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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0105082 | Maurizio Gasperini | M. Gasperini | Dilatonic Interpretation of the Quintessence? | 6 pages, Revtex, four figures included using epsfig. To appear in
Phys. Rev. D | Phys.Rev. D64 (2001) 043510 | 10.1103/PhysRevD.64.043510 | BA-TH/01-409 | gr-qc astro-ph hep-th | null | We discuss the possibility that "quintessential effects", recently displayed
by large scale observations, may be consistently described in the context of
the low-energy string effective action, and we suggest a possible approach to
the problem of the cosmic coincidence based on the link between the strength of
the di... | [
{
"created": "Wed, 23 May 2001 20:26:28 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gasperini",
"M.",
""
]
] | We discuss the possibility that "quintessential effects", recently displayed by large scale observations, may be consistently described in the context of the low-energy string effective action, and we suggest a possible approach to the problem of the cosmic coincidence based on the link between the strength of the dila... |
2210.04674 | Vitalii Vertogradov | Vitalii Vertogradov | Geodesics for particles with negative energy in Kerr's metric | 8 pages | Gravitation and Cosmology 21(2):171-174 (2015) | 10.1134/S0202289315020115 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | According to Penrose effect, particles with negative energy can exist in the
ergospheres of rotating black holes. We analyze geodesics for such particles
and show that there are no circular and elliptic orbits in the ergosphere of a
rotating black hole. We also show that there are geodesics which begin and
terminate ... | [
{
"created": "Mon, 10 Oct 2022 13:25:34 GMT",
"version": "v1"
}
] | 2022-10-11 | [
[
"Vertogradov",
"Vitalii",
""
]
] | According to Penrose effect, particles with negative energy can exist in the ergospheres of rotating black holes. We analyze geodesics for such particles and show that there are no circular and elliptic orbits in the ergosphere of a rotating black hole. We also show that there are geodesics which begin and terminate at... |
1506.03375 | Babak Vakili | M. A. Gorji, K. Nozari and B. Vakili | Polymer quantization versus the Snyder noncommutative space | 14 pages, 1 figure, to appear in CQG | Class. Quantum Grav. 32 (2015) 155007 | 10.1088/0264-9381/32/15/155007 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a noncanonical Hilbert space representation of the polymer quantum
mechanics. It is shown that Heisenberg algebra get some modifications in the
constructed setup from which a generalized uncertainty principle will naturally
come out. Although the extracted physical results are the same as those
obtained from... | [
{
"created": "Wed, 10 Jun 2015 16:15:03 GMT",
"version": "v1"
}
] | 2015-07-14 | [
[
"Gorji",
"M. A.",
""
],
[
"Nozari",
"K.",
""
],
[
"Vakili",
"B.",
""
]
] | We study a noncanonical Hilbert space representation of the polymer quantum mechanics. It is shown that Heisenberg algebra get some modifications in the constructed setup from which a generalized uncertainty principle will naturally come out. Although the extracted physical results are the same as those obtained from t... |
1105.2802 | Alfredo Lopez Ortega | A. Lopez-Ortega, I. Vega-Acevedo | Quasinormal frequencies of asymptotically flat two-dimensional black
holes | 12 pages. Accepted for publication in Gen. Rel. and Grav | Gen.Rel.Grav.43:2631-2647,2011 | 10.1007/s10714-011-1185-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss whether the minimally coupled massless Klein-Gordon and Dirac
fields have well defined quasinormal modes in single horizon, asymptotically
flat two-dimensional black holes. To get the result we solve the equations of
motion in the massless limit and we also calculate the effective potentials of
Schrodinger... | [
{
"created": "Fri, 13 May 2011 18:42:35 GMT",
"version": "v1"
}
] | 2011-09-28 | [
[
"Lopez-Ortega",
"A.",
""
],
[
"Vega-Acevedo",
"I.",
""
]
] | We discuss whether the minimally coupled massless Klein-Gordon and Dirac fields have well defined quasinormal modes in single horizon, asymptotically flat two-dimensional black holes. To get the result we solve the equations of motion in the massless limit and we also calculate the effective potentials of Schrodinger t... |
1007.4627 | S Habib Mazharimousavi | S. Habib Mazharimousavi, M. Halilsoy, Z. Amirabi | Higher dimensional thin-shell wormholes in
Einstein-Yang-Mills-Gauss-Bonnet gravity | 9 pages, 6 figures. Dedicated to the memory of Rev. Ibrahim Eken
(1927-2010) of Turkey | Class.Quant.Grav.28:025004,2011 | 10.1088/0264-9381/28/2/025004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present thin-shell wormhole solutions in Einstein-Yang-Mills-Gauss-Bonnet
(EYMGB) theory in higher dimensions d\geq5. Exact black hole solutions are
employed for this purpose where the radius of thin-shell lies outside the event
horizon. For some reasons the cases d=5 and d>5 are treated separately. The
surface en... | [
{
"created": "Tue, 27 Jul 2010 06:11:43 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Aug 2010 16:16:19 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Jan 2011 15:58:40 GMT",
"version": "v3"
}
] | 2011-01-17 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
],
[
"Amirabi",
"Z.",
""
]
] | We present thin-shell wormhole solutions in Einstein-Yang-Mills-Gauss-Bonnet (EYMGB) theory in higher dimensions d\geq5. Exact black hole solutions are employed for this purpose where the radius of thin-shell lies outside the event horizon. For some reasons the cases d=5 and d>5 are treated separately. The surface ener... |
2009.04386 | Victor Santos | \'Angel Rinc\'on and Victor Santos | Greybody factor and quasinormal modes of Regular Black Holes | Accepted for publication in the European Physical Journal C (EPJ C) | null | 10.1140/epjc/s10052-020-08445-2 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this work, we investigate the quasinormal frequencies of a class of
regular black hole solutions which generalize Bardeen and Hayward spacetimes.
In particular, we analyze scalar, vector and gravitational perturbations of the
black hole both with the semianalytic WKB method and their time-domain
profiles. We analy... | [
{
"created": "Wed, 9 Sep 2020 16:08:53 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Rincón",
"Ángel",
""
],
[
"Santos",
"Victor",
""
]
] | In this work, we investigate the quasinormal frequencies of a class of regular black hole solutions which generalize Bardeen and Hayward spacetimes. In particular, we analyze scalar, vector and gravitational perturbations of the black hole both with the semianalytic WKB method and their time-domain profiles. We analyze... |
gr-qc/9503052 | Vivek Iyer | Vivek Iyer and Robert M. Wald | A comparison of Noether charge and Euclidean methods for Computing the
Entropy of Stationary Black Holes | 29 pages (double-spaced) latex | Phys.Rev. D52 (1995) 4430-4439 | 10.1103/PhysRevD.52.4430 | null | gr-qc hep-th | null | The entropy of stationary black holes has recently been calculated by a
number of different approaches. Here we compare the Noether charge approach
(defined for any diffeomorphism invariant Lagrangian theory) with various
Euclidean methods, specifically, (i) the microcanonical ensemble approach of
Brown and York, (ii... | [
{
"created": "Mon, 27 Mar 1995 20:25:29 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Iyer",
"Vivek",
""
],
[
"Wald",
"Robert M.",
""
]
] | The entropy of stationary black holes has recently been calculated by a number of different approaches. Here we compare the Noether charge approach (defined for any diffeomorphism invariant Lagrangian theory) with various Euclidean methods, specifically, (i) the microcanonical ensemble approach of Brown and York, (ii) ... |
1706.07764 | Federico Pasqualotto | Federico Pasqualotto | Nonlinear stability for the Maxwell-Born-Infeld system on a
Schwarzschild background | 116 pages, 5 figures | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove small data global existence for solutions to the
Maxwell-Born-Infeld (MBI) system on a fixed Schwarzschild background. This
system has appeared in the context of string theory and can be seen as a
nonlinear model problem for the stability of the background metric itself, due
to its tensorial an... | [
{
"created": "Fri, 23 Jun 2017 16:09:43 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Jul 2019 16:27:53 GMT",
"version": "v2"
}
] | 2019-07-16 | [
[
"Pasqualotto",
"Federico",
""
]
] | In this paper we prove small data global existence for solutions to the Maxwell-Born-Infeld (MBI) system on a fixed Schwarzschild background. This system has appeared in the context of string theory and can be seen as a nonlinear model problem for the stability of the background metric itself, due to its tensorial and ... |
2103.11235 | Carlos Maldonado Salazar | Carlos Maldonado and Fernando Mendez | Bi-metric Universe with Matter | null | Phys. Rev. D 103, 123505 (2021) | 10.1103/PhysRevD.103.123505 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the early stage of evolution of a universe with two scale factors
proposed in [1] when matter is present. The scale factors describe two causally
disconnected patches of the universe interacting trough a non-trivial Poisson
bracket structure in the momentum sector characterized by one parameter \kappa.
We ... | [
{
"created": "Sat, 20 Mar 2021 20:07:20 GMT",
"version": "v1"
}
] | 2021-06-09 | [
[
"Maldonado",
"Carlos",
""
],
[
"Mendez",
"Fernando",
""
]
] | We analyze the early stage of evolution of a universe with two scale factors proposed in [1] when matter is present. The scale factors describe two causally disconnected patches of the universe interacting trough a non-trivial Poisson bracket structure in the momentum sector characterized by one parameter \kappa. We st... |
2311.07279 | Tieguang Zi | Tieguang Zi, Peng-Cheng Li | Gravitational waves from extreme-mass-ratio inspirals in the
semiclassical gravity spacetime | 11 pages,7 figures,1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | More recently, Fernandes \cite{Fernandes:2023vux} discovered analytic
stationary and axially-symmetric black hole solutions within semiclassical
gravity, driven by the trace anomaly. The study unveils some distinctive
features of these solutions. In this paper, we compute the gravitational waves
emitted from the \ac{... | [
{
"created": "Mon, 13 Nov 2023 12:23:02 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Nov 2023 06:54:54 GMT",
"version": "v2"
}
] | 2023-11-30 | [
[
"Zi",
"Tieguang",
""
],
[
"Li",
"Peng-Cheng",
""
]
] | More recently, Fernandes \cite{Fernandes:2023vux} discovered analytic stationary and axially-symmetric black hole solutions within semiclassical gravity, driven by the trace anomaly. The study unveils some distinctive features of these solutions. In this paper, we compute the gravitational waves emitted from the \ac{EM... |
2111.10511 | Sanjay Mandal | Sanjay Mandal, P.K. Sahoo | Constraint on the equation of state parameter ($\omega$) in
non-minimally coupled $f(Q)$ gravity | PLB published version | Phys. Lett. B, vol 823 (2021) 136786 | 10.1016/j.physletb.2021.136786 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We study observational constraints on the modified symmetric teleparallel
gravity, the non-metricity $f(Q)$ gravity, which reproduces background
expansion of the universe. For this purpose, we use Hubble measurements,
Baryonic Acoustic Oscillations (BAO), 1048 Pantheon supernovae type Ia data
sample which integrate S... | [
{
"created": "Sat, 20 Nov 2021 03:55:32 GMT",
"version": "v1"
}
] | 2021-11-25 | [
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
]
] | We study observational constraints on the modified symmetric teleparallel gravity, the non-metricity $f(Q)$ gravity, which reproduces background expansion of the universe. For this purpose, we use Hubble measurements, Baryonic Acoustic Oscillations (BAO), 1048 Pantheon supernovae type Ia data sample which integrate Sup... |
2105.14679 | Philip D. Mannheim | Philip D. Mannheim | Structure of conformal gravity in the presence of a scale breaking
scalar field | 20 pages, 1 figure. Revised and shortened | null | 10.1007/s10714-022-02982-9 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the structure of conformal gravity in the presence of a c-number,
conformally coupled, long range, macroscopic scalar field. And in the static,
spherically symmetric case discuss two classes of exact exterior solutions, in
one of which the scalar field has a constant value and in the other, which is
due to... | [
{
"created": "Mon, 31 May 2021 02:40:59 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Nov 2021 00:56:38 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Jan 2022 16:04:24 GMT",
