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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0611108 | Lars Andersson | Lars Andersson (UM and AEI), Robert Beig (Vienna), Bernd Schmidt (AEI) | Static self-gravitating elastic bodies in Einstein gravity | 29 pages. Updated to conform with published version, typos fixed | Commun.PureAppl.Math.61:988-1023,2008 | 10.1002/cpa.20230 | AEI-2006-084 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that given a stress-free elastic body there exists, for sufficiently
small values of the gravitational constant, a unique static solution of the
Einstein equations coupled to the equations of relativistic elasticity. The
solution constructed is a small deformation of the relaxed configuration. This
result yi... | [
{
"created": "Mon, 20 Nov 2006 21:36:25 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jan 2009 21:33:05 GMT",
"version": "v2"
}
] | 2009-01-12 | [
[
"Andersson",
"Lars",
"",
"UM and AEI"
],
[
"Beig",
"Robert",
"",
"Vienna"
],
[
"Schmidt",
"Bernd",
"",
"AEI"
]
] | We prove that given a stress-free elastic body there exists, for sufficiently small values of the gravitational constant, a unique static solution of the Einstein equations coupled to the equations of relativistic elasticity. The solution constructed is a small deformation of the relaxed configuration. This result yiel... |
2109.08531 | Carlos Pe\'on-Nieto | Marc Mars and Carlos Pe\'on-Nieto | Classification of Kerr-de Sitter-like spacetimes with conformally flat
$\mathscr{I}$ in all dimensions | 46 pages, 1 figure | null | 10.1103/PhysRevD.105.044027 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using asymptotic characterization results of spacetimes at conformal
infinity, we prove that Kerr-Schild-de Sitter spacetimes are in one-to-one
correspondence with spacetimes in the Kerr-de Sitter-like class with
conformally flat $\mathscr{I}$. Kerr-Schild-de Sitter are spacetimes of
Kerr-Schild form with de Sitter b... | [
{
"created": "Fri, 17 Sep 2021 13:11:44 GMT",
"version": "v1"
}
] | 2022-02-23 | [
[
"Mars",
"Marc",
""
],
[
"Peón-Nieto",
"Carlos",
""
]
] | Using asymptotic characterization results of spacetimes at conformal infinity, we prove that Kerr-Schild-de Sitter spacetimes are in one-to-one correspondence with spacetimes in the Kerr-de Sitter-like class with conformally flat $\mathscr{I}$. Kerr-Schild-de Sitter are spacetimes of Kerr-Schild form with de Sitter bac... |
1302.1237 | Stephen McCormick | Stephen McCormick | The Phase Space for the Einstein-Yang-Mills Equations and the First Law
of Black Hole Thermodynamics | 21 pages; references added. v3: typos corrected, minor formatting
changes. To appear in ATMP, 18(4) | Adv. Theor. Math. Phys. 18(4), 799 (2014) | 10.4310/ATMP.2014.v18.n4.a2 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the techniques of Bartnik (2005) to show that the space of solutions
to the Einstein-Yang-Mills constraint equations on an asymptotically at
manifold with one end and zero boundary components, has a Hilbert manifold
structure; the Einstein-Maxwell system can be considered as a special case.
This is equivalent ... | [
{
"created": "Wed, 6 Feb 2013 00:37:37 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2013 09:03:54 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Jul 2014 01:16:32 GMT",
"version": "v3"
}
] | 2014-12-02 | [
[
"McCormick",
"Stephen",
""
]
] | We use the techniques of Bartnik (2005) to show that the space of solutions to the Einstein-Yang-Mills constraint equations on an asymptotically at manifold with one end and zero boundary components, has a Hilbert manifold structure; the Einstein-Maxwell system can be considered as a special case. This is equivalent to... |
gr-qc/0202082 | Marcelo Salgado | Marcelo Salgado | On the linear and weak-field limits of scalar-tensor theories of gravity | 12 pages in revtex4-twocolumn format; submitted to Phys.Rev.D | null | null | null | gr-qc | null | The linear approximation of scalar-tensor theories of gravity is obtained in
the physical (Jordan) frame under the 4+0 (covariant) and 3+1 formalisms. Then
the weak-field limit is analyzed and the conditions leading to significant
deviations of the $1/r^{2}$ Newton's law of gravitation are discussed. Finally,
the sca... | [
{
"created": "Thu, 21 Feb 2002 21:36:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Salgado",
"Marcelo",
""
]
] | The linear approximation of scalar-tensor theories of gravity is obtained in the physical (Jordan) frame under the 4+0 (covariant) and 3+1 formalisms. Then the weak-field limit is analyzed and the conditions leading to significant deviations of the $1/r^{2}$ Newton's law of gravitation are discussed. Finally, the scala... |
gr-qc/0412135 | John Barrow | Douglas J. Shaw and John D. Barrow | Varying Couplings in Electroweak Theory | 10 pages, no figures | Phys.Rev. D71 (2005) 063525 | 10.1103/PhysRevD.71.063525 | null | gr-qc astro-ph hep-th | null | We extend the theory of Kimberly and Magueijo for the spacetime variation of
the electroweak couplings in the unified Glashow-Salam-Weinberg model of the
electroweak interaction to include quantum corrections. We derive the effective
quantum-corrected dilaton evolution equations in the presence of a background
cosmol... | [
{
"created": "Thu, 30 Dec 2004 15:39:21 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Shaw",
"Douglas J.",
""
],
[
"Barrow",
"John D.",
""
]
] | We extend the theory of Kimberly and Magueijo for the spacetime variation of the electroweak couplings in the unified Glashow-Salam-Weinberg model of the electroweak interaction to include quantum corrections. We derive the effective quantum-corrected dilaton evolution equations in the presence of a background cosmolog... |
1105.1413 | Juan Pablo Cruz P\'erez | Juan P. Cruz and Jos\'e A. Gonz\'alez | Symmetries without symmetries in Smoothed Particle Hydrodynamics | null | null | null | null | gr-qc physics.comp-ph physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a technique to solve numerically the relativistic Euler's
equations in scenarios with spherical symmetry using the standard Smoothed
Particles Hydrodynamics method in cartesian coordinates. This implementation
allow us to increase the resolution of the simulations in order to obtain
accurate results. We ... | [
{
"created": "Sat, 7 May 2011 02:59:39 GMT",
"version": "v1"
}
] | 2011-05-10 | [
[
"Cruz",
"Juan P.",
""
],
[
"González",
"José A.",
""
]
] | We introduce a technique to solve numerically the relativistic Euler's equations in scenarios with spherical symmetry using the standard Smoothed Particles Hydrodynamics method in cartesian coordinates. This implementation allow us to increase the resolution of the simulations in order to obtain accurate results. We te... |
1612.08812 | Ravindra Saraykar Dr. | R.V.Saraykar | Stability and Genericity Aspects of Properties of Space-times in General
Relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we review and discuss different aspects of stability and
genericity of some properties of space-times which occur in various contexts in
the General Theory of Relativity. We also give argument supporting the
conclusion that Linearization Stability is a generic property if we restrict
space-times to t... | [
{
"created": "Wed, 28 Dec 2016 06:55:47 GMT",
"version": "v1"
}
] | 2016-12-30 | [
[
"Saraykar",
"R. V.",
""
]
] | In this article, we review and discuss different aspects of stability and genericity of some properties of space-times which occur in various contexts in the General Theory of Relativity. We also give argument supporting the conclusion that Linearization Stability is a generic property if we restrict space-times to the... |
1409.2206 | Wlodzimierz Piechocki | Ewa Czuchry, Nick Kwidzinski, and Wlodzimierz Piechocki | Comparing the dynamics of diagonal and general Bianchi IX spacetime | 25 pages, 2 figures, version including numerical simulations of
dynamics | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make comparison of the dynamics of the diagonal and nondiagonal Bianchi IX
models in the evolution towards the cosmological singularity. Apart from the
original variables, we use the Hubble normalized ones commonly applied in the
examination of the dynamics of homogeneous models. Applying the dynamical
systems met... | [
{
"created": "Mon, 8 Sep 2014 04:59:24 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Oct 2014 11:02:55 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Oct 2015 06:29:31 GMT",
"version": "v3"
},
{
"created": "Sat, 21 Jul 2018 05:14:34 GMT",
"version": "v4"
}
] | 2018-07-24 | [
[
"Czuchry",
"Ewa",
""
],
[
"Kwidzinski",
"Nick",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We make comparison of the dynamics of the diagonal and nondiagonal Bianchi IX models in the evolution towards the cosmological singularity. Apart from the original variables, we use the Hubble normalized ones commonly applied in the examination of the dynamics of homogeneous models. Applying the dynamical systems metho... |
1410.4930 | Andronikos Paliathanasis | Andronikos Paliathanasis, Michael Tsamparlis, Spyros Basilakos | Dynamical symmetries and observational constraints in scalar field
cosmology | 20 pages; 4 figures; minor corrections to match with the Phys. Rev.
D. published version | Phys. Rev. D 90, 103524 (2014) | 10.1103/PhysRevD.90.103524 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to use dynamical symmetries of the field equations, in order to
classify the dark energy models in the context of scalar field (quintessence or
phantom) FLRW cosmologies. Practically, symmetries provide a useful
mathematical tool in physical problems since they can be used to simplify a
given system of dif... | [
{
"created": "Sat, 18 Oct 2014 09:37:13 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Nov 2014 14:15:32 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Tsamparlis",
"Michael",
""
],
[
"Basilakos",
"Spyros",
""
]
] | We propose to use dynamical symmetries of the field equations, in order to classify the dark energy models in the context of scalar field (quintessence or phantom) FLRW cosmologies. Practically, symmetries provide a useful mathematical tool in physical problems since they can be used to simplify a given system of diffe... |
1502.00777 | Muhammad Jamil Amir | M. Jamil Amir and M. Yussouf | Kantowski-Sachs Universe Models in $f(T)$ Theory of Gravity | Accepted for publication in IJTP. arXiv admin note: substantial text
overlap with arXiv:1105.6228 by other authors | null | 10.1007/s10773-015-2517-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $f(T)$ theory is recently proposed to explain the present cosmic
accelerating expansion of the universe. $f(T)$ theory is an extension of
Teleparallel theory of gravity, where $T$ is the torsion scalar. This paper
contains the construction of $f(T)$ models within the Kantowski-Sachs universe.
For this purpose, we... | [
{
"created": "Tue, 3 Feb 2015 08:27:45 GMT",
"version": "v1"
}
] | 2015-02-04 | [
[
"Amir",
"M. Jamil",
""
],
[
"Yussouf",
"M.",
""
]
] | The $f(T)$ theory is recently proposed to explain the present cosmic accelerating expansion of the universe. $f(T)$ theory is an extension of Teleparallel theory of gravity, where $T$ is the torsion scalar. This paper contains the construction of $f(T)$ models within the Kantowski-Sachs universe. For this purpose, we u... |
1705.08307 | Christian Corda Prof. | Sourav Haldar, Christian Corda, Subenoy Chakraborty | Tunnelling mechanism in non-commutative space with generalized
uncertainty principle and Bohr-like black hole | 17 pages, accepted for publication in the Advances in High Energy
Physics Special Issue "Theoretical and Observational Aspects of Black Holes,
Gravitational Waves, and Space-Time Singularities", Editors: Ozay Gurtug,
Deborah Konkowski and M. Sharif | Advances in High Energy Physics Volume 2018, Article ID 9851598, 9
pages | 10.1155/2018/9851598 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with non-thermal radiation spectrum by tunnelling mechanism
with correction due to the generalized uncertainty principle (GUP) in the
background of non-commutative geometry. Considering the reformulation of the
tunnelling mechanism by Banerjee and Majhi, the Hawking radiation spectrum is
evaluated thr... | [
{
"created": "Mon, 22 May 2017 12:40:35 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2017 09:01:13 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Feb 2018 09:36:37 GMT",
"version": "v3"
}
] | 2018-05-09 | [
[
"Haldar",
"Sourav",
""
],
[
"Corda",
"Christian",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The paper deals with non-thermal radiation spectrum by tunnelling mechanism with correction due to the generalized uncertainty principle (GUP) in the background of non-commutative geometry. Considering the reformulation of the tunnelling mechanism by Banerjee and Majhi, the Hawking radiation spectrum is evaluated throu... |
1004.2143 | Alexander Burinskii | Alexander Burinskii | New Aspects of the Problem of the Source of Kerr Spinning Particle | 8 pages, 1 fig., Essay written for Gravity Research Foundation
Competition 2010. | null | null | null | gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider development of the models of the source of the Kerr-Newman (KN)
solution and new aspects related with the obtained recently field model based
on a domain wall bubble with superconducting interior, arXiv:1003.2928[hep-th].
