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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1408.4697 | Georgios Lukes Gerakopoulos | Georgios Lukes-Gerakopoulos, George Contopoulos, Theocharis A.
Apostolatos | Non-Linear Effects in Non-Kerr spacetimes | 8 pages, 3 Figures; to appear in the proceedings of the conference
"Relativity and Gravitation: 100 Years after Einstein in Prague" (2012) | null | 10.1007/978-3-319-06761-2_16 | null | gr-qc nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a chance that the spacetime around massive compact objects which are
expected to be black holes is not described by the Kerr metric, but by a metric
which can be considered as a perturbation of the Kerr metric. These non-Kerr
spacetimes are also known as bumpy black hole spacetimes. We expect that, if
some k... | [
{
"created": "Wed, 20 Aug 2014 15:35:52 GMT",
"version": "v1"
}
] | 2014-09-09 | [
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Contopoulos",
"George",
""
],
[
"Apostolatos",
"Theocharis A.",
""
]
] | There is a chance that the spacetime around massive compact objects which are expected to be black holes is not described by the Kerr metric, but by a metric which can be considered as a perturbation of the Kerr metric. These non-Kerr spacetimes are also known as bumpy black hole spacetimes. We expect that, if some kin... |
gr-qc/0208068 | Navin Singh | S.C. Tiwari (Institute of Natural Philosophy 1, Kusum Kutir,
Mahamanapuri, Varanasi, India) | Time varying velocity of light | Published in Proceedings of "Einstein Centenary Symposium, 1980 at
Nagpur, India | null | null | null | gr-qc | null | Recently there has been a lot of intersest in the superluminal phenomena, and
time varying velocity of light cosmological models. More than two decades ago
at Einstein centenary symposium, Nagpur I had put forward space-time
interaction hypothesis. One of its predictions was that velocity of light
decreased with the ... | [
{
"created": "Fri, 23 Aug 2002 08:35:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tiwari",
"S. C.",
"",
"Institute of Natural Philosophy 1, Kusum Kutir,\n Mahamanapuri, Varanasi, India"
]
] | Recently there has been a lot of intersest in the superluminal phenomena, and time varying velocity of light cosmological models. More than two decades ago at Einstein centenary symposium, Nagpur I had put forward space-time interaction hypothesis. One of its predictions was that velocity of light decreased with the ag... |
2405.07235 | Shu-Min Wu | Shu-Min Wu, Rui-Di Wang, Xiao-Li Huang, Zejun Wang | Does gravitational wave assist vacuum steering and Bell nonlocality? | 19 pages, 3 figures | JHEP 07 (2024) 155 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study quantum steering and Bell nonlocality harvested by the local
interaction of two Unruh-DeWitt detectors with the vacuum massless scalar
field, both in the presence of gravitational waves and in Minkowski spacetime.
It is shown that quantum steerability under the influence of gravitational
waves can be greater... | [
{
"created": "Sun, 12 May 2024 09:39:16 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2024 15:44:54 GMT",
"version": "v2"
}
] | 2024-07-19 | [
[
"Wu",
"Shu-Min",
""
],
[
"Wang",
"Rui-Di",
""
],
[
"Huang",
"Xiao-Li",
""
],
[
"Wang",
"Zejun",
""
]
] | We study quantum steering and Bell nonlocality harvested by the local interaction of two Unruh-DeWitt detectors with the vacuum massless scalar field, both in the presence of gravitational waves and in Minkowski spacetime. It is shown that quantum steerability under the influence of gravitational waves can be greater t... |
gr-qc/0205019 | Roberto Colistete Junior | R. Colistete Jr., C. Leygnac, R. Kerner | Higher-order geodesic deviations applied to the Kerr metric | 17 pages, LaTeX | Class.Quant.Grav. 19 (2002) 4573-4590 | 10.1088/0264-9381/19/17/309 | null | gr-qc astro-ph | null | Starting with an exact and simple geodesic, we generate approximate geodesics
by summing up higher-order geodesic deviations within a General Relativistic
setting, without using Newtonian and post-Newtonian approximations. We apply
this method to the problem of closed orbital motion of test particles in the
Kerr metr... | [
{
"created": "Mon, 6 May 2002 08:08:22 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Colistete",
"R.",
"Jr."
],
[
"Leygnac",
"C.",
""
],
[
"Kerner",
"R.",
""
]
] | Starting with an exact and simple geodesic, we generate approximate geodesics by summing up higher-order geodesic deviations within a General Relativistic setting, without using Newtonian and post-Newtonian approximations. We apply this method to the problem of closed orbital motion of test particles in the Kerr metric... |
gr-qc/0606083 | Valerii Dryuma sem | Valerii Dryuma | Around a theory of a Walker spaces | 4 pages, CAIM XIV, Chisinau | null | null | null | gr-qc | null | An examples of a Ricci-flat of four-dimensional spaces with a Walker metrics
and their generalizations are constructed. The properties of corresponding
geodesic equations are discussed.
| [
{
"created": "Mon, 19 Jun 2006 19:37:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dryuma",
"Valerii",
""
]
] | An examples of a Ricci-flat of four-dimensional spaces with a Walker metrics and their generalizations are constructed. The properties of corresponding geodesic equations are discussed. |
gr-qc/0302068 | Chris Clarkson | C. A. Clarkson, A. A. Coley, E. S. D. O'Neill, R. A. Sussman and R. K.
Barrett | Inhomogeneous cosmologies, the Copernican principle and the cosmic
microwave background: More on the EGS theorem | 17 pages; to appear in GRG | Gen.Rel.Grav. 35 (2003) 969-990 | 10.1023/A:1024094215852 | null | gr-qc | null | We discuss inhomogeneous cosmological models which satisfy the Copernican
principle. We construct some inhomogeneous cosmological models starting from
the ansatz that the all the observers in the models view an isotropic cosmic
microwave background. We discuss multi-fluid models, and illustrate how more
general inhom... | [
{
"created": "Mon, 17 Feb 2003 15:07:25 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Clarkson",
"C. A.",
""
],
[
"Coley",
"A. A.",
""
],
[
"O'Neill",
"E. S. D.",
""
],
[
"Sussman",
"R. A.",
""
],
[
"Barrett",
"R. K.",
""
]
] | We discuss inhomogeneous cosmological models which satisfy the Copernican principle. We construct some inhomogeneous cosmological models starting from the ansatz that the all the observers in the models view an isotropic cosmic microwave background. We discuss multi-fluid models, and illustrate how more general inhomog... |
1509.00212 | Victor Berezin | V.A. Berezin, V.I. Dokuchaev, Yu.N. Eroshenko | Conformal gravity and "gravitational bubbles" | 7 pages, Talk given at the 9th Alexander Friedmann International
Seminar on Gravitation and Cosmology, June 21, 2015 - June 27, 2015, Saint
Petersburg, Russia | Intern. J. Mod. Phys. A 31, 1641004 (2016) | 10.1142/S0217751X16410049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the general structure of the spherically symmetric solutions in
the Weyl conformal gravity. The corresponding Bach equations are derived for
the special type of metrics, which can be considered as the representative of
the general class. The complete set of the pure vacuum solutions, consisting of
two cla... | [
{
"created": "Tue, 1 Sep 2015 10:19:22 GMT",
"version": "v1"
}
] | 2016-04-21 | [
[
"Berezin",
"V. A.",
""
],
[
"Dokuchaev",
"V. I.",
""
],
[
"Eroshenko",
"Yu. N.",
""
]
] | We describe the general structure of the spherically symmetric solutions in the Weyl conformal gravity. The corresponding Bach equations are derived for the special type of metrics, which can be considered as the representative of the general class. The complete set of the pure vacuum solutions, consisting of two class... |
gr-qc/9910111 | Hirayama Tooru | T.Hirayama, T.Hara (Kyoto Sangyo U.) | A Calculation on the Self-field of a Point Charge and the Unruh Effect | 25 pages, Submitted to Prog. Theor. Phys | Prog.Theor.Phys. 103 (2000) 907 | 10.1143/PTP.103.907 | null | gr-qc | null | Within the context of quantum field theory in curved spacetimes, Hacyan and
Sarmiento defined the vacuum stress-energy tensor with respect to the
accelerated observer. They calculated it for uniform acceleration and circular
motion, and derived that the rotating observer perceives a flux. Mane related
the flux to syn... | [
{
"created": "Mon, 1 Nov 1999 10:49:45 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Nov 1999 11:20:01 GMT",
"version": "v2"
},
{
"created": "Sun, 21 Nov 1999 05:07:00 GMT",
"version": "v3"
},
{
"created": "Mon, 24 Jul 2000 05:46:31 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Hirayama",
"T.",
"",
"Kyoto Sangyo U."
],
[
"Hara",
"T.",
"",
"Kyoto Sangyo U."
]
] | Within the context of quantum field theory in curved spacetimes, Hacyan and Sarmiento defined the vacuum stress-energy tensor with respect to the accelerated observer. They calculated it for uniform acceleration and circular motion, and derived that the rotating observer perceives a flux. Mane related the flux to synch... |
1503.01928 | Maria E. Gabach Clement | Mar\'ia E. Gabach Clement | Shape of black holes | Proceedings of the Gravitation, Relativistic Astrophysics and
Cosmology Second Argentinian-Brazilian Meeting, 2014. G.S. Vila, F.L. Vieyro
and J. Fabris, eds. A proper reference to Senovilla's article arXiv:
0709.0695 was added to the fourth and fifth paragraphs in the review Section
4 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that celestial bodies tend to be spherical due to gravity
and that rotation produces deviations from this sphericity. We discuss what is
known and expected about the shape of black holes' horizons from their
formation to their final, stationary state.
We present some recent results showing that bla... | [
{
"created": "Fri, 6 Mar 2015 12:18:29 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2015 16:23:27 GMT",
"version": "v2"
}
] | 2015-03-11 | [
[
"Clement",
"María E. Gabach",
""
]
] | It is well known that celestial bodies tend to be spherical due to gravity and that rotation produces deviations from this sphericity. We discuss what is known and expected about the shape of black holes' horizons from their formation to their final, stationary state. We present some recent results showing that black h... |
1101.3752 | Bahram Mashhoon | Bahram Mashhoon | Nonlocal Gravity | 9 pages, based on invited lectures delivered at the XIV Brazilian
School of Cosmology and Gravitation (August 30 - September 11, 2010); v2:
minor improvements, published in: Cosmology and Gravitation, edited by M.
Novello and S. E. Perez Begliaffa (Cambridge Scientific Publishers, UK,
2011), pp. 1-9 | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of measurements of accelerated observers in Minkowski spacetime
has led to the development of nonlocal special relativity theory. Inertia and
gravitation are intimately connected in accordance with the principle of
equivalence. We therefore seek a nonlocal generalization of the theory of
gravitation such... | [
{
"created": "Wed, 19 Jan 2011 18:35:23 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Oct 2012 21:37:53 GMT",
"version": "v2"
}
] | 2012-10-11 | [
[
"Mashhoon",
"Bahram",
""
]
] | The analysis of measurements of accelerated observers in Minkowski spacetime has led to the development of nonlocal special relativity theory. Inertia and gravitation are intimately connected in accordance with the principle of equivalence. We therefore seek a nonlocal generalization of the theory of gravitation such t... |
2404.05883 | Edgar Gasperin | Edgar Gasperin and Francisco Pais | Twistor initial data characterisation of pp-waves | 7 pages | null | 10.1088/1361-6382/ad3b5e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note gives a concise derivation of a twistor-initial-data
characterisation of pp-wave spacetimes in vacuum. The construction is based on
a similar calculation for the Minkowski spacetime in [Class. Quantum Grav. 28
075010]. The key difference is that for the Minkowski spacetime a necessary
condition is that $\na... | [
{
"created": "Mon, 8 Apr 2024 21:45:50 GMT",
"version": "v1"
}
] | 2024-04-10 | [
[
"Gasperin",
"Edgar",
""
],
[
"Pais",
"Francisco",
""
]
] | This note gives a concise derivation of a twistor-initial-data characterisation of pp-wave spacetimes in vacuum. The construction is based on a similar calculation for the Minkowski spacetime in [Class. Quantum Grav. 28 075010]. The key difference is that for the Minkowski spacetime a necessary condition is that $\nabl... |
gr-qc/9506068 | Nobuyuki Sakai | Nobuyuki Sakai, Hisa-aki Shinkai, Takashi Tachizawa and Kei-ichi Maeda | Dynamics of Topological Defects and Inflation | 12 pages, revtex, 13 figures, some discussions are modified, to
appear in Phys.Rev.D | Phys.Rev.D53:655,1996; Erratum-ibid.D54:2981,1996;
Phys.Rev.D54:2981,1996 | 10.1103/PhysRevD.53.655 10.1103/PhysRevD.54.2981 | WU-AP/49/95 | gr-qc astro-ph hep-th | null | We study the dynamics of topological defects in the context of ``topological
inflation" proposed by Vilenkin and Linde independently. Analysing the time
evolution of planar domain walls and of global monopoles, we find that the
defects undergo inflationary expansion if $\eta\stackrel{>}{\sim}0.33m_{Pl}$,
where $\eta$... | [
{
"created": "Wed, 28 Jun 1995 14:24:37 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 1995 12:18:23 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Oct 1995 08:01:45 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Sakai",
"Nobuyuki",
""
],
[
"Shinkai",
"Hisa-aki",
""
],
[
"Tachizawa",
"Takashi",
""
],
[
"Maeda",
"Kei-ichi",
""
]
] | We study the dynamics of topological defects in the context of ``topological inflation" proposed by Vilenkin and Linde independently. Analysing the time evolution of planar domain walls and of global monopoles, we find that the defects undergo inflationary expansion if $\eta\stackrel{>}{\sim}0.33m_{Pl}$, where $\eta$ i... |
1910.07715 | Sung-Won Kim | YuRi Kang and Sung-Won Kim | The Gravitational Perturbation of a Morris-Thorne Wormhole and The
Newman-Penrose Formalism | 20 pages, 6 figures | null | 10.1088/1361-6382/ab7dd8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational perturbation of the Morris-Thorne wormhole has been derived
by using the Newman-Penrose formalism. We apply Teukolsky equation to the
wormhole spacetime, compute the perturbed Weyl scalars, $\Psi_{4}^{(1)}$ and
obtain its master equation, decomposed in spin weighted spherical harmonics
with spin wei... | [
{
"created": "Thu, 17 Oct 2019 05:28:30 GMT",
"version": "v1"
}
] | 2020-06-17 | [
[
"Kang",
"YuRi",
""
],
[
"Kim",
"Sung-Won",
""
]
] | The gravitational perturbation of the Morris-Thorne wormhole has been derived by using the Newman-Penrose formalism. We apply Teukolsky equation to the wormhole spacetime, compute the perturbed Weyl scalars, $\Psi_{4}^{(1)}$ and obtain its master equation, decomposed in spin weighted spherical harmonics with spin weigh... |
gr-qc/9704073 | Alejandro Cabo | Alejandro Cabo and Eloy Ayon | About Black Holes Without Trapping Interior | LaTeX, four separated postscript figures | Int.J.Mod.Phys. A14 (1999) 2013-2022 | 10.1142/S0217751X99001019 | null | gr-qc | null | Physical arguments related with the existence of black hole solutions having
a non trapping interior are discussed. Massive scalar fields interacting with
gravity are considered. Interior asymptotic solutions showing a scalar field
approaching a constant value at the horizon are given. It is argued that the
coupled E... | [
{
"created": "Sat, 26 Apr 1997 18:36:53 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Cabo",
"Alejandro",
""
],
[
"Ayon",
"Eloy",
""
]
] | Physical arguments related with the existence of black hole solutions having a non trapping interior are discussed. Massive scalar fields interacting with gravity are considered. Interior asymptotic solutions showing a scalar field approaching a constant value at the horizon are given. It is argued that the coupled Ein... |
gr-qc/0102014 | Roberto Casadio | G.L. Alberghi, R. Casadio, G.P. Vacca, G. Venturi | Gravitational Collapse of a Radiating Shell | LaTeX, 34 pages, 21 EPS figures included | Phys.Rev.D64:104012,2001 | 10.1103/PhysRevD.64.104012 | null | gr-qc astro-ph hep-ph hep-th | null | We study the collapse of a self-gravitating and radiating shell. Matter
constituting the shell is quantized and the construction is viewed as a
semiclassical model of possible black hole formation. It is shown that the
shell internal degrees of freedom are excited by the quantum non-adiabaticity
of the collapse and, ... | [
{
"created": "Mon, 5 Feb 2001 08:40:43 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Aug 2001 07:36:41 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alberghi",
"G. L.",
""
],
[
"Casadio",
"R.",
""
],
[
"Vacca",
"G. P.",
""
],
[
"Venturi",
"G.",
""
]
] | We study the collapse of a self-gravitating and radiating shell. Matter constituting the shell is quantized and the construction is viewed as a semiclassical model of possible black hole formation. It is shown that the shell internal degrees of freedom are excited by the quantum non-adiabaticity of the collapse and, co... |
gr-qc/9802013 | Frank Antonsen | Frank Antonsen, Karsten Bormann | Casimir driven evolution of the universe | LaTeX, 11 figures (postscript). Revised edition. New references added | null | null | null | gr-qc astro-ph hep-th | null | For a Friedman-Robertson-Walker space-time in which the only contribution to
the stress-energy tensor comes from the renormalised zero-point energy (i.e.
