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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9701024 | Vitorio Alberto De Lorenci | Vitorio A. De Lorenci, Jerome Martin, Nelson Pinto-Neto and Ivano
Damiao Soares | Topology Change in Canonical Quantum Cosmology | 23 pages, LaTex file. We added in the conclusion some comments about
path integral formalism and corrected litle misprintings | Phys.Rev. D56 (1997) 3329-3340 | 10.1103/PhysRevD.56.3329 | Notas de Fisica CBPF-NF 002/97 | gr-qc | null | We develop the canonical quantization of a midisuperspace model which
contains, as a subspace, a minisuperspace constituted of a
Friedman-Lema\^{\i}tre-Robertson-Walker Universe filled with homogeneous scalar
and dust fields, where the sign of the intrinsic curvature of the spacelike
hypersurfaces of homogeneity is n... | [
{
"created": "Sun, 12 Jan 1997 19:14:00 GMT",
"version": "v1"
},
{
"created": "Mon, 5 May 1997 20:51:44 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"De Lorenci",
"Vitorio A.",
""
],
[
"Martin",
"Jerome",
""
],
[
"Pinto-Neto",
"Nelson",
""
],
[
"Soares",
"Ivano Damiao",
""
]
] | We develop the canonical quantization of a midisuperspace model which contains, as a subspace, a minisuperspace constituted of a Friedman-Lema\^{\i}tre-Robertson-Walker Universe filled with homogeneous scalar and dust fields, where the sign of the intrinsic curvature of the spacelike hypersurfaces of homogeneity is not... |
gr-qc/9803005 | Jorge Pullin | Jorge Pullin | Colliding black holes: analytic insights | 19 pages, crckapb.sty, 7 figures included with psfig, talk given at
GR15, Poona, India, to appear in the proceedings | null | null | CGPG-98/2-4 | gr-qc | null | We summarize the state of the art of the ``close approximation'' to black
hole collisions. We discuss results to first and second order in perturbation
theory for head-on collisions of momentarily-stationary and non-stationary
black holes and discuss the near-future prospect of non-axisymmetric
collisions.
| [
{
"created": "Mon, 2 Mar 1998 03:35:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pullin",
"Jorge",
""
]
] | We summarize the state of the art of the ``close approximation'' to black hole collisions. We discuss results to first and second order in perturbation theory for head-on collisions of momentarily-stationary and non-stationary black holes and discuss the near-future prospect of non-axisymmetric collisions. |
gr-qc/0609008 | Sean A. Hayward | Sean A. Hayward | Angular momentum conservation for dynamical black holes | 12 revtex4 pages, 3 eps figures. Version to be published, with minor
improvements | Phys.Rev.D74:104013,2006 | 10.1103/PhysRevD.74.104013 | null | gr-qc | null | Angular momentum can be defined by rearranging the Komar surface integral in
terms of a twist form, encoding the twisting around of space-time due to a
rotating mass, and an axial vector. If the axial vector is a coordinate vector
and has vanishing transverse divergence, it can be uniquely specified under
certain gen... | [
{
"created": "Mon, 4 Sep 2006 11:06:19 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Nov 2006 04:57:41 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hayward",
"Sean A.",
""
]
] | Angular momentum can be defined by rearranging the Komar surface integral in terms of a twist form, encoding the twisting around of space-time due to a rotating mass, and an axial vector. If the axial vector is a coordinate vector and has vanishing transverse divergence, it can be uniquely specified under certain gener... |
gr-qc/0112013 | Andrea Vicere | Andrea Vicer\'e | Optimal detection of burst events in gravitational wave interferometric
observatories | 21 pages, 5 figures in 3 groups. Submitted for publication to
Phys.Rev.D. A Mathematica notebook is available at
http://www.ligo.caltech.edu/~avicere/nda/burst/Burst.nb which allows to
reproduce the numerical results of the paper | Phys.Rev. D66 (2002) 062002 | 10.1103/PhysRevD.66.062002 | LIGO-P010019-01-E | gr-qc | null | We consider the problem of detecting a burst signal of unknown shape. We
introduce a statistic which generalizes the excess power statistic proposed by
Flanagan and Hughes and extended by Anderson et al. The statistic we propose is
shown to be optimal for arbitrary noise spectral characteristic, under the two
hypothe... | [
{
"created": "Sat, 8 Dec 2001 07:48:26 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Viceré",
"Andrea",
""
]
] | We consider the problem of detecting a burst signal of unknown shape. We introduce a statistic which generalizes the excess power statistic proposed by Flanagan and Hughes and extended by Anderson et al. The statistic we propose is shown to be optimal for arbitrary noise spectral characteristic, under the two hypothese... |
1805.03035 | Sandipan Sengupta | Sandipan Sengupta | Time travel in vacuum spacetimes | null | Phys. Rev. D 97, 124038 (2018) | 10.1103/PhysRevD.97.124038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The possibility of time travel through the geodesics of vacuum solutions in
first order gravity is explored. We present explicit examples of such
geometries, which contain degenerate as well as nondegenerate tetrad fields
that are sewn together continuously over different regions of the spacetime.
These classical sol... | [
{
"created": "Fri, 4 May 2018 08:29:24 GMT",
"version": "v1"
}
] | 2018-06-29 | [
[
"Sengupta",
"Sandipan",
""
]
] | The possibility of time travel through the geodesics of vacuum solutions in first order gravity is explored. We present explicit examples of such geometries, which contain degenerate as well as nondegenerate tetrad fields that are sewn together continuously over different regions of the spacetime. These classical solut... |
2311.15252 | Daoqiang Liu | Daoqiang Liu | Tilted spacetime positive mass theorem with arbitrary ends | 19 pages, 3 figures. Comments are welcome! | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we prove the spacetime positive mass theorem for
asymptotically flat spin initial data sets with arbitrary ends and a
non-compact boundary. Moreover, we demonstrate a quantitative shielding
theorem, subject to the tilted boundary dominant energy condition. Our results
are established by solving a mixed... | [
{
"created": "Sun, 26 Nov 2023 09:53:43 GMT",
"version": "v1"
}
] | 2023-11-28 | [
[
"Liu",
"Daoqiang",
""
]
] | In this paper, we prove the spacetime positive mass theorem for asymptotically flat spin initial data sets with arbitrary ends and a non-compact boundary. Moreover, we demonstrate a quantitative shielding theorem, subject to the tilted boundary dominant energy condition. Our results are established by solving a mixed b... |
2403.13308 | Luciano Combi | Luciano Combi and Sean M. Ressler | A binary black hole metric approximation from inspiral to merger | Version to be submitted to PRD. Comments are welcome | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a semi-analytic binary black hole (BBH) metric approximation that
models the entire evolution of the system from inspiral to merger. The metric
is constructed as a boosted Kerr-Schild superposition following post-Newtonian
(PN) trajectories at the fourth PN order in the inspiral phase. During merger,
we in... | [
{
"created": "Wed, 20 Mar 2024 05:16:43 GMT",
"version": "v1"
}
] | 2024-03-21 | [
[
"Combi",
"Luciano",
""
],
[
"Ressler",
"Sean M.",
""
]
] | We present a semi-analytic binary black hole (BBH) metric approximation that models the entire evolution of the system from inspiral to merger. The metric is constructed as a boosted Kerr-Schild superposition following post-Newtonian (PN) trajectories at the fourth PN order in the inspiral phase. During merger, we inte... |
0704.1871 | Andres Balaguera | A. Balaguera-Antolinez, M. Nowakowski | From Global to Local Dynamics: Effects of the Expansion on Astrophysical
Structures | References added To be published in CQG | Class.Quant.Grav.24:2677-2688,2007 | 10.1088/0264-9381/24/10/013 | null | gr-qc | null | We explore the effects of background cosmology on large scale structures with
non-spherical symmetry by using the concept of quasi-equilibrium which allows
certain internal properties (e.g. angular velocity) of the bodies to change
with time. In accordance with the discovery of the accelerated phase of the
universe w... | [
{
"created": "Sat, 14 Apr 2007 16:49:41 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Apr 2007 16:37:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Balaguera-Antolinez",
"A.",
""
],
[
"Nowakowski",
"M.",
""
]
] | We explore the effects of background cosmology on large scale structures with non-spherical symmetry by using the concept of quasi-equilibrium which allows certain internal properties (e.g. angular velocity) of the bodies to change with time. In accordance with the discovery of the accelerated phase of the universe we ... |
0704.1035 | Hamid Reza Sepangi | M. Heydari-Fard and H. R. Sepangi | Anisotropic brane gravity with a confining potential | 14 pages, 3 figures, to appear in PLB | Phys.Lett.B649:1-11,2007 | 10.1016/j.physletb.2007.04.008 | null | gr-qc hep-th | null | We consider an anisotropic brane world with Bianchi type I and V geometries
where the mechanism of confining the matter on the brane is through the use of
a confining potential. The resulting equations on the anisotropic brane are
modified by an extra term that may be interpreted as the x-matter, providing a
possible... | [
{
"created": "Sun, 8 Apr 2007 17:01:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Heydari-Fard",
"M.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We consider an anisotropic brane world with Bianchi type I and V geometries where the mechanism of confining the matter on the brane is through the use of a confining potential. The resulting equations on the anisotropic brane are modified by an extra term that may be interpreted as the x-matter, providing a possible p... |
1104.1384 | Aleksandar Mikovic | A. Mikovic and M. Vojinovic | Effective action and semiclassical limit of spin foam models | Improved presentation, 2 references added. 15 pages, no figures | Class. Quant. Grav. 28, 225004 (2011) | 10.1088/0264-9381/28/22/225004 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define an effective action for spin foam models of quantum gravity by
adapting the background field method from quantum field theory. We show that
the Regge action is the leading term in the semi-classical expansion of the
spin foam effective action if the vertex amplitude has the large-spin
asymptotics which is p... | [
{
"created": "Thu, 7 Apr 2011 17:12:43 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Aug 2011 09:19:23 GMT",
"version": "v2"
}
] | 2011-11-01 | [
[
"Mikovic",
"A.",
""
],
[
"Vojinovic",
"M.",
""
]
] | We define an effective action for spin foam models of quantum gravity by adapting the background field method from quantum field theory. We show that the Regge action is the leading term in the semi-classical expansion of the spin foam effective action if the vertex amplitude has the large-spin asymptotics which is pro... |
1809.00555 | Branislav Cvetkovi\'c | B. Cvetkovi\'c and D. Simi\'c | Near-horizon geometry with torsion | LaTeX, 14 pages; v2: section 3 extended | Phys. Rev. D 99, 024032 (2019) | 10.1103/PhysRevD.99.024032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate near-horizon geometry of the rotating Ba\~nados Teiteilboim
Zanelli (BTZ) black hole with torsion. Our main motivation is to gain insight
into the role of torsion in the near-horizon geometry, which is well understood
in the Riemannian case. We obtain that near-horizon geometry represents a
generalizat... | [
{
"created": "Mon, 3 Sep 2018 11:21:07 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2019 11:32:53 GMT",
"version": "v2"
}
] | 2019-02-21 | [
[
"Cvetković",
"B.",
""
],
[
"Simić",
"D.",
""
]
] | We investigate near-horizon geometry of the rotating Ba\~nados Teiteilboim Zanelli (BTZ) black hole with torsion. Our main motivation is to gain insight into the role of torsion in the near-horizon geometry, which is well understood in the Riemannian case. We obtain that near-horizon geometry represents a generalizatio... |
1209.4871 | Eduardo Bittencourt | M. Novello and E. Bittencourt | What is the origin of the mass of the Higgs boson? | 7 pages. arXiv admin note: substantial text overlap with
arXiv:1111.4228, arXiv:1008.2371 | Phys Rev D., vol. 86 063510 (2012) | 10.1103/PhysRevD.86.063510 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to present a unified description of mass
generation mechanisms that have been investigated so far and that are called
the Mach and Higgs proposals. In our mechanism, gravity acts merely as a
catalyst and the final expression of the mass depends neither on the intensity
nor on the particul... | [
{
"created": "Fri, 21 Sep 2012 17:46:36 GMT",
"version": "v1"
}
] | 2013-09-24 | [
[
"Novello",
"M.",
""
],
[
"Bittencourt",
"E.",
""
]
] | The purpose of this paper is to present a unified description of mass generation mechanisms that have been investigated so far and that are called the Mach and Higgs proposals. In our mechanism, gravity acts merely as a catalyst and the final expression of the mass depends neither on the intensity nor on the particular... |
1507.08651 | Saeed Rastgoo | Hugo A. Morales-T\'ecotl, Daniel H. Orozco-Borunda, Saeed Rastgoo | Polymer quantization and the saddle point approximation of partition
functions | 18 pages, 2 figures. Minor corrections based on PRD referee report.