The internal Higgs field regularizes the KN solution, expelling electromagnetic
fiel... | [
{
"created": "Tue, 13 Apr 2010 11:01:52 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Burinskii",
"Alexander",
""
]
] | We consider development of the models of the source of the Kerr-Newman (KN) solution and new aspects related with the obtained recently field model based on a domain wall bubble with superconducting interior, arXiv:1003.2928[hep-th]. The internal Higgs field regularizes the KN solution, expelling electromagnetic field ... |
gr-qc/9909006 | Angelo Tartaglia | A. Tartaglia | Detection of the gravitomagnetic clock effect | 14 pages; Latex. To be published on Classical and Quantum Gravity | Class.Quant.Grav.17:783-792,2000 | 10.1088/0264-9381/17/4/304 | null | gr-qc | null | The essence of the gravitomagnetic clock effect is properly defined showing
that its origin is in the topology of world lines with closed space
projections. It is shown that, in weak field approximation and for a
spherically symmetric central body, the loss of synchrony between two clocks
counter-rotating along a cir... | [
{
"created": "Thu, 2 Sep 1999 08:46:23 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Sep 1999 13:18:45 GMT",
"version": "v2"
}
] | 2011-09-13 | [
[
"Tartaglia",
"A.",
""
]
] | The essence of the gravitomagnetic clock effect is properly defined showing that its origin is in the topology of world lines with closed space projections. It is shown that, in weak field approximation and for a spherically symmetric central body, the loss of synchrony between two clocks counter-rotating along a circu... |
2006.13287 | Ashkbiz Danehkar PhD | A. Danehkar | Gravitational Fields of the Magnetic-type | 10 pages, 1 figure. This essay received an Honorable Mention in the
2020 Essay Competition of the Gravity Research Foundation | Int.J.Mod.Phys.D29:2043001,2020 | 10.1142/S0218271820430014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Local conformal symmetry introduces the conformal curvature (Weyl tensor)
that gets split into its (gravito-) electric and magnetic (tensor) parts.
Newtonian tidal forces are expected from the gravitoelectric field, whereas
general-relativistic frame-dragging effects emerge from the gravitomagnetic
field. The symmetr... | [
{
"created": "Tue, 23 Jun 2020 19:35:57 GMT",
"version": "v1"
}
] | 2021-01-05 | [
[
"Danehkar",
"A.",
""
]
] | Local conformal symmetry introduces the conformal curvature (Weyl tensor) that gets split into its (gravito-) electric and magnetic (tensor) parts. Newtonian tidal forces are expected from the gravitoelectric field, whereas general-relativistic frame-dragging effects emerge from the gravitomagnetic field. The symmetric... |
gr-qc/0110082 | Oliver Henkel | Oliver Henkel | Global Prescribed Mean Curvature foliations in cosmological spacetimes
with matter, Part II | 25 pages, no figures | J.Math.Phys. 43 (2002) 2466-2485 | 10.1063/1.1466883 | AEI-2001-122 | gr-qc | null | This second part is devoted to the investigation of global properties of
Prescribed Mean Curvature (PMC) foliations in cosmological spacetimes with
local $U(1) \times U(1)$ symmetry and matter described by the Vlasov equation.
It turns out, that these spacetimes admit a global foliation by PMC surfaces,
as well, but ... | [
{
"created": "Thu, 18 Oct 2001 11:34:07 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Henkel",
"Oliver",
""
]
] | This second part is devoted to the investigation of global properties of Prescribed Mean Curvature (PMC) foliations in cosmological spacetimes with local $U(1) \times U(1)$ symmetry and matter described by the Vlasov equation. It turns out, that these spacetimes admit a global foliation by PMC surfaces, as well, but th... |
gr-qc/0404065 | Comelli Denis | D. Comelli, A. Dolgov | Determinant-Gravity: Cosmological implications | revtex format, 5 pages,8 figures,references added | JHEP0411:062,2004 | 10.1088/1126-6708/2004/11/062 | null | gr-qc | null | We analyze the action $\int d^4x \sqrt{\det||{\cal B} g_{\mu\nu}+ {\cal C}
R_{\mu\nu}}||$ as a possible alternative or addition to the Einstein gravity.
Choosing a particular form of ${\cal B}(R)= \sqrt {R}$ we can restore the
Einstein gravity and, if ${\cal B}=m^2$, we obtain the cosmological constant
term. Taking... | [
{
"created": "Thu, 15 Apr 2004 09:46:28 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 2004 14:11:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Comelli",
"D.",
""
],
[
"Dolgov",
"A.",
""
]
] | We analyze the action $\int d^4x \sqrt{\det||{\cal B} g_{\mu\nu}+ {\cal C} R_{\mu\nu}}||$ as a possible alternative or addition to the Einstein gravity. Choosing a particular form of ${\cal B}(R)= \sqrt {R}$ we can restore the Einstein gravity and, if ${\cal B}=m^2$, we obtain the cosmological constant term. Taking ${\... |
gr-qc/9703053 | Jacques Legare | M. A. Clayton (1), L. Demopoulos (2), and J. Legare (2) ((1) CERN
Theory Division, (2) Department of Physics, University of Toronto) | The Initial-Value Problem of Spherically Symmetric Wyman Sector
Nonsymmetric Gravitational Theory | REVTeX 3.0 with epsf macros and AMS symbols, 18 pages, 9 figures | null | null | UTPT-97-04 | gr-qc | null | We cast the four-dimensional field equations of the Nonsymmetric
Gravitational Theory (NGT) into a form appropriate for numerical study. In
doing so, we have restricted ourselves to spherically symmetric spacetimes, and
we have kept only the Wyman sector of the theory. We investigate the
well-posedness of the initial... | [
{
"created": "Thu, 20 Mar 1997 21:42:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Clayton",
"M. A.",
""
],
[
"Demopoulos",
"L.",
""
],
[
"Legare",
"J.",
""
]
] | We cast the four-dimensional field equations of the Nonsymmetric Gravitational Theory (NGT) into a form appropriate for numerical study. In doing so, we have restricted ourselves to spherically symmetric spacetimes, and we have kept only the Wyman sector of the theory. We investigate the well-posedness of the initial-v... |
2301.03951 | Alejandro Perez | Alejandro Perez, Salvatore Ribisi, Sami Viollet | Modelling quantum particles falling into a black hole: the deep interior
limit | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct a solvable toy model of the quantum dynamics of
the interior of a spherical black hole with falling spherical scalar field
excitations. We first argue about how some aspects of the quantum gravity
dynamics of realistic black holes emitting Hawking radiation can be modelled
using Kantowski-S... | [
{
"created": "Tue, 10 Jan 2023 13:16:32 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Perez",
"Alejandro",
""
],
[
"Ribisi",
"Salvatore",
""
],
[
"Viollet",
"Sami",
""
]
] | In this paper we construct a solvable toy model of the quantum dynamics of the interior of a spherical black hole with falling spherical scalar field excitations. We first argue about how some aspects of the quantum gravity dynamics of realistic black holes emitting Hawking radiation can be modelled using Kantowski-Sac... |
1008.2761 | Yosef Zlochower | Marcelo Ponce, Carlos Lousto, Yosef Zlochower | Seeking for toroidal event horizons from initially stationary BH
configurations | 24 pages, 14 figures | Class.Quant.Grav.28:145027,2011 | 10.1088/0264-9381/28/14/145027 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and evolve non-rotating vacuum initial data with a ring
singularity, based on a simple extension of the standard Brill-Lindquist
multiple black-hole initial data, and search for event horizons with spatial
slices that are toroidal when the ring radius is sufficiently large. While
evolutions of the ring s... | [
{
"created": "Mon, 16 Aug 2010 20:01:00 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2011 13:54:09 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Ponce",
"Marcelo",
""
],
[
"Lousto",
"Carlos",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We construct and evolve non-rotating vacuum initial data with a ring singularity, based on a simple extension of the standard Brill-Lindquist multiple black-hole initial data, and search for event horizons with spatial slices that are toroidal when the ring radius is sufficiently large. While evolutions of the ring sin... |
2405.13673 | Don N. Page | Don N. Page | Discrete Orbit Effect Lengthens Merger Times for Inspiraling Binary
Black Holes | 30 pages. arXiv admin note: text overlap with arXiv:2403.10804 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The inspiral merger time for two black holes captured into a nonrelativistic
bound orbit by gravitational radiation emission has been often calculated by a
formula of Peters that assumes the adiabatic approximation that the changes per
orbit are small. However, initially this is not true for the semimajor axis and
pe... | [
{
"created": "Wed, 22 May 2024 14:16:28 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Jun 2024 05:17:17 GMT",
"version": "v2"
}
] | 2024-06-11 | [
[
"Page",
"Don N.",
""
]
] | The inspiral merger time for two black holes captured into a nonrelativistic bound orbit by gravitational radiation emission has been often calculated by a formula of Peters that assumes the adiabatic approximation that the changes per orbit are small. However, initially this is not true for the semimajor axis and peri... |
2404.09923 | Gustavo Oleg\'ario Heymans Ms. | G. O. Heymans, G. Scorza, N. F. Svaiter, C. D. Rodr\'iguez-Camargo | The generalized second law in Euclidean Schwarzschild black hole | 12 pages, 2 figures | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | We discuss the Bekenstein generalized entropy of Schwarzschild black hole,
with the contribution of an external matter field affected by degrees of
freedom inside the event horizon. To take into accountthis effect to the
generalized entropy, we use Euclidean functional methods. In the Euclidean
section of the Schwarz... | [
{
"created": "Mon, 15 Apr 2024 16:50:49 GMT",
"version": "v1"
}
] | 2024-04-16 | [
[
"Heymans",
"G. O.",
""
],
[
"Scorza",
"G.",
""
],
[
"Svaiter",
"N. F.",
""
],
[
"Rodríguez-Camargo",
"C. D.",
""
]
] | We discuss the Bekenstein generalized entropy of Schwarzschild black hole, with the contribution of an external matter field affected by degrees of freedom inside the event horizon. To take into accountthis effect to the generalized entropy, we use Euclidean functional methods. In the Euclidean section of the Schwarzsc... |
1107.1267 | P Ajith | P. Ajith | Addressing the spin question in gravitational-wave searches: Waveform
templates for inspiralling compact binaries with nonprecessing spins | 16 pages, 11 figures, More material added, Some changes to clarify
the presentation | Phys. Rev. D 84, 084037 (2011) | 10.1103/PhysRevD.84.084037 | LIGO-P1100075-v5 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a post-Newtonian (PN) template family of gravitational
waveforms from inspiralling compact binaries with non-precessing spins, where
the spin effects are described by a single "reduced-spin" parameter. This
template family, which reparametrizes all the spin-dependent PN terms in terms
of the leadi... | [
{
"created": "Wed, 6 Jul 2011 22:06:19 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2011 20:13:37 GMT",
"version": "v2"
}
] | 2011-10-20 | [
[
"Ajith",
"P.",
""
]
] | This paper presents a post-Newtonian (PN) template family of gravitational waveforms from inspiralling compact binaries with non-precessing spins, where the spin effects are described by a single "reduced-spin" parameter. This template family, which reparametrizes all the spin-dependent PN terms in terms of the leading... |
2009.13508 | Bayram Tekin | Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin | Comment on "Einstein-Gauss-Bonnet Gravity in 4-Dimensional Space-Time'' | null | Phys. Rev. Lett. 125, 149001 (2020) | 10.1103/PhysRevLett.125.149001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize our proof that the "Einstein-Gauss-Bonnet Gravity in
Four-Dimensional Spacetime" introduced in Phys. Rev. Lett. 124, 081301 (2020)
does not have consistent field equations, as such the theory does not exist.
The proof is given in both the metric and the first order formalisms.