the Casimir energy) of the fundamental fields the evolution of the universe
(the scale factor) depends upon whether the universe is open, flat or closed
and upon wh... | [
{
"created": "Wed, 4 Feb 1998 14:22:45 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Aug 1998 11:31:44 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Antonsen",
"Frank",
""
],
[
"Bormann",
"Karsten",
""
]
] | For a Friedman-Robertson-Walker space-time in which the only contribution to the stress-energy tensor comes from the renormalised zero-point energy (i.e. the Casimir energy) of the fundamental fields the evolution of the universe (the scale factor) depends upon whether the universe is open, flat or closed and upon whic... |
gr-qc/0512169 | Jonathan Thornburg | Jonathan Thornburg | Event and Apparent Horizon Finders for 3+1 Numerical Relativity | 79 pages, 20 postscript figures including 12 in color, invited review
article for Living Reviews in Relativity, uses epubtk.sty (included) | Living Rev.Rel.10:3,2007 | null | AEI-2005-184 | gr-qc | null | Event and apparent horizons are key diagnostics for the presence and
properties of black holes. In this article I review numerical algorithms and
codes for finding event and apparent horizons in numerically-computed
spacetimes, focusing on calculations done using the 3+1 ADM formalism.
There are 3 basic algorithms ... | [
{
"created": "Fri, 30 Dec 2005 20:56:27 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jan 2006 20:41:21 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Thornburg",
"Jonathan",
""
]
] | Event and apparent horizons are key diagnostics for the presence and properties of black holes. In this article I review numerical algorithms and codes for finding event and apparent horizons in numerically-computed spacetimes, focusing on calculations done using the 3+1 ADM formalism. There are 3 basic algorithms for ... |
1611.03668 | Daniele Pranzetti | Laurent Freidel, Alejandro Perez and Daniele Pranzetti | The loop gravity string | 15 pages, 1 figure | Phys. Rev. D 95, 106002 (2017) | 10.1103/PhysRevD.95.106002 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study canonical gravity in finite regions for which we
introduce a generalisation of the Gibbons-Hawking boundary term including the
Immirzi parameter. We study the canonical formulation on a spacelike
hypersuface with a boundary sphere and show how the presence of this term leads
to an unprecedented ... | [
{
"created": "Fri, 11 Nov 2016 11:52:31 GMT",
"version": "v1"
}
] | 2017-05-10 | [
[
"Freidel",
"Laurent",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | In this work we study canonical gravity in finite regions for which we introduce a generalisation of the Gibbons-Hawking boundary term including the Immirzi parameter. We study the canonical formulation on a spacelike hypersuface with a boundary sphere and show how the presence of this term leads to an unprecedented ty... |
2212.12321 | Jainendra Kumar Singh Dr. | J. K. Singh, Shaily, Ratbay Myrzakulov, Harshna Balhara | A constrained cosmological model in $f(R,L_m)$ gravity | 14 pages, 11 figures | null | 10.1016/j.newast.2023.102070 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article, we study the expanding nature of universe in the contest of
$f(R,L_m)$ gravity theory, here $ R $ represents the Ricci scalar and $ L_m $
is the matter Lagrangian density. With a specific form of $ f(R,L_m) $, we
obtain the field equations for flat FLRW metric. We parametrize the
deceleration paramet... | [
{
"created": "Thu, 22 Dec 2022 18:21:16 GMT",
"version": "v1"
}
] | 2023-06-28 | [
[
"Singh",
"J. K.",
""
],
[
"Shaily",
"",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Balhara",
"Harshna",
""
]
] | In this article, we study the expanding nature of universe in the contest of $f(R,L_m)$ gravity theory, here $ R $ represents the Ricci scalar and $ L_m $ is the matter Lagrangian density. With a specific form of $ f(R,L_m) $, we obtain the field equations for flat FLRW metric. We parametrize the deceleration parameter... |
1810.09316 | Seokcheon Lee | Young-Hwan Hyun, Yoonbai Kim, and Seokcheon Lee | The Exact Amplitudes of Six Polarization Modes for Gravitational Waves | 27 pages, 3 figures, 3 tables | Phys. Rev. D 99, 124002 (2019) | 10.1103/PhysRevD.99.124002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formalism of the exact six polarization modes of gravitational waves is
constructed in terms of both the small metric perturbations and the
Newman-Penrose scalars. The obtained formulae are applicable to any
metric-compatible gravity theories whose gravitational waves propagate along
either the null or non-null g... | [
{
"created": "Mon, 22 Oct 2018 14:27:14 GMT",
"version": "v1"
}
] | 2019-06-19 | [
[
"Hyun",
"Young-Hwan",
""
],
[
"Kim",
"Yoonbai",
""
],
[
"Lee",
"Seokcheon",
""
]
] | The formalism of the exact six polarization modes of gravitational waves is constructed in terms of both the small metric perturbations and the Newman-Penrose scalars. The obtained formulae are applicable to any metric-compatible gravity theories whose gravitational waves propagate along either the null or non-null geo... |
2008.13025 | George Zilioti | J.A.S. Lima, G.J.M. Zilioti, L.C.T. Brito | Extended Metastable Dark Energy | 9 pages, 3 figures and 4 tables | Physics of the Dark Universe 30 (2020) 100713 Volume 30, December
2020, 100713 | 10.1016/j.dark.2020.100713 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The metastable dark energy scenario is revisited by assuming that the current
false vacuum energy density is the remnant from a primeval inflationary stage.
The zero temperature scalar field potential is here described by an even power
series up to order six which depends on 3 free parameters: the mass of the
scalar ... | [
{
"created": "Sat, 29 Aug 2020 17:53:49 GMT",
"version": "v1"
}
] | 2020-09-01 | [
[
"Lima",
"J. A. S.",
""
],
[
"Zilioti",
"G. J. M.",
""
],
[
"Brito",
"L. C. T.",
""
]
] | The metastable dark energy scenario is revisited by assuming that the current false vacuum energy density is the remnant from a primeval inflationary stage. The zero temperature scalar field potential is here described by an even power series up to order six which depends on 3 free parameters: the mass of the scalar fi... |
1703.01272 | Charles Wang | Charles H.-T. Wang, Elliott Mansfield, Teodora Oniga | Cosmic quantum optical probing of quantum gravity through a
gravitational lensLens | 4 pages, 2 figures, references updated | null | null | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the nonunitary quantum dynamics of neutral massless scalar
particles used to model photons around a massive gravitational lens. The
gravitational interaction between the lensing mass and asymptotically free
particles is described by their second-quantized scattering wavefunctions.
Remarkably, the zero-poi... | [
{
"created": "Fri, 3 Mar 2017 18:06:55 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Oct 2018 12:29:32 GMT",
"version": "v2"
}
] | 2018-10-09 | [
[
"Wang",
"Charles H. -T.",
""
],
[
"Mansfield",
"Elliott",
""
],
[
"Oniga",
"Teodora",
""
]
] | We consider the nonunitary quantum dynamics of neutral massless scalar particles used to model photons around a massive gravitational lens. The gravitational interaction between the lensing mass and asymptotically free particles is described by their second-quantized scattering wavefunctions. Remarkably, the zero-point... |
0711.3833 | Shahram Jalalzadeh | P. Pedram, M. Mirzaei, S. Jalalzadeh and S. S. Gousheh | Perfect fluid quantum Universe in the presence of negative cosmological
constant | 22 pages, 13 figures, 4 table, to appear in GRG | Gen.Rel.Grav.40:1663-1681,2008 | 10.1007/s10714-007-0566-4 | null | gr-qc | null | We present perfect fluid Friedmann-Robertson-Walker quantum cosmological
models in the presence of negative cosmological constant. In this work the
Schutz's variational formalism is applied for radiation, dust, cosmic string,
and domain wall dominated Universes with positive, negative, and zero constant
spatial curva... | [
{
"created": "Sat, 24 Nov 2007 12:20:56 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pedram",
"P.",
""
],
[
"Mirzaei",
"M.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Gousheh",
"S. S.",
""
]
] | We present perfect fluid Friedmann-Robertson-Walker quantum cosmological models in the presence of negative cosmological constant. In this work the Schutz's variational formalism is applied for radiation, dust, cosmic string, and domain wall dominated Universes with positive, negative, and zero constant spatial curvatu... |
1911.07435 | Takuya Morita | Takuya Morita and Jiro Soda | Arrival Time Differences of Lensed Massive Gravitational Waves | 14 pages, 3 figures | null | null | KOBE-COSMO-19-20 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is of fundamental importance to know the mass of gravitons. A simple
method for constraining the graviton mass is to compare the arrival time of
light and that of gravitational waves provided that both waves are
simultaneously emitted from the same source. To date, from observations of
gravitational waves by the L... | [
{
"created": "Mon, 18 Nov 2019 05:29:21 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Feb 2020 03:18:04 GMT",
"version": "v2"
}
] | 2020-02-10 | [
[
"Morita",
"Takuya",
""
],
[
"Soda",
"Jiro",
""
]
] | It is of fundamental importance to know the mass of gravitons. A simple method for constraining the graviton mass is to compare the arrival time of light and that of gravitational waves provided that both waves are simultaneously emitted from the same source. To date, from observations of gravitational waves by the LIG... |
0812.1916 | Alexei Zayats | Alexander B. Balakin, Heinz Dehnen, Alexei E. Zayats | Non-minimal monopoles of the Dirac type as realization of the censorship
conjecture | 9 pages; one reference added, accepted to Phys. Rev. D | Phys.Rev.D79:024007,2009 | 10.1103/PhysRevD.79.024007 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a class of exact solutions of a three-parameter non-minimally
extended Einstein-Maxwell model, which are attributed to non-minimal magnetic
monopoles of the Dirac type. We focus on the investigation of the gravitational
field of Dirac monopoles for those models, for which the singularity at the
central poi... | [
{
"created": "Wed, 10 Dec 2008 13:53:24 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Dec 2008 11:44:44 GMT",
"version": "v2"
}
] | 2009-02-24 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Dehnen",
"Heinz",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | We discuss a class of exact solutions of a three-parameter non-minimally extended Einstein-Maxwell model, which are attributed to non-minimal magnetic monopoles of the Dirac type. We focus on the investigation of the gravitational field of Dirac monopoles for those models, for which the singularity at the central point... |
gr-qc/9708048 | Esteban Calzetta | Esteban Calzetta (IAFE and Physics Department, University of Buenos
Aires) | Relativistic fluctuating hydrodynamics | Latex, 25 pages, no figures, new references and detailed derivations | Class.Quant.Grav. 15 (1998) 653-667 | 10.1088/0264-9381/15/3/015 | null | gr-qc | null | We derive the formulae of fluctuating hydrodynamics appropiate to a
relativistically consistent divergence type theory, obtaining Landau - Lifshitz
fluctuating hydrodynamics as a limiting case.