"version": "v3"
}
] | 2022-09-14 | [
[
"Mannheim",
"Philip D.",
""
]
] | We revisit the structure of conformal gravity in the presence of a c-number, conformally coupled, long range, macroscopic scalar field. And in the static, spherically symmetric case discuss two classes of exact exterior solutions, in one of which the scalar field has a constant value and in the other, which is due to B... |
1801.07289 | Jarrod Williams | J. A. Valiente Kroon and J. L. Williams | A perturbative approach to the construction of initial data on compact
manifolds | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the implementation, to the case of compact manifolds, of the
perturbative method of Friedrich-Butscher for the construction of solutions to
the vaccum Einstein constraint equations. This method is of a perturbative
nature and exploits the properties of the extended constraint equations ---a
larger system o... | [
{
"created": "Mon, 22 Jan 2018 19:37:32 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jun 2018 22:04:59 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Jun 2019 10:49:29 GMT",
"version": "v3"
}
] | 2019-06-18 | [
[
"Kroon",
"J. A. Valiente",
""
],
[
"Williams",
"J. L.",
""
]
] | We discuss the implementation, to the case of compact manifolds, of the perturbative method of Friedrich-Butscher for the construction of solutions to the vaccum Einstein constraint equations. This method is of a perturbative nature and exploits the properties of the extended constraint equations ---a larger system of ... |
1910.07506 | Francisco Jos\'e Maldonado Torralba | Jose Beltr\'an Jim\'enez and Francisco Jos\'e Maldonado Torralba | Revisiting the Stability of Quadratic Poincar\'e Gauge Gravity | 25 pages, 1 figure. More insight on the bi-scalar theory has been
added, including its possible extensions and the coupling with fermions. A
clarifying footnote on the Holst term has been introduced. Extended
discussion. It matches the version published in EPJC | Eur.Phys.J.C 80 (2020) 7, 611 | 10.1140/epjc/s10052-020-8163-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Poincar\'e gauge theories provide an approach to gravity based on the gauging
of the Poincar\'e group, whose homogeneous part generates curvature while the
translational sector gives rise to torsion. In this note we revisit the
stability of the widely studied quadratic theories within this framework. We
analyse the p... | [
{
"created": "Wed, 16 Oct 2019 17:48:15 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Dec 2020 10:24:41 GMT",
"version": "v2"
}
] | 2020-12-16 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Torralba",
"Francisco José Maldonado",
""
]
] | Poincar\'e gauge theories provide an approach to gravity based on the gauging of the Poincar\'e group, whose homogeneous part generates curvature while the translational sector gives rise to torsion. In this note we revisit the stability of the widely studied quadratic theories within this framework. We analyse the pre... |
2003.13434 | Sebasti\'an Bahamonde Dr | Sebastian Bahamonde, Mihai Marciu, Sergei D. Odintsov, Prabir Rudra | String-inspired Teleparallel Cosmology | 18 pages. Matches published version in NPB | Nucl.Phys. B 962 (2020), 115238 | 10.1016/j.nuclphysb.2020.115238 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper represents an attempt for a very generic string inspired
theory of gravitation, based on a stringy action in the teleparallel gravity
which includes a specific functional which depends on the scalar field and its
kinetic energy, as well as the torsion and boundary terms, embedding also
possible effe... | [
{
"created": "Mon, 30 Mar 2020 13:01:00 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Mar 2020 15:47:36 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Nov 2020 22:44:31 GMT",
"version": "v3"
}
] | 2020-11-26 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Marciu",
"Mihai",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Rudra",
"Prabir",
""
]
] | The present paper represents an attempt for a very generic string inspired theory of gravitation, based on a stringy action in the teleparallel gravity which includes a specific functional which depends on the scalar field and its kinetic energy, as well as the torsion and boundary terms, embedding also possible effect... |
2307.11051 | Alvaro Duenas-Vidal | \'Alvaro Duenas-Vidal, Jorge Segovia | Quantum dynamics for massless particles in Brinkmann spacetimes | 29 pages, 2 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In Classical Dynamics, Eisenhart lift connects the dynamics of null geodesics
in a Brinkmann spacetime with a continuous family of Hamiltonian systems by
means of a suitable projection. In this work we explore the possibility of
building a model for quantum dynamics of massless particles propagating inside
a Brinkman... | [
{
"created": "Thu, 20 Jul 2023 17:32:02 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"Duenas-Vidal",
"Álvaro",
""
],
[
"Segovia",
"Jorge",
""
]
] | In Classical Dynamics, Eisenhart lift connects the dynamics of null geodesics in a Brinkmann spacetime with a continuous family of Hamiltonian systems by means of a suitable projection. In this work we explore the possibility of building a model for quantum dynamics of massless particles propagating inside a Brinkmann ... |
1004.3035 | Sanjay Jhingan | S. Jhingan, I. H. Dwivedi and S. Barve | Depletion of energy from Naked Singular regions during gravitational
collapse | 5 pages, 1 EPS figure, revised version accepted for publication in
PRD | Phys.Rev.D84:024001,2011 | 10.1103/PhysRevD.84.024001 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A distinguishable and observable physical property of Naked Singular Regions
of the spacetime formed during a gravitational collapse has important
implications for both experimental and theoretical relativity. We examine here
whether energy can escape physically from naked singular regions to reach
either a local or ... | [
{
"created": "Sun, 18 Apr 2010 16:02:20 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2011 16:43:33 GMT",
"version": "v2"
}
] | 2011-08-08 | [
[
"Jhingan",
"S.",
""
],
[
"Dwivedi",
"I. H.",
""
],
[
"Barve",
"S.",
""
]
] | A distinguishable and observable physical property of Naked Singular Regions of the spacetime formed during a gravitational collapse has important implications for both experimental and theoretical relativity. We examine here whether energy can escape physically from naked singular regions to reach either a local or a ... |
2311.14569 | Vesselin G. Gueorguiev | Vesselin G. Gueorguiev and Andre Maeder | The Scale Invariant Vacuum Paradigm: Main Results and Current Progress
Review (Part II) | 27 pages, 7 figures, 2 tables | Symmetry 2024, 16 (6), 657 | 10.3390/sym16060657 | null | gr-qc astro-ph.CO astro-ph.GA physics.plasm-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a summary of the main results within the Scale Invariant Vacuum
(SIV) paradigm based on the Weyl Integrable Geometry (WIG) as an extension to
the standard Einstein General Relativity (EGR). After a brief review of the
mathematical framework, where we also highlight the connection between the
weak-field SIV... | [
{
"created": "Fri, 24 Nov 2023 15:58:30 GMT",
"version": "v1"
}
] | 2024-06-03 | [
[
"Gueorguiev",
"Vesselin G.",
""
],
[
"Maeder",
"Andre",
""
]
] | We present a summary of the main results within the Scale Invariant Vacuum (SIV) paradigm based on the Weyl Integrable Geometry (WIG) as an extension to the standard Einstein General Relativity (EGR). After a brief review of the mathematical framework, where we also highlight the connection between the weak-field SIV e... |
2302.12352 | Jose Miguel Ladino | Jose Miguel Ladino, Carlos Andr\'es del Valle and Eduard Larra\~naga | Motion of Spinning Particles around Black Holes | 14 pages, 2 figures | A Guide to Black Holes, ed. by Kenath Arun (Nova Science
Publishers, New York, 2022), pp. 79-96 | 10.52305/JOLT6397 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of spinning particles around compact objects, for example a
rotating stellar object moving around a supermassive black hole, is described
by differential equations that are, in general, non-integrable. In this work,
we present a computational code that integrates the equations of motion of a
spinning parti... | [
{
"created": "Thu, 23 Feb 2023 22:15:39 GMT",
"version": "v1"
}
] | 2023-02-27 | [
[
"Ladino",
"Jose Miguel",
""
],
[
"del Valle",
"Carlos Andrés",
""
],
[
"Larrañaga",
"Eduard",
""
]
] | The motion of spinning particles around compact objects, for example a rotating stellar object moving around a supermassive black hole, is described by differential equations that are, in general, non-integrable. In this work, we present a computational code that integrates the equations of motion of a spinning particl... |
2109.02947 | Spiros Cotsakis | Spiros Cotsakis | Primordial synchronization of Mixmaster spatial points | 6 pages, uses special world scientific style; invited talk in the
16th Marcel-Grossmann virtual Conference, parallel session EU2 | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent work on the possibility of primordial synchronization of
different Mixmaster regions in generic inhomogeneous spacetime. It is shown
that inhomogeneous domains undergoing chaotic oscillations may synchronize
themselves exponentially fast and proceed in perfect symphony asymptotically in
the past dire... | [
{
"created": "Tue, 7 Sep 2021 09:03:38 GMT",
"version": "v1"
}
] | 2021-09-08 | [
[
"Cotsakis",
"Spiros",
""
]
] | We review recent work on the possibility of primordial synchronization of different Mixmaster regions in generic inhomogeneous spacetime. It is shown that inhomogeneous domains undergoing chaotic oscillations may synchronize themselves exponentially fast and proceed in perfect symphony asymptotically in the past direct... |
gr-qc/9403024 | Luis Oxman | M. Kruczenski, L.E. Oxman and M. Zaldarriaga | Large Squeezing Behavior of Cosmological Entropy Generation | 19 pages (LaTeX) | Class.Quant.Grav.11:2317-2330,1994 | 10.1088/0264-9381/11/9/013 | null | gr-qc | null | We consider the generation of entropy when particle pairs are created at a
cosmological level. Making a reduction via the particle number basis, we
compute the classical limit for the entropy generation due to the evolution of
the matter field fluctuations (squeeze transformation), obtaining that it is
linear in the ... | [
{
"created": "Fri, 11 Mar 1994 21:40:06 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Kruczenski",
"M.",
""
],
[
"Oxman",
"L. E.",
""
],
[
"Zaldarriaga",
"M.",
""
]
] | We consider the generation of entropy when particle pairs are created at a cosmological level. Making a reduction via the particle number basis, we compute the classical limit for the entropy generation due to the evolution of the matter field fluctuations (squeeze transformation), obtaining that it is linear in the sq... |
2301.02930 | Dongxue Qu | Muxin Han, Hongguang Liu, Dongxue Qu | Complex critical points in Lorentzian spinfoam quantum gravity:
4-simplex amplitude and effective dynamics on double-$\Delta_3$ complex | 29 pages, 15 figures | null | 10.1103/PhysRevD.108.026010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complex critical points are analyzed in the 4-dimensional Lorentzian
Engle-Pereira-Rovelli-Livine (EPRL) spinfoam model in the large-$j$ regime. For
the 4-simplex amplitude, taking into account the complex critical point
generalizes the large-$j$ asymptotics to the situation with non-Regge boundary
data and relat... | [
{
"created": "Sat, 7 Jan 2023 20:16:37 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2023 17:11:53 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Jul 2023 03:24:34 GMT",
"version": "v3"
}
] | 2023-08-02 | [
[
"Han",
"Muxin",
""
],
[
"Liu",
"Hongguang",
""
],
[
"Qu",
"Dongxue",
""
]
] | The complex critical points are analyzed in the 4-dimensional Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam model in the large-$j$ regime. For the 4-simplex amplitude, taking into account the complex critical point generalizes the large-$j$ asymptotics to the situation with non-Regge boundary data and relates... |
2102.11547 | Rainer Verch | Fiona Kurpicz, Nicola Pinamonti, Rainer Verch | Temperature and entropy-area relation of quantum matter near spherically
symmetric outer trapping horizons | latex2e, 44 pages, 1 Figure. v2: Typos removed, minor errors
corrected, references added. This version matches the journal publication in
Lett. Math. Phys. up to formatting | Letters in Mathematical Physics 111 (2021) No 110 (open access) | 10.1007/s11005-021-01445-7 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We consider spherically symmetric spacetimes with an outer trapping horizon.
