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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0705.1486 | Vishnu Natchu | Vishnu Natchu, Richard A. Matzner | High order convergent multigrid methods on domains containing holes for
black hole initial data | 17 pages, 13 figures | null | null | null | gr-qc | null | It is well known that multigrid methods are optimally efficient for solution
of elliptic equations (O(N)), which means that effort is proportional to the
number of points at which the solution is evaluated). Thus this is an ideal
method to solve the initial data/constraint equations in General Relativity for
(for ins... | [
{
"created": "Thu, 10 May 2007 14:30:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Natchu",
"Vishnu",
""
],
[
"Matzner",
"Richard A.",
""
]
] | It is well known that multigrid methods are optimally efficient for solution of elliptic equations (O(N)), which means that effort is proportional to the number of points at which the solution is evaluated). Thus this is an ideal method to solve the initial data/constraint equations in General Relativity for (for insta... |
2405.05884 | Sakshi Satish Madekar | Sakshi Satish Madekar, Nathan K Johnson-McDaniel, Anuradha Gupta,
Abhirup Ghosh | A meta inspiral-merger-ringdown consistency test of general relativity
with gravitational wave signals from compact binaries | 27 pages, 30 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of gravitational waves from compact binary coalescences is a
promising tool to test the validity of general relativity (GR) in a highly
dynamical strong-field regime. There are now a variety of tests of GR performed
on the observed compact binary signals. In this paper, we propose a new test of
GR tha... | [
{
"created": "Thu, 9 May 2024 16:16:34 GMT",
"version": "v1"
}
] | 2024-05-10 | [
[
"Madekar",
"Sakshi Satish",
""
],
[
"Johnson-McDaniel",
"Nathan K",
""
],
[
"Gupta",
"Anuradha",
""
],
[
"Ghosh",
"Abhirup",
""
]
] | The observation of gravitational waves from compact binary coalescences is a promising tool to test the validity of general relativity (GR) in a highly dynamical strong-field regime. There are now a variety of tests of GR performed on the observed compact binary signals. In this paper, we propose a new test of GR that ... |
gr-qc/0506038 | Hernando Quevedo | Alfredo Macias, Hernando Quevedo, and Alberto Sanchez | On the local Lorentz invariance in N=1 supergravity | null | Phys.Rev. D73 (2006) 027501 | 10.1103/PhysRevD.73.027501 | null | gr-qc | null | We discuss the local Lorentz invariance in the context of N=1 supergravity
and show that a previous attempt to find explicit solutions to the Lorentz
constraint in terms of $\gamma-$matrices is not correct. We improve that
solution by using a different representation of the Lorentz operators in terms
of the generator... | [
{
"created": "Mon, 6 Jun 2005 17:44:47 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Macias",
"Alfredo",
""
],
[
"Quevedo",
"Hernando",
""
],
[
"Sanchez",
"Alberto",
""
]
] | We discuss the local Lorentz invariance in the context of N=1 supergravity and show that a previous attempt to find explicit solutions to the Lorentz constraint in terms of $\gamma-$matrices is not correct. We improve that solution by using a different representation of the Lorentz operators in terms of the generators ... |
1112.3994 | Jonathan Engle | Jonathan Engle and Christopher Beetle | Entropy of generic quantum isolated horizons | 4 pages, contribution to loops '11 conference proceedings; 2
references added, a sentence removed | null | 10.1088/1742-6596/360/1/012037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review our recent proposal of a method to extend the quantization of
spherically symmetric isolated horizons, a seminal result of loop quantum
gravity, to a phase space containing horizons of arbitrary geometry. Although
the details of the quantization remain formally unchanged, the physical
interpretation of the ... | [
{
"created": "Fri, 16 Dec 2011 23:14:10 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2012 04:24:06 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Engle",
"Jonathan",
""
],
[
"Beetle",
"Christopher",
""
]
] | We review our recent proposal of a method to extend the quantization of spherically symmetric isolated horizons, a seminal result of loop quantum gravity, to a phase space containing horizons of arbitrary geometry. Although the details of the quantization remain formally unchanged, the physical interpretation of the re... |
2109.05277 | Yunlong Zheng | Mian Zhu and Yunlong Zheng | Improved DHOST Genesis | 7 pages, 3 figures, version accepted for publication in JHEP | JHEP11(2021)163 | 10.1007/JHEP11(2021)163 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We improve the DHOST Genesis proposed in \cite{Ilyas:2020zcb}, such that the
near scale invariant scalar power spectrum can be generated from the model
itself, without involking extra mechanism like a string gas. Besides, the
superluminality problem of scalar perturbation plagued in \cite{Ilyas:2020zcb}
can be rescue... | [
{
"created": "Sat, 11 Sep 2021 13:27:37 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2021 16:14:49 GMT",
"version": "v2"
}
] | 2021-11-23 | [
[
"Zhu",
"Mian",
""
],
[
"Zheng",
"Yunlong",
""
]
] | We improve the DHOST Genesis proposed in \cite{Ilyas:2020zcb}, such that the near scale invariant scalar power spectrum can be generated from the model itself, without involking extra mechanism like a string gas. Besides, the superluminality problem of scalar perturbation plagued in \cite{Ilyas:2020zcb} can be rescued ... |
gr-qc/0110066 | Hitoshi Kitada | Hitoshi Kitada (U. of Tokyo) | Local Time and the Unification of Physics Part II. Local System | 21 pages (LaTeX) | null | null | KIMS-2001-10-12 | gr-qc | null | As a continuation of Part I [8], a more precise formulation of local time and
local system is given. The observation process is reflected in order to give a
relation between the classical physics for centers of mass of local systems and
the quantum mechanics inside a local system. The relation will give a
unification... | [
{
"created": "Sun, 14 Oct 2001 10:25:46 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2001 00:07:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kitada",
"Hitoshi",
"",
"U. of Tokyo"
]
] | As a continuation of Part I [8], a more precise formulation of local time and local system is given. The observation process is reflected in order to give a relation between the classical physics for centers of mass of local systems and the quantum mechanics inside a local system. The relation will give a unification o... |
1504.02192 | Sava{\AA} Arapo\"Alu | A. Savas Arapoglu | Generalized Slow-roll Inflation in Non-minimally Coupled Theories | New references added. 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The slow-roll field equations for the case of non-minimally coupled scalar
fields are obtained in two ways: first using the direct generalization of
slow-roll conditions in the minimal coupling case to non-minimal one; and,
second, conformal transforming the slow-roll field equations in the Einstein
frame to the Jord... | [
{
"created": "Thu, 9 Apr 2015 05:24:09 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Apr 2015 05:52:22 GMT",
"version": "v2"
}
] | 2016-08-08 | [
[
"Arapoglu",
"A. Savas",
""
]
] | The slow-roll field equations for the case of non-minimally coupled scalar fields are obtained in two ways: first using the direct generalization of slow-roll conditions in the minimal coupling case to non-minimal one; and, second, conformal transforming the slow-roll field equations in the Einstein frame to the Jordan... |
gr-qc/0501064 | T. Damour | Thibault Damour | Cosmological Singularities, Einstein Billiards and Lorentzian Kac-Moody
Algebras | 49 pages, 2 figures, invited talk at Miami Waves 2004 (Conference on
Geometric Analysis, Nonlinear Wave Equations and General Relativity; Miami,
4-10 January 2004), to appear in a special issue of the Journal of Hyperbolic
Differential Equations | null | 10.1142/9789812774804_0005 | null | gr-qc astro-ph hep-th | null | The structure of the general, inhomogeneous solution of (bosonic)
Einstein-matter systems in the vicinity of a cosmological singularity is
considered. We review the proof (based on ideas of
Belinskii-Khalatnikov-Lifshitz and technically simplified by the use of the
Arnowitt-Deser-Misner Hamiltonian formalism) that th... | [
{
"created": "Thu, 20 Jan 2005 16:47:13 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Damour",
"Thibault",
""
]
] | The structure of the general, inhomogeneous solution of (bosonic) Einstein-matter systems in the vicinity of a cosmological singularity is considered. We review the proof (based on ideas of Belinskii-Khalatnikov-Lifshitz and technically simplified by the use of the Arnowitt-Deser-Misner Hamiltonian formalism) that the ... |
0909.3426 | Gerard Hooft 't | Gerard 't Hooft | Quantum gravity without space-time singularities or horizons | 10 pages, 3 figures (postscript). Presented at the Erice Summerschool
of Subnuclear Physics 2009 | null | null | ITP-UU-09/38, SPIN-09/35 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an attempt to re-establish space-time as an essential frame for
formulating quantum gravity - rather than an "emergent" one -, we find that
exact invariance under scale transformations is an essential new ingredient for
such a theory. Use is made of the principle of "black hole complementarity",
the notion that ob... | [
{
"created": "Fri, 18 Sep 2009 13:36:57 GMT",
"version": "v1"
}
] | 2009-09-21 | [
[
"Hooft",
"Gerard 't",
""
]
] | In an attempt to re-establish space-time as an essential frame for formulating quantum gravity - rather than an "emergent" one -, we find that exact invariance under scale transformations is an essential new ingredient for such a theory. Use is made of the principle of "black hole complementarity", the notion that obse... |
1104.1297 | Subenoy Chakraborty | Sudeshna Mukerji, Ritabrata Biswas, Nairwita Mazumder, Subenoy
Chakraborty | How does Inflation Depend Upon the Nature of Fluids Filling Up the
Universe in Brane World Scenario | 20 pages | null | 10.1007/s10509-011-0828-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By constructing different parameters which are able to give us the
information about our universe during inflation,(specially at the start and the
end of the inflationary universe) a brief idea of brane world inflation is
given in this work. What will be the size of the universe at the end of
inflation,i.e.,how many ... | [
{
"created": "Thu, 7 Apr 2011 10:57:34 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Mukerji",
"Sudeshna",
""
],
[
"Biswas",
"Ritabrata",
""
],
[
"Mazumder",
"Nairwita",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | By constructing different parameters which are able to give us the information about our universe during inflation,(specially at the start and the end of the inflationary universe) a brief idea of brane world inflation is given in this work. What will be the size of the universe at the end of inflation,i.e.,how many ti... |
1108.2277 | Joel Franklin | S. Deser and J. Franklin | No Bel-Robinson Tensor for Quadratic Curvature Theories | published version | Class. Quantum Grav. 28 (2011) 235016 | 10.1088/0264-9381/28/23/235016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to generalize the familiar covariantly conserved Bel-Robinson
tensor B_{mnab} ~ R R of GR and its recent topologically massive third
derivative order counterpart B ~ RDR, to quadratic curvature actions. Two very
different models of current interest are examined: fourth order D=3 "new
massive", and second o... | [
{
"created": "Wed, 10 Aug 2011 20:07:25 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2011 22:55:40 GMT",
"version": "v2"
}
] | 2011-11-22 | [
[
"Deser",
"S.",
""
],
[
"Franklin",
"J.",
""
]
] | We attempt to generalize the familiar covariantly conserved Bel-Robinson tensor B_{mnab} ~ R R of GR and its recent topologically massive third derivative order counterpart B ~ RDR, to quadratic curvature actions. Two very different models of current interest are examined: fourth order D=3 "new massive", and second ord... |
2310.08927 | Ollie Burke Dr | Ollie Burke, Gabriel Andres Piovano, Niels Warburton, Philip Lynch,
Lorenzo Speri, Chris Kavanagh, Barry Wardell, Adam Pound, Leanne Durkan,
Jeremy Miller | Accuracy Requirements: Assessing the Importance of First Post-Adiabatic
Terms for Small-Mass-Ratio Binaries | 25 + 11 pages, 10 figures, 5 tables, accepted for publication in PRD.
