id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2112.06952 | Antoni Ramos-Buades | Antoni Ramos-Buades, Alessandra Buonanno, Mohammed Khalil, Serguei
Ossokine | Effective-one-body multipolar waveforms for eccentric binary black holes
with non-precessing spins | Version accepted for publication in PRD | null | 10.1103/PhysRevD.105.044035 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct an inspiral-merger-ringdown eccentric gravitational-wave (GW)
model for binary black holes with non-precessing spins within the
effective-one-body formalism. This waveform model, SEOBNRv4EHM, extends the
accurate quasi-circular SEOBNRv4HM model to eccentric binaries by including
recently computed eccentr... | [
{
"created": "Mon, 13 Dec 2021 19:00:11 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2022 07:54:06 GMT",
"version": "v2"
}
] | 2022-03-02 | [
[
"Ramos-Buades",
"Antoni",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Khalil",
"Mohammed",
""
],
[
"Ossokine",
"Serguei",
""
]
] | We construct an inspiral-merger-ringdown eccentric gravitational-wave (GW) model for binary black holes with non-precessing spins within the effective-one-body formalism. This waveform model, SEOBNRv4EHM, extends the accurate quasi-circular SEOBNRv4HM model to eccentric binaries by including recently computed eccentric... |
1811.01728 | Valerio Faraoni | Valerio Faraoni and Jeremy C\^ot\'e | Two new approaches to the anomalous limit of Brans-Dicke to Einstein
gravity | Explanation and bibliography expanded, matches version published in
Phys. Rev. D | Phys. Rev. D 99, 064013 (2019) | 10.1103/PhysRevD.99.064013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Contrary to common belief, (electro)vacuum Brans-Dicke gravity does not
reduce to general relativity for large Brans-Dicke coupling $\omega$, a problem
which has never been fully solved. Two new approaches, independent from each
other, shed light on this issue producing the same result: in the limit $\omega
\rightarr... | [
{
"created": "Mon, 5 Nov 2018 14:32:24 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Mar 2019 20:35:46 GMT",
"version": "v2"
}
] | 2019-03-27 | [
[
"Faraoni",
"Valerio",
""
],
[
"Côté",
"Jeremy",
""
]
] | Contrary to common belief, (electro)vacuum Brans-Dicke gravity does not reduce to general relativity for large Brans-Dicke coupling $\omega$, a problem which has never been fully solved. Two new approaches, independent from each other, shed light on this issue producing the same result: in the limit $\omega \rightarrow... |
gr-qc/9502001 | null | Sean A. Hayward | COMMENT ON ``BOUNDARY CONDITIONS FOR THE SCALAR FIELD IN THE PRESENCE OF
SIGNATURE CHANGE'' | 4 pages. TeX. | null | null | null | gr-qc | null | Fundamental errors exist in the above-mentioned article, which attempts to
justify previous erroneous claims concerning signature change. In the simplest
example, the authors' proposed ``solutions'' do not satisfy the relevant
equation, as may be checked by substitution. These ``solutions'' are also
different to the ... | [
{
"created": "Wed, 1 Feb 1995 08:24:13 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Hayward",
"Sean A.",
""
]
] | Fundamental errors exist in the above-mentioned article, which attempts to justify previous erroneous claims concerning signature change. In the simplest example, the authors' proposed ``solutions'' do not satisfy the relevant equation, as may be checked by substitution. These ``solutions'' are also different to the au... |
gr-qc/0309035 | Seth A. Major | Franz Hinterleitner and Seth Major | Isotropic Loop Quantum Cosmology with Matter II: The Lorentzian
Constraint | 19 pages, 4 figures | Phys.Rev. D68 (2003) 124023 | 10.1103/PhysRevD.68.124023 | null | gr-qc | null | The Lorentzian Hamiltonian constraint is solved for isotropic loop quantum
cosmology coupled to a massless scalar field. As in the Euclidean case, the
discreteness of quantum geometry removes the classical singularity from the
quantum Friedmann models. In spite of the absence of the classical singularity,
a modified ... | [
{
"created": "Fri, 5 Sep 2003 20:29:04 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hinterleitner",
"Franz",
""
],
[
"Major",
"Seth",
""
]
] | The Lorentzian Hamiltonian constraint is solved for isotropic loop quantum cosmology coupled to a massless scalar field. As in the Euclidean case, the discreteness of quantum geometry removes the classical singularity from the quantum Friedmann models. In spite of the absence of the classical singularity, a modified De... |
gr-qc/0512077 | Nathalie Deruelle | Nathalie Deruelle and Joseph Katz | Comments on conformal masses, asymptotics backgrounds and conservation
laws | accepted for publication by Class. and Quant. Grav Note added in
Proof | Class.Quant.Grav. 23 (2006) 753-760 | 10.1088/0264-9381/23/3/013 | null | gr-qc hep-th | null | The "conformal mass prescriptions" were used recently to calculate the mass
of spacetimes in higher dimensional and higher curvature theories of gravity.
These definitions are closely related to Komar integrals for spacetimes that
are conformally flat at great distances from the sources. We derive these
relations wit... | [
{
"created": "Tue, 13 Dec 2005 16:16:45 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jan 2006 14:54:54 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Deruelle",
"Nathalie",
""
],
[
"Katz",
"Joseph",
""
]
] | The "conformal mass prescriptions" were used recently to calculate the mass of spacetimes in higher dimensional and higher curvature theories of gravity. These definitions are closely related to Komar integrals for spacetimes that are conformally flat at great distances from the sources. We derive these relations witho... |
2012.02583 | Matteo Galaverni | Matteo Galaverni, Gabriele Gionti S.J. | Photon helicity and quantum anomalies in curved spacetimes | Accepted for publication in General Relativity and Gravitation:
changed to correspond to the proof-read version | Gen Relativ Gravit 53, 46 (2021) | 10.1007/s10714-021-02817-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare several definitions of photon helicity (magnetic, electric,
electromagnetic) present in literature. In curved spacetime quantum anomalies
can spoil helicity conservation inducing, according to these definitions,
different effects on photons: either rotation of linear polarization or
production of circular ... | [
{
"created": "Wed, 2 Dec 2020 10:15:31 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2020 15:38:51 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Apr 2021 17:10:22 GMT",
"version": "v3"
}
] | 2023-06-02 | [
[
"Galaverni",
"Matteo",
""
],
[
"J.",
"Gabriele Gionti S.",
""
]
] | We compare several definitions of photon helicity (magnetic, electric, electromagnetic) present in literature. In curved spacetime quantum anomalies can spoil helicity conservation inducing, according to these definitions, different effects on photons: either rotation of linear polarization or production of circular po... |
gr-qc/9403041 | Jorma Louko | Jorma Louko and Donald Marolf | Global structure of Witten's 2+1 gravity on ${\bf R}\times T^2$ | 3 pages, LaTeX. CGPG-94/3-2, WISC-MILW-94-TH-12 | null | null | null | gr-qc hep-th | null | We investigate the space ${\cal M}$ of classical solutions to Witten's
formulation of 2+1 gravity on the manifold ${\bf R} \times T^2$. ${\cal M}$ is
connected, but neither Hausdorff nor a manifold. However, removing from ${\cal
M}$ a set of measure zero yields a connected manifold which is naturally viewed
as the co... | [
{
"created": "Mon, 21 Mar 1994 15:39:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Louko",
"Jorma",
""
],
[
"Marolf",
"Donald",
""
]
] | We investigate the space ${\cal M}$ of classical solutions to Witten's formulation of 2+1 gravity on the manifold ${\bf R} \times T^2$. ${\cal M}$ is connected, but neither Hausdorff nor a manifold. However, removing from ${\cal M}$ a set of measure zero yields a connected manifold which is naturally viewed as the cota... |
gr-qc/0004057 | Waseem Kamleh | Waseem Kamleh | Signature Changing Space-times and the New Generalised Functions | 19 pages; Section on point-values has been changed, other related and
minor changes; Conclusion and focus are essentially the same | null | null | null | gr-qc | null | A signature changing spacetime is one where an initially Riemannian manifold
with Euclidean signature evolves into the Lorentzian universe we see today.
This concept is motivated by problems in causality implied by the isotropy and
homogeneity of the universe. As initially time and space are indistinguishable
in sign... | [
{
"created": "Tue, 18 Apr 2000 05:10:14 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2000 04:12:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kamleh",
"Waseem",
""
]
] | A signature changing spacetime is one where an initially Riemannian manifold with Euclidean signature evolves into the Lorentzian universe we see today. This concept is motivated by problems in causality implied by the isotropy and homogeneity of the universe. As initially time and space are indistinguishable in signat... |
1909.08751 | Stanley Deser | S. Deser | Why does D=4, rather than more (or less)? An Orwellian explanation | For Mike Duff, friend, collaborator, eminent theoretician, peerless
Defender of the Faith, on his 70th. Minor clarifications for published
version. Final typos corrected | Proc Roy Soc A 476 20190632(2020) | 10.1098/rspa.2019.0632 | BRX-TH 6656, Calt-TH 2019-037 CALT-TH 2019-037 | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two simple, if Draconian, assumptions about classical gravity fix
space-time's dimension at D=4
| [
{
"created": "Thu, 19 Sep 2019 00:46:45 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Sep 2019 05:14:02 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Dec 2019 23:27:04 GMT",
"version": "v3"
},
{
"created": "Sun, 29 Mar 2020 19:55:28 GMT",
"version": "v4"
}
] | 2022-12-08 | [
[
"Deser",
"S.",
""
]
] | Two simple, if Draconian, assumptions about classical gravity fix space-time's dimension at D=4 |
1111.2740 | Jorge Paramos | J. P\'aramos | Testing a non-minimal coupling between matter and curvature | 11 pages, 3 figures. To appear in the Proceedings of the "QSO
Astrophysics, Fundamental physics, and Astrometric Cosmology in the Gaia era"
GREAT-ESF Workshop, 6-9 June 2011, Faculdade de Ci\^encias da Universidade do
Porto, Portugal | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the most interesting and current phenomenological extensions of
General Relativity is the so-called $f (R)$ class of theories; a natural
generalization of this includes an explicit non-minimal coupling between matter
and curvature. The purpose of this work is to present a unified view of the
applicability of t... | [
{
"created": "Fri, 11 Nov 2011 13:45:02 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2011 21:37:40 GMT",
"version": "v2"
}
] | 2011-11-16 | [
[
"Páramos",
"J.",
""
]
] | One of the most interesting and current phenomenological extensions of General Relativity is the so-called $f (R)$ class of theories; a natural generalization of this includes an explicit non-minimal coupling between matter and curvature. The purpose of this work is to present a unified view of the applicability of the... |
0804.1161 | Antony Searle | Antony C. Searle | Monte-Carlo and Bayesian techniques in gravitational wave burst data
analysis | 9 pages, submitted to GWDAW12 proceedings | null | null | LIGO-P080034-00-Z | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Monte-Carlo simulations are used in the gravitational wave burst detection
community to demonstrate and compare the properties of different search
techniques. We note that every Monte-Carlo simulation has a corresponding
optimal search technique according to both the non-Bayesian Neyman-Pearson
criterion and the Baye... | [
{
"created": "Mon, 7 Apr 2008 23:44:06 GMT",
"version": "v1"
}
] | 2008-04-09 | [
[
"Searle",
"Antony C.",
""
]
] | Monte-Carlo simulations are used in the gravitational wave burst detection community to demonstrate and compare the properties of different search techniques. We note that every Monte-Carlo simulation has a corresponding optimal search technique according to both the non-Bayesian Neyman-Pearson criterion and the Bayesi... |
0904.4811 | Richard Woodard | E. O. Kahya (Koc University), V. K. Onemli (Koc University), R. P.
Woodard (University of Florida) | A Completely Regular Quantum Stress Tensor with $w < -1$ | 23 pages, 1 figure | Phys.Rev.D81:023508,2010 | 10.1103/PhysRevD.81.023508 | UFIFT-QG-09-04 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For many quantum field theory computations in cosmology it is not possible to
use the flat space trick of obtaining full, interacting states by evolving free
states over infinite times. State wave functionals must be specified at finite
times and, although the free states suffice to obtain the lowest order effects,
h... | [
{
"created": "Thu, 30 Apr 2009 12:56:48 GMT",
"version": "v1"
}
] | 2010-01-22 | [
[
"Kahya",
"E. O.",
"",
"Koc University"
],
[
"Onemli",
"V. K.",
"",
"Koc University"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | For many quantum field theory computations in cosmology it is not possible to use the flat space trick of obtaining full, interacting states by evolving free states over infinite times. State wave functionals must be specified at finite times and, although the free states suffice to obtain the lowest order effects, hig... |
2309.15138 | Albert Huber | Albert Huber | Quasilocal Corrections to Bondi's Mass-Loss Formula and Dynamical
Horizons | 26 pages, 1 Figure, to be published in PRD | PRD 2023 | 10.1103/PhysRevD.108.084056 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, a null geometric approach to the Brown-York quasilocal
formalism is used to derive an integral law that describes the rate of change
of mass and/or radiative energy escaping through a dynamical horizon of a
non-stationary spacetime. The result thus obtained shows - in accordance with
previous results fr... | [
{
"created": "Tue, 26 Sep 2023 15:21:09 GMT",
"version": "v1"
}
] | 2023-10-26 | [
[
"Huber",
"Albert",
""
]
] | In this work, a null geometric approach to the Brown-York quasilocal formalism is used to derive an integral law that describes the rate of change of mass and/or radiative energy escaping through a dynamical horizon of a non-stationary spacetime. The result thus obtained shows - in accordance with previous results from... |
1212.6655 | Sunil Maharaj | A. M. Msomi, K. S. Govinder, S. D. Maharaj | New shear-free relativistic models with heat flow | 10 pages, To appear in Gen. Relativ. Gravit | Gen. Relativ. Gravit. 43: 1685-1696, 2011 | 10.1007/s10714-011-1150-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study shear-free spherically symmetric relativistic models with heat flow.
