1907.08957 | David McNutt | D. McNutt, A. Coley, L. Wylleman, S. Hervik | Locally Boost Isotropic Spacetimes and the Type ${\bf D}^k$ Condition | 25 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the class of locally boost isotropic spacetimes in arbitrary
dimension. For any spacetime with boost isotropy, the corresponding curvature
tensor and all of its covariant derivatives must be simultaneously of alignment
type ${\bf D}$ relative to some common null frame. Such spacetimes are known as
type ${... | [
{
"created": "Sun, 21 Jul 2019 11:24:39 GMT",
"version": "v1"
}
] | 2019-07-23 | [
[
"McNutt",
"D.",
""
],
[
"Coley",
"A.",
""
],
[
"Wylleman",
"L.",
""
],
[
"Hervik",
"S.",
""
]
] | We consider the class of locally boost isotropic spacetimes in arbitrary dimension. For any spacetime with boost isotropy, the corresponding curvature tensor and all of its covariant derivatives must be simultaneously of alignment type ${\bf D}$ relative to some common null frame. Such spacetimes are known as type ${\b... |
2107.01146 | Ernesto Contreras | A. Ramos, C. Arias, R. \'Avalos, E. Contreras | Geodesic motion around hairy black holes | null | Annals Phys. 431, 168557 (2021) | 10.1016/j.aop.2021.168557 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper (Phys. Dark Univ. {\bf 31}, 100744 (2021)) it has been
obtained new static black hole solutions with primary hairs by the
Gravitational Decoupling. In this work we either study the geodesic motion of
massive and massless particles around those solutions and restrict the values
of the primary hairs b... | [
{
"created": "Fri, 2 Jul 2021 15:43:07 GMT",
"version": "v1"
}
] | 2021-07-14 | [
[
"Ramos",
"A.",
""
],
[
"Arias",
"C.",
""
],
[
"Ávalos",
"R.",
""
],
[
"Contreras",
"E.",
""
]
] | In a recent paper (Phys. Dark Univ. {\bf 31}, 100744 (2021)) it has been obtained new static black hole solutions with primary hairs by the Gravitational Decoupling. In this work we either study the geodesic motion of massive and massless particles around those solutions and restrict the values of the primary hairs by ... |
2004.00770 | Jing-Bo Wang | Jingbo Wang | Hawking Radiation Is Pure | Essay written for the Gravity Research Foundation 2020 Awards for
Essays on Gravitation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Information loss paradox is still a challenging problem in theoretical
physics. In this essay, for statics BTZ black holes and Schwarzschild black
holes, we propose a simple solution based on the similarity between black holes
and topological insulators. That is, the Hawking radiation is pure due to the
entanglement ... | [
{
"created": "Thu, 2 Apr 2020 01:49:52 GMT",
"version": "v1"
}
] | 2020-04-03 | [
[
"Wang",
"Jingbo",
""
]
] | Information loss paradox is still a challenging problem in theoretical physics. In this essay, for statics BTZ black holes and Schwarzschild black holes, we propose a simple solution based on the similarity between black holes and topological insulators. That is, the Hawking radiation is pure due to the entanglement be... |
2309.01760 | Chiranjeeb Singha | Chiranjeeb Singha, Shauvik Biswas | Galactic Pure Lovelock Blackholes: Geometry, stability, and Hawking
temperature | 19 pages, 3 figures | Phys.Rev.D 109 (2024) 2, 024043 | 10.1103/PhysRevD.109.024043 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article, we will first-time model galactic black holes in pure
Lovelock gravity. Even though working with higher spacetime dimensions, we
assume (implicitly) the Hernquist-type mass profile for the galaxy in such a
way that the horizon structure of a pure LoveLock black hole remains intact. In
this way, we wi... | [
{
"created": "Mon, 4 Sep 2023 18:37:39 GMT",
"version": "v1"
},
{
"created": "Sun, 19 May 2024 11:31:37 GMT",
"version": "v2"
}
] | 2024-05-21 | [
[
"Singha",
"Chiranjeeb",
""
],
[
"Biswas",
"Shauvik",
""
]
] | In this article, we will first-time model galactic black holes in pure Lovelock gravity. Even though working with higher spacetime dimensions, we assume (implicitly) the Hernquist-type mass profile for the galaxy in such a way that the horizon structure of a pure LoveLock black hole remains intact. In this way, we will... |
gr-qc/0402006 | Orfeu Bertolami | Orfeu Bertolami | Translational Invariance and Noncommutative Field Theories | 10 pages; Invited talk at the Qauntum Gravity Phenomenology section
of the Tenth Marcel Grossmann Meeting on General Relativity, Rio de Janeiro,
Brazil, 20-26 July, 2003 | null | 10.1142/9789812704030_0284 | null | gr-qc | null | Implications of noncommutative field theories with commutator of the
coordinates of the form $[x^{\mu},x^{\nu}]=i \Lambda_{\quad \omega}^{\mu
\nu}x^{\omega}$with nilpotent structure constants are investigated. It is shown
that a free quantum field theory is not affected by noncommutativity, but that
invariance under ... | [
{
"created": "Mon, 2 Feb 2004 14:41:12 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Bertolami",
"Orfeu",
""
]
] | Implications of noncommutative field theories with commutator of the coordinates of the form $[x^{\mu},x^{\nu}]=i \Lambda_{\quad \omega}^{\mu \nu}x^{\omega}$with nilpotent structure constants are investigated. It is shown that a free quantum field theory is not affected by noncommutativity, but that invariance under tr... |
2002.01974 | Gil de Oliveira-Neto | G. A. Monerat, C. G. M. Santos, G. Oliveira-Neto, E. V. Corr\^ea Silva
and L. G. Ferreira Filho | The dynamics of the early universe in a model with radiation and a
generalized Chaplygin gas | In that new version, we removed a section and four figures. It has,
now, 30 pages and 13 figures | The European Physical Journal Plus volume 136, Article number: 34
(2021) | 10.1140/epjp/s13360-020-00996-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early universe is modeled through the quantization of a
Friedmann-Robertson-Walker model with positive curvature of the spatial
hypersurfaces. In this model, the universe is filled by two fluids: radiation
and a generalized Chaplygin gas. The quantization of this model is made
following the prescriptions due to J... | [
{
"created": "Wed, 5 Feb 2020 19:54:38 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jul 2020 21:25:11 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Nov 2020 15:14:42 GMT",
"version": "v3"
}
] | 2021-01-26 | [
[
"Monerat",
"G. A.",
""
],
[
"Santos",
"C. G. M.",
""
],
[
"Oliveira-Neto",
"G.",
""
],
[
"Silva",
"E. V. Corrêa",
""
],
[
"Filho",
"L. G. Ferreira",
""
]
] | The early universe is modeled through the quantization of a Friedmann-Robertson-Walker model with positive curvature of the spatial hypersurfaces. In this model, the universe is filled by two fluids: radiation and a generalized Chaplygin gas. The quantization of this model is made following the prescriptions due to J. ... |
2104.11705 | Mohammed Khalil | Mohammed Khalil, Alessandra Buonanno, Jan Steinhoff, Justin Vines | Radiation-reaction force and multipolar waveforms for eccentric,
spin-aligned binaries in the effective-one-body formalism | 27 pages. v2: fixed typos, matches published version | Phys. Rev. D 104, 024046 (2021) | 10.1103/PhysRevD.104.024046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While most binary inspirals are expected to have circularized before they
enter the LIGO/Virgo frequency band, a small fraction of those binaries could
have non-negligible orbital eccentricity depending on their formation channel.
Hence, it is important to accurately model eccentricity effects in waveform
models used... | [
{
"created": "Fri, 23 Apr 2021 16:48:42 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2021 22:21:41 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Khalil",
"Mohammed",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Vines",
"Justin",
""
]
] | While most binary inspirals are expected to have circularized before they enter the LIGO/Virgo frequency band, a small fraction of those binaries could have non-negligible orbital eccentricity depending on their formation channel. Hence, it is important to accurately model eccentricity effects in waveform models used t... |
2211.05145 | Niklas Becker | Niklas Becker, Laura Sagunski | Comparing Accretion Disks and Dark Matter Spikes in Intermediate Mass
Ratio Inspirals | 16 pages, 8 figures. Submitted to PRD. Code available online at
http://github.com/DMGW-Goethe/imripy | null | 10.1103/PhysRevD.107.083003 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Intermediate Mass Ratio Inspirals (IMRIs) will be observable with space-based
gravitational wave detectors such as the Laser Interferometer Space Antenna
(LISA). To this end, the environmental effects in such systems have to be
modeled and understood. These effects can include (baryonic) accretion disks
and dark matt... | [
{
"created": "Wed, 9 Nov 2022 19:00:07 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Mar 2023 14:51:47 GMT",
"version": "v2"
}
] | 2023-04-19 | [
[
"Becker",
"Niklas",
""
],
[
"Sagunski",
"Laura",
""
]
] | Intermediate Mass Ratio Inspirals (IMRIs) will be observable with space-based gravitational wave detectors such as the Laser Interferometer Space Antenna (LISA). To this end, the environmental effects in such systems have to be modeled and understood. These effects can include (baryonic) accretion disks and dark matter... |
gr-qc/0608138 | Archana Pai | Archana Pai | Optimal Source Tracking and Beaming of LISA | 8 pages, 9 figures. To appear in the proceedings of Sixth
International LISA Symposium | null | 10.1063/1.2405088 | null | gr-qc | null | We revisit the directionally optimal data streams of LISA first introduced in
Nayak etal. It was shown that by using appropriate choice of Time delay
interferometric (TDI) combinations, a monochromatic fixed source in the
barycentric frame can be optimally tracked in the LISA frame. In this work, we
study the beaming... | [
{
"created": "Thu, 31 Aug 2006 10:29:40 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Pai",
"Archana",
""
]
] | We revisit the directionally optimal data streams of LISA first introduced in Nayak etal. It was shown that by using appropriate choice of Time delay interferometric (TDI) combinations, a monochromatic fixed source in the barycentric frame can be optimally tracked in the LISA frame. In this work, we study the beaming p... |
2209.12058 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | Nonoscillatory gravitational quasinormal modes and telling tails for
Schwarzschild-de Sitter black holes | 8 pages, 3 figures | Phys. Rev. D 106, 124004 (2022) | 10.1103/PhysRevD.106.124004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the quasinormal spectrum of gravitational perturbations of
Schwarzschild - de Sitter black holes contains a new branch of purely imaginary
modes. These modes are not algebraically special and we showed that the sum of
them form the well-known in the literature exponential asymptotic tail. When
the ratio ... | [
{
"created": "Sat, 24 Sep 2022 17:56:38 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Dec 2022 15:30:33 GMT",
"version": "v2"
}
] | 2022-12-05 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We show that the quasinormal spectrum of gravitational perturbations of Schwarzschild - de Sitter black holes contains a new branch of purely imaginary modes. These modes are not algebraically special and we showed that the sum of them form the well-known in the literature exponential asymptotic tail. When the ratio of... |
gr-qc/0703022 | Norbert Van den Bergh | B. Bastiaensen, H. R. Karimian, N. Van den Bergh and L. Wylleman | Purely radiative perfect fluids | 12 pages, minor grammatical changes | Class.Quant.Grav.24:3211-3220,2007 | 10.1088/0264-9381/24/13/005 | null | gr-qc | null | We study `purely radiative' (div E = div H = 0) and geodesic perfect fluids
with non-constant pressure and show that the Bianchi class A perfect fluids can
be uniquely characterized --modulo the class of purely electric and
(pseudo-)spherically symmetric universes-- as those models for which the
magnetic and electric... | [
{
"created": "Sun, 4 Mar 2007 16:30:48 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Mar 2007 10:12:45 GMT",
"version": "v2"
},
{
"created": "Tue, 8 May 2007 07:15:28 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Bastiaensen",
"B.",
""
],
[
"Karimian",
"H. R.",
""
],
[
"Bergh",
"N. Van den",
""
],
[
"Wylleman",
"L.",
""
]
] | We study `purely radiative' (div E = div H = 0) and geodesic perfect fluids with non-constant pressure and show that the Bianchi class A perfect fluids can be uniquely characterized --modulo the class of purely electric and (pseudo-)spherically symmetric universes-- as those models for which the magnetic and electric p... |
1311.4273 | Ayaka Shoda | Ayaka Shoda, Masaki Ando, Koji Ishidoshiro, Kenshi Okada, Wataru
Kokuyama, Yoichi Aso, Kimio Tsubono | Search for a Stochastic Gravitational-wave Background using a pair of
Torsion-bar Antennas | 5 pages, 4 figures | Phys. Rev. D 89, 027101 (2014) | 10.1103/PhysRevD.89.027101 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have set a new upper limit on the stochastic gravitational wave background
(SGWB) using two prototype Torsion-bar Antennas (TOBAs). TOBA is a
low-frequency gravitational-wave detector with bar-shaped test masses rotated
by the tidal force of gravitational waves. As a result of simultaneous 7-hour
observations with... | [
{
"created": "Mon, 18 Nov 2013 05:57:46 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2014 02:41:36 GMT",
"version": "v2"
}
] | 2014-01-28 | [
[
"Shoda",
"Ayaka",
""
],
[
"Ando",
"Masaki",
""
],
[
"Ishidoshiro",
"Koji",
""
],
[
"Okada",
"Kenshi",
""
],
[
"Kokuyama",
"Wataru",
""
],
[
"Aso",
"Yoichi",
""
],
[
"Tsubono",