Minor corrections to figures and new appendix on 1PA corrections to the EMRI
waveform amplitudes | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We investigate the impact of post-adiabatic (1PA) terms on parameter
estimation for extreme and intermediate mass-ratio inspirals using
state-of-the-art waveform models. Our analysis is the first to employ Bayesian
inference to assess systematic errors for 1PA waveforms. We find that
neglecting 1PA terms introduces s... | [
{
"created": "Fri, 13 Oct 2023 07:50:28 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Oct 2023 11:59:59 GMT",
"version": "v2"
},
{
"created": "Thu, 23 May 2024 06:36:10 GMT",
"version": "v3"
}
] | 2024-05-24 | [
[
"Burke",
"Ollie",
""
],
[
"Piovano",
"Gabriel Andres",
""
],
[
"Warburton",
"Niels",
""
],
[
"Lynch",
"Philip",
""
],
[
"Speri",
"Lorenzo",
""
],
[
"Kavanagh",
"Chris",
""
],
[
"Wardell",
"Barry",
""
],
... | We investigate the impact of post-adiabatic (1PA) terms on parameter estimation for extreme and intermediate mass-ratio inspirals using state-of-the-art waveform models. Our analysis is the first to employ Bayesian inference to assess systematic errors for 1PA waveforms. We find that neglecting 1PA terms introduces sig... |
1304.7686 | Parampreet Singh | Brajesh Gupt, Parampreet Singh | A quantum gravitational inflationary scenario in Bianchi-I spacetime | 35 pages, 19 figures. References added. Minor changes to match
published version. To appear in CQG | Class. Quantum Grav. 30 145013 (2013) | 10.1088/0264-9381/30/14/145013 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the $\phi^2$ inflationary model in the Bianchi-I spacetime
using effective spacetime description of loop quantum cosmology to understand
the issues of the resolution of initial singularity, isotropization, effect of
anisotropies on amount of inflation, and the phase space attractors in the
presence of ... | [
{
"created": "Mon, 29 Apr 2013 15:31:45 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2013 15:12:50 GMT",
"version": "v2"
}
] | 2013-07-11 | [
[
"Gupt",
"Brajesh",
""
],
[
"Singh",
"Parampreet",
""
]
] | We investigate the $\phi^2$ inflationary model in the Bianchi-I spacetime using effective spacetime description of loop quantum cosmology to understand the issues of the resolution of initial singularity, isotropization, effect of anisotropies on amount of inflation, and the phase space attractors in the presence of no... |
1707.02438 | Dmitri Fursaev | D.V. Fursaev | Physical effects of massless cosmic strings | 14 pages, 4 figures | Phys. Rev. D 96, 104005 (2017) | 10.1103/PhysRevD.96.104005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study massless cosmic strings which are one-dimensional objects moving
with the speed of light. Perturbations of velocities of test bodies and
anisotropy of cosmic microwave background generated by massless cosmic strings
are analysed. These phenomena are analogous to the string wake effect and the
Kaiser-Stebbins... | [
{
"created": "Sat, 8 Jul 2017 13:17:49 GMT",
"version": "v1"
}
] | 2017-11-15 | [
[
"Fursaev",
"D. V.",
""
]
] | We study massless cosmic strings which are one-dimensional objects moving with the speed of light. Perturbations of velocities of test bodies and anisotropy of cosmic microwave background generated by massless cosmic strings are analysed. These phenomena are analogous to the string wake effect and the Kaiser-Stebbins e... |
2012.13960 | Malay K. Nandy | Arun Mathew and Malay K. Nandy | Primordial reheating in $f(R)$ cosmology by spontaneous decay of
scalarons | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ a viable $f(R)$ gravity model capable of giving an inflationary
phase in order to study the subsequent reheating phase due to particle creation
at the expense of energy in the scalaron field. Since quantum mechanics is
expected to play a dominant role in particle creation, we formulate a plausible
scenario ... | [
{
"created": "Sun, 27 Dec 2020 15:13:20 GMT",
"version": "v1"
},
{
"created": "Sat, 6 May 2023 11:05:43 GMT",
"version": "v2"
}
] | 2023-05-09 | [
[
"Mathew",
"Arun",
""
],
[
"Nandy",
"Malay K.",
""
]
] | We employ a viable $f(R)$ gravity model capable of giving an inflationary phase in order to study the subsequent reheating phase due to particle creation at the expense of energy in the scalaron field. Since quantum mechanics is expected to play a dominant role in particle creation, we formulate a plausible scenario of... |
2312.07376 | Mukesh Kumar Singh | Mukesh Kumar Singh, Shasvath J Kapadia, Aditya Vijaykumar,
Parameswaran Ajith | Impact of higher harmonics of gravitational radiation on the population
inference of binary black holes | 13 pages, 7 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Templates modeling just the dominant mode of gravitational radiation are
generally sufficient for the unbiased parameter inference of near-equal-mass
compact binary mergers. However, neglecting the subdominant modes can bias the
inference if the binary is significantly asymmetric, very massive, or has
misaligned spin... | [
{
"created": "Tue, 12 Dec 2023 15:44:28 GMT",
"version": "v1"
}
] | 2023-12-13 | [
[
"Singh",
"Mukesh Kumar",
""
],
[
"Kapadia",
"Shasvath J",
""
],
[
"Vijaykumar",
"Aditya",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | Templates modeling just the dominant mode of gravitational radiation are generally sufficient for the unbiased parameter inference of near-equal-mass compact binary mergers. However, neglecting the subdominant modes can bias the inference if the binary is significantly asymmetric, very massive, or has misaligned spins.... |
gr-qc/0408041 | Alessandro Nagar | Alessandro Nagar and Guillermo Diaz | Fluid accretion onto relativistic stars and gravitational radiation | 6 pages and 2 figures. To appear in the proceedings of the 27th
Spanish Relativity Meeting - Gravitational Radiation - ERE 2003 -Alicante
(Spain) -Sep. 11-13 (2003) | null | null | null | gr-qc | null | This article reports results from numerical simulations of the gravitational
radiation emitted from nonrotating relativistic stars as a result of the
axisymmetric accretion of layers of perfect fluid matter, shaped in the form of
quadrupolar shells. We adopt a {\em hybrid} procedure where we evolve
numerically the po... | [
{
"created": "Sun, 15 Aug 2004 22:21:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nagar",
"Alessandro",
""
],
[
"Diaz",
"Guillermo",
""
]
] | This article reports results from numerical simulations of the gravitational radiation emitted from nonrotating relativistic stars as a result of the axisymmetric accretion of layers of perfect fluid matter, shaped in the form of quadrupolar shells. We adopt a {\em hybrid} procedure where we evolve numerically the pola... |
gr-qc/0503047 | Alfredo Sandoval-Villalbazo | L.S. Garcia-Colin and A. Sandoval-Villalbazo | Relativistic non-equilibrium thermodynamics revisited | 11 pages, no figures | J.Nonequil.Thermo. 31 (2006) 11-22 | 10.1515/JNETDY.2006.002 | null | gr-qc | null | Relativistic irreversible thermodynamics is reformulated following the
conventional approach proposed by Meixner in the non-relativistic case. Clear
separation between mechanical and non-mechanical energy fluxes is made. The
resulting equations for the entropy production and the local internal energy
have the same st... | [
{
"created": "Fri, 11 Mar 2005 00:24:52 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2005 00:30:35 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Garcia-Colin",
"L. S.",
""
],
[
"Sandoval-Villalbazo",
"A.",
""
]
] | Relativistic irreversible thermodynamics is reformulated following the conventional approach proposed by Meixner in the non-relativistic case. Clear separation between mechanical and non-mechanical energy fluxes is made. The resulting equations for the entropy production and the local internal energy have the same stru... |
gr-qc/9507050 | Luis Octavio Pimentel | Pimentel L O | Electromagnetic Field in Some Anisotropic Stiff Fluid Universes | 6 pages, REVTEX,no figures | Mod.Phys.Lett. A10 (1995) 2095-2102 | null | UAMI-AG-95-29 | gr-qc | null | The electromagnetic field is studied in a family of exact solutions of the
Einstein equations whose material content is a perfect fluid with stiff
equation of state (p = $\epsilon $ ). The field equations are solved exactly
for several members of the family.
| [
{
"created": "Tue, 25 Jul 1995 16:19:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"O",
"Pimentel L",
""
]
] | The electromagnetic field is studied in a family of exact solutions of the Einstein equations whose material content is a perfect fluid with stiff equation of state (p = $\epsilon $ ). The field equations are solved exactly for several members of the family. |
1506.02440 | Ernesto Nungesser | Ho Lee and Ernesto Nungesser | Future global existence and asymptotic behaviour of solutions to the
Einstein-Boltzmann system with Bianchi I symmetry | 39 pages. Typos fixed, references added and relation to previous work
clarified | Journal of Differential Equations Volume 262, Issue 11, 5 June
2017, Pages 5425-5467 | 10.1016/j.jde.2017.02.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the Einstein-Boltzmann system with Bianchi I symmetry.
Isotropization of Bianchi I spacetimes was proved in [13] in the Vlasov case,
and asymptotic behaviour of the relativistic Boltzmann equation was studied in
[9] in the isotropic case. These results are generalized in the present paper
to th... | [
{
"created": "Mon, 8 Jun 2015 11:17:08 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2016 07:37:59 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Lee",
"Ho",
""
],
[
"Nungesser",
"Ernesto",
""
]
] | In this paper we study the Einstein-Boltzmann system with Bianchi I symmetry. Isotropization of Bianchi I spacetimes was proved in [13] in the Vlasov case, and asymptotic behaviour of the relativistic Boltzmann equation was studied in [9] in the isotropic case. These results are generalized in the present paper to the ... |
0910.0758 | Domenico Gerardi | D. Gerardi, G. Allen, J. W. Conklin, K-X. Sun, D. DeBra, S. Buchman,
P. Gath, W. Fichter, R. L. Byer, U. Johann | Advanced drag-free concepts for future space-based interferometers:
acceleration noise performance | 22 pages, being submitted to Classical and Quantum Gravity | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Future drag-free missions for space-based experiments in gravitational
physics require a Gravitational Reference Sensor with extremely demanding
sensing and disturbance reduction requirements. A configuration with two
cubical sensors is the current baseline for the Laser Interferometer Space
Antenna (LISA) and has re... | [
{
"created": "Mon, 5 Oct 2009 13:21:38 GMT",
"version": "v1"
}
] | 2009-10-06 | [
[
"Gerardi",
"D.",
""
],
[
"Allen",
"G.",
""
],
[
"Conklin",
"J. W.",
""
],
[
"Sun",
"K-X.",
""
],
[
"DeBra",
"D.",
""
],
[
"Buchman",
"S.",
""
],
[
"Gath",
"P.",
""
],
[
"Fichter",
"W.",
""
... | Future drag-free missions for space-based experiments in gravitational physics require a Gravitational Reference Sensor with extremely demanding sensing and disturbance reduction requirements. A configuration with two cubical sensors is the current baseline for the Laser Interferometer Space Antenna (LISA) and has reac... |
1802.02459 | Miftachul Hadi | Malcolm Anderson, Miftachul Hadi, Andri Husein | Vortex Solution of the Gravitational Field Equation of a Twisted Skyrme
Strings | 13 pages, 12 figures. arXiv admin note: substantial text overlap with
arXiv:1505.05930, arXiv:1710.01250 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct non-linear sigma model plus Skyrme term (Skyrme model) with a
twist in the gravitational field. To simplify the solution, first we examine
non-linear sigma model without Skyrme term, in particular with a twist, which
comprises a vortex solution with an added dependence on a twist term $mkz$,
where $z$ is... | [
{
"created": "Tue, 6 Feb 2018 12:27:40 GMT",
"version": "v1"
}
] | 2018-02-08 | [
[
"Anderson",
"Malcolm",
""
],
[
"Hadi",
"Miftachul",
""
],
[
"Husein",
"Andri",
""
]
] | We construct non-linear sigma model plus Skyrme term (Skyrme model) with a twist in the gravitational field. To simplify the solution, first we examine non-linear sigma model without Skyrme term, in particular with a twist, which comprises a vortex solution with an added dependence on a twist term $mkz$, where $z$ is t... |
1601.00785 | Stefano Liberati | Stefano Liberati | Do not mess with time: Probing faster than light travel and chronology
protection with superluminal warp drives | 8 pages; Contribution to the proceedings of "The Fourtheenth Marcel
Grossmann Meeting on General Relativity" based on an invited talk delivered
at the AT3 parallel session | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While General Relativity ranks undoubtedly among the best physics theories
ever developed, it is also among those with the most striking implications. In
particular, General Relativity admits solutions which allow faster than light
motion and consequently time travel. Here we shall consider a "pre-emptive"
chronology... | [
{
"created": "Tue, 5 Jan 2016 10:33:29 GMT",
"version": "v1"
}
] | 2016-01-06 | [
[
"Liberati",
"Stefano",
""
]
] | While General Relativity ranks undoubtedly among the best physics theories ever developed, it is also among those with the most striking implications. In particular, General Relativity admits solutions which allow faster than light motion and consequently time travel. Here we shall consider a "pre-emptive" chronology p... |
gr-qc/0407097 | Modeso | Leonardo Modesto | Disappearance of Black Hole Singularity in Quantum Gravity | 9 pages, latex; references added | Phys.Rev.D70:124009,2004 | 10.1103/PhysRevD.70.124009 | null | gr-qc | null | We apply techniques recently introduced in quantum cosmology to the
Schwarzschild metric inside the horizon and near the black hole singularity at
r = 0. In particular, we use the quantization introduced by Husain and Winkler,
which is suggested by Loop Quantum Gravity and is based on an alternative to
the Schrodinge... | [
{
"created": "Mon, 26 Jul 2004 18:36:47 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Aug 2004 12:23:10 GMT",
"version": "v2"
}
] | 2011-07-18 | [
[
"Modesto",
"Leonardo",
""
]
] | We apply techniques recently introduced in quantum cosmology to the Schwarzschild metric inside the horizon and near the black hole singularity at r = 0. In particular, we use the quantization introduced by Husain and Winkler, which is suggested by Loop Quantum Gravity and is based on an alternative to the Schrodinger ... |
0712.1250 | Surjeet Rajendran | Savas Dimopoulos, Peter W. Graham, Jason M. Hogan, Mark A. Kasevich,
Surjeet Rajendran | Gravitational Wave Detection with Atom Interferometry | 5 pages, 5 figures, updated with journal reference | Physics Letters B 678 (2009), pp. 37-40 | 10.1016/j.physletb.2009.06.011 | null | gr-qc astro-ph hep-ph hep-th physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose two distinct atom interferometer gravitational wave detectors, one
terrestrial and another satellite-based, utilizing the core technology of the
Stanford $10 \text{m}$ atom interferometer presently under construction. The
terrestrial experiment can operate with strain sensitivity $ \sim
\frac{10^{-19}}{\sq... | [
{
"created": "Sat, 8 Dec 2007 04:32:38 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jun 2009 15:29:48 GMT",
"version": "v2"
}
] | 2009-06-22 | [
[
"Dimopoulos",
"Savas",
""
],
[
"Graham",
"Peter W.",
""
],
[
"Hogan",
"Jason M.",
""
],
[
"Kasevich",
"Mark A.",
""
],
[
"Rajendran",
"Surjeet",
""
]
] | We propose two distinct atom interferometer gravitational wave detectors, one terrestrial and another satellite-based, utilizing the core technology of the Stanford $10 \text{m}$ atom interferometer presently under construction. The terrestrial experiment can operate with strain sensitivity $ \sim \frac{10^{-19}}{\sqrt... |
1012.1692 | Josep M. Pons | Naresh Dadhich and Josep M. Pons | Consistent Levi Civita truncation uniquely characterizes the Lovelock
Lagrangians | 10 pages. Title slightly changed to emphasize the result. Matches
published version | Phys Lett B 705 (2011) 139-142 | 10.1016/j.physletb.2011.09.108 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define the concept of Levi Civita truncation for a Lagrangian in the
Palatini formulation with an arbitrary connection, and show that its
consistency uniquely identifies the Lovelock Lagrangians.
| [
{
"created": "Wed, 8 Dec 2010 07:02:53 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Oct 2011 07:18:24 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Dadhich",
"Naresh",
""
],
[
"Pons",
"Josep M.",
""
]
] | We define the concept of Levi Civita truncation for a Lagrangian in the Palatini formulation with an arbitrary connection, and show that its consistency uniquely identifies the Lovelock Lagrangians. |
gr-qc/0506022 | Erika Cerasti | Erika Cerasti and Giovanni Montani | Generating functional for the gravitational field: implementation of an
evolutionary quantum dynamics | 23 pages, no figures, to appear on International Journal of Modern
Physics D | Int.J.Mod.Phys. D14 (2005) 1739-1760 | 10.1142/S0218271805007267 | null | gr-qc | null | We provide a generating functional for the gravitational field, associated to
the relaxation of the primary constraints as extended to the quantum sector.