Our analysis is based on Lie's theory of extended groups applied to the
governing field equations. In particular, we generate a five-parameter family
of transformations which enables us to map existing solutions to new solutions.
All known ... | [
{
"created": "Sat, 29 Dec 2012 19:05:53 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Msomi",
"A. M.",
""
],
[
"Govinder",
"K. S.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We study shear-free spherically symmetric relativistic models with heat flow. Our analysis is based on Lie's theory of extended groups applied to the governing field equations. In particular, we generate a five-parameter family of transformations which enables us to map existing solutions to new solutions. All known so... |
1111.7082 | Ovidiu Cristinel Stoica | Ovidiu-Cristinel Stoica | Kerr-Newman Solutions with Analytic Singularity and no Closed Timelike
Curves | null | U.P.B. Sci Bull. Series A, 77(1) (2015) | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the Kerr-Newman solution, representing charged and rotating
stationary black holes, admits analytic extension at the singularity. This
extension is obtained by using new coordinates, in which the metric tensor
becomes smooth on the singularity ring. On the singularity, the metric is
degenerale - its ... | [
{
"created": "Wed, 30 Nov 2011 08:53:33 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2012 16:11:25 GMT",
"version": "v2"
}
] | 2017-01-31 | [
[
"Stoica",
"Ovidiu-Cristinel",
""
]
] | It is shown that the Kerr-Newman solution, representing charged and rotating stationary black holes, admits analytic extension at the singularity. This extension is obtained by using new coordinates, in which the metric tensor becomes smooth on the singularity ring. On the singularity, the metric is degenerale - its de... |
0901.3640 | Richard Obousy Dr. | Richard K. Obousy | Investigation into Compactified Dimensions: Casimir Energies and
Phenomenological Aspects | Ph.D dissertation. 147 pages, 16 figures, 3 tables, accepted December
2008 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The primary focus of this dissertation is the study of the Casimir effect and
the possibility that this phenomenon may serve as a mechanism to mediate higher
dimensional stability, and also as a possible mechanism for creating a small
but non-zero vacuum energy density. In chapter one we review the nature of the
quan... | [
{
"created": "Fri, 23 Jan 2009 20:11:24 GMT",
"version": "v1"
}
] | 2009-01-26 | [
[
"Obousy",
"Richard K.",
""
]
] | The primary focus of this dissertation is the study of the Casimir effect and the possibility that this phenomenon may serve as a mechanism to mediate higher dimensional stability, and also as a possible mechanism for creating a small but non-zero vacuum energy density. In chapter one we review the nature of the quantu... |
2310.00312 | Bayram Tekin | Metin Gurses, Bayram Tekin | Kerr-Vaidya type radiating black holes in semi-classical gravity with
conformal anomaly | 12 pages,matches the published version | Phys.Rev.D 109 (2024) 2, 024001 | 10.1103/PhysRevD.109.024001 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | Static black holes in the conformal anomaly-sourced semi-classical General
Relativity in four dimensions were extended to rotating, stationary solutions,
recently. These quantum-corrected black holes show different features compared
to the Kerr black hole and need for further extensions. Here we remove the
condition ... | [
{
"created": "Sat, 30 Sep 2023 08:53:31 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2024 08:29:41 GMT",
"version": "v2"
}
] | 2024-01-17 | [
[
"Gurses",
"Metin",
""
],
[
"Tekin",
"Bayram",
""
]
] | Static black holes in the conformal anomaly-sourced semi-classical General Relativity in four dimensions were extended to rotating, stationary solutions, recently. These quantum-corrected black holes show different features compared to the Kerr black hole and need for further extensions. Here we remove the condition of... |
gr-qc/9710106 | Zerbini Sergio | A.A. Bytsenko, L. Vanzo and S. Zerbini | Quantum Correction to the Entropy of the (2+1)-Dimensional Black Hole | 14 pages, Latex, one new reference added | Phys.Rev. D57 (1998) 4917-4924 | 10.1103/PhysRevD.57.4917 | null | gr-qc hep-th | null | The thermodynamic properties of the (2+1)-dimensional non-rotating black hole
of Ba\~nados, Teitelboim and Zanelli are discussed. The first quantum
correction to the Bekenstein-Hawking entropy is evaluated within the on-shell
Euclidean formalism, making use of the related Chern-Simons representation of
the 3-dimensio... | [
{
"created": "Wed, 22 Oct 1997 14:40:50 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Oct 1997 13:44:20 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Bytsenko",
"A. A.",
""
],
[
"Vanzo",
"L.",
""
],
[
"Zerbini",
"S.",
""
]
] | The thermodynamic properties of the (2+1)-dimensional non-rotating black hole of Ba\~nados, Teitelboim and Zanelli are discussed. The first quantum correction to the Bekenstein-Hawking entropy is evaluated within the on-shell Euclidean formalism, making use of the related Chern-Simons representation of the 3-dimensiona... |
gr-qc/9306005 | null | Mirjam Cveti\v{c}, Stephen Griffies, and Harald H. Soleng | Local and global gravitational aspects of domain wall space-times | UPR-565-T, 26 REVTEX pages, 10 figures available upon request | Phys.Rev.D48:2613-2634,1993 | 10.1103/PhysRevD.48.2613 | null | gr-qc hep-th | null | Local and global gravitational effects induced by eternal vacuum domain walls
are studied. We concentrate on thin walls between non-equal and non-positive
cosmological constants on each side of the wall. These vacuum domain walls fall
in three classes depending on the value of their energy density $\sigma$: (1)\
extr... | [
{
"created": "Wed, 2 Jun 1993 15:07:24 GMT",
"version": "v1"
}
] | 2009-09-17 | [
[
"Cvetič",
"Mirjam",
""
],
[
"Griffies",
"Stephen",
""
],
[
"Soleng",
"Harald H.",
""
]
] | Local and global gravitational effects induced by eternal vacuum domain walls are studied. We concentrate on thin walls between non-equal and non-positive cosmological constants on each side of the wall. These vacuum domain walls fall in three classes depending on the value of their energy density $\sigma$: (1)\ extrem... |
0704.0007 | Alejandro Corichi | Alejandro Corichi, Tatjana Vukasinac and Jose A. Zapata | Polymer Quantum Mechanics and its Continuum Limit | 16 pages, no figures. Typos corrected to match published version | Phys.Rev.D76:044016,2007 | 10.1103/PhysRevD.76.044016 | IGPG-07/03-2 | gr-qc | null | A rather non-standard quantum representation of the canonical commutation
relations of quantum mechanics systems, known as the polymer representation has
gained some attention in recent years, due to its possible relation with Planck
scale physics. In particular, this approach has been followed in a symmetric
sector ... | [
{
"created": "Sat, 31 Mar 2007 04:27:22 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Aug 2007 22:42:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
],
[
"Vukasinac",
"Tatjana",
""
],
[
"Zapata",
"Jose A.",
""
]
] | A rather non-standard quantum representation of the canonical commutation relations of quantum mechanics systems, known as the polymer representation has gained some attention in recent years, due to its possible relation with Planck scale physics. In particular, this approach has been followed in a symmetric sector of... |
2107.12531 | Takuya Tsutsui | Takuya Tsutsui, Atsushi Nishizawa, Soichiro Morisaki | Early warning of precessing neutron-star black-hole binary mergers with
the near-future gravitational-wave detectors | MNRAS version (change author names) | null | 10.1093/mnras/stac715 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since gravitational and electromagnetic waves from a compact binary
coalescence carry independent information about the source, the joint
observation is important for understanding the physical mechanisms of the
emissions. Rapid detection and source localization of a gravitational wave
signal are crucial for the join... | [
{
"created": "Tue, 27 Jul 2021 00:46:27 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2022 06:40:39 GMT",
"version": "v2"
},
{
"created": "Fri, 6 May 2022 00:42:20 GMT",
"version": "v3"
}
] | 2022-05-09 | [
[
"Tsutsui",
"Takuya",
""
],
[
"Nishizawa",
"Atsushi",
""
],
[
"Morisaki",
"Soichiro",
""
]
] | Since gravitational and electromagnetic waves from a compact binary coalescence carry independent information about the source, the joint observation is important for understanding the physical mechanisms of the emissions. Rapid detection and source localization of a gravitational wave signal are crucial for the joint ... |
1901.04308 | Z. Yousaf | M. Ilyas, Z. Yousaf, M. Z. Bhatti | Bounds on Higher Derivative $f(R,\square R,T)$ Models from Energy
Conditions | 11 pages, 8 figures, version accepted for publication in the Modern
Physics Letters A | Mod. Phys. Lett. A 34, 1950082 (2019) | 10.1142/S0217732319500822 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper studies the viable regions of some cosmic models in a higher
derivative $f(R,\square R, T)$ theory with the help of energy conditions (where
$R$ and $T$ are the Ricci scalar, and trace of energy momentum tensor,
respectively). For this purpose, we assume a flat
Friedmann-Lema\^{i}tre-Robertson-Walker metri... | [
{
"created": "Wed, 9 Jan 2019 03:22:14 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jan 2019 03:06:16 GMT",
"version": "v2"
}
] | 2020-03-03 | [
[
"Ilyas",
"M.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Bhatti",
"M. Z.",
""
]
] | This paper studies the viable regions of some cosmic models in a higher derivative $f(R,\square R, T)$ theory with the help of energy conditions (where $R$ and $T$ are the Ricci scalar, and trace of energy momentum tensor, respectively). For this purpose, we assume a flat Friedmann-Lema\^{i}tre-Robertson-Walker metric ... |
2402.18785 | Wagno Cesar E Silva | Wagno Cesar e Silva and Ilya L. Shapiro | On the semiclassical bounce with strong minimal assumptions | 14 pages, 3 figures. Added discussion related to the energy
conditions and some references | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore the possibility of avoiding cosmological singularity with a bounce
solution in the early Universe. The main finding is that simple and well-known
semiclassical correction, which describes the mixing of radiation and gravity
in the effective action, may provide an analytic solution with a bounce. The
soluti... | [
{
"created": "Thu, 29 Feb 2024 01:18:43 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Apr 2024 15:14:35 GMT",
"version": "v2"
}
] | 2024-04-29 | [
[
"Silva",
"Wagno Cesar e",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | We explore the possibility of avoiding cosmological singularity with a bounce solution in the early Universe. The main finding is that simple and well-known semiclassical correction, which describes the mixing of radiation and gravity in the effective action, may provide an analytic solution with a bounce. The solution... |
2110.10424 | Horacio Vieira | H. S. Vieira | On the Schwarzschild-Anti-de Sitter black hole with an f(R) global
monopole | 13 pages, 7 figures | Eur. Phys. J. C (2021) 81:1143 | 10.1140/epjc/s10052-021-09961-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we follow the recently revisited f(R) theory of gravity for
studying the interaction between quantum scalar particles and the gravitational
field of a generalized black hole with an f(R) global monopole. This background
has a term playing the role of an effective cosmological constant, which
permits us ... | [
{
"created": "Wed, 20 Oct 2021 08:21:24 GMT",
"version": "v1"
}
] | 2022-01-04 | [
[
"Vieira",
"H. S.",
""
]
] | In this work, we follow the recently revisited f(R) theory of gravity for studying the interaction between quantum scalar particles and the gravitational field of a generalized black hole with an f(R) global monopole. This background has a term playing the role of an effective cosmological constant, which permits us to... |
1004.3240 | Benjamin Koch | Benjamin Koch | Geometrizing the Quantum - A Toy Model | Talk given the XXV Max Born Symposium, 6 pages, no figure | AIP Conf. Proc. 1196, 161 (2009) | 10.1063/1.3284379 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the equations of relativistic Bohmian mechanics for multiple
bosonic particles have a dual description in terms of a classical theory of
conformally "curved" space-time. This shows that it is possible to formulate
quantum mechanics as a purely classical geometrical theory. The results are
further gen... | [
{
"created": "Mon, 19 Apr 2010 16:13:03 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Koch",
"Benjamin",
""
]
] | It is shown that the equations of relativistic Bohmian mechanics for multiple bosonic particles have a dual description in terms of a classical theory of conformally "curved" space-time. This shows that it is possible to formulate quantum mechanics as a purely classical geometrical theory. The results are further gener... |
2003.08665 | Vijay Singh Dr. | Vijay Singh and Aroonkumar Beesham | Plane symmetric model in $f(R,T)$ gravity | 11 pages | Eur. Phys. J. Plus 135, 319 (2020) | 10.1140/epjp/s13360-020-00314-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A plane symmetric Bianchi-I model is explored in $f(R,T)$ gravity, where $R$
is the Ricci scalar and $T$ is the trace of energy-momentum tensor. The
solutions are obtained with the consideration of a specific Hubble parameter
which yields a constant deceleration parameter. The various evolutionary phases
are identifi... | [
{
"created": "Thu, 19 Mar 2020 10:31:26 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Mar 2020 07:30:51 GMT",
"version": "v2"
}
] | 2020-03-23 | [
[
"Singh",
