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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2110.05938 | Pascal Koiran | Pascal Koiran | Infall time in the Eddington-Finkelstein metric, with application to
Einstein-Rosen bridges | To appear in International Journal of Modern Physics D | null | 10.1142/S0218271821501066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Eddington-Finkelstein metric is obtained from the Schwarzschild metric by
a change of the time variable. It is well known that a test mass falling into a
black hole does not reach the event horizon for any finite value of the
Schwarzschild time variable $t$. By contrast, we show that the event horizon is
reached ... | [
{
"created": "Sat, 9 Oct 2021 15:35:11 GMT",
"version": "v1"
}
] | 2021-10-13 | [
[
"Koiran",
"Pascal",
""
]
] | The Eddington-Finkelstein metric is obtained from the Schwarzschild metric by a change of the time variable. It is well known that a test mass falling into a black hole does not reach the event horizon for any finite value of the Schwarzschild time variable $t$. By contrast, we show that the event horizon is reached fo... |
gr-qc/0111026 | Sergio M. C. V. Goncalves | Sergio M. C. V. Goncalves (Yale), Sanjay Jhingan (YITP, Japan), and
Giulio Magli (Milano, Italy) | The spectrum of endstates of gravitational collapse with tangential
stresses | 9 pages, revtex4; accepted for publication in Phys. Rev. D | Phys.Rev. D65 (2002) 064011 | 10.1103/PhysRevD.65.064011 | null | gr-qc | null | The final state--black hole or naked singularity--of the gravitational
collapse of a marginally bound matter configuration in the presence of
tangential stresses is classified, in full generality, in terms of the initial
data and equation of state. If the tangential pressure is sufficiently strong,
configurations tha... | [
{
"created": "Thu, 8 Nov 2001 17:14:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Goncalves",
"Sergio M. C. V.",
"",
"Yale"
],
[
"Jhingan",
"Sanjay",
"",
"YITP, Japan"
],
[
"Magli",
"Giulio",
"",
"Milano, Italy"
]
] | The final state--black hole or naked singularity--of the gravitational collapse of a marginally bound matter configuration in the presence of tangential stresses is classified, in full generality, in terms of the initial data and equation of state. If the tangential pressure is sufficiently strong, configurations that ... |
gr-qc/9905104 | Dzhunushaliev Vladimir | V. Dzhunushaliev and D. Singleton | Experimental test for extra dimensions in Kaluza-Klein gravity | 11 pages, 3 PS.figures, REVTEX, the quality of the figures are
improved | Gen.Rel.Grav. 32 (2000) 271-280 | 10.1023/A:1001943725858 | null | gr-qc | null | 5D Kaluza-Klein gravity has several nonasymptotically flat solutions which
generally, possessed both electric and magnetic charges. In this paper we
suggest that these solutions can act as quantum virtual handles (wormholes) in
spacetime foam models. By applying a sufficently large, external electric
and/or magnetic ... | [
{
"created": "Fri, 28 May 1999 08:00:33 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Feb 2000 09:21:17 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Singleton",
"D.",
""
]
] | 5D Kaluza-Klein gravity has several nonasymptotically flat solutions which generally, possessed both electric and magnetic charges. In this paper we suggest that these solutions can act as quantum virtual handles (wormholes) in spacetime foam models. By applying a sufficently large, external electric and/or magnetic fi... |
0909.3924 | Junko Ohashi | Junko Ohashi, Shinji Tsujikawa | Assisted dark energy | 14 pages, 12 figures, version to appear in Physical Review D | Phys.Rev.D80:103513,2009 | 10.1103/PhysRevD.80.103513 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological scaling solutions, which give rise to a scalar-field density
proportional to a background fluid density during radiation and matter eras,
are attractive to alleviate the energy scale problem of dark energy. In the
presence of multiple scalar fields the scaling solution can exit to the epoch
of cosmic acc... | [
{
"created": "Tue, 22 Sep 2009 07:30:02 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Oct 2009 12:31:42 GMT",
"version": "v2"
}
] | 2010-03-25 | [
[
"Ohashi",
"Junko",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | Cosmological scaling solutions, which give rise to a scalar-field density proportional to a background fluid density during radiation and matter eras, are attractive to alleviate the energy scale problem of dark energy. In the presence of multiple scalar fields the scaling solution can exit to the epoch of cosmic accel... |
0804.3157 | Guillermo A. Mena Marugan | M. Martin-Benito, G. A. Mena Marugan, and T. Pawlowski | Loop Quantization of Vacuum Bianchi I Cosmology | 10 pages, version accepted for publication in Physical Review D | Phys.Rev.D78:064008,2008 | 10.1103/PhysRevD.78.064008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the loop quantization of the family of vacuum Bianchi I
spacetimes, a gravitational system whose classical solutions describe
homogeneous anisotropic cosmologies. We rigorously construct the operator that
represents the Hamiltonian constraint, showing that the states of zero volume
completely decouple from... | [
{
"created": "Sat, 19 Apr 2008 16:21:01 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Aug 2008 12:28:29 GMT",
"version": "v2"
}
] | 2009-02-20 | [
[
"Martin-Benito",
"M.",
""
],
[
"Marugan",
"G. A. Mena",
""
],
[
"Pawlowski",
"T.",
""
]
] | We analyze the loop quantization of the family of vacuum Bianchi I spacetimes, a gravitational system whose classical solutions describe homogeneous anisotropic cosmologies. We rigorously construct the operator that represents the Hamiltonian constraint, showing that the states of zero volume completely decouple from t... |
gr-qc/0008065 | Lior M. Burko | Lior M. Burko (Caltech), Yuk Tung Liu (Caltech), and Yoav Soen
(Technion) | Self force on charges in the spacetime of spherical shells | 23 pages, 7 Encapsulated PostScript figures, RevTeX | Phys.Rev. D63 (2001) 024015 | 10.1103/PhysRevD.63.024015 | null | gr-qc | null | We study the self force acting on static electric or scalar charges inside or
outside a spherical, massive, thin shell. The regularization of the self force
is done using the recently-proposed Mode Sum Regularization Prescription. In
all cases the self force acting on the charge is repulsive. We find that in the
scal... | [
{
"created": "Sun, 27 Aug 2000 22:19:37 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Burko",
"Lior M.",
"",
"Caltech"
],
[
"Liu",
"Yuk Tung",
"",
"Caltech"
],
[
"Soen",
"Yoav",
"",
"Technion"
]
] | We study the self force acting on static electric or scalar charges inside or outside a spherical, massive, thin shell. The regularization of the self force is done using the recently-proposed Mode Sum Regularization Prescription. In all cases the self force acting on the charge is repulsive. We find that in the scalar... |
2111.07704 | Sourav Chowdhury Roy | Sourav Roy Chowdhury, Maxim Khlopov | Gravitational waves in the modified gravity | Prepared for Proceedings of XXIV Bled Workshop | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We have taken a modified version of the Einstein Hilbert action, $ f(R,
T^\phi) $ gravity under consideration, where $T^\phi$ is the energy-momentum
tensor trace for the scalar field under consideration. The structural behaviour
of the scalar field considered varies with the form of the potential. The
number of polar... | [
{
"created": "Mon, 15 Nov 2021 12:21:03 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2021 06:37:07 GMT",
"version": "v2"
}
] | 2021-11-22 | [
[
"Chowdhury",
"Sourav Roy",
""
],
[
"Khlopov",
"Maxim",
""
]
] | We have taken a modified version of the Einstein Hilbert action, $ f(R, T^\phi) $ gravity under consideration, where $T^\phi$ is the energy-momentum tensor trace for the scalar field under consideration. The structural behaviour of the scalar field considered varies with the form of the potential. The number of polariz... |
1405.1378 | Zeeshan Yousaf | M. Sharif and Z. Yousaf | Stability of a Class of Non-Static Axial Self-Gravitating Systems in
$f(R)$ Gravity | Astrophysics and Space Science, 24 pages | Astrophys. Space Sci. 352(2014)943 | 10.1007/s10509-014-1985-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze stability regions of a non-static restricted class
of axially symmetric spacetime with anisotropic matter distribution. We
consider $f(R)=R+{\epsilon}R^2$ model and assume hydrostatic equilibrium of the
axial self-gravitating system at large past time. Considering perturbation from
hydrostat... | [
{
"created": "Tue, 3 Dec 2013 09:44:39 GMT",
"version": "v1"
},
{
"created": "Wed, 7 May 2014 03:30:08 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Jun 2014 11:18:07 GMT",
"version": "v3"
}
] | 2014-11-19 | [
[
"Sharif",
"M.",
""
],
[
"Yousaf",
"Z.",
""
]
] | In this paper, we analyze stability regions of a non-static restricted class of axially symmetric spacetime with anisotropic matter distribution. We consider $f(R)=R+{\epsilon}R^2$ model and assume hydrostatic equilibrium of the axial self-gravitating system at large past time. Considering perturbation from hydrostatic... |
2008.06733 | Jun-Jin Peng | Jun-Jin Peng, Chang-Li Zou, Hui-Fa Liu | A Komar-like integral for mass and angular momentum of asymptotically
AdS black holes in Einstein gravity | 27 pages, No figures, minor revision to V1 | Phys. Scr. 96 (2021) 125207 | 10.1088/1402-4896/ac1cd1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to enhance the conventional Komar integral to
asymptotically anti-de Sitter (AdS) black holes. In order to do so, we first
obtain a potential that is the linear combination of the usual Komar potential
with two third-order derivative terms generated by the action of the
d'Alembertian oper... | [
{
"created": "Sat, 15 Aug 2020 15:17:36 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 2020 23:31:19 GMT",
"version": "v2"
}
] | 2023-05-24 | [
[
"Peng",
"Jun-Jin",
""
],
[
"Zou",
"Chang-Li",
""
],
[
"Liu",
"Hui-Fa",
""
]
] | The purpose of this paper is to enhance the conventional Komar integral to asymptotically anti-de Sitter (AdS) black holes. In order to do so, we first obtain a potential that is the linear combination of the usual Komar potential with two third-order derivative terms generated by the action of the d'Alembertian operat... |
2407.02046 | Ryuya Kudo | Ryuya Kudo, Hideki Asada | Correspondence between two exact gravitational lens equations in a
static and spherically symmetric spacetime | 7 pages, 9 figures | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Virbhadra and Ellis have proposed an exact equation (referred to as VE
equation) for the gravitational lens in a static and spherically symmetric
spacetime [Phys. Rev. D 62,084003 (2000)], whereas an improved equation
(referred to as BTOA equation) has been derived by Bozza [Phys. Rev. D 78,
103005 (2008)] and later ... | [
{
"created": "Tue, 2 Jul 2024 08:19:17 GMT",
"version": "v1"
}
] | 2024-07-03 | [
[
"Kudo",
"Ryuya",
""
],
[
"Asada",
"Hideki",
""
]
] | Virbhadra and Ellis have proposed an exact equation (referred to as VE equation) for the gravitational lens in a static and spherically symmetric spacetime [Phys. Rev. D 62,084003 (2000)], whereas an improved equation (referred to as BTOA equation) has been derived by Bozza [Phys. Rev. D 78, 103005 (2008)] and later by... |
gr-qc/9711073 | Thomas Kloesch | T. Kloesch and T. Strobl | Complete Classification of 1+1 Gravity Solutions | 3 pages, LaTeX, 1 figure, Talk presented at the Eighth Marcel
Grossmann Meeting (MG8), Jerusalem, June 1997 | null | null | TUW-97-18, PITHA 97/41 | gr-qc | null | A classification of the maximally extended solutions for 1+1 gravity models
(comprising e.g. generalized dilaton gravity as well as models with non-trivial
torsion) is presented. No restrictions are placed on the topology of the
arising solutions, and indeed it is found that for generic models solutions on
non-compac... | [
{
"created": "Tue, 25 Nov 1997 12:01:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kloesch",
"T.",
""
],
[
"Strobl",
"T.",
""
]
] | A classification of the maximally extended solutions for 1+1 gravity models (comprising e.g. generalized dilaton gravity as well as models with non-trivial torsion) is presented. No restrictions are placed on the topology of the arising solutions, and indeed it is found that for generic models solutions on non-compact ... |