| [
{
"created": "Wed, 20 Aug 1997 18:57:40 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Nov 1997 19:51:33 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Calzetta",
"Esteban",
"",
"IAFE and Physics Department, University of Buenos\n Aires"
]
] | We derive the formulae of fluctuating hydrodynamics appropiate to a relativistically consistent divergence type theory, obtaining Landau - Lifshitz fluctuating hydrodynamics as a limiting case. |
2010.13838 | Celia Escamilla-Rivera | Celia Escamilla-Rivera | Precision Cosmology in Modified and Extended Theories of Gravity: an
insightful test | 6 pages, 5 figures, contribution for IWARA 2020. Accepted for
publication in Astronomische Nachrichten | Astronomische Nachrichten 2021 | 10.1002/asna.202113882 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a brief discussion about modified and extended
cosmological models using current observational tests. We show that according
to these astrophysical samples based in late universe measurements, theories
like $f(R)$ and $f(T,B)$ can provide useful interpretation to a dynamical dark
energy. At th... | [
{
"created": "Mon, 26 Oct 2020 18:50:38 GMT",
"version": "v1"
}
] | 2021-01-25 | [
[
"Escamilla-Rivera",
"Celia",
""
]
] | In this work we present a brief discussion about modified and extended cosmological models using current observational tests. We show that according to these astrophysical samples based in late universe measurements, theories like $f(R)$ and $f(T,B)$ can provide useful interpretation to a dynamical dark energy. At this... |
1203.3957 | Ippocratis Saltas | Mark Hindmarsh and Ippocratis D. Saltas | f(R) Gravity from the renormalisation group | 15 pages, 8 figures | null | null | HIP-2012-07/TH | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the cosmological dynamics of an effective f(R) model constructed
from a renormalisation group (RG) improvement of the Einstein--Hilbert action,
using the non-perturbative beta functions of the exact renormalisation group
equation. The resulting f(R) model has some remarkable properties. It naturally
exhibi... | [
{
"created": "Sun, 18 Mar 2012 14:45:21 GMT",
"version": "v1"
}
] | 2012-03-20 | [
[
"Hindmarsh",
"Mark",
""
],
[
"Saltas",
"Ippocratis D.",
""
]
] | We explore the cosmological dynamics of an effective f(R) model constructed from a renormalisation group (RG) improvement of the Einstein--Hilbert action, using the non-perturbative beta functions of the exact renormalisation group equation. The resulting f(R) model has some remarkable properties. It naturally exhibits... |
2110.12222 | Gabriele Gionti S.J. | Matteo Galaverni and Gabriele Gionti S.J. | Jordan and Einstein Frames from the perspective of $\omega=-3/2$
Hamiltonian Brans-Dicke theory | corrected some typos, more references added | null | 10.1103/PhysRevD.105.084008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carefully perform a Hamiltonian Dirac's constraint analysis of
$\omega=-\frac{3}{2}$ Brans-Dicke theory with Gibbons-Hawking-York (GHY)
boundary term. The Poisson brackets are computed via functional derivatives.
After a brief summary of the results for $\omega\neq-\frac{3}{2}$ case, we
derive all Hamiltonian Dira... | [
{
"created": "Sat, 23 Oct 2021 13:58:47 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Nov 2021 19:45:14 GMT",
"version": "v2"
}
] | 2023-06-02 | [
[
"Galaverni",
"Matteo",
""
],
[
"J.",
"Gabriele Gionti S.",
""
]
] | We carefully perform a Hamiltonian Dirac's constraint analysis of $\omega=-\frac{3}{2}$ Brans-Dicke theory with Gibbons-Hawking-York (GHY) boundary term. The Poisson brackets are computed via functional derivatives. After a brief summary of the results for $\omega\neq-\frac{3}{2}$ case, we derive all Hamiltonian Dirac'... |
2308.12089 | Shahram Jalalzadeh | S. Jalalzadeh, H. Moradpour, and P.V. Moniz | Modified cosmology from quantum deformed entropy | 16 pages, 8 figures, to appear in Physics of the Dark Universe | Phys. Dark Univ. 42 (2023) 101320 | 10.1016/j.dark.2023.101320 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In Ref. [S. Jalalzadeh, Phys. Lett. B 829 (2022) 137058], Jalalzadeh
established that the thermodynamical entropy of a quantum-deformed black hole
with horizon area $A$ can be written as $S_q=\pi\sin\left(\frac{A}{8G\mathcal
N} \right)/\sin\left(\frac{\pi}{2\mathcal N} \right)$, where $\mathcal
N=L_q^2/L_\text{P}^2$,... | [
{
"created": "Wed, 23 Aug 2023 12:20:41 GMT",
"version": "v1"
}
] | 2023-09-25 | [
[
"Jalalzadeh",
"S.",
""
],
[
"Moradpour",
"H.",
""
],
[
"Moniz",
"P. V.",
""
]
] | In Ref. [S. Jalalzadeh, Phys. Lett. B 829 (2022) 137058], Jalalzadeh established that the thermodynamical entropy of a quantum-deformed black hole with horizon area $A$ can be written as $S_q=\pi\sin\left(\frac{A}{8G\mathcal N} \right)/\sin\left(\frac{\pi}{2\mathcal N} \right)$, where $\mathcal N=L_q^2/L_\text{P}^2$, $... |
1801.02063 | Valery Zhdanov | V.I. Zhdanov and S.S. Dylda | Scalar field vs hydrodynamic models in the homogeneous isotropic
cosmology | 7 pages; LATEX; reference added | Phys. Rev. D 97, 124033 (2018) | 10.1103/PhysRevD.97.124033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study relations between hydrodynamical (H) and scalar field (SF) models of
the dark energy in the early Universe. Main attention is paid to SF described
by the canonical Lagrangian within the homogeneous isotropic spatially flat
cosmology. We analyze requirements that guarantee the same cosmological history
for th... | [
{
"created": "Sat, 6 Jan 2018 18:32:32 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jan 2018 17:18:12 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Jun 2018 20:57:00 GMT",
"version": "v3"
}
] | 2018-06-20 | [
[
"Zhdanov",
"V. I.",
""
],
[
"Dylda",
"S. S.",
""
]
] | We study relations between hydrodynamical (H) and scalar field (SF) models of the dark energy in the early Universe. Main attention is paid to SF described by the canonical Lagrangian within the homogeneous isotropic spatially flat cosmology. We analyze requirements that guarantee the same cosmological history for the ... |
2206.14808 | Dr. Goutam Manna | Arijit Panda, Saibal Ray, Goutam Manna, Surajit Das, and Chayan Ranjit | Cosmological effects on $f(\bar{R},\bar{T})$ gravity through a
non-standard theory | 12 pages, 20 figures, 4 tables, Accepted from IJMPD | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-sa/4.0/ | This study aims to investigate the impact of dark energy in cosmological
scenarios by exploiting $f(\bar{R},\bar{T})$ gravity within the framework of a
{\it non-standard} theory, called {\it {\bf K-}essence} theory, where $\bar{R}$
represents the Ricci scalar and $\bar{T}$ denotes the trace of the
energy-momentum ten... | [
{
"created": "Tue, 28 Jun 2022 18:21:46 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2023 16:43:13 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Feb 2024 12:59:08 GMT",
"version": "v3"
}
] | 2024-02-28 | [
[
"Panda",
"Arijit",
""
],
[
"Ray",
"Saibal",
""
],
[
"Manna",
"Goutam",
""
],
[
"Das",
"Surajit",
""
],
[
"Ranjit",
"Chayan",
""
]
] | This study aims to investigate the impact of dark energy in cosmological scenarios by exploiting $f(\bar{R},\bar{T})$ gravity within the framework of a {\it non-standard} theory, called {\it {\bf K-}essence} theory, where $\bar{R}$ represents the Ricci scalar and $\bar{T}$ denotes the trace of the energy-momentum tenso... |
2006.04011 | Umananda Dev Goswami | Dhruba Jyoti Gogoi and Umananda Dev Goswami | A new f(R) Gravity Model and properties of Gravitational Waves in it | 25 pages, 16 figures | Eur. Phys. J. C (2020) 80:1101 | 10.1140/epjc/s10052-020-08684-3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we have introduced a new $f(R)$ gravity model as an attempt to
have a model with more parametric control, so that the model can be used to
explain the existing problems as well as to explore new directions in physics
of gravity, by properly constraining it with recent observational data. Here
basic aim... | [
{
"created": "Sun, 7 Jun 2020 01:10:57 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Dec 2020 11:30:44 GMT",
"version": "v2"
}
] | 2020-12-03 | [
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | In this paper, we have introduced a new $f(R)$ gravity model as an attempt to have a model with more parametric control, so that the model can be used to explain the existing problems as well as to explore new directions in physics of gravity, by properly constraining it with recent observational data. Here basic aim i... |
1801.03389 | Mark Bugden | Mark Bugden | Spherical Photon Orbits around a 5D Myers-Perry Black Hole | 17 pages, 12 figures | null | 10.1007/s10714-018-2352-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of bound null geodesics with fixed coordinate radius
around a five-dimensional rotating black hole. These spherical photon orbits
are not confined to a plane, and can exhibit interesting quasiperiodic
behaviour. We provide necessary conditions for the existence of these orbits,
and explicitly comp... | [
{
"created": "Wed, 10 Jan 2018 14:25:20 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Bugden",
"Mark",
""
]
] | We study the motion of bound null geodesics with fixed coordinate radius around a five-dimensional rotating black hole. These spherical photon orbits are not confined to a plane, and can exhibit interesting quasiperiodic behaviour. We provide necessary conditions for the existence of these orbits, and explicitly comput... |
gr-qc/0001087 | Manuel H. Tiglio | Reinaldo J. Gleiser and Manuel H. Tiglio | Exotic spacetimes, superconducting strings with linear momentum, and
(not quite) all that | 13 pages with no figures. Accepted in PRD | Phys.Rev. D61 (2000) 104006 | 10.1103/PhysRevD.61.104006 | null | gr-qc | null | We derive the general exact vacuum metrics associated with a stationary (non
static), non rotating, cylindrically symmetric source. An analysis of the
geometry described by these vacuum metrics shows that they contain a subfamily
of metrics that, although admitting a consistent time orientation, display
"exotic" prop... | [
{
"created": "Thu, 27 Jan 2000 01:21:24 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gleiser",
"Reinaldo J.",
""
],
[
"Tiglio",
"Manuel H.",
""
]
] | We derive the general exact vacuum metrics associated with a stationary (non static), non rotating, cylindrically symmetric source. An analysis of the geometry described by these vacuum metrics shows that they contain a subfamily of metrics that, although admitting a consistent time orientation, display "exotic" proper... |
2006.13247 | Bence Racsk\'o | Bence Racsk\'o, L\'aszl\'o \'Arp\'ad Gergely | Lanczos equation on light-like hypersurfaces in a cosmologically viable
class of kinetic gravity braiding theories | 8 pages, this article belongs to the Special Issue Cosmological
Inflation, Dark Matter and Dark Energy | Symmetry 2019, 11(5), 616 | 10.3390/sym11050616 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss junction conditions across null hypersurfaces in a class of
scalar-tensor gravity theories with i) second order dynamics, ii) obeying the
recent constraints imposed by gravitational wave propagation, and iii) allowing
for a cosmologically viable evolution. These requirements select kinetic
gravity braiding... | [
{
"created": "Tue, 23 Jun 2020 18:02:03 GMT",
"version": "v1"
}
] | 2020-06-25 | [
[
"Racskó",
"Bence",
""
],
[
"Gergely",
"László Árpád",
""
]
] | We discuss junction conditions across null hypersurfaces in a class of scalar-tensor gravity theories with i) second order dynamics, ii) obeying the recent constraints imposed by gravitational wave propagation, and iii) allowing for a cosmologically viable evolution. These requirements select kinetic gravity braiding m... |
2107.00600 | LIGO Scientific Collaboration, Virgo Collaboration and KAGRA Col | The LIGO Scientific Collaboration, the Virgo Collaboration, and the
KAGRA Collaboration: R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K.
Ackley, A. Adams, C. Adams, R. X. Adhikari, V. B. Adya, C. Affeldt, D.
Agarwal, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A.
Ain, P. Ajith, T. Akutsu... | All-sky Search for Continuous Gravitational Waves from Isolated Neutron
Stars in the Early O3 LIGO Data | 28 pages, 7 figures | Phys. Rev. D 104, 082004 (2021) | 10.1103/PhysRevD.104.082004 | LIGO-P2000334-v9 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We report on an all-sky search for continuous gravitational waves in the
frequency band 20-2000\,Hz and with a frequency time derivative in the range of
$[-1.0, +0.1]\times10^{-8}$\,Hz/s. Such a signal could be produced by a nearby,
spinning and slightly non-axisymmetric isolated neutron star in our galaxy.
This sear... | [
{
"created": "Thu, 1 Jul 2021 16:41:00 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Oct 2021 20:18:25 GMT",
"version": "v2"
}
] | 2021-10-13 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"the KAGRA Collaboration",
"",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abraham",
"S.",
""
],
[
"Acernese",... | We report on an all-sky search for continuous gravitational waves in the frequency band 20-2000\,Hz and with a frequency time derivative in the range of $[-1.0, +0.1]\times10^{-8}$\,Hz/s. Such a signal could be produced by a nearby, spinning and slightly non-axisymmetric isolated neutron star in our galaxy. This search... |
1608.03813 | Abraao Capistrano | Abra\~ao J. S. Capistrano, Antonio C. Guti\'errez-Pi\~neres | Effective perihelion advance and potentials in a conformastatic
background with magnetic field | 11 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1601.00746 | Advances in Astronomy, v. 2016, p. 1-10, 2016 | 10.1155/2016/9193627 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An Exact solution of the Einstein-Maxwell field equations for a
conformastatic metric with magnetized sources is study. In this context,
effective potential are studied in order to understand the dynamics of the
magnetic field in galaxies. We derive the equations of motion for neutral and
charged particles in a space... | [
{
"created": "Thu, 11 Aug 2016 14:12:26 GMT",
"version": "v1"
}
] | 2017-04-06 | [
[
"Capistrano",
"Abraão J. S.",
""
],
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
]
] | An Exact solution of the Einstein-Maxwell field equations for a conformastatic metric with magnetized sources is study. In this context, effective potential are studied in order to understand the dynamics of the magnetic field in galaxies. We derive the equations of motion for neutral and charged particles in a spaceti... |
1501.05045 | Stephen McCormick | Stephen McCormick | A note on mass-minimising extensions | 17 pages. Substantial changes to Section 3. Updated to agree with
published version | Gen.Rel.Grav., 47(12), 145. 2015 | 10.1007/s10714-015-1993-2 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A conjecture related to the Bartnik quasilocal mass, is that the infimum of
the ADM energy, over an appropriate space of extensions to a compact 3-manifold
with boundary, is realised by a static metric. It was shown by Corvino [Comm.
