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gr-qc/0510026 | Dr Mayeul Arminjon | Mayeul Arminjon | Equations of motion according to the asymptotic post-Newtonian scheme
for general relativity | 8 pages, no figure. Text of talks given at the 3rd Workshop "Gravity,
Astrophysics and Strings at the Black Sea" (Kiten, Bulgaria, June 13-20,
2005). Submitted to the Proceedings (P. Fiziev and M. Todorov, eds.) | Gravity, Astrophysics and Strings at the Black Sea (P. Fiziev & M.
Todorov, eds.), St. Kliment Ohridski University Press, Sofia (2006), pp. 1-9 | null | null | gr-qc astro-ph | null | We summarize a recent work done on the title's subject. First, we present the
asymptotic scheme of post-Newtonian (PN) approximation for general relativity
in the harmonic gauge. Then, we discuss the definition of the mass centers and
the derivation of equations for their motion, following that scheme. Finally,
we br... | [
{
"created": "Fri, 7 Oct 2005 15:27:40 GMT",
"version": "v1"
}
] | 2007-11-19 | [
[
"Arminjon",
"Mayeul",
""
]
] | We summarize a recent work done on the title's subject. First, we present the asymptotic scheme of post-Newtonian (PN) approximation for general relativity in the harmonic gauge. Then, we discuss the definition of the mass centers and the derivation of equations for their motion, following that scheme. Finally, we brie... |
1009.3030 | Nathalie Deruelle | A. Anabalon, N. Deruelle, D. Tempo and R. Troncoso | Remarks on the Myers-Perry and Einstein Gauss-Bonnet Rotating Solutions | null | Int.J.Mod.Phys.D20:639-647,2011 | 10.1142/S0218271811018974 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Kerr-type solutions of the five-dimensional Einstein and
Einstein-Gauss-Bonnet equations look pretty similar when written in Kerr-Schild
form. However the Myers-Perry spacetime is circular whereas the rotating
solution of the Einstein-Gauss-Bonnet theory is not. We explore some
consequences of this difference in ... | [
{
"created": "Wed, 15 Sep 2010 20:11:57 GMT",
"version": "v1"
}
] | 2011-05-25 | [
[
"Anabalon",
"A.",
""
],
[
"Deruelle",
"N.",
""
],
[
"Tempo",
"D.",
""
],
[
"Troncoso",
"R.",
""
]
] | The Kerr-type solutions of the five-dimensional Einstein and Einstein-Gauss-Bonnet equations look pretty similar when written in Kerr-Schild form. However the Myers-Perry spacetime is circular whereas the rotating solution of the Einstein-Gauss-Bonnet theory is not. We explore some consequences of this difference in pa... |
1501.06270 | Jaume Haro | Jaume Haro and Jaume Amor\'os | Matter Bounce Scenario in F(T) gravity | Communication to the FFP2014 (Frontiers in Fundamental Physics,
Marseille 2014). To appear in Proceedings of Science | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that teleparallel $F(T)$ theories of gravity combined with
holonomy corrected Loop Quantum Cosmology (LQC) support a Matter Bounce
Scenario (MBS) which is a potential alternative to the inflationary paradigm.
The Matter Bounce Scenario is reviewed and, according to the current
observational data provided ... | [
{
"created": "Mon, 26 Jan 2015 07:31:42 GMT",
"version": "v1"
}
] | 2015-01-27 | [
[
"Haro",
"Jaume",
""
],
[
"Amorós",
"Jaume",
""
]
] | It is shown that teleparallel $F(T)$ theories of gravity combined with holonomy corrected Loop Quantum Cosmology (LQC) support a Matter Bounce Scenario (MBS) which is a potential alternative to the inflationary paradigm. The Matter Bounce Scenario is reviewed and, according to the current observational data provided by... |
2303.05530 | Thomas W. Baumgarte | Thomas W. Baumgarte, Carsten Gundlach, and David Hilditch | Critical phenomena in the collapse of quadrupolar and hexadecapolar
gravitational waves | 17 pages, 14 figures | Phys. Rev. D 107, 084012 (2023) | 10.1103/PhysRevD.107.084012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on numerical simulations of critical phenomena near the threshold
of black hole formation in the collapse of axisymmetric gravitational waves in
vacuum. We discuss several new features of our numerical treatment, and then
compare results obtained from families of quadrupolar and hexadecapolar initial
data. ... | [
{
"created": "Thu, 9 Mar 2023 19:00:08 GMT",
"version": "v1"
}
] | 2024-06-26 | [
[
"Baumgarte",
"Thomas W.",
""
],
[
"Gundlach",
"Carsten",
""
],
[
"Hilditch",
"David",
""
]
] | We report on numerical simulations of critical phenomena near the threshold of black hole formation in the collapse of axisymmetric gravitational waves in vacuum. We discuss several new features of our numerical treatment, and then compare results obtained from families of quadrupolar and hexadecapolar initial data. Sp... |
1810.10505 | K{\i}van\c{c} \.Ibrahim \"Unl\"ut\"urk | Tekin Dereli and K{\i}van\c{c} \.I. \"Unl\"ut\"urk | Hamilton-Jacobi Formulation of the Thermodynamics of
Einstein-Born-Infeld-AdS Black Holes | 5 pages, 2 figures | EPL, 125 (2019) 10005 | 10.1209/0295-5075/125/10005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Hamilton-Jacobi formalism for thermodynamics was formulated by Rajeev [Ann.
Phys. 323, 2265 (2008)] based on the contact structure of the odd dimensional
thermodynamic phase space. This allows one to derive the equations of state of
a family of substances by solving a Hamilton-Jacobi equation (HJE). In the same
wor... | [
{
"created": "Wed, 24 Oct 2018 17:27:51 GMT",
"version": "v1"
}
] | 2019-01-31 | [
[
"Dereli",
"Tekin",
""
],
[
"Ünlütürk",
"Kıvanç İ.",
""
]
] | A Hamilton-Jacobi formalism for thermodynamics was formulated by Rajeev [Ann. Phys. 323, 2265 (2008)] based on the contact structure of the odd dimensional thermodynamic phase space. This allows one to derive the equations of state of a family of substances by solving a Hamilton-Jacobi equation (HJE). In the same work ... |
1208.3491 | Stephen Fairhurst | S. Babak, R. Biswas, P. R. Brady, D. A. Brown, K. Cannon, C. D.
Capano, J. H. Clayton, T. Cokelaer, J. D. E. Creighton, T. Dent, A. Dietz, S.
Fairhurst, N. Fotopoulos, G. Gonzalez, C. Hanna, I. W. Harry, G. Jones, D.
Keppel, D. J. A. McKechan, L. Pekowsky, S. Privitera, C. Robinson, A. C.
Rodriguez, B. S. Sathy... | Searching for gravitational waves from binary coalescence | 18 pages, 15 figures | null | 10.1103/PhysRevD.87.024033 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the implementation of a search for gravitational waves from
compact binary coalescences in LIGO and Virgo data. This all-sky, all-time,
multi-detector search for binary coalescence has been used to search data taken
in recent LIGO and Virgo runs. The search is built around a matched filter
analysis of the... | [
{
"created": "Thu, 16 Aug 2012 20:57:25 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Babak",
"S.",
""
],
[
"Biswas",
"R.",
""
],
[
"Brady",
"P. R.",
""
],
[
"Brown",
"D. A.",
""
],
[
"Cannon",
"K.",
""
],
[
"Capano",
"C. D.",
""
],
[
"Clayton",
"J. H.",
""
],
[
"Cokelaer",
"T."... | We describe the implementation of a search for gravitational waves from compact binary coalescences in LIGO and Virgo data. This all-sky, all-time, multi-detector search for binary coalescence has been used to search data taken in recent LIGO and Virgo runs. The search is built around a matched filter analysis of the d... |
gr-qc/9803041 | null | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Indeterministic Quantum Gravity and Cosmology XI. Quantum Measurement | 7 pages, LATEX 2.09 | null | null | IP 5/98 | gr-qc quant-ph | null | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034,
gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038,
gr-qc/9708014, gr-qc/9802016, gr-qc/9802022]. We define a quantum measurement
as a sequence of binary quantum jumps caused by a macroscopic apparatus. A
dynamical th... | [
{
"created": "Thu, 12 Mar 1998 09:35:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034, gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038, gr-qc/9708014, gr-qc/9802016, gr-qc/9802022]. We define a quantum measurement as a sequence of binary quantum jumps caused by a macroscopic apparatus. A dynamical theo... |
2302.03951 | Kota Numajiri | Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri | Revisiting compact star in $F(R)$ gravity: Roles of chameleon potential
and energy conditions | 37 pages, 22 figures, 1 table. Version to appear in PRD | Phys. Rev. D 107, 104019 (2023) | 10.1103/PhysRevD.107.104019 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We reexamine the static and spherical symmetric compact star configuration in
the $R^2$ model of the $F(R)$ gravity theory. With asymptotic solutions for the
additional scalar degrees of freedom, we refine analysis on the external
geometry and settle the scalar-hair problem argued in previous works.
Performing the nu... | [
{
"created": "Wed, 8 Feb 2023 09:13:48 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Feb 2023 09:34:31 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Apr 2023 15:29:54 GMT",
"version": "v3"
}
] | 2023-05-11 | [
[
"Numajiri",
"Kota",
""
],
[
"Cui",
"Yong-Xiang",
""
],
[
"Katsuragawa",
"Taishi",
""
],
[
"Nojiri",
"Shin'ichi",
""
]
] | We reexamine the static and spherical symmetric compact star configuration in the $R^2$ model of the $F(R)$ gravity theory. With asymptotic solutions for the additional scalar degrees of freedom, we refine analysis on the external geometry and settle the scalar-hair problem argued in previous works. Performing the nume... |
1006.2206 | Jibitesh Dutta | Jibitesh Dutta, Subenoy Chakraborty and M. Ansari | Non linear equation of state and effective phantom divide in brane
models | null | Int.J.Theor.Phys.49:2680-2690,2010 | 10.1007/s10773-010-0460-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, DGP model of brane-gravity is analyzed and compared with the standard
general relativity and Randall-Sundrum cases using non-linear equation of
state. Phantom fluid is known to violate the weak energy condition. In this
paper, it is found that this characteristic of phantom energy is affected
drastically by the... | [
{
"created": "Fri, 11 Jun 2010 06:34:31 GMT",
"version": "v1"
}
] | 2015-05-08 | [
[
"Dutta",
"Jibitesh",
""
],
[
"Chakraborty",
"Subenoy",
""
],
[
"Ansari",
"M.",
""
]
] | Here, DGP model of brane-gravity is analyzed and compared with the standard general relativity and Randall-Sundrum cases using non-linear equation of state. Phantom fluid is known to violate the weak energy condition. In this paper, it is found that this characteristic of phantom energy is affected drastically by the n... |
1808.07897 | Luis Lehner | Gwyneth Allwright and Luis Lehner | Towards the nonlinear regime in extensions to GR: assessing possible
options | 11 pages, 6 figures | null | 10.1088/1361-6382/ab0ee1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Testing General Relativity and exploring possible departures has received
further input with the possibility to do so through gravitational waves emitted
in strongly gravitating/highly dynamical scenarios and also through the
availability of exquisitely sensitive cosmological observations. However, most
extensions su... | [
{
"created": "Thu, 23 Aug 2018 18:25:15 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Allwright",
"Gwyneth",
""
],
[
"Lehner",
"Luis",
""
]
] | Testing General Relativity and exploring possible departures has received further input with the possibility to do so through gravitational waves emitted in strongly gravitating/highly dynamical scenarios and also through the availability of exquisitely sensitive cosmological observations. However, most extensions suff... |
0806.0768 | Orchidea Maria Lecian | Marco Valerio Battisti, Orchidea Maria Lecian, Giovanni Montani | Polymer Quantum Dynamics of the Taub Universe | 12 pages, 6 figures; published version | Phys.Rev.D78:103514,2008 | 10.1103/PhysRevD.78.103514 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of non-standard (Weyl) representations of the canonical
commutation relations, we investigate the polymer quantization of the Taub
cosmological model. The Taub model is analyzed within the Arnowitt-Deser-Misner
reduction of its dynamics, by which a time variable arises. While the energy
variable ... | [
{
"created": "Wed, 4 Jun 2008 13:19:50 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Nov 2008 13:47:37 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Lecian",
"Orchidea Maria",
""
],
[
"Montani",
"Giovanni",
""
]
] | Within the framework of non-standard (Weyl) representations of the canonical commutation relations, we investigate the polymer quantization of the Taub cosmological model. The Taub model is analyzed within the Arnowitt-Deser-Misner reduction of its dynamics, by which a time variable arises. While the energy variable an... |
gr-qc/0703092 | Mamdouh Wanas | M.I.Wanas, M.A.Bakry | A Note on General Covariant Stability Theory | Three pages, LaTeX file | null | 10.1142/9789812834300_0341 | null | gr-qc | null | In the present work we suggest a general covariant theory which can be used
to study the stability of any physical system treated geometrically. Stability
conditions are connected to the magnitude of the deviation vector. This theory
is a modification of an earlier joint work, by the same authors, concerning
stabilit... | [
{
"created": "Sat, 17 Mar 2007 23:55:45 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2007 13:26:41 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Wanas",
"M. I.",
""
],
[
"Bakry",
"M. A.",
""
]
] | In the present work we suggest a general covariant theory which can be used to study the stability of any physical system treated geometrically. Stability conditions are connected to the magnitude of the deviation vector. This theory is a modification of an earlier joint work, by the same authors, concerning stability.... |
gr-qc/0001057 | Sergiu Vacaru | Sergiu I. Vacaru | Stochastic Processes and Thermodynamics on Curved Spaces | latex209, 3 pages | null | null | null | gr-qc astro-ph hep-ph | null | Our approach views the thermodynamics and kinetics in general relativity and
extended gravitational theories (with generic local anisotropy) from the
perspective of the theory of stochastic differential equations on curved
spaces.