1402.6252 | Thomas B\"ackdahl | Lars Andersson, Thomas B\"ackdahl and Pieter Blue | Second order symmetry operators | 34 pages. Mathematica notebook available from
http://hdl.handle.net/10283/541 | Class. Quantum Grav. 31 135015 (2014) | 10.1088/0264-9381/31/13/135015 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using systematic calculations in spinor language, we obtain simple
descriptions of the second order symmetry operators for the conformal wave
equation, the Dirac-Weyl equation and the Maxwell equation on a curved four
dimensional Lorentzian manifold. The conditions for existence of symmetry
operators for the differen... | [
{
"created": "Tue, 25 Feb 2014 17:42:06 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jun 2014 13:12:40 GMT",
"version": "v2"
}
] | 2014-06-20 | [
[
"Andersson",
"Lars",
""
],
[
"Bäckdahl",
"Thomas",
""
],
[
"Blue",
"Pieter",
""
]
] | Using systematic calculations in spinor language, we obtain simple descriptions of the second order symmetry operators for the conformal wave equation, the Dirac-Weyl equation and the Maxwell equation on a curved four dimensional Lorentzian manifold. The conditions for existence of symmetry operators for the different ... |
2209.14834 | Reginald Christian Bernardo | Reginald Christian Bernardo and Kin-Wang Ng | Pulsar and cosmic variances of pulsar timing-array correlation
measurements of the stochastic gravitational wave background | 25 pages, 6 figures, minor changes, to appear in JCAP, code in
https://github.com/reggiebernardo/PTAfast | JCAP 11 (2022) 046 | 10.1088/1475-7516/2022/11/046 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pulsar timing-array correlation measurements offer an exciting opportunity to
test the nature of gravity in the cosmologically novel nanohertz gravitational
wave regime. The stochastic gravitational wave background is assumed Gaussian
and random, while there are limited pulsar pairs in the sky. This brings
theoretica... | [
{
"created": "Thu, 29 Sep 2022 14:50:29 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2022 06:35:37 GMT",
"version": "v2"
}
] | 2022-11-23 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Ng",
"Kin-Wang",
""
]
] | Pulsar timing-array correlation measurements offer an exciting opportunity to test the nature of gravity in the cosmologically novel nanohertz gravitational wave regime. The stochastic gravitational wave background is assumed Gaussian and random, while there are limited pulsar pairs in the sky. This brings theoretical ... |
gr-qc/9310014 | null | J.E.Nelson | The Constraints of 2+1 Quantum Gravity | 14 pages, plain TEX, no figures, DFTT 53/93 | null | null | null | gr-qc hep-th | null | To appear in proceedings of II Workshop on ``Constraints Theory and
Quantisation Methods''Montepulciano (Siena) 1993}
General discussion of the constraints of 2+1 gravity, with emphasis on two
approaches, namely the second order and first order formalisms, and comparison
with the four dimensional theory wherever po... | [
{
"created": "Thu, 7 Oct 1993 17:30:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nelson",
"J. E.",
""
]
] | To appear in proceedings of II Workshop on ``Constraints Theory and Quantisation Methods''Montepulciano (Siena) 1993} General discussion of the constraints of 2+1 gravity, with emphasis on two approaches, namely the second order and first order formalisms, and comparison with the four dimensional theory wherever possib... |
2407.00720 | Hamed Barzegar | Hamed Barzegar and Thomas Buchert | On restrictions of current warp drive spacetimes and immediate
possibilities of improvement | 12 pages, 2 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Looking at current proposals of so-called `warp drive spacetimes', they
appear to employ General Relativity only at an elementary level. A number of
strong restrictions are imposed such as flow-orthogonality of the spacetime
foliation, vanishing spatial Ricci tensor, dimensionally reduced and
coordinate-dependent vel... | [
{
"created": "Sun, 30 Jun 2024 15:01:23 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Barzegar",
"Hamed",
""
],
[
"Buchert",
"Thomas",
""
]
] | Looking at current proposals of so-called `warp drive spacetimes', they appear to employ General Relativity only at an elementary level. A number of strong restrictions are imposed such as flow-orthogonality of the spacetime foliation, vanishing spatial Ricci tensor, dimensionally reduced and coordinate-dependent veloc... |
1308.5772 | Kourosh Nozari | Kourosh Nozari and Narges Rashidi | Cosmological dynamics of a non-minimally coupled bulk scalar field in
DGP setup | 25 pages, Accepted for publication in Astrophyics and Space Science | Astrophys. Space Sci. 349 (2014) 549-559 | 10.1007/s10509-013-1513-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological dynamics of a canonical bulk scalar field, which is
coupled non-minimally to 5-dimensional Ricci scalar in a DGP setup. We show
that presence of this non-minimally coupled bulk scalar field affects the jump
conditions of the original DGP model significantly. Within a superpotential
approach, ... | [
{
"created": "Tue, 27 Aug 2013 07:13:40 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Nozari",
"Kourosh",
""
],
[
"Rashidi",
"Narges",
""
]
] | We consider cosmological dynamics of a canonical bulk scalar field, which is coupled non-minimally to 5-dimensional Ricci scalar in a DGP setup. We show that presence of this non-minimally coupled bulk scalar field affects the jump conditions of the original DGP model significantly. Within a superpotential approach, we... |
2011.09842 | Sudip Mishra | Soumya Chakraborty, Sudip Mishra, Subenoy Chakraborty | A Dynamical System Analysis of cosmic evolution with coupled phantom
dark energy with dark matter | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work is an example of the application of the dynamical system
analysis in the context of cosmology. Here cosmic evolution is considered in
the background of homogeneous and isotropic flat
Friedmann-Lema\^{i}tre-Robertson-Walker space-time with interacting dark energy
and varying mass dark matter as the ma... | [
{
"created": "Wed, 18 Nov 2020 12:08:52 GMT",
"version": "v1"
}
] | 2020-11-20 | [
[
"Chakraborty",
"Soumya",
""
],
[
"Mishra",
"Sudip",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present work is an example of the application of the dynamical system analysis in the context of cosmology. Here cosmic evolution is considered in the background of homogeneous and isotropic flat Friedmann-Lema\^{i}tre-Robertson-Walker space-time with interacting dark energy and varying mass dark matter as the matt... |
1605.01943 | Ahmed Bouda | T. Foughali and A. Bouda | From Fock's Transformation to de Sitter Space | 8 pages, no figures | Can. J. Phys. 93 (2015) 734 | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | As in Deformed Special Relativity, we showed recently that the Fock
coordinate transformation can be derived from a new deformed Poisson brackets.
This approach allowed us to establish the corresponding momentum transformation
which keeps invariant the four dimensional contraction $p_{\mu} x^{\mu} $. From
the resulti... | [
{
"created": "Fri, 6 May 2016 14:09:41 GMT",
"version": "v1"
}
] | 2016-05-09 | [
[
"Foughali",
"T.",
""
],
[
"Bouda",
"A.",
""
]
] | As in Deformed Special Relativity, we showed recently that the Fock coordinate transformation can be derived from a new deformed Poisson brackets. This approach allowed us to establish the corresponding momentum transformation which keeps invariant the four dimensional contraction $p_{\mu} x^{\mu} $. From the resulting... |
1305.5014 | XiaoXiong Zeng | Yi-Wen Han, Gang Chen, Ming-Jian Lan | Legendre transformations and the thermodynamic geometry of 5D black
holes | 6 pages. arXiv admin note: substantial text overlap with
arXiv:1207.5626; and text overlap with arXiv:0905.1776, arXiv:0811.2524,
arXiv:1104.3723 by other authors | Chinese Physics C 37 (2013) 035101 | 10.1088/1674-1137/37/3/035101 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | This paper studies the thermodynamic properties of the 5D black hole in
Einstein-Gauss-Bonnet gravity from the viewpoint of geometrothermodynamics. It
{is found} that the Legendre invariant metrics of the 5D black {holes} in
Einstein-Yang-Mills-Gauss-Bonnet {theory and} Einstein-Maxwell-Gauss-Bonnet
{theory} reproduc... | [
{
"created": "Wed, 22 May 2013 03:53:38 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Han",
"Yi-Wen",
""
],
[
"Chen",
"Gang",
""
],
[
"Lan",
"Ming-Jian",
""
]
] | This paper studies the thermodynamic properties of the 5D black hole in Einstein-Gauss-Bonnet gravity from the viewpoint of geometrothermodynamics. It {is found} that the Legendre invariant metrics of the 5D black {holes} in Einstein-Yang-Mills-Gauss-Bonnet {theory and} Einstein-Maxwell-Gauss-Bonnet {theory} reproduce ... |
2008.11033 | Abdul Jawad | Abdul Jawad | Consequences of Thermal Fluctuations of Well-Known Black Holes in
Modified Gravity | 29 pages, 26 figures, Accepted in CQG for publication | null | 10.1088/1361-6382/ab9ad5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum fluctuation consequences have significant role in high-energy
physics. These fluctuation often regarded as a correction of the infrared (IR)
limit. Such correction contribute to the high-energy limit of thermodynamical
quantities and the stability conditions of black holes. In this work, we
analyze the therma... | [
{
"created": "Sat, 22 Aug 2020 19:20:27 GMT",
"version": "v1"
}
] | 2020-08-26 | [
[
"Jawad",
"Abdul",
""
]
] | Quantum fluctuation consequences have significant role in high-energy physics. These fluctuation often regarded as a correction of the infrared (IR) limit. Such correction contribute to the high-energy limit of thermodynamical quantities and the stability conditions of black holes. In this work, we analyze the thermal ... |
1611.08909 | Ahmad Borzou | Ahmad Borzou and Behrouz Mirza | A Homogeneous and Isotropic Universe in Lorentz Gauge Theory of Gravity | 14 pages, 4 figures, accepted for publication in CQG | Class. Quantum Grav. 34 (2017) 145005 | 10.1088/1361-6382/aa7647 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lorentz gauge theory of gravity was recently introduced. We study the
homogeneous and isotropic universe of this theory. It is shown that some time
after the matter in the universe is diluted enough, at $z \sim 0.6$, the
decelerating expansion shifts spontaneously to an accelerating one without a
dark energy. We disc... | [
{
"created": "Sun, 27 Nov 2016 20:46:08 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2017 23:52:23 GMT",
"version": "v2"
}
] | 2017-07-04 | [
[
"Borzou",
"Ahmad",
""
],
[
"Mirza",
"Behrouz",
""
]
] | Lorentz gauge theory of gravity was recently introduced. We study the homogeneous and isotropic universe of this theory. It is shown that some time after the matter in the universe is diluted enough, at $z \sim 0.6$, the decelerating expansion shifts spontaneously to an accelerating one without a dark energy. We discus... |
gr-qc/9812076 | Claude Barrabes | C. Barrab\`es, V. Frolov and R. Parentani | Metric Fluctuation Corrections to Hawking Radiation | 27 pages, 2 figures, LaTeX. Revised version | Phys.Rev. D59 (1999) 124010 | 10.1103/PhysRevD.59.124010 | null | gr-qc hep-th | null | We study how fluctuations of the black hole geometry affect the properties of
Hawking radiation. Even though we treat the fluctuations classically, we
believe that the results so obtained indicate what might be the effects induced
by quantum fluctuations in a self consistent treatment. To characterize the
fluctuation... | [
{
"created": "Mon, 21 Dec 1998 16:44:19 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Mar 1999 12:53:02 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Barrabès",
"C.",
""
],
[
"Frolov",
"V.",
""
],
[
"Parentani",
"R.",
""
]
] | We study how fluctuations of the black hole geometry affect the properties of Hawking radiation. Even though we treat the fluctuations classically, we believe that the results so obtained indicate what might be the effects induced by quantum fluctuations in a self consistent treatment. To characterize the fluctuations,... |
1912.03882 | Emmanuil Saridakis | Emmanuel N. Saridakis, Shynaray Myrzakul, Kairat Myrzakulov, Koblandy
Yerzhanov | Cosmological applications of Myrzakulov gravity | 10 pages, 4 figures, version published in Phys.Rev.D | Phys. Rev. D 102, 023525 (2020) | 10.1103/PhysRevD.102.023525 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological applications of Myrzakulov $F(R,T)$ gravity.
