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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9711026 | Marcelo Jose Reboucas | M.J. Reboucas, R.K. Tavakol, A.F.F. Teixeira | Topology and Fragility in Cosmology | 12 pages, LaTex file, to appear in Gen. Rel. Grav. (1998) | Gen.Rel.Grav. 30 (1998) 535-543 | 10.1023/A:1018809922606 | CBPF-NF-036/96 | gr-qc astro-ph hep-ph hep-th | null | We introduce the notion of topological fragility and briefly discuss some
examples from the literature. An important example of this type of fragility is
the way globally anisotropic Bianchi V generalisations of the FLRW $k=-1$ model
result in a radical restriction on the allowed topology of spatial sections,
thereby... | [
{
"created": "Thu, 6 Nov 1997 23:34:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Reboucas",
"M. J.",
""
],
[
"Tavakol",
"R. K.",
""
],
[
"Teixeira",
"A. F. F.",
""
]
] | We introduce the notion of topological fragility and briefly discuss some examples from the literature. An important example of this type of fragility is the way globally anisotropic Bianchi V generalisations of the FLRW $k=-1$ model result in a radical restriction on the allowed topology of spatial sections, thereby e... |
1905.05007 | \"Ozg\"ur \"Okc\"u | \"Ozg\"ur \"Okc\"u, Ekrem Aydiner | GUP-Corrected van der Waals Black Holes | 16 pages, 7 figures, 1 appendix. References added. Accepted version | null | 10.1007/s10773-020-04544-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the generalized uncertainty principle (GUP) effects
for the van der Waals (vdW) black holes. In order to obtain the GUP-corrected
solution, we consider GUP-corrected black hole temperature. We also study the
thermodynamics and phase transition of GUP-corrected vdW black holes. We
compare the d... | [
{
"created": "Fri, 10 May 2019 00:48:38 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Dec 2019 16:49:23 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Jul 2020 11:33:32 GMT",
"version": "v3"
}
] | 2020-07-27 | [
[
"Ökcü",
"Özgür",
""
],
[
"Aydiner",
"Ekrem",
""
]
] | In this paper, we study the generalized uncertainty principle (GUP) effects for the van der Waals (vdW) black holes. In order to obtain the GUP-corrected solution, we consider GUP-corrected black hole temperature. We also study the thermodynamics and phase transition of GUP-corrected vdW black holes. We compare the dif... |
gr-qc/9509040 | Arkadiusz Blaut | Arkadiusz Blaut and Jerzy Kowalski-Glikman | Quantum Potential Approach to Class of Cosmological Models | The corrected version of gr-qc/9506081, 18 pages LaTeX, to appear in
Classical and Quantum Gravity | Class.Quant.Grav. 13 (1996) 39-50 | 10.1088/0264-9381/13/1/005 | null | gr-qc | null | In this paper we discuss the quantum potential approach of Bohm in the
context of quantum cosmological model. This approach makes it possible to
convert the wavefunction of the universe to a set of equations describing the
time evolution of the universe. Following Ashtekar et.\ al., we make use of
quantum canonical t... | [
{
"created": "Fri, 22 Sep 1995 13:12:04 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Blaut",
"Arkadiusz",
""
],
[
"Kowalski-Glikman",
"Jerzy",
""
]
] | In this paper we discuss the quantum potential approach of Bohm in the context of quantum cosmological model. This approach makes it possible to convert the wavefunction of the universe to a set of equations describing the time evolution of the universe. Following Ashtekar et.\ al., we make use of quantum canonical tra... |
gr-qc/0005011 | Ugo Moschella | A. Yu. Kamenshchik, U. Moschella, V. Pasquier | Chaplygin-like gas and branes in black hole bulks | 11 pages, 1 figure | Phys.Lett. B487 (2000) 7-13 | 10.1016/S0370-2693(00)00805-4 | null | gr-qc hep-th | null | We explore the possibility to locate a brane in black hole bulks. We study
explicitly the cases of BHTZ and Schwarzschild-anti de Sitter (AdS) black
holes. Our result is that in these cases branes cannot be supported by brane
tension alone and it is necessary to introduce other forms of matter on the
brane. We find c... | [
{
"created": "Wed, 3 May 2000 15:34:39 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Moschella",
"U.",
""
],
[
"Pasquier",
"V.",
""
]
] | We explore the possibility to locate a brane in black hole bulks. We study explicitly the cases of BHTZ and Schwarzschild-anti de Sitter (AdS) black holes. Our result is that in these cases branes cannot be supported by brane tension alone and it is necessary to introduce other forms of matter on the brane. We find cla... |
1506.08652 | Binaya Bishi Kumar | G.P.Singh, Binaya K. Bishi | Bianchi type-I Universe with Cosmological constant and quadratic
equation of state in f(R,T) modified gravity | 10 pages,5 figure ,regular article | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article deals with the study of Bianchi type-I universe in the context
of f(R,T) gravity. Einstein's field equations in f(R,T) gravity has been solved
in presence of cosmological constant ? and quadratic equation of state. Here we
have discussed two classes of f(R,T) gravity i.e. f(R,T) = R + 2f(T) and f(R,T)
= ... | [
{
"created": "Wed, 17 Jun 2015 04:37:11 GMT",
"version": "v1"
}
] | 2016-10-31 | [
[
"Singh",
"G. P.",
""
],
[
"Bishi",
"Binaya K.",
""
]
] | This article deals with the study of Bianchi type-I universe in the context of f(R,T) gravity. Einstein's field equations in f(R,T) gravity has been solved in presence of cosmological constant ? and quadratic equation of state. Here we have discussed two classes of f(R,T) gravity i.e. f(R,T) = R + 2f(T) and f(R,T) = f_... |
1112.5779 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel | On maximal globally hyperbolic vacuum space-times | various improvements | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove existence and uniqueness of maximal global hyperbolic developments
of vacuum general relativistic initial data sets with initial data (g,K) in
Sobolev spaces $H^s\oplus H^{s-1}$ with integer s > n/2 +1.
| [
{
"created": "Sun, 25 Dec 2011 13:35:16 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2013 05:23:28 GMT",
"version": "v2"
}
] | 2013-10-11 | [
[
"Chruściel",
"Piotr T.",
""
]
] | We prove existence and uniqueness of maximal global hyperbolic developments of vacuum general relativistic initial data sets with initial data (g,K) in Sobolev spaces $H^s\oplus H^{s-1}$ with integer s > n/2 +1. |
2206.14920 | Pedro Moraes | H. Shabani and P.H.R.S. Moraes | The galaxy rotation curves in the $f(R,T)$ modified gravity formalism | 9 pages, 4 figures | null | 10.1088/1402-4896/acd36d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astronomical data have shown that the galaxy rotation curves are mostly flat
in the far distance of the galactic cores, which reveals the insufficiency of
our knowledges about how gravity works in these regimes. In this paper we
introduce a resolution of this issue from the $f(R,T)$ modified gravity
formalism perspec... | [
{
"created": "Wed, 29 Jun 2022 21:26:24 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Shabani",
"H.",
""
],
[
"Moraes",
"P. H. R. S.",
""
]
] | Astronomical data have shown that the galaxy rotation curves are mostly flat in the far distance of the galactic cores, which reveals the insufficiency of our knowledges about how gravity works in these regimes. In this paper we introduce a resolution of this issue from the $f(R,T)$ modified gravity formalism perspecti... |
2007.12938 | Stephen D. H. Hsu | Stephen D.H. Hsu | Discrete Hilbert Space, the Born Rule, and Quantum Gravity | 10 pages, 1 figure | null | 10.1142/S0217732321500139 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravitational effects suggest a minimal length, or spacetime
interval, of order the Planck length. This in turn suggests that Hilbert space
itself may be discrete rather than continuous. One implication is that quantum
states with norm below some very small threshold do not exist. The exclusion of
what Everet... | [
{
"created": "Sat, 25 Jul 2020 14:13:04 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Hsu",
"Stephen D. H.",
""
]
] | Quantum gravitational effects suggest a minimal length, or spacetime interval, of order the Planck length. This in turn suggests that Hilbert space itself may be discrete rather than continuous. One implication is that quantum states with norm below some very small threshold do not exist. The exclusion of what Everett ... |
2102.13573 | George Pappas Dr | Kostas Glampedakis and George Pappas | Can supermassive black hole shadows test the Kerr metric? | 5 pages, 1 figure, accepted for publication as a Letter in Physical
Review D | Phys. Rev. D 104, L081503 (2021) | 10.1103/PhysRevD.104.L081503 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The unprecedented image of the M87* supermassive black hole has sparked some
controversy over its usefulness as a test of the general relativistic Kerr
metric. The criticism is mainly related to the black hole's quasi-circular
shadow and advocates that its radius depends not only on the black hole's true
spacetime pr... | [
{
"created": "Fri, 26 Feb 2021 16:31:32 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Oct 2021 14:34:43 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Oct 2021 10:28:48 GMT",
"version": "v3"
}
] | 2021-10-22 | [
[
"Glampedakis",
"Kostas",
""
],
[
"Pappas",
"George",
""
]
] | The unprecedented image of the M87* supermassive black hole has sparked some controversy over its usefulness as a test of the general relativistic Kerr metric. The criticism is mainly related to the black hole's quasi-circular shadow and advocates that its radius depends not only on the black hole's true spacetime prop... |
1008.2678 | Muhammad Sharif | M. Sharif and H. Rizwana Kausar | Effects of f(R) Dark Energy on Dissipative Anisotropic Collapsing Fluid | 16 pages, accepted for publication in Mod. Phys. Lett. A | Mod.Phys.Lett.A25:3299-3311,2010 | 10.1142/S0217732310034195 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to study the effects of dark energy on dynamics
of the collapsing fluid within the framework of metric f(R) gravity. The fluid
distribution is assumed to be locally anisotropic and undergoing dissipation in
the form of heat flow, null radiations and shear viscosity. For this purpose,
we t... | [
{
"created": "Fri, 13 Aug 2010 04:26:55 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"Sharif",
"M.",
""
],
[
"Kausar",
"H. Rizwana",
""
]
] | The purpose of this paper is to study the effects of dark energy on dynamics of the collapsing fluid within the framework of metric f(R) gravity. The fluid distribution is assumed to be locally anisotropic and undergoing dissipation in the form of heat flow, null radiations and shear viscosity. For this purpose, we tak... |
1411.2812 | Jakub Mielczarek Ph.D. | Jakub Mielczarek, Wlodzimierz Piechocki | Level spacing distribution for the prototype of the Bianchi IX model | Presented at the conference Random Matrix Theory: Foundations and
Applications, 1-6 July 2014, Cracow | null | 10.5506/APhysPolB.46.1729 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our results concern quantum chaos of the vacuum Bianchi IX model. We apply
the equilateral triangle potential well approximation to the potential of the
Bianchi IX model to solve the eigenvalue problem for the physical Hamiltonian.
Such approximation is well satisfied in vicinity of the cosmic singularity.
Level spac... | [
{
"created": "Tue, 11 Nov 2014 14:05:28 GMT",
"version": "v1"
}
] | 2015-10-28 | [
[
"Mielczarek",
"Jakub",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | Our results concern quantum chaos of the vacuum Bianchi IX model. We apply the equilateral triangle potential well approximation to the potential of the Bianchi IX model to solve the eigenvalue problem for the physical Hamiltonian. Such approximation is well satisfied in vicinity of the cosmic singularity. Level spacin... |
1607.06726 | Jaume Haro | Jaume de Haro, Jaume Amor\'os and Supriya Pan | Simple inflationary quintessential model II: Power law potentials | Version accepted for publication in PRD | Phys. Rev. D 94, 064060 (2016) | 10.1103/PhysRevD.94.064060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work is a sequel of our previous work Phys.Rev.D { 93}, 084018
(2016) [arXiv:1601.08175 [gr-qc]] cite{hap} which depicted a simple version of
an inflationary quintessential model whose inflationary stage was described by
a Higgs type potential and the quintessential phase was responsible due to an
exponen... | [
{
"created": "Fri, 22 Jul 2016 16:18:44 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2016 18:55:11 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"de Haro",
"Jaume",
""
],
[
"Amorós",
"Jaume",
""
],
[
"Pan",
"Supriya",
""
]
] | The present work is a sequel of our previous work Phys.Rev.D { 93}, 084018 (2016) [arXiv:1601.08175 [gr-qc]] cite{hap} which depicted a simple version of an inflationary quintessential model whose inflationary stage was described by a Higgs type potential and the quintessential phase was responsible due to an exponenti... |
1508.00532 | Michael Feldman | John D. Anderson, Gerald Schubert, Virginia Trimble and Michael R.