This requirement of the theory, relies on the assumption that a suitable time
variable exist, when taking the T-products of the dynamical variables. More
precisely... | [
{
"created": "Mon, 6 Jun 2005 12:40:08 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cerasti",
"Erika",
""
],
[
"Montani",
"Giovanni",
""
]
] | We provide a generating functional for the gravitational field, associated to the relaxation of the primary constraints as extended to the quantum sector. This requirement of the theory, relies on the assumption that a suitable time variable exist, when taking the T-products of the dynamical variables. More precisely, ... |
1606.02999 | David Garfinkle | David Garfinkle | Numerical Relativity Beyond Astrophysics | Review paper submitted to Reports on Progress in Physics | null | 10.1088/0034-4885/80/1/016901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Though the main applications of computer simulations in relativity are to
astrophysical systems such as black holes and neutron stars, nonetheless there
are important applications of numerical methods to the investigation of general
relativity as a fundamental theory of the nature of space and time. This paper
gives ... | [
{
"created": "Thu, 9 Jun 2016 15:32:37 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Garfinkle",
"David",
""
]
] | Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an... |
2110.06957 | Matteo Breschi | Matteo Breschi, Sebastiano Bernuzzi, Daniel Godzieba, Albino Perego,
David Radice | Constraints on the maximum densities of neutron stars from postmerger
gravitational waves with third-generation observations | null | null | 10.1103/PhysRevLett.128.161102 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Using data from 289 numerical relativity simulations of merging binary
neutron stars, we identify, for the first time, a robust quasi-universal
relation connecting the postmerger peak gravitational-wave frequency and the
value of the density at the center of the maximum mass nonrotating neutron
star. This relation of... | [
{
"created": "Wed, 13 Oct 2021 18:00:46 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Nov 2021 20:18:59 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Apr 2022 08:06:54 GMT",
"version": "v3"
}
] | 2022-05-04 | [
[
"Breschi",
"Matteo",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Godzieba",
"Daniel",
""
],
[
"Perego",
"Albino",
""
],
[
"Radice",
"David",
""
]
] | Using data from 289 numerical relativity simulations of merging binary neutron stars, we identify, for the first time, a robust quasi-universal relation connecting the postmerger peak gravitational-wave frequency and the value of the density at the center of the maximum mass nonrotating neutron star. This relation offe... |
1304.3937 | Yosef Zlochower | Carlos O. Lousto, Yosef Zlochower | Exploring the Outer Limits of Numerical Relativity | Revised version with longer and waveforms, new plots showing omega
versus proper distance, a list of orbital periods and eccentricity, and a
dozen new references | Phys. Rev. D 88, 024001 (2013) | 10.1103/PhysRevD.88.024001 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform several black-hole binary evolutions using fully nonlinear
numerical relativity techniques at separations large enough that low-order
post-Newtonian expansions are expected to be accurate. As a case study, we
evolve an equal-mass nonspinning black-hole binary from a quasicircular orbit
at an initial coordi... | [
{
"created": "Sun, 14 Apr 2013 19:37:39 GMT",
"version": "v1"
},
{
"created": "Mon, 20 May 2013 20:47:00 GMT",
"version": "v2"
}
] | 2013-07-04 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We perform several black-hole binary evolutions using fully nonlinear numerical relativity techniques at separations large enough that low-order post-Newtonian expansions are expected to be accurate. As a case study, we evolve an equal-mass nonspinning black-hole binary from a quasicircular orbit at an initial coordina... |
1612.01807 | Claus Kiefer | Claus Kiefer and Branislav Nikolic | Notes on semiclassical Weyl gravity | 16 pages, invited contribution to the Paddy Festschrift | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In any quantum theory of gravity, it is of the utmost importance to recover
the limit of quantum theory in an external spacetime. In quantum
geometrodynamics (quantization of general relativity in the Schr\"odinger
picture), this leads in particular to the recovery of a semiclassical (WKB)
time which governs the dyna... | [
{
"created": "Tue, 6 Dec 2016 14:08:44 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Kiefer",
"Claus",
""
],
[
"Nikolic",
"Branislav",
""
]
] | In any quantum theory of gravity, it is of the utmost importance to recover the limit of quantum theory in an external spacetime. In quantum geometrodynamics (quantization of general relativity in the Schr\"odinger picture), this leads in particular to the recovery of a semiclassical (WKB) time which governs the dynami... |
0706.3467 | Burin Gumjudpai | Burin Gumjudpai (TPTP Naresuan U.) | Coupled phantom field in loop quantum cosmology | 5 pages, 5 figures, invited talk at the SIAM Physics Congress 2007
and the Thai National Astronomy Meeting 2007, Nakorn Pathom, Thailand | Thai Journal of Physics Series 3: Proceedings of the SIAM Physics
Congress 2007 and the Thai National Astronomy Meeting 2007 | null | null | gr-qc astro-ph hep-th | null | A model of phantom scalar field dark energy under exponential potential
coupling to barotropic dark matter fluid in loop quantum cosmology is addressed
here. We derive a closed-autonomous system for cosmological dynamics in this
scenario. The expansion in loop quantum universe has a bounce even in presence
of the pha... | [
{
"created": "Sat, 23 Jun 2007 17:49:27 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jul 2007 16:50:14 GMT",
"version": "v2"
}
] | 2008-04-18 | [
[
"Gumjudpai",
"Burin",
"",
"TPTP Naresuan U."
]
] | A model of phantom scalar field dark energy under exponential potential coupling to barotropic dark matter fluid in loop quantum cosmology is addressed here. We derive a closed-autonomous system for cosmological dynamics in this scenario. The expansion in loop quantum universe has a bounce even in presence of the phant... |
2406.03185 | Eric Poisson | Tom Cadogan and Eric Poisson | Self-gravitating anisotropic fluids. I: Context and overview | 13 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is the first in a sequence of three devoted to the formulation of
a theory of self-gravitating anisotropic fluids in both Newtonian and
relativistic gravity. In this first paper we set the stage, place our work in
the context of a vast literature on anisotropic stars in general relativity,
and provide an o... | [
{
"created": "Wed, 5 Jun 2024 12:15:34 GMT",
"version": "v1"
}
] | 2024-06-06 | [
[
"Cadogan",
"Tom",
""
],
[
"Poisson",
"Eric",
""
]
] | This paper is the first in a sequence of three devoted to the formulation of a theory of self-gravitating anisotropic fluids in both Newtonian and relativistic gravity. In this first paper we set the stage, place our work in the context of a vast literature on anisotropic stars in general relativity, and provide an ove... |
2101.02207 | Grigoris Panotopoulos | Pedro H.R.S. Moraes, Grigoris Panotopoulos and Ilidio Lopes | Anisotropic Dark Matter Stars | Minor corrections, references added | Phys. Rev. D 103, 084023 (2021) | 10.1103/PhysRevD.103.084023 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of exotic stars are investigated. In particular, we study
objects made entirely of dark matter and we take into account intrinsic
anisotropies which have been ignored so far. We obtain exact analytical
solutions to the structure equations and we we show that those solutions i) are
well behaved within G... | [
{
"created": "Wed, 6 Jan 2021 12:28:34 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Jan 2021 19:40:49 GMT",
"version": "v2"
}
] | 2021-04-21 | [
[
"Moraes",
"Pedro H. R. S.",
""
],
[
"Panotopoulos",
"Grigoris",
""
],
[
"Lopes",
"Ilidio",
""
]
] | The properties of exotic stars are investigated. In particular, we study objects made entirely of dark matter and we take into account intrinsic anisotropies which have been ignored so far. We obtain exact analytical solutions to the structure equations and we we show that those solutions i) are well behaved within Gen... |
1401.6649 | Hoda Farahani | J. Sadeghi, M. Khurshudyan and H. Farahani | Interacting Ghost Dark Energy Models in the Higher Dimensional Cosmology | 13 pages, 6 figures. arXiv admin note: text overlap with
arXiv:1308.3450 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate interacting ghost dark energy models in higher dimensional
cosmology. We attempt to model dark matter within a barotropic fluid with
$P_{b}=\omega(t)_{b}\rho$. In this work we consider four different models based
on choosing equation of state parameter and interaction term. We confirm that
our models a... | [
{
"created": "Sun, 26 Jan 2014 13:45:26 GMT",
"version": "v1"
},
{
"created": "Tue, 24 May 2016 06:14:28 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Sadeghi",
"J.",
""
],
[
"Khurshudyan",
"M.",
""
],
[
"Farahani",
"H.",
""
]
] | We investigate interacting ghost dark energy models in higher dimensional cosmology. We attempt to model dark matter within a barotropic fluid with $P_{b}=\omega(t)_{b}\rho$. In this work we consider four different models based on choosing equation of state parameter and interaction term. We confirm that our models agr... |
2407.18089 | W. A. Sabra | W. A. Sabra | Metrics depending on one variable in D-dimensional Einstein-Maxwell
Theory | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present new families of solutions of D-dimensional Einstein-Maxwell theory
depending on one variable for all space-time signatures. The solutions found
can be thought of as generalized Melvin solutions including fluxtubes, domain
walls and cosmological space-times. Explicit examples are given in four and
five spac... | [
{
"created": "Thu, 25 Jul 2024 14:51:11 GMT",
"version": "v1"
}
] | 2024-07-26 | [
[
"Sabra",
"W. A.",
""
]
] | We present new families of solutions of D-dimensional Einstein-Maxwell theory depending on one variable for all space-time signatures. The solutions found can be thought of as generalized Melvin solutions including fluxtubes, domain walls and cosmological space-times. Explicit examples are given in four and five space-... |
1402.3544 | Christopher J. Fewster | Christopher J Fewster and Stefano Liberati | Quantum fields in curved space-time, semiclassical gravity, quantum
gravity phenomenology, and analogue models: Report on session D4 at GR20 | 15pp. To appear in the GR20 Proceedings issue of General Relativity
and Gravitation | Gen Relativ Gravit (2014) 46: 1707 | 10.1007/s10714-014-1707-1 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The talks given in parallel session D4 at the 20th International Conference
on General Relativity and Gravitation (Warsaw 2013) are summarized.
| [
{
"created": "Fri, 14 Feb 2014 18:27:35 GMT",
"version": "v1"
}
] | 2016-08-29 | [
[
"Fewster",
"Christopher J",
""
],
[
"Liberati",
"Stefano",
""
]
] | The talks given in parallel session D4 at the 20th International Conference on General Relativity and Gravitation (Warsaw 2013) are summarized. |
gr-qc/0509001 | Marcelo Salgado | Marcelo Salgado | The Cauchy problem of scalar-tensor theories of gravity | 29 pages Revtex; typos corrected; references added and updated; a
shorter version of this paper was published in Classical and Quantum Gravity | Class.Quant.Grav. 23 (2006) 4719-4742 | 10.1088/0264-9381/23/14/010 | null | gr-qc astro-ph math-ph math.MP | null | The 3+1 formulation of scalar-tensor theories of gravity (STT) is obtained in
the physical (Jordan) frame departing from the 4+0 covariant field equations.