In this theory ones uses a specific but non-special connection, and thus both
curvature and torsion are dynamical fields related to gravity. We introduce a
parametrization that quantifies the deviation of curvature and torsion scalars
form t... | [
{
"created": "Mon, 9 Dec 2019 07:33:38 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Nov 2020 08:49:36 GMT",
"version": "v2"
}
] | 2020-11-10 | [
[
"Saridakis",
"Emmanuel N.",
""
],
[
"Myrzakul",
"Shynaray",
""
],
[
"Myrzakulov",
"Kairat",
""
],
[
"Yerzhanov",
"Koblandy",
""
]
] | We investigate the cosmological applications of Myrzakulov $F(R,T)$ gravity. In this theory ones uses a specific but non-special connection, and thus both curvature and torsion are dynamical fields related to gravity. We introduce a parametrization that quantifies the deviation of curvature and torsion scalars form the... |
1903.08399 | Tsutomu Kobayashi | Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi | On the screening mechanism in DHOST theories evading gravitational wave
constraints | 6 pages, 2 figures | Phys. Rev. D 99, 104073 (2019) | 10.1103/PhysRevD.99.104073 | RUP-19-8 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a subclass of degenerate higher-order scalar-tensor (DHOST)
theories in which gravitational waves propagate at the speed of light and do
not decay into scalar fluctuations. The screening mechanism in DHOST theories
evading these two gravitational wave constraints operates very differently from
that in gen... | [
{
"created": "Wed, 20 Mar 2019 09:21:14 GMT",
"version": "v1"
}
] | 2019-06-05 | [
[
"Hirano",
"Shin'ichi",
""
],
[
"Kobayashi",
"Tsutomu",
""
],
[
"Yamauchi",
"Daisuke",
""
]
] | We consider a subclass of degenerate higher-order scalar-tensor (DHOST) theories in which gravitational waves propagate at the speed of light and do not decay into scalar fluctuations. The screening mechanism in DHOST theories evading these two gravitational wave constraints operates very differently from that in gener... |
1904.02744 | Neil J. Cornish | Logan O'Beirne, Neil J. Cornish, Sarah J. Vigeland, Stephen R. Taylor | Constraining alternative polarization states of gravitational waves from
individual black hole binaries using pulsar timing arrays | 12 pages, 8 figures | Phys. Rev. D 99, 124039 (2019) | 10.1103/PhysRevD.99.124039 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pulsar timing arrays are sensitive to gravitational wave perturbations
produced by individual supermassive black hole binaries during their early
inspiral phase. Modified gravity theories allow for the emission of
gravitational dipole radiation, which is enhanced relative to the quadrupole
contribution for low orbita... | [
{
"created": "Thu, 4 Apr 2019 18:45:03 GMT",
"version": "v1"
}
] | 2019-07-03 | [
[
"O'Beirne",
"Logan",
""
],
[
"Cornish",
"Neil J.",
""
],
[
"Vigeland",
"Sarah J.",
""
],
[
"Taylor",
"Stephen R.",
""
]
] | Pulsar timing arrays are sensitive to gravitational wave perturbations produced by individual supermassive black hole binaries during their early inspiral phase. Modified gravity theories allow for the emission of gravitational dipole radiation, which is enhanced relative to the quadrupole contribution for low orbital ... |
2111.04557 | Pisin Chen | Pisin Chen | Gravitational Synchrotron Radiation from Storage Rings | 5 pages, 2 figures | null | null | null | gr-qc hep-ex physics.acc-ph | http://creativecommons.org/publicdomain/zero/1.0/ | We reinvestigate the gravitational waves (GWs) induced by charged particles
in storage rings. There are two major components in such GWs. One is the
gravitational synchrotron radiation (GSR), i.e., the direct emission by the
bending of the trajectory of a relativistic charged particle, much like the
conventional elec... | [
{
"created": "Mon, 8 Nov 2021 15:13:10 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2021 09:44:53 GMT",
"version": "v2"
}
] | 2021-11-25 | [
[
"Chen",
"Pisin",
""
]
] | We reinvestigate the gravitational waves (GWs) induced by charged particles in storage rings. There are two major components in such GWs. One is the gravitational synchrotron radiation (GSR), i.e., the direct emission by the bending of the trajectory of a relativistic charged particle, much like the conventional electr... |
1306.4392 | Franco Fiorini | Franco Fiorini | Nonsingular Promises from Born-Infeld Gravity | 5 pages, no figures. Accepted for publication in Physical Review
Letters | Phys. Rev. Lett. 111 (2013) 041104 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Born-Infeld determinantal gravity formulated in Weitzenbock spacetime is
discussed in the context of Friedmann-Robertson-Walker (FRW) cosmologies. It is
shown how the standard model big bang singularity is absent in certain
spatially flat FRW spacetimes, where the high energy regime is characterized by
a de Sitter in... | [
{
"created": "Tue, 18 Jun 2013 23:27:51 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jul 2013 22:12:06 GMT",
"version": "v2"
}
] | 2013-07-24 | [
[
"Fiorini",
"Franco",
""
]
] | Born-Infeld determinantal gravity formulated in Weitzenbock spacetime is discussed in the context of Friedmann-Robertson-Walker (FRW) cosmologies. It is shown how the standard model big bang singularity is absent in certain spatially flat FRW spacetimes, where the high energy regime is characterized by a de Sitter infl... |
gr-qc/0401069 | Tiberiu Harko | T. Harko, M. K. Mak | Anisotropy in Bianchi-type brane cosmologies | 12 pages, no figures, to appear in Class. Quantum Grav | Class.Quant.Grav. 21 (2004) 1489-1504 | 10.1088/0264-9381/21/6/015 | null | gr-qc hep-th | null | The behavior near the initial singular state of the anisotropy parameter of
the arbitrary type, homogeneous and anisotropic Bianchi models is considered in
the framework of the brane world cosmological models. The matter content on the
brane is assumed to be an isotropic perfect cosmological fluid, obeying a
barotrop... | [
{
"created": "Fri, 16 Jan 2004 05:08:30 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Harko",
"T.",
""
],
[
"Mak",
"M. K.",
""
]
] | The behavior near the initial singular state of the anisotropy parameter of the arbitrary type, homogeneous and anisotropic Bianchi models is considered in the framework of the brane world cosmological models. The matter content on the brane is assumed to be an isotropic perfect cosmological fluid, obeying a barotropic... |
1701.05669 | Zhongheng Li | Shanshan Li, Dan-Dan Li, Li-Qin Mi, Zhong-Heng Li | Parametric Solution of a Small-Large Black Hole Coexistence Curve | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the first-order phase transition of a charged anti-de Sitter
black hole, and find that the equation of state with the conditions of the two
coexisting phases, leads to the two coupled equations about the thermodynamic
volumes of small black hole and large black hole. By solving the equations, it
is found ... | [
{
"created": "Fri, 20 Jan 2017 03:34:21 GMT",
"version": "v1"
}
] | 2017-01-23 | [
[
"Li",
"Shanshan",
""
],
[
"Li",
"Dan-Dan",
""
],
[
"Mi",
"Li-Qin",
""
],
[
"Li",
"Zhong-Heng",
""
]
] | We consider the first-order phase transition of a charged anti-de Sitter black hole, and find that the equation of state with the conditions of the two coexisting phases, leads to the two coupled equations about the thermodynamic volumes of small black hole and large black hole. By solving the equations, it is found th... |
1205.3403 | Alessandro Nagar | Sebastiano Bernuzzi, Alessandro Nagar, Marcus Thierfelder and Bernd
Bruegmann | Tidal effects in binary neutron star coalescence | 12 pages, 8 figures, submitted to Phys. Rev. D | Phys. Rev. D 86, 044030 (2012) | 10.1103/PhysRevD.86.044030 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare dynamics and waveforms from binary neutron star coalescence as
computed by new long-term ($\sim 10 $ orbits) numerical relativity simulations
and by the tidal effective-one-body (EOB) model including analytical tidal
corrections up to second post-Newtonian order (2PN). The current analytical
knowledge enco... | [
{
"created": "Tue, 15 May 2012 15:02:18 GMT",
"version": "v1"
}
] | 2013-04-25 | [
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Thierfelder",
"Marcus",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We compare dynamics and waveforms from binary neutron star coalescence as computed by new long-term ($\sim 10 $ orbits) numerical relativity simulations and by the tidal effective-one-body (EOB) model including analytical tidal corrections up to second post-Newtonian order (2PN). The current analytical knowledge encode... |
2303.03835 | Mokdad Mokdad | Mokdad Mokdad and Milos Provci | Scattering of Dirac Fields in the Interior of Kerr-Newman(-Anti)-de
Sitter Black Holes | 38 pages | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct a scattering theory for the massive and charged
Dirac fields in the interiors of sub-extremal Kerr-Newman-(anti)-de Sitter
black holes. More precisely, we show existence, uniqueness and asymptotic
completeness of scattering data for such Dirac fields from the event horizon of
the black hole... | [
{
"created": "Tue, 7 Mar 2023 12:03:48 GMT",
"version": "v1"
}
] | 2023-03-08 | [
[
"Mokdad",
"Mokdad",
""
],
[
"Provci",
"Milos",
""
]
] | In this paper we construct a scattering theory for the massive and charged Dirac fields in the interiors of sub-extremal Kerr-Newman-(anti)-de Sitter black holes. More precisely, we show existence, uniqueness and asymptotic completeness of scattering data for such Dirac fields from the event horizon of the black hole t... |
1506.08457 | Alessandro Nagar | Alessandro Nagar, Thibault Damour, Christian Reisswig, and Denis
Pollney | Energetics and phasing of nonprecessing spinning coalescing black hole
binaries | 26 pages, 27 figures, results improved with respect to first version | Phys. Rev. D 93, 044046 (2016) | 10.1103/PhysRevD.93.044046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an improved numerical relativity (NR) calibration of the new
effective-one-body (EOB) model for coalescing non precessing spinning black
hole binaries recently introduced by Damour and Nagar [Physical Review D 90,
044018 (2014)]. We do so by comparing the EOB predictions to both the phasing
and the energet... | [
{
"created": "Sun, 28 Jun 2015 21:49:15 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Nov 2015 14:52:06 GMT",
"version": "v2"
}
] | 2016-02-24 | [
[
"Nagar",
"Alessandro",
""
],
[
"Damour",
"Thibault",
""
],
[
"Reisswig",
"Christian",
""
],
[
"Pollney",
"Denis",
""
]
] | We present an improved numerical relativity (NR) calibration of the new effective-one-body (EOB) model for coalescing non precessing spinning black hole binaries recently introduced by Damour and Nagar [Physical Review D 90, 044018 (2014)]. We do so by comparing the EOB predictions to both the phasing and the energetic... |
1806.07672 | Gen Ye | Gen Ye and Yun-Song Piao | Quantum decoherence of primordial perturbations through nonlinear
scaler-tensor interaction | 23 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scaler and tensor perturbations couple nonlinearly with each other in the
Einstein-Hilbert action. We show that such interaction naturally leads to the
quantum decoherence of the primordial perturbations during inflation at horizon
crossing. The dominant interaction Hamiltonian contributing to decoherence is
identifi... | [
{
"created": "Wed, 20 Jun 2018 11:39:45 GMT",
"version": "v1"
}
] | 2018-06-21 | [
[
"Ye",
"Gen",
""
],
[
"Piao",
"Yun-Song",
""
]
] | Scaler and tensor perturbations couple nonlinearly with each other in the Einstein-Hilbert action. We show that such interaction naturally leads to the quantum decoherence of the primordial perturbations during inflation at horizon crossing. The dominant interaction Hamiltonian contributing to decoherence is identified... |
1504.00333 | Andre Fuzfa | A. F\"uzfa | How current loops and solenoids curve space-time | 12 pages, 8 figures, accepted for publication in PRD | Phys. Rev. D 93, 024014 (2016) | 10.1103/PhysRevD.93.024014 | null | gr-qc cond-mat.supr-con hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The curved space-time around current loops and solenoids carrying arbitrarily
large steady electric currents is obtained from the numerical resolution of the
coupled Einstein-Maxwell equations in cylindrical symmetry. The artificial
gravitational field associated to the generation of a magnetic field produces
gravita... | [
{
"created": "Wed, 1 Apr 2015 18:39:23 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Nov 2015 09:23:21 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Dec 2015 11:23:35 GMT",
"version": "v3"
}
] | 2016-01-19 | [
[
"Füzfa",
"A.",
""
]
] | The curved space-time around current loops and solenoids carrying arbitrarily large steady electric currents is obtained from the numerical resolution of the coupled Einstein-Maxwell equations in cylindrical symmetry. The artificial gravitational field associated to the generation of a magnetic field produces gravitati... |
1702.00189 | Ghadir Jafari | Ghadir Jafari, M. R. Setare, Hamid R. Bakhtiarizadeh | Static spherically symmetric black holes in de Rham-Gabadadze-Tolley
massive gravity in arbitrary dimensions | Version accepted for publication in PLB | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is devoted to static spherically symmetric black hole solutions
of dRGT (de Rham-Gabadadze-Tolley) massive gravity in the presence of
cosmological constant. The unitary and non-unitary gauges are used to find the
solutions in three, four and five dimensions. We show that there are two
general classes of ... | [
{
"created": "Wed, 1 Feb 2017 10:18:23 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2017 17:01:11 GMT",
"version": "v2"
}
] | 2017-09-04 | [
[
"Jafari",
"Ghadir",
""
],
[
"Setare",
"M. R.",
""
],
[
"Bakhtiarizadeh",
"Hamid R.",
""
]
] | This article is devoted to static spherically symmetric black hole solutions of dRGT (de Rham-Gabadadze-Tolley) massive gravity in the presence of cosmological constant. The unitary and non-unitary gauges are used to find the solutions in three, four and five dimensions. We show that there are two general classes of so... |
gr-qc/0211102 | Ujjal Debnath | Ujjal Debnath and Subenoy Chakraborty | Gravitational Collapse in Higher Dimension | 8 Latex pages, No figure, Revtex style | Gen.Rel.Grav. 36 (2004) 1243-1253 | 10.1023/B:GERG.0000022385.32666.4d | null | gr-qc | null | Spherically symmetric inhomogeneous dust collapse has been studied in higher
dimensional space-time and appearance of naked singularity has been analyzed
both for non-marginal and marginally bound cases. It has been shown that naked
singularity is possible for any arbitrary dimension in non-marginally bound
case. For... | [
{
"created": "Fri, 29 Nov 2002 04:10:43 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Mar 2003 10:35:51 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Debnath",
"Ujjal",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Spherically symmetric inhomogeneous dust collapse has been studied in higher dimensional space-time and appearance of naked singularity has been analyzed both for non-marginal and marginally bound cases. It has been shown that naked singularity is possible for any arbitrary dimension in non-marginally bound case. For m... |
1105.6156 | Chen Songbai | Weiping Yao, Songbai Chen, Changqing Liu, Jiliang Jing | Effects of acceleration on the collision of particles in the rotating
black hole spacetime | 7 pages, 2 figures, The corrected version accepted for publication in
EPJC | Eur. Phys. J. C (2012) 72:1898 | 10.1140/epjc/s10052-012-1898-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the collision of two geodesic particles in the accelerating and
rotating black hole spacetime and probe the effects of the acceleration of
black hole on the center-of-mass energy of the colliding particles and on the
high-velocity collision belts. We find that the dependence of the
center-of-mass energy on t... | [
{
"created": "Tue, 31 May 2011 03:37:46 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2012 04:45:32 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Yao",
"Weiping",
""
],
[
"Chen",
"Songbai",
""
],
[
"Liu",
"Changqing",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study the collision of two geodesic particles in the accelerating and rotating black hole spacetime and probe the effects of the acceleration of black hole on the center-of-mass energy of the colliding particles and on the high-velocity collision belts. We find that the dependence of the center-of-mass energy on the... |
2401.16949 | Florian Steininger | Hamed Barzegar, Piotr T. Chru\'sciel, Florian Steininger | On elastic deformations of cylindrical bodies under the influence of the
gravitational field | 31 pages, 21 figures | null | null | UWThPh-2024-3 | gr-qc physics.class-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the deformations of a cylindrical elastic body resulting from
displacements in a varying gravitational field.