| [
{
"created": "Mon, 28 Sep 2020 17:57:28 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Gurses",
"Metin",
""
],
[
"Sisman",
"Tahsin Cagri",
""
],
[
"Tekin",
"Bayram",
""
]
] | We summarize our proof that the "Einstein-Gauss-Bonnet Gravity in Four-Dimensional Spacetime" introduced in Phys. Rev. Lett. 124, 081301 (2020) does not have consistent field equations, as such the theory does not exist. The proof is given in both the metric and the first order formalisms. |
gr-qc/0006082 | Simonetta Frittelli | Simonetta Frittelli and Roberto Gomez | Ill-posedness in the Einstein equations | 13 pages, 3 figures, accepted for publication in Journal of
Mathematical Physics (to appear August 2000) | J.Math.Phys. 41 (2000) 5535-5549 | 10.1063/1.533423 | null | gr-qc | null | It is shown that the formulation of the Einstein equations widely in use in
numerical relativity, namely, the standard ADM form, as well as some of its
variations (including the most recent conformally-decomposed version), suffers
from a certain but standard type of ill-posedness. Specifically, the norm of
the soluti... | [
{
"created": "Thu, 22 Jun 2000 17:48:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Frittelli",
"Simonetta",
""
],
[
"Gomez",
"Roberto",
""
]
] | It is shown that the formulation of the Einstein equations widely in use in numerical relativity, namely, the standard ADM form, as well as some of its variations (including the most recent conformally-decomposed version), suffers from a certain but standard type of ill-posedness. Specifically, the norm of the solution... |
gr-qc/9404032 | Martin Rainer | M. Rainer | Resolution of simple singularities yielding particle symmetries in a
space-time | 16 pages, LaTeX | J.Math.Phys.35:646-655,1994 | 10.1063/1.530658 | Univ-Potsdam-MATH-93/07 | gr-qc alg-geom hep-th math.AG | null | A finite subgroup of the conformal group SL(2,C) can be related to invariant
polynomials on a hypersurface in C^3. The latter then carries a simple
singularity, which resolves by a finite iteration of basic cycles of
deprojections. The homological intersection graph of this cycles is the Dynkin
graph of an ADE Lie gr... | [
{
"created": "Sun, 17 Apr 1994 10:43:16 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Rainer",
"M.",
""
]
] | A finite subgroup of the conformal group SL(2,C) can be related to invariant polynomials on a hypersurface in C^3. The latter then carries a simple singularity, which resolves by a finite iteration of basic cycles of deprojections. The homological intersection graph of this cycles is the Dynkin graph of an ADE Lie grou... |
gr-qc/0601142 | Lode Wylleman | Lode Wylleman | Anti-Newtonian universes do not exist | 16 pages | Class.Quant.Grav.23:2727-2740,2006 | 10.1063/1.2218261 | null | gr-qc | null | In a paper by Maartens, Lesame and Ellis (Class. Quant. Grav. 15, 1005) it
was shown that irrotational dust solutions with vanishing electric part of the
Weyl tensor are subject to severe integrability conditions and it was
conjectured that the only such solutions are FLRW spacetimes. In their analysis
the possibilit... | [
{
"created": "Tue, 31 Jan 2006 17:11:29 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Wylleman",
"Lode",
""
]
] | In a paper by Maartens, Lesame and Ellis (Class. Quant. Grav. 15, 1005) it was shown that irrotational dust solutions with vanishing electric part of the Weyl tensor are subject to severe integrability conditions and it was conjectured that the only such solutions are FLRW spacetimes. In their analysis the possibility ... |
gr-qc/9703084 | Sam Drake | S. P. Drake and R. Turolla | The Application of the Newman-Janis Algorithm in Obtaining Interior
Solutions of the Kerr Metric | 11 pages, Latex, 4 postscript figures. To be published in Classical
and Quantum Gravity. Title and abstract are now on the same page | Class.Quant.Grav. 14 (1997) 1883-1897 | 10.1088/0264-9381/14/7/021 | null | gr-qc | null | In this paper we present a class of metrics to be considered as new possible
sources for the Kerr metric. These new solutions are generated by applying the
Newman-Janis algorithm (NJA) to any static spherically symmetric (SSS) ``seed''
metric. The continuity conditions for joining any two of these new metrics is
pres... | [
{
"created": "Fri, 28 Mar 1997 02:34:37 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Drake",
"S. P.",
""
],
[
"Turolla",
"R.",
""
]
] | In this paper we present a class of metrics to be considered as new possible sources for the Kerr metric. These new solutions are generated by applying the Newman-Janis algorithm (NJA) to any static spherically symmetric (SSS) ``seed'' metric. The continuity conditions for joining any two of these new metrics is presen... |
1505.01353 | Mariam Bouhmadi-Lopez | Imanol Albarran and Mariam Bouhmadi-L\'opez | Quantisation of the holographic Ricci dark energy model | 10 pages, RevTex4-1. Expanded and improved discussion. Version
accepted in JCAP | null | 10.1088/1475-7516/2015/08/051 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While general relativity is an extremely robust theory to describe the
gravitational interaction in our Universe, it is expected to fail close to
singularities like the cosmological ones. On the other hand, it is well known
that some dark energy models might induce future singularities; this can be the
case for examp... | [
{
"created": "Wed, 6 May 2015 13:00:14 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2015 13:57:58 GMT",
"version": "v2"
}
] | 2015-09-09 | [
[
"Albarran",
"Imanol",
""
],
[
"Bouhmadi-López",
"Mariam",
""
]
] | While general relativity is an extremely robust theory to describe the gravitational interaction in our Universe, it is expected to fail close to singularities like the cosmological ones. On the other hand, it is well known that some dark energy models might induce future singularities; this can be the case for example... |
1804.07415 | Robert A Eisenstein | Robert A. Eisenstein | Numerical Relativity and the Discovery of Gravitational Waves | 14 pages, 6 figures | null | 10.1002/andp.201800348 | P1800055v4 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solving Einstein's equations precisely for strong-field gravitational systems
is essential to determining the full physics content of gravitational wave
detections. Without these solutions it is not possible to infer precise values
for initial and final-state system parameters. Obtaining these solutions
requires exte... | [
{
"created": "Fri, 20 Apr 2018 00:48:04 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Sep 2018 17:58:25 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Mar 2019 20:38:10 GMT",
"version": "v3"
}
] | 2019-09-04 | [
[
"Eisenstein",
"Robert A.",
""
]
] | Solving Einstein's equations precisely for strong-field gravitational systems is essential to determining the full physics content of gravitational wave detections. Without these solutions it is not possible to infer precise values for initial and final-state system parameters. Obtaining these solutions requires extens... |
gr-qc/0309053 | T. Padmanabhan | T. Padmanabhan, Apoorva Patel | Role of Horizons in Semiclassical Gravity: Entropy and the Area Spectrum | Extends and presents the results of hep-th/0305165 in a broader
context; clarifies some conceptual issues; 24 pages; revtex | null | null | null | gr-qc astro-ph hep-th | null | In any space-time, it is possible to have a family of observers who have
access to only part of the space-time manifold, because of the existence of a
horizon. We demand that \emph{physical theories in a given coordinate system
must be formulated entirely in terms of variables that an observer using that
coordinate s... | [
{
"created": "Tue, 9 Sep 2003 15:20:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Padmanabhan",
"T.",
""
],
[
"Patel",
"Apoorva",
""
]
] | In any space-time, it is possible to have a family of observers who have access to only part of the space-time manifold, because of the existence of a horizon. We demand that \emph{physical theories in a given coordinate system must be formulated entirely in terms of variables that an observer using that coordinate sys... |
2112.07336 | Liang-Bi Wu | Li-Ming Cao and Liang-Bi Wu | A Note on the Strong Hyperbolicity of $f(R)$ Gravity with Dynamical
Shifts | revtex, 12 pages, no figures | null | 10.1103/PhysRevD.105.124062 | ICTS-USTC/PCFT-21-47 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The well-posedness of the gravitational equations of $f(R)$ gravity are
studied in this paper. Three formulations of the $f(R)$ gravity with dynamical
shifts (which are all based on the Arnowitt-Deser-Misner (ADM) formalism of the
equations) are investigated. These three formulations are all proved to be
strongly hyp... | [
{
"created": "Tue, 14 Dec 2021 12:46:50 GMT",
"version": "v1"
}
] | 2022-07-13 | [
[
"Cao",
"Li-Ming",
""
],
[
"Wu",
"Liang-Bi",
""
]
] | The well-posedness of the gravitational equations of $f(R)$ gravity are studied in this paper. Three formulations of the $f(R)$ gravity with dynamical shifts (which are all based on the Arnowitt-Deser-Misner (ADM) formalism of the equations) are investigated. These three formulations are all proved to be strongly hyper... |
2003.02286 | Carlos O. Lousto | James Healy, Carlos O. Lousto, Nicole Rosato | Adapted gauge to a quasilocal measure of the black holes recoil | 14 pages, 9 figures | Phys. Rev. D 102, 024040 (2020) | 10.1103/PhysRevD.102.024040 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore different gauge choices in the moving puncture formulation in
order to improve the accuracy of a linear momentum measure evaluated on the
horizon of the remnant black hole produced by the merger of a binary. In
particular, motivated by constant values studies, we design a gauge via a
variable shift paramet... | [
{
"created": "Wed, 4 Mar 2020 19:03:14 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 19:02:34 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Jun 2020 15:25:23 GMT",
"version": "v3"
}
] | 2020-07-22 | [
[
"Healy",
"James",
""
],
[
"Lousto",
"Carlos O.",
""
],
[
"Rosato",
"Nicole",
""
]
] | We explore different gauge choices in the moving puncture formulation in order to improve the accuracy of a linear momentum measure evaluated on the horizon of the remnant black hole produced by the merger of a binary. In particular, motivated by constant values studies, we design a gauge via a variable shift parameter... |
2112.02126 | Piotr T. Chru\'sciel | Piotr T. Chrusciel | Quo Vadis, Mathematical General Relativity? | 8 pages, 1 Table, talk at the Oberwolfach workshop on Mathematical
Aspects of General Relativity, August 29 - September 4, 2021, to appear in
the Proceedings | null | null | null | gr-qc math.DG | http://creativecommons.org/licenses/by-nc-sa/4.0/ | A review of selected topics in mathematical general relativity
| [
{
"created": "Thu, 2 Dec 2021 16:03:40 GMT",
"version": "v1"
}
] | 2021-12-07 | [
[
"Chrusciel",
"Piotr T.",
""
]
] | A review of selected topics in mathematical general relativity |
gr-qc/9501039 | David Graham Wands | Jose P. Mimoso and David Wands | Anisotropic Scalar-Tensor Cosmologies | 30 pages, LaTeX, four uuencoded postscript figures | Phys.Rev. D52 (1995) 5612-5627 | 10.1103/PhysRevD.52.5612 | SUSSEX-AST-95/1-2 | gr-qc | null | We examine homogeneous but anisotropic cosmologies in scalar-tensor gravity
theories, including Brans-Dicke gravity. We present a method for deriving
solutions for any isotropic perfect fluid with a barotropic equation of state
($p\propto\rho$) in a spatially flat (Bianchi type~I) cosmology. These models
approach an ... | [
{
"created": "Fri, 27 Jan 1995 17:10:05 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Mimoso",
"Jose P.",
""
],
[
"Wands",
"David",
""
]
] | We examine homogeneous but anisotropic cosmologies in scalar-tensor gravity theories, including Brans-Dicke gravity. We present a method for deriving solutions for any isotropic perfect fluid with a barotropic equation of state ($p\propto\rho$) in a spatially flat (Bianchi type~I) cosmology. These models approach an is... |
1004.2906 | Roberto Chan | R. Chan, M.F.A. da Silva, Jaime F. Villas da Rocha | Dynamical Evolution of an Unstable Gravastar with Zero Mass | 8 pages, 10 figures, to appear in Astrophysics and Space Science | Astrophys. Spa. Sci. 337, 185-191, 2012 | 10.1007/s10509-011-0858-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the conventional gravastar model, that is, an object constituted by two
components where one of them is a massive infinitely thin shell and the other
one is a de Sitter interior spacetime, we physically interpret a solution
characterized by a zero Schwarzschild mass. No stable gravastar is formed and
it collaps... | [
{
"created": "Fri, 16 Apr 2010 19:06:48 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2011 13:35:16 GMT",
"version": "v2"
}
] | 2012-10-30 | [
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"da Rocha",
"Jaime F. Villas",
""
]
] | Using the conventional gravastar model, that is, an object constituted by two components where one of them is a massive infinitely thin shell and the other one is a de Sitter interior spacetime, we physically interpret a solution characterized by a zero Schwarzschild mass. No stable gravastar is formed and it collapses... |
gr-qc/0203097 | Metin Gurses | Metin Gurses (Bilkent University) and Ozgur Sarioglu (METU) | Accelerated Charge Kerr-Schild Metrics in D-Dimensions | Title changed, added references, corrected typos, added a section. To
be published in Classical and Quantum Gravity | Class.Quant.Grav. 19 (2002) 4249-4262; Erratum-ibid. 20 (2003)
1413-1414 | 10.1088/0264-9381/19/16/302 | null | gr-qc hep-th | null | We consider the D dimensional Einstein Maxwell theory with a null fluid in
the Kerr-Schild Geometry. We obtain a complete set of differential conditions
that are necessary for finding solutions. We examine the case of vanishing
pressure and cosmological constant in detail. For this specific case, we give
the metric, ... | [
{
"created": "Wed, 27 Mar 2002 12:04:40 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jul 2002 14:01:58 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jul 2002 06:50:54 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Gurses",
"Metin",
"",
"Bilkent University"
],
[
"Sarioglu",
"Ozgur",
"",
"METU"
]
] | We consider the D dimensional Einstein Maxwell theory with a null fluid in the Kerr-Schild Geometry. We obtain a complete set of differential conditions that are necessary for finding solutions. We examine the case of vanishing pressure and cosmological constant in detail. For this specific case, we give the metric, th... |
gr-qc/0507041 | Lorenzo Iorio | Lorenzo Iorio | First preliminary tests of the general relativistic gravitomagnetic
field of the Sun and new constraints on a Yukawa-like fifth force from
planetary data | LaTex, 22 pages, 1 figure, 5 tables, 62 references. To appear in
Planetary and Space Science | Planet.SpaceSci.55:1290-1298,2007 | 10.1016/j.pss.2007.04.001 | null | gr-qc astro-ph hep-ph physics.space-ph | null | The general relativistic Lense-Thirring precessions of the perihelia of the
inner planets of the Solar System are about 10^-3 arcseconds per century.