Final version matching the one published in PRD | Phys. Rev. D 92, 104029 (2015) | 10.1103/PhysRevD.92.104029 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The saddle point approximation of the path integral partition functions is an
important way of deriving the thermodynamical properties of black holes.
However, there are certain black hole models and some mathematically analog
mechanical models for which this method cannot be applied directly. This is due
to the fact... | [
{
"created": "Thu, 30 Jul 2015 19:55:44 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jul 2015 20:22:10 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Nov 2015 03:42:05 GMT",
"version": "v3"
}
] | 2015-11-11 | [
[
"Morales-Técotl",
"Hugo A.",
""
],
[
"Orozco-Borunda",
"Daniel H.",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | The saddle point approximation of the path integral partition functions is an important way of deriving the thermodynamical properties of black holes. However, there are certain black hole models and some mathematically analog mechanical models for which this method cannot be applied directly. This is due to the fact t... |
1606.02417 | Richard Woodard | S. Basu and R. P. Woodard | Testing an Ansatz for the Leading Secular Loop Corrections from Quantum
Gravity during Inflation | 24 pages, 2 figures, uses LaTeX2e, version 2 corrects some typos and
adds some references | Class. Quant. Grav. 33 (2016) no. 20, 205007 | 10.1088/0264-9381/33/20/205007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is widely believed that the leading secular loop corrections from quantum
gravity can be subsumed into a coordinate redefinition. Hence the apparent
infrared logarithm corrections to any quantity would be just the result of
taking the expectation value of the tree order quantity at the transformed
coordinates in t... | [
{
"created": "Wed, 8 Jun 2016 06:37:53 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2016 16:35:00 GMT",
"version": "v2"
}
] | 2016-10-03 | [
[
"Basu",
"S.",
""
],
[
"Woodard",
"R. P.",
""
]
] | It is widely believed that the leading secular loop corrections from quantum gravity can be subsumed into a coordinate redefinition. Hence the apparent infrared logarithm corrections to any quantity would be just the result of taking the expectation value of the tree order quantity at the transformed coordinates in the... |
2103.10405 | Yannick Herfray | Yannick Herfray | Tractor geometry of asymptotically flat spacetimes | This match the version published in Annales Henri Poincar\'e (2022) | null | 10.1007/s00023-022-01174-0 | null | gr-qc math-ph math.DG math.MP | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In a recent work it was shown that conformal Carroll geometries are
canonically equipped with a null-tractor bundle generalizing the tractor bundle
of conformal geometry. We here show that in the case of the conformal boundary
of an asymptotically flat spacetime of any dimension d>=3, this null-tractor
bundle over nu... | [
{
"created": "Thu, 18 Mar 2021 17:40:54 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Mar 2021 16:21:05 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Nov 2021 17:35:52 GMT",
"version": "v3"
},
{
"created": "Sat, 11 Jun 2022 12:26:36 GMT",
"version": "v4"
}
] | 2022-06-14 | [
[
"Herfray",
"Yannick",
""
]
] | In a recent work it was shown that conformal Carroll geometries are canonically equipped with a null-tractor bundle generalizing the tractor bundle of conformal geometry. We here show that in the case of the conformal boundary of an asymptotically flat spacetime of any dimension d>=3, this null-tractor bundle over null... |
2310.19183 | Andres Vargas-Sanchez Mr | Andr\'es F. Vargas and Andrew Melatos | Search for gravitational waves from Scorpius X-1 with a hidden Markov
model in O3 LIGO data with a corrected orbital ephemeris | 8 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results are presented for a semi-coherent search for gravitational waves from
the low-mass X-ray binary Scorpius X-1 in Observing Run 3 (O3) data from the
Laser Interferometer Gravitational Wave Observatory, using an updated orbital
parameter ephemeris and a hidden Markov model (HMM) to allow for spin
wandering. The ... | [
{
"created": "Sun, 29 Oct 2023 22:56:07 GMT",
"version": "v1"
}
] | 2023-10-31 | [
[
"Vargas",
"Andrés F.",
""
],
[
"Melatos",
"Andrew",
""
]
] | Results are presented for a semi-coherent search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in Observing Run 3 (O3) data from the Laser Interferometer Gravitational Wave Observatory, using an updated orbital parameter ephemeris and a hidden Markov model (HMM) to allow for spin wandering. The ne... |
2010.01720 | Haret Rosu | H.C. Rosu, S.C. Mancas, C.-C. Hsieh | Superfluid Rayleigh-Plesset extension of FLRW cosmology | 13 pages, 11 figures with subfigures, new section with 2 figures and
new subsection added, published version | Annals of Physics 429 (2021) 168490 | 10.1016/j.aop.2021.168490 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Guided by the analogy with the Rayleigh-Plesset dynamics of multielectron
bubbles in superfluid He-4, we consider the cosmological FLRW evolution
equation with additional cubic and sixth powers of the inverse of the scale
factor of the universe. For the barotropic parameter w=2/3 (coasting universe),
along with zero ... | [
{
"created": "Sun, 4 Oct 2020 23:47:12 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Oct 2020 22:23:26 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Jan 2021 03:53:29 GMT",
"version": "v3"
},
{
"created": "Tue, 18 May 2021 18:53:16 GMT",
"version": "v4"
}
] | 2021-05-20 | [
[
"Rosu",
"H. C.",
""
],
[
"Mancas",
"S. C.",
""
],
[
"Hsieh",
"C. -C.",
""
]
] | Guided by the analogy with the Rayleigh-Plesset dynamics of multielectron bubbles in superfluid He-4, we consider the cosmological FLRW evolution equation with additional cubic and sixth powers of the inverse of the scale factor of the universe. For the barotropic parameter w=2/3 (coasting universe), along with zero co... |
1609.02747 | Maciej Dunajski | Maciej Dunajski, Paul Tod | Non-diagonal four-dimensional cohomogeneity-one Einstein metrics in
various signatures | null | null | null | DAMTP-2016-67 | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most known four-dimensional cohomogeneity-one Einstein metrics are diagonal
in the basis defined by the left-invariant one-forms, though some essentially
non-diagonal ones are known. We consider the problem of explicitly seeking
non-diagonal Einstein metrics, and we find solutions which in some cases
exhaust the poss... | [
{
"created": "Fri, 9 Sep 2016 11:20:13 GMT",
"version": "v1"
}
] | 2016-09-15 | [
[
"Dunajski",
"Maciej",
""
],
[
"Tod",
"Paul",
""
]
] | Most known four-dimensional cohomogeneity-one Einstein metrics are diagonal in the basis defined by the left-invariant one-forms, though some essentially non-diagonal ones are known. We consider the problem of explicitly seeking non-diagonal Einstein metrics, and we find solutions which in some cases exhaust the possib... |
1907.07135 | Dinesh Chandra Maurya | Dinesh Chandra Maurya, Rashid Zia | Brans-Dicke Scalar Field Cosmological Model in Lyra's Geometry | 20 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1406.7636, arXiv:1710.09269, arXiv:1710.07281, arXiv:1203.0917 by other
authors | Phys. Rev. D, 100, 023503 (2019) | 10.1103/PhysRevD.100.023503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have developed a new cosmological model in Einstein's
modified gravity theory using two types of modification.(i) Geometrical
modification, in which we have used Lyra's geometry in the left hand side of
the Einstein field equations (EFE) and (ii) Modification in gravity (energy
momentum tensor) on r... | [
{
"created": "Sun, 14 Jul 2019 17:07:27 GMT",
"version": "v1"
}
] | 2019-07-17 | [
[
"Maurya",
"Dinesh Chandra",
""
],
[
"Zia",
"Rashid",
""
]
] | In this paper, we have developed a new cosmological model in Einstein's modified gravity theory using two types of modification.(i) Geometrical modification, in which we have used Lyra's geometry in the left hand side of the Einstein field equations (EFE) and (ii) Modification in gravity (energy momentum tensor) on rig... |
2103.02389 | Mariem Magdy Ali Mohamed | Mariem M. Ali Mohamed, Juan A. Valiente Kroon | A comparison of Ashtekar's and Friedrich's formalisms of spatial
infinity | 33 pages, 4 figures | null | 10.1088/1361-6382/ac1208 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Penrose's idea of asymptotic flatness provides a framework for understanding
the asymptotic structure of gravitational fields of isolated systems at null
infinity. However, the studies of the asymptotic behaviour of fields near
spatial infinity are more challenging due to the singular nature of spatial
infinity in a ... | [
{
"created": "Wed, 3 Mar 2021 13:28:39 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2021 15:53:43 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Aug 2023 10:50:26 GMT",
"version": "v3"
}
] | 2023-08-22 | [
[
"Mohamed",
"Mariem M. Ali",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | Penrose's idea of asymptotic flatness provides a framework for understanding the asymptotic structure of gravitational fields of isolated systems at null infinity. However, the studies of the asymptotic behaviour of fields near spatial infinity are more challenging due to the singular nature of spatial infinity in a re... |
gr-qc/0008050 | Christodoulakis Theodosios | T. Christodoulakis, G. Kofinas, E. Korfiatis, G.O. Papadopoulos and A.
