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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1012.2456 | Sebastiano Bernuzzi | Sebastiano Bernuzzi, Alessandro Nagar and Anil Zenginoglu | Binary black hole coalescence in the extreme-mass-ratio limit: testing
and improving the effective-one-body multipolar waveform | null | Phys.Rev.D83:064010,2011 | 10.1103/PhysRevD.83.064010 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the properties of the effective-one-body (EOB) multipolar
gravitational waveform emitted by nonspinning black-hole binaries of masses
$\mu$ and $M$ in the extreme-mass-ratio limit, $\mu/M=\nu\ll 1$. We focus on
the transition from quasicircular inspiral to plunge, merger and ringdown.We
compare the EOB wav... | [
{
"created": "Sat, 11 Dec 2010 13:34:26 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Mar 2011 19:13:58 GMT",
"version": "v2"
}
] | 2011-03-22 | [
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Zenginoglu",
"Anil",
""
]
] | We discuss the properties of the effective-one-body (EOB) multipolar gravitational waveform emitted by nonspinning black-hole binaries of masses $\mu$ and $M$ in the extreme-mass-ratio limit, $\mu/M=\nu\ll 1$. We focus on the transition from quasicircular inspiral to plunge, merger and ringdown.We compare the EOB wavef... |
2405.15878 | Ankur Barsode | A. Barsode, S. J. Kapadia, P. Ajith | Constraints on compact dark matter from the non-observation of
gravitational-wave strong lensing | 8 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We use the non-observation of strong lensing of gravitational waves (GWs) in
the first three observation runs of LIGO-Virgo detectors to constrain the
fraction of dark matter in the form of compact objects in the mass range
$10^{6}-10^{9}~{\mathrm{M}_\odot}$. Using a Bayesian formalism supplemented by
astrophysical s... | [
{
"created": "Fri, 24 May 2024 18:42:23 GMT",
"version": "v1"
}
] | 2024-05-28 | [
[
"Barsode",
"A.",
""
],
[
"Kapadia",
"S. J.",
""
],
[
"Ajith",
"P.",
""
]
] | We use the non-observation of strong lensing of gravitational waves (GWs) in the first three observation runs of LIGO-Virgo detectors to constrain the fraction of dark matter in the form of compact objects in the mass range $10^{6}-10^{9}~{\mathrm{M}_\odot}$. Using a Bayesian formalism supplemented by astrophysical sim... |
0803.2508 | Roberto Chan | R. Chan, M. F. A. da Silva, J. F. Villas da Rocha | On Anisotropic Dark Energy | 15 pages, 1 figure, Abstract and Introduction changed, references
added, corrected typos, accepted for publication in MPLA | Mod.Phys.Lett.A24:1137-1146,2009 | 10.1142/S0217732309028692 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the discovery of the accelerated expansion of the universe, it was
necessary to introduce a new component of matter distribution called dark
energy. The standard cosmological model considers isotropy of the pressure and
assumes an equation of state $p=\omega \rho$, relating the pressure $p$ and the
energy densi... | [
{
"created": "Mon, 17 Mar 2008 19:20:21 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Sep 2008 14:01:42 GMT",
"version": "v2"
}
] | 2012-10-25 | [
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"da Rocha",
"J. F. Villas",
""
]
] | Since the discovery of the accelerated expansion of the universe, it was necessary to introduce a new component of matter distribution called dark energy. The standard cosmological model considers isotropy of the pressure and assumes an equation of state $p=\omega \rho$, relating the pressure $p$ and the energy density... |
0910.5751 | Aron Wall | Aron C. Wall | Proving the Achronal Averaged Null Energy Condition from the Generalized
Second Law | 19 pages, 1 figure. Added 2 paragraphs to end of section 2 | Phys.Rev.D81:024038,2010 | 10.1103/PhysRevD.81.024038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A null line is a complete achronal null geodesic. It is proven that for any
quantum fields minimally coupled to semiclassical Einstein gravity, the
averaged null energy condition (ANEC) on null lines is a consequence of the
generalized second law of thermodynamics for causal horizons. Auxiliary
assumptions include CP... | [
{
"created": "Thu, 29 Oct 2009 23:43:08 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2010 01:57:35 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Wall",
"Aron C.",
""
]
] | A null line is a complete achronal null geodesic. It is proven that for any quantum fields minimally coupled to semiclassical Einstein gravity, the averaged null energy condition (ANEC) on null lines is a consequence of the generalized second law of thermodynamics for causal horizons. Auxiliary assumptions include CPT ... |
2305.04011 | Spiros Cotsakis | Spiros Cotsakis, Jose P. Mimoso, John Miritzis | Legendre scalarization in gravity and cosmology | v2: 14 pages, 3 figures, matches published version | Eur. Phys. J. C (2023) 83:433 | 10.1140/epjc/s10052-023-11628-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new formulation of $f(R)$ gravity, dubbed scalarized $f(R)$
gravity, in which the Legendre transform is included as a dynamical term. This
leads to a theory with second-order field equations that describes general
relativity with a self-interacting scalar field, without requiring the
introduction of conf... | [
{
"created": "Sat, 6 May 2023 10:52:00 GMT",
"version": "v1"
},
{
"created": "Sat, 27 May 2023 06:24:07 GMT",
"version": "v2"
}
] | 2023-06-07 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Mimoso",
"Jose P.",
""
],
[
"Miritzis",
"John",
""
]
] | We propose a new formulation of $f(R)$ gravity, dubbed scalarized $f(R)$ gravity, in which the Legendre transform is included as a dynamical term. This leads to a theory with second-order field equations that describes general relativity with a self-interacting scalar field, without requiring the introduction of confor... |
1602.03840 | LVC Publications | The LIGO Scientific Collaboration and the Virgo Collaboration: The
LIGO Scientific Collaboration and the Virgo Collaboration: B. P. Abbott, R.
Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C. Adams, T.
Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K.
Agatsuma, N. Aggarw... | Properties of the Binary Black Hole Merger GW150914 | 19 pages, 6 figures | Phys. Rev. Lett. 116, 241102 (2016) | 10.1103/PhysRevLett.116.241102 | LIGO-P1500218 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | On September 14, 2015, the Laser Interferometer Gravitational-wave
Observatory (LIGO) detected a gravitational-wave transient (GW150914); we
characterize the properties of the source and its parameters. The data around
the time of the event were analyzed coherently across the LIGO network using a
suite of accurate wa... | [
{
"created": "Thu, 11 Feb 2016 19:26:47 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jun 2016 11:16:18 GMT",
"version": "v2"
}
] | 2016-06-21 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
... | On September 14, 2015, the Laser Interferometer Gravitational-wave Observatory (LIGO) detected a gravitational-wave transient (GW150914); we characterize the properties of the source and its parameters. The data around the time of the event were analyzed coherently across the LIGO network using a suite of accurate wave... |
2107.12615 | Bin Wu | Chao Wang, Bin Wu, Zhen-Ming Xu, Wen-Li Yang | Ruppeiner Geometry of the RN-AdS Black Hole Using Shadow Formalism | 18 pages, 9 figures | Nucl.Phys.B 976 (2022) 115698 | 10.1016/j.nuclphysb.2022.115698 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The connection between the shadow radius and the Ruppeiner geometry of a
charged static spherically symmetric black hole is investigated. The normalized
curvature scalar is adopted, and its close relation to the Van der Waals-like
and Hawking-Page phase transition of Reissner-Nordstr\"{o}m AdS black hole is
studied. ... | [
{
"created": "Tue, 27 Jul 2021 06:02:19 GMT",
"version": "v1"
}
] | 2022-03-17 | [
[
"Wang",
"Chao",
""
],
[
"Wu",
"Bin",
""
],
[
"Xu",
"Zhen-Ming",
""
],
[
"Yang",
"Wen-Li",
""
]
] | The connection between the shadow radius and the Ruppeiner geometry of a charged static spherically symmetric black hole is investigated. The normalized curvature scalar is adopted, and its close relation to the Van der Waals-like and Hawking-Page phase transition of Reissner-Nordstr\"{o}m AdS black hole is studied. Th... |
2009.05193 | Yun Soo Myung | Yun Soo Myung, De-Cheng Zou | Scalarized charged black holes in the Einstein-Maxwell-Scalar theory
with two U(1) fields | 20 pages, 10 figures | null | 10.1016/j.physletb.2020.135905 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate scalarized charged black holes in the Einstein-Maxwell-Scalar
theory with two U(1) fields inspired by the $N=4$ supergravity. From the onset
of the spontaneous scalarization (tachyonic instability of
Reissner-Nordstr\"{o}m black hole), these black holes are classified by the
number of $n=0,1,2,\cdots$,... | [
{
"created": "Fri, 11 Sep 2020 01:29:22 GMT",
"version": "v1"
}
] | 2020-11-04 | [
[
"Myung",
"Yun Soo",
""
],
[
"Zou",
"De-Cheng",
""
]
] | We investigate scalarized charged black holes in the Einstein-Maxwell-Scalar theory with two U(1) fields inspired by the $N=4$ supergravity. From the onset of the spontaneous scalarization (tachyonic instability of Reissner-Nordstr\"{o}m black hole), these black holes are classified by the number of $n=0,1,2,\cdots$, w... |
1111.3536 | Stoytcho Yazadjiev | Stoytcho Yazadjiev | Relativistic models of magnetars: Nonperturbative analytical approach | 10 pages, LaTex | null | 10.1103/PhysRevD.85.044030 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we focus on building simple nonperturbative analytical
relativistic models of magnetars. With this purpose in mind we first develop a
method for generating exact interior solutions to the static and axisymmetric
Einstein-Maxwell-hydrodynamic equations with anisotropic perfect fluid and with
pure ... | [
{
"created": "Tue, 15 Nov 2011 14:37:15 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Yazadjiev",
"Stoytcho",
""
]
] | In the present paper we focus on building simple nonperturbative analytical relativistic models of magnetars. With this purpose in mind we first develop a method for generating exact interior solutions to the static and axisymmetric Einstein-Maxwell-hydrodynamic equations with anisotropic perfect fluid and with pure po... |
0803.1485 | Daniel Grumiller | D. Grumiller, R. Mann and R. McNees | Dirichlet boundary value problem for Chern-Simons modified gravity | 4 pages, revtex4, v2: added Refs., made one statement stronger, added
footnote and added paragraph on single field inflation | Phys.Rev.D78:081502,2008 | 10.1103/PhysRevD.78.081502 | MIT-CTP 3933 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Chern-Simons modified gravity comprises the Einstein-Hilbert action and a
higher-derivative interaction containing the Chern-Pontryagin density. We
derive the analog of the Gibbons-Hawking-York boundary term required to render
the Dirichlet boundary value problem well-defined. It turns out to be a
boundary Chern-Simo... | [
{
"created": "Mon, 10 Mar 2008 20:01:01 GMT",
"version": "v1"
},
{
"created": "Tue, 20 May 2008 21:29:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Grumiller",
"D.",
""
],
[
"Mann",
"R.",
""
],
[
"McNees",
"R.",
""
]
] | Chern-Simons modified gravity comprises the Einstein-Hilbert action and a higher-derivative interaction containing the Chern-Pontryagin density. We derive the analog of the Gibbons-Hawking-York boundary term required to render the Dirichlet boundary value problem well-defined. It turns out to be a boundary Chern-Simons... |
2012.00599 | David Garfinkle | David Garfinkle | The electric field of a charge in the vicinity of a higher dimensional
black hole | null | Phys. Rev. D 103, 024056 (2021) | 10.1103/PhysRevD.103.024056 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find the electric field of a point charge in the presence of a higher
dimensional black hole. As the charge is lowered to the horizon, all higher
multipole moments go to zero, and only the Coulomb field remains.