"Kimio",
""
]
] | We have set a new upper limit on the stochastic gravitational wave background (SGWB) using two prototype Torsion-bar Antennas (TOBAs). TOBA is a low-frequency gravitational-wave detector with bar-shaped test masses rotated by the tidal force of gravitational waves. As a result of simultaneous 7-hour observations with T... |
1707.02764 | Igor Nikitin | Igor Nikitin | Wormhole solutions of RDM model | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model of a spiral galaxy with radially directed flows of dark matter is
extended by exotic matter, in a form of a perfect fluid with a linear
anisotropic equation of state. The exotic matter is collected in the minimum of
gravitational potential and opens a wormhole in the center of the galaxy. The
flows of dark ... | [
{
"created": "Mon, 10 Jul 2017 09:19:16 GMT",
"version": "v1"
}
] | 2017-07-11 | [
[
"Nikitin",
"Igor",
""
]
] | The model of a spiral galaxy with radially directed flows of dark matter is extended by exotic matter, in a form of a perfect fluid with a linear anisotropic equation of state. The exotic matter is collected in the minimum of gravitational potential and opens a wormhole in the center of the galaxy. The flows of dark ma... |
gr-qc/0305018 | Allan Joseph Medved | Gilad Gour and A.J.M. Medved | Thermal Fluctuations and Black Hole Entropy | 25 pages, Revtex; references added and corrected, and some minor
changes | Class.Quant.Grav. 20 (2003) 3307-3326 | 10.1088/0264-9381/20/15/303 | null | gr-qc hep-th | null | In this paper, we consider the effect of thermal fluctuations on the entropy
of both neutral and charged black holes. We emphasize the distinction between
fixed and fluctuating charge systems; using a canonical ensemble to describe
the former and a grand canonical ensemble to study the latter. Our novel
approach is b... | [
{
"created": "Mon, 5 May 2003 19:56:10 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jun 2003 23:22:10 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Gour",
"Gilad",
""
],
[
"Medved",
"A. J. M.",
""
]
] | In this paper, we consider the effect of thermal fluctuations on the entropy of both neutral and charged black holes. We emphasize the distinction between fixed and fluctuating charge systems; using a canonical ensemble to describe the former and a grand canonical ensemble to study the latter. Our novel approach is bas... |
1910.09363 | Jeff Steinhauer | Victor I. Kolobov, Katrine Golubkov, Juan Ram\'on Mu\~noz de Nova, and
Jeff Steinhauer | Spontaneous Hawking radiation and beyond: Observing the time evolution
of an analogue black hole | null | Nature Phys. 17, 362-367 (2021) | 10.1038/s41567-020-01076-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We observe the time dependence of the Hawking radiation in an analogue black
hole. Soon after the formation of the horizon, there is little or no Hawking
radiation. The Hawking radiation then ramps up during approximately one period
of oscillation, until it reaches the quantity expected for spontaneous
emission. This... | [
{
"created": "Mon, 21 Oct 2019 13:34:29 GMT",
"version": "v1"
}
] | 2021-11-02 | [
[
"Kolobov",
"Victor I.",
""
],
[
"Golubkov",
"Katrine",
""
],
[
"de Nova",
"Juan Ramón Muñoz",
""
],
[
"Steinhauer",
"Jeff",
""
]
] | We observe the time dependence of the Hawking radiation in an analogue black hole. Soon after the formation of the horizon, there is little or no Hawking radiation. The Hawking radiation then ramps up during approximately one period of oscillation, until it reaches the quantity expected for spontaneous emission. This i... |
gr-qc/0005056 | Lawrence E. Kidder | Lawrence E. Kidder, Mark A. Scheel, Saul A. Teukolsky, Eric D. Carlson
and Gregory B. Cook | Black hole evolution by spectral methods | 20 pages, 17 figures, submitted to PRD | Phys.Rev. D62 (2000) 084032 | 10.1103/PhysRevD.62.084032 | null | gr-qc | null | Current methods of evolving a spacetime containing one or more black holes
are plagued by instabilities that prohibit long-term evolution. Some of these
instabilities may be due to the numerical method used, traditionally finite
differencing. In this paper, we explore the use of a pseudospectral collocation
(PSC) met... | [
{
"created": "Mon, 15 May 2000 18:52:53 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kidder",
"Lawrence E.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
],
[
"Carlson",
"Eric D.",
""
],
[
"Cook",
"Gregory B.",
""
]
] | Current methods of evolving a spacetime containing one or more black holes are plagued by instabilities that prohibit long-term evolution. Some of these instabilities may be due to the numerical method used, traditionally finite differencing. In this paper, we explore the use of a pseudospectral collocation (PSC) metho... |
gr-qc/0207012 | D. F. Mota | John D. Barrow and David F. Mota | Qualitative Analysis of Universes with Varying Alpha | 26 pages, 6 figures | Class.Quant.Grav. 19 (2002) 6197-6212 | 10.1088/0264-9381/19/23/317 | DAMTP-2002-80 | gr-qc astro-ph hep-ph | null | Assuming a Friedmann universe which evolves with a power-law scale factor,
$a=t^{n}$, we analyse the phase space of the system of equations that describes
a time-varying fine structure 'constant', $\alpha$, in the
Bekenstein-Sandvik-Barrow-Magueijo generalisation of general relativity. We
have classified all the poss... | [
{
"created": "Tue, 2 Jul 2002 12:28:18 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Barrow",
"John D.",
""
],
[
"Mota",
"David F.",
""
]
] | Assuming a Friedmann universe which evolves with a power-law scale factor, $a=t^{n}$, we analyse the phase space of the system of equations that describes a time-varying fine structure 'constant', $\alpha$, in the Bekenstein-Sandvik-Barrow-Magueijo generalisation of general relativity. We have classified all the possib... |
1604.07428 | Wolfgang Wieland | Wolfgang Wieland | Quasi-local gravitational angular momentum and centre of mass from
generalised Witten equations | 26 pages, one figure | Gen. Rel. Grav. 49 (2017) | 10.1007/s10714-017-2200-4 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Witten's proof for the positivity of the ADM mass gives a definition of
energy in terms of three-surface spinors. In this paper, we give a
generalisation for the remaining six Poincar\'e charges at spacelike infinity,
which are the angular momentum and centre of mass. The construction improves on
certain three-surfac... | [
{
"created": "Mon, 25 Apr 2016 20:14:27 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2017 23:04:26 GMT",
"version": "v2"
}
] | 2017-02-14 | [
[
"Wieland",
"Wolfgang",
""
]
] | Witten's proof for the positivity of the ADM mass gives a definition of energy in terms of three-surface spinors. In this paper, we give a generalisation for the remaining six Poincar\'e charges at spacelike infinity, which are the angular momentum and centre of mass. The construction improves on certain three-surface ... |
1005.4201 | Puxun Wu | Kaituo Zhang, Puxun Wu, Hongwei Yu | The stability of Einstein static universe in the DGP braneworld | 10 pages, 2 figures, to appear in PLB | Phys.Lett.B690:229-232,2010 | 10.1016/j.physletb.2010.05.040 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/3.0/ | The stability of an Einstein static universe in the DGP braneworld scenario
is studied in this paper. Two separate branches denoted by $\epsilon=\pm1$ of
the DGP model are analyzed. Assuming the existence of a perfect fluid with a
constant equation of state, $w$, in the universe, we find that, for the branch
with $\e... | [
{
"created": "Sun, 23 May 2010 13:37:25 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2010 11:21:17 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Jun 2010 23:37:27 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Zhang",
"Kaituo",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | The stability of an Einstein static universe in the DGP braneworld scenario is studied in this paper. Two separate branches denoted by $\epsilon=\pm1$ of the DGP model are analyzed. Assuming the existence of a perfect fluid with a constant equation of state, $w$, in the universe, we find that, for the branch with $\eps... |
2104.02011 | Konstantin Eder | Konstantin Eder, Hanno Sahlmann | Holst-MacDowell-Mansouri action for (extended) supergravity with
boundaries and super Chern-Simons theory | v2: published version, 40 pages | J. High Energ. Phys. 2021, 71 (2021) | 10.1007/JHEP07(2021)071 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, the Cartan geometric approach toward (extended) supergravity
in the presence of boundaries will be discussed. In particular, based on new
developments in this field, we will derive the Holst variant of the
MacDowell-Mansouri action for $\mathcal{N}=1$ and $\mathcal{N}=2$ pure AdS
supergravity in $D=4... | [
{
"created": "Mon, 5 Apr 2021 17:00:04 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jul 2021 07:55:39 GMT",
"version": "v2"
}
] | 2021-07-15 | [
[
"Eder",
"Konstantin",
""
],
[
"Sahlmann",
"Hanno",
""
]
] | In this article, the Cartan geometric approach toward (extended) supergravity in the presence of boundaries will be discussed. In particular, based on new developments in this field, we will derive the Holst variant of the MacDowell-Mansouri action for $\mathcal{N}=1$ and $\mathcal{N}=2$ pure AdS supergravity in $D=4$ ... |
gr-qc/9804075 | Sanjay Jhingan | P. S. Joshi and I. H. Dwivedi | Initial data and the end state of spherically symmetric gravitational
collapse | Ordinary Tex file, 31 pages no figures | Class.Quant.Grav. 16 (1999) 41-59 | 10.1088/0264-9381/16/1/003 | null | gr-qc | null | Generalizing earlier results on the initial data and the final fate of dust
collapse, we study here the relevance of the initial state of a spherically
symmetric matter cloud towards determining its end state in the course of a
continuing gravitational collapse. It is shown that given an arbitrary regular
distributio... | [
{
"created": "Tue, 28 Apr 1998 06:28:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Joshi",
"P. S.",
""
],
[
"Dwivedi",
"I. H.",
""
]
] | Generalizing earlier results on the initial data and the final fate of dust collapse, we study here the relevance of the initial state of a spherically symmetric matter cloud towards determining its end state in the course of a continuing gravitational collapse. It is shown that given an arbitrary regular distribution ... |
0910.1631 | Hans Westman F | Hans F. Westman | A First-Principles Implementation of Scale Invariance Using Best
Matching | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a first-principles implementation of spatial scale invariance as a
local gauge symmetry in geometry dynamics using the method of best matching .
In addition to the 3-metric, the proposed scale invariant theory also contains
a 3-vector potential $A_k$ as a dynamical variable. Although some of the
mathematic... | [
{
"created": "Thu, 8 Oct 2009 23:36:59 GMT",
"version": "v1"
}
] | 2009-10-12 | [
[
"Westman",
"Hans F.",
""
]
] | We present a first-principles implementation of spatial scale invariance as a local gauge symmetry in geometry dynamics using the method of best matching . In addition to the 3-metric, the proposed scale invariant theory also contains a 3-vector potential $A_k$ as a dynamical variable. Although some of the mathematics ... |
gr-qc/0412041 | Zhong Chao Wu | Zhong Chao Wu | Creation of Kerr-de Sitter Black Hole in All Dimensions | 7 pages | Phys.Lett. B613 (2005) 1-4 | null | null | gr-qc astro-ph hep-th | null | We discuss the quantum creation scenario of a Kerr-de Sitter black hole in
all dimensions. We show that its relative creation probability is the
exponential to the entropy of the black hole, using a topological argument. The
action of the regular Euclidean instanton can be calculated in the same way.
| [
{
"created": "Thu, 9 Dec 2004 13:44:05 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Apr 2005 20:12:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Wu",
"Zhong Chao",
""
]
] | We discuss the quantum creation scenario of a Kerr-de Sitter black hole in all dimensions. We show that its relative creation probability is the exponential to the entropy of the black hole, using a topological argument. The action of the regular Euclidean instanton can be calculated in the same way. |
gr-qc/9801089 | Jacek Gruszczak | Jacek Gruszczak | Gravitational Conical Bremsstrahlung and Differential Structures | 3 pages, LaTeX, mprocl.sty, to appear in the Proceedings of the 8th
Marcel Grossman Meeting, Jerusalem, June 1997 (World Scientific, Singapore) | null | null | null | gr-qc | null | Differential properties of a spin 2 boson field $\psi_{\mu\nu}$ describing
propagation of gravitational perturbations on a straight cosmic string's
space-time background are studied by means of methods of the differential
spaces theory. It is shown that this field is a smooth one in the interior of
cosmic string's sp... | [
{
"created": "Tue, 27 Jan 1998 11:21:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gruszczak",
"Jacek",
""
]
] | Differential properties of a spin 2 boson field $\psi_{\mu\nu}$ describing propagation of gravitational perturbations on a straight cosmic string's space-time background are studied by means of methods of the differential spaces theory. It is shown that this field is a smooth one in the interior of cosmic string's spac... |
gr-qc/0011059 | null | O. Gron, S. Hervik | Gravitational Entropy and Quantum Cosmology | 20 pages, 7 ps figures | Class.Quant.Grav. 18 (2001) 601-618 | 10.1088/0264-9381/18/4/303 | null | gr-qc | null | We investigate the evolution of different measures of ``Gravitational
Entropy'' in Bianchi type I and Lema\^itre-Tolman universe models.