Paschos | Time-Dependent Automorphism Inducing Diffeomorphisms In Vacuum Bianchi
Cosmologies And The Complete Closed Form Solutions For Type II & V | 60 pages, Typeset using Latex2e, no figures, 1 table | J.Math.Phys.42:3580-3608,2001 | 10.1063/1.1386637 | null | gr-qc math-ph math.DG math.MP | null | We investigate the set of spacetime general coordinate transformations
(G.C.T.) which leave the line element of a generic Bianchi Type Geometry,
quasi-form invariant; i.e. preserve manifest spatial Homogeneity. We find that
these G.C.T.'s, induce special time-dependent automorphic changes, on the
spatial scale factor... | [
{
"created": "Mon, 21 Aug 2000 10:53:08 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Aug 2000 07:59:12 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Mar 2001 14:45:10 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Mar 2001 12:05:30 GMT",
"version": "v4"
},
{
"cre... | 2009-10-09 | [
[
"Christodoulakis",
"T.",
""
],
[
"Kofinas",
"G.",
""
],
[
"Korfiatis",
"E.",
""
],
[
"Papadopoulos",
"G. O.",
""
],
[
"Paschos",
"A.",
""
]
] | We investigate the set of spacetime general coordinate transformations (G.C.T.) which leave the line element of a generic Bianchi Type Geometry, quasi-form invariant; i.e. preserve manifest spatial Homogeneity. We find that these G.C.T.'s, induce special time-dependent automorphic changes, on the spatial scale factor m... |
2010.09064 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | Massive particles in the Einstein-Lovelock-anti-de Sitter black hole
spacetime | 6 pages (revtex), 1 figure | Class. Quantum Grav. 38: 045015 (2021) | 10.1088/1361-6382/abd302 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An interpretation to the physics of stable geodesics of massive particles in
black hole backgrounds has been recently proposed in the context of the AdS/CFT
correspondence. It was argued that the existence of stable orbits indicates
that the dual state does not thermalize on a thermal time scale and the bulk
excitati... | [
{
"created": "Sun, 18 Oct 2020 18:51:37 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Dec 2020 22:47:13 GMT",
"version": "v2"
}
] | 2020-12-29 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | An interpretation to the physics of stable geodesics of massive particles in black hole backgrounds has been recently proposed in the context of the AdS/CFT correspondence. It was argued that the existence of stable orbits indicates that the dual state does not thermalize on a thermal time scale and the bulk excitation... |
gr-qc/0111053 | Pankaj S. Joshi | S. S. Deshingkar, P. S. Joshi and I. H. Dwivedi | Appearance of the central singularity in spherical collapse | 25 pages, 6 figures | Phys.Rev. D65 (2002) 084009 | 10.1103/PhysRevD.65.084009 | null | gr-qc | null | We analyze here the structure of non-radial nonspacelike geodesics
terminating in the past at a naked singularity formed as the end state of
inhomogeneous dust collapse. The spectrum of outgoing nonspacelike null
geodesics is examined analytically. The local and global visibility of the
singularity is also examined b... | [
{
"created": "Fri, 16 Nov 2001 17:36:37 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Deshingkar",
"S. S.",
""
],
[
"Joshi",
"P. S.",
""
],
[
"Dwivedi",
"I. H.",
""
]
] | We analyze here the structure of non-radial nonspacelike geodesics terminating in the past at a naked singularity formed as the end state of inhomogeneous dust collapse. The spectrum of outgoing nonspacelike null geodesics is examined analytically. The local and global visibility of the singularity is also examined by ... |
gr-qc/0406086 | Valery Kiselev | V.V.Kiselev | Ghost condensate model of flat rotation curves | 4 pages, RevTeX4 file, references and clarifying footnotes added | null | null | null | gr-qc astro-ph hep-ph | null | An effective action of ghost condensate with higher derivatives creates a
source of gravity and mimics a dark matter in spiral galaxies. We present a
spherically symmetric static solution of Einstein--Hilbert equations with the
ghost condensate at large distances, where flat rotation curves are reproduced
in leading ... | [
{
"created": "Tue, 22 Jun 2004 07:11:29 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2004 12:16:31 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kiselev",
"V. V.",
""
]
] | An effective action of ghost condensate with higher derivatives creates a source of gravity and mimics a dark matter in spiral galaxies. We present a spherically symmetric static solution of Einstein--Hilbert equations with the ghost condensate at large distances, where flat rotation curves are reproduced in leading or... |
gr-qc/0506140 | Albert V. Minkevich | A. V. Minkevich | Gauge Approach to Gravitation and Regular Big Bang Theory | 11 pages, 8 figures. Some misprints are corrected, minor addition is
made | Grav.Cosmol. 12 (2006) 11-20 | null | null | gr-qc | null | Field theoretical scheme of regular Big Bang in 4-dimensional physical
space-time, built in the framework of gauge approach to gravitation, is
discussed. Regular bouncing character of homogeneous isotropic cosmological
models is ensured by gravitational repulsion effect at extreme conditions
without quantum gravitati... | [
{
"created": "Thu, 30 Jun 2005 07:44:55 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2005 08:56:19 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Minkevich",
"A. V.",
""
]
] | Field theoretical scheme of regular Big Bang in 4-dimensional physical space-time, built in the framework of gauge approach to gravitation, is discussed. Regular bouncing character of homogeneous isotropic cosmological models is ensured by gravitational repulsion effect at extreme conditions without quantum gravitation... |
0710.5542 | Carlos O. Lousto | Carlos O. Lousto and Hiroyuki Nakano (RIT) | Three-body equations of motion in successive post-Newtonian
approximations | 8 pages, 9 figures | Class.Quant.Grav.25:195019,2008 | 10.1088/0264-9381/25/19/195019 | null | gr-qc astro-ph | null | There are periodic solutions to the equal-mass three-body (and N-body)
problem in Newtonian gravity. The figure-eight solution is one of them. In this
paper, we discuss its solution in the first and second post-Newtonian
approximations to General Relativity. To do so we derive the canonical
equations of motion in the... | [
{
"created": "Mon, 29 Oct 2007 21:51:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lousto",
"Carlos O.",
"",
"RIT"
],
[
"Nakano",
"Hiroyuki",
"",
"RIT"
]
] | There are periodic solutions to the equal-mass three-body (and N-body) problem in Newtonian gravity. The figure-eight solution is one of them. In this paper, we discuss its solution in the first and second post-Newtonian approximations to General Relativity. To do so we derive the canonical equations of motion in the A... |
1812.10996 | Pietro Don\`a | Eugenio Bianchi, Pietro Dona, Ilya Vilensky | Entanglement entropy of Bell-network states in LQG: Analytical and
numerical results | 26 pages, 5 figures. The code is available at the link
https://bitbucket.org/pietrodona/bellnetworkentropy. Updated to match the
published version | Phys. Rev. D 99, 086013 (2019) | 10.1103/PhysRevD.99.086013 | IGC-18/12-1 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bell-network states are loop-quantum-gravity states that glue quantum
polyhedra with entanglement. We present an algorithm and a code that evaluates
the reduced density matrix of a Bell-network state and computes its
entanglement entropy. In particular, we use our code for simple graphs to study
properties of Bell-ne... | [
{
"created": "Fri, 28 Dec 2018 14:04:41 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2019 18:51:34 GMT",
"version": "v2"
}
] | 2019-04-24 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Dona",
"Pietro",
""
],
[
"Vilensky",
"Ilya",
""
]
] | Bell-network states are loop-quantum-gravity states that glue quantum polyhedra with entanglement. We present an algorithm and a code that evaluates the reduced density matrix of a Bell-network state and computes its entanglement entropy. In particular, we use our code for simple graphs to study properties of Bell-netw... |
2003.02281 | Matthew Mould | Matthew Mould, Davide Gerosa | Endpoint of the up-down instability in precessing binary black holes | Animated versions of Figs. 2, 7 and 13 are available at
https://davidegerosa.com/spinprecession | Phys. Rev. D 101, 124037 (2020) | 10.1103/PhysRevD.101.124037 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary black holes in which both spins are aligned with the binary's orbital
angular momentum do not precess. However, the up-down configuration, in which
the spin of the heavier (lighter) black hole is aligned (anti-aligned) with the
orbital angular momentum, is unstable to spin precession at small orbital
separatio... | [
{
"created": "Wed, 4 Mar 2020 19:00:06 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jun 2020 10:48:28 GMT",
"version": "v2"
}
] | 2020-06-22 | [
[
"Mould",
"Matthew",
""
],
[
"Gerosa",
"Davide",
""
]
] | Binary black holes in which both spins are aligned with the binary's orbital angular momentum do not precess. However, the up-down configuration, in which the spin of the heavier (lighter) black hole is aligned (anti-aligned) with the orbital angular momentum, is unstable to spin precession at small orbital separations... |
2106.00558 | Samuele Marco Silveravalle | Alfio Bonanno and Samuele Silveravalle | The gravitational field of a star in quadratic gravity | 18 pages, 7 figures, 1 table | JCAP 08 (2021) 050 | 10.1088/1475-7516/2021/08/050 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The characterization of the gravitational field of isolated objects is still
an open question in quadratic theories of gravity. We study static equilibrium
solutions for a self-gravitating fluid in extensions of General Relativity
including terms quadratic in the Weyl tensor $C_{\mu\nu\rho\sigma}$ and in the
Ricci sc... | [
{
"created": "Tue, 1 Jun 2021 15:18:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2021 12:29:40 GMT",
"version": "v2"
}
] | 2021-08-26 | [
[
"Bonanno",
"Alfio",
""
],
[
"Silveravalle",
"Samuele",
""
]
] | The characterization of the gravitational field of isolated objects is still an open question in quadratic theories of gravity. We study static equilibrium solutions for a self-gravitating fluid in extensions of General Relativity including terms quadratic in the Weyl tensor $C_{\mu\nu\rho\sigma}$ and in the Ricci scal... |
2307.12541 | Carla Cederbaum | Carla Cederbaum and Melanie Graf | Coordinates are messy -- not only in General Relativity | This article will appear in Gravity, Cosmology, and Astrophysics -- A
Journey of Exploration and Discovery with Female Pioneers (editors Betti
Hartmann, Jutta Kunz), Springer 2023,
https://link.springer.com/book/9783031420979 | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The coordinate freedom of General Relativity makes it challenging to find
mathematically rigorous and physically sound definitions for physical
quantities such as the center of mass of an isolated gravitating system. We
will argue that a similar phenomenon occurs in Newtonian Gravity once one
ahistorically drops the ... | [
{
"created": "Mon, 24 Jul 2023 06:09:27 GMT",
"version": "v1"
}
] | 2023-07-25 | [
[
"Cederbaum",
"Carla",
""
],
[
"Graf",
"Melanie",
""
]
] | The coordinate freedom of General Relativity makes it challenging to find mathematically rigorous and physically sound definitions for physical quantities such as the center of mass of an isolated gravitating system. We will argue that a similar phenomenon occurs in Newtonian Gravity once one ahistorically drops the re... |
1801.08473 | Maur\'icio Richartz | Sam Patrick, Antonin Coutant, Mauricio Richartz, Silke Weinfurtner | Black hole quasibound states from a draining bathtub vortex flow | Published as Editors' Suggestion in Physical Review Letters. v2: 10
pages, 4 figures, 1 table | Phys. Rev. Lett. 121, 061101 (2018) | 10.1103/PhysRevLett.121.061101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes are a set of damped resonances that describe how an excited
open system is driven back to equilibrium. In gravitational physics these modes
characterise the ringdown of a perturbed black hole, e.g. following a binary
black hole merger. A careful analysis of the ringdown spectrum reveals the
properti... | [
{
"created": "Thu, 25 Jan 2018 16:25:55 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Aug 2018 19:12:05 GMT",
"version": "v2"
}
] | 2018-08-09 | [
[
"Patrick",
"Sam",
""
],
[
"Coutant",
"Antonin",
""
],
[
"Richartz",
"Mauricio",
""
],
[
"Weinfurtner",
"Silke",
""
]
] | Quasinormal modes are a set of damped resonances that describe how an excited open system is driven back to equilibrium. In gravitational physics these modes characterise the ringdown of a perturbed black hole, e.g. following a binary black hole merger. A careful analysis of the ringdown spectrum reveals the properties... |
1204.4593 | Nicola Tamanini | Nicola Tamanini and Christian G. Boehmer | Good and bad tetrads in f(T) gravity | 25 pages | Physical Review D86 (2012) 044009 | 10.1103/PhysRevD.86.044009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the importance of choosing good tetrads for the study of the
field equations of $f(T)$ gravity. It is well known that this theory is not
invariant under local Lorentz transformations, and therefore the choice of
tetrad plays a crucial role in such models. Different tetrads will lead to
different field ... | [
{
"created": "Fri, 20 Apr 2012 11:59:38 GMT",
"version": "v1"
}
] | 2012-11-13 | [
[
"Tamanini",
"Nicola",
""
],
[
"Boehmer",
"Christian G.",
""
]
] | We investigate the importance of choosing good tetrads for the study of the field equations of $f(T)$ gravity. It is well known that this theory is not invariant under local Lorentz transformations, and therefore the choice of tetrad plays a crucial role in such models. Different tetrads will lead to different field eq... |
2207.01467 | Benrong Mu | Siyuan Hui, Benrong Mu and Jun Tao | Joule-Thomson expansion of the lower-dimensional black hole in rainbow
gravity | 14 pages, 7 figures, 2 tables | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we extend Joule-Thomson expansion to the low-dimensional
regime in rainbow gravity by considering the rainbow rotating BTZ metric in the
(2+1)-dimensional spacetime. After the metric of the black hole is obtained, we
get the Joule-Thomson expansion of the black hole, including the Joule-Thomson
coeffic... | [
{
"created": "Mon, 4 Jul 2022 14:55:18 GMT",
"version": "v1"
}
] | 2022-07-05 | [
[
"Hui",
"Siyuan",
""
],
[
"Mu",
"Benrong",
""
],
[
"Tao",
"Jun",
""
]
] | In this paper, we extend Joule-Thomson expansion to the low-dimensional regime in rainbow gravity by considering the rainbow rotating BTZ metric in the (2+1)-dimensional spacetime. After the metric of the black hole is obtained, we get the Joule-Thomson expansion of the black hole, including the Joule-Thomson coefficie... |
2208.13956 | Abdallah Al Zahrani M. | A. M. Al Zahrani | Circular orbits of Charged Particles around a Weakly Charged and
Magnetized Schwarzschild Black Hole | null | null | 10.1103/PhysRevD.103.084008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the circular orbits of charged particles around a weakly charged
Schwarzschild black hole immersed in a weak, axisymmetric magnetic field. We
start by reviewing the circular orbits of neutral particles and charged
particles around only weakly charged and only weakly magnetized black holes.