"Vijay",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | A plane symmetric Bianchi-I model is explored in $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of energy-momentum tensor. The solutions are obtained with the consideration of a specific Hubble parameter which yields a constant deceleration parameter. The various evolutionary phases are identified... |
gr-qc/9301008 | Gary Horowitz | Gary T. Horowitz | What is the True Description of Charged Black Holes? | 15 pages, harvmac, UCSBTH-92-52 | null | null | null | gr-qc hep-th | null | If string theory describes nature, then charged black holes are not described
by the Reissner-Nordstrom solution. This solution must be modified to include a
massive dilaton. In the limit of vanishing dilaton mass, the new solution can
be found by a generalization of the Harrison transformation for the
Einstein-Maxwe... | [
{
"created": "Tue, 12 Jan 1993 01:18:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Horowitz",
"Gary T.",
""
]
] | If string theory describes nature, then charged black holes are not described by the Reissner-Nordstrom solution. This solution must be modified to include a massive dilaton. In the limit of vanishing dilaton mass, the new solution can be found by a generalization of the Harrison transformation for the Einstein-Maxwell... |
1812.01590 | Christos Karathanasis | Christos Karathanasis, Theocharis Apostolatos | Gravitational solitons on Kasner background revisited: The simplest
solitons with physical context | null | null | 10.1088/1361-6382/ab23c2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revise the one-pair complex poles soliton solutions on a Kasner
background. In the literature, these were rejected as solutions with no
cosmological interest due to singularities that supposedly show up at
space-like infinity. The only accepted solutions of this kind were those with
background metric parameter $d=... | [
{
"created": "Tue, 4 Dec 2018 18:46:40 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Apr 2019 16:26:58 GMT",
"version": "v2"
}
] | 2019-07-17 | [
[
"Karathanasis",
"Christos",
""
],
[
"Apostolatos",
"Theocharis",
""
]
] | We revise the one-pair complex poles soliton solutions on a Kasner background. In the literature, these were rejected as solutions with no cosmological interest due to singularities that supposedly show up at space-like infinity. The only accepted solutions of this kind were those with background metric parameter $d=\p... |
2401.00098 | Adailton Ara\'ujo Filho | A. A. Ara\'ujo Filho, J. A. A. S. Reis, L. Lisboa-Santos | An anisotropic rotating cosmic string with Lorentz violation:
thermodynamics and Landau levels | 19 pages and 2 figures | The European Physical Journal Plus, 139, 438 (2024) | 10.1140/epjp/s13360-024-05232-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we generalize the spacetime induced by a rotating cosmic
string, taking into account anisotropic effects due the breaking of the Lorentz
violation. In particular, we explore the energy levels of a massive spinless
particle that is covariantly coupled to a uniform magnetic field aligned with
the string. ... | [
{
"created": "Fri, 29 Dec 2023 23:33:56 GMT",
"version": "v1"
}
] | 2024-05-27 | [
[
"Filho",
"A. A. Araújo",
""
],
[
"Reis",
"J. A. A. S.",
""
],
[
"Lisboa-Santos",
"L.",
""
]
] | In this work, we generalize the spacetime induced by a rotating cosmic string, taking into account anisotropic effects due the breaking of the Lorentz violation. In particular, we explore the energy levels of a massive spinless particle that is covariantly coupled to a uniform magnetic field aligned with the string. Su... |
1512.05233 | Aur\'elien Hees | A. Hees and O. Minazzoli | Post-Newtonian phenomenology of a massless dilaton | 27 pages, comments welcome | null | null | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present extensively the observational consequences of
massless dilaton theories at the post-Newtonian level. We extend previous work
by considering a general model including a dilaton-Ricci coupling as well as a
general dilaton kinetic term while using the microphysical dilaton-matter
coupling model... | [
{
"created": "Wed, 16 Dec 2015 16:26:34 GMT",
"version": "v1"
}
] | 2015-12-17 | [
[
"Hees",
"A.",
""
],
[
"Minazzoli",
"O.",
""
]
] | In this paper, we present extensively the observational consequences of massless dilaton theories at the post-Newtonian level. We extend previous work by considering a general model including a dilaton-Ricci coupling as well as a general dilaton kinetic term while using the microphysical dilaton-matter coupling model p... |
2203.15035 | Che-Yu Chen | Che-Yu Chen, Yakefu Reyimuaji, Xinyi Zhang | Slow-roll inflation in $f(R,T)$ gravity with a $RT$ mixing term | 17 pages, 4 figures, updated to match the published version | null | 10.1016/j.dark.2022.101130 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider slow-roll inflationary models in a class of modified theories of
gravity which contains non-minimal curvature-inflaton couplings, i.e., the
$f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of the
inflaton energy-momentum tensor. On top of the minimally coupled $T$ that has
been widely ... | [
{
"created": "Mon, 28 Mar 2022 18:59:14 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2022 06:27:42 GMT",
"version": "v2"
}
] | 2022-11-07 | [
[
"Chen",
"Che-Yu",
""
],
[
"Reyimuaji",
"Yakefu",
""
],
[
"Zhang",
"Xinyi",
""
]
] | We consider slow-roll inflationary models in a class of modified theories of gravity which contains non-minimal curvature-inflaton couplings, i.e., the $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of the inflaton energy-momentum tensor. On top of the minimally coupled $T$ that has been widely in... |
1906.05090 | Maarten van de Meent | Maarten van de Meent | Analytic solutions for parallel transport along generic bound geodesics
in Kerr spacetime | null | null | 10.1088/1361-6382/ab79d5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide analytical closed form solutions for the parallel transport along
a bound geodesic in Kerr spacetime. This can be considered the lowest order
approximation for the motion a spinning black hole in an extreme mass-ratio
inspiral. As an illustration of the usefulness of our new found expressions we
scope out ... | [
{
"created": "Wed, 12 Jun 2019 12:40:28 GMT",
"version": "v1"
}
] | 2020-08-26 | [
[
"van de Meent",
"Maarten",
""
]
] | We provide analytical closed form solutions for the parallel transport along a bound geodesic in Kerr spacetime. This can be considered the lowest order approximation for the motion a spinning black hole in an extreme mass-ratio inspiral. As an illustration of the usefulness of our new found expressions we scope out th... |
1712.02458 | Betti Hartmann | Yves Brihaye, Betti Hartmann, Jon Urrestilla | Solitons and black hole in shift symmetric scalar-tensor gravity with
cosmological constant | null | null | 10.1007/JHEP06(2018)074 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate the existence of static, spherically symmetric globally
regular, i.e. solitonic solutions of a shift-symmetric scalar-tensor gravity
model with negative cosmological constant. The norm of the Noether current
associated to the shift symmetry is finite in the full space-time. We also
discuss the correspo... | [
{
"created": "Thu, 7 Dec 2017 00:48:06 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Brihaye",
"Yves",
""
],
[
"Hartmann",
"Betti",
""
],
[
"Urrestilla",
"Jon",
""
]
] | We demonstrate the existence of static, spherically symmetric globally regular, i.e. solitonic solutions of a shift-symmetric scalar-tensor gravity model with negative cosmological constant. The norm of the Noether current associated to the shift symmetry is finite in the full space-time. We also discuss the correspond... |
2310.11039 | Diego Rubiera-Garcia | I. De Martino, R. Della Monica, D. Rubiera-Garcia | The optical appearance of a nonsingular de Sitter core black hole
geometry under several thin disk emissions | 12 pages, 5 figures | null | null | IPARCOS-UCM-23-122 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We consider the optical appearance under a thin accretion disk of a regular
black hole with a central de Sitter core implementing $\mathcal{O}(l^2/r^2)$
far-corrections to the Schwarzschild black hole. We use the choice $l=0.25M$,
which satisfies recently found constraints from the motion of the S2 star
around Sgr A$... | [
{
"created": "Tue, 17 Oct 2023 07:10:44 GMT",
"version": "v1"
}
] | 2023-10-19 | [
[
"De Martino",
"I.",
""
],
[
"Della Monica",
"R.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We consider the optical appearance under a thin accretion disk of a regular black hole with a central de Sitter core implementing $\mathcal{O}(l^2/r^2)$ far-corrections to the Schwarzschild black hole. We use the choice $l=0.25M$, which satisfies recently found constraints from the motion of the S2 star around Sgr A$^*... |
1208.2604 | Andrzej Krasi\'nski | Andrzej Krasi\'nski and Krzysztof Bolejko | Geometry of the quasi-hyperbolic Szekeres models | 19 pages, 13 figures. This version matches the published text | Phys. Rev. D86, 104036 (2012) | 10.1103/PhysRevD.86.104036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geometric properties of the quasi-hyperbolic Szekeres models are discussed
and related to the quasi-spherical Szekeres models. Typical examples of shapes
of various classes of 2-dimensional coordinate surfaces are shown in graphs;
for the hyperbolically symmetric subcase and for the general quasi-hyperbolic
case. An ... | [
{
"created": "Mon, 13 Aug 2012 14:51:31 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Aug 2012 11:52:56 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Dec 2012 16:01:02 GMT",
"version": "v3"
}
] | 2013-05-30 | [
[
"Krasiński",
"Andrzej",
""
],
[
"Bolejko",
"Krzysztof",
""
]
] | Geometric properties of the quasi-hyperbolic Szekeres models are discussed and related to the quasi-spherical Szekeres models. Typical examples of shapes of various classes of 2-dimensional coordinate surfaces are shown in graphs; for the hyperbolically symmetric subcase and for the general quasi-hyperbolic case. An an... |
1905.05085 | Sergey Yu. Vernov | Ekaterina O. Pozdeeva, Mohammad Sami, Alexey V. Toporensky, Sergey Yu.
Vernov | Stability analysis of de Sitter solutions in models with the
Gauss-Bonnet term | 9 pages, 5 figures, some references and comments are added, revised
version to appear in Phys. Rev. D | Phys. Rev. D 100, 083527 (2019) | 10.1103/PhysRevD.100.083527 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar field dynamics of models with nonminimally coupled
scalar fields in the presence of the Gauss-Bonnet term and derive the structure
of the effective potential and conditions for stable de Sitter solutions in
general. Specializing to specific couplings, we explore the possibility of
realizing ... | [
{
"created": "Mon, 13 May 2019 15:27:20 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Oct 2019 20:27:12 GMT",
"version": "v2"
}
] | 2019-10-21 | [
[
"Pozdeeva",
"Ekaterina O.",
""
],
[
"Sami",
"Mohammad",
""
],
[
"Toporensky",
"Alexey V.",
""
],
[
"Vernov",
"Sergey Yu.",
""
]
] | We investigate the scalar field dynamics of models with nonminimally coupled scalar fields in the presence of the Gauss-Bonnet term and derive the structure of the effective potential and conditions for stable de Sitter solutions in general. Specializing to specific couplings, we explore the possibility of realizing th... |
2009.12897 | Vasilis Oikonomou | V.K. Oikonomou, F.P. Fronimos, N. Th. Chatzarakis | $f(R)$ Gravity Phase Space in the Presence of Thermal Effects | Abstract reduced due to arXiv limitations | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we shall consider $f(R)$ gravity and its cosmological
implications, when an extra matter term generated by thermal effects is added
by hand in the Lagrangian. We formulate the equations of motion of the theory
as a dynamical system, that can be treated as an autonomous one only for
specific solutions f... | [
{
"created": "Sun, 27 Sep 2020 16:59:43 GMT",
"version": "v1"
}
] | 2020-09-29 | [
[
"Oikonomou",
"V. K.",
""
],
[
"Fronimos",
"F. P.",
""
],
[
"Chatzarakis",
"N. Th.",
""
]
] | In this paper, we shall consider $f(R)$ gravity and its cosmological implications, when an extra matter term generated by thermal effects is added by hand in the Lagrangian. We formulate the equations of motion of the theory as a dynamical system, that can be treated as an autonomous one only for specific solutions for... |
1604.08002 | Diego S\'aez-G\'omez | Diego Saez-Gomez (IA, U. of Lisbon) | Testing the concordance model in cosmology with model-independent
methods: some issues | 6 pages, 2 figures; Contribution to the proceedings of "The
Fourteenth Marcel Grossmann Meeting", University of Rome "La Sapienza", Rome,
July 12-18, 2015 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the number of dark energy models have rapidly increased over the last
years, some model-independent methods have been developed in order to analyse
the cosmological evolution in a phenomenological way. In this manuscript, we
analyse some of these approaches and their shortcomings to provide reliable
information... | [
{
"created": "Wed, 27 Apr 2016 10:00:43 GMT",
"version": "v1"
}
] | 2016-04-28 | [
[
"Saez-Gomez",
"Diego",
"",
"IA, U. of Lisbon"
]
] | Since the number of dark energy models have rapidly increased over the last years, some model-independent methods have been developed in order to analyse the cosmological evolution in a phenomenological way. In this manuscript, we analyse some of these approaches and their shortcomings to provide reliable information. |
1902.00701 | Vahid Kamali | Vahid Kamali | Reheating After Swampland Conjecture | The abstract was changed, Motivation was added, Typos were corrected,
5 pages, 4 figures. In press Journal of High Energy Physics | null | 10.1007/JHEP01(2020)092 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of the universe started from a hot and dense Big Bang point.