Feldman | Reply to comment by M. Pitkin on "Measurements of Newton's gravitational
constant and the length of day" | 2 pages, 3 figures, accepted for publication in EPL | EPL 111 (2015) 30003 | 10.1209/0295-5075/111/30003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We offer a response to recent claims that a constant $G$ measurement model
with an additional Gaussian noise term fits the experimental data better than a
model containing periodic terms.
| [
{
"created": "Thu, 30 Jul 2015 16:02:38 GMT",
"version": "v1"
}
] | 2015-08-19 | [
[
"Anderson",
"John D.",
""
],
[
"Schubert",
"Gerald",
""
],
[
"Trimble",
"Virginia",
""
],
[
"Feldman",
"Michael R.",
""
]
] | We offer a response to recent claims that a constant $G$ measurement model with an additional Gaussian noise term fits the experimental data better than a model containing periodic terms. |
gr-qc/0606109 | Shuang Wang | Shuang Wang | Thermodynamics of high dimensional Schwarzschild de Sitter spacetimes:
variable cosmological constant | 6 pages, revtex4 | null | null | null | gr-qc | null | We study the thermodynamic properties of high dimensional Schwarzschild de
Sitter spacetimes with the consideration of quantum effects. It is shown that
by considering the cosmological constant as a variable state parameter and
adding an extra term which denotes the vacuum energy, both the differential and
integral m... | [
{
"created": "Mon, 26 Jun 2006 03:35:22 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jun 2006 06:12:14 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Jul 2006 14:00:29 GMT",
"version": "v3"
},
{
"created": "Sun, 18 Mar 2007 15:42:27 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Wang",
"Shuang",
""
]
] | We study the thermodynamic properties of high dimensional Schwarzschild de Sitter spacetimes with the consideration of quantum effects. It is shown that by considering the cosmological constant as a variable state parameter and adding an extra term which denotes the vacuum energy, both the differential and integral mas... |
2312.02563 | Leo Brewin | Leo Brewin | A power series expansion of Teukolsky linearised gravitational waves | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A power series, suitable for use in a numerical relativity code, will be
presented for the time symmetric Teukolsky linearised gravitational waves.
| [
{
"created": "Tue, 5 Dec 2023 08:15:49 GMT",
"version": "v1"
}
] | 2023-12-06 | [
[
"Brewin",
"Leo",
""
]
] | A power series, suitable for use in a numerical relativity code, will be presented for the time symmetric Teukolsky linearised gravitational waves. |
1407.2428 | Parampreet Singh | Anton Joe, Parampreet Singh | Kantowski-Sachs spacetime in loop quantum cosmology: bounds on expansion
and shear scalars and the viability of quantization | Revised to match the published version in CQG. Discussion expanded
and references added | Class. Quant. Grav. 32 (2015) 015009 | 10.1088/0264-9381/32/1/015009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using effective dynamics, we investigate the behavior of expansion and shear
scalars in different proposed quantizations of the Kantowski-Sachs spacetime
with matter in loop quantum cosmology. We find that out of the various proposed
choices, there is only one known prescription which leads to the generic
bounded beh... | [
{
"created": "Wed, 9 Jul 2014 10:41:55 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jan 2015 15:47:23 GMT",
"version": "v2"
}
] | 2015-01-08 | [
[
"Joe",
"Anton",
""
],
[
"Singh",
"Parampreet",
""
]
] | Using effective dynamics, we investigate the behavior of expansion and shear scalars in different proposed quantizations of the Kantowski-Sachs spacetime with matter in loop quantum cosmology. We find that out of the various proposed choices, there is only one known prescription which leads to the generic bounded behav... |
gr-qc/0609032 | Hanno Sahlmann | Hanno Sahlmann | Exploring the diffeomorphism invariant Hilbert space of a scalar field | 20 pages, no figures; v3: corrected typos, added reference, some
clarifications added; version as published in CQG | Class.Quant.Grav.24:4601-4616,2007 | 10.1088/0264-9381/24/18/003 | ITP-UU-06/35, SPIN-06/31 | gr-qc hep-th math-ph math.MP | null | As a toy model for the implementation of the diffeomorphism constraint, the
interpretation of the resulting states, and the treatment of ordering
ambiguities in loop quantum gravity, we consider the Hilbert space of spatially
diffeomorphism invariant states for a scalar field. We give a very explicit
formula for the ... | [
{
"created": "Fri, 8 Sep 2006 10:17:35 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Apr 2007 18:25:07 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Aug 2007 07:52:00 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Sahlmann",
"Hanno",
""
]
] | As a toy model for the implementation of the diffeomorphism constraint, the interpretation of the resulting states, and the treatment of ordering ambiguities in loop quantum gravity, we consider the Hilbert space of spatially diffeomorphism invariant states for a scalar field. We give a very explicit formula for the sc... |
gr-qc/9709076 | Andrea Barbieri | A. Barbieri | Space of the vertices of relativistic spin networks | 3 pages, LaTeX, previous results clarified, new statements made | null | null | IFUP-TH/47-97 | gr-qc | null | The general solutin to the constraints that define relativistic spin networks
vertices is given and their relations with 3-dimensional quantum tetrahedra is
dicussed. An alternative way to handle the constraints is also presented.
| [
{
"created": "Tue, 30 Sep 1997 00:49:07 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 1997 12:20:12 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Oct 1997 11:53:07 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Barbieri",
"A.",
""
]
] | The general solutin to the constraints that define relativistic spin networks vertices is given and their relations with 3-dimensional quantum tetrahedra is dicussed. An alternative way to handle the constraints is also presented. |
2012.06114 | Hong Wang | Hong Wang and Jin Wang | Quantum geometrical current and coherence of the open gravitation
system: loop quantum gravity coupled with a thermal scalar field | 55 pages,6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Open quantum systems interacting with the environments often show interesting
behaviors, such as decoherence, non-unitary evolution, dissipation, etc. It is
interesting but still challenging to study the open quantum gravitation system
interacting with the environments. In this work, we develop a general
parameterize... | [
{
"created": "Fri, 11 Dec 2020 04:15:04 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jul 2021 00:58:01 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Apr 2022 02:57:31 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Feb 2023 01:21:13 GMT",
"version": "v4"
}
] | 2023-02-02 | [
[
"Wang",
"Hong",
""
],
[
"Wang",
"Jin",
""
]
] | Open quantum systems interacting with the environments often show interesting behaviors, such as decoherence, non-unitary evolution, dissipation, etc. It is interesting but still challenging to study the open quantum gravitation system interacting with the environments. In this work, we develop a general parameterized ... |
gr-qc/9906077 | Andrei Kirilyuk | Andrei P. Kirilyuk | Universal gravitation as a complex-dynamical process, renormalised
Planckian units, and the spectrum of elementary particles | 71 pages; 15 pages of the necessary minimum (1-8,48-56); PostScript
3.0; a part of the author's book "Universal Concept of Complexity by the
Dynamic Redundance Paradigm: Causal Randomness, Complete Wave Mechanics, and
the Ultimate Unification of Knowledge" (Kiev, Naukova Dumka, 1997; 550 p., in
English), see ph... | null | null | null | gr-qc hep-ph | null | The new, complex-dynamical mechanism of the universal gravitation naturally
incorporating dynamical quantization, wave-particle duality, and relativity of
physically emerging space and time (quant-ph/9902015,16) provides the realistic
meaning and fundamentally substantiated modification of the Planckian units of
mass... | [
{
"created": "Thu, 17 Jun 1999 15:50:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kirilyuk",
"Andrei P.",
""
]
] | The new, complex-dynamical mechanism of the universal gravitation naturally incorporating dynamical quantization, wave-particle duality, and relativity of physically emerging space and time (quant-ph/9902015,16) provides the realistic meaning and fundamentally substantiated modification of the Planckian units of mass, ... |
1311.3946 | Rafael Ferraro | Rafael Ferraro | Untangling the Newman-Janis algorithm | 11 pages. Minor changes. Published version | Gen. Relativ. Gravit. 46(2014), 1705 (1-15) | 10.1007/s10714-014-1705-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Newman-Janis algorithm for Kerr-Newman geometry is reanalyzed in the light of
Cartan calculus.
| [
{
"created": "Fri, 15 Nov 2013 18:44:13 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Apr 2014 19:46:03 GMT",
"version": "v2"
}
] | 2014-04-09 | [
[
"Ferraro",
"Rafael",
""
]
] | Newman-Janis algorithm for Kerr-Newman geometry is reanalyzed in the light of Cartan calculus. |
gr-qc/0205027 | Osvaldo M. Moreschi | Osvaldo Moreschi, Alejandro Perez and Luis Lehner | Energy and angular momentum radiated for non head-on binary black hole
collisions | 9 pages, 2 figures | Phys.Rev. D66 (2002) 104017 | 10.1103/PhysRevD.66.104017 | null | gr-qc | null | We investigate the possible total radiated energy produced by a binary black
hole system containing non-vanishing total angular momentum. For the scenearios
considered we find that the total radiated energy does not exceed 1%.
Additionally we explore the gravitational radiation field and the variation of
angular mome... | [
{
"created": "Tue, 7 May 2002 18:06:16 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2002 18:14:20 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Moreschi",
"Osvaldo",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Lehner",
"Luis",
""
]
] | We investigate the possible total radiated energy produced by a binary black hole system containing non-vanishing total angular momentum. For the scenearios considered we find that the total radiated energy does not exceed 1%. Additionally we explore the gravitational radiation field and the variation of angular moment... |
1607.03384 | Antonio Pasqua Dr. | Antonio Pasqua, Surajit Chattopadhyay and Aroonkumar Beesham | A look into the cosmological consequences of a dark energy model with
higher derivatives of $H$ in the framework of Chameleon Brans-Dicke Cosmology | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study some relevant cosmological features of a Dark Energy
(DE) model with Granda-Oliveiros cut-off, which is just a specific case of
Nojiri-Odintsov holographic DE unifying phantom inflation with late-time
acceleration, in the framework of Chameleon Brans-Dicke (BD) Cosmology.
Choosing a particular... | [
{
"created": "Mon, 11 Jul 2016 07:45:31 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jan 2019 21:01:46 GMT",
"version": "v2"
}
] | 2019-01-23 | [
[
"Pasqua",
"Antonio",
""
],
[
"Chattopadhyay",
"Surajit",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | In this paper, we study some relevant cosmological features of a Dark Energy (DE) model with Granda-Oliveiros cut-off, which is just a specific case of Nojiri-Odintsov holographic DE unifying phantom inflation with late-time acceleration, in the framework of Chameleon Brans-Dicke (BD) Cosmology. Choosing a particular a... |
2304.07736 | Betti Hartmann | Yves Brihaye (Universite de Mons, Belgium) and Betti Hartmann
(University College London, UK) | Charged and rotating boson stars in 5-dimensional
Einstein-Maxwell(-Chern-Simons) theory | 11 pages including 8 figures | null | 10.1103/PhysRevD.107.124060 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study charged and rotating boson stars in 5-dimensional
Einstein-Maxwell(-Chern-Simons) theory assuming the two angular momenta
associated to the two orthogonal planes of rotation to be equal. Next to the
angular momenta, the boson stars carry electric charge and magnetic moment.
Interestingly, we find new branche... | [
{
"created": "Sun, 16 Apr 2023 09:39:20 GMT",
"version": "v1"
}
] | 2023-07-12 | [
[
"Brihaye",
"Yves",
"",
"Universite de Mons, Belgium"
],
[
"Hartmann",
"Betti",
"",
"University College London, UK"
]
] | We study charged and rotating boson stars in 5-dimensional Einstein-Maxwell(-Chern-Simons) theory assuming the two angular momenta associated to the two orthogonal planes of rotation to be equal. Next to the angular momenta, the boson stars carry electric charge and magnetic moment. Interestingly, we find new branches ... |
1309.6384 | Muhammad Sharif | M. Sharif and Wajiha Javed | Fermions Tunneling from Plebanski-Demianski Black Holes | 22 pages, 6 figures | Gen. Relativ. Gravit 45(2013)1051-1068 | 10.1007/s10714-013-1512-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation spectrum via fermions tunneling is investigated through
horizon radii of Pleba$\acute{\textmd{n}}$ski-Demia$\acute{\textmd{n}}$ski
family of black holes. To this end, we determine the tunneling probabilities
for outgoing and incoming charged fermion particles and obtain their
corresponding Hawking t... | [
{
"created": "Wed, 25 Sep 2013 02:40:28 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Sharif",
"M.",
""
],
[
"Javed",
"Wajiha",
""
]
] | Hawking radiation spectrum via fermions tunneling is investigated through horizon radii of Pleba$\acute{\textmd{n}}$ski-Demia$\acute{\textmd{n}}$ski family of black holes. To this end, we determine the tunneling probabilities for outgoing and incoming charged fermion particles and obtain their corresponding Hawking tem... |
1206.0028 | Robert Reasenberg | Robert D. Reasenberg, Biju R. Patla, James D. Phillips, and Rajesh
Thapa | Design and characteristics of a WEP test in a sounding-rocket payload | 20 pages, 5 figures (color) | null | 10.1088/0264-9381/29/18/184013 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/publicdomain/ | We describe SR-POEM, a Galilean test of the weak equivalence principle that
is to be conducted during the free fall portion of the flight of a sounding
rocket payload. This test of a single pair of substances will have a
measurement uncertainty of {\sigma}({\eta}) < 2 10^17 after averaging the
results of eight separa... | [
{
"created": "Thu, 31 May 2012 20:37:34 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Reasenberg",
"Robert D.",
""
],
[
"Patla",
"Biju R.",
""
],
[
"Phillips",
"James D.",
""
],
[
"Thapa",
"Rajesh",
""
]
] | We describe SR-POEM, a Galilean test of the weak equivalence principle that is to be conducted during the free fall portion of the flight of a sounding rocket payload. This test of a single pair of substances will have a measurement uncertainty of {\sigma}({\eta}) < 2 10^17 after averaging the results of eight separate... |
2312.16849 | Vyacheslav Dokuchaev | Vyacheslav Ivanovich Dokuchaev | Quantum correction to black hole accretion | 5 pages, 3 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe quantum correction to the accreting hot plasma onto black holes.