| [
{
"created": "Tue, 1 Dec 2020 16:08:05 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Garfinkle",
"David",
""
]
] | We find the electric field of a point charge in the presence of a higher dimensional black hole. As the charge is lowered to the horizon, all higher multipole moments go to zero, and only the Coulomb field remains. |
1711.04137 | Soumya Jana | Soumya Jana, Girish Kumar Chakravarty, Subhendra Mohanty (PRL
Ahmedabad, India) | Constraints on Born-Infeld gravity from the speed of gravitational waves
after GW170817 and GRB 170817A | 5 pages. Published version | Phys. Rev. D 97, 084011 (2018) | 10.1103/PhysRevD.97.084011 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observations of gravitational waves from the binary neutron star merger
event GW170817 and the subsequent observation of its electromagnetic
counterparts from the gamma-ray burst GRB 170817A provide us a significant
opportunity to study theories of gravity beyond general relativity. An
important outcome of these ... | [
{
"created": "Sat, 11 Nov 2017 13:59:39 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2018 13:33:43 GMT",
"version": "v2"
}
] | 2018-04-11 | [
[
"Jana",
"Soumya",
"",
"PRL\n Ahmedabad, India"
],
[
"Chakravarty",
"Girish Kumar",
"",
"PRL\n Ahmedabad, India"
],
[
"Mohanty",
"Subhendra",
"",
"PRL\n Ahmedabad, India"
]
] | The observations of gravitational waves from the binary neutron star merger event GW170817 and the subsequent observation of its electromagnetic counterparts from the gamma-ray burst GRB 170817A provide us a significant opportunity to study theories of gravity beyond general relativity. An important outcome of these ob... |
gr-qc/0504112 | Andrzej Krolak | Jeffrey A. Edlund, Massimo Tinto, Andrzej Krolak, and Gijs Nelemans | The White Dwarf -- White Dwarf galactic background in the LISA data | 36 pages, 15 figures | Phys.Rev.D71:122003,2005 | 10.1103/PhysRevD.71.122003 | null | gr-qc | null | LISA (Laser Interferometer Space Antenna) is a proposed space mission, which
will use coherent laser beams exchanged between three remote spacecraft to
detect and study low-frequency cosmic gravitational radiation. In the low-part
of its frequency band, the LISA strain sensitivity will be dominated by the
incoherent ... | [
{
"created": "Fri, 22 Apr 2005 17:44:29 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Edlund",
"Jeffrey A.",
""
],
[
"Tinto",
"Massimo",
""
],
[
"Krolak",
"Andrzej",
""
],
[
"Nelemans",
"Gijs",
""
]
] | LISA (Laser Interferometer Space Antenna) is a proposed space mission, which will use coherent laser beams exchanged between three remote spacecraft to detect and study low-frequency cosmic gravitational radiation. In the low-part of its frequency band, the LISA strain sensitivity will be dominated by the incoherent su... |
1604.06893 | Pradip Mukherjee | Rabin Banerjee and Pradip Mukherjee | Torsional Newton-Cartan geometry from Galilean gauge theory | 21 pages, latex, journal version | Class. Quantum Grav. 33 225013 2016 | 10.1088/0264-9381/33/22/225013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the recently advanced Galilean gauge theory (GGT) we give a
comprehensive construction of torsional Newton Cartan geometry. The coupling of
a Galilean symmetric model with background NC geometry following GGT is
illustrated by a free nonrelativistic scalar field theory. The issue of spatial
diffeomorphisn \cite... | [
{
"created": "Sat, 23 Apr 2016 11:01:01 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jul 2016 18:22:24 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Nov 2016 07:24:31 GMT",
"version": "v3"
}
] | 2016-11-03 | [
[
"Banerjee",
"Rabin",
""
],
[
"Mukherjee",
"Pradip",
""
]
] | Using the recently advanced Galilean gauge theory (GGT) we give a comprehensive construction of torsional Newton Cartan geometry. The coupling of a Galilean symmetric model with background NC geometry following GGT is illustrated by a free nonrelativistic scalar field theory. The issue of spatial diffeomorphisn \cite{S... |
gr-qc/9812018 | Yogesh Joglekar | Tulsi Dass, Yogesh N. Joglekar (Indian Institute of Technology,
Kanpur, India) | Symmetries and conservation laws in histories-based generalized quantum
mechanics | 31 pages. Several typos corrected. A combined version of this paper
and gr-qc/9905028 (available at gr-qc/0001006) will be published in Annals of
Physics | null | null | null | gr-qc quant-ph | null | Symmetries are defined in histories-based generalized quantum mechanics
paying special attention to the class of history theories admitting
quasitemporal structure (a generalization of the concept of `temporal
sequences' of `events' using partial semigroups) and logic structure for
`single time histories'. Symmetries... | [
{
"created": "Sat, 5 Dec 1998 00:44:40 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Dec 1998 01:10:46 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Dec 1998 00:38:14 GMT",
"version": "v3"
},
{
"created": "Sun, 17 Sep 2000 20:39:03 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Dass",
"Tulsi",
"",
"Indian Institute of Technology,\n Kanpur, India"
],
[
"Joglekar",
"Yogesh N.",
"",
"Indian Institute of Technology,\n Kanpur, India"
]
] | Symmetries are defined in histories-based generalized quantum mechanics paying special attention to the class of history theories admitting quasitemporal structure (a generalization of the concept of `temporal sequences' of `events' using partial semigroups) and logic structure for `single time histories'. Symmetries a... |
1011.0875 | Mubasher Jamil | M. R. Setare and Mubasher Jamil | Correspondence between entropy-corrected holographic and Gauss-Bonnet
dark energy models | 10 pages, accepted by Europhysics Letters for publication | Europhys.Lett.92:49003,2010 | 10.1209/0295-5075/92/49003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we investigate the cosmological implications of the
entropy-corrected holographic dark energy (ECHDE) density in the Gauss-Bonnet
framework. This is motivated from the loop quantum gravity corrections to the
entropy-area law. Assuming the two cosmological scenarios are valid
simultaneously, we sho... | [
{
"created": "Wed, 3 Nov 2010 13:32:11 GMT",
"version": "v1"
}
] | 2011-01-28 | [
[
"Setare",
"M. R.",
""
],
[
"Jamil",
"Mubasher",
""
]
] | In the present work we investigate the cosmological implications of the entropy-corrected holographic dark energy (ECHDE) density in the Gauss-Bonnet framework. This is motivated from the loop quantum gravity corrections to the entropy-area law. Assuming the two cosmological scenarios are valid simultaneously, we show ... |
2107.14666 | Andr\'e Gro{\ss}ardt | Andr\'e Gro{\ss}ardt | Comment on "Do Gedankenexperiments compel quantization of gravity" | Comment on arXiv:2107.07514 | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | There is no conclusive theoretical argument that would require the
quantization of the gravitational field. A paradox presented by Mari et al.
[Sci. Rep. 6, 22777 (2016)] and its resolution by Belenchia et al. [Phys. Rev.
D 98, 126009 (2018)] did not change anything about this assertion. Despite
being interesting in ... | [
{
"created": "Fri, 30 Jul 2021 14:36:22 GMT",
"version": "v1"
}
] | 2021-08-02 | [
[
"Großardt",
"André",
""
]
] | There is no conclusive theoretical argument that would require the quantization of the gravitational field. A paradox presented by Mari et al. [Sci. Rep. 6, 22777 (2016)] and its resolution by Belenchia et al. [Phys. Rev. D 98, 126009 (2018)] did not change anything about this assertion. Despite being interesting in ot... |
gr-qc/9502032 | Olga Buryak | O. E. Buryak | STOCHASTIC DYNAMICS OF LARGE-SCALE INFLATION IN DE~SITTER SPACE | 21 pages RevTex preprint style | Phys.Rev. D53 (1996) 1763-1775 | 10.1103/PhysRevD.53.1763 | NCL95-TP1 | gr-qc | null | In this paper we derive exact quantum Langevin equations for stochastic
dynamics of large-scale inflation in de~Sitter space. These quantum Langevin
equations are the equivalent of the Wigner equation and are described by a
system of stochastic differential equations. We present a formula for the
calculation of the e... | [
{
"created": "Thu, 16 Feb 1995 12:09:06 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Buryak",
"O. E.",
""
]
] | In this paper we derive exact quantum Langevin equations for stochastic dynamics of large-scale inflation in de~Sitter space. These quantum Langevin equations are the equivalent of the Wigner equation and are described by a system of stochastic differential equations. We present a formula for the calculation of the exp... |
1407.8143 | Giulia Gubitosi | Giovanni Amelino-Camelia, Leonardo Barcaroli, Giulia Gubitosi, Stefano
Liberati, Niccol\'o Loret | Realization of DSR-relativistic symmetries in Finsler geometries | null | Phys. Rev. D 90, 125030 (2014) | 10.1103/PhysRevD.90.125030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Finsler geometry is a well known generalization of Riemannian geometry which
allows to account for a possibly non trivial structure of the space of
configurations of relativistic particles. We here establish a link between
Finsler geometry and the sort of models with curved momentum space and
DSR-relativistic symmetr... | [
{
"created": "Wed, 30 Jul 2014 17:56:38 GMT",
"version": "v1"
}
] | 2015-01-07 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Barcaroli",
"Leonardo",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Loret",
"Niccoló",
""
]
] | Finsler geometry is a well known generalization of Riemannian geometry which allows to account for a possibly non trivial structure of the space of configurations of relativistic particles. We here establish a link between Finsler geometry and the sort of models with curved momentum space and DSR-relativistic symmetrie... |
1907.02924 | Marco Crisostomi | Christos Charmousis, Marco Crisostomi, David Langlois, Karim Noui | Perturbations of a rotating black hole in DHOST theories | 6 pages | null | 10.1088/1361-6382/ab4fb1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study linear perturbations of a rotating black hole solution that has been
recently discovered in degenerate higher-order scalar-tensor (DHOST) theories.
We find a parametrization which permits the explicit resolution of the scalar
perturbation while the tensor perturbation is obtained as a Teukolsky equation
supp... | [
{
"created": "Fri, 5 Jul 2019 16:48:02 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Charmousis",
"Christos",
""
],
[
"Crisostomi",
"Marco",
""
],
[
"Langlois",
"David",
""
],
[
"Noui",
"Karim",
""
]
] | We study linear perturbations of a rotating black hole solution that has been recently discovered in degenerate higher-order scalar-tensor (DHOST) theories. We find a parametrization which permits the explicit resolution of the scalar perturbation while the tensor perturbation is obtained as a Teukolsky equation supple... |
1801.01912 | Ali A. Asgari | Ali A. Asgari, Amir H. Abbassi, Jafar Khodagholizadeh | Curvature and topology dependency of the cosmological spectra | 9 pages,12 figures | Results Phys 12, 2225 (2019) | 10.1016/j.rinp.2019.02.039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we investigate dependency of the adiabatic and entropy
spectral indices of the cosmological perturbations on the geometry and topology
of the background universe. Our discussion includes the post-inflationary
universe i.e. radiation-dust mixture era. For this purpose, we first extract an
explicit equa... | [
{
"created": "Fri, 5 Jan 2018 20:39:47 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2019 22:57:41 GMT",
"version": "v2"
}
] | 2019-03-11 | [
[
"Asgari",
"Ali A.",
""
],
[
"Abbassi",
"Amir H.",
""
],
[
"Khodagholizadeh",
"Jafar",
""
]
] | In this article we investigate dependency of the adiabatic and entropy spectral indices of the cosmological perturbations on the geometry and topology of the background universe. Our discussion includes the post-inflationary universe i.e. radiation-dust mixture era. For this purpose, we first extract an explicit equati... |
gr-qc/0308047 | Eirini Messaritaki | Eirini Messaritaki (University of Florida) | Radiation Reaction on Moving Particles in General Relativity | Doctoral Dissertation, 136 pages, 5 figures | null | null | null | gr-qc | null | A particle in the vicinity of a Schwarzschild black hole is known to trace a
geodesic of the Schwarzschild background, to a first approximation. If the
interaction of the particle with its own field (scalar, electromagnetic or
gravitational) is taken into account, the path is no longer a background
geodesic and the s... | [
{
"created": "Thu, 14 Aug 2003 18:19:48 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Messaritaki",
"Eirini",
"",
"University of Florida"
]
] | A particle in the vicinity of a Schwarzschild black hole is known to trace a geodesic of the Schwarzschild background, to a first approximation. If the interaction of the particle with its own field (scalar, electromagnetic or gravitational) is taken into account, the path is no longer a background geodesic and the sel... |
2206.06750 | Dipanjan Dey | Vishva Patel, Divya Tahelyani, Ashok B. Joshi, Dipanjan Dey, Pankaj S.