Contrary to the common belief (folklore), the new system of ADM-like equations
shows that the Cauchy problem of STT is well formulated (in the sense that the
whol... | [
{
"created": "Wed, 31 Aug 2005 20:08:46 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Aug 2006 22:40:23 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Salgado",
"Marcelo",
""
]
] | The 3+1 formulation of scalar-tensor theories of gravity (STT) is obtained in the physical (Jordan) frame departing from the 4+0 covariant field equations. Contrary to the common belief (folklore), the new system of ADM-like equations shows that the Cauchy problem of STT is well formulated (in the sense that the whole ... |
1002.0641 | Kiyoshi Shiraishi | Nahomi Kan (Yamaguchi Junior College), Kiyoshi Shiraishi (Yamaguchi
University) | Boson Stars under Deconstruction | 4 pages, 4 figures. To appear in the Proceedings of 19th Workshop in
General Relativity and Gravitation in Japan (JGRG19), held in Rikkyo
University, Tokyo, Japan (30 November - 4 December 2009). References added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study solutions for boson stars in multiscalar theory. We start with
simple models with N scalar theories. Our purpose is to study the models in
which the mass matrix of scalars and the scalar couplings are given by an
extended method of dimensional deconstruction. The properties of the boson
stars are investigate... | [
{
"created": "Wed, 3 Feb 2010 04:00:26 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Feb 2010 01:11:55 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Feb 2010 08:11:10 GMT",
"version": "v3"
}
] | 2010-02-15 | [
[
"Kan",
"Nahomi",
"",
"Yamaguchi Junior College"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi\n University"
]
] | We study solutions for boson stars in multiscalar theory. We start with simple models with N scalar theories. Our purpose is to study the models in which the mass matrix of scalars and the scalar couplings are given by an extended method of dimensional deconstruction. The properties of the boson stars are investigated ... |
1705.04370 | Giuseppe Papallo | Giuseppe Papallo and Harvey S. Reall | On the local well-posedness of Lovelock and Horndeski theories | v3: typos corrected and journal reference added. v2: results
strengthened by requiring the generalised harmonic gauge condition for the
linearised theory to arise as the linearisation of a generalised harmonic
gauge condition for the nonlinear theory (discussion added at the end of Sec.
4.4). Added reference an... | Phys. Rev. D 96, 044019 (2017) | 10.1103/PhysRevD.96.044019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate local well-posedness of the initial value problem for Lovelock
and Horndeski theories of gravity. A necessary condition for local
well-posedness is strong hyperbolicity of the equations of motion. Even weak
hyperbolicity can fail for strong fields so we restrict to weak fields. The
Einstein equation is... | [
{
"created": "Thu, 11 May 2017 20:05:54 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2017 14:28:32 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Aug 2017 21:18:20 GMT",
"version": "v3"
}
] | 2017-08-21 | [
[
"Papallo",
"Giuseppe",
""
],
[
"Reall",
"Harvey S.",
""
]
] | We investigate local well-posedness of the initial value problem for Lovelock and Horndeski theories of gravity. A necessary condition for local well-posedness is strong hyperbolicity of the equations of motion. Even weak hyperbolicity can fail for strong fields so we restrict to weak fields. The Einstein equation is k... |
gr-qc/0701082 | Stefano Ansoldi | Stefano Ansoldi | Braneworlds and Quantum States of Relativistic Shells | 4 pages, LaTeX. To appear in the proceedings of the Eleventh Marcel
Grossmann Meeting on General Relativity, July 23-29, 2006, Freie Universitaet
Berlin, Berlin, Germany (http://www.icra.it/mg/mg11) | null | 10.1142/9789812834300_0528 | null | gr-qc | null | We review some applications of relativistic shells that are relevant in the
context of quantum gravity/quantum cosmology. Using a recently developed
approach, the stationary states of this general relativistic system can be
determined in the semiclassical approximation. We suggest that this technique
might be of phen... | [
{
"created": "Mon, 15 Jan 2007 16:17:29 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Ansoldi",
"Stefano",
""
]
] | We review some applications of relativistic shells that are relevant in the context of quantum gravity/quantum cosmology. Using a recently developed approach, the stationary states of this general relativistic system can be determined in the semiclassical approximation. We suggest that this technique might be of phenom... |
2210.11325 | Jaydeep Singh | Jaydeep Singh | A construction of approximately self-similar naked singularities for the
spherically symmetric Einstein-scalar field system | v2: Typos fixed, references added. 88 pages, 12 Figures. Comments are
welcome | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the stability and instability properties of a
class of naked singularity spacetimes. The first rigorous study of naked
singularity formation in the spherically symmetric Einstein-scalar field system
was due to Christodoulou, who constructed a family $(\overline{g}_k,
\overline{\phi}_k)$ of... | [
{
"created": "Thu, 20 Oct 2022 15:01:23 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Dec 2022 15:14:32 GMT",
"version": "v2"
}
] | 2022-12-09 | [
[
"Singh",
"Jaydeep",
""
]
] | In this work we investigate the stability and instability properties of a class of naked singularity spacetimes. The first rigorous study of naked singularity formation in the spherically symmetric Einstein-scalar field system was due to Christodoulou, who constructed a family $(\overline{g}_k, \overline{\phi}_k)$ of $... |
1706.05115 | Shinji Tsujikawa | Lavinia Heisenberg, Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa | Black holes in vector-tensor theories | 28 pages, 4 figures | null | 10.1088/1475-7516/2017/08/024 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static and spherically symmetric black hole (BH) solutions in
second-order generalized Proca theories with nonminimal vector field derivative
couplings to the Ricci scalar, the Einstein tensor, and the double dual Riemann
tensor. We find concrete Lagrangians which give rise to exact BH solutions by
imposing ... | [
{
"created": "Thu, 15 Jun 2017 23:43:46 GMT",
"version": "v1"
}
] | 2017-08-30 | [
[
"Heisenberg",
"Lavinia",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | We study static and spherically symmetric black hole (BH) solutions in second-order generalized Proca theories with nonminimal vector field derivative couplings to the Ricci scalar, the Einstein tensor, and the double dual Riemann tensor. We find concrete Lagrangians which give rise to exact BH solutions by imposing tw... |
2209.00719 | Hossein Shojaie | Samaneh Oghbaiee, Nafiseh Rahmanpour, Hossein Shojaie | A spherically symmetric gravitational solution of nearly conformally
flat metric~measure~space | 12 pages | Physics of the Dark Universe 40C (2023) 101196 | 10.1016/j.dark.2023.101196 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we study the nearly flat approximation of a conformally
invariant gravitational theory in metric measure space (MMS). In addition, we
investigate the transformation of the energy-momentum tensor in this context
and obtain the vacuum solution of MMS and its weak field limit in the
spherically symme... | [
{
"created": "Thu, 1 Sep 2022 20:46:48 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Feb 2023 10:41:19 GMT",
"version": "v2"
}
] | 2023-02-28 | [
[
"Oghbaiee",
"Samaneh",
""
],
[
"Rahmanpour",
"Nafiseh",
""
],
[
"Shojaie",
"Hossein",
""
]
] | In this manuscript, we study the nearly flat approximation of a conformally invariant gravitational theory in metric measure space (MMS). In addition, we investigate the transformation of the energy-momentum tensor in this context and obtain the vacuum solution of MMS and its weak field limit in the spherically symmetr... |
1811.05049 | Tomohiro Nakama | Tomohiro Nakama and Jun'ichi Yokoyama | Micro black holes formed in the early Universe and their cosmological
implications | 6 pages | Phys. Rev. D 99, 061303 (2019) | 10.1103/PhysRevD.99.061303 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | High energy collisions of particles may have created tiny black holes in the
early Universe, which might leave stable remnants instead of fully evaporating
as a result of Hawking radiation. If the reheating temperature was sufficiently
close to the fundamental gravity scale, which can be different from the usual
Plan... | [
{
"created": "Mon, 12 Nov 2018 23:55:25 GMT",
"version": "v1"
}
] | 2019-04-03 | [
[
"Nakama",
"Tomohiro",
""
],
[
"Yokoyama",
"Jun'ichi",
""
]
] | High energy collisions of particles may have created tiny black holes in the early Universe, which might leave stable remnants instead of fully evaporating as a result of Hawking radiation. If the reheating temperature was sufficiently close to the fundamental gravity scale, which can be different from the usual Planck... |
gr-qc/0512136 | Peter C. Aichelburg | Peter C. Aichelburg, Piotr Bizon and Zbislaw Tabor | Bifurcation and fine structure phenomena in critical collapse of a
self-gravitating $\sigma$-field | null | Class.Quant.Grav. 23 (2006) S299-S306 | 10.1088/0264-9381/23/16/S01 | null | gr-qc | null | Building on previous work on the critical behavior in gravitational collapse
of the self-gravitating SU(2) $\sigma$-field and using high precision numerical
methods we uncover a fine structure hidden in a narrow window of parameter
space. We argue that this numerical finding has a natural explanation within a
dynamic... | [
{
"created": "Thu, 22 Dec 2005 16:16:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Aichelburg",
"Peter C.",
""
],
[
"Bizon",
"Piotr",
""
],
[
"Tabor",
"Zbislaw",
""
]
] | Building on previous work on the critical behavior in gravitational collapse of the self-gravitating SU(2) $\sigma$-field and using high precision numerical methods we uncover a fine structure hidden in a narrow window of parameter space. We argue that this numerical finding has a natural explanation within a dynamical... |
1108.5869 | Abhik Kumar Sanyal Dr. | Abhik Kumar Sanyal, Subhra Debnath and Soumendranath Ruz | Canonical formulation of curvature squared action in the presence of
lapse function | 24 pages, no figure | Class. Quantum Grav. 29 (2012) 215007 | 10.1088/0264-9381/29/21/215007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lapse function appears as Lagrange multiplier in Einstein-Hilbert action and
its variation leads to the (0 0) equation of Einstein, which corresponds to the
Hamiltonian constraint equation. In higher order theory of gravity the
situation is not that simple. Here, we take up the curvature squared (R^2)
action being su... | [
{
"created": "Tue, 30 Aug 2011 08:23:20 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Oct 2012 06:40:39 GMT",
"version": "v2"
}
] | 2012-10-09 | [
[
"Sanyal",
"Abhik Kumar",
""
],
[
"Debnath",
"Subhra",
""
],
[
"Ruz",
"Soumendranath",
""
]
] | Lapse function appears as Lagrange multiplier in Einstein-Hilbert action and its variation leads to the (0 0) equation of Einstein, which corresponds to the Hamiltonian constraint equation. In higher order theory of gravity the situation is not that simple. Here, we take up the curvature squared (R^2) action being supp... |
0803.4366 | Nikodem Poplawski | Nikodem J. Poplawski | Variational formulation of Eisenhart's unified theory | 7 pages; published version | Int.J.Mod.Phys.A24 (2009) 3975-3984 | 10.1142/S0217751X09044735 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Eisenhart's classical unified field theory is based on a non-Riemannian
affine connection related to the covariant derivative of the electromagnetic
field tensor. The sourceless field equations of this theory arise from
vanishing of the torsion trace and the symmetrized Ricci tensor. We formulate
Eisenhart's theory f... | [
{
"created": "Mon, 31 Mar 2008 04:12:05 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Aug 2009 18:12:00 GMT",
"version": "v2"
}
] | 2009-08-30 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | Eisenhart's classical unified field theory is based on a non-Riemannian affine connection related to the covariant derivative of the electromagnetic field tensor. The sourceless field equations of this theory arise from vanishing of the torsion trace and the symmetrized Ricci tensor. We formulate Eisenhart's theory fro... |
gr-qc/0009046 | Luis O. Pimentel | Luis O. Pimentel | Bianchi I Quantum cosmology in the Bergmann-Wagoner theory | 12 pages, Latex file | Gen.Rel.Grav. 33 (2001) 781-790 | 10.1023/A:1010247606118 | null | gr-qc | null | The Wheeler-DeWitt equation is considered in the context of generalized
scalar-tensor theories of gravitation for Bianchi type I cosmology. Exact
solutions are found for two selfinteracting potentials and arbitary coupling
function. The WKB wavefunctions are obtained and a family of solutions
satisfying the Hawking-P... | [
{
"created": "Wed, 13 Sep 2000 18:25:37 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Pimentel",
"Luis O.",
""
]
] | The Wheeler-DeWitt equation is considered in the context of generalized scalar-tensor theories of gravitation for Bianchi type I cosmology. Exact solutions are found for two selfinteracting potentials and arbitary coupling function. The WKB wavefunctions are obtained and a family of solutions satisfying the Hawking-Pag... |
1307.5987 | Holger M\"uller | Michael Hohensee and Holger Mueller | Terrestrial vs. spaceborne, quantum vs. classical tests of the
equivalence principle | Four pages for the proceedings of the sixth meeting on CPT and
Lorentz symmetry | null | 10.1142/9789814566438_0016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equivalence principle can be tested by precision experiments based on
classical and quantum systems, on the ground as well as in space. In many
models, these tests are mostly equivalent in their ability to constrain physics
beyond the Standard Model. We mention differences that nevertheless exist
between spacebor... | [
{
"created": "Tue, 23 Jul 2013 09:13:37 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Hohensee",
"Michael",
""
],
[
"Mueller",
"Holger",
""
]
] | The equivalence principle can be tested by precision experiments based on classical and quantum systems, on the ground as well as in space. In many models, these tests are mostly equivalent in their ability to constrain physics beyond the Standard Model. We mention differences that nevertheless exist between spaceborne... |
gr-qc/9903076 | Roberto De Pietri | R. De Pietri | Canonical ``Loop'' Quantum Gravity and Spin Foam Models | 17 pages, LaTeX2e, 7 figures. To appear in the proceeding of the
XXIII SIGRAV conference, Monopoli (ITALY), September 21st-25th, 1998. Minor
corrections | "Recent Developments in General Relativity " (Springer-Verlag,
Milano, 2000), page 43 | null | null | gr-qc | null | The canonical ``loop'' formulation of quantum gravity is a mathematically
well defined, background independent, non perturbative standard quantization of
Einstein's theory of General Relativity. Some among the most meaningful results
of the theory are: 1) the complete calculation of the spectrum of geometric
quantiti... | [
{
"created": "Fri, 19 Mar 1999 16:24:19 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Apr 1999 20:33:56 GMT",
"version": "v2"
}
] | 2012-06-12 | [
[
"De Pietri",
"R.",
""
]
] | The canonical ``loop'' formulation of quantum gravity is a mathematically well defined, background independent, non perturbative standard quantization of Einstein's theory of General Relativity. Some among the most meaningful results of the theory are: 1) the complete calculation of the spectrum of geometric quantities... |
gr-qc/0701038 | Jonathan Thornburg | Jonathan Thornburg, Peter Diener, Denis Pollney, Luciano Rezzolla,
Erik Schnetter, Ed Seidel, and Ryoji Takahashi | Are moving punctures equivalent to moving black holes? | 4 pages, 3 eps color figures; v2 = major revisions to introduction &
conclusions based on referee comments, but no change in analysis or results | Class.Quant.Grav.24:3911-3918,2007 | 10.1088/0264-9381/24/15/009 | null | gr-qc | null | When simulating the inspiral and coalescence of a binary black-hole system,
special care needs to be taken in handling the singularities. Two main
techniques are used in numerical-relativity simulations: A first and more
traditional one ``excises'' a spatial neighbourhood of the singularity from the
numerical grid on... | [
{
"created": "Fri, 5 Jan 2007 19:46:41 GMT",
"version": "v1"
},
{
"created": "Fri, 11 May 2007 14:12:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Thornburg",
"Jonathan",
""
],
[
"Diener",
"Peter",
""
],
[
"Pollney",
"Denis",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Seidel",
"Ed",
""
],
[
"Takahashi",
"Ryoji",
""
]
] | When simulating the inspiral and coalescence of a binary black-hole system, special care needs to be taken in handling the singularities. Two main techniques are used in numerical-relativity simulations: A first and more traditional one ``excises'' a spatial neighbourhood of the singularity from the numerical grid on e... |
gr-qc/0504086 | Clifford M. Will | Clifford M. Will | Was Einstein Right? Testing Relativity at the Centenary | 21 pages, 3 figures, to be published in "100 Years of Relativity:
Spacetime Structure - Einstein and Beyond", ed. Abhay Ashtekar (World
Scientific, Singapore) | Annalen Phys.15:19-33,2005 | 10.1002/andp.200510170 | null | gr-qc | null | We review the experimental evidence for Einstein's special and general
relativity. A variety of high precision null experiments verify the weak
equivalence principle and local Lorentz invariance, while gravitational
redshift and other clock experiments support local position invariance.