Math. Phys. 214(1), (2000)] that if the infimum is indeed achieved, then it is
achie... | [
{
"created": "Wed, 21 Jan 2015 03:23:33 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Jan 2015 02:39:28 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Feb 2015 09:45:09 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Apr 2015 00:25:28 GMT",
"version": "v4"
},
{
"cr... | 2015-11-10 | [
[
"McCormick",
"Stephen",
""
]
] | A conjecture related to the Bartnik quasilocal mass, is that the infimum of the ADM energy, over an appropriate space of extensions to a compact 3-manifold with boundary, is realised by a static metric. It was shown by Corvino [Comm. Math. Phys. 214(1), (2000)] that if the infimum is indeed achieved, then it is achieve... |
1505.00332 | Florent Michel | Florent Michel, Renaud Parentani | Black hole radiation in the presence of a universal horizon | 19 pages, 9 figures, final version published in Physical Review D | Phys. Rev. D 91, 124049 (2015) | 10.1103/PhysRevD.91.124049 | LPT-Orsay-15-30 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Ho\v{r}ava and Einstein-{\AE}ther theories of modified gravity, in spite
of the violation of Lorentz invariance, spherically-symmetric stationary black
hole solutions possess an inner universal horizon which separates field
configurations into two disconnected classes. We compute the late time
radiation emitted by... | [
{
"created": "Sat, 2 May 2015 11:02:56 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2015 22:38:02 GMT",
"version": "v2"
}
] | 2015-07-10 | [
[
"Michel",
"Florent",
""
],
[
"Parentani",
"Renaud",
""
]
] | In Ho\v{r}ava and Einstein-{\AE}ther theories of modified gravity, in spite of the violation of Lorentz invariance, spherically-symmetric stationary black hole solutions possess an inner universal horizon which separates field configurations into two disconnected classes. We compute the late time radiation emitted by a... |
gr-qc/9712096 | Friedrich W. Hehl | Friedrich W. Hehl (University of Cologne) | Alternative Gravitational Theories in Four Dimensions | 10 pages, LaTeX2e, uses mprocl.sty | Report of parallel session chair in: Proc. 8th M. Grossmann
Meeting, T. Piran (ed.) World Scientific, Singapore 1998, to be published | null | University of Cologne preprint Cologne-ThP-He-97-19 | gr-qc | null | We argue that from the point of view of gauge theory and of an appropriate
interpretation of the interferometer experiments with matter waves in a
gravitational field, the Einstein-Cartan theory is the best theory of gravity
available. Alternative viable theories are general relativity and a certain
teleparallelism m... | [
{
"created": "Fri, 26 Dec 1997 23:44:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hehl",
"Friedrich W.",
"",
"University of Cologne"
]
] | We argue that from the point of view of gauge theory and of an appropriate interpretation of the interferometer experiments with matter waves in a gravitational field, the Einstein-Cartan theory is the best theory of gravity available. Alternative viable theories are general relativity and a certain teleparallelism mod... |
1411.1002 | Alesandro Santos A. F. Santos | C. J. Ferst and A. F. Santos | G\"{o}del-type solution in $f(R,T)$ modified gravity | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will examine the problem of violation of causality in
$f(R,T)$ modified gravity, where $R$ is the Ricci scalar and $T$ is the trace
of the energy-momentum tensor $T_{\mu\nu}$. We investigate the causality
problem in two special cases, in the first we consider the matter content of
the universe as a ... | [
{
"created": "Tue, 4 Nov 2014 19:01:15 GMT",
"version": "v1"
}
] | 2014-11-05 | [
[
"Ferst",
"C. J.",
""
],
[
"Santos",
"A. F.",
""
]
] | In this paper, we will examine the problem of violation of causality in $f(R,T)$ modified gravity, where $R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor $T_{\mu\nu}$. We investigate the causality problem in two special cases, in the first we consider the matter content of the universe as a pe... |
gr-qc/9903002 | Avraham E. Mayo | Jacob D. Bekenstein and Avraham E. Mayo | Black hole polarization and new entropy bounds | 21 pages, RevTex, Regularization of potential made clearer. Error in
energy of the particle corrected with no consequence for final conclusions.
New references added | Phys.Rev. D61 (2000) 024022 | 10.1103/PhysRevD.61.024022 | null | gr-qc astro-ph hep-th | null | Zaslavskii has suggested how to tighten Bekenstein's bound on entropy when
the object is electrically charged. Recently Hod has provided a second tighter
version of the bound applicable when the object is rotating. Here we derive
Zaslavskii's optimized bound by considering the accretion of an ordinary
charged object ... | [
{
"created": "Sun, 28 Feb 1999 10:45:43 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Mar 1999 22:31:50 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Bekenstein",
"Jacob D.",
""
],
[
"Mayo",
"Avraham E.",
""
]
] | Zaslavskii has suggested how to tighten Bekenstein's bound on entropy when the object is electrically charged. Recently Hod has provided a second tighter version of the bound applicable when the object is rotating. Here we derive Zaslavskii's optimized bound by considering the accretion of an ordinary charged object by... |
0906.2108 | Rong-Jia Yang | Rong-Jia Yang and Shuang Nan Zhang | Modified clock inequalities and modified black hole lifetime | 4pages, 1figure | Phys.Rev.D79:124005,2009 | 10.1103/PhysRevD.79.124005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on a generalized uncertainty principle, Salecker-Wigner inequalities
are modified. When applied to black holes, they give a modified black hole
lifetime: $T_{\rm MB}\sim\frac{M^3}{m^3_{\rm p}}(1-m^2_{\rm p}/M^2)t_{\rm p}$,
and the number of bits required to specify the information content of the black
hole as t... | [
{
"created": "Thu, 11 Jun 2009 14:00:06 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Yang",
"Rong-Jia",
""
],
[
"Zhang",
"Shuang Nan",
""
]
] | Based on a generalized uncertainty principle, Salecker-Wigner inequalities are modified. When applied to black holes, they give a modified black hole lifetime: $T_{\rm MB}\sim\frac{M^3}{m^3_{\rm p}}(1-m^2_{\rm p}/M^2)t_{\rm p}$, and the number of bits required to specify the information content of the black hole as the... |
gr-qc/9707019 | Oleg Borisovich Zaslavskii | O.B.Zaslavskii (Department of Physics, Kharkov State University) | Dilaton black holes in grand canonical ensemble near the extreme state | 8 pages, RevTex 3.0. Presentation improved, discussion on metrics in
string theory simplified. To be published in Phys.Rev.D | Phys.Rev.D56:6695-6697,1997 | 10.1103/PhysRevD.56.6695 | null | gr-qc hep-th | null | Dilaton black holes with a pure electric charge are considered in a framework
of a grand canonical ensemble near the extreme state. It is shown that there
exists such a subset of boundary data that the Hawking temperature smoothly
goes to zero to an infinite value of a horizon radius but the horizon area and
entropy ... | [
{
"created": "Tue, 8 Jul 1997 18:04:05 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Sep 1997 07:44:39 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Zaslavskii",
"O. B.",
"",
"Department of Physics, Kharkov State University"
]
] | Dilaton black holes with a pure electric charge are considered in a framework of a grand canonical ensemble near the extreme state. It is shown that there exists such a subset of boundary data that the Hawking temperature smoothly goes to zero to an infinite value of a horizon radius but the horizon area and entropy ar... |
gr-qc/9710108 | Louis Crane | Louis Crane | On the interpretation of relativistic spin networks and the balanced
state sum | 4 pages latex | null | null | null | gr-qc | null | We discuss the interpretation of the state sum of Barrett and Crane.
| [
{
"created": "Wed, 22 Oct 1997 20:32:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Crane",
"Louis",
""
]
] | We discuss the interpretation of the state sum of Barrett and Crane. |
1403.0681 | Lorenzo Sebastiani | Ratbay Myrzakulov and Lorenzo Sebastiani | Bounce solutions in viscous fluid cosmology | 12 pages, final version, references added, accepted in
Astrophys.Space Sci | Astrophys.Space Sci. 352 (2014) 281-288 | 10.1007/s10509-014-1897-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the bounce cosmology induced by inhomogeneous viscous fluids
in FRW space-time (non necessarly flat), taking into account the early-time
acceleration after the bounce. Different forms for the scale factor and several
examples of fluids will be considered. We also analyze the relation between
bounce and... | [
{
"created": "Tue, 4 Mar 2014 04:38:37 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Mar 2014 12:03:15 GMT",
"version": "v2"
}
] | 2015-09-21 | [
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
]
] | We investigate the bounce cosmology induced by inhomogeneous viscous fluids in FRW space-time (non necessarly flat), taking into account the early-time acceleration after the bounce. Different forms for the scale factor and several examples of fluids will be considered. We also analyze the relation between bounce and f... |
1107.4691 | Aaryn Tonita | Aaryn Tonita | Distributional sources for black hole initial data | Code available at https://github.com/SwampWalker/LeapingMonkey | null | 10.1088/0264-9381/29/1/015001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole initial data is usually produced using Bowen-York type puncture
initial data or by applying an excision boundary condition. The benefits of the
Bowen-York initial data are the ability to specify the spin and momentum of the
system as parameters of the initial data. In an attempt to extend these
benefits to... | [
{
"created": "Sat, 23 Jul 2011 13:58:55 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Tonita",
"Aaryn",
""
]
] | Black hole initial data is usually produced using Bowen-York type puncture initial data or by applying an excision boundary condition. The benefits of the Bowen-York initial data are the ability to specify the spin and momentum of the system as parameters of the initial data. In an attempt to extend these benefits to o... |
gr-qc/0206036 | Hongya Liu | Hongya Liu, Qiuyang Zhang | Time-Dependent Solution for a Star Immersed in a Background Radiation | Latex, 7 pages, no figures, to appear in J. Math. Phys.(2002) | J.Math.Phys. 43 (2002) 4904-4908 | 10.1063/1.1503147 | null | gr-qc | null | We study a time-dependent and spherically-symmetric solution with a star-like
source. We show that this solution can be interpreted as an exterior solution
of a contracting star which has a decreasing temperature and is immersed in a
homogenous and isotropic background radiation. Distribution of the temperature
in th... | [
{
"created": "Thu, 13 Jun 2002 03:56:48 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jun 2002 07:17:35 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Liu",
"Hongya",
""
],
[
"Zhang",
"Qiuyang",
""
]
] | We study a time-dependent and spherically-symmetric solution with a star-like source. We show that this solution can be interpreted as an exterior solution of a contracting star which has a decreasing temperature and is immersed in a homogenous and isotropic background radiation. Distribution of the temperature in the ... |
1106.4304 | Charles Dyer | Alex Venditti and Charles Dyer | Considerations of particle definitions in the functional Schroedinger
formalism | 9 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is often remarked in the literature that particles in QFT on curved
spacetime are akin to coordinates in general relativity and hence are
physically meaningless. This moral is given an explicit demonstration by giving
the correspondence between the coordinates on phase space for a field theory
and the particle num... | [
{
"created": "Tue, 21 Jun 2011 19:54:20 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jun 2011 14:32:53 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Venditti",
"Alex",
""
],
[
"Dyer",
"Charles",
""
]
] | It is often remarked in the literature that particles in QFT on curved spacetime are akin to coordinates in general relativity and hence are physically meaningless. This moral is given an explicit demonstration by giving the correspondence between the coordinates on phase space for a field theory and the particle numbe... |
gr-qc/9507009 | Lior M. Burko | Lior M. Burko and Amos Ori | Remarks on the formation of black holes in non-symmetric gravity | Regular LaTeX, 5 pages, correction of printing errors | null | null | TECHNION-PH-95-18 | gr-qc | null | In a recent paper, we discussed the formation of black holes in non-symmetric
gravity. That paper was then criticized by Cornish and Moffat. In the present
paper, we address the arguments raised by Cornish and Moffat. In summary, we do
not see any reason to doubt the validity of our former conclusions.