Nonequilibrium and irreversible processes in black hole thermodynamics are
considered... | [
{
"created": "Thu, 20 Jan 2000 11:27:23 GMT",
"version": "v1"
}
] | 2008-11-24 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | Our approach views the thermodynamics and kinetics in general relativity and extended gravitational theories (with generic local anisotropy) from the perspective of the theory of stochastic differential equations on curved spaces. Nonequilibrium and irreversible processes in black hole thermodynamics are considered. Th... |
1712.01274 | Faizuddin Ahmed | Faizuddin Ahmed | A Type D Non-Vacuum Spacetime with Causality Violating Curves, and its
Physical Interpretation | 18 pages, 2 figures | Commun. Theor. Phys. vol. 68, No. 06, 735 (2017),
http://ctp.itp.ac.cn | 10.1088/0253-6102/68/6/735 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a topologically trivial, non-vacuum solution of the Einstein's
field equations in four-dimensions, which is regular everywhere. The metric
admits circular closed timelike curves, which appear beyond the null curve, and
these timelike curves are linearly stable under linear perturbations.
Additionally, the ... | [
{
"created": "Mon, 4 Dec 2017 04:29:20 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Ahmed",
"Faizuddin",
""
]
] | We present a topologically trivial, non-vacuum solution of the Einstein's field equations in four-dimensions, which is regular everywhere. The metric admits circular closed timelike curves, which appear beyond the null curve, and these timelike curves are linearly stable under linear perturbations. Additionally, the sp... |
gr-qc/0609126 | H. Casini | H. Casini | Mutual information challenges entropy bounds | 10 pages, 2 figures, minor changes | Class.Quant.Grav.24:1293-1302,2007 | 10.1088/0264-9381/24/5/013 | null | gr-qc hep-th | null | We consider some formulations of the entropy bounds at the semiclassical
level. The entropy S(V) localized in a region V is divergent in quantum field
theory (QFT). Instead of it we focus on the mutual information
I(V,W)=S(V)+S(W)-S(V\cup W) between two different non-intersecting sets V and
W. This is a low energy qu... | [
{
"created": "Wed, 27 Sep 2006 16:05:51 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Mar 2007 14:14:09 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Casini",
"H.",
""
]
] | We consider some formulations of the entropy bounds at the semiclassical level. The entropy S(V) localized in a region V is divergent in quantum field theory (QFT). Instead of it we focus on the mutual information I(V,W)=S(V)+S(W)-S(V\cup W) between two different non-intersecting sets V and W. This is a low energy quan... |
1009.5179 | Claudio Dappiaggi | Claudio Dappiaggi, Thomas-Paul Hack, Nicola Pinamonti | Approximate KMS states for scalar and spinor fields in
Friedmann-Robertson-Walker spacetimes | 42 pages | null | 10.1007/s00023-011-0111-6 | Desy 10-160, ESI-2266, ZMP-HH/10-19 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and discuss Hadamard states for both scalar and Dirac spinor
fields in a large class of spatially flat Friedmann-Robertson-Walker spacetimes
characterised by an initial phase either of exponential or of power-law
expansion. The states we obtain can be interpreted as being in thermal
equilibrium at the ti... | [
{
"created": "Mon, 27 Sep 2010 07:56:41 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Dappiaggi",
"Claudio",
""
],
[
"Hack",
"Thomas-Paul",
""
],
[
"Pinamonti",
"Nicola",
""
]
] | We construct and discuss Hadamard states for both scalar and Dirac spinor fields in a large class of spatially flat Friedmann-Robertson-Walker spacetimes characterised by an initial phase either of exponential or of power-law expansion. The states we obtain can be interpreted as being in thermal equilibrium at the time... |
1801.08173 | Christian Pfeifer | Leonardo Barcaroli and Lukas K. Brunkhorst and Giulia Gubitosi and
Niccol\'o Loret and Christian Pfeifer | Hamilton Geometry - Phase Space Geometry from Modified Dispersion
Relations | 6 pages | Proceedings, 14th Marcel Grossmann Meeting on Recent Developments
in Theoretical and Experimental General Relativity, Astrophysics, and
Relativistic Field Theories (MG14) (In 4 Volumes): Rome, Italy, July 12-18,
2015, Pages: 3929-3934 | 10.1142/9789813226609_0522 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity phenomenology suggests an effective modification of the
general relativistic dispersion relation of freely falling point particles
caused by an underlying theory of quantum gravity. Here we analyse the
consequences of modifications of the general relativistic dispersion on the
geometry of spacetime in... | [
{
"created": "Wed, 24 Jan 2018 20:10:38 GMT",
"version": "v1"
}
] | 2018-01-26 | [
[
"Barcaroli",
"Leonardo",
""
],
[
"Brunkhorst",
"Lukas K.",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Loret",
"Niccoló",
""
],
[
"Pfeifer",
"Christian",
""
]
] | Quantum gravity phenomenology suggests an effective modification of the general relativistic dispersion relation of freely falling point particles caused by an underlying theory of quantum gravity. Here we analyse the consequences of modifications of the general relativistic dispersion on the geometry of spacetime in t... |
1102.2001 | Matt Visser | Kane O'Donnell (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Elementary analysis of the special relativistic combination of
velocities, Wigner rotation, and Thomas precession | V1: 25 pages, 6 figures; V2: 22 pages, 5 figures. The revised version
is shortened and the arguments streamlined. Minor changes in notation and
figures. This version matches the published version | European Journal of Physics 31 (2011) 1033--1047 | 10.1088/0143-0807/32/4/016 | null | gr-qc math-ph math.MP physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to provide an elementary introduction to the
qualitative and quantitative results of velocity combination in special
relativity, including the Wigner rotation and Thomas precession. We utilize
only the most familiar tools of special relativity, in arguments presented at
three differing le... | [
{
"created": "Wed, 9 Feb 2011 22:36:17 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Jun 2011 01:39:36 GMT",
"version": "v2"
}
] | 2015-03-18 | [
[
"O'Donnell",
"Kane",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The purpose of this paper is to provide an elementary introduction to the qualitative and quantitative results of velocity combination in special relativity, including the Wigner rotation and Thomas precession. We utilize only the most familiar tools of special relativity, in arguments presented at three differing leve... |
2404.16079 | Oleg Zenin | Stanislav Alexeyev, Artem Baiderin, Alexandra Nemtinova, Oleg Zenin | Non-local gravitational corrections in black hole shadow images | 12 pages, 6 figures | Zh. Exp. Teor. Fiz. (JETP, Russian version), 2024, Vol. 165, No 4,
p. 508-515 | 10.31857/S0044451024040059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the help of Newman-Janis method new spinning black hole (BH) solution
for a non-local gravity model was obtained. We show how to account the quantum
gravitational correction part in BH shadows modelling using spinning BH metrics
with a model independent approach. It is confirmed that in the future to follow
the ... | [
{
"created": "Wed, 24 Apr 2024 13:12:32 GMT",
"version": "v1"
}
] | 2024-04-26 | [
[
"Alexeyev",
"Stanislav",
""
],
[
"Baiderin",
"Artem",
""
],
[
"Nemtinova",
"Alexandra",
""
],
[
"Zenin",
"Oleg",
""
]
] | With the help of Newman-Janis method new spinning black hole (BH) solution for a non-local gravity model was obtained. We show how to account the quantum gravitational correction part in BH shadows modelling using spinning BH metrics with a model independent approach. It is confirmed that in the future to follow the in... |
1908.07381 | Gamal G.L. Nashed | Salvatore Capozziello and Gamal G.L. Nashed | Rotating and non-rotating AdS black holes in $f({\cal T})$ gravity
non-linear electrodynamics | 14 Pages, 3 Ligures, Latex, Will appear in EPJC | null | 10.1140/epjc/s10052-019-7424-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive new exact charged $d$-dimensional black hole solutions for
quadratic teleparallel equivalent gravity, $f({\cal T})=a_0+a_1{\cal
T}+a_2{\cal T}^2$, where $\cal T$ is the torsion scalar, in the case of
non-linear electrodynamics. We give a specific form of electromagnetic function
and find out the form of the... | [
{
"created": "Sat, 17 Aug 2019 09:54:02 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Oct 2019 14:06:20 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Nashed",
"Gamal G. L.",
""
]
] | We derive new exact charged $d$-dimensional black hole solutions for quadratic teleparallel equivalent gravity, $f({\cal T})=a_0+a_1{\cal T}+a_2{\cal T}^2$, where $\cal T$ is the torsion scalar, in the case of non-linear electrodynamics. We give a specific form of electromagnetic function and find out the form of the u... |
0911.5376 | Baocheng Zhang | Baocheng Zhang, Qing-yu Cai, and Ming-sheng Zhan | Entropy Conservation in the Transition of Schwarzschild-de Sitter space
to de Sitter space through tunneling | null | Chin. Phys. Lett. 29 (2012) 020401 | 10.1088/0256-307X/29/2/020401 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the Parikh-Wilczek tunneling through the de Sitter horizon and
obtain the tunneling rate in Schwarzschild-de Sitter space, which is
non-thermal and closely related to the change of entropy. We discuss the
thermodynamics of Schwarzschild-de Sitter space and show existence of
correlation which ensured the co... | [
{
"created": "Sat, 28 Nov 2009 05:26:22 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Nov 2012 05:52:02 GMT",
"version": "v2"
}
] | 2012-11-15 | [
[
"Zhang",
"Baocheng",
""
],
[
"Cai",
"Qing-yu",
""
],
[
"Zhan",
"Ming-sheng",
""
]
] | We revisit the Parikh-Wilczek tunneling through the de Sitter horizon and obtain the tunneling rate in Schwarzschild-de Sitter space, which is non-thermal and closely related to the change of entropy. We discuss the thermodynamics of Schwarzschild-de Sitter space and show existence of correlation which ensured the cons... |
1507.03728 | Handhika Ramadhan | Handhika S. Ramadhan, Brian A. Cahyo, and Muhammad Iqbal | Flux compactifications in Einstein-Born-Infeld theories | 17 pages, 8 figures | Phys. Rev. D 92 024021 (2015) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the flux compactification mechanism in simple toy models of
Einstein-Born-Infeld theories. These are the direct generalizations of the
Einstein-Maxwell flux compactifications that recently gained fame as a toy
model for tunneling in the landscape. Our investigation reveals that the
Born-Infeld form doe... | [
{
"created": "Tue, 14 Jul 2015 06:09:52 GMT",
"version": "v1"
}
] | 2015-07-15 | [
[
"Ramadhan",
"Handhika S.",
""
],
[
"Cahyo",
"Brian A.",
""
],
[
"Iqbal",
"Muhammad",
""
]
] | We investigate the flux compactification mechanism in simple toy models of Einstein-Born-Infeld theories. These are the direct generalizations of the Einstein-Maxwell flux compactifications that recently gained fame as a toy model for tunneling in the landscape. Our investigation reveals that the Born-Infeld form does ... |
2112.15112 | Zinnat Hassan | G. Mustafa, Zinnat Hassan, P.K. Sahoo | Traversable wormhole inspired by non-commutative geometries in $f(Q)$
gravity with conformal symmetry | Annals of Physics published version | Annals of Physics 437 (2022) 168751 | 10.1016/j.aop.2021.168751 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This article is based on the study of wormhole geometries in the context of
symmetric teleparallel gravity or $f(Q)$ gravity, where $Q$ is the
non-metricity scalar, and it is responsible for the gravitational interaction.
To discuss the wormhole solutions, we consider spherically symmetric static
spacetime metric wit... | [
{
"created": "Thu, 30 Dec 2021 16:11:39 GMT",
"version": "v1"
}
] | 2022-01-11 | [
[
"Mustafa",
"G.",
""
],
[
"Hassan",
"Zinnat",
""
],
[
"Sahoo",
"P. K.",
""
]
] | This article is based on the study of wormhole geometries in the context of symmetric teleparallel gravity or $f(Q)$ gravity, where $Q$ is the non-metricity scalar, and it is responsible for the gravitational interaction. To discuss the wormhole solutions, we consider spherically symmetric static spacetime metric with ... |
gr-qc/0209032 | B. V. Ivanov | B.V.Ivanov | The general double-dust solution | 14 pages, RevTex; paper version replacing letter version | null | null | null | gr-qc | null | The gravitational field of two identical rotating and counter-moving dust
beams is found in full generality. The solution depends on an arbitrary
function and a parameter. Some of its properties are studied. Previous
particular solutions are derived as subcases.