Temperature fluctuation map of cosmic microwave background (CMB) radiation and
initial seeds of large scale structures (LSS) are explained by an inflationary
period in a very early time. Inflaton as quanta of inflation field is
responsible for... | [
{
"created": "Sat, 2 Feb 2019 11:47:30 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Dec 2019 19:16:41 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"Kamali",
"Vahid",
""
]
] | The evolution of the universe started from a hot and dense Big Bang point. Temperature fluctuation map of cosmic microwave background (CMB) radiation and initial seeds of large scale structures (LSS) are explained by an inflationary period in a very early time. Inflaton as quanta of inflation field is responsible for t... |
2402.15575 | Yerko V\'asquez | Sebasti\'an Alfaro, P. A. Gonz\'alez, Diego Olmos, Eleftherios
Papantonopoulos and Yerko V\'asquez | Quasinormal modes and bound states of massive scalar fields in wormhole
spacetimes | Version accepted for publication in PRD. arXiv admin note: text
overlap with arXiv:2205.06079 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore the propagation of massive scalar fields on some
wormhole backgrounds. On one side, we consider the Bronnikov-Ellis wormhole
solution and wormhole geometries with a non-constant redshift function by
introducing a gravitational mass $M$, which goes over into the Bronnikov-Ellis
wormhole when th... | [
{
"created": "Fri, 23 Feb 2024 19:24:01 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Mar 2024 02:03:13 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Apr 2024 02:17:32 GMT",
"version": "v3"
}
] | 2024-04-11 | [
[
"Alfaro",
"Sebastián",
""
],
[
"González",
"P. A.",
""
],
[
"Olmos",
"Diego",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Vásquez",
"Yerko",
""
]
] | In this work we explore the propagation of massive scalar fields on some wormhole backgrounds. On one side, we consider the Bronnikov-Ellis wormhole solution and wormhole geometries with a non-constant redshift function by introducing a gravitational mass $M$, which goes over into the Bronnikov-Ellis wormhole when the ... |
gr-qc/0504020 | Liang Gang Liu | De-hua Wen, Wei Chen, Jian-xun Hu, Liang-gang Liu | Frame Dragging Effect on Moment of Inertia and Radius of Gyration of
Neutron Star | 6 pages, 5 figures | Mod.Phys.Lett.A22:631-636,2007 | 10.1142/S0217732307023225 | null | gr-qc | null | Accurate to the first order in the uniform angular velocity, the general
relativity frame dragging effect of the moments of inertia and radii of
gyration of two kinds of neutron stars are calculated in a relativistic
$\sigma-\omega$ model. The calculation shows that the dragging effect will
diminish the moments of in... | [
{
"created": "Wed, 6 Apr 2005 02:11:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wen",
"De-hua",
""
],
[
"Chen",
"Wei",
""
],
[
"Hu",
"Jian-xun",
""
],
[
"Liu",
"Liang-gang",
""
]
] | Accurate to the first order in the uniform angular velocity, the general relativity frame dragging effect of the moments of inertia and radii of gyration of two kinds of neutron stars are calculated in a relativistic $\sigma-\omega$ model. The calculation shows that the dragging effect will diminish the moments of iner... |
gr-qc/0410136 | Muhammad Sharif | M. Sharif | Addendum: Symmetries of the energy-momentum tensor | 7 pages, no figure, LaTex | J.Math.and Phys. 45 (2004) 4193 | 10.1063/1.1777404 | null | gr-qc | null | In recent papers [1-3], we have discussed matter symmetries of non-static
spherically symmetric spacetimes, static plane symmetric spacetimes and
cylindrically symmetric static spacetimes. These have been classified for both
cases when the energy-momentum tensor is non-degenerate and also when it is
degenerate. Here ... | [
{
"created": "Thu, 28 Oct 2004 04:25:02 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sharif",
"M.",
""
]
] | In recent papers [1-3], we have discussed matter symmetries of non-static spherically symmetric spacetimes, static plane symmetric spacetimes and cylindrically symmetric static spacetimes. These have been classified for both cases when the energy-momentum tensor is non-degenerate and also when it is degenerate. Here we... |
1004.0508 | Mohammad Malekjani | M. Malekjani and A. Khodam-Mohammadi | Agegraphic Dark Energy Model in Non-Flat Universe: Statefinder
Diagnostic and $w-w^{\prime}$ Analysis | 20 pages, 4 figures, 2 tables, International Journal of Modern
Physics D accepted | Int. J. Mod. Phys. D19:1857-1871,2010 | 10.1142/S0218271810018086 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the interacting agegraphic dark energy (ADE) model in non-flat
universe by means of statefinder diagnostic and $w-w^{\prime}$ analysis. First,
the evolution of EoS parameter ($w_d$) and deceleration parameter ($q$) in
terms of scale factor for interacting ADE model in non-flat universe are
calculated. Depend... | [
{
"created": "Sun, 4 Apr 2010 13:34:20 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Jun 2010 13:54:25 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Malekjani",
"M.",
""
],
[
"Khodam-Mohammadi",
"A.",
""
]
] | We study the interacting agegraphic dark energy (ADE) model in non-flat universe by means of statefinder diagnostic and $w-w^{\prime}$ analysis. First, the evolution of EoS parameter ($w_d$) and deceleration parameter ($q$) in terms of scale factor for interacting ADE model in non-flat universe are calculated. Dependen... |
gr-qc/0512149 | Carsten Gundlach | Gioel Calabrese, Carsten Gundlach and David Hilditch | Asymptotically null slices in numerical relativity: mathematical
analysis and spherical wave equation tests | Numerical tests improved, conclusions extended | Class.Quant.Grav. 23 (2006) 4829-4846 | 10.1088/0264-9381/23/15/004 | null | gr-qc | null | We investigate the use of asymptotically null slices combined with stretching
or compactification of the radial coordinate for the numerical simulation of
asymptotically flat spacetimes. We consider a 1-parameter family of coordinates
characterised by the asymptotic relation $r\sim R^{1-n}$ between the physical
radiu... | [
{
"created": "Sat, 24 Dec 2005 16:29:15 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jun 2006 18:47:25 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Calabrese",
"Gioel",
""
],
[
"Gundlach",
"Carsten",
""
],
[
"Hilditch",
"David",
""
]
] | We investigate the use of asymptotically null slices combined with stretching or compactification of the radial coordinate for the numerical simulation of asymptotically flat spacetimes. We consider a 1-parameter family of coordinates characterised by the asymptotic relation $r\sim R^{1-n}$ between the physical radius ... |
2405.08846 | Hristu Culetu | Hristu Culetu | Semiclassical corrections to a regularized Schwarzschild metric | Acta Phys.Pol.B 10, 431 (2017) | null | 10.5506/APhysPolBSupp.10.431 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A regular form of the Schwarzschild geometry is proposed. It is more suitable
for application in microphysics because the source mass comes out both as a
Schwarzschild radius and the Compton wavelength of the mass $m$. The Komar
energy equals $mc^{2}$ in the classical situation ($\hbar = 0$).
| [
{
"created": "Tue, 14 May 2024 11:23:24 GMT",
"version": "v1"
}
] | 2024-05-16 | [
[
"Culetu",
"Hristu",
""
]
] | A regular form of the Schwarzschild geometry is proposed. It is more suitable for application in microphysics because the source mass comes out both as a Schwarzschild radius and the Compton wavelength of the mass $m$. The Komar energy equals $mc^{2}$ in the classical situation ($\hbar = 0$). |
gr-qc/0609113 | Peter Beyersdorf | Peter T. Beyersdorf | Input spectrum for heterodyne detection in advanced gravitational wave
detectors without non-stationary shot-noise | 10 pages with 6 figures | null | null | null | gr-qc | null | Future interferometric gravitational wave detectors will make use of the
coupling between shot noise and radiation pressure noise that produces a
squeezed output for the quantum noise at the dark-port of the interferometer
allowing these interferometers to operate with a sensitivity that exceeds the
standard quantum ... | [
{
"created": "Mon, 25 Sep 2006 18:27:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Beyersdorf",
"Peter T.",
""
]
] | Future interferometric gravitational wave detectors will make use of the coupling between shot noise and radiation pressure noise that produces a squeezed output for the quantum noise at the dark-port of the interferometer allowing these interferometers to operate with a sensitivity that exceeds the standard quantum li... |
gr-qc/0511164 | Ashutosh Mahajan | Ashutosh Mahajan and Pankaj S. Joshi | Rebounce and Black hole formation in a Gravitational Collapse Model with
Vanishing Radial Pressure | 15 pages, To be published in Gen.Rel.Grav | Gen.Rel.Grav.39:825-838,2007 | 10.1007/s10714-007-0424-4 | null | gr-qc | null | We examine spherical gravitational collapse of a matter model with vanishing
radial pressure and non-zero tangential pressure. It is seen analytically that
the collapsing cloud either forms a black hole or disperses depending on values
of the initial parameters which are initial density, tangential pressure and
veloc... | [
{
"created": "Wed, 30 Nov 2005 14:50:55 GMT",
"version": "v1"
},
{
"created": "Sat, 12 May 2007 15:08:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mahajan",
"Ashutosh",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | We examine spherical gravitational collapse of a matter model with vanishing radial pressure and non-zero tangential pressure. It is seen analytically that the collapsing cloud either forms a black hole or disperses depending on values of the initial parameters which are initial density, tangential pressure and velocit... |
2206.03980 | Riccardo Della Monica | Riccardo Della Monica, Ivan de Martino | Narrowing the allowed mass range of ultralight bosons with the S2 star | 5 pages, 2 figures, 1 table, 5 appendices. Accepted for publication
in A&A Letters. Publication title changed with respect to previous versions
during the editorial process | A&A 670, L4 (2023) | 10.1051/0004-6361/202245150 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that N-body simulations of ultralight bosons show the
formation of a solitonic dark matter core in the innermost part of the halo.