Joshi | Light trajectory and shadow shape in the rotating naked singularity | 12 pages, 4 figures | null | 10.1140/epjc/s10052-022-10638-w | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the light trajectories and shadow properties in
the rotating version of null naked singularity (NNS) spacetime which is derived
using the Newman- Janis algorithm without complexification method. We discuss
some of the geometrical properties and causal structure of Rotating Naked
Singular... | [
{
"created": "Tue, 14 Jun 2022 10:50:16 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Patel",
"Vishva",
""
],
[
"Tahelyani",
"Divya",
""
],
[
"Joshi",
"Ashok B.",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | In this paper, we investigate the light trajectories and shadow properties in the rotating version of null naked singularity (NNS) spacetime which is derived using the Newman- Janis algorithm without complexification method. We discuss some of the geometrical properties and causal structure of Rotating Naked Singularit... |
1305.5191 | Jan Holland | Jan Holland and Stefan Hollands | A small cosmological constant due to non-perturbative quantum effects | 11 pages | Class. Quantum Grav. 31 (2014) 125006 | 10.1088/0264-9381/31/12/125006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that the expectation value of the stress energy tensor of the
Standard Model should be given by $< T_{\mu \nu} > = \rho_\vac \eta_{\mu\nu}$,
with a vacuum energy $\rho_\vac$ that differs from the usual "dimensional
analysis" result by an exponentially small factor associated with
non-perturbative effects. ... | [
{
"created": "Wed, 22 May 2013 16:49:02 GMT",
"version": "v1"
}
] | 2014-06-02 | [
[
"Holland",
"Jan",
""
],
[
"Hollands",
"Stefan",
""
]
] | We propose that the expectation value of the stress energy tensor of the Standard Model should be given by $< T_{\mu \nu} > = \rho_\vac \eta_{\mu\nu}$, with a vacuum energy $\rho_\vac$ that differs from the usual "dimensional analysis" result by an exponentially small factor associated with non-perturbative effects. We... |
gr-qc/0512078 | Stephen Fairhurst | LIGO Scientific Collaboration, TAMA Collaboration | Joint LIGO and TAMA300 Search for Gravitational Waves from Inspiralling
Neutron Star Binaries | 9 pages, 5 figures. Updated with published version | Phys.Rev.D73:102002,2006 | 10.1103/PhysRevD.73.102002 | LIGO-P050017-01-Z | gr-qc | null | We search for coincident gravitational wave signals from inspiralling neutron
star binaries using LIGO and TAMA300 data taken during early 2003. Using a
simple trigger exchange method, we perform an inter-collaboration coincidence
search during times when TAMA300 and only one of the LIGO sites were
operational. We fi... | [
{
"created": "Tue, 13 Dec 2005 16:26:56 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Oct 2006 18:44:09 GMT",
"version": "v2"
}
] | 2012-08-27 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"TAMA Collaboration",
"",
""
]
] | We search for coincident gravitational wave signals from inspiralling neutron star binaries using LIGO and TAMA300 data taken during early 2003. Using a simple trigger exchange method, we perform an inter-collaboration coincidence search during times when TAMA300 and only one of the LIGO sites were operational. We find... |
gr-qc/9503008 | Paulo Rodrigues Lima Vargas Moniz | O. Bertolami (INFN - Sezione Torino) and P.V. Moniz (University of
Cambridge, DAMTP) | Decoherence Due to Massive Vector Fields with Global Symmetries | 5 pages, Talk at the 1st Mexican School in Gravitation and
mathematical physics, Guanajuato, Mexico, December 12-16 1994 | null | null | DAMTP R-94/22c | gr-qc | null | Retrieval of classical behaviour in quantum cosmology is usually discussed in
the framework of minisuperspace models in the presence of scalar fields
together with the inhomogeneous modes of gravitational or scalar fields. In
this work we propose alternatively a model where the scalar field is replaced
by a massive v... | [
{
"created": "Mon, 6 Mar 1995 14:03:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bertolami",
"O.",
"",
"INFN - Sezione Torino"
],
[
"Moniz",
"P. V.",
"",
"University of\n Cambridge, DAMTP"
]
] | Retrieval of classical behaviour in quantum cosmology is usually discussed in the framework of minisuperspace models in the presence of scalar fields together with the inhomogeneous modes of gravitational or scalar fields. In this work we propose alternatively a model where the scalar field is replaced by a massive vec... |
1803.07093 | Shahar Hod | Shahar Hod | Stationary bound-state scalar configurations supported by
rapidly-spinning exotic compact objects | 11 pages. arXiv admin note: text overlap with arXiv:1704.05856 | Physics Letters B 770, 186 (2017) | 10.1016/j.physletb.2017.04.065 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some quantum-gravity theories suggest that the absorbing horizon of a
classical black hole should be replaced by a reflective surface which is
located a microscopic distance above the would-be classical horizon. Instead of
an absorbing black hole, the resulting horizonless spacetime describes a
reflective exotic comp... | [
{
"created": "Mon, 19 Mar 2018 18:01:00 GMT",
"version": "v1"
}
] | 2018-03-28 | [
[
"Hod",
"Shahar",
""
]
] | Some quantum-gravity theories suggest that the absorbing horizon of a classical black hole should be replaced by a reflective surface which is located a microscopic distance above the would-be classical horizon. Instead of an absorbing black hole, the resulting horizonless spacetime describes a reflective exotic compac... |
2207.01292 | Alfredo Bautista | A. Bautista, A. Ibort, J. Lafuente | L-extensions and L-boundary of conformal spacetimes | 39 pages, 6 figures | General Relativity and Gravitation, volume 50, article number: 153
(2018) | 10.1007/s10714-018-2479-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notion of L-boundary, a new causal boundary proposed by R. Low based on
constructing a `sky at infinity' for any light ray, is discussed in detail. The
analysis of the notion of L-boundary will be done in the 3-dimensional
situation for the ease of presentation. The proposed notion of causal boundary
is intrinsic... | [
{
"created": "Mon, 4 Jul 2022 09:47:23 GMT",
"version": "v1"
}
] | 2022-07-05 | [
[
"Bautista",
"A.",
""
],
[
"Ibort",
"A.",
""
],
[
"Lafuente",
"J.",
""
]
] | The notion of L-boundary, a new causal boundary proposed by R. Low based on constructing a `sky at infinity' for any light ray, is discussed in detail. The analysis of the notion of L-boundary will be done in the 3-dimensional situation for the ease of presentation. The proposed notion of causal boundary is intrinsical... |
gr-qc/0205108 | Carlo Rovelli | Carlo Rovelli, Simone Speziale | Reconcile Planck-scale discreteness and the Lorentz-Fitzgerald
contraction | 12 pages, 3 figures | Phys.Rev. D67 (2003) 064019 | 10.1103/PhysRevD.67.064019 | null | gr-qc | null | A Planck-scale minimal observable length appears in many approaches to
quantum gravity. It is sometimes argued that this minimal length might conflict
with Lorentz invariance, because a boosted observer could see the minimal
length further Lorentz contracted. We show that this is not the case within
loop quantum grav... | [
{
"created": "Sat, 25 May 2002 13:51:52 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rovelli",
"Carlo",
""
],
[
"Speziale",
"Simone",
""
]
] | A Planck-scale minimal observable length appears in many approaches to quantum gravity. It is sometimes argued that this minimal length might conflict with Lorentz invariance, because a boosted observer could see the minimal length further Lorentz contracted. We show that this is not the case within loop quantum gravit... |
2105.09372 | Jacek Tafel | Jacek Tafel | The Einstein equations and multipole moments at null infinity | 19 pages | null | 10.1088/1361-6382/ac6b77 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider vacuum metrics admitting conformal compactification which is
smooth up to the scri $\mathscr{I^+}$. We write metric in the Bondi-Sachs form
and expand it into power series in the inverse affine distance $1/r$. Like in
the case of the luminosity distance, given the news tensor and initial data for
a part o... | [
{
"created": "Wed, 19 May 2021 19:27:22 GMT",
"version": "v1"
},
{
"created": "Mon, 31 May 2021 20:41:01 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Nov 2021 08:16:49 GMT",
"version": "v3"
},
{
"created": "Thu, 7 Apr 2022 18:43:19 GMT",
"version": "v4"
}
] | 2022-06-01 | [
[
"Tafel",
"Jacek",
""
]
] | We consider vacuum metrics admitting conformal compactification which is smooth up to the scri $\mathscr{I^+}$. We write metric in the Bondi-Sachs form and expand it into power series in the inverse affine distance $1/r$. Like in the case of the luminosity distance, given the news tensor and initial data for a part of ... |
gr-qc/0003014 | Bahram Mashhoon | Bahram Mashhoon | Measurement Theory and General Relativity | LaTeX springer style lamu.cls, 2 figures, 16 pages, published in:
Black Holes: Theory and Observation: Proceedings of the 179th W.E. Heraeus
Seminar, held August 1997 in Bad Honnef, Germany. F.W. Hehl et al.(eds).
(Springer, Berlin Heidelberg 1998) | Lect.Notes Phys. 514 (1998) 269-284 | 10.1007/b13593 | null | gr-qc | null | The theory of measurement is employed to elucidate the physical basis of
general relativity. For measurements involving phenomena with intrinsic length
or time scales, such scales must in general be negligible compared to the
(translational and rotational) scales characteristic of the motion of the
observer. Thus gen... | [
{
"created": "Sun, 5 Mar 2000 23:29:12 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Mashhoon",
"Bahram",
""
]
] | The theory of measurement is employed to elucidate the physical basis of general relativity. For measurements involving phenomena with intrinsic length or time scales, such scales must in general be negligible compared to the (translational and rotational) scales characteristic of the motion of the observer. Thus gener... |
1602.02378 | Alexander Zhidenko | Roman Konoplya, Luciano Rezzolla, and Alexander Zhidenko | General parametrization of axisymmetric black holes in metric theories
of gravity | 17 pages, to be published in PRD | Phys. Rev. D 93, 064015 (2016) | 10.1103/PhysRevD.93.064015 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following previous work of ours in spherical symmetry, we here propose a new
parametric framework to describe the spacetime of axisymmetric black holes in
generic metric theories of gravity. In this case, the metric components are
functions of both the radial and the polar angular coordinates, forcing a
double expans... | [
{
"created": "Sun, 7 Feb 2016 14:56:50 GMT",
"version": "v1"
}
] | 2016-03-11 | [
[
"Konoplya",
"Roman",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Zhidenko",
"Alexander",
""
]
] | Following previous work of ours in spherical symmetry, we here propose a new parametric framework to describe the spacetime of axisymmetric black holes in generic metric theories of gravity. In this case, the metric components are functions of both the radial and the polar angular coordinates, forcing a double expansio... |
1304.5205 | Vasudev Shyam S | Vasudev Shyam | On the Geometric Quantization of Canonical Gravity | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the hardest problems to tackle in the dynamics of canonical approaches
to quantum gravity is that of the Hamiltonian constraint. We investigate said
problem in the context of formal geometric quantization. We study the
implications of the non uniqueness in the choice of the vector field which
satisfies the pre... | [
{
"created": "Wed, 17 Apr 2013 15:13:23 GMT",
"version": "v1"
}
] | 2013-04-19 | [
[
"Shyam",
"Vasudev",
""
]
] | One of the hardest problems to tackle in the dynamics of canonical approaches to quantum gravity is that of the Hamiltonian constraint. We investigate said problem in the context of formal geometric quantization. We study the implications of the non uniqueness in the choice of the vector field which satisfies the presy... |
gr-qc/0611039 | Thomas Sotiriou | Thomas P. Sotiriou, Theocharis A. Apostolatos | Multipole moments as a tool to infer from gravitational waves the
geometry around an axisymmetric body | Talk given by T. P. S. at Albert Einstein's Century International
Conference, Paris, France, 18-22 Jul 2005 | AIP Conf. Proc. 861, 756 (2006) | 10.1063/1.2399654 | null | gr-qc | null | A binary system, composed of a compact object orbiting around a massive
central body, will emit gravitational waves which will depend on the central
body's spacetime geometry. We expect that the gravitational wave observables
will somehow ``encode'' the information about the spacetime structure. On the
other hand, it... | [
{
"created": "Mon, 6 Nov 2006 14:59:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Apostolatos",
"Theocharis A.",
""
]
] | A binary system, composed of a compact object orbiting around a massive central body, will emit gravitational waves which will depend on the central body's spacetime geometry. We expect that the gravitational wave observables will somehow ``encode'' the information about the spacetime structure. On the other hand, it h... |
1903.10850 | Jeferson de Oliveira | E. Abdalla, B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira,
Eleftherios Papantonopoulos and A. B. Pavan | Instability of Reissner-Nordstr\"om-AdS black hole under perturbations
of a scalar field coupled to Einstein tensor | 18 pages, 6 figures | Phys. Rev. D 99, 104065 (2019) | 10.1103/PhysRevD.99.104065 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the instability of a Reissner-Nordstr\"om-AdS (RNAdS) black hole
under perturbations of a massive scalar field coupled to Einstein tensor.
Calculating the potential of the scalar perturbations we find that as the
strength of the coupling of the scalar to Einstein tensor is increasing, the
potential develops ... | [
{
"created": "Tue, 26 Mar 2019 13:13:59 GMT",
"version": "v1"
}
] | 2019-06-06 | [
[
"Abdalla",
"E.",
""
],
[
"Cuadros-Melgar",
"B.",
""
],
[
"Fontana",
"R. D. B.",
""
],
[
"de Oliveira",
"Jeferson",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Pavan",
"A. B.",
""
]
] | We study the instability of a Reissner-Nordstr\"om-AdS (RNAdS) black hole under perturbations of a massive scalar field coupled to Einstein tensor. Calculating the potential of the scalar perturbations we find that as the strength of the coupling of the scalar to Einstein tensor is increasing, the potential develops a ... |
2304.08877 | Subhra Bhattacharya | Subhra Bhattacharya and Subhasis Nalui | Complexity factor Parametrization for Traversable Wormholes | Accepted for Publication at J. Math. Phys | null | 10.1063/5.0148762 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It is known that static traversable wormhole in Einstein gravity is supported
by matter that violates null energy conditions (NEC). Essentially such wormhole
will be characterised by a central throat with anisotropic matter lining the
throat that violates NEC. This in turn provides viable geometry for the
wormhole to... | [
{
"created": "Tue, 18 Apr 2023 10:10:42 GMT",
"version": "v1"
}
] | 2023-05-17 | [
[
"Bhattacharya",
"Subhra",
""
],
[
"Nalui",
"Subhasis",
""
]
] | It is known that static traversable wormhole in Einstein gravity is supported by matter that violates null energy conditions (NEC). Essentially such wormhole will be characterised by a central throat with anisotropic matter lining the throat that violates NEC. This in turn provides viable geometry for the wormhole to s... |
1705.05244 | Olivier Minazzoli | Olivier Minazzoli, L\'eo Bernus, Agn\`es Fienga, Aur\'elien Hees,
Jacques Laskar, Vishnu Viswanathan | Universality of free fall versus ephemeris | To appear in the Proceedings of the 52th Rencontres de Moriond. 4
pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When a light scalar field with gravitational strength interacts with matter,
the weak equivalence principle is in general violated, leading for instance to
a violation of the universality of free fall. This has been known and tested
for a while. However, recent developments [Minazzoli & Hees, PRD 2016] showed
that a ... | [
{
"created": "Mon, 15 May 2017 15:42:28 GMT",
"version": "v1"
}
] | 2017-05-16 | [
[
"Minazzoli",
"Olivier",
""
],
[
"Bernus",
"Léo",
""
],
[
"Fienga",
"Agnès",
""
],
[
"Hees",
"Aurélien",
""
],
[
"Laskar",
"Jacques",
""
],
[
"Viswanathan",
"Vishnu",
""
]
] | When a light scalar field with gravitational strength interacts with matter, the weak equivalence principle is in general violated, leading for instance to a violation of the universality of free fall. This has been known and tested for a while. However, recent developments [Minazzoli & Hees, PRD 2016] showed that a no... |
1006.5088 | Edward Green | Dave Pandres, Jr | Gravitational and electroweak unification by replacing diffeomorphisms
with larger group | 28 pages, | Gen.Rel.Grav.41:2501-2528,2009 | 10.1007/s10714-009-0788-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The covariance group for general relativity, the diffeomorphisms, is replaced
by a group of coordinate transformations which contains the diffeomorphisms as
a proper subgroup. The larger group is defined by the assumption that all
observers will agree whether any given quantity is conserved. Alternatively,
and equiva... | [
{
"created": "Sat, 26 Jun 2010 01:05:27 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Pandres,",
"Dave",
"Jr"
]
] | The covariance group for general relativity, the diffeomorphisms, is replaced by a group of coordinate transformations which contains the diffeomorphisms as a proper subgroup. The larger group is defined by the assumption that all observers will agree whether any given quantity is conserved. Alternatively, and equivale... |
1902.03869 | Andre Fuzfa | A. F\"uzfa | Interstellar travels aboard radiation-powered rockets | 18 pages, 11 figures ; Open Access | Phys. Rev. D 99, 104081 (2019) | 10.1103/PhysRevD.99.104081 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We model accelerated trips at high-velocity aboard light sails (beam-powered
propulsion in general) and radiation rockets (thrust by anisotropic emission of
radiation) in terms of Kinnersley's solution of general relativity and its
associated geodesics. The analysis of radiation rockets relativistic kinematics
shows ... | [
{
"created": "Mon, 11 Feb 2019 13:37:32 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2019 19:37:43 GMT",
"version": "v2"
}
] | 2019-06-05 | [
[
"Füzfa",
"A.",
""
]
] | We model accelerated trips at high-velocity aboard light sails (beam-powered propulsion in general) and radiation rockets (thrust by anisotropic emission of radiation) in terms of Kinnersley's solution of general relativity and its associated geodesics. The analysis of radiation rockets relativistic kinematics shows th... |
0706.2543 | Tolga Birkandan | T. Birkandan, M. Hortacsu | Dirac Equation in the Background of the Nutku Helicoid Metric | 16 pages, 1 figure, TeX file using boxedeps. Replaced by the revised
version | J.Math.Phys.48:092301,2007 | 10.1063/1.2785124 | null | gr-qc math-ph math.MP | null | We study the solutions of the Dirac equation in the background of the Nutku
helicoid metric. This metric has curvature singularities, which necessitates
imposing a boundary to exclude this point. We use the Atiyah-Patodi-Singer non
local spectral boundary conditions for both the four and the five dimensional
manifold... | [
{
"created": "Mon, 18 Jun 2007 07:56:46 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Sep 2007 06:50:04 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Birkandan",
"T.",
""
],
[
"Hortacsu",
"M.",
""
]
] | We study the solutions of the Dirac equation in the background of the Nutku helicoid metric. This metric has curvature singularities, which necessitates imposing a boundary to exclude this point. We use the Atiyah-Patodi-Singer non local spectral boundary conditions for both the four and the five dimensional manifolds. |
1501.06540 | Christian Boehmer | Christian G. Boehmer, Nicola Tamanini, Matthew Wright | Interacting quintessence from a variational approach Part I: algebraic
couplings | 29 pages, 12 figures; updated and slightly extended, matches
published version | Phys. Rev. D 91, 123002 (2015) | 10.1103/PhysRevD.91.123002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new approach to build models of quintessence interacting with
dark or baryonic matter. We use a variational approach for relativistic fluids
to realize an effective description of matter fields at the Lagrangian level.