| [
{
"created": "Tue, 30 Jan 2024 12:21:12 GMT",
"version": "v1"
}
] | 2024-01-31 | [
[
"Barzegar",
"Hamed",
""
],
[
"Chruściel",
"Piotr T.",
""
],
[
"Steininger",
"Florian",
""
]
] | We analyse the deformations of a cylindrical elastic body resulting from displacements in a varying gravitational field. |
2301.13751 | Bayram Tekin | Aydin Tavlayan and Bayram Tekin | Instability of a Kerr-type naked singularity due to light and matter
accretion and its shadow | 26 pages, discussions extended, matches the published version | Class. Quantum Grav. 41 065004 (2024) | 10.1088/1361-6382/ad2318 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study null and timelike constant radii geodesics in the environment of an
over-spinning putative Kerr-type naked singularity. We are particularly
interested in two topics: first, the differences of the shadows of the naked
rotating singularity and the Kerr black hole; and second, the spinning down
effect of the pa... | [
{
"created": "Tue, 31 Jan 2023 16:38:42 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2023 12:33:20 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Sep 2023 05:52:43 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Feb 2024 13:19:26 GMT",
"version": "v4"
}
] | 2024-02-20 | [
[
"Tavlayan",
"Aydin",
""
],
[
"Tekin",
"Bayram",
""
]
] | We study null and timelike constant radii geodesics in the environment of an over-spinning putative Kerr-type naked singularity. We are particularly interested in two topics: first, the differences of the shadows of the naked rotating singularity and the Kerr black hole; and second, the spinning down effect of the part... |
2309.16497 | Yongqiang Wang | Long-Xing Huang, Shi-Xian Sun, Rong Zhang, Chen Liang, and Yong-Qiang
Wang | Excited Dirac stars with higher azimuthal harmonic index | 22 pages, 8 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the properties of the first excited state Dirac
stars (DSs) with higher azimuthal harmonic index (specifically, the azimuthal
harmonic indexes $m_D$ = $3/2$, $5/2$, $7/2$), as well as the relationship
between the ADM mass and angular momentum of Dirac stars with respect to
frequency. Mor... | [
{
"created": "Thu, 28 Sep 2023 15:05:29 GMT",
"version": "v1"
}
] | 2023-09-29 | [
[
"Huang",
"Long-Xing",
""
],
[
"Sun",
"Shi-Xian",
""
],
[
"Zhang",
"Rong",
""
],
[
"Liang",
"Chen",
""
],
[
"Wang",
"Yong-Qiang",
""
]
] | In this paper, we investigate the properties of the first excited state Dirac stars (DSs) with higher azimuthal harmonic index (specifically, the azimuthal harmonic indexes $m_D$ = $3/2$, $5/2$, $7/2$), as well as the relationship between the ADM mass and angular momentum of Dirac stars with respect to frequency. Moreo... |
0907.0891 | Nathan Johnson-McDaniel | Nathan K. Johnson-McDaniel, Nicolas Yunes, Wolfgang Tichy, Benjamin J.
Owen | Conformally curved binary black hole initial data including tidal
deformations and outgoing radiation | 48 pages, 23 figures | Phys.Rev.D80:124039,2009 | 10.1103/PhysRevD.80.124039 | IGC-09/7-1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | (Abridged) By asymptotically matching a post-Newtonian (PN) metric to two
tidally perturbed Schwarzschild metrics, we generate approximate initial data
(in the form of a 4-metric) for a nonspinning black hole binary in a circular
orbit. We carry out this matching through O(v^4) in the binary's orbital
velocity v, so ... | [
{
"created": "Mon, 6 Jul 2009 19:06:54 GMT",
"version": "v1"
}
] | 2010-01-07 | [
[
"Johnson-McDaniel",
"Nathan K.",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Tichy",
"Wolfgang",
""
],
[
"Owen",
"Benjamin J.",
""
]
] | (Abridged) By asymptotically matching a post-Newtonian (PN) metric to two tidally perturbed Schwarzschild metrics, we generate approximate initial data (in the form of a 4-metric) for a nonspinning black hole binary in a circular orbit. We carry out this matching through O(v^4) in the binary's orbital velocity v, so th... |
gr-qc/0409083 | Kip S. Thorne | Mihai Bondarescu and Kip S. Thorne (California Institute of
Technology) | A New Family of Light Beams and Mirror Shapes for Future LIGO
Interferometers | Submitted to Physical Review D on 21 September 2004; RevTeX, 6 pages,
4 Figures | Phys.Rev. D74 (2006) 082003 | 10.1103/PhysRevD.74.082003 | null | gr-qc | null | Advanced LIGO's present baseline design uses arm cavities with Gaussian light
beams supported by spherical mirrors. Because Gaussian beams have large
intensity gradients in regions of high intensity, they average poorly over
fluctuating bumps and valleys on the mirror surfaces, caused by random thermal
fluctuations (... | [
{
"created": "Wed, 22 Sep 2004 17:34:37 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bondarescu",
"Mihai",
"",
"California Institute of\n Technology"
],
[
"Thorne",
"Kip S.",
"",
"California Institute of\n Technology"
]
] | Advanced LIGO's present baseline design uses arm cavities with Gaussian light beams supported by spherical mirrors. Because Gaussian beams have large intensity gradients in regions of high intensity, they average poorly over fluctuating bumps and valleys on the mirror surfaces, caused by random thermal fluctuations (th... |
1405.6663 | Salvatore Capozziello | Artyom V. Astashenok, Salvatore Capozziello, Sergei D. Odintsov | Magnetic Neutron Stars in f(R) gravity | 12 pages, 4 figures, 6 tables | null | 10.1007/s10509-014-2182-6 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Neutron stars with strong magnetic fields are considered in the framework of
f(R) gravity. In order to describe dense matter in magnetic field, the model
with baryon octet interacting through $\sigma$$\rho$$\omega$-fields is used.
The hyperonization process results in softening the equation of state (EoS) and
in decr... | [
{
"created": "Mon, 26 May 2014 18:05:03 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | Neutron stars with strong magnetic fields are considered in the framework of f(R) gravity. In order to describe dense matter in magnetic field, the model with baryon octet interacting through $\sigma$$\rho$$\omega$-fields is used. The hyperonization process results in softening the equation of state (EoS) and in decrea... |
2209.04433 | Kimet Jusufi | Kimet Jusufi | Regular black holes in three dimensions and the zero point length | 4 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, by means of regularisation procedure via $r\to
\sqrt{r^2+l_0^2}$ (where $l_0$ can play the role of zero point length), we
first modify the gravitational and electromagnetic potentials in two dimensions
and then we solve the Einstein field equations to end up with an exact and
regular black hole solutio... | [
{
"created": "Thu, 8 Sep 2022 08:41:46 GMT",
"version": "v1"
}
] | 2022-09-12 | [
[
"Jusufi",
"Kimet",
""
]
] | In this paper, by means of regularisation procedure via $r\to \sqrt{r^2+l_0^2}$ (where $l_0$ can play the role of zero point length), we first modify the gravitational and electromagnetic potentials in two dimensions and then we solve the Einstein field equations to end up with an exact and regular black hole solution ... |
gr-qc/9512021 | Gerard Clement | G\'erard Cl\'ement | Gravitating Chern-Simons vortices | 11 pages, LaTex | Phys.Rev. D54 (1996) 1844-1847 | 10.1103/PhysRevD.54.1844 | GCR-95/12/01 | gr-qc hep-th | null | The construction of self-dual vortex solutions to the Chern-Simons-Higgs
model (with a suitable eighth-order potential) coupled to Einstein gravity in
(2 + 1) dimensions is reconsidered. We show that the self-duality condition may
be derived from the sole assumption $g_{00} = 1$. Next, we derive a family of
exact, do... | [
{
"created": "Mon, 11 Dec 1995 09:58:57 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Clément",
"Gérard",
""
]
] | The construction of self-dual vortex solutions to the Chern-Simons-Higgs model (with a suitable eighth-order potential) coupled to Einstein gravity in (2 + 1) dimensions is reconsidered. We show that the self-duality condition may be derived from the sole assumption $g_{00} = 1$. Next, we derive a family of exact, doub... |
1507.04076 | Peter Zimmerman | Peter Zimmerman | Gravitational self-force in scalar-tensor gravity | 26 pages. minor typographical errors corrected in v2 | Phys. Rev. D 92, 064051 (2015) | 10.1103/PhysRevD.92.064051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the discovery of floating orbits and the potential to provide
extra constraints on alternative theories, in this paper we derive the
self-force equation for a small compact object moving on an accelerated world
line in a background spacetime which is a solution of the coupled gravitational
and scalar fie... | [
{
"created": "Wed, 15 Jul 2015 03:25:01 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Nov 2015 06:52:24 GMT",
"version": "v2"
}
] | 2015-11-10 | [
[
"Zimmerman",
"Peter",
""
]
] | Motivated by the discovery of floating orbits and the potential to provide extra constraints on alternative theories, in this paper we derive the self-force equation for a small compact object moving on an accelerated world line in a background spacetime which is a solution of the coupled gravitational and scalar field... |
1708.09019 | Maria Cecilia Tomasini | Emilio Rub\'in de Celis, Cecilia Tomasini, Claudio Simeone | Perturbative dynamics of thin-shell wormholes beyond general relativity:
an alternative approach | To appear in IJMPD 1750171 | null | 10.1142/S0218271817501711 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent studies relating the approximations for the equations of state for
thin shells and their consequent perturbative evolution are extended to
thin-shell wormholes in theories beyond general relativity and more than four
spacetime dimensions. The assumption of equations of state of the same form for
static and slo... | [
{
"created": "Tue, 29 Aug 2017 20:38:48 GMT",
"version": "v1"
}
] | 2018-01-10 | [
[
"de Celis",
"Emilio Rubín",
""
],
[
"Tomasini",
"Cecilia",
""
],
[
"Simeone",
"Claudio",
""
]
] | Recent studies relating the approximations for the equations of state for thin shells and their consequent perturbative evolution are extended to thin-shell wormholes in theories beyond general relativity and more than four spacetime dimensions. The assumption of equations of state of the same form for static and slowl... |
0805.3794 | Burin Gumjudpai | Theerakarn Phetnora (TPTP Naresuan U.), Roongtum Sooksan (TPTP
Naresuan U.) and Burin Gumjudpai (TPTP Naresuan U. and DAMTP U. Cambridge) | Phantom expansion with non-linear Schr\"{o}dinger-type formulation of
scalar field cosmology | [11 pages, 8 figures] Some parts of this work was presented as an
oral presentation by Theerakarn Phetnora at the SIAM Physics Congress 2008,
Kao Yai, Thailand (20-22 March 2008), accepted by Gen. Rel. Grav | Gen.Rel.Grav.42:225-240,2010 | 10.1007/s10714-009-0831-9 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe non-flat standard Friedmann cosmology of canonical scalar field
with barotropic fluid in form of non-linear
Schr\"{o}dinger-type (NLS) formulation in which all cosmological dynamical
quantities are expressed in term of Schr\"{o}dinger quantities as similar to
those in time-independent quantum mechanics.... | [
{
"created": "Sat, 24 May 2008 21:07:38 GMT",
"version": "v1"
},
{
"created": "Mon, 18 May 2009 16:20:46 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Phetnora",
"Theerakarn",
"",
"TPTP Naresuan U."
],
[
"Sooksan",
"Roongtum",
"",
"TPTP\n Naresuan U."
],
[
"Gumjudpai",
"Burin",
"",
"TPTP Naresuan U. and DAMTP U. Cambridge"
]
] | We describe non-flat standard Friedmann cosmology of canonical scalar field with barotropic fluid in form of non-linear Schr\"{o}dinger-type (NLS) formulation in which all cosmological dynamical quantities are expressed in term of Schr\"{o}dinger quantities as similar to those in time-independent quantum mechanics. We ... |
gr-qc/0212030 | Yasunori Fujii | Yasunori Fujii | Mass of the dilaton and the cosmological constant | 9 pages LaTeX 1 figure; an added reference and partial revisions | Prog.Theor.Phys.110:433-439,2003 | 10.1143/PTP.110.433 | null | gr-qc | null | One might raise a question if the gravitational scalar field (dilaton)
mediates a finite-range force between local objects still behaving globally as
being massless to implement the scenario of a decaying cosmological constant.
We offer a non-negative reply by a detailed analysis of the field-theoretical
quantization... | [
{
"created": "Fri, 6 Dec 2002 07:36:15 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Dec 2002 03:54:50 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Feb 2003 02:35:50 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Fujii",
"Yasunori",
""
]
] | One might raise a question if the gravitational scalar field (dilaton) mediates a finite-range force between local objects still behaving globally as being massless to implement the scenario of a decaying cosmological constant. We offer a non-negative reply by a detailed analysis of the field-theoretical quantization p... |
gr-qc/0407113 | Wei-Tou Ni | Wei-Tou Ni | Probing the Microscopic Origin of Gravity via Precision Polarization and
Spin Experiments | 8 pages; 1 figure | Chin.Phys.Lett. 22 (2005) 33-35 | 10.1088/0256-307X/22/1/010 | null | gr-qc | null | As in other parts of physics, we advocate the interaction approach:
experiments <--> phenomenology <--> low-energy effective (field) theory <-->
microscopic theory to probe the microscopic origin of gravity. Using chi-g
phenomenological framework, we discuss the tests of equivalence principles. The
only experimentall... | [
{
"created": "Thu, 29 Jul 2004 12:39:21 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Ni",
"Wei-Tou",
""
]
] | As in other parts of physics, we advocate the interaction approach: experiments <--> phenomenology <--> low-energy effective (field) theory <--> microscopic theory to probe the microscopic origin of gravity. Using chi-g phenomenological framework, we discuss the tests of equivalence principles. The only experimentally ... |
0810.3911 | Fabrizio Tamburini | Clovis Jacinto de Matos (1), Fabrizio Tamburini (2), Josep Maria
Perdigues Armengol (3) and Carlo Nicola Colacino (4) ((1) ESA-HQ, European
Space Agency, 8-10 rue Mario Nikis, Paris, France (2) Dept. of Astronomy,
University of Padova, vicolo dell'Osservatorio 3, Padova, Italy (3)
ESA-ESTEC, European Space Agen... | Gravitational Waves detection and spectroscopy with a Double-slit
Quantum Eraser | 14 pages, 2 figures, accepted for publication in NCB | null | null | null | gr-qc astro-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the use of heralded photons to detect Gravitational Waves (GWs).
