id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0604087 | Luca Lusanna | Luca Lusanna (INFN, Firenze) and Massimo Pauri (Parma Univ. and INFN,
Parma) | Explaining Leibniz-equivalence as difference of non-inertial
appearances: dis-solution of the Hole Argument and physical individuation of
point-events | 37 pages, talk at Oxford Conference on Spacetime (2004), to appear in
Studies in History and Philosophy of Modern Physics. Affiliations Corrected | null | null | null | gr-qc astro-ph hep-th | null | "The last remnant of physical objectivity of space-time" is disclosed in the
case of a continuous family of spatially non-compact models of general
relativity (GR). The {\it physical individuation} of point-events is furnished
by the intrinsic degrees of freedom of the gravitational field, (viz, the {\it
Dirac observ... | [
{
"created": "Thu, 20 Apr 2006 16:59:14 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Apr 2006 16:21:41 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Feb 2007 16:29:28 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
],
[
"Pauri",
"Massimo",
"",
"Parma Univ. and INFN,\n Parma"
]
] | "The last remnant of physical objectivity of space-time" is disclosed in the case of a continuous family of spatially non-compact models of general relativity (GR). The {\it physical individuation} of point-events is furnished by the intrinsic degrees of freedom of the gravitational field, (viz, the {\it Dirac observab... |
2005.14141 | Leonid Perlov | Leonid Perlov | Barbero-Immirzi Value from Experiment | null | Modern Physics Letters A 2021 | 10.1142/S0217732321501923 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider General Relativity as a limit case of the Scalar-Tensor theory
with Barbero-Immirzi field when the field tends to a constant. We use Shapiro
time delay experimental limit of $1/w = (2.1 \pm 2.3)10^{-5}$ provided by the
Cassini spacecraft to find the Barbero-Immirzi parameter value.
| [
{
"created": "Thu, 28 May 2020 16:47:43 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Jun 2020 18:42:35 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Jul 2020 04:39:23 GMT",
"version": "v3"
},
{
"created": "Mon, 26 Oct 2020 19:14:31 GMT",
"version": "v4"
},
{
"cr... | 2021-09-03 | [
[
"Perlov",
"Leonid",
""
]
] | We consider General Relativity as a limit case of the Scalar-Tensor theory with Barbero-Immirzi field when the field tends to a constant. We use Shapiro time delay experimental limit of $1/w = (2.1 \pm 2.3)10^{-5}$ provided by the Cassini spacecraft to find the Barbero-Immirzi parameter value. |
0711.4674 | Romesh K. Kaul | Romesh K. Kaul | Holst Actions for Supergravity Theories | 15 pages | Phys.Rev.D77:045030,2008 | 10.1103/PhysRevD.77.045030 | null | gr-qc hep-th | null | Holst action containing Immirzi parameter for pure gravity is generalised to
the supergravity theories. Supergravity equations of motion are not modified by
such generalisations, thus preserving supersymmetry. Dependence on the Immirzi
parameter does not emerge in the classical equations of motion. This is in
contras... | [
{
"created": "Thu, 29 Nov 2007 09:26:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kaul",
"Romesh K.",
""
]
] | Holst action containing Immirzi parameter for pure gravity is generalised to the supergravity theories. Supergravity equations of motion are not modified by such generalisations, thus preserving supersymmetry. Dependence on the Immirzi parameter does not emerge in the classical equations of motion. This is in contrast ... |
1203.6444 | Cesar S. Lopez-Monsalvo | C. S. Lopez-Monsalvo, F. Nettel, A. Sanchez | Comment on "Geometrothermodynamics of a Charged Black Hole of String
Theory" | Comment on arXiv:1012.2070 | Brazilian Journal of Physics, 2012 | 10.1007/s13538-012-0090-1 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment on the conclusions found by Larra\~naga and Mojica regarding the
consistency of the Geoemtrothermodynamics programme to describe the critical
behaviour of a Gibbons-Maeda-Garfinkle-Horowitz-Strominger charged black hole.
We argue that making the appropriate choice of metric for the thermodynamic
phase spac... | [
{
"created": "Thu, 29 Mar 2012 06:50:25 GMT",
"version": "v1"
}
] | 2013-09-05 | [
[
"Lopez-Monsalvo",
"C. S.",
""
],
[
"Nettel",
"F.",
""
],
[
"Sanchez",
"A.",
""
]
] | We comment on the conclusions found by Larra\~naga and Mojica regarding the consistency of the Geoemtrothermodynamics programme to describe the critical behaviour of a Gibbons-Maeda-Garfinkle-Horowitz-Strominger charged black hole. We argue that making the appropriate choice of metric for the thermodynamic phase space ... |
2109.08463 | Tao Wang | Yanni Zhu, Towe Wang | Shadow of the wormholelike static aether solution | 11 pages, 4 figures, match the version published in PRD | null | 10.1103/PhysRevD.104.104052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, an analytical solution in Einstein-aether theory was presented
explicitly in isotropic coordinates. It is characterized by a mass parameter
$m$ and a combined coupling constant $c_{14}$. By a coordinate transformation,
we verify this solution is equivalent to the previously known static aether
solution. Ass... | [
{
"created": "Fri, 17 Sep 2021 10:56:28 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Nov 2021 17:09:06 GMT",
"version": "v2"
}
] | 2021-12-01 | [
[
"Zhu",
"Yanni",
""
],
[
"Wang",
"Towe",
""
]
] | Recently, an analytical solution in Einstein-aether theory was presented explicitly in isotropic coordinates. It is characterized by a mass parameter $m$ and a combined coupling constant $c_{14}$. By a coordinate transformation, we verify this solution is equivalent to the previously known static aether solution. Assum... |
0811.1870 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Extension of the EGS theorem to metric and Palatini f(R) gravity | 10 pages, latex. Contribution to the anniversary volume "Problems of
Modern Cosmology" in honour of Prof. S.D. Odintsov to be published by Tomsk
University | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using the equivalence between metric and Palatini f(R) (or "modified")
gravities with omega=0, -3/2 Brans-Dicke theories, it is shown that the
Ehlers-Geren-Sachs theorem of general relativity is extended to modified
gravity. In the case of metric f(R) gravity previously studied, this agrees
with previous literatur... | [
{
"created": "Wed, 12 Nov 2008 11:38:54 GMT",
"version": "v1"
}
] | 2008-11-13 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | By using the equivalence between metric and Palatini f(R) (or "modified") gravities with omega=0, -3/2 Brans-Dicke theories, it is shown that the Ehlers-Geren-Sachs theorem of general relativity is extended to modified gravity. In the case of metric f(R) gravity previously studied, this agrees with previous literature. |
1505.03770 | Thomas B\"ackdahl | Thomas B\"ackdahl and Juan A. Valiente Kroon | A formalism for the calculus of variations with spinors | 18 pages. Added diffeomorphism dependence | J. Math. Phys. 57, 022502 (2016) | 10.1063/1.4939562 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a frame and dyad gauge-independent formalism for the calculus of
variations of functionals involving spinorial objects. As part of this
formalism we define a modified variation operator which absorbs frame and spin
dyad gauge terms. This formalism is applicable to both the standard spacetime
(i.e. SL(2,C))... | [
{
"created": "Thu, 14 May 2015 15:57:22 GMT",
"version": "v1"
},
{
"created": "Fri, 22 May 2015 15:07:04 GMT",
"version": "v2"
}
] | 2016-01-14 | [
[
"Bäckdahl",
"Thomas",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | We develop a frame and dyad gauge-independent formalism for the calculus of variations of functionals involving spinorial objects. As part of this formalism we define a modified variation operator which absorbs frame and spin dyad gauge terms. This formalism is applicable to both the standard spacetime (i.e. SL(2,C)) 2... |
1810.09222 | Gulira Tuleganova | Alina Khaybullina, Gulira Tuleganova | Stability of Schwarzschild-$f(R)$ gravity thin-shell wormholes | 10 pages, 5 figures | null | 10.1142/S0217732319500068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mazharimousavi and Halilsoy [1] recently proposed wormhole solutions in
$f(R)$-gravity that satisfy energy conditions but are unstable. We show here
that stability could still be achieved for thin-shell wormholes obtained by
gluing the wormholes in $f(R)$-gravity with the exterior Schwarzschild vacuum.
Using the new ... | [
{
"created": "Mon, 22 Oct 2018 12:47:57 GMT",
"version": "v1"
}
] | 2019-02-20 | [
[
"Khaybullina",
"Alina",
""
],
[
"Tuleganova",
"Gulira",
""
]
] | Mazharimousavi and Halilsoy [1] recently proposed wormhole solutions in $f(R)$-gravity that satisfy energy conditions but are unstable. We show here that stability could still be achieved for thin-shell wormholes obtained by gluing the wormholes in $f(R)$-gravity with the exterior Schwarzschild vacuum. Using the new ge... |
1602.02453 | Nathan Johnson-McDaniel | Abhirup Ghosh, Archisman Ghosh, Nathan K. Johnson-McDaniel, Chandra
Kant Mishra, Parameswaran Ajith, Walter Del Pozzo, David A. Nichols, Yanbei
Chen, Alex B. Nielsen, Christopher P. L. Berry, Lionel London | Testing general relativity using golden black-hole binaries | 5 pages, 2 figs | Phys. Rev. D 94, 021101(R) (2016) | 10.1103/PhysRevD.94.021101 | LIGO-P1500185-v11, ICTS/2016/1 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The coalescences of stellar-mass black-hole binaries through their inspiral,
merger, and ringdown are among the most promising sources for ground-based
gravitational-wave (GW) detectors. If a GW signal is observed with sufficient
signal-to-noise ratio, the masses and spins of the black holes can be estimated
from jus... | [
{
"created": "Mon, 8 Feb 2016 02:57:56 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2016 08:32:59 GMT",
"version": "v2"
}
] | 2016-09-15 | [
[
"Ghosh",
"Abhirup",
""
],
[
"Ghosh",
"Archisman",
""
],
[
"Johnson-McDaniel",
"Nathan K.",
""
],
[
"Mishra",
"Chandra Kant",
""
],
[
"Ajith",
"Parameswaran",
""
],
[
"Del Pozzo",
"Walter",
""
],
[
"Nichols",
"D... | The coalescences of stellar-mass black-hole binaries through their inspiral, merger, and ringdown are among the most promising sources for ground-based gravitational-wave (GW) detectors. If a GW signal is observed with sufficient signal-to-noise ratio, the masses and spins of the black holes can be estimated from just ... |
gr-qc/9504006 | Guillermo Mena | Guillermo A. Mena Marugan | CANONICAL QUANTIZATION OF CYLINDRICALLY SYMMETRIC MODELS | 18 pages, latex, no figures | Phys.Rev.D53:3156-3161,1996 | 10.1103/PhysRevD.53.3156 | null | gr-qc | null | We carry out the canonical quantization of the Levi-Civit\`a family of static
and cylindrical solutions. The reduced phase space of this family of metrics is
proved to coincide with that corresponding to the Kasner model, including the
associated symplectic structures, except for that the respective domains of
defini... | [
{
"created": "Wed, 5 Apr 1995 14:00:19 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Marugan",
"Guillermo A. Mena",
""
]
] | We carry out the canonical quantization of the Levi-Civit\`a family of static and cylindrical solutions. The reduced phase space of this family of metrics is proved to coincide with that corresponding to the Kasner model, including the associated symplectic structures, except for that the respective domains of definiti... |
1504.05774 | James M. Overduin | James M. Overduin | Spacetime, Spin and Gravity Probe B | To appear in a special issue of Classical and Quantum Gravity devoted
to the GP-B experiment. 13 pages, 1 figure | null | 10.1088/0264-9381/32/22/224003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is more important than ever to push experimental tests of gravitational
theory to the limits of existing technology in both range and sensitivity. This
brief review focuses on spin-based tests of General Relativity and their
implications for alternative, mostly non-metric theories of gravity motivated
by the chall... | [
{
"created": "Wed, 22 Apr 2015 13:00:14 GMT",
"version": "v1"
}
] | 2015-12-09 | [
[
"Overduin",
"James M.",
""
]
] | It is more important than ever to push experimental tests of gravitational theory to the limits of existing technology in both range and sensitivity. This brief review focuses on spin-based tests of General Relativity and their implications for alternative, mostly non-metric theories of gravity motivated by the challen... |
2006.12267 | Ranjan Sharma | Ranjan Sharma, Shyam Das, Megan Govender and Dishant M. Pandya | Revisiting Vaidya-Tikekar stellar model in the linear regime | null | Annals of Physics 414 (2020) 168079 | 10.1016/j.aop.2020.168079 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a new class of solutions by revisiting the Vaidya-Tikekar stellar
model in the linear regime. Making use of the Vaidya and Tikekar metric ansatz
[J. Astrophys. Astron. {\bf3} (1982) 325] describing the spacetime of static
spherically symmetric relativistic star composed of an anisotropic matter
distribution... | [
{
"created": "Fri, 19 Jun 2020 05:33:46 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2020 16:36:30 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Sharma",
"Ranjan",
""
],
[
"Das",
"Shyam",
""
],
[
"Govender",
"Megan",
""
],
[
"Pandya",
"Dishant M.",
""
]
] | We obtain a new class of solutions by revisiting the Vaidya-Tikekar stellar model in the linear regime. Making use of the Vaidya and Tikekar metric ansatz [J. Astrophys. Astron. {\bf3} (1982) 325] describing the spacetime of static spherically symmetric relativistic star composed of an anisotropic matter distribution a... |
0910.1252 | Matthew Corne | Matthew Corne, Arkady Kheyfets, Jennifer Piasio, Chad Voegele | Binding in charged spherically symmetric objects | 11 pages, no figures | Int.J.Theor.Phys.50:2737-2747,2011 | 10.1007/s10773-011-0773-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the subject of self--binding in static, spherically symmetric
objects consisting of a charged fluid. We have shown previously that in the
case of a perfect fluid, only the localized part of the mass contributes to
gravitational self--binding of such objects and that in the limiting case of
objects compris... | [
{
"created": "Wed, 7 Oct 2009 13:16:39 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Mar 2010 18:22:10 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Oct 2010 01:43:13 GMT",
"version": "v3"
}
] | 2011-07-15 | [
[
"Corne",
"Matthew",
""
],
[
"Kheyfets",
"Arkady",
""
],
[
"Piasio",