The scale length of such a soliton depends on the inverse of the mass of the
boson. On the other hand, the orbital motion of stars in the Galactic Center
depends on the d... | [
{
"created": "Wed, 8 Jun 2022 15:57:48 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Dec 2022 15:36:29 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Jan 2023 09:21:54 GMT",
"version": "v3"
}
] | 2023-02-01 | [
[
"Della Monica",
"Riccardo",
""
],
[
"de Martino",
"Ivan",
""
]
] | It is well known that N-body simulations of ultralight bosons show the formation of a solitonic dark matter core in the innermost part of the halo. The scale length of such a soliton depends on the inverse of the mass of the boson. On the other hand, the orbital motion of stars in the Galactic Center depends on the dis... |
2208.08461 | Bob Holdom | Bob Holdom | Towards rotating 2-2-holes | 14 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Static 2-2-hole solutions of quadratic gravity have been investigated to be a
possible horizonless replacement for black holes as the endpoint of
gravitational collapse. Realistically such objects will form with spin, but
rotating 2-2-hole solutions are currently not known. We take some steps here to
explore the exis... | [
{
"created": "Wed, 17 Aug 2022 18:03:22 GMT",
"version": "v1"
}
] | 2022-08-19 | [
[
"Holdom",
"Bob",
""
]
] | Static 2-2-hole solutions of quadratic gravity have been investigated to be a possible horizonless replacement for black holes as the endpoint of gravitational collapse. Realistically such objects will form with spin, but rotating 2-2-hole solutions are currently not known. We take some steps here to explore the existe... |
2405.13373 | Andrei V. Frolov | Jonathan Barenboim, Andrei V. Frolov, Gabor Kunstatter | No Drama in 2D Black Hole Evaporation | 4 pages, 5 figures, REVTex 4.2 | null | null | SCG-2024-01 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically calculate the spacetime describing the formation and
evaporation of a regular black hole in 2D dilaton gravity. The apparent
horizons evaporate smoothly in finite time to form a compact trapped region. We
nevertheless see rich dynamics; an anti-trapped region forms alongside the
black hole, and additio... | [
{
"created": "Wed, 22 May 2024 06:16:16 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2024 20:18:02 GMT",
"version": "v2"
}
] | 2024-07-29 | [
[
"Barenboim",
"Jonathan",
""
],
[
"Frolov",
"Andrei V.",
""
],
[
"Kunstatter",
"Gabor",
""
]
] | We numerically calculate the spacetime describing the formation and evaporation of a regular black hole in 2D dilaton gravity. The apparent horizons evaporate smoothly in finite time to form a compact trapped region. We nevertheless see rich dynamics; an anti-trapped region forms alongside the black hole, and additiona... |
gr-qc/0606019 | Yuri Laptev | Yu.P. Laptev, M.L. Fil'chenkov | Electromagnetic and Gravitational Radiation of Graviatoms | 7 pages, 1 figure, 3 tables; accepted in "Astronomical and
Astrophysical Transactions" | null | 10.1080/10556790600804424 | null | gr-qc | null | Graviatom existence conditions have been found. The graviatoms (quantum
systems around mini-black-holes) satisfying these conditions contain the
following charged particles: the electron, muon, tau lepton, wino, pion and
kaon. Electric dipole and quadrupole and gravitational radiations are
calculated for the graviato... | [
{
"created": "Sat, 3 Jun 2006 15:14:07 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Laptev",
"Yu. P.",
""
],
[
"Fil'chenkov",
"M. L.",
""
]
] | Graviatom existence conditions have been found. The graviatoms (quantum systems around mini-black-holes) satisfying these conditions contain the following charged particles: the electron, muon, tau lepton, wino, pion and kaon. Electric dipole and quadrupole and gravitational radiations are calculated for the graviatoms... |
2209.08589 | Konstantin Osetrin | Konstantin Osetrin and Evgeny Osetrin and Elena Osetrina | Deviation of geodesics and particle trajectories in a gravitational wave
of the Bianchi type VI universe | 26 pages | Journal of Physics A: Mathematical and Theoretical, 2023, 56(32),
325205 | 10.1088/1751-8121/ace6e3 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/4.0/ | For the Bianchi type VI universe, exact solutions of the equation of geodesic
deviation in a strong primordial gravitational wave in a privileged coordinate
system are obtained. The solutions refer to Shapovalov's gravitational-wave
models of spacetime and allow the existence of complete integrals of the
Hamilton-Jac... | [
{
"created": "Sun, 18 Sep 2022 15:59:35 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Osetrin",
"Konstantin",
""
],
[
"Osetrin",
"Evgeny",
""
],
[
"Osetrina",
"Elena",
""
]
] | For the Bianchi type VI universe, exact solutions of the equation of geodesic deviation in a strong primordial gravitational wave in a privileged coordinate system are obtained. The solutions refer to Shapovalov's gravitational-wave models of spacetime and allow the existence of complete integrals of the Hamilton-Jacob... |
gr-qc/0101116 | D. H. Santamore | D. H. Santamore and Yuri Levin | Eliminating Thermal Violin Spikes from LIGO Noise | 15 pages, 3 figures | Phys.Rev.D64:042002,2001 | 10.1103/PhysRevD.64.042002 | null | gr-qc cond-mat.stat-mech | null | We have developed a scheme for reducing LIGO suspension thermal noise close
to violin-mode resonances. The idea is to monitor directly the
thermally-induced motion of a small portion of (a ``point'' on) each suspension
fiber, thereby recording the random forces driving the test-mass motion close
to each violin-mode f... | [
{
"created": "Tue, 30 Jan 2001 11:12:49 GMT",
"version": "v1"
}
] | 2009-12-31 | [
[
"Santamore",
"D. H.",
""
],
[
"Levin",
"Yuri",
""
]
] | We have developed a scheme for reducing LIGO suspension thermal noise close to violin-mode resonances. The idea is to monitor directly the thermally-induced motion of a small portion of (a ``point'' on) each suspension fiber, thereby recording the random forces driving the test-mass motion close to each violin-mode fre... |
1711.02583 | Griselda Figueroa Aguirre | Ernesto F. Eiroa, Griselda Figueroa-Aguirre | Spherical thin shells in F(R) gravity: construction and stability | 13 pages, 2 figures; v2: improved version, new references added | Eur. Phys. J. C (2018) 78:54 | 10.1140/epjc/s10052-018-5518-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a broad class of spherical thin shells of matter in F(R) gravity.
We show that the corresponding junction conditions determine the equation of
state between the energy density and the pressure/tension at the surface. We
analyze the stability of the static configurations under perturbations
preserving the s... | [
{
"created": "Tue, 7 Nov 2017 16:16:08 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2018 14:23:19 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Figueroa-Aguirre",
"Griselda",
""
]
] | We present a broad class of spherical thin shells of matter in F(R) gravity. We show that the corresponding junction conditions determine the equation of state between the energy density and the pressure/tension at the surface. We analyze the stability of the static configurations under perturbations preserving the sym... |
gr-qc/0311037 | Hirotaka Takahashi | Hirotaka Takahashi, Hideyuki Tagoshi, the TAMA Collaboration | Toward the search for gravitational waves from inspiralling compact
binaries in TAMA300 data during 2003: data quality and stability | 6 pages, 4 figures,accepted for publication in Class. Quant. Grav. as
Special issue article (Proceedings of the 5th Edoardo Amaldi Conference on
Gravitational Waves, Tirrenia, Pisa, Italy, 6-11 July 2003) | Class.Quant.Grav. 21 (2004) S697-S702 | 10.1088/0264-9381/21/5/046 | null | gr-qc | null | We present the preliminary results of the analysis to search for inspiraling
compact binaries using TAMA300 DT8 data which was taken during 2003. We compare
the quality and the stability of the data with that taken during DT6 in 2001.
We find that the DT8 data has better quality and stability than the DT6 data.
| [
{
"created": "Wed, 12 Nov 2003 03:30:47 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Takahashi",
"Hirotaka",
""
],
[
"Tagoshi",
"Hideyuki",
""
],
[
"Collaboration",
"the TAMA",
""
]
] | We present the preliminary results of the analysis to search for inspiraling compact binaries using TAMA300 DT8 data which was taken during 2003. We compare the quality and the stability of the data with that taken during DT6 in 2001. We find that the DT8 data has better quality and stability than the DT6 data. |
1707.05017 | Michele Arzano | Giovanni Amelino-Camelia, Michele Arzano, Mal\'u Maira Da Silva and
Daniel H. Orozco-Borunda | Relativistic Planck-scale polymer | 5 pages, no figures. v2: minor changes in Section II | null | 10.1016/j.physletb.2017.10.071 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Polymer quantum mechanics has been studied as a simplified picture that
reflects some of the key properties of Loop Quantum Gravity; however, while the
fate of relativistic symmetries in Loop Quantum Gravity is still not
established, it is usually assumed that the discrete polymer structure should
lead to a breakdown... | [
{
"created": "Mon, 17 Jul 2017 06:59:23 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Sep 2017 14:20:59 GMT",
"version": "v2"
}
] | 2017-12-06 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Arzano",
"Michele",
""
],
[
"Da Silva",
"Malú Maira",
""
],
[
"Orozco-Borunda",
"Daniel H.",
""
]
] | Polymer quantum mechanics has been studied as a simplified picture that reflects some of the key properties of Loop Quantum Gravity; however, while the fate of relativistic symmetries in Loop Quantum Gravity is still not established, it is usually assumed that the discrete polymer structure should lead to a breakdown o... |
2308.03603 | Dipanjan Dey | Dipanjan Dey, Koushiki, Pankaj S. Joshi | Equilibrium states from gravitational collapse of minimally coupled
scalar field with non-zero potential | 8 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the model of spherically symmetric and spatially homogeneous
gravitational collapse of a minimally coupled scalar field. Our study focuses
on obtaining the scalar field potential that leads to a final equilibrium state
in the gravitational collapse. We demonstrate the existence of a class of
scalar field sol... | [
{
"created": "Mon, 7 Aug 2023 14:06:57 GMT",
"version": "v1"
}
] | 2023-08-08 | [
[
"Dey",
"Dipanjan",
""
],
[
"Koushiki",
"",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | We study the model of spherically symmetric and spatially homogeneous gravitational collapse of a minimally coupled scalar field. Our study focuses on obtaining the scalar field potential that leads to a final equilibrium state in the gravitational collapse. We demonstrate the existence of a class of scalar field solut... |
0804.3787 | Francois Foucart | Francois Foucart, Lawrence E. Kidder, Harald P. Pfeiffer, Saul A.
Teukolsky | Initial data for black hole-neutron star binaries: a flexible,
high-accuracy spectral method | 19 pages, 11 figures, Modified to match final PRD version | Phys.Rev.D77:124051,2008 | 10.1103/PhysRevD.77.124051 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new numerical scheme to solve the initial value problem for
black hole-neutron star binaries. This method takes advantage of the
flexibility and fast convergence of a multidomain spectral representation of
the initial data to construct high-accuracy solutions at a relatively low
computational cost. We pr... | [
{
"created": "Wed, 23 Apr 2008 19:11:20 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Apr 2008 14:56:58 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Jun 2008 15:48:06 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Foucart",
"Francois",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a new numerical scheme to solve the initial value problem for black hole-neutron star binaries. This method takes advantage of the flexibility and fast convergence of a multidomain spectral representation of the initial data to construct high-accuracy solutions at a relatively low computational cost. We prov... |
gr-qc/9707040 | Carlos Augusto Romero | A.Barros and C.Romero | Global Monopoles in Brans-Dicke Theory of Gravity | 10 pages, LaTeX; replaced with revised version Wed, 24 Sep 1997 | Phys.Rev.D56:6688-6691,1997 | 10.1103/PhysRevD.56.6688 | null | gr-qc | null | The gravitational field of a global monopole in the context of Brans-Dicke
theory of gravity is investigated. The space-time and the scalar field
generated by the monopole are obtained by solving the field equations in the
weak field approximation. A comparison is made with the corresponding results
predicted by Gene... | [
{
"created": "Tue, 16 Jul 1996 18:50:24 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 1997 18:20:46 GMT",
"version": "v2"
}
] | 2011-09-09 | [
[
"Barros",
"A.",
""
],
[
"Romero",
"C.",
""
]
] | The gravitational field of a global monopole in the context of Brans-Dicke theory of gravity is investigated. The space-time and the scalar field generated by the monopole are obtained by solving the field equations in the weak field approximation. A comparison is made with the corresponding results predicted by Genera... |
2009.09901 | David Kofro\v{n} | David Kofro\v{n} | On the nature of cosmic strings in black hole spacetimes | arXiv admin note: substantial text overlap with arXiv:1705.01138 | Gen Relativ Gravit 52, 91 (2020) | 10.1007/s10714-020-02741-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new model for cosmic strings (i.e. conical singularities) attached to black
holes is proposed. These string are obtained by a explicit construction via
limiting process from the so-called Bonnor rocket. This reveals quite
surprising nature of their stress-energy tensor which contains first derivative
of Dirac $\del... | [
{
"created": "Mon, 14 Sep 2020 13:28:46 GMT",
"version": "v1"
}
] | 2020-09-22 | [
[
"Kofroň",
"David",
""
]
] | A new model for cosmic strings (i.e. conical singularities) attached to black holes is proposed. These string are obtained by a explicit construction via limiting process from the so-called Bonnor rocket. This reveals quite surprising nature of their stress-energy tensor which contains first derivative of Dirac $\delta... |
gr-qc/0111093 | Florian Siebel | Florian Siebel, Jose A. Font, Ewald Mueller, Philippos Papadopoulos | Simulating the dynamics of relativistic stars via a light-cone approach | 15 pages, 10 figures, submitted to Phys. Rev. D | Phys.Rev. D65 (2002) 064038 | 10.1103/PhysRevD.65.064038 | null | gr-qc astro-ph | null | We present new numerical algorithms for the coupled Einstein-perfect fluid
system in axisymmetry. Our framework uses a foliation based on a family of
light cones, emanating from a regular center, and terminating at future null
infinity. This coordinate system is well adapted to the study of the dynamical
spacetimes a... | [
{
"created": "Tue, 27 Nov 2001 11:10:30 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Siebel",
"Florian",
""
],
[
"Font",
"Jose A.",
""
],
[
"Mueller",
"Ewald",
""
],
[
"Papadopoulos",
"Philippos",
""
]
] | We present new numerical algorithms for the coupled Einstein-perfect fluid system in axisymmetry. Our framework uses a foliation based on a family of light cones, emanating from a regular center, and terminating at future null infinity. This coordinate system is well adapted to the study of the dynamical spacetimes ass... |
gr-qc/0304030 | Nils Andersson | K. Glampedakis and N. Andersson | Quick and dirty methods for studying black-hole resonances | 18 pages, RevTeX, 7 ps figs | Class.Quant.Grav. 20 (2003) 3441-3464 | 10.1088/0264-9381/20/15/312 | null | gr-qc | null | We discuss simple integration methods for the calculation of rotating black
hole scattering resonances both in the complex frequency plane (quasinormal
modes) and the complex angular momentum plane (Regge poles). Our numerical
schemes are based on variations of "phase-amplitude" methods. In particular, we
discuss the... | [
{
"created": "Mon, 7 Apr 2003 09:49:09 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Glampedakis",
"K.",
""
],
[
"Andersson",
"N.",
""
]
] | We discuss simple integration methods for the calculation of rotating black hole scattering resonances both in the complex frequency plane (quasinormal modes) and the complex angular momentum plane (Regge poles). Our numerical schemes are based on variations of "phase-amplitude" methods. In particular, we discuss the P... |
2408.03967 | Sanjay Mandal | Sneha Pradhan, Piyali Bhar, Sanjay Mandal, P.K. Sahoo, Kazuharu Bamba | The Stability of Anisotropic Compact Stars Influenced by Dark Matter
under Teleparallel Gravity: An Extended Gravitational Deformation Approach | 22 pages, 10 figures. Comments are welcome | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In our investigation, we pioneer the development of geometrically deformed
strange stars within the framework of $f(\mathcal{T})$ gravity theory through
gravitational decoupling via the complete geometric deformation (CGD)
technique. The significant finding is the precise solution for deformed strange
star (SS) model... | [
{
"created": "Tue, 6 Aug 2024 14:04:05 GMT",
"version": "v1"
}
] | 2024-08-09 | [
[
"Pradhan",
"Sneha",
""
],
[
"Bhar",
"Piyali",
""
],
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | In our investigation, we pioneer the development of geometrically deformed strange stars within the framework of $f(\mathcal{T})$ gravity theory through gravitational decoupling via the complete geometric deformation (CGD) technique. The significant finding is the precise solution for deformed strange star (SS) models ... |
1011.3641 | Kirill Krasnov | Alexander Torres-Gomez, Kirill Krasnov and Carlos Scarinci | A Unified Theory of Non-Linear Electrodynamics and Gravity | 31 page, no figures | Phys.Rev.D83:025023,2011 | 10.1103/PhysRevD.83.025023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a class of unified theories of electromagnetism and gravity. The
Lagrangian is of the BF type, with a potential for the B-field, the gauge group
is U(2) (complexified). Given a choice of the potential function the theory is
a deformation of (complex) general relativity and electromagnetism, and
describes ... | [
{
"created": "Tue, 16 Nov 2010 10:36:58 GMT",
"version": "v1"
}
] | 2011-02-28 | [
[
"Torres-Gomez",
"Alexander",
""
],
[
"Krasnov",
"Kirill",
""
],
[
"Scarinci",
"Carlos",
""
]
] | We describe a class of unified theories of electromagnetism and gravity. The Lagrangian is of the BF type, with a potential for the B-field, the gauge group is U(2) (complexified). Given a choice of the potential function the theory is a deformation of (complex) general relativity and electromagnetism, and describes ju... |
2208.10969 | Richard Petti | Richard James Petti | Conformal Structure of Quantum Wave Mechanics | 17 pages, 2 figures, 30 lines of computer algebra code, 2 Appendices | International Journal of Geometric Methods in Modern Physics
2250174, August 15, 2022 | 10.1142/S0219887822501742 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work interprets the quantum terms in a Lagrangian, and consequently of
the wave equation and momentum tensor, in terms of a modified spacetime metric.