Recent improvements in planetary orbit determination may yield the first
observational evidence of such a tiny effect. Indeed, corrections to the known
perihelion rates... | [
{
"created": "Sat, 9 Jul 2005 08:10:46 GMT",
"version": "v1"
},
{
"created": "Fri, 19 May 2006 15:43:42 GMT",
"version": "v10"
},
{
"created": "Tue, 27 Mar 2007 20:26:51 GMT",
"version": "v11"
},
{
"created": "Sat, 21 Apr 2007 13:46:36 GMT",
"version": "v12"
},
{
... | 2008-11-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | The general relativistic Lense-Thirring precessions of the perihelia of the inner planets of the Solar System are about 10^-3 arcseconds per century. Recent improvements in planetary orbit determination may yield the first observational evidence of such a tiny effect. Indeed, corrections to the known perihelion rates o... |
0710.4260 | Kjell Rosquist | Kjell Rosquist, Tomas Bylund, Lars Samuelsson | Carter's constant revealed | Minor changes to match published version | Int.J.Mod.Phys.D18:429-434,2009 | 10.1142/S0218271809014546 | NORDITA 2007-31 | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new formulation of Carter's constant for geodesic motion in Kerr black
holes is given. It is shown that Carter's constant corresponds to the total
angular momentum plus a precisely defined part which is quadratic in the linear
momenta. The characterization is exact in the weak field limit obtained by
letting the gr... | [
{
"created": "Tue, 23 Oct 2007 10:56:11 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Oct 2007 12:25:27 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Mar 2009 12:26:40 GMT",
"version": "v3"
}
] | 2009-05-12 | [
[
"Rosquist",
"Kjell",
""
],
[
"Bylund",
"Tomas",
""
],
[
"Samuelsson",
"Lars",
""
]
] | A new formulation of Carter's constant for geodesic motion in Kerr black holes is given. It is shown that Carter's constant corresponds to the total angular momentum plus a precisely defined part which is quadratic in the linear momenta. The characterization is exact in the weak field limit obtained by letting the grav... |
gr-qc/9706058 | Gerard 't Hooft | G. 't Hooft | The self-screening Hawking atmosphere | 19 pages, plain TeX, 5 figures PostScript. The author was made aware
of further references to older work, in view of which modifications were made
in order to avoid too much overlap. A discussion is added on the case
$\kappa=1$ | Nucl.Phys.Proc.Suppl. 68 (1998) 174-184 | 10.1016/S0920-5632(98)00151-0 | THU-97/14 | gr-qc | null | A model is proposed in which the Hawking particles emitted by a black hole
are treated as an envelope of matter that obeys an equation of state, and acts
as a source in Einstein's equations. This is a crude but interesting way to
accommodate for the back reaction. For large black holes, the solution can be
given anal... | [
{
"created": "Thu, 19 Jun 1997 07:53:55 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Aug 1997 15:19:01 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Hooft",
"G. 't",
""
]
] | A model is proposed in which the Hawking particles emitted by a black hole are treated as an envelope of matter that obeys an equation of state, and acts as a source in Einstein's equations. This is a crude but interesting way to accommodate for the back reaction. For large black holes, the solution can be given analyt... |
1707.03021 | Vitor Cardoso | Vitor Cardoso, Paolo Pani | The observational evidence for horizons: from echoes to precision
gravitational-wave physics | Expanded version of a "Perspectives" article submitted to Nature
Astronomy arXiv:1709.01525; Superseded by arXiv:1904.05363 (invited Review
article for Living Reviews in Relativity) | Nat.Astron. 1 (2017) 586-591 | 10.1038/s41550-017-0225-y | null | gr-qc astro-ph.HE hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of black holes and of spacetime singularities is a fundamental
issue in science. Despite this, observations supporting their existence are
scarce, and their interpretation unclear. We overview how strong a case for
black holes has been made in the last few decades, and how well observations
adjust to th... | [
{
"created": "Mon, 10 Jul 2017 18:56:24 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jul 2017 12:54:02 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Sep 2017 06:07:23 GMT",
"version": "v3"
},
{
"created": "Sun, 8 Oct 2017 07:51:00 GMT",
"version": "v4"
},
{
"cr... | 2019-04-15 | [
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | The existence of black holes and of spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpretation unclear. We overview how strong a case for black holes has been made in the last few decades, and how well observations adjust to this... |
2011.08680 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou, F.P. Fronimos | Canonical Scalar Field Inflation with String and $R^2$-Corrections | AoP Accepted-Abstract is reduced due to arXiv limitations | null | 10.1016/j.aop.2020.168359 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming that a scalar field controls the inflationary era, we examine the
combined effects of string and $f(R)$ gravity corrections on the inflationary
dynamics of canonical scalar field inflation, imposing the constraint that the
speed of the primordial gravitational waves is equal to that of light's.
Particularly,... | [
{
"created": "Tue, 17 Nov 2020 14:56:28 GMT",
"version": "v1"
}
] | 2020-12-30 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Fronimos",
"F. P.",
""
]
] | Assuming that a scalar field controls the inflationary era, we examine the combined effects of string and $f(R)$ gravity corrections on the inflationary dynamics of canonical scalar field inflation, imposing the constraint that the speed of the primordial gravitational waves is equal to that of light's. Particularly, w... |
gr-qc/0511047 | Shahar Hod | Shahar Hod | Quasinormal Spectrum and Quantization of Charged Black Holes | 4 pages | Class.Quant.Grav. 23 (2006) L23-L28 | 10.1088/0264-9381/23/4/L01 | null | gr-qc | null | Black-hole quasinormal modes have been the subject of much recent attention,
with the hope that these oscillation frequencies may shed some light on the
elusive theory of quantum gravity. We study {\it analytically} the asymptotic
quasinormal spectrum of a {\it charged} scalar field in the (charged)
Reissner-Nordstr\... | [
{
"created": "Wed, 9 Nov 2005 19:38:31 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hod",
"Shahar",
""
]
] | Black-hole quasinormal modes have been the subject of much recent attention, with the hope that these oscillation frequencies may shed some light on the elusive theory of quantum gravity. We study {\it analytically} the asymptotic quasinormal spectrum of a {\it charged} scalar field in the (charged) Reissner-Nordstr\"o... |
1903.07029 | Sang Pyo Kim | Sang Pyo Kim (Kunsan Nat'l Univ.) | Simulation of Quantum Universe | LaTex, 8 pages, no figure; DICE 2017, Italy, September 17-21, 2018 | null | 10.1088/1742-6596/1275/1/012057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum simulation provides quantum systems under study with analogous
controllable quantum systems and has wide applications from condensed-matter
physics to high energy physics and to cosmology. The quantum system of a
homogeneous and isotropic field in the Friedmann-Robertson-Walker universe can
be simulated by a ... | [
{
"created": "Sun, 17 Mar 2019 05:27:02 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Kim",
"Sang Pyo",
"",
"Kunsan Nat'l Univ."
]
] | Quantum simulation provides quantum systems under study with analogous controllable quantum systems and has wide applications from condensed-matter physics to high energy physics and to cosmology. The quantum system of a homogeneous and isotropic field in the Friedmann-Robertson-Walker universe can be simulated by a ch... |
gr-qc/9609034 | Lee Smolin | Lee Smolin | The classical limit and the form of the hamiltonian constraint in
nonperturbative quantum gravity | Latex, 37 pages, no figures | null | null | CGPG-96/94 | gr-qc hep-th | null | It is argued that some approaches to non-perturbative quantum general
relativity lack a sensible continuum limit that reproduces general relativity.
The basic problem is that generic physical states lack long ranged
correlations, because the form of the state allows a division into spatial
regions, such that no chang... | [
{
"created": "Thu, 12 Sep 1996 20:56:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Smolin",
"Lee",
""
]
] | It is argued that some approaches to non-perturbative quantum general relativity lack a sensible continuum limit that reproduces general relativity. The basic problem is that generic physical states lack long ranged correlations, because the form of the state allows a division into spatial regions, such that no change ... |
gr-qc/9907050 | Patricio S. Letelier | Patricio S. Letelier | Exact General Relativistic Disks with Magnetic Fields | 21 pages, 11 figures, uses package graphics, accepted in PRD | Phys.Rev. D60 (1999) 104042 | 10.1103/PhysRevD.60.104042 | null | gr-qc astro-ph | null | The well-known ``displace, cut, and reflect'' method used to generate cold
disks from given solutions of Einstein equations is extended to solutions of
Einstein-Maxwell equations. Four exact solutions of the these last equations
are used to construct models of hot disks with surface density, azimuthal
pressure, and a... | [
{
"created": "Tue, 13 Jul 1999 17:15:34 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Letelier",
"Patricio S.",
""
]
] | The well-known ``displace, cut, and reflect'' method used to generate cold disks from given solutions of Einstein equations is extended to solutions of Einstein-Maxwell equations. Four exact solutions of the these last equations are used to construct models of hot disks with surface density, azimuthal pressure, and azi... |
gr-qc/0407008 | Sukanta Bose | Aaron Rogan and Sukanta Bose (Washington State University) | Optimal statistic for detecting gravitational wave signals from binary
inspirals with LISA | 22 pages, 15 eps figures, Latex, uses iopart style/class files. Based
on talk given at the 8th Gravitational Wave Data Analysis Workshop,
Milwaukee, USA, December 17-20, 2003. Accepted for publication in Class.
Quant. Grav | Class.Quant.Grav. 21 (2004) S1607-S1624 | 10.1088/0264-9381/21/20/004 | null | gr-qc astro-ph | null | A binary compact object early in its inspiral phase will be picked up by its
nearly monochromatic gravitational radiation by LISA. But even this innocuous
appearing candidate poses interesting detection challenges. The data that will
be scanned for such sources will be a set of three functions of LISA's twelve
data s... | [
{
"created": "Fri, 2 Jul 2004 00:38:27 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Rogan",
"Aaron",
"",
"Washington State University"
],
[
"Bose",
"Sukanta",
"",
"Washington State University"
]
] | A binary compact object early in its inspiral phase will be picked up by its nearly monochromatic gravitational radiation by LISA. But even this innocuous appearing candidate poses interesting detection challenges. The data that will be scanned for such sources will be a set of three functions of LISA's twelve data str... |
0802.1561 | David Mattingly | David Mattingly | Have we tested Lorentz invariance enough? | 17 pages, Talk given at 'From Quantum to Emergent Gravity: Theory and
Phenomenology', SISSA, June 2007 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by ideas from quantum gravity, Lorentz invariance has undergone
many stringent tests over the past decade and passed every one. Since there is
no conclusive reason from quantum gravity that the symmetry \textit{must} be
violated at some point we should ask the questions: a) are the existing tests
sufficient... | [
{
"created": "Tue, 12 Feb 2008 03:33:17 GMT",
"version": "v1"
}
] | 2008-02-13 | [
[
"Mattingly",
"David",
""
]
] | Motivated by ideas from quantum gravity, Lorentz invariance has undergone many stringent tests over the past decade and passed every one. Since there is no conclusive reason from quantum gravity that the symmetry \textit{must} be violated at some point we should ask the questions: a) are the existing tests sufficient t... |
1501.05848 | Astrid Eichhorn | Astrid Eichhorn | The Renormalization Group flow of unimodular f(R) gravity | 17 pages, 2 figures; new version with some clarifications, identical
to version to appear in JHEP | null | 10.1007/JHEP04(2015)096 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unimodular gravity is classically equivalent to General Relativity. This
equivalence extends to actions which are functions of the curvature scalar. At
the quantum level, the dynamics could differ. Most importantly, the
cosmological constant is not a coupling in the unimodular action, providing a
new vantage point fr... | [
{
"created": "Fri, 23 Jan 2015 15:59:30 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Apr 2015 09:18:37 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Eichhorn",
"Astrid",
""
]
] | Unimodular gravity is classically equivalent to General Relativity. This equivalence extends to actions which are functions of the curvature scalar. At the quantum level, the dynamics could differ. Most importantly, the cosmological constant is not a coupling in the unimodular action, providing a new vantage point from... |
gr-qc/0311004 | Ghanashyam Date | Martin Bojowald, Ghanashyam Date and Kevin Vandersloot | Homogeneous Loop Quantum Cosmology: The Role of the Spin Connection | revtex4, 36 pages, 10 figures. In version 2 the introduction is
expanded, section III E is added and a paragraph on relevance of results is
added in the conclusions. Refs updated, results unchanged. To appear in
Class. Quant. Gravity | Class.Quant.Grav.21:1253-1278,2004 | 10.1088/0264-9381/21/4/034 | IMSc/2003/04/06, CGPG-03/10-5, AEI-2003-085 | gr-qc hep-th | null | Homogeneous cosmological models with non-vanishing intrinsic curvature
require a special treatment when they are quantized with loop quantum
cosmological methods. Guidance from the full theory which is lost in this
context can be replaced by two criteria for an acceptable quantization,
admissibility of a continuum ap... | [
{
"created": "Mon, 3 Nov 2003 07:17:08 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2004 12:35:30 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bojowald",
"Martin",
""
],
[
"Date",
"Ghanashyam",
""
],
[
"Vandersloot",
"Kevin",
""
]
] | Homogeneous cosmological models with non-vanishing intrinsic curvature require a special treatment when they are quantized with loop quantum cosmological methods. Guidance from the full theory which is lost in this context can be replaced by two criteria for an acceptable quantization, admissibility of a continuum appr... |
1911.03213 | Julio Arrechea | Julio Arrechea, Carlos Barcel\'o, Ra\'ul Carballo-Rubio, Luis J. Garay | Schwarzschild geometry counterpart in semiclassical gravity | 22 pages, 4 figures, v2: references and minor changes added to match
published version | Phys. Rev. D 101, 064059 (2020) | 10.1103/PhysRevD.101.064059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects of vacuum polarization on vacuum static
spherically-symmetric spacetimes. We start from the Polyakov approximation to
the renormalized stress-energy tensor (RSET) of a minimally coupled massless
scalar field. This RSET is not regular at $r=0$, so we define a regularized
version of the Polya... | [
{
"created": "Fri, 8 Nov 2019 12:23:27 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2020 23:11:04 GMT",
"version": "v2"
}
] | 2020-05-08 | [
[
"Arrechea",
"Julio",
""
],
[
"Barceló",
"Carlos",
""
],
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Garay",
"Luis J.",
""
]
] | We investigate the effects of vacuum polarization on vacuum static spherically-symmetric spacetimes. We start from the Polyakov approximation to the renormalized stress-energy tensor (RSET) of a minimally coupled massless scalar field. This RSET is not regular at $r=0$, so we define a regularized version of the Polyako... |
gr-qc/0104040 | Lee Samuel Finn | Lee Samuel Finn and Albert Lazzarini | Modulating the experimental signature of a stochastic gravitational wave
backgroun | 20 pages, including 5 in-lined figures. Submitted to PRD | Phys.Rev.D64:082002,2001 | 10.1103/PhysRevD.64.082002 | null | gr-qc | null | Detecting a stationary, stochastic gravitational wave signal is complicated
by impossibility of observing the detector noise independently of the signal.