This quantum correction is related with the Hawking radiation, which heats the
accreting plasma. The hot accreting gas is heated additionally by the quantum
Hawking radiation. It is demonstrated that Hawking radiation prevails over the
Compt... | [
{
"created": "Thu, 28 Dec 2023 06:35:24 GMT",
"version": "v1"
}
] | 2024-01-01 | [
[
"Dokuchaev",
"Vyacheslav Ivanovich",
""
]
] | We describe quantum correction to the accreting hot plasma onto black holes. This quantum correction is related with the Hawking radiation, which heats the accreting plasma. The hot accreting gas is heated additionally by the quantum Hawking radiation. It is demonstrated that Hawking radiation prevails over the Compton... |
1306.1883 | Mohammad Nouri-Zonoz | M. Nouri-Zonoz and A. Parvizi | Gaussian Curvature and Global effects : gravitational Aharonov-Bohm
effect revisited | 14 pages,2 figures, RevTex | Phys. Rev. D. 88, 023004 (2013) | 10.1103/PhysRevD.88.023004 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Gauss-Bonnet formula, integral of the Gaussian curvature over a
2-surface enclosed by a curve in the asymptotically flat region of a static
spacetime was found to be a measure of a gravitational analogue of
Aharonov-Bohm effect by Ford and Vilenkin in the linearized regime. Employing
the 1+3 formulation of ... | [
{
"created": "Sat, 8 Jun 2013 05:14:12 GMT",
"version": "v1"
}
] | 2013-07-26 | [
[
"Nouri-Zonoz",
"M.",
""
],
[
"Parvizi",
"A.",
""
]
] | Using the Gauss-Bonnet formula, integral of the Gaussian curvature over a 2-surface enclosed by a curve in the asymptotically flat region of a static spacetime was found to be a measure of a gravitational analogue of Aharonov-Bohm effect by Ford and Vilenkin in the linearized regime. Employing the 1+3 formulation of sp... |
gr-qc/0609011 | Stefan Nobbenhuis | Stefan Nobbenhuis | The Cosmological Constant Problem, an Inspiration for New Physics | Ph.D. Thesis | null | null | ITP-UU-06/36, SPIN-06/30 | gr-qc | null | We have critically compared different approaches to the cosmological constant
problem, which is at the edge of elementary particle physics and cosmology.
This problem is deeply connected with the difficulties formulating a theory of
quantum gravity. After the 1998 discovery that our universe's expansion is
accelerati... | [
{
"created": "Mon, 4 Sep 2006 17:30:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nobbenhuis",
"Stefan",
""
]
] | We have critically compared different approaches to the cosmological constant problem, which is at the edge of elementary particle physics and cosmology. This problem is deeply connected with the difficulties formulating a theory of quantum gravity. After the 1998 discovery that our universe's expansion is accelerating... |
gr-qc/9812069 | Ruth Lazkoz | Ruth Lazkoz | G1 Cosmologies with Gravitational and Scalar Waves | 24 pages, 2 figures | Phys. Rev. D 60, 104008 (1999) | 10.1103/PhysRevD.60.104008 | null | gr-qc | null | I present here a new algorithm to generate families of inhomogeneous massless
scalar field cosmologies. New spacetimes, having a single isometry, are
generated by breaking the homogeneity of massless scalar field $G_2$ models
along one direction. As an illustration of the technique I construct
cosmological models whi... | [
{
"created": "Fri, 18 Dec 1998 15:56:20 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Lazkoz",
"Ruth",
""
]
] | I present here a new algorithm to generate families of inhomogeneous massless scalar field cosmologies. New spacetimes, having a single isometry, are generated by breaking the homogeneity of massless scalar field $G_2$ models along one direction. As an illustration of the technique I construct cosmological models which... |
gr-qc/0412095 | Christian Schubert | Fiorenzo Bastianelli (Bologna University) and Christian Schubert
(UTPA) | One loop photon-graviton mixing in an electromagnetic field: Part 1 | 27 pages, final published version (minor corrections) | JHEP 0502 (2005) 069 | 10.1088/1126-6708/2005/02/069 | AEI-2004-047 | gr-qc hep-th | null | Photon-graviton mixing in an electromagnetic field is a process of potential
interest for cosmology and astrophysics. At the tree level it has been studied
by many authors. We consider the one-loop contribution to this amplitude
involving a charged spin 0 or spin 1/2 particle in the loop and an arbitrary
constant fie... | [
{
"created": "Mon, 20 Dec 2004 08:50:47 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Mar 2005 22:39:41 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Bastianelli",
"Fiorenzo",
"",
"Bologna University"
],
[
"Schubert",
"Christian",
"",
"UTPA"
]
] | Photon-graviton mixing in an electromagnetic field is a process of potential interest for cosmology and astrophysics. At the tree level it has been studied by many authors. We consider the one-loop contribution to this amplitude involving a charged spin 0 or spin 1/2 particle in the loop and an arbitrary constant field... |
1503.01011 | Behzad Eslam Panah | S. H. Hendi, G. H. Bordbar, B. Eslam Panah and M. Najafi | Dilatonic Equation of Hydrostatic Equilibrium and Neutron Star Structure | 10 pages with 4 figures, Numerical analysis added | Astrophys Space Sci. 358, 30 (2015) | 10.1007/s10509-015-2429-x | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a new hydrostatic equilibrium equation related to
dilaton gravity. We consider a spherical symmetric metric to obtain the
hydrostatic equilibrium equation of stars in $4$-dimensions, and generalize TOV
equation to the case of regarding a dilaton field. Then, we calculate the
structure proper... | [
{
"created": "Tue, 3 Mar 2015 16:58:57 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jun 2015 08:12:52 GMT",
"version": "v2"
}
] | 2015-07-27 | [
[
"Hendi",
"S. H.",
""
],
[
"Bordbar",
"G. H.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Najafi",
"M.",
""
]
] | In this paper, we present a new hydrostatic equilibrium equation related to dilaton gravity. We consider a spherical symmetric metric to obtain the hydrostatic equilibrium equation of stars in $4$-dimensions, and generalize TOV equation to the case of regarding a dilaton field. Then, we calculate the structure properti... |
gr-qc/0310127 | Lars Andersson | Lars Andersson (University of Miami), Henk van Elst (Queen Mary,
University of London), Claes Uggla (University of Karlstad) | Gowdy phenomenology in scale-invariant variables | 33 pages, 17 figures. To appear in A Spacetime Safari: Papers in
Honour of Vincent Moncrief | Class.Quant.Grav. 21 (2004) S29-S57 | 10.1088/0264-9381/21/3/003 | null | gr-qc | null | The dynamics of Gowdy vacuum spacetimes is considered in terms of
Hubble-normalized scale-invariant variables, using the timelike area temporal
gauge. The resulting state space formulation provides for a simple mechanism
for the formation of ``false'' and ``true spikes'' in the approach to the
singularity, and a geom... | [
{
"created": "Thu, 30 Oct 2003 16:06:48 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Andersson",
"Lars",
"",
"University of Miami"
],
[
"van Elst",
"Henk",
"",
"Queen Mary,\n University of London"
],
[
"Uggla",
"Claes",
"",
"University of Karlstad"
]
] | The dynamics of Gowdy vacuum spacetimes is considered in terms of Hubble-normalized scale-invariant variables, using the timelike area temporal gauge. The resulting state space formulation provides for a simple mechanism for the formation of ``false'' and ``true spikes'' in the approach to the singularity, and a geomet... |
2202.02122 | Cosimo Bambi | Temurbek Mirzaev, Askar B. Abdikamalov, Ahmadjon A. Abdujabbarov,
Dimitry Ayzenberg, Bobomurat Ahmedov, Cosimo Bambi | Observational appearance of Kaluza-Klein black holes | 13 pages, 9 figures. v2: refereed version | Eur. Phys. J. C (2023) 83:800 | 10.1140/epjc/s10052-023-11985-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The optical properties of rotating black holes in Kaluza-Klein theory
described by the total mass, spin, and electric and magnetic charges are
investigated in detail. Using a developed general relativistic ray-tracing code
to calculate the motion of photons, the numerous shadows of Kaluza-Klein black
holes are genera... | [
{
"created": "Fri, 4 Feb 2022 13:18:49 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Sep 2023 14:19:13 GMT",
"version": "v2"
}
] | 2023-09-12 | [
[
"Mirzaev",
"Temurbek",
""
],
[
"Abdikamalov",
"Askar B.",
""
],
[
"Abdujabbarov",
"Ahmadjon A.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Bambi",
"Cosimo",
""
]
] | The optical properties of rotating black holes in Kaluza-Klein theory described by the total mass, spin, and electric and magnetic charges are investigated in detail. Using a developed general relativistic ray-tracing code to calculate the motion of photons, the numerous shadows of Kaluza-Klein black holes are generate... |
gr-qc/9305020 | Steven Carlip | S. Carlip | Six ways to quantize (2+1)-dimensional gravity | 21 pages, U.C. Davis preprint UCD-93-15 and Santa Barbara ITP
preprint NSF-ITP-93-63 | null | null | null | gr-qc hep-th | null | We do not yet know how to quantize gravity in 3+1 dimensions, but in lower
dimensions we face the opposite problem: many of the approaches originally
developed for (3+1)-dimensional gravity can be successfully implemented in 2+1
dimensions, but the resulting quantum theories are not all equivalent. In this
talk, I di... | [
{
"created": "Mon, 24 May 1993 20:07:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Carlip",
"S.",
""
]
] | We do not yet know how to quantize gravity in 3+1 dimensions, but in lower dimensions we face the opposite problem: many of the approaches originally developed for (3+1)-dimensional gravity can be successfully implemented in 2+1 dimensions, but the resulting quantum theories are not all equivalent. In this talk, I disc... |
1906.11063 | Mohsen Dehghani | M. Dehghani and M.R. Setare | Dilaton black holes with power law electrodynamics | 21 pages with 9 captioned figures | Phys. Rev. D 100, 044022 (2019) | 10.1103/PhysRevD.100.044022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, the new black hole solutions to the
Einstein-power-Maxwell-dilaton gravity theory have been investigated in a
four-dimensional space-time. The coupled scalar, electromagnetic and
gravitational field equations have been solved in a static and spherically
symmetric geometry. It has been shown that dila... | [
{
"created": "Mon, 24 Jun 2019 18:56:11 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Jun 2019 06:00:55 GMT",
"version": "v2"
}
] | 2019-08-13 | [
[
"Dehghani",
"M.",
""
],
[
"Setare",
"M. R.",
""
]
] | In this article, the new black hole solutions to the Einstein-power-Maxwell-dilaton gravity theory have been investigated in a four-dimensional space-time. The coupled scalar, electromagnetic and gravitational field equations have been solved in a static and spherically symmetric geometry. It has been shown that dilato... |
gr-qc/0305087 | Tirthabir Biswas | Tirthabir Biswas | Quintessential Transition of the Internal Manifold | addition of a reference, minor editorial changes | null | null | YITP-SB-03-18 | gr-qc hep-th | null | In this paper, I study the dynamics of the Kaluza-Klein internal manifold
using its ``shape'' and the ``size'' as collective coordinates. The essential
motivation is to be able to explain symmetry breaking in gauge theories through
a transition of the internal manifold from a symmetrical metric space to a less
symmet... | [
{
"created": "Thu, 22 May 2003 16:03:38 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 2003 21:05:10 GMT",
"version": "v2"
}
] | 2018-01-23 | [
[
"Biswas",
"Tirthabir",
""
]
] | In this paper, I study the dynamics of the Kaluza-Klein internal manifold using its ``shape'' and the ``size'' as collective coordinates. The essential motivation is to be able to explain symmetry breaking in gauge theories through a transition of the internal manifold from a symmetrical metric space to a less symmetri... |
gr-qc/0303036 | G. Bergqvist | G. Bergqvist, I. Eriksson and J. M. M. Senovilla | New electromagnetic conservation laws | 6 pages | Class.Quant.Grav. 20 (2003) 2663-2668 | 10.1088/0264-9381/20/13/313 | null | gr-qc | null | The Chevreton superenergy tensor was introduced in 1964 as a counterpart, for
electromagnetic fields, of the well-known Bel-Robinson tensor of the
gravitational field. We here prove the unnoticed facts that, in the absence of
electromagnetic currents, Chevreton's tensor (i) is completely symmetric, and
(ii) has a tra... | [
{
"created": "Mon, 10 Mar 2003 09:37:51 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bergqvist",
"G.",
""
],
[
"Eriksson",
"I.",
""
],
[
"Senovilla",
"J. M. M.",
""
]
] | The Chevreton superenergy tensor was introduced in 1964 as a counterpart, for electromagnetic fields, of the well-known Bel-Robinson tensor of the gravitational field. We here prove the unnoticed facts that, in the absence of electromagnetic currents, Chevreton's tensor (i) is completely symmetric, and (ii) has a trace... |
2010.07202 | Che-Yu Chen | Che-Yu Chen, Yu-Hsien Kung, Pisin Chen | Black Hole Perturbations and Quasinormal Modes in Hybrid Metric-Palatini
Gravity | 11 pages, 2 figures. Updated to match the published version | Phys. Rev. D 102, 124033 (2020) | 10.1103/PhysRevD.102.124033 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The rapid advancement of gravitational wave astronomy in recent years has
paved the way for the burgeoning development of black hole spectroscopy, which
enhances the possibility of testing black holes by their quasinormal modes
(QNMs). In this paper, the axial gravitational perturbations and the QNM
frequencies of bl... | [
{
"created": "Wed, 14 Oct 2020 16:14:24 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Dec 2020 05:32:22 GMT",
"version": "v2"
}
] | 2020-12-16 | [
[
"Chen",
"Che-Yu",
""
],
[
"Kung",
"Yu-Hsien",
""
],
[
"Chen",
"Pisin",
""
]
] | The rapid advancement of gravitational wave astronomy in recent years has paved the way for the burgeoning development of black hole spectroscopy, which enhances the possibility of testing black holes by their quasinormal modes (QNMs). In this paper, the axial gravitational perturbations and the QNM frequencies of blac... |
1602.06903 | Nicola Tamanini | Nicola Tamanini and Matthew Wright | Cosmological dynamics of extended chameleons | JCAP style, 31 pages, 6 figures, 8 tables; v2: acknowledgements added | null | 10.1088/1475-7516/2016/04/032 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological dynamics of the recently proposed extended
chameleon models at both background and linear perturbation levels. Dynamical