The case of a weak... | [
{
"created": "Tue, 30 Aug 2022 02:12:34 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Zahrani",
"A. M. Al",
""
]
] | We study the circular orbits of charged particles around a weakly charged Schwarzschild black hole immersed in a weak, axisymmetric magnetic field. We start by reviewing the circular orbits of neutral particles and charged particles around only weakly charged and only weakly magnetized black holes. The case of a weakly... |
0707.0635 | E. Canessa | E. Canessa | Possible Connection between Probability, Spacetime Geometry and Quantum
Mechanics | in press | PhysicaA385:185-190,2007 | 10.1016/j.physa.2007.06.006 | null | gr-qc cond-mat.other quant-ph | null | Following our discussion [Physica A, 375 (2007) 123] to associate an
analogous probabilistic description with spacetime geometry in the
Schwarzschild metric from the macro- to the micro-domain, we argue that there
is a possible connection among normalized probabilities, spacetime geometry (in
the form of Schwarzschil... | [
{
"created": "Wed, 4 Jul 2007 15:26:17 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Canessa",
"E.",
""
]
] | Following our discussion [Physica A, 375 (2007) 123] to associate an analogous probabilistic description with spacetime geometry in the Schwarzschild metric from the macro- to the micro-domain, we argue that there is a possible connection among normalized probabilities, spacetime geometry (in the form of Schwarzschild ... |
1801.03208 | Emanuele Berti | Emanuele Berti, Kent Yagi, Nicol\'as Yunes | Extreme Gravity Tests with Gravitational Waves from Compact Binary
Coalescences: (I) Inspiral-Merger | 46 pages, 4 figures, 4 tables. Review paper to appear in the General
Relativity and Gravitation (GRG) Topical Collection "Testing the Kerr
spacetime with gravitational-wave and electromagnetic observations" (Guest
Editor: Emanuele Berti). Added two figures and some references. Matches
version published in GRG a... | null | 10.1007/s10714-018-2362-8 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of the inspiral and merger of compact binaries by the
LIGO/Virgo collaboration ushered in a new era in the study of strong-field
gravity. We review current and future tests of strong gravity and of the Kerr
paradigm with gravitational-wave interferometers, both within a theory-agnostic
framework (the ... | [
{
"created": "Wed, 10 Jan 2018 01:23:14 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Apr 2018 21:09:49 GMT",
"version": "v2"
}
] | 2018-04-06 | [
[
"Berti",
"Emanuele",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolás",
""
]
] | The observation of the inspiral and merger of compact binaries by the LIGO/Virgo collaboration ushered in a new era in the study of strong-field gravity. We review current and future tests of strong gravity and of the Kerr paradigm with gravitational-wave interferometers, both within a theory-agnostic framework (the pa... |
gr-qc/0609072 | Michael Edmund Tobar | Paul L. Stanwix, Michael E. Tobar, Peter Wolf, Clayton R. Locke,
Eugene N. Ivanov | Improved test of Lorentz Invariance in Electrodynamics using Rotating
Cryogenic Sapphire Oscillators | Accepted for publication in Phys. Rev. D | Phys.Rev.D74:081101,2006 | 10.1103/PhysRevD.74.081101 | null | gr-qc astro-ph hep-ph physics.ins-det | null | We present new results from our test of Lorentz invariance, which compares
two orthogonal cryogenic sapphire microwave oscillators rotating in the lab. We
have now acquired over 1 year of data, allowing us to avoid the short data set
approximation (less than 1 year) that assumes no cancelation occurs between the
$\ti... | [
{
"created": "Tue, 19 Sep 2006 16:15:46 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2006 05:42:25 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Stanwix",
"Paul L.",
""
],
[
"Tobar",
"Michael E.",
""
],
[
"Wolf",
"Peter",
""
],
[
"Locke",
"Clayton R.",
""
],
[
"Ivanov",
"Eugene N.",
""
]
] | We present new results from our test of Lorentz invariance, which compares two orthogonal cryogenic sapphire microwave oscillators rotating in the lab. We have now acquired over 1 year of data, allowing us to avoid the short data set approximation (less than 1 year) that assumes no cancelation occurs between the $\tild... |
0811.1573 | Guglielmo Fucci | Ivan G. Avramidi and Guglielmo Fucci | A Model for the Pioneer Anomaly | LaTeX, 12 pages | Can. J. Phys. 87: 1089-1093 (2009) | 10.1139/P09-076 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous work we showed that massive test particles exhibit a
non-geodesic acceleration in a modified theory of gravity obtained by a
non-commutative deformation of General Relativity (so-called Matrix Gravity).
We propose that this non-geodesic acceleration might be the origin of the
anomalous acceleration expe... | [
{
"created": "Mon, 10 Nov 2008 20:56:57 GMT",
"version": "v1"
}
] | 2009-12-10 | [
[
"Avramidi",
"Ivan G.",
""
],
[
"Fucci",
"Guglielmo",
""
]
] | In a previous work we showed that massive test particles exhibit a non-geodesic acceleration in a modified theory of gravity obtained by a non-commutative deformation of General Relativity (so-called Matrix Gravity). We propose that this non-geodesic acceleration might be the origin of the anomalous acceleration experi... |
2208.02768 | Konstantin Eder | Konstantin Eder, Hanno Sahlmann | Chiral loop quantum supergravity and black hole entropy | 7 pages. arXiv admin note: substantial text overlap with
arXiv:2204.01661 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work has shown that local supersymmetry on a spacetime boundary in
$\mathcal{N}$-extended AdS supergravity in chiral variables implies coupling to
a boundary $\mathrm{OSp}(\mathcal{N}|2)_{\mathbb{C}}$ super Chern-Simons
theory. We propose a way to calculate the entropy $S$ for the boundary, in the
supersymmetr... | [
{
"created": "Thu, 4 Aug 2022 16:58:30 GMT",
"version": "v1"
}
] | 2022-08-05 | [
[
"Eder",
"Konstantin",
""
],
[
"Sahlmann",
"Hanno",
""
]
] | Recent work has shown that local supersymmetry on a spacetime boundary in $\mathcal{N}$-extended AdS supergravity in chiral variables implies coupling to a boundary $\mathrm{OSp}(\mathcal{N}|2)_{\mathbb{C}}$ super Chern-Simons theory. We propose a way to calculate the entropy $S$ for the boundary, in the supersymmetric... |
1907.07622 | Matthew Fox | Matthew S. Fox | Multipole Hair of Schwarzschild-Tangherlini Black Holes | 11 pages; v2/v3: small revisions; accepted to JMP | J. Math. Phys. 60, 102502 (2019) | 10.1063/1.5124502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the field of an electric point charge that is slowly lowered into an
$n + 1$ dimensional Schwarzschild-Tangherlini black hole. We find that if $n >
3$, then countably infinite nonzero multipole moments manifest to observers
outside the event horizon as the charge falls in. This suggests the final state
of th... | [
{
"created": "Wed, 17 Jul 2019 16:24:52 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2019 16:49:11 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Sep 2019 03:01:49 GMT",
"version": "v3"
}
] | 2020-03-30 | [
[
"Fox",
"Matthew S.",
""
]
] | We study the field of an electric point charge that is slowly lowered into an $n + 1$ dimensional Schwarzschild-Tangherlini black hole. We find that if $n > 3$, then countably infinite nonzero multipole moments manifest to observers outside the event horizon as the charge falls in. This suggests the final state of the ... |
1907.09473 | J. Brian Pitts | J. Brian Pitts | What Are Observables in Hamiltonian Einstein-Maxwell Theory? | Forthcoming in _Foundations of Physics_ | Foundations of Physics 49 (2019) pp. 786-796 | 10.1007/s10701-019-00284-w | null | gr-qc hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Is change missing in Hamiltonian Einstein-Maxwell theory? Given the most
common definition of observables (having weakly vanishing Poisson bracket with
each first-class constraint), observables are constants of the motion and
nonlocal. Unfortunately this definition also implies that the observables for
massive electr... | [
{
"created": "Mon, 22 Jul 2019 09:45:51 GMT",
"version": "v1"
}
] | 2019-09-16 | [
[
"Pitts",
"J. Brian",
""
]
] | Is change missing in Hamiltonian Einstein-Maxwell theory? Given the most common definition of observables (having weakly vanishing Poisson bracket with each first-class constraint), observables are constants of the motion and nonlocal. Unfortunately this definition also implies that the observables for massive electrom... |
2204.10299 | Alessandro Nagar | Seth Hopper, Alessandro Nagar, and Piero Rettegno | Strong-field scattering of two spinning black holes: Numerics versus
Analytics | 9 pages, 4 figures. Submitted to Phys. Rev. D | null | 10.1103/PhysRevD.107.124034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new Numerical Relativity calculations of the scattering angle
$\chi$ between two, equal-mass, black holes on hyperbolic-like orbits. We build
upon previous work considering, for the first time, spinning black holes, with
equal spins either aligned or antialigned with the orbital angular momentum. We
detail... | [
{
"created": "Thu, 21 Apr 2022 17:33:34 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Apr 2022 11:13:47 GMT",
"version": "v2"
}
] | 2023-06-28 | [
[
"Hopper",
"Seth",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Rettegno",
"Piero",
""
]
] | We present new Numerical Relativity calculations of the scattering angle $\chi$ between two, equal-mass, black holes on hyperbolic-like orbits. We build upon previous work considering, for the first time, spinning black holes, with equal spins either aligned or antialigned with the orbital angular momentum. We detail t... |
gr-qc/0404005 | Martin Tajmar | M. Tajmar, K. Hense, K. Marhold, C.J. de Matos | Weight Measurements of High-Temperature Superconductors during Phase
Transition in Stationary, Non-Stationary Condition and under ELF Radiation | Version as appeared in the STAIF conference proceedings. Received
Best Paper Award | Edited by El-Genk, M.S., "Proceedings of the Space Technology and
Applications International Forum (STAIF-2005)", AIP Conference Proceedings
746, Issue 1, American Institute of Physics, New York, 2005, pp. 1290-1297 | 10.1063/1.1867257 | null | gr-qc | null | There have been a number of claims in the literature about gravity shielding
effects of superconductors and more recently on the weight reduction of
superconductors passing through their critical temperature. We report several
experiments to test the weight of superconductors under various conditions.