| [
{
"created": "Tue, 10 Sep 2002 09:41:37 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2002 10:04:41 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Feb 2003 09:49:29 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Ivanov",
"B. V.",
""
]
] | The gravitational field of two identical rotating and counter-moving dust beams is found in full generality. The solution depends on an arbitrary function and a parameter. Some of its properties are studied. Previous particular solutions are derived as subcases. |
gr-qc/9401007 | Hideo Kodama | Hideo Kodama, Hideki Ishihara and Yoshihisa Fujiwara | Does a domain wall emit gravitational waves? -- General-relativistic
perturbative treatment | 26pages, LaTeX file with epsfs | Phys.Rev.D50:7292-7303,1994 | 10.1103/PhysRevD.50.7292 | YITP/U-94-01 | gr-qc | null | The behavior of gravitational wave perturbations on a locally Minkowskian
spacetime background containing a planar domain wall is investigated in the
gauge-invariant general relativistic framework. It is shown that for this
particular background the domain wall does not emit gravitational waves
spontaneously by its f... | [
{
"created": "Mon, 10 Jan 1994 09:09:03 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Kodama",
"Hideo",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Fujiwara",
"Yoshihisa",
""
]
] | The behavior of gravitational wave perturbations on a locally Minkowskian spacetime background containing a planar domain wall is investigated in the gauge-invariant general relativistic framework. It is shown that for this particular background the domain wall does not emit gravitational waves spontaneously by its fre... |
1212.2163 | Tsuyoshi Houri | Tsuyoshi Houri and Kei Yamamoto | Killing-Yano symmetry of Kaluza-Klein black holes in five dimensions | 22 pages, no figures, v2: references added, minor changes to section
2 | Class.Quant.Grav.30:075013,2013 | 10.1088/0264-9381/30/7/075013 | DAMTP-2012-83, OCU-PHYS-377 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a generalised Killing-Yano equation in the presence of torsion,
spacetime metrics admitting a rank-2 generalised Killing-Yano tensor are
investigated in five dimensions under the assumption that its eigenvector
associated with the zero eigenvalue is a Killing vector field. It is shown that
such metrics are clas... | [
{
"created": "Mon, 10 Dec 2012 18:40:47 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2013 06:21:32 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Houri",
"Tsuyoshi",
""
],
[
"Yamamoto",
"Kei",
""
]
] | Using a generalised Killing-Yano equation in the presence of torsion, spacetime metrics admitting a rank-2 generalised Killing-Yano tensor are investigated in five dimensions under the assumption that its eigenvector associated with the zero eigenvalue is a Killing vector field. It is shown that such metrics are classi... |
gr-qc/9807021 | Hagen Kleinert | H. Kleinert | Universality Principle for Orbital Angular Momentum and Spin in Gravity
with Torsion | Author Information under
http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of
paper also at http://www.physik.fu-berlin.de/~kleinert/kleiner_re271 | Gen.Rel.Grav. 32 (2000) 1271-1280 | 10.1023/A:1001990604209 | null | gr-qc | null | We argue that compatibility with elementary particle physics requires
gravitational theories with torsion to be unable to distinguish between orbital
angular momentum and spin. An important consequence of this principle is that
spinless particles must move along autoparallel trajectories, not along
geodesics.
| [
{
"created": "Thu, 9 Jul 1998 12:06:00 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jul 1998 06:54:19 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Jul 1998 10:40:09 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Kleinert",
"H.",
""
]
] | We argue that compatibility with elementary particle physics requires gravitational theories with torsion to be unable to distinguish between orbital angular momentum and spin. An important consequence of this principle is that spinless particles must move along autoparallel trajectories, not along geodesics. |
1410.4779 | Eric Thrane | John T. Giblin Jr. and Eric Thrane | The detectability of cosmological gravitational-wave backgrounds: a rule
of thumb | 6 pages, 1 figure | Phys. Rev. D 90, 107502 (2014) | 10.1103/PhysRevD.90.107502 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent claim by BICEP2 of evidence for primordial gravitational waves
from inflation has focused interest on the potential for early-Universe
cosmology using observations of gravitational waves. In addition to cosmic
microwave background detectors, efforts are underway to carry out
gravitational-wave astronomy ov... | [
{
"created": "Fri, 17 Oct 2014 16:00:29 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Oct 2014 18:57:43 GMT",
"version": "v2"
}
] | 2016-07-11 | [
[
"Giblin",
"John T.",
"Jr."
],
[
"Thrane",
"Eric",
""
]
] | The recent claim by BICEP2 of evidence for primordial gravitational waves from inflation has focused interest on the potential for early-Universe cosmology using observations of gravitational waves. In addition to cosmic microwave background detectors, efforts are underway to carry out gravitational-wave astronomy over... |
0711.4909 | Ming Lei Tong | M. L. Tong, Y. Zhang | Detecting very-high-frequency relic gravitational waves by
electromagnetic wave polarizations in a waveguide | 18pages, 10 figures, accepted by ChJAA | Chin. J. Astron. Astrophys. 8, 314, (2008) | 10.1088/1009-9271/8/3/08 | null | gr-qc | null | The polarization vector (PV) of an electromagnetic wave (EW) will experience
a rotation in a region of spacetime perturbed by gravitational waves (GWs).
Based on this idea, Cruise's group has built an annular waveguide to detect
GWs. We give detailed calculations of the rotations of the polarization vector
of an EW c... | [
{
"created": "Fri, 30 Nov 2007 11:39:43 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Tong",
"M. L.",
""
],
[
"Zhang",
"Y.",
""
]
] | The polarization vector (PV) of an electromagnetic wave (EW) will experience a rotation in a region of spacetime perturbed by gravitational waves (GWs). Based on this idea, Cruise's group has built an annular waveguide to detect GWs. We give detailed calculations of the rotations of the polarization vector of an EW cau... |
1203.1151 | Partha Mukhopadhyay | Partha Mukhopadhyay | All order covariant tubular expansion | 27 pages. Corrected an error in a class of coefficients resulting
from a typo. Integral theorem and all other results remain unchanged | Reviews in Mathematical Physics, Vol. 26, No. 1 (2013) 1350019 | 10.1142/S0129055X13500190 | IMSc/2012/3/5 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider tubular neighborhood of an arbitrary submanifold embedded in a
(pseudo-)Riemannian manifold. This can be described by Fermi normal coordinates
(FNC) satisfying certain conditions as described by Florides and Synge in
\cite{FS}. By generalizing the work of Muller {\it et al} in \cite{muller} on
Riemann nor... | [
{
"created": "Tue, 6 Mar 2012 09:58:03 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Oct 2012 13:34:49 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Nov 2013 09:35:17 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Aug 2016 20:58:56 GMT",
"version": "v4"
},
{
"cr... | 2016-08-22 | [
[
"Mukhopadhyay",
"Partha",
""
]
] | We consider tubular neighborhood of an arbitrary submanifold embedded in a (pseudo-)Riemannian manifold. This can be described by Fermi normal coordinates (FNC) satisfying certain conditions as described by Florides and Synge in \cite{FS}. By generalizing the work of Muller {\it et al} in \cite{muller} on Riemann norma... |
1612.04554 | Panayiotis Stavrinos | Panayiotis C.Stavrinos and Maria Alexiou | Raychaudhuri equation in the Finsler-Randers spacetime and Generalized
scalar-tensor theories | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we obtain the Raychaudhuri equations for various types of
Finsler spaces as the Finsler-Randers (FR) space-time and in a more general
geometrical structure of the space-time manifold which contains two fibres that
are two scalars which represent inflaton fields $\phi^{(1)}, \phi^{(2)}.$In
addition, the ... | [
{
"created": "Wed, 14 Dec 2016 09:54:17 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Nov 2017 10:58:35 GMT",
"version": "v2"
}
] | 2017-11-15 | [
[
"Stavrinos",
"Panayiotis C.",
""
],
[
"Alexiou",
"Maria",
""
]
] | In this work, we obtain the Raychaudhuri equations for various types of Finsler spaces as the Finsler-Randers (FR) space-time and in a more general geometrical structure of the space-time manifold which contains two fibres that are two scalars which represent inflaton fields $\phi^{(1)}, \phi^{(2)}.$In addition, the en... |
1305.6936 | Vitor Cardoso | Vitor Cardoso, Isabella P. Carucci, Paolo Pani, Thomas P. Sotiriou | Matter around Kerr black holes in scalar-tensor theories: scalarization
and superradiant instability | 11 pages, 3 figures. v2: published version | Phys.Rev. D88, 044056 (2013) | 10.1103/PhysRevD.88.044056 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In electrovacuum stationary, asymptotically flat black holes in scalar-tensor
theories of gravity are described by the Kerr-Newman family of solutions, just
as in general relativity. We show that there exist two mechanisms which can
render Kerr black holes unstable when matter is present in the vicinity of the
black ... | [
{
"created": "Wed, 29 May 2013 20:00:40 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jan 2014 19:53:52 GMT",
"version": "v2"
}
] | 2014-01-23 | [
[
"Cardoso",
"Vitor",
""
],
[
"Carucci",
"Isabella P.",
""
],
[
"Pani",
"Paolo",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | In electrovacuum stationary, asymptotically flat black holes in scalar-tensor theories of gravity are described by the Kerr-Newman family of solutions, just as in general relativity. We show that there exist two mechanisms which can render Kerr black holes unstable when matter is present in the vicinity of the black ho... |
1505.05102 | Sergio Ulhoa | J. G. Silva, A. F. Santos and S. C. Ulhoa | On FRW Model in Conformal Teleparallel Gravity | Accepted in EPJC | The European Physical Journal C, 76:167, 2016 | 10.1140/epjc/s10052-016-4023-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we use the conformal teleparallel gravity to study an isotropic
and homogeneous Universe which is settled by the FRW metric. We solve the field
equations and we obtain the behavior of some cosmological parameters such as
scale factor, deceleration parameter and the energy density of the perfect
fluid wh... | [
{
"created": "Sat, 16 May 2015 18:58:47 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2016 19:22:40 GMT",
"version": "v2"
}
] | 2016-03-30 | [
[
"Silva",
"J. G.",
""
],
[
"Santos",
"A. F.",
""
],
[
"Ulhoa",
"S. C.",
""
]
] | In this paper we use the conformal teleparallel gravity to study an isotropic and homogeneous Universe which is settled by the FRW metric. We solve the field equations and we obtain the behavior of some cosmological parameters such as scale factor, deceleration parameter and the energy density of the perfect fluid whic... |
gr-qc/0405098 | Alessandro Fabbri | R. Balbinot, S. Fagnocchi, A. Fabbri | Quantum effects in Acoustic Black Holes: the Backreaction | 23 pages, latex, 1 figure; revised version, to appear in Phys. Rev. D | Phys.Rev. D71 (2005) 064019 | 10.1103/PhysRevD.71.064019 | null | gr-qc cond-mat.other hep-th | null | We investigate the backreaction equations for an acoustic black hole formed
in a Laval nozzle under the assumption that the motion of the fluid is
one-dimensional. The solution in the near-horizon region shows that as phonons
are (thermally) radiated the sonic horizon shrinks and the temperature
decreases. This contr... | [
{
"created": "Tue, 18 May 2004 14:49:11 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Mar 2005 11:24:33 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Balbinot",
"R.",
""
],
[
"Fagnocchi",
"S.",
""
],
[
"Fabbri",
"A.",
""
]
] | We investigate the backreaction equations for an acoustic black hole formed in a Laval nozzle under the assumption that the motion of the fluid is one-dimensional. The solution in the near-horizon region shows that as phonons are (thermally) radiated the sonic horizon shrinks and the temperature decreases. This contras... |
1607.06278 | Masato Minamitsuji | Masato Minamitsuji | Solutions in the generalized Proca theory with the nonminimal coupling
to the Einstein tensor | 11 pages, no figure, the journal version | Phys. Rev. D 94, 084039 (2016) | 10.1103/PhysRevD.94.084039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the static and spherically symmetric solutions in a class of
the generalized Proca theory with the nonminimal coupling to the Einstein
tensor. First, we show that the solutions in the scalar-tensor theory with the
nonminimal derivative coupling to the Einstein tensor can be those in the
generalized Pro... | [
{
"created": "Thu, 21 Jul 2016 11:46:53 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2016 22:42:58 GMT",
"version": "v2"
},
{
"created": "Sun, 30 Oct 2016 12:55:36 GMT",
"version": "v3"
}
] | 2016-11-01 | [
[
"Minamitsuji",
"Masato",
""
]
] | We investigate the static and spherically symmetric solutions in a class of the generalized Proca theory with the nonminimal coupling to the Einstein tensor. First, we show that the solutions in the scalar-tensor theory with the nonminimal derivative coupling to the Einstein tensor can be those in the generalized Proca... |
2104.06998 | Fabrizio Tamburini | Fabrizio Tamburini, Fabiano Feleppa, Ignazio Licata, and Bo Thid\'e | Kerr spacetime geometric optics for vortex beams | 9 pages, 1 figure | Phys. Rev. A 104, 013718 (2021) | 10.1103/PhysRevA.104.013718 | null | gr-qc astro-ph.HE physics.optics | http://creativecommons.org/licenses/by/4.0/ | We apply the analogy between gravitational fields and optical media in the
general relativistic geometric optics framework to describe how light can
acquire orbital angular momentum (OAM) when it traverses the gravitational
field of a massive rotating compact object and the interplay between OAM and
polarization. Ker... | [
{
"created": "Wed, 14 Apr 2021 17:29:31 GMT",
"version": "v1"
}
] | 2021-07-28 | [
[
"Tamburini",
"Fabrizio",
""
],
[
"Feleppa",
"Fabiano",
""
],
[
"Licata",
"Ignazio",
""
],
[
"Thidé",
"Bo",
""
]
] | We apply the analogy between gravitational fields and optical media in the general relativistic geometric optics framework to describe how light can acquire orbital angular momentum (OAM) when it traverses the gravitational field of a massive rotating compact object and the interplay between OAM and polarization. Kerr ... |
1309.7092 | Edward Glass | E.N. Glass | Generating Anisotropic Collapse and Expansion Solutions of Einstein's
Equations | to appear in Gen. Rel. Gravit | null | 10.1007/s10714-013-1609-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analytic gravitational collapse and expansion solutions with anisotropic
pressure are generated. Metric functions are found by requiring zero heat flow
scalar. It emerges that a single function generates the anisotropic solutions.