"Jennifer",
""
],
[
"Voegele",
"Chad",
""
]
] | We consider the subject of self--binding in static, spherically symmetric objects consisting of a charged fluid. We have shown previously that in the case of a perfect fluid, only the localized part of the mass contributes to gravitational self--binding of such objects and that in the limiting case of objects comprised... |
gr-qc/9412046 | Franz Schunck | Fjodor V.~Kusmartsev, Eckehard W.~Mielke, Yuri N.~Obukhov, and Franz
E.~Schunck | Classification of Inflationary Einstein--Scalar--Field--Models via
Catastrophe Theory | 12 pages, REVTeX, no figures | Phys.Rev. D51 (1995) 924-927 | 10.1103/PhysRevD.51.924 | Cologne-thp-1994-H6 | gr-qc | null | Various scenarios of the initial inflation of the universe are distinguished
by the choice of a scalar field {\em potential} $U(\phi)$ which simulates a
{\it temporarily} non--vanishing {\em cosmological term}. Our new method, which
involves a reparametrization in terms of the Hubble expansion parameter $H$,
provides... | [
{
"created": "Fri, 16 Dec 1994 21:51:41 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"~Kusmartsev",
"Fjodor V.",
""
],
[
"~Mielke",
"Eckehard W.",
""
],
[
"~Obukhov",
"Yuri N.",
""
],
[
"~Schunck",
"Franz E.",
""
]
] | Various scenarios of the initial inflation of the universe are distinguished by the choice of a scalar field {\em potential} $U(\phi)$ which simulates a {\it temporarily} non--vanishing {\em cosmological term}. Our new method, which involves a reparametrization in terms of the Hubble expansion parameter $H$, provides a... |
gr-qc/9801007 | Philippe Droz-Vincent | Ph. Droz-Vincent (Universite P. et M. Curie, Paris) | Invariance of Positive-Frequency Kernels in Generalized FRW Spacetimes | 25 pages. Plain TeX file | null | null | GCR 97/12/06 | gr-qc hep-th math-ph math.MP | null | We consider the Klein-Gordon equation in FRW-like spacetimes, with compact
space sections (not necessarily isotropic neither homogeneous). The bi-scalar
kernel allowing to select the positive-frequency part of any solution is
developed on mode solutions, using the eigenfunctions of the three-dimensional
Laplacian. Of... | [
{
"created": "Mon, 5 Jan 1998 16:15:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Droz-Vincent",
"Ph.",
"",
"Universite P. et M. Curie, Paris"
]
] | We consider the Klein-Gordon equation in FRW-like spacetimes, with compact space sections (not necessarily isotropic neither homogeneous). The bi-scalar kernel allowing to select the positive-frequency part of any solution is developed on mode solutions, using the eigenfunctions of the three-dimensional Laplacian. Of c... |
1403.6396 | Jaume Amor\'os | Jaume de Haro, Jaume Amor\'os | Viability of the matter bounce scenario in Loop Quantum Cosmology from
BICEP2 last data | 3 figures. New section added to further justify power spectrum
computations. Numerical results more thoroughly explained | JCAP08(2014)025 | 10.1088/1475-7516/2014/08/025 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The CMB map provided by the Planck project constrains the value of the ratio
of tensor-to-scalar perturbations, namely $r$, to be smaller than $0.11$ (95%
CL). This bound rules out the simplest models of inflation. However, recent
data from BICEP2 is in strong tension with this constrain, as it finds a value
$r=0.20^... | [
{
"created": "Tue, 25 Mar 2014 15:43:33 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Mar 2014 18:12:44 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jul 2014 17:02:12 GMT",
"version": "v3"
}
] | 2014-08-14 | [
[
"de Haro",
"Jaume",
""
],
[
"Amorós",
"Jaume",
""
]
] | The CMB map provided by the Planck project constrains the value of the ratio of tensor-to-scalar perturbations, namely $r$, to be smaller than $0.11$ (95% CL). This bound rules out the simplest models of inflation. However, recent data from BICEP2 is in strong tension with this constrain, as it finds a value $r=0.20^{+... |
0811.0232 | Maurice H. P. M. van Putten | Maurice H.P.M. van Putten | Hyperbolic Hamiltonian equations for general relativity | Based on an invited talk at the Federation Denis Poisson (October
2008) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The 3+1 Hamiltonian formulation in the gauge $D_tN=-K$ on the lapse function
fixes the direction of time associated with the trace $K$ of the extrinsic
curvature tensor. The Hamiltonian equations hereby become hyperbolic. We study
this new system for black hole spacetimes that are asymptotically quiescent,
which intr... | [
{
"created": "Mon, 3 Nov 2008 07:25:21 GMT",
"version": "v1"
}
] | 2008-11-04 | [
[
"van Putten",
"Maurice H. P. M.",
""
]
] | The 3+1 Hamiltonian formulation in the gauge $D_tN=-K$ on the lapse function fixes the direction of time associated with the trace $K$ of the extrinsic curvature tensor. The Hamiltonian equations hereby become hyperbolic. We study this new system for black hole spacetimes that are asymptotically quiescent, which introd... |
1512.05358 | Carlos A. R. Herdeiro | Nicolas Sanchis-Gual, Juan Carlos Degollado, Pedro J. Montero, Jos\'e
A. Font, Carlos Herdeiro | Explosion and final state of an unstable Reissner-Nordstrom black hole | 5 pages, 4 figures; v2: 8 pages, including Supplemental Material;
matches published version in Phys. Rev. Lett.; title changed | Phys. Rev. Lett. 116, 141101 (2016) | 10.1103/PhysRevLett.116.141101 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Reissner-Nordstr\"om black hole (BH) is superradiantly unstable against
spherical perturbations of a charged scalar field, enclosed in a cavity, with
frequency lower than a critical value. We use numerical relativity techniques
to follow the development of this unstable system -- dubbed a charged BH bomb
-- into th... | [
{
"created": "Wed, 16 Dec 2015 21:00:06 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Apr 2016 16:40:25 GMT",
"version": "v2"
}
] | 2016-04-20 | [
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Montero",
"Pedro J.",
""
],
[
"Font",
"José A.",
""
],
[
"Herdeiro",
"Carlos",
""
]
] | A Reissner-Nordstr\"om black hole (BH) is superradiantly unstable against spherical perturbations of a charged scalar field, enclosed in a cavity, with frequency lower than a critical value. We use numerical relativity techniques to follow the development of this unstable system -- dubbed a charged BH bomb -- into the ... |
0712.3660 | Matej Pavsic | Matej Pavsic | Towards a New Paradigm: Relativity in Configuration Space | 15 pages; Presented at "Time and Matter 2007", 26-31 August 2007,
Bled, Slovenia | null | null | null | gr-qc | null | We consider the possibility that the basic space of physics is not spacetime,
but configuration space. We illustrate this on the example with a system of
gravitationally interacting point particles. It turns out that such system can
be described by the minimal length action in a multidimensional configuration
space C... | [
{
"created": "Fri, 21 Dec 2007 12:54:18 GMT",
"version": "v1"
}
] | 2007-12-24 | [
[
"Pavsic",
"Matej",
""
]
] | We consider the possibility that the basic space of physics is not spacetime, but configuration space. We illustrate this on the example with a system of gravitationally interacting point particles. It turns out that such system can be described by the minimal length action in a multidimensional configuration space C w... |
2001.07052 | Edward Malec | Wojciech Kulczycki and Edward Malec | General-relativistic rotation laws in fluid tori around spinning black
holes | 6 pages | Phys. Rev. D 101, 084016 (2020) | 10.1103/PhysRevD.101.084016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain rotation laws for axially symmetric, selfgravitating and stationary
fluids around spinning black holes. They reduce --- in the Newtonian limit ---
to monomial rotation curves. For spinless black hole, one obtains in the first
post-Newtonian (1PN) approximation the hitherto known results, that can be
interpr... | [
{
"created": "Mon, 20 Jan 2020 10:53:07 GMT",
"version": "v1"
}
] | 2020-04-15 | [
[
"Kulczycki",
"Wojciech",
""
],
[
"Malec",
"Edward",
""
]
] | We obtain rotation laws for axially symmetric, selfgravitating and stationary fluids around spinning black holes. They reduce --- in the Newtonian limit --- to monomial rotation curves. For spinless black hole, one obtains in the first post-Newtonian (1PN) approximation the hitherto known results, that can be interpret... |
gr-qc/0110028 | Alan Barnes | Ugur Camci & Alan Barnes | Ricci Collineations in Friedmann-Robertson-Walker Spacetimes | 14 pages, plain TeX, no figures | Class.Quant.Grav. 19 (2002) 393-404 | null | null | gr-qc | null | Ricci collineations and Ricci inheritance collineations of
Friedmann-Robertson-Walker spacetimes are considered. When the Ricci tensor is
non-degenerate, it is shown that the spacetime always admits a fifteen
parameter group of Ricci inheritance collineations; this is the maximal
possible dimension for spacetime mani... | [
{
"created": "Thu, 4 Oct 2001 21:15:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Camci",
"Ugur",
""
],
[
"Barnes",
"Alan",
""
]
] | Ricci collineations and Ricci inheritance collineations of Friedmann-Robertson-Walker spacetimes are considered. When the Ricci tensor is non-degenerate, it is shown that the spacetime always admits a fifteen parameter group of Ricci inheritance collineations; this is the maximal possible dimension for spacetime manifo... |
2202.11259 | Gregory Horndeski | Gregory W. Horndeski | Reformulating Scalar-Tensor Field Theories as Scalar-Scalar Field
Theories Using a Novel Geometry | 53 pages | null | 10.1098/rsta.2021.0183 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper I shall show how the notions of Finsler geometry can be used to
construct a similar geometry using a scalar field, f, on the cotangent bundle
of a differentiable manifold M. This will enable me to use the second vertical
derivatives of f, along with the differential of a scalar field phi on M, to
constr... | [
{
"created": "Wed, 23 Feb 2022 01:24:51 GMT",
"version": "v1"
}
] | 2022-03-23 | [
[
"Horndeski",
"Gregory W.",
""
]
] | In this paper I shall show how the notions of Finsler geometry can be used to construct a similar geometry using a scalar field, f, on the cotangent bundle of a differentiable manifold M. This will enable me to use the second vertical derivatives of f, along with the differential of a scalar field phi on M, to construc... |
1205.5386 | Luca Fabbri | Luca Fabbri | Conformal Gravity with Electrodynamics for Fermion Fields and their
Symmetry Breaking Mechanism | 13 pages | Int.J.Geom.Meth.Mod.Phys.11,1450019(2014) | 10.1142/S0219887814500194 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider an axial torsion to build metric-compatible
connections in conformal gravity, with gauge potentials; the geometric
background is filled with Dirac spinors: scalar fields with suitable potentials
are added eventually. The system of field equations is worked out to have
torsional effects conve... | [
{
"created": "Thu, 24 May 2012 09:55:43 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Oct 2013 23:57:32 GMT",
"version": "v2"
}
] | 2014-03-12 | [
[
"Fabbri",
"Luca",
""
]
] | In this paper we consider an axial torsion to build metric-compatible connections in conformal gravity, with gauge potentials; the geometric background is filled with Dirac spinors: scalar fields with suitable potentials are added eventually. The system of field equations is worked out to have torsional effects convert... |
2105.08428 | Dirk Puetzfeld | Yuri N. Obukhov, Dirk Puetzfeld | Demystifying autoparallels in alternative gravity | 4 pages | Phys. Rev. D 104, 044031 (2021) | 10.1103/PhysRevD.104.044031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Autoparallel curves along with geodesic curves can arise as trajectories of
physical test bodies. We explicitly derive autoparallels as effective
post-Riemannian geometric constructs, and at the same time we argue
\emph{against} postulating autoparallels as fundamental equations of motion for
test bodies in alternati... | [
{
"created": "Tue, 18 May 2021 10:35:33 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Aug 2021 07:40:58 GMT",
"version": "v2"
}
] | 2021-08-17 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | Autoparallel curves along with geodesic curves can arise as trajectories of physical test bodies. We explicitly derive autoparallels as effective post-Riemannian geometric constructs, and at the same time we argue \emph{against} postulating autoparallels as fundamental equations of motion for test bodies in alternative... |
2401.14209 | Jonathan Gorard | Jonathan Gorard | Computational General Relativity in the Wolfram Language using Gravitas
II: ADM Formalism and Numerical Relativity | 76 pages, 54 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the second in a series of two articles introducing the Gravitas
computational general relativity framework, in which we now focus upon the
design and capabilities of Gravitas's numerical subsystem, including its
ability to perform general 3+1 decompositions of spacetime via the ADM
formalism, its support for ... | [
{
"created": "Thu, 25 Jan 2024 14:48:05 GMT",
"version": "v1"
}
] | 2024-01-26 | [
[
"Gorard",
"Jonathan",
""
]
] | This is the second in a series of two articles introducing the Gravitas computational general relativity framework, in which we now focus upon the design and capabilities of Gravitas's numerical subsystem, including its ability to perform general 3+1 decompositions of spacetime via the ADM formalism, its support for th... |
gr-qc/9503051 | Renate Loll | R. Loll (INFN, Florence) | QUANTUM ASPECTS OF 2+1 GRAVITY | 24 pages, TeX, Mar 95; contribution to the JMP special issue on
"Quantum geometry and diffeomorphism invariant quantum field theory" | J.Math.Phys.36:6494-6509,1995 | 10.1063/1.531253 | DFF 223/03/95 | gr-qc hep-th | null | We review and systematize recent attempts to canonically quantize general
relativity in 2+1 dimensions, defined on space-times $\R\times\Sigma^g$, where
$\Sigma^g$ is a compact Riemann surface of genus $g$. The emphasis is on
quantizations of the classical connection formulation, which use Wilson loops
as their basic... | [
{
"created": "Mon, 27 Mar 1995 16:47:58 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Loll",
"R.",
"",
"INFN, Florence"
]
] | We review and systematize recent attempts to canonically quantize general relativity in 2+1 dimensions, defined on space-times $\R\times\Sigma^g$, where $\Sigma^g$ is a compact Riemann surface of genus $g$. The emphasis is on quantizations of the classical connection formulation, which use Wilson loops as their basic o... |