Such spacetimes are generalizations of spherically symmetric black hole
spacetimes where the central mass can vary with time, like in black hole
collapse or black hole evaporation. These spacetimes possess in general no
timelike Killing vect... | [
{
"created": "Tue, 23 Feb 2021 08:30:10 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Aug 2021 15:55:19 GMT",
"version": "v2"
}
] | 2021-08-17 | [
[
"Kurpicz",
"Fiona",
""
],
[
"Pinamonti",
"Nicola",
""
],
[
"Verch",
"Rainer",
""
]
] | We consider spherically symmetric spacetimes with an outer trapping horizon. Such spacetimes are generalizations of spherically symmetric black hole spacetimes where the central mass can vary with time, like in black hole collapse or black hole evaporation. These spacetimes possess in general no timelike Killing vector... |
1201.1590 | Jan Ambjorn | J. Ambjorn, A. T. Goerlich, J. Jurkiewicz and H.-G. Zhang | Pseudo-topological transitions in 2D gravity models coupled to massless
scalar fields | 19 pages, many figures | null | 10.1016/j.nuclphysb.2012.05.024 | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometries generated by two-dimensional causal dynamical
triangulations (CDT) coupled to $d$ massless scalar fields. Using methods
similar to those used to study four-dimensional CDT we show that there exists a
$c=1$ "barrier", analogous to the $c=1$ barrier encountered in non-critical
string theory, onl... | [
{
"created": "Sat, 7 Jan 2012 23:50:01 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Ambjorn",
"J.",
""
],
[
"Goerlich",
"A. T.",
""
],
[
"Jurkiewicz",
"J.",
""
],
[
"Zhang",
"H. -G.",
""
]
] | We study the geometries generated by two-dimensional causal dynamical triangulations (CDT) coupled to $d$ massless scalar fields. Using methods similar to those used to study four-dimensional CDT we show that there exists a $c=1$ "barrier", analogous to the $c=1$ barrier encountered in non-critical string theory, only ... |
1911.00372 | Hemwati Nandan | Prateek Sharma, Hemwati Nandan, Radouane Gannouji, Rashmi Uniyal and
Amare Abebe | Deflection of Light by a Rotating Black Hole Surrounded by
"Quintessence" | null | International Journal of Modern Physics A (2020) 2050155 | 10.1142/S0217751X20501559 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a detailed analysis of a rotating black hole surrounded by
"quintessence". This solution represents a fluid with a constant equation of
state, $w$, which can for example describe an effective warm dark matter fluid
around a black hole. We clarify the conditions for the existence of such a
solution and stud... | [
{
"created": "Fri, 1 Nov 2019 13:37:51 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Oct 2020 09:48:14 GMT",
"version": "v2"
}
] | 2020-10-06 | [
[
"Sharma",
"Prateek",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Gannouji",
"Radouane",
""
],
[
"Uniyal",
"Rashmi",
""
],
[
"Abebe",
"Amare",
""
]
] | We present a detailed analysis of a rotating black hole surrounded by "quintessence". This solution represents a fluid with a constant equation of state, $w$, which can for example describe an effective warm dark matter fluid around a black hole. We clarify the conditions for the existence of such a solution and study ... |
1502.04907 | Gabriel Bengochea | Gabriel Leon, Gabriel R. Bengochea | Emergence of inflationary perturbations in the CSL model | 14 pages. Final version. To be published in EPJC | Eur. Phys. J. C 76 (2016) 29 | 10.1140/epjc/s10052-015-3860-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inflationary paradigm is the most successful model that explains the
observed spectrum of primordial perturbations. However, the precise emergence
of such inhomogeneities and the quantum-to-classical transition of the
perturbations has not yet reached a consensus among the community. The
Continuous Spontaneous Lo... | [
{
"created": "Tue, 17 Feb 2015 14:40:47 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Oct 2015 19:16:19 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Jan 2016 14:43:52 GMT",
"version": "v3"
}
] | 2016-01-26 | [
[
"Leon",
"Gabriel",
""
],
[
"Bengochea",
"Gabriel R.",
""
]
] | The inflationary paradigm is the most successful model that explains the observed spectrum of primordial perturbations. However, the precise emergence of such inhomogeneities and the quantum-to-classical transition of the perturbations has not yet reached a consensus among the community. The Continuous Spontaneous Loca... |
1012.3090 | Shrirang S. Deshingkar | Shrirang S. Deshingkar | On physical insignificance of null naked singularities | 11 pages, 1 figure | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study collapse of a general matter in a most general
spacetime i.e., a spacetime with any matter and without (assuming) any
symmetry. We show that the energy is completely trapped inside the null
singularity and therefore they cannot be experimentally observed. This most
general result implies, there ... | [
{
"created": "Tue, 14 Dec 2010 16:54:29 GMT",
"version": "v1"
}
] | 2010-12-15 | [
[
"Deshingkar",
"Shrirang S.",
""
]
] | In this work we study collapse of a general matter in a most general spacetime i.e., a spacetime with any matter and without (assuming) any symmetry. We show that the energy is completely trapped inside the null singularity and therefore they cannot be experimentally observed. This most general result implies, there is... |
1106.6269 | Alexey Krugly | Alexey L. Krugly | Discrete mechanics: a sequential growth dynamics for causal sets that is
based on binary alternatives | 23 pages, 13 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of approaches to quantum gravity is different models of a discrete
pregeometry. An example of a discrete pregeometry on a microscopic scale is
introduced. This is the particular case of a causal set. The causal set is a
locally finite partially ordered set. The dynamics of this model is a
stochastic sequential gr... | [
{
"created": "Wed, 11 May 2011 06:14:54 GMT",
"version": "v1"
}
] | 2011-07-01 | [
[
"Krugly",
"Alexey L.",
""
]
] | One of approaches to quantum gravity is different models of a discrete pregeometry. An example of a discrete pregeometry on a microscopic scale is introduced. This is the particular case of a causal set. The causal set is a locally finite partially ordered set. The dynamics of this model is a stochastic sequential grow... |
2309.07952 | Sebastian Baum | Sebastian Baum, Zachary Bogorad, Peter W. Graham | Gravitational Wave Measurement in the Mid-Band with Atom Interferometers | 45+15 pages, many figures. Code available at
github.com/sbaum90/AIMforGW. v2: updated to match the published version | JCAP05(2024)027 | 10.1088/1475-7516/2024/05/027 | TTK-23-24 | gr-qc astro-ph.CO astro-ph.IM hep-ph physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational Waves (GWs) have been detected in the $\sim$100 Hz and nHz
bands, but most of the gravitational spectrum remains unobserved. A variety of
detector concepts have been proposed to expand the range of observable
frequencies. In this work, we study the capability of GW detectors in the
``mid-band'', the $\s... | [
{
"created": "Thu, 14 Sep 2023 18:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 May 2024 15:25:33 GMT",
"version": "v2"
}
] | 2024-05-03 | [
[
"Baum",
"Sebastian",
""
],
[
"Bogorad",
"Zachary",
""
],
[
"Graham",
"Peter W.",
""
]
] | Gravitational Waves (GWs) have been detected in the $\sim$100 Hz and nHz bands, but most of the gravitational spectrum remains unobserved. A variety of detector concepts have been proposed to expand the range of observable frequencies. In this work, we study the capability of GW detectors in the ``mid-band'', the $\sim... |
1403.7756 | Michael Coughlin | Michael Coughlin, Jan Harms, Nelson Christensen, Vladimir Dergachev,
Riccardo DeSalvo, Shivaraj Kandhasamy, Vuk Mandic | Wiener filtering with a seismic underground array at the Sanford
Underground Research Facility | null | null | 10.1088/0264-9381/31/21/215003 | null | gr-qc astro-ph.IM physics.geo-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A seismic array has been deployed at the Sanford Underground Research
Facility in the former Homestake mine, South Dakota, to study the underground
seismic environment. This includes exploring the advantages of constructing a
third-generation gravitational-wave detector underground. A major noise source
for these det... | [
{
"created": "Sun, 30 Mar 2014 13:29:33 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jun 2014 09:31:44 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Aug 2014 20:38:53 GMT",
"version": "v3"
}
] | 2015-06-19 | [
[
"Coughlin",
"Michael",
""
],
[
"Harms",
"Jan",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Dergachev",
"Vladimir",
""
],
[
"DeSalvo",
"Riccardo",
""
],
[
"Kandhasamy",
"Shivaraj",
""
],
[
"Mandic",
"Vuk",
""
... | A seismic array has been deployed at the Sanford Underground Research Facility in the former Homestake mine, South Dakota, to study the underground seismic environment. This includes exploring the advantages of constructing a third-generation gravitational-wave detector underground. A major noise source for these detec... |
2108.10185 | Malsawmtluangi N | N. Malsawmtluangi | Analytical study of classic models of Hybrid Inflation | 10 pages, 10 figures | J. Phys. Commun. 5 (2021) 085016 | 10.1088/2399-6528/ac1f75 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We study the classic hybrid inflation model in its original and modified
forms and show the shape of the inflationary potentials and analyze the amount
of primordial gravitational waves each model predicts. We compare the resulting
EE-mode and BB-mode power spectrum with the data from the joint BICEP2/Keck and
Planck... | [
{
"created": "Fri, 20 Aug 2021 08:18:56 GMT",
"version": "v1"
}
] | 2021-09-01 | [
[
"Malsawmtluangi",
"N.",
""
]
] | We study the classic hybrid inflation model in its original and modified forms and show the shape of the inflationary potentials and analyze the amount of primordial gravitational waves each model predicts. We compare the resulting EE-mode and BB-mode power spectrum with the data from the joint BICEP2/Keck and Planck c... |
gr-qc/0007057 | Lorenzo Iorio | Lorenzo Iorio | Satellite non-gravitational orbital perturbations and the detection of
the gravitomagnetic clock effect | LaTex2e, 12 pages, no figures, no tables. Reference added | Class.Quant.Grav.18:4303-4310,2001 | 10.1088/0264-9381/18/20/309 | null | gr-qc astro-ph physics.geo-ph physics.space-ph | null | The general relativistic gravitomagnetic clock effect consists in the fact
that two massive test bodies orbiting a central spinning mass in its equatorial
plane along two identical circular trajectories, but in opposite directions,
take different times in describing a full revolution with respect to an
asymptotically... | [
{
"created": "Fri, 21 Jul 2000 16:23:39 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2001 15:46:10 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Jul 2001 23:30:15 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Aug 2001 14:11:40 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | The general relativistic gravitomagnetic clock effect consists in the fact that two massive test bodies orbiting a central spinning mass in its equatorial plane along two identical circular trajectories, but in opposite directions, take different times in describing a full revolution with respect to an asymptotically i... |
2206.08608 | Zi-Yu Tang | Zi-Yu Tang, Xiao-Mei Kuang, Bin Wang, and Wei-Liang Qian | The length of a compact extra dimension from black hole shadow | 4 pages, 2 figures, to be published in Science Bulletin as a short
communication | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Plenty of efforts have been made to explore the black string and its
instability, but the fate of the black strings with fewer extra dimensions is
still inconclusive. Now starting from the 5D uniform black string, we show that
the EHT observations of M87* and SgrA* can not only rule out the black string
with an infin... | [
{
"created": "Fri, 17 Jun 2022 08:08:37 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2022 09:56:56 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Nov 2022 08:57:05 GMT",
"version": "v3"
}
] | 2022-11-11 | [
[
"Tang",
"Zi-Yu",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wang",
"Bin",
""
],
[
"Qian",
"Wei-Liang",
""
]
] | Plenty of efforts have been made to explore the black string and its instability, but the fate of the black strings with fewer extra dimensions is still inconclusive. Now starting from the 5D uniform black string, we show that the EHT observations of M87* and SgrA* can not only rule out the black string with an infinit... |
1510.08159 | Aaron Zimmerman | Aaron Zimmerman, Huan Yang, Fan Zhang, David A. Nichols, Emanuele
Berti, Yanbei Chen | Reply to "On the branching of quasinormal resonances of near-extremal
Kerr black holes" by Shahar Hod | 4 pages, 3 figures, reply to arXiv:1510.05604 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a study of the quasinormal mode frequencies of nearly extremal black
holes, we pointed out a bifurcation of the mode spectrum into modes with finite
decay and modes with vanishing decay in the extremal limit. We provided
analytic and semi-analytic results identifying which families of modes
bifurcated, and when mo... | [
{
"created": "Wed, 28 Oct 2015 01:51:20 GMT",
"version": "v1"
}
] | 2015-10-29 | [
[
"Zimmerman",
"Aaron",
""
],
[
"Yang",
"Huan",
""
],
[
"Zhang",
"Fan",
""
],
[
"Nichols",
"David A.",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Chen",
"Yanbei",
""
]
] | In a study of the quasinormal mode frequencies of nearly extremal black holes, we pointed out a bifurcation of the mode spectrum into modes with finite decay and modes with vanishing decay in the extremal limit. We provided analytic and semi-analytic results identifying which families of modes bifurcated, and when mode... |
gr-qc/0505057 | Martin Bojowald | Martin Bojowald | Elements of Loop Quantum Cosmology | 30 pages, 4 figures, Chapter contributed to "100 Years of Relativity
- Space-time Structure: Einstein and Beyond", Ed. A. Ashtekar (World
Scientific) | null | null | AEI-2005-025 | gr-qc astro-ph hep-th | null | The expansion of our universe, when followed backward in time, implies that
it emerged from a phase of huge density, the big bang. These stages are so
extreme that classical general relativity combined with matter theories is not
able to describe them properly, and one has to refer to quantum gravity. A
complete quan... | [
{
"created": "Thu, 12 May 2005 08:50:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bojowald",
"Martin",
""
]
] | The expansion of our universe, when followed backward in time, implies that it emerged from a phase of huge density, the big bang. These stages are so extreme that classical general relativity combined with matter theories is not able to describe them properly, and one has to refer to quantum gravity. A complete quanti... |
1607.02736 | Suprit Singh | Suprit Singh | From Quantum to Classical in the Sky | Contribution to the Festschrift in honor of Prof. T. Padmanabhan on
the occassion of his 60th birthday. Extending the results of arXiv:1308.4976
to tensor perturbations. Title from my poster presented at ICTP Summer School
on Cosmology, June 2016 | Fundam.Theor.Phys. 187 (2017) pp 397-409 | 10.1007/978-3-319-51700-1_24 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflation has by-far set itself as one of the prime ideas in the current
cosmological models that seemingly has an answer for every observed phenomenon
in cosmology. More importantly, it serves as a bridge between the early quantum
fluctuations and the present-day classical structures. Although the transition
from qu... | [
{
"created": "Sun, 10 Jul 2016 12:04:50 GMT",
"version": "v1"
}
] | 2017-04-18 | [
[
"Singh",
"Suprit",
""
]
] | Inflation has by-far set itself as one of the prime ideas in the current cosmological models that seemingly has an answer for every observed phenomenon in cosmology. More importantly, it serves as a bridge between the early quantum fluctuations and the present-day classical structures. Although the transition from quan... |
1205.1427 | Claus Gerhardt | Claus Gerhardt | The quantization of gravity in globally hyperbolic spacetimes | 26 pages, v4: some minor typos corrected, to appear in ATMP 2013 | Adv. Theor. Math. Phys. 17 (6), 1347 - 1391 (2013) | 10.4310/ATMP.2013.v17.n6.a5 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the ADM approach to obtain a Hamiltonian description of the
Einstein-Hilbert action. In doing so we add four new ingredients: (i) We
eliminate the diffeomorphism constraints. (ii) We replace the densities $\sqrt