Each generating function contains an arbitrary function of time which can be
chosen to ... | [
{
"created": "Fri, 27 Sep 2013 00:52:28 GMT",
"version": "v1"
}
] | 2013-09-30 | [
[
"Glass",
"E. N.",
""
]
] | Analytic gravitational collapse and expansion solutions with anisotropic pressure are generated. Metric functions are found by requiring zero heat flow scalar. It emerges that a single function generates the anisotropic solutions. Each generating function contains an arbitrary function of time which can be chosen to fi... |
gr-qc/0601016 | Dan Vollick | Dan N. Vollick | Einstein-Maxwell and Einstein-Proca theory from a modified gravitational
action | 9 pages | null | null | null | gr-qc hep-th | null | A modified gravitational action is considered which involves the quantity
$F_{\mu\nu}=\partial_{\mu}\Gamma_{\nu}-\partial_{\nu}\Gamma_{\mu}$, where
$\Gamma_{\mu}=\Gamma^{\alpha}_{\mu\alpha}$. Since $\Gamma_{\mu}$ transforms
like a U(1) gauge field under coordinate transformations terms such as
$F^{\mu\nu}F_{\mu\nu}$ ... | [
{
"created": "Wed, 4 Jan 2006 19:07:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vollick",
"Dan N.",
""
]
] | A modified gravitational action is considered which involves the quantity $F_{\mu\nu}=\partial_{\mu}\Gamma_{\nu}-\partial_{\nu}\Gamma_{\mu}$, where $\Gamma_{\mu}=\Gamma^{\alpha}_{\mu\alpha}$. Since $\Gamma_{\mu}$ transforms like a U(1) gauge field under coordinate transformations terms such as $F^{\mu\nu}F_{\mu\nu}$ ar... |
1210.7902 | Je-An Gu | Je-An Gu, Sang Pyo Kim, Che-Min Shen | de Sitter Radiation and Backreaction in Quantum Cosmology | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the quantum cosmology description of the de Sitter (dS) radiation
and its backreaction to dS space, inherent in the wave function of the
Wheeler-DeWitt equation for pure gravity with a cosmological constant. We first
investigate the quantum Friedmann-Lemaitre-Robertson-Walker cosmological model
and then co... | [
{
"created": "Tue, 30 Oct 2012 04:16:22 GMT",
"version": "v1"
}
] | 2012-10-31 | [
[
"Gu",
"Je-An",
""
],
[
"Kim",
"Sang Pyo",
""
],
[
"Shen",
"Che-Min",
""
]
] | We explore the quantum cosmology description of the de Sitter (dS) radiation and its backreaction to dS space, inherent in the wave function of the Wheeler-DeWitt equation for pure gravity with a cosmological constant. We first investigate the quantum Friedmann-Lemaitre-Robertson-Walker cosmological model and then cons... |
1604.08586 | Anna Ijjas | Anna Ijjas, Justin Ripley, Paul J. Steinhardt | NEC violation in mimetic cosmology revisited | 7 pages | Physics Letters B 760 (2016), pp. 132-138 | 10.1016/j.physletb.2016.06.052 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Einstein gravity, if the null energy condition (NEC) is
satisfied, the energy density in expanding space-times always decreases while
in contracting space-times the energy density grows and the universe eventually
collapses into a singularity. In particular, no non-singular bounce is
possible. It is... | [
{
"created": "Thu, 28 Apr 2016 17:43:01 GMT",
"version": "v1"
}
] | 2016-07-04 | [
[
"Ijjas",
"Anna",
""
],
[
"Ripley",
"Justin",
""
],
[
"Steinhardt",
"Paul J.",
""
]
] | In the context of Einstein gravity, if the null energy condition (NEC) is satisfied, the energy density in expanding space-times always decreases while in contracting space-times the energy density grows and the universe eventually collapses into a singularity. In particular, no non-singular bounce is possible. It is, ... |
0906.4269 | Kent Yagi | Kent Yagi, Takahiro Tanaka | Constraining alternative theories of gravity by gravitational waves from
precessing eccentric compact binaries with LISA | 35 pages, 17 figures; some corrections have been made on the Monte
Carlo simulations for the massive graviton case; corresponding tables and
figures have been replaced, but the major result almost unchanged. | Phys.Rev.D81:064008,2010; Erratum-ibid.D81:109902,2010 | 10.1103/PhysRevD.81.064008 10.1103/PhysRevD.81.109902 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate how strongly one can put constraints on alternative theories of
gravity such as Brans-Dicke and massive graviton theories with LISA. We
consider inspiral gravitational waves from a compact binary composed of a
neutron star (NS) and an intermediate mass black hole (IMBH) in Brans-Dicke
(BD) theory and tha... | [
{
"created": "Tue, 23 Jun 2009 19:57:46 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2009 20:00:59 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Apr 2010 08:55:20 GMT",
"version": "v3"
},
{
"created": "Thu, 13 May 2010 14:13:37 GMT",
"version": "v4"
}
] | 2014-11-20 | [
[
"Yagi",
"Kent",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We calculate how strongly one can put constraints on alternative theories of gravity such as Brans-Dicke and massive graviton theories with LISA. We consider inspiral gravitational waves from a compact binary composed of a neutron star (NS) and an intermediate mass black hole (IMBH) in Brans-Dicke (BD) theory and that ... |
2205.10168 | Serge Repin Mr. | Serge V. Repin, Mikhail A. Bugaev, Igor D. Novikov and Igor D. Novikov
jr | Silhouettes of wormholes traversed for radiation | 11 pages, 12 figures | Astronomy Reports, vol. 66, issue 10, pp. 835-844 (2022) | 10.1134/S1063772922100122 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The problem of the passage of light through the mouth of a zero-mass wormhole
and the possibility of observing the objects from another asymptotically flat
space-time through the mouth of a wormhole are considered. It is shown that an
individual star can have several images and the fact that the image of a flat
Lambe... | [
{
"created": "Fri, 20 May 2022 13:19:27 GMT",
"version": "v1"
}
] | 2023-05-30 | [
[
"Repin",
"Serge V.",
""
],
[
"Bugaev",
"Mikhail A.",
""
],
[
"Novikov",
"Igor D.",
""
],
[
"Novikov",
"Igor D.",
"jr"
]
] | The problem of the passage of light through the mouth of a zero-mass wormhole and the possibility of observing the objects from another asymptotically flat space-time through the mouth of a wormhole are considered. It is shown that an individual star can have several images and the fact that the image of a flat Lambert... |
0807.3072 | Joseph Katz | Jiri Bicak, Joseph Katz and Donald Lynden-Bell | Gravitational waves and dragging effects | Scheduled to appear in Class. Quantum Grav. July 2008 | Class. Quantum Grav. 25 (2008) 165017 | 10.1088/0264-9381/25/16/165017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Linear and rotational dragging effects of gravitational waves on local
inertial frames are studied in purely vacuum spacetimes. First the linear
dragging caused by a simple cylindrical pulse is investigated. Surprisingly
strong transversal effects of the pulse are exhibited. The angular momentum in
cylindrically symm... | [
{
"created": "Sat, 19 Jul 2008 09:35:32 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Bicak",
"Jiri",
""
],
[
"Katz",
"Joseph",
""
],
[
"Lynden-Bell",
"Donald",
""
]
] | Linear and rotational dragging effects of gravitational waves on local inertial frames are studied in purely vacuum spacetimes. First the linear dragging caused by a simple cylindrical pulse is investigated. Surprisingly strong transversal effects of the pulse are exhibited. The angular momentum in cylindrically symmet... |
0811.1376 | Roland Steinbauer | Roland Steinbauer, James A. Vickers | On the Geroch-Traschen class of metrics | LaTeX, 22 pages | Class.Quant.Grav.26:065001,2009 | 10.1088/0264-9381/26/6/065001 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare two approaches to Semi-Riemannian metrics of low regularity. The
maximally "reasonable" distributional setting of Geroch and Traschen is shown
to be consistently contained in the more general setting of nonlinear
distributional geometry in the sense of Colombeau.
| [
{
"created": "Sun, 9 Nov 2008 21:46:47 GMT",
"version": "v1"
}
] | 2011-06-07 | [
[
"Steinbauer",
"Roland",
""
],
[
"Vickers",
"James A.",
""
]
] | We compare two approaches to Semi-Riemannian metrics of low regularity. The maximally "reasonable" distributional setting of Geroch and Traschen is shown to be consistently contained in the more general setting of nonlinear distributional geometry in the sense of Colombeau. |
gr-qc/0006039 | Cenalo Vaz | Cenalo Vaz and Louis Witten | The Quantum States and the Statistical Entropy of the Charged Black Hole | 31 pages, 3 figures, PHYZZX macros. Comments on the wave-functional
in the interior and one reference added. To appear in Phys. Rev. D | Phys.Rev. D63 (2001) 024008 | 10.1103/PhysRevD.63.024008 | UATP-03/00 | gr-qc hep-th | null | We quantize the Reissner-Nordstr\"om black hole using an adaptation of
Kucha\v{r}'s canonical decomposition of the Kruskal extension of the
Schwarzschild black hole. The Wheeler-DeWitt equation turns into a functional
Schroedinger equation in Gaussian time by coupling the gravitational field to a
reference fluid or d... | [
{
"created": "Mon, 12 Jun 2000 11:31:29 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Oct 2000 12:35:53 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Vaz",
"Cenalo",
""
],
[
"Witten",
"Louis",
""
]
] | We quantize the Reissner-Nordstr\"om black hole using an adaptation of Kucha\v{r}'s canonical decomposition of the Kruskal extension of the Schwarzschild black hole. The Wheeler-DeWitt equation turns into a functional Schroedinger equation in Gaussian time by coupling the gravitational field to a reference fluid or dus... |
1508.05083 | Iv\'an E. S\'anchez G. | Emiliano Marachlian, Iv\'an E. S\'anchez G. and Osvaldo P. Santill\'an | Emergent Universe as an interaction in the dark sector | 15 pages, 8 figures | Modern Physics Letters A (MPLA), vol. 32, 28 (2017) | 10.1142/S0217732317501528 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmological scenario where dark matter interacts with a variable vacuum
energy for a spatially flat Friedmann-Robertson-Walker space-time is proposed
and analysed to show that with a linear equation of state and a particular
interaction in the dark sector it is possible to get a model of an Emergent
Universe. In a... | [
{
"created": "Thu, 20 Aug 2015 19:41:59 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Sep 2017 17:10:18 GMT",
"version": "v2"
}
] | 2017-09-11 | [
[
"Marachlian",
"Emiliano",
""
],
[
"G.",
"Iván E. Sánchez",
""
],
[
"Santillán",
"Osvaldo P.",
""
]
] | A cosmological scenario where dark matter interacts with a variable vacuum energy for a spatially flat Friedmann-Robertson-Walker space-time is proposed and analysed to show that with a linear equation of state and a particular interaction in the dark sector it is possible to get a model of an Emergent Universe. In add... |
1602.04476 | Emanuele Berti | Emanuele Berti | Viewpoint: The First Sounds of Merging Black Holes | APS Physics Viewpoint article on the LIGO gravitational wave
detection paper. I would like to dedicate this Viewpoint to the memory of
Steve Detweiler. I wish he could celebrate with us. v2: Correction of a
statement on tests of general relativity. v3: Minor rephrasing of a sentence.
Animations and a better loo... | APS Physics 9 (2016) 17 | 10.1103/Physics.9.17 | null | gr-qc astro-ph.HE hep-th physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted by the merger of two black holes have been
detected, setting the course for a new era of observational astrophysics.
| [
{
"created": "Sun, 14 Feb 2016 17:07:05 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Feb 2016 01:16:47 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Mar 2016 22:10:10 GMT",
"version": "v3"
}
] | 2016-03-16 | [
[
"Berti",
"Emanuele",
""
]
] | Gravitational waves emitted by the merger of two black holes have been detected, setting the course for a new era of observational astrophysics. |
1503.02858 | Roberto Casadio | Roberto Casadio, Octavian Micu, Dejan Stojkovic | Horizon Wave-Function and the Quantum Cosmic Censorship | RevTeX4, 6 pages, 2 figures. Typos corrected and comments added.
Version to appear in PLB | null | null | null | gr-qc astro-ph.HE hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Cosmic Censorship Conjecture by means of the horizon
wave-function (HWF) formalism. We consider a charged massive particle whose
quantum mechanical state is represented by a spherically symmetric Gaussian
wave-function, and restrict our attention to the superxtremal case (with
charge-to-mass ratio ... | [
{
"created": "Tue, 10 Mar 2015 10:57:18 GMT",
"version": "v1"
},
{
"created": "Mon, 25 May 2015 08:58:11 GMT",
"version": "v2"
}
] | 2015-05-26 | [
[
"Casadio",
"Roberto",
""
],
[
"Micu",
"Octavian",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We investigate the Cosmic Censorship Conjecture by means of the horizon wave-function (HWF) formalism. We consider a charged massive particle whose quantum mechanical state is represented by a spherically symmetric Gaussian wave-function, and restrict our attention to the superxtremal case (with charge-to-mass ratio $\... |
1204.6358 | Graeme Gossel | V. V. Flambaum, G. H. Gossel, G. F. Gribakin | Narrow resonances and black-hole-like absorption in a non-black-hole
metric | 6 pages, 4 figures | Phys. Rev. D 86, 044042 (2012) | 10.1103/PhysRevD.86.044042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A massive body with the Schwarzschild interior metric (perfect fluid of
constant density) develops a pressure singularity at the origin when the radius
of the body $R$ approaches $9r_s/8$, where $r_s$ is the Schwarzschild radius.