One consequence is that we require at least two detectors to observe the
signal, which will be apparent in the cross-correlation of the detector
outputs. A corollar... | [
{
"created": "Fri, 13 Apr 2001 22:58:12 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Finn",
"Lee Samuel",
""
],
[
"Lazzarini",
"Albert",
""
]
] | Detecting a stationary, stochastic gravitational wave signal is complicated by impossibility of observing the detector noise independently of the signal. One consequence is that we require at least two detectors to observe the signal, which will be apparent in the cross-correlation of the detector outputs. A corollary ... |
1510.06245 | Alvin Chua | Alvin J. K. Chua, Jonathan R. Gair | Improved analytic extreme-mass-ratio inspiral model for scoping out
eLISA data analysis | 8 pages, 2 figures, accepted for publication as Fast Track
Communication in Classical and Quantum Gravity | Class. Quantum Grav. 32, 232002 (2015) | 10.1088/0264-9381/32/23/232002 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The space-based gravitational-wave detector eLISA has been selected as the
ESA L3 mission, and the mission design will be finalised by the end of this
decade. To prepare for mission formulation over the next few years, several
outstanding and urgent questions in data analysis will be addressed using mock
data challen... | [
{
"created": "Wed, 21 Oct 2015 13:32:10 GMT",
"version": "v1"
}
] | 2015-11-10 | [
[
"Chua",
"Alvin J. K.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | The space-based gravitational-wave detector eLISA has been selected as the ESA L3 mission, and the mission design will be finalised by the end of this decade. To prepare for mission formulation over the next few years, several outstanding and urgent questions in data analysis will be addressed using mock data challenge... |
gr-qc/0002042 | Michael Bradley | M Berg, M Bradley | Are Simple Real Pole Solutions Physical? | 13 pages, 3 figures | Phys.Scripta 62 (2000) 17-22 | 10.1238/Physica.Regular.062a00017 | null | gr-qc | null | We consider exact solutions generated by the inverse scattering technique,
also known as the soliton transformation. In particular, we study the class of
simple real pole solutions. For quite some time, those solutions have been
considered interesting as models of cosmological shock waves. A coordinate
singularity on... | [
{
"created": "Fri, 11 Feb 2000 18:17:55 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Berg",
"M",
""
],
[
"Bradley",
"M",
""
]
] | We consider exact solutions generated by the inverse scattering technique, also known as the soliton transformation. In particular, we study the class of simple real pole solutions. For quite some time, those solutions have been considered interesting as models of cosmological shock waves. A coordinate singularity on t... |
gr-qc/0011003 | Shahar Hod | Shahar Hod and Tsvi Piran | Cosmic Censorship: The Role of Quantum Gravity | 7 pages. This essay received the Second Prize from the Gravity
Research Foundation 2000 | Gen.Rel.Grav. 32 (2000) 2333-2338 | 10.1023/A:1002098800227 | null | gr-qc astro-ph hep-th quant-ph | null | The cosmic censorship hypothesis introduced by Penrose thirty years ago is
still one of the most important open questions in {\it classical} general
relativity. In this essay we put forward the idea that cosmic censorship is
intrinsically a {\it quantum gravity} phenomena. To that end we construct a
gedanken experime... | [
{
"created": "Wed, 1 Nov 2000 08:44:22 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Hod",
"Shahar",
""
],
[
"Piran",
"Tsvi",
""
]
] | The cosmic censorship hypothesis introduced by Penrose thirty years ago is still one of the most important open questions in {\it classical} general relativity. In this essay we put forward the idea that cosmic censorship is intrinsically a {\it quantum gravity} phenomena. To that end we construct a gedanken experiment... |
gr-qc/0201081 | Lorenzo Iorio | Lorenzo Iorio | Constraints to a Yukawa gravitational potential from laser data to
LAGEOS satellites | LaTex, no figures, no tables. To appear in Physics Letters A | Phys.Lett. A298 (2002) 315-318 | 10.1016/S0375-9601(02)00580-7 | null | gr-qc astro-ph hep-ph physics.space-ph | null | In this paper we investigate the possibility of constraining the hypothesis
of a fifth force at the length scale of two Earth's radii by investigating the
effects of a Yukawa gravitational potential on the orbits of the laser--ranged
LAGEOS satellites. The existing constraints on the Yukawa coupling $\alpha$,
obtaine... | [
{
"created": "Thu, 24 Jan 2002 14:09:34 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Apr 2002 14:18:47 GMT",
"version": "v2"
}
] | 2007-11-12 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we investigate the possibility of constraining the hypothesis of a fifth force at the length scale of two Earth's radii by investigating the effects of a Yukawa gravitational potential on the orbits of the laser--ranged LAGEOS satellites. The existing constraints on the Yukawa coupling $\alpha$, obtained ... |
2310.08438 | Lisa Valerie Drummond | Lisa V. Drummond, Philip Lynch, Alexandra G. Hanselman, Devin R.
Becker, Scott A. Hughes | Extreme mass-ratio inspiral and waveforms for a spinning body into a
Kerr black hole via osculating geodesics and near-identity transformations | 38 pages, including 17 pages of Appendices, 13 figures. Submitted to
Physics Review D. This posting and submission supersedes arXiv:2305.08919, in
response to helpful critical referee feedback | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Understanding the orbits of spinning bodies in curved spacetime is important
for modeling binary black hole systems with small mass ratios. At zeroth order
in mass ratio, the smaller body moves on a geodesic. Post-geodesic effects are
needed to model the system accurately. One very important post-geodesic effect
is t... | [
{
"created": "Thu, 12 Oct 2023 16:02:10 GMT",
"version": "v1"
}
] | 2023-10-13 | [
[
"Drummond",
"Lisa V.",
""
],
[
"Lynch",
"Philip",
""
],
[
"Hanselman",
"Alexandra G.",
""
],
[
"Becker",
"Devin R.",
""
],
[
"Hughes",
"Scott A.",
""
]
] | Understanding the orbits of spinning bodies in curved spacetime is important for modeling binary black hole systems with small mass ratios. At zeroth order in mass ratio, the smaller body moves on a geodesic. Post-geodesic effects are needed to model the system accurately. One very important post-geodesic effect is the... |
0810.5336 | Evan Ochsner | K.G. Arun, Alessandra Buonanno, Guillaume Faye, Evan Ochsner | Higher-order spin effects in the amplitude and phase of gravitational
waveforms emitted by inspiraling compact binaries: Ready-to-use gravitational
waveforms | 43 pages, 10 Postscript figures. submitted to Physical Review D.
Includes corrections due to errata | Phys.Rev.D79:104023,2009; Erratum-ibid.D84:049901,2011 | 10.1103/PhysRevD.79.104023 10.1103/PhysRevD.84.049901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide ready-to-use time-domain gravitational waveforms for spinning
compact binaries with precession effects through 1.5PN order in amplitude and
compute their mode decomposition using spin-weighted -2 spherical harmonics. In
the presence of precession, the gravitational-wave modes (l,m) contain
harmonics origin... | [
{
"created": "Wed, 29 Oct 2008 19:07:37 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jul 2011 16:19:53 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Jul 2011 22:19:16 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Arun",
"K. G.",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Ochsner",
"Evan",
""
]
] | We provide ready-to-use time-domain gravitational waveforms for spinning compact binaries with precession effects through 1.5PN order in amplitude and compute their mode decomposition using spin-weighted -2 spherical harmonics. In the presence of precession, the gravitational-wave modes (l,m) contain harmonics originat... |
gr-qc/9612008 | Martin Xavier | X. Martin and A. Vilenkin (Tufts University) | Gravitational radiation from monopoles connected by strings | 18 pages, RevTex and 2 postscript figures. Submitted to Phys. Rev. D | Phys.Rev.D55:6054-6060,1997 | 10.1103/PhysRevD.55.6054 | null | gr-qc | null | Monopole-antimonopole pairs connected by strings can be formed as topological
defects in a sequence of cosmological phase transitions. Such hybrid defects
typically decay early in the history of the universe but can still generate an
observable background of gravitational waves. We study the spectrum of
gravitational... | [
{
"created": "Mon, 2 Dec 1996 23:02:08 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Martin",
"X.",
"",
"Tufts University"
],
[
"Vilenkin",
"A.",
"",
"Tufts University"
]
] | Monopole-antimonopole pairs connected by strings can be formed as topological defects in a sequence of cosmological phase transitions. Such hybrid defects typically decay early in the history of the universe but can still generate an observable background of gravitational waves. We study the spectrum of gravitational r... |
gr-qc/0210021 | Francesco Belgiorno | F.Belgiorno | Quasi-Homogeneous Thermodynamics and Black Holes | 39 pages, uses RevteX. Published version (minor changes w.r.t. the
original one) | J.Math.Phys. 44 (2003) 1089-1128 | 10.1063/1.1542922 | null | gr-qc | null | We propose a generalized thermodynamics in which quasi-homogeneity of the
thermodynamic potentials plays a fundamental role. This thermodynamic formalism
arises from a generalization of the approach presented in paper [1], and it is
based on the requirement that quasi-homogeneity is a non-trivial symmetry for
the Pfa... | [
{
"created": "Mon, 7 Oct 2002 15:29:59 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Dec 2005 13:42:35 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Belgiorno",
"F.",
""
]
] | We propose a generalized thermodynamics in which quasi-homogeneity of the thermodynamic potentials plays a fundamental role. This thermodynamic formalism arises from a generalization of the approach presented in paper [1], and it is based on the requirement that quasi-homogeneity is a non-trivial symmetry for the Pfaff... |
1506.04382 | Muhammed Amir | Sushant G. Ghosh, Muhammed Amir | Horizon structure of rotating Bardeen black hole and particle
acceleration | 12 pages, 11 figures, 4 tables, few changes and references added,
accepted in EPJC | null | 10.1140/epjc/s10052-015-3786-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the horizon structure and ergosphere in a rotating Bardeen
regular black hole, which has an additional parameter ($g$) due to magnetic
charge, apart from mass ($M$) and rotation parameter ($a$). Interestingly, for
each value of parameter $g$, there exist a critical rotation parameter
($a=a_{E}$), which... | [
{
"created": "Sun, 14 Jun 2015 11:32:11 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Sep 2015 13:47:17 GMT",
"version": "v2"
},
{
"created": "Sun, 8 Nov 2015 13:30:29 GMT",
"version": "v3"
}
] | 2016-01-20 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Amir",
"Muhammed",
""
]
] | We investigate the horizon structure and ergosphere in a rotating Bardeen regular black hole, which has an additional parameter ($g$) due to magnetic charge, apart from mass ($M$) and rotation parameter ($a$). Interestingly, for each value of parameter $g$, there exist a critical rotation parameter ($a=a_{E}$), which c... |
2010.16183 | Hemwati Nandan | Shubham Kala, Hemwati Nandan, Prateek Sharma | Deflection of Light Around a Rotating BTZ Black Hole | null | Modern Physics Letters A 2050323 (2020) | 10.1142/S021773232050323X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a detailed study of gravitational lensing around a rotating BTZ
black hole in (2+1) dimensional gravity. The study of orbits for massless test
particle around this BH spacetime is performed to describe the nature of
cosmological constant in lower dimensions. We study the effect of cosmological
constant on ... | [
{
"created": "Fri, 30 Oct 2020 10:39:45 GMT",
"version": "v1"
}
] | 2020-11-02 | [
[
"Kala",
"Shubham",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Sharma",
"Prateek",
""
]