Together these results confirm... | [
{
"created": "Tue, 19 Apr 2005 16:20:55 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Will",
"Clifford M.",
""
]
] | We review the experimental evidence for Einstein's special and general relativity. A variety of high precision null experiments verify the weak equivalence principle and local Lorentz invariance, while gravitational redshift and other clock experiments support local position invariance. Together these results confirm t... |
2102.12695 | Brendan Keith | Brendan Keith, Akshay Khadse, Scott E. Field | Learning orbital dynamics of binary black hole systems from
gravitational wave measurements | null | Phy. Rev. Res. 3, 043101 (2021) | 10.1103/PhysRevResearch.3.043101 | null | gr-qc cs.LG math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a gravitational waveform inversion strategy that discovers
mechanical models of binary black hole (BBH) systems. We show that only a
single time series of (possibly noisy) waveform data is necessary to construct
the equations of motion for a BBH system. Starting with a class of universal
differential equ... | [
{
"created": "Thu, 25 Feb 2021 05:46:14 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Oct 2021 17:21:17 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Nov 2021 02:10:12 GMT",
"version": "v3"
}
] | 2021-11-10 | [
[
"Keith",
"Brendan",
""
],
[
"Khadse",
"Akshay",
""
],
[
"Field",
"Scott E.",
""
]
] | We introduce a gravitational waveform inversion strategy that discovers mechanical models of binary black hole (BBH) systems. We show that only a single time series of (possibly noisy) waveform data is necessary to construct the equations of motion for a BBH system. Starting with a class of universal differential equat... |
1004.3959 | Carlos A. R. Herdeiro | Carlos Herdeiro, Eugen Radu, Carmen Rebelo | Thermodynamical description of stationary, asymptotically flat solutions
with conical singularities | 19 pages, 12 figures | Phys.Rev.D81:104031,2010 | 10.1103/PhysRevD.81.104031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the thermodynamical properties of a number of asymptotically flat,
stationary (but not static) solutions having conical singularities, with both
connected and non-connected event horizons, using the thermodynamical
description recently proposed in arXiv:0912.3386 [gr-qc]. The examples
considered are the do... | [
{
"created": "Thu, 22 Apr 2010 16:41:18 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Herdeiro",
"Carlos",
""
],
[
"Radu",
"Eugen",
""
],
[
"Rebelo",
"Carmen",
""
]
] | We examine the thermodynamical properties of a number of asymptotically flat, stationary (but not static) solutions having conical singularities, with both connected and non-connected event horizons, using the thermodynamical description recently proposed in arXiv:0912.3386 [gr-qc]. The examples considered are the doub... |
1205.3487 | Abhishek Majhi | Abhishek Majhi | The Microcanonical Entropy of Quantum Isolated Horizon, `quantum hair'
$N$ and the Barbero-Immirzi parameter fixation | 9 pages, 2 figures, drastically modified version, arguments are far
more strengthened, an error in the calculation has been rectified which has
affected the final result, accepted for publication in Classical and Quantum
Gravity | Class. Quantum Grav. 31 (2014) 095002 | 10.1088/0264-9381/31/9/095002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | {\it If} the total number of punctures($N$) of a quantum isolated horizon is
considered to be a macroscopic parameter alongside the Chern-Simons level($k$)
or equivalently classical area$(A_{cl})$ a strict analysis of the {\it
microcanonical} ensemble reveals that the {\it microcanonical} entropy has the
form $S_{MC}... | [
{
"created": "Tue, 15 May 2012 19:55:40 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Aug 2012 15:05:08 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Mar 2014 13:53:29 GMT",
"version": "v3"
}
] | 2014-04-10 | [
[
"Majhi",
"Abhishek",
""
]
] | {\it If} the total number of punctures($N$) of a quantum isolated horizon is considered to be a macroscopic parameter alongside the Chern-Simons level($k$) or equivalently classical area$(A_{cl})$ a strict analysis of the {\it microcanonical} ensemble reveals that the {\it microcanonical} entropy has the form $S_{MC}=A... |
2206.08466 | Maxence Corman | Maxence Corman, William E. East, Justin L. Ripley | Evolution of black holes through a nonsingular cosmological bounce | 34 pages, 13 figures, changed to match JCAP version | JCAP09(2022)063 | 10.1088/1475-7516/2022/09/063 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the classical dynamics of black holes during a nonsingular
cosmological bounce. Taking a simple model of a nonsingular bouncing cosmology
driven by the combination of a ghost and ordinary scalar field, we use
nonlinear evolutions of the Einstein equations to follow rotating and
non-rotating black holes of di... | [
{
"created": "Thu, 16 Jun 2022 22:07:22 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2022 00:17:31 GMT",
"version": "v2"
}
] | 2022-10-03 | [
[
"Corman",
"Maxence",
""
],
[
"East",
"William E.",
""
],
[
"Ripley",
"Justin L.",
""
]
] | We study the classical dynamics of black holes during a nonsingular cosmological bounce. Taking a simple model of a nonsingular bouncing cosmology driven by the combination of a ghost and ordinary scalar field, we use nonlinear evolutions of the Einstein equations to follow rotating and non-rotating black holes of diff... |
2211.13056 | Gerardo Garc\'ia-Moreno | Adri\`a Delhom, Gerardo Garc\'ia-Moreno, Manuel Hohmann, Alejandro
Jim\'enez-Cano and Tomi S. Koivisto | Bootstrapping gravity and its extension to metric-affine theories | 32 pages, no figures, no tables; v2: Matches the published version.
Some discussions are expanded and references added | JCAP 12 (2023) 006 | 10.1088/1475-7516/2023/12/006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study diffeomorphism-invariant metric-affine theories of
gravity from the point of view of self-interacting field theories on top of
Minkowski spacetime (or other background). We revise how standard metric
theories couple to their own energy-momentum tensor, and discuss the
generalization of these ide... | [
{
"created": "Wed, 23 Nov 2022 15:53:09 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2023 09:32:07 GMT",
"version": "v2"
}
] | 2023-12-12 | [
[
"Delhom",
"Adrià",
""
],
[
"García-Moreno",
"Gerardo",
""
],
[
"Hohmann",
"Manuel",
""
],
[
"Jiménez-Cano",
"Alejandro",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | In this work we study diffeomorphism-invariant metric-affine theories of gravity from the point of view of self-interacting field theories on top of Minkowski spacetime (or other background). We revise how standard metric theories couple to their own energy-momentum tensor, and discuss the generalization of these ideas... |
gr-qc/0407054 | F. S. Guzman | F. Siddhartha Guzman | Evolving spherical boson stars on a 3D cartesian grid | 12 pages, 13 figures. To appear in Phys. Rev. D | Phys.Rev. D70 (2004) 044033 | 10.1103/PhysRevD.70.044033 | null | gr-qc | null | A code to evolve boson stars in 3D is presented as the starting point for the
evolution of scalar field systems with arbitrary symmetries. It was possible to
reproduce the known results related to perturbations discovered with 1D
numerical codes in the past, which include evolution of stable and unstable
equilibrium ... | [
{
"created": "Wed, 14 Jul 2004 19:17:17 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Guzman",
"F. Siddhartha",
""
]
] | A code to evolve boson stars in 3D is presented as the starting point for the evolution of scalar field systems with arbitrary symmetries. It was possible to reproduce the known results related to perturbations discovered with 1D numerical codes in the past, which include evolution of stable and unstable equilibrium co... |
gr-qc/0204003 | Sawa Manoff | Sawa Manoff | Mechanics of Continuous Media in $(\bar{L}_{n},g)$-Spaces. III. Relative
Accelerations | 23 pages, LaTeX | null | null | null | gr-qc | null | Basic notions of continuous media mechanics are introduced for spaces with
affine connections and metrics. The physical interpretation of the notion of
relative acceleration is discussed. The notions of deformation acceleration,
shear acceleration, rotation (vortex) acceleration, and expansion acceleration
are introd... | [
{
"created": "Mon, 1 Apr 2002 11:04:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Manoff",
"Sawa",
""
]
] | Basic notions of continuous media mechanics are introduced for spaces with affine connections and metrics. The physical interpretation of the notion of relative acceleration is discussed. The notions of deformation acceleration, shear acceleration, rotation (vortex) acceleration, and expansion acceleration are introduc... |
2211.01362 | Philippa Cole | Philippa S. Cole, Gianfranco Bertone, Adam Coogan, Daniele Gaggero,
Theophanes Karydas, Bradley J. Kavanagh, Thomas F. M. Spieksma and Giovanni
Maria Tomaselli | Disks, spikes, and clouds: distinguishing environmental effects on BBH
gravitational waveforms | 8 pages, 4 figures, 2 tables plus appendices | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Future gravitational wave interferometers such as LISA, Taiji, DECIGO, and
TianQin, will enable precision studies of the environment surrounding black
holes. In this paper, we study intermediate and extreme mass ratio binary black
hole inspirals, and consider three possible environments surrounding the
primary black ... | [
{
"created": "Wed, 2 Nov 2022 17:58:24 GMT",
"version": "v1"
}
] | 2022-11-03 | [
[
"Cole",
"Philippa S.",
""
],
[
"Bertone",
"Gianfranco",
""
],
[
"Coogan",
"Adam",
""
],
[
"Gaggero",
"Daniele",
""
],
[
"Karydas",
"Theophanes",
""
],
[
"Kavanagh",
"Bradley J.",
""
],
[
"Spieksma",
"Thomas F. ... | Future gravitational wave interferometers such as LISA, Taiji, DECIGO, and TianQin, will enable precision studies of the environment surrounding black holes. In this paper, we study intermediate and extreme mass ratio binary black hole inspirals, and consider three possible environments surrounding the primary black ho... |
gr-qc/0210072 | Boris Grobov | Alexander K. Gouts | The theory of Multiverse, multiplicity of physical objects and physical
constants | 10 pages, LaTeX, report on 11-th International (Russian)
Gravitational Conference at Tomsk. July 1-7, 2002 | Grav.Cosmol. 9 (2003) 33-36 | null | null | gr-qc | null | The Multiverse is collection of parallel universes. In this article a formal
theory and a topos-theoretic models of the multiverse are given. For this the
Lawvere-Kock Synthetic Differential Geometry and topos models for smooth
infinitesimal analysis are used. Physical properties of multi-variant and
many-dimensional... | [
{
"created": "Tue, 22 Oct 2002 07:45:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gouts",
"Alexander K.",
""
]
] | The Multiverse is collection of parallel universes. In this article a formal theory and a topos-theoretic models of the multiverse are given. For this the Lawvere-Kock Synthetic Differential Geometry and topos models for smooth infinitesimal analysis are used. Physical properties of multi-variant and many-dimensional p... |
1112.1781 | Hanno Sahlmann | Hanno Sahlmann | New insights in quantum geometry | 10 pages, 3 figures; Proceedings of Loops'11, Madrid, submitted to
Journal of Physics: Conference Series (JPCS) | null | 10.1088/1742-6596/360/1/012007 | APCTP Pre2011 - 014 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum geometry, i.e., the quantum theory of intrinsic and extrinsic spatial
geometry, is a cornerstone of loop quantum gravity. Recently, there have been
many new ideas in this field, and I will review some of them. In particular,
after a brief description of the main structures and results of quantum
geometry, I r... | [
{
"created": "Thu, 8 Dec 2011 08:46:33 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Sahlmann",
"Hanno",
""
]
] | Quantum geometry, i.e., the quantum theory of intrinsic and extrinsic spatial geometry, is a cornerstone of loop quantum gravity. Recently, there have been many new ideas in this field, and I will review some of them. In particular, after a brief description of the main structures and results of quantum geometry, I rev... |
0911.5004 | T. Padmanabhan | T.Padmanabhan | Thermodynamical Aspects of Gravity: New insights | 85 pages; 5 figures; Invited Review to appear in Reports on Progress
in Physics | Rep. Prog. Phys. 73 (2010) 046901 | 10.1088/0034-4885/73/4/046901 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fact that one can associate thermodynamic properties with horizons brings
together principles of quantum theory, gravitation and thermodynamics and
possibly offers a window to the nature of quantum geometry. This review
discusses certain aspects of this topic concentrating on new insights gained
from some recent ... | [
{
"created": "Thu, 26 Nov 2009 03:39:55 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jan 2010 17:55:15 GMT",
"version": "v2"
}
] | 2015-05-14 | [
[
"Padmanabhan",
"T.",
""
]
] | The fact that one can associate thermodynamic properties with horizons brings together principles of quantum theory, gravitation and thermodynamics and possibly offers a window to the nature of quantum geometry. This review discusses certain aspects of this topic concentrating on new insights gained from some recent wo... |
1707.08851 | Felipe Faria | F. F. Faria | Probing the unitarity of the renormalizable theory of massive conformal
gravity | 8 pages; v2: 9 pages; v3: 9 pages, e-mail and typos corrected in Eq.