0812.3062 | Wu Ning | Ning Wu | Path Integral Quantization of Quantum Gauge General Relativity | 19 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Path integral quantization of quantum gauge general relativity is discussed
in this paper. First, we deduce the generating functional of green function
with external fields. Based on this generating functional, the propagators of
gravitational gauge field and related ghost field are deduced. Then, we
calculate Feynma... | [
{
"created": "Tue, 16 Dec 2008 14:05:46 GMT",
"version": "v1"
}
] | 2008-12-17 | [
[
"Wu",
"Ning",
""
]
] | Path integral quantization of quantum gauge general relativity is discussed in this paper. First, we deduce the generating functional of green function with external fields. Based on this generating functional, the propagators of gravitational gauge field and related ghost field are deduced. Then, we calculate Feynman ... |
gr-qc/0305039 | Peter Diener | Peter Diener | A new general purpose event horizon finder for 3D numerical spacetimes | 18 pages, 6 figures, submitted to Classical and Quantum Gravity | Class.Quant.Grav. 20 (2003) 4901-4918 | 10.1088/0264-9381/20/22/014 | AEI-2003-043 | gr-qc | null | I present a new general purpose event horizon finder for full 3D numerical
spacetimes. It works by evolving a complete null surface backwards in time. The
null surface is described as the zero level set of a scalar function, that in
principle is defined everywhere. This description of the surface allows the
surface, ... | [
{
"created": "Sat, 10 May 2003 16:42:02 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Diener",
"Peter",
""
]
] | I present a new general purpose event horizon finder for full 3D numerical spacetimes. It works by evolving a complete null surface backwards in time. The null surface is described as the zero level set of a scalar function, that in principle is defined everywhere. This description of the surface allows the surface, tr... |
gr-qc/9609010 | Steve Detweiler | Steven Detweiler, Lee H. Brown | The Post Minkowskii Expansion of General Relativity | This revision contains improvements in the exposition of two sections
and in one appendix and also matches the published version. RevTeX, 22pp | Phys.Rev.D56:826-841,1997 | 10.1103/PhysRevD.56.826 | UF-RAP-96-13 | gr-qc | null | We describe a post-Minkowskii approximation of general relativity as a power
series expansion in G, Newton's gravitational constant. Material sources are
hidden behind boundaries, and only the vacuum Einstein equations are
considered. An iterative procedure is described which, in one complete step,
takes any approxim... | [
{
"created": "Tue, 3 Sep 1996 12:44:35 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jul 1997 13:03:54 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Detweiler",
"Steven",
""
],
[
"Brown",
"Lee H.",
""
]
] | We describe a post-Minkowskii approximation of general relativity as a power series expansion in G, Newton's gravitational constant. Material sources are hidden behind boundaries, and only the vacuum Einstein equations are considered. An iterative procedure is described which, in one complete step, takes any approximat... |
1602.08686 | Peng Wang | Jun Tao, Peng Wang, Haitang Yang | Free-fall Frame Black Hole in Gravity's Rainbow | 18 pages, 2 figures, Journal version. arXiv admin note: substantial
text overlap with arXiv:1507.03768 | Phys. Rev. D 94, 064068 (2016) | 10.1103/PhysRevD.94.064068 | CTP-SCU/2016002 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Doubly special relativity (DSR) is an effective model for encoding quantum
gravity in flat spacetime. To incorporate DSR into general relativity, one
could use "Gravity's rainbow", where the spacetime background felt by a test
particle would depend on its energy. In this scenario, one could rewrite the
rainbow metric... | [
{
"created": "Sun, 28 Feb 2016 09:11:51 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2016 07:05:40 GMT",
"version": "v2"
}
] | 2016-10-14 | [
[
"Tao",
"Jun",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | Doubly special relativity (DSR) is an effective model for encoding quantum gravity in flat spacetime. To incorporate DSR into general relativity, one could use "Gravity's rainbow", where the spacetime background felt by a test particle would depend on its energy. In this scenario, one could rewrite the rainbow metric $... |
gr-qc/0611025 | Jorge P\'aramos | Jorge Paramos and Orfeu Bertolami | Current tests of alternative gravity theories: the Modified Newtonian
Dynamics case | 12 pages. Talk presented by one of us (O.B.) at the Fundamental
Physics in Space section of the Comittee on Space Research, 36th. COSPAR
Scientific Assembly, Beijing, China, 16-23 July, 2006 (version with corrected
reference list) | null | null | null | gr-qc | null | We address the possibility of taking advantage of high accuracy gravitational
space experiments in the Solar System and complementary cosmological tests to
distinguish between the usual general relativistic theory from the alternative
modified Newtonian dynamics paradigm.
| [
{
"created": "Sat, 4 Nov 2006 04:35:20 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Nov 2006 11:51:27 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Paramos",
"Jorge",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | We address the possibility of taking advantage of high accuracy gravitational space experiments in the Solar System and complementary cosmological tests to distinguish between the usual general relativistic theory from the alternative modified Newtonian dynamics paradigm. |
gr-qc/9710019 | Moffat | J. W. Moffat | Quantum Measurements, Nonlocality and the Arrow of Time | 8 pages. Revtex. Revised version | null | null | UTPT-97-05 | gr-qc hep-th quant-ph | null | A theory is developed which attempts to reconcile the measurements of
nonlocal quantum observables with special relativity and quantum mechanics. The
collapse of a wave function, which coincides with a nonlocal measurement by
some macroscopic measuring device, is associated with the triggering of an
absorber mechanis... | [
{
"created": "Thu, 2 Oct 1997 21:54:12 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Sep 1998 21:40:50 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Moffat",
"J. W.",
""
]
] | A theory is developed which attempts to reconcile the measurements of nonlocal quantum observables with special relativity and quantum mechanics. The collapse of a wave function, which coincides with a nonlocal measurement by some macroscopic measuring device, is associated with the triggering of an absorber mechanism ... |
gr-qc/9406047 | Paulo Rodrigues Lima Vargas Moniz | A.D.Y. Cheng, P.D. D'Eath and P.R.L.V. Moniz | Quantization of Bianchi Models in N=1 Supergravity with a Cosmological
Constant | 20 pages, DAMTP R94/20 | Grav.Cosmol.1:12-21,1995 | null | null | gr-qc | null | We study the quantization of some cosmological models within the theory of
N=1 supergravity with a positive cosmological constant. We find, by imposing
the supersymmetry and Lorentz constraints, that there are no physical states in
the models we have considered. For the k=1 Friedmann-Robertson-Walker model,
where the... | [
{
"created": "Tue, 28 Jun 1994 14:20:02 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jul 1994 08:45:25 GMT",
"version": "v2"
}
] | 2011-04-15 | [
[
"Cheng",
"A. D. Y.",
""
],
[
"D'Eath",
"P. D.",
""
],
[
"Moniz",
"P. R. L. V.",
""
]
] | We study the quantization of some cosmological models within the theory of N=1 supergravity with a positive cosmological constant. We find, by imposing the supersymmetry and Lorentz constraints, that there are no physical states in the models we have considered. For the k=1 Friedmann-Robertson-Walker model, where the f... |
2111.02817 | Anisur Rahaman | Sohan Kumar Jha, Anisur Rahaman | Lorentz violation and noncommutative effect on superradiance scattering
off Kerr-like black hole and on the shadow of it | 31 pages latex with 36 figs, modified including Superradiation
phenomena | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a Lorentz violating non-commutating Kerr-like spacetime and
studied the superradiance effect and the shadow cast by the back hole. We
extensively study the different aspects of the black hole associated with a
generalized Kerr-like spacetime metric endowed with the corrections licked with
Lorentz violatio... | [
{
"created": "Thu, 4 Nov 2021 12:35:29 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2022 13:13:50 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Apr 2022 14:52:55 GMT",
"version": "v3"
}
] | 2022-04-22 | [
[
"Jha",
"Sohan Kumar",
""
],
[
"Rahaman",
"Anisur",
""
]
] | We consider a Lorentz violating non-commutating Kerr-like spacetime and studied the superradiance effect and the shadow cast by the back hole. We extensively study the different aspects of the black hole associated with a generalized Kerr-like spacetime metric endowed with the corrections licked with Lorentz violation ... |
1806.02186 | Luis Herrera | L. Herrera | Maxwell's Demon and the Problem of Observers in General Relativity | 6 pages Latex.1 figure. Published in the special issue of Entropy:
Selected Papers from 4th International Electronic Conference on Entropy and
Its Applications | Entropy,20,391,(2018) | 10.3390/e20050391 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fact that real dissipative (entropy producing) processes may be detected
by non-comoving observers (tilted), in systems that appear to be isentropic for
comoving observers, in general relativity, is explained in terms of the
information theory, analogous with the explanation of the Maxwell's demon
paradox
| [
{
"created": "Wed, 6 Jun 2018 13:53:51 GMT",
"version": "v1"
}
] | 2018-07-04 | [
[
"Herrera",
"L.",
""
]
] | The fact that real dissipative (entropy producing) processes may be detected by non-comoving observers (tilted), in systems that appear to be isentropic for comoving observers, in general relativity, is explained in terms of the information theory, analogous with the explanation of the Maxwell's demon paradox |
0801.3805 | Sam Dolan Dr | Sam R. Dolan | Scattering and absorption of gravitational plane waves by rotating black
holes | 43 pages, 17 figures. To match published version | Class.Quant.Grav.25:235002,2008 | 10.1088/0264-9381/25/23/235002 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a study of the scattering and absorption of planar gravitational
waves by a Kerr black hole in vacuum. We apply the partial wave method to
compute cross sections for the special case of radiation incident along the
rotation axis. A catalogue of numerically-accurate cross sections is presented,
for a range of ... | [
{
"created": "Thu, 24 Jan 2008 17:47:07 GMT",
"version": "v1"
},
{
"created": "Mon, 12 May 2008 19:21:10 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Nov 2008 14:42:23 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Dolan",
"Sam R.",
""
]
] | This is a study of the scattering and absorption of planar gravitational waves by a Kerr black hole in vacuum. We apply the partial wave method to compute cross sections for the special case of radiation incident along the rotation axis. A catalogue of numerically-accurate cross sections is presented, for a range of in... |
1407.8165 | Lars Andersson | Lars Andersson | Self-gravitating elastic bodies | 16 pages. Based on a talk given at the 2013 WE-Heraeus seminar on
"Equations of motion in relativistic gravity" | null | 10.1007/978-3-319-18335-0_16 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extended objects in GR are often modelled using distributional solutions of
the Einstein equations with point-like sources, or as the limit of
infinitesimally small "test" objects. In this note, I will consider models of
finite self-gravitating extended objects, which make it possible to give a
rigorous treatment of ... | [
{
"created": "Wed, 30 Jul 2014 19:24:37 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Andersson",
"Lars",
""
]
] | Extended objects in GR are often modelled using distributional solutions of the Einstein equations with point-like sources, or as the limit of infinitesimally small "test" objects. In this note, I will consider models of finite self-gravitating extended objects, which make it possible to give a rigorous treatment of th... |
1211.5403 | Mikjel Thorsrud | John D. Barrow, Mikjel Thorsrud, Kei Yamamoto | Cosmologies in Horndeski's second-order vector-tensor theory | 32 pages, 11 figures, v2: refs added, minor changes. Published in
JHEP02(2013)146 | JHEP02(2013)146 | 10.1007/JHEP02(2013)146 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horndeski derived a most general vector-tensor theory in which the vector
field respects the gauge symmetry and the resulting dynamical equations are of
second order. The action contains only one free parameter, $\lambda$, that
determines the strength of the non-minimal coupling between the gauge field and
gravity. W... | [
{
"created": "Fri, 23 Nov 2012 02:10:06 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Mar 2013 09:17:43 GMT",
"version": "v2"
}
] | 2013-03-12 | [
[
"Barrow",
"John D.",
""
],
[
"Thorsrud",
"Mikjel",
""
],
[
"Yamamoto",
"Kei",
""
]
] | Horndeski derived a most general vector-tensor theory in which the vector field respects the gauge symmetry and the resulting dynamical equations are of second order. The action contains only one free parameter, $\lambda$, that determines the strength of the non-minimal coupling between the gauge field and gravity. We ... |
gr-qc/0404001 | Muhammad Sharif | M. Sharif | Energy and Momentum in General Relativity | null | Nuovo Cim. B118 (2003) 669-683 | 10.1393/ncb/i2003-10053-0 | null | gr-qc | null | The energy and momentum for different cosmological models using various
prescriptions are evaluated. In particular, we have focused our attention on
the energy and momentum for gravitational waves and discuss the results. It is
concluded that there are methods which can provide physically acceptable
results.
| [
{
"created": "Wed, 31 Mar 2004 23:53:56 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sharif",
"M.",
""
]
] | The energy and momentum for different cosmological models using various prescriptions are evaluated. In particular, we have focused our attention on the energy and momentum for gravitational waves and discuss the results. It is concluded that there are methods which can provide physically acceptable results. |
2312.01827 | Ruchi Mishra | Ruchi Mishra and W{\l}odek Klu\'zniak | Equilibrium tori orbiting Reissner-Nordstr\"om naked singularities | Published in the Proceedings of RAGtime 23-35, Z. Stuchl\'ik, G.