] | We present a detailed study of gravitational lensing around a rotating BTZ black hole in (2+1) dimensional gravity. The study of orbits for massless test particle around this BH spacetime is performed to describe the nature of cosmological constant in lower dimensions. We study the effect of cosmological constant on th... |
gr-qc/0004024 | Dumitru Baleanu | Dumitru Baleanu, Ayse Karasu | Lax Tensors, Killing Tensors and Geometric Duality | 9 pages LATEX | Mod.Phys.Lett. A14 (1999) 2597 | 10.1142/S0217732399002716 | null | gr-qc | null | The solution of the Lax tensor equations in the case
$L_{\alpha\beta\gamma}=-L_{\beta\alpha\gamma}$ was analyzed. The Lax tensors on
the dual metrics were investigated. We classified all two dimensional metrics
having the symmetric Lax tensor $L_{\alpha\beta\gamma}$. The Lax tensors of the
flat space, Rindler system ... | [
{
"created": "Sat, 8 Apr 2000 18:16:17 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Baleanu",
"Dumitru",
""
],
[
"Karasu",
"Ayse",
""
]
] | The solution of the Lax tensor equations in the case $L_{\alpha\beta\gamma}=-L_{\beta\alpha\gamma}$ was analyzed. The Lax tensors on the dual metrics were investigated. We classified all two dimensional metrics having the symmetric Lax tensor $L_{\alpha\beta\gamma}$. The Lax tensors of the flat space, Rindler system an... |
1710.10599 | T. Damour | Thibault Damour | High-energy gravitational scattering and the general relativistic
two-body problem | 25 pages, 5 figures | Phys. Rev. D 97, 044038 (2018) | 10.1103/PhysRevD.97.044038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A technique for translating the classical scattering function of two
gravitationally interacting bodies into a corresponding (effective one-body)
Hamiltonian description has been recently introduced [Phys.\ Rev.\ D {\bf 94},
104015 (2016)]. Using this technique, we derive, for the first time, to
second-order in Newto... | [
{
"created": "Sun, 29 Oct 2017 12:16:27 GMT",
"version": "v1"
}
] | 2018-03-07 | [
[
"Damour",
"Thibault",
""
]
] | A technique for translating the classical scattering function of two gravitationally interacting bodies into a corresponding (effective one-body) Hamiltonian description has been recently introduced [Phys.\ Rev.\ D {\bf 94}, 104015 (2016)]. Using this technique, we derive, for the first time, to second-order in Newton'... |
1703.09214 | Francesco De Martini | Francesco De Martini | The Higgs field and the resolution of the Cosmological Constant Paradox
in the Weyl geometrical Universe | Philosophical Transactions A of the Royal Society (2017) | null | 10.1098/rsta.2016.0388 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard electroweak theory of leptons and the conformal groups of
spacetime Weyl's transformations are at the core of a general relativistic,
conformally covariant scalar tensor theory aimed at the resolution of the most
intriguing enigma of modern Physics: the cosmological constant paradox
(hereafter: Lambda pa... | [
{
"created": "Sat, 25 Mar 2017 17:01:57 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Apr 2017 14:10:55 GMT",
"version": "v2"
},
{
"created": "Fri, 5 May 2017 19:27:39 GMT",
"version": "v3"
},
{
"created": "Sun, 3 Sep 2017 19:50:16 GMT",
"version": "v4"
},
{
"crea... | 2018-02-27 | [
[
"De Martini",
"Francesco",
""
]
] | The standard electroweak theory of leptons and the conformal groups of spacetime Weyl's transformations are at the core of a general relativistic, conformally covariant scalar tensor theory aimed at the resolution of the most intriguing enigma of modern Physics: the cosmological constant paradox (hereafter: Lambda para... |
gr-qc/0611066 | Kazuhiro Yamamoto | Hidenori Nomura, Misao Sasaki, Kazuhiro Yamamoto | Classical and quantum radiation from a moving charge in an expanding
universe | 16 pages, JCAP in press | JCAP 0611:013,2006 | 10.1088/1475-7516/2006/11/013 | HUPD-0613, YITP-06-60 | gr-qc | null | We investigate photon emission from a moving particle in an expanding
universe. This process is analogous to the radiation from an accelerated charge
in the classical electromagnetic theory. Using the framework of quantum field
theory in curved spacetime, we demonstrate that the Wentzel-Kramers-Brillouin
(WKB) approx... | [
{
"created": "Mon, 13 Nov 2006 09:16:21 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Nov 2006 07:10:20 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Nomura",
"Hidenori",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Yamamoto",
"Kazuhiro",
""
]
] | We investigate photon emission from a moving particle in an expanding universe. This process is analogous to the radiation from an accelerated charge in the classical electromagnetic theory. Using the framework of quantum field theory in curved spacetime, we demonstrate that the Wentzel-Kramers-Brillouin (WKB) approxim... |
0905.2974 | Sam Dolan Dr | Sam Dolan and Jonathan Gair | The massive Dirac field on a rotating black hole spacetime: Angular
solutions | 22 pages, 6 figures. Minor corrections, to match published version | Class.Quant.Grav.26:175020,2009 | 10.1088/0264-9381/26/17/175020 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The massive Dirac equation on a Kerr-Newman background may be solved by the
method of separation of variables. The radial and angular equations are coupled
via an angular eigenvalue, which is determined from the Chandrasekhar-Page (CP)
equation. Obtaining accurate angular eigenvalues is a key step in studying
scatter... | [
{
"created": "Mon, 18 May 2009 20:15:34 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Aug 2009 01:30:18 GMT",
"version": "v2"
}
] | 2010-03-25 | [
[
"Dolan",
"Sam",
""
],
[
"Gair",
"Jonathan",
""
]
] | The massive Dirac equation on a Kerr-Newman background may be solved by the method of separation of variables. The radial and angular equations are coupled via an angular eigenvalue, which is determined from the Chandrasekhar-Page (CP) equation. Obtaining accurate angular eigenvalues is a key step in studying scatterin... |
2010.15019 | Rio Saitou | Rio Saitou and Hiromi Saida | Light deflection in Observation: Angle differences between two null
geodesics on the de Sitter spacetime with multi-lensing objects | 9 pages, 2 figures, Affiliation and e-mail addresses are just added | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive angle differences between two null geodesics, propagating from
light sources to an observer, on the de Sitter spacetime with multi-lensing
objects. Assuming the lensing objects are mass monopoles on the de Sitter
background, we derive the metric tensor by solving the Einstein equation
perturbatively. On tha... | [
{
"created": "Wed, 28 Oct 2020 14:52:04 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Oct 2020 10:42:52 GMT",
"version": "v2"
}
] | 2020-10-30 | [
[
"Saitou",
"Rio",
""
],
[
"Saida",
"Hiromi",
""
]
] | We derive angle differences between two null geodesics, propagating from light sources to an observer, on the de Sitter spacetime with multi-lensing objects. Assuming the lensing objects are mass monopoles on the de Sitter background, we derive the metric tensor by solving the Einstein equation perturbatively. On that ... |
1107.5650 | Thomas M\"uller | Thomas M\"uller and Daniel Weiskopf | Detailed study of null and time-like geodesics in the Alcubierre Warp
spacetime | null | null | 10.1007/s10714-011-1289-0 | null | gr-qc physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Alcubierre warp spacetime yields a fascinating chance for comfortable
interstellar travel between arbitrary distant places without the time dilation
effect as in special relativistic flights. Even though the warp spacetime needs
exotic matter for its construction and is thus far from being physically
feasible, it... | [
{
"created": "Thu, 28 Jul 2011 08:59:51 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Müller",
"Thomas",
""
],
[
"Weiskopf",
"Daniel",
""
]
] | The Alcubierre warp spacetime yields a fascinating chance for comfortable interstellar travel between arbitrary distant places without the time dilation effect as in special relativistic flights. Even though the warp spacetime needs exotic matter for its construction and is thus far from being physically feasible, it o... |
gr-qc/9710109 | Clement Gerard | Gerard Clement | From Schwarzschild to Kerr: Generating spinning Einstein-maxwell fields
from static fields | 8 pages, Latex | Phys.Rev. D57 (1998) 4885-4889 | 10.1103/PhysRevD.57.4885 | DF-UFES 002/97 | gr-qc hep-th | null | The Kerr solution is generated from the Schwarzschild solution by a simple
combination of real global coordinate transformations and of invariance
transformations acting on the space of stationary solutions of the
Einstein-Maxwell equations. The same transformation can be used to generate a
spinning field configurati... | [
{
"created": "Thu, 23 Oct 1997 18:52:54 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Clement",
"Gerard",
""
]
] | The Kerr solution is generated from the Schwarzschild solution by a simple combination of real global coordinate transformations and of invariance transformations acting on the space of stationary solutions of the Einstein-Maxwell equations. The same transformation can be used to generate a spinning field configuration... |
gr-qc/0601015 | Ignazio Ciufolini | Ignazio Ciufolini and Erricos Pavlis | On the Measurement of the Lense-Thirring effect Using the Nodes of the
LAGEOS Satellites in reply to "On the reliability of the so-far performed
tests for measuring the Lense-Thirring effect with the LAGEOS satellites" by
L. Iorio | Added: the precise references to the the ArXiv papers of L. Iorio:
gr-qc/0411024 v9 19 Apr 2005 and gr-qc/0411084 v5 19 Apr 2005, explicitly
containing his proposal to use the mean anomaly | New Astron. 10 (2005) 636-651 | 10.1016/j.newast.2005.04.003 | null | gr-qc | null | In this paper, we provide a detailed description of our recent analysis and
determination of the frame-dragging effect obtained using the nodes of the
satellites LAGEOS and LAGEOS 2, in reply to the paper "On the reliability of
the so-far performed tests for measuring the Lense-Thirring effect with the
LAGEOS satelli... | [
{
"created": "Wed, 4 Jan 2006 19:22:22 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ciufolini",
"Ignazio",
""
],
[
"Pavlis",
"Erricos",
""
]
] | In this paper, we provide a detailed description of our recent analysis and determination of the frame-dragging effect obtained using the nodes of the satellites LAGEOS and LAGEOS 2, in reply to the paper "On the reliability of the so-far performed tests for measuring the Lense-Thirring effect with the LAGEOS satellite... |
gr-qc/0203052 | Johannes Ruoff | Johannes Ruoff, Adamantios Stavridis, Kostas D. Kokkotas | Inertial modes of slowly rotating relativistic stars in the Cowling
approximation | 18 pages, 4 figures, MNRAS typesetting | Mon.Not.Roy.Astron.Soc.339:1170,2003 | 10.1046/j.1365-8711.2003.06267.x | null | gr-qc astro-ph | null | We study oscillations of slowly rotating relativistic barotropic as well as
non-barotropic polytropic stars in the Cowling approximation, including first
order rotational corrections. By taking into account the coupling between the
polar and axial equations, we find that, in contrast to previous results, the
$m=2$ $r... | [
{
"created": "Thu, 14 Mar 2002 15:46:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ruoff",
"Johannes",
""
],
[
"Stavridis",
"Adamantios",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | We study oscillations of slowly rotating relativistic barotropic as well as non-barotropic polytropic stars in the Cowling approximation, including first order rotational corrections. By taking into account the coupling between the polar and axial equations, we find that, in contrast to previous results, the $m=2$ $r$ ... |
gr-qc/9704025 | Vitorio Alberto De Lorenci | M. Novello and V. A. De Lorenci | The Binary Pulsar Is Not the Ultimate Test for the Theory of Gravity | 14 pages, LaTex, no figures | null | null | CBPF-NF-025/97 | gr-qc | null | General relativity can be formulated either as in its original geometrical
version (Einstein, 1915) or as a field theory (Feynman, 1962). In the Feynman
presentation of Einstein theory an hypothesis concerning the interaction of
gravity to gravity, which was hidden in the original version, becomes explicit.