g$ by a function $\f(x,g_{ij})$ with the help of a fixed metric $\chi$ such
that the Lagrangian a... | [
{
"created": "Mon, 7 May 2012 15:22:48 GMT",
"version": "v1"
},
{
"created": "Thu, 17 May 2012 17:50:01 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Jun 2012 13:33:13 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Feb 2013 19:38:48 GMT",
"version": "v4"
}
] | 2014-05-01 | [
[
"Gerhardt",
"Claus",
""
]
] | We apply the ADM approach to obtain a Hamiltonian description of the Einstein-Hilbert action. In doing so we add four new ingredients: (i) We eliminate the diffeomorphism constraints. (ii) We replace the densities $\sqrt g$ by a function $\f(x,g_{ij})$ with the help of a fixed metric $\chi$ such that the Lagrangian and... |
1302.6956 | Jong-Ping Hsu | Jong-Ping Hsu | Experimental Tests on Yang-Mills Gravity with Accurate Measurements of
the Deflection of Light | 7 pages. To be published in The European Physical Journal - Plus
(2013) | Eur. Phys. J. Plus (2013) 128: 31 | 10.1140/epjp/i2013-133031-3 | null | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the geometric-optics limit, Yang-Mills gravity with space-time
translational gauge symmetry predicts $\D \phi =7Gm/(2R) \approx 1.53''$ for
the deflection of a light ray by the sun. The result, which is about 12%
smaller than that in the conventional theory, is consistent with experiments
involving optical frequen... | [
{
"created": "Wed, 27 Feb 2013 18:50:59 GMT",
"version": "v1"
}
] | 2014-02-26 | [
[
"Hsu",
"Jong-Ping",
""
]
] | In the geometric-optics limit, Yang-Mills gravity with space-time translational gauge symmetry predicts $\D \phi =7Gm/(2R) \approx 1.53''$ for the deflection of a light ray by the sun. The result, which is about 12% smaller than that in the conventional theory, is consistent with experiments involving optical frequenci... |
1701.06668 | Eavan Gleeson | Eavan Gleeson | Linear Instability of the Reissner-Nordstr\"om Cauchy Horizon | Submitted as MSc thesis, University of Cambridge, 2016 | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work studies solutions of the scalar wave equation \[\Box_g\phi=0\] on a
fixed subextremal Reissner-Nordstr\"{o}m spacetime with non-vanishing charge
$q$ and mass $M$. In a recent paper, Luk and Oh established that generic smooth
and compactly supported initial data on a Cauchy hypersurface lead to solutions
whi... | [
{
"created": "Mon, 23 Jan 2017 22:57:46 GMT",
"version": "v1"
}
] | 2017-01-25 | [
[
"Gleeson",
"Eavan",
""
]
] | This work studies solutions of the scalar wave equation \[\Box_g\phi=0\] on a fixed subextremal Reissner-Nordstr\"{o}m spacetime with non-vanishing charge $q$ and mass $M$. In a recent paper, Luk and Oh established that generic smooth and compactly supported initial data on a Cauchy hypersurface lead to solutions which... |
gr-qc/9602020 | Victor Berezin | V.A.Berezin | Quantum Black Hole Model and Hawking's Radiation | LaTeX file | Phys.Rev.D55:2139-2151,1997 | 10.1103/PhysRevD.55.2139 | Preprint INR-0916/Febr 1996 | gr-qc | null | The black hole model with a self-gravitating charged spherical symmetric dust
thin shell as a source is considered. The Schroedinger-type equation for such a
model is derived. This equation appeared to be a finite differences equation. A
theory of such an equation is developed and general solution is found and
invest... | [
{
"created": "Mon, 12 Feb 1996 12:03:06 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Berezin",
"V. A.",
""
]
] | The black hole model with a self-gravitating charged spherical symmetric dust thin shell as a source is considered. The Schroedinger-type equation for such a model is derived. This equation appeared to be a finite differences equation. A theory of such an equation is developed and general solution is found and investig... |
gr-qc/9603034 | Fodor Gyula | G. Fodor, K. Nakamura, Y. Oshiro and A. Tomimatsu | Surface gravity in dynamical spherically symmetric spacetimes | 35 pages, revtex, 3 figures included using epsf | Phys.Rev.D54:3882-3891,1996 | 10.1103/PhysRevD.54.3882 | DPNU-96-20 | gr-qc | null | A definition of surface gravity at the apparent horizon of dynamical
spherically symmetric spacetimes is proposed. It is based on a unique foliation
by ingoing null hypersurfaces. The function parametrizing the hypersurfaces can
be interpreted as the phase of a light wave uniformly emitted by some far-away
static obs... | [
{
"created": "Fri, 22 Mar 1996 07:54:48 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Fodor",
"G.",
""
],
[
"Nakamura",
"K.",
""
],
[
"Oshiro",
"Y.",
""
],
[
"Tomimatsu",
"A.",
""
]
] | A definition of surface gravity at the apparent horizon of dynamical spherically symmetric spacetimes is proposed. It is based on a unique foliation by ingoing null hypersurfaces. The function parametrizing the hypersurfaces can be interpreted as the phase of a light wave uniformly emitted by some far-away static obser... |
gr-qc/9705019 | Thomas Thiemann | Thomas Thiemann | QSD V : Quantum Gravity as the Natural Regulator of Matter Quantum Field
Theories | 34p, LATEX | Class.Quant.Grav. 15 (1998) 1281-1314 | 10.1088/0264-9381/15/5/012 | HUTMP-96/B-357 | gr-qc hep-th | null | It is an old speculation in physics that, once the gravitational field is
successfully quantized, it should serve as the natural regulator of infrared
and ultraviolet singularities that plague quantum field theories in a
background metric. We demonstrate that this idea is implemented in a precise
sense within the fra... | [
{
"created": "Sat, 10 May 1997 00:14:50 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Thiemann",
"Thomas",
""
]
] | It is an old speculation in physics that, once the gravitational field is successfully quantized, it should serve as the natural regulator of infrared and ultraviolet singularities that plague quantum field theories in a background metric. We demonstrate that this idea is implemented in a precise sense within the frame... |
0709.0539 | David Mattingly | David Mattingly | Causal sets and conservation laws in tests of Lorentz symmetry | 8 pages, matches version published in PRD | Phys.Rev.D77:125021,2008 | 10.1103/PhysRevD.77.125021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many of the most important astrophysical tests of Lorentz symmetry also
assume that energy-momentum of the observed particles is exactly conserved. In
the causal set approach to quantum gravity a particular kind of Lorentz
symmetry holds but energy-momentum conservation may be violated. We show that
incorrectly assum... | [
{
"created": "Tue, 4 Sep 2007 20:32:55 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 2008 01:14:00 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mattingly",
"David",
""
]
] | Many of the most important astrophysical tests of Lorentz symmetry also assume that energy-momentum of the observed particles is exactly conserved. In the causal set approach to quantum gravity a particular kind of Lorentz symmetry holds but energy-momentum conservation may be violated. We show that incorrectly assumin... |
2008.13425 | Parthasarathi Majumdar | Parthasarathi Majumdar and Anarya Ray | Holographic Bound on Area of Compact Binary Merger Remnant | 8 pages Revtex with three figures in .png format | Phys. Rev. D 104, 044036 (2021) | 10.1103/PhysRevD.104.044036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using concomitantly the Generalized Second Law of black hole thermodynamics
and the holographic Bekenstein entropy bound embellished by Loop Quantum
Gravity corrections to quantum black hole entropy, we show that the boundary
cross sectional area of the postmerger remnant formed from the compact binary
merger in grav... | [
{
"created": "Mon, 31 Aug 2020 08:31:45 GMT",
"version": "v1"
},
{
"created": "Mon, 3 May 2021 10:50:10 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"Majumdar",
"Parthasarathi",
""
],
[
"Ray",
"Anarya",
""
]
] | Using concomitantly the Generalized Second Law of black hole thermodynamics and the holographic Bekenstein entropy bound embellished by Loop Quantum Gravity corrections to quantum black hole entropy, we show that the boundary cross sectional area of the postmerger remnant formed from the compact binary merger in gravit... |
1802.03502 | Xun Xue | Jiayin Shen and Xun Xue | Large Scale Lorentz Violation Gravity and Dark Energy | 13 pages,6 figures,1 table | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The accelerating expansion of universe can be described by the non-zero
cosmological constant or the dark energy. However, the origin of the dark
energy remains a mystery of modern physics. The local Lorentz invariance is the
most exact symmetry of the Nature on the one hand, but all quantum gravity
theories predict ... | [
{
"created": "Sat, 10 Feb 2018 02:13:42 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Feb 2018 17:32:46 GMT",
"version": "v2"
},
{
"created": "Sat, 13 Oct 2018 17:37:54 GMT",
"version": "v3"
}
] | 2018-10-16 | [
[
"Shen",
"Jiayin",
""
],
[
"Xue",
"Xun",
""
]
] | The accelerating expansion of universe can be described by the non-zero cosmological constant or the dark energy. However, the origin of the dark energy remains a mystery of modern physics. The local Lorentz invariance is the most exact symmetry of the Nature on the one hand, but all quantum gravity theories predict Lo... |
1004.2734 | Matt Visser | Bethan Cropp (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | General polarization modes for the Rosen gravitational wave | V1: 12 pages, no figures. V2: still 12 pages, reformatted. Minor
technical edits, discussion of Riemann tensor added, two references added, no
significant physics changes. This version accepted for publication in
Classical and Quantum Gravity | Class.Quant.Grav.27:165022,2010 | 10.1088/0264-9381/27/16/165022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong-field gravitational plane waves are often represented in either the
Rosen or Brinkmann forms. While these two metric ansatze are related by a
coordinate transformation, so that they should describe essentially the same
physics, they rather puzzlingly seem to treat polarization states quite
differently. Both an... | [
{
"created": "Thu, 15 Apr 2010 23:07:32 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2010 23:38:40 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Cropp",
"Bethan",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Strong-field gravitational plane waves are often represented in either the Rosen or Brinkmann forms. While these two metric ansatze are related by a coordinate transformation, so that they should describe essentially the same physics, they rather puzzlingly seem to treat polarization states quite differently. Both ansa... |
1906.11779 | Oscar Lasso Andino | Marcos Arga\~naraz and Oscar Lasso Andino | Dynamics in wormhole spacetimes: a Jacobi metric approach | null | Class. Quantum Grav. 38 045004 (2021) | 10.1088/1361-6382/abcf86 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article deals with the study of the dynamics of particles in different
wormhole geometries. Using the Jacobi metric approach we study the geodesic
motion on the Morris-Thorne wormhole. We found the only stable circular orbit
located at the throat. We show that the Gaussian curvature of the Jacobi metric
is direc... | [
{
"created": "Thu, 27 Jun 2019 16:39:00 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Oct 2019 17:25:48 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Dec 2020 19:18:22 GMT",
"version": "v3"
}
] | 2021-01-01 | [
[
"Argañaraz",
"Marcos",
""
],
[
"Andino",
"Oscar Lasso",
""
]
] | This article deals with the study of the dynamics of particles in different wormhole geometries. Using the Jacobi metric approach we study the geodesic motion on the Morris-Thorne wormhole. We found the only stable circular orbit located at the throat. We show that the Gaussian curvature of the Jacobi metric is directl... |
1609.05915 | M\'arton T\'apai | M\'arton T\'apai, Zolt\'an Keresztes, L\'aszl\'o \'Arp\'ad Gergely | Secular precessing compact binary dynamics, spin and orbital angular
momentum flip-flops | 24 pages, 10 figure panels, figure resolution downscaled for arXiv
version, LIGO document P1600207 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the conservative secular evolution of precessing compact binaries
to second post-Newtonian order accuracy, with leading-order spin-orbit,
spin-spin and mass quadrupole-monopole contributions included. The emerging
closed system of first-order differential equations evolves the pairs of polar
and azimuthal a... | [
{
"created": "Mon, 19 Sep 2016 20:01:04 GMT",
"version": "v1"
}
] | 2016-09-21 | [
[
"Tápai",
"Márton",
""
],
[
"Keresztes",
"Zoltán",
""
],
[
"Gergely",
"László Árpád",
""
]
] | We derive the conservative secular evolution of precessing compact binaries to second post-Newtonian order accuracy, with leading-order spin-orbit, spin-spin and mass quadrupole-monopole contributions included. The emerging closed system of first-order differential equations evolves the pairs of polar and azimuthal ang... |
2004.08362 | Pedro Fernandes | Pedro G. S. Fernandes, Pedro Carrilho, Timothy Clifton, David J.
Mulryne | Derivation of Regularized Field Equations for the Einstein-Gauss-Bonnet
Theory in Four Dimensions | 6 pages + 2 pages with references; V2: Published in Physical Review D | Phys. Rev. D 102, 024025 (2020) | 10.1103/PhysRevD.102.024025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a regularization procedure for the novel Einstein-Gauss-Bonnet
theory of gravity, which produces a set of field equations that can be written
in closed form in four dimensions. Our method consists of introducing a counter
term into the action, and does not rely on the embedding or compactification of
any h... | [
{
"created": "Fri, 17 Apr 2020 17:36:55 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2020 15:39:03 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Carrilho",
"Pedro",
""
],
[
"Clifton",
"Timothy",
""
],
[
"Mulryne",
"David J.",
""
]
] | We propose a regularization procedure for the novel Einstein-Gauss-Bonnet theory of gravity, which produces a set of field equations that can be written in closed form in four dimensions. Our method consists of introducing a counter term into the action, and does not rely on the embedding or compactification of any hig... |
1908.03337 | Mohammad Mehrafarin | Mansoureh Hoseini and Mohammad Mehrafarin | Cosmological Birefringence and the Geometric Phase of Photons | To appear in Phys. Lett. B., 2019 | Phys. Lett. B 797 (2019) 134841 | 10.1016/j.physletb.2019.134841 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regarding axion electrodynamics in the background flat FRW universe, we show
that cosmological birefringence arises from an adiabatic noncyclic geometric
phase that appears in the quantum state of photons because of their interaction
with the axion field. We also show that the axion electrodynamics is equivalent
to s... | [
{
"created": "Fri, 9 Aug 2019 07:02:43 GMT",
"version": "v1"
}
] | 2019-08-19 | [
[
"Hoseini",
"Mansoureh",
""
],
[
"Mehrafarin",
"Mohammad",
""
]
] | Regarding axion electrodynamics in the background flat FRW universe, we show that cosmological birefringence arises from an adiabatic noncyclic geometric phase that appears in the quantum state of photons because of their interaction with the axion field. We also show that the axion electrodynamics is equivalent to sta... |
1710.05891 | Huan Yang | Huan Yang, William E. East, Luis Lehner | Can we distinguish low mass black holes in neutron star binaries? | 7 pages, 3 figures, fig 2 updated to fix an error in the previous
version | The Astrophysical Journal 856, 110, 2018 | 10.3847/1538-4357/aab2b0 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of gravitational waves from coalescing binary neutron stars
represents another milestone in gravitational-wave astronomy. However, since
LIGO is currently not as sensitive to the merger/ringdown part of the waveform,
the possibility that such signals are produced by a black hole-neutron star
binary can ... | [
{
"created": "Mon, 16 Oct 2017 17:44:34 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Aug 2018 14:48:30 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Nov 2018 19:57:57 GMT",
"version": "v3"
}
] | 2018-12-03 | [
[
"Yang",
"Huan",
""
],
[
"East",
"William E.",
""
],
[
"Lehner",
"Luis",
""
]
] | The detection of gravitational waves from coalescing binary neutron stars represents another milestone in gravitational-wave astronomy. However, since LIGO is currently not as sensitive to the merger/ringdown part of the waveform, the possibility that such signals are produced by a black hole-neutron star binary can no... |
2307.12102 | Tatyana P. Shestakova | R. I. Ayala O\~na, M. B. Kalmykov, D. P. Kislyakova and T. P.