(39), match the published version | Eur. Phys. J. C (2018) 78:277 | 10.1140/epjc/s10052-018-5762-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presence of an unstable massive spin-2 ghost state in the renormalizable
theory of massive conformal gravity leads to a pair of complex poles appearing
in the first sheet of the energy plane. Here we show that the positions of
these poles are gauge dependent, which makes the theory unitary.
| [
{
"created": "Thu, 27 Jul 2017 13:12:18 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Apr 2018 12:55:47 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Apr 2018 16:20:40 GMT",
"version": "v3"
}
] | 2022-10-19 | [
[
"Faria",
"F. F.",
""
]
] | The presence of an unstable massive spin-2 ghost state in the renormalizable theory of massive conformal gravity leads to a pair of complex poles appearing in the first sheet of the energy plane. Here we show that the positions of these poles are gauge dependent, which makes the theory unitary. |
0706.3238 | Hamilton | A. J. S. Hamilton (JILA, U. Colorado) | Perturbation theory of spherically symmetric self-similar black holes | 63 pages, 1 eps figure | null | null | null | gr-qc astro-ph | null | The theory of perturbations of spherically symmetric self-similar black holes
is presented, in the Newman-Penrose formalism. It is shown that the wave
equations for gravitational, electromagnetic, and scalar waves are separable,
though not decoupled. A generalization of the Teukolsky equation is given.
Monopole and d... | [
{
"created": "Fri, 22 Jun 2007 19:40:33 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jun 2007 20:01:11 GMT",
"version": "v2"
}
] | 2007-06-25 | [
[
"Hamilton",
"A. J. S.",
"",
"JILA, U. Colorado"
]
] | The theory of perturbations of spherically symmetric self-similar black holes is presented, in the Newman-Penrose formalism. It is shown that the wave equations for gravitational, electromagnetic, and scalar waves are separable, though not decoupled. A generalization of the Teukolsky equation is given. Monopole and dip... |
1510.01436 | Chandrachur Chakraborty | Chandrachur Chakraborty (TIFR, India), Oindrila Ganguly, Parthasarathi
Majumdar | Intertial Frame Dragging in an Acoustic Analogue spacetime | LaTex; 6 pages including 1 figure; paper thoroughly revised, accepted
for publication in Annalen der Physik | Ann. Phys. (Berlin) 530 , 1700231 (2018) | 10.1002/andp.201700231 | null | gr-qc cond-mat.other hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report an incipient exploration of the Lense-Thirring precession effect in
a rotating \textit{acoustic analogue black hole} spacetime. An exact formula is
deduced for the precession frequency of a gyroscope due to inertial frame
dragging, close to the ergosphere of a `Draining Bathtub' acoustic spacetime
which has... | [
{
"created": "Tue, 6 Oct 2015 05:47:48 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 2016 05:49:38 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Sep 2017 11:42:21 GMT",
"version": "v3"
}
] | 2018-09-03 | [
[
"Chakraborty",
"Chandrachur",
"",
"TIFR, India"
],
[
"Ganguly",
"Oindrila",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | We report an incipient exploration of the Lense-Thirring precession effect in a rotating \textit{acoustic analogue black hole} spacetime. An exact formula is deduced for the precession frequency of a gyroscope due to inertial frame dragging, close to the ergosphere of a `Draining Bathtub' acoustic spacetime which has b... |
2004.05869 | Alexander Pavlov E | Alexander E. Pavlov | Hamiltonian equations of reduced conformal geometrodynamics in extrinsic
time | 8 pages | null | 10.1134/S0202289320030111 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The reduced vacuum Hamiltonian equations of conformal geometrodynamics of
compact manifolds in extrinsic time are written. This is achieved by
generalizing the theorem of implicit function derivative to the functional
analysis.
| [
{
"created": "Mon, 13 Apr 2020 11:20:17 GMT",
"version": "v1"
}
] | 2020-10-14 | [
[
"Pavlov",
"Alexander E.",
""
]
] | The reduced vacuum Hamiltonian equations of conformal geometrodynamics of compact manifolds in extrinsic time are written. This is achieved by generalizing the theorem of implicit function derivative to the functional analysis. |
0808.2174 | Ian Morrison | Donald Marolf, Ian A. Morrison | Group Averaging of massless scalar fields in 1+1 de Sitter | 14 pages, accepted to Classical and Quantum Gravity | Class.Quant.Grav.26:035001,2009 | 10.1088/0264-9381/26/3/035001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative gravity in global de Sitter space is subject to so-called
linearization stability constraints: If they are to couple consistently to the
gravitational field, quantum states must be invariant under the de Sitter
isometries. While standard Fock spaces contain no de Sitter-invariant states
apart from (possi... | [
{
"created": "Fri, 15 Aug 2008 18:00:54 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Oct 2008 18:45:54 GMT",
"version": "v2"
}
] | 2009-01-16 | [
[
"Marolf",
"Donald",
""
],
[
"Morrison",
"Ian A.",
""
]
] | Perturbative gravity in global de Sitter space is subject to so-called linearization stability constraints: If they are to couple consistently to the gravitational field, quantum states must be invariant under the de Sitter isometries. While standard Fock spaces contain no de Sitter-invariant states apart from (possibl... |
1204.5938 | Jos\'e Antonio Belinch\'on | O. Cornejo-P\'erez, J. A. Belinch\'on | Exact solutions of a Flat Full Causal Bulk viscous FRW cosmological
model through factorization | 18 pas. RevTeX4. New solutions. arXiv admin note: text overlap with
arXiv:gr-qc/0107004 by other authors | International Journal of Modern Physics D, Vol. 22, No. 6 (2013)
1350031 | 10.1142/S0218271813500314 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the classical flat full causal bulk viscous FRW cosmological model
through the factorization method. The method shows that there exists a
relationship between the viscosity parameter $s$ and the parameter $\gamma$
entering the equations of state of the model. Also, the factorization method
allows to find som... | [
{
"created": "Wed, 25 Apr 2012 15:30:12 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jan 2013 07:31:34 GMT",
"version": "v2"
}
] | 2013-04-05 | [
[
"Cornejo-Pérez",
"O.",
""
],
[
"Belinchón",
"J. A.",
""
]
] | We study the classical flat full causal bulk viscous FRW cosmological model through the factorization method. The method shows that there exists a relationship between the viscosity parameter $s$ and the parameter $\gamma$ entering the equations of state of the model. Also, the factorization method allows to find some ... |
2112.04092 | Jen-Tsung Hsiang | Jen-Tsung Hsiang and Bei-Lok Hu | No intrinsic decoherence of inflationary cosmological perturbations | 55 pages, 5 figures | Universe 8, 27 (2022) | 10.3390/universe8010027 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a brief summary of decoherence and quantum to classical transition in
cosmology we focus on the study of quantum decoherence of cosmological
perturbations in inflationary universe, that does not rely on any environment.
This is what `intrinsic' in the title refers to -- a closed quantum system. The
question is,... | [
{
"created": "Wed, 8 Dec 2021 03:28:13 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2022 03:54:18 GMT",
"version": "v2"
}
] | 2022-01-11 | [
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Hu",
"Bei-Lok",
""
]
] | After a brief summary of decoherence and quantum to classical transition in cosmology we focus on the study of quantum decoherence of cosmological perturbations in inflationary universe, that does not rely on any environment. This is what `intrinsic' in the title refers to -- a closed quantum system. The question is, d... |
1106.5184 | Frans Pretorius | Luis Lehner and Frans Pretorius | Final State of Gregory-Laflamme Instability | 27 pages, 6 Figures. Chapter of the book `Black Holes in Higher
Dimensions' to be published by Cambridge University Press (editor: G.
Horowitz) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the behavior of a perturbed 5-dimensional black string subject to
the Gregory-Laflamme instability. We show that the horizon evolves in a
self-similar manner, where at any moment in the late-time development of the
instability the horizon can be described as a sequence of 3-dimensional
spherical black hol... | [
{
"created": "Sun, 26 Jun 2011 02:54:36 GMT",
"version": "v1"
}
] | 2011-06-28 | [
[
"Lehner",
"Luis",
""
],
[
"Pretorius",
"Frans",
""
]
] | We describe the behavior of a perturbed 5-dimensional black string subject to the Gregory-Laflamme instability. We show that the horizon evolves in a self-similar manner, where at any moment in the late-time development of the instability the horizon can be described as a sequence of 3-dimensional spherical black holes... |
2310.08638 | Alexandre M. Pombo | Alexandre M. Pombo and Daniela D. Doneva | Effects of mass and self-interaction on nonlinear scalarization of
scalar-Gauss-Bonnet black holes | 18 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently found that in certain flavours of scalar-Gauss-Bonnet gravity
linearly stable bald black holes can co-exist with stable scalarized solutions.
The transition between both can be ignited by a large nonlinear perturbation,
thus the process was dubbed non-linear scalarization, and it happens with a
jump t... | [
{
"created": "Thu, 12 Oct 2023 18:02:23 GMT",
"version": "v1"
}
] | 2023-10-16 | [
[
"Pombo",
"Alexandre M.",
""
],
[
"Doneva",
"Daniela D.",
""
]
] | It was recently found that in certain flavours of scalar-Gauss-Bonnet gravity linearly stable bald black holes can co-exist with stable scalarized solutions. The transition between both can be ignited by a large nonlinear perturbation, thus the process was dubbed non-linear scalarization, and it happens with a jump tha... |
gr-qc/0609050 | Stefano Ansoldi | Stefano Ansoldi and Eduardo I. Guendelman | Solitons as Key Parts to Produce a Universe in the Laboratory | Based on a talk given at the 2006 Biennial Meeting of the
International Association for Relativistic Dynamics (IARD06). 11 pages, LaTeX | Found.Phys.37:712-722,2007 | 10.1007/s10701-007-9113-0 | null | gr-qc | null | Cosmology is usually understood as an observational science, where
experimentation plays no role. It is interesting, nevertheless, to change this
perspective addressing the following question: what should we do to create a
universe, in a laboratory? It appears, in fact, that this is, in principle,
possible according ... | [
{
"created": "Thu, 14 Sep 2006 11:41:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ansoldi",
"Stefano",
""
],
[
"Guendelman",
"Eduardo I.",
""
]
] | Cosmology is usually understood as an observational science, where experimentation plays no role. It is interesting, nevertheless, to change this perspective addressing the following question: what should we do to create a universe, in a laboratory? It appears, in fact, that this is, in principle, possible according to... |
2003.01045 | Pedro Fernandes | Pedro G. S. Fernandes | Einstein-Maxwell-scalar black holes with massive and self-interacting
scalar hair | 15 pages, 10 figures; V2: references and extra discussion added; V3:
extra discussion added, including thorough radial stability analysis.
Accepted for publication in Physics of the Dark Universe. arXiv admin note:
text overlap with arXiv:1908.00037 | Phys.Dark Univ. 30, 100716 (2020) | 10.1016/j.dark.2020.100716 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, spontaneous scalarization of charged black holes has attracted a
great deal of attention and motivated several studies of
Einstein-Maxwell-scalar models. These studies have, however, only considered a
massless and non-self-interacting scalar field. In this work a more realistic
treatment of the problem is c... | [
{
"created": "Mon, 2 Mar 2020 17:23:40 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2020 15:53:47 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Sep 2020 17:33:19 GMT",
"version": "v3"
}
] | 2020-09-09 | [
[
"Fernandes",
"Pedro G. S.",
""
]
] | Recently, spontaneous scalarization of charged black holes has attracted a great deal of attention and motivated several studies of Einstein-Maxwell-scalar models. These studies have, however, only considered a massless and non-self-interacting scalar field. In this work a more realistic treatment of the problem is con... |
1805.03053 | J. A. de Freitas Pacheco | Jos\'e Antonio de Freitas Pacheco | Primordial Regular Black Holes: Thermodynamics and Dark Matter | 16 pages, 4 figures | Universe 4, 62, 2018 - special issue: Black hole thermodynamics | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The possibility that dark matter particles could be constituted by extreme
regular primordial black holes is discussed. Extreme black holes have zero
surface temperature, and are not subjected to the Hawking evaporation process.