systems techniques are employed to fully characterize the evolution of the
universe at the largest distances, while structure formation is analysed at
sub-horizon sc... | [
{
"created": "Mon, 22 Feb 2016 19:40:23 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Mar 2017 15:09:17 GMT",
"version": "v2"
}
] | 2017-03-09 | [
[
"Tamanini",
"Nicola",
""
],
[
"Wright",
"Matthew",
""
]
] | We investigate the cosmological dynamics of the recently proposed extended chameleon models at both background and linear perturbation levels. Dynamical systems techniques are employed to fully characterize the evolution of the universe at the largest distances, while structure formation is analysed at sub-horizon scal... |
0801.1119 | Alejandro Corichi | Alejandro Corichi | On the geometry of quantum constrained systems | 14 pages, no figures. Discussion expanded. Version published in CQG | Class.Quant.Grav.25:135013,2008 | 10.1088/0264-9381/25/13/135013 | IGPG-08/1-1 | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The use of geometric methods has proved useful in the hamiltonian description
of classical constrained systems. In this note we provide the first steps
toward the description of the geometry of quantum constrained systems. We make
use of the geometric formulation of quantum theory in which unitary
transformations (in... | [
{
"created": "Tue, 8 Jan 2008 16:44:38 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jun 2008 17:48:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
]
] | The use of geometric methods has proved useful in the hamiltonian description of classical constrained systems. In this note we provide the first steps toward the description of the geometry of quantum constrained systems. We make use of the geometric formulation of quantum theory in which unitary transformations (incl... |
2011.07763 | Wei-Hsiang Shao | Wei-Hsiang Shao, Che-Yu Chen, and Pisin Chen | Generating Rotating Spacetime in Ricci-Based Gravity: Naked Singularity
as a Black Hole Mimicker | 33 pages, 4 figures; reference added, updated to match the published
version | JCAP 03 (2021) 041 | 10.1088/1475-7516/2021/03/041 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the lack of rotating solutions sourced by matter in General
Relativity as well as in modified gravity theories, we extend a recently
discovered exact rotating solution of the minimal Einstein-scalar theory to its
counterpart in Eddington-inspired Born-Infeld gravity coupled to a Born-Infeld
scalar field.... | [
{
"created": "Mon, 16 Nov 2020 07:49:13 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 07:52:19 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Shao",
"Wei-Hsiang",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | Motivated by the lack of rotating solutions sourced by matter in General Relativity as well as in modified gravity theories, we extend a recently discovered exact rotating solution of the minimal Einstein-scalar theory to its counterpart in Eddington-inspired Born-Infeld gravity coupled to a Born-Infeld scalar field. T... |
2302.06362 | Baocheng Zhang | Feifan He and Baocheng Zhang | Generation of entanglement between two laser pulses through
gravitational interaction | null | Eur. Phys. J. Plus (2023) 138:141 | 10.1140/epjp/s13360-023-03766-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate entanglement generation between two pulses through the
gravitational interaction in the framework of linearized quantum gravity.
Different from the earlier suggestions that two massive particles can be
entangled through the gravitational field produced by the particles themselves,
we use the massless p... | [
{
"created": "Mon, 13 Feb 2023 13:48:54 GMT",
"version": "v1"
}
] | 2023-02-14 | [
[
"He",
"Feifan",
""
],
[
"Zhang",
"Baocheng",
""
]
] | We investigate entanglement generation between two pulses through the gravitational interaction in the framework of linearized quantum gravity. Different from the earlier suggestions that two massive particles can be entangled through the gravitational field produced by the particles themselves, we use the massless par... |
1503.01507 | Edward Anderson | Edward Anderson | Configuration Spaces in Fundamental Physics | 35 pages including 16 Figures. Several new figures and Appendices
added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I consider configuration spaces for $N$-body problems, gauge theories and for
GR in both geometrodynamical and Ashtekar variables forms, including
minisuperspace and inhomogeneous perturbations thereabout in the former case.
These examples include many interesting spaces of shapes (with and without
whichever of local... | [
{
"created": "Thu, 5 Mar 2015 01:24:51 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2015 21:17:03 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Apr 2016 19:00:58 GMT",
"version": "v3"
}
] | 2016-04-20 | [
[
"Anderson",
"Edward",
""
]
] | I consider configuration spaces for $N$-body problems, gauge theories and for GR in both geometrodynamical and Ashtekar variables forms, including minisuperspace and inhomogeneous perturbations thereabout in the former case. These examples include many interesting spaces of shapes (with and without whichever of local o... |
1408.1798 | Andronikos Paliathanasis | Andronikos Paliathanasis and Michael Tsamparlis | Two scalar field cosmology: Conservation laws and exact solutions | 17 pages, to be published in Phys. Rev. D | Phys. Rev. D 90, 043529 (2014) | 10.1103/PhysRevD.90.043529 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the two scalar field cosmology in a FRW spatially flat spacetime
where the scalar fields interact both in the kinetic part and the potential. We
apply the Noether point symmetries in order to define the interaction of the
scalar fields. We use the point symmetries in order to write the field
equations in ... | [
{
"created": "Fri, 8 Aug 2014 09:43:15 GMT",
"version": "v1"
}
] | 2014-09-09 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Tsamparlis",
"Michael",
""
]
] | We consider the two scalar field cosmology in a FRW spatially flat spacetime where the scalar fields interact both in the kinetic part and the potential. We apply the Noether point symmetries in order to define the interaction of the scalar fields. We use the point symmetries in order to write the field equations in th... |
1410.3023 | Massimo Tinto | Massimo Tinto, Jose C. N. de Araujo, Helio K. Kuga, Marcio E. S.
Alves, Odylio D. Aguiar | Orbit analysis of a geostationary gravitational wave interferometer
detector array | In This article we analyze the trajectories of three geostationary
satellites forming a gravitational wave interferometer. The article is 16
pages long and contains 5 figures | null | 10.1088/0264-9381/32/18/185017 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the trajectories of three geostationary satellites forming the
GEOstationary GRAvitational Wave Interferometer (GEOGRAWI)~\cite{tinto}, a
space-based laser interferometer mission aiming to detect and study
gravitational radiation in the ($10^{-4} - 10$) Hz band.
The combined effects of the gravity fields... | [
{
"created": "Sat, 11 Oct 2014 19:32:27 GMT",
"version": "v1"
}
] | 2015-09-23 | [
[
"Tinto",
"Massimo",
""
],
[
"de Araujo",
"Jose C. N.",
""
],
[
"Kuga",
"Helio K.",
""
],
[
"Alves",
"Marcio E. S.",
""
],
[
"Aguiar",
"Odylio D.",
""
]
] | We analyze the trajectories of three geostationary satellites forming the GEOstationary GRAvitational Wave Interferometer (GEOGRAWI)~\cite{tinto}, a space-based laser interferometer mission aiming to detect and study gravitational radiation in the ($10^{-4} - 10$) Hz band. The combined effects of the gravity fields of ... |
1911.04949 | Plamen Fiziev | Plamen P. Fiziev | The Era of Gravitational Astronomy and Gravitational Field of
Non-Rotating Single Point Particle in General Relativity | 35 pages, 1 figure, corrections with respect to journal publication
in some formulas in Section IV are made. arXiv admin note: substantial text
overlap with arXiv:gr-qc/0306088 | Physycs or Particles and Nuclei, Vol. 50 (6), pp. 944-972 (2019) | null | SU-2019 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Utilizing various gauges of the radial coordinate, we give a General
Relativistic (GR) description of static spherically symmetric spacetimes with a
massive point source and vacuum outside this singularity. We show that in GR
there exists a two-parameter family of such solutions to the Einstein equations
which are ph... | [
{
"created": "Mon, 11 Nov 2019 07:59:40 GMT",
"version": "v1"
}
] | 2019-11-13 | [
[
"Fiziev",
"Plamen P.",
""
]
] | Utilizing various gauges of the radial coordinate, we give a General Relativistic (GR) description of static spherically symmetric spacetimes with a massive point source and vacuum outside this singularity. We show that in GR there exists a two-parameter family of such solutions to the Einstein equations which are phys... |
2111.07835 | Claus Kiefer | Claus Kiefer and Tatevik Vardanyan | Power spectrum for perturbations in an inflationary model for a closed
universe | 20 pages, 1 figure, Invited contribution to a Topical Collection in
memory of Prof. T. Padmanabhan, final version | General Relativity and Gravitation 54, article number: 30 (2022) | 10.1007/s10714-022-02918-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the power spectrum of primordial quantum fluctuations in an
inflationary universe for curvature parameter ${\mathcal K}=1$. This is
achieved through a Born--Oppenheimer type of approximation scheme from the
Wheeler--DeWitt equation of canonical quantum gravity using gauge-invariant
variables. Compared to th... | [
{
"created": "Mon, 15 Nov 2021 15:22:58 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Apr 2022 07:33:02 GMT",
"version": "v2"
}
] | 2022-04-05 | [
[
"Kiefer",
"Claus",
""
],
[
"Vardanyan",
"Tatevik",
""
]
] | We derive the power spectrum of primordial quantum fluctuations in an inflationary universe for curvature parameter ${\mathcal K}=1$. This is achieved through a Born--Oppenheimer type of approximation scheme from the Wheeler--DeWitt equation of canonical quantum gravity using gauge-invariant variables. Compared to the ... |
1909.04995 | Wei-Tou Ni | Wei-Tou Ni, Gang Wang and An-Ming Wu | Astrodynamical middle-frequency interferometric gravitational wave
observatory AMIGO: Mission concept and orbit design | 29 pages, 21 figures, 6 tables. arXiv admin note: text overlap with
arXiv:1709.05659 | International Journal of Modern Physics D 29 (2020) 1940007 (32
pages) | 10.1142/S0218271819400078 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | AMIGO is a first-generation Astrodynamical Middle-frequency Interferometric
GW Observatory. The scientific goals of AMIGO are: to bridge the spectra gap
between first-generation high-frequency and low-frequency GW sensitivities; to
detect intermediate mass BH coalescence; to detect inspiral phase and predict
time of ... | [
{
"created": "Wed, 11 Sep 2019 12:12:57 GMT",
"version": "v1"
}
] | 2020-07-14 | [
[
"Ni",
"Wei-Tou",
""
],
[
"Wang",
"Gang",
""
],
[
"Wu",
"An-Ming",
""
]
] | AMIGO is a first-generation Astrodynamical Middle-frequency Interferometric GW Observatory. The scientific goals of AMIGO are: to bridge the spectra gap between first-generation high-frequency and low-frequency GW sensitivities; to detect intermediate mass BH coalescence; to detect inspiral phase and predict time of bi... |
0712.2359 | Katarzyna Ostasiewicz | A. Radosz, A. T. Augousti, K. Ostasiewicz | Decoupling of kinematical time dilation and gravitational time dilation
in particular geometries | 4 pages | ActaPhys.Polon.B39:1357-1362,2008 | null | null | gr-qc | null | Two different forms of time dilation, namely, the kinematical time dilation
of special relativity and gravitational red shift are coupled during
observations of systems moving through a gravitational field. In the particular
situation of free fall in a Schwarzschild geometry these two effects are
decoupled and in con... | [
{
"created": "Fri, 14 Dec 2007 14:27:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Radosz",
"A.",
""
],
[
"Augousti",
"A. T.",
""
],
[
"Ostasiewicz",
"K.",
""
]
] | Two different forms of time dilation, namely, the kinematical time dilation of special relativity and gravitational red shift are coupled during observations of systems moving through a gravitational field. In the particular situation of free fall in a Schwarzschild geometry these two effects are decoupled and in conse... |
2011.11838 | Andrea Giusti | Bardia H. Fahim, Valerio Faraoni, and Andrea Giusti | Brans-Dicke analogue of the Roberts geometry | 6 pages, no figures. Title changed. Updated to match the published
version | Phys. Rev. D 103, 084004 (2021) | 10.1103/PhysRevD.103.084004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a new one-parameter family of spherically symmetric, inhomogeneous,
and time-dependent solutions of the vacuum Brans-Dicke field equations which
are conformal to the Roberts scalar field geometries of Einstein gravity. The
new solution is spherical and time-dependent and contains a naked central
singularity... | [
{
"created": "Tue, 24 Nov 2020 02:13:35 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Apr 2021 11:11:17 GMT",
"version": "v2"
}
] | 2021-04-12 | [
[
"Fahim",
"Bardia H.",
""
],
[
"Faraoni",
"Valerio",
""
],
[
"Giusti",
"Andrea",
""
]
] | We report a new one-parameter family of spherically symmetric, inhomogeneous, and time-dependent solutions of the vacuum Brans-Dicke field equations which are conformal to the Roberts scalar field geometries of Einstein gravity. The new solution is spherical and time-dependent and contains a naked central singularity. ... |
2107.00741 | Rohit Subbarayan Chandramouli | Rohit S. Chandramouli, Nicol\'as Yunes | Ready-to-use analytic model for gravitational waves from a hierarchical
triple with Kozai-Lidov oscillations | 30 pages, 13 figures | null | 10.1103/PhysRevD.105.064009 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves emitted by inner binaries in hierarchical triple systems
are interesting astrophysical candidates for space-based detectors like the
Laser Interferometer Space Antenna, LISA. In the presence of a third body, such
as a supermassive black hole, an inner binary consisting of intermediate mass
black h... | [
{
"created": "Thu, 1 Jul 2021 20:46:48 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Aug 2021 15:22:20 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Dec 2021 20:58:20 GMT",
"version": "v3"
},
{
"created": "Wed, 9 Mar 2022 02:11:23 GMT",
"version": "v4"
}
] | 2022-03-10 | [
[