| [
{
"created": "Wed, 5 Jul 1995 11:36:21 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Sep 1995 08:21:40 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Burko",
"Lior M.",
""
],
[
"Ori",
"Amos",
""
]
] | In a recent paper, we discussed the formation of black holes in non-symmetric gravity. That paper was then criticized by Cornish and Moffat. In the present paper, we address the arguments raised by Cornish and Moffat. In summary, we do not see any reason to doubt the validity of our former conclusions. |
2312.00474 | Fateme Shojaei Arani | Fateme Shojaei Arani, Malek Bagheri Harouni, Brahim Lamine, Alain
Blanchard | Constraining tensor-to-scalar ratio based on VLBI observations: PGWs
induced-incoherence approach | 50 pags, 9 figures, submitted to JCAP | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we show that the background of primordial gravitational waves
(PGWs) predicted by the inflationary scenario induce a decrease of the spatial
coherence length of an electromagnetic field propagating over cosmological
distances, leading the van Citter-Zernike correlations to eventually be
unobservable, a... | [
{
"created": "Fri, 1 Dec 2023 10:13:49 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Jun 2024 22:42:27 GMT",
"version": "v2"
}
] | 2024-06-11 | [
[
"Arani",
"Fateme Shojaei",
""
],
[
"Harouni",
"Malek Bagheri",
""
],
[
"Lamine",
"Brahim",
""
],
[
"Blanchard",
"Alain",
""
]
] | In this study, we show that the background of primordial gravitational waves (PGWs) predicted by the inflationary scenario induce a decrease of the spatial coherence length of an electromagnetic field propagating over cosmological distances, leading the van Citter-Zernike correlations to eventually be unobservable, an ... |
1105.5301 | Tanwi Bandyopadhyay | Tanwi Bandyopadhyay and Ujjal Debnath | A Study of Generalized Second Law of Thermodynamics in Magnetic Universe
in the light of Non-Linear Electrodynamics | 8 figures | null | 10.1016/j.physletb.2011.08.076 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have considered the magnetic universe in non-linear
electrodynamics. The Einstein's field equations for non-flat FRW model have
been considered when the universe is filled with the matter and magnetic field
only. We have discussed the validity of the generalized second law of
thermodynamics of the ma... | [
{
"created": "Fri, 20 May 2011 16:17:09 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Bandyopadhyay",
"Tanwi",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this work, we have considered the magnetic universe in non-linear electrodynamics. The Einstein's field equations for non-flat FRW model have been considered when the universe is filled with the matter and magnetic field only. We have discussed the validity of the generalized second law of thermodynamics of the magn... |
1101.4303 | Yurii Ignat'ev | Yu.G. Ignat'ev and A.A. Popov | Kinetic equations for ultrarelativistic particles in a Robertson-Walker
Universe and isotropization of relict radiation by gravitational interactions | 19 pages, 2 figures, 13 references | Astrophys.Space Sci.163:153-174,1990 | 10.1007/BF00639984 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kinetic equations for ultrarelativistic particles with due account of
gravitational interactions with massive particles in the Robertson-Walker
universe are obtained. On the basis of an exact solution of the kinetic
equations thus obtained, a conclusion is made as to the high degree of the
uniformity of the relict ra... | [
{
"created": "Sat, 22 Jan 2011 17:36:19 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Jul 2020 18:30:18 GMT",
"version": "v2"
}
] | 2020-07-21 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Popov",
"A. A.",
""
]
] | Kinetic equations for ultrarelativistic particles with due account of gravitational interactions with massive particles in the Robertson-Walker universe are obtained. On the basis of an exact solution of the kinetic equations thus obtained, a conclusion is made as to the high degree of the uniformity of the relict radi... |
1403.7213 | Scott Robertson | Scott Robertson, Ulf Leonhardt | Integral method for the calculation of Hawking radiation in dispersive
media I. Symmetric asymptotics | 33 pages, 7 figures | null | 10.1103/PhysRevE.90.053302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation has become experimentally testable thanks to the many
analogue systems which mimic the effects of the event horizon on wave
propagation. These systems are typically dominated by dispersion, and give rise
to a numerically soluble and stable ODE only if the rest-frame dispersion
relation $\Omega^{2}(k... | [
{
"created": "Thu, 27 Mar 2014 20:59:50 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Robertson",
"Scott",
""
],
[
"Leonhardt",
"Ulf",
""
]
] | Hawking radiation has become experimentally testable thanks to the many analogue systems which mimic the effects of the event horizon on wave propagation. These systems are typically dominated by dispersion, and give rise to a numerically soluble and stable ODE only if the rest-frame dispersion relation $\Omega^{2}(k)$... |
2403.18541 | Haiyuan Feng | Haiyuan Feng, Rong-Jia Yang, Wei-Qiang Chen | Thin accretion disk and shadow of Kerr-Sen black hole in
Einstein-Maxwell-dilaton-axion gravity | 28 pages,17 figures | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the accretion process in a thin disk surrounding a
supermassive black hole in Einstein-Maxwell-dilaton-axion (EMDA) gravity by
using the Novikov-Thorne model. The results reveal that as the dilaton
parameter $r_2$ increase, the energy flux, radiation temperature, spectra
luminosity, and radiative effic... | [
{
"created": "Wed, 27 Mar 2024 13:19:12 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2024 13:37:42 GMT",
"version": "v2"
}
] | 2024-06-17 | [
[
"Feng",
"Haiyuan",
""
],
[
"Yang",
"Rong-Jia",
""
],
[
"Chen",
"Wei-Qiang",
""
]
] | We investigate the accretion process in a thin disk surrounding a supermassive black hole in Einstein-Maxwell-dilaton-axion (EMDA) gravity by using the Novikov-Thorne model. The results reveal that as the dilaton parameter $r_2$ increase, the energy flux, radiation temperature, spectra luminosity, and radiative efficie... |
2303.10719 | Yen Chin Ong | Yen Chin Ong | A Critique on Some Aspects of GUP Effective Metric | null | Eur. Phys. J. C 83 (2023) 209 | 10.1140/epjc/s10052-023-11360-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generalized uncertainty principle (GUP) is a gravitational correction of
Heisenberg's uncertainty principle, which allows us to probe some features of
quantum gravity even without the full theory. We are used to working with
metric tensors in general relativity; they are convenient to have available
when we wish ... | [
{
"created": "Sun, 19 Mar 2023 17:29:37 GMT",
"version": "v1"
}
] | 2023-03-21 | [
[
"Ong",
"Yen Chin",
""
]
] | The generalized uncertainty principle (GUP) is a gravitational correction of Heisenberg's uncertainty principle, which allows us to probe some features of quantum gravity even without the full theory. We are used to working with metric tensors in general relativity; they are convenient to have available when we wish to... |
gr-qc/0504013 | Mukund Rangamani | Veronika E. Hubeny, Mukund Rangamani, Simon F. Ross | Causally pathological spacetimes are physically relevant | Latex, 5 pages, 1 figure. Submitted for GRF essay competition | Int.J.Mod.Phys.D14:2227-2232,2005 | 10.1142/S0218271805007760 | null | gr-qc hep-th | null | We argue that in the context of string theory, the usual restriction to
globally hyperbolic spacetimes should be considerably relaxed. We exhibit an
example of a spacetime which only satisfies the causal condition, and so is
arbitrarily close to admitting closed causal curves, but which has a
well-behaved dual descri... | [
{
"created": "Mon, 4 Apr 2005 20:14:18 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Hubeny",
"Veronika E.",
""
],
[
"Rangamani",
"Mukund",
""
],
[
"Ross",
"Simon F.",
""
]
] | We argue that in the context of string theory, the usual restriction to globally hyperbolic spacetimes should be considerably relaxed. We exhibit an example of a spacetime which only satisfies the causal condition, and so is arbitrarily close to admitting closed causal curves, but which has a well-behaved dual descript... |
2001.06153 | Jibril Ben Achour | Jibril Ben Achour, Jean-Philippe Uzan | Bouncing compact objects. Part II: Effective theory of a pulsating
Planck star | 30 pages, 7 figures, notation changed, clarifications added in
Appendix, published version in PRD | Phys. Rev. D 102, 124041 (2020) | 10.1103/PhysRevD.102.124041 | YITP-20-51 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents an effective quantum extension of the seminal
Oppenheimer-Snyder (OS) collapse in which the singularity resolution is modeled
using the effective dynamics of the spatially closed loop quantum cosmology.
Imposing the minimal junction conditions, namely the Israel-Darmois conditions,
we glue this ... | [
{
"created": "Fri, 17 Jan 2020 04:11:14 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Feb 2020 01:23:16 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Apr 2020 14:29:01 GMT",
"version": "v3"
},
{
"created": "Wed, 2 Dec 2020 17:24:14 GMT",
"version": "v4"
}
] | 2021-01-04 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | This article presents an effective quantum extension of the seminal Oppenheimer-Snyder (OS) collapse in which the singularity resolution is modeled using the effective dynamics of the spatially closed loop quantum cosmology. Imposing the minimal junction conditions, namely the Israel-Darmois conditions, we glue this bo... |
1906.05693 | Salvatore Capozziello | Salvatore Capozziello, Carlo Alberto Mantica, and Luca Guido Molinari | Cosmological perfect fluids in Gauss-Bonnet gravity | 8 pages, accepted for publication in International Journal of
Geometric Methods in Modern Physics | null | 10.1142/S0219887819501330 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an $n$-dimensional Friedmann-Robertson-Walker metric, it is rigorously
shown that any analytical theory of gravity $f(R,{\cal G})$, where $R$ is the
curvature scalar and $\cal G$ is the Gauss-Bonnet topological invariant, can be
associated to a perfect-fluid stress-energy tensor. In this perspective, dark
componen... | [
{
"created": "Thu, 13 Jun 2019 13:54:19 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Jun 2019 09:28:28 GMT",
"version": "v2"
}
] | 2019-10-02 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Mantica",
"Carlo Alberto",
""
],
[
"Molinari",
"Luca Guido",
""
]
] | In an $n$-dimensional Friedmann-Robertson-Walker metric, it is rigorously shown that any analytical theory of gravity $f(R,{\cal G})$, where $R$ is the curvature scalar and $\cal G$ is the Gauss-Bonnet topological invariant, can be associated to a perfect-fluid stress-energy tensor. In this perspective, dark components... |
1508.03036 | Saeed Rastgoo | Alejandro Corichi, Asieh Karami, Saeed Rastgoo, Tatjana Vuka\v{s}inac | Constraint Lie algebra and local physical Hamiltonian for a generic 2D
dilatonic model | 24 pages, 3 appendices. A few small changes applied to the text,
including the addition of important new comments about rescalings on the
Killing horizon. 3 new references added | Class. Quantum Grav. 33 (2016) 035011 | 10.1088/0264-9381/33/3/035011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a class of two dimensional dilatonic models, and revisit them
from the perspective of a new set of "polar type" variables. These are
motivated by recently defined variables within the spherically symmetric sector
of 4D general relativity. We show that for a large class of dilatonic models,
including the c... | [
{
"created": "Wed, 12 Aug 2015 19:49:40 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2015 01:15:02 GMT",
"version": "v2"
}
] | 2016-01-14 | [
[
"Corichi",
"Alejandro",
""
],
[
"Karami",
"Asieh",
""
],
[
"Rastgoo",
"Saeed",
""
],
[
"Vukašinac",
"Tatjana",
""
]
] | We consider a class of two dimensional dilatonic models, and revisit them from the perspective of a new set of "polar type" variables. These are motivated by recently defined variables within the spherically symmetric sector of 4D general relativity. We show that for a large class of dilatonic models, including the cas... |
2008.09114 | Seyed Hossein Hendi Dr. | S. H. Hendi, F. Azari, E. Rahimi, M. Elahi, Z. Owjifard and Z.
Armanfard | Thermodynamics and and phase transition of topological dilatonic
Lifshitz-like black holes | 13 pages with 8 captioned figures. Accepted for publication in AdP | null | 10.1002/andp.202000162 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that scalar-tensor gravity models can be studied in Einstein and
Jordan frames. In this paper, we consider a model of scalar-tensor gravity in
Einstein's frame to calculate the Lifshitz-like black hole solutions with
different horizon topologies. We study thermodynamic properties and first order
van der W... | [
{
"created": "Thu, 20 Aug 2020 05:38:09 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Hendi",
"S. H.",
""
],
[
"Azari",
"F.",
""
],
[
"Rahimi",
"E.",
""
],
[
"Elahi",
"M.",
""
],
[
"Owjifard",
"Z.",
""
],
[
"Armanfard",
"Z.",
""
]
] | It is known that scalar-tensor gravity models can be studied in Einstein and Jordan frames. In this paper, we consider a model of scalar-tensor gravity in Einstein's frame to calculate the Lifshitz-like black hole solutions with different horizon topologies. We study thermodynamic properties and first order van der Waa... |
gr-qc/0405063 | Leonardo Gualtieri | L.Gualtieri, J.A.Pons, G.Miniutti | Non-adiabatic oscillations of compact stars in general relativity | 22 pages, 4 figures, minor changes to match version accepted by Phys.
Rev. D | Phys.Rev. D70 (2004) 084009 | 10.1103/PhysRevD.70.084009 | null | gr-qc astro-ph | null | We have developed a formalism to study non-adiabatic, non-radial oscillations
of non-rotating compact stars in the frequency domain, including the effects of
thermal diffusion in the framework of general relativistic perturbation theory.