T\"or\"ok, V. Karas and D. Lan\v{c}ov\'a, editors, Silesian University in
Opava, 2023, pp. 151-166 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the asymptotically flat space-time of a charged,
spherically symmetric (non-rotating) body is described by the
Reissner-Nordstr\"om metric. This metric corresponds to a naked singularity
when the absolute value of charge, $Q$, exceeds the mass, $M$. For all
Reissner-Nordstr\"om naked singularit... | [
{
"created": "Mon, 4 Dec 2023 11:59:47 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2024 23:42:00 GMT",
"version": "v2"
}
] | 2024-01-29 | [
[
"Mishra",
"Ruchi",
""
],
[
"Kluźniak",
"Włodek",
""
]
] | In general relativity, the asymptotically flat space-time of a charged, spherically symmetric (non-rotating) body is described by the Reissner-Nordstr\"om metric. This metric corresponds to a naked singularity when the absolute value of charge, $Q$, exceeds the mass, $M$. For all Reissner-Nordstr\"om naked singularitie... |
gr-qc/0604102 | Pavel Krtous | Jiri Bicak | Einstein equations: exact solutions | 8 pages, published in Encyclopedia of Mathematical Physics, eds.
J.-P. Francoise, G. L. Naber and Tsou S. T., Oxford: Elsevier, 2006 (ISBN
978-0-1251-2666-3), volume 2, page 165-173. (The number of references had to
be limited, some additional references are indicated inside the text only.) | null | null | null | gr-qc astro-ph hep-th | null | In Einstein's general relativity, with its nonlinear field equations, the
discoveries and analyzes of various specific explicit solutions made a great
impact on understanding many of the unforeseen features of the theory. Some
solutions found fundamental applications in astrophysics, cosmology and, more
recently, in ... | [
{
"created": "Mon, 24 Apr 2006 07:15:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bicak",
"Jiri",
""
]
] | In Einstein's general relativity, with its nonlinear field equations, the discoveries and analyzes of various specific explicit solutions made a great impact on understanding many of the unforeseen features of the theory. Some solutions found fundamental applications in astrophysics, cosmology and, more recently, in th... |
gr-qc/9804061 | Michael Reisenberger | Michael P. Reisenberger | Classical Euclidean general relativity from ``left-handed area =
right-handed area" | 19 pages latex. No figures | null | 10.1088/0264-9381/16/4/024 | null | gr-qc | null | A classical continuum theory corresponding to Barrett and Crane's model of
Euclidean quantum gravity is presented. The fields in this classical theory are
those of SO(4) BF theory, a simple topological theory of an so(4) valued 2-form
field, $B^{IJ}_{\m\n}$, and an so(4) connection. The left handed (self-dual)
and ri... | [
{
"created": "Thu, 23 Apr 1998 20:14:28 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Reisenberger",
"Michael P.",
""
]
] | A classical continuum theory corresponding to Barrett and Crane's model of Euclidean quantum gravity is presented. The fields in this classical theory are those of SO(4) BF theory, a simple topological theory of an so(4) valued 2-form field, $B^{IJ}_{\m\n}$, and an so(4) connection. The left handed (self-dual) and righ... |
0912.2862 | Jose Manuel Velhinho | J. M. Velhinho | Groups of flux-like transformations in loop quantum gravity | 3 pages. Proceedings of the 12th Marcel Grossmann Meeting, Paris, Jul
2009. Talk based on arXiv:0804.3765 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a group of transformations in the quantum configuration space of
loop quantum gravity that contains the set of all transformations generated by
the flux variables.
| [
{
"created": "Tue, 15 Dec 2009 12:24:56 GMT",
"version": "v1"
}
] | 2009-12-16 | [
[
"Velhinho",
"J. M.",
""
]
] | We present a group of transformations in the quantum configuration space of loop quantum gravity that contains the set of all transformations generated by the flux variables. |
gr-qc/0611094 | Ujjal Debnath | Writambhara Chakraborty and Ujjal Debnath | Is Modified Chaplygin gas along with barotropic fluid responsible for
acceleration of the Universe? | RevTex style, 6 pages, 8 figures | Mod.Phys.Lett.A22:1805-1812,2007 | 10.1142/S021773230702172X | null | gr-qc | null | In this letter, we have considered a model of the universe filled with
modified Chaplygin gas and another fluid (with barotropic equation of state)
and its role in accelerating phase of the universe. We have assumed that the
mixture of these two fluid models is valid from (i) the radiation era to
$\Lambda$CDM for $-1... | [
{
"created": "Fri, 17 Nov 2006 07:25:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chakraborty",
"Writambhara",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this letter, we have considered a model of the universe filled with modified Chaplygin gas and another fluid (with barotropic equation of state) and its role in accelerating phase of the universe. We have assumed that the mixture of these two fluid models is valid from (i) the radiation era to $\Lambda$CDM for $-1\l... |
gr-qc/0302018 | Daniele Oriti | Etera R. Livine, Daniele Oriti | Causality in spin foam models for quantum gravity | 6 pages; uses IOP conference macros; to appear in the Proceedings of
the 15th SIGRAV Conference on General Relativity and Gravitational Physics | null | null | DAMTP-2003-10 | gr-qc | null | We describe how the Barrett-Crane spin foam model defines transition
amplitudes for quantum gravity states and how causality can be consistently
implemented in it.
| [
{
"created": "Thu, 6 Feb 2003 16:38:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Livine",
"Etera R.",
""
],
[
"Oriti",
"Daniele",
""
]
] | We describe how the Barrett-Crane spin foam model defines transition amplitudes for quantum gravity states and how causality can be consistently implemented in it. |
gr-qc/9309025 | Robert Caldwell | R. R. Caldwell | Green's function for gravitational waves in FRW spacetimes | 9 pages, FERMILAB-Pub-93/189-A | Phys.Rev. D48 (1993) 4688-4692 | 10.1103/PhysRevD.48.4688 | null | gr-qc astro-ph | null | A method for calculating the retarded Green's function for the gravitational
wave equation in Friedmann-Roberson-Walker spacetimes, within the formalism of
linearized Einstein gravity is developed. Hadamard's general solution to
Cauchy's problem for second-order, linear partial differential equations is
applied to th... | [
{
"created": "Fri, 24 Sep 1993 21:16:16 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Caldwell",
"R. R.",
""
]
] | A method for calculating the retarded Green's function for the gravitational wave equation in Friedmann-Roberson-Walker spacetimes, within the formalism of linearized Einstein gravity is developed. Hadamard's general solution to Cauchy's problem for second-order, linear partial differential equations is applied to the ... |
1703.08894 | Jing-Bo Wang | Jingbo Wang and Chao-Guang Huang | The Conformal Field Theory on the Horizon of BTZ Black Hole | 7 pages | Chinese Physics C, 2018, 42(12): 123110-123110 | 10.1088/1674-1137/42/12/123110 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In three dimensional spacetime with negative cosmology constant, the general
relativity can be written as two copies of SO$(2,1)$ Chern-Simons theory. On a
manifold with boundary the Chern-Simons theory induces a conformal field
theory--WZW theory on the boundary. In this paper, it is show that with
suitable boundary... | [
{
"created": "Mon, 27 Mar 2017 01:41:27 GMT",
"version": "v1"
}
] | 2018-11-22 | [
[
"Wang",
"Jingbo",
""
],
[
"Huang",
"Chao-Guang",
""
]
] | In three dimensional spacetime with negative cosmology constant, the general relativity can be written as two copies of SO$(2,1)$ Chern-Simons theory. On a manifold with boundary the Chern-Simons theory induces a conformal field theory--WZW theory on the boundary. In this paper, it is show that with suitable boundary c... |
gr-qc/0610156 | Christian Corda cordac | Christian Corda | Extension of the frequency-range of interferometers for the ''magnetic''
components of gravitational waves? | Accepted for the International Journal of Modern Physics A | Int.J.Mod.Phys.A22:2361-2381,2007 | 10.1142/S0217751X07036452 | null | gr-qc | null | Recently, with an enlighting treatment, Baskaran and Grishchuk have shown the
presence and importance of the so-called ``magnetic'' components of
gravitational waves (GWs), which have to be taken into account in the context
of the total response functions of interferometers for GWs propagating from
arbitrary directio... | [
{
"created": "Tue, 31 Oct 2006 09:25:19 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Nov 2006 11:08:45 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Nov 2006 11:15:20 GMT",
"version": "v3"
},
{
"created": "Mon, 15 Jan 2007 09:02:53 GMT",
"version": "v4"
},
{
"c... | 2010-10-27 | [
[
"Corda",
"Christian",
""
]
] | Recently, with an enlighting treatment, Baskaran and Grishchuk have shown the presence and importance of the so-called ``magnetic'' components of gravitational waves (GWs), which have to be taken into account in the context of the total response functions of interferometers for GWs propagating from arbitrary directions... |
2306.17130 | Heling Deng | Heling Deng, Bence B\'ecsy, Xavier Siemens, Neil J. Cornish and Dustin
R. Madison | Searching for gravitational wave burst in PTA data with piecewise linear
functions | 13 pages, 10 figures | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Transient gravitational waves (aka gravitational wave bursts) within the
nanohertz frequency band could be generated by a variety of astrophysical
phenomena such as the encounter of supermassive black holes, the kinks or cusps
in cosmic strings, or other as-yet-unknown physical processes. Radio-pulses
emitted from mi... | [
{
"created": "Thu, 29 Jun 2023 17:33:57 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2023 15:00:59 GMT",
"version": "v2"
}
] | 2023-07-13 | [
[
"Deng",
"Heling",
""
],
[
"Bécsy",
"Bence",
""
],
[
"Siemens",
"Xavier",
""
],
[
"Cornish",
"Neil J.",
""
],
[
"Madison",
"Dustin R.",
""
]
] | Transient gravitational waves (aka gravitational wave bursts) within the nanohertz frequency band could be generated by a variety of astrophysical phenomena such as the encounter of supermassive black holes, the kinks or cusps in cosmic strings, or other as-yet-unknown physical processes. Radio-pulses emitted from mill... |
1407.0025 | Wolfgang Wieland | Wolfgang M. Wieland | New action for simplicial gravity in four dimensions | 26 pages, 2 figures | Class. Quantum Grav. 32 (2015) 015016 | 10.1088/0264-9381/32/1/015016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a proposal for a theory of simplicial gravity with spinors as the
fundamental configuration variables. The underlying action describes a
mechanical system with finitely many degrees of freedom, the system has a
Hamiltonian and local gauge symmetries. We will close with some comments on the
resulting quantu... | [
{
"created": "Mon, 30 Jun 2014 20:00:27 GMT",
"version": "v1"
}
] | 2014-12-09 | [
[
"Wieland",
"Wolfgang M.",
""
]
] | We develop a proposal for a theory of simplicial gravity with spinors as the fundamental configuration variables. The underlying action describes a mechanical system with finitely many degrees of freedom, the system has a Hamiltonian and local gauge symmetries. We will close with some comments on the resulting quantum ... |
gr-qc/0412008 | Mladen Martinis Dr | Mladen Martinis and Vesna Mikuta-Martinis | Quantum Horizons and Space-Time Non-Commutativity | LaTex, 6 pages, no figures, Expanded version of a poster presented at
5 European Advanced Study Conference in Ancient Olympia, Greece, July 2004.
to appear in a special issue of IJBC | null | null | null | gr-qc | null | We study dynamics of a scalar field in the near-horizon region described by a
static Klein-Gordon operator which is the Hamiltonian of the system. The
explicite construction of a time operator near-horizon is given and its
self-adjointness discussed.