First, we repor... | [
{
"created": "Thu, 1 Apr 2004 10:26:36 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2004 07:54:00 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jul 2006 22:51:55 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Tajmar",
"M.",
""
],
[
"Hense",
"K.",
""
],
[
"Marhold",
"K.",
""
],
[
"de Matos",
"C. J.",
""
]
] | There have been a number of claims in the literature about gravity shielding effects of superconductors and more recently on the weight reduction of superconductors passing through their critical temperature. We report several experiments to test the weight of superconductors under various conditions. First, we report ... |
2312.16866 | Allah Ditta | G. Mustafa, Allah Ditta, Saadia Mumtaz, S.K. Maurya, De\u{g}er
Sofuo\u{g}lu | Study on physical properties and maximum mass limit of Finch-Skea
anisotropic model under Karmarkar condition in $f(Q)$-gravity | 16 pages, 9 figures, 5 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The primary objective of this work is to study the dynamical characteristics
of an anisotropic compact star model with spherical symmetry. This
investigation is conducted in the framework of $f(Q)$ modified gravity. To
simplify the calculations, we employ the Karmarkar condition and derive a
differential equation tha... | [
{
"created": "Thu, 28 Dec 2023 07:26:58 GMT",
"version": "v1"
}
] | 2023-12-29 | [
[
"Mustafa",
"G.",
""
],
[
"Ditta",
"Allah",
""
],
[
"Mumtaz",
"Saadia",
""
],
[
"Maurya",
"S. K.",
""
],
[
"Sofuoğlu",
"Değer",
""
]
] | The primary objective of this work is to study the dynamical characteristics of an anisotropic compact star model with spherical symmetry. This investigation is conducted in the framework of $f(Q)$ modified gravity. To simplify the calculations, we employ the Karmarkar condition and derive a differential equation that ... |
2308.15776 | Orlando Luongo | Peter K. S. Dunsby, Orlando Luongo, Marco Muccino | Unifying the dark sector through a single matter fluid with non-zero
pressure | 15 pages, 3 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore a generalised unified dark energy model that incorporates a
non-minimal interaction between a tachyonic fluid and an additional scalar
field. Specifically, we require that the second field possesses a vacuum
energy, introducing an ineliminable offset due to a symmetry-breaking
mechanism. After the transiti... | [
{
"created": "Wed, 30 Aug 2023 06:07:45 GMT",
"version": "v1"
}
] | 2023-08-31 | [
[
"Dunsby",
"Peter K. S.",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Muccino",
"Marco",
""
]
] | We explore a generalised unified dark energy model that incorporates a non-minimal interaction between a tachyonic fluid and an additional scalar field. Specifically, we require that the second field possesses a vacuum energy, introducing an ineliminable offset due to a symmetry-breaking mechanism. After the transition... |
1103.0543 | Abraham Harte | Abraham I. Harte | Mechanics of extended masses in general relativity | 39 pages, 2 figures; fixed equation satisfied by the Green function
used to construct the effective metric | Class. Quantum Grav. 29, 055012 (2012) | 10.1088/0264-9381/29/5/055012 | AEI-2011-010 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The "external" or "bulk" motion of extended bodies is studied in general
relativity. Compact material objects of essentially arbitrary shape, spin,
internal composition, and velocity are allowed as long as there is no direct
(non-gravitational) contact with other sources of stress-energy. Physically
reasonable linear... | [
{
"created": "Wed, 2 Mar 2011 20:58:05 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Mar 2011 17:19:04 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Sep 2011 15:51:59 GMT",
"version": "v3"
},
{
"created": "Wed, 6 Jun 2012 13:54:05 GMT",
"version": "v4"
}
] | 2012-06-07 | [
[
"Harte",
"Abraham I.",
""
]
] | The "external" or "bulk" motion of extended bodies is studied in general relativity. Compact material objects of essentially arbitrary shape, spin, internal composition, and velocity are allowed as long as there is no direct (non-gravitational) contact with other sources of stress-energy. Physically reasonable linear a... |
0902.1170 | John W. Barrett | John W. Barrett, R.J. Dowdall, Winston J. Fairbairn, Henrique Gomes,
Frank Hellmann | Asymptotic analysis of the EPRL four-simplex amplitude | v2: improved presentation, typos corrected, refs added; results
unchanged | J.Math.Phys.50:112504,2009 | 10.1063/1.3244218 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The semiclassical limit of a 4-simplex amplitude for a spin foam quantum
gravity model with an Immirzi parameter is studied. If the boundary state
represents a non-degenerate 4-simplex geometry, the asymptotic formula contains
the Regge action for general relativity. A canonical choice of phase for the
boundary state... | [
{
"created": "Fri, 6 Feb 2009 20:57:06 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2009 23:42:54 GMT",
"version": "v2"
}
] | 2010-01-15 | [
[
"Barrett",
"John W.",
""
],
[
"Dowdall",
"R. J.",
""
],
[
"Fairbairn",
"Winston J.",
""
],
[
"Gomes",
"Henrique",
""
],
[
"Hellmann",
"Frank",
""
]
] | The semiclassical limit of a 4-simplex amplitude for a spin foam quantum gravity model with an Immirzi parameter is studied. If the boundary state represents a non-degenerate 4-simplex geometry, the asymptotic formula contains the Regge action for general relativity. A canonical choice of phase for the boundary state i... |
1709.07275 | Baocheng Zhang | Baocheng Zhang | On the entropy associated with the interior of a black hole | null | Physics Letters B 773 (2017) 644-646 | 10.1016/j.physletb.2017.09.035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The investigation about the volume of a black hole is closely related to the
quantum nature of the black hole. The entropy is a significant concept for
this. A recent work by Majhi and Samanta [Phys. Lett. B 770 (2017) 314] after
us presented a similar conclusion that the entropy associated with the volume
is proport... | [
{
"created": "Thu, 21 Sep 2017 12:05:43 GMT",
"version": "v1"
}
] | 2017-09-22 | [
[
"Zhang",
"Baocheng",
""
]
] | The investigation about the volume of a black hole is closely related to the quantum nature of the black hole. The entropy is a significant concept for this. A recent work by Majhi and Samanta [Phys. Lett. B 770 (2017) 314] after us presented a similar conclusion that the entropy associated with the volume is proportio... |
2307.00044 | Nuno M. Santos | Pedro Ildefonso, Miguel Zilh\~ao, Carlos Herdeiro, Eugen Radu, Nuno M.
Santos | Self-interacting dipolar boson stars and their dynamics | 13 pages, 14 figures; movies of the numerical simulations reported
can be found in http://gravitation.web.ua.pt/index.php/node/4488 | null | 10.1103/PhysRevD.108.064011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and dynamically evolve dipolar, self-interacting scalar boson
stars in a model with sextic (+ quartic) self-interactions. The domain of
existence of such dipolar $Q$-stars has a similar structure to that of the
fundamental monopolar stars of the same model. For the latter it is structured
in a Newtonian ... | [
{
"created": "Fri, 30 Jun 2023 18:00:00 GMT",
"version": "v1"
}
] | 2023-09-26 | [
[
"Ildefonso",
"Pedro",
""
],
[
"Zilhão",
"Miguel",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Radu",
"Eugen",
""
],
[
"Santos",
"Nuno M.",
""
]
] | We construct and dynamically evolve dipolar, self-interacting scalar boson stars in a model with sextic (+ quartic) self-interactions. The domain of existence of such dipolar $Q$-stars has a similar structure to that of the fundamental monopolar stars of the same model. For the latter it is structured in a Newtonian pl... |
1405.1248 | Philip D. Mannheim | Luca Fabbri and Philip D. Mannheim | Continuity of the torsionless limit as a selection rule for gravity
theories with torsion | 6 pages, revtex4. Final version, to appear in Phys. Rev. D | Phys. Rev. D 90, 024042 (2014) | 10.1103/PhysRevD.90.024042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While one can in principle augment gravity theory with torsion, it is
generally thought that any such torsion affects would be too small to be of
consequence. Here we show that this cannot in general be the case. We show that
the limit of vanishing torsion is not necessarily a continuous one, with the
theory obtained... | [
{
"created": "Tue, 6 May 2014 12:42:19 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jun 2014 18:19:18 GMT",
"version": "v2"
}
] | 2014-07-23 | [
[
"Fabbri",
"Luca",
""
],
[
"Mannheim",
"Philip D.",
""
]
] | While one can in principle augment gravity theory with torsion, it is generally thought that any such torsion affects would be too small to be of consequence. Here we show that this cannot in general be the case. We show that the limit of vanishing torsion is not necessarily a continuous one, with the theory obtained i... |
1608.04811 | Sarp Akcay | Sarp Akcay, David Dempsey, Sam Dolan | Spin-orbit precession for eccentric black hole binaries at first order
in the mass ratio | Matches the published version in CQG | Classical and Quantum Gravity, Volume 34, Number 8, 084001, 2017 | 10.1088/1361-6382/aa61d6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spin-orbit ("geodetic") precession for a compact binary in
strong-field gravity. Specifically, we compute $\psi$, the ratio of the
accumulated spin-precession and orbital angles over one radial period, for a
spinning compact body of mass $m_1$ and spin $s_1$, with $s_1 \ll G m_1^2/c$,
orbiting a non-rotat... | [
{
"created": "Tue, 16 Aug 2016 23:47:34 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2016 14:06:30 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Mar 2017 15:50:35 GMT",
"version": "v3"
}
] | 2017-03-31 | [
[
"Akcay",
"Sarp",
""
],
[
"Dempsey",
"David",
""
],
[
"Dolan",
"Sam",
""
]
] | We consider spin-orbit ("geodetic") precession for a compact binary in strong-field gravity. Specifically, we compute $\psi$, the ratio of the accumulated spin-precession and orbital angles over one radial period, for a spinning compact body of mass $m_1$ and spin $s_1$, with $s_1 \ll G m_1^2/c$, orbiting a non-rotatin... |
0710.0722 | Francesco Cianfrani dr | F. Cianfrani, G. Montani | Boost symmetry in the Quantum Gravity sector | 8 pages, to appear in the proceedings of'' 4th Italian-Sino Workshop
on Relativistic Astrophysics'', AIP Conference Series | AIPConf.Proc.966:249-256,2008 | 10.1063/1.2837003 | null | gr-qc | null | We perform a canonical quantization of gravity in a second-order formulation,
taking as configuration variables those describing a 4-bein, not adapted to the
space-time splitting. We outline how, neither if we fix the Lorentz frame
before quantizing, nor if we perform no gauge fixing at all, is invariance
under boost... | [
{
"created": "Wed, 3 Oct 2007 07:48:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cianfrani",
"F.",
""
],
[
"Montani",
"G.",
""
]
] | We perform a canonical quantization of gravity in a second-order formulation, taking as configuration variables those describing a 4-bein, not adapted to the space-time splitting. We outline how, neither if we fix the Lorentz frame before quantizing, nor if we perform no gauge fixing at all, is invariance under boost t... |
2407.20285 | Martiros Khurshudyan | Emilio Elizalde, Martiros Khurshudyan, Sergei D. Odintsov | Can we learn from matter creation to solve the $H_{0}$ tension problem? | To appear in EPJC | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The $H_{0}$ tension problem is studied in the light of a matter creation
mechanism (an effective approach to replacing dark energy), the way to define
the matter creation rate being of pure phenomenological nature. Bayesian
(probabilistic) Machine Learning is used to learn the constraints on the free
parameters of th... | [
{
"created": "Fri, 26 Jul 2024 08:58:07 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Elizalde",
"Emilio",
""
],
[
"Khurshudyan",
"Martiros",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | The $H_{0}$ tension problem is studied in the light of a matter creation mechanism (an effective approach to replacing dark energy), the way to define the matter creation rate being of pure phenomenological nature. Bayesian (probabilistic) Machine Learning is used to learn the constraints on the free parameters of the ... |