"Chandramouli",
"Rohit S.",
""
],
[
"Yunes",
"Nicolás",
""
]
] | Gravitational waves emitted by inner binaries in hierarchical triple systems are interesting astrophysical candidates for space-based detectors like the Laser Interferometer Space Antenna, LISA. In the presence of a third body, such as a supermassive black hole, an inner binary consisting of intermediate mass black hol... |
1207.0115 | Norman Metzner | Norman Metzner | Twistor Theory of Higher-Dimensional Black Holes | DPhil Thesis (University of Oxford, submitted February 2012), 119
pages, 15 figures | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The correspondence of stationary, axisymmetric, asymptotically flat
space-times and bundles over a reduced twistor space has been established in
four dimensions. The main impediment for an application of this correspondence
to examples in higher dimensions is the lack of a higher-dimensional equivalent
of the Ernst p... | [
{
"created": "Sat, 30 Jun 2012 16:32:02 GMT",
"version": "v1"
}
] | 2012-07-03 | [
[
"Metzner",
"Norman",
""
]
] | The correspondence of stationary, axisymmetric, asymptotically flat space-times and bundles over a reduced twistor space has been established in four dimensions. The main impediment for an application of this correspondence to examples in higher dimensions is the lack of a higher-dimensional equivalent of the Ernst pot... |
1406.5112 | Thomas Linz | Thomas M. Linz, John L. Friedman, Alan G. Wiseman | Combined gravitational and electromagnetic self-force on charged
particles in electrovac spacetimes | Submitted to Phys Rev. D | Phys. Rev. D 90, 084031 (2014) | 10.1103/PhysRevD.90.084031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the self-force on a charged particle moving in a curved spacetime
with a background electromagnetic field, extending previous studies to
situations in which gravitational and electromagnetic perturbations are
comparable. The formal expression $f^{ret}_\alpha$ for the self-force on a
particle, written in t... | [
{
"created": "Thu, 19 Jun 2014 17:00:12 GMT",
"version": "v1"
}
] | 2014-10-22 | [
[
"Linz",
"Thomas M.",
""
],
[
"Friedman",
"John L.",
""
],
[
"Wiseman",
"Alan G.",
""
]
] | We consider the self-force on a charged particle moving in a curved spacetime with a background electromagnetic field, extending previous studies to situations in which gravitational and electromagnetic perturbations are comparable. The formal expression $f^{ret}_\alpha$ for the self-force on a particle, written in ter... |
1508.03247 | Wenliang Li | Wenliang Li | A unifying framework for ghost-free Lorentz-invariant Lagrangian field
theories | 8 pages, two columns, final version | null | 10.1016/j.physletb.2017.06.073 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a framework for Lorentz-invariant Lagrangian field theories where
Ostrogradsky's scalar ghosts could be absent. A key ingredient is the
generalized Kronecker delta. The general Lagrangians are reformulated in the
language of differential forms. The absence of higher order equations of motion
for the scalar... | [
{
"created": "Thu, 13 Aug 2015 15:22:40 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Oct 2015 15:47:39 GMT",
"version": "v2"
},
{
"created": "Sat, 24 Feb 2018 08:06:21 GMT",
"version": "v3"
}
] | 2018-02-27 | [
[
"Li",
"Wenliang",
""
]
] | We propose a framework for Lorentz-invariant Lagrangian field theories where Ostrogradsky's scalar ghosts could be absent. A key ingredient is the generalized Kronecker delta. The general Lagrangians are reformulated in the language of differential forms. The absence of higher order equations of motion for the scalar m... |
gr-qc/9210014 | Robert Brandenberger | Robert H. Brandenberger | A Nonsingular Universe | 11 pages, 2 figures (available from the author), uses phyzzx | null | null | Brown University, BROWN-HET-876 | gr-qc astro-ph hep-th | null | We construct an effective action for gravity in which all homogeneous
solutions are nonsingular. In particular, there is neither a big bang nor a big
crunch. The action is a higher derivative modification of Einstein's theory
constructed in analogy to how the action for point particle motion in special
relativity is ... | [
{
"created": "Sat, 24 Oct 1992 19:41:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brandenberger",
"Robert H.",
""
]
] | We construct an effective action for gravity in which all homogeneous solutions are nonsingular. In particular, there is neither a big bang nor a big crunch. The action is a higher derivative modification of Einstein's theory constructed in analogy to how the action for point particle motion in special relativity is ob... |
2404.14742 | Seoktae Koh | Peter K. S. Dunsby, Seoktae Koh, Abbas M. Sherif | Causal dynamics of null horizons under linear perturbations | 18 pages, no figures, all comments are welcome | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the causal dynamics of an embedded null horizon foliated by
marginally outer trapped surfaces (MOTS) for a locally rotationally symmetric
background spacetime subjected to linear perturbations. We introduce a simple
procedure which characterizes the transition of the causal character of the
null horizon. We ... | [
{
"created": "Tue, 23 Apr 2024 04:50:53 GMT",
"version": "v1"
}
] | 2024-04-24 | [
[
"Dunsby",
"Peter K. S.",
""
],
[
"Koh",
"Seoktae",
""
],
[
"Sherif",
"Abbas M.",
""
]
] | We study the causal dynamics of an embedded null horizon foliated by marginally outer trapped surfaces (MOTS) for a locally rotationally symmetric background spacetime subjected to linear perturbations. We introduce a simple procedure which characterizes the transition of the causal character of the null horizon. We ap... |
1004.5337 | Sergei Maydanyuk | Sergei P. Maydanyuk | Quantum method of determination of penetrability in FRW model with
radiation | 6 pages, Talk in the Humboldt-Kolleg "Humboldt Cosmos: Science and
Society", HCS2-Kiev2009 (Kiev, Ukraine, 19-22 of November, 2009) | Bullettin Univ. Kyiv. Ser.: Phys. Math. 3 (2010), 6p | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In paper the closed Friedmann-Robertson-Walker model with quantization in
presence of the positive cosmological constant, radiation and Chaplygin gas is
studied. For analysis of tunneling probability for birth of an asymptotically
deSitter, inflationary Universe as a function of the radiation energy a new
definition ... | [
{
"created": "Thu, 29 Apr 2010 16:38:19 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jul 2014 09:18:19 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Maydanyuk",
"Sergei P.",
""
]
] | In paper the closed Friedmann-Robertson-Walker model with quantization in presence of the positive cosmological constant, radiation and Chaplygin gas is studied. For analysis of tunneling probability for birth of an asymptotically deSitter, inflationary Universe as a function of the radiation energy a new definition of... |
1509.01833 | Martin Bojowald | Martin Bojowald | (Loop) quantum gravity and the inflationary scenario | 10 pages, 1 figure, invited contribution to a special issue published
by the French Academy of Sciences | Comptes Rendus - Physique 16 (2015) 1012-1017 | 10.1016/j.crhy.2015.08.007 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity, as a fundamental theory of space-time, is expected to reveal
how the universe may have started, perhaps during or before an inflationary
epoch. It may then leave a potentially observable (but probably minuscule)
trace in cosmic large-scale structures that seem to match well with predictions
of inflat... | [
{
"created": "Sun, 6 Sep 2015 17:11:59 GMT",
"version": "v1"
}
] | 2015-12-17 | [
[
"Bojowald",
"Martin",
""
]
] | Quantum gravity, as a fundamental theory of space-time, is expected to reveal how the universe may have started, perhaps during or before an inflationary epoch. It may then leave a potentially observable (but probably minuscule) trace in cosmic large-scale structures that seem to match well with predictions of inflatio... |
gr-qc/0503021 | Slava G. Turyshev | Slava G. Turyshev, Michael Martin Nieto, and John D. Anderson | A Route to Understanding of the Pioneer Anomaly | 9 pages, 5 figures. Invited talk given at ``The XXII Texas Symposium
on Relativistic Astrophysics,'' Stanford University, December 13-17, 2004 | `The XXII Texas Symposium on Relativistic Astrophysics,'' Stanford
U, December 13-17, 2004, edited by P. Chen, E. Bloom, G. Madejski, and V.
Petrosian. SLAC-R-752, Stanford e-Conf #C041213, paper #0310 | null | LA-UR-05-1570 | gr-qc | null | The Pioneer 10 and 11 spacecraft yielded the most precise navigation in deep
space to date. However, while at heliocentric distance of $\sim$ 20--70 AU, the
accuracies of their orbit reconstructions were limited by a small, anomalous,
Doppler frequency drift. This drift can be interpreted as a sunward constant
accele... | [
{
"created": "Fri, 4 Mar 2005 21:28:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Nieto",
"Michael Martin",
""
],
[
"Anderson",
"John D.",
""
]
] | The Pioneer 10 and 11 spacecraft yielded the most precise navigation in deep space to date. However, while at heliocentric distance of $\sim$ 20--70 AU, the accuracies of their orbit reconstructions were limited by a small, anomalous, Doppler frequency drift. This drift can be interpreted as a sunward constant accelera... |
1806.05728 | Ceren Bayraktar | Ceren H. Bayraktar | Thermodynamics of regular black holes with cosmic strings | Accepted for publication in EPJ Plus, 6 pages | Eur. Phys. J. Plus (2018) 133: 377 | 10.1140/epjp/i2018-12216-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, the thermodynamics of regular black holes with a cosmic
string passing through it is studied. We will observe that the string has no
effect on the temperature as well as the relation between entropy S and horizon
area A.
| [
{
"created": "Thu, 14 Jun 2018 20:23:25 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jun 2018 15:45:12 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Aug 2018 19:11:14 GMT",
"version": "v3"
}
] | 2018-09-20 | [
[
"Bayraktar",
"Ceren H.",
""
]
] | In this article, the thermodynamics of regular black holes with a cosmic string passing through it is studied. We will observe that the string has no effect on the temperature as well as the relation between entropy S and horizon area A. |
2304.12601 | Celia Escamilla-Rivera | Jos\'e Antonio N\'ajera, Carlos Ar\'aoz Alvarado and Celia
Escamilla-Rivera | Constraints on $f(Q)$ logarithmic model using gravitational wave
standard sirens | 17 pages, 3 figures. Version accepted in MNRAS | Monthly Notices of the Royal Astronomical Society, Volume 524,
Issue 4, October 2023, Pages 5280-5290 | 10.1093/mnras/stad2180 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the constraints on the $f(Q)=Q/(8\pi G) - \alpha
\ln(Q/Q_0)$, symmetric teleparallel model using local measurements and
gravitational wave mock standard sirens. Using observational local SNIa and BAO
data and energy conditions, the logarithmic $f(Q)$ model is capable of
explaining the cosmic l... | [
{
"created": "Tue, 25 Apr 2023 06:18:52 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jul 2023 03:29:53 GMT",
"version": "v2"
}
] | 2023-08-14 | [
[
"Nájera",
"José Antonio",
""
],
[
"Alvarado",
"Carlos Aráoz",
""
],
[
"Escamilla-Rivera",
"Celia",
""
]
] | In this paper, we study the constraints on the $f(Q)=Q/(8\pi G) - \alpha \ln(Q/Q_0)$, symmetric teleparallel model using local measurements and gravitational wave mock standard sirens. Using observational local SNIa and BAO data and energy conditions, the logarithmic $f(Q)$ model is capable of explaining the cosmic lat... |
1810.05645 | Zhongwen Feng | Zhong-Wen Feng, Qun-Chao Ding, Shu-Zheng Yang | Fermions tunneling from higher-dimensional charged AdS black hole in
dRGT massive gravity within modified dispersion relation | 7 pages, corrected typos | European Physical Journal C, 2019, 79:445 | 10.1140/epjc/s10052-019-6959-1 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The tunneling behavior of fermions with half-integral spin from a higher
dimensional charged anti-de Sitter (AdS) black hole in de Rham, Gabadadze and
Tolley (dRGT) massive gravity is investigated via a modified Hamilton-Jacobi
equation. The results demonstrate that the modified thermodynamic quantities
not only are ... | [
{
"created": "Sun, 14 Oct 2018 09:05:04 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Nov 2018 02:34:34 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Apr 2019 08:14:55 GMT",
"version": "v3"
},
{
"created": "Mon, 27 May 2019 02:33:07 GMT",
"version": "v4"
}
] | 2019-05-28 | [
[
"Feng",
"Zhong-Wen",
""
],
[
"Ding",
"Qun-Chao",
""
],
[
"Yang",
"Shu-Zheng",
""
]
] | The tunneling behavior of fermions with half-integral spin from a higher dimensional charged anti-de Sitter (AdS) black hole in de Rham, Gabadadze and Tolley (dRGT) massive gravity is investigated via a modified Hamilton-Jacobi equation. The results demonstrate that the modified thermodynamic quantities not only are re... |
gr-qc/9807006 | Tom Martin | Tom Martin | On the Motion of Free Material Test Particles in Arbitrary Spatial Flows | 9 pages, URL included | null | null | GRI-980630 | gr-qc | null | We show how the motion of free material test particles in arbitrary spatial
flows is easily determined within the context of ordinary vector calculus. This
may be useful for everyone, including engineers and other non-specialists, when
thinking about gravitational problems. It already has valid application to
simple ... | [
{
"created": "Thu, 2 Jul 1998 19:36:20 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jul 1998 21:45:02 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jun 1999 17:49:35 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Martin",
"Tom",
""
]
] | We show how the motion of free material test particles in arbitrary spatial flows is easily determined within the context of ordinary vector calculus. This may be useful for everyone, including engineers and other non-specialists, when thinking about gravitational problems. It already has valid application to simple pr... |
1404.1944 | Ulrich Jentschura | U. D. Jentschura | Fine-Structure Constant for Gravitational and Scalar Interactions | 6 pages; RevTeX | Phys.Rev.A 90 (2014) 022112 | 10.1103/PhysRevA.90.022112 | null | gr-qc hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the coupling of a relativistic quantum particle to the curved
Schwarzschild space-time, we show that the Dirac--Schwarzschild problem has
bound states and calculate their energies including relativistic corrections.