| [
{
"created": "Thu, 2 Dec 2004 18:19:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Martinis",
"Mladen",
""
],
[
"Mikuta-Martinis",
"Vesna",
""
]
] | We study dynamics of a scalar field in the near-horizon region described by a static Klein-Gordon operator which is the Hamiltonian of the system. The explicite construction of a time operator near-horizon is given and its self-adjointness discussed. |
2301.06480 | Sumati Surya | Anish Bhattacharya, Abhishek Mathur, Sumati Surya | Null Geodesics from Ladder Molecules | Contribution to the collection "Singularity theorems, causality, and
all that (SCRI21)" in the journal General Relativity and Gravitation, in
honor of Roger Penrose | null | 10.1007/s10714-023-03074-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a discrete analogue of null geodesics in causal sets that are
approximated by a region of 2d Minkowski spacetime, in the spirit of Kronheimer
and Penrose's "grids" and "beams" for an abstract causal space. The causal set
analogues are "ladder molecules", whose rungs are linked pairs of elements
correspondi... | [
{
"created": "Mon, 16 Jan 2023 15:39:03 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Bhattacharya",
"Anish",
""
],
[
"Mathur",
"Abhishek",
""
],
[
"Surya",
"Sumati",
""
]
] | We propose a discrete analogue of null geodesics in causal sets that are approximated by a region of 2d Minkowski spacetime, in the spirit of Kronheimer and Penrose's "grids" and "beams" for an abstract causal space. The causal set analogues are "ladder molecules", whose rungs are linked pairs of elements corresponding... |
gr-qc/9910098 | Nistor Nicolaevici | Nistor Nicolaevici | Quantum radiation from a partially reflecting moving mirror | 20 pages, LaTeX | Class.Quant.Grav.18:619-628,2001 | 10.1088/0264-9381/18/4/304 | null | gr-qc | null | We consider the quantum radiation from a partially reflecting moving mirror
for the massless scalar field in 1+1 Minkowski space. Partial reflectivity is
achieved by localizing a delta-type potential at the mirror's position. The
radiated flux is exactly obtained for arbitrary motions as an integral
functional of the... | [
{
"created": "Wed, 27 Oct 1999 00:33:39 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Mar 2000 23:43:19 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Mar 2000 19:51:57 GMT",
"version": "v3"
}
] | 2011-07-19 | [
[
"Nicolaevici",
"Nistor",
""
]
] | We consider the quantum radiation from a partially reflecting moving mirror for the massless scalar field in 1+1 Minkowski space. Partial reflectivity is achieved by localizing a delta-type potential at the mirror's position. The radiated flux is exactly obtained for arbitrary motions as an integral functional of the m... |
1104.3775 | Alexandre Baranov | Alexandre M.Baranov | Lightons and Helixons as Lightlike Particles in General Relativity | 8 pages, 1 figure, Journal of Siberian Federal University.
Mathematics & Physics | J.Sib.Fed.U.4:3-10,2011 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exterior gravitational fields of the massive Schwarzschild, Kerr and NUT
particles have an algebraic type {\bfseries D} according to Petrov's algebraic
classification of the gravitational fields. A lightlike limit is input for
these particles. It is shown that under this limiting procedure the
gravitational field... | [
{
"created": "Tue, 19 Apr 2011 15:24:03 GMT",
"version": "v1"
}
] | 2011-05-24 | [
[
"Baranov",
"Alexandre M.",
""
]
] | The exterior gravitational fields of the massive Schwarzschild, Kerr and NUT particles have an algebraic type {\bfseries D} according to Petrov's algebraic classification of the gravitational fields. A lightlike limit is input for these particles. It is shown that under this limiting procedure the gravitational fields ... |
1307.8144 | Laura Sampson | Laura Sampson, Nicolas Yunes, and Neil Cornish | A Rosetta Stone for Parameterized Tests of Gravity | 13 pages, 1 figure, 7 tables, submitted to Phys. Rev. D | null | 10.1103/PhysRevD.88.064056 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several model-independent parameterizations of deviations from General
Relativity have been developed to test Einstein's theory. Although these
different parameterizations were developed for different gravitational
observables, they ultimately all test the same underlying physics. In this
paper, we develop connection... | [
{
"created": "Tue, 30 Jul 2013 20:56:15 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Sampson",
"Laura",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Cornish",
"Neil",
""
]
] | Several model-independent parameterizations of deviations from General Relativity have been developed to test Einstein's theory. Although these different parameterizations were developed for different gravitational observables, they ultimately all test the same underlying physics. In this paper, we develop connections ... |
2101.02958 | Sajal Mukherjee | Sajal Mukherjee and Naresh Dadhich | Pure Gauss-Bonnet NUT Black Hole Solution: I | 19 pages, 5 figures, Published in: Eur.Phys.J.C | null | 10.1140/epjc/s10052-022-10256-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a new exact $\Lambda$-vacuum solution in pure Gauss-Bonnet gravity
with NUT charge in six dimension with horizon having product topology $S^{(2)}
\times S^{(2)}$. We also discuss its horizon and singularity structure, and
consequently arrive at a parameter window for its physical viability. It should
be noted... | [
{
"created": "Fri, 8 Jan 2021 10:59:41 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Apr 2022 13:42:08 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Mukherjee",
"Sajal",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We find a new exact $\Lambda$-vacuum solution in pure Gauss-Bonnet gravity with NUT charge in six dimension with horizon having product topology $S^{(2)} \times S^{(2)}$. We also discuss its horizon and singularity structure, and consequently arrive at a parameter window for its physical viability. It should be noted t... |
gr-qc/0211100 | Ettore Minguzzi | E. Caponio and E. Minguzzi | Solutions to the Lorentz force equation with fixed charge-to-mass ratio
in globally hyperbolic spacetimes | AMS-Latex, 9 pages | J.Geom.Phys. 49 (2004) 176-186 | 10.1016/S0393-0440(03)00073-1 | null | gr-qc | null | We extend the classical Avez-Seifert theorem to trajectories of charged test
particles with fixed charge-to-mass ratio. In particular, given two events
x_{0} and x_{1}, with x_{1} in the chronological future of x_{0}, we find an
interval I=]-R,R[ such that for any q/m in I there is a timelike connecting
solution of t... | [
{
"created": "Thu, 28 Nov 2002 18:41:08 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2003 19:22:04 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Caponio",
"E.",
""
],
[
"Minguzzi",
"E.",
""
]
] | We extend the classical Avez-Seifert theorem to trajectories of charged test particles with fixed charge-to-mass ratio. In particular, given two events x_{0} and x_{1}, with x_{1} in the chronological future of x_{0}, we find an interval I=]-R,R[ such that for any q/m in I there is a timelike connecting solution of the... |
2012.06356 | Francisco Lobo | Francisco Cabral, Francisco S. N. Lobo, Diego Rubiera-Garcia | Fundamental Symmetries and Spacetime Geometries in Gauge Theories of
Gravity: Prospects for Unified Field Theories | 33 pages. Invite review to the Special Issue "80 Years of Professor
Wigner's Seminal Work "On Unitary Representations of the Inhomogeneous
Lorentz Group"". Matches published version | Universe 2020, 6(12), 238 | 10.3390/universe6120238 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity can be formulated as a gauge theory by combining symmetry principles
and geometrical methods in a consistent mathematical framework. The gauge
approach to gravity leads directly to non-Euclidean, post-Riemannian spacetime
geometries, providing the adequate formalism for metric-affine theories of
gravity with ... | [
{
"created": "Fri, 11 Dec 2020 13:55:56 GMT",
"version": "v1"
}
] | 2020-12-14 | [
[
"Cabral",
"Francisco",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | Gravity can be formulated as a gauge theory by combining symmetry principles and geometrical methods in a consistent mathematical framework. The gauge approach to gravity leads directly to non-Euclidean, post-Riemannian spacetime geometries, providing the adequate formalism for metric-affine theories of gravity with cu... |
2105.12572 | Pramit Rej | Pramit Rej and Piyali Bhar | Charged strange star in $f(R,T)$ gravity with linear equation of state | 26 Pages, 10 Figures | Astrophysics and Space Science 366, 35 (2021) | 10.1007/s10509-021-03943-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our present study involves the strange stars model in the framework of
$f(R,T)$ theory of gravitation. We have taken a linear function of the Ricci
scalar $R$ and the trace $T$ of the stress-energy tensor $T_{\mu \nu}$ for the
expression of $f(R,T)$, i.e., $f(R,T)=R+ 2 \gamma T $ to obtain the proposed
model, where $... | [
{
"created": "Tue, 25 May 2021 14:48:11 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 2021 01:58:03 GMT",
"version": "v2"
}
] | 2021-06-02 | [
[
"Rej",
"Pramit",
""
],
[
"Bhar",
"Piyali",
""
]
] | Our present study involves the strange stars model in the framework of $f(R,T)$ theory of gravitation. We have taken a linear function of the Ricci scalar $R$ and the trace $T$ of the stress-energy tensor $T_{\mu \nu}$ for the expression of $f(R,T)$, i.e., $f(R,T)=R+ 2 \gamma T $ to obtain the proposed model, where $\g... |
1109.0198 | Brian Dolan | Brian P. Dolan | Compressibility of rotating black holes | 8 pages, 1 figure, uses revtex4, references added in v2 | Phys. Rev. D84 (2011) 127503 | 10.1103/PhysRevD.84.127503 | DIAS-STP-11-11 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Interpreting the cosmological constant as a pressure, whose thermodynamically
conjugate variable is a volume, modifies the first law of black hole
thermodynamics. Properties of the resulting thermodynamic volume are
investigated: the compressibility and the speed of sound of the black hole are
derived in the case of ... | [
{
"created": "Thu, 1 Sep 2011 14:45:27 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Dec 2011 09:43:52 GMT",
"version": "v2"
}
] | 2012-03-07 | [
[
"Dolan",
"Brian P.",
""
]
] | Interpreting the cosmological constant as a pressure, whose thermodynamically conjugate variable is a volume, modifies the first law of black hole thermodynamics. Properties of the resulting thermodynamic volume are investigated: the compressibility and the speed of sound of the black hole are derived in the case of no... |
1402.6211 | Yan Wang | Yan Wang | Likelihood transform: making optimization and parameter estimation
easier | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parameterized optimization and parameter estimation is of great importance in
almost every branch of modern science, technology and engineering. A practical
issue in the problem is that when the parameter space is large and the
available data is noisy, the geometry of the likelihood surface in the
parameter space wil... | [
{
"created": "Tue, 25 Feb 2014 15:50:45 GMT",
"version": "v1"
}
] | 2014-02-26 | [
[
"Wang",
"Yan",
""
]
] | Parameterized optimization and parameter estimation is of great importance in almost every branch of modern science, technology and engineering. A practical issue in the problem is that when the parameter space is large and the available data is noisy, the geometry of the likelihood surface in the parameter space will ... |
1403.7215 | Scott Robertson | Scott Robertson | Integral method for the calculation of Hawking radiation in dispersive
media II. Asymmetric asymptotics | 41 pages, 6 figures | null | 10.1103/PhysRevE.90.053303 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analogue gravity experiments make feasible the realisation of black hole
spacetimes in a laboratory setting and the observational verification of
Hawking radiation. Since such analogue systems are typically dominated by
dispersion, efficient techniques for calculating the predicted Hawking spectrum
in the presence of... | [
{
"created": "Thu, 27 Mar 2014 21:06:28 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Robertson",
"Scott",
""
]
] | Analogue gravity experiments make feasible the realisation of black hole spacetimes in a laboratory setting and the observational verification of Hawking radiation. Since such analogue systems are typically dominated by dispersion, efficient techniques for calculating the predicted Hawking spectrum in the presence of s... |
2210.07673 | Flavio Bombacigno | Flavio Bombacigno, Fabio Moretti, Simon Boudet, Gonzalo J. Olmo | Landau damping for gravitational waves in parity-violating theories | version accepted for publication in JCAP | JCAP02 (2023) 009 | 10.1088/1475-7516/2023/02/009 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We discuss how tensor polarizations of gravitational waves can suffer Landau
damping in the presence of velocity birefringence, when parity symmetry is
explicitly broken. In particular, we analyze the role of the Nieh-Yan and
Chern-Simons terms in modified theories of gravity, showing how the
gravitational perturbati... | [
{
"created": "Fri, 14 Oct 2022 09:56:43 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jan 2023 20:35:25 GMT",
"version": "v2"
}
] | 2023-02-07 | [
[
"Bombacigno",
"Flavio",
""
],
[
"Moretti",
"Fabio",
""
],
[
"Boudet",
"Simon",
""
],
[
"Olmo",
"Gonzalo J.",
""
]
] | We discuss how tensor polarizations of gravitational waves can suffer Landau damping in the presence of velocity birefringence, when parity symmetry is explicitly broken. In particular, we analyze the role of the Nieh-Yan and Chern-Simons terms in modified theories of gravity, showing how the gravitational perturbation... |
1804.10284 | Michael Reisenberger | Michael P Reisenberger | The Poisson brackets of free null initial data for vacuum general
relativity | 55 pages, 2 figures | null | 10.1088/1361-6382/aad569 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A hypersurface composed of two null sheets, or "light fronts", swept out by
the two congruences of future null normal geodesics emerging from a spacelike
2-disk can serve as a Cauchy surface for a region of spacetime. Already in the
1960s free (unconstrained) initial data for vacuum general relativity were
found for ... | [
{
"created": "Thu, 26 Apr 2018 21:36:46 GMT",
"version": "v1"
}
] | 2018-09-05 | [
[
"Reisenberger",
"Michael P",
""
]
] | A hypersurface composed of two null sheets, or "light fronts", swept out by the two congruences of future null normal geodesics emerging from a spacelike 2-disk can serve as a Cauchy surface for a region of spacetime. Already in the 1960s free (unconstrained) initial data for vacuum general relativity were found for hy... |
gr-qc/9405042 | null | Yoav Peleg | Singularity Free Quasi-Classical Schwarzschild Space-Times | 13p + 3 figures , BRX-TH-357 | null | null | null | gr-qc hep-th | null | Using canonical (Schrodinger) quantization of spherically symetric
gravitational dust systems, we find the quasi-classical (coherent) state,
|\alpha^{(s)}>, that corresponds to the classical Schwarzschild solution. We
calculate the ``quasi-classical Schwarzschild mertic", which is the expectation
value of the quantiz... | [
{
"created": "Fri, 20 May 1994 18:52:00 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Peleg",
"Yoav",
""
]
] | Using canonical (Schrodinger) quantization of spherically symetric gravitational dust systems, we find the quasi-classical (coherent) state, |\alpha^{(s)}>, that corresponds to the classical Schwarzschild solution. We calculate the ``quasi-classical Schwarzschild mertic", which is the expectation value of the quantized... |
2110.13822 | Johannes Bl\"umlein | J. Bl\"umlein, A. Maier, P. Marquard, and G. Sch\"afer | The fifth-order post-Newtonian Hamiltonian dynamics of two-body systems
from an effective field theory approach | 42 pages LATEX, several figures, published version | Nucl Phys B983 (2022) 115900 | 10.1016/j.nuclphysb.2022.115900 | DESY 21--151, DO--TH 21/27, SAGEX--21--30 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Within an effective field theory method to general relativity, we calculate
the fifth-order post--Newtonian (5 PN) Hamiltonian dynamics also for the tail
terms, extending earlier work on the potential contributions, working in
harmonic coordinates. Here we calculate independently all (local) 5 PN
contributions to the... | [
{
"created": "Tue, 26 Oct 2021 16:19:17 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2022 17:41:59 GMT",
"version": "v2"
}
] | 2022-08-10 | [
[
"Blümlein",
"J.",
""
],
[
"Maier",
"A.",
""
],
[
"Marquard",
"P.",
""
],
[
"Schäfer",
"G.",
""
]
] | Within an effective field theory method to general relativity, we calculate the fifth-order post--Newtonian (5 PN) Hamiltonian dynamics also for the tail terms, extending earlier work on the potential contributions, working in harmonic coordinates. Here we calculate independently all (local) 5 PN contributions to the t... |
1507.07300 | Chiang-Mei Chen | Chiang-Mei Chen, James M. Nester, Roh-Suan Tung | Gravitational Energy for GR and Poincare Gauge Theories: a Covariant
Hamiltonian Approach | This article is to appear in the Int J Mod Phys D and is to be
published also in the book "One Hundred Years of General Relativity: From
Genesis and Empirical Foundations to Gravitational Waves, Cosmology and
Quantum Gravity," edited by Wei-Tou Ni (World Scientific, Singapore, 2015) | Int. J. Mod. Phys. D24 (2015) 1530026 | 10.1142/S0218271815300268 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our topic concerns a long standing puzzle: the energy of gravitating systems.