2001.05999 | Camilo Posada | Jan Hlad\'ik, Camilo Posada, Zden\v{e}k Stuchl\'ik | Radial instability of trapping polytropic spheres | 20 pages, 18 figures. Accepted manuscript to appear in IJMPD | Int. J. Mod. Phys. D29, 2050030 (2020) | 10.1142/S0218271820500303 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We complete the stability study of general relativistic spherically symmetric
polytropic perfect fluid spheres, concentrating attention to the newly
discovered polytropes containing region of trapped null geodesics. We compare
the methods of treating the dynamical stability based on the equation governing
infinitesim... | [
{
"created": "Thu, 16 Jan 2020 18:59:40 GMT",
"version": "v1"
}
] | 2020-05-14 | [
[
"Hladík",
"Jan",
""
],
[
"Posada",
"Camilo",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | We complete the stability study of general relativistic spherically symmetric polytropic perfect fluid spheres, concentrating attention to the newly discovered polytropes containing region of trapped null geodesics. We compare the methods of treating the dynamical stability based on the equation governing infinitesimal... |
2403.12840 | Lei You | Lei You and Rui-bo Wang and Shi-Jie Ma and Jian-Bo Deng and Xian-Ru Hu | Optical properties of Euler-Heisenberg black hole in the Cold Dark
Matter Halo | 42 pages,16 figures,4 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The optical properties of Euler-Heisenberg (EH) black hole (BH) surrounded by
Cold Dark Matter (CDM) halo are investigated. By changing BH's parameters, we
found that the radius of horizon r_{h} and radius of photon sphere r_{ph} will
transparently increase as CDM halo parameters R and \rho increase. To show the
infl... | [
{
"created": "Tue, 19 Mar 2024 15:46:18 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"You",
"Lei",
""
],
[
"Wang",
"Rui-bo",
""
],
[
"Ma",
"Shi-Jie",
""
],
[
"Deng",
"Jian-Bo",
""
],
[
"Hu",
"Xian-Ru",
""
]
] | The optical properties of Euler-Heisenberg (EH) black hole (BH) surrounded by Cold Dark Matter (CDM) halo are investigated. By changing BH's parameters, we found that the radius of horizon r_{h} and radius of photon sphere r_{ph} will transparently increase as CDM halo parameters R and \rho increase. To show the influe... |
1704.06031 | Shin'ichi Hirano | Shin'ichi Hirano, Sakine Nishi, Tsutomu Kobayashi | Healthy imperfect dark matter from effective theory of mimetic
cosmological perturbations | 9 pages | null | 10.1088/1475-7516/2017/07/009 | RUP-17-6 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of a recently proposed model of scalar-field matter
called mimetic dark matter or imperfect dark matter. It has been known that
mimetic matter with higher derivative terms suffers from gradient instabilities
in scalar perturbations. To seek for an instability-free extension of imperfect
dark ma... | [
{
"created": "Thu, 20 Apr 2017 07:14:07 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2017 04:53:15 GMT",
"version": "v2"
}
] | 2017-07-19 | [
[
"Hirano",
"Shin'ichi",
""
],
[
"Nishi",
"Sakine",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | We study the stability of a recently proposed model of scalar-field matter called mimetic dark matter or imperfect dark matter. It has been known that mimetic matter with higher derivative terms suffers from gradient instabilities in scalar perturbations. To seek for an instability-free extension of imperfect dark matt... |
gr-qc/0402098 | Jerzy Matyjasek | Jerzy Matyjasek and Dariusz Tryniecki | Charged black holes in quadratic gravity | null | Phys.Rev. D69 (2004) 124016 | 10.1103/PhysRevD.69.124016 | null | gr-qc | null | Iterative solutions to fourth-order gravity describing static and
electrically charged black holes are constructed. Obtained solutions are
parametrized by two integration constants which are related to the electric
charge and the exact location of the event horizon. Special emphasis is put on
the extremal black holes... | [
{
"created": "Tue, 24 Feb 2004 09:07:24 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Tryniecki",
"Dariusz",
""
]
] | Iterative solutions to fourth-order gravity describing static and electrically charged black holes are constructed. Obtained solutions are parametrized by two integration constants which are related to the electric charge and the exact location of the event horizon. Special emphasis is put on the extremal black holes. ... |
1308.1455 | Yun Soo Myung | Yun Soo Myung | Instability of Schwarzschild-AdS black hole in Einstein-Weyl gravity | 1+13 pages, 1 figure, a version to appear in PLB | null | 10.1016/j.physletb.2013.12.019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the classical stability of Schwarzschild-AdS black hole in a
massive theory of the Einstein-Weyl gravity. It turns out that the linearized
Einstein tensor perturbations exhibit unstable modes featuring the
Gregory-Laflamme instability of five-dimensional AdS black string, in contrast
to the stable Schw... | [
{
"created": "Wed, 7 Aug 2013 00:56:10 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2013 00:34:55 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Dec 2013 04:03:48 GMT",
"version": "v3"
}
] | 2015-06-16 | [
[
"Myung",
"Yun Soo",
""
]
] | We investigate the classical stability of Schwarzschild-AdS black hole in a massive theory of the Einstein-Weyl gravity. It turns out that the linearized Einstein tensor perturbations exhibit unstable modes featuring the Gregory-Laflamme instability of five-dimensional AdS black string, in contrast to the stable Schwar... |
2203.01267 | Felipe Ferreira De Freitas | Felipe F. Freitas, Carlos A. R. Herdeiro, Ant\'onio P. Morais,
Ant\'onio Onofre, Roman Pasechnik, Eugen Radu, Nicolas Sanchis-Gual, Rui
Santos | Generating gravitational waveform libraries of exotic compact binaries
with deep learning | 20 pages, 13 figures, 4 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current gravitational wave (GW) detections rely on the existence of libraries
of theoretical waveforms. Consequently, finding new physics with GWs requires
libraries of non-standard models, which are computationally demanding. We
discuss how deep learning frameworks can be used to generate new waveforms
"learned" fro... | [
{
"created": "Wed, 2 Mar 2022 17:54:40 GMT",
"version": "v1"
}
] | 2022-03-03 | [
[
"Freitas",
"Felipe F.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Morais",
"António P.",
""
],
[
"Onofre",
"António",
""
],
[
"Pasechnik",
"Roman",
""
],
[
"Radu",
"Eugen",
""
],
[
"Sanchis-Gual",
"Nicolas",... | Current gravitational wave (GW) detections rely on the existence of libraries of theoretical waveforms. Consequently, finding new physics with GWs requires libraries of non-standard models, which are computationally demanding. We discuss how deep learning frameworks can be used to generate new waveforms "learned" from ... |
2303.06814 | Shao-Wen Wei | Shao-Wen Wei, Yu-Peng Zhang, Yu-Xiao Liu, Robert B. Mann | Static spheres around spherically symmetric black hole spacetime | 7 pages, 4 figures. Published version | Phys. Rev. Res. 5, 043050 (2023) | 10.1103/PhysRevResearch.5.043050 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Unique features of particle orbits produce novel signatures of gravitational
observable phenomena, and are quite useful in testing compact astrophysical
objects in general relativity or modified theories of gravity. Here we observe
a representative example that a static, spherically symmetric black hole
solution with... | [
{
"created": "Mon, 13 Mar 2023 02:14:33 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Oct 2023 08:15:35 GMT",
"version": "v2"
}
] | 2023-10-24 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Zhang",
"Yu-Peng",
""
],
[
"Liu",
"Yu-Xiao",
""
],
[
"Mann",
"Robert B.",
""
]
] | Unique features of particle orbits produce novel signatures of gravitational observable phenomena, and are quite useful in testing compact astrophysical objects in general relativity or modified theories of gravity. Here we observe a representative example that a static, spherically symmetric black hole solution with n... |
2405.01360 | Jos\'e Diogo Sim\~ao | Jos\'e Diogo Sim\~ao | Investigations on Lorentzian Spin-foams and Semiclassical Space-times | PhD Dissertation, 210 pages; v2: implemented minor corrections and
added additional references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis is developed in the context of the spin-foam approach to quantum
gravity; all results are concerned with the Lorentzian theory and with
semiclassical methods. A correspondence is given between Majorana 2-spinors and
time-like hypersurfaces in Minkowski 3-space based on complexified quaternions.
It is show... | [
{
"created": "Thu, 2 May 2024 15:07:58 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2024 19:03:18 GMT",
"version": "v2"
}
] | 2024-06-12 | [
[
"Simão",
"José Diogo",
""
]
] | This thesis is developed in the context of the spin-foam approach to quantum gravity; all results are concerned with the Lorentzian theory and with semiclassical methods. A correspondence is given between Majorana 2-spinors and time-like hypersurfaces in Minkowski 3-space based on complexified quaternions. It is shown ... |
2304.14754 | Sanjay Siwach | Bijendra Kumar Vishvakarma, Dharm Veer Singh and Sanjay Siwach | Shadows and quasinormal modes of the Bardeen black hole in cloud of
strings | 15 pages, 3 figures, reference added, statement about singularity at
the origin changed | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the black hole (BH) solution of the Einstein's gravity coupled
with non-linear electrodynamics (NED) source in the background of a cloud of
strings. We analyze the horizon structure of the obtained BH solution. The
optical features of the BH are explored. The photon radius and shadows of the
BH are obt... | [
{
"created": "Fri, 28 Apr 2023 10:51:04 GMT",
"version": "v1"
},
{
"created": "Tue, 2 May 2023 11:25:41 GMT",
"version": "v2"
}
] | 2023-05-03 | [
[
"Vishvakarma",
"Bijendra Kumar",
""
],
[
"Singh",
"Dharm Veer",
""
],
[
"Siwach",
"Sanjay",
""
]
] | We investigate the black hole (BH) solution of the Einstein's gravity coupled with non-linear electrodynamics (NED) source in the background of a cloud of strings. We analyze the horizon structure of the obtained BH solution. The optical features of the BH are explored. The photon radius and shadows of the BH are obtai... |
1508.04602 | Ben Whale | Ben E. Whale and Mike J. S. L. Ashley and Susan M. Scott | Generalizations of the Abstract Boundary singularity theorem | 24 pages | Class. Quantum Grav. 32 135001 (2015) | 10.1088/0264-9381/32/13/135001 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Abstract Boundary singularity theorem was first proven by Ashley and
Scott. It links the existence of incomplete causal geodesics in strongly
causal, maximally extended spacetimes to the existence of Abstract Boundary
essential singularities, i.e., non-removable singular boundary points. We give
two generalizatio... | [
{
"created": "Wed, 19 Aug 2015 11:29:55 GMT",
"version": "v1"
}
] | 2015-08-20 | [
[
"Whale",
"Ben E.",
""
],
[
"Ashley",
"Mike J. S. L.",
""
],
[
"Scott",
"Susan M.",
""
]
] | The Abstract Boundary singularity theorem was first proven by Ashley and Scott. It links the existence of incomplete causal geodesics in strongly causal, maximally extended spacetimes to the existence of Abstract Boundary essential singularities, i.e., non-removable singular boundary points. We give two generalizations... |
2003.01252 | Petya Nedkova | Efthimia Deligianni, Jutta Kunz, Petya Nedkova | Quasi-periodic oscillations from the accretion disk around distorted
black holes | 24 pages, 8 figures | Phys. Rev. D 102, 064023 (2020) | 10.1103/PhysRevD.102.064023 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasi-periodic oscillations from the accretion disk around the
distorted Schwarzschild black hole in the framework of the resonant models. We
confine ourselves to the case of a quadrupole distortion which can be caused
for example by the accreting matter flow in the vicinity of the compact object.