Relativistic effects are shown to be suppressed by the gravitational
fine-structure cons... | [
{
"created": "Thu, 3 Apr 2014 19:32:40 GMT",
"version": "v1"
}
] | 2014-08-21 | [
[
"Jentschura",
"U. D.",
""
]
] | Starting from the coupling of a relativistic quantum particle to the curved Schwarzschild space-time, we show that the Dirac--Schwarzschild problem has bound states and calculate their energies including relativistic corrections. Relativistic effects are shown to be suppressed by the gravitational fine-structure consta... |
gr-qc/0110120 | Maharana | Jnanadeva Maharana | From Big Crunch to Big Bang: A Quantum String Cosmology Perspective | 5 pages, Revtex, references added, discussions elaborated. To appear
in Physical Review D | Phys.Rev.D65:103504,2002 | 10.1103/PhysRevD.65.103504 | null | gr-qc astro-ph hep-th | null | The scenario that the Universe contracts towards a big crunch and then
undergoes a transition to expanding Universe in envisaged in the quantum string
cosmology approach. The Wheeler-De Witt equation is solved exactly for an
exponential dilaton potential. S-duality invariant cosmological effective
action, for type II... | [
{
"created": "Mon, 29 Oct 2001 12:34:20 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2002 06:08:33 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Maharana",
"Jnanadeva",
""
]
] | The scenario that the Universe contracts towards a big crunch and then undergoes a transition to expanding Universe in envisaged in the quantum string cosmology approach. The Wheeler-De Witt equation is solved exactly for an exponential dilaton potential. S-duality invariant cosmological effective action, for type IIB ... |
1504.07397 | Nicola Tamanini | Nicola Tamanini | On phenomenological models of dark energy interacting with dark matter | v2: matching published version | Phys. Rev. D 92, 043524 (2015) | 10.1103/PhysRevD.92.043524 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An interaction between dark matter and dark energy is usually introduced by a
phenomenological modification of the matter conservation equations, while the
Einstein equations are left unchanged. Starting from some general and
fundamental considerations, in this work it is shown that a coupling in the
dark sector is l... | [
{
"created": "Tue, 28 Apr 2015 09:51:17 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2015 10:04:55 GMT",
"version": "v2"
}
] | 2015-09-16 | [
[
"Tamanini",
"Nicola",
""
]
] | An interaction between dark matter and dark energy is usually introduced by a phenomenological modification of the matter conservation equations, while the Einstein equations are left unchanged. Starting from some general and fundamental considerations, in this work it is shown that a coupling in the dark sector is lik... |
1409.6044 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla and Ram\'on Torres | Particle production from marginally trapped surfaces of general
spacetimes | 24 pages, 2 figures. Section 4.2, concerning the analysis of the
Kerr-Vaidya solution, has been rewritten, correcting mistakes in previous
versions. The corrected calculations do support our claims. A corrigendum has
also been sent to CQG. New references added. Some of the mistakes in previous
versions are actu... | null | 10.1088/0264-9381/32/8/085004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a general formalism that allows to analyze the phenomenon of
tunneling in arbitrary spacetimes. We show that a flux of particles produced by
tunneling through general marginally trapped surfaces may be perceived by some
privileged observers. We discuss how this particle perception can be related to
Hawking... | [
{
"created": "Sun, 21 Sep 2014 21:44:10 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Dec 2014 22:10:39 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Feb 2015 18:07:26 GMT",
"version": "v3"
},
{
"created": "Sat, 27 Jun 2015 17:29:19 GMT",
"version": "v4"
}
] | 2015-06-30 | [
[
"Senovilla",
"José M. M.",
""
],
[
"Torres",
"Ramón",
""
]
] | We provide a general formalism that allows to analyze the phenomenon of tunneling in arbitrary spacetimes. We show that a flux of particles produced by tunneling through general marginally trapped surfaces may be perceived by some privileged observers. We discuss how this particle perception can be related to Hawking/U... |
1007.3571 | Rong-Jia Yang | Rong-Jia Yang | New types of $f(T)$ gravity | 6 pages, 9 figures, some changes are made | Eur. Phys. J. C 71, 1797 (2011) | 10.1140/epjc/s10052-011-1797-9 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently $f(T)$ theories based on modifications of teleparallel gravity where
torsion is the geometric object describing gravity instead of curvature have
been proposed to explain the present cosmic accelerating expansion. The field
equations are always second order, remarkably simpler than $f(R)$ theories. In
analog... | [
{
"created": "Wed, 21 Jul 2010 07:26:08 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Oct 2010 09:09:15 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Nov 2011 14:07:17 GMT",
"version": "v3"
}
] | 2011-11-10 | [
[
"Yang",
"Rong-Jia",
""
]
] | Recently $f(T)$ theories based on modifications of teleparallel gravity where torsion is the geometric object describing gravity instead of curvature have been proposed to explain the present cosmic accelerating expansion. The field equations are always second order, remarkably simpler than $f(R)$ theories. In analogy ... |
gr-qc/0002026 | Sandro S. e Costa | Sandro S. e Costa | Some integrals ocurring in a topology change problem | RevTeX article, 4 pages, 1 figure | Phys.Rev. D62 (2000) 047303 | 10.1103/PhysRevD.62.047303 | null | gr-qc | null | In a paper presented a few years ago, De Lorenci et al. showed, in the
context of canonical quantum cosmology, a model which allowed space topology
changes (Phys. Rev. D 56, 3329 (1997)). The purpose of this present work is to
go a step further in that model, by performing some calculations only estimated
there for s... | [
{
"created": "Mon, 7 Feb 2000 13:28:11 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Costa",
"Sandro S. e",
""
]
] | In a paper presented a few years ago, De Lorenci et al. showed, in the context of canonical quantum cosmology, a model which allowed space topology changes (Phys. Rev. D 56, 3329 (1997)). The purpose of this present work is to go a step further in that model, by performing some calculations only estimated there for sev... |
gr-qc/0407100 | Gregory J. Galloway | Gregory J. Galloway | Cosmological Spacetimes with $\Lambda > 0$ | 14 pages, 4 figures; based on a talk given at the Beemfest in May,
2003; to appear in Contemporary Mathematics | null | null | null | gr-qc | null | We discuss some global properties of cosmological spacetimes of de Sitter
type, based on results with Lars Andersson obtained in hep-th/0202161. We
relate the geometry and topology of conformal infinity to the occurrence of
singularities in such spacetimes, thereby extending to a much broader context
certain properti... | [
{
"created": "Tue, 27 Jul 2004 14:56:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Galloway",
"Gregory J.",
""
]
] | We discuss some global properties of cosmological spacetimes of de Sitter type, based on results with Lars Andersson obtained in hep-th/0202161. We relate the geometry and topology of conformal infinity to the occurrence of singularities in such spacetimes, thereby extending to a much broader context certain properties... |
1810.06073 | Yen Chin Ong | Shi-Qian Hu, Xiao-Mei Kuang, Yen Chin Ong | A Note on Smarr Relation and Coupling Constants | published version | Gen Relativ Gravit 51 (2019) 55 | 10.1007/s10714-019-2540-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Smarr relation plays an important role in black hole thermodynamics. It
is often claimed that the Smarr relation can be written down simply by
observing the scaling behavior of the various thermodynamical quantities. We
point out that this is not necessarily so in the presence of dimensionful
coupling constants, ... | [
{
"created": "Sun, 14 Oct 2018 17:59:24 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2019 07:37:08 GMT",
"version": "v2"
}
] | 2019-05-14 | [
[
"Hu",
"Shi-Qian",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Ong",
"Yen Chin",
""
]
] | The Smarr relation plays an important role in black hole thermodynamics. It is often claimed that the Smarr relation can be written down simply by observing the scaling behavior of the various thermodynamical quantities. We point out that this is not necessarily so in the presence of dimensionful coupling constants, an... |
1503.02618 | Abhay Shah | Abhay G. Shah, Bernard F. Whiting | Raising and Lowering operators of spin-weighted spheroidal harmonics | null | General Relativity and Gravitation 2016, 48:78 | 10.1007/s10714-016-2064-z | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we generalize the spin-raising and lowering operators of
spin-weighted spherical harmonics to linear-in-$\gamma$ spin-weighted
spheroidal harmonics where $\gamma$ is an additional parameter present in the
second order ordinary differential equation governing these harmonics. One can
then generalize thes... | [
{
"created": "Mon, 9 Mar 2015 18:58:38 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jun 2016 14:52:33 GMT",
"version": "v2"
}
] | 2016-06-06 | [
[
"Shah",
"Abhay G.",
""
],
[
"Whiting",
"Bernard F.",
""
]
] | In this paper we generalize the spin-raising and lowering operators of spin-weighted spherical harmonics to linear-in-$\gamma$ spin-weighted spheroidal harmonics where $\gamma$ is an additional parameter present in the second order ordinary differential equation governing these harmonics. One can then generalize these ... |
2001.06644 | M. Farasat Shamir | M. Farasat Shamir, Tayyaba Naz | Stellar Structures in $f(\mathcal{G})$ Gravity with Tolman-Kuchowicz
Spacetime | 16 pages, accepted for publication in Physics of the Dark Universe | Phys. Dark Universe 27, 100472 (2020) | 10.1016/j.dark.2020.100472 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to explore some relativistic configurations of stellar
objects for static spherically symmetric structures in the context of modified
$f(\mathcal{G})$ gravity, by exploiting the Tolman-Kuchowicz spacetime [1,2].