More precisely we want to consider, for gravitating systems, how to best
describe energy-momentum and angular momentum/center-of-mass momentum (CoMM).
It is known that these quantities cannot be given by a local density. The
modern understa... | [
{
"created": "Mon, 27 Jul 2015 05:07:12 GMT",
"version": "v1"
}
] | 2015-07-29 | [
[
"Chen",
"Chiang-Mei",
""
],
[
"Nester",
"James M.",
""
],
[
"Tung",
"Roh-Suan",
""
]
] | Our topic concerns a long standing puzzle: the energy of gravitating systems. More precisely we want to consider, for gravitating systems, how to best describe energy-momentum and angular momentum/center-of-mass momentum (CoMM). It is known that these quantities cannot be given by a local density. The modern understand... |
1804.11334 | T. P. Singh | Swanand Khanapurkar, Abhinav Varma, Nehal Mittal, Navya Gupta and
Tejinder P. Singh | Einstein-Cartan-Dirac equations in the Newman-Penrose formalism | 32 pages, 4 figures, Section 5.4 on plane waves rewritten | Phys. Rev. D 98, 064046 (2018) | 10.1103/PhysRevD.98.064046 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate the Einstein-Cartan-Dirac equations in the Newman-Penrose (NP)
formalism, thereby presenting a more accurate and explicit analysis of previous
such studies. The equations show in a transparent way how the Einstein-Dirac
equations are modified by the inclusion of torsion. In particular, the
Hehl-Datta equ... | [
{
"created": "Mon, 30 Apr 2018 17:27:14 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jun 2018 11:15:39 GMT",
"version": "v2"
}
] | 2018-10-03 | [
[
"Khanapurkar",
"Swanand",
""
],
[
"Varma",
"Abhinav",
""
],
[
"Mittal",
"Nehal",
""
],
[
"Gupta",
"Navya",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | We formulate the Einstein-Cartan-Dirac equations in the Newman-Penrose (NP) formalism, thereby presenting a more accurate and explicit analysis of previous such studies. The equations show in a transparent way how the Einstein-Dirac equations are modified by the inclusion of torsion. In particular, the Hehl-Datta equat... |
gr-qc/0601049 | Ujjal Debnath | Ujjal Debnath, Subenoy Chakraborty | Role of Modified Chaplygin Gas as a Dark Energy Model in Collapsing
Spherically Symmetric Cloud | 7 Latex Pages, RexTex style, No figures | Int.J.Theor.Phys.47:2663-2671,2008 | 10.1007/s10773-008-9703-4 | null | gr-qc | null | In this work, gravitational collapse of a spherical cloud, consists of both
dark matter and dark energy in the form of modified Chaplygin gas is studied.
It is found that dark energy alone in the form of modified Chaplygin gas forms
black hole. Also when both components of the fluid are present then the
collapse favo... | [
{
"created": "Thu, 12 Jan 2006 07:26:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Debnath",
"Ujjal",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In this work, gravitational collapse of a spherical cloud, consists of both dark matter and dark energy in the form of modified Chaplygin gas is studied. It is found that dark energy alone in the form of modified Chaplygin gas forms black hole. Also when both components of the fluid are present then the collapse favors... |
1307.1429 | Juan Antonio Nieto | J. A. Nieto | Higher Dimensional Elko Theory | 10 pages, Latex, revised version | Rev. Mex. Fis. 60 (2014) 371-375 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the so called Elko equation can be derived from a 5-dimensional
Dirac equation. We argue that this result can be relevant for dark matter and
cosmological scenarios. We generalize our procedure to higher dimensions.
| [
{
"created": "Wed, 3 Jul 2013 16:27:58 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Aug 2013 16:26:10 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Oct 2013 15:52:32 GMT",
"version": "v3"
},
{
"created": "Mon, 7 Jul 2014 17:30:32 GMT",
"version": "v4"
}
] | 2014-10-10 | [
[
"Nieto",
"J. A.",
""
]
] | We show that the so called Elko equation can be derived from a 5-dimensional Dirac equation. We argue that this result can be relevant for dark matter and cosmological scenarios. We generalize our procedure to higher dimensions. |
2109.09181 | Andreas Lymperis | Niki Drepanou, Andreas Lymperis, Emmanuel N. Saridakis, Kuralay
Yesmakhanova | Kaniadakis holographic dark energy and cosmology | 16 pages, 3 figures | null | 10.1140/epjc/s10052-022-10415-9 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a holographic dark energy scenario based on Kaniadakis entropy,
which is a generalization of Boltzmann-Gibbs entropy that arises from
relativistic statistical theory and is characterized by a single parameter $K$
which quantifies the deviations from standard expressions, and we use the
future event horiz... | [
{
"created": "Sun, 19 Sep 2021 18:08:40 GMT",
"version": "v1"
},
{
"created": "Mon, 16 May 2022 09:23:20 GMT",
"version": "v2"
}
] | 2022-06-01 | [
[
"Drepanou",
"Niki",
""
],
[
"Lymperis",
"Andreas",
""
],
[
"Saridakis",
"Emmanuel N.",
""
],
[
"Yesmakhanova",
"Kuralay",
""
]
] | We construct a holographic dark energy scenario based on Kaniadakis entropy, which is a generalization of Boltzmann-Gibbs entropy that arises from relativistic statistical theory and is characterized by a single parameter $K$ which quantifies the deviations from standard expressions, and we use the future event horizon... |
gr-qc/0106056 | Kayll Lake | Nicholas Neary and Kayll Lake | r-modes in the Tolman VII solution | 3 pages one figure. Further information at
http://grtensor.phy.queensu.ca/rmodes/ Revision includes clarifications | null | null | null | gr-qc astro-ph | null | The r-mode frequencies of the Tolman VII solution for the slowly rotating
non-barotropic approximation within the low frequency regime are estimated. The
relativistic correction to Newtonian r-mode calculations is shown as function
of the tenuity $\frac{R}{M}$ and is shown to be significant only for very
compact neut... | [
{
"created": "Mon, 18 Jun 2001 15:30:50 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jul 2001 18:07:46 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Aug 2001 16:53:35 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Neary",
"Nicholas",
""
],
[
"Lake",
"Kayll",
""
]
] | The r-mode frequencies of the Tolman VII solution for the slowly rotating non-barotropic approximation within the low frequency regime are estimated. The relativistic correction to Newtonian r-mode calculations is shown as function of the tenuity $\frac{R}{M}$ and is shown to be significant only for very compact neutro... |
2401.01532 | Junji Jia | Zonghai Li and Junji Jia | Generating New Spacetimes through Zermelo Navigation | 11 pages, 1 figure; to match the version in PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Zermelo navigation is not only a fundamental tool in Finsler geometry but
also a fundamental approach to the geometrization of dynamics in physics. In
this paper, we consider the Zermelo navigation problem on optical Riemannian
space and, via Zermelo/Randers/spacetime triangle, explore the generation of
new spacetime... | [
{
"created": "Wed, 3 Jan 2024 04:02:52 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 16:27:27 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Li",
"Zonghai",
""
],
[
"Jia",
"Junji",
""
]
] | Zermelo navigation is not only a fundamental tool in Finsler geometry but also a fundamental approach to the geometrization of dynamics in physics. In this paper, we consider the Zermelo navigation problem on optical Riemannian space and, via Zermelo/Randers/spacetime triangle, explore the generation of new spacetimes ... |
gr-qc/9908024 | Massimo Blasone | Massimo Blasone, Yuan-Xing Gui and Francis Vendrell | Geometric Background for Thermal Field Theories | RevTeX, 11 pages, 2 figures | null | null | null | gr-qc hep-th | null | We study a new spacetime which is shown to be the general geometrical
background for Thermal Field Theories at equilibrium. The different formalisms
of Thermal Field Theory are unified in a simple way in this spacetime. The set
of time-paths used in the Path Ordered Method is interpreted in geometrical
terms.