We show that a quantum scalar particle scattered in this gravitational field
possesses a... | [
{
"created": "Sat, 28 Apr 2012 02:13:29 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Aug 2012 06:43:41 GMT",
"version": "v2"
}
] | 2012-10-29 | [
[
"Flambaum",
"V. V.",
""
],
[
"Gossel",
"G. H.",
""
],
[
"Gribakin",
"G. F.",
""
]
] | A massive body with the Schwarzschild interior metric (perfect fluid of constant density) develops a pressure singularity at the origin when the radius of the body $R$ approaches $9r_s/8$, where $r_s$ is the Schwarzschild radius. We show that a quantum scalar particle scattered in this gravitational field possesses a d... |
1907.11732 | Daniele Vernieri | Bruno J. Barros, Elsa M. Teixeira, Daniele Vernieri | Bouncing cosmology in $f(R,\mathcal{G})$ gravity by order reduction | v1: 7 pages; v2: 8 pages. Matches published version in Annals of
Physics | Annals of Physics 419, 168231 (2020) | 10.1016/j.aop.2020.168231 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A bouncing universe is a viable candidate to solve the initial singularity
problem. Here we consider bouncing solutions in the context of
$f(R,\mathcal{G})$ gravity by using an order reduction technique which allows
one to find solutions that are perturbatively close to General Relativity. This
procedure also acts as... | [
{
"created": "Fri, 26 Jul 2019 18:00:07 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2020 16:12:59 GMT",
"version": "v2"
}
] | 2020-06-24 | [
[
"Barros",
"Bruno J.",
""
],
[
"Teixeira",
"Elsa M.",
""
],
[
"Vernieri",
"Daniele",
""
]
] | A bouncing universe is a viable candidate to solve the initial singularity problem. Here we consider bouncing solutions in the context of $f(R,\mathcal{G})$ gravity by using an order reduction technique which allows one to find solutions that are perturbatively close to General Relativity. This procedure also acts as a... |
1209.5000 | Prasanta Mahato Prin. | Prasanta Mahato | Axial Current and Noether Charge | 9 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A decade ago, a Lagrangian density has been proposed by the author where only
the local symmetries of the Lorentz subgroup of (A)ds group is retained. This
formalism has been found to produce some results encompassing that of standard
Einstein-Hilbert formalism. In the present article, the conserved axial vector
matt... | [
{
"created": "Sat, 22 Sep 2012 16:35:03 GMT",
"version": "v1"
}
] | 2012-09-25 | [
[
"Mahato",
"Prasanta",
""
]
] | A decade ago, a Lagrangian density has been proposed by the author where only the local symmetries of the Lorentz subgroup of (A)ds group is retained. This formalism has been found to produce some results encompassing that of standard Einstein-Hilbert formalism. In the present article, the conserved axial vector matter... |
1105.5081 | Alejandro Corichi | Alejandro Corichi, Edison Montoya | Coherent semiclassical states for loop quantum cosmology | 37 pages, 7 figures | Phys.Rev.D84:044021,2011 | 10.1103/PhysRevD.84.044021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spatially flat Friedman-Robertson-Walker (FRW) cosmological model with a
massless scalar field in loop quantum cosmology admits a description in terms
of a completely solvable model. This has been used to prove that: i) the
quantum bounce that replaces the big bang singularity is generic; ii) there is
an upper bo... | [
{
"created": "Wed, 25 May 2011 16:36:21 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"Corichi",
"Alejandro",
""
],
[
"Montoya",
"Edison",
""
]
] | The spatially flat Friedman-Robertson-Walker (FRW) cosmological model with a massless scalar field in loop quantum cosmology admits a description in terms of a completely solvable model. This has been used to prove that: i) the quantum bounce that replaces the big bang singularity is generic; ii) there is an upper boun... |
1108.1363 | Giovanni Marozzi Dr. | G. Marozzi, G. P. Vacca | Isotropic Observers and the Inflationary Backreaction Problem | 16 pages, latex. Comments added, errors and typos corrected, main
results unchanged. Version accepted for publication in Class. Quantum Grav | Class. Quantum Grav. 29, 115007 (2012) | 10.1088/0264-9381/29/11/115007 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an inflationary regime driven by a free massive inflaton we derive within
a genuinely gauge invariant approach the backreaction effects due to long
wavelength scalar fluctuations on the effective Hubble factor and equation of
state with respect to a class of observers which sees an inhomogeneous and
isotropic Univ... | [
{
"created": "Fri, 5 Aug 2011 16:18:48 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Oct 2011 17:30:46 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Apr 2012 18:10:13 GMT",
"version": "v3"
}
] | 2012-05-15 | [
[
"Marozzi",
"G.",
""
],
[
"Vacca",
"G. P.",
""
]
] | In an inflationary regime driven by a free massive inflaton we derive within a genuinely gauge invariant approach the backreaction effects due to long wavelength scalar fluctuations on the effective Hubble factor and equation of state with respect to a class of observers which sees an inhomogeneous and isotropic Univer... |
2004.10773 | Tom Stratton | Tom Stratton, Luiz C. S. Leite, Sam R. Dolan and Lu\'is C. B. Crispino | Series reduction method for scattering of planar waves by Kerr-Newman
black holes | 16 pages, 3 figures | Phys. Rev. D 102, 044025 (2020) | 10.1103/PhysRevD.102.044025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a practical method for evaluating the scattering amplitude
$f_s(\theta,\phi)$ that arises in the context of the scattering of scalar,
electromagnetic and gravitational planar waves by a rotating black hole. The
partial-wave representation of $f_s$ is a divergent series, but $f_s$ itself
diverges only at a ... | [
{
"created": "Wed, 22 Apr 2020 18:01:11 GMT",
"version": "v1"
}
] | 2020-08-19 | [
[
"Stratton",
"Tom",
""
],
[
"Leite",
"Luiz C. S.",
""
],
[
"Dolan",
"Sam R.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We present a practical method for evaluating the scattering amplitude $f_s(\theta,\phi)$ that arises in the context of the scattering of scalar, electromagnetic and gravitational planar waves by a rotating black hole. The partial-wave representation of $f_s$ is a divergent series, but $f_s$ itself diverges only at a si... |
1512.08426 | Wei-Tou Ni | Wei-Tou Ni | Equivalence Principles, Spacetime Structure and the Cosmic Connection | 47 pages, 3 tables | International Journal of Modern Physics D Vol. 25, No. 4 (2016)
1630002 (51 pages) | 10.1142/S0218271816300020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After reviewing the meaning of various equivalence principles and the
structure of electrodynamics, we give a fairly detailed account of the
construction of the light cone and a core metric from the equivalence principle
for the photon (no birefringence, no polarization rotation and no
amplification/attenuation in pr... | [
{
"created": "Mon, 28 Dec 2015 14:49:49 GMT",
"version": "v1"
}
] | 2016-03-08 | [
[
"Ni",
"Wei-Tou",
""
]
] | After reviewing the meaning of various equivalence principles and the structure of electrodynamics, we give a fairly detailed account of the construction of the light cone and a core metric from the equivalence principle for the photon (no birefringence, no polarization rotation and no amplification/attenuation in prop... |
0803.4449 | Sujitkumar Chatterjee | D. Panigrahi and S. Chatterjee | General relativistic plasma in higher dimensional space time | 17 pages, 3 figures | JCAP0808:032,2008 | 10.1088/1475-7516/2008/08/032 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | The well known (3+1) decomposition of Thorne and Macdonald is invoked to
write down the Einstein-Maxwell equations generalised to (d+1) dimensions and
also to formulate the plasma equations in a flat FRW like spacetime in higher
dimensions (HD). Assuming an equation of state for the background metric we
find solution... | [
{
"created": "Mon, 31 Mar 2008 12:39:18 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Aug 2008 13:14:40 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Panigrahi",
"D.",
""
],
[
"Chatterjee",
"S.",
""
]
] | The well known (3+1) decomposition of Thorne and Macdonald is invoked to write down the Einstein-Maxwell equations generalised to (d+1) dimensions and also to formulate the plasma equations in a flat FRW like spacetime in higher dimensions (HD). Assuming an equation of state for the background metric we find solutions ... |
1109.0842 | Hiromi Saida | Hiromi Saida | Universal Property of Quantum Gravity implied by Uniqueness Theorem of
Bekenstein-Hawking Entropy | 31 pages, 7 figures. Invited as a feature paper, and accepted as a
refereed paper, for the special issue "Black Hole Thermodynamics" in the
journal "Entropy", edited by J.Bekenstein | Entropy 2011, 13(9), 1611-1647 | 10.3390/e13091611 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper consists of three steps. In the first, we prove that the
Bekenstein-Hawking entropy is the unique expression of black hole entropy. Our
proof is constructed in the framework of thermodynamics without any statistical
discussion. In the second, intrinsic properties of quantum mechanics are shown,
which justi... | [
{
"created": "Mon, 5 Sep 2011 09:56:59 GMT",
"version": "v1"
}
] | 2011-09-06 | [
[
"Saida",
"Hiromi",
""
]
] | This paper consists of three steps. In the first, we prove that the Bekenstein-Hawking entropy is the unique expression of black hole entropy. Our proof is constructed in the framework of thermodynamics without any statistical discussion. In the second, intrinsic properties of quantum mechanics are shown, which justify... |
1006.2890 | Kristin Schleich | Kristin Schleich and Donald M. Witt | Singularities from the Topology and Differentiable Structure of
Asymptotically Flat Spacetimes | 22 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that certain asymptotically flat initial data sets with nontrivial
topology and/or differentiable structure collapse to form singularities. The
class of such initial data sets is characterized by a new smooth invariant, the
maximal Yamabe invariant, defined through smooth compactification of the
asymptotical... | [
{
"created": "Tue, 15 Jun 2010 05:14:28 GMT",
"version": "v1"
}
] | 2010-06-16 | [
[
"Schleich",
"Kristin",
""
],
[
"Witt",
"Donald M.",
""
]
] | We prove that certain asymptotically flat initial data sets with nontrivial topology and/or differentiable structure collapse to form singularities. The class of such initial data sets is characterized by a new smooth invariant, the maximal Yamabe invariant, defined through smooth compactification of the asymptotically... |
2210.10204 | Hai-Chao Zhang | Hai-Chao Zhang | Obtaining a scalar fifth force for matter via a conformal coupling to
the scalar field | 12 pages,1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In the framework of special relativity (SR), I propose that matter
conformally couples to a scalar field through the Lagrangian density of matter,
whether matter is characterized by classical or by quantum (statistical)
mechanics. The largest interaction strength of the scalar-mediated force can
achieve the order of ... | [
{
"created": "Tue, 18 Oct 2022 23:08:24 GMT",
"version": "v1"
}
] | 2022-10-20 | [
[
"Zhang",
"Hai-Chao",
""
]
] | In the framework of special relativity (SR), I propose that matter conformally couples to a scalar field through the Lagrangian density of matter, whether matter is characterized by classical or by quantum (statistical) mechanics. The largest interaction strength of the scalar-mediated force can achieve the order of $1... |
0904.1273 | Rainer Verch | Andreas Degner, Rainer Verch | Cosmological particle creation in states of low energy | 24 pages, 7 figures | J.Math.Phys.51:022302,2010 | 10.1063/1.3271106 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently proposed states of low energy provide a well-motivated class of
reference states for the quantized linear scalar field on cosmological
Friedmann-Robertson-Walker spacetimes. The low energy property of a state is
localized close to some value of the cosmological time coordinate. We present
calculations of... | [
{
"created": "Wed, 8 Apr 2009 07:39:41 GMT",
"version": "v1"
}
] | 2011-06-07 | [
[
"Degner",
"Andreas",
""
],
[
"Verch",
"Rainer",
""
]
] | The recently proposed states of low energy provide a well-motivated class of reference states for the quantized linear scalar field on cosmological Friedmann-Robertson-Walker spacetimes. The low energy property of a state is localized close to some value of the cosmological time coordinate. We present calculations of t... |
2002.04421 | P. A. Gonzalez | Ram\'on B\'ecar, P. A. Gonz\'alez and Yerko V\'asquez | Collision of particles near a three-dimensional rotating Ho\v{r}ava AdS
black hole | 14 pages, and 10 figures. arXiv admin note: substantial text overlap
with arXiv:1712.00868 | null | 10.1140/epjc/s10052-021-09041-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a three-dimensional rotating Ho\v{r}ava AdS black hole, that
corresponds to a Lorentz-violating version of the BTZ black hole and we analyze
the effect of the breaking of Lorentz invariance on the possibility that the
black hole can acts as a particle accelerator by analyzing the energy in the
center of m... | [
{
"created": "Sat, 8 Feb 2020 18:50:48 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Bécar",
"Ramón",
""
],
[
"González",
"P. A.",
""
],
[
"Vásquez",
"Yerko",
""
]
] | We consider a three-dimensional rotating Ho\v{r}ava AdS black hole, that corresponds to a Lorentz-violating version of the BTZ black hole and we analyze the effect of the breaking of Lorentz invariance on the possibility that the black hole can acts as a particle accelerator by analyzing the energy in the center of mas... |
1708.03253 | Richard Woodard | D. J. Brooker (Florida), N. C. Tsamis (Crete) and R. P. Woodard
(Florida) | Final Thoughts on the Power Spectra of Scalar Potential Models | 28 pages, 12 figures, uses LaTeX2e | Phys. Rev. D 96, 103531 (2017) | 10.1103/PhysRevD.96.103531 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give final shape to a recent formalism for deriving the functional forms
of the primordial power spectra of single-scalar potential models and theories
which are related to them by conformal transformation. An excellent analytic
approximation is derived for the nonlocal correction factors which are crucial
to capt... | [
{
"created": "Wed, 9 Aug 2017 05:51:37 GMT",
"version": "v1"
}
] | 2017-11-29 | [
[
"Brooker",
"D. J.",
"",
"Florida"
],
[
"Tsamis",
"N. C.",
"",
"Crete"
],
[
"Woodard",
"R. P.",
"",
"Florida"
]
] | We give final shape to a recent formalism for deriving the functional forms of the primordial power spectra of single-scalar potential models and theories which are related to them by conformal transformation. An excellent analytic approximation is derived for the nonlocal correction factors which are crucial to captur... |
2206.09000 | Giovanni Otalora | Yoelsy Leyva and Giovanni Otalora | Revisiting $f(R)$ gravity's rainbow: Inflation and primordial
fluctuations | 18 pages, 4 figures. Updated to match the published version in JCAP | JCAP 04 (2023) 030 | 10.1088/1475-7516/2023/04/030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study inflation and the generation of primordial fluctuations in $f(R)$
gravity's rainbow. We calculate the cosmological perturbations and then the
scalar and tensor primordial power spectrum. We contrast the predictions of the
model with the current observational data from PLANCK and BICEP/Keck.