Part I interprets the quantum terms in the Lagrangian of a Klein Gordon field
as scalar curvature of conformal dilation covector nm that is proportional to
hbar t... | [
{
"created": "Sun, 21 Aug 2022 18:24:48 GMT",
"version": "v1"
}
] | 2022-08-24 | [
[
"Petti",
"Richard James",
""
]
] | This work interprets the quantum terms in a Lagrangian, and consequently of the wave equation and momentum tensor, in terms of a modified spacetime metric. Part I interprets the quantum terms in the Lagrangian of a Klein Gordon field as scalar curvature of conformal dilation covector nm that is proportional to hbar tim... |
0806.4765 | Scott Pollack | Scott E Pollack and Stephan Schlamminger and Jens Gundlach | Temporal Extent of Surface Potentials between Closely Spaced Metals | null | Phys.Rev.Lett.101:071101,2008 | 10.1103/PhysRevLett.101.071101 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Variations in the electrostatic surface potential between the proof mass and
electrode housing in the space-based gravitational wave mission LISA is one of
the largest contributors of noise at frequencies below a few mHz. Torsion
balances provide an ideal testbed for investigating these effects in conditions
emulativ... | [
{
"created": "Sun, 29 Jun 2008 15:28:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pollack",
"Scott E",
""
],
[
"Schlamminger",
"Stephan",
""
],
[
"Gundlach",
"Jens",
""
]
] | Variations in the electrostatic surface potential between the proof mass and electrode housing in the space-based gravitational wave mission LISA is one of the largest contributors of noise at frequencies below a few mHz. Torsion balances provide an ideal testbed for investigating these effects in conditions emulative ... |
0806.3132 | Molin Liu | Molin Liu, Hongya Liu, Jingfei Zhang, Fei Yu | Real Scalar Field Scattering with Polynomial Approximation around
Schwarzschild-de Sitter Black-hole | revtex4 source file, 11 pages, 8 figures | Chin.Phys.B17:1633-1639, 2008 | 10.1088/1674-1056/17/5/018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As one of the fitting methods, the polynomial approximation is effective to
process sophisticated problem. In this paper, we employ this approach to handle
the scattering of scalar field around the Schwarzschild-de Sitter black-hole.
The complex relationship between tortoise coordinate and radial coordinate is
replac... | [
{
"created": "Thu, 19 Jun 2008 05:43:15 GMT",
"version": "v1"
}
] | 2009-09-01 | [
[
"Liu",
"Molin",
""
],
[
"Liu",
"Hongya",
""
],
[
"Zhang",
"Jingfei",
""
],
[
"Yu",
"Fei",
""
]
] | As one of the fitting methods, the polynomial approximation is effective to process sophisticated problem. In this paper, we employ this approach to handle the scattering of scalar field around the Schwarzschild-de Sitter black-hole. The complex relationship between tortoise coordinate and radial coordinate is replaced... |
2408.05484 | Saddam Hussain | Saddam Hussain, Simran Arora, Yamuna Rana, Benjamin Rose, and Anzhong
Wang | Interacting Models of Dark Energy and Dark Matter in Einstein scalar
Gauss Bonnet Gravity | 31 pages, 21 figures, and 3 tables | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | We study the dynamics of the interacting models between the Gauss-Bonnet (GB)
coupled scalar field and the dark matter fluid in a homogeneous and isotropic
background. A key feature of GB coupling models is the varying speed of
gravitational waves (GWs). We utilize recent constraints on the GW speed and
conduct our a... | [
{
"created": "Sat, 10 Aug 2024 08:25:52 GMT",
"version": "v1"
}
] | 2024-08-13 | [
[
"Hussain",
"Saddam",
""
],
[
"Arora",
"Simran",
""
],
[
"Rana",
"Yamuna",
""
],
[
"Rose",
"Benjamin",
""
],
[
"Wang",
"Anzhong",
""
]
] | We study the dynamics of the interacting models between the Gauss-Bonnet (GB) coupled scalar field and the dark matter fluid in a homogeneous and isotropic background. A key feature of GB coupling models is the varying speed of gravitational waves (GWs). We utilize recent constraints on the GW speed and conduct our ana... |
1704.02120 | Jose Geraldo Pereira | A. Araujo, D. F. Lopez, J. G. Pereira | de Sitter-invariant special relativity and the dark energy problem | 14 pages. Accepted for publication in Class. Quantum Grav. V2: a few
corrections and small presentation changes | Class. Quantum Grav. 34 (2017) 115014 | 10.1088/1361-6382/aa6bbb | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The replacement of the Poincar\'e-invariant Einstein special relativity by a
de Sitter-invariant special relativity produces concomitant changes in all
relativistic theories, including general relativity. A crucial change in the
latter is that both the background de Sitter curvature and the gravitational
dynamical cu... | [
{
"created": "Fri, 7 Apr 2017 08:04:45 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2017 16:42:05 GMT",
"version": "v2"
}
] | 2017-05-23 | [
[
"Araujo",
"A.",
""
],
[
"Lopez",
"D. F.",
""
],
[
"Pereira",
"J. G.",
""
]
] | The replacement of the Poincar\'e-invariant Einstein special relativity by a de Sitter-invariant special relativity produces concomitant changes in all relativistic theories, including general relativity. A crucial change in the latter is that both the background de Sitter curvature and the gravitational dynamical curv... |
1307.4828 | James M. Overduin | Paul S. Wesson and James M. Overduin | The Scalar Field Source in Kaluza-Klein Theory | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To better understand the scalar field typical of higher-dimensional
extensions of general relativity, we analyse three classes of solutions. In
all, the field equation for the extra dimension resembles the Klein-Gordon
equation, and we evaluate the strength of the source. Our results show that the
scalar field is cou... | [
{
"created": "Thu, 18 Jul 2013 04:19:55 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2013 03:22:49 GMT",
"version": "v2"
}
] | 2013-10-25 | [
[
"Wesson",
"Paul S.",
""
],
[
"Overduin",
"James M.",
""
]
] | To better understand the scalar field typical of higher-dimensional extensions of general relativity, we analyse three classes of solutions. In all, the field equation for the extra dimension resembles the Klein-Gordon equation, and we evaluate the strength of the source. Our results show that the scalar field is coupl... |
gr-qc/9606049 | Alan Rendall | Alan D. Rendall | Constant mean curvature foliations in cosmological spacetimes | 11 pages. Contribution to the Journees Relativistes | Helv.Phys.Acta 69:490-500,1996 | null | null | gr-qc | null | Foliations by constant mean curvature hypersurfaces provide a possibility of
defining a preferred time coordinate in general relativity. In the following
various conjectures are made about the existence of foliations of this kind in
spacetimes satisfying the strong energy condition and possessing compact Cauchy
hyper... | [
{
"created": "Mon, 17 Jun 1996 12:27:40 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Rendall",
"Alan D.",
""
]
] | Foliations by constant mean curvature hypersurfaces provide a possibility of defining a preferred time coordinate in general relativity. In the following various conjectures are made about the existence of foliations of this kind in spacetimes satisfying the strong energy condition and possessing compact Cauchy hypersu... |
2106.09520 | Manuel D. Malaver | M.Malaver, H.D.Kasmaei, R.Iyer, S.Sadhukhan, A.Kar | A theoretical model of Dark Energy Stars in Einstein-Gauss-Bonnet
Gravity | 26 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Dark energy stars research is an issue of great interest since recent
astronomical observations with respect to measurements in distant supernovas,
cosmic microwave background and weak gravitational lensing confirm that the
universe is undergoing a phase of accelerated expansion and this cosmological
behavior is caus... | [
{
"created": "Wed, 16 Jun 2021 12:46:16 GMT",
"version": "v1"
}
] | 2021-06-18 | [
[
"Malaver",
"M.",
""
],
[
"Kasmaei",
"H. D.",
""
],
[
"Iyer",
"R.",
""
],
[
"Sadhukhan",
"S.",
""
],
[
"Kar",
"A.",
""
]
] | Dark energy stars research is an issue of great interest since recent astronomical observations with respect to measurements in distant supernovas, cosmic microwave background and weak gravitational lensing confirm that the universe is undergoing a phase of accelerated expansion and this cosmological behavior is caused... |
1603.04576 | Sergio Cacciatori | F. Belgiorno and S. L. Cacciatori | Stimulated emission and Hawking radiation in black hole analogues | 14 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stimulated emission by black holes is discussed in light of the analogue
gravity program. We first consider initial quantum states containing a definite
number of particles, and then we take into account the case where the initial
state is a coherent state. The latter case is particularly significant in the
case wher... | [
{
"created": "Tue, 15 Mar 2016 07:21:28 GMT",
"version": "v1"
}
] | 2016-03-16 | [
[
"Belgiorno",
"F.",
""
],
[
"Cacciatori",
"S. L.",
""
]
] | Stimulated emission by black holes is discussed in light of the analogue gravity program. We first consider initial quantum states containing a definite number of particles, and then we take into account the case where the initial state is a coherent state. The latter case is particularly significant in the case where ... |
2212.06340 | Wolfgang Tichy | Wolfgang Tichy, Liwei Ji, Ananya Adhikari, Alireza Rashti, Michal
Pirog | The new discontinuous Galerkin methods based numerical relativity
program Nmesh | 44 pages, 17 figures | null | 10.1088/1361-6382/acaae7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Interpreting gravitational wave observations and understanding the physics of
astrophysical compact objects such as black holes or neutron stars requires
accurate theoretical models. Here, we present a new numerical relativity
computer program, called Nmesh, that has the design goal to become a next
generation progra... | [
{
"created": "Tue, 13 Dec 2022 02:46:55 GMT",
"version": "v1"
}
] | 2023-01-04 | [
[
"Tichy",
"Wolfgang",
""
],
[
"Ji",
"Liwei",
""
],
[
"Adhikari",
"Ananya",
""
],
[
"Rashti",
"Alireza",
""
],
[
"Pirog",
"Michal",
""
]
] | Interpreting gravitational wave observations and understanding the physics of astrophysical compact objects such as black holes or neutron stars requires accurate theoretical models. Here, we present a new numerical relativity computer program, called Nmesh, that has the design goal to become a next generation program ... |
gr-qc/0306036 | Konstantina Savvidou | Ntina Savvidou | General relativity histories theory II: Invariance groups | 24 pages, submitted to Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 631 | 10.1088/0264-9381/21/2/021 | Imperial/TP/2-03/17 | gr-qc hep-th math-ph math.MP quant-ph | null | We show in detail how the histories description of general relativity carries
representations of both the spacetime diffeomorphisms group and the Dirac
algebra of constraints. We show that the introduction of metric-dependent
equivariant foliations leads to the crucial result that the canonical
constraints are invari... | [
{
"created": "Mon, 9 Jun 2003 15:39:34 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Savvidou",
"Ntina",
""
]
] | We show in detail how the histories description of general relativity carries representations of both the spacetime diffeomorphisms group and the Dirac algebra of constraints. We show that the introduction of metric-dependent equivariant foliations leads to the crucial result that the canonical constraints are invarian... |
1511.00594 | E M Howard Dr. | E M Howard | Geometric aspects of Extremal Kerr black hole entropy | 10 pages, published in Journal of Modern Physics, 2013, 4, 357-363.