Heralded photons are those photons that, produced during a parametric
downconversion process, are "labelled" by the detection and counting of
coincidences of their correlated or entangled twins and therefore can be
discriminated from the back... | [
{
"created": "Tue, 21 Oct 2008 19:57:24 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 2009 07:41:49 GMT",
"version": "v2"
}
] | 2009-09-08 | [
[
"de Matos",
"Clovis Jacinto",
""
],
[
"Tamburini",
"Fabrizio",
""
],
[
"Armengol",
"Josep Maria Perdigues",
""
],
[
"Colacino",
"Carlo Nicola",
""
]
] | We propose the use of heralded photons to detect Gravitational Waves (GWs). Heralded photons are those photons that, produced during a parametric downconversion process, are "labelled" by the detection and counting of coincidences of their correlated or entangled twins and therefore can be discriminated from the backgr... |
2203.09867 | Vasilis Oikonomou | V.K. Oikonomou, P.D. Katzanis, Ilias C. Papadimitriou | Bottom-Up Reconstruction of Viable GW170817 Compatible
Einstein-Gauss-Bonnet Theories | CQG accepted, some typos corrected, one author name modified, doi
added | null | 10.1088/1361-6382/ac5eba | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we shall use a bottom-up approach for obtaining viable
inflationary Einstein-Gauss-Bonnet models which are also compatible with the
GW170817 event. Specifically, we shall use a recently developed theoretical
framework in which we shall specify only the tensor-to-scalar ratio, in terms
of the $e$-foldings... | [
{
"created": "Fri, 18 Mar 2022 11:14:25 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2022 12:09:30 GMT",
"version": "v2"
}
] | 2022-03-24 | [
[
"Oikonomou",
"V. K.",
""
],
[
"Katzanis",
"P. D.",
""
],
[
"Papadimitriou",
"Ilias C.",
""
]
] | In this work we shall use a bottom-up approach for obtaining viable inflationary Einstein-Gauss-Bonnet models which are also compatible with the GW170817 event. Specifically, we shall use a recently developed theoretical framework in which we shall specify only the tensor-to-scalar ratio, in terms of the $e$-foldings n... |
2110.14736 | Samuel Barroso Bellido | Samuel Barroso Bellido | Effects of a Quantum or Classical Scalar Field on the Entanglement
Entropy of a Pair of Universes | Accepted for publication in PRD. 3 Figures | Phys. Rev. D 104, 106009 (2021) | 10.1103/PhysRevD.104.106009 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Using the formalism of the third quantization in canonical quantum gravity,
the entropy of entanglement of a pair of universes created in the multiverse
from the vacuum has lately been calculated. Here, we examine the differences
between considering a scalar field as quantum or classical on the entanglement
entropy o... | [
{
"created": "Wed, 27 Oct 2021 19:42:01 GMT",
"version": "v1"
}
] | 2021-11-17 | [
[
"Bellido",
"Samuel Barroso",
""
]
] | Using the formalism of the third quantization in canonical quantum gravity, the entropy of entanglement of a pair of universes created in the multiverse from the vacuum has lately been calculated. Here, we examine the differences between considering a scalar field as quantum or classical on the entanglement entropy of ... |
1510.08821 | Giampiero Esposito Dr. | Giampiero Esposito | A parametrix for quantum gravity? | 27 pages | Int. J. Geom. Methods Mod. Phys. 13, 1650060 (2016) | 10.1142/S0219887816500602 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the sixties, DeWitt discovered that the advanced and retarded Green
functions of the wave operator on metric perturbations in the de Donder gauge
make it possible to define classical Poisson brackets on the space of
functionals that are invariant under the action of the full diffeomorphism
group of spacetime. He t... | [
{
"created": "Thu, 29 Oct 2015 18:58:07 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Mar 2016 16:11:08 GMT",
"version": "v2"
}
] | 2016-03-18 | [
[
"Esposito",
"Giampiero",
""
]
] | In the sixties, DeWitt discovered that the advanced and retarded Green functions of the wave operator on metric perturbations in the de Donder gauge make it possible to define classical Poisson brackets on the space of functionals that are invariant under the action of the full diffeomorphism group of spacetime. He the... |
1110.6008 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi | Quantum Tunneling in Black Holes | Ph.D. thesis (arXiv version). 139 pages, including the front matter.
Supervisor: Rabin Banerjee. Institution: S.N. Bose National Centre for Basic
Sciences, Kolkata, India. Degree awarded on 23 August 2011 from University of
Calcutta, Kolkata, India | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | This thesis is focussed towards the applications of the quantum tunneling
mechanism to study black holes. Here we give a general frame work of the
existing tunneling mechanism, both the radial null geodesic and Hamilton Jacobi
methods. On the radial null geodesic method side, we study the modifications to
the tunneli... | [
{
"created": "Thu, 27 Oct 2011 08:30:41 GMT",
"version": "v1"
}
] | 2011-10-28 | [
[
"Majhi",
"Bibhas Ranjan",
""
]
] | This thesis is focussed towards the applications of the quantum tunneling mechanism to study black holes. Here we give a general frame work of the existing tunneling mechanism, both the radial null geodesic and Hamilton Jacobi methods. On the radial null geodesic method side, we study the modifications to the tunneling... |
1210.5115 | Orlando Luongo | Salvatore Capozziello, Gerardo Cristofano, Mariafelicia De Laurentis,
Orlando Luongo | From Black Hole quantization to universal scaling laws | 3 pages, proceeding MG XIII | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Significative developments on the primordial black hole quantization seem to
indicate that the structure formation in the universe behaves under a unified
scheme. This leads to the existence of scaling relations, whose validity could
offer insights on the process of unification between quantum mechanics and
gravity. ... | [
{
"created": "Thu, 18 Oct 2012 13:41:06 GMT",
"version": "v1"
}
] | 2012-10-22 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Cristofano",
"Gerardo",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Luongo",
"Orlando",
""
]
] | Significative developments on the primordial black hole quantization seem to indicate that the structure formation in the universe behaves under a unified scheme. This leads to the existence of scaling relations, whose validity could offer insights on the process of unification between quantum mechanics and gravity. En... |
gr-qc/0009032 | Edward Malec | Edward Malec | How much of the outgoing radiation can be intercepted by
Schwarzschildean black holes? | 5 pages | Acta Phys.Polon. B32 (2001) 47-54 | null | null | gr-qc | null | The Schwarzschild spacetime is for electromagnetic waves like a nonuniform
medium with a varying refraction index. A fraction of an outgoing radiation
scatters off the curvature of the geometry and can be intercepted by a
gravitational center. The amount of the intercepted energy is bounded above by
the backscattered... | [
{
"created": "Mon, 11 Sep 2000 14:09:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Malec",
"Edward",
""
]
] | The Schwarzschild spacetime is for electromagnetic waves like a nonuniform medium with a varying refraction index. A fraction of an outgoing radiation scatters off the curvature of the geometry and can be intercepted by a gravitational center. The amount of the intercepted energy is bounded above by the backscattered e... |
1506.03598 | Xin Liu | Sheng-Fei Feng, Chang-Yu Huang, Yong-Chang Huang, Xin Liu, Ying-Jie
Zhao | Symmetry of Generalized Randall-Sundrum Model and Distribution of
3-Branes in Six-Dimensional Spacetime | 12 pages. 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalization from the usual $5$-dimensional two-brane Randall-Sundrum
(RS) model to a $6$-dimensional multi-brane RS model is presented. The extra
dimensions are extended from one to two; correspondingly the single-variable
warp function is generalized to be a double-variable function, to represent the
two extra ... | [
{
"created": "Thu, 11 Jun 2015 09:27:13 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Feng",
"Sheng-Fei",
""
],
[
"Huang",
"Chang-Yu",
""
],
[
"Huang",
"Yong-Chang",
""
],
[
"Liu",
"Xin",
""
],
[
"Zhao",
"Ying-Jie",
""
]
] | A generalization from the usual $5$-dimensional two-brane Randall-Sundrum (RS) model to a $6$-dimensional multi-brane RS model is presented. The extra dimensions are extended from one to two; correspondingly the single-variable warp function is generalized to be a double-variable function, to represent the two extra di... |
0811.3297 | Sergey Vyatchanin | Andrey A. Rakhubovsky and Sergey P. Vyatchanin | Displacement- and laser-noise-free gravitational-wave detection with two
Fabry-Perot cavities | 7 pages, 4 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose two Fabry-Perot cavities, each pumped through both the mirrors,
positioned in line as a toy model of the gravitational-wave (GW) detector free
from displacement noise of the test masses. It is demonstrated that the
displacement noise of cavity mirrors as well as laser noise can be completely
excluded in a ... | [
{
"created": "Thu, 20 Nov 2008 09:51:40 GMT",
"version": "v1"
}
] | 2008-11-21 | [
[
"Rakhubovsky",
"Andrey A.",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | We propose two Fabry-Perot cavities, each pumped through both the mirrors, positioned in line as a toy model of the gravitational-wave (GW) detector free from displacement noise of the test masses. It is demonstrated that the displacement noise of cavity mirrors as well as laser noise can be completely excluded in a pr... |
1402.7049 | Joan Sola | Joan Sola | Vacuum energy and cosmological evolution | Slightly extended discussion, typos corrected and references added | AIP Conf.Proc. 1606 (2014) 19-37 | 10.1063/1.4891113 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An expanding universe is not expected to have a static vacuum energy density.
The so-called cosmological constant $\Lambda$ should be an approximation,
certainly a good one for a fraction of a Hubble time, but it is most likely a
temporary description of a true dynamical vacuum energy variable that is
evolving from t... | [
{
"created": "Thu, 27 Feb 2014 20:10:45 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Mar 2014 13:23:54 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Sola",
"Joan",
""
]
] | An expanding universe is not expected to have a static vacuum energy density. The so-called cosmological constant $\Lambda$ should be an approximation, certainly a good one for a fraction of a Hubble time, but it is most likely a temporary description of a true dynamical vacuum energy variable that is evolving from the... |
2304.01607 | Chethan Krishnan | Chethan Krishnan, Jude Pereira | Soft Hair on Schwarzschild: A Wrinkle in Birkhoff's Theorem | 30 pp, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The double null form of the Schwarzschild metric is usually arrived at by
demanding Eddington-Finkelstein (EF) conditions at the horizon. This leads to
certain logarithmic fall-offs that are too slow along null directions at
$\mathscr{I}$, resulting in divergences in the covariant surface charges. These
coordinates a... | [
{
"created": "Tue, 4 Apr 2023 08:01:34 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Krishnan",
"Chethan",
""
],
[
"Pereira",
"Jude",
""
]
] | The double null form of the Schwarzschild metric is usually arrived at by demanding Eddington-Finkelstein (EF) conditions at the horizon. This leads to certain logarithmic fall-offs that are too slow along null directions at $\mathscr{I}$, resulting in divergences in the covariant surface charges. These coordinates are... |
1401.6182 | Dejan Stojkovic | Anshul Saini, Dejan Stojkovic | Non-local (but also non-singular) physics at the last stages of
gravitational collapse | Published in Phys. Rev. D 89, 044003 (2014) | Phys. Rev. D 89, 044003 (2014) | 10.1103/PhysRevD.89.044003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the end stages of gravitational collapse of the thin shell of matter
in ingoing Eddington-Finkelstein coordinates. We use the functional Schrodinger
formalism to capture quantum effects in the near singularity limit. We find
that that the equations of motion which govern the behavior of the collapsing
shell ... | [
{
"created": "Thu, 23 Jan 2014 21:00:17 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2014 00:15:16 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Mar 2014 23:27:42 GMT",
"version": "v3"
}
] | 2015-06-18 | [
[
"Saini",
"Anshul",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We study the end stages of gravitational collapse of the thin shell of matter in ingoing Eddington-Finkelstein coordinates. We use the functional Schrodinger formalism to capture quantum effects in the near singularity limit. We find that that the equations of motion which govern the behavior of the collapsing shell ne... |
2110.02542 | Jennifer Rittenhouse West | Francesco Coradeschi, Antonia Micol Frassino, Thiago Guerreiro,
Jennifer Rittenhouse West and Enrico Junior Schioppa | Can we detect the quantum nature of weak gravitational fields? | Submitted to Universe, invited contribution to the topical issue
"Probing Quantum Gravity." | null | 10.3390/universe7110414 | null | gr-qc hep-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | A theoretical framework for the quantization of gravity has been an elusive
Holy Grail since the birth of quantum theory and general relativity. While
generations of scientists have attempted solutions to this deep riddle, an
alternative path built upon the idea that experimental evidence could determine
whether grav... | [
{
"created": "Wed, 6 Oct 2021 07:21:09 GMT",
"version": "v1"
}
] | 2021-11-05 | [
[
"Coradeschi",
"Francesco",
""
],
[
"Frassino",
"Antonia Micol",
""
],
[
"Guerreiro",
"Thiago",
""
],
[
"West",
"Jennifer Rittenhouse",
""
],
[
"Schioppa",
"Enrico Junior",
""
]
] | A theoretical framework for the quantization of gravity has been an elusive Holy Grail since the birth of quantum theory and general relativity. While generations of scientists have attempted solutions to this deep riddle, an alternative path built upon the idea that experimental evidence could determine whether gravit... |
1903.01445 | Tao Lei | Tao Lei, Zi-Wei Chen, Zhen-Lai Wang, and Xiang-Song Chen* | A New Improved Energy-Momentum Tensor and Its Possible Role in Gravity | 14 pages. arXiv admin note: substantial text overlap with
arXiv:1702.02921, arXiv:1701.08658 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by a special consideration in quantum measurement, we present a new
improved energy-momentum tensor. The new tensor differs from the traditional
canonical and symmetric ones, and can be derived as Nother current from a
Lagrangian with second derivative. We also attempt to construct a gravitational
coupling ... | [
{
"created": "Sun, 3 Mar 2019 13:03:49 GMT",
"version": "v1"
}
] | 2019-03-06 | [
[
"Lei",
"Tao",
""
],
[
"Chen",
"Zi-Wei",
""
],
[
"Wang",
"Zhen-Lai",
""
],
[
"Chen*",
"Xiang-Song",
""
]
] | Motivated by a special consideration in quantum measurement, we present a new improved energy-momentum tensor. The new tensor differs from the traditional canonical and symmetric ones, and can be derived as Nother current from a Lagrangian with second derivative. We also attempt to construct a gravitational coupling in... |
1110.5631 | Philipp Hoehn | Philipp A. Hoehn | Effective relational dynamics | 4 pages, based on a talk given at Loops '11 in Madrid, to appear in
Journal of Physics: Conference Series (JPCS) | null | 10.1088/1742-6596/360/1/012014 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a synopsis of an effective approach to the problem of time in the
semiclassical regime. The essential features of this new approach to evaluating
relational quantum dynamics in constrained systems are illustrated by means of
a simple toy model.