Particularly, we ... | [
{
"created": "Fri, 17 Jun 2022 20:43:06 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Apr 2023 14:41:57 GMT",
"version": "v2"
}
] | 2023-04-13 | [
[
"Leyva",
"Yoelsy",
""
],
[
"Otalora",
"Giovanni",
""
]
] | We study inflation and the generation of primordial fluctuations in $f(R)$ gravity's rainbow. We calculate the cosmological perturbations and then the scalar and tensor primordial power spectrum. We contrast the predictions of the model with the current observational data from PLANCK and BICEP/Keck. Particularly, we fo... |
2402.13850 | Genly Le\'on | Kevin Marroqu\'in (Catolica del Norte U.), Genly Leon (Catolica del
Norte U. and DUT, Durban), Alfredo D. Millano (Catolica del Norte U.),
Claudio Michea (Catolica del Norte U.) and Andronikos Paliathanasis (DUT,
Durban and Catolica del Norte U.) | Conformal and Non-Minimal Couplings in Fractional Cosmology | 99 pages, 3 tables, 20 compound figures (This article belongs to the
Special Issue Advances in Fractional Modeling and Computation)
https://www.mdpi.com/journal/fractalfract/special_issues/4X6L41Z9X2 | Fractal Fract. 2024, 8(5), 253 | 10.3390/fractalfract8050253 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Fractional differential calculus is a mathematical tool that has found
applications in the study of social and physical behaviors considered
``anomalous''. It is often used when traditional integer derivatives models
fail to represent cases where the power law is observed accurately. Fractional
calculus must reflect ... | [
{
"created": "Wed, 21 Feb 2024 14:52:01 GMT",
"version": "v1"
},
{
"created": "Sat, 4 May 2024 20:09:30 GMT",
"version": "v2"
}
] | 2024-05-07 | [
[
"Marroquín",
"Kevin",
"",
"Catolica del Norte U."
],
[
"Leon",
"Genly",
"",
"Catolica del\n Norte U. and DUT, Durban"
],
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Michea",
"Claudio",
"",
"Catolica del Norte U."
],
... | Fractional differential calculus is a mathematical tool that has found applications in the study of social and physical behaviors considered ``anomalous''. It is often used when traditional integer derivatives models fail to represent cases where the power law is observed accurately. Fractional calculus must reflect no... |
1303.5167 | Arturo Avelino | Arturo Avelino, Ricardo Garcia-Salcedo, Tame Gonzalez, Ulises
Nucamendi, Israel Quiros | Bulk Viscous Matter-dominated Universes: Asymptotic Properties | 26 pages, 13 figures. Replacement with the final (published) version | JCAP 1308 (2013) 012 | 10.1088/1475-7516/2013/08/012 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By means of a combined use of the type Ia supernovae and H(z) data tests,
together with the study of the asymptotic properties in the equivalent phase
space - through the use of the dynamical systems tools - we demonstrate that
the bulk viscous matter-dominated scenario is not a good model to explain the
accepted cos... | [
{
"created": "Thu, 21 Mar 2013 05:03:04 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Aug 2013 03:52:16 GMT",
"version": "v2"
}
] | 2013-08-30 | [
[
"Avelino",
"Arturo",
""
],
[
"Garcia-Salcedo",
"Ricardo",
""
],
[
"Gonzalez",
"Tame",
""
],
[
"Nucamendi",
"Ulises",
""
],
[
"Quiros",
"Israel",
""
]
] | By means of a combined use of the type Ia supernovae and H(z) data tests, together with the study of the asymptotic properties in the equivalent phase space - through the use of the dynamical systems tools - we demonstrate that the bulk viscous matter-dominated scenario is not a good model to explain the accepted cosmo... |
1512.00096 | Seyed Ali Hosseini Mansoori | Seyed Ali Hosseini Mansoori, Behrouz Mirza, Mahdi Davoudi Darareh,
Sharooz Janbaz | Entanglement Thermodynamics of the Generalized Charged BTZ Black Hole | 6 pages | Int. J. Mod. Phys. A 31, 1650067 (2016) | 10.1142/S0217751X16500676 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the entanglement entropy for the generalized
charged BTZ black hole through the $AdS_{3}/CFT_{2}$ correspondence. Using the
holographic description of the entanglement entropy for the strip-subsystem in
boundary $CFT_{2}$, we will find the first law-like relation between the
variation of... | [
{
"created": "Mon, 30 Nov 2015 23:49:06 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Apr 2016 22:42:01 GMT",
"version": "v2"
},
{
"created": "Mon, 2 May 2016 09:13:12 GMT",
"version": "v3"
}
] | 2016-05-03 | [
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Darareh",
"Mahdi Davoudi",
""
],
[
"Janbaz",
"Sharooz",
""
]
] | In this paper, we investigate the entanglement entropy for the generalized charged BTZ black hole through the $AdS_{3}/CFT_{2}$ correspondence. Using the holographic description of the entanglement entropy for the strip-subsystem in boundary $CFT_{2}$, we will find the first law-like relation between the variation of h... |
gr-qc/9802003 | Claus Kiefer | C. Kiefer, D. Polarski, A.A. Starobinsky | Quantum-to-classical transition for fluctuations in the early Universe | 9 pages, LATEX | Int.J.Mod.Phys. D7 (1998) 455-462 | 10.1142/S0218271898000292 | Freiburg THEP-97/33 | gr-qc astro-ph hep-th quant-ph | null | According to the inflationary scenario for the very early Universe, all
inhomogeneities in the Universe are of genuine quantum origin. On the other
hand, looking at these inhomogeneities and measuring them, clearly no specific
quantum mechanical properties are observed. We show how the transition from
their inherent ... | [
{
"created": "Mon, 2 Feb 1998 09:00:03 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kiefer",
"C.",
""
],
[
"Polarski",
"D.",
""
],
[
"Starobinsky",
"A. A.",
""
]
] | According to the inflationary scenario for the very early Universe, all inhomogeneities in the Universe are of genuine quantum origin. On the other hand, looking at these inhomogeneities and measuring them, clearly no specific quantum mechanical properties are observed. We show how the transition from their inherent qu... |
2103.14141 | Thanasis Karakasis | Thanasis Karakasis, Eleftherios Papantonopoulos, Zi-Yu Tang and Bin
Wang | Exact Black Hole Solutions with a Conformally Coupled Scalar Field and
Dynamic Ricci Curvature in $f(R)$ Gravity Theories | Accepted for publication in EPJC | Eur. Phys. J. C 81, 897 (2021) | 10.1140/epjc/s10052-021-09717-1 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We report exact black hole solutions in asymptotically flat or (A)dS
four-dimensional spacetime with a conformally coupled self-interacting scalar
field in $f(R)$ gravity. We first consider the asymptotically flat model $f(R)
= R -2\alpha \sqrt{R}$ and derive an exact black hole solution. Then, we
consider the asympt... | [
{
"created": "Thu, 25 Mar 2021 21:19:40 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Apr 2021 16:17:41 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Jul 2021 14:21:47 GMT",
"version": "v3"
},
{
"created": "Mon, 11 Oct 2021 06:18:48 GMT",
"version": "v4"
}
] | 2021-10-25 | [
[
"Karakasis",
"Thanasis",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Tang",
"Zi-Yu",
""
],
[
"Wang",
"Bin",
""
]
] | We report exact black hole solutions in asymptotically flat or (A)dS four-dimensional spacetime with a conformally coupled self-interacting scalar field in $f(R)$ gravity. We first consider the asymptotically flat model $f(R) = R -2\alpha \sqrt{R}$ and derive an exact black hole solution. Then, we consider the asymptot... |
gr-qc/0408049 | Lukas Richterek | L. Richterek and J. Horsky | Weyl metrics and the generating conjecture | 10 pages, to appear in Czech.J. Phys | Czech.J.Phys. 54 (2004) 1451-1459 | 10.1007/s10582-004-1202-0 | null | gr-qc | null | By means of Ernst complex potential formalism it is shown, that previously
studied static axisymmetric Einstein-Maxwell fields obtained though the
application of the Horsky-Mitskievitch generating conjecture represent a
combination of Kinnersley's transformations [W. Kinnersley: J. Math. Phys. 14
(1973) 651]. New the... | [
{
"created": "Mon, 16 Aug 2004 19:45:04 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Richterek",
"L.",
""
],
[
"Horsky",
"J.",
""
]
] | By means of Ernst complex potential formalism it is shown, that previously studied static axisymmetric Einstein-Maxwell fields obtained though the application of the Horsky-Mitskievitch generating conjecture represent a combination of Kinnersley's transformations [W. Kinnersley: J. Math. Phys. 14 (1973) 651]. New theor... |
1807.02598 | Zahra Altaha Motahar | Zahra Altaha Motahar, Jose Luis Bl\'azquez-Salcedo, Burkhard Kleihaus
and Jutta Kunz | Axial Quasi-Normal Modes of Scalarized Neutron Stars with Realistic
Equations of State | null | Phys. Rev. D 98, 044032 (2018) | 10.1103/PhysRevD.98.044032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the axial quasi-normal modes of static neutron stars in scalar
tensor theory. In particular, we employ various realistic equations of state
including nuclear, hyperonic and hybrid matter. We investigate the fundamental
curvature mode and compare the results with those of General Relativity. We
find that th... | [
{
"created": "Sat, 7 Jul 2018 01:01:36 GMT",
"version": "v1"
}
] | 2018-08-29 | [
[
"Motahar",
"Zahra Altaha",
""
],
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We compute the axial quasi-normal modes of static neutron stars in scalar tensor theory. In particular, we employ various realistic equations of state including nuclear, hyperonic and hybrid matter. We investigate the fundamental curvature mode and compare the results with those of General Relativity. We find that the ... |
2011.02326 | Bogeun Gwak | Bogeun Gwak | Thermodynamics of Warped Anti-de Sitter Black Holes under Scattering of
Scalar Field | 15 pages, 6 figures | Chin. Phys. C 45 (2021) 4, 043106 | 10.1088/1674-1137/abdfbf | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thermodynamics and stability of the horizons in warped
anti-de Sitter black holes of the new massive gravity under the scattering of a
massive scalar field. Under scattering, conserved quantities can be transferred
from the scalar field to the black hole, which change the state of the black
hole. W... | [
{
"created": "Wed, 4 Nov 2020 14:56:27 GMT",
"version": "v1"
}
] | 2021-05-13 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the thermodynamics and stability of the horizons in warped anti-de Sitter black holes of the new massive gravity under the scattering of a massive scalar field. Under scattering, conserved quantities can be transferred from the scalar field to the black hole, which change the state of the black hole. We ... |
2202.01794 | Benjamin Leather | Rodrigo Panosso Macedo, Benjamin Leather, Niels Warburton, Barry
Wardell, An{\i}l Zengino\u{g}lu | Hyperboloidal method for frequency-domain self-force calculations | 25 pages, 19 figures; updated to reflect published version | Phys. Rev. D 105, 104033 (2022) | 10.1103/PhysRevD.105.104033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational self-force theory is the leading approach for modeling
gravitational wave emission from small mass-ratio compact binaries. This method
perturbatively expands the metric of the binary in powers of the mass ratio.