A new quantity behaving in accordance with the second law of thermodynamics
is introduced. We then go on and investigate whether a quantum calculation of
initial conditions for th... | [
{
"created": "Fri, 17 Nov 2000 07:33:03 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Feb 2001 08:40:46 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Gron",
"O.",
""
],
[
"Hervik",
"S.",
""
]
] | We investigate the evolution of different measures of ``Gravitational Entropy'' in Bianchi type I and Lema\^itre-Tolman universe models. A new quantity behaving in accordance with the second law of thermodynamics is introduced. We then go on and investigate whether a quantum calculation of initial conditions for the un... |
gr-qc/9406007 | Neil Cornish | N. J. Cornish and J. W. Moffat | Non-Singular Gravity Without Black Holes | 26 pages, UTPT-94-08 | J.Math.Phys.35:6628-6643,1994 | 10.1063/1.530697 | null | gr-qc | null | A non-singular, static spherically symmetric solution to the nonsymmetric
gravitational and electromagnetic theory field equations is derived, which
depends on the four parameters m, l^2, Q and s, where m is the mass, Q is the
electric charge, l^2 is the NGT charge of a body and s is a dimensionless
constant. The ele... | [
{
"created": "Fri, 3 Jun 1994 23:28:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cornish",
"N. J.",
""
],
[
"Moffat",
"J. W.",
""
]
] | A non-singular, static spherically symmetric solution to the nonsymmetric gravitational and electromagnetic theory field equations is derived, which depends on the four parameters m, l^2, Q and s, where m is the mass, Q is the electric charge, l^2 is the NGT charge of a body and s is a dimensionless constant. The elect... |
1907.04982 | Masaki Yamada | Jeong-Pyong Hong, Motoo Suzuki, Masaki Yamada | Charged black holes in non-linear Q-clouds with O(3) symmetry | 6 pages, 5 figures; v2: minor revision, added a comment on no-hair
theorem by Mayo and Bekenstein | null | 10.1016/j.physletb.2020.135324 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct charged soliton solutions around spherical charged black holes
with no angular momentum in asymptotically flat spacetime. These solutions are
non-linear generalizations of charged scalar clouds, dubbed Q-ball hair or
Q-clouds, and they do not contradict the non-existence theorem for free
(linear) scalar ... | [
{
"created": "Thu, 11 Jul 2019 03:23:17 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Feb 2020 02:51:35 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Hong",
"Jeong-Pyong",
""
],
[
"Suzuki",
"Motoo",
""
],
[
"Yamada",
"Masaki",
""
]
] | We construct charged soliton solutions around spherical charged black holes with no angular momentum in asymptotically flat spacetime. These solutions are non-linear generalizations of charged scalar clouds, dubbed Q-ball hair or Q-clouds, and they do not contradict the non-existence theorem for free (linear) scalar cl... |
1907.04747 | Quentin Baghi | Quentin Baghi, Ira Thorpe, Jacob Slutsky, John Baker, Tito Dal Canton,
Natalia Korsakova, Nikos Karnesis | Gravitational-wave parameter estimation with gaps in LISA: a Bayesian
data augmentation method | 18 pages, 7 figures, accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.100.022003 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By listening to gravity in the low frequency band, between 0.1 mHz and 1 Hz,
the future space-based gravitational-wave observatory LISA will be able to
detect tens of thousands of astrophysical sources from cosmic dawn to the
present. The detection and characterization of all resolvable sources is a
challenge in itse... | [
{
"created": "Wed, 10 Jul 2019 14:23:27 GMT",
"version": "v1"
}
] | 2019-07-24 | [
[
"Baghi",
"Quentin",
""
],
[
"Thorpe",
"Ira",
""
],
[
"Slutsky",
"Jacob",
""
],
[
"Baker",
"John",
""
],
[
"Canton",
"Tito Dal",
""
],
[
"Korsakova",
"Natalia",
""
],
[
"Karnesis",
"Nikos",
""
]
] | By listening to gravity in the low frequency band, between 0.1 mHz and 1 Hz, the future space-based gravitational-wave observatory LISA will be able to detect tens of thousands of astrophysical sources from cosmic dawn to the present. The detection and characterization of all resolvable sources is a challenge in itself... |
gr-qc/0410045 | Xian-Hui Ge | Xian-Hui Ge and You-Gen Shen | Entropy in the NUT-Kerr-Newman Black Holes Due to an Arbitrary Spin
Field | null | Class.Quant.Grav.20:3593-3602,2003 | 10.1088/0264-9381/20/16/305 | null | gr-qc | null | Membrane method is used to compute the entropy of the NUT-Kerr-Newman black
holes. It is found that even though the Euler characteristic is greater than
two, the Bekenstein-Hawking area law is still satisfied. The formula $S=\chi
A/8$ relating the entropy and the Euler characteristic becomes inapplicable for
non-extr... | [
{
"created": "Sat, 9 Oct 2004 07:13:20 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Ge",
"Xian-Hui",
""
],
[
"Shen",
"You-Gen",
""
]
] | Membrane method is used to compute the entropy of the NUT-Kerr-Newman black holes. It is found that even though the Euler characteristic is greater than two, the Bekenstein-Hawking area law is still satisfied. The formula $S=\chi A/8$ relating the entropy and the Euler characteristic becomes inapplicable for non-extrem... |
2104.07523 | Jianping Hu | Jian-Ping Hu, Li-Li Shi, Yu Zhang, Peng-Fei Duan | Analytical time-like geodesics in modified Hayward black hole space-time | 13 pages, 8 figures | ASTROPHYS SPACE SCI, 2018, 363, 199 | 10.1007/s10509-018-3423-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of modified Hayward black hole space-time can be investigated
through analyzing the particle geodesics. By means of a detailed analysis of
the corresponding effective potentials for a massive particle, we find all
possible orbits which are allowed by the energy levels. The trajectories of
orbits are pl... | [
{
"created": "Thu, 15 Apr 2021 15:21:17 GMT",
"version": "v1"
}
] | 2021-04-16 | [
[
"Hu",
"Jian-Ping",
""
],
[
"Shi",
"Li-Li",
""
],
[
"Zhang",
"Yu",
""
],
[
"Duan",
"Peng-Fei",
""
]
] | The properties of modified Hayward black hole space-time can be investigated through analyzing the particle geodesics. By means of a detailed analysis of the corresponding effective potentials for a massive particle, we find all possible orbits which are allowed by the energy levels. The trajectories of orbits are plot... |
2012.12742 | Tanmoy Paul | Kazuharu Bamba, E. Elizalde, S. D. Odintsov, Tanmoy Paul | Inflationary magnetogenesis with reheating phase from higher curvature
coupling | JCAP accepted..(Two sections added in the revised version -
"Curvature perturbation induced from EM field" and "Constraints from
Schwinger backreaction") | null | 10.1088/1475-7516/2021/04/009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the generation of magnetic fields from inflation, which occurs
via breakdown of the conformal invariance of the electromagnetic (EM) field,
when coupled with the Ricci scalar and the Gauss-Bonnet invariant. For the case
of instantaneous reheating, the resulting strength of the magnetic field at
present... | [
{
"created": "Wed, 23 Dec 2020 15:24:26 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Feb 2021 16:09:55 GMT",
"version": "v2"
}
] | 2021-04-14 | [
[
"Bamba",
"Kazuharu",
""
],
[
"Elizalde",
"E.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | We investigate the generation of magnetic fields from inflation, which occurs via breakdown of the conformal invariance of the electromagnetic (EM) field, when coupled with the Ricci scalar and the Gauss-Bonnet invariant. For the case of instantaneous reheating, the resulting strength of the magnetic field at present i... |
1412.5160 | Alfredo Iorio | Alfredo Iorio | Graphene and Black Holes: novel materials to reach the unreachable | 3 pages; invited to talk to the workshop "New Frontiers in Multiscale
Modelling of Advanced Materials", ECT*, Trento, June 17-20, 2014; to appear
in Frontiers in Materials | Front. Mater. 1 (2015) 36 | 10.3389/fmats.2014.00036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The case for a dedicated laboratory, to test hep-th models on analogue
systems, is briefly made. The focus is on graphene.
| [
{
"created": "Mon, 15 Dec 2014 11:45:27 GMT",
"version": "v1"
}
] | 2015-02-02 | [
[
"Iorio",
"Alfredo",
""
]
] | The case for a dedicated laboratory, to test hep-th models on analogue systems, is briefly made. The focus is on graphene. |
1511.05700 | Rituparno Goswami | Rituparno Goswami, George F. R. Ellis | 4-dimensional spacetimes from 2-dimensional conformal null data | 7 pages, 2 Figures, Revtex4, Title changed, To appear in Classical
and Quantum Gravity | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate whether the holographic principle proposed in
string theory has a classical counterpart in general relativity theory. We show
that there is a partial correspondence: at least in the case of vacuum Petrov
type D spacetimes that admit a non-trivial Killing tensor, which encompass all
the as... | [
{
"created": "Wed, 18 Nov 2015 09:19:02 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2017 07:21:17 GMT",
"version": "v2"
}
] | 2017-02-03 | [
[
"Goswami",
"Rituparno",
""
],
[
"Ellis",
"George F. R.",
""
]
] | In this paper we investigate whether the holographic principle proposed in string theory has a classical counterpart in general relativity theory. We show that there is a partial correspondence: at least in the case of vacuum Petrov type D spacetimes that admit a non-trivial Killing tensor, which encompass all the astr... |
2303.08548 | Pantelis Apostolopoulos | Pantelis S. Apostolopoulos and Christos Tsipogiannis | Conformal Symmetries of the Strumia and Tetradis Metric | 4 pages, Presented at the 2nd Electronic Conference on Universe, 16
February 2 March 2023, published version | Phys. Sci. Forum 2023, 7, 46 | 10.3390/ECU2023-14100 | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In a recent paper, a new conformally flat metric was introduced, describing
an expanding scalar field in a spherically symmetric geometry. The spacetime
can be interpreted as a Schwarzschild-like model with an apparent horizon
surrounding the curvature singularity. For the above metric, we present the
complete confor... | [
{
"created": "Wed, 15 Mar 2023 12:03:03 GMT",
"version": "v1"
}
] | 2023-03-16 | [
[
"Apostolopoulos",
"Pantelis S.",
""
],
[
"Tsipogiannis",
"Christos",
""
]
] | In a recent paper, a new conformally flat metric was introduced, describing an expanding scalar field in a spherically symmetric geometry. The spacetime can be interpreted as a Schwarzschild-like model with an apparent horizon surrounding the curvature singularity. For the above metric, we present the complete conforma... |
2305.15437 | Abdel Nasser Tawfik | Antonio Pasqua (University of Trieste, Italy), Surajit Chattopadhyay
(Amity University, India), Irina Radinschi (Gheorghe Asach Technical
University, Romania), Azzah Aziz Alshehri (University of Hafr Al Batin, KSA),
Abdel Nasser Tawfik (Future University in Egypt, Cairo) | Reconstruction schemes of scalar field models for the Power Law Entropy
Corrected Holographic Dark Energy model with Ricci scalar cut-off | 57 pages, 0 figure, Submitted to IJMPD. arXiv admin note: text
overlap with arXiv:gr-qc/0609115 by other authors | null | null | ECTP-2023-10 and WLCAPP-2023-10 and FUE-2023-10 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we examine the cosmological characteristics of the Power Law
Entropy Corrected Holographic Dark Energy (PLECHDE) model with infrared (IR)
cut-off, which is determined by the curvature parameter $k$, the time
derivative of $H$, and the average radius of the Ricci scalar curvature $R$,
which varies with t... | [
{
"created": "Tue, 23 May 2023 15:08:55 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jan 2024 17:13:55 GMT",
"version": "v2"
}
] | 2024-01-02 | [
[
"Pasqua",
"Antonio",
"",
"University of Trieste, Italy"
],
[
"Chattopadhyay",
"Surajit",
"",
"Amity University, India"
],
[
"Radinschi",
"Irina",
"",
"Gheorghe Asach Technical\n University, Romania"
],
[
"Alshehri",
"Azzah Aziz",
"",
"Un... | In this work, we examine the cosmological characteristics of the Power Law Entropy Corrected Holographic Dark Energy (PLECHDE) model with infrared (IR) cut-off, which is determined by the curvature parameter $k$, the time derivative of $H$, and the average radius of the Ricci scalar curvature $R$, which varies with the... |
gr-qc/0009037 | Ghanashyam Date | G. Date | Notes on Isolated Horizons | 45 pages, Latex, no figures. Explained approach better. To appear in
Class. Quant. Grav | Class.Quant.Grav.17:5025-5046,2000 | 10.1088/0264-9381/17/24/307 | IMSc/2000/09/52 | gr-qc hep-th | null | A general analysis for characterizing and classifying `isolated horizons' is
presented in terms of null tetrads and spin coefficients. The freely
specifiable spin coefficients corresponding to isolated horizons are identified
and specific symmetry classes are enumerated. For isolated horizons admitting
at least one s... | [
{
"created": "Tue, 12 Sep 2000 05:26:03 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2000 04:13:09 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Nov 2000 11:31:47 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Date",
"G.",
""
]
] | A general analysis for characterizing and classifying `isolated horizons' is presented in terms of null tetrads and spin coefficients. The freely specifiable spin coefficients corresponding to isolated horizons are identified and specific symmetry classes are enumerated. For isolated horizons admitting at least one spa... |
gr-qc/0109067 | Margarita Tchitchikina | O.A.Khrustalev, M.V.Tchitchikina (Moscow State University) | Quantum Gravity on the Classical Background: Group Analysis, Part I | 17 pages | null | null | null | gr-qc | null | Quantization of gravitational field in the neighbourhood of exact solution of
Einstein equation is considered. The method of Bogoliubov group variables is
used.