The coupling is introduced directly in the action by considering a single
function mix... | [
{
"created": "Mon, 26 Jan 2015 19:48:28 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2015 11:10:38 GMT",
"version": "v2"
}
] | 2015-06-10 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Tamanini",
"Nicola",
""
],
[
"Wright",
"Matthew",
""
]
] | We present a new approach to build models of quintessence interacting with dark or baryonic matter. We use a variational approach for relativistic fluids to realize an effective description of matter fields at the Lagrangian level. The coupling is introduced directly in the action by considering a single function mixin... |
2009.03003 | Tobias Mistele | Tobias Mistele | Three problems of superfluid dark matter and their solution | 34 pages, 5 figures, published version | JCAP 2101 (2021) 025 | 10.1088/1475-7516/2021/01/025 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In superfluid dark matter (SFDM), the phonon field plays a double role: It
carries the superfluid's energy density and it mediates the MOND-like phonon
force. We show that these two roles are in tension with each other on galactic
scales: A MOND-like phonon force is in tension with a superfluid in equilibrium
and wit... | [
{
"created": "Mon, 7 Sep 2020 10:37:17 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2020 10:59:46 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Jan 2021 11:43:40 GMT",
"version": "v3"
}
] | 2021-01-18 | [
[
"Mistele",
"Tobias",
""
]
] | In superfluid dark matter (SFDM), the phonon field plays a double role: It carries the superfluid's energy density and it mediates the MOND-like phonon force. We show that these two roles are in tension with each other on galactic scales: A MOND-like phonon force is in tension with a superfluid in equilibrium and with ... |
1603.06983 | Mariam Bouhmadi-Lopez | Mariam Bouhmadi-L\'opez, Jo\~ao Morais, Alexander Zhuk | The late Universe with non-linear interaction in the dark sector: the
coincidence problem | 24 pages, no figures. Conclusions extended and references updated.
Version accepted in Physics of the Dark Universe | Phys.Dark Univ. 14 (2016) 11-20 | 10.1016/j.dark.2016.08.001 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Universe at the late stage of its evolution and deep inside the
cell of uniformity. At such a scale the Universe is highly inhomogeneous and
filled with discretely distributed inhomogeneities in the form of galaxies and
groups of galaxies. As a matter source, we consider dark matter (DM) and dark
energy ... | [
{
"created": "Tue, 22 Mar 2016 21:06:08 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jul 2016 11:09:42 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Aug 2016 13:22:42 GMT",
"version": "v3"
}
] | 2016-08-25 | [
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Morais",
"João",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We study the Universe at the late stage of its evolution and deep inside the cell of uniformity. At such a scale the Universe is highly inhomogeneous and filled with discretely distributed inhomogeneities in the form of galaxies and groups of galaxies. As a matter source, we consider dark matter (DM) and dark energy (D... |
gr-qc/0610040 | Bogusz Kinasiewicz | Bogusz Kinasiewicz, Patryk Mach | From polytropic to barotropic perfect fluids in general-relativistic
hydrodynamics | 22 pages. To appear in Acta Phys. Pol. B | Acta Phys.Polon. B38 (2007) 39-60 | null | null | gr-qc | null | Two general-relativistic hydrodynamical models are considered: a model of
self-gravitating static configurations of perfect fluid and a model of steady
accretion of fluid onto a black hole. We generalise analytic results obtained
for the original polytropic versions of these models onto a wider class of
barotropic eq... | [
{
"created": "Tue, 10 Oct 2006 06:56:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kinasiewicz",
"Bogusz",
""
],
[
"Mach",
"Patryk",
""
]
] | Two general-relativistic hydrodynamical models are considered: a model of self-gravitating static configurations of perfect fluid and a model of steady accretion of fluid onto a black hole. We generalise analytic results obtained for the original polytropic versions of these models onto a wider class of barotropic equa... |
1408.6375 | Vladimir Khatsymovsky | V.M. Khatsymovsky | Some minisuperspace model for the Faddeev formulation of gravity | 14 pages, 3 figures, to appear in Mod. Phys. Lett. A | Mod. Phys. Lett. A, Vol. 29, No. 27 (2014) 1450141 | 10.1142/S0217732314501417 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Faddeev formulation of general relativity in which the metric is
composed of ten vector fields or a $4 \times 10$ tetrad. This formulation
reduces to the usual general relativity upon partial use of the field
equations.
A distinctive feature of the Faddeev action is its finiteness on the
discontinuous f... | [
{
"created": "Wed, 27 Aug 2014 10:19:39 GMT",
"version": "v1"
}
] | 2014-08-29 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We consider Faddeev formulation of general relativity in which the metric is composed of ten vector fields or a $4 \times 10$ tetrad. This formulation reduces to the usual general relativity upon partial use of the field equations. A distinctive feature of the Faddeev action is its finiteness on the discontinuous field... |
2407.06270 | William Lamb | William G. Lamb, Stephen R. Taylor | Spectral Variance in a Stochastic Gravitational-Wave Background From a
Binary Population | 8 pages, 3 figures. Published in ApJL | ApJL 971 L10 (2024) | 10.3847/2041-8213/ad654a | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | A population of compact object binaries emitting gravitational waves that are
not individually resolvable will form a stochastic gravitational wave signal.
While the expected spectrum over population realizations is well known from
Phinney (2001), its higher order moments have not been fully studied before or
compute... | [
{
"created": "Mon, 8 Jul 2024 18:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2024 15:19:00 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Aug 2024 16:22:31 GMT",
"version": "v3"
}
] | 2024-08-06 | [
[
"Lamb",
"William G.",
""
],
[
"Taylor",
"Stephen R.",
""
]
] | A population of compact object binaries emitting gravitational waves that are not individually resolvable will form a stochastic gravitational wave signal. While the expected spectrum over population realizations is well known from Phinney (2001), its higher order moments have not been fully studied before or computed ... |
2211.11868 | Armin Van De Venn | Armin van de Venn, David Vasak, Johannes Kirsch, J\"urgen Struckmeier | Torsional dark energy in quadratic gauge gravity | 11 pages, 3 figures; updated to published version | Eur. Phys. J. C 83, 288 (2023) | 10.1140/epjc/s10052-023-11397-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Covariant Canonical Gauge theory of Gravity (CCGG) is a gauge field
formulation of gravity which a priori includes non-metricity and torsion. It
extends the Lagrangian of Einstein's theory of general relativity by terms at
least quadratic in the Riemann-Cartan tensor. This paper investigates the
implications of m... | [
{
"created": "Mon, 21 Nov 2022 21:42:27 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Nov 2022 13:39:00 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Apr 2023 11:08:42 GMT",
"version": "v3"
}
] | 2023-04-13 | [
[
"van de Venn",
"Armin",
""
],
[
"Vasak",
"David",
""
],
[
"Kirsch",
"Johannes",
""
],
[
"Struckmeier",
"Jürgen",
""
]
] | The Covariant Canonical Gauge theory of Gravity (CCGG) is a gauge field formulation of gravity which a priori includes non-metricity and torsion. It extends the Lagrangian of Einstein's theory of general relativity by terms at least quadratic in the Riemann-Cartan tensor. This paper investigates the implications of met... |
gr-qc/9405003 | Arthur Wasserman | J. A. Smoller and A. G. Wasserman | Limiting Behavior of Solutions to the Einstein-Yang/Mills Equations | 2 pages, um5941 | Physica D93:123-136,1996 | 10.1016/0167-2789(95)00291-X | null | gr-qc | null | The ADM masses of particle-like solutions to the Einstein-Yang/Mills
Equations tend to 2 as the number of nodes of the solutions increases. The same
result is true for black hole solutions with event horizon less than 1. For
event horizon $\rho > 1$ the ADM masses converge to $\rho + \rho^{-1} .$ These
statements ext... | [
{
"created": "Mon, 2 May 1994 15:41:35 GMT",
"version": "v1"
}
] | 2015-08-28 | [
[
"Smoller",
"J. A.",
""
],
[
"Wasserman",
"A. G.",
""
]
] | The ADM masses of particle-like solutions to the Einstein-Yang/Mills Equations tend to 2 as the number of nodes of the solutions increases. The same result is true for black hole solutions with event horizon less than 1. For event horizon $\rho > 1$ the ADM masses converge to $\rho + \rho^{-1} .$ These statements exten... |
2202.02229 | Farook Rahaman | Mofazzal Azam, M Sami and Farook Rahaman | A note on shock wave in the dark matter medium | 4 pages. Submitted in Phys.Lett.B on 25.11.21 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Employing Newton's stellar balance equation and using the flat rotation
velocity of satellite galaxies, we have found the velocity of sound in the dark
matter medium. What is interesting is that the velocity of satellite galaxies
is very much larger than the velocity of sound in the dark matter medium. This
indicates... | [
{
"created": "Wed, 2 Feb 2022 19:42:03 GMT",
"version": "v1"
}
] | 2022-02-07 | [
[
"Azam",
"Mofazzal",
""
],
[
"Sami",
"M",
""
],
[
"Rahaman",
"Farook",
""
]
] | Employing Newton's stellar balance equation and using the flat rotation velocity of satellite galaxies, we have found the velocity of sound in the dark matter medium. What is interesting is that the velocity of satellite galaxies is very much larger than the velocity of sound in the dark matter medium. This indicates t... |
1305.6933 | Yi-Zen Chu | Yi-Zen Chu | A Line Source In Minkowski For The de Sitter Spacetime Scalar Green's
Function: Massless Minimally Coupled Case | 27 pages, 1 figure. v3: The 1/N_0 and the sum over eigenvectors in
the general formula, eq. (9), is not needed; results are otherwise unaltered.