This is n... | [
{
"created": "Tue, 8 Apr 1997 19:48:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Novello",
"M.",
""
],
[
"De Lorenci",
"V. A.",
""
]
] | General relativity can be formulated either as in its original geometrical version (Einstein, 1915) or as a field theory (Feynman, 1962). In the Feynman presentation of Einstein theory an hypothesis concerning the interaction of gravity to gravity, which was hidden in the original version, becomes explicit. This is not... |
1110.1223 | Georgios Kraniotis | G. V. Kraniotis | Exact deflection of a Neutral-Tachyon in the Kerr's Gravitational field | 8 pages | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve in closed analytic form space-like geodesic equations in the Kerr
gravitational field. Such geodesic equations describe the motion of neutral
tachyons (faster than light particles) in the Kerr spacetime. More specifically
we derive the closed form solution for the deflection angle of a neutral
tachyon on an ... | [
{
"created": "Thu, 6 Oct 2011 11:04:11 GMT",
"version": "v1"
}
] | 2011-10-13 | [
[
"Kraniotis",
"G. V.",
""
]
] | We solve in closed analytic form space-like geodesic equations in the Kerr gravitational field. Such geodesic equations describe the motion of neutral tachyons (faster than light particles) in the Kerr spacetime. More specifically we derive the closed form solution for the deflection angle of a neutral tachyon on an eq... |
1507.05878 | Kalin Staykov | Kalin Staykov, K. Yavuz Ek\c{s}i, Stoytcho S. Yazadjiev, M. Metehan
T\"urko\u{g}lu, A. Sava\c{s} Arapo\u{g}lu | Moment of inertia of neutron star crust in alternative and modified
theories of gravity | 8 pages, 3 figures, v2 matches version published on Phys. Rev. D | Phys. Rev. D 94, 024056 (2016) | 10.1103/PhysRevD.94.024056 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The glitch activity of young pulsars arises from the exchange of angular
momentum between the crust and the interior of the star. Recently, it was
inferred that the moment of inertia of the crust of a neutron star is not
sufficient to explain the observed glitches. Such estimates are presumed in the
Einstein's genera... | [
{
"created": "Tue, 21 Jul 2015 15:44:53 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Aug 2016 12:43:51 GMT",
"version": "v2"
}
] | 2016-08-02 | [
[
"Staykov",
"Kalin",
""
],
[
"Ekşi",
"K. Yavuz",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
],
[
"Türkoğlu",
"M. Metehan",
""
],
[
"Arapoğlu",
"A. Savaş",
""
]
] | The glitch activity of young pulsars arises from the exchange of angular momentum between the crust and the interior of the star. Recently, it was inferred that the moment of inertia of the crust of a neutron star is not sufficient to explain the observed glitches. Such estimates are presumed in the Einstein's general ... |
gr-qc/0610155 | Marc-Thierry Jaekel | Marc-Thierry Jaekel (LPTENS), Serge Reynaud (LKB - Jussieu) | Radar ranging and Doppler tracking in post-Einsteinian metric theories
of gravity | 15 pages | Class.Quant.Grav. 23 (2006) 7561 | 10.1088/0264-9381/23/24/025 | null | gr-qc | null | The study of post-Einsteinian metric extensions of general relativity (GR),
which preserve the metric interpretation of gravity while considering metrics
which may differ from that predicted by GR, is pushed one step further. We give
a complete description of radar ranging and Doppler tracking in terms of the
time de... | [
{
"created": "Mon, 30 Oct 2006 19:25:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jaekel",
"Marc-Thierry",
"",
"LPTENS"
],
[
"Reynaud",
"Serge",
"",
"LKB - Jussieu"
]
] | The study of post-Einsteinian metric extensions of general relativity (GR), which preserve the metric interpretation of gravity while considering metrics which may differ from that predicted by GR, is pushed one step further. We give a complete description of radar ranging and Doppler tracking in terms of the time dela... |
1612.05725 | Xinhe Meng | Deng Wang, Xin-He Meng | Wormholes from cosmological reconstruction based on Gaussian processes | null | Phys.Dark Univ. 16 (2017) 81-86 | 10.1016/j.dark.2017.04.006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the model-independent traversable wormholes from cosmological
reconstruction based on Gaussian processes (GP). Using a combination of Union
2.1 SNe Ia data, the latest observational Hubble parameter data and recent
Planck's shift parameter, we find that our GP method can give a tighter
constraint on the norm... | [
{
"created": "Sat, 17 Dec 2016 09:27:51 GMT",
"version": "v1"
}
] | 2017-05-30 | [
[
"Wang",
"Deng",
""
],
[
"Meng",
"Xin-He",
""
]
] | We study the model-independent traversable wormholes from cosmological reconstruction based on Gaussian processes (GP). Using a combination of Union 2.1 SNe Ia data, the latest observational Hubble parameter data and recent Planck's shift parameter, we find that our GP method can give a tighter constraint on the normal... |
1809.05329 | Yan Peng | Yan Peng | Hair formation in the background of noncommutative reflecting stars | 12 pages, 4 figures | Nuclear Physics B 938 (2019) 143-153 | 10.1016/j.nuclphysb.2018.11.008 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate scalar condensations around noncommutative compact reflecting
stars. We find that the neutral noncommutative reflecting star cannot support
the existence of scalar field hairs. In the charged noncommutative reflecting
star spacetime, we provide upper bounds for star radii. Above the bound, scalar
field... | [
{
"created": "Fri, 14 Sep 2018 09:48:49 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Nov 2018 13:42:24 GMT",
"version": "v2"
}
] | 2018-11-20 | [
[
"Peng",
"Yan",
""
]
] | We investigate scalar condensations around noncommutative compact reflecting stars. We find that the neutral noncommutative reflecting star cannot support the existence of scalar field hairs. In the charged noncommutative reflecting star spacetime, we provide upper bounds for star radii. Above the bound, scalar fields ... |
1607.02316 | Vartika Gupta | Daksh Lohiya and Vartika Gupta | Non - Topological Solitons in a Non-minimally Coupled Scalar Field
Induced Gravity Theory | 27 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Properties of soliton stars that could be expected to naturally arise out of
a first order phase transition in non-minimally coupled scalar-field-induced
gravity theories are investigated. Of particular interest are configurations,
similar to Lee-Wick stars, with vanishing effective gravitational constant in
the inte... | [
{
"created": "Fri, 8 Jul 2016 11:12:50 GMT",
"version": "v1"
}
] | 2016-07-11 | [
[
"Lohiya",
"Daksh",
""
],
[
"Gupta",
"Vartika",
""
]
] | Properties of soliton stars that could be expected to naturally arise out of a first order phase transition in non-minimally coupled scalar-field-induced gravity theories are investigated. Of particular interest are configurations, similar to Lee-Wick stars, with vanishing effective gravitational constant in the interi... |
gr-qc/9802040 | Konstantinov Mikhail | M. Yu. Konstantinov | Causality properties of topologically nontrivial space-time models | 7 pages, LaTeX; Talk presented at the International School-Seminar
"Problems of Theoretical Cosmology", Ulyanovsk, September 1--7, 1997 | Grav.Cosmol.3:299-304,1997 | null | RGS-VNIIMS-002/98 | gr-qc | null | Some problems of the space-time causal structure are discussed using models
with traversable wormholes. For this purpose the conditions of traversable
wormhole matching with the exterior space-time are considered in detail and a
mixed boundary problem for the Einstein equations is formulated and analyzed.
The influen... | [
{
"created": "Tue, 17 Feb 1998 14:19:05 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Konstantinov",
"M. Yu.",
""
]
] | Some problems of the space-time causal structure are discussed using models with traversable wormholes. For this purpose the conditions of traversable wormhole matching with the exterior space-time are considered in detail and a mixed boundary problem for the Einstein equations is formulated and analyzed. The influence... |
gr-qc/0406004 | Robert Carroll | Robert Carroll | Gravity and the quantum potential | Latex, 30 pages, Remark added | null | null | null | gr-qc | null | We review some material connecting gravity and the quantum potential and
provide a few new observations.
| [
{
"created": "Wed, 2 Jun 2004 12:00:40 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 2004 23:33:53 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Carroll",
"Robert",
""
]
] | We review some material connecting gravity and the quantum potential and provide a few new observations. |
1512.01317 | Taeyoon Moon | Yun Soo Myung, Taeyoon Moon, and Young-Jai Park | Einstein-singleton theory and its power spectra in de Sitter inflation | 1+15 pages, 3 figures, version to appear in Int. J. Mod. Phys. D | null | 10.1142/S0218271816501078 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Einstein-singleton theory during de Sitter inflation since it
provides a way of degenerate fourth-order scalar theory. We obtain an exact
solution expressed in terms of the exponential-integral function by solving the
degenerate fourth-order scalar equation in de Sitter spacetime. Furthermore, we
find th... | [
{
"created": "Fri, 4 Dec 2015 05:03:11 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jun 2016 03:17:24 GMT",
"version": "v2"
}
] | 2017-01-25 | [
[
"Myung",
"Yun Soo",
""
],
[
"Moon",
"Taeyoon",
""
],
[
"Park",
"Young-Jai",
""
]
] | We study the Einstein-singleton theory during de Sitter inflation since it provides a way of degenerate fourth-order scalar theory. We obtain an exact solution expressed in terms of the exponential-integral function by solving the degenerate fourth-order scalar equation in de Sitter spacetime. Furthermore, we find that... |
1503.07437 | Abril Su\'arez | Abril Su\'arez and Pierre-Henri Chavanis | Hydrodynamic representation of the Klein-Gordon-Einstein equations in
the weak field limit: I. General formalism and perturbations analysis | 29 pages, 11 figures | Phys. Rev. D 92, 023510 (2015) | 10.1103/PhysRevD.92.023510 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a generalization of the Madelung transformation, we derive the
hydrodynamic representation of the Klein-Gordon-Einstein equations in the weak
field limit. We consider a complex self-interacting scalar field with a
$\lambda|\varphi|^4$ potential. We study the evolution of the homogeneous
background in the fluid ... | [
{
"created": "Tue, 24 Mar 2015 14:23:54 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Dec 2015 15:24:25 GMT",
"version": "v2"
}
] | 2015-12-09 | [
[
"Suárez",
"Abril",
""
],
[
"Chavanis",
"Pierre-Henri",
""
]
] | Using a generalization of the Madelung transformation, we derive the hydrodynamic representation of the Klein-Gordon-Einstein equations in the weak field limit. We consider a complex self-interacting scalar field with a $\lambda|\varphi|^4$ potential. We study the evolution of the homogeneous background in the fluid re... |
1712.09903 | Roberto Percacci | R. Percacci | Unimodular quantum gravity and the cosmological constant | Prepared for the proceedings of the workshop "Black holes,
gravitational waves and spacetime singularities", held at the Vatican
Observatory, Castel Gandolfo (Rome) May 9 - 12, 2017 | null | 10.1007/s10701-018-0189-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the one-loop effective action of unimodular gravity is the
same as that of ordinary gravity, restricted to unimodular metrics. The only
difference is in the treatment of the global scale degree of freedom and of the
cosmological term. A constant vacuum energy does not gravitate, addressing one
aspect... | [
{
"created": "Thu, 28 Dec 2017 15:39:52 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Percacci",
"R.",
""
]
] | It is shown that the one-loop effective action of unimodular gravity is the same as that of ordinary gravity, restricted to unimodular metrics. The only difference is in the treatment of the global scale degree of freedom and of the cosmological term. A constant vacuum energy does not gravitate, addressing one aspect o... |
1401.5397 | Hor\'acio Santana Vieira | H. S. Vieira, V. B. Bezerra, C. R. Muniz | Exact solutions of the Klein-Gordon equation in the Kerr-Newman
background and Hawking radiation | 25 pages | Annals of Physics 350 (2014) 14-28 | 10.1016/j.aop.2014.07.011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work considers the influence of the gravitational field produced by a
charged and rotating black hole (Kerr-Newman spacetime) on a charged massive
scalar field. We obtain exact solutions of both angular and radial parts of the
Klein-Gordon equation in this spacetime, which are given in terms of the
confluent Heu... | [
{
"created": "Tue, 21 Jan 2014 17:35:11 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Feb 2014 22:16:01 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Apr 2014 21:05:48 GMT",
"version": "v3"
},
{
"created": "Thu, 31 Jul 2014 14:08:43 GMT",
"version": "v4"
}
] | 2014-08-01 | [
[
"Vieira",
"H. S.",
""
],
[
"Bezerra",
"V. B.",
""
],
[
"Muniz",
"C. R.",
""
]
] | This work considers the influence of the gravitational field produced by a charged and rotating black hole (Kerr-Newman spacetime) on a charged massive scalar field. We obtain exact solutions of both angular and radial parts of the Klein-Gordon equation in this spacetime, which are given in terms of the confluent Heun ... |
2308.07299 | Leonardo Giuliano Trombetta | Juan Manuel Armaleo, Sebastian Bahamonde, Georg Trenkler, Leonardo G.
Trombetta | Symmetric Teleparallel Gauss-Bonnet Gravity and its Extensions | 23 pages | Phys.Rev.D 108, 104019 (2023) | 10.1103/PhysRevD.108.104019 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Teleparallel theories assume that curvature is vanishing in which
case gravity can be solely represented by torsion and/or nonmetricity. Using
differential form language, we express the Riemannian Gauss-Bonnet invariant
concisely in terms of two General Teleparallel Gauss-Bonnet invariants, a bulk
and a bound... | [
{
"created": "Mon, 14 Aug 2023 17:36:53 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Nov 2023 18:12:11 GMT",
"version": "v2"
}
] | 2023-11-13 | [
[
"Armaleo",
"Juan Manuel",
""
],
[
"Bahamonde",
"Sebastian",
""
],
[
"Trenkler",
"Georg",
""
],
[
"Trombetta",
"Leonardo G.",
""
]
] | General Teleparallel theories assume that curvature is vanishing in which case gravity can be solely represented by torsion and/or nonmetricity. Using differential form language, we express the Riemannian Gauss-Bonnet invariant concisely in terms of two General Teleparallel Gauss-Bonnet invariants, a bulk and a boundar... |
1911.03736 | Wei-Chen Lin | Wei-Chen Lin, William H. Kinney | Trans-Planckian Censorship and $k$-inflation | 9 pages, 4 figures. (V3: The version accepted by PRD. With a major
revision and figures replaced.) | Phys. Rev. D 101, 123534 (2020) | 10.1103/PhysRevD.101.123534 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a more general version of the Trans-Planckian Censorship
Conjecture (TCC) which can apply to models of inflation with varying speed of
sound. We find that inflation models with $c_S < 1$ are in general more
strongly constrained by censorship of trans-Planckian modes than canonical
inflation models, with th... | [
{
"created": "Sat, 9 Nov 2019 17:02:46 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2019 17:04:12 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Jun 2020 16:34:23 GMT",
"version": "v3"
}
] | 2020-07-08 | [
[
"Lin",
"Wei-Chen",
""
],
[
"Kinney",
"William H.",
""
]
] | We propose a more general version of the Trans-Planckian Censorship Conjecture (TCC) which can apply to models of inflation with varying speed of sound. We find that inflation models with $c_S < 1$ are in general more strongly constrained by censorship of trans-Planckian modes than canonical inflation models, with the ... |
1806.00648 | Javier Olmedo | Abhay Ashtekar, Javier Olmedo and Parampreet Singh | Quantum Transfiguration of Kruskal Black Holes | 5 pages, 1 figure, minor changes, version to appear in PRL | Phys. Rev. Lett. 121, 241301 (2018) | 10.1103/PhysRevLett.121.241301 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new effective description of macroscopic Kruskal black holes
that incorporates corrections due to quantum geometry effects of loop quantum
gravity. It encompasses both the `interior' region that contains classical
singularities and the `exterior' asymptotic region. Singularities are naturally
resolved by... | [
{
"created": "Sat, 2 Jun 2018 15:01:34 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2018 20:17:33 GMT",
"version": "v2"
}
] | 2018-12-19 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Singh",
"Parampreet",
""
]
] | We present a new effective description of macroscopic Kruskal black holes that incorporates corrections due to quantum geometry effects of loop quantum gravity. It encompasses both the `interior' region that contains classical singularities and the `exterior' asymptotic region. Singularities are naturally resolved by t... |
gr-qc/9706071 | Wang Anzhong | M.F.A. da Silva, Anzhong Wang, and N.O. Santos | On the sources of static plane symmetric vacuum space-times | null | Phys.Lett.A244:462-466,1998 | 10.1016/S0375-9601(98)00355-7 | null | gr-qc | null | The static vacuum plane spacetimes are considered, which have two non-trivial
solutions: The Taub solution and the Rindler solution. Imposed reflection
symmetry, we find that the source for the Taub solution does not satisfy any
energy conditions, which is consistent with previous studies, while the source
for the Ri... | [
{
"created": "Mon, 23 Jun 1997 20:06:20 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"da Silva",
"M. F. A.",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Santos",
"N. O.",
""
]
] | The static vacuum plane spacetimes are considered, which have two non-trivial solutions: The Taub solution and the Rindler solution. Imposed reflection symmetry, we find that the source for the Taub solution does not satisfy any energy conditions, which is consistent with previous studies, while the source for the Rind... |
1610.09181 | Norbert Klein | Norbert Klein | Are gravitational constant measurement discrepancies linked to galaxy
rotation curves ? | 9 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1504.07622 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discrepancies between recently reported experimental values of the
gravitational constant were analysed within an inertia interpretation of MOND
theory. According to this scenario the relative gravitational acceleration
between a test mass and an array of source masses determines the magnitude of
post Newtonian c... | [
{
"created": "Fri, 28 Oct 2016 12:05:58 GMT",
"version": "v1"
}
] | 2016-10-31 | [
[
"Klein",
"Norbert",
""
]
] | The discrepancies between recently reported experimental values of the gravitational constant were analysed within an inertia interpretation of MOND theory. According to this scenario the relative gravitational acceleration between a test mass and an array of source masses determines the magnitude of post Newtonian cor... |
2405.12928 | Peter Horvathy | P.-M. Zhang (SYSU, Zhuhai) and P. A. Horvathy (Tours) | Displacement within velocity effect in gravitational wave memory | 29 pages, 21 figures, with Appendix contributed by J. Balog | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Particles initially at rest hit by a passing sandwich gravitational wave
exhibit, in general, thevelocity memory effect (VM): they fly apart with
constant velocity. For specific values of the wave parameters their motion can
however become pure displacement (DM) as suggested by Zel'dovich and Polnarev.