| [
{
"created": "Tue, 25 Oct 2011 19:58:07 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Hoehn",
"Philipp A.",
""
]
] | We provide a synopsis of an effective approach to the problem of time in the semiclassical regime. The essential features of this new approach to evaluating relational quantum dynamics in constrained systems are illustrated by means of a simple toy model. |
2402.02386 | Xuefeng Zhang | Dezhi Wang, Xuefeng Zhang, Hui-Zong Duan | On point-ahead angle control strategies for TianQin | 9 pages, 13 figures | Class. Quantum Grav. 41, 117003 (2024) | 10.1088/1361-6382/ad42fb | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pointing-related displacement noises are crucial in space-based gravitational
wave detectors, where point-ahead angle control of transmitted laser beams may
contribute significantly. For TianQin that features a geocentric concept, the
circular high orbit design with a nearly fixed constellation plane gives rise
to sm... | [
{
"created": "Sun, 4 Feb 2024 07:55:25 GMT",
"version": "v1"
}
] | 2024-06-21 | [
[
"Wang",
"Dezhi",
""
],
[
"Zhang",
"Xuefeng",
""
],
[
"Duan",
"Hui-Zong",
""
]
] | Pointing-related displacement noises are crucial in space-based gravitational wave detectors, where point-ahead angle control of transmitted laser beams may contribute significantly. For TianQin that features a geocentric concept, the circular high orbit design with a nearly fixed constellation plane gives rise to smal... |
1210.4012 | Jiang Qing-Quan | Qing-Quan Jiang | Revisit emission spectrum and entropy quantum of the
Reissner-Nordstr\"{o}m black hole | 7 pages | Eur. Phys. J. C72 (2012) 2086 | 10.1140/epjc/s10052-012-2086-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Banerjee and Majhi's recent work shows that black hole's emission spectrum
could be fully reproduced in the tunneling picture, where, as an intriguing
technique, the Kruskal extension was introduced to connect the left and right
modes inside and outside the horizon. Some attempt, as an extension, was
focused on produ... | [
{
"created": "Mon, 15 Oct 2012 12:51:25 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Jiang",
"Qing-Quan",
""
]
] | Banerjee and Majhi's recent work shows that black hole's emission spectrum could be fully reproduced in the tunneling picture, where, as an intriguing technique, the Kruskal extension was introduced to connect the left and right modes inside and outside the horizon. Some attempt, as an extension, was focused on produci... |
gr-qc/0107103 | Maurizio Gasperini | E. Coccia, M. Gasperini and C. Ungarelli | Sensitivity of spherical gravitational-wave detectors to a stochastic
background of non-relativistic scalar radiation | four pages, latex | Phys.Rev.D65:067101,2002 | 10.1103/PhysRevD.65.067101 | BA-TH/01-421 | gr-qc astro-ph hep-th | null | We analyze the signal-to-noise ratio for a relic background of scalar
gravitational radiation composed of massive, non-relativistic particles,
interacting with the monopole mode of two resonant spherical detectors. We find
that the possible signal is enhanced with respect to the differential mode of
the interferometr... | [
{
"created": "Tue, 31 Jul 2001 14:55:10 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Coccia",
"E.",
""
],
[
"Gasperini",
"M.",
""
],
[
"Ungarelli",
"C.",
""
]
] | We analyze the signal-to-noise ratio for a relic background of scalar gravitational radiation composed of massive, non-relativistic particles, interacting with the monopole mode of two resonant spherical detectors. We find that the possible signal is enhanced with respect to the differential mode of the interferometric... |
gr-qc/0605071 | Elizabeth Wickham | E.D.L.Wickham, A.Stroeer, and A.Vecchio | A Markov Chain Monte Carlo approach to the study of massive black hole
binary systems with LISA | submitted to cqg as GWDAW-10 conference proceedings, 10 pages, 4
figures, some changes to plots and numerical details | Class.Quant.Grav. 23 (2006) S819-S828 | 10.1088/0264-9381/23/19/S20 | null | gr-qc astro-ph | null | The Laser Interferometer Space Antenna (LISA) will produce a data stream
containing a vast number of overlapping sources: from strong signals generated
by the coalescence of massive black hole binary systems to much weaker
radiation form sub-stellar mass compact binaries and extreme-mass ratio
inspirals. It has been ... | [
{
"created": "Thu, 11 May 2006 13:59:47 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2006 11:28:29 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Wickham",
"E. D. L.",
""
],
[
"Stroeer",
"A.",
""
],
[
"Vecchio",
"A.",
""
]
] | The Laser Interferometer Space Antenna (LISA) will produce a data stream containing a vast number of overlapping sources: from strong signals generated by the coalescence of massive black hole binary systems to much weaker radiation form sub-stellar mass compact binaries and extreme-mass ratio inspirals. It has been ar... |
gr-qc/9906014 | Steven L. Liebling | Steven L. Liebling | Static Gravitational Global Monopoles | 4 pages, 6 figures | Phys.Rev. D61 (2000) 024030 | 10.1103/PhysRevD.61.024030 | null | gr-qc hep-th | null | Static solutions in spherical symmetry are found for gravitating global
monopoles. Regular solutions lacking a horizon are found for $\eta <
1/\sqrt{8\pi}$, where $\eta$ is the scale of symmetry breaking. Apparently
regular solutions with a horizon are found for $1/\sqrt{8\pi} \le \eta \alt
\sqrt{3/8\pi}$. Though the... | [
{
"created": "Thu, 3 Jun 1999 19:36:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Liebling",
"Steven L.",
""
]
] | Static solutions in spherical symmetry are found for gravitating global monopoles. Regular solutions lacking a horizon are found for $\eta < 1/\sqrt{8\pi}$, where $\eta$ is the scale of symmetry breaking. Apparently regular solutions with a horizon are found for $1/\sqrt{8\pi} \le \eta \alt \sqrt{3/8\pi}$. Though they ... |
2308.10212 | \"Ozg\"ur \"Okc\"u | Zeynep \c{C}oker, \"Ozg\"ur \"Okc\"u, Ekrem Aydiner | Modified Friedmann equations from fractional entropy | 16 pages, 2 figures. References added. Minor corrections | EPL 143 (2023) 59001 | 10.1209/0295-5075/acf158 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Based on the fractional black hole entropy (Jalalzadeh S. et al., Eur. Phys.
J. C, 81 (2021) 632), we derive the modified Friedmann equations from two
different frameworks. First, we consider the modifications of Friedmann
equations from the first law of thermodynamics at the apparent horizon. We show
that the genera... | [
{
"created": "Sun, 20 Aug 2023 09:45:00 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2023 12:51:14 GMT",
"version": "v2"
}
] | 2023-09-06 | [
[
"Çoker",
"Zeynep",
""
],
[
"Ökcü",
"Özgür",
""
],
[
"Aydiner",
"Ekrem",
""
]
] | Based on the fractional black hole entropy (Jalalzadeh S. et al., Eur. Phys. J. C, 81 (2021) 632), we derive the modified Friedmann equations from two different frameworks. First, we consider the modifications of Friedmann equations from the first law of thermodynamics at the apparent horizon. We show that the generali... |
1407.7746 | Benjamin Bahr | Benjamin Bahr | On background-independent renormalization of spin foam models | 23 pages, 12 figures, updated references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we discuss an implementation of renormalization group ideas
to spin foam models, where there is no a priori length scale with which to
define the flow. In the context of the continuum limit of these models, we show
how the notion of cylindrical consistency of path integral measures gives a
natural ana... | [
{
"created": "Tue, 29 Jul 2014 14:53:52 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Sep 2014 14:53:35 GMT",
"version": "v2"
}
] | 2014-09-10 | [
[
"Bahr",
"Benjamin",
""
]
] | In this article we discuss an implementation of renormalization group ideas to spin foam models, where there is no a priori length scale with which to define the flow. In the context of the continuum limit of these models, we show how the notion of cylindrical consistency of path integral measures gives a natural analo... |
1401.4815 | Torsten Asselmeyer-Maluga | T. Asselmeyer-Maluga and J. Krol | Inflation and topological phase transition driven by exotic smoothness | 21 pages, no figures, iopart styla, accepted in Advances in High
Energy Physics, special issue "Experimental Tests of Quantum Gravity and
Exotic Quantum Field Theory Effects (QGEQ)" | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we will discuss a model which describes the cause of inflation
by a topological transition. The guiding principle is the choice of an exotic
smoothness structure for the space-time. Here we consider a space-time with
topology $S^{3}\times\mathbb{R}$. In case of an exotic $S^{3}\times\mathbb{R}$,
there i... | [
{
"created": "Mon, 20 Jan 2014 07:49:51 GMT",
"version": "v1"
}
] | 2014-01-21 | [
[
"Asselmeyer-Maluga",
"T.",
""
],
[
"Krol",
"J.",
""
]
] | In this paper we will discuss a model which describes the cause of inflation by a topological transition. The guiding principle is the choice of an exotic smoothness structure for the space-time. Here we consider a space-time with topology $S^{3}\times\mathbb{R}$. In case of an exotic $S^{3}\times\mathbb{R}$, there is ... |
gr-qc/0412036 | Abd El Fady Morcos | A.B.Morcos | Temperature Fluctuation and an Expected Limit of Hubble Parameter in the
Self-Consistent Model | 8 pages, Latex file | J.Korean Astron.Soc.39:81,2006 | 10.5303/JKAS.2006.39.4.081 | null | gr-qc | null | The temperature gradient of microwave background radiation (CMBR) is
calculated in the Self Consistent Model. An expected values for Hubble
parameter have been presented in two different cases. In the first case the
temperature is treated as a function of time only, while in the other one the
temperature depends on r... | [
{
"created": "Wed, 8 Dec 2004 15:18:12 GMT",
"version": "v1"
}
] | 2017-01-18 | [
[
"Morcos",
"A. B.",
""
]
] | The temperature gradient of microwave background radiation (CMBR) is calculated in the Self Consistent Model. An expected values for Hubble parameter have been presented in two different cases. In the first case the temperature is treated as a function of time only, while in the other one the temperature depends on rel... |
2110.07675 | Marcelo J. Reboucas | N.A. Lemos, D. M\"uller, M.J. Reboucas | Probing spatial orientability of Friedmann--Robertson--Walker spatially
flat spacetime | 15 pages, 3 figures, 2 tables; V2: 29 pages, clarification of
orientability indicator added. New references included. Misprints corrected.