| [
{
"created": "Sat, 7 Aug 1999 18:46:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Blasone",
"Massimo",
""
],
[
"Gui",
"Yuan-Xing",
""
],
[
"Vendrell",
"Francis",
""
]
] | We study a new spacetime which is shown to be the general geometrical background for Thermal Field Theories at equilibrium. The different formalisms of Thermal Field Theory are unified in a simple way in this spacetime. The set of time-paths used in the Path Ordered Method is interpreted in geometrical terms. |
2201.06177 | Sebasti\'an N\'ajera Valencia | Sebasti\'an N\'ajera, Aram Aguilar, Geovanny A. Rave-Franco, Celia
Escamilla-Rivera, Roberto A. Sussman | Inhomogeneous solutions in $f(T,B)$ gravity | 17 pages, accepted for publication in IJGMMP | International Journal of Geometric Methods in Modern Physics 2022 | 10.1142/S0219887822400035 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In this paper we explore the possibility to find exact solutions for
Teleparallel Gravity (TG) of the type of spherically symmetric Lema\^\i
tre-Tolman-Bondi (LTB) dust models. We apply to the LTB metric the formalism of
Teleparallel Gravity in its extension to $f(T,B)$ models, which can be seen it
as the analagous f... | [
{
"created": "Mon, 17 Jan 2022 02:11:41 GMT",
"version": "v1"
}
] | 2022-03-28 | [
[
"Nájera",
"Sebastián",
""
],
[
"Aguilar",
"Aram",
""
],
[
"Rave-Franco",
"Geovanny A.",
""
],
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Sussman",
"Roberto A.",
""
]
] | In this paper we explore the possibility to find exact solutions for Teleparallel Gravity (TG) of the type of spherically symmetric Lema\^\i tre-Tolman-Bondi (LTB) dust models. We apply to the LTB metric the formalism of Teleparallel Gravity in its extension to $f(T,B)$ models, which can be seen it as the analagous fro... |
1910.03763 | Hongguang Liu | Muxin Han, Hongguang Liu | Effective Dynamics from Coherent State Path Integral of Full Loop
Quantum Gravity | 30+10 pages, 2 figures | Phys. Rev. D 101, 046003 (2020) | 10.1103/PhysRevD.101.046003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new routine is proposed to relate Loop Quant Cosmology (LQC) to Loop
Quantum Gravity (LQG) from the perspective of effective dynamics. We derive the
big-bang singularity resolution and big bounce from the first principle of full
canonical LQG. Our results are obtained in the framework of the reduced phase
space qua... | [
{
"created": "Wed, 9 Oct 2019 03:01:45 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Dec 2019 16:16:34 GMT",
"version": "v2"
}
] | 2020-02-12 | [
[
"Han",
"Muxin",
""
],
[
"Liu",
"Hongguang",
""
]
] | A new routine is proposed to relate Loop Quant Cosmology (LQC) to Loop Quantum Gravity (LQG) from the perspective of effective dynamics. We derive the big-bang singularity resolution and big bounce from the first principle of full canonical LQG. Our results are obtained in the framework of the reduced phase space quant... |
1805.03046 | Ken Ng | Ken K. Y. Ng, Salvatore Vitale, Aaron Zimmerman, Katerina
Chatziioannou, Davide Gerosa, Carl-Johan Haster | Gravitational-wave astrophysics with effective-spin measurements:
asymmetries and selection biases | An online generator for synthetic $\chi_{\mathrm{eff}}$ posteriors
can be found at: http://superstring.mit.edu/welcome.html Comments are welcome | Phys. Rev. D 98, 083007 (2018) | 10.1103/PhysRevD.98.083007 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted by coalescing compact objects carry information
about the spin of the individual bodies. However, with present detectors only
the mass-weighted combination of the components of the spin along the orbital
angular momentum can be measured accurately. This quantity, the effective spin
$\chi_{... | [
{
"created": "Fri, 4 May 2018 19:08:37 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Oct 2018 00:58:55 GMT",
"version": "v2"
}
] | 2018-10-24 | [
[
"Ng",
"Ken K. Y.",
""
],
[
"Vitale",
"Salvatore",
""
],
[
"Zimmerman",
"Aaron",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Gerosa",
"Davide",
""
],
[
"Haster",
"Carl-Johan",
""
]
] | Gravitational waves emitted by coalescing compact objects carry information about the spin of the individual bodies. However, with present detectors only the mass-weighted combination of the components of the spin along the orbital angular momentum can be measured accurately. This quantity, the effective spin $\chi_{\m... |
1507.08131 | Farruh Atamurotov | Farruh Atamurotov, Bobomurat Ahmedov and Ahmadjon Abdujabbarov | Optical properties of black hole in the presence of plasma: shadow | 7 pages, 4 figures | null | 10.1103/PhysRevD.92.084005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied photon motion around axially symmetric rotating Kerr black
hole in the presence of plasma with radial power-law density. It is shown that
in the presence of plasma the observed shape and size of shadow changes
depending on i) plasma parameters, ii) black hole spin and iii) inclination
angle between ob... | [
{
"created": "Wed, 29 Jul 2015 13:13:05 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Aug 2015 11:55:51 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Aug 2015 05:56:18 GMT",
"version": "v3"
}
] | 2015-10-21 | [
[
"Atamurotov",
"Farruh",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
]
] | We have studied photon motion around axially symmetric rotating Kerr black hole in the presence of plasma with radial power-law density. It is shown that in the presence of plasma the observed shape and size of shadow changes depending on i) plasma parameters, ii) black hole spin and iii) inclination angle between obse... |
1105.0439 | Daniele Pranzetti | Karim Noui, Alejandro Perez, Daniele Pranzetti | Canonical quantization of non-commutative holonomies in 2+1 loop quantum
gravity | 19 pages, references added. Published version | JHEP 1110 (2011) 036 | 10.1007/JHEP10(2011)036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the canonical quantization of 2+1 gravity with
cosmological constant $\Lambda>0$ in the canonical framework of loop quantum
gravity. The unconstrained phase space of gravity in 2+1 dimensions is
coordinatized by an SU(2) connection $A$ and the canonically conjugate triad
field $e$. A natur... | [
{
"created": "Mon, 2 May 2011 20:52:31 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2011 09:15:02 GMT",
"version": "v2"
}
] | 2012-08-15 | [
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | In this work we investigate the canonical quantization of 2+1 gravity with cosmological constant $\Lambda>0$ in the canonical framework of loop quantum gravity. The unconstrained phase space of gravity in 2+1 dimensions is coordinatized by an SU(2) connection $A$ and the canonically conjugate triad field $e$. A natural... |
1808.08386 | Matthew J. Lake Dr | Matthew J. Lake and Bernard Carr | Does Compton/Schwarzschild duality in higher dimensions exclude TeV
quantum gravity? | This paper supersedes and differs considerably from arXiv:1611.01913.
The abstract is similar but the title and main text are changed. The earlier
paper contains discussion of additional points which are not essential for
this paper. 31 pages, 5 figures. Published version (v1). Minor typos in the
Abstract corre... | International Journal of Modern Physics D, 1930001 (2018) | 10.1142/S0218271819300015 | null | gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In three spatial dimensions, the Compton wavelength $(R_C \propto M^{-1}$)
and Schwarzschild radius $(R_S \propto M$) are dual under the transformation $M
\rightarrow M_{P}^2/M$, where $M_{P}$ is the Planck mass. This suggests that
there could be a fundamental link -- termed the Black Hole Uncertainty
Principle or Co... | [
{
"created": "Sat, 25 Aug 2018 09:18:07 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Dec 2018 11:27:35 GMT",
"version": "v2"
}
] | 2019-01-23 | [
[
"Lake",
"Matthew J.",
""
],
[
"Carr",
"Bernard",
""
]
] | In three spatial dimensions, the Compton wavelength $(R_C \propto M^{-1}$) and Schwarzschild radius $(R_S \propto M$) are dual under the transformation $M \rightarrow M_{P}^2/M$, where $M_{P}$ is the Planck mass. This suggests that there could be a fundamental link -- termed the Black Hole Uncertainty Principle or Comp... |
2112.12964 | Sijo Joseph K. | Sijo K. Joseph | Weyl Geometry and Quantum Corrections | null | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | Recent research in the geometric formulation of quantum theory has implied
that Weyl Geometry can be used to merge quantum theory and general relativity
consistently as classical field theories. In the Weyl Geometric framework, it
seems that both quantum theory and gravity can merge consistently, once quantum
theory ... | [
{
"created": "Fri, 24 Dec 2021 06:38:02 GMT",
"version": "v1"
}
] | 2021-12-28 | [
[
"Joseph",
"Sijo K.",
""
]
] | Recent research in the geometric formulation of quantum theory has implied that Weyl Geometry can be used to merge quantum theory and general relativity consistently as classical field theories. In the Weyl Geometric framework, it seems that both quantum theory and gravity can merge consistently, once quantum theory is... |
2203.15440 | Gianmassimo Tasinato | Gianmassimo Tasinato | Gravitational wave non-linearities and pulsar-timing array angular
correlations | 9 pages plus appendixes, 4 figures | null | 10.1103/PhysRevD.105.083506 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several pulsar-timing array (PTA) collaborations are finding tantalising
hints for a stochastic gravitational wave background signal in the nano-Hertz
regime. So far, though, no convincing evidence for the expected Hellings-Downs
quadrupolar correlations has been found. While this issue might get fixed at
the light o... | [
{
"created": "Tue, 29 Mar 2022 11:16:46 GMT",
"version": "v1"
}
] | 2022-04-20 | [
[
"Tasinato",
"Gianmassimo",
""
]
] | Several pulsar-timing array (PTA) collaborations are finding tantalising hints for a stochastic gravitational wave background signal in the nano-Hertz regime. So far, though, no convincing evidence for the expected Hellings-Downs quadrupolar correlations has been found. While this issue might get fixed at the light of ... |
2308.00342 | Qiming Fu | Qi-Ming Fu, Meng-Ci He, Tao-Tao Sui, and Xin Zhang | Reconstruction of aether scalar tensor theory for various cosmological
scenarios | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present several explicit reconstructions for {the aether
scalar tensor (AeST) theory} derived from the background of
Friedmann-Lema$\hat{\text{\i}}$tre-Robertson-Walker cosmological evolution. It
is shown that the Einstein-Hilbert Lagrangian with a positive cosmological
constant is the only Lagrangi... | [
{
"created": "Tue, 1 Aug 2023 07:37:39 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2024 03:25:03 GMT",
"version": "v2"
}
] | 2024-03-15 | [
[
"Fu",
"Qi-Ming",
""
],
[
"He",
"Meng-Ci",
""
],
[
"Sui",
"Tao-Tao",
""
],
[
"Zhang",
"Xin",
""
]
] | In this paper, we present several explicit reconstructions for {the aether scalar tensor (AeST) theory} derived from the background of Friedmann-Lema$\hat{\text{\i}}$tre-Robertson-Walker cosmological evolution. It is shown that the Einstein-Hilbert Lagrangian with a positive cosmological constant is the only Lagrangian... |
2012.06064 | Ugur Camci | Ugur Camci | Three-dimensional black holes via Noether symmetries | 29 pages, 1 table, no figures, to appear in Physical Review D | null | 10.1103/PhysRevD.103.024001 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the Noether symmetries of the Lagrangian for the stationary
rotating BTZ-type three-dimensional spacetimes in $f(R)$ theory of gravity. A
detailed analysis of Noether symmetries of (2+1)-dimensional rotating BTZ-type
black hole spacetime model is presented. Applying the Noether symmetry
approach, the f... | [
{
"created": "Fri, 11 Dec 2020 01:04:39 GMT",
"version": "v1"
}
] | 2021-01-13 | [
[
"Camci",
"Ugur",
""
]
] | We investigate the Noether symmetries of the Lagrangian for the stationary rotating BTZ-type three-dimensional spacetimes in $f(R)$ theory of gravity. A detailed analysis of Noether symmetries of (2+1)-dimensional rotating BTZ-type black hole spacetime model is presented. Applying the Noether symmetry approach, the fir... |
0908.3320 | Edmundo M. Monte | Edmundo M. Monte | Embedding Versus Immersion in General Relativity | 5 pages | Int.J.Mod.Phys.A24:1501-1504,2009 | 10.1142/S0217751X09044887 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly discuss the concepts of immersion and embedding of space-times in
higher-dimensional spaces. We revisit the classical work by Kasner in which he
constructs a model of immersion of the Schwarzschild exterior solution into a
six-dimensional pseudo-Euclidean manifold. We show that, from a physical point
of vi... | [
{
"created": "Sun, 23 Aug 2009 17:37:50 GMT",
"version": "v1"
}
] | 2009-08-26 | [
[
"Monte",
"Edmundo M.",
""
]
] | We briefly discuss the concepts of immersion and embedding of space-times in higher-dimensional spaces. We revisit the classical work by Kasner in which he constructs a model of immersion of the Schwarzschild exterior solution into a six-dimensional pseudo-Euclidean manifold. We show that, from a physical point of view... |
0911.1425 | Irene Brito | I. Brito, J. Carot, E.G.L.R. Vaz | General spherically symmetric elastic stars in Relativity | 23 pages | Gen.Rel.Grav.42:2357-2382,2010 | 10.1007/s10714-010-0980-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relativistic theory of elasticity is reviewed within the spherically
symmetric context with a view towards the modeling of star interiors possessing
elastic properties such as theones expected in neutron stars. Emphasis is
placed on generality in the main sections of the paper, and the results are
then applied to... | [
{
"created": "Sat, 7 Nov 2009 15:32:33 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Brito",
"I.",
""
],
[
"Carot",
"J.",
""
],
[
"Vaz",
"E. G. L. R.",
""
]
] | The relativistic theory of elasticity is reviewed within the spherically symmetric context with a view towards the modeling of star interiors possessing elastic properties such as theones expected in neutron stars. Emphasis is placed on generality in the main sections of the paper, and the results are then applied to s... |
2004.08225 | Benito A. Ju\'arez-Aubry | Michael Good, Benito A. Ju\'arez-Aubry, Dimitris Moustos, Maksat
Temirkhan | Unruh-like effects: Effective temperatures along stationary worldlines | 26 pages, 9 figures | JHEP 06 (2020) 059 | 10.1007/JHEP06(2020)059 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the detailed balance temperatures recorded along all classes of
stationary, uniformly accelerated worldlines in four-dimensional Minkowski
spacetime, namely along (i) linear uniform acceleration, (ii) cusped, (iii)
circular, (iv) catenary, and (v) helix worldlines, among which the Unruh
temperature is the pa... | [
{
"created": "Fri, 17 Apr 2020 13:10:52 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jun 2020 19:48:06 GMT",
"version": "v2"
}
] | 2020-06-17 | [
[
"Good",
"Michael",
""
],
[
"Juárez-Aubry",
"Benito A.",
""
],
[
"Moustos",
"Dimitris",
""
],
[
"Temirkhan",
"Maksat",
""
]
] | We study the detailed balance temperatures recorded along all classes of stationary, uniformly accelerated worldlines in four-dimensional Minkowski spacetime, namely along (i) linear uniform acceleration, (ii) cusped, (iii) circular, (iv) catenary, and (v) helix worldlines, among which the Unruh temperature is the part... |
2005.13504 | Philippe G. LeFloch | Florian Beyer and Philippe G. LeFloch | A numerical algorithm for Fuchsian equations and fluid flows on
cosmological spacetimes | 30 pages | null | 10.1016/j.jcp.2021.110145 | null | gr-qc cs.NA math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a class of Fuchsian equations that, for instance, describes the
evolution of compressible fluid flows on a cosmological spacetime. Using the
method of lines, we introduce a numerical algorithm for the singular initial
value problem when data are imposed on the cosmological singularity and the
evolution is... | [
{
"created": "Wed, 27 May 2020 17:28:51 GMT",
"version": "v1"
}
] | 2021-03-17 | [
[
"Beyer",
"Florian",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We consider a class of Fuchsian equations that, for instance, describes the evolution of compressible fluid flows on a cosmological spacetime. Using the method of lines, we introduce a numerical algorithm for the singular initial value problem when data are imposed on the cosmological singularity and the evolution is p... |
1310.7949 | Prayush Kumar | Prayush Kumar, Ilana MacDonald, Duncan A. Brown, Harald P. Pfeiffer,
Kipp Cannon, Michael Boyle, Lawrence E. Kidder, Abdul H. Mroue, Mark A.