The source for the perturbations depends on the orbital configuration,
calculational approac... | [
{
"created": "Thu, 3 Feb 2022 19:00:07 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jun 2022 14:10:45 GMT",
"version": "v2"
}
] | 2022-06-02 | [
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Leather",
"Benjamin",
""
],
[
"Warburton",
"Niels",
""
],
[
"Wardell",
"Barry",
""
],
[
"Zenginoğlu",
"Anıl",
""
]
] | Gravitational self-force theory is the leading approach for modeling gravitational wave emission from small mass-ratio compact binaries. This method perturbatively expands the metric of the binary in powers of the mass ratio. The source for the perturbations depends on the orbital configuration, calculational approach,... |
1308.5156 | El\'ias Castellanos Dr. | E. Castellanos, J. I. Rivas, and V. Dom\'inguez-Rocha | Planck Scale Induced Speed of Sound in a Trapped Bose-Einstein
Condensate | null | EPL, 106 (2014) 60005 | 10.1209/0295-5075/106/60005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we analyze the corrections caused by an anomalous
dispersion relation, suggested in several quantum gravity models, upon the
speed of sound in a weakly interacting Bose--Einstein Condensate, trapped in a
potential of the form $V(r)\sim r^{2}$. We show that the corresponding ground
state energy an... | [
{
"created": "Fri, 23 Aug 2013 15:26:00 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jul 2014 16:28:41 GMT",
"version": "v2"
}
] | 2014-07-14 | [
[
"Castellanos",
"E.",
""
],
[
"Rivas",
"J. I.",
""
],
[
"Domínguez-Rocha",
"V.",
""
]
] | In the present work, we analyze the corrections caused by an anomalous dispersion relation, suggested in several quantum gravity models, upon the speed of sound in a weakly interacting Bose--Einstein Condensate, trapped in a potential of the form $V(r)\sim r^{2}$. We show that the corresponding ground state energy and ... |
0707.3778 | Branko Guberina | Branko Guberina | Renormalization group running cosmologies - from a scale setting to
holographic dark energy | Invited plenary talk given at the 2nd International Conference on
Quantum Theories and Renormalization Group in Gravity and Cosmology (IRGAC
2006), Barcelona, Catalonia, Spain, July 11-15, 2006 | null | null | null | gr-qc astro-ph hep-ph hep-th | null | A scale-dependent cosmological constant $\Lambda$ and the Newton constant G
emerge naturally in quantum field theory in a curved space-time background
leading to renormalization group running cosmologies. A scale-setting procedure
is discussed in these cosmological models and the interpretation of the scale
is emphas... | [
{
"created": "Wed, 25 Jul 2007 16:32:12 GMT",
"version": "v1"
}
] | 2007-07-27 | [
[
"Guberina",
"Branko",
""
]
] | A scale-dependent cosmological constant $\Lambda$ and the Newton constant G emerge naturally in quantum field theory in a curved space-time background leading to renormalization group running cosmologies. A scale-setting procedure is discussed in these cosmological models and the interpretation of the scale is emphasiz... |
gr-qc/0207020 | Janna Levin | Neil J. Cornish and Janna Levin | Comment on "Ruling out chaos in compact binary systems" | 1 page. Published Version | Phys.Rev.Lett. 89 (2002) 179001 | 10.1103/PhysRevLett.89.179001 | null | gr-qc astro-ph | null | In a recent Letter, Schnittman and Rasio argue that they have ruled out chaos
in compact binary systems since they find no positive Lyapunov exponents. In
stark constrast, we find that the chaos discovered in the original paper under
discussion, J.Levin, PRL, 84 3515 (2000), is confirmed by the presence of
positive L... | [
{
"created": "Wed, 3 Jul 2002 17:08:27 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Oct 2002 23:57:43 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Cornish",
"Neil J.",
""
],
[
"Levin",
"Janna",
""
]
] | In a recent Letter, Schnittman and Rasio argue that they have ruled out chaos in compact binary systems since they find no positive Lyapunov exponents. In stark constrast, we find that the chaos discovered in the original paper under discussion, J.Levin, PRL, 84 3515 (2000), is confirmed by the presence of positive Lya... |
2202.08839 | Georgios Doulis | Georgios Doulis, Florian Atteneder, Sebastiano Bernuzzi, Bernd
Br\"ugmann | Entropy-limited higher-order central scheme for neutron star merger
simulations | 22 pages, 21 figures | Phys. Rev. D 106, 024001 (2022) | 10.1103/PhysRevD.106.024001 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Numerical relativity simulations are the only way to calculate exact
gravitational waveforms from binary neutron star mergers and to design
templates for gravitational-wave astronomy. The accuracy of these numerical
calculations is critical in quantifying tidal effects near merger that are
currently one of the main s... | [
{
"created": "Thu, 17 Feb 2022 18:59:59 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Jul 2022 18:35:29 GMT",
"version": "v2"
}
] | 2022-07-05 | [
[
"Doulis",
"Georgios",
""
],
[
"Atteneder",
"Florian",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Brügmann",
"Bernd",
""
]
] | Numerical relativity simulations are the only way to calculate exact gravitational waveforms from binary neutron star mergers and to design templates for gravitational-wave astronomy. The accuracy of these numerical calculations is critical in quantifying tidal effects near merger that are currently one of the main sou... |
1406.1576 | Lorenzo Sebastiani | Shynaray Myrzakul, Ratbay Myrzakulov, Lorenzo Sebastiani | Coupled fluids model in FRW space-time | 13 pages, 2 figures, revised version, accepted in Astrophys.Space Sci | Astrophys.Space Sci. 353 (2014) 667-675 | 10.1007/s10509-014-2036-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze a two coupled fluids model by investigating several
solutions for accelerated universe in flat FRW space-time. One of the fluids
can be identified with the matter and the model possesses the standard matter
solution also. Beyond the removal of the coincidence problem, we will see how
the cou... | [
{
"created": "Fri, 6 Jun 2014 04:07:39 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jun 2014 05:48:01 GMT",
"version": "v2"
}
] | 2015-09-21 | [
[
"Myrzakul",
"Shynaray",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
]
] | In this paper, we analyze a two coupled fluids model by investigating several solutions for accelerated universe in flat FRW space-time. One of the fluids can be identified with the matter and the model possesses the standard matter solution also. Beyond the removal of the coincidence problem, we will see how the coupl... |
0901.1938 | Efrain Rojas Marcial | Ruben Cordero, Alberto Molgado and Efrain Rojas | Ostrogradski approach for the Regge-Teitelboim type cosmology | 11 pages, 2 figures, accepted for publication in Phys. Rev. D | Phys.Rev.D79:024024,2009 | 10.1103/PhysRevD.79.024024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an alternative geometric inspired derivation of the quantum
cosmology arising from a brane universe in the context of {\it geodetic
gravity}. We set up the Regge-Teitelboim model to describe our universe, and we
recover its original dynamics by thinking of such field theory as a
second-order derivative the... | [
{
"created": "Wed, 14 Jan 2009 07:13:31 GMT",
"version": "v1"
}
] | 2009-02-26 | [
[
"Cordero",
"Ruben",
""
],
[
"Molgado",
"Alberto",
""
],
[
"Rojas",
"Efrain",
""
]
] | We present an alternative geometric inspired derivation of the quantum cosmology arising from a brane universe in the context of {\it geodetic gravity}. We set up the Regge-Teitelboim model to describe our universe, and we recover its original dynamics by thinking of such field theory as a second-order derivative theor... |
1301.4778 | Spiros Cotsakis | Spiros Cotsakis | Asymptotic Poincar\'e compactification and finite-time singularities | v2: 14 pages, more references and more discussion, matches version to
appear in Grav. Cosm. arXiv admin note: text overlap with arXiv:1212.6737 | Grav. Cosm. 19 (2013) 240 | 10.1134/S0202289313040099 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an extension of the method of asymptotic decompositions of vector
fields with finite-time singularities by applying the central extension
technique of Poincar\'e to the dominant part of the vector field on approach to
the singularity. This leads to a bundle of fan-out asymptotic systems whose
equilibria at... | [
{
"created": "Mon, 21 Jan 2013 08:10:43 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2013 07:59:49 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Cotsakis",
"Spiros",
""
]
] | We provide an extension of the method of asymptotic decompositions of vector fields with finite-time singularities by applying the central extension technique of Poincar\'e to the dominant part of the vector field on approach to the singularity. This leads to a bundle of fan-out asymptotic systems whose equilibria at i... |
gr-qc/0302115 | Paulo M. S\' a | Paulo M. S\'a | Differential rotation of nonlinear r-modes | 9 pages, revtex4; section III revised, comments added in Introduction
and Conclusions, references updated; to appear in Phys. Rev. D | Phys.Rev. D69 (2004) 084001 | 10.1103/PhysRevD.69.084001 | null | gr-qc astro-ph | null | Differential rotation of r-modes is investigated within the nonlinear theory
up to second order in the mode amplitude in the case of a slowly-rotating,
Newtonian, barotropic, perfect-fluid star. We find a nonlinear extension of the
linear r-mode, which represents differential rotation that produces large scale
drifts... | [
{
"created": "Thu, 27 Feb 2003 12:57:48 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jan 2004 15:58:18 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Sá",
"Paulo M.",
""
]
] | Differential rotation of r-modes is investigated within the nonlinear theory up to second order in the mode amplitude in the case of a slowly-rotating, Newtonian, barotropic, perfect-fluid star. We find a nonlinear extension of the linear r-mode, which represents differential rotation that produces large scale drifts o... |
1909.03815 | Wen Zhao | Jin Qiao, Tao Zhu, Wen Zhao, Anzhong Wang | Waveform of gravitational waves in the ghost-free parity-violating
gravities | 8 pages, PRD accepted | Phys. Rev. D 100, 124058 (2019) | 10.1103/PhysRevD.100.124058 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GWs) provide an excellent opportunity to test the
gravity in the strong gravitational fields. In this article, we calculate the
waveform of GWs, produced by the coalescence of compact binaries, in an
extension of the Chern-Simons gravity by including higher derivatives of the
coupling scalar fiel... | [
{
"created": "Thu, 5 Sep 2019 23:25:49 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Sep 2019 03:22:32 GMT",
"version": "v2"
},
{
"created": "Sat, 21 Sep 2019 17:03:47 GMT",
"version": "v3"
},
{
"created": "Thu, 12 Dec 2019 18:25:42 GMT",
"version": "v4"
}
] | 2020-01-01 | [
[
"Qiao",
"Jin",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | Gravitational waves (GWs) provide an excellent opportunity to test the gravity in the strong gravitational fields. In this article, we calculate the waveform of GWs, produced by the coalescence of compact binaries, in an extension of the Chern-Simons gravity by including higher derivatives of the coupling scalar field.... |
1702.06155 | Martin Scholtz | Norman G\"urlebeck, Martin Scholtz | The Meissner effect for weakly isolated horizons | 7 pages, 4 figures | Phys.Rev.D 95 (2017) 064010 | 10.1103/PhysRevD.95.064010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes are important astrophysical objects describing an end state of
stellar evolution, which are observed frequently. There are theoretical
predictions that Kerr black holes with high spins expel magnetic fields.
However, Kerr black holes are pure vacuum solutions, which do not include
accretion disks, and add... | [
{
"created": "Mon, 20 Feb 2017 19:48:33 GMT",
"version": "v1"
}
] | 2017-03-13 | [
[
"Gürlebeck",
"Norman",
""
],
[
"Scholtz",
"Martin",
""
]
] | Black holes are important astrophysical objects describing an end state of stellar evolution, which are observed frequently. There are theoretical predictions that Kerr black holes with high spins expel magnetic fields. However, Kerr black holes are pure vacuum solutions, which do not include accretion disks, and addit... |
gr-qc/0502113 | Slava G. Turyshev | Slava G. Turyshev, Michael Shao, Kenneth L. Nordtvedt | Optical Design for the Laser Astrometric Test of Relativity | 11 pages, 7 figures, and 2 tables. Invited talk given at ``The XXII
Texas Symposium on Relativistic Astrophysics,'' Stanford University, December
13-17, 2004 | ``The XXII Texas Symposium on Relativistic Astrophysics,''
Stanford University, December 13-17, 2004, edited by P. Chen, E. Bloom, G.
Madejski, and V. Petrosian. SLAC-R-752, Stanford e-Conf #C041213, paper #0306 | null | null | gr-qc | null | This paper discusses the Laser Astrometric Test Of Relativity (LATOR)
mission. By using a combination of independent time-series of highly accurate
gravitational deflection of light in the immediate proximity to the Sun along
with measurements of the Shapiro time delay on the interplanetary scales (to a
precision res... | [
{
"created": "Fri, 25 Feb 2005 20:24:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Shao",
"Michael",
""
],
[
"Nordtvedt",
"Kenneth L.",
""
]
] | This paper discusses the Laser Astrometric Test Of Relativity (LATOR) mission. By using a combination of independent time-series of highly accurate gravitational deflection of light in the immediate proximity to the Sun along with measurements of the Shapiro time delay on the interplanetary scales (to a precision respe... |
1511.07142 | N.D. Hari Dass | N. D. Hari Dass and Harini Desiraju | Killing vectors of FLRW metric (in comoving coordinates) and zero modes
of the scalar Laplacian | 30 pages in JHEP style. In this third revision we have revised the
title, abstract, and the body, to stress the coordinate system used, as well
as remove the confusion between components and vectors in the earlier
version. The zero modes in greater detail using the notions of
well-definedness, square integrabil... | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on an examination of the solutions to the Killing Vector equations for
the FLRW-metric in co moving coordinates , it is conjectured and proved that
the components(in these coordinates) of Killing Vectors, when suitably scaled
by functions, are \emph{zero modes} of the corresponding \emph{scalar}
Laplacian. The ... | [
{
"created": "Mon, 23 Nov 2015 09:06:00 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Dec 2015 09:10:43 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Feb 2016 03:26:31 GMT",
"version": "v3"
}
] | 2016-02-29 | [
[
"Dass",
"N. D. Hari",
""
],
[
"Desiraju",
"Harini",
""
]
] | Based on an examination of the solutions to the Killing Vector equations for the FLRW-metric in co moving coordinates , it is conjectured and proved that the components(in these coordinates) of Killing Vectors, when suitably scaled by functions, are \emph{zero modes} of the corresponding \emph{scalar} Laplacian. The co... |
gr-qc/9510065 | Laurent Querella | Jacques Demaret, Laurent Querella (Institut d'Astrophysique de Liege) | Hamiltonian Formulation of Bianchi Cosmological Models in Quadratic
Theories of Gravity | Latex, 29 pages, accepted for publication in Classical and Quantum
Gravity | Class.Quant.Grav. 12 (1995) 3085-3102 | 10.1088/0264-9381/12/12/023 | COSMO-LQ-95-07 | gr-qc | null | We use Boulware's Hamiltonian formalism of quadratic gravity theories in
order to analyze the classical behaviour of Bianchi cosmological models for a
Lagrangian density containing quadratic terms in the curvature. For this
purpose we define a canonical transformation which leads to a clear distinction
between two ma... | [
{
"created": "Tue, 31 Oct 1995 13:11:04 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Demaret",
"Jacques",
"",
"Institut d'Astrophysique de Liege"
],
[
"Querella",
"Laurent",
"",
"Institut d'Astrophysique de Liege"
]
] | We use Boulware's Hamiltonian formalism of quadratic gravity theories in order to analyze the classical behaviour of Bianchi cosmological models for a Lagrangian density containing quadratic terms in the curvature. For this purpose we define a canonical transformation which leads to a clear distinction between two main... |
gr-qc/0505162 | Margarita Safonova Dr. | Z. Turakulov, M. Safonova | Motion of a Vector Particle in a Curved Spacetime. II First Order
Correction to a Geodesic in a Schwarzschild Background | 14 pages, LaTeX2e, second paper in the series (the first one:
gr-qc/0110067), replaced with typos and style corrected version, accepted in
MPLA | Mod.Phys.Lett. A20 (2005) 2785-2798 | 10.1142/S0217732305018852 | IPM preprint no. is IPM/P-2005/049 | gr-qc | null | The influence of spin on a photon's motion in a Schwarzschild and FRW
spacetimes is studied. The first order correction to the geodesic motion is
found. It is shown that unlike the world-lines of spinless particles, the
photons world-lines do not lie in a plane.
| [
{
"created": "Tue, 31 May 2005 15:43:04 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Oct 2005 10:30:45 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Turakulov",
"Z.",
""
],
[
"Safonova",
"M.",
""
]
] | The influence of spin on a photon's motion in a Schwarzschild and FRW spacetimes is studied. The first order correction to the geodesic motion is found. It is shown that unlike the world-lines of spinless particles, the photons world-lines do not lie in a plane. |
gr-qc/9801005 | Student | I-Ching Yang | On the energy of the de Sitter-Schwarzschild black hole | Latex file,9 pages,include 1 figure file | Chin.J.Phys. 38 (2000) 1040-1043 | null | NCKU-HEP/97-05 | gr-qc | null | Using Einstein's and Weinberg's energy complex, we evaluate the energy
distribution of the vaccum nonsingularity black hole solution. The energy
distribution is positive everywhere and be equal to zero at origin.