arXiv admin note: text overlap with arXiv:hep-th/9608162, arXiv:1201.4017 by
other authors | Journal of Modern Physics, 2013, vol. 4, issue 03, pp. 357-363 | 10.4236/jmp.2013.43050 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Extreme Black holes are an important theoretical laboratory for exploring the
nature of entropy. We suggest that this unusual nature of the extremal limit
could explain the entropy of extremal Kerr black holes. The time-independence
of the extremal black hole, the zero surface gravity, the zero entropy and the
absenc... | [
{
"created": "Tue, 20 Oct 2015 10:31:57 GMT",
"version": "v1"
}
] | 2016-09-23 | [
[
"Howard",
"E M",
""
]
] | Extreme Black holes are an important theoretical laboratory for exploring the nature of entropy. We suggest that this unusual nature of the extremal limit could explain the entropy of extremal Kerr black holes. The time-independence of the extremal black hole, the zero surface gravity, the zero entropy and the absence ... |
1603.09559 | Luigi Seveso | Luigi Seveso, Valerio Peri, Matteo G. A. Paris | Quantum limits to mass sensing in a gravitational field | null | null | 10.1088/1751-8121/aa6cc5 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the problem of estimating the mass of a quantum particle in a
gravitational field and seek the ultimate bounds to precision of
quantum-limited detection schemes. In particular, we study the effect of the
field on the achievable sensitivity and address the question of whether
quantumness of the probe state ... | [
{
"created": "Thu, 31 Mar 2016 12:44:25 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jul 2016 14:14:04 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Sep 2016 09:50:40 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Dec 2016 16:00:33 GMT",
"version": "v4"
}
] | 2017-05-24 | [
[
"Seveso",
"Luigi",
""
],
[
"Peri",
"Valerio",
""
],
[
"Paris",
"Matteo G. A.",
""
]
] | We address the problem of estimating the mass of a quantum particle in a gravitational field and seek the ultimate bounds to precision of quantum-limited detection schemes. In particular, we study the effect of the field on the achievable sensitivity and address the question of whether quantumness of the probe state ma... |
1309.5707 | Kerson Huang | Kerson Huang | Dark Energy and Dark Matter in a Superfluid Universe | Invited talk at the Conference in Honor of 90th Birthday of Freeman
Dyson, Institute of Advanced Studies, Nanyang Technological University,
Singapore, 26-29 August, 2013 | Int. J. Mod. Phys. A, 28 (2013) 1330049 | 10.1142/S021775X13300494 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The vacuum is filled with complex scalar fields, such as the Higgs field.
These fields serve as order parameters for superfluidity (quantum phase
coherence over macroscopic distances), making the entire universe a superfluid.
We review a mathematical model consisting of two aspects: (a) emergence of the
superfluid du... | [
{
"created": "Mon, 23 Sep 2013 06:51:36 GMT",
"version": "v1"
}
] | 2013-11-18 | [
[
"Huang",
"Kerson",
""
]
] | The vacuum is filled with complex scalar fields, such as the Higgs field. These fields serve as order parameters for superfluidity (quantum phase coherence over macroscopic distances), making the entire universe a superfluid. We review a mathematical model consisting of two aspects: (a) emergence of the superfluid duri... |
1501.07089 | Amir H. Abbassi | A.A. Asgari and A.H. Abbassi | Slow-roll inflationary senario in the maximally extended background | 21 pages,n o figures | null | 10.1140/epjc/s10052-015-3792-z | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | During the inflationary epoch,geometry of the universe may be described by
quasi-de Sitter space. On the other hand,maximally extended de Sitter metric in
the comoving coordinates accords with a special FLRW model with positive
spatial curvature,so in this article we focus on the positively curved
inflationary paradi... | [
{
"created": "Wed, 28 Jan 2015 12:50:30 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Asgari",
"A. A.",
""
],
[
"Abbassi",
"A. H.",
""
]
] | During the inflationary epoch,geometry of the universe may be described by quasi-de Sitter space. On the other hand,maximally extended de Sitter metric in the comoving coordinates accords with a special FLRW model with positive spatial curvature,so in this article we focus on the positively curved inflationary paradigm... |
2206.06384 | Gianluca Calcagni | Leonardo Modesto, Gianluca Calcagni | Early universe in quantum gravity | 1+43 pages, 7 figures. v2: nature of beta coefficients and solution
of flatness problem clarified, discussion on spontaneous symmetry breaking
expanded. v3: discussions on background metrics and on singularity problem
resolution substantially clarified, derivation of cosmological spectra moved
to companion pape... | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new picture of the early universe in finite nonlocal quantum
gravity, which is conformally invariant at the classical and quantum levels.
The high-energy regime of the theory consists of two phases, a conformally
invariant trans-Planckian phase and a post-Planckian or Higgs phase described
by an action q... | [
{
"created": "Mon, 13 Jun 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jul 2022 02:57:11 GMT",
"version": "v2"
},
{
"created": "Wed, 29 May 2024 10:56:37 GMT",
"version": "v3"
}
] | 2024-05-30 | [
[
"Modesto",
"Leonardo",
""
],
[
"Calcagni",
"Gianluca",
""
]
] | We present a new picture of the early universe in finite nonlocal quantum gravity, which is conformally invariant at the classical and quantum levels. The high-energy regime of the theory consists of two phases, a conformally invariant trans-Planckian phase and a post-Planckian or Higgs phase described by an action qua... |
1402.4672 | Aleksandar Mikovic | Aleksandar Mikovic | Effective Actions for Regge State-Sum Models of Quantum Gravity | 22 pages, improved presentation, 4 references added | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the semiclassical expansion of the effective action for a Regge
state-sum model and its dependence on the choice of the path-integral measure
and the spectrum of the edge lengths. If the positivity of the edge lengths is
imposed in the effective action equation, we find that the semiclassical
expansion is no... | [
{
"created": "Wed, 19 Feb 2014 14:22:38 GMT",
"version": "v1"
},
{
"created": "Wed, 14 May 2014 13:09:48 GMT",
"version": "v2"
}
] | 2014-05-15 | [
[
"Mikovic",
"Aleksandar",
""
]
] | We study the semiclassical expansion of the effective action for a Regge state-sum model and its dependence on the choice of the path-integral measure and the spectrum of the edge lengths. If the positivity of the edge lengths is imposed in the effective action equation, we find that the semiclassical expansion is not ... |
0904.2904 | Mohammad Nouri-Zonoz | M. Nouri-Zonoz | Vacuum energy and the spacetime index of refraction: A new synthesis | 10 pages, RevTex, more typos corrected (combined with arXiv:1003.0614
published in PRD) | Phys.Rev.D82:044047,2010 | 10.1103/PhysRevD.82.044047 | IPM/A-2009/004 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 1+3 (threading) formulation of general relativity spacetime behaves
analogous to a medium with a specific index of refraction with respect to the
light propagation. Accepting the reality of zero point energy, through the
equivalence principle, we elevate this analogy to the case of virtual photon
propagation in a ... | [
{
"created": "Sun, 19 Apr 2009 10:13:06 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jun 2009 13:34:10 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Oct 2010 09:15:59 GMT",
"version": "v3"
}
] | 2010-10-07 | [
[
"Nouri-Zonoz",
"M.",
""
]
] | In 1+3 (threading) formulation of general relativity spacetime behaves analogous to a medium with a specific index of refraction with respect to the light propagation. Accepting the reality of zero point energy, through the equivalence principle, we elevate this analogy to the case of virtual photon propagation in a qu... |
1505.06917 | Marco Frasca | Marco Frasca | Einstein-Maxwell equations for asymmetric resonant cavities | 17 pages, no figure. Added computation of the scalar field in a
Brans-Dicke-Maxwell theory and proper references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the behavior of electromagnetic fields inside a resonant cavity by
solving Einstein--Maxwell field equations. It is shown that the modified
geometry of space-time inside the cavity due to a propagating mode can affect
the propagation of a laser beam. It is seen that components of laser light with
a shifted... | [
{
"created": "Tue, 26 May 2015 12:14:48 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2016 06:33:06 GMT",
"version": "v2"
}
] | 2016-09-06 | [
[
"Frasca",
"Marco",
""
]
] | We analyze the behavior of electromagnetic fields inside a resonant cavity by solving Einstein--Maxwell field equations. It is shown that the modified geometry of space-time inside the cavity due to a propagating mode can affect the propagation of a laser beam. It is seen that components of laser light with a shifted f... |
1803.09094 | Sergey Cherkas L | S.L. Cherkas and V.L. Kalashnikov | Plasma Perturbations and Cosmic Microwave Background Anisotropy in the
Linearly Expanding Milne-like Universe | 20 pages | Chapter 9 in Fractional Dynamics, Anomalous Transport and Plasma
Science, ed. by Ch. H. Skiadas, Springer, Berlin, (2018) | 10.1007/978-3-030-04483-1 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We expose the scenarios of primordial baryon-photon plasma evolution within
the framework of the Milne-like universe models. Recently, such models find a
second wind and promise an inflation-free solution of a lot of cosmological
puzzles including the cosmological constant one. Metric tensor perturbations
are conside... | [
{
"created": "Sat, 24 Mar 2018 11:22:25 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2018 11:04:05 GMT",
"version": "v2"
}
] | 2019-01-09 | [
[
"Cherkas",
"S. L.",
""
],
[
"Kalashnikov",
"V. L.",
""
]
] | We expose the scenarios of primordial baryon-photon plasma evolution within the framework of the Milne-like universe models. Recently, such models find a second wind and promise an inflation-free solution of a lot of cosmological puzzles including the cosmological constant one. Metric tensor perturbations are considere... |
gr-qc/0506059 | Neil J. Cornish | Neil J. Cornish and Jeff Crowder | LISA Data Analysis using MCMC methods | 14 pages, 7 figures | Phys.Rev. D72 (2005) 043005 | 10.1103/PhysRevD.72.043005 | null | gr-qc astro-ph | null | The Laser Interferometer Space Antenna (LISA) is expected to simultaneously
detect many thousands of low frequency gravitational wave signals. This
presents a data analysis challenge that is very different to the one
encountered in ground based gravitational wave astronomy. LISA data analysis
requires the identificat... | [
{
"created": "Fri, 10 Jun 2005 19:51:28 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cornish",
"Neil J.",
""
],
[
"Crowder",
"Jeff",
""
]
] | The Laser Interferometer Space Antenna (LISA) is expected to simultaneously detect many thousands of low frequency gravitational wave signals. This presents a data analysis challenge that is very different to the one encountered in ground based gravitational wave astronomy. LISA data analysis requires the identificatio... |
gr-qc/0107004 | Tiberiu Harko | M. K. Mak, T. Harko | Exact Dissipative Cosmologies with Stiff Fluid | 7 pages, 6 figures | Europhys.Lett.56:762-767,2001 | 10.1209/epl/i2001-00114-3 | null | gr-qc | null | The general solution of the gravitational field equations in the flat
Friedmann-Robertson-Walker geometry is obtained in the framework of the full
Israel-Stewart-Hiscock theory for a bulk viscous stiff cosmological fluid, with
bulk viscosity coefficient proportional to the energy density.