v4: Abstract, introduction and justification of general formula (eq. (9)) are
revised, thanks to referee's input | null | 10.1063/1.4895506 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the desire to understand the causal structure of physical
signals produced in curved spacetimes -- particularly around black holes -- we
show how, for certain classes of geometries, one might obtain its retarded or
advanced minimally coupled massless scalar Green's function by using the
corresponding Gre... | [
{
"created": "Wed, 29 May 2013 20:00:13 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jun 2013 20:00:02 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Oct 2013 19:39:14 GMT",
"version": "v3"
},
{
"created": "Fri, 5 Sep 2014 04:21:24 GMT",
"version": "v4"
}
] | 2015-06-16 | [
[
"Chu",
"Yi-Zen",
""
]
] | Motivated by the desire to understand the causal structure of physical signals produced in curved spacetimes -- particularly around black holes -- we show how, for certain classes of geometries, one might obtain its retarded or advanced minimally coupled massless scalar Green's function by using the corresponding Green... |
gr-qc/0301083 | Gaetano Vilasi | F. Canfora and G. Vilasi | Spin-1 gravitational waves and their natural sources | 10 pages, latex | Phys.Lett. B585 (2004) 193-199 | 10.1016/j.physletb.2004.02.005 | null | gr-qc hep-th | null | Non-vacuum exact gravitational waves invariant for a non Abelian
two-dimensional Lie algebra generated by two Killing fields whose commutator is
of light type, are described. The polarization of these waves, already known
from previous works, is related to the sources. Non vacuum exact gravitational
waves admitting o... | [
{
"created": "Wed, 22 Jan 2003 09:07:31 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Feb 2004 21:00:12 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Canfora",
"F.",
""
],
[
"Vilasi",
"G.",
""
]
] | Non-vacuum exact gravitational waves invariant for a non Abelian two-dimensional Lie algebra generated by two Killing fields whose commutator is of light type, are described. The polarization of these waves, already known from previous works, is related to the sources. Non vacuum exact gravitational waves admitting onl... |
1908.05697 | Nikita Kolganov | A. O. Barvinsky and N. Kolganov | Inflation in generalized unimodular gravity | 13 pages, no figures | Phys. Rev. D 100, 123510 (2019) | 10.1103/PhysRevD.100.123510 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently suggested generalized unimodular gravity theory, which was
originally put forward as a model of dark energy, can serve as a model of
cosmological inflation driven by the effective perfect fluid -- the dark purely
gravitational sector of the theory. Its excitations are scalar gravitons which
can generate,... | [
{
"created": "Thu, 15 Aug 2019 18:14:42 GMT",
"version": "v1"
}
] | 2019-12-11 | [
[
"Barvinsky",
"A. O.",
""
],
[
"Kolganov",
"N.",
""
]
] | The recently suggested generalized unimodular gravity theory, which was originally put forward as a model of dark energy, can serve as a model of cosmological inflation driven by the effective perfect fluid -- the dark purely gravitational sector of the theory. Its excitations are scalar gravitons which can generate, i... |
2006.08970 | Yuta Michimura Dr. | Yuta Michimura, Kentaro Komori, Yutaro Enomoto, Koji Nagano, Atsushi
Nishizawa, Eiichi Hirose, Matteo Leonardi, Eleonora Capocasa, Naoki Aritomi,
Yuhang Zhao, Raffaele Flaminio, Takafumi Ushiba, Tomohiro Yamada, Li-Wei Wei,
Hiroki Takeda, Satoshi Tanioka, Masaki Ando, Kazuhiro Yamamoto, Kazuhiro
Hayama, Sadakaz... | Prospects for improving the sensitivity of the cryogenic gravitational
wave detector KAGRA | 10 pages, 2 figures | Phys. Rev. D 102, 022008 (2020) | 10.1103/PhysRevD.102.022008 | JGW-P2011740 | gr-qc astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Upgrades to improve the sensitivity of gravitational wave detectors enable
more frequent detections and more precise source parameter estimation. Unlike
other advanced interferometric detectors such as Advanced LIGO and Advanced
Virgo, KAGRA requires different approach for the upgrade since it is the only
detector wh... | [
{
"created": "Tue, 16 Jun 2020 07:54:48 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jul 2020 22:30:23 GMT",
"version": "v2"
}
] | 2020-07-28 | [
[
"Michimura",
"Yuta",
""
],
[
"Komori",
"Kentaro",
""
],
[
"Enomoto",
"Yutaro",
""
],
[
"Nagano",
"Koji",
""
],
[
"Nishizawa",
"Atsushi",
""
],
[
"Hirose",
"Eiichi",
""
],
[
"Leonardi",
"Matteo",
""
],
[... | Upgrades to improve the sensitivity of gravitational wave detectors enable more frequent detections and more precise source parameter estimation. Unlike other advanced interferometric detectors such as Advanced LIGO and Advanced Virgo, KAGRA requires different approach for the upgrade since it is the only detector whic... |
gr-qc/0608057 | Rolando Gaitan Deveras RGD | Rolando Gaitan and Frank Vera | GL(3,R) gauge theory of gravity coupled with an electromagnetic field | 5 pages, to appear in CIENCIA | null | null | null | gr-qc | null | Consistency of $GL(3,R)$ gauge theory of gravity coupled with an external
electromagnetic field, is studied. It is shown that possible restrictions on
Maxwell field can be avoided through introduction of auxiliary fields.
| [
{
"created": "Fri, 11 Aug 2006 00:56:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gaitan",
"Rolando",
""
],
[
"Vera",
"Frank",
""
]
] | Consistency of $GL(3,R)$ gauge theory of gravity coupled with an external electromagnetic field, is studied. It is shown that possible restrictions on Maxwell field can be avoided through introduction of auxiliary fields. |
1310.7395 | Bernard S. Kay | Bernard S. Kay (York) | Instability of enclosed horizons | 28 pages, 4 figures. Exposition improved. Paper now divided into
sections with endnotes in a separate section. Abstract rewritten, more
discussion, references added, typos corrected | General Relativity and Gravitation 47, 31 (2015) | 10.1007/s10714-015-1858-8 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that there are solutions to the scalar wave equation on 1+1
dimensional Minkowski space with finite energy tails which, if they reflect off
a uniformly accelerated mirror due to (say) Dirichlet boundary conditions on
it, develop an infinite stress-energy tensor on the mirror's Rindler horizon.
We also sh... | [
{
"created": "Mon, 28 Oct 2013 12:06:56 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Oct 2013 01:44:47 GMT",
"version": "v2"
},
{
"created": "Thu, 22 May 2014 15:28:18 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Jan 2015 14:50:42 GMT",
"version": "v4"
}
] | 2015-04-06 | [
[
"Kay",
"Bernard S.",
"",
"York"
]
] | We point out that there are solutions to the scalar wave equation on 1+1 dimensional Minkowski space with finite energy tails which, if they reflect off a uniformly accelerated mirror due to (say) Dirichlet boundary conditions on it, develop an infinite stress-energy tensor on the mirror's Rindler horizon. We also show... |
gr-qc/0503118 | I.-Ching Yang | I-Ching Yang and Chia-Hsiu Tsai | The Evaluation of the M{\o}ller Energy Complex in Difference Coordinate
Representations | 8 pages | null | null | null | gr-qc | null | The M{\o}ller energy complex of Schwarzschild black hole solution in several
coodinates are evaluated. Our results show that the M{\o}ller energy complex is
independent of not only the purely spatial transformation, but also the shift
of time coordinate. So, we could conclude that a shift of time coordinates will
not... | [
{
"created": "Wed, 30 Mar 2005 14:17:12 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 2005 10:56:10 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Yang",
"I-Ching",
""
],
[
"Tsai",
"Chia-Hsiu",
""
]
] | The M{\o}ller energy complex of Schwarzschild black hole solution in several coodinates are evaluated. Our results show that the M{\o}ller energy complex is independent of not only the purely spatial transformation, but also the shift of time coordinate. So, we could conclude that a shift of time coordinates will not c... |
gr-qc/0512032 | Willians Barreto | L. Herrera, A. Di Prisco and W. Barreto | Thermo--inertial bouncing of a relativistic collapsing sphere: A
numerical model | 14 pages, 6 figures. To appear in Phys. Rev. D | Phys.Rev. D73 (2006) 024008 | 10.1103/PhysRevD.73.024008 | null | gr-qc astro-ph | null | We present a numerical model of a collapsing radiating sphere, whose boundary
surface undergoes bouncing due to a decreasing of its inertial mass density
(and, as expected from the equivalence principle, also of the ``gravitational''
force term) produced by the ``inertial'' term of the transport equation. This
model ... | [
{
"created": "Mon, 5 Dec 2005 22:09:19 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Barreto",
"W.",
""
]
] | We present a numerical model of a collapsing radiating sphere, whose boundary surface undergoes bouncing due to a decreasing of its inertial mass density (and, as expected from the equivalence principle, also of the ``gravitational'' force term) produced by the ``inertial'' term of the transport equation. This model ex... |
gr-qc/9807040 | Kerstin Kunze | John D. Barrow, Kerstin E. Kunze | String Cosmology | 12 pages, Latex. Invited paper to appear in the special issue of the
Journal of Chaos, Solitons and Fractals on "Superstrings, M, F, S... Theory",
eds. C. Castro and M.S. El Naschie | Chaos Solitons Fractals 10:257,1999 | 10.1016/S0960-0779(98)00183-0 | SUSSEX-AST 98/7-1 | gr-qc astro-ph | null | An overview is given of the formulation of low-energy string cosmologies
together with examples of particular solutions, successes and problems of the
theory.
| [
{
"created": "Thu, 16 Jul 1998 12:01:51 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Barrow",
"John D.",
""
],
[
"Kunze",
"Kerstin E.",
""
]
] | An overview is given of the formulation of low-energy string cosmologies together with examples of particular solutions, successes and problems of the theory. |
gr-qc/0504045 | Sijie Gao | Sijie Gao and Jose' P. S. Lemos | The Tolman-Bondi--Vaidya Spacetime: matching timelike dust to null dust | 5 pages, no figure | Phys.Rev. D71 (2005) 084022 | 10.1103/PhysRevD.71.084022 | null | gr-qc | null | The Tolman-Bondi and Vaidya solutions are two solutions to Einstein equations
which describe dust particles and null fluid, respectively. We show that it is
possible to match the two solutions in one single spacetime, the
Tolman-Bondi--Vaidya spacetime. The new spacetime is divided by a null surface
with Tolman-Bondi... | [
{
"created": "Mon, 11 Apr 2005 18:34:09 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gao",
"Sijie",
""
],
[
"Lemos",
"Jose' P. S.",
""
]
] | The Tolman-Bondi and Vaidya solutions are two solutions to Einstein equations which describe dust particles and null fluid, respectively. We show that it is possible to match the two solutions in one single spacetime, the Tolman-Bondi--Vaidya spacetime. The new spacetime is divided by a null surface with Tolman-Bondi d... |
1207.5601 | David A. Craig | David A. Craig | Dynamical eigenfunctions and critical density in loop quantum cosmology | 23 pages, 8 figures. Minor corrections throughout. Significant
improvement to key figure illustrating behavior of the eigenfunctions.
Version to appear in Classical and Quantum Gravity | Class. Quantum Grav. 30 (2013) 035010 | 10.1088/0264-9381/30/3/035010 | PI-QG-250 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We offer a new, physically transparent argument for the existence of the
critical, universal maximum matter density in loop quantum cosmology for the
case of a flat Friedmann-Lemaitre-Robertson-Walker cosmology with scalar
matter. The argument is based on the existence of a sharp exponential
ultraviolet cutoff in mom... | [
{
"created": "Tue, 24 Jul 2012 07:09:53 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Aug 2012 03:12:33 GMT",
"version": "v2"
},
{
"created": "Mon, 31 Dec 2012 08:06:11 GMT",
"version": "v3"
}
] | 2013-01-23 | [
[
"Craig",
"David A.",
""
]
] | We offer a new, physically transparent argument for the existence of the critical, universal maximum matter density in loop quantum cosmology for the case of a flat Friedmann-Lemaitre-Robertson-Walker cosmology with scalar matter. The argument is based on the existence of a sharp exponential ultraviolet cutoff in momen... |
1910.10580 | William Wolf | William J. Wolf and Macarena Lagos | Standard Sirens as a novel probe of dark energy | Updated to published version | Phys. Rev. Lett. 124, 061101 (2020) | 10.1103/PhysRevLett.124.061101 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological models with a dynamical dark energy field typically lead to a
modified propagation of gravitational waves via an effectively time-varying
gravitational coupling $G(t)$. The local variation of this coupling between the
time of emission and detection can be probed with standard sirens. Here we
discuss the ... | [
{
"created": "Wed, 23 Oct 2019 14:28:46 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2019 01:18:09 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Feb 2020 00:28:20 GMT",
"version": "v3"
}
] | 2020-02-19 | [
[
"Wolf",
"William J.",
""
],
[
"Lagos",
"Macarena",
""
]
] | Cosmological models with a dynamical dark energy field typically lead to a modified propagation of gravitational waves via an effectively time-varying gravitational coupling $G(t)$. The local variation of this coupling between the time of emission and detection can be probed with standard sirens. Here we discuss the ro... |
1307.6232 | Yi Pan | Yi Pan, Alessandra Buonanno, Andrea Taracchini, Lawrence E. Kidder,
Abdul H. Mroue, Harald P. Pfeiffer, Mark A. Scheel, and Bela Szilagyi | Inspiral-merger-ringdown waveforms of spinning, precessing black-hole
binaries in the effective-one-body formalism | 17 pages, 10 figures | Phys. Rev. D 89, 084006 (2014) | 10.1103/PhysRevD.89.084006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a general procedure to generate spinning, precessing waveforms
that include inspiral, merger and ringdown stages in the effective-one-body
(EOB) approach. The procedure uses a precessing frame in which
precession-induced amplitude and phase modulations are minimized, and an
inertial frame, aligned with th... | [
{
"created": "Tue, 23 Jul 2013 20:15:16 GMT",
"version": "v1"
}
] | 2014-04-23 | [
[
"Pan",
"Yi",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Taracchini",
"Andrea",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Mroue",
"Abdul H.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Scheel",
"Mark A.",
""
... | We describe a general procedure to generate spinning, precessing waveforms that include inspiral, merger and ringdown stages in the effective-one-body (EOB) approach. The procedure uses a precessing frame in which precession-induced amplitude and phase modulations are minimized, and an inertial frame, aligned with the ... |
2205.15950 | Matt Visser | Sebastian Schuster (Charles University of Prague), Jessica Santiago
(Aristotle University of Thessaloniki), and Matt Visser (Victoria University
of Wellington) | ADM mass in warp drive spacetimes | V1:19 pages; V2: 22 pages. Authors re-ordered, abstract rewritten; 4
references added; improved presentation and discussion; calculations
unaltered; physics conclusions unaltered | null | 10.1007/s10714-022-03061-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | What happens when a warp bubble has mass? This seemingly innocent question
forces one to carefully formalize exactly what one means by a warp bubble,
exactly what one means by having the warp bubble "move" with respect to the
fixed stars, and forces one to more carefully examine the notion of mass in
warp-drive space... | [
{
"created": "Tue, 31 May 2022 16:48:04 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Aug 2022 09:13:52 GMT",
"version": "v2"
}
] | 2023-01-18 | [
[
"Schuster",
"Sebastian",
"",
"Charles University of Prague"
],
[
"Santiago",
"Jessica",
"",
"Aristotle University of Thessaloniki"
],
[
"Visser",
"Matt",
"",
"Victoria University\n of Wellington"
]
] | What happens when a warp bubble has mass? This seemingly innocent question forces one to carefully formalize exactly what one means by a warp bubble, exactly what one means by having the warp bubble "move" with respect to the fixed stars, and forces one to more carefully examine the notion of mass in warp-drive spaceti... |
gr-qc/0702057 | Filipe Mena | Filipe C. Mena (Minho) and Paul Tod (Oxford) | Lanczos potentials and a definition of gravitational entropy for
perturbed FLRW space-times | 16 pages, submitted for publication in Classical and Quantum Gravity | Class.Quant.Grav.24:1733-1746,2007 | 10.1088/0264-9381/24/7/004 | null | gr-qc | null | We give a prescription for constructing a Lanczos potential for a
cosmological model which is a purely gravitational perturbation of a
Friedman-Lemaitre-Robertson-Walker space-time. For the radiation equation of
state, we find the Lanczos potential explicitly via Fourier transforms. As an
application, we follow up a ... | [
{
"created": "Fri, 9 Feb 2007 20:44:08 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mena",
"Filipe C.",
"",
"Minho"
],
[
"Tod",
"Paul",
"",
"Oxford"
]
] | We give a prescription for constructing a Lanczos potential for a cosmological model which is a purely gravitational perturbation of a Friedman-Lemaitre-Robertson-Walker space-time. For the radiation equation of state, we find the Lanczos potential explicitly via Fourier transforms. As an application, we follow up a su... |
1506.02145 | Gonzalo Olmo | Gonzalo J. Olmo, D. Rubiera-Garcia, and A. Sanchez-Puente | Geometric aspects of charged black holes in Palatini theories | 6 pages. Proceedings of the conference "Spanish Relativity Meeting -
ERE2014", held in Valencia (Spain) | J.Phys.Conf.Ser. 600 (2015) 1, 012042 | 10.1088/1742-6596/600/1/012042 | IFIC/15-55 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Charged black holes in gravity theories in the Palatini formalism present a
number of unique properties. Their innermost structure is topologically
nontrivial, representing a wormhole supported by a sourceless electric flux.