Versions to appear in Phys. Rev. D (2022). arXiv admin note: text overlap
with arXiv:2009.04071 | null | 10.1103/PhysRevD.106.023528 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One important global topological property of a spacetime manifold is
orientability. It is widely believed that spatial orientability can only be
tested by global journeys around the Universe to check for
orientation-reversing closed paths. Since such global journeys are not
feasible, theoretical arguments that combin... | [
{
"created": "Thu, 14 Oct 2021 19:17:23 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2022 16:39:40 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Lemos",
"N. A.",
""
],
[
"Müller",
"D.",
""
],
[
"Reboucas",
"M. J.",
""
]
] | One important global topological property of a spacetime manifold is orientability. It is widely believed that spatial orientability can only be tested by global journeys around the Universe to check for orientation-reversing closed paths. Since such global journeys are not feasible, theoretical arguments that combine ... |
0808.0956 | Sergei Slobodov | Sergei Slobodov | Unwrapping Closed Timelike Curves | 29 pages, 9 figures | Found.Phys.38:1082-1109,2008 | 10.1007/s10701-008-9253-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Closed timelike curves (CTCs) appear in many solutions of the Einstein
equation, even with reasonable matter sources. These solutions appear to
violate causality and so are considered problematic. Since CTCs reflect the
global properties of a spacetime, one can attempt to change its topology,
without changing its geo... | [
{
"created": "Thu, 7 Aug 2008 05:19:25 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Slobodov",
"Sergei",
""
]
] | Closed timelike curves (CTCs) appear in many solutions of the Einstein equation, even with reasonable matter sources. These solutions appear to violate causality and so are considered problematic. Since CTCs reflect the global properties of a spacetime, one can attempt to change its topology, without changing its geome... |
1805.05959 | Giuseppe Fanizza | Giuseppe Fanizza, Jaiyul Yoo, Sang Gyu Biern (Zurich) | Non-linear general relativistic effects in the observed redshift | 44 pages, 1 figure, Version published in JCAP | JCAP 09 (2018) 037 | 10.1088/1475-7516/2018/09/037 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the second-order expression for the observed redshift, accounting
for all the relativistic effects from the light propagation and from the frame
change at the observer and the source positions. We derive the generic
gauge-transformation law that any observable quantities should satisfy, and we
verify our s... | [
{
"created": "Tue, 15 May 2018 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Sep 2018 12:33:11 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Fanizza",
"Giuseppe",
"",
"Zurich"
],
[
"Yoo",
"Jaiyul",
"",
"Zurich"
],
[
"Biern",
"Sang Gyu",
"",
"Zurich"
]
] | We present the second-order expression for the observed redshift, accounting for all the relativistic effects from the light propagation and from the frame change at the observer and the source positions. We derive the generic gauge-transformation law that any observable quantities should satisfy, and we verify our sec... |
gr-qc/0601071 | Sergei Kopeikin | Sergei M. Kopeikin (University of Missouri-Columbia, USA) and Wei-Tou
Ni (The Purple Mountain Observatory, Nanjing, China) | Laser Ranging Delay in the Bi-Metric Theory of Gravity | 6 pages, figure and text improved. To appear in: Proceedings of the
359th WE-Heraeus Seminar on "Lasers, Clocks, and Drag-Free: Technologies for
Future Exploration in Space and Tests of Gravity"}, ZARM, Bremen, Germany,
May 30-June 1, 2005 | null | null | null | gr-qc | null | We introduce a linearized bi-metric theory of gravity with two metrics. The
metric g_{ab} describes null hypersurfaces of the gravitational field while
light moves on null hypersurfaces of the optical metric \bar{g}_{ab}.
Bi-metrism naturally arises in vector-tensor theories with matter being
non-minimally coupled to... | [
{
"created": "Wed, 18 Jan 2006 01:06:26 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Mar 2006 01:14:46 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kopeikin",
"Sergei M.",
"",
"University of Missouri-Columbia, USA"
],
[
"Ni",
"Wei-Tou",
"",
"The Purple Mountain Observatory, Nanjing, China"
]
] | We introduce a linearized bi-metric theory of gravity with two metrics. The metric g_{ab} describes null hypersurfaces of the gravitational field while light moves on null hypersurfaces of the optical metric \bar{g}_{ab}. Bi-metrism naturally arises in vector-tensor theories with matter being non-minimally coupled to g... |
1102.0385 | Farid Ya. Khalili | F.Ya.Khalili | Pass-through Mach-Zehnder topologies for macroscopic quantum
measurements | 11 pages, 9 figures | Phys.Rev.D83:122001,2011 | 10.1103/PhysRevD.83.122001 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several relatively small-scale experimental setups aimed on prototyping of
future laser gravitational-wave detectors and testing of new methods of quantum
measurements with macroscopic mechanical objects, are under development now. In
these devices, not devoted directly to the gravitational-wave detection,
Mach-Zehnd... | [
{
"created": "Wed, 2 Feb 2011 08:56:57 GMT",
"version": "v1"
}
] | 2011-06-13 | [
[
"Khalili",
"F. Ya.",
""
]
] | Several relatively small-scale experimental setups aimed on prototyping of future laser gravitational-wave detectors and testing of new methods of quantum measurements with macroscopic mechanical objects, are under development now. In these devices, not devoted directly to the gravitational-wave detection, Mach-Zehnder... |
1706.04361 | Riccardo Moriconi | Riccardo Moriconi and Giovanni Montani | Behavior of the Universe anisotropy in a big-bounce cosmology | 20 pages, 7 figures | null | 10.1103/PhysRevD.95.123533 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the classical and quantum behavior of a Bianchi I model in the
presence of a stiff matter contribution when the Vilenkin interpretation of the
wave function of the Universe is taken into account. We study its evolution in
the so-called polymer representation of quantum mechanics, in order to
characteri... | [
{
"created": "Wed, 14 Jun 2017 08:34:54 GMT",
"version": "v1"
}
] | 2017-08-02 | [
[
"Moriconi",
"Riccardo",
""
],
[
"Montani",
"Giovanni",
""
]
] | We investigate the classical and quantum behavior of a Bianchi I model in the presence of a stiff matter contribution when the Vilenkin interpretation of the wave function of the Universe is taken into account. We study its evolution in the so-called polymer representation of quantum mechanics, in order to characterize... |
1505.00205 | Michael Coughlin | Michael Coughlin and Patrick Meyers and Shivaraj Kandhasamy and Eric
Thrane and Nelson Christensen | Chasing 5-sigma: Prospects for searches for long-duration
gravitational-waves without time slides | null | Phys. Rev. D 92, 043007 (2015) | 10.1103/PhysRevD.92.043007 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of unmodeled gravitational-wave bursts by ground-based
interferometric gravitational-wave detectors is a major goal for the advanced
detector era. These searches are commonly cast as pattern recognition problems,
where the goal is to identify statistically significant clusters in
spectrograms of strain ... | [
{
"created": "Fri, 1 May 2015 15:46:32 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Coughlin",
"Michael",
""
],
[
"Meyers",
"Patrick",
""
],
[
"Kandhasamy",
"Shivaraj",
""
],
[
"Thrane",
"Eric",
""
],
[
"Christensen",
"Nelson",
""
]
] | The detection of unmodeled gravitational-wave bursts by ground-based interferometric gravitational-wave detectors is a major goal for the advanced detector era. These searches are commonly cast as pattern recognition problems, where the goal is to identify statistically significant clusters in spectrograms of strain po... |
gr-qc/9709008 | Alexander L. Gromov | Alexander Gromov (St-Petersburg State Thechnical University, Russia) | Singularities, initial and boundary problems for the Tolman-Bondi model | LaTeX,7 pages | null | null | null | gr-qc | null | Boundary problem for Tolman-Bondi model is formulated. One-to-one
correspondence between singularities hypersurfaces and initial conditions of
the Tolman-Bondi model is constructed.
| [
{
"created": "Wed, 3 Sep 1997 19:44:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gromov",
"Alexander",
"",
"St-Petersburg State Thechnical University, Russia"
]
] | Boundary problem for Tolman-Bondi model is formulated. One-to-one correspondence between singularities hypersurfaces and initial conditions of the Tolman-Bondi model is constructed. |
1205.4016 | Benjamin C. Harms | Peter L. Biermann and Benjamin C. Harms | A graviton statistics approach to dark energy, inflation and black holes | 75 pages, 7 figures, additional text to clarify key points,
typographical errors corrected, additional references, the model and its
predictions are unchanged | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive two new equations of quantum gravity and combine them with
reinterpretations of previously proposed concepts of dark energy, inflation and
black holes into a theory which may be a first step toward a comprehensive
description of all three phenomena. The resulting theory also predicts new
tests which can be ... | [
{
"created": "Thu, 17 May 2012 19:40:58 GMT",
"version": "v1"
},
{
"created": "Wed, 23 May 2012 19:39:37 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Aug 2012 15:21:45 GMT",
"version": "v3"
},
{
"created": "Wed, 22 Aug 2012 22:21:07 GMT",
"version": "v4"
},
{
"c... | 2013-02-15 | [
[
"Biermann",
"Peter L.",
""
],
[
"Harms",
"Benjamin C.",
""
]
] | We derive two new equations of quantum gravity and combine them with reinterpretations of previously proposed concepts of dark energy, inflation and black holes into a theory which may be a first step toward a comprehensive description of all three phenomena. The resulting theory also predicts new tests which can be ex... |
gr-qc/0605154 | Scott Pollack | Scott E Pollack and Robin Tuck Stebbins | Demonstration of the Zero-Crossing Phasemeter with a LISA Test-bed
Interferometer | find minor corrections in the CQG version | Class.Quant.Grav.23:4189-4200,2006 | 10.1088/0264-9381/23/12/014 | null | gr-qc | null | The Laser Interferometer Space Antenna (LISA) is being designed to detect and
study in detail gravitational waves from sources throughout the Universe such
as massive black hole binaries. The conceptual formulation of the LISA
space-borne gravitational wave detector is now well developed. The
interferometric measurem... | [
{
"created": "Wed, 31 May 2006 19:31:49 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Pollack",
"Scott E",
""
],
[
"Stebbins",
"Robin Tuck",
""
]
] | The Laser Interferometer Space Antenna (LISA) is being designed to detect and study in detail gravitational waves from sources throughout the Universe such as massive black hole binaries. The conceptual formulation of the LISA space-borne gravitational wave detector is now well developed. The interferometric measuremen... |
1108.5760 | Jan Hlad\'ik | Jan Hladik, Zdenek Stuchlik | Photon and neutrino redshift in the field of braneworld compact stars | null | JCAP07(2011)012 | 10.1088/1475-7516/2011/07/012 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravitational redshift of photons and neutrinos radiated by the
braneworld neutron or quark stars that are considered in the framework of the
simple model of the internal spacetime with uniform distribution of energy
density, and the external spacetime described by the Reissner-Nordstr\"{o}m
geometry charact... | [
{
"created": "Mon, 29 Aug 2011 21:29:39 GMT",
"version": "v1"
}
] | 2011-08-31 | [
[
"Hladik",
"Jan",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | We study gravitational redshift of photons and neutrinos radiated by the braneworld neutron or quark stars that are considered in the framework of the simple model of the internal spacetime with uniform distribution of energy density, and the external spacetime described by the Reissner-Nordstr\"{o}m geometry character... |
0804.3944 | Nora Breton | Aaron V. B. Arellano (1), Nora Breton (2), Ricardo Garcia-Salcedo
(3),((1) Universidad Aut\'onoma del Estado de M\'exico, (2) Centro de
Investigaci\'on y de Estudios Avanzados del I.P.N., Mexico (3) CICATA-IPN,
Mexico) | Some properties of evolving wormhole geometries within nonlinear
electrodynamics | 13 pages, 3(ps) figures | Gen.Rel.Grav.41:2561-2578,2009 | 10.1007/s10714-009-0780-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we review some properties for the evolving wormhole solution of
Einstein equations coupled with nonlinear electrodynamics. We integrate the
geodesic equations in the effective geometry obeyed by photons; we check out
the weak field limit and find the traversability conditions. Then we analyze
the case w... | [
{
"created": "Thu, 24 Apr 2008 15:19:41 GMT",
"version": "v1"
}
] | 2010-01-08 | [
[
"Arellano",
"Aaron V. B.",
""
],
[
"Breton",
"Nora",
""
],
[
"Garcia-Salcedo",
"Ricardo",
""
]
] | In this paper we review some properties for the evolving wormhole solution of Einstein equations coupled with nonlinear electrodynamics. We integrate the geodesic equations in the effective geometry obeyed by photons; we check out the weak field limit and find the traversability conditions. Then we analyze the case whe... |
1604.00269 | Mindaugas Karciauskas Dr. | Mindaugas Kar\v{c}iauskas | Dynamical Analysis of Anisotropic Inflation | 17 pages, 2 figures | null | 10.1142/S0217732316400022 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflaton coupling to a vector field via the $f^2(\phi)F_{\mu\nu}F^{\mu\nu}$
term is used in several contexts in the literature, such as to generate
primordial magnetic fields, to produce statistically anisotropic curvature
perturbation, to support anisotropic inflation and to circumvent the
$\eta$-problem. Here, I pe... | [
{
"created": "Thu, 31 Mar 2016 13:50:23 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Aug 2016 18:40:15 GMT",
"version": "v2"
}
] | 2016-09-01 | [
[
"Karčiauskas",
"Mindaugas",
""
]
] | Inflaton coupling to a vector field via the $f^2(\phi)F_{\mu\nu}F^{\mu\nu}$ term is used in several contexts in the literature, such as to generate primordial magnetic fields, to produce statistically anisotropic curvature perturbation, to support anisotropic inflation and to circumvent the $\eta$-problem. Here, I perf... |
gr-qc/0507111 | Luc Blanchet | Luc Blanchet | General relativity and the spiral of compact binary stars | 8 pages, in "Images de la Physique 2005", eds. E. Falgarone et al.,
Editions du C.N.R.S., p. 51, 2005 (in French) | null | null | null | gr-qc | null | The theory of general relativity, which is extremely well verified by classic
tests in the solar system as well as by the radiation of the binary pulsar, is
one of the fundamental tools of nowadays astrophysics. It permits the
computation of the gravitational wave form emitted during the inspiral phase of
binary syst... | [
{
"created": "Tue, 26 Jul 2005 18:12:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Blanchet",
"Luc",
""
]
] | The theory of general relativity, which is extremely well verified by classic tests in the solar system as well as by the radiation of the binary pulsar, is one of the fundamental tools of nowadays astrophysics. It permits the computation of the gravitational wave form emitted during the inspiral phase of binary system... |
1703.08655 | Bernard J. Carr | B. J. Carr | Quantum Black Holes as the Link Between Microphysics and Macrophysics | 9 pages, 7 figures, 2015 Karl Schwarzschild Meeting on Gravitational
Physics, eds. P. Nicolini, J. Mureika, M. Kaminski and M. Bleicher | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There appears to be a duality between elementary particles, which span the
mass range below the Planck scale, and black holes, which span the mass range
range above it. In particular, the Black Hole Uncertainty Principle
Correspondence posits a smooth transition between the Compton and Schwarzschild
scales as a funct... | [
{
"created": "Sat, 25 Mar 2017 06:50:02 GMT",
"version": "v1"
}
] | 2017-03-28 | [
[
"Carr",
"B. J.",
""
]
] | There appears to be a duality between elementary particles, which span the mass range below the Planck scale, and black holes, which span the mass range range above it. In particular, the Black Hole Uncertainty Principle Correspondence posits a smooth transition between the Compton and Schwarzschild scales as a functio... |
0707.0900 | Eduard Alexis Larranaga Rubio | Alexis Larranaga | Traversable Wormholes Construction in (2+1) Gravity | 13 pages, 2 figures | Rev. Col. Fis. 40,2 (2008) 222-224 | null | null | gr-qc | null | Wormholes have been always an interesting object in gravity theories. In this
paper we make a little review of the principal properties of these objects and
the exotic matter they need to exist. Then, we obtain two specific solutions in
the formalism of (2+1)-dimensional gravity with negative cosmological constant.