Shestakova | The semiclassical limit of quantum gravity and the problem of time | 18 pages, no figure, to be published in Int. J. Mod. Phys. D | null | 10.1142/S0218271823400035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question about the appearance of time in the semiclassical limit of
quantum gravity continues to be discussed in the literature. It is believed
that a temporal Schrodinger equation for matter fields on the background of a
classical gravitational field must be true. To obtain this equation, the Born -
Oppenheimer ... | [
{
"created": "Sat, 22 Jul 2023 15:23:31 GMT",
"version": "v1"
}
] | 2023-07-25 | [
[
"Oña",
"R. I. Ayala",
""
],
[
"Kalmykov",
"M. B.",
""
],
[
"Kislyakova",
"D. P.",
""
],
[
"Shestakova",
"T. P.",
""
]
] | The question about the appearance of time in the semiclassical limit of quantum gravity continues to be discussed in the literature. It is believed that a temporal Schrodinger equation for matter fields on the background of a classical gravitational field must be true. To obtain this equation, the Born - Oppenheimer ap... |
2303.13840 | Rebecca Briffa Ms | Rebecca Briffa, Celia Escamilla-Rivera, Jackson Levi Said, Jurgen
Mifsud | Constraints on $f(T)$ Cosmology with Pantheon+ | null | Monthly Notices of the Royal Astronomical Society 552 (2023)
6024-6034 | 10.1093/mnras/stad1384 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | $f(T)$ cosmology has shown promise in explaining aspects of cosmic evolution.
In this work, we analyze constraints on leading models of $f(T)$ gravity in the
context of the recently released Pantheon+ data set, together with comparisons
with previous releases. We also consider other late-time data sets including
cosm... | [
{
"created": "Fri, 24 Mar 2023 07:25:31 GMT",
"version": "v1"
}
] | 2023-05-22 | [
[
"Briffa",
"Rebecca",
""
],
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Mifsud",
"Jurgen",
""
]
] | $f(T)$ cosmology has shown promise in explaining aspects of cosmic evolution. In this work, we analyze constraints on leading models of $f(T)$ gravity in the context of the recently released Pantheon+ data set, together with comparisons with previous releases. We also consider other late-time data sets including cosmic... |
gr-qc/9710010 | Matt Visser | Matt Visser (Washington University) | Energy conditions and galaxy formation | Three pages, uses mprocl.sty To appear in the proceedings of the
Eighth Marcel Grossmann Conference on General Relativity. (Jerusalem, Israel,
June 1997) [Minor typo fixed in references.] | null | 10.1126/science.276.5309.88 | null | gr-qc astro-ph | null | This note summarizes a model-independent analysis of the age of the universe
problem that trades off precision in favour of robustness: The energy
conditions of Einstein gravity are designed to extract as much information as
possible from classical general relativity without specifying a particular
equation of state.... | [
{
"created": "Thu, 2 Oct 1997 04:29:44 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Oct 1997 01:52:22 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Visser",
"Matt",
"",
"Washington University"
]
] | This note summarizes a model-independent analysis of the age of the universe problem that trades off precision in favour of robustness: The energy conditions of Einstein gravity are designed to extract as much information as possible from classical general relativity without specifying a particular equation of state. T... |
2102.02713 | Scott A. Hughes | Scott A. Hughes, Niels Warburton, Gaurav Khanna, Alvin J. K. Chua, and
Michael L. Katz | Adiabatic waveforms for extreme mass-ratio inspirals via multivoice
decomposition in time and frequency | 31 pages, 17 figures. Update: corrected a sign error in a term in Eq.
(B5). This factor was correct in the related code, it was purely a typo in
the manuscript. An erratum to PRD has been submitted. Many thanks to Angelica
Albertini for bringing this error to our attention. Update 2: corrected a
missing factor ... | Phys. Rev. D 103, 104014 (2021) | 10.1103/PhysRevD.103.104014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute adiabatic waveforms for extreme mass-ratio inspirals (EMRIs) by
"stitching" together a long inspiral waveform from a sequence of waveform
snapshots, each of which corresponds to a particular geodesic orbit. We show
that the complicated total waveform can be regarded as a sum of "voices." Each
voice evolves... | [
{
"created": "Thu, 4 Feb 2021 16:12:22 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Apr 2021 15:10:51 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Jun 2021 15:46:27 GMT",
"version": "v3"
},
{
"created": "Fri, 24 Mar 2023 12:25:39 GMT",
"version": "v4"
},
{
"cr... | 2024-04-01 | [
[
"Hughes",
"Scott A.",
""
],
[
"Warburton",
"Niels",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Chua",
"Alvin J. K.",
""
],
[
"Katz",
"Michael L.",
""
]
] | We compute adiabatic waveforms for extreme mass-ratio inspirals (EMRIs) by "stitching" together a long inspiral waveform from a sequence of waveform snapshots, each of which corresponds to a particular geodesic orbit. We show that the complicated total waveform can be regarded as a sum of "voices." Each voice evolves i... |
2109.12670 | Kirill Bronnikov | Kirill A. Bronnikov, Pavel E. Kashargin, Sergey V. Sushkov | Magnetized dusty black holes and wormholes | 17 pages, 5 figures. Some comments and references added, matching to
the published version, as well as other minor corrections | Universe 7, 419 (2021) | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the generalized Tolman solution of general relativity, describing
the evolution of a spherical dust cloud in the presence of an external electric
or magnetic field. The solution contains three arbitrary functions $f(R)$,
$F(R)$ and $\tau_0(R)$, where $R$ is a radial coordinate in the comoving
reference fr... | [
{
"created": "Sun, 26 Sep 2021 18:28:25 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Nov 2021 15:58:08 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Nov 2021 15:12:05 GMT",
"version": "v3"
}
] | 2021-11-18 | [
[
"Bronnikov",
"Kirill A.",
""
],
[
"Kashargin",
"Pavel E.",
""
],
[
"Sushkov",
"Sergey V.",
""
]
] | We consider the generalized Tolman solution of general relativity, describing the evolution of a spherical dust cloud in the presence of an external electric or magnetic field. The solution contains three arbitrary functions $f(R)$, $F(R)$ and $\tau_0(R)$, where $R$ is a radial coordinate in the comoving reference fram... |
0804.1174 | Mu-Tao Wang | Mu-Tao Wang and Shing-Tung Yau | Quasilocal mass in general relativity | 10 pages, editorial changes made to comply with journal's page limit,
to appear in Physical Review Letters | Phys.Rev.Lett.102:021101,2009 | 10.1103/PhysRevLett.102.021101 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There have been many attempts to define the notion of quasilocal mass for a
spacelike 2-surface in spacetime by the Hamilton-Jacobi analysis. The essential
difficulty in this approach is to identify the right choice of the background
configuration to be subtracted from the physical Hamiltonian. Quasilocal mass
should... | [
{
"created": "Tue, 8 Apr 2008 02:35:12 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jul 2008 10:49:49 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Dec 2008 16:32:44 GMT",
"version": "v3"
}
] | 2009-02-23 | [
[
"Wang",
"Mu-Tao",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | There have been many attempts to define the notion of quasilocal mass for a spacelike 2-surface in spacetime by the Hamilton-Jacobi analysis. The essential difficulty in this approach is to identify the right choice of the background configuration to be subtracted from the physical Hamiltonian. Quasilocal mass should b... |
gr-qc/9801064 | Toporenskij A. V. | A.Yu.Kamenshchik, I.M.Khalatnikov, A.V.Toporensky | Simplest cosmological model with the scalar field | 24 pages with 2 gif figures and 4 eps figures, mprocl.sty, To appear
in International Journal of Modern Physics D | Int.J.Mod.Phys. D6 (1997) 673-692 | 10.1142/S0218271897000418 | null | gr-qc | null | We investigate the simplest cosmological model with the massive real scalar
non-interacting inflaton field minimally coupled to gravity. The classification
of trajectories in closed minisuperspace Friedmann-Robertson-Walker model is
presented.The fractal nature of a set of infinitely bounced trajectories is
discussed... | [
{
"created": "Tue, 20 Jan 1998 15:13:47 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Khalatnikov",
"I. M.",
""
],
[
"Toporensky",
"A. V.",
""
]
] | We investigate the simplest cosmological model with the massive real scalar non-interacting inflaton field minimally coupled to gravity. The classification of trajectories in closed minisuperspace Friedmann-Robertson-Walker model is presented.The fractal nature of a set of infinitely bounced trajectories is discussed. ... |
1512.08166 | Argha Banerjee | Argha Banerjee | Inflation in Brane World Gravity | 53 pages (in English), 13 figures. M.Sc. thesis submitted to
Presidency University on May, 2015 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the inflationary dynamics in Brane World gravity and look for
observational signatures of any deviation from the standard General Relativity
based results of Cosmological Perturbation Theory. We first review the standard
paradigm of General Relativity based inflationary dynamics and cosmological
perturbation... | [
{
"created": "Sun, 27 Dec 2015 03:04:35 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2015 02:48:08 GMT",
"version": "v2"
}
] | 2015-12-31 | [
[
"Banerjee",
"Argha",
""
]
] | We study the inflationary dynamics in Brane World gravity and look for observational signatures of any deviation from the standard General Relativity based results of Cosmological Perturbation Theory. We first review the standard paradigm of General Relativity based inflationary dynamics and cosmological perturbation t... |
1504.02423 | Andrea Pelissetto | A. Pelissetto and M. Testa | Getting the Lorentz transformations without requiring an invariant speed | 4 pages, 1 figure | American Journal of Physics 83 (2015) 338-340 | 10.1119/1.4901453 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The structure of the Lorentz transformations follows purely from the absence
of privileged inertial reference frames and the group structure (closure under
composition) of the transformations---two assumptions that are simple and
physically necessary. The existence of an invariant speed is \textit{not} a
necessary as... | [
{
"created": "Wed, 8 Apr 2015 11:13:44 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Pelissetto",
"A.",
""
],
[
"Testa",
"M.",
""
]
] | The structure of the Lorentz transformations follows purely from the absence of privileged inertial reference frames and the group structure (closure under composition) of the transformations---two assumptions that are simple and physically necessary. The existence of an invariant speed is \textit{not} a necessary assu... |
1304.1878 | Lorenzo Sebastiani | Guido Cognola, Ratbay Myrzakulov, Lorenzo Sebastiani and Sergio
Zerbini | Einstein gravity with Gauss-Bonnet entropic corrections | 11 pages, published version | Phys. Rev. D, v. 88, N2, 024006 (2013) | 10.1103/PhysRevD.88.024006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A toy model of Einstein gravity with a Gauss-Bonnet classically "entropic"
term mimicking a quantum correction is considered. The static black hole
solution due to Tomozawa is found and generalized with the inclusion of non
trivial horizon topology, and its entropy evaluated deriving the first law by
equations of mot... | [
{
"created": "Sat, 6 Apr 2013 11:36:59 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jun 2013 04:07:04 GMT",
"version": "v2"
}
] | 2013-10-15 | [
[
"Cognola",
"Guido",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
],
[
"Zerbini",
"Sergio",
""
]
] | A toy model of Einstein gravity with a Gauss-Bonnet classically "entropic" term mimicking a quantum correction is considered. The static black hole solution due to Tomozawa is found and generalized with the inclusion of non trivial horizon topology, and its entropy evaluated deriving the first law by equations of motio... |
gr-qc/0102098 | Laurent Freidel | Laurent Freidel | A Ponzano-Regge model of Lorentzian 3-Dimensional gravity | 7 pages, Talk presented at Villasimius 1999, constraint dynamics and
quantum gravity conference | Nucl.Phys.Proc.Suppl. 88 (2000) 237-240 | 10.1016/S0920-5632(00)00775-1 | null | gr-qc | null | We present the construction of the partition function of 3-dimensional
gravity in the Lorentzian regime as a state sum model over a triangulation.