For certain values of their effective mass and charge curvature divergences may
be absent, an... | [
{
"created": "Sat, 6 Jun 2015 12:41:26 GMT",
"version": "v1"
}
] | 2015-07-31 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
],
[
"Sanchez-Puente",
"A.",
""
]
] | Charged black holes in gravity theories in the Palatini formalism present a number of unique properties. Their innermost structure is topologically nontrivial, representing a wormhole supported by a sourceless electric flux. For certain values of their effective mass and charge curvature divergences may be absent, and ... |
2106.10303 | Zhu Yi | Zhu Yi and Zong-Hong Zhu | Inflationary attractors from a non-canonical kinetic term | 13 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show explicitly how the T-model, E-model, and Hilltop inflations are
obtained from the inflation models with a non-canonical kinetic term and an
arbitrary potential. By this method, any attractor of observables $n_s$ and $r$
is possible. The presence of attractors poses a challenge to differentiate
inflation model... | [
{
"created": "Fri, 18 Jun 2021 18:20:54 GMT",
"version": "v1"
}
] | 2021-06-22 | [
[
"Yi",
"Zhu",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | We show explicitly how the T-model, E-model, and Hilltop inflations are obtained from the inflation models with a non-canonical kinetic term and an arbitrary potential. By this method, any attractor of observables $n_s$ and $r$ is possible. The presence of attractors poses a challenge to differentiate inflation models. |
gr-qc/9312019 | Fonarev Oleg | Oleg A. Fonarev | Quantum Kinetic Equations and Cosmology | 10 pages | null | 10.1016/0375-9601(94)90361-1 | null | gr-qc astro-ph | null | We analyse quantum--kinetic effects in the early Universe. We show that
quantum corrections to the Vlasov equation give rise to a dynamical variation
of the gravitational constant. The value of the gravitational constant at the
Grand Unification epoch is shown to differ from its present value to about
$10^{-4} \div 1... | [
{
"created": "Sat, 11 Dec 1993 12:38:52 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Fonarev",
"Oleg A.",
""
]
] | We analyse quantum--kinetic effects in the early Universe. We show that quantum corrections to the Vlasov equation give rise to a dynamical variation of the gravitational constant. The value of the gravitational constant at the Grand Unification epoch is shown to differ from its present value to about $10^{-4} \div 10^... |
1504.05033 | Sergey Chervon | Aleksey Nikolaev and Sergey Chervon | Development of Zeldovich's approach for cosmological distances
measurement in the Friedmann Universe | 9 pages, 2 figures, comment is added | Eur. Phys. J. C (2015) 75:411 | 10.1140/epjc/s10052-015-3614-3 | LGCA 2015/4 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present our development of Zeldovich's ideas for the measurement of the
cosmological angular diameter distance (ADD) in the Friedmann Universe. We
derive the general differential equation for the ADD measurement which is valid
for an open, spatially-flat and closed universe, and for any stress energy
tensor. We so... | [
{
"created": "Mon, 20 Apr 2015 12:34:47 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2016 13:15:42 GMT",
"version": "v2"
}
] | 2016-04-08 | [
[
"Nikolaev",
"Aleksey",
""
],
[
"Chervon",
"Sergey",
""
]
] | We present our development of Zeldovich's ideas for the measurement of the cosmological angular diameter distance (ADD) in the Friedmann Universe. We derive the general differential equation for the ADD measurement which is valid for an open, spatially-flat and closed universe, and for any stress energy tensor. We solv... |
2103.03925 | Yiqi Xie | Yiqi Xie, Jun Zhang, Hector O. Silva, Claudia de Rham, Helvi Witek,
Nicolas Yunes | Square Peg in a Circular Hole: Choosing the Right Ansatz for Isolated
Black Holes in Generic Gravitational Theories | 7+5 pages, 1 figure, text and references updated, v2 matches version
published in PRL | Phys. Rev. Lett. 126, 241104 (2021) | 10.1103/PhysRevLett.126.241104 | Imperial/TP/2021/CdR/01 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The metric of a spacetime can be greatly simplified if the spacetime is
circular. We prove that in generic effective theories of gravity, the spacetime
of a stationary, axisymmetric and asymptotically flat solution must be circular
if the solution can be obtained perturbatively from a solution in the general
relativi... | [
{
"created": "Fri, 5 Mar 2021 20:17:40 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jun 2021 22:09:47 GMT",
"version": "v2"
}
] | 2021-06-22 | [
[
"Xie",
"Yiqi",
""
],
[
"Zhang",
"Jun",
""
],
[
"Silva",
"Hector O.",
""
],
[
"de Rham",
"Claudia",
""
],
[
"Witek",
"Helvi",
""
],
[
"Yunes",
"Nicolas",
""
]
] | The metric of a spacetime can be greatly simplified if the spacetime is circular. We prove that in generic effective theories of gravity, the spacetime of a stationary, axisymmetric and asymptotically flat solution must be circular if the solution can be obtained perturbatively from a solution in the general relativity... |
2303.02103 | Adri\'an Casado-Turri\'on | Adri\'an Casado-Turri\'on, \'Alvaro de la Cruz-Dombriz, Antonio Dobado | Physical non-viability of a wide class of $f(R)$ models and their
constant-curvature solutions | 20 pages, 1 table, no figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Constant-curvature solutions lie at the very core of gravitational physics,
with Schwarzschild and (Anti)-de Sitter being two of the most paradigmatic
examples. Although such kind of solutions are very well-known in General
Relativity, that is not the case for theories of gravity beyond the Einsteinian
paradigm. In t... | [
{
"created": "Fri, 3 Mar 2023 17:40:20 GMT",
"version": "v1"
}
] | 2023-03-06 | [
[
"Casado-Turrión",
"Adrián",
""
],
[
"de la Cruz-Dombriz",
"Álvaro",
""
],
[
"Dobado",
"Antonio",
""
]
] | Constant-curvature solutions lie at the very core of gravitational physics, with Schwarzschild and (Anti)-de Sitter being two of the most paradigmatic examples. Although such kind of solutions are very well-known in General Relativity, that is not the case for theories of gravity beyond the Einsteinian paradigm. In thi... |
1901.09098 | Valeriy I. Sbitnev | Valeriy I. Sbitnev | Quaternion algebra on 4D superfluid quantum space-time. Gravitomagnetism | 38 pages,15 figures. It will be printed in Foundations of Physics.
This matherial was reported on 4th International Conference on High Energy &
Particle Physics, Valencia, Spain | Foundations of Physics, 49(2), 107-143, 2019 | 10.1007/s10701-019-00236-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitomagnetic equations result from applying quaternionic differential
operators to the energy-momentum tensor. These equations are similar to the
Maxwell's EM equations. Both sets of the equations are isomorphic after
changing orientation of either the gravitomagnetic orbital force or the
magnetic induction. The g... | [
{
"created": "Mon, 21 Jan 2019 12:44:00 GMT",
"version": "v1"
}
] | 2019-02-21 | [
[
"Sbitnev",
"Valeriy I.",
""
]
] | Gravitomagnetic equations result from applying quaternionic differential operators to the energy-momentum tensor. These equations are similar to the Maxwell's EM equations. Both sets of the equations are isomorphic after changing orientation of either the gravitomagnetic orbital force or the magnetic induction. The gra... |
1104.4795 | P.A. Gonzalez | P.A. Gonz\'alez and Joel Saavedra | Comments on absorption cross section for Chern-Simons black holes in
five dimensions | 9 pages, 5 figures | null | 10.1142/S0217751X11054036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effects of black hole mass on the absorption cross
section for a massive scalar field propagating in a 5-dimensional topological
Chern-Simons black hole at the low-frequency limit. We consider the two
branches of black hole solutions $(\alpha=\pm 1)$ and we show that, if the mass
of black h... | [
{
"created": "Mon, 25 Apr 2011 20:05:12 GMT",
"version": "v1"
},
{
"created": "Thu, 12 May 2011 13:11:12 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"González",
"P. A.",
""
],
[
"Saavedra",
"Joel",
""
]
] | In this paper we study the effects of black hole mass on the absorption cross section for a massive scalar field propagating in a 5-dimensional topological Chern-Simons black hole at the low-frequency limit. We consider the two branches of black hole solutions $(\alpha=\pm 1)$ and we show that, if the mass of black hol... |
1502.00304 | Arman Taghavi-Chabert | Pawel Nurowski, Arman Taghavi-Chabert | A Goldberg-Sachs theorem in dimension three | 31 pages. v2: minor typographic changes in the bibliography | 2015 Class. Quantum Grav. 32 115009 | 10.1088/0264-9381/32/11/115009 | null | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove a Goldberg-Sachs theorem in dimension three. To be precise, given a
three-dimensional Lorentzian manifold satisfying the topological massive
gravity equations, we provide necessary and sufficient conditions on the
tracefree Ricci tensor for the existence of a null line distribution whose
orthogonal complemen... | [
{
"created": "Sun, 1 Feb 2015 20:24:02 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2015 17:21:43 GMT",
"version": "v2"
}
] | 2015-05-14 | [
[
"Nurowski",
"Pawel",
""
],
[
"Taghavi-Chabert",
"Arman",
""
]
] | We prove a Goldberg-Sachs theorem in dimension three. To be precise, given a three-dimensional Lorentzian manifold satisfying the topological massive gravity equations, we provide necessary and sufficient conditions on the tracefree Ricci tensor for the existence of a null line distribution whose orthogonal complement ... |
2205.10863 | Sobhan Kazempour | Sobhan Kazempour, Amin Rezaei Akbarieh, Hossein Motavalli and Lijing
Shao | Cosmology of Dirac-Born-Infeld dRGT massive gravity | arXiv admin note: text overlap with arXiv:2204.05595 | Phys. Rev. D 106, 023508 (2022) | 10.1103/PhysRevD.106.023508 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We introduce the cosmological analysis of the Dirac-Born-Infeld dRGT massive
gravity theory which is a new extension of de Rham-Gabadadze-Tolley (dRGT)
massive gravity. In this theory, we consider the Dirac-Born-Infeld (DBI) scalar
field which is coupled to the graviton field. Moreover, we perform the
cosmological ba... | [
{
"created": "Sun, 22 May 2022 16:31:59 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jul 2022 08:16:30 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jul 2022 15:03:41 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Jul 2022 08:08:08 GMT",
"version": "v4"
}
] | 2022-07-18 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Akbarieh",
"Amin Rezaei",
""
],
[
"Motavalli",
"Hossein",
""
],
[
"Shao",
"Lijing",
""
]
] | We introduce the cosmological analysis of the Dirac-Born-Infeld dRGT massive gravity theory which is a new extension of de Rham-Gabadadze-Tolley (dRGT) massive gravity. In this theory, we consider the Dirac-Born-Infeld (DBI) scalar field which is coupled to the graviton field. Moreover, we perform the cosmological back... |
1809.05305 | Andrea Geralico | Donato Bini, Andrea Geralico | On the energy content of electromagnetic and gravitational plane waves
through super-energy tensors | 22 pages, 3 figures, iop macros used. Slightly modified version with
respect to the published one: revised quotation of references, new Appendix A
included, typos corrected | Class. Quantum Grav. 35, 165006 (2018) | 10.1088/1361-6382/aad0b0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy content of (exact) electromagnetic and gravitational plane waves
is studied in terms of super-energy tensors (the Bel, Bel-Robinson and the
--less familiar-- Chevreton tensors) and natural observers. Starting from the
case of single waves, the more interesting situation of colliding waves is then
discussed... | [
{
"created": "Fri, 14 Sep 2018 08:54:23 GMT",
"version": "v1"
}
] | 2018-09-17 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | The energy content of (exact) electromagnetic and gravitational plane waves is studied in terms of super-energy tensors (the Bel, Bel-Robinson and the --less familiar-- Chevreton tensors) and natural observers. Starting from the case of single waves, the more interesting situation of colliding waves is then discussed, ... |
2304.02949 | Avik De Dr. | Hamid Shabani, Avik De, and Tee-How Loo | Phase-space analysis of a novel cosmological model in $f(Q)$ theory | Accepted for publication in EPJC | null | 10.1140/epjc/s10052-023-11722-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The vanishing affine connections have been used solely while adopting the
modified $f(Q)$ gravity theory to the cosmology. Consequently, researchers
could not get beyond what is already known in $f(T)$ theory earlier. To
alleviate this problem, in the present manuscript we investigate a recently
proposed construction... | [
{
"created": "Thu, 6 Apr 2023 09:19:45 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jun 2023 06:00:38 GMT",
"version": "v2"
}
] | 2023-07-12 | [
[
"Shabani",
"Hamid",
""
],
[
"De",
"Avik",
""
],
[
"Loo",
"Tee-How",
""
]
] | The vanishing affine connections have been used solely while adopting the modified $f(Q)$ gravity theory to the cosmology. Consequently, researchers could not get beyond what is already known in $f(T)$ theory earlier. To alleviate this problem, in the present manuscript we investigate a recently proposed construction o... |
2206.14158 | Orlando Luongo | Alessio Belfiglio, Roberto Giamb\`o, Orlando Luongo | Alleviating the cosmological constant problem from particle production | 23 pages; 7 figures; 2 tables | Class.Quant.Grav. 40 (2023) 10, 105004 | 10.1088/1361-6382/accc00 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore a toy model mechanism of geometric cancellation, alleviating the
(classical) cosmological constant problem. To do so, we assume at primordial
times that vacuum energy fuels an inflationary quadratic hilltop potential
nonminimally coupled to gravity through a standard Yukawa-like interacting
term, whose bac... | [
{
"created": "Tue, 28 Jun 2022 17:06:26 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2024 12:18:20 GMT",
"version": "v2"
}
] | 2024-06-12 | [
[
"Belfiglio",
"Alessio",
""
],
[
"Giambò",
"Roberto",
""
],
[
"Luongo",
"Orlando",
""
]
] | We explore a toy model mechanism of geometric cancellation, alleviating the (classical) cosmological constant problem. To do so, we assume at primordial times that vacuum energy fuels an inflationary quadratic hilltop potential nonminimally coupled to gravity through a standard Yukawa-like interacting term, whose backg... |
2111.07219 | Javier M. Antelis | Javier M. Antelis, Marco Cavaglia, Travis Hansen, Manuel D. Morales,
Claudia Moreno, Soma Mukherjee, Marek J. Szczepa\'nczyk, Michele Zanolin | Using supervised learning algorithms as a follow-up method in the search
of gravitational waves from core-collapse supernovae | null | null | 10.1103/PhysRevD.105.084054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a follow-up method based on supervised machine learning (ML) to
improve the performance in the search of gravitational wave (GW) burts from
core-collapse supernovae (CCSNe) using the coherent WaveBurst (cWB) pipeline.