We develop the equations of motion for spherically symmetric spacetime in the
presen... | [
{
"created": "Sat, 18 Jan 2020 10:26:40 GMT",
"version": "v1"
}
] | 2020-01-23 | [
[
"Shamir",
"M. Farasat",
""
],
[
"Naz",
"Tayyaba",
""
]
] | This paper is devoted to explore some relativistic configurations of stellar objects for static spherically symmetric structures in the context of modified $f(\mathcal{G})$ gravity, by exploiting the Tolman-Kuchowicz spacetime [1,2]. We develop the equations of motion for spherically symmetric spacetime in the presence... |
gr-qc/0207071 | Enrico Calzavarini | Enrico Calzavarini, Laura Sartori, Fabio Schifano, Raffaele
Tripiccione, Andrea Vicere' | Matched filters for coalescing binaries detection on massively parallel
computers | 19 pages, 6 figures | Comput.Phys.Commun.152:295-306,2003 | 10.1016/S0010-4655(02)00848-2 | null | gr-qc | null | We discuss some computational problems associated to matched filtering of
experimental signals from gravitational wave interferometric detectors in a
parallel-processing environment. We then specialize our discussion to the use
of the APEmille and apeNEXT processors for this task. Finally, we accurately
estimate the ... | [
{
"created": "Thu, 18 Jul 2002 14:19:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Calzavarini",
"Enrico",
""
],
[
"Sartori",
"Laura",
""
],
[
"Schifano",
"Fabio",
""
],
[
"Tripiccione",
"Raffaele",
""
],
[
"Vicere'",
"Andrea",
""
]
] | We discuss some computational problems associated to matched filtering of experimental signals from gravitational wave interferometric detectors in a parallel-processing environment. We then specialize our discussion to the use of the APEmille and apeNEXT processors for this task. Finally, we accurately estimate the pe... |
gr-qc/0508030 | Ru-Keng Su | Cheng-Gang Shao, Jianyong Shen, Bin Wang, Ru-Keng Su | Dirac Cosmology and the Acceleration of the Contemporary Universe | 13 pages, 8 figures | Class.Quant.Grav. 23 (2006) 3707-3720 | 10.1088/0264-9381/23/11/003 | null | gr-qc | null | A model is suggested to unify the Einstein GR and Dirac Cosmology. There is
one adjusted parameter $b_2$ in our model. After adjusting the parameter $b_2$
in the model by using the supernova data, we have calculated the gravitational
constant $\bar G$ and the physical quantities of $a(t)$, $q(t)$ and $\rho_r(t)/
\rho... | [
{
"created": "Tue, 9 Aug 2005 06:28:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Shao",
"Cheng-Gang",
""
],
[
"Shen",
"Jianyong",
""
],
[
"Wang",
"Bin",
""
],
[
"Su",
"Ru-Keng",
""
]
] | A model is suggested to unify the Einstein GR and Dirac Cosmology. There is one adjusted parameter $b_2$ in our model. After adjusting the parameter $b_2$ in the model by using the supernova data, we have calculated the gravitational constant $\bar G$ and the physical quantities of $a(t)$, $q(t)$ and $\rho_r(t)/ \rho_b... |
gr-qc/0012027 | C. M. zhang | C.M. Zhang | Mass neutrino flavor evolution in spacetime with torsion | 8 papes, no fiure | Nuovo Cim.B115:437-444,2000 | null | null | gr-qc | null | In the framework of the spacetime with torsion, we obtain the flavor
evolution equation of the mass neutrino oscillation in vacuum. A comparison
with the result of general relativity case, it shows that the flavor
evolutionary equations in Riemann spacetime and Weitzenb\"ock spacetimes are
equivalent in the spherical... | [
{
"created": "Wed, 6 Dec 2000 15:14:55 GMT",
"version": "v1"
}
] | 2011-09-13 | [
[
"Zhang",
"C. M.",
""
]
] | In the framework of the spacetime with torsion, we obtain the flavor evolution equation of the mass neutrino oscillation in vacuum. A comparison with the result of general relativity case, it shows that the flavor evolutionary equations in Riemann spacetime and Weitzenb\"ock spacetimes are equivalent in the spherical s... |
gr-qc/9903037 | Marcelo J. Reboucas | G.I. Gomero, M.J. Reboucas, A.F.F. Teixeira, A. Bernui | Topological Reverberations in Flat Space-times | 16 pages, 4 figures, REVTEX; Added five references and inserted
clarifying details. Version to appear in Int. J. Mod. Phys. A (2000) | Int.J.Mod.Phys. A15 (2000) 4141-4162 | 10.1142/S0217751X00002081 | CBPF-NF-051/98 | gr-qc astro-ph hep-th math-ph math.MP | null | We study the role played by multiply-connectedness in the time evolution of
the energy E(t) of a radiating system that lies in static flat space-time
manifolds M_4 whose t=const spacelike sections M_3 are compact in at least one
spatial direction. The radiation reaction equation of the radiating source is
derived for... | [
{
"created": "Tue, 9 Mar 1999 22:36:46 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2000 00:35:26 GMT",
"version": "v2"
}
] | 2016-12-21 | [
[
"Gomero",
"G. I.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Teixeira",
"A. F. F.",
""
],
[
"Bernui",
"A.",
""
]
] | We study the role played by multiply-connectedness in the time evolution of the energy E(t) of a radiating system that lies in static flat space-time manifolds M_4 whose t=const spacelike sections M_3 are compact in at least one spatial direction. The radiation reaction equation of the radiating source is derived for t... |
gr-qc/9706033 | Doug Eardley | Shawn J. Kolitch (Physics, UCSB) and Douglas M. Eardley (ITP, UCSB) | Quantum Decay of Domain Walls in Cosmology II: Hamiltonian Approach | 27 pages LaTeX, using revtex and psfig. 3 figures | Phys. Rev. D 56, 4663 (1997) | 10.1103/PhysRevD.56.4663 | NSF-ITP-97-051 | gr-qc hep-th | null | This paper studies the decay of a large, closed domain wall in a closed
universe. Such walls can form in the presence of a broken, discrete symmetry.
We study a novel process of quantum decay for such a wall, in which the vacuum
fluctuates from one discrete state to another throughout one half of the
universe, so tha... | [
{
"created": "Thu, 12 Jun 1997 17:32:06 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Kolitch",
"Shawn J.",
"",
"Physics, UCSB"
],
[
"Eardley",
"Douglas M.",
"",
"ITP, UCSB"
]
] | This paper studies the decay of a large, closed domain wall in a closed universe. Such walls can form in the presence of a broken, discrete symmetry. We study a novel process of quantum decay for such a wall, in which the vacuum fluctuates from one discrete state to another throughout one half of the universe, so that ... |
1906.08166 | Susanne Schander | S. Schander, T. Thiemann | Quantum Cosmological Backreactions I: Cosmological Space Adiabatic
Perturbation Theory | 35 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The search for quantum gravity fingerprints in currently available
cosmological data that have their origin from the Planck era is of growing
interest due to major recent progress both in the theoretical modelling as well
as the observational precision. Unsurprisingly, the theoretical predictions are
very sensitive t... | [
{
"created": "Wed, 19 Jun 2019 15:44:25 GMT",
"version": "v1"
}
] | 2019-06-20 | [
[
"Schander",
"S.",
""
],
[
"Thiemann",
"T.",
""
]
] | The search for quantum gravity fingerprints in currently available cosmological data that have their origin from the Planck era is of growing interest due to major recent progress both in the theoretical modelling as well as the observational precision. Unsurprisingly, the theoretical predictions are very sensitive to ... |
2202.09453 | Allen Stern | S. Fabi, A. Stern and Chuang Xu | Cosmic acceleration in Regge-Teitelboim gravity | 11 pages, 3 figures | null | 10.1088/1361-6382/ac813f | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Regge-Teitelboim formulation of gravity, which utilizes dynamical
embeddings in a background space, effectively introduces source terms in the
standard Einstein equations that are not attributable to the energy-momentum
tensor. We show that for a simple class of embeddings of the Robertson-Walker
metric, these so... | [
{
"created": "Fri, 18 Feb 2022 22:19:35 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Fabi",
"S.",
""
],
[
"Stern",
"A.",
""
],
[
"Xu",
"Chuang",
""
]
] | The Regge-Teitelboim formulation of gravity, which utilizes dynamical embeddings in a background space, effectively introduces source terms in the standard Einstein equations that are not attributable to the energy-momentum tensor. We show that for a simple class of embeddings of the Robertson-Walker metric, these sour... |
2212.02829 | Mario Martinez Dr. | M. Andres-Carcasona, A. Menendez-Vazquez, M. Martinez, Ll. M. Mir | Searches for Mass-Asymmetric Compact Binary Coalescence Events using
Neural Networks in the LIGO/Virgo Third Observation Period | 8 pages, 12 figures, 4 tables, to be submitted to PRD. arXiv admin
note: text overlap with arXiv:2012.10702 | null | 10.1103/PhysRevD.107.082003 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present the results on the search for the coalescence of compact binary
mergers with very asymmetric mass configurations using convolutional neural
networks and the LIGO/Virgo data for the O3 observation period. Two-dimensional
images in time and frequency are used as input. Masses in the range between
0.01 Msun a... | [
{
"created": "Tue, 6 Dec 2022 08:57:24 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Andres-Carcasona",
"M.",
""
],
[
"Menendez-Vazquez",
"A.",
""
],
[
"Martinez",
"M.",
""
],
[
"Mir",
"Ll. M.",
""
]
] | We present the results on the search for the coalescence of compact binary mergers with very asymmetric mass configurations using convolutional neural networks and the LIGO/Virgo data for the O3 observation period. Two-dimensional images in time and frequency are used as input. Masses in the range between 0.01 Msun and... |
gr-qc/0201042 | R. S. Ward | R. S. Ward | Stability of Sigma-Model Strings and Textures | 9 pages, to be published in Classical and Quantum Gravity | Class.Quant.Grav.19:L17,2002 | 10.1088/0264-9381/19/4/101 | DCPT-02/05 | gr-qc | null | In flat space-time, sigma-model strings and textures are both unstable to
collapse and subsequent decay. With sufficient cosmological expansion, however,
they are stable in a generalized sense: a small perturbation will cause them to
change their shape, but they do not decay. The current rate of expansion is
sufficie... | [
{
"created": "Mon, 14 Jan 2002 13:13:36 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Ward",
"R. S.",
""
]
] | In flat space-time, sigma-model strings and textures are both unstable to collapse and subsequent decay. With sufficient cosmological expansion, however, they are stable in a generalized sense: a small perturbation will cause them to change their shape, but they do not decay. The current rate of expansion is sufficient... |
0912.3641 | Nakia Carlevaro | Nakia Carlevaro, Giovanni Montani | Gravitational Instability in Presence of Bulk Viscosity: the Jeans Mass
and the Quasi-Isotropic Solution | 3 pages, Proceedings of The XII Marcel Grossmann Meeting | null | 10.1142/9789814374552_0212 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper focuses on the analysis of the gravitational instability in
presence of bulk viscosity both in Newtonian regime and in the
fully-relativistic approach. The standard Jeans Mechanism and the
Quasi-Isotropic Solution are treated expressing the bulk-viscosity coefficient
$\zeta$ as a power-law of the fluid ene... | [
{
"created": "Fri, 18 Dec 2009 10:55:36 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Carlevaro",
"Nakia",
""
],
[
"Montani",
"Giovanni",
""
]
] | This paper focuses on the analysis of the gravitational instability in presence of bulk viscosity both in Newtonian regime and in the fully-relativistic approach. The standard Jeans Mechanism and the Quasi-Isotropic Solution are treated expressing the bulk-viscosity coefficient $\zeta$ as a power-law of the fluid energ... |
2301.02398 | Soumya Mohanty | Soumya D. Mohanty, Mohammad A. T. Chowdhury | Glitch subtraction from gravitational wave data using adaptive spline
fitting | 17 pages, 7 figures, revised version (new figure added) | null | 10.1088/1361-6382/acd0fe | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Transient signals of instrumental and environmental origins ("glitches") in
gravitational wave data elevate the false alarm rate of searches for
astrophysical signals and reduce their sensitivity. Glitches that directly
overlap astrophysical signals hinder their detection and worsen parameter
estimation errors. As th... | [
{
"created": "Fri, 6 Jan 2023 06:32:59 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Feb 2023 06:18:53 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Mar 2023 21:42:33 GMT",
"version": "v3"
}
] | 2023-05-24 | [
[
"Mohanty",
"Soumya D.",
""
],
[
"Chowdhury",
"Mohammad A. T.",
""
]
] | Transient signals of instrumental and environmental origins ("glitches") in gravitational wave data elevate the false alarm rate of searches for astrophysical signals and reduce their sensitivity. Glitches that directly overlap astrophysical signals hinder their detection and worsen parameter estimation errors. As the ... |
gr-qc/0410097 | Yasunori Fujii | Yasunori Fujii | Some aspects of the scalar-tensor theory | 12 pages 4 figures. Based on the talks delivered at Second Advanced
Research Workshop, Gravity, Astrophysics, and Strings, Kiten, Bulgaria, June
10-16, 2004 | null | null | null | gr-qc | null | The scalar-tensor theory of gravitation has been and still is one of the most
widely discussed "alternative theories" to General Relativity (GR). Despite
nearly half a century of its age, it continues to attract renewed interests of
not only theorists but also experimentalists when we now face such issues like
the ac... | [
{
"created": "Wed, 20 Oct 2004 07:33:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fujii",
"Yasunori",
""
]
] | The scalar-tensor theory of gravitation has been and still is one of the most widely discussed "alternative theories" to General Relativity (GR). Despite nearly half a century of its age, it continues to attract renewed interests of not only theorists but also experimentalists when we now face such issues like the acce... |
1406.7135 | Katerina Chatziioannou | Katerina Chatziioannou, Kent Yagi, and Nicolas Yunes | Toward Realistic and Practical No-Hair Relations for Neutron Stars in
the Non-Relativistic Limit | 10 pages, 5 figures, published version | null | 10.1103/PhysRevD.90.064030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational properties of astrophysical objects depend sensitively on
their internal structure. In Newtonian theory, the gravitational potential of a
rotating star can be fully described by an infinite number of multipole moments
of its mass distribution. Recently, this infinite number of moments for
uniformly-... | [
{
"created": "Fri, 27 Jun 2014 10:02:34 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Sep 2014 04:23:53 GMT",
"version": "v2"
}
] | 2014-10-01 | [
[
"Chatziioannou",
"Katerina",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | The gravitational properties of astrophysical objects depend sensitively on their internal structure. In Newtonian theory, the gravitational potential of a rotating star can be fully described by an infinite number of multipole moments of its mass distribution. Recently, this infinite number of moments for uniformly-ro... |
1201.5470 | I\~naki Garay | Enrique F. Borja, Jacobo D\'iaz-Polo, Laurent Freidel, I\~naki Garay,
Etera R. Livine | New tools for Loop Quantum Gravity with applications to a simple model | 4 pages, to appear in Proceedings of Spanish Relativity Meeting 2011
(ERE 2011) held in Madrid, Spain | null | 10.1063/1.4734429 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Quantum Gravity is now a well established approach to quantum gravity.