Scheel, Bela Szilagyi, Anil Zenginoglu | Template Banks for Binary black hole searches with Numerical Relativity
waveforms | 16 pages, 21 figures | Phys. Rev. D 89, 042002 (2014) | 10.1103/PhysRevD.89.042002 | LIGO Document P1300176 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GW) from coalescing stellar-mass black hole binaries
(BBH) are expected to be detected by the Advanced Laser Interferometer
Gravitational-wave Observatory and Advanced Virgo. Detection searches operate
by matched-filtering the detector data using a bank of waveform templates.
Traditionally, templ... | [
{
"created": "Tue, 29 Oct 2013 20:02:19 GMT",
"version": "v1"
}
] | 2014-02-26 | [
[
"Kumar",
"Prayush",
""
],
[
"MacDonald",
"Ilana",
""
],
[
"Brown",
"Duncan A.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Cannon",
"Kipp",
""
],
[
"Boyle",
"Michael",
""
],
[
"Kidder",
"Lawrence E.",
""
]... | Gravitational waves (GW) from coalescing stellar-mass black hole binaries (BBH) are expected to be detected by the Advanced Laser Interferometer Gravitational-wave Observatory and Advanced Virgo. Detection searches operate by matched-filtering the detector data using a bank of waveform templates. Traditionally, templat... |
2403.17179 | Stefano Schmidt | Stefano Schmidt and Sarah Caudill | A novel signal-consistency test for gravitational-wave searches of
generic black hole binaries | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We propose a novel signal-consistency test applicable to a broad search for
gravitational waves emitted by generic binary black hole (BBH) systems. The
test generalizes the time domain $\xi^2$ signal-consistency test currently
utilized by the GstLAL pipeline, which quantifies the discrepancy between the
expected sign... | [
{
"created": "Mon, 25 Mar 2024 20:44:52 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2024 14:29:55 GMT",
"version": "v2"
}
] | 2024-06-26 | [
[
"Schmidt",
"Stefano",
""
],
[
"Caudill",
"Sarah",
""
]
] | We propose a novel signal-consistency test applicable to a broad search for gravitational waves emitted by generic binary black hole (BBH) systems. The test generalizes the time domain $\xi^2$ signal-consistency test currently utilized by the GstLAL pipeline, which quantifies the discrepancy between the expected signal... |
gr-qc/0509062 | Kirill Bronnikov | K.A. Bronnikov, S.V. Grinyok | Electrically charged and neutral wormhole instability in scalar-tensor
gravity | 7 pages, no figures; gc, cite styles. A talk at the International
Conference on Cosmoparticle Physics ``Cosmion-2004'' (Moscow, September 2004) | Grav.Cosmol. 11 (2005) 75-81 | null | null | gr-qc | null | We study the stability of static, spherically symmetric, traversable
wormholes with or without an electric charge, existing due to conformal
continuations in a class of scalar-tensor theories with zero scalar field
potential (so that Penney's or Fisher's well-known solutions hold in the
Einstein conformal frame). Spe... | [
{
"created": "Thu, 15 Sep 2005 17:12:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Grinyok",
"S. V.",
""
]
] | We study the stability of static, spherically symmetric, traversable wormholes with or without an electric charge, existing due to conformal continuations in a class of scalar-tensor theories with zero scalar field potential (so that Penney's or Fisher's well-known solutions hold in the Einstein conformal frame). Speci... |
gr-qc/0405051 | Yuan-Zhong Zhang | K.K. Nandi and Yuan-Zhong Zhang | On Traversable Lorentzian Wormholes in the Vacuum Low Energy Effective
String Theory in Einstein and Jordan Frames | 18 pages | Phys.Rev. D70 (2004) 044040 | 10.1103/PhysRevD.70.044040 | null | gr-qc | null | Three new classes (II-IV) of solutions of the vacuum low energy effective
string theory in four dimensions are derived. Wormhole solutions are
investigated in those solutions including the class I case both in the Einstein
and in the Jordan (string) frame. It turns out that, of the eight classes of
solutions investig... | [
{
"created": "Mon, 10 May 2004 01:17:19 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jun 2004 07:06:23 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Nandi",
"K. K.",
""
],
[
"Zhang",
"Yuan-Zhong",
""
]
] | Three new classes (II-IV) of solutions of the vacuum low energy effective string theory in four dimensions are derived. Wormhole solutions are investigated in those solutions including the class I case both in the Einstein and in the Jordan (string) frame. It turns out that, of the eight classes of solutions investigat... |
1106.3721 | Ishwaree Neupane | Ishwaree P. Neupane | We Probably Live On An Inflating Brane-World | 8 pages, latex (Essay received Honourable mention in Gravity Research
Foundation essay competition 2011) | Int. J. Mod. Phys. D20 (2011) 2809-2816 | 10.1142/S0218271811020627 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Brane-world models where observers are trapped within the thickness of a
3-brane offer novel perspectives on gravitation and cosmology. In this essay, I
would argue that the problem of a late epoch acceleration of the universe is
well explained in the framework of a 4-dimensional de Sitter universe embedded
in a 5-di... | [
{
"created": "Sun, 19 Jun 2011 08:39:19 GMT",
"version": "v1"
}
] | 2012-02-20 | [
[
"Neupane",
"Ishwaree P.",
""
]
] | Brane-world models where observers are trapped within the thickness of a 3-brane offer novel perspectives on gravitation and cosmology. In this essay, I would argue that the problem of a late epoch acceleration of the universe is well explained in the framework of a 4-dimensional de Sitter universe embedded in a 5-dime... |
gr-qc/0205062 | Slava G. Turyshev | Slava G. Turyshev | Relativistic stellar aberration for the Space Interferometry Mission (2) | 40 pages, 5 figures | null | null | null | gr-qc | null | We address the issue of relativistic stellar aberration requirements for the
Space Interferometry Mission (SIM). Motivated by the importance of this issue
for SIM, we have considered a problem of relative astrometric observations of
two stars separated by angle $\theta$ on the sky with a single baseline
interferomete... | [
{
"created": "Wed, 15 May 2002 22:00:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
]
] | We address the issue of relativistic stellar aberration requirements for the Space Interferometry Mission (SIM). Motivated by the importance of this issue for SIM, we have considered a problem of relative astrometric observations of two stars separated by angle $\theta$ on the sky with a single baseline interferometer.... |
2403.03106 | Kristina Giesel | Alba Domi, Thomas Eberl, Max Joseph Fahn, Kristina Giesel, Lukas
Hennig, Ulrich Katz, Roman Kemper and Michael Kobler | Understanding gravitationally induced decoherence parameters in neutrino
oscillations using a microscopic quantum mechanical model | 27 pages, 8 figures, updated the color of the axis in figure 1,
extended the discussion in the conclusion and updated some references | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a microscopic quantum mechanical model for gravitationally
induced decoherence introduced by Blencowe and Xu is investigated in the
context of neutrino oscillations. The focus is on the comparison with existing
phenomenological models and the physical interpretation of the decoherence
parameters in such... | [
{
"created": "Tue, 5 Mar 2024 16:48:23 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2024 18:43:21 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Apr 2024 17:53:52 GMT",
"version": "v3"
}
] | 2024-04-16 | [
[
"Domi",
"Alba",
""
],
[
"Eberl",
"Thomas",
""
],
[
"Fahn",
"Max Joseph",
""
],
[
"Giesel",
"Kristina",
""
],
[
"Hennig",
"Lukas",
""
],
[
"Katz",
"Ulrich",
""
],
[
"Kemper",
"Roman",
""
],
[
"Kobler... | In this work, a microscopic quantum mechanical model for gravitationally induced decoherence introduced by Blencowe and Xu is investigated in the context of neutrino oscillations. The focus is on the comparison with existing phenomenological models and the physical interpretation of the decoherence parameters in such m... |
1106.4122 | Folkert Mueller-Hoissen | Aristophanes Dimakis, Nils Kanning, Folkert M\"uller-Hoissen | The Non-Autonomous Chiral Model and the Ernst Equation of General
Relativity in the Bidifferential Calculus Framework | null | SIGMA 7 (2011), 118, 27 pages | 10.3842/SIGMA.2011.118 | null | gr-qc math-ph math.MP nlin.SI | http://creativecommons.org/licenses/by-nc-sa/3.0/ | The non-autonomous chiral model equation for an $m \times m$ matrix function
on a two-dimensional space appears in particular in general relativity, where
for $m=2$ a certain reduction of it determines stationary, axially symmetric
solutions of Einstein's vacuum equations, and for $m=3$ solutions of the
Einstein-Maxw... | [
{
"created": "Tue, 21 Jun 2011 08:23:51 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Dec 2011 06:09:27 GMT",
"version": "v2"
}
] | 2011-12-26 | [
[
"Dimakis",
"Aristophanes",
""
],
[
"Kanning",
"Nils",
""
],
[
"Müller-Hoissen",
"Folkert",
""
]
] | The non-autonomous chiral model equation for an $m \times m$ matrix function on a two-dimensional space appears in particular in general relativity, where for $m=2$ a certain reduction of it determines stationary, axially symmetric solutions of Einstein's vacuum equations, and for $m=3$ solutions of the Einstein-Maxwel... |
1605.02058 | Bobir Toshmatov | Bobir Toshmatov, Zden\v{e}k Stuchl\'ik, Jan Schee, Bobomurat Ahmedov | Quasinormal frequencies of black hole in the braneworld | 12 pages, 10 figures, 2 tables | Phys. Rev. D 93, 124017 (2016) | 10.1103/PhysRevD.93.124017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied scalar, electromagnetic and gravitational perturbations of
the four-dimensional Reissner-Nordstr\"{o}m-like black holes with a
\textit{tidal charge} in the Randall-Sundrum braneworld. The quasinormal modes
of these scalar, electromagnetic, as well as axial and polar gravitational
perturbations, have b... | [
{
"created": "Fri, 6 May 2016 19:44:54 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2016 12:45:24 GMT",
"version": "v2"
}
] | 2016-06-08 | [
[
"Toshmatov",
"Bobir",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Schee",
"Jan",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | We have studied scalar, electromagnetic and gravitational perturbations of the four-dimensional Reissner-Nordstr\"{o}m-like black holes with a \textit{tidal charge} in the Randall-Sundrum braneworld. The quasinormal modes of these scalar, electromagnetic, as well as axial and polar gravitational perturbations, have bee... |
1008.3324 | Wen-Biao Han | Wen-Biao Han | Gravitational Radiations from a Spinning Compact Object around a
supermassive Kerr black hole in circular orbit | 16 pages, 17 figures. The last version for publication | Phys.Rev.D82:084013,2010 | 10.1103/PhysRevD.82.084013 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational waves and energy radiations from a spinning compact object
with stellar mass in a circular orbit in the equatorial plane of a supermassive
Kerr black hole are investigated in this paper. The effect how the spin acts on
energy and angular moment fluxes is discussed in detail. The calculation
results ... | [
{
"created": "Thu, 19 Aug 2010 15:09:34 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Aug 2010 01:16:09 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Oct 2010 17:26:50 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Han",
"Wen-Biao",
""
]
] | The gravitational waves and energy radiations from a spinning compact object with stellar mass in a circular orbit in the equatorial plane of a supermassive Kerr black hole are investigated in this paper. The effect how the spin acts on energy and angular moment fluxes is discussed in detail. The calculation results in... |
gr-qc/0406090 | Salvatore Antoci | Salvatore Antoci, Dierck-Ekkehard Liebscher | Reinstating Schwarzschild's original manifold and its singularity | 38 pages, 4 figures. Misprints corrected. To appear in: "General
Relativity Research Trends", Horizons in World Physics, vol. 249, Nova
Science Publishers | "General Relativity Research Trends", Albert Reimer ed., pp.
177-213, Nova Science Publishers, New York (2006) | null | null | gr-qc | null | The content of this review is summarized here through the titles of its
sections, as follows:
1. Introduction: Schwarzschild's original solution and the ``Schwarzschild
solution''.
2. The wrong arrow of time of Hilbert's manifold is at the origin of the
Kruskal extension.
3. An invariant, local, intrinsic quant... | [
{
"created": "Tue, 22 Jun 2004 13:34:22 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Sep 2005 13:05:24 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Antoci",
"Salvatore",
""
],
[
"Liebscher",
"Dierck-Ekkehard",
""
]
] | The content of this review is summarized here through the titles of its sections, as follows: 1. Introduction: Schwarzschild's original solution and the ``Schwarzschild solution''. 2. The wrong arrow of time of Hilbert's manifold is at the origin of the Kruskal extension. 3. An invariant, local, intrinsic quantity that... |
0710.5017 | Jonathan Engle | Jonathan Engle, Roberto Pereira | Coherent states, constraint classes, and area operators in the new
spin-foam models | 21 pages; statements about gamma limits made more precise, and minor
phrasing changes | Class.Quant.Grav.25:105010,2008 | 10.1088/0264-9381/25/10/105010 | null | gr-qc | null | Recently, two new spin-foam models have appeared in the literature, both
motivated by a desire to modify the Barrett-Crane model in such a way that the
imposition of certain second class constraints, called cross-simplicity
constraints, are weakened. We refer to these two models as the FKLS model, and
the flipped mod... | [
{
"created": "Fri, 26 Oct 2007 08:03:02 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Nov 2007 14:31:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Engle",
"Jonathan",
""
],
[
"Pereira",
"Roberto",
""
]
] | Recently, two new spin-foam models have appeared in the literature, both motivated by a desire to modify the Barrett-Crane model in such a way that the imposition of certain second class constraints, called cross-simplicity constraints, are weakened. We refer to these two models as the FKLS model, and the flipped model... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.