| [
{
"created": "Wed, 19 Sep 2001 13:30:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Khrustalev",
"O. A.",
"",
"Moscow State University"
],
[
"Tchitchikina",
"M. V.",
"",
"Moscow State University"
]
] | Quantization of gravitational field in the neighbourhood of exact solution of Einstein equation is considered. The method of Bogoliubov group variables is used. |
2406.07105 | Dionysios Kokkinos | Dionysios Kokkinos, Taxiarchis Papakostas | The Study of the Canonical forms of Killing tensor in vacuum with
{\Lambda} | 27 pages, | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | This paper is the initial part of a comprehensive study of spacetimes that
admit the canonical forms of Killing tensor in General Relativity. Our scope is
to derive either new exact solutions of Einstein's equations or to determine
the hidden symmetries of the already known ones. In this preliminary work we
first int... | [
{
"created": "Tue, 11 Jun 2024 09:44:22 GMT",
"version": "v1"
}
] | 2024-06-12 | [
[
"Kokkinos",
"Dionysios",
""
],
[
"Papakostas",
"Taxiarchis",
""
]
] | This paper is the initial part of a comprehensive study of spacetimes that admit the canonical forms of Killing tensor in General Relativity. Our scope is to derive either new exact solutions of Einstein's equations or to determine the hidden symmetries of the already known ones. In this preliminary work we first intro... |
gr-qc/0110005 | Jose Lages | A. Berard, J. Lages and H. Mohrbach | Restoration of Angular Lie Algebra Symmetries from a Covariant
Hamiltonian | null | null | null | null | gr-qc hep-th math-ph math.MP physics.class-ph | null | The sO(3) and the Lorentz algebra symmetries breaking with gauge curvatures
are studied by means of a covariant Hamiltonian. The restoration of these
algebra symmetries in flat and curved spaces is performed and led to the
apparition of a monopole field. Then in the context of the Lorentz algebra we
consider an appli... | [
{
"created": "Mon, 1 Oct 2001 16:42:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berard",
"A.",
""
],
[
"Lages",
"J.",
""
],
[
"Mohrbach",
"H.",
""
]
] | The sO(3) and the Lorentz algebra symmetries breaking with gauge curvatures are studied by means of a covariant Hamiltonian. The restoration of these algebra symmetries in flat and curved spaces is performed and led to the apparition of a monopole field. Then in the context of the Lorentz algebra we consider an applica... |
2211.06435 | Anarya Ray | Anarya Ray and Michael Camilo and Jolien Creighton and Shaon Ghosh and
Soichiro Morisaki | Rapid Hierarchical Inference of Neutron Star Equation of State from
multiple Gravitational Wave Observations of Binary Neutron Star Coalescences | null | Phys.Rev. D 107, 043035 (2023) | 10.1103/PhysRevD.107.043035 | LIGO-P2200301 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Bayesian hierarchical inference of phenomenological parameterized neutron
star equations of state (EoS) from multiple gravitational wave observations of
binary neutron star mergers is of fundamental importance in improving our
understanding of neutron star structure, the general properties of matter at
supra nuclear ... | [
{
"created": "Fri, 11 Nov 2022 19:00:04 GMT",
"version": "v1"
}
] | 2023-03-08 | [
[
"Ray",
"Anarya",
""
],
[
"Camilo",
"Michael",
""
],
[
"Creighton",
"Jolien",
""
],
[
"Ghosh",
"Shaon",
""
],
[
"Morisaki",
"Soichiro",
""
]
] | Bayesian hierarchical inference of phenomenological parameterized neutron star equations of state (EoS) from multiple gravitational wave observations of binary neutron star mergers is of fundamental importance in improving our understanding of neutron star structure, the general properties of matter at supra nuclear de... |
1805.01705 | Titus K Mathew | Krishna P B and Titus K Mathew | Entropy Maximization in the Emergent Gravity Paradigm | 22 pages | Phys. Rev. D 99, 023535 (2019) | 10.1103/PhysRevD.99.023535 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The accelerated expansion of the universe can be interpreted as a quest for
satisfying holographic equipartition. It can be expressed by a simple law,
$\Delta V = \Delta t\left(N_{surf}- N_{bulk}\right)$ which leads to the
standard Friedmann equation. This novel idea suggested by Padmanabhan in the
context of general... | [
{
"created": "Fri, 4 May 2018 10:40:44 GMT",
"version": "v1"
},
{
"created": "Mon, 21 May 2018 16:56:22 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Feb 2019 12:37:33 GMT",
"version": "v3"
}
] | 2019-02-06 | [
[
"B",
"Krishna P",
""
],
[
"Mathew",
"Titus K",
""
]
] | The accelerated expansion of the universe can be interpreted as a quest for satisfying holographic equipartition. It can be expressed by a simple law, $\Delta V = \Delta t\left(N_{surf}- N_{bulk}\right)$ which leads to the standard Friedmann equation. This novel idea suggested by Padmanabhan in the context of general r... |
1202.5039 | Sergei Alexandrov | Sergei Alexandrov | Degenerate Plebanski Sector and Spin Foam Quantization | 34 pages; changes in the abstract and introduction, a few references
added | Class.Quant.Grav. 29 (2012) 145018 | 10.1088/0264-9381/29/14/145018 | L2C:12-013 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the degenerate sector of Spin(4) Plebanski formulation of
four-dimensional gravity is exactly solvable and describes covariantly embedded
SU(2) BF theory. This fact ensures that its spin foam quantization is given by
the SU(2) Crane-Yetter model and allows to test various approaches of imposing
the simpl... | [
{
"created": "Wed, 22 Feb 2012 21:02:07 GMT",
"version": "v1"
},
{
"created": "Fri, 18 May 2012 00:27:18 GMT",
"version": "v2"
}
] | 2012-10-12 | [
[
"Alexandrov",
"Sergei",
""
]
] | We show that the degenerate sector of Spin(4) Plebanski formulation of four-dimensional gravity is exactly solvable and describes covariantly embedded SU(2) BF theory. This fact ensures that its spin foam quantization is given by the SU(2) Crane-Yetter model and allows to test various approaches of imposing the simplic... |
gr-qc/9902045 | Domenico Giulini | Domenico Giulini and Donald Marolf | A Uniqueness Theorem for Constraint Quantization | 23 pages, RevTeX, further comments and references added (May 26. '99) | Class.Quant.Grav. 16 (1999) 2489-2505 | 10.1088/0264-9381/16/7/322 | ZU-TH-99/2 and SU-GP-99/1-1 | gr-qc hep-th quant-ph | null | This work addresses certain ambiguities in the Dirac approach to constrained
systems. Specifically, we investigate the space of so-called ``rigging maps''
associated with Refined Algebraic Quantization, a particular realization of the
Dirac scheme. Our main result is to provide a condition under which the rigging
map... | [
{
"created": "Mon, 15 Feb 1999 13:26:58 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 1999 16:30:13 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Giulini",
"Domenico",
""
],
[
"Marolf",
"Donald",
""
]
] | This work addresses certain ambiguities in the Dirac approach to constrained systems. Specifically, we investigate the space of so-called ``rigging maps'' associated with Refined Algebraic Quantization, a particular realization of the Dirac scheme. Our main result is to provide a condition under which the rigging map i... |
2103.10960 | Taishi Ikeda | Taishi Ikeda, Massimo Bianchi, Dario Consoli, Alfredo Grillo, Jos\`e
Francisco Morales, Paolo Pani, Guilherme Raposo | Black-hole microstate spectroscopy: ringdown, quasinormal modes, and
echoes | Published version, 22 pages, 10 figures, Movies are available in
https://web.uniroma1.it/gmunu/fuzzballs-multipole-moments-and-ringdown | Phys. Rev. D 104, 066021 (2021) | 10.1103/PhysRevD.104.066021 | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Deep conceptual problems associated with classical black holes can be
addressed in string theory by the ``fuzzball'' paradigm, which provides a
microscopic description of a black hole in terms of a thermodynamically large
number of regular, horizonless, geometries with much less symmetry than the
corresponding black ... | [
{
"created": "Fri, 19 Mar 2021 18:00:04 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2021 08:10:34 GMT",
"version": "v2"
}
] | 2021-09-29 | [
[
"Ikeda",
"Taishi",
""
],
[
"Bianchi",
"Massimo",
""
],
[
"Consoli",
"Dario",
""
],
[
"Grillo",
"Alfredo",
""
],
[
"Morales",
"Josè Francisco",
""
],
[
"Pani",
"Paolo",
""
],
[
"Raposo",
"Guilherme",
""
]
... | Deep conceptual problems associated with classical black holes can be addressed in string theory by the ``fuzzball'' paradigm, which provides a microscopic description of a black hole in terms of a thermodynamically large number of regular, horizonless, geometries with much less symmetry than the corresponding black ho... |
1511.02291 | William Huanshan Chuang | William Chuang | An Invariant Between Hyperbolic Surfaces and Lattice Spin Models | null | null | null | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this succinct note, it is showed that a partition function of equivalent
classes of hyperbolic surfaces can be connected to an Ising model located on
the boundary of the Poincare disc, as hinted by Poincare's Uniformization
theorem and Patterson-Sullivan's Theorem.
Keywords: Hyperbolic spaces, Schottky groups, I... | [
{
"created": "Sat, 7 Nov 2015 03:18:35 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Apr 2016 05:43:23 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Jul 2018 23:01:59 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Jan 2019 07:53:12 GMT",
"version": "v4"
},
{
"cr... | 2023-08-29 | [
[
"Chuang",
"William",
""
]
] | In this succinct note, it is showed that a partition function of equivalent classes of hyperbolic surfaces can be connected to an Ising model located on the boundary of the Poincare disc, as hinted by Poincare's Uniformization theorem and Patterson-Sullivan's Theorem. Keywords: Hyperbolic spaces, Schottky groups, Ising... |
2305.10739 | Sangmin Lee | Hojin Lee, Sangmin Lee | Poincar\'e invariance of spinning binary dynamics in the
post-Minkowskian Hamiltonian approach | 33 pages; v2. references added, minor corrections | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We initiate the construction of the global Poincar\'e algebra generators in
the context of the post-Minkowskian Hamiltonian formulation of gravitating
binary dynamics in isotropic coordinates that is partly inspired by scattering
amplitudes. At the first post-Minkowskian (1PM) order, we write down the
Hamiltonian in ... | [
{
"created": "Thu, 18 May 2023 06:17:51 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Jun 2023 06:30:36 GMT",
"version": "v2"
}
] | 2023-06-06 | [
[
"Lee",
"Hojin",
""
],
[
"Lee",
"Sangmin",
""
]
] | We initiate the construction of the global Poincar\'e algebra generators in the context of the post-Minkowskian Hamiltonian formulation of gravitating binary dynamics in isotropic coordinates that is partly inspired by scattering amplitudes. At the first post-Minkowskian (1PM) order, we write down the Hamiltonian in a ... |
1406.5559 | David Garfinkle | David Garfinkle and Istvan Racz | Resolving a gravitational wave memory paradox | null | null | 10.1007/s10714-015-1924-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two different approaches to gravitational perturbation theory appear to give
two different answers for the properties of gravitational wave memory. We show
that this contradiction is only apparent and the two approaches actually agree.
| [
{
"created": "Fri, 20 Jun 2014 23:47:49 GMT",
"version": "v1"
}
] | 2015-07-15 | [
[
"Garfinkle",
"David",
""
],
[
"Racz",
"Istvan",
""
]
] | Two different approaches to gravitational perturbation theory appear to give two different answers for the properties of gravitational wave memory. We show that this contradiction is only apparent and the two approaches actually agree. |
1510.00814 | Xun Xue | Yiwei Wu, Xun Xue, Lixiang Yang, Tzu-Chiang Yuan | The Effective Gravitational Theory at Large Scale with Lorentz Violation | 5 pages | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dipole anomaly in the power spectrum of CMB may indicate that the Lorentz
boost invarianc is violated at cosmic scale. We assume that the Lorentz
symmetry is violated partly from the scale of galaxy. We employ the symmetry of
very special relativity as an example to illustrate the Lorentz violation
effect by cons... | [
{
"created": "Sat, 3 Oct 2015 13:04:22 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Oct 2015 13:09:01 GMT",
"version": "v2"
},
{
"created": "Sun, 18 Oct 2015 00:03:27 GMT",
"version": "v3"
}
] | 2015-10-20 | [
[
"Wu",
"Yiwei",
""
],
[
"Xue",
"Xun",
""
],
[
"Yang",
"Lixiang",
""
],
[
"Yuan",
"Tzu-Chiang",
""
]
] | The dipole anomaly in the power spectrum of CMB may indicate that the Lorentz boost invarianc is violated at cosmic scale. We assume that the Lorentz symmetry is violated partly from the scale of galaxy. We employ the symmetry of very special relativity as an example to illustrate the Lorentz violation effect by constr... |
1207.6028 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Spherically symmetric gravity coupled to a scalar field with a local
Hamiltonian: the complete initial-boundary value problem using metric
variables | 6 pages, 1 figure | null | 10.1088/0264-9381/30/2/025012 | LSU-REL-072412 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a gauge fixing of gravity coupled to a scalar field in spherical
symmetry such that the Hamiltonian is an integral over space of a local
density. In a previous paper we had presented it using Ashtekar's new
variables. Here we study it in metric variables. We specify completely the
initial-boundary value pr... | [
{
"created": "Wed, 25 Jul 2012 15:32:18 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We discuss a gauge fixing of gravity coupled to a scalar field in spherical symmetry such that the Hamiltonian is an integral over space of a local density. In a previous paper we had presented it using Ashtekar's new variables. Here we study it in metric variables. We specify completely the initial-boundary value prob... |
gr-qc/0511044 | Yasunari Kurita | Yasunari Kurita, Ken-ichi Nakao | Naked singularity resolution in cylindrical collapse | 17 pages, no figure | Phys.Rev. D73 (2006) 064022 | 10.1103/PhysRevD.73.064022 | OCU-PHYS-236, AP-GR-28, YITP-06-03 | gr-qc | null | In this paper, we study the gravitational collapse of null dust in the
cylindrically symmetric spacetime. The naked singularity necessarily forms at
the symmetry axis. We consider the situation in which null dust is emitted
again from the naked singularity formed by the collapsed null dust and
investigate the back-re... | [
{
"created": "Wed, 9 Nov 2005 06:25:25 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2006 09:40:34 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Kurita",
"Yasunari",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | In this paper, we study the gravitational collapse of null dust in the cylindrically symmetric spacetime. The naked singularity necessarily forms at the symmetry axis. We consider the situation in which null dust is emitted again from the naked singularity formed by the collapsed null dust and investigate the back-reac... |
2407.06238 | Mohamed Ibrahim Nouh | Mohamed S. Aboueisha, A. S. Saad, Mohamed I. Nouh, Tarek M. Kamel, M.