This generalize the work of Ponzano and Regge to the case of Lorentzian
signature.
| [
{
"created": "Thu, 22 Feb 2001 15:54:46 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Freidel",
"Laurent",
""
]
] | We present the construction of the partition function of 3-dimensional gravity in the Lorentzian regime as a state sum model over a triangulation. This generalize the work of Ponzano and Regge to the case of Lorentzian signature. |
1807.06268 | Dao-Jun Liu | Yang Huang, Yi-Ping Dong and Dao-Jun Liu | Revisiting the shadow of a black hole in the presence of a plasma | 16 pages, 8 figures, published in Int. J. Mod. Phys. D | null | 10.1142/S0218271818501146 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the photon's motion around a black hole in the presence of a plasma
whose density is a function of the radius coordinate by a renewed ray-tracing
algorithm and investigate the influence of the plasma on the shadow of the
black hole. The presence of plasma affects not only the size but also the shape
of black... | [
{
"created": "Tue, 17 Jul 2018 08:06:30 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Huang",
"Yang",
""
],
[
"Dong",
"Yi-Ping",
""
],
[
"Liu",
"Dao-Jun",
""
]
] | We study the photon's motion around a black hole in the presence of a plasma whose density is a function of the radius coordinate by a renewed ray-tracing algorithm and investigate the influence of the plasma on the shadow of the black hole. The presence of plasma affects not only the size but also the shape of black h... |
1007.2768 | Jonathan Engle | Christopher Beetle, Jonathan Engle | Generic isolated horizons in loop quantum gravity | 13 pages | Class.Quant.Grav.27:235024,2010 | 10.1088/0264-9381/27/23/235024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Isolated horizons model equilibrium states of classical black holes. A
detailed quantization, starting from a classical phase space restricted to
spherically symmetric horizons, exists in the literature and has since been
extended to axisymmetry. This paper extends the quantum theory to horizons of
arbitrary shape. S... | [
{
"created": "Fri, 16 Jul 2010 13:15:03 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Beetle",
"Christopher",
""
],
[
"Engle",
"Jonathan",
""
]
] | Isolated horizons model equilibrium states of classical black holes. A detailed quantization, starting from a classical phase space restricted to spherically symmetric horizons, exists in the literature and has since been extended to axisymmetry. This paper extends the quantum theory to horizons of arbitrary shape. Sur... |
1005.5296 | Edward Porter | Edward K. Porter and Alberto Sesana | Eccentric Massive Black Hole Binaries in LISA I : The Detection
Capabilities of Circular Templates | Revtex, 21 pages, 12 figures. Submitted to PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the major assumptions in the search for gravitational wave signatures
from massive and supermassive black hole binaries with LISA, is that these
systems will have circularized before entering the LISA bandwidth. Current
astrophysical simulations now suggest that systems could have a non-negligible
eccentricity... | [
{
"created": "Fri, 28 May 2010 14:14:48 GMT",
"version": "v1"
}
] | 2010-05-31 | [
[
"Porter",
"Edward K.",
""
],
[
"Sesana",
"Alberto",
""
]
] | One of the major assumptions in the search for gravitational wave signatures from massive and supermassive black hole binaries with LISA, is that these systems will have circularized before entering the LISA bandwidth. Current astrophysical simulations now suggest that systems could have a non-negligible eccentricity i... |
0903.5225 | Maurice Dupre | Maurice J. Dupr\'e | The Fully Covariant Energy Momentum Stress Tensor For Gravity and the
Einstein Equation in General Relativity | preprint | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a fully covariant energy momentum stress tensor for the gravitational
field which is easily physically motivated, and which leads to a very general
derivation of the Einstein equation for gravity. We do not need to assume any
property of the surce matter fields' energy momentum stress tensor other than
symmet... | [
{
"created": "Mon, 30 Mar 2009 13:53:46 GMT",
"version": "v1"
}
] | 2009-03-31 | [
[
"Dupré",
"Maurice J.",
""
]
] | We give a fully covariant energy momentum stress tensor for the gravitational field which is easily physically motivated, and which leads to a very general derivation of the Einstein equation for gravity. We do not need to assume any property of the surce matter fields' energy momentum stress tensor other than symmetry... |
2010.02753 | Prabir Rudra | Chayan Ranjit (Egra S.S.B. College), Prabir Rudra (Asutosh College),
Sujata Kundu (Narula Instt. of Tech.) | Constraints on Energy Momentum Squared Gravity from cosmic chronometers
and Supernovae Type Ia data | 22 pages, 18 figures | Annals of Physics, Volume 428 (2021) 168432 | 10.1016/j.aop.2021.168432 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we perform an observational data analysis on the energy momentum
squared gravity model. Possible solutions for matter density are obtained from
the model and their cosmological implications are studied. Some recent
observational data is used to constrain model parameters using statistical
techniques. We ... | [
{
"created": "Sun, 4 Oct 2020 14:21:34 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Mar 2021 17:14:35 GMT",
"version": "v2"
}
] | 2021-03-25 | [
[
"Ranjit",
"Chayan",
"",
"Egra S.S.B. College"
],
[
"Rudra",
"Prabir",
"",
"Asutosh College"
],
[
"Kundu",
"Sujata",
"",
"Narula Instt. of Tech."
]
] | In this work we perform an observational data analysis on the energy momentum squared gravity model. Possible solutions for matter density are obtained from the model and their cosmological implications are studied. Some recent observational data is used to constrain model parameters using statistical techniques. We ha... |
2407.08241 | Zhen-Ming Xu | Zhen-Ming Xu, Pan-Pan Zhang, Bin Wu, Xing Zhang | Thermodynamic bounce effect in quantum BTZ black hole | 8 pages, 3 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel thermodynamic phenomenon has been observed in the quantum
Ba\~{n}ados-Teitelboim-Zanelli (qBTZ) black hole, utilizing generalized free
energy and Kramer escape rate. This phenomenon also reveals the unique property
of the quantum black hole. The stochastic thermal motion of various
thermodynamic states within... | [
{
"created": "Thu, 11 Jul 2024 07:38:09 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Xu",
"Zhen-Ming",
""
],
[
"Zhang",
"Pan-Pan",
""
],
[
"Wu",
"Bin",
""
],
[
"Zhang",
"Xing",
""
]
] | A novel thermodynamic phenomenon has been observed in the quantum Ba\~{n}ados-Teitelboim-Zanelli (qBTZ) black hole, utilizing generalized free energy and Kramer escape rate. This phenomenon also reveals the unique property of the quantum black hole. The stochastic thermal motion of various thermodynamic states within t... |
2210.01852 | Abhishek Joshi | Abhishek V. Joshi, Shawn G. Rosofsky, Roland Haas and E. A. Huerta | Numerical relativity higher order gravitational waveforms of eccentric,
spinning, non-precessing binary black hole mergers | 13 pages, 5 figures, updated manuscript with added waveform
comparisons to TEOBResumS. accepted in Phys. Rev. D | Phys. Rev. D 107, 064038 (2023) | 10.1103/PhysRevD.107.064038 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We use the open source, community-driven, numerical relativity software, the
Einstein Toolkit to study the physics of eccentric, spinning, nonprecessing
binary black hole mergers with mass-ratios $q=\{2, 4, 6\}$, individual
dimensionless spin parameters $\chi_{1z}=\pm0.6$, $\chi_{2z}=\pm0.3$, that
include higher orde... | [
{
"created": "Tue, 4 Oct 2022 18:43:09 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Mar 2023 08:20:54 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Joshi",
"Abhishek V.",
""
],
[
"Rosofsky",
"Shawn G.",
""
],
[
"Haas",
"Roland",
""
],
[
"Huerta",
"E. A.",
""
]
] | We use the open source, community-driven, numerical relativity software, the Einstein Toolkit to study the physics of eccentric, spinning, nonprecessing binary black hole mergers with mass-ratios $q=\{2, 4, 6\}$, individual dimensionless spin parameters $\chi_{1z}=\pm0.6$, $\chi_{2z}=\pm0.3$, that include higher order ... |
2206.14006 | Teagan Clarke | Teagan A. Clarke, Isobel M. Romero-Shaw, Paul D. Lasky, Eric Thrane | Gravitational-wave inference for eccentric binaries: the argument of
periapsis | 7 pages, 4 figures. Accepted in MNRAS | null | 10.1093/mnras/stac2965 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from binary black hole mergers have allowed us to
directly observe stellar-mass black hole binaries for the first time, and
therefore explore their formation channels. One of the ways to infer how a
binary system is assembled is by measuring the system's orbital eccentricity.
Current methods of pa... | [
{
"created": "Tue, 28 Jun 2022 13:47:40 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2022 03:21:15 GMT",
"version": "v2"
}
] | 2022-10-26 | [
[
"Clarke",
"Teagan A.",
""
],
[
"Romero-Shaw",
"Isobel M.",
""
],
[
"Lasky",
"Paul D.",
""
],
[
"Thrane",
"Eric",
""
]
] | Gravitational waves from binary black hole mergers have allowed us to directly observe stellar-mass black hole binaries for the first time, and therefore explore their formation channels. One of the ways to infer how a binary system is assembled is by measuring the system's orbital eccentricity. Current methods of para... |
1502.01622 | Alberto Enciso | Alberto Enciso and Niky Kamran | Determining an asymptotically AdS spacetime from data on its conformal
boundary | 6 pages | null | 10.1007/s10714-015-1974-5 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An outstanding question lying at the core of the AdS/CFT correspondence in
string theory is the holographic prescription problem for Einstein metrics,
which asserts that one can slightly perturb the conformal geometry at infinity
of the anti-de Sitter space and still obtain an asymptotically anti-de Sitter
spacetime ... | [
{
"created": "Thu, 5 Feb 2015 16:17:29 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 08:03:49 GMT",
"version": "v2"
}
] | 2015-12-09 | [
[
"Enciso",
"Alberto",
""
],
[
"Kamran",
"Niky",
""
]
] | An outstanding question lying at the core of the AdS/CFT correspondence in string theory is the holographic prescription problem for Einstein metrics, which asserts that one can slightly perturb the conformal geometry at infinity of the anti-de Sitter space and still obtain an asymptotically anti-de Sitter spacetime th... |
0809.2422 | Vladimir S. Manko | V.S. Manko, E.D. Rodchenko, E. Ruiz and B.I. Sadovnikov | Exact solution for the simplest binary system of Kerr black holes | 9 pages, 1 figure, typos corrected, a footnote on p.6 extended | Phys.Rev.D78:124014,2008 | 10.1103/PhysRevD.78.124014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The full metric describing two counter-rotating identical Kerr black holes
separated by a massless strut is derived in the explicit analytical form. It
contains three arbitrary parameters which are the Komar mass M, Komar angular
momentum per unit mass a of one of the black holes (the other has the same mass
and equa... | [
{
"created": "Sun, 14 Sep 2008 22:00:22 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Oct 2008 12:59:39 GMT",
"version": "v2"
}
] | 2008-12-30 | [
[
"Manko",
"V. S.",
""
],
[
"Rodchenko",
"E. D.",
""
],
[
"Ruiz",
"E.",
""
],
[
"Sadovnikov",
"B. I.",
""
]
] | The full metric describing two counter-rotating identical Kerr black holes separated by a massless strut is derived in the explicit analytical form. It contains three arbitrary parameters which are the Komar mass M, Komar angular momentum per unit mass a of one of the black holes (the other has the same mass and equal ... |
1902.08200 | Kartik Prabhu | Kartik Prabhu | Conservation of asymptotic charges from past to future null infinity:
Supermomentum in general relativity | v2: corrected formula for epsilon in Eqs. A.4E and A.9 v1: (published
version in JHEP) 49 pages, 2 figures. arXiv admin note: substantial text
overlap with arXiv:1808.07863 | JHEP 03 (2019) 148 | 10.1007/JHEP03(2019)148 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the BMS-supertranslations and their associated supermomenta on
past null infinity can be related to those on future null infinity, proving the
conjecture of Strominger for a class of spacetimes which are
asymptotically-flat in the sense of Ashtekar and Hansen. Using a cylindrical
3-manifold of both null ... | [
{
"created": "Thu, 21 Feb 2019 17:55:53 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Mar 2019 19:38:30 GMT",
"version": "v2"
}
] | 2019-04-02 | [
[
"Prabhu",
"Kartik",
""
]
] | We show that the BMS-supertranslations and their associated supermomenta on past null infinity can be related to those on future null infinity, proving the conjecture of Strominger for a class of spacetimes which are asymptotically-flat in the sense of Ashtekar and Hansen. Using a cylindrical 3-manifold of both null an... |
gr-qc/0411070 | John Barrow | John D. Barrow and Christos G. Tsagas (DAMTP) | Structure and stability of the Lukash plane-wave spacetime | Revised version, references added. To appear in Class. Quantum Grav | Class.Quant.Grav. 22 (2005) 825-840 | 10.1088/0264-9381/22/5/005 | null | gr-qc astro-ph hep-th | null | We study the vacuum, plane-wave Bianchi $VII{}_{h}$ spacetimes described by
the Lukash metric. Combining covariant with orthonormal frame techniques, we
describe these models in terms of their irreducible kinematical and geometrical
quantities. This covariant description is used to study analytically the
response of ... | [
{
"created": "Mon, 15 Nov 2004 17:52:34 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Feb 2005 17:03:58 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Barrow",
"John D.",
"",
"DAMTP"
],
[
"Tsagas",
"Christos G.",
"",
"DAMTP"
]
] | We study the vacuum, plane-wave Bianchi $VII{}_{h}$ spacetimes described by the Lukash metric. Combining covariant with orthonormal frame techniques, we describe these models in terms of their irreducible kinematical and geometrical quantities. This covariant description is used to study analytically the response of th... |
1601.01460 | Grant J. Mathews | InSaeng Suh, Grant J. Mathews, J. Reese Haywood, N. Q. Lan | Review of Conformally Flat Approximation for Binary Neutron Star Initial
Conditions | 22 pages, 12 figures, revised as per referee recommendations | null | 10.1155/2017/6127031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spatially conformally flat approximation (CFA) is a viable method to
deduce initial conditions for the subsequent evolution of binary neutron stars
employing the full Einstein equations. Here we review the status of the
original formulation of the CFA for the general relativistic hydrodynamic
initial conditions o... | [
{
"created": "Thu, 7 Jan 2016 09:46:30 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2016 17:37:12 GMT",
"version": "v2"
}
] | 2017-01-18 | [
[
"Suh",
"InSaeng",
""
],
[
"Mathews",
"Grant J.",
""
],
[
"Haywood",
"J. Reese",
""
],
[
"Lan",
"N. Q.",
""
]
] | The spatially conformally flat approximation (CFA) is a viable method to deduce initial conditions for the subsequent evolution of binary neutron stars employing the full Einstein equations. Here we review the status of the original formulation of the CFA for the general relativistic hydrodynamic initial conditions of ... |
2310.13946 | Daniel Jampolski | Daniel Jampolski, Luciano Rezzolla | Nested solutions of gravitational condensate stars | 26 pages, 12 figures; matches published version in Class.Quant.Grav | Classical and Quantum Gravity, Volume 41, Number 6, 2024 | 10.1088/1361-6382/ad2317 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes are normally and naturally associated to the end-point of
gravitational collapse. Yet, alternatives have been proposed and a particularly
interesting one is that of gravitational condensate stars, or gravastars. We
here revisit the gravastar model and increase the degree of speculation by
considering new ... | [
{
"created": "Sat, 21 Oct 2023 09:00:00 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Feb 2024 01:00:00 GMT",
"version": "v2"
}
] | 2024-02-20 | [
[
"Jampolski",
"Daniel",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | Black holes are normally and naturally associated to the end-point of gravitational collapse. Yet, alternatives have been proposed and a particularly interesting one is that of gravitational condensate stars, or gravastars. We here revisit the gravastar model and increase the degree of speculation by considering new so... |
1602.04766 | Stoytcho Yazadjiev | Stoytcho S. Yazadjiev, Daniela D. Doneva and Dimitar Popchev | Slowly rotating neutron stars in scalar-tensor theories with a massive
scalar field | 12 pages, 4 figures | Phys. Rev. D 93, 084038 (2016) | 10.1103/PhysRevD.93.084038 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the scalar-tensor theories with a massive scalar field the coupling
constants, and the coupling functions in general, which are observationally
allowed, can differ significantly from those in the massless case. This fact
naturally implies that the scalar-tensor neutron stars with a massive scalar
field can have ra... | [
{
"created": "Mon, 15 Feb 2016 18:54:07 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"Yazadjiev",
"Stoytcho S.",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Popchev",
"Dimitar",
""
]
] | In the scalar-tensor theories with a massive scalar field the coupling constants, and the coupling functions in general, which are observationally allowed, can differ significantly from those in the massless case. This fact naturally implies that the scalar-tensor neutron stars with a massive scalar field can have rath... |
gr-qc/9805058 | Devis Iellici | Devis Iellici (Univ. of Trento and INFN) | Aspects and applications of quantum field theory on spaces with conical
singularities | LaTeX, 146 pages, 2 eps figures included. Ph.D. dissertation | null | null | null | gr-qc hep-th | null | One-loop effects for quantum fields living on manifolds containing conical
singularities are investigated in the context of cosmic string background and
of finite-temperature theory in the Rindler wedge or outside the horizon of a
Schwarzschild black-hole.