The ML model discriminates noise from signal events using as features a set of
reconstruc... | [
{
"created": "Sun, 14 Nov 2021 01:31:11 GMT",
"version": "v1"
}
] | 2022-05-11 | [
[
"Antelis",
"Javier M.",
""
],
[
"Cavaglia",
"Marco",
""
],
[
"Hansen",
"Travis",
""
],
[
"Morales",
"Manuel D.",
""
],
[
"Moreno",
"Claudia",
""
],
[
"Mukherjee",
"Soma",
""
],
[
"Szczepańczyk",
"Marek J.",
... | We present a follow-up method based on supervised machine learning (ML) to improve the performance in the search of gravitational wave (GW) burts from core-collapse supernovae (CCSNe) using the coherent WaveBurst (cWB) pipeline. The ML model discriminates noise from signal events using as features a set of reconstructi... |
gr-qc/0406117 | Emanuel Gallo | Emanuel Gallo | Two-dimensional Riemannian and Lorentzian geometries from second order
ODEs | 9 pages, final version to appear in J. Math. Phys | J.Math.Phys. 45 (2004) 4186-4190 | 10.1063/1.1806261 | null | gr-qc | null | In this note we give an alternative geometrical derivation of the results
recently presented by Garcia-Godinez, Newman and Silva-Ortigoza in [1] on the
class of all two-dimensional riemannian and lorentzian metrics from 2nd order
ODEs which are in duality with the two dimensional Hamilton-Jacobi equation. We
show tha... | [
{
"created": "Tue, 29 Jun 2004 20:45:04 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jul 2004 15:57:11 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Aug 2004 21:52:47 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Gallo",
"Emanuel",
""
]
] | In this note we give an alternative geometrical derivation of the results recently presented by Garcia-Godinez, Newman and Silva-Ortigoza in [1] on the class of all two-dimensional riemannian and lorentzian metrics from 2nd order ODEs which are in duality with the two dimensional Hamilton-Jacobi equation. We show that,... |
2402.01192 | Debojit Paul ` | Debojit Paul, Pranjali Bhattacharjee, Sanjeev Kalita | Kerr-scalaron metric and astronomical consequences near the Galactic
Center black hole | 22 pages, 14 figures, Accepted for publication in ApJ | ApJ 964 127 (2024) | 10.3847/1538-4357/ad24f0 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astronomical tests of spacetime metric and gravitation theory near the
Galactic Center (GC) black hole, Sgr A* have gained momentum with the
observations of compact stellar orbits near the black hole and measurement of
the black hole shadow. Deviation from the Kerr metric is a potential signature
of modified gravity ... | [
{
"created": "Fri, 2 Feb 2024 07:29:28 GMT",
"version": "v1"
}
] | 2024-04-10 | [
[
"Paul",
"Debojit",
""
],
[
"Bhattacharjee",
"Pranjali",
""
],
[
"Kalita",
"Sanjeev",
""
]
] | Astronomical tests of spacetime metric and gravitation theory near the Galactic Center (GC) black hole, Sgr A* have gained momentum with the observations of compact stellar orbits near the black hole and measurement of the black hole shadow. Deviation from the Kerr metric is a potential signature of modified gravity th... |
2401.02003 | Xinliang An | Xinliang An | Naked Singularity Censoring with Anisotropic Apparent Horizon | 90 pages, announced in December 2022 | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | Employing the Einstein-scalar field system, we demonstrate an approach for
proving high co-dimensional nonlinear instability of naked-singularity
solutions as constructed by Christodoulou in [18]. We further investigate the
censorship of Christodoulou's naked singularity and show that a tiny
anisotropic perturbation ... | [
{
"created": "Wed, 3 Jan 2024 23:50:30 GMT",
"version": "v1"
}
] | 2024-01-05 | [
[
"An",
"Xinliang",
""
]
] | Employing the Einstein-scalar field system, we demonstrate an approach for proving high co-dimensional nonlinear instability of naked-singularity solutions as constructed by Christodoulou in [18]. We further investigate the censorship of Christodoulou's naked singularity and show that a tiny anisotropic perturbation ar... |
1807.10381 | Karthik Shankar | Karthik H. Shankar | Eternally oscillating zero energy Universe | View the published article at https://rdcu.be/b2zkW | Gen Relativ Gravit 52, 23 (2020) | 10.1007/s10714-020-02671-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question of whether the universe is eternal or if it had a singular
moment of creation is deeply intriguing. Although different versions of steady
state and oscillatory models of eternal universe have been envisaged, empirical
evidence suggests a singular moment of creation at the big bang. Here we
analyze the os... | [
{
"created": "Thu, 26 Jul 2018 22:02:50 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Aug 2019 19:42:10 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Mar 2020 00:32:46 GMT",
"version": "v3"
}
] | 2020-03-09 | [
[
"Shankar",
"Karthik H.",
""
]
] | The question of whether the universe is eternal or if it had a singular moment of creation is deeply intriguing. Although different versions of steady state and oscillatory models of eternal universe have been envisaged, empirical evidence suggests a singular moment of creation at the big bang. Here we analyze the osci... |
2105.07053 | Juan Margalef-Bentabol | Fernando Barbero G., Juan Margalef-Bentabol, Valle Varo, Eduardo J.S.
Villase\~nor | Palatini gravity with nonmetricity, torsion, and boundaries in metric
and connection variables | null | Physical Review D, 104 (2021) 044046 | 10.1103/PhysRevD.104.044046 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by-sa/4.0/ | We prove the equivalence in the covariant phase space of the metric and
connection formulations for Palatini gravity, with nonmetricity and torsion, on
a spacetime manifold with boundary. To this end, we will rely on the
cohomological approach provided by the relative bicomplex framework. Finally,
we discuss some of ... | [
{
"created": "Fri, 14 May 2021 19:53:10 GMT",
"version": "v1"
}
] | 2021-09-28 | [
[
"G.",
"Fernando Barbero",
""
],
[
"Margalef-Bentabol",
"Juan",
""
],
[
"Varo",
"Valle",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We prove the equivalence in the covariant phase space of the metric and connection formulations for Palatini gravity, with nonmetricity and torsion, on a spacetime manifold with boundary. To this end, we will rely on the cohomological approach provided by the relative bicomplex framework. Finally, we discuss some of th... |
gr-qc/9608032 | Carlo Rovelli | Carlo Rovelli | Loop Quantum Gravity and Black Hole Physics | Lecture at the Journees Relativistes, Ascona 1996. LaTeX, 1
PostScript figure (a.eps), uses epsfig.sty | Helv.Phys.Acta 69:582-611,1996 | null | null | gr-qc hep-th | null | I summarize the basic ideas and formalism of loop quantum gravity. I
illustrate the results on the discrete aspects of quantum geometry and two
applications of these results to black hole physics. In particular, I discuss
in detail a derivation of the Bekenstein-Hawking formula for the entropy of a
black hole from fi... | [
{
"created": "Wed, 14 Aug 1996 16:59:18 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Rovelli",
"Carlo",
""
]
] | I summarize the basic ideas and formalism of loop quantum gravity. I illustrate the results on the discrete aspects of quantum geometry and two applications of these results to black hole physics. In particular, I discuss in detail a derivation of the Bekenstein-Hawking formula for the entropy of a black hole from firs... |
2005.11850 | Yiwen Huang | Yiwen Huang, Carl-Johan Haster, Salvatore Vitale, Vijay Varma,
Francois Foucart, Sylvia Biscoveanu | Statistical and systematic uncertainties in extracting the source
properties of neutron star - black hole binaries with gravitational waves | 39 pages, 24 figures, 15 tables | Phys. Rev. D 103, 083001 (2021) | 10.1103/PhysRevD.103.083001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted by neutron star black hole mergers encode key
properties of neutron stars - such as their size, maximum mass and spins - and
black holes. However, the presence of matter and the high mass ratio makes
generating long and accurate waveforms from these systems hard to do with
numerical relati... | [
{
"created": "Sun, 24 May 2020 22:16:37 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Aug 2020 05:18:30 GMT",
"version": "v2"
}
] | 2021-04-14 | [
[
"Huang",
"Yiwen",
""
],
[
"Haster",
"Carl-Johan",
""
],
[
"Vitale",
"Salvatore",
""
],
[
"Varma",
"Vijay",
""
],
[
"Foucart",
"Francois",
""
],
[
"Biscoveanu",
"Sylvia",
""
]
] | Gravitational waves emitted by neutron star black hole mergers encode key properties of neutron stars - such as their size, maximum mass and spins - and black holes. However, the presence of matter and the high mass ratio makes generating long and accurate waveforms from these systems hard to do with numerical relativi... |
gr-qc/0603021 | Andrew Beckwith | A.W.Beckwith | How can Brane World physics influence Axion temperature dependence,
initial vacuum states, and permissible solutions to the Wheeler-De Witt
equation? | 36 pages, 1 figure. In foot note and general font style which will be
adhered to by the electronic journal of theoretical physics, once this paper
is published by them | Electron.J.Theor.Phys.4N15:105-142,2007 | null | null | gr-qc | null | We are investigating if the Jeans instability criteria mandading a low
entropy,low temperature initial pre inflation state configuration can be
recociled with thermal conditions of temperature at or above ten to the 12
power Kelvin, or higher,when cosmic inflation physics takes over. We justify
this by pointing to th... | [
{
"created": "Wed, 8 Mar 2006 04:48:10 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jul 2006 16:19:38 GMT",
"version": "v10"
},
{
"created": "Mon, 3 Jul 2006 23:16:14 GMT",
"version": "v11"
},
{
"created": "Sat, 29 Jul 2006 06:22:46 GMT",
"version": "v12"
},
{
"c... | 2008-11-26 | [
[
"Beckwith",
"A. W.",
""
]
] | We are investigating if the Jeans instability criteria mandading a low entropy,low temperature initial pre inflation state configuration can be recociled with thermal conditions of temperature at or above ten to the 12 power Kelvin, or higher,when cosmic inflation physics takes over. We justify this by pointing to the ... |
1805.09206 | Carlos A. Batista da S. Filho | Carlos Batista and Gabriel Luz Almeida | A Class of Integrable Metrics II | 11 pages | Phys. Rev. D 98, 044030 (2018) | 10.1103/PhysRevD.98.044030 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting with a subclass of the four-dimensional spaces possessing two
commuting Killing vectors and a non-trivial Killing tensor, we fully integrate
Einstein's vacuum equation with a cosmological constant. Although most of the
solutions happen to be already known, we have found a solution that, as far as
we could se... | [
{
"created": "Wed, 23 May 2018 14:52:29 GMT",
"version": "v1"
}
] | 2018-08-29 | [
[
"Batista",
"Carlos",
""
],
[
"Almeida",
"Gabriel Luz",
""
]
] | Starting with a subclass of the four-dimensional spaces possessing two commuting Killing vectors and a non-trivial Killing tensor, we fully integrate Einstein's vacuum equation with a cosmological constant. Although most of the solutions happen to be already known, we have found a solution that, as far as we could sear... |
1912.06471 | Alesandro Santos | W. A. G. De Moraes and A. F. Santos | Lagrangian formalism for Rastall theory of gravity and G\"{o}del-type
universe | 18 pages, accepted for publication in GRG | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Rastall gravity a non-minimal coupling between geometry and matter
fields is considered. Then the usual energy-momentum tensor conservation law is
not valid. Here a Lagrangian formalism is proposed to the Rastall theory of
gravity. The G\"{o}del-type universe is studied in this gravitational model.