For th... | [
{
"created": "Mon, 2 Mar 2020 23:47:16 GMT",
"version": "v1"
}
] | 2020-09-16 | [
[
"Deligianni",
"Efthimia",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Nedkova",
"Petya",
""
]
] | We study the quasi-periodic oscillations from the accretion disk around the distorted Schwarzschild black hole in the framework of the resonant models. We confine ourselves to the case of a quadrupole distortion which can be caused for example by the accreting matter flow in the vicinity of the compact object. For the ... |
1204.6036 | Timothy H. Boyer | Timothy H. Boyer | Contrasting Classical and Quantum Vacuum States in Non-Inertial Frames | 29 pages | Found. Phys. 43, 923-947 (2013) | 10.1007/s10701-013-9726-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical electron theory with classical electromagnetic zero-point radiation
(stochastic electrodynamics) is the classical theory which most closely
approximates quantum electrodynamics. Indeed, in inertial frames, there is a
general connection between classical field theories with classical zero-point
radiation and... | [
{
"created": "Thu, 26 Apr 2012 17:36:58 GMT",
"version": "v1"
}
] | 2013-08-13 | [
[
"Boyer",
"Timothy H.",
""
]
] | Classical electron theory with classical electromagnetic zero-point radiation (stochastic electrodynamics) is the classical theory which most closely approximates quantum electrodynamics. Indeed, in inertial frames, there is a general connection between classical field theories with classical zero-point radiation and q... |
2308.06469 | Kyosuke Tomonari | Kyosuke Tomonari and Sebastian Bahamonde | Dirac-Bergmann analysis and Degrees of Freedom of Coincident
$f(Q)$-gravity | 26 pages. v2: Added references and footnotes, revised overall, for
submission. 26 pages. v3: Added new Sec. V-A and references, revised overall.
31 pages. v4: Published in EPJC (Single column version) | Eur. Phys. J. C (2024) 84:349 | 10.1140/epjc/s10052-024-12677-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the propagating degrees of freedom of $f(Q)$-gravity in a
$4$-dimensional space-time under the imposition of the coincident gauge by
performing the Dirac-Bergmann analysis. In this work, we start with a top-down
reconstruction of the metric-affine gauge theory of gravity based only on the
concept of a ... | [
{
"created": "Sat, 12 Aug 2023 05:24:17 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Aug 2023 07:44:33 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Jan 2024 08:18:10 GMT",
"version": "v3"
},
{
"created": "Wed, 24 Apr 2024 12:03:29 GMT",
"version": "v4"
}
] | 2024-04-25 | [
[
"Tomonari",
"Kyosuke",
""
],
[
"Bahamonde",
"Sebastian",
""
]
] | We investigate the propagating degrees of freedom of $f(Q)$-gravity in a $4$-dimensional space-time under the imposition of the coincident gauge by performing the Dirac-Bergmann analysis. In this work, we start with a top-down reconstruction of the metric-affine gauge theory of gravity based only on the concept of a ve... |
gr-qc/9606066 | David Langlois | David Langlois | Cosmic Microwave Background Dipole induced by double inflation | Latex, 9 pages, no figure, to appear in Phys. Rev. D | Phys.Rev.D54:2447-2450,1996 | 10.1103/PhysRevD.54.2447 | null | gr-qc astro-ph | null | The observed CMBR dipole is generally interpreted as the consequence of the
peculiar motion of the Sun with respect to the reference frame of the CMBR.
This article proposes an alternative interpretation in which the observed
dipole is the result of isocurvature perturbations on scales larger than the
present Hubble ... | [
{
"created": "Sun, 23 Jun 1996 11:18:31 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Langlois",
"David",
""
]
] | The observed CMBR dipole is generally interpreted as the consequence of the peculiar motion of the Sun with respect to the reference frame of the CMBR. This article proposes an alternative interpretation in which the observed dipole is the result of isocurvature perturbations on scales larger than the present Hubble ra... |
1809.00698 | Joel Berg\'e | Joel Berg\'e | The Inverse Square Law And Newtonian Dynamics space explorer (ISLAND) | Moriond Gravitation session 2017 proceeding + COSPAR meeting 2018 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ISLAND (Inverse Square Law And Newtonian Dynamics) Space Explorer is a
new concept to test the gravitational Inverse Square Law at: (1) submillimeter
scale and (2) at the largest Solar System scales (dozens of Astronomical Units
--AU). The main idea is to embark a torsion pendulum at the center of gravity
of a de... | [
{
"created": "Mon, 3 Sep 2018 19:35:07 GMT",
"version": "v1"
}
] | 2018-09-05 | [
[
"Bergé",
"Joel",
""
]
] | The ISLAND (Inverse Square Law And Newtonian Dynamics) Space Explorer is a new concept to test the gravitational Inverse Square Law at: (1) submillimeter scale and (2) at the largest Solar System scales (dozens of Astronomical Units --AU). The main idea is to embark a torsion pendulum at the center of gravity of a dedi... |
1012.0886 | Bruno Coutinho Mundim | Bruno C. Mundim, Bernard J. Kelly, Yosef Zlochower, Hiroyuki Nakano,
Manuela Campanelli | Hybrid black-hole binary initial data | Proceedings of Theory Meets Data Analysis at Comparable and Extreme
Mass Ratios (NRDA/Capra 2010), Perimeter Institute, June 2010 - 19 pages | Class. Quantum Grav. 28 134003 (2011) | 10.1088/0264-9381/28/13/134003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Traditional black-hole binary puncture initial data is conformally flat. This
unphysical assumption is coupled with a lack of radiation signature from the
binary's past life. As a result, waveforms extracted from evolutions of this
data display an abrupt jump. In Kelly et al. [Class.Quant.Grav.27:114005,2010],
a new ... | [
{
"created": "Sat, 4 Dec 2010 07:28:21 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Mundim",
"Bruno C.",
""
],
[
"Kelly",
"Bernard J.",
""
],
[
"Zlochower",
"Yosef",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Campanelli",
"Manuela",
""
]
] | Traditional black-hole binary puncture initial data is conformally flat. This unphysical assumption is coupled with a lack of radiation signature from the binary's past life. As a result, waveforms extracted from evolutions of this data display an abrupt jump. In Kelly et al. [Class.Quant.Grav.27:114005,2010], a new bi... |
gr-qc/0004076 | Reinhard Prix | Reinhard Prix | Covariant Vortex In Superconducting-Superfluid-Normal Fluid Mixtures
with Stiff Equation of State | 14 pages, uses RevTeX and amssymb, submitted | Phys.Rev. D62 (2000) 103005 | 10.1103/PhysRevD.62.103005 | null | gr-qc astro-ph cond-mat.supr-con | null | The integrals of motion for a cylindrically symmetric stationary vortex are
obtained in a covariant description of a mixture of interacting
superconductors, superfluids and normal fluids. The relevant integrated
stress-energy coefficients for the vortex with respect to a vortex-free
reference state are calculated in ... | [
{
"created": "Wed, 26 Apr 2000 15:55:49 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Prix",
"Reinhard",
""
]
] | The integrals of motion for a cylindrically symmetric stationary vortex are obtained in a covariant description of a mixture of interacting superconductors, superfluids and normal fluids. The relevant integrated stress-energy coefficients for the vortex with respect to a vortex-free reference state are calculated in th... |
1305.7104 | Houwen Wu | Deyou Chen, Houwen Wu, Haitang Yang | Fermion's tunnelling with effects of quantum gravity | V2, 14 pages, references added, typos corrected | Advances in High Energy Physics, vol. 2013, Article ID 432412, 6
pages, 2013 | 10.1155/2013/432412 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, using Hamilton-Jacobi method, we address the tunnelling of
fermions in a 4-dimensional Schwarzschild spacetime. Base on the generalized
uncertainty principle, we introduce the influence of quantum gravity. After
solving the equation of motion of the spin 1/2 field, we derive the corrected
Hawking tempe... | [
{
"created": "Thu, 30 May 2013 13:40:24 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jun 2013 17:24:21 GMT",
"version": "v2"
}
] | 2013-11-14 | [
[
"Chen",
"Deyou",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | In this paper, using Hamilton-Jacobi method, we address the tunnelling of fermions in a 4-dimensional Schwarzschild spacetime. Base on the generalized uncertainty principle, we introduce the influence of quantum gravity. After solving the equation of motion of the spin 1/2 field, we derive the corrected Hawking tempera... |
2001.00772 | Shuxun Tian | S. X. Tian and Zong-Hong Zhu | Revisiting scalar and tensor perturbations in a nonlocal gravity | 5 pages, PRD in press | Phys. Rev. D 100, 124059 (2019) | 10.1103/PhysRevD.100.124059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonlocal RT gravity is a successful modified gravity theory, which not only
explains the late-time cosmic acceleration but also behaves well in the solar
system. Previous analysis generally assumes the auxiliary field $S_i$ vanishes
at the cosmic background. However, we find the background $S_i$ is proportional
to $a... | [
{
"created": "Fri, 3 Jan 2020 09:58:16 GMT",
"version": "v1"
}
] | 2020-01-06 | [
[
"Tian",
"S. X.",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | Nonlocal RT gravity is a successful modified gravity theory, which not only explains the late-time cosmic acceleration but also behaves well in the solar system. Previous analysis generally assumes the auxiliary field $S_i$ vanishes at the cosmic background. However, we find the background $S_i$ is proportional to $a^2... |
2003.00388 | Angel Garcia-Chung | Angel Garcia-Chung | The symplectic group in Polymer Quantum Mechanics | 20 pages | Phys. Rev. D 101, 106004 (2020) | 10.1103/PhysRevD.101.106004 | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we provide the representation of the symplectic group $Sp(2n,
\mathbb{R})$ in polymer quantum mechanics. We derive the propagator of the
polymer free particle and the polymer harmonic oscillator without considering a
polymer scale. The polymer scale is then introduced to reconcile our results
with those... | [
{
"created": "Sun, 1 Mar 2020 03:35:41 GMT",
"version": "v1"
}
] | 2020-05-13 | [
[
"Garcia-Chung",
"Angel",
""
]
] | In this paper we provide the representation of the symplectic group $Sp(2n, \mathbb{R})$ in polymer quantum mechanics. We derive the propagator of the polymer free particle and the polymer harmonic oscillator without considering a polymer scale. The polymer scale is then introduced to reconcile our results with those e... |
2311.05652 | Ivan Arraut Dr. | Ivan Arraut | The Tully-Fisher's law and Dark Matter effects derived via modified
symmetries | 4 pages, Editor's choice at EPL | 2023 EPL 144 29003 | 10.1209/0295-5075/ad05f7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In any physical system, when we move from short to large scales, new
spacetime symmetries emerge which help us to simplify the dynamics of the
system. In this letter we demonstrate that certain variations on the symmetries
of General Relativity at large scales, generate the effects equivalent to Dark
Matter. In parti... | [
{
"created": "Wed, 8 Nov 2023 14:18:11 GMT",
"version": "v1"
}
] | 2023-11-13 | [
[
"Arraut",
"Ivan",
""
]