| [
{
"created": "Thu, 14 May 1998 15:15:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Iellici",
"Devis",
"",
"Univ. of Trento and INFN"
]
] | One-loop effects for quantum fields living on manifolds containing conical singularities are investigated in the context of cosmic string background and of finite-temperature theory in the Rindler wedge or outside the horizon of a Schwarzschild black-hole. |
1811.09232 | Soumi De | Soumi De, Christopher M. Biwer, Collin D. Capano, Alexander H. Nitz,
Duncan A. Brown | Posterior samples of the parameters of binary black holes from Advanced
LIGO, Virgo's second observing run | 15 pages, 4 figures | Scientific Data 6, 81 (2019) | 10.1038/s41597-019-0086-6 | null | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | This paper presents a parameter estimation analysis of the seven binary black
hole mergers---GW170104, GW170608, GW170729, GW170809, GW170814, GW170818, and
GW170823---detected during the second observing run of the Advanced LIGO and
Virgo observatories using the gravitational-wave open data. We describe the
methodol... | [
{
"created": "Thu, 22 Nov 2018 16:44:53 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Mar 2019 00:40:52 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Jun 2019 23:46:38 GMT",
"version": "v3"
}
] | 2019-06-05 | [
[
"De",
"Soumi",
""
],
[
"Biwer",
"Christopher M.",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Nitz",
"Alexander H.",
""
],
[
"Brown",
"Duncan A.",
""
]
] | This paper presents a parameter estimation analysis of the seven binary black hole mergers---GW170104, GW170608, GW170729, GW170809, GW170814, GW170818, and GW170823---detected during the second observing run of the Advanced LIGO and Virgo observatories using the gravitational-wave open data. We describe the methodolog... |
2310.01005 | David Izabel | David Izabel | Analogy of space time as un elastic medium -- Can we establish a thermal
expansion coefficient of space from the cosmological constant Lambda? | 33 pages, 3 figures | International Journal of modern Physic D 24 september 2023 | 10.1142/S0218271823500918 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper advances the state of the art by extending the study of the
analogy between the spacetime fabric and elasticity.As no prior work exists
about a potential spacetime thermal expansion coeff Lambda, we explore the
analogy of GR with the elasticity theory by considering the cosmological
constant Lambda as an a... | [
{
"created": "Mon, 2 Oct 2023 09:01:18 GMT",
"version": "v1"
}
] | 2023-10-03 | [
[
"Izabel",
"David",
""
]
] | This paper advances the state of the art by extending the study of the analogy between the spacetime fabric and elasticity.As no prior work exists about a potential spacetime thermal expansion coeff Lambda, we explore the analogy of GR with the elasticity theory by considering the cosmological constant Lambda as an add... |
2304.01265 | Paolo Pani | Oscar J. C. Dias and Giuseppe Lingetti and Paolo Pani and Jorge E.
Santos | Black hole superradiant instability for massive spin-2 fields | 5+3 pages, 2+1 figures v2: extended appendix with numerical details.
Matches PRD version | Phys. Rev. D 108, L041502 (2023) | 10.1103/PhysRevD.108.L041502 | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Due to coherent superradiant amplification, massive bosonic fields can
trigger an instability in spinning black holes, tapping their energy and
angular momentum and forming macroscopic Bose-Einstein condensates around them.
This phenomenon produces gaps in the mass-spin distribution of astrophysical
black holes, a co... | [
{
"created": "Mon, 3 Apr 2023 18:00:56 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Sep 2023 08:51:50 GMT",
"version": "v2"
}
] | 2023-09-22 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Lingetti",
"Giuseppe",
""
],
[
"Pani",
"Paolo",
""
],
[
"Santos",
"Jorge E.",
""
]
] | Due to coherent superradiant amplification, massive bosonic fields can trigger an instability in spinning black holes, tapping their energy and angular momentum and forming macroscopic Bose-Einstein condensates around them. This phenomenon produces gaps in the mass-spin distribution of astrophysical black holes, a cont... |
0812.2428 | Valeria Kagramanova | Eva Hackmann, Valeria Kagramanova, Jutta Kunz and Claus Laemmerzahl | Analytic solutions of the geodesic equation in higher dimensional static
spherically symmetric space-times | accepted for publication in PRD | Phys.Rev.D78:124018,2008; Erratum-ibid.79:029901,2009 | 10.1103/PhysRevD.78.124018 10.1103/PhysRevD.79.029901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complete analytical solutions of the geodesic equation of massive test
particles in higher dimensional Schwarzschild, Schwarzschild-(anti)de Sitter,
Reissner-Nordstroem and Reissner-Nordstroem-(anti)de Sitter space--times are
presented. Using the Jacobi inversion problem restricted to the theta divisor
the explic... | [
{
"created": "Fri, 12 Dec 2008 16:59:07 GMT",
"version": "v1"
}
] | 2009-04-23 | [
[
"Hackmann",
"Eva",
""
],
[
"Kagramanova",
"Valeria",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Laemmerzahl",
"Claus",
""
]
] | The complete analytical solutions of the geodesic equation of massive test particles in higher dimensional Schwarzschild, Schwarzschild-(anti)de Sitter, Reissner-Nordstroem and Reissner-Nordstroem-(anti)de Sitter space--times are presented. Using the Jacobi inversion problem restricted to the theta divisor the explicit... |
2408.02762 | Tousif Islam | Tousif Islam, Gaurav Khanna and Scott E. Field | Adding higher-order spherical harmonics in non-spinning eccentric binary
black hole merger waveform models | 14 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | gwNRHME is a recently developed framework that seamlessly converts a
multi-modal (i.e with several spherical harmonic modes) quasi-circular waveform
into multi-modal eccentric waveform if the quadrupolar eccentric waveform is
known. Here, we employ the gwNRHME framework to combine a multi-modal
quasi-circular wavefor... | [
{
"created": "Mon, 5 Aug 2024 18:26:04 GMT",
"version": "v1"
}
] | 2024-08-07 | [
[
"Islam",
"Tousif",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Field",
"Scott E.",
""
]
] | gwNRHME is a recently developed framework that seamlessly converts a multi-modal (i.e with several spherical harmonic modes) quasi-circular waveform into multi-modal eccentric waveform if the quadrupolar eccentric waveform is known. Here, we employ the gwNRHME framework to combine a multi-modal quasi-circular waveform ... |
2408.07166 | Pedro A S\'anchez | Pedro A. S\'anchez | Kundt Gravitational Waves Coupled with a Non-Noetherian Conformal Scalar
Field | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Type N spacetimes of the Kundt class are presented as solutions to the
Einstein's equations sourced by a real scalar field whose equation of motion is
conformally invariant and that generalizes the standard conformal scalar field.
The specific spacetimes considered model gravitational waves with uniform and
totally g... | [
{
"created": "Tue, 13 Aug 2024 19:11:54 GMT",
"version": "v1"
}
] | 2024-08-15 | [
[
"Sánchez",
"Pedro A.",
""
]
] | Type N spacetimes of the Kundt class are presented as solutions to the Einstein's equations sourced by a real scalar field whose equation of motion is conformally invariant and that generalizes the standard conformal scalar field. The specific spacetimes considered model gravitational waves with uniform and totally geo... |
2202.02221 | Oleksii Sokoliuk | Oleksii Sokoliuk, Alexander Baransky and Praduymn Kumar Sahoo | Non-singular T-K axion stars with/without the dynamical bosonic field in
the presence of negative $\Lambda$ term | 19 pages, 10 figures | Physics of the Dark Universe, 35 (2022) 100972 | 10.1016/j.dark.2022.100972 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present work authors derive exact solutions for the relativistic
compact stars in the presence of two fields axion (Dante's Inferno model) and
with/without the complex scalar field (with the quartic self-interaction)
coupled to gravity. The matter source is assumed as the perfect fluid one, and
we also use bar... | [
{
"created": "Thu, 3 Feb 2022 08:27:16 GMT",
"version": "v1"
}
] | 2022-02-07 | [
[
"Sokoliuk",
"Oleksii",
""
],
[
"Baransky",
"Alexander",
""
],
[
"Sahoo",
"Praduymn Kumar",
""
]
] | In the present work authors derive exact solutions for the relativistic compact stars in the presence of two fields axion (Dante's Inferno model) and with/without the complex scalar field (with the quartic self-interaction) coupled to gravity. The matter source is assumed as the perfect fluid one, and we also use barot... |
2102.06399 | Shuxun Tian | S. X. Tian and Zong-Hong Zhu | Early dark energy in $k$-essence | 5 pages, 2 figures, published in Phys. Rev. D | Phys. Rev. D 103, 043518 (2021) | 10.1103/PhysRevD.103.043518 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Early dark energy (EDE) that becomes subdominant around the epoch of
matter-radiation equality can be used to ease the Hubble tension. However,
there is a theoretical problem that why the energy scale of EDE is in
coincidence with that of matter-radiation equality when their physics are
completely unrelated. Sakstein... | [
{
"created": "Fri, 12 Feb 2021 08:57:19 GMT",
"version": "v1"
}
] | 2021-02-15 | [
[
"Tian",
"S. X.",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | Early dark energy (EDE) that becomes subdominant around the epoch of matter-radiation equality can be used to ease the Hubble tension. However, there is a theoretical problem that why the energy scale of EDE is in coincidence with that of matter-radiation equality when their physics are completely unrelated. Sakstein a... |
0710.3150 | Tao Luo | Tao Luo, Joel Smoller | Nonlinear Dynamical Stability of Newtonian Rotating White Dwarfs and
Supermassive Stars | null | Comm. Math. Physics, 284(2008) no.2, 425-457 | 10.1007/s00220-008-0569-3 | null | gr-qc math-ph math.MP | null | We prove general nonlinear stability and existence theorems for rotating star
solutions which are axi-symmetric steady-state solutions of the compressible
isentropic Euler-Poisson equations in 3 spatial dimensions. We apply our
results to rotating and non-rotating white dwarf, and rotating high density
supermassive (... | [
{
"created": "Tue, 16 Oct 2007 18:39:48 GMT",
"version": "v1"
}
] | 2014-08-04 | [
[
"Luo",
"Tao",
""
],
[
"Smoller",
"Joel",
""
]
] | We prove general nonlinear stability and existence theorems for rotating star solutions which are axi-symmetric steady-state solutions of the compressible isentropic Euler-Poisson equations in 3 spatial dimensions. We apply our results to rotating and non-rotating white dwarf, and rotating high density supermassive (ex... |
2210.06166 | Siddheshwar Kadam | S.A. Kadam, B.Mishra, Jackson Levi Said | Noether Symmetries in $f(T,T_G)$ Cosmology | 12 pages | Physica Scripta, 98, 4, 2023 | 10.1088/1402-4896/acc0ac | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All degrees of freedom related to the torsion scalar can be explored by
analysing, the $f(T,T_G)$ gravity formalism where, $T$ is a torsion scalar and
$T_G$ is the teleparallel counterpart of the Gauss-Bonnet topological invariant
term. The well-known Noether symmetry approach is a useful tool for selecting
models th... | [
{
"created": "Tue, 11 Oct 2022 11:37:54 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Mar 2023 10:47:33 GMT",
"version": "v2"
}
] | 2023-03-27 | [
[
"Kadam",
"S. A.",
""
],
[
"Mishra",
"B.",
""
],
[
"Said",
"Jackson Levi",
""
]
] | All degrees of freedom related to the torsion scalar can be explored by analysing, the $f(T,T_G)$ gravity formalism where, $T$ is a torsion scalar and $T_G$ is the teleparallel counterpart of the Gauss-Bonnet topological invariant term. The well-known Noether symmetry approach is a useful tool for selecting models that... |
1106.1632 | Stephen R. Lau | Stephen R. Lau and Richard H. Price | Sparse spectral-tau method for the three-dimensional helically reduced
wave equation on two-center domains | 37 pages, 3 figures, 12 tables | null | 10.1016/j.jcp.2012.07.006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a multidomain spectral-tau method for solving the
three-dimensional helically reduced wave equation on the type of two-center
domain that arises when modeling compact binary objects in astrophysical
applications. A global two-center domain may arise as the union of Cartesian
blocks, cylindrical shells, an... | [
{
"created": "Wed, 8 Jun 2011 19:40:13 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Lau",
"Stephen R.",
""
],
[
"Price",
"Richard H.",
""
]