T... | [
{
"created": "Fri, 6 Jul 2007 02:55:58 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jul 2007 13:28:12 GMT",
"version": "v2"
}
] | 2008-07-17 | [
[
"Larranaga",
"Alexis",
""
]
] | Wormholes have been always an interesting object in gravity theories. In this paper we make a little review of the principal properties of these objects and the exotic matter they need to exist. Then, we obtain two specific solutions in the formalism of (2+1)-dimensional gravity with negative cosmological constant. The... |
1806.09837 | Chul-Moon Yoo | Takahisa Igata, Hideki Ishihara, Masataka Tsuchiya, Chul-Moon Yoo | Rigidly Rotating String Sticking in a Kerr Black Hole | 20 pages, 5 figures | Phys. Rev. D 98, 064021 (2018) | 10.1103/PhysRevD.98.064021 | RUP-18-16, OCU-PHYS-481, AP-GR-146 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze rigidly rotating Nambu--Goto strings in the Kerr spacetime,
particularly focusing on the strings sticking in the horizon. From the
regularity on the horizon, we find the condition for sticking in the horizon,
which is consistent with the second law of the black hole thermodynamics.
Energy extraction throug... | [
{
"created": "Tue, 26 Jun 2018 08:15:45 GMT",
"version": "v1"
}
] | 2018-09-19 | [
[
"Igata",
"Takahisa",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Tsuchiya",
"Masataka",
""
],
[
"Yoo",
"Chul-Moon",
""
]
] | We analyze rigidly rotating Nambu--Goto strings in the Kerr spacetime, particularly focusing on the strings sticking in the horizon. From the regularity on the horizon, we find the condition for sticking in the horizon, which is consistent with the second law of the black hole thermodynamics. Energy extraction through ... |
2205.13584 | Behnam Pourhassan | Behnam Pourhassan, Mahdi Atashi, Houcine Aounallah, Salman Sajad Wani,
Mir Faizal, Barun Majumder | Quantum Thermodynamics of a Quantum Sized AdS Black Hole | 15pages, 6 figures. Accepted for publication in NPB | Nucl.Phys.B 980 (2022) 115842 | 10.1016/j.nuclphysb.2022.115842 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the effects of non-perturbative quantum
gravitational corrections on a quantum sized AdS black hole. It will be
observed that these non-perturbative quantum gravitational corrections modify
the stability of this black hole. We will use the non-equilibrium quantum
thermodynamics to invest... | [
{
"created": "Thu, 26 May 2022 19:01:17 GMT",
"version": "v1"
}
] | 2022-06-22 | [
[
"Pourhassan",
"Behnam",
""
],
[
"Atashi",
"Mahdi",
""
],
[
"Aounallah",
"Houcine",
""
],
[
"Wani",
"Salman Sajad",
""
],
[
"Faizal",
"Mir",
""
],
[
"Majumder",
"Barun",
""
]
] | In this paper, we investigate the effects of non-perturbative quantum gravitational corrections on a quantum sized AdS black hole. It will be observed that these non-perturbative quantum gravitational corrections modify the stability of this black hole. We will use the non-equilibrium quantum thermodynamics to investig... |
gr-qc/9210012 | Alan R. Steif | S. Deser and Alan R. Steif | No Time Machines from Lightlike Sources in 2+1 Gravity | 13 pages | Directions in general relativity, vol 1 (Cambridge U Press 1993) | null | Brandeis preprint BRX-TH-336 | gr-qc hep-th | null | We extend the argument that spacetimes generated by two timelike particles in
D=3 gravity (or equivalently by parallel-moving cosmic strings in D=4) permit
closed timelike curves (CTC) only at the price of Misner identifications that
correspond to unphysical boundary conditions at spatial infinity and to a
tachyonic ... | [
{
"created": "Wed, 21 Oct 1992 16:22:07 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Deser",
"S.",
""
],
[
"Steif",
"Alan R.",
""
]
] | We extend the argument that spacetimes generated by two timelike particles in D=3 gravity (or equivalently by parallel-moving cosmic strings in D=4) permit closed timelike curves (CTC) only at the price of Misner identifications that correspond to unphysical boundary conditions at spatial infinity and to a tachyonic ce... |
gr-qc/9712063 | Frank Gronwald | Frank Gronwald, Uwe Muench, Alfredo Mac\'ias, Friedrich W. Hehl | Volume elements of spacetime and a quartet of scalar fields | 7 pages RevTEX, submitted to Phys. Rev. D | Phys. Rev. D 58, 084021 (1998) | 10.1103/PhysRevD.58.084021 | null | gr-qc hep-th | null | Starting with a `bare' 4-dimensional differential manifold as a model of
spacetime, we discuss the options one has for defining a volume element which
can be used for physical theories. We show that one has to prescribe a scalar
density \sigma. Whereas conventionally \sqrt{|\det g_{ij}|} is used for that
purpose, wit... | [
{
"created": "Mon, 15 Dec 1997 18:52:04 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Gronwald",
"Frank",
""
],
[
"Muench",
"Uwe",
""
],
[
"Macías",
"Alfredo",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | Starting with a `bare' 4-dimensional differential manifold as a model of spacetime, we discuss the options one has for defining a volume element which can be used for physical theories. We show that one has to prescribe a scalar density \sigma. Whereas conventionally \sqrt{|\det g_{ij}|} is used for that purpose, with ... |
1101.1736 | Tanwi Ghosh | Tanwi Ghosh and Soumitra Sengupta | Tunneling across dilaton coupled black holes in anti de Sitter spacetime | 9 pages and 2 figures | Phys.Lett.B696:167-172,2011 | 10.1016/j.physletb.2010.12.016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering generalised action for dilaton coupled Maxwell-Einstein theory in
four dimensions, Gao and Zhang obtained black holes solutions for
asymptotically anti de Sitter (Ads) and de Sitter (ds) spacetimes. We study the
Hawking radiation in Parikh-Wilczek's tunneling formalism as well as using
Bogoliubov transfor... | [
{
"created": "Mon, 10 Jan 2011 08:56:41 GMT",
"version": "v1"
}
] | 2011-02-18 | [
[
"Ghosh",
"Tanwi",
""
],
[
"Sengupta",
"Soumitra",
""
]
] | Considering generalised action for dilaton coupled Maxwell-Einstein theory in four dimensions, Gao and Zhang obtained black holes solutions for asymptotically anti de Sitter (Ads) and de Sitter (ds) spacetimes. We study the Hawking radiation in Parikh-Wilczek's tunneling formalism as well as using Bogoliubov transforma... |
gr-qc/0210073 | Tiberiu Harko | T.Harko, M. K. Mak | Bianchi type I universes with dilaton and magnetic fields | 10 pages, 4 figures | Int.J.Mod.Phys. D11 (2002) 1171-1182 | 10.1142/S0218271802002141 | null | gr-qc | null | We consider the dynamics of a Bianchi type I spacetime in the presence of
dilaton and magnetic fields. The general solution of the Einstein-Maxwell
dilaton field equations can be obtained in an exact parametric form. Depending
on the numerical values of the parameters of the model there are three distinct
classes of ... | [
{
"created": "Tue, 22 Oct 2002 08:26:13 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Harko",
"T.",
""
],
[
"Mak",
"M. K.",
""
]
] | We consider the dynamics of a Bianchi type I spacetime in the presence of dilaton and magnetic fields. The general solution of the Einstein-Maxwell dilaton field equations can be obtained in an exact parametric form. Depending on the numerical values of the parameters of the model there are three distinct classes of so... |
2207.13146 | Thanasis Karakasis | Thanasis Karakasis, George Koutsoumbas, Andri Machattou, Eleftherios
Papantonopoulos | Magnetically Charged Euler-Heisenberg Black Holes with Scalar Hair | Some typos corrected, accepted for publication in PRD | Phys. Rev. D 106, 104006 (2022) | 10.1103/PhysRevD.106.104006 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the Einstein-Euler-Heisenberg theory in the presence of a self
interacting scalar field, minimally coupled to gravity. We solve analytically
the field equations for the magnetically charged case and we obtain novel
magnetically charged hairy black holes. The scalar field dresses the black hole
with a seconda... | [
{
"created": "Tue, 26 Jul 2022 18:56:00 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2022 19:26:56 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Oct 2022 07:05:15 GMT",
"version": "v3"
}
] | 2022-11-15 | [
[
"Karakasis",
"Thanasis",
""
],
[
"Koutsoumbas",
"George",
""
],
[
"Machattou",
"Andri",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We study the Einstein-Euler-Heisenberg theory in the presence of a self interacting scalar field, minimally coupled to gravity. We solve analytically the field equations for the magnetically charged case and we obtain novel magnetically charged hairy black holes. The scalar field dresses the black hole with a secondary... |
2003.13935 | Andrea Giusti | Valerio Faraoni, Andrea Giusti, Jeremy C\^ot\'e | Turnaround radius in scalar-tensor gravity with quasilocal mass | 10 pages, no figures, to appear in Phys.Rev.D | Phys. Rev. D 102, 044002 (2020) | 10.1103/PhysRevD.102.044002 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following an existing procedure in general relativity, the turnaround radius
of a spherical structure is studied in scalar-tensor gravity using a new
prescription for the analog of the Hawking-Hayward quasilocal mass in this
class of theories.
| [
{
"created": "Tue, 31 Mar 2020 03:19:33 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2020 06:24:57 GMT",
"version": "v2"
}
] | 2020-08-12 | [
[
"Faraoni",
"Valerio",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Côté",
"Jeremy",
""
]
] | Following an existing procedure in general relativity, the turnaround radius of a spherical structure is studied in scalar-tensor gravity using a new prescription for the analog of the Hawking-Hayward quasilocal mass in this class of theories. |
2111.06987 | David Reitze | Peter Couvares, Ian Bird, Ed Porter, Stefano Bagnasco, Michele
Punturo, David Reitze, Stavros Katsanevas, Takaaki Kajita, Vicky Kalogera,
Harald Lueck, David McClelland, Sheila Rowan, Gary Sanders, B.S.
Sathyaprakash, David Shoemaker, Jo van den Brand | Gravitational Wave Data Analysis: Computing Challenges in the 3G Era | 26 pages, no figures | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Cyber infrastructure will be a critical consideration in the development of
next generation gravitational-wave detectors. The demand for data analysis
computing in the 3G era will be driven by the high number of detections as well
as the expanded search parameter space for compact astrophysical objects and
the subseq... | [
{
"created": "Fri, 12 Nov 2021 23:46:07 GMT",
"version": "v1"
}
] | 2021-11-16 | [
[
"Couvares",
"Peter",
""
],
[
"Bird",
"Ian",
""
],
[
"Porter",
"Ed",
""
],
[
"Bagnasco",
"Stefano",
""
],
[
"Punturo",
"Michele",
""
],
[
"Reitze",
"David",
""
],
[
"Katsanevas",
"Stavros",
""
],
[
"... | Cyber infrastructure will be a critical consideration in the development of next generation gravitational-wave detectors. The demand for data analysis computing in the 3G era will be driven by the high number of detections as well as the expanded search parameter space for compact astrophysical objects and the subseque... |
1804.04007 | Subhajit Saha | Anindita Mondal and Subhajit Saha | A closer look at the Barboza-Alcaniz equation of state parametrization | 6 pages, 3 figures | Romanian Journal of Physics 63, 106 (2018) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Barboza-Alcaniz EoS parametrization has been considered and its
$q$-parametrization has been investigated in search for a thermodynamic
motivation. For this, we have studied the validity of the generalized second
law of thermodynamics as well as the thermodynamic equilibrium considering the
cosmological apparent ... | [
{
"created": "Mon, 9 Apr 2018 19:01:39 GMT",
"version": "v1"
}
] | 2018-04-12 | [
[
"Mondal",
"Anindita",
""
],
[
"Saha",
"Subhajit",
""
]
] | The Barboza-Alcaniz EoS parametrization has been considered and its $q$-parametrization has been investigated in search for a thermodynamic motivation. For this, we have studied the validity of the generalized second law of thermodynamics as well as the thermodynamic equilibrium considering the cosmological apparent ho... |
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