| [
{
"created": "Mon, 2 Jul 2001 04:53:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mak",
"M. K.",
""
],
[
"Harko",
"T.",
""
]
] | The general solution of the gravitational field equations in the flat Friedmann-Robertson-Walker geometry is obtained in the framework of the full Israel-Stewart-Hiscock theory for a bulk viscous stiff cosmological fluid, with bulk viscosity coefficient proportional to the energy density. |
2309.04157 | Yiqian Chen | Yiqian Chen, Peng Wang, and Haitang Yang | Observations of Orbiting Hot Spots around Naked Singularities | 24 pages, 6 figures, and 3 animated images of intensity for
ancillary. References added and typo corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it has been reported that photons can traverse naked singularities
in the Janis-Newman-Winicour and Born-Infeld spacetimes when these
singularities are appropriately regularized. In this paper, we investigate
observational signatures of hot spots orbiting these naked singularities, with
a focus on discernin... | [
{
"created": "Fri, 8 Sep 2023 06:50:36 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2023 08:14:20 GMT",
"version": "v2"
}
] | 2023-10-11 | [
[
"Chen",
"Yiqian",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | Recently, it has been reported that photons can traverse naked singularities in the Janis-Newman-Winicour and Born-Infeld spacetimes when these singularities are appropriately regularized. In this paper, we investigate observational signatures of hot spots orbiting these naked singularities, with a focus on discerning ... |
1709.04031 | Daniele Pranzetti | Ramit Dey, Stefano Liberati, Daniele Pranzetti | Spacetime thermodynamics in the presence of torsion | 18 pages | Phys. Rev. D 96, 124032 (2017) | 10.1103/PhysRevD.96.124032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was shown by Jacobson in 1995 that the Einstein equation can be derived as
a local constitutive equation for an equilibrium spacetime thermodynamics. With
the aim to understand if such thermodynamical description is an intrinsic
property of gravitation, many attempts have been done so far to generalise this
treatm... | [
{
"created": "Tue, 12 Sep 2017 19:22:07 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Dey",
"Ramit",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | It was shown by Jacobson in 1995 that the Einstein equation can be derived as a local constitutive equation for an equilibrium spacetime thermodynamics. With the aim to understand if such thermodynamical description is an intrinsic property of gravitation, many attempts have been done so far to generalise this treatmen... |
0911.3431 | Muxin Han | Muxin Han, Thomas Thiemann | On the Relation between Rigging Inner Product and Master Constraint
Direct Integral Decomposition | 25 pages | J.Math.Phys.51:092501,2010 | 10.1063/1.3486359 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Canonical quantisation of constrained systems with first class constraints
via Dirac's operator constraint method proceeds by the thory of Rigged Hilbert
spaces, sometimes also called Refined Algebraic Quantisation (RAQ). This method
can work when the constraints form a Lie algebra. When the constraints only
close wi... | [
{
"created": "Tue, 17 Nov 2009 23:53:42 GMT",
"version": "v1"
}
] | 2011-04-07 | [
[
"Han",
"Muxin",
""
],
[
"Thiemann",
"Thomas",
""
]
] | Canonical quantisation of constrained systems with first class constraints via Dirac's operator constraint method proceeds by the thory of Rigged Hilbert spaces, sometimes also called Refined Algebraic Quantisation (RAQ). This method can work when the constraints form a Lie algebra. When the constraints only close with... |
gr-qc/9511012 | Robert Mann | J.D.E. Creighton and R.B. Mann | Thermodynamics of Dilatonic Black Holes in $n$ Dimensions | 27 pages, latex, uses amstex | null | null | WATPHYS TH-95/08 | gr-qc hep-th | null | We present a formalism for studying the thermodynamics of black holes in
dilaton gravity. The thermodynamic variables are defined on a quasilocal
surface surrounding the black hole system and are obtained from a general class
of Lagrangians involving a dilaton. The formalism thus accommodates a large
number of possib... | [
{
"created": "Fri, 3 Nov 1995 00:48:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Creighton",
"J. D. E.",
""
],
[
"Mann",
"R. B.",
""
]
] | We present a formalism for studying the thermodynamics of black holes in dilaton gravity. The thermodynamic variables are defined on a quasilocal surface surrounding the black hole system and are obtained from a general class of Lagrangians involving a dilaton. The formalism thus accommodates a large number of possible... |
1311.5188 | Yi-Cheng Huang | Yi-Cheng Huang | Thermalized Vacuum and Vacuum Effects | 18 pages, 0 figure | null | null | null | gr-qc hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some of the well-known effects regarding the vacuum are revisited under the
formalism of the imaginary-time field theory. From these effects, they could
imply the existence of one thermal vacuum in different circumstances. The
imaginary-time hamiltonian of the vacuum is found to provide not only exact
distribution fu... | [
{
"created": "Thu, 14 Nov 2013 18:18:30 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Dec 2013 02:49:37 GMT",
"version": "v2"
}
] | 2013-12-03 | [
[
"Huang",
"Yi-Cheng",
""
]
] | Some of the well-known effects regarding the vacuum are revisited under the formalism of the imaginary-time field theory. From these effects, they could imply the existence of one thermal vacuum in different circumstances. The imaginary-time hamiltonian of the vacuum is found to provide not only exact distribution func... |
1107.5077 | Ronald Adler | Ronald J. Adler | Genesis and the tipping pencil; why the Universe is flat | 8 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a room with five cosmologists there there may easily be ten theories of
cosmogenesis. Cosmogenesis is a popular topic for speculation because it is
philosophically deep and because such speculations are unlikely to be proven
wrong in the near future. The scenario we present here was intended mainly as a
pedagogica... | [
{
"created": "Thu, 21 Jul 2011 22:23:25 GMT",
"version": "v1"
}
] | 2011-07-27 | [
[
"Adler",
"Ronald J.",
""
]
] | In a room with five cosmologists there there may easily be ten theories of cosmogenesis. Cosmogenesis is a popular topic for speculation because it is philosophically deep and because such speculations are unlikely to be proven wrong in the near future. The scenario we present here was intended mainly as a pedagogical ... |
2402.10984 | Muhammad Sharif | M. Sharif and M. Sallah | Decoupled Charged Anisotropic Spherical Solutions in Rastall Gravity | 38 pages, 16 figures | New Astronomy 109(2024)102198 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper uses the gravitational decoupling through the minimal geometric
deformation approach and extends a known isotropic solution for a
self-gravitating interior to two types of anisotropic spherical solutions in
Rastall gravity in the presence of electromagnetic field. By deforming only the
radial metric compon... | [
{
"created": "Fri, 16 Feb 2024 02:30:32 GMT",
"version": "v1"
}
] | 2024-02-20 | [
[
"Sharif",
"M.",
""
],
[
"Sallah",
"M.",
""
]
] | This paper uses the gravitational decoupling through the minimal geometric deformation approach and extends a known isotropic solution for a self-gravitating interior to two types of anisotropic spherical solutions in Rastall gravity in the presence of electromagnetic field. By deforming only the radial metric componen... |
2308.12182 | Hoi Tim Cheung | Damon H. T. Cheung, Stefano Rinaldi, Martina Toscani and Otto A.
Hannuksela | Mitigating the effect of population model uncertainty on strong lensing
Bayes factor using nonparametric methods | 15 pages, 8 figures | null | null | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Strong lensing of gravitational waves can produce several detectable images
as repeated events in the upcoming observing runs, which can be detected with
the posterior overlap analysis (Bayes factor). The choice of the binary black
hole population plays an important role in the analysis as two
gravitational-wave even... | [
{
"created": "Wed, 23 Aug 2023 15:12:32 GMT",
"version": "v1"
}
] | 2023-08-24 | [
[
"Cheung",
"Damon H. T.",
""
],
[
"Rinaldi",
"Stefano",
""
],
[
"Toscani",
"Martina",
""
],
[
"Hannuksela",
"Otto A.",
""
]
] | Strong lensing of gravitational waves can produce several detectable images as repeated events in the upcoming observing runs, which can be detected with the posterior overlap analysis (Bayes factor). The choice of the binary black hole population plays an important role in the analysis as two gravitational-wave events... |
2307.00603 | Arunoday Sarkar | Arunoday Sarkar and Buddhadeb Ghosh | Constraining an Early Dark Energy Motivated Quintessential
$\alpha$-Attractor Inflaton Potential | 54 pages, 25 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct a new model of quintessential $\alpha$ attractor inflation in
conjunction with the features of non-oscillating early dark energy (EDE).
Slow-roll plateau of this model is obtained, and analyzed in $k$-space, through
the inflaton field and its first-order perturbation over a quasi de-Sitter
metric fluctua... | [
{
"created": "Sun, 2 Jul 2023 16:04:14 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2024 15:40:39 GMT",
"version": "v2"
}
] | 2024-04-15 | [
[
"Sarkar",
"Arunoday",
""
],
[
"Ghosh",
"Buddhadeb",
""
]
] | We construct a new model of quintessential $\alpha$ attractor inflation in conjunction with the features of non-oscillating early dark energy (EDE). Slow-roll plateau of this model is obtained, and analyzed in $k$-space, through the inflaton field and its first-order perturbation over a quasi de-Sitter metric fluctuati... |
gr-qc/9412053 | Harald Soleng | Harald H. Soleng | Dark matter and non-Newtonian gravity from General Relativity coupled to
a fluid of strings | 12 pages, REVTeX, no figures | Gen.Rel.Grav.27:367-378,1995 | 10.1007/BF02107935 | NORDITA 94/69 | gr-qc | null | An exact solution of Einstein's field equations for a point mass surrounded
by a static, spherically symmetric fluid of strings is presented. The solution
is singular at the origin. Near the string cloud limit there is a $1/r$
correction to Newton's force law. It is noted that at large distances and small
acceleratio... | [
{
"created": "Tue, 20 Dec 1994 13:29:07 GMT",
"version": "v1"
}
] | 2010-11-30 | [
[
"Soleng",
"Harald H.",
""
]
] | An exact solution of Einstein's field equations for a point mass surrounded by a static, spherically symmetric fluid of strings is presented. The solution is singular at the origin. Near the string cloud limit there is a $1/r$ correction to Newton's force law. It is noted that at large distances and small accelerations... |
1904.11338 | Danilo Artigas | Danilo Artigas Guimarey, Jakub Mielczarek, Carlo Rovelli | Minisuperspace model of compact phase space gravity | 13 pages, 5 figures | Phys. Rev. D 100, 043533 (2019) | 10.1103/PhysRevD.100.043533 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The kinematical phase space of classical gravitational field is flat (affine)
and unbounded. Because of this, field variables may tend to infinity leading to
appearance of singularities, which plague Einstein's theory of gravity. The
purpose of this article is to study the idea of generalizing the theory of
gravity b... | [
{
"created": "Thu, 25 Apr 2019 13:49:43 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Aug 2019 21:49:32 GMT",
"version": "v2"
}
] | 2019-08-28 | [
[
"Guimarey",
"Danilo Artigas",
""
],
[
"Mielczarek",
"Jakub",
""
],
[
"Rovelli",
"Carlo",
""
]
] | The kinematical phase space of classical gravitational field is flat (affine) and unbounded. Because of this, field variables may tend to infinity leading to appearance of singularities, which plague Einstein's theory of gravity. The purpose of this article is to study the idea of generalizing the theory of gravity by ... |
2303.14235 | Marc Schneider | M. Schneider, F. Del Porro, M. Herrero-Valea, S. Liberati | On the Resilience of Black Hole Evaporation: Gravitational Tunneling
through Universal Horizons | 16 pages, 4 figures, contribution to the proceedings of the
conference: "Avenues of Quantum Field Theory in Curved Space-time", Genova,
14-16. September 2022 | null | 10.1088/1742-6596/2531/1/012013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a quantum tunneling derivation, we show the resilience of Hawking
radiation in Lorentz violating gravity. In particular, we show that the
standard derivation of the Hawking effect in relativistic quantum field theory
can be extended to Lorentz breaking situations thanks to the presence of
universal horizons (ca... | [
{
"created": "Fri, 24 Mar 2023 19:00:01 GMT",
"version": "v1"
}
] | 2023-06-27 | [
[
"Schneider",
"M.",
""
],
[
"Del Porro",
"F.",
""
],
[
"Herrero-Valea",
"M.",
""
],
[
"Liberati",
"S.",
""
]
] | Using a quantum tunneling derivation, we show the resilience of Hawking radiation in Lorentz violating gravity. In particular, we show that the standard derivation of the Hawking effect in relativistic quantum field theory can be extended to Lorentz breaking situations thanks to the presence of universal horizons (caus... |
gr-qc/9307022 | Stephen Lau | James. W. York, Jr | Energy, Temperature, and Entropy of Black Holes Dressed with Quantum
Fields | (In the revised version some problematic fonts have been removed and
some carriage returns added. There are no changes to the text.), 11 pages,
IFP-469 | null | null | null | gr-qc | null | A deeper understanding of the thermal properties of black holes than we
presently have depends to a large degree on obtaining a firmer grasp of the
properties of the entropy. For such an understanding we must at least know the
basic relations among entropy, energy, and temperature of a black hole in
thermal equilibri... | [
{
"created": "Mon, 19 Jul 1993 11:10:43 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jul 1993 18:52:43 GMT",
"version": "v2"
}
] | 2012-08-27 | [
[
"York,",
"James. W.",
"Jr"
]
] | A deeper understanding of the thermal properties of black holes than we presently have depends to a large degree on obtaining a firmer grasp of the properties of the entropy. For such an understanding we must at least know the basic relations among entropy, energy, and temperature of a black hole in thermal equilibrium... |
2112.14063 | James Read | Niels Linnemann and James Read | Constructive Axiomatics in Spacetime Physics Part I: Walkthrough to the
Ehlers-Pirani-Schild Axiomatisation | 38 pages; compiled on LuaLaTeX; critical feedback welcome | null | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ehlers-Pirani-Schild (EPS) constructive axiomatisation of general
relativity, published in 1972, purports to build up the kinematical structure
of that theory from only axioms which have indubitable empirical content. It
is, therefore, of profound significance both to the epistemology and to the
metaphysics of sp... | [
{
"created": "Tue, 28 Dec 2021 09:19:55 GMT",
"version": "v1"
}
] | 2021-12-30 | [
[
"Linnemann",
"Niels",
""
],
[
"Read",
"James",
""
]
] | The Ehlers-Pirani-Schild (EPS) constructive axiomatisation of general relativity, published in 1972, purports to build up the kinematical structure of that theory from only axioms which have indubitable empirical content. It is, therefore, of profound significance both to the epistemology and to the metaphysics of spac... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.