When a general equation of state depending on temperature is used, the
perturbat... | [
{
"created": "Wed, 12 May 2004 13:19:07 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 2004 19:08:39 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Gualtieri",
"L.",
""
],
[
"Pons",
"J. A.",
""
],
[
"Miniutti",
"G.",
""
]
] | We have developed a formalism to study non-adiabatic, non-radial oscillations of non-rotating compact stars in the frequency domain, including the effects of thermal diffusion in the framework of general relativistic perturbation theory. When a general equation of state depending on temperature is used, the perturbatio... |
1405.3693 | Bela Szilagyi | Bela Szilagyi | Key Elements of Robustness in Binary Black Hole Evolutions using
Spectral Methods | 39 pages, 16 figures, invited review paper | International Journal of Modern Physics D, Vol. 23, No. 6 (2014)
1430014 (38 pages) | 10.1142/S0218271814300146 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As a network of advanced-era gravitational wave detectors is nearing its
design sensitivity, efficient and accurate waveform modeling becomes more and
more relevant. Understanding of the nature of the signal being sought can have
an order unity effect on the event rates seen in these instruments. The paper
provides a... | [
{
"created": "Wed, 14 May 2014 21:31:59 GMT",
"version": "v1"
}
] | 2014-05-16 | [
[
"Szilagyi",
"Bela",
""
]
] | As a network of advanced-era gravitational wave detectors is nearing its design sensitivity, efficient and accurate waveform modeling becomes more and more relevant. Understanding of the nature of the signal being sought can have an order unity effect on the event rates seen in these instruments. The paper provides a d... |
1301.4680 | Clifford M. Will | Saeed Mirshekari and Clifford M. Will | Compact binary systems in scalar-tensor gravity: Equations of motion to
2.5 post-Newtonian order | 32 pages, closely matches version published in Phys. Rev. D | Phys. Rev. D 87, 084070 (2013) | 10.1103/PhysRevD.87.084070 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the explicit equations of motion for non-spinning compact
objects to 2.5 post-Newtonian order, or O(v/c)^5 beyond Newtonian gravity, in a
general class of scalar-tensor theories of gravity. We use the formalism of the
Direct Integration of the Relaxed Einstein Equations (DIRE), adapted to
scalar-tensor t... | [
{
"created": "Sun, 20 Jan 2013 20:02:38 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jan 2013 13:05:11 GMT",
"version": "v2"
},
{
"created": "Sun, 12 May 2013 19:05:47 GMT",
"version": "v3"
}
] | 2013-05-14 | [
[
"Mirshekari",
"Saeed",
""
],
[
"Will",
"Clifford M.",
""
]
] | We calculate the explicit equations of motion for non-spinning compact objects to 2.5 post-Newtonian order, or O(v/c)^5 beyond Newtonian gravity, in a general class of scalar-tensor theories of gravity. We use the formalism of the Direct Integration of the Relaxed Einstein Equations (DIRE), adapted to scalar-tensor the... |
gr-qc/0208048 | Alessandra Buonanno | Alessandra Buonanno and Yanbei Chen | Scaling law in signal recycled laser-interferometer gravitational-wave
detectors | 23 pages | Phys.Rev. D67 (2003) 062002 | 10.1103/PhysRevD.67.062002 | null | gr-qc | null | By mapping the signal-recycling (SR) optical configuration to a three-mirror
cavity, and then to a single detuned cavity, we express SR optomechanical
dynamics, input--output relation and noise spectral density in terms of only
three characteristic parameters: the (free) optical resonant frequency and
decay time of t... | [
{
"created": "Sun, 18 Aug 2002 02:04:49 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Buonanno",
"Alessandra",
""
],
[
"Chen",
"Yanbei",
""
]
] | By mapping the signal-recycling (SR) optical configuration to a three-mirror cavity, and then to a single detuned cavity, we express SR optomechanical dynamics, input--output relation and noise spectral density in terms of only three characteristic parameters: the (free) optical resonant frequency and decay time of the... |
gr-qc/9508015 | Donald Marolf | Donald Marolf | Refined Algebraic Quantization: Systems with a single constraint | 13 pages plain Tex, techincal errors corrected (e.g., continuous
replaced by smooth in Property A) | null | null | UCSBTH-95-16 | gr-qc | null | This paper explores in some detail a recent proposal (the Rieffel
induction/refined algebraic quantization scheme) for the quantization of
constrained gauge systems. Below, the focus is on systems with a single
constraint and, in this context, on the uniqueness of the construction. While
in general the results depend... | [
{
"created": "Mon, 7 Aug 1995 19:00:50 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Dec 1996 18:38:53 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Feb 1999 18:20:42 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Marolf",
"Donald",
""
]
] | This paper explores in some detail a recent proposal (the Rieffel induction/refined algebraic quantization scheme) for the quantization of constrained gauge systems. Below, the focus is on systems with a single constraint and, in this context, on the uniqueness of the construction. While in general the results depend h... |
0806.1583 | Brihaye Yves | Y. Brihaye, T. Delsate | Charged-Rotating Black Holes in Higher-dimensional (A)DS-Gravity | 20 pages, 12 figures, results extended, references added | Phys.Rev.D79:105013,2009 | 10.1103/PhysRevD.79.105013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present numerical evidences for the existence of rotating black hole
solutions in d-dimensional Einstein-Maxwell theory with a cosmological constant
and for $d$ odd. The metric used possesses $(d+1)/2$ Killing vectors and the
solutions have $(d-1)/2$ equal angular momenta. A Schwarschild-type coordinate
is used fo... | [
{
"created": "Tue, 10 Jun 2008 06:40:23 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Nov 2008 15:53:04 GMT",
"version": "v2"
}
] | 2009-07-30 | [
[
"Brihaye",
"Y.",
""
],
[
"Delsate",
"T.",
""
]
] | We present numerical evidences for the existence of rotating black hole solutions in d-dimensional Einstein-Maxwell theory with a cosmological constant and for $d$ odd. The metric used possesses $(d+1)/2$ Killing vectors and the solutions have $(d-1)/2$ equal angular momenta. A Schwarschild-type coordinate is used for ... |
1003.3399 | Muhammad Farooq Dr. | M.Umar Farooq, Muneer A. Rashid and Mubasher Jamil | Interacting entropy-corrected holographic Chaplygin gas model | 16 pages, typos fixed | Int. J. Theor. Phys.49:2334-2347, 2010 | 10.1007/s10773-010-0420-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Holographic dark energy (HDE), presents a dynamical view of dark energy which
is consistent with the observational data and has a solid theoretical
background. Its definition follows from the entropy-area relation $S(A)$, where
$S$ and $A$ are entropy and area respectively. In the framework of loop quantum
gravity, a... | [
{
"created": "Wed, 17 Mar 2010 15:50:04 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Apr 2010 07:42:14 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Farooq",
"M. Umar",
""
],
[
"Rashid",
"Muneer A.",
""
],
[
"Jamil",
"Mubasher",
""
]
] | Holographic dark energy (HDE), presents a dynamical view of dark energy which is consistent with the observational data and has a solid theoretical background. Its definition follows from the entropy-area relation $S(A)$, where $S$ and $A$ are entropy and area respectively. In the framework of loop quantum gravity, a m... |
2305.09599 | Rita Neves | Mercedes Mart\'in-Benito, Rita B. Neves, Javier Olmedo | Alleviation of anomalies from the non-oscillatory vacuum in loop quantum
cosmology | 20 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we investigate observational signatures of a primordial power
spectrum with exponential infrared suppression, motivated by the choice of a
non-oscillatory vacuum in a bouncing and inflationary geometry within Loop
Quantum Cosmology (LQC). We leave the parameter that defines the scale at which
suppression... | [
{
"created": "Tue, 16 May 2023 16:52:14 GMT",
"version": "v1"
}
] | 2023-05-17 | [
[
"Martín-Benito",
"Mercedes",
""
],
[
"Neves",
"Rita B.",
""
],
[
"Olmedo",
"Javier",
""
]
] | In this work we investigate observational signatures of a primordial power spectrum with exponential infrared suppression, motivated by the choice of a non-oscillatory vacuum in a bouncing and inflationary geometry within Loop Quantum Cosmology (LQC). We leave the parameter that defines the scale at which suppression o... |
1312.2385 | Bijan Saha Dr. | Victor Rikhvitsky, Bijan Saha, Mihai Visinescu | Magnetic Bianchi type II string cosmological model in loop quantum
cosmology | 11 pages, 9 figures | Astrophys. Space Sci. 352 (2014) 255 - 261 | 10.1007/s10509-014-1890-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The loop quantum cosmology of the Bianchi type II string cosmological model
in the presence of a homogeneous magnetic field is studied. We present the
effective equations which provide modifications to the classical equations of
motion due to quantum effects. The numerical simulations confirm that the big
bang singul... | [
{
"created": "Mon, 9 Dec 2013 11:15:51 GMT",
"version": "v1"
}
] | 2015-05-01 | [
[
"Rikhvitsky",
"Victor",
""
],
[
"Saha",
"Bijan",
""
],
[
"Visinescu",
"Mihai",
""
]
] | The loop quantum cosmology of the Bianchi type II string cosmological model in the presence of a homogeneous magnetic field is studied. We present the effective equations which provide modifications to the classical equations of motion due to quantum effects. The numerical simulations confirm that the big bang singular... |
gr-qc/9806118 | Gungwon Kang | Jeongwon Ho and Gungwon Kang | Superradiance and the Statistical-Mechanical Entropy of Rotating BTZ
Black Holes | 13 pages, plain latex, no figure, version published in Phys. Lett. B,
Emphasis is given on the quantization of superradiance modes | Phys.Lett.B445:27-35,1998 | 10.1016/S0370-2693(98)01451-8 | SOGANG-HEP-239/98 | gr-qc hep-th | null | We have considered the divergence structure in the brick-wall model for the
statistical mechanical entropy of a quantum field in thermal equilibrium with a
black hole which {\it rotates}. Especially, the contribution to entropy from
superradiant modes is carefully incorporated, leading to a result for this
contributi... | [
{
"created": "Tue, 30 Jun 1998 15:05:21 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Feb 1999 10:06:18 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Ho",
"Jeongwon",
""
],
[
"Kang",
"Gungwon",
""
]
] | We have considered the divergence structure in the brick-wall model for the statistical mechanical entropy of a quantum field in thermal equilibrium with a black hole which {\it rotates}. Especially, the contribution to entropy from superradiant modes is carefully incorporated, leading to a result for this contribution... |
1409.6974 | Giampiero Esposito Dr. | Enrico Calloni, S Caprara, Martina De Laurentis, Giampiero Esposito, M
Grilli, Ettore Majorana, G P Pepe, S Petrarca, P Puppo, F Ricci, Luigi Rosa,
Carlo Rovelli, P Ruggi, N L Saini, Cosimo Stornaiolo, Francesco Tafuri | The Archimedes project: a feasibility study for weighing the vacuum
energy | 10 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Archimedes is a feasibility study to a future experiment to ascertain the
interaction of vacuum fluctuations with gravity. The future experiment should
measure the force that the Earth's gravitational field exerts on a Casimir
cavity by using a balance as the small force detector. The Archimedes
experiment analyses t... | [
{
"created": "Wed, 24 Sep 2014 14:42:52 GMT",
"version": "v1"
}
] | 2014-09-25 | [
[
"Calloni",
"Enrico",
""
],
[
"Caprara",
"S",
""
],
[
"De Laurentis",
"Martina",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Grilli",
"M",
""
],
[
"Majorana",
"Ettore",
""
],
[
"Pepe",
"G P",
""
],
[
"... | Archimedes is a feasibility study to a future experiment to ascertain the interaction of vacuum fluctuations with gravity. The future experiment should measure the force that the Earth's gravitational field exerts on a Casimir cavity by using a balance as the small force detector. The Archimedes experiment analyses the... |
1512.01900 | Anzhong Wang | Chikun Ding, Anzhong Wang, Xinwen Wang, and Tao Zhu | Hawking radiation of charged Einstein-aether black holes at both Killing
and universal horizons | revtex4, no figures and tables. Nucl. Phys. B913 (2016) 694-715 | Nucl. Phys. B913 (2016) 694 - 715 | 10.1016/j.nuclphysb.2016.10.007 | null | gr-qc astro-ph.GA hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study analytically quantum tunneling of relativistic and non-relativistic
particles at both Killing and universal horizons of Einstein-Maxwell-aether
black holes, after high-order curvature corrections are taken into account, for
which the dispersion relation of the particles becomes nonlinear. Our results
at the ... | [
{
"created": "Mon, 7 Dec 2015 03:23:58 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2016 07:50:17 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Sep 2016 04:37:03 GMT",
"version": "v3"
},
{
"created": "Mon, 10 Oct 2016 04:54:36 GMT",
"version": "v4"
},
{
"cr... | 2016-11-23 | [
[
"Ding",
"Chikun",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Wang",
"Xinwen",
""
],
[
"Zhu",
"Tao",
""
]
] | We study analytically quantum tunneling of relativistic and non-relativistic particles at both Killing and universal horizons of Einstein-Maxwell-aether black holes, after high-order curvature corrections are taken into account, for which the dispersion relation of the particles becomes nonlinear. Our results at the Ki... |
gr-qc/0210098 | Patrice Hello | Nicolas Arnaud, Matteo Barsuglia, Marie-Anne Bizouard, Violette
Brisson, Fabien Cavalier, Michel Davier, Patrice Hello, Stephane
Kreckelbergh, Edward K. Porter and Thierry Pradier | Comparison of filters for detecting gravitational wave bursts in
interferometric detectors | 32 pages (14 figures), accepted for publication in Phys. Rev. D | Phys.Rev.D67:062004,2003 | 10.1103/PhysRevD.67.062004 | null | gr-qc | null | Filters developed in order to detect short bursts of gravitational waves in
interferometric detector outputs are compared according to three main points.
Conventional Receiver Operating Characteristics (ROC) are first built for all
the considered filters and for three typical burst signals. Optimized ROC are
shown fo... | [
{
"created": "Tue, 29 Oct 2002 08:58:46 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2003 09:14:00 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Arnaud",
"Nicolas",
""
],
[
"Barsuglia",
"Matteo",
""
],
[
"Bizouard",
"Marie-Anne",
""
],
[
"Brisson",
"Violette",
""
],
[
"Cavalier",
"Fabien",
""
],
[
"Davier",
"Michel",
""
],
[
"Hello",
"Patrice",
""
... | Filters developed in order to detect short bursts of gravitational waves in interferometric detector outputs are compared according to three main points. Conventional Receiver Operating Characteristics (ROC) are first built for all the considered filters and for three typical burst signals. Optimized ROC are shown for ... |
1907.02965 | Gopi Kant Goswami Dr | G. K. Goswami, Anirudh Pradhan, Meena Mishra and A. Beesham | FRW dark energy cosmological model with hybrid expansion law | 15 pages, 8 figures | New Astronomy, Vol. 73, Issue Nov (2019), 101284(9 pages) | 10.1016/j.newast.2019.101284 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study a cosmological model of spatially homogeneous and
isotropic accelerating universe which exhibits a transition from deceleration
to acceleration. For this, Friedmann Robertson Walker(FRW) metric is taken and
Hybrid expansion law $a(t)=t^{\alpha} \exp(\beta t )$ is proposed and derived.