Then it is ... | [
{
"created": "Tue, 10 Dec 2019 15:18:15 GMT",
"version": "v1"
}
] | 2019-12-16 | [
[
"De Moraes",
"W. A. G.",
""
],
[
"Santos",
"A. F.",
""
]
] | In the Rastall gravity a non-minimal coupling between geometry and matter fields is considered. Then the usual energy-momentum tensor conservation law is not valid. Here a Lagrangian formalism is proposed to the Rastall theory of gravity. The G\"{o}del-type universe is studied in this gravitational model. Then it is st... |
2006.05735 | Vardarajan Suneeta | Dhanya S.Menon, Vardarajan Suneeta | Nonlinear perturbations of higher dimensional anti-de Sitter spacetime | 43 pages, discussion expanded, numerical factor missed in a
Mathematica file related to previous version corrected, thanks to referees
for their comments that led to correction. Resonant terms now vanish at
second order for cases studied | Phys. Rev. D 102, 104026 (2020) | 10.1103/PhysRevD.102.104026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study nonlinear gravitational perturbations of vacuum Einstein equations,
with $\Lambda<0$ in $(n+2)$ dimensions, with $n>2$, generalizing previous
studies for $n=2$. We follow the formalism by Ishibashi, Kodama and Seto to
decompose the metric perturbations into tensor, vector and scalar sectors, and
simplify the... | [
{
"created": "Wed, 10 Jun 2020 08:51:32 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Sep 2020 15:11:34 GMT",
"version": "v2"
}
] | 2020-11-18 | [
[
"Menon",
"Dhanya S.",
""
],
[
"Suneeta",
"Vardarajan",
""
]
] | We study nonlinear gravitational perturbations of vacuum Einstein equations, with $\Lambda<0$ in $(n+2)$ dimensions, with $n>2$, generalizing previous studies for $n=2$. We follow the formalism by Ishibashi, Kodama and Seto to decompose the metric perturbations into tensor, vector and scalar sectors, and simplify the E... |
1110.3448 | Guoying Chee | Guo-Ying Qi, Yongxin Guo | A exact de Sitter cosmological solution of quadratic gravitation with
torsion | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A exact de Sitter-like cosmological solution of quadratic gravitation with
torsion has been found. In the limit of constant energy and pressure, it
becomes a exact de Sitter spacetime. It exists in a wide class of quadratic
gravity theories and is the same in vacuum for all the models in this class, no
matter how the... | [
{
"created": "Sun, 16 Oct 2011 01:50:10 GMT",
"version": "v1"
}
] | 2011-10-18 | [
[
"Qi",
"Guo-Ying",
""
],
[
"Guo",
"Yongxin",
""
]
] | A exact de Sitter-like cosmological solution of quadratic gravitation with torsion has been found. In the limit of constant energy and pressure, it becomes a exact de Sitter spacetime. It exists in a wide class of quadratic gravity theories and is the same in vacuum for all the models in this class, no matter how the c... |
1306.0317 | Piotr Bizon | Piotr Bizo\'n and Joanna Ja{\l}mu\.zna | Globally regular instability of $AdS_3$ | 5 pages, 4 figures. Dedicated to Professor Andrzej Staruszkiewicz on
the occasion of the 50th anniversary of his pioneering work on
three-dimensional gravity | Phys. Rev. Lett. 111, 041102 (2013) | 10.1103/PhysRevLett.111.041102 | null | gr-qc hep-th math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider three-dimensional AdS gravity minimally coupled to a massless
scalar field and study numerically the evolution of small smooth circularly
symmetric perturbations of the $AdS_3$ spacetime. As in higher dimensions, for
a large class of perturbations, we observe a turbulent cascade of energy to
high frequenc... | [
{
"created": "Mon, 3 Jun 2013 08:14:34 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Bizoń",
"Piotr",
""
],
[
"Jałmużna",
"Joanna",
""
]
] | We consider three-dimensional AdS gravity minimally coupled to a massless scalar field and study numerically the evolution of small smooth circularly symmetric perturbations of the $AdS_3$ spacetime. As in higher dimensions, for a large class of perturbations, we observe a turbulent cascade of energy to high frequencie... |
0802.2450 | Z. Ya. Turakulov | A.T. Muminov | Motion of Spin 1/2 Massless Particle in a Curved Spacetime. I.
Lagrangian Approach | 7 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasi-classical picture of motion of spin 1/2 massless particle in a curved
spacetime is built on base of simple Lagrangian model. The one is constructed
due to analogy with Lagrangian of massive spin 1/2 particle. Equations of
motion and spin propagation coincide with Papapetrou equations describing
dynamic of photo... | [
{
"created": "Mon, 18 Feb 2008 10:31:45 GMT",
"version": "v1"
}
] | 2008-02-19 | [
[
"Muminov",
"A. T.",
""
]
] | Quasi-classical picture of motion of spin 1/2 massless particle in a curved spacetime is built on base of simple Lagrangian model. The one is constructed due to analogy with Lagrangian of massive spin 1/2 particle. Equations of motion and spin propagation coincide with Papapetrou equations describing dynamic of photon ... |
1804.11106 | Dirk Puetzfeld | Dirk Puetzfeld, Yuri N. Obukhov | Deviation equation in Riemann-Cartan spacetime | 9 pages, 1 figure | Phys. Rev. D 97, 104069 (2018) | 10.1103/PhysRevD.97.104069 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a generalized deviation equation in Riemann-Cartan spacetime. The
equation describes the dynamics of the connecting vector which links events on
two general adjacent world lines. Our result is valid for any theory in a
Riemann-Cartan background, in particular, it is applicable to a large class of
gravitatio... | [
{
"created": "Mon, 30 Apr 2018 09:55:39 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Jun 2018 09:57:46 GMT",
"version": "v2"
}
] | 2018-06-05 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | We derive a generalized deviation equation in Riemann-Cartan spacetime. The equation describes the dynamics of the connecting vector which links events on two general adjacent world lines. Our result is valid for any theory in a Riemann-Cartan background, in particular, it is applicable to a large class of gravitationa... |
2201.06739 | Paxy George Dr | Paxy George | Holographic Ricci DE as running vacuum with nonlinear interactions | 18 pages, 12 figures | null | 10.1142/S021827182250122X | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The holographic Ricci dark energy can be treated as a running vacuum due to
its analogy in the energy density, which is a combination of $H$ and $\dot H$,
the model can predict either eternal acceleration or eternal deceleration. In
the earlier works, we have shown that the presence of additive constant in the
energy... | [
{
"created": "Tue, 18 Jan 2022 04:36:06 GMT",
"version": "v1"
}
] | 2023-01-25 | [
[
"George",
"Paxy",
""
]
] | The holographic Ricci dark energy can be treated as a running vacuum due to its analogy in the energy density, which is a combination of $H$ and $\dot H$, the model can predict either eternal acceleration or eternal deceleration. In the earlier works, we have shown that the presence of additive constant in the energy d... |
0909.2487 | Nima Khosravi | N. Khosravi, H. R. Sepangi, B. Vakili | A cosmological viewpoint on the correspondence between deformed
phase-space and canonical quantization | 19 pages, 31 figures; This paper is a complement to arXiv:0903.1914; | Gen.Rel.Grav.42:1081-1102,2010 | 10.1007/s10714-009-0894-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ the familiar canonical quantization procedure in a given
cosmological setting to argue that it is equivalent to and results in the same
physical picture if one considers the deformation of the phase-space instead.
To show this we use a Probabilistic Evolutionary Process (PEP) to make the
solutions of these ... | [
{
"created": "Mon, 14 Sep 2009 08:23:30 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 2010 06:08:27 GMT",
"version": "v2"
}
] | 2010-05-25 | [
[
"Khosravi",
"N.",
""
],
[
"Sepangi",
"H. R.",
""
],
[
"Vakili",
"B.",
""
]
] | We employ the familiar canonical quantization procedure in a given cosmological setting to argue that it is equivalent to and results in the same physical picture if one considers the deformation of the phase-space instead. To show this we use a Probabilistic Evolutionary Process (PEP) to make the solutions of these di... |
1707.06994 | Marie-No\"elle C\'el\'erier | M.-N. C\'el\'erier, N. O. Santos, V. H. Satheeshkumar | Hilbert repulsion in the Reissner-Nordstr\"om and Schwarzschild
spacetimes | 10 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Studying particle motion in the gravitational field of a black hole from the
perspective of different observers is important for separating the coordinate
artifacts from the physical phenomena. In this paper, we show that a freely
falling test particle exhibits gravitational repulsion by a black hole as seen
by an as... | [
{
"created": "Fri, 21 Jul 2017 08:17:24 GMT",
"version": "v1"
}
] | 2017-07-25 | [
[
"Célérier",
"M. -N.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Satheeshkumar",
"V. H.",
""
]
] | Studying particle motion in the gravitational field of a black hole from the perspective of different observers is important for separating the coordinate artifacts from the physical phenomena. In this paper, we show that a freely falling test particle exhibits gravitational repulsion by a black hole as seen by an asym... |
1901.06206 | Andrea Giusti | R. Casadio, A. Giusti, A. Mentrelli | Orbits in a stochastic Schwarzschild geometry | REVTeX 23 pages, 20 figures | Phys. Rev. D 100, 024036 (2019) | 10.1103/PhysRevD.100.024036 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study geodesics in the Schwarzschild space-time affected by an uncertainty
in the mass parameter described by a Gaussian distribution. This study could
serve as a first attempt at investigating possible quantum effects of black
hole space-times on the motion of matter in their surroundings as well as the
role of u... | [
{
"created": "Fri, 18 Jan 2019 12:42:40 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2019 15:49:18 GMT",
"version": "v2"
}
] | 2019-07-24 | [
[
"Casadio",
"R.",
""
],
[
"Giusti",
"A.",
""
],
[
"Mentrelli",
"A.",
""
]
] | We study geodesics in the Schwarzschild space-time affected by an uncertainty in the mass parameter described by a Gaussian distribution. This study could serve as a first attempt at investigating possible quantum effects of black hole space-times on the motion of matter in their surroundings as well as the role of unc... |
2305.04336 | Shafqat Ul Islam | Jitendra Kumar, Shafqat Ul Islam and Sushant G. Ghosh | Strong Gravitational Lensing by Loop Quantum Gravity Motivated Rotating
Black Holes and EHT Observations | 16 Pages, 11 Figures, 3 Tables, Accepted for publication in EPJC | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We investigate gravitational lensing in the strong deflection regime by loop
quantum gravity (LQG)-motivated rotating black hole (LMRBH) metrics with an
additional parameter $l$ besides mass $M$ and rotation $a$. The LMRBH
spacetimes are regular everywhere, asymptotically encompassing the Kerr black
hole as a particu... | [
{
"created": "Sun, 7 May 2023 17:26:54 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Oct 2023 04:17:48 GMT",
"version": "v2"
}
] | 2023-10-31 | [
[
"Kumar",
"Jitendra",
""
],
[
"Islam",
"Shafqat Ul",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | We investigate gravitational lensing in the strong deflection regime by loop quantum gravity (LQG)-motivated rotating black hole (LMRBH) metrics with an additional parameter $l$ besides mass $M$ and rotation $a$. The LMRBH spacetimes are regular everywhere, asymptotically encompassing the Kerr black hole as a particula... |
0812.1307 | Jean Alexandre | Jean Alexandre, Darrel Yawitch | Branon stabilization from fermion-induced radiative corrections | 7 pages | Phys.Lett.B676:184-187,2009 | 10.1016/j.physletb.2009.05.003 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a 3-brane embedded in 5-dimensional space time characterized by a
Gaussian warp factor, for which the four-dimensional effective theory for brane
fluctuation (branons) is unstable. We show that radiative corrections arising
from fermions living on the brane, and therefore coupled to branons, stabilize
the... | [
{
"created": "Mon, 8 Dec 2008 15:56:17 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Apr 2009 11:27:37 GMT",
"version": "v2"
},
{
"created": "Thu, 7 May 2009 14:21:03 GMT",
"version": "v3"
}
] | 2009-05-29 | [
[
"Alexandre",
"Jean",
""
],
[
"Yawitch",
"Darrel",
""
]
] | We consider a 3-brane embedded in 5-dimensional space time characterized by a Gaussian warp factor, for which the four-dimensional effective theory for brane fluctuation (branons) is unstable. We show that radiative corrections arising from fermions living on the brane, and therefore coupled to branons, stabilize the s... |
gr-qc/9807067 | A. Dolgov | A.D. Dolgov and I.D. Novikov | Superluminal propagation of light in gravitational field and non-causal
signals | 18 pages, 4 figures, Latex | Phys.Lett. B442 (1998) 82-89 | 10.1016/S0370-2693(98)01223-4 | TAC-1998-018 | gr-qc hep-th | null | It has been found in several papers that, because of quantum corrections,
light front can propagate with superluminal velocity in gravitational fields
and even in flat space-time across two conducting plates. We show that, if this
is the case, closed time-like trajectories would be possible and, in
particular, in cer... | [
{
"created": "Thu, 23 Jul 1998 15:49:17 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dolgov",
"A. D.",
""
],
[
"Novikov",
"I. D.",
""
]
] | It has been found in several papers that, because of quantum corrections, light front can propagate with superluminal velocity in gravitational fields and even in flat space-time across two conducting plates. We show that, if this is the case, closed time-like trajectories would be possible and, in particular, in certa... |
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