Assuming that the common horizon radius of these black holes is fixed by the
minimum dist... | [
{
"created": "Sat, 5 May 2018 12:12:59 GMT",
"version": "v1"
}
] | 2018-05-14 | [
[
"Pacheco",
"José Antonio de Freitas",
""
]
] | The possibility that dark matter particles could be constituted by extreme regular primordial black holes is discussed. Extreme black holes have zero surface temperature, and are not subjected to the Hawking evaporation process. Assuming that the common horizon radius of these black holes is fixed by the minimum distan... |
2203.16216 | Blagoje Oblak | Ali Seraj, Blagoje Oblak | The Precession Caused by Gravitational Waves | 6 pages, 3 figures. Short version of the long paper
arXiv:2112.04535[hep-th]. v2: Minor typos fixed, published in PRL | null | 10.1103/PhysRevLett.129.061101 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We show that gravitational waves cause freely falling gyroscopes to precess
relative to fixed distant stars, extending the stationary Lense-Thirring
effect. The precession rate decays as the square of the inverse distance to the
source, and is proportional to a suitable Noether current for dual asymptotic
symmetries ... | [
{
"created": "Wed, 30 Mar 2022 11:37:04 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Aug 2022 13:36:10 GMT",
"version": "v2"
}
] | 2022-08-05 | [
[
"Seraj",
"Ali",
""
],
[
"Oblak",
"Blagoje",
""
]
] | We show that gravitational waves cause freely falling gyroscopes to precess relative to fixed distant stars, extending the stationary Lense-Thirring effect. The precession rate decays as the square of the inverse distance to the source, and is proportional to a suitable Noether current for dual asymptotic symmetries at... |
1211.6156 | Phil Threlfall | Philip Threlfall and Susan M. Scott | Conformal Structures Admitted by a Class of FRW Cosmologies | 27 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we demonstrate that there are large classes of
Friedmann-Robertson-Walker (FRW) cosmologies that admit isotropic conformal
structures of Quiescent Cosmology. FRW models have long been known to admit
singularities such as Big Bangs and Big Crunches [1, 2] but recently it has
been shown that there are oth... | [
{
"created": "Mon, 26 Nov 2012 23:03:46 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Dec 2012 23:59:07 GMT",
"version": "v2"
}
] | 2012-12-18 | [
[
"Threlfall",
"Philip",
""
],
[
"Scott",
"Susan M.",
""
]
] | In this paper we demonstrate that there are large classes of Friedmann-Robertson-Walker (FRW) cosmologies that admit isotropic conformal structures of Quiescent Cosmology. FRW models have long been known to admit singularities such as Big Bangs and Big Crunches [1, 2] but recently it has been shown that there are other... |
2312.14516 | Anom Trenggana | Anom Trenggana and Freddy P. Zen | Non-classicality of Primordial Gravitational Waves in Three-mode
Representation Through Quantum Poincare Sphere | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this research, we generalize the transformation of the vacuum state that
generated gravitational waves in the early universe which is usually
transformed using a two-mode into a three-mode Bogoliubov transformation. Based
on the calculation of quantum discord this transformation allows the universe
to be classical... | [
{
"created": "Fri, 22 Dec 2023 08:24:46 GMT",
"version": "v1"
}
] | 2023-12-25 | [
[
"Trenggana",
"Anom",
""
],
[
"Zen",
"Freddy P.",
""
]
] | In this research, we generalize the transformation of the vacuum state that generated gravitational waves in the early universe which is usually transformed using a two-mode into a three-mode Bogoliubov transformation. Based on the calculation of quantum discord this transformation allows the universe to be classical w... |
2407.10602 | Carl Rossdeutscher | Marc Mars, Walter Simon, Roland Steinbauer, Carl Rossdeutscher | Marginally outer trapped tubes in de Sitter spacetime | 15 pages | null | null | null | gr-qc math.DG | http://creativecommons.org/licenses/by/4.0/ | We prove two results which are relevant for constructing marginally outer
trapped tubes (MOTTs) in de Sitter spacetime. The first one holds more
generally, namely for spacetimes satisfying the null convergence condition and
containing a timelike conformal Killing vector with a "temporal function". We
show that all ma... | [
{
"created": "Mon, 15 Jul 2024 10:24:34 GMT",
"version": "v1"
}
] | 2024-07-16 | [
[
"Mars",
"Marc",
""
],
[
"Simon",
"Walter",
""
],
[
"Steinbauer",
"Roland",
""
],
[
"Rossdeutscher",
"Carl",
""
]
] | We prove two results which are relevant for constructing marginally outer trapped tubes (MOTTs) in de Sitter spacetime. The first one holds more generally, namely for spacetimes satisfying the null convergence condition and containing a timelike conformal Killing vector with a "temporal function". We show that all marg... |
1703.02503 | Hossein Safari | A. Gheibi, H. Safari, and D. E. Innes | Magnetoacoustic and Alfve'nic Black Holes with Hawking Radiation at
Horizons Made of Magnephonons and Alphonons | 9 pages, 3 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce analogue black holes (BHs) based on ideal magnetohydrodynamic
equations. Similar to acoustic BHs, which trap phonons and emit Hawking
radiation (HR) at the sonic horizon where the flow speed changes from super- to
sub-sonic, in the horizon of magnetoacoustic and Alfv\'{e}nic BHs, the
magnetoacoustic and ... | [
{
"created": "Tue, 7 Mar 2017 18:15:43 GMT",
"version": "v1"
}
] | 2017-03-08 | [
[
"Gheibi",
"A.",
""
],
[
"Safari",
"H.",
""
],
[
"Innes",
"D. E.",
""
]
] | We introduce analogue black holes (BHs) based on ideal magnetohydrodynamic equations. Similar to acoustic BHs, which trap phonons and emit Hawking radiation (HR) at the sonic horizon where the flow speed changes from super- to sub-sonic, in the horizon of magnetoacoustic and Alfv\'{e}nic BHs, the magnetoacoustic and Al... |
1509.08696 | Akram Sadat Sefiedgar | Akram Sadat Sefiedgar | From the Schwarzschild Anti de Sitter Black Hole to the Conformal Field
Theory | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergence of the quantum gravitational effects in a very high energy
regime necessitates some corrections to the thermodynamics of Black holes. In
this letter, we investigate a possible modification to the thermodynamics of
Schwarzschild anti de Sitter (SAdS) black holes due to rainbow gravity model.
Using the co... | [
{
"created": "Tue, 29 Sep 2015 11:42:15 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Sefiedgar",
"Akram Sadat",
""
]
] | The emergence of the quantum gravitational effects in a very high energy regime necessitates some corrections to the thermodynamics of Black holes. In this letter, we investigate a possible modification to the thermodynamics of Schwarzschild anti de Sitter (SAdS) black holes due to rainbow gravity model. Using the corr... |
1802.02399 | Mahmood Roshan | Nasrin Nari and Mahmood Roshan | Compact stars in Energy-Momentum Squared Gravity | 11 pages, 6 figures, Accepted for publication in PRD | Phys. Rev. D 98, 024031 (2018) | 10.1103/PhysRevD.98.024031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A simple generalization to Einstein's general relativity (GR) was recently
proposed which allows a correction term $T_{\alpha\beta}T^{\alpha\beta}$ in the
action functional of the theory. This theory is called Energy-Momentum Squared
Gravity (EMSG) and introduces a new coupling parameter $\eta$. EMSG resolves
the big... | [
{
"created": "Wed, 7 Feb 2018 12:21:10 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Jun 2018 12:46:20 GMT",
"version": "v2"
}
] | 2018-07-25 | [
[
"Nari",
"Nasrin",
""
],
[
"Roshan",
"Mahmood",
""
]
] | A simple generalization to Einstein's general relativity (GR) was recently proposed which allows a correction term $T_{\alpha\beta}T^{\alpha\beta}$ in the action functional of the theory. This theory is called Energy-Momentum Squared Gravity (EMSG) and introduces a new coupling parameter $\eta$. EMSG resolves the big b... |
1505.00959 | Che-min Shen | Che-Min Shen, Keisuke Izumi and Pisin Chen | The boundary effect of anomaly-induced action | 15 pages, 8 figures | Phys. Rev. D 92, 024035 (2015) | 10.1103/PhysRevD.92.024035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the boundary effect of anomaly-induced action in two-dimensional
spacetime, which is ignored in previous studies. Anomaly-induced action, which
gives the stress tensor with the same trace as the trace anomaly, can be
represented in terms of local operators by introducing an auxiliary scalar
field. Although... | [
{
"created": "Tue, 5 May 2015 11:25:37 GMT",
"version": "v1"
}
] | 2015-07-29 | [
[
"Shen",
"Che-Min",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Chen",
"Pisin",
""
]
] | We discuss the boundary effect of anomaly-induced action in two-dimensional spacetime, which is ignored in previous studies. Anomaly-induced action, which gives the stress tensor with the same trace as the trace anomaly, can be represented in terms of local operators by introducing an auxiliary scalar field. Although t... |
2102.07784 | Vitor Cardoso | Vitor Cardoso, Francisco Duque, Arianna Foschi | The light ring and the appearance of matter accreted by black holes | 11 pages, 10 figures, revtex4. v2: Several improvements, relation
between geometric optics and quasinormal modes clarified. To appear in
Physical Review D | Phys. Rev. D 103, 104044 (2021) | 10.1103/PhysRevD.103.104044 | null | gr-qc astro-ph.HE physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometry of black hole spacetimes can be probed with exquisite precision
in the gravitational-wave window, and possibly also in the optical regime. We
study the accretion of bright spots -- objects which emit strongly in the
optical or in gravitational waves -- by non-spinning black holes. The emission
as the obj... | [
{
"created": "Mon, 15 Feb 2021 19:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Apr 2021 13:52:03 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Cardoso",
"Vitor",
""
],
[
"Duque",
"Francisco",
""
],
[
"Foschi",
"Arianna",
""
]
] | The geometry of black hole spacetimes can be probed with exquisite precision in the gravitational-wave window, and possibly also in the optical regime. We study the accretion of bright spots -- objects which emit strongly in the optical or in gravitational waves -- by non-spinning black holes. The emission as the objec... |
gr-qc/0201066 | Marc Mars | Marc Mars and Jose M.M. Senovilla | Stationary and Axisymmetric Perfect-Fluid Solutions with Conformal
Motion | Latex, no figures | Class.Quant.Grav.11:3049-3068,1994 | 10.1088/0264-9381/11/12/018 | null | gr-qc | null | Stationary and axisymmetric perfect-fluid metrics are studied under the
assumption of the existence of a conformal Killing vector field and in the
general case of differential rotation. The possible Lie algebras for the
conformal group and corresponding canonical line-elements are explicitly given.