We consid... | [
{
"created": "Mon, 8 Jul 2019 07:45:00 GMT",
"version": "v1"
}
] | 2021-08-02 | [
[
"Goswami",
"G. K.",
""
],
[
"Pradhan",
"Anirudh",
""
],
[
"Mishra",
"Meena",
""
],
[
"Beesham",
"A.",
""
]
] | In this work, we study a cosmological model of spatially homogeneous and isotropic accelerating universe which exhibits a transition from deceleration to acceleration. For this, Friedmann Robertson Walker(FRW) metric is taken and Hybrid expansion law $a(t)=t^{\alpha} \exp(\beta t )$ is proposed and derived. We consider... |
1201.3684 | Michele Vallisneri | Michele Vallisneri and Chad R. Galley | Non-sky-averaged sensitivity curves for space-based gravitational-wave
observatories | 25 pages, 7 PDF figures. Final journal version. Mathematica code at
http://www.vallis.org/publications/sensitivity | Michele Vallisneri and Chad R Galley 2012 Class. Quantum Grav. 29
124015 | 10.1088/0264-9381/29/12/124015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | (abridged) The signal-to-noise ratio (SNR) is used in gravitational-wave
observations as the basic figure of merit for detection confidence and,
together with the Fisher matrix, for the amount of physical information that
can be extracted from a detected signal. SNRs are usually computed from a
sensitivity curve, whi... | [
{
"created": "Wed, 18 Jan 2012 02:24:43 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Sep 2012 20:35:14 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Vallisneri",
"Michele",
""
],
[
"Galley",
"Chad R.",
""
]
] | (abridged) The signal-to-noise ratio (SNR) is used in gravitational-wave observations as the basic figure of merit for detection confidence and, together with the Fisher matrix, for the amount of physical information that can be extracted from a detected signal. SNRs are usually computed from a sensitivity curve, which... |
1008.0747 | Carles Bona | C.Bona, C.Bona-Casas and C.Palenzuela | Action principle for Numerical Relativity evolution systems | Revised version, includes explicit expresions for gauge sources
corresponding to 1+log and gamma-driver gauge conditions ('punctures' gauge) | Phys.Rev.D82:124010,2010 | 10.1103/PhysRevD.82.124010 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Lagrangian density is provided, that allows to recover the Z4 evolution
system from an action principle. The resulting system is then strongly
hyperbolic when supplemented by gauge conditions like '1+log' or 'freezing
shift', suitable for numerical evolution. The physical constraint $Z_\mu = 0$
can be imposed just ... | [
{
"created": "Wed, 4 Aug 2010 11:16:19 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Nov 2010 13:15:14 GMT",
"version": "v2"
}
] | 2010-12-24 | [
[
"Bona",
"C.",
""
],
[
"Bona-Casas",
"C.",
""
],
[
"Palenzuela",
"C.",
""
]
] | A Lagrangian density is provided, that allows to recover the Z4 evolution system from an action principle. The resulting system is then strongly hyperbolic when supplemented by gauge conditions like '1+log' or 'freezing shift', suitable for numerical evolution. The physical constraint $Z_\mu = 0$ can be imposed just on... |
1302.5989 | Valentina Baccetti | Valentina Baccetti (Victoria University of Wellington), Kyle Tate
(Victoria University of Wellington), and Matt Visser (Victoria University of
Wellington) | Inertial frames without the relativity principle: breaking Lorentz
symmetry | 3 pages; contribution to the proceedings of the Thirteenth Marcel
Grossmann Meeting, Stockholm University, Sweden, 1-7 July, 2012 | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate inertial frames in the absence of Lorentz invariance,
reconsidering the usual group structure implied by the relativity principle. We
abandon the relativity principle, discarding the group structure for the
transformations between inertial frames, while requiring these transformations
to be at least li... | [
{
"created": "Mon, 25 Feb 2013 03:37:41 GMT",
"version": "v1"
}
] | 2013-02-26 | [
[
"Baccetti",
"Valentina",
"",
"Victoria University of Wellington"
],
[
"Tate",
"Kyle",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | We investigate inertial frames in the absence of Lorentz invariance, reconsidering the usual group structure implied by the relativity principle. We abandon the relativity principle, discarding the group structure for the transformations between inertial frames, while requiring these transformations to be at least line... |
gr-qc/9911055 | Jonathan R. Ellis | J. Ellis (CERN), N.E. Mavromatos (King's College London), D.V.
Nanopoulos (Texas A&M, HARC, Academy of Athens) and G. Volkov (IHEP,
Protvino) | Gravitational-Recoil Effects on Fermion Propagation in Space-Time Foam | 18 pages LaTeX | Gen.Rel.Grav.32:1777-1798,2000 | 10.1023/A:1001980530113 | ACT-11/99,CERN-TH/99-346,CTP-TAMU-44/99 | gr-qc astro-ph hep-ph hep-th | null | Motivated by the possible experimental opportunities to test quantum gravity
via its effects on high-energy neutrinos propagating through space-time foam,
we discuss how to incorporate spin structures in our D-brane description of
gravitational recoil effects in vacuo. We also point to an interesting
analogous conden... | [
{
"created": "Mon, 15 Nov 1999 18:10:53 GMT",
"version": "v1"
}
] | 2009-09-11 | [
[
"Ellis",
"J.",
"",
"CERN"
],
[
"Mavromatos",
"N. E.",
"",
"King's College London"
],
[
"Nanopoulos",
"D. V.",
"",
"Texas A&M, HARC, Academy of Athens"
],
[
"Volkov",
"G.",
"",
"IHEP,\n Protvino"
]
] | Motivated by the possible experimental opportunities to test quantum gravity via its effects on high-energy neutrinos propagating through space-time foam, we discuss how to incorporate spin structures in our D-brane description of gravitational recoil effects in vacuo. We also point to an interesting analogous condense... |
0903.3899 | Juan A. Valiente-Kroon | C. L\"ubbe and J. A. Valiente Kroon | On de Sitter-like and Minkowski-like space-times | 24 pages, typos corrected to match published version in CQG | Class.Quant.Grav.26:145012,2009 | 10.1088/0264-9381/26/14/145012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Friedrich's proofs for the global existence results of de Sitter-like
space-times and of semi-global existence of Minkowski-like space-times [Comm.
Math. Phys. \textbf{107}, 587 (1986)] are re-examined and discussed, making use
of the extended conformal field equations and a gauge based on conformal
geodesics. In thi... | [
{
"created": "Mon, 23 Mar 2009 16:39:46 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jul 2009 08:52:21 GMT",
"version": "v2"
}
] | 2009-07-24 | [
[
"Lübbe",
"C.",
""
],
[
"Kroon",
"J. A. Valiente",
""
]
] | Friedrich's proofs for the global existence results of de Sitter-like space-times and of semi-global existence of Minkowski-like space-times [Comm. Math. Phys. \textbf{107}, 587 (1986)] are re-examined and discussed, making use of the extended conformal field equations and a gauge based on conformal geodesics. In this ... |
1710.07720 | R. Michael Jones | R. Michael Jones | The rotation problem | Published version includes the effects of inflation. Corrected
version of Table 4 at http://cires.colorado.edu/~mjones/physics/Table4.pdf
shows which rows in the table are affected by inflation. Reference [52] url
in published version should be arXiv.org/abs/1710.07720v1 | General Relativity and Gravitation, volume 52, issue 5, article
45, 2020 | 10.1007/s10714-020-02696-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Any reasonable form of quantum gravity can explain (by phase interference)
why on a large scale, inertial frames seem not to rotate relative to the
average matter distribution in the universe without the need for absolute
space, finely tuned initial conditions, or without giving up independent
degrees of freedom for ... | [
{
"created": "Fri, 20 Oct 2017 22:36:23 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Oct 2019 20:37:12 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Jan 2020 00:21:50 GMT",
"version": "v3"
},
{
"created": "Sat, 16 May 2020 15:02:11 GMT",
"version": "v4"
}
] | 2020-05-19 | [
[
"Jones",
"R. Michael",
""
]
] | Any reasonable form of quantum gravity can explain (by phase interference) why on a large scale, inertial frames seem not to rotate relative to the average matter distribution in the universe without the need for absolute space, finely tuned initial conditions, or without giving up independent degrees of freedom for th... |
gr-qc/0012091 | Martin Tajmar | C.J. de Matos, M. Tajmar | Gravitomagnetic Barnett Effect | 10 pages, 1 figure | Indian J.Phys. B75 (2001) 459-461 | null | null | gr-qc | null | Using the linearized theory of general relativity, the gravitomagnetic
analogue of the Barnett effect is derived. Further theoretical and experimental
investigation is recommended, due to the expected macroscopic values of the
gravitomagnetic field involved in this effect, and to the constraints which
would appear on... | [
{
"created": "Fri, 22 Dec 2000 08:15:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Matos",
"C. J.",
""
],
[
"Tajmar",
"M.",
""
]
] | Using the linearized theory of general relativity, the gravitomagnetic analogue of the Barnett effect is derived. Further theoretical and experimental investigation is recommended, due to the expected macroscopic values of the gravitomagnetic field involved in this effect, and to the constraints which would appear on q... |
gr-qc/0312062 | Hans-Thomas Elze | Hans-Thomas Elze | Quantum features in statistical observations of "timeless" classical
systems | 7 pages. Invited talk at Int. Workshop Trends and Perspectives on
Extensive and Non-Extensive Statistical Mechanics, Angra dos Reis (Brazil),
Nov. 2003. To appear in Physica A | Physica A344:478-483,2004 | 10.1016/j.physa.2004.06.017 | null | gr-qc quant-ph | null | We pursue the view that quantum theory may be an emergent structure related
to large space-time scales. In particular, we consider classical Hamiltonian
systems in which the intrinsic proper time evolution parameter is related
through a probability distribution to the discrete physical time. This is
motivated by stud... | [
{
"created": "Thu, 11 Dec 2003 14:05:02 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Elze",
"Hans-Thomas",
""
]
] | We pursue the view that quantum theory may be an emergent structure related to large space-time scales. In particular, we consider classical Hamiltonian systems in which the intrinsic proper time evolution parameter is related through a probability distribution to the discrete physical time. This is motivated by studie... |
1701.05745 | Shubhrangshu Ghosh | Shubhrangshu Ghosh, Tamal Sarkar, Arunava Bhadra | Exact relativistic Newtonian representation of gravitational static
spacetime geometries | 6 pages, 1 table | Astrophys.J, 828, 6 (2016) | 10.3847/0004-637X/828/1/6 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a self-consistent relativistic Newtonian analogue corresponding
to gravitational static spherical symmetric spacetime geometries, staring
directly from a generalized scalar relativistic gravitational action in
Newtonian framework, which gives geodesic equations of motion identical to
those of the parent ... | [
{
"created": "Fri, 20 Jan 2017 10:15:19 GMT",
"version": "v1"
}
] | 2017-01-25 | [
[
"Ghosh",
"Shubhrangshu",
""
],
[
"Sarkar",
"Tamal",
""
],
[
"Bhadra",
"Arunava",
""
]
] | We construct a self-consistent relativistic Newtonian analogue corresponding to gravitational static spherical symmetric spacetime geometries, staring directly from a generalized scalar relativistic gravitational action in Newtonian framework, which gives geodesic equations of motion identical to those of the parent me... |
1912.09182 | Tatyana P. Shestakova | T. P. Shestakova | Wave function of the Universe, path integrals and gauge invariance | 12 pages, the paper was written for the hundredth issue of the
journal "Gravitation & Cosmology" | Grav. Cosmol. 25 (2019) 289-296 | 10.1134/S0202289319040121 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper is devoted to some of the difficulties which the Wheeler - DeWitt
quantum geometrodynamics encountered, in particular, a strong mathematical
proof that this theory is gauge-invariant, the definition of the wave function
of the Universe through a path integral and the illegality of asymptotic
boundary condit... | [
{
"created": "Thu, 19 Dec 2019 13:21:49 GMT",
"version": "v1"
}
] | 2019-12-20 | [
[
"Shestakova",
"T. P.",
""
]
] | The paper is devoted to some of the difficulties which the Wheeler - DeWitt quantum geometrodynamics encountered, in particular, a strong mathematical proof that this theory is gauge-invariant, the definition of the wave function of the Universe through a path integral and the illegality of asymptotic boundary conditio... |
gr-qc/0409029 | Mitsuo J. Hayashi | Tomoki Watanabe and Mitsuo J. Hayashi | General Relativity with Torsion | 14pages, no figures | null | null | TOKAI-HEP/TH-04-09 | gr-qc | null | General Relativity with nonvanishing torsion has been investigated in the
first order formalism of Poincare gauge field theory. In the presence of
torsion, either side of the Einstein equation has the nonvanishing covariant
divergence. This fact turned out to be self-consistent in the framework under
consideration. B... | [
{
"created": "Tue, 7 Sep 2004 06:00:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Watanabe",
"Tomoki",
""
],
[
"Hayashi",
"Mitsuo J.",
""
]
] | General Relativity with nonvanishing torsion has been investigated in the first order formalism of Poincare gauge field theory. In the presence of torsion, either side of the Einstein equation has the nonvanishing covariant divergence. This fact turned out to be self-consistent in the framework under consideration. By ... |
2301.08319 | Khaled Saaidi | Z. Ossoulian, Kh. Saaidi, S. Taghavi, T. Golanbari | Inflation in $f(R,T)$ gravity with observational constraints | 21 pages, 5 figures, 4 tables, typos corrected, References added,
Submitted version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scenario of slow-roll inflation is explored in the $f(R,T)$ theory of
gravity where a non-minimal coupling between matter and curvature is included.
A noncanonical scalar field is assumed to play the role of inflaton which
contains generalized kinetic energy. The study is performed by taking the
Hamilton-Jacobi f... | [
{
"created": "Wed, 18 Jan 2023 14:59:11 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2023 07:35:22 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Feb 2023 12:04:09 GMT",
"version": "v3"
}
] | 2023-02-23 | [
[
"Ossoulian",
"Z.",
""
],
[
"Saaidi",
"Kh.",
""
],
[
"Taghavi",
"S.",
""
],
[
"Golanbari",
"T.",
""
]
] | The scenario of slow-roll inflation is explored in the $f(R,T)$ theory of gravity where a non-minimal coupling between matter and curvature is included. A noncanonical scalar field is assumed to play the role of inflaton which contains generalized kinetic energy. The study is performed by taking the Hamilton-Jacobi for... |
0704.3760 | Mamdouh Wanas | M.I.Wanas | An Alternative Source for Dark Energy | 3 pages, LaTeX file, summary of a talk delivered at MG XI, held in
Berlin, July 2006 | null | 10.1142/9789812834300_0255 | null | gr-qc | null | In the present work, an alternative interpretation of the source of
accelerated expansion of the Universe is suggested. A probable candidate is the
interaction between the quantum spin of a moving particle and the torsion of
space-time, produced by the background gravitational field of the Universe.