M. Beheary and Kamel A. K. Gadallah | Stability Analysis Of Fractional Relativistic Polytropes | null | Physica Scripta, 99, 075052, 2024 | 10.1088/1402-4896/ad59df | null | gr-qc astro-ph.HE astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | In astrophysics, the gravitational stability of a self-gravitating polytropic
fluid sphere is an intriguing subject, especially when trying to comprehend the
genesis and development of celestial bodies like planets and stars. This
stability is the sphere's capacity to stay in balance in the face of
disruptions. We ut... | [
{
"created": "Sun, 7 Jul 2024 20:07:50 GMT",
"version": "v1"
}
] | 2024-07-10 | [
[
"Aboueisha",
"Mohamed S.",
""
],
[
"Saad",
"A. S.",
""
],
[
"Nouh",
"Mohamed I.",
""
],
[
"Kamel",
"Tarek M.",
""
],
[
"Beheary",
"M. M.",
""
],
[
"Gadallah",
"Kamel A. K.",
""
]
] | In astrophysics, the gravitational stability of a self-gravitating polytropic fluid sphere is an intriguing subject, especially when trying to comprehend the genesis and development of celestial bodies like planets and stars. This stability is the sphere's capacity to stay in balance in the face of disruptions. We util... |
2303.08960 | Anish Agashe | Anish Agashe | Kinematics in Metric-Affine Geometry | Matches the published version | Phys. Scr. 98 105210 (2023) | 10.1088/1402-4896/acf5ac | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In a given geometry, the kinematics of a congruence of curves is described by
a set of three quantities called expansion, rotation, and shear. The equations
governing the evolution of these quantities are referred to as kinematic
equations. In this paper, the kinematics of congruence of curves in a
metric-affine geom... | [
{
"created": "Wed, 15 Mar 2023 22:15:39 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Sep 2023 15:21:22 GMT",
"version": "v2"
}
] | 2023-09-12 | [
[
"Agashe",
"Anish",
""
]
] | In a given geometry, the kinematics of a congruence of curves is described by a set of three quantities called expansion, rotation, and shear. The equations governing the evolution of these quantities are referred to as kinematic equations. In this paper, the kinematics of congruence of curves in a metric-affine geomet... |
gr-qc/9901046 | null | T. Damour (IHES) | The theoretical significance of G | 6 pages, Revtex, contribution to the Cavendish bicentennial
conference, to appear in Measurement, Science and Technology, minor changes
in the references | Measur.Sci.Tech.10:467-469,1999 | 10.1088/0957-0233/10/6/309 | IHES/P/99/1 | gr-qc | null | The quantization of gravity, and its unification with the other interactions,
is one of the greatest challenges of theoretical physics. Current ideas suggest
that the value of G might be related to the other fundamental constants of
physics, and that gravity might be richer than the standard Newton-Einstein
descripti... | [
{
"created": "Fri, 15 Jan 1999 17:39:13 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jan 1999 11:31:26 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Damour",
"T.",
"",
"IHES"
]
] | The quantization of gravity, and its unification with the other interactions, is one of the greatest challenges of theoretical physics. Current ideas suggest that the value of G might be related to the other fundamental constants of physics, and that gravity might be richer than the standard Newton-Einstein description... |
1803.05310 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi | Cosmic acceleration in screening hybrid quintessence model | 18 pages, 5 figures, references updated | Phys. Dark Univ. 22 (2018) 101 | 10.1016/j.dark.2018.10.003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A formalism for the appearance of dark energy in the matter dominated era,
leading to a persistent de Sitter expansion at the late time is proposed. Our
framework is a hybrid quintessence model with a non-minimal coupling to the
Ricci scalar. Coupling to the curvature triggers the dark energy evolution,
while the cou... | [
{
"created": "Mon, 12 Mar 2018 13:12:56 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Oct 2018 08:03:06 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Nov 2018 07:01:32 GMT",
"version": "v3"
}
] | 2018-11-29 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | A formalism for the appearance of dark energy in the matter dominated era, leading to a persistent de Sitter expansion at the late time is proposed. Our framework is a hybrid quintessence model with a non-minimal coupling to the Ricci scalar. Coupling to the curvature triggers the dark energy evolution, while the coupl... |
gr-qc/0610083 | Harry I. Ringermacher | Harry I. Ringermacher, Lawrence R. Mead | Are Dark Matter and Dark Energy the Residue of the Expansion-Reaction to
the Big Bang ? | null | null | null | null | gr-qc astro-ph | null | We derive the phenomenological Milgrom square-law acceleration, describing
the apparent behavior of dark matter, as the reaction to the Big Bang from a
model based on the Lorentz-Dirac equation of motion traditionally describing
radiation reaction in electromagnetism but proven applicable to expansion
reaction in cos... | [
{
"created": "Mon, 16 Oct 2006 21:14:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ringermacher",
"Harry I.",
""
],
[
"Mead",
"Lawrence R.",
""
]
] | We derive the phenomenological Milgrom square-law acceleration, describing the apparent behavior of dark matter, as the reaction to the Big Bang from a model based on the Lorentz-Dirac equation of motion traditionally describing radiation reaction in electromagnetism but proven applicable to expansion reaction in cosmo... |
gr-qc/9901011 | Mohammad Nouri-Zonoz | Mohammad Nouri-Zonoz | Gravoelectromagnetic approach to the gravitational Faraday rotation in
stationary spacetimes | 13 pages including one figure. Latex. Section 6 has been removed and
included in the conclusion section. Some typos has been corrected and new
reference has been added | Phys.Rev.D60:024013,1999 | 10.1103/PhysRevD.60.024013 | IUCAA-1/99 | gr-qc | null | Using the 1+3 formulation of stationary spacetimes we show, in the context of
gravoelectromagnetism, that the plane of the polarization of light rays passing
close to a black hole undergoes a rotation. We show that this rotation has the
same integral form as the usual Faraday effect, i.e. it is proportional to the
in... | [
{
"created": "Wed, 6 Jan 1999 05:16:34 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Apr 1999 08:31:49 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Nouri-Zonoz",
"Mohammad",
""
]
] | Using the 1+3 formulation of stationary spacetimes we show, in the context of gravoelectromagnetism, that the plane of the polarization of light rays passing close to a black hole undergoes a rotation. We show that this rotation has the same integral form as the usual Faraday effect, i.e. it is proportional to the inte... |
2011.11948 | Davide Gerosa | Davide Gerosa, Matthew Mould, Daria Gangardt, Patricia Schmidt,
Geraint Pratten, Lucy M. Thomas | A generalized precession parameter $\chi_\mathrm{p}$ to interpret
gravitational-wave data | 12 pages, 6 figures, 1 table. Published in PRD. Software available at
https://github.com/dgerosa/generalizedchip | Phys. Rev. D 103, 064067 (2021) | 10.1103/PhysRevD.103.064067 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Originally designed for waveform approximants, the effective precession
parameter $\chi_\mathrm{p}$ is the most commonly used quantity to characterize
spin-precession effects in gravitational-wave observations of black-hole binary
coalescences. We point out that the current definition of $\chi_\mathrm{p}$
retains som... | [
{
"created": "Tue, 24 Nov 2020 08:04:48 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2021 14:38:54 GMT",
"version": "v2"
}
] | 2021-03-26 | [
[
"Gerosa",
"Davide",
""
],
[
"Mould",
"Matthew",
""
],
[
"Gangardt",
"Daria",
""
],
[
"Schmidt",
"Patricia",
""
],
[
"Pratten",
"Geraint",
""
],
[
"Thomas",
"Lucy M.",
""
]
] | Originally designed for waveform approximants, the effective precession parameter $\chi_\mathrm{p}$ is the most commonly used quantity to characterize spin-precession effects in gravitational-wave observations of black-hole binary coalescences. We point out that the current definition of $\chi_\mathrm{p}$ retains some,... |
gr-qc/0401057 | Sang Pyo Kim | Sang Pyo Kim (Kunsan Nat'l Univ.), Don N. Page (Univ. Alberta) | Remarks on Schwinger Pair Production by Charged Black Holes | RevTex 19 Pages; Proceedings of the 8th Italian-Korean Symposium on
Relativistic Astrophysics, Pescara, Italy, 2003 | Nuovo Cim. B120 (2005) 1193-1208 | 10.1393/ncb/i2005-10148-6 | null | gr-qc | null | We introduce a canonical method for pair production by electromagnetic
fields. The canonical method in the space-dependent gauge provides
pair-production rate even for inhomogeneous fields. Further, the instanton
action including all corrections leads to an accurate formula for the
pair-production rate. We discuss va... | [
{
"created": "Tue, 13 Jan 2004 19:51:58 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kim",
"Sang Pyo",
"",
"Kunsan Nat'l Univ."