] | We describe a multidomain spectral-tau method for solving the three-dimensional helically reduced wave equation on the type of two-center domain that arises when modeling compact binary objects in astrophysical applications. A global two-center domain may arise as the union of Cartesian blocks, cylindrical shells, and ... |
gr-qc/0209004 | Abel Camacho Quintana | Abel Camacho (Instituto Nacional de Investigaciones Nucleares) | Decoherence and bare mass induced by nonconformal metric fluctuations | 10 pages, accepted in General Relativity and Gravitation | Gen.Rel.Grav. 35 (2003) 319-325 | 10.1023/A:1022349328278 | null | gr-qc | null | The effects, upon the Klein--Gordon field, of nonconformal stochastic metric
fluctuations, are analyzed. It will be shown that these fluctuations allow us
to consider an effective mass, i.e., the mass detected in a laboratory is not
the parameter appearing in the Klein--Gordon equation, but a function of this
paramet... | [
{
"created": "Mon, 2 Sep 2002 13:56:13 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Camacho",
"Abel",
"",
"Instituto Nacional de Investigaciones Nucleares"
]
] | The effects, upon the Klein--Gordon field, of nonconformal stochastic metric fluctuations, are analyzed. It will be shown that these fluctuations allow us to consider an effective mass, i.e., the mass detected in a laboratory is not the parameter appearing in the Klein--Gordon equation, but a function of this parameter... |
1206.3772 | Eric Poisson | Marc Casals, Eric Poisson, and Ian Vega | Regularization of static self-forces | 23 pages, no figures | null | 10.1103/PhysRevD.86.064033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various regularization methods have been used to compute the self-force
acting on a static particle in a static, curved spacetime. Many of these are
based on Hadamard's two-point function in three dimensions. On the other hand,
the regularization method that enjoys the best justification is that of
Detweiler and Whit... | [
{
"created": "Sun, 17 Jun 2012 17:41:15 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Casals",
"Marc",
""
],
[
"Poisson",
"Eric",
""
],
[
"Vega",
"Ian",
""
]
] | Various regularization methods have been used to compute the self-force acting on a static particle in a static, curved spacetime. Many of these are based on Hadamard's two-point function in three dimensions. On the other hand, the regularization method that enjoys the best justification is that of Detweiler and Whitin... |
2208.03011 | Vittorio De Falco Dr | Salvatore Capozziello, Vittorio De Falco, Carmen Ferrara | Comparing Equivalent Gravities: common features and differences | 30 pages, 6 figures | null | 10.1140/epjc/s10052-022-10823-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss equivalent representations of gravity in the framework of
metric-affine geometries pointing out basic concepts from where these theories
stem out. In particular, we take into account tetrads and spin connection to
describe the so called {\it Geometric Trinity of Gravity}. Specifically, we
consider General ... | [
{
"created": "Fri, 5 Aug 2022 06:58:34 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Dec 2022 10:08:33 GMT",
"version": "v2"
}
] | 2022-12-06 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Falco",
"Vittorio",
""
],
[
"Ferrara",
"Carmen",
""
]
] | We discuss equivalent representations of gravity in the framework of metric-affine geometries pointing out basic concepts from where these theories stem out. In particular, we take into account tetrads and spin connection to describe the so called {\it Geometric Trinity of Gravity}. Specifically, we consider General Re... |
2308.13261 | Alexander Florian Jercher | Alexander F. Jercher, Luca Marchetti, Andreas G. A. Pithis | Scalar Cosmological Perturbations from Quantum Entanglement within
Lorentzian Quantum Gravity | 44 + 18 pages, 6 figures | Phys.Rev.D 109 (2024) 6 | 10.1103/PhysRevD.109.066021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the dynamics of (isotropic) scalar perturbations from the
mean-field hydrodynamics of full Lorentzian quantum gravity, as described by a
two-sector (timelike and spacelike) Barrett-Crane group field theory (GFT)
model. The rich causal structure of this model allows us to consistently
implement in the quantu... | [
{
"created": "Fri, 25 Aug 2023 09:25:40 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2024 21:13:06 GMT",
"version": "v2"
}
] | 2024-04-02 | [
[
"Jercher",
"Alexander F.",
""
],
[
"Marchetti",
"Luca",
""
],
[
"Pithis",
"Andreas G. A.",
""
]
] | We derive the dynamics of (isotropic) scalar perturbations from the mean-field hydrodynamics of full Lorentzian quantum gravity, as described by a two-sector (timelike and spacelike) Barrett-Crane group field theory (GFT) model. The rich causal structure of this model allows us to consistently implement in the quantum ... |
2308.01815 | Marie-No\"elle C\'el\'erier | M.-N. C\'el\'erier | Interior spacetimes sourced by stationary differentially rotating
irrotational cylindrical fluids. IV. Radial pressure | overlap with 2312.09263 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent series of papers new exact analytical solutions of the field
equations of General Relativity representing interior spacetimes sourced by
stationary rigidly rotating cylinders of fluids with various equations of state
have been displayed. This work is currently extended to the cases of
differentially rotat... | [
{
"created": "Thu, 3 Aug 2023 15:24:52 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jul 2024 15:29:34 GMT",
"version": "v2"
}
] | 2024-07-08 | [
[
"Célérier",
"M. -N.",
""
]
] | In a recent series of papers new exact analytical solutions of the field equations of General Relativity representing interior spacetimes sourced by stationary rigidly rotating cylinders of fluids with various equations of state have been displayed. This work is currently extended to the cases of differentially rotatin... |
2305.04829 | Sudipta Das | Sudipta Das | Ideal Gas Thermodynamics with an Invariant Energy Scale | 11 pages, 3 figures, submitted to journal for consideration | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A viable approach towards Quantum Gravity is the Doubly Special Relativity
(DSR) framework in which an observer-independent finite energy upper bound (or
a finite smallest length scale) appears quite naturally. In this work, we have
studied the thermodynamic properties of an ideal gas in a specific DSR
framework, kno... | [
{
"created": "Mon, 8 May 2023 16:25:58 GMT",
"version": "v1"
},
{
"created": "Thu, 18 May 2023 14:57:25 GMT",
"version": "v2"
}
] | 2023-05-19 | [
[
"Das",
"Sudipta",
""
]
] | A viable approach towards Quantum Gravity is the Doubly Special Relativity (DSR) framework in which an observer-independent finite energy upper bound (or a finite smallest length scale) appears quite naturally. In this work, we have studied the thermodynamic properties of an ideal gas in a specific DSR framework, known... |
gr-qc/9811012 | Hongsu Kim | Hongsu Kim | New Black Hole Solutions in Brans-Dicke Theory of Gravity | 20 pages, no figure, Revtex, version to appear in Phys. Rev. D | Phys.Rev. D60 (1999) 024001 | 10.1103/PhysRevD.60.024001 | null | gr-qc astro-ph hep-th | null | Existence check of non-trivial, stationary axisymmetric black hole solutions
in Brans-Dicke theory of gravity in different direction from those of Penrose,
Thorne and Dykla, and Hawking is performed. Namely, working directly with the
known explicit spacetime solutions in Brans-Dicke theory, it is found that
non-trivi... | [
{
"created": "Wed, 4 Nov 1998 07:23:17 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Nov 1998 03:06:06 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Mar 1999 00:51:16 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Kim",
"Hongsu",
""
]
] | Existence check of non-trivial, stationary axisymmetric black hole solutions in Brans-Dicke theory of gravity in different direction from those of Penrose, Thorne and Dykla, and Hawking is performed. Namely, working directly with the known explicit spacetime solutions in Brans-Dicke theory, it is found that non-trivial... |
1706.05673 | Javier Olmedo | Daniel Mart\'in de Blas, Javier Olmedo and Tomasz Paw{\l}owski | Loop quantization of the Gowdy model with local rotational symmetry | 19 pages, 1 fig | Phys. Rev. D 96, 106016 (2017) | 10.1103/PhysRevD.96.106016 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a full quantization of the vacuum Gowdy model with local
rotational symmetry. We consider a redefinition of the constraints where the
Hamiltonian Poisson-commutes with itself. We then apply the canonical
quantization program of loop quantum gravity within an improved dynamics
scheme. We identify the exact ... | [
{
"created": "Sun, 18 Jun 2017 15:47:27 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"de Blas",
"Daniel Martín",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Pawłowski",
"Tomasz",
""
]
] | We provide a full quantization of the vacuum Gowdy model with local rotational symmetry. We consider a redefinition of the constraints where the Hamiltonian Poisson-commutes with itself. We then apply the canonical quantization program of loop quantum gravity within an improved dynamics scheme. We identify the exact so... |
gr-qc/0511125 | Muhammad Sharif | M. Sharif | Matter Inheritance Symmetries of Spherically Symmetric Static Spacetimes | 15 pages, accepted for publication in Int. J. of Mod. Phys. A | Int.J.Mod.Phys.A21:2645-2657,2006 | 10.1142/S0217751X06029430 | null | gr-qc | null | In this paper we discuss matter inheritance collineations by giving a
complete classification of spherically symmetric static spacetimes by their
matter inheritance symmetries. It is shown that when the energy-momentum tensor
is degenerate, most of the cases yield infinite dimensional matter inheriting
symmetries. It... | [
{
"created": "Wed, 23 Nov 2005 10:30:07 GMT",
"version": "v1"
}
] | 2010-11-05 | [
[
"Sharif",
"M.",
""
]
] | In this paper we discuss matter inheritance collineations by giving a complete classification of spherically symmetric static spacetimes by their matter inheritance symmetries. It is shown that when the energy-momentum tensor is degenerate, most of the cases yield infinite dimensional matter inheriting symmetries. It i... |
1504.01251 | Ifra Noureen | Ifra Noureen, M. Zubair, A.A. Bhatti, G. Abbas | Shearfree Condition and dynamical Instability in $f(R,T)$ gravity | 16 pages | Eur. Phys. J. C (2015) 75: 323 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The implications of shearfree condition on instability range of anisotropic
fluid in $f(R,T)$ are studied in this manuscript. A viable $f(R, T)$ model is
chosen to arrive at stability criterion, where $R$ is Ricci scalar and $T$ is
the trace of energy momentum tensor. The evolution of spherical star is
explored by em... | [
{
"created": "Mon, 6 Apr 2015 10:11:40 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2015 11:34:44 GMT",
"version": "v2"
}
] | 2015-07-29 | [
[
"Noureen",
"Ifra",
""
],
[
"Zubair",
"M.",
""
],
[
"Bhatti",
"A. A.",
""
],
[
"Abbas",
"G.",
""
]
] | The implications of shearfree condition on instability range of anisotropic fluid in $f(R,T)$ are studied in this manuscript. A viable $f(R, T)$ model is chosen to arrive at stability criterion, where $R$ is Ricci scalar and $T$ is the trace of energy momentum tensor. The evolution of spherical star is explored by empl... |
0807.0439 | Tomislav Prokopec | Tomas Janssen, Shun-Pei Miao, Tomislav Prokopec (ITP, Utrecht
University) | Graviton one-loop effective action and inflationary dynamics | 25 pages, 3 figures | null | null | ITP-UU-80/45, SPIN-08/32 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the one-loop effective action due to gravitons in a FLRW
background with constant epsilon=-(dH/dt)/H^2. By expanding around epsilon=0
(corresponding to an expansion around de Sitter space), we can study how the
deviation from de Sitter space effects the quantum corrected Friedmann
equations. We find that,... | [
{
"created": "Wed, 2 Jul 2008 20:31:43 GMT",
"version": "v1"
}
] | 2008-07-04 | [
[
"Janssen",
"Tomas",
"",
"ITP, Utrecht\n University"
],
[
"Miao",
"Shun-Pei",
"",
"ITP, Utrecht\n University"
],
[
"Prokopec",
"Tomislav",
"",
"ITP, Utrecht\n University"
]
] | We consider the one-loop effective action due to gravitons in a FLRW background with constant epsilon=-(dH/dt)/H^2. By expanding around epsilon=0 (corresponding to an expansion around de Sitter space), we can study how the deviation from de Sitter space effects the quantum corrected Friedmann equations. We find that, a... |
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