This interaction ... | [
{
"created": "Fri, 27 Apr 2007 23:05:20 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Wanas",
"M. I.",
""
]
] | In the present work, an alternative interpretation of the source of accelerated expansion of the Universe is suggested. A probable candidate is the interaction between the quantum spin of a moving particle and the torsion of space-time, produced by the background gravitational field of the Universe. This interaction ha... |
gr-qc/9503021 | Hans-Juergen Schmidt | Sabine Kluske and Hans - Juergen Schmidt | Towards a no hair theorem for higher order gravity | 35 pages, latex, no figures, e-mail hjschmi@rz.uni-potsdam.de,
kluske@rz.uni-potsdam.de revised version March 1995, subm. to Class. Quant.
Grav. | Astron.Nachr. 317 (1996) 337-348 | 10.1002/asna.2113170506 | Uni Potsdam Math-94/14 | gr-qc | null | We use gravitational Lagrangians $R \Box \sp k R \sqrt{-g}$ and linear
combinations of them; we ask under which circumstances the de Sitter space-time
represents an attractor solution in the set of spatially flat Friedman models.
Results are: For arbitrary $k$, i.e., for arbitrarily large order of the field
equation,... | [
{
"created": "Mon, 13 Mar 1995 16:34:44 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Kluske",
"Sabine",
""
],
[
"Schmidt",
"Hans - Juergen",
""
]
] | We use gravitational Lagrangians $R \Box \sp k R \sqrt{-g}$ and linear combinations of them; we ask under which circumstances the de Sitter space-time represents an attractor solution in the set of spatially flat Friedman models. Results are: For arbitrary $k$, i.e., for arbitrarily large order of the field equation, o... |
gr-qc/9705042 | Georges Bressange | C. Barrab\`es, G. F. Bressange and P. A. Hogan | Implications of Spontaneous Glitches in the Mass and Angular Momentum in
Kerr Space-Time | 16 pages, TeX, no figures, accepted for publication in Phys. Rev. D | Phys.Rev. D56 (1997) 2109-2112 | 10.1103/PhysRevD.56.2109 | null | gr-qc | null | The outward-pointing principal null direction of the Schwarzschild Riemann
tensor is null hypersurface-forming. If the Schwarzschild mass spontaneously
jumps across one such hypersurface then the hypersurface is the history of an
outgoing light-like shell. The outward-- pointing principal null direction of
the Kerr R... | [
{
"created": "Thu, 15 May 1997 08:20:56 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Barrabès",
"C.",
""
],
[
"Bressange",
"G. F.",
""
],
[
"Hogan",
"P. A.",
""
]
] | The outward-pointing principal null direction of the Schwarzschild Riemann tensor is null hypersurface-forming. If the Schwarzschild mass spontaneously jumps across one such hypersurface then the hypersurface is the history of an outgoing light-like shell. The outward-- pointing principal null direction of the Kerr Rie... |
1410.4526 | Jacek Tafel | Jacek Tafel | Covariant description of isothermic surfaces | 11 pages | Rep. Math. Phys. 78, 295 (2016) | 10.1016/S0034-4877(17)30010-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a covariant formulation of the Gauss-Weingarten equations and the
Gauss-Mainardi-Codazzi equations for surfaces in 3-dimensional curved spaces.
We derive a coordinate invariant condition on the first and second fundamental
form which is locally necessary and sufficient for the surface to be
isothermic. We ... | [
{
"created": "Thu, 16 Oct 2014 18:27:48 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2016 15:22:52 GMT",
"version": "v2"
}
] | 2020-02-26 | [
[
"Tafel",
"Jacek",
""
]
] | We present a covariant formulation of the Gauss-Weingarten equations and the Gauss-Mainardi-Codazzi equations for surfaces in 3-dimensional curved spaces. We derive a coordinate invariant condition on the first and second fundamental form which is locally necessary and sufficient for the surface to be isothermic. We sh... |
gr-qc/0702104 | Mattias Marklund | G. Betschart, C. Zunkel, P.K.S. Dunsby, M. Marklund | Response to ``Comment on `Primordial magnetic seed field amplification
by gravitational waves' " | 4 pages, 2 figures, to appear in Physical Review D | Phys.Rev.D75:087902,2007 | 10.1103/PhysRevD.75.087902 | null | gr-qc astro-ph | null | Here we respond to the comment by Tsagas (gr-qc/0503042) on our paper
gr-qc/0503006. We show that the results in that comment are flawed and cannot
be used for drawing conclusion about the nature of magnetic field amplification
by gravitational waves, and give further support that the results of
gr-qc/0503006 are cor... | [
{
"created": "Mon, 19 Feb 2007 14:36:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Betschart",
"G.",
""
],
[
"Zunkel",
"C.",
""
],
[
"Dunsby",
"P. K. S.",
""
],
[
"Marklund",
"M.",
""
]
] | Here we respond to the comment by Tsagas (gr-qc/0503042) on our paper gr-qc/0503006. We show that the results in that comment are flawed and cannot be used for drawing conclusion about the nature of magnetic field amplification by gravitational waves, and give further support that the results of gr-qc/0503006 are corre... |
1401.1548 | Hirotada Okawa | Hirotada Okawa, Helvi Witek, Vitor Cardoso | Black holes and fundamental fields in Numerical Relativity: initial data
construction and evolution of bound states | 24 pages, 15 figures; v2. Overall revision including substantial
improvements in the discussion of the initial data, refs added | Phys. Rev. D 89, 104032 (2014) | 10.1103/PhysRevD.89.104032 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fundamental fields are a natural outcome in cosmology and particle physics
and might therefore serve as a proxy for more complex interactions. The
equivalence principle implies that all forms of matter gravitate, and one
therefore expects relevant, universal imprints of new physics in strong field
gravity, such as th... | [
{
"created": "Wed, 8 Jan 2014 00:07:00 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Mar 2014 14:15:50 GMT",
"version": "v2"
}
] | 2014-05-28 | [
[
"Okawa",
"Hirotada",
""
],
[
"Witek",
"Helvi",
""
],
[
"Cardoso",
"Vitor",
""
]
] | Fundamental fields are a natural outcome in cosmology and particle physics and might therefore serve as a proxy for more complex interactions. The equivalence principle implies that all forms of matter gravitate, and one therefore expects relevant, universal imprints of new physics in strong field gravity, such as that... |
1412.3950 | Shahram Jalalzadeh | M. Rashki and S. Jalalzadeh | Holography from quantum cosmology | 7 pages, 1 figure, to appear in Phys. Rev. D | Phys. Rev. D 91 (2015) 023501 | 10.1103/PhysRevD.91.023501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Weyl-Wigner-Groenewold-Moyal formalism of deformation quantization is
applied to the closed Friedmann-Lema\^itre-Robertson-Walker (FLRW) cosmological
model. We show that the phase space average for the surface of the apparent
horizon is quantized in units of the Planck's surface, and that the total
entropy of the... | [
{
"created": "Fri, 12 Dec 2014 11:12:40 GMT",
"version": "v1"
}
] | 2015-02-26 | [
[
"Rashki",
"M.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | The Weyl-Wigner-Groenewold-Moyal formalism of deformation quantization is applied to the closed Friedmann-Lema\^itre-Robertson-Walker (FLRW) cosmological model. We show that the phase space average for the surface of the apparent horizon is quantized in units of the Planck's surface, and that the total entropy of the u... |
gr-qc/0611109 | Ewald Wessels | Nail H. Ibragimov (1), Ewald J. H. Wessels (2) and George F. R. Ellis
(2) ((1) Research Centre ALGA: Advances in Lie Group Analysis, Blekinge
Institute of Technology, Karlskrona, Sweden (2) Department of Applied
Mathematics, University of Cape Town, Cape Town, South Africa.) | Group classification of the Sachs equations for a radiating
axisymmetric, non-rotating, vacuum space-time | 18 Pages. Submitted to Classical and Quantum Gravity | Class.Quant.Grav.24:6007-6017,2007 | 10.1088/0264-9381/24/23/020 | null | gr-qc | null | We carry out a Lie group analysis of the Sachs equations for a time-dependent
axisymmetric non-rotating space-time in which the Ricci tensor vanishes. These
equations, which are the first two members of the set of Newman-Penrose
equations, define the characteristic initial-value problem for the space-time.
We find a ... | [
{
"created": "Tue, 21 Nov 2006 11:48:53 GMT",
"version": "v1"
}
] | 2009-03-19 | [
[
"Ibragimov",
"Nail H.",
""
],
[
"Wessels",
"Ewald J. H.",
""
],
[
"Ellis",
"George F. R.",
""
]
] | We carry out a Lie group analysis of the Sachs equations for a time-dependent axisymmetric non-rotating space-time in which the Ricci tensor vanishes. These equations, which are the first two members of the set of Newman-Penrose equations, define the characteristic initial-value problem for the space-time. We find a pa... |
2012.06479 | Joel Berg\'e | Alain Robert, Valerio Cipolla, Pascal Prieur, Pierre Touboul, Gilles
M\'etris, Manuel Rodrigues, Yves Andr\'e, Joel Berg\'e, Damien Boulanger,
Ratana Chhun, Bruno Christophe, Pierre-Yves Guidotti, Emilie Hardy, Vincent
Lebat, Thomas Lienart, Fran\c{c}oise Liorzou, Benjamin Pouilloux | MICROSCOPE Satellite and its Drag-Free and Attitude Control System | References updated | null | null | null | gr-qc astro-ph.IM physics.space-ph | http://creativecommons.org/licenses/by/4.0/ | This paper focus on the description of the design and performance of the
MICROSCOPE satellite and its Drag-Free and Attitude Control System (DFACS). The
satellite is derived from CNES' Myriade platform family, albeit with
significant upgrades dictated by the unprecedented MICROSCOPE's mission
requirements. The 300kg ... | [
{
"created": "Fri, 11 Dec 2020 16:46:45 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Dec 2020 12:37:49 GMT",
"version": "v2"
}
] | 2020-12-23 | [
[
"Robert",
"Alain",
""
],
[
"Cipolla",
"Valerio",
""
],
[
"Prieur",
"Pascal",
""
],
[
"Touboul",
"Pierre",
""
],
[
"Métris",
"Gilles",
""
],
[
"Rodrigues",
"Manuel",
""
],
[
"André",
"Yves",
""
],
[
... | This paper focus on the description of the design and performance of the MICROSCOPE satellite and its Drag-Free and Attitude Control System (DFACS). The satellite is derived from CNES' Myriade platform family, albeit with significant upgrades dictated by the unprecedented MICROSCOPE's mission requirements. The 300kg dr... |
gr-qc/0408092 | Yousuke Itoh | Y. Itoh, M.A. Papa, B. Krishnan, X. Siemens | Chi-square test on candidate events from CW signal coherent searches | proceedings of GWDAW8, 2003 conference, 12pages, 6 figures | Class.Quant.Grav. 21 (2004) S1667-S1678 | 10.1088/0264-9381/21/20/009 | null | gr-qc | null | In a blind search for continuous gravitational wave signals scanning a wide
frequency band one looks for candidate events with significantly large values
of the detection statistic. Unfortunately, a noise line in the data may also
produce a moderately large detection statistic.
In this paper, we describe how we can... | [
{
"created": "Sun, 29 Aug 2004 18:31:54 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Itoh",
"Y.",
""
],
[
"Papa",
"M. A.",
""
],
[
"Krishnan",
"B.",
""
],
[
"Siemens",
"X.",
""
]
] | In a blind search for continuous gravitational wave signals scanning a wide frequency band one looks for candidate events with significantly large values of the detection statistic. Unfortunately, a noise line in the data may also produce a moderately large detection statistic. In this paper, we describe how we can dis... |
2310.00253 | Yan-Gang Miao | Zhong-Wu Xia, Hao Yang, Yan-Gang Miao | Scalar fields around a rotating loop quantum gravity black hole:
Waveform, quasi-normal modes and superradiance | v1: 24 pages, 6 figures, 2 tables; v2: 26 pages, clarifications and
references added, final version to appear in Classical and Quantum Gravity | Class. Quantum Grav. 41 (2024) 165010 (22 pages) | 10.1088/1361-6382/ad6129 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The rotating loop quantum gravity black hole is a newly proposed non-singular
black hole, which eliminates spacetime singularities when a regularization
parameter is introduced through loop quantum corrections. This parameter is
expected to give rise to observable effects. In this paper, the dynamical
behavior of a s... | [
{
"created": "Sat, 30 Sep 2023 04:50:42 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jul 2024 06:41:14 GMT",
"version": "v2"
}
] | 2024-07-23 | [
[
"Xia",
"Zhong-Wu",
""
],
[
"Yang",
"Hao",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | The rotating loop quantum gravity black hole is a newly proposed non-singular black hole, which eliminates spacetime singularities when a regularization parameter is introduced through loop quantum corrections. This parameter is expected to give rise to observable effects. In this paper, the dynamical behavior of a sca... |
gr-qc/9605034 | Paulo Rodrigues Lima Vargas Moniz | P.V. Moniz | `` Rerum Universitas Sententia ex Susy'' (A View of the Universe
according to Supersymmetry) | 6 pages, plain LaTeX, updated-revised version of a Report written for
the 1996 Awards for Essays on Gravitation | null | null | DAMTP R96/13 | gr-qc | null | The question if conserved currents can be sensibly defined in supersymmetric
minisuperspaces is investigated in this essay. The objective is to employ
exclusively the differential equations obtained {\em directly} from the Lorentz
and supersymmetry quantum constraints. The ``square-root'' structure of N=1
supergravit... | [
{
"created": "Fri, 17 May 1996 08:54:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moniz",
"P. V.",
""
]
] | The question if conserved currents can be sensibly defined in supersymmetric minisuperspaces is investigated in this essay. The objective is to employ exclusively the differential equations obtained {\em directly} from the Lorentz and supersymmetry quantum constraints. The ``square-root'' structure of N=1 supergravity ... |
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