],
[
"Page",
"Don N.",
"",
"Univ. Alberta"
]
] | We introduce a canonical method for pair production by electromagnetic fields. The canonical method in the space-dependent gauge provides pair-production rate even for inhomogeneous fields. Further, the instanton action including all corrections leads to an accurate formula for the pair-production rate. We discuss vari... |
gr-qc/9905011 | Jerry B. Griffiths | Rong-Gen Cai and J. B. Griffiths | Null particle solutions in three-dimensional (anti-) de Sitter spaces | 11 pages, LaTeX, To appear in J. Math. Phys | J.Math.Phys. 40 (1999) 3465-3475 | 10.1063/1.532900 | null | gr-qc | null | We obtain a class of exact solutions representing null particles moving in
three-dimensional (anti-) de Sitter spaces by boosting the corresponding static
point source solutions given by Deser and Jackiw. In de Sitter space the
resulting solution describes two null particles moving on the (circular)
cosmological hori... | [
{
"created": "Tue, 4 May 1999 14:06:15 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Griffiths",
"J. B.",
""
]
] | We obtain a class of exact solutions representing null particles moving in three-dimensional (anti-) de Sitter spaces by boosting the corresponding static point source solutions given by Deser and Jackiw. In de Sitter space the resulting solution describes two null particles moving on the (circular) cosmological horizo... |
1504.05839 | Yungui Gong | Nan Yang, Qin Fei, Qing Gao and Yungui Gong | Inflationary models with non-minimally derivative coupling | v2: add the general formulae without taking the high friction limit,
accepted for publication in CQG | Class. Quantum Grav. 33 (2016) 205001 | 10.1088/0264-9381/33/20/205001 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the general formulae for the the scalar and tensor spectral tilts
to the second order for the inflationary models with non-minimally derivative
coupling without taking the high friction limit. The non-minimally kinetic
coupling to Einstein tensor brings the energy scale in the inflationary models
down to be... | [
{
"created": "Wed, 22 Apr 2015 14:58:03 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2016 13:31:05 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Yang",
"Nan",
""
],
[
"Fei",
"Qin",
""
],
[
"Gao",
"Qing",
""
],
[
"Gong",
"Yungui",
""
]
] | We derive the general formulae for the the scalar and tensor spectral tilts to the second order for the inflationary models with non-minimally derivative coupling without taking the high friction limit. The non-minimally kinetic coupling to Einstein tensor brings the energy scale in the inflationary models down to be s... |
1607.03540 | Luca Baiotti | Luca Baiotti and Luciano Rezzolla | Binary neutron-star mergers: a review of Einstein's richest laboratory | 106 pages; invited review from Reports on Progress of Physics; small
changes, matches version to be published | 2017 Rep. Prog. Phys. 80 096901 | 10.1088/1361-6633/aa67bb | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The merger of binary neutron-stars systems combines in a single process:
extreme gravity, copious emission of gravitational waves, complex microphysics,
and electromagnetic processes that can lead to astrophysical signatures
observable at the largest redshifts. We review here the recent progress in
understanding what... | [
{
"created": "Tue, 12 Jul 2016 23:03:39 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Mar 2017 21:26:33 GMT",
"version": "v2"
}
] | 2018-02-21 | [
[
"Baiotti",
"Luca",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | The merger of binary neutron-stars systems combines in a single process: extreme gravity, copious emission of gravitational waves, complex microphysics, and electromagnetic processes that can lead to astrophysical signatures observable at the largest redshifts. We review here the recent progress in understanding what c... |
1908.07227 | Troels Harmark | Gianluca Grignani, Troels Harmark and Marta Orselli | Force-free electrodynamics near rotation axis of a Kerr black hole | 10 pages. v3: Discussion of the outer light surface expanded
considerably. Assumptions are clarified | null | 10.1088/1361-6382/ab7ac7 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite their potential importance for understanding astrophysical jets,
physically realistic exact solutions for magnetospheres around Kerr black holes
have not been found, even in the force-free approximation. Instead approximate
analytical solutions such as the Blandford-Znajek (split-)monopole, as well as
numeric... | [
{
"created": "Tue, 20 Aug 2019 08:55:49 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Nov 2019 12:18:04 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Jan 2020 13:37:52 GMT",
"version": "v3"
}
] | 2020-06-17 | [
[
"Grignani",
"Gianluca",
""
],
[
"Harmark",
"Troels",
""
],
[
"Orselli",
"Marta",
""
]
] | Despite their potential importance for understanding astrophysical jets, physically realistic exact solutions for magnetospheres around Kerr black holes have not been found, even in the force-free approximation. Instead approximate analytical solutions such as the Blandford-Znajek (split-)monopole, as well as numerical... |
1306.4616 | Eugen Radu | Burkhard Kleihaus, Jutta Kunz, Eugen Radu and Bintoro Subagyo | Axially symmetric static scalar solitons and black holes with scalar
hair | 8 pages, 3 figures | null | 10.1016/j.physletb.2013.07.051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct static, asymptotically flat black hole solutions with scalar
hair. They evade the no-hair theorems by having a scalar potential which is not
strictly positive. By including an azimuthal winding number in the scalar field
ansatz, we find hairy black hole solutions which are static but axially
symmetric on... | [
{
"created": "Wed, 19 Jun 2013 17:01:22 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
],
[
"Subagyo",
"Bintoro",
""
]
] | We construct static, asymptotically flat black hole solutions with scalar hair. They evade the no-hair theorems by having a scalar potential which is not strictly positive. By including an azimuthal winding number in the scalar field ansatz, we find hairy black hole solutions which are static but axially symmetric only... |
0805.4614 | Hongbao Zhang | Song He and Hongbao Zhang | A covariant entropy bound conjecture on the dynamical horizon | JHEP style, 9 pages, 1 figure, honorable mention award received from
Gravity Research Foundation for 2008 Essay Competition | Int.J.Mod.Phys.D17:2467-2474,2009 | 10.1142/S0218271808014163 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As a compelling pattern for the holographic principle, our covariant entropy
bound conjecture is proposed for more general dynamical horizons. Then we apply
our conjecture to $\Lambda$CDM cosmological models, where we find it imposes a
novel upper bound $10^{-90}$ on the cosmological constant for our own universe
by ... | [
{
"created": "Thu, 29 May 2008 19:53:57 GMT",
"version": "v1"
},
{
"created": "Thu, 29 May 2008 20:04:48 GMT",
"version": "v2"
}
] | 2009-03-20 | [
[
"He",
"Song",
""
],
[
"Zhang",
"Hongbao",
""
]
] | As a compelling pattern for the holographic principle, our covariant entropy bound conjecture is proposed for more general dynamical horizons. Then we apply our conjecture to $\Lambda$CDM cosmological models, where we find it imposes a novel upper bound $10^{-90}$ on the cosmological constant for our own universe by ta... |
2205.01363 | Genly Le\'on | Genly Leon, A. Paliathanasis and P.G.L. Leach | New analytic solutions in $f\left( R\right) $-Cosmology from
Painlev\'{e} analysis | 16 pages, no figures | Math. Meth. Appl. Sci. (2024), 1-9 | 10.1002/mma.9921 | null | gr-qc math-ph math.MP nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the singularity analysis, we investigate the integrability properties
and existence of analytic solutions in $f\left( R\right)$-cosmology.
Specifically, for some power-law $f\left( R\right) $-theories of particular
interest, we apply the ARS algorithm to prove if the field equations possess
the Painlev\'{e} pro... | [
{
"created": "Tue, 3 May 2022 08:23:47 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2024 03:30:38 GMT",
"version": "v2"
}
] | 2024-03-27 | [
[
"Leon",
"Genly",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Leach",
"P. G. L.",
""
]
] | Using the singularity analysis, we investigate the integrability properties and existence of analytic solutions in $f\left( R\right)$-cosmology. Specifically, for some power-law $f\left( R\right) $-theories of particular interest, we apply the ARS algorithm to prove if the field equations possess the Painlev\'{e} prope... |
2209.12692 | Naeem Ahmad Pundeer | Musavvir Ali, Mohammad Salman, Farook Rahaman and Naeem Ahmad Pundeer | On some properties of M-projective curvature tensor in spacetime of
general relativity | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the connection between the M-projective
curvature tensor and other tensors. Also, we obtain the divergence of
M-projective curvature tensor. A symmetry of spacetime known as M-projective
collineation has been presented, and it has been possible to determine the
conditions under which the... | [
{
"created": "Fri, 23 Sep 2022 12:50:48 GMT",
"version": "v1"
},
{
"created": "Fri, 26 May 2023 11:48:56 GMT",
"version": "v2"
}
] | 2023-05-29 | [
[
"Ali",
"Musavvir",
""
],
[
"Salman",
"Mohammad",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Pundeer",
"Naeem Ahmad",
""
]
] | In this paper, we investigate the connection between the M-projective curvature tensor and other tensors. Also, we obtain the divergence of M-projective curvature tensor. A symmetry of spacetime known as M-projective collineation has been presented, and it has been possible to determine the conditions under which the g... |
1412.3434 | Andrzej G\"orlich | Jan Ambj{\o}rn, Andrzej G\"orlich, Jerzy Jurkiewicz, Hongguang Zhang | The spectral dimension in 2D CDT gravity coupled to scalar fields | 13 pages, 8 figures | null | 10.1142/S0217732315500777 | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Causal Dynamical Triangulations (CDT) provide a non-perturbative formulation
of Quantum Gravity assuming the existence of a global time foliation. In our
earlier study we analyzed the effect of including $d$ copies of a massless
scalar field in the two-dimensional CDT model with imaginary time. For $d > 1$
we observe... | [
{
"created": "Wed, 10 Dec 2014 20:08:50 GMT",
"version": "v1"
}
] | 2015-04-15 | [
[
"Ambjørn",
"Jan",
""
],
[
"Görlich",
"Andrzej",
""
],
[
"Jurkiewicz",
"Jerzy",
""
],
[
"Zhang",
"Hongguang",
""
]
] | Causal Dynamical Triangulations (CDT) provide a non-perturbative formulation of Quantum Gravity assuming the existence of a global time foliation. In our earlier study we analyzed the effect of including $d$ copies of a massless scalar field in the two-dimensional CDT model with imaginary time. For $d > 1$ we observed ... |
1801.09630 | Parampreet Singh | Kristina Giesel, Adrian Herzog, Parampreet Singh | Gauge invariant variables for cosmological perturbation theory using
geometrical clocks | Discussion expanded, references added. To appear in Classical and
Quantum Gravity | null | 10.1088/1361-6382/aacda2 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the extended ADM-phase space formulation in the canonical framework we
analyze the relationship between various gauge choices made in cosmological
perturbation theory and the choice of geometrical clocks in the relational
formalism. We show that various gauge invariant variables obtained in the
conventional ana... | [
{
"created": "Mon, 29 Jan 2018 17:11:47 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Mar 2018 14:56:19 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jun 2018 00:04:13 GMT",
"version": "v3"
}
] | 2018-07-25 | [
[
"Giesel",
"Kristina",
""
],
[
"Herzog",
"Adrian",
""
],
[
"Singh",
"Parampreet",
""
]
] | Using the extended ADM-phase space formulation in the canonical framework we analyze the relationship between various gauge choices made in cosmological perturbation theory and the choice of geometrical clocks in the relational formalism. We show that various gauge invariant variables obtained in the conventional analy... |
2206.02140 | Qing Gao | Qing Gao | Constraint on the mass of graviton with gravitational waves | 23 pages, 3 tables, 4 figures. Minor changes to match the version
published on SCPMA(SCIENCE CHINA Physics, Mechanics & Astronomy) | Sci.China Phys.Mech.Astron. 66 (2023) 2, 220411 | 10.1007/s11433-022-1971-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the effects of the mass of graviton on both the waveform of
gravitational waves and the antenna response to gravitational waves. We find
the effect on the response function is negligible for small mass. By using the
Fisher matrix method, we make parameter estimations with space-based
gravitational wave de... | [
{
"created": "Sun, 5 Jun 2022 09:58:27 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2022 08:54:22 GMT",
"version": "v2"
}
] | 2022-11-28 | [
[
"Gao",
"Qing",
""
]
] | We consider the effects of the mass of graviton on both the waveform of gravitational waves and the antenna response to gravitational waves. We find the effect on the response function is negligible for small mass. By using the Fisher matrix method, we make parameter estimations with space-based gravitational wave dete... |
gr-qc/9404047 | Viqar Husain | Viqar Husain | Radiation collapse and gravitational waves in three dimensions | 9 pages (RevTeX) 1 figure upon request, Alberta-Thy-12-94 | Phys.Rev.D50:2361-2363,1994 | 10.1103/PhysRevD.50.R2361 | null | gr-qc | null | Two non-static solutions for three dimensional gravity coupled to matter
fields are given. One describes the collapse of radiation that results in a
black hole. This is the three dimensional analog of the Vaidya metric, and is
used to construct a model for mass inflation. The other describes plane
gravitational waves... | [
{
"created": "Tue, 26 Apr 1994 03:23:30 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Husain",
"Viqar",
""
]
] | Two non-static solutions for three dimensional gravity coupled to matter fields are given. One describes the collapse of radiation that results in a black hole. This is the three dimensional analog of the Vaidya metric, and is used to construct a model for mass inflation. The other describes plane gravitational waves f... |
gr-qc/9912078 | Tekin Dereli | Tekin Dereli (METU,Ankara), Yuri N. Obukhov (Moscow State Univ.) | Massless scalar fields and topological black holes | 15 pages, LATEX, no figures. (To appear in Phys. Rev. D) | Phys.Rev. D61 (2000) 084015 | 10.1103/PhysRevD.61.084015 | null | gr-qc | null | The exact static solutions in the higher dimensional Einstein-Maxwell-Klein-
Gordon theory are investigated. With the help of the methods developed for the
effective dilaton type gauge gravity models in two dimensions, we find new
spherically and hyperbolically symmetric solutions which generalize the four
dimensiona... | [
{
"created": "Sat, 18 Dec 1999 11:39:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dereli",
"Tekin",
"",
"METU,Ankara"
],
[
"Obukhov",
"Yuri N.",
"",
"Moscow State Univ."