For such a ``m... | [
{
"created": "Tue, 21 May 2024 16:53:07 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 2024 16:44:57 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Jul 2024 12:33:37 GMT",
"version": "v3"
}
] | 2024-07-09 | [
[
"Zhang",
"P. -M.",
"",
"SYSU, Zhuhai"
],
[
"Horvathy",
"P. A.",
"",
"Tours"
]
] | Particles initially at rest hit by a passing sandwich gravitational wave exhibit, in general, thevelocity memory effect (VM): they fly apart with constant velocity. For specific values of the wave parameters their motion can however become pure displacement (DM) as suggested by Zel'dovich and Polnarev. For such a ``mir... |
gr-qc/9511052 | Eric Hirschmann | Eric W. Hirschmann, Douglas M. Eardley | Criticality and Bifurcation in the Gravitational Collapse of a
Self-Coupled Scalar Field | 18 pages; one figure, uuencoded postscript; figure is also available
at http://www.physics.ucsb.edu/people/eric_hirschmann | Phys.Rev.D56:4696-4705,1997 | 10.1103/PhysRevD.56.4696 | NSF-ITP-95-154 | gr-qc | null | We examine the gravitational collapse of a non-linear sigma model in
spherical symmetry. There exists a family of continuously self-similar
solutions parameterized by the coupling constant of the theory. These solutions
are calculated together with the critical exponents for black hole formation of
these collapse mod... | [
{
"created": "Sat, 18 Nov 1995 00:06:56 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Hirschmann",
"Eric W.",
""
],
[
"Eardley",
"Douglas M.",
""
]
] | We examine the gravitational collapse of a non-linear sigma model in spherical symmetry. There exists a family of continuously self-similar solutions parameterized by the coupling constant of the theory. These solutions are calculated together with the critical exponents for black hole formation of these collapse model... |
2008.11022 | Farook Rahaman | Monimala Mondal, Parthapratim Pradhan, Farook Rahaman and Indrani
Karar | Geodesic stability and Quasi normal modes via Lyapunov exponent for
Hayward Black Hole | To appear in Mod.Phys.Lett.A, 19 pages and 6 figures | null | 10.1142/S0217732320502491 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive proper-time Lyapunov exponent $(\lambda_{p})$ and coordinate-time
Lyapunov exponent $(\lambda_{c})$ for a regular Hayward class of black hole.
The proper-time corresponds to $\tau$ and the coordinate time corresponds to
$t$. Where $t$ is measured by the asymptotic observers both for for Hayward
black hole a... | [
{
"created": "Sun, 23 Aug 2020 14:44:23 GMT",
"version": "v1"
}
] | 2020-08-26 | [
[
"Mondal",
"Monimala",
""
],
[
"Pradhan",
"Parthapratim",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Karar",
"Indrani",
""
]
] | We derive proper-time Lyapunov exponent $(\lambda_{p})$ and coordinate-time Lyapunov exponent $(\lambda_{c})$ for a regular Hayward class of black hole. The proper-time corresponds to $\tau$ and the coordinate time corresponds to $t$. Where $t$ is measured by the asymptotic observers both for for Hayward black hole and... |
0706.0923 | Milton Ruiz | Milton Ruiz, Miguel Alcubierre, Dario Nunez | Regularization of spherical and axisymmetric evolution codes in
numerical relativity | 11 pages, 9 figures. Several changes. Main corrections are in eqs.
(2.12) and (5.14). Accepted in Gen. Rel. Grav | Gen.Rel.Grav.40:159-182,2008 | 10.1007/s10714-007-0522-3 | null | gr-qc | null | Several interesting astrophysical phenomena are symmetric with respect to the
rotation axis, like the head-on collision of compact bodies, the collapse
and/or accretion of fields with a large variety of geometries, or some forms of
gravitational waves. Most current numerical relativity codes, however, can not
take ad... | [
{
"created": "Wed, 6 Jun 2007 21:49:26 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Sep 2007 22:40:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ruiz",
"Milton",
""
],
[
"Alcubierre",
"Miguel",
""
],
[
"Nunez",
"Dario",
""
]
] | Several interesting astrophysical phenomena are symmetric with respect to the rotation axis, like the head-on collision of compact bodies, the collapse and/or accretion of fields with a large variety of geometries, or some forms of gravitational waves. Most current numerical relativity codes, however, can not take adva... |
0708.3037 | Eric Poisson | Adam Pound and Eric Poisson | Multi-scale analysis of the electromagnetic self-force in a weak
gravitational field | 17 pages, 6 figures, final version to be published in Physical Review
D | Phys.Rev.D77:044012,2008 | 10.1103/PhysRevD.77.044012 | null | gr-qc | null | We examine the motion of a charged particle in a weak gravitational field. In
addition to the Newtonian gravity exerted by a large central body, the particle
is subjected to an electromagnetic self-force that contains both a conservative
piece and a radiation-reaction piece. This toy problem shares many of the
featur... | [
{
"created": "Wed, 22 Aug 2007 15:24:58 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Dec 2007 20:49:14 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pound",
"Adam",
""
],
[
"Poisson",
"Eric",
""
]
] | We examine the motion of a charged particle in a weak gravitational field. In addition to the Newtonian gravity exerted by a large central body, the particle is subjected to an electromagnetic self-force that contains both a conservative piece and a radiation-reaction piece. This toy problem shares many of the features... |
1105.6153 | Qiyuan Pan | Qiyuan Pan, Jiliang Jing and Bin Wang | Analytical investigation of the phase transition between holographic
insulator and superconductor in Gauss-Bonnet gravity | 18 pages, 1 figure, 3 tables | JHEP 11 (2011) 088 | 10.1007/JHEP11(2011)088 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ the variational method for the Sturm-Liouville eigenvalue problem
to analytically study the phase transition between the holographic insulator
and superconductor in the Gauss-Bonnet gravity. By investigating the s-wave and
p-wave holographic insulator/superconductor models, we find that this analytic
method... | [
{
"created": "Tue, 31 May 2011 03:04:49 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Nov 2011 06:47:26 GMT",
"version": "v2"
}
] | 2011-11-22 | [
[
"Pan",
"Qiyuan",
""
],
[
"Jing",
"Jiliang",
""
],
[
"Wang",
"Bin",
""
]
] | We employ the variational method for the Sturm-Liouville eigenvalue problem to analytically study the phase transition between the holographic insulator and superconductor in the Gauss-Bonnet gravity. By investigating the s-wave and p-wave holographic insulator/superconductor models, we find that this analytic method i... |
2105.08936 | Masato Minamitsuji | Masato Minamitsuji | Black holes in the quadratic-order extended vector-tensor theories | 15 pages | Classical and Quantum Gravity 38,105011 (2021) | 10.1088/1361-6382/abed62 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the static and spherically black hole solutions in the
quadratic-order extended vector-tensor theories without suffering from the
Ostrogradsky instabilities, which include the quartic-order
(beyond-)generalized Proca theories as the subclass. We start from the most
general action of the vector-tensor t... | [
{
"created": "Wed, 19 May 2021 05:54:40 GMT",
"version": "v1"
}
] | 2021-05-20 | [
[
"Minamitsuji",
"Masato",
""
]
] | We investigate the static and spherically black hole solutions in the quadratic-order extended vector-tensor theories without suffering from the Ostrogradsky instabilities, which include the quartic-order (beyond-)generalized Proca theories as the subclass. We start from the most general action of the vector-tensor the... |
1401.5898 | Sanjit Mitra | Nairwita Mazumder, Sanjit Mitra and Sanjeev Dhurandhar | Astrophysical motivation for directed searches for a stochastic
gravitational wave background | 13 pages, 2 figures, 3 tables. Matched the published version | Phys. Rev. D 89, 084076 (2014) | 10.1103/PhysRevD.89.084076 | IUCAA-02/14, LIGO-P1300223 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nearby universe is expected to create an anisotropic stochastic
gravitational wave background (SGWB). Different algorithms have been developed
and implemented to search for isotropic and anisotropic SGWB. The aim of this
paper is to quantify the advantage of an optimal anisotropic search,
specifically comparing a... | [
{
"created": "Thu, 23 Jan 2014 09:15:30 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jan 2014 04:58:06 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Apr 2014 09:17:33 GMT",
"version": "v3"
}
] | 2014-05-07 | [
[
"Mazumder",
"Nairwita",
""
],
[
"Mitra",
"Sanjit",
""
],
[
"Dhurandhar",
"Sanjeev",
""
]
] | The nearby universe is expected to create an anisotropic stochastic gravitational wave background (SGWB). Different algorithms have been developed and implemented to search for isotropic and anisotropic SGWB. The aim of this paper is to quantify the advantage of an optimal anisotropic search, specifically comparing a p... |
2009.12846 | Yu-Xiao Liu | Wen-Bin Feng, Si-Jiang Yang, Qin Tan, Jie Yang, Yu-Xiao Liu | Overcharging a Reissner-Nordstr\"om Taub-NUT regular black hole | 22 pages, 3 figures | Sci.China Phys.Mech.Astron. 64 (2021) 6, 260411 | 10.1007/s11433-020-1659-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The destruction of a regular black hole event horizon might provide us the
possibility to access regions inside black hole event horizon. This paper
investigates the possibility of overcharging a charged Taub-NUT regular black
hole via the scattering of a charged field and the absorption of a charged
particle. For th... | [
{
"created": "Sun, 27 Sep 2020 13:54:39 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Nov 2020 02:20:52 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Apr 2022 03:19:48 GMT",
"version": "v3"
}
] | 2022-04-29 | [
[
"Feng",
"Wen-Bin",
""
],
[
"Yang",
"Si-Jiang",
""
],
[
"Tan",
"Qin",
""
],
[
"Yang",
"Jie",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The destruction of a regular black hole event horizon might provide us the possibility to access regions inside black hole event horizon. This paper investigates the possibility of overcharging a charged Taub-NUT regular black hole via the scattering of a charged field and the absorption of a charged particle. For the ... |
1601.08106 | Moritz Reintjes | Moritz Reintjes | A note on incompressibility of relativistic fluids and the instantaneity
of their pressures | 7 pages. Version 2: Improved wording and presentation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a natural notion of incompressibility for fluids governed by the
relativistic Euler equations on a fixed background spacetime, and show that the
resulting equations reduce to the incompressible Euler equations in the
classical limit as $c\rightarrow \infty$. As our main result, we prove that the
fluid pr... | [
{
"created": "Fri, 29 Jan 2016 13:53:45 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jun 2017 11:33:20 GMT",
"version": "v2"
}
] | 2017-06-15 | [
[
"Reintjes",
"Moritz",
""
]
] | We introduce a natural notion of incompressibility for fluids governed by the relativistic Euler equations on a fixed background spacetime, and show that the resulting equations reduce to the incompressible Euler equations in the classical limit as $c\rightarrow \infty$. As our main result, we prove that the fluid pres... |
1412.5531 | Miguel Campiglia | Miguel Campiglia | Note on the phase space of asymptotically flat gravity in
Ashtekar-Barbero variables | 18 pages | null | 10.1088/0264-9381/32/14/145011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the canonical phase space of asymptotically flat gravity in
Ashtekar-Barbero variables. We show that the Gauss constraint multiplier must
fall off slower than previously considered in order to recover ADM phase space.
The generators of the asymptotic Poincare group are derived within the
Ashtekar-Barbero ... | [
{
"created": "Wed, 17 Dec 2014 19:31:13 GMT",
"version": "v1"
}
] | 2015-08-06 | [
[
"Campiglia",
"Miguel",
""
]
] | We describe the canonical phase space of asymptotically flat gravity in Ashtekar-Barbero variables. We show that the Gauss constraint multiplier must fall off slower than previously considered in order to recover ADM phase space. The generators of the asymptotic Poincare group are derived within the Ashtekar-Barbero ph... |
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