One of the main challenges still faced by the theory is constructing a
consistent dynamics which would lead back to the standard dynamics of the
gravitational field at large scales. Here we will review the recent U(N)
framework for Loop Quant... | [
{
"created": "Thu, 26 Jan 2012 10:13:33 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Borja",
"Enrique F.",
""
],
[
"Díaz-Polo",
"Jacobo",
""
],
[
"Freidel",
"Laurent",
""
],
[
"Garay",
"Iñaki",
""
],
[
"Livine",
"Etera R.",
""
]
] | Loop Quantum Gravity is now a well established approach to quantum gravity. One of the main challenges still faced by the theory is constructing a consistent dynamics which would lead back to the standard dynamics of the gravitational field at large scales. Here we will review the recent U(N) framework for Loop Quantum... |
gr-qc/0509010 | Muzaffer Adak | Muzaffer Adak, (Pamukkale Univ., Turkey) | Nonmetricity and torsion induced by dilaton gravity in two dimension | Added references, Accepted for publication in GRG | Gen.Rel.Grav. 38 (2006) 971-980 | 10.1007/s10714-006-0298-x | null | gr-qc | null | We develop a theory in which there are couplings amongst Dirac spinor,
dilaton and non-Riemannian gravity and explore the nature of connection-induced
dilaton couplings to gravity and Dirac spinor when the theory is reformulated
in terms of the Levi-Civita connection. After presenting some exact solutions
without spi... | [
{
"created": "Fri, 2 Sep 2005 09:50:18 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2005 08:16:42 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Feb 2006 09:44:15 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Adak",
"Muzaffer",
""
]
] | We develop a theory in which there are couplings amongst Dirac spinor, dilaton and non-Riemannian gravity and explore the nature of connection-induced dilaton couplings to gravity and Dirac spinor when the theory is reformulated in terms of the Levi-Civita connection. After presenting some exact solutions without spino... |
gr-qc/0612189 | Robert Beig | Robert Beig, Bernd G. Schmidt | Celestial mechanics of elastic bodies | 16 pages, 2 figures, several typos removed, erratum appeared in
MathZ.263:233,2009 | Math.Z.258:381-394,2008 | 10.1007/s00209-007-0177-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct time independent configurations of two gravitating elastic
bodies. These configurations either correspond to the two bodies moving in a
circular orbit around their center of mass or strictly static configurations.
| [
{
"created": "Fri, 29 Dec 2006 14:43:11 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jul 2009 14:37:20 GMT",
"version": "v2"
}
] | 2009-07-27 | [
[
"Beig",
"Robert",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | We construct time independent configurations of two gravitating elastic bodies. These configurations either correspond to the two bodies moving in a circular orbit around their center of mass or strictly static configurations. |
1805.00588 | Kiyoshi Shiraishi | Katsuhiko Yoshida, Satoru Hirenzaki, Kiyoshi Shiraishi | Euclidean wormhole solutions of Einstein-Yang-Mills theory in diverse
dimensions | 16 pages, 10 figures | Physical Review D42, No. 6, pp.1973-1981, 15 September 1990 | 10.1103/PhysRevD.42.1973 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the Euclidean Einstein equations with non-Abelian gauge fields of
sufficiently large symmetry in various dimensions. In higher-dimensional
spaces, we find the solutions which are similar to so-called scalar wormholes.
In four-dimensional space-time, we find singular wormhole solutions with
infinite Euclidean... | [
{
"created": "Wed, 2 May 2018 00:44:21 GMT",
"version": "v1"
}
] | 2018-05-09 | [
[
"Yoshida",
"Katsuhiko",
""
],
[
"Hirenzaki",
"Satoru",
""
],
[
"Shiraishi",
"Kiyoshi",
""
]
] | We solve the Euclidean Einstein equations with non-Abelian gauge fields of sufficiently large symmetry in various dimensions. In higher-dimensional spaces, we find the solutions which are similar to so-called scalar wormholes. In four-dimensional space-time, we find singular wormhole solutions with infinite Euclidean a... |
gr-qc/0204026 | Luca Fabbri | Luca Fabbri | Taking Kaluza seriously leads to a non-gauge-invariant electromagnetic
theory in a curved space-time | 6 pages, corrected typos | Annales Fond.Broglie 29:641-649,2004 | null | null | gr-qc | null | Kaluza's mertic with the cylinder condition is considered without the weak
gravitational field approximation. It is shown that these hypoteses lead to a
non-gauge-invariant electromagnetic theory in a curved space-time. The problem
of electro-gravitational unification is considered from this point of view.
| [
{
"created": "Fri, 5 Apr 2002 14:56:24 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2004 15:43:36 GMT",
"version": "v2"
}
] | 2009-05-18 | [
[
"Fabbri",
"Luca",
""
]
] | Kaluza's mertic with the cylinder condition is considered without the weak gravitational field approximation. It is shown that these hypoteses lead to a non-gauge-invariant electromagnetic theory in a curved space-time. The problem of electro-gravitational unification is considered from this point of view. |
2008.10026 | Cl\'audio Gomes | Cl\'audio Gomes | Jeans Instability in Non-Minimal Matter-Curvature Coupling Gravity | 8 pages, 1 figure | Eur.Phys.J.C 80 (2020) 7, 633 | 10.1140/epjc/s10052-020-8189-y | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak field limit of the nonminimally coupled Boltzmann equation is
studied, and relations between the invariant Bardeen scalar potentials are
derived. The Jean's criterion for instabilities is found through the modified
dispersion relation. Special cases are scrutinised and considerations on the
model parameters ... | [
{
"created": "Sun, 23 Aug 2020 12:18:55 GMT",
"version": "v1"
}
] | 2020-08-25 | [
[
"Gomes",
"Cláudio",
""
]
] | The weak field limit of the nonminimally coupled Boltzmann equation is studied, and relations between the invariant Bardeen scalar potentials are derived. The Jean's criterion for instabilities is found through the modified dispersion relation. Special cases are scrutinised and considerations on the model parameters ar... |
gr-qc/0301044 | Campo David | David Campo and Renaud Parentani | Space-time correlations within pairs produced during inflation, a
wave-packet analysis | discussion clarified, acknowledgements and references added, version
accepted in PRD | Phys.Rev. D67 (2003) 103522 | 10.1103/PhysRevD.67.103522 | null | gr-qc astro-ph hep-th | null | In homogeneous universes the propagation of quantum fields gives rise to pair
creation of quanta with opposite momenta. When computing expectation values of
operators, the correlations between these quanta are averaged out and no
space-time structure is obtained. In this article, by an appropriate use of
wave packets... | [
{
"created": "Mon, 13 Jan 2003 17:05:06 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Apr 2003 11:15:03 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Campo",
"David",
""
],
[
"Parentani",
"Renaud",
""
]
] | In homogeneous universes the propagation of quantum fields gives rise to pair creation of quanta with opposite momenta. When computing expectation values of operators, the correlations between these quanta are averaged out and no space-time structure is obtained. In this article, by an appropriate use of wave packets, ... |
1503.00359 | Leonard Parker | Leonard Parker | Creation of quantized particles, gravitons and scalar perturbations by
the expanding universe | Plenary Lecture given September 2, 2014 at the ERE2014 Conference in
Valencia, Spain To appear in the Proceedings of the ERE2014 Conference | null | 10.1088/1742-6596/600/1/012001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum creation processes during the very rapid early expansion of the
universe are believed to give rise to temperature anisotropies and polarization
patterns in the CMB radiation. These have been observed by satellites such as
COBE, WMAP, and PLANCK, and by bolometric instruments placed near the South
Pole by the ... | [
{
"created": "Sun, 1 Mar 2015 21:47:37 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Parker",
"Leonard",
""
]
] | Quantum creation processes during the very rapid early expansion of the universe are believed to give rise to temperature anisotropies and polarization patterns in the CMB radiation. These have been observed by satellites such as COBE, WMAP, and PLANCK, and by bolometric instruments placed near the South Pole by the BI... |
1603.00151 | Yi-Zen Chu | Yi-Zen Chu | Gravitational Wave Memory In dS$_{4+2n}$ and 4D Cosmology | 30 pages, 1 figure | null | 10.1088/1361-6382/34/3/035009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that massless gravitons in all even dimensional de Sitter (dS)
spacetimes higher than two admit a linear memory effect arising from their
propagation inside the null cone. Assume that gravitational waves (GWs) are
being generated by an isolated source, and over only a finite period of time.
Outside of this t... | [
{
"created": "Tue, 1 Mar 2016 05:40:40 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2016 08:34:53 GMT",
"version": "v2"
}
] | 2017-01-18 | [
[
"Chu",
"Yi-Zen",
""
]
] | We argue that massless gravitons in all even dimensional de Sitter (dS) spacetimes higher than two admit a linear memory effect arising from their propagation inside the null cone. Assume that gravitational waves (GWs) are being generated by an isolated source, and over only a finite period of time. Outside of this tim... |
1605.02781 | Kimet Jusufi | Kimet Jusufi | Light Deflection with Torsion Effects Caused by a Spinning Cosmic String | 7 pages, accepted for publication in European Physical Journal C | Eur. Phys. J. C (2016) 76:332 | 10.1140/epjc/s10052-016-4185-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a new geometrical method introduced by Werner, we find the deflection
angle in the weak limit approximation by a spinning cosmic string in the
context of the Einstein-Cartan (EC) theory of gravity. We begin by adopting the
String-Randers optical metric, then we apply the Gauss-Bonnet theorem to the
optical geom... | [
{
"created": "Mon, 9 May 2016 21:02:06 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2016 11:13:58 GMT",
"version": "v2"
}
] | 2016-06-17 | [
[
"Jusufi",
"Kimet",
""
]
] | Using a new geometrical method introduced by Werner, we find the deflection angle in the weak limit approximation by a spinning cosmic string in the context of the Einstein-Cartan (EC) theory of gravity. We begin by adopting the String-Randers optical metric, then we apply the Gauss-Bonnet theorem to the optical geomet... |
1711.04254 | Dr. Sudhaker Upadhyay | Sudhaker Upadhyay and Behnam Pourhassan | Logarithmic corrected Van der Waals black holes in higher dimensional
AdS space | 18 pages, 18 captioned figures, to appear in PTEP | Prog. Theor. Exp. Phys. 2019, 013B03 | 10.1093/ptep/pty145 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider AdS black hole in $d$-dimensional space-time and
calculate the logarithmic corrected thermodynamics quantities. We study the
effects of thermal fluctuations on the thermodynamics of higher dimensional AdS
black hole. We exploit such logarithmic corrected quantities to construct Van
der Wall... | [
{
"created": "Sun, 12 Nov 2017 09:06:19 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jul 2018 08:05:17 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Dec 2018 14:23:14 GMT",
"version": "v3"
}
] | 2019-08-21 | [
[
"Upadhyay",
"Sudhaker",
""
],
[
"Pourhassan",
"Behnam",
""
]
] | In this paper, we consider AdS black hole in $d$-dimensional space-time and calculate the logarithmic corrected thermodynamics quantities. We study the effects of thermal fluctuations on the thermodynamics of higher dimensional AdS black hole. We exploit such logarithmic corrected quantities to construct Van der Walls ... |
2009.04335 | Andrea Giusti | Andrea Giusti, Roberto Garrappa, Genevi\`eve Vachon | On the Kuzmin model in fractional Newtonian gravity | 13 pages, 8 figures, published in EPJ Plus | Eur. Phys. J. Plus 135 (2020) 798 | 10.1140/epjp/s13360-020-00831-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fractional Newtonian gravity, based on the fractional generalization of
Poisson's equation for Newtonian gravity, is a novel approach to Galactic
dynamics aimed at providing an alternative to the dark matter paradigm through
a non-local modification of Newton's theory. We provide an in-depth discussion
of the gravita... | [
{
"created": "Wed, 9 Sep 2020 14:47:23 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 2020 12:23:20 GMT",
"version": "v2"
}
] | 2020-10-12 | [
[
"Giusti",
"Andrea",
""
],
[
"Garrappa",
"Roberto",
""
],
[
"Vachon",
"Geneviève",
""
]
] | Fractional Newtonian gravity, based on the fractional generalization of Poisson's equation for Newtonian gravity, is a novel approach to Galactic dynamics aimed at providing an alternative to the dark matter paradigm through a non-local modification of Newton's theory. We provide an in-depth discussion of the gravitati... |
0801.3740 | Massimo Bassan | A.V.Gusev, V.N.Rudenko, S.A.Cheprasov, M.Bassan | Reception frequency bandwidth of a gravitational resonant detector with
optical readout | 16 pages + 3 figures. Accepted for publicationi in Class. Quantum
Grav | null | 10.1088/0264-9381/25/5/055006 | null | gr-qc | null | A gravitational resonant bar detector with a large scale Fabry-Perot cavity
as an optical read out and a mechanical displacement transformer is considered.
We calculate, in a fully analytical way, the final receiver bandwidth in which
the potential sensitivity, limited only by the bar thermal noise, is maintained
des... | [
{
"created": "Thu, 24 Jan 2008 12:29:55 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Feb 2008 17:54:13 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Gusev",
"A. V.",
""
],
[
"Rudenko",
"V. N.",
""
],
[
"Cheprasov",
"S. A.",
""
],
[
"Bassan",
"M.",
""
]
] | A gravitational resonant bar detector with a large scale Fabry-Perot cavity as an optical read out and a mechanical displacement transformer is considered. We calculate, in a fully analytical way, the final receiver bandwidth in which the potential sensitivity, limited only by the bar thermal noise, is maintained despi... |
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