]
] | The exact static solutions in the higher dimensional Einstein-Maxwell-Klein- Gordon theory are investigated. With the help of the methods developed for the effective dilaton type gauge gravity models in two dimensions, we find new spherically and hyperbolically symmetric solutions which generalize the four dimensional ... |
1607.03508 | Florencia Anabella Teppa Pannia | F. A. Teppa Pannia, F. Garc\'ia, S. E. Perez Bergliaffa, M. Orellana,
G. E. Romero | Structure of Compact Stars in R-squared Palatini Gravity | 9 pages, 5 figures. Accepted for publication in General Relativity
and Gravitation | null | 10.1007/s10714-016-2182-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse configurations of compact stars in the so-called R-squared gravity
in the Palatini formalism. Using a realistic equation of state we show that the
mass-radius configurations are lighter than their counterparts in General
Relativity. We also obtain the internal profiles, which run in strong
correlation with... | [
{
"created": "Fri, 1 Jul 2016 13:11:42 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Dec 2016 17:23:55 GMT",
"version": "v2"
}
] | 2016-12-28 | [
[
"Pannia",
"F. A. Teppa",
""
],
[
"García",
"F.",
""
],
[
"Bergliaffa",
"S. E. Perez",
""
],
[
"Orellana",
"M.",
""
],
[
"Romero",
"G. E.",
""
]
] | We analyse configurations of compact stars in the so-called R-squared gravity in the Palatini formalism. Using a realistic equation of state we show that the mass-radius configurations are lighter than their counterparts in General Relativity. We also obtain the internal profiles, which run in strong correlation with t... |
1310.7250 | Farhad Darabi | M. R. Setare and F. Darabi | Polytropic inspired inflation | 8 pages | CHINESE JOURNAL OF PHYSICS VOL. 51, NO. 3, 2013, 427 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the chaotic inflation in the context of a gravity theory where the
Friedman equation is modified, inspired by the polytropic gas equation of
state. It is seen that in the $n=1$ case for the polytropic index the inflaton
field at the end of inflation $\phi_e$, depends on the Planck mass, while for
$n\neq1$ it... | [
{
"created": "Sun, 27 Oct 2013 20:52:00 GMT",
"version": "v1"
}
] | 2013-10-29 | [
[
"Setare",
"M. R.",
""
],
[
"Darabi",
"F.",
""
]
] | We study the chaotic inflation in the context of a gravity theory where the Friedman equation is modified, inspired by the polytropic gas equation of state. It is seen that in the $n=1$ case for the polytropic index the inflaton field at the end of inflation $\phi_e$, depends on the Planck mass, while for $n\neq1$ it g... |
gr-qc/9702044 | Henrique Oliveira | H. P. de Oliveira, I. Damiao Soares and T. J. Stuchi | Chaos in Anisotropic Pre-Inflationary Universes | 14 pages, figures available under request. submitted to Physical
Review D | Phys.Rev. D56 (1997) 730-740 | 10.1103/PhysRevD.56.730 | null | gr-qc | null | We study the dynamics of anisotropic Bianchi type-IX models with matter and
cosmological constant. The models can be thought as describing the role of
anisotropy in the early stages of inflation. The concurrence of the
cosmological constant and anisotropy are sufficient to produce a chaotic
dynamics in the gravitatio... | [
{
"created": "Fri, 21 Feb 1997 20:44:13 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"de Oliveira",
"H. P.",
""
],
[
"Soares",
"I. Damiao",
""
],
[
"Stuchi",
"T. J.",
""
]
] | We study the dynamics of anisotropic Bianchi type-IX models with matter and cosmological constant. The models can be thought as describing the role of anisotropy in the early stages of inflation. The concurrence of the cosmological constant and anisotropy are sufficient to produce a chaotic dynamics in the gravitationa... |
1304.0550 | Eddy Sham | Y.-H. Sham, P. T. Leung, and L.-M. Lin | Compact stars in Eddington-inspired Born-Infeld gravity: Anomalies
associated with phase transitions | 8 pages, 2 figures | Physical Review D 87, 061503(R) (2013) | 10.1103/PhysRevD.87.061503 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how generic phase transitions taking place in compact stars
constructed in the framework of the Eddington-inspired Born-Infeld (EiBI)
gravity can lead to anomalous behavior of these stars. For the case with
first-order phase transitions, compact stars in EiBI gravity with a positive
coupling parameter $\kapp... | [
{
"created": "Tue, 2 Apr 2013 07:51:35 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Apr 2013 07:56:24 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Sham",
"Y. -H.",
""
],
[
"Leung",
"P. T.",
""
],
[
"Lin",
"L. -M.",
""
]
] | We study how generic phase transitions taking place in compact stars constructed in the framework of the Eddington-inspired Born-Infeld (EiBI) gravity can lead to anomalous behavior of these stars. For the case with first-order phase transitions, compact stars in EiBI gravity with a positive coupling parameter $\kappa ... |
2210.15433 | Gopi Kant Goswami Dr | Anirudh Pradhan, Gopikant Goswami, Rita Rani, Aroonkumar Beesham | An f(R,T) Gravity Based FLRW Model and Observational Constraints | 19 pages, 8 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We attempt to construct a Friedmann-Lemaitre-Robertson-Walker(FLRW)
cosmological model in $f(R, T)$ gravity which exhibits a phase transition from
deceleration to acceleration at present. We take $f(R,T) = R + 2 \lambda T$,
$\lambda$ being an arbitrary constant. In our model, the $\lambda$ parameter
develops a negati... | [
{
"created": "Wed, 26 Oct 2022 13:55:34 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Dec 2022 16:33:59 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Jun 2023 17:46:32 GMT",
"version": "v3"
}
] | 2023-06-05 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Goswami",
"Gopikant",
""
],
[
"Rani",
"Rita",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | We attempt to construct a Friedmann-Lemaitre-Robertson-Walker(FLRW) cosmological model in $f(R, T)$ gravity which exhibits a phase transition from deceleration to acceleration at present. We take $f(R,T) = R + 2 \lambda T$, $\lambda$ being an arbitrary constant. In our model, the $\lambda$ parameter develops a negative... |
1511.00231 | Wei-Tou Ni | Kazuaki Kuroda, Wei-Tou Ni and Wei-Ping Pan | Gravitational waves: Classification, Methods of detection,
Sensitivities, and Sources | 38 pages, 4 figures, 6 tables. Chapter 10 in One Hundred Years of
General Relativity: From Genesis and Empirical Foundations to Gravitational
Waves, Cosmology and Quantum Gravity, ed.W.-T. Ni (World Scientific,
Singapore, 2015); Int. J. Mod. Phys. D, to be published | Int. J. Mod. Phys. D, Vol. 24, No. 14 (2015) 1530031 | 10.1142/S0218271815300311 | null | gr-qc astro-ph.CO astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After giving a brief introduction and presenting a complete classification of
gravitational waves (GWs) according to their frequencies, we review and
summarize the detection methods, the sensitivities, and the sources. We notice
that real-time detections are possible above 300 pHz. Below 300 pHz, the
detections are p... | [
{
"created": "Sun, 1 Nov 2015 11:31:31 GMT",
"version": "v1"
}
] | 2016-02-03 | [
[
"Kuroda",
"Kazuaki",
""
],
[
"Ni",
"Wei-Tou",
""
],
[
"Pan",
"Wei-Ping",
""
]
] | After giving a brief introduction and presenting a complete classification of gravitational waves (GWs) according to their frequencies, we review and summarize the detection methods, the sensitivities, and the sources. We notice that real-time detections are possible above 300 pHz. Below 300 pHz, the detections are pos... |
1203.0112 | Dong-han Yeom | Dong-il Hwang, Bum-Hoon Lee, Hanno Sahlmann, Dong-han Yeom | The no-boundary measure in string theory: Applications to moduli
stabilization, flux compactification, and cosmic landscape | 27 pages, 8 figures | Class.Quant.Grav.29:175001,2012 | 10.1088/0264-9381/29/17/175001 | APCTP Pre2012-003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the no-boundary measure in the context of moduli
stabilization. To this end, we first show that for exponential potentials,
there are no classical histories once the slope exceeds a critical value. We
also investigate the probability distributions given by the no-boundary wave
function near maxima of t... | [
{
"created": "Thu, 1 Mar 2012 08:11:08 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Aug 2012 03:21:42 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Hwang",
"Dong-il",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Sahlmann",
"Hanno",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We investigate the no-boundary measure in the context of moduli stabilization. To this end, we first show that for exponential potentials, there are no classical histories once the slope exceeds a critical value. We also investigate the probability distributions given by the no-boundary wave function near maxima of the... |
1505.00541 | Patrick Das Gupta | Patrick Das Gupta | Gravity, Bose-Einstein Condensates and Gross-Pitaevskii Equation | This paper was presented at the Discussion Meeting on Quantum
Measurements, I.I.Sc., Bangalore, in 2014 | Current Science, Volume 109, pp. 1946-1950 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the effect of mutual gravitational interaction between ultra-cold
gas atoms on the dynamics of Bose-Einstein condensates (BEC). Small amplitude
oscillation of BEC is studied by applying variational technique to reduce the
Gross-Pitaevskii equation, with gravity included, to the equation of motion of
a part... | [
{
"created": "Mon, 4 May 2015 08:00:21 GMT",
"version": "v1"
}
] | 2018-12-27 | [
[
"Gupta",
"Patrick Das",
""
]
] | We explore the effect of mutual gravitational interaction between ultra-cold gas atoms on the dynamics of Bose-Einstein condensates (BEC). Small amplitude oscillation of BEC is studied by applying variational technique to reduce the Gross-Pitaevskii equation, with gravity included, to the equation of motion of a partic... |
1603.08798 | Abdul Jawad | Abdul Jawad, Amara Ilyas and Shamaila Rani | Dynamics of Modified Chaplygin Gas Inflation on the Brane with Bulk
Viscous Pressure | 21 pages, 8 figures | Int. J. Mod. Phys. D 26 (2017) 1750031 | 10.1142/S0218271817500316 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the role of bulk viscous pressure on the warm inflationary
modified Chaplygin gas in brane-world framework in the presence of standard
scalar field. We assume the intermediate inflationary scenario in strong
dissipative regime and constructed the inflaton, potential, entropy density,
slow-roll paramete... | [
{
"created": "Tue, 29 Mar 2016 14:59:12 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Mar 2016 11:09:27 GMT",
"version": "v2"
},
{
"created": "Sun, 14 Aug 2016 13:50:24 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Nov 2016 09:00:17 GMT",
"version": "v4"
}
] | 2017-02-22 | [
[
"Jawad",
"Abdul",
""
],
[
"Ilyas",
"Amara",
""
],
[
"Rani",
"Shamaila",
""
]
] | We investigate the role of bulk viscous pressure on the warm inflationary modified Chaplygin gas in brane-world framework in the presence of standard scalar field. We assume the intermediate inflationary scenario in strong dissipative regime and constructed the inflaton, potential, entropy density, slow-roll parameters... |
2110.10917 | Masaya Amo | Masaya Amo, Tetsuya Shiromizu, Keisuke Izumi, Hirotaka Yoshino,
Yoshimune Tomikawa | Asymptotic behavior of null geodesics near future null infinity II:
curvatures, photon surface and dynamically transversely trapping surface | 17 pages, no figures, published version | Phys. Rev. D 105, 064074 (2022) | 10.1103/PhysRevD.105.064074 | YITP-21-103, KOBE-COSMO-21-15, OCU-PHYS-550, AP-GR-174 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bearing in mind our previous study on asymptotic behavior of null geodesics
near future null infinity, we analyze the behavior of geometrical quantities
such as a certain extrinsic curvature and Riemann tensor in the Bondi
coordinates. In the sense of asymptotics, the condition for an $r$-constant
hypersurface to be ... | [
{
"created": "Thu, 21 Oct 2021 06:15:08 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Apr 2022 10:59:47 GMT",
"version": "v2"
}
] | 2022-04-04 | [
[
"Amo",
"Masaya",
""
],
[
"Shiromizu",
"Tetsuya",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Yoshino",
"Hirotaka",
""
],
[
"Tomikawa",
"Yoshimune",
""
]
] | Bearing in mind our previous study on asymptotic behavior of null geodesics near future null infinity, we analyze the behavior of geometrical quantities such as a certain extrinsic curvature and Riemann tensor in the Bondi coordinates. In the sense of asymptotics, the condition for an $r$-constant hypersurface to be a ... |
1306.5410 | Richard Woodard | S. P. Miao (National Cheng Kung U.), P. J. Mora (U. Florida), N. C.
Tsamis (U. Crete) and R. P. Woodard (U. Florida) | The Perils of Analytic Continuation | 40 pages, 2 figures (6 figure files), uses LaTeX2e, Version 2
expanded to 43 pages, principally in section 3 to show that even the closed
coordinate mode sums break de Sitter invariance and that claims to the
contrary are based upon the (admitted) use of negative normed states | Phys. Rev. D 89, 104004 (2014) | 10.1103/PhysRevD.89.104004 | UFIFT-QG-13-03 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A nice paper by Morrison demonstrates the recent convergence of opinion that
has taken place concerning the graviton propagator on de Sitter background. We
here discuss the few points which remain under dispute. First, the inevitable
decay of tachyonic scalars really does result in their 2-point functions
breaking de... | [
{
"created": "Sun, 23 Jun 2013 14:03:50 GMT",
"version": "v1"
},
{
"created": "Thu, 8 May 2014 07:43:46 GMT",
"version": "v2"
}
] | 2014-05-09 | [
[
"Miao",
"S. P.",
"",
"National Cheng Kung U."
],
[
"Mora",
"P. J.",
"",
"U. Florida"
],
[
"Tsamis",
"N. C.",
"",
"U. Crete"
],
[
"Woodard",
"R. P.",
"",
"U. Florida"
]
] | A nice paper by Morrison demonstrates the recent convergence of opinion that has taken place concerning the graviton propagator on de Sitter background. We here discuss the few points which remain under dispute. First, the inevitable decay of tachyonic scalars really does result in their 2-point functions breaking de S... |
gr-qc/0107014 | Martin Tajmar | C.J. de Matos, M. Tajmar | Gravitational Poynting Vector and Gravitational Larmor Theorem in
Rotating Bodies with Angular Acceleration | null | null | null | null | gr-qc | null | The gravitational Poynting vector provides a mechanism for the transfer of
gravitational energy to a system of falling objects. In the following we will
show that the gravitational poynting vector together with the gravitational
Larmor theorem also provides a mechanism to explain how massive bodies acquire
rotational... | [
{
"created": "Wed, 4 Jul 2001 07:33:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Matos",
"C. J.",
""
],
[
"Tajmar",
"M.",
""
]
] | The gravitational Poynting vector provides a mechanism for the transfer of gravitational energy to a system of falling objects. In the following we will show that the gravitational poynting vector together with the gravitational Larmor theorem also provides a mechanism to explain how massive bodies acquire rotational k... |
1901.08499 | Rudolf Baier | Rudolf Baier | On gravitational spherical collapse without spacetime singularity | 13 pages, 5 figures | null | null | BI-TP 2019/02 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note discusses possible quantum effects in the context of homogeneous
flat FLRW and inhomogeneous LTB gravitational spherical collapse, which lead to
bounce solutions.
| [
{
"created": "Tue, 22 Jan 2019 14:21:45 GMT",
"version": "v1"
}
] | 2019-01-25 | [
[
"Baier",
"Rudolf",
""
]
] | This note discusses possible quantum effects in the context of homogeneous flat FLRW and inhomogeneous LTB gravitational spherical collapse, which lead to bounce solutions. |
1808.07987 | Sebastian Schuster | Sebastian Schuster (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Electromagnetic analogue space-times, analytically and algebraically | 27 pages, 11 figures, 1 table; v2: Now 35 pages, improved discussion,
minor corrections, no physics changes, matched to published version | Classical and Quantum Gravity 36, 134004 (2019) | 10.1088/1361-6382/ab2159 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While quantum field theory could more aptly be called the "quantum field
framework" $-$ as it encompasses a vast variety of varying concepts and
theories $-$ in comparison, relativity, both special and general, is more
commonly portrayed as less of a "general framework". Viewed from this
perspective, the paradigm of ... | [
{
"created": "Fri, 24 Aug 2018 02:56:57 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jun 2019 15:36:12 GMT",
"version": "v2"
}
] | 2019-06-27 | [
[
"Schuster",
"Sebastian",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | While quantum field theory could more aptly be called the "quantum field framework" $-$ as it encompasses a vast variety of varying concepts and theories $-$ in comparison, relativity, both special and general, is more commonly portrayed as less of a "general framework". Viewed from this perspective, the paradigm of "a... |
1709.09193 | Swagat Saurav Mishra | Satadru Bag, Swagat S. Mishra and Varun Sahni | New tracker models of dark energy | 24 pages, 16 figures, matches published version in JCAP | JCAP 08 (2018) 009 | 10.1088/1475-7516/2018/08/009 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new class of dark energy (DE) models which behave like
cosmological trackers at early times. These models are based on the
$\alpha$-attractor set of potentials, originally discussed in the context of
inflation. The new models allow the current acceleration of the universe to be
reached from a wide class... | [
{
"created": "Tue, 26 Sep 2017 18:01:44 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2017 15:33:24 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Jun 2018 11:31:36 GMT",
"version": "v3"
},
{
"created": "Wed, 15 Aug 2018 05:57:22 GMT",
"version": "v4"
}
] | 2018-08-16 | [
[
"Bag",
"Satadru",
""
],
[
"Mishra",
"Swagat S.",
""
],
[
"Sahni",
"Varun",
""
]
] | We describe a new class of dark energy (DE) models which behave like cosmological trackers at early times. These models are based on the $\alpha$-attractor set of potentials, originally discussed in the context of inflation. The new models allow the current acceleration of the universe to be reached from a wide class o... |
2304.09482 | Olivier Minazzoli | Olivier Minazzoli | Standard quantum field theory from entangled relativity | Contribution to the 2023 Gravitation session of the 57th Rencontres
de Moriond
(https://moriond.in2p3.fr/2023/Gravitation/gravitation-agenda.html) | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Despite its non-linear form, entangled relativity possesses both general
relativity and standard quantum field theory in a specific (but generic) limit.