It turns out that ... | [
{
"created": "Sun, 20 Jan 2002 17:36:28 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Mars",
"Marc",
""
],
[
"Senovilla",
"Jose M. M.",
""
]
] | Stationary and axisymmetric perfect-fluid metrics are studied under the assumption of the existence of a conformal Killing vector field and in the general case of differential rotation. The possible Lie algebras for the conformal group and corresponding canonical line-elements are explicitly given. It turns out that on... |
gr-qc/0001005 | Takashi Kimura | Koji Ichidayama | One Proposal about the Nature during Our Time and Space | 5 pages, LaTeX | null | null | null | gr-qc | null | It made that the new symmetric property, the binary law, existed newly in our
time and space at the thing except the symmetric property of the principle of
general relativity which is already known in this paper clear. The introduction
of this symmetric property will have made dealing with the position tensor of
us h... | [
{
"created": "Tue, 4 Jan 2000 06:08:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ichidayama",
"Koji",
""
]
] | It made that the new symmetric property, the binary law, existed newly in our time and space at the thing except the symmetric property of the principle of general relativity which is already known in this paper clear. The introduction of this symmetric property will have made dealing with the position tensor of us han... |
2210.02253 | Cong Zhang | Jerzy Lewandowski, Yongge Ma, Jinsong Yang, Cong Zhang | Quantum Oppenheimer-Snyder and Swiss Cheese models | 5+3 pages, 2 figures, revised to adapt the published version | Phys. Rev. Lett. 130, 101501 (2023) | 10.1103/PhysRevLett.130.101501 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | By considering the quantum Oppenheimer-Snyder model in loop quantum
cosmology, a new quantum black hole model whose metric tensor is a suitably
deformed Schwarzschild one is derived. The quantum effects imply a lower bound
on the mass of the black hole produced by the collapsing dust ball. For the
case of larger mass... | [
{
"created": "Wed, 5 Oct 2022 13:31:50 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Oct 2022 12:41:53 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Feb 2023 16:55:27 GMT",
"version": "v3"
}
] | 2023-03-08 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Ma",
"Yongge",
""
],
[
"Yang",
"Jinsong",
""
],
[
"Zhang",
"Cong",
""
]
] | By considering the quantum Oppenheimer-Snyder model in loop quantum cosmology, a new quantum black hole model whose metric tensor is a suitably deformed Schwarzschild one is derived. The quantum effects imply a lower bound on the mass of the black hole produced by the collapsing dust ball. For the case of larger masses... |
1202.6213 | Chandra Mishra | Chandra Kant Mishra | Radial infall of two compact objects: 2.5PN linear momentum flux and
associated recoil | 17 pages, 2 figures | null | 10.1103/PhysRevD.85.104046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The loss rate of linear momentum from a binary system composed of compact
objects (radially falling towards each other under mutual gravitational
influence) has been investigated using the multipolar post-Minkowskian
approach. The 2.5PN accurate analytical formula for the linear momentum flux is
provided, in terms of... | [
{
"created": "Tue, 28 Feb 2012 13:36:14 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Mishra",
"Chandra Kant",
""
]
] | The loss rate of linear momentum from a binary system composed of compact objects (radially falling towards each other under mutual gravitational influence) has been investigated using the multipolar post-Minkowskian approach. The 2.5PN accurate analytical formula for the linear momentum flux is provided, in terms of t... |
2011.01942 | Bence B\'ecsy | Bence B\'ecsy, Neil J. Cornish | Bayesian search for gravitational wave bursts in pulsar timing array
data | 23 pages, 10 figures, matches published version | Bence Becsy and Neil J. Cornish 2021 Class. Quantum Grav. 38
095012 | 10.1088/1361-6382/abf1c6 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nanohertz frequency band explored by pulsar timing arrays provides a
unique discovery space for gravitational wave signals. In addition to signals
from anticipated sources, such as those from supermassive black hole binaries,
some previously unimagined sources may emit transient gravitational waves
(a.k.a. bursts... | [
{
"created": "Tue, 3 Nov 2020 19:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2021 19:34:19 GMT",
"version": "v2"
}
] | 2021-04-16 | [
[
"Bécsy",
"Bence",
""
],
[
"Cornish",
"Neil J.",
""
]
] | The nanohertz frequency band explored by pulsar timing arrays provides a unique discovery space for gravitational wave signals. In addition to signals from anticipated sources, such as those from supermassive black hole binaries, some previously unimagined sources may emit transient gravitational waves (a.k.a. bursts) ... |
1103.5612 | Gideon Koekoek | G. Koekoek, J.W. van Holten | Geodesic deviations: modeling extreme mass-ratio systems and their
gravitational waves | null | Class. Quantum Grav. 28 (2011) 225022 | 10.1088/0264-9381/28/22/225022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The method of geodesic deviations has been applied to derive accurate
analytic approximations to geodesics in Schwarzschild space-time. The results
are used to construct analytic expressions for the source terms in the
Regge-Wheeler and Zerilli-Moncrief equations, which describe the propagation of
gravitational waves... | [
{
"created": "Tue, 29 Mar 2011 12:00:19 GMT",
"version": "v1"
}
] | 2015-11-26 | [
[
"Koekoek",
"G.",
""
],
[
"van Holten",
"J. W.",
""
]
] | The method of geodesic deviations has been applied to derive accurate analytic approximations to geodesics in Schwarzschild space-time. The results are used to construct analytic expressions for the source terms in the Regge-Wheeler and Zerilli-Moncrief equations, which describe the propagation of gravitational waves e... |
gr-qc/0111062 | Hongya Liu | Guowen Peng, Hongya Liu and Qiuyang Zhang | Quantum Effects of an Extra Compact Dimension on the Wave Function of
the Universe | 10 pages, no figures; to appear in Int. J. Theor. Phys. (2002) | Int.J.Theor.Phys. 41 (2002) 1127-1133 | null | null | gr-qc hep-th | null | We extend the direct quantum approach of the standard FRW cosmology from 4D
to 5D and obtain a Hamiltonian formulation for a wave-like 5D FRW cosmology.
Using a late-time approximation we isolate out a y-part from the full wave
function of the 5D Universe. Then we find that the compactness of the fifth
dimension y yi... | [
{
"created": "Tue, 20 Nov 2001 08:31:42 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2002 02:40:48 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Peng",
"Guowen",
""
],
[
"Liu",
"Hongya",
""
],
[
"Zhang",
"Qiuyang",
""
]
] | We extend the direct quantum approach of the standard FRW cosmology from 4D to 5D and obtain a Hamiltonian formulation for a wave-like 5D FRW cosmology. Using a late-time approximation we isolate out a y-part from the full wave function of the 5D Universe. Then we find that the compactness of the fifth dimension y yiel... |
2403.14730 | Hassan Hassanabadi prof. | Hao Chen, Meng-Yao Zhang, Hassan Hassanabadi, Bekir Can
L\"utf\"uo\u{g}lu, Zheng-Wen Long | Topology of dyonic AdS black holes with quasitopological
electromagnetism in Einstein-Gauss-Bonnet gravity | 10 pages, 18 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this study, we employ the thermodynamic topological method to classify
critical points for the dyonic AdS black holes with quasitopological
electromagnetism in the Einstein-Gauss-Bonnet background. To this end, we find
a small/large black hole phase transition in all dimensions of space-time, the
existence of a co... | [
{
"created": "Thu, 21 Mar 2024 03:12:21 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Mar 2024 05:44:32 GMT",
"version": "v2"
}
] | 2024-03-26 | [
[
"Chen",
"Hao",
""
],
[
"Zhang",
"Meng-Yao",
""
],
[
"Hassanabadi",
"Hassan",
""
],
[
"Lütfüoğlu",
"Bekir Can",
""
],
[
"Long",
"Zheng-Wen",
""
]
] | In this study, we employ the thermodynamic topological method to classify critical points for the dyonic AdS black holes with quasitopological electromagnetism in the Einstein-Gauss-Bonnet background. To this end, we find a small/large black hole phase transition in all dimensions of space-time, the existence of a conv... |
1912.06782 | Rajib Saha | Albin Joseph and Rajib Saha | Exact Solutions and Constraints on the Dark Energy Model in FRW Universe | 21 pages, 7 figures | null | 10.1007/s12036-021-09776-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inflationary epoch and the late time acceleration of the expansion rate
of universe can be explained by assuming a gravitationally coupled scalar
field. In this article, we propose a new method of finding exact solutions in
the background of flat Friedmann-Robertson-Walker (FRW) cosmological models by
considering... | [
{
"created": "Sat, 14 Dec 2019 04:30:41 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Sep 2022 10:02:46 GMT",
"version": "v2"
}
] | 2022-09-19 | [
[
"Joseph",
"Albin",
""
],
[
"Saha",
"Rajib",
""
]
] | The inflationary epoch and the late time acceleration of the expansion rate of universe can be explained by assuming a gravitationally coupled scalar field. In this article, we propose a new method of finding exact solutions in the background of flat Friedmann-Robertson-Walker (FRW) cosmological models by considering b... |
2001.02782 | Krzysztof G{\l}\'od | Krzysztof G{\l}\'od | 1+1+2 covariant formulation of light propagation in spacetime | 11 pages | Phys. Rev. D 101 (2020), 024021 | 10.1103/PhysRevD.101.024021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a covariant approach to the problem of light beam propagation in a
spacetime. We develop our considerations within the framework of classical
geometric optics in general relativity. Using the concept of a screen surface
orthogonal to the observer velocity and to the bundle of geodesics, we
introduce covari... | [
{
"created": "Wed, 8 Jan 2020 23:34:54 GMT",
"version": "v1"
}
] | 2020-01-10 | [
[
"Głód",
"Krzysztof",
""
]
] | We present a covariant approach to the problem of light beam propagation in a spacetime. We develop our considerations within the framework of classical geometric optics in general relativity. Using the concept of a screen surface orthogonal to the observer velocity and to the bundle of geodesics, we introduce covarian... |
1502.04445 | Farhad Darabi | Y. Heydarzade, M. Khodadi, and F. Darabi | Deformed Horava-Lifshitz Cosmology and Stability of Einstein Static
Universe | 9 pages, minor revision | Theor. Math. Phys (2017) 190: 130 | 10.1134/S0040577917010111 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stability of the Einstein static universe versus the linear scalar, vector
and tensor perturbations is investigated in the context of deformed
Ho\v{r}ava-Lifshitz cosmology inspired by entropic force scenario. A general
stability condition against the linear scalar perturbations is obtained. Using
this general condit... | [
{
"created": "Mon, 16 Feb 2015 07:34:12 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Feb 2017 08:12:41 GMT",
"version": "v2"
}
] | 2017-02-14 | [
[
"Heydarzade",
"Y.",
""
],
[
"Khodadi",
"M.",
""
],
[
"Darabi",
"F.",
""
]
] | Stability of the Einstein static universe versus the linear scalar, vector and tensor perturbations is investigated in the context of deformed Ho\v{r}ava-Lifshitz cosmology inspired by entropic force scenario. A general stability condition against the linear scalar perturbations is obtained. Using this general conditio... |
2106.07430 | Lu Yin | Bum-Hoon Lee, Wonwoo Lee, Dong-han Yeom, Lu Yin | Gravitational waves from the vacuum decay with LISA | null | Chin.Phys.C 46 (2022) 7, 075101 | 10.1088/1674-1137/ac5d2a | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the gravitational wave spectrum resulted from the cosmological
first-order phase transition. We compare two models; one is a scalar field
model without gravitation, while the other is a scalar field model with
gravitation. Based on the sensitivity curves of the LISA space-based
interferometer on the st... | [
{
"created": "Mon, 14 Jun 2021 13:47:41 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Aug 2021 04:40:05 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Jul 2022 13:48:36 GMT",
"version": "v3"
}
] | 2022-07-12 | [
[
"Lee",
"Bum-Hoon",
""
],
[
"Lee",
"Wonwoo",
""
],
[
"Yeom",
"Dong-han",
""
],
[
"Yin",
"Lu",
""
]
] | We investigate the gravitational wave spectrum resulted from the cosmological first-order phase transition. We compare two models; one is a scalar field model without gravitation, while the other is a scalar field model with gravitation. Based on the sensitivity curves of the LISA space-based interferometer on the stoc... |
1208.5494 | Yosef Zlochower | Yosef Zlochower, Marcelo Ponce, Carlos O. Lousto | Accuracy Issues for Numerical Waveforms | version accepted to PRD | Phys. Rev. D 86, 104056 (2012) | 10.1103/PhysRevD.86.104056 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the convergence properties of our implementation of the 'moving
punctures' approach at very high resolutions for an equal-mass, non-spinning,
black-hole binary. We find convergence of the Hamiltonian constraint on the
horizons and the L2 norm of the Hamiltonian constraint in the bulk for sixth
and eighth-ord... | [
{
"created": "Mon, 27 Aug 2012 20:14:08 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Nov 2012 14:50:35 GMT",
"version": "v2"
}
] | 2012-12-03 | [
[
"Zlochower",
"Yosef",
""
],
[
"Ponce",
"Marcelo",
""
],
[
"Lousto",
"Carlos O.",
""
]
] | We study the convergence properties of our implementation of the 'moving punctures' approach at very high resolutions for an equal-mass, non-spinning, black-hole binary. We find convergence of the Hamiltonian constraint on the horizons and the L2 norm of the Hamiltonian constraint in the bulk for sixth and eighth-order... |
gr-qc/9605005 | Simonetta Frittelli | Simonetta Frittelli (University of Pittsburgh) and Oscar A. Reula
(FaMAF, Argentina) | First-order symmetric-hyperbolic Einstein equations with arbitrary fixed
gauge | 5 pages; Latex with Revtex v3.0 macro package and style; to appear in
Phys. Rev. Lett | Phys.Rev.Lett. 76 (1996) 4667-4670 | 10.1103/PhysRevLett.76.4667 | null | gr-qc | null | We find a one-parameter family of variables which recast the 3+1 Einstein
equations into first-order symmetric-hyperbolic form for any fixed choice of
gauge. Hyperbolicity considerations lead us to a redefinition of the lapse in
terms of an arbitrary factor times a power of the determinant of the 3-metric;
under cert... | [
{
"created": "Wed, 1 May 1996 20:06:40 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Frittelli",
"Simonetta",
"",
"University of Pittsburgh"
],
[
"Reula",
"Oscar A.",
"",
"FaMAF, Argentina"
]
] | We find a one-parameter family of variables which recast the 3+1 Einstein equations into first-order symmetric-hyperbolic form for any fixed choice of gauge. Hyperbolicity considerations lead us to a redefinition of the lapse in terms of an arbitrary factor times a power of the determinant of the 3-metric; under certai... |
1606.04352 | Jiri Adamek | J. Adamek (Institute of Plasma Physics ASCR), J. Novotny (Faculty of
Science, Masaryk University) | New Superpotential in Conservation Laws in General Relativity | 6 pages, 1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work refers to the new formula for the superpotential Uikl in
conservation laws in general relativity satisfying the integral and
differential conservation laws within the Schwarzschild metric. The new
superpotential is composed of two terms. The first term is based on Mollers
concept and its a function of the m... | [
{
"created": "Wed, 8 Jun 2016 19:06:14 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Sep 2016 15:23:20 GMT",
"version": "v2"
}
] | 2016-09-27 | [
[
"Adamek",
"J.",
"",
"Institute of Plasma Physics ASCR"
],
[
"Novotny",
"J.",
"",
"Faculty of\n Science, Masaryk University"
]
] | This work refers to the new formula for the superpotential Uikl in conservation laws in general relativity satisfying the integral and differential conservation laws within the Schwarzschild metric. The new superpotential is composed of two terms. The first term is based on Mollers concept and its a function of the met... |
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