| [
{
"created": "Mon, 5 Jan 1998 09:17:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Yang",
"I-Ching",
""
]
] | Using Einstein's and Weinberg's energy complex, we evaluate the energy distribution of the vaccum nonsingularity black hole solution. The energy distribution is positive everywhere and be equal to zero at origin. |
1703.09267 | Shahram Jalalzadeh | M. Fathi and S. Jalalzadeh | Quantum Hamilton-Jacobi cosmology and classical-quantum correlation | 10 pages, to appear in IJTP | null | 10.1007/s10773-017-3363-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | How the time evolution which is typical for classical cosmology emerges from
quantum cosmology? The answer is not trivial because the Wheeler-DeWitt
equation is time independent. A framework associating the quantum
Hamilton-Jacobi to the minisuperspace cosmological models has been introduced
in [1]. In this paper, we... | [
{
"created": "Mon, 27 Mar 2017 18:59:49 GMT",
"version": "v1"
}
] | 2017-04-26 | [
[
"Fathi",
"M.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | How the time evolution which is typical for classical cosmology emerges from quantum cosmology? The answer is not trivial because the Wheeler-DeWitt equation is time independent. A framework associating the quantum Hamilton-Jacobi to the minisuperspace cosmological models has been introduced in [1]. In this paper, we s... |
1901.08588 | Lucas Lombriser | Lucas Lombriser | On the cosmological constant problem | 5 pages; v2 matches published version | Phys. Lett. B 797, 134804 (2019) | 10.1016/j.physletb.2019.134804 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An additional variation of the Einstein-Hilbert action with respect to the
Planck mass provides a constraint on the average Ricci scalar that prevents
vacuum energy from gravitating. Consideration of the evolution of the
inhomogeneous matter distribution in the Universe with evaluation of the
averaging constraint on ... | [
{
"created": "Wed, 23 Jan 2019 19:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 15:33:11 GMT",
"version": "v2"
}
] | 2019-09-18 | [
[
"Lombriser",
"Lucas",
""
]
] | An additional variation of the Einstein-Hilbert action with respect to the Planck mass provides a constraint on the average Ricci scalar that prevents vacuum energy from gravitating. Consideration of the evolution of the inhomogeneous matter distribution in the Universe with evaluation of the averaging constraint on di... |
0905.3285 | Sergey S. Kokarev | Sergey S. Kokarev | Three lectures on Newton's laws | 22 pages, 9 figures, has been reported by parts on several Russian
conferences and seminars | Published in Russian, Collected scientific papers of RSEC Logos,
v1, 2006, pp.45-72 | null | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three small lectures are devoted to three Newton's laws, lying in the
foundation of classical mechanics. These laws are analyzed from the viewpoint
of our contemporary knowledge about space, time and physical interactions. The
lectures were delivered for students of YarGU in RSEC "Logos".
| [
{
"created": "Wed, 20 May 2009 11:52:50 GMT",
"version": "v1"
}
] | 2009-05-21 | [
[
"Kokarev",
"Sergey S.",
""
]
] | Three small lectures are devoted to three Newton's laws, lying in the foundation of classical mechanics. These laws are analyzed from the viewpoint of our contemporary knowledge about space, time and physical interactions. The lectures were delivered for students of YarGU in RSEC "Logos". |
2311.05766 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Quantization of spherically symmetric loop quantum gravity coupled to a
scalar field and a clock: the asymptotic limit | 8 pages, RevTex, no figures. To appear in Classical and Quantum
Gravity | Classical and Quantum Graivty 40, 245009 (2023) | 10.1088/1361-6382/ad0b9d | LSU-REL-110923 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue our work on the study of spherically symmetric loop quantum
gravity coupled to two spherically symmetric scalar fields, one which acts as a
clock. As a consequence of the presence of the latter, we can define a true
Hamiltonian for the theory. The spherically symmetric context allows to carry
out precise ... | [
{
"created": "Thu, 9 Nov 2023 22:22:00 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We continue our work on the study of spherically symmetric loop quantum gravity coupled to two spherically symmetric scalar fields, one which acts as a clock. As a consequence of the presence of the latter, we can define a true Hamiltonian for the theory. The spherically symmetric context allows to carry out precise de... |
gr-qc/0506100 | Sashideep Gutti | Sashideep Gutti | Gravitational Collapse of Inhomogeneous Dust in (2+1) Dimensions | Accepted for publication in CQG | Class.Quant.Grav. 22 (2005) 3223-3234 | 10.1088/0264-9381/22/16/007 | null | gr-qc | null | We examine the gravitational collapse of spherically symmetric inhomogeneous
dust in (2+1) dimensions, with cosmological constant. We obtain the analytical
expressions for the interior metric. We match the solution to a vacuum
exterior. We discuss the nature of the singularity formed by analyzing the
outgoing radial ... | [
{
"created": "Mon, 20 Jun 2005 04:33:54 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gutti",
"Sashideep",
""
]
] | We examine the gravitational collapse of spherically symmetric inhomogeneous dust in (2+1) dimensions, with cosmological constant. We obtain the analytical expressions for the interior metric. We match the solution to a vacuum exterior. We discuss the nature of the singularity formed by analyzing the outgoing radial nu... |
1604.03973 | Adam J. Christopherson | Adam J. Christopherson | Relating metric and covariant perturbation theories in $f(R)$ gravity | 17 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified theories of gravity have been invoked recently as an alternative to
dark energy, in an attempt to explain the apparent accelerated expansion of the
universe at the present time. In order to describe inhomogeneities in
cosmological models, cosmological perturbation theory is used, of which two
formalisms exis... | [
{
"created": "Wed, 13 Apr 2016 21:00:34 GMT",
"version": "v1"
}
] | 2016-04-15 | [
[
"Christopherson",
"Adam J.",
""
]
] | Modified theories of gravity have been invoked recently as an alternative to dark energy, in an attempt to explain the apparent accelerated expansion of the universe at the present time. In order to describe inhomogeneities in cosmological models, cosmological perturbation theory is used, of which two formalisms exist:... |
gr-qc/9910019 | Maurizio Gasperini | M. Gasperini | On the response of gravitational antennas to dilatonic waves | 10 pages, Latex, no figures | Phys.Lett. B470 (1999) 67-72 | 10.1016/S0370-2693(99)01309-X | BA-TH/99-363 | gr-qc hep-th | null | It is pointed out that the coupling of macroscopic test masses to the
gravi-dilaton background of string theory is non geodesic, in general, and
cannot be parametrized by a Brans-Dicke model of scalar-tensor gravity. The
response of gravitational antennas to dilatonic waves should be analyzed
through a generalized eq... | [
{
"created": "Wed, 6 Oct 1999 08:30:19 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gasperini",
"M.",
""
]
] | It is pointed out that the coupling of macroscopic test masses to the gravi-dilaton background of string theory is non geodesic, in general, and cannot be parametrized by a Brans-Dicke model of scalar-tensor gravity. The response of gravitational antennas to dilatonic waves should be analyzed through a generalized equa... |
2204.11384 | Motohiko Yoshimura | M.Yoshimura | Stronger gravity in the early universe | 5 pages | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Scalar-tensor theories of gravity that embrace conformal coupling to the
scalar curvature are the focal point of cosmology on discussions of inflation
and late-time accelerating universe. Although there exists a stringent
nucleo-synthesis constraint on conformal gravity, one can formulate how to
evade this difficulty... | [
{
"created": "Mon, 25 Apr 2022 00:44:19 GMT",
"version": "v1"
}
] | 2022-04-26 | [
[
"Yoshimura",
"M.",
""
]
] | Scalar-tensor theories of gravity that embrace conformal coupling to the scalar curvature are the focal point of cosmology on discussions of inflation and late-time accelerating universe. Although there exists a stringent nucleo-synthesis constraint on conformal gravity, one can formulate how to evade this difficulty b... |
2112.08905 | Gabriele Barca | Gabriele Barca, Eleonora Giovannetti, Giovanni Montani | Comparison of the Semiclassical and Quantum Dynamics of the Bianchi I
Cosmology in the Polymer and GUP Extended Paradigms | 23 pages, 6 figures. Invited contribution to IJGMMP special issue for
the conference "Geometric Foundations of Gravity 2021" (Tartu, Estonia, June
28-July 2, 2021). New upload to match published version | IJGMMP 19, 07, 2250097 (2022) | 10.1142/S0219887822500979 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare in some detail Polymer Quantum Mechanics and the Generalized
Uncertainty Principle approach to clarify to what extent we can treat them on
the same footing. We show that, while on a semiclassical level they may be
formulated as similar modifications of the Poisson algebra, on a quantum level
they intrinsic... | [
{
"created": "Thu, 16 Dec 2021 14:23:45 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2022 14:12:20 GMT",
"version": "v2"
}
] | 2022-05-20 | [
[
"Barca",
"Gabriele",
""
],
[
"Giovannetti",
"Eleonora",
""
],
[
"Montani",
"Giovanni",
""
]
] | We compare in some detail Polymer Quantum Mechanics and the Generalized Uncertainty Principle approach to clarify to what extent we can treat them on the same footing. We show that, while on a semiclassical level they may be formulated as similar modifications of the Poisson algebra, on a quantum level they intrinsical... |
1305.4851 | Zacharias Roupas | Zacharias Roupas | Gravitational-thermodynamic instabilities of isothermal spheres in dS
and AdS | Proceedings contribution; much of the work presented in this talk was
elaborated jointly with Minos Axenides and George Georgiou, and appears
analytically elsewhere | Proceedings of the Barcelona Postgrad Encounters on Fundamental
Physics, editors Daniel Fernandez, Markus B. Frob, Ivan Latella and Aldo
Dector, Facultat de Fisica, Universitat de Barcelona, p.31-42, 2013 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thermodynamical stability of fluid spheres is studied in the presence of a
cosmological constant, both in the Newtonian limit, as well as in General
Relativity. In all cases, an increase of the cosmological constant tends to
stabilize the system, making asymptotically de Sitter space more
thermodynamically stable tha... | [
{
"created": "Tue, 21 May 2013 15:14:08 GMT",
"version": "v1"
}
] | 2013-05-22 | [
[
"Roupas",
"Zacharias",
""
]
] | Thermodynamical stability of fluid spheres is studied in the presence of a cosmological constant, both in the Newtonian limit, as well as in General Relativity. In all cases, an increase of the cosmological constant tends to stabilize the system, making asymptotically de Sitter space more thermodynamically stable than ... |
gr-qc/0206015 | Sergiu Vacaru | Sergiu Vacaru and D. E. Goksel | Horizons and Geodesics of Black Ellipsoids with Anholonomic Conformal
Symmetries | 14 pages, latex2e, file modified for publication in "Progress in
Mathematical Physics", Ed. Frank Columbus (Nova Science Publishers, NY, 2003) | "Focus on Mathematical Physics, Research 2004", Ed. Charles V.
Benton (Nova Science Publishers, NY, 2004), pp. 1-14 | null | null | gr-qc astro-ph hep-th math-ph math.DG math.MP | null | The horizon and geodesic structure of static configurations generated by
anisotropic conformal transforms of the Schwarzschild metric is analyzed. We
construct the maximal analytic extension of such off--diagonal vacuum metrics
and conclude that for small deformations there are different classes of vacuum
solutions o... | [
{
"created": "Wed, 5 Jun 2002 20:02:18 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jul 2003 16:35:58 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vacaru",
"Sergiu",
""
],
[
"Goksel",
"D. E.",
""
]
] | The horizon and geodesic structure of static configurations generated by anisotropic conformal transforms of the Schwarzschild metric is analyzed. We construct the maximal analytic extension of such off--diagonal vacuum metrics and conclude that for small deformations there are different classes of vacuum solutions of ... |
1203.3761 | Claudio Simeone | Claudio Simeone | Cylindrical thin-shell wormholes and energy conditions | 9 pages; slightly improved version of the article accepted in Int. J.
Mod. Phys. D | null | 10.1142/S0218271812500150 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the impossibility of cylindrical thin-shell wormholes supported by
matter satisfying the energy conditions everywhere, under reasonable
assumptions about the asymptotic behaviour of the - in general different -
metrics at each side of the throat. In particular, we reproduce for singular
sources previous resu... | [
{
"created": "Fri, 16 Mar 2012 16:39:58 GMT",
"version": "v1"
}
] | 2012-03-19 | [
[
"Simeone",
"Claudio",
""
]
] | We prove the impossibility of cylindrical thin-shell wormholes supported by matter satisfying the energy conditions everywhere, under reasonable assumptions about the asymptotic behaviour of the - in general different - metrics at each side of the throat. In particular, we reproduce for singular sources previous result... |
0910.0594 | Davood Momeni Dr | D.Momeni | Cosmic strings in a model of non-relativistic gravity | 30pages,It has been accepted for publication in International Journal
of Theoretical Physics-Extended version with 2 new sections about
(Thermodynamics and Dark energy in Horava-Lifshitz gravity),(About the
existence of non-static cylindrical solutions) | Int.J.Theor.Phys.50:1493-1514,2011 | 10.1007/s10773-010-0659-9 | null | gr-qc hep-th math-ph math.CA math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ho$\check{\textbf{r}}$ava proposed a non-relativistic renormalizable theory
of gravitation, which is reduced to general relativity (GR) in large distances
(infra-red regime (IR)). It is believed that this theory is an ultra-violet
(UV) completion for the classical theory of gravitation. In this paper, after a
brief r... | [
{
"created": "Sun, 4 Oct 2009 10:39:52 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Dec 2010 14:13:56 GMT",
"version": "v10"
},
{
"created": "Sat, 10 Oct 2009 06:20:01 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Nov 2009 10:01:09 GMT",
"version": "v3"
},
{
"c... | 2011-04-11 | [
[
"Momeni",
"D.",
""
]
] | Ho$\check{\textbf{r}}$ava proposed a non-relativistic renormalizable theory of gravitation, which is reduced to general relativity (GR) in large distances (infra-red regime (IR)). It is believed that this theory is an ultra-violet (UV) completion for the classical theory of gravitation. In this paper, after a brief rev... |
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