On one side it means that the theory is consistent with our current
understanding of elementary physics. But on the other side it means that our
current understandin... | [
{
"created": "Wed, 19 Apr 2023 08:07:04 GMT",
"version": "v1"
}
] | 2023-04-20 | [
[
"Minazzoli",
"Olivier",
""
]
] | Despite its non-linear form, entangled relativity possesses both general relativity and standard quantum field theory in a specific (but generic) limit. On one side it means that the theory is consistent with our current understanding of elementary physics. But on the other side it means that our current understanding ... |
2101.07638 | Tomi Koivisto | Tomi Koivisto, Luxi Zheng | Scale-invariant cosmology in de Sitter gauge theory | 9 pages, 0 figures | Phys. Rev. D 103, 124063 (2021) | 10.1103/PhysRevD.103.124063 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The Planck mass and the cosmological constant determine the minimum and the
maximum distances in the physical universe. A relativistic theory that takes
into account a fundamental distance limit $\ell$ on par with the fundamental
speed limit $c$, is based on the de Sitter extension of the Lorentz symmetry.
This artic... | [
{
"created": "Tue, 19 Jan 2021 14:28:21 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Koivisto",
"Tomi",
""
],
[
"Zheng",
"Luxi",
""
]
] | The Planck mass and the cosmological constant determine the minimum and the maximum distances in the physical universe. A relativistic theory that takes into account a fundamental distance limit $\ell$ on par with the fundamental speed limit $c$, is based on the de Sitter extension of the Lorentz symmetry. This article... |
gr-qc/9811067 | Eduardo Sergio Santini | N. Pinto-Neto and E. Sergio Santini | Must Quantum Spacetimes Be Euclidean? | 42 pages LaTeX, last version with minor corrections, being the most
importants on pages 0, 6, 11, 21, 23, and 30 . The new title does not change
our conclusions | Phys. Rev. D 59, 123517 (1999) | 10.1103/PhysRevD.59.123517 | null | gr-qc | null | The Bohm-de Broglie interpretation of quantum mechanics is applied to
canonical quantum cosmology. It is shown that, irrespective of any
regularization or choice of factor ordering of the Wheeler-DeWitt equation, the
unique relevant quantum effect which does not break spacetime is the change of
its signature from lor... | [
{
"created": "Thu, 19 Nov 1998 16:34:09 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 1998 17:51:57 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Pinto-Neto",
"N.",
""
],
[
"Santini",
"E. Sergio",
""
]
] | The Bohm-de Broglie interpretation of quantum mechanics is applied to canonical quantum cosmology. It is shown that, irrespective of any regularization or choice of factor ordering of the Wheeler-DeWitt equation, the unique relevant quantum effect which does not break spacetime is the change of its signature from loren... |
2212.09499 | Zeeshan Gul | M. Sharif and M. Zeeshan Gul | Noether Symmetries and Some Exact Solutions in $f(R, T^{2})$ Theory | Accepted | null | 10.1134/S106377612303007X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main objective of this article is to examine some physically viable
solutions through the Noether symmetry technique in $f(R, T^{2})$ theory. For
this purpose, we assume a generalized anisotropic and homogenous spacetime that
yields distinct cosmic models. In order to investigate Noether equations,
symmetry gener... | [
{
"created": "Fri, 16 Dec 2022 03:23:45 GMT",
"version": "v1"
}
] | 2023-06-14 | [
[
"Sharif",
"M.",
""
],
[
"Gul",
"M. Zeeshan",
""
]
] | The main objective of this article is to examine some physically viable solutions through the Noether symmetry technique in $f(R, T^{2})$ theory. For this purpose, we assume a generalized anisotropic and homogenous spacetime that yields distinct cosmic models. In order to investigate Noether equations, symmetry generat... |
2003.11754 | Sanjay Siwach | Dharm Veer Singh and Sanjay Siwach | Thermodynamics and P-v criticality of Bardeen-AdS Black Hole in 4-D
Einstein-Gauss-Bonnet Gravity | 12 pages, 5 figures, minor changes, references added | null | 10.1016/j.physletb.2020.135658 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Gauss-Bonnet corrected Bardeen black hole solution in 4-D AdS
space-time. The solution is obtained by the limiting procedure adopted by
Glavan and Lin in 4-D Einstein-Gauss-Bonnet gravity. The general form of first
law of black hole thermodynamics is utilized to calculate various
thermodynamics variab... | [
{
"created": "Thu, 26 Mar 2020 06:14:04 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Apr 2020 05:51:01 GMT",
"version": "v2"
}
] | 2020-08-05 | [
[
"Singh",
"Dharm Veer",
""
],
[
"Siwach",
"Sanjay",
""
]
] | We consider the Gauss-Bonnet corrected Bardeen black hole solution in 4-D AdS space-time. The solution is obtained by the limiting procedure adopted by Glavan and Lin in 4-D Einstein-Gauss-Bonnet gravity. The general form of first law of black hole thermodynamics is utilized to calculate various thermodynamics variable... |
1908.06743 | Sarbari Guha Dr. | Sucheta Datta and Sarbari Guha | Propagation of Gravitational Waves in Anisotropic Universe | 14 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered a toy model of an anisotropic universe and
studied the propagation of gravitational waves in such a universe. The
consideration of this toy model simplifies the analysis and helps us to
illustrate the effects of anisotropy. Incorporating linear perturbations on
this anisotropic backg... | [
{
"created": "Wed, 14 Aug 2019 16:02:24 GMT",
"version": "v1"
}
] | 2019-08-20 | [
[
"Datta",
"Sucheta",
""
],
[
"Guha",
"Sarbari",
""
]
] | In this paper, we have considered a toy model of an anisotropic universe and studied the propagation of gravitational waves in such a universe. The consideration of this toy model simplifies the analysis and helps us to illustrate the effects of anisotropy. Incorporating linear perturbations on this anisotropic backgro... |
1709.10341 | Sergey Mirzoyan | V. G. Gurzadyan, I. Ciufolini, A.Paolozzi, A.L. Kashin, H.G.
Khachatryan, S. Mirzoyan and G. Sindoni | Satellites testing general relativity: residuals versus perturbations | 7 pages 3 figures | IJMPD, 26 (2017) 1741020 | 10.1142/S0218271817410206 | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Laser ranging satellites have proved their efficiency for high precision
testing of the effect of frame-dragging, one of remarkable predictions of the
General Relativity. The analysis of the randomness properties of the residuals
of LAGEOS and LAGEOS 2 satellites reveals the role of the thermal thrust --
Yarkovsky ef... | [
{
"created": "Thu, 28 Sep 2017 05:35:09 GMT",
"version": "v1"
}
] | 2017-10-04 | [
[
"Gurzadyan",
"V. G.",
""
],
[
"Ciufolini",
"I.",
""
],
[
"Paolozzi",
"A.",
""
],
[
"Kashin",
"A. L.",
""
],
[
"Khachatryan",
"H. G.",
""
],
[
"Mirzoyan",
"S.",
""
],
[
"Sindoni",
"G.",
""
]
] | Laser ranging satellites have proved their efficiency for high precision testing of the effect of frame-dragging, one of remarkable predictions of the General Relativity. The analysis of the randomness properties of the residuals of LAGEOS and LAGEOS 2 satellites reveals the role of the thermal thrust -- Yarkovsky effe... |
gr-qc/0703124 | Bijan Saha | Bijan Saha | Interacting spinor and scalar fields in Bianchi type-I Universe filled
with viscous fluid: exact and numerical solutions | 18 pages, 6 figures | Gravitation & Cosmology, 15(4), (2009) 353 - 361 | 10.1134/S0202289309040112 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a self-consistent system of spinor and scalar fields within the
framework of a Bianchi type I gravitational field filled with viscous fluid in
presence of a $\Lambda$ term. Exact self-consistent solutions to the
corresponding spinor, scalar and BI gravitational field equations are obtained
in terms of $\t... | [
{
"created": "Mon, 26 Mar 2007 12:12:24 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 2008 10:58:24 GMT",
"version": "v2"
}
] | 2019-04-22 | [
[
"Saha",
"Bijan",
""
]
] | We consider a self-consistent system of spinor and scalar fields within the framework of a Bianchi type I gravitational field filled with viscous fluid in presence of a $\Lambda$ term. Exact self-consistent solutions to the corresponding spinor, scalar and BI gravitational field equations are obtained in terms of $\tau... |
1704.07366 | Sumanta Chakraborty | Sumanta Chakraborty | Field equations for Lovelock gravity: An alternative route | Invited Article; 11 pages, no figures | Adv. High Energy Phys. 6509045 (2018) | 10.1155/2018/6509045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an alternative derivation of the gravitational field equations for
Lovelock gravity starting from the Newton's law, which is closer in spirit to
the thermodynamic description of gravity. As a warm up exercise, we have
explicitly demonstrated that projecting the Riemann curvature tensor
appropriately and ta... | [
{
"created": "Sat, 22 Apr 2017 05:34:15 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Apr 2018 00:37:23 GMT",
"version": "v2"
}
] | 2018-04-23 | [
[
"Chakraborty",
"Sumanta",
""
]
] | We present an alternative derivation of the gravitational field equations for Lovelock gravity starting from the Newton's law, which is closer in spirit to the thermodynamic description of gravity. As a warm up exercise, we have explicitly demonstrated that projecting the Riemann curvature tensor appropriately and taki... |
2301.02216 | Riasat Ali | Riasat Ali, Zunaira Akhtar, Rimsha Babar, G. Mustafa and Xia Tiecheng | Logarithm Corrections and Thermodynamics for Horndeski gravity like
Black Holes | 14 Pages, 9 figures, Published in New Astronomy | New Astronomy Vol. 100, May 2023, 101976 | 10.1016/j.newast.2022.101976 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we compute the Hawking temperature by applying quantum
tunneling approach for the Horndeski like black holes. We utilize the
semi-classical phenomenon and WKB approximation to the Lagrangian field
equation involving generalized uncertainty principle (GUP) and compute the
tunneling rate as well as Hawki... | [
{
"created": "Thu, 5 Jan 2023 18:38:06 GMT",
"version": "v1"
}
] | 2023-01-06 | [
[
"Ali",
"Riasat",
""
],
[
"Akhtar",
"Zunaira",
""
],
[
"Babar",
"Rimsha",
""
],
[
"Mustafa",
"G.",
""
],
[
"Tiecheng",
"Xia",
""
]
] | In this paper, we compute the Hawking temperature by applying quantum tunneling approach for the Horndeski like black holes. We utilize the semi-classical phenomenon and WKB approximation to the Lagrangian field equation involving generalized uncertainty principle (GUP) and compute the tunneling rate as well as Hawking... |
gr-qc/0408044 | Edward Malec | Edward Malec and Niall \'O Murchadha | The Jang equation, apparent horizons, and the Penrose inequality | minor misprints corrected | Class.Quant.Grav. 21 (2004) 5777-5788 | 10.1088/0264-9381/21/24/007 | null | gr-qc | null | The Jang equation in the spherically symmetric case reduces to a first order
equation. This permits an easy analysis of the role apparent horizons play in
the (non)existence of solutions. We demonstrate that the proposed derivation of
the Penrose inequality based on the Jang equation cannot work in the
spherically sy... | [
{
"created": "Mon, 16 Aug 2004 06:49:49 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Dec 2004 11:44:14 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Malec",
"Edward",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | The Jang equation in the spherically symmetric case reduces to a first order equation. This permits an easy analysis of the role apparent horizons play in the (non)existence of solutions. We demonstrate that the proposed derivation of the Penrose inequality based on the Jang equation cannot work in the spherically symm... |
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