] | In any physical system, when we move from short to large scales, new spacetime symmetries emerge which help us to simplify the dynamics of the system. In this letter we demonstrate that certain variations on the symmetries of General Relativity at large scales, generate the effects equivalent to Dark Matter. In particu... |
2407.21522 | Albachiara Cogo | Carla Cederbaum, Albachiara Cogo and Axel Fehrenbach | Uniqueness of equipotential photon surfaces in 4-dimensional static
vacuum asymptotically flat spacetimes for positive, negative, and zero mass
-- and a new partial proof of the Willmore inequality | null | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present different proofs of the uniqueness of 4-dimensional static vacuum
asymptotically flat spacetimes containing a connected equipotential photon
surface or in particular a connected photon sphere. We do not assume that the
equipotential photon surface is outward directed or non-degenerate and hence
cover not o... | [
{
"created": "Wed, 31 Jul 2024 10:49:21 GMT",
"version": "v1"
}
] | 2024-08-01 | [
[
"Cederbaum",
"Carla",
""
],
[
"Cogo",
"Albachiara",
""
],
[
"Fehrenbach",
"Axel",
""
]
] | We present different proofs of the uniqueness of 4-dimensional static vacuum asymptotically flat spacetimes containing a connected equipotential photon surface or in particular a connected photon sphere. We do not assume that the equipotential photon surface is outward directed or non-degenerate and hence cover not onl... |
2002.11471 | Kazuharu Bamba | G.G.L. Nashed, Amare Abebe and Kazuharu Bamba | Neutral compact spherically symmetric stars in teleparallel gravity | 13 pages, 9 figures | Eur. Phys. J. C (2020) 80:1109 | 10.1140/epjc/s10052-020-08671-8 | FU-PCG-72 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present novel neutral and uncharged solutions that describe the cluster of
Einstein in the teleparallel equivalent of general relativity (TEGR). To this
end, we use a tetrad field with non-diagonal spherical symmetry which gives the
vanishing of the off-diagonal components for the gravitational field equations
in ... | [
{
"created": "Wed, 5 Feb 2020 09:53:25 GMT",
"version": "v1"
}
] | 2023-11-22 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Abebe",
"Amare",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | We present novel neutral and uncharged solutions that describe the cluster of Einstein in the teleparallel equivalent of general relativity (TEGR). To this end, we use a tetrad field with non-diagonal spherical symmetry which gives the vanishing of the off-diagonal components for the gravitational field equations in th... |
1401.7312 | Swastik Bhattacharya | Swastik Bhattacharya | A new proposal regarding the heat generated by gravity in locally
accelerating frames | 27 pages, 1 Figure | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For Rindler observers accelerating close to the horizon in local patches
around a spacetime point, the matter-energy passing through the horizon
increases the entropy and heat energy. Jacobson has showed that the Einstein
equation can be derived from the consideration of this thermodynamic process.
This, however, wor... | [
{
"created": "Tue, 28 Jan 2014 20:12:11 GMT",
"version": "v1"
}
] | 2014-01-29 | [
[
"Bhattacharya",
"Swastik",
""
]
] | For Rindler observers accelerating close to the horizon in local patches around a spacetime point, the matter-energy passing through the horizon increases the entropy and heat energy. Jacobson has showed that the Einstein equation can be derived from the consideration of this thermodynamic process. This, however, works... |
gr-qc/0609051 | Mayeul Arminjon | Mayeul Arminjon | On the extension of Newton's second law to theories of gravitation in
curved space-time | 32 pages | Arch.Mech. 48 (1996) 551-576 | null | null | gr-qc | null | We investigate the possibility of extending Newton's second law to the
general framework of theories in which special relativity is locally valid, and
in which gravitation changes the flat Galilean space-time metric into a curved
metric. This framework is first recalled, underlining the possibility to
uniquely define... | [
{
"created": "Thu, 14 Sep 2006 12:16:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arminjon",
"Mayeul",
""
]
] | We investigate the possibility of extending Newton's second law to the general framework of theories in which special relativity is locally valid, and in which gravitation changes the flat Galilean space-time metric into a curved metric. This framework is first recalled, underlining the possibility to uniquely define a... |
2212.06205 | Riasat Ali | Zunaira Akhtar, Rimsha Babar, Riasat Ali | Thermal Fluctuations Evolution of the New Schwarzschild Black Hole | 11 pages, 14 figures, version accepted for publication in Annals of
Physics | null | 10.1016/j.aop.2022.169190 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We study the thermodynamic analysis and logarithm corrections of the new
Schwarzschild black hole. We compute the thermodynamic quantities like entropy,
Hawking temperature and heat capacity. The area of black holes never decreases
because they absorb everything from their surroundings due to high gravity. In
this re... | [
{
"created": "Mon, 12 Dec 2022 19:28:28 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Akhtar",
"Zunaira",
""
],
[
"Babar",
"Rimsha",
""
],
[
"Ali",
"Riasat",
""
]
] | We study the thermodynamic analysis and logarithm corrections of the new Schwarzschild black hole. We compute the thermodynamic quantities like entropy, Hawking temperature and heat capacity. The area of black holes never decreases because they absorb everything from their surroundings due to high gravity. In this rega... |
gr-qc/0612089 | Rong-Gen Cai | M. Akbar and Rong-Gen Cai | Thermodynamic Behavior of Field Equations for f(R) Gravity | Latex 16 pages, v2: one reference added | Phys.Lett.B648:243-248,2007 | 10.1016/j.physletb.2007.03.005 | null | gr-qc hep-th | null | Recently it has shown that Einstein's field equations can be rewritten into a
form of the first law of thermodynamics both at event horizon of static
spherically symmetric black holes and apparent horizon of
Friedmann-Robertson-Walker (FRW) universe, which indicates intrinsic
thermodynamic properties of spacetime hor... | [
{
"created": "Thu, 14 Dec 2006 06:55:45 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2007 06:19:05 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Akbar",
"M.",
""
],
[
"Cai",
"Rong-Gen",
""
]
] | Recently it has shown that Einstein's field equations can be rewritten into a form of the first law of thermodynamics both at event horizon of static spherically symmetric black holes and apparent horizon of Friedmann-Robertson-Walker (FRW) universe, which indicates intrinsic thermodynamic properties of spacetime horiz... |
2106.11771 | Marie-No\"elle C\'el\'erier | Marie-No\"elle C\'el\'erier (Laboratoire Univers et TH\'eories,
Observatoire de Paris) | New classes of exact interior nonvacuum solutions to the GR field
equations for spacetimes sourced by a rigidly rotating stationary cylindrical
anisotropic fluid | 10 pages, 0 figure. arXiv admin note: text overlap with
arXiv:2004.02636, significant additions, final text complying with the
published version | Phys. Rev. D 104, 064040 (2021) | 10.1103/PhysRevD.104.064040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A double new class of solutions to the general relativity field equations
describing interior spacetimes sourced by stationary cylindrical anisotropic
fluids with principal stress directed along the symmetry axis is displayed.
These solutions are required to satisfy regularity and junction conditions so
that they can... | [
{
"created": "Sun, 20 Jun 2021 13:37:57 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Jul 2021 09:08:26 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Sep 2021 07:10:51 GMT",
"version": "v3"
}
] | 2021-09-22 | [
[
"Célérier",
"Marie-Noëlle",
"",
"Laboratoire Univers et THéories,\n Observatoire de Paris"
]
] | A double new class of solutions to the general relativity field equations describing interior spacetimes sourced by stationary cylindrical anisotropic fluids with principal stress directed along the symmetry axis is displayed. These solutions are required to satisfy regularity and junction conditions so that they can b... |
2111.01779 | Thiago Barbosa Guerreiro | Thiago Guerreiro, Francesco Coradeschi, Antonia Micol Frassino,
Jennifer Rittenhouse West, Enrico Junior Schioppa | Quantum signatures in nonlinear gravitational waves | 16 pages, 2 figures; accepted final version, expanded work, added
quantum state reconstruction and more detailed calculations and information,
comments welcome | Quantum 6, 879 (2022) | 10.22331/q-2022-12-19-879 | null | gr-qc hep-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | The effective quantum field theory description of gravity, despite its
non-renormalizability, allows for predictions beyond classical general
relativity. As we enter the age of gravitational wave astronomy, an important
and timely question is whether measurable quantum predictions that depart from
classical gravity, ... | [
{
"created": "Tue, 2 Nov 2021 17:55:53 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2022 20:07:51 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Sep 2022 19:29:05 GMT",
"version": "v3"
},
{
"created": "Wed, 14 Dec 2022 23:52:31 GMT",
"version": "v4"
}
] | 2022-12-21 | [
[
"Guerreiro",
"Thiago",
""
],
[
"Coradeschi",
"Francesco",
""
],
[
"Frassino",
"Antonia Micol",
""
],
[
"West",
"Jennifer Rittenhouse",
""
],
[
"Schioppa",
"Enrico Junior",
""
]
] | The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age of gravitational wave astronomy, an important and timely question is whether measurable quantum predictions that depart from classical gravity, an... |
0806.2683 | Mariusz Dabrowski P. | Mariusz P. Dabrowski, Janusz Garecki and David B. Blaschke | Conformal transformations and conformal invariance in gravitation | REVTEX 4, 28 pages, no figures, version to match a published paper | Annalen Phys. (Berlin) 18 (2009), 13-32. | null | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Conformal transformations are frequently used tools in order to study
relations between various theories of gravity and the Einstein relativity. In
this paper we discuss the rules of these transformations for geometric
quantities as well as for the matter energy-momentum tensor. We show the
subtlety of the matter ene... | [
{
"created": "Mon, 16 Jun 2008 22:13:42 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jul 2008 21:13:59 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Jan 2009 16:47:02 GMT",
"version": "v3"
}
] | 2009-02-20 | [
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Garecki",
"Janusz",
""
],
[
"Blaschke",
"David B.",
""
]
] | Conformal transformations are frequently used tools in order to study relations between various theories of gravity and the Einstein relativity. In this paper we discuss the rules of these transformations for geometric quantities as well as for the matter energy-momentum tensor. We show the subtlety of the matter energ... |
2003.02741 | Andrzej Borowiec | Andrzej Borowiec, Aleksander Kozak | New class of hybrid metric-Palatini scalar-tensor theories of gravity | 34 pages in LaTeX, comments and references added, final version
published in JCAP | JCAP07(2020)003 | 10.1088/1475-7516/2020/07/003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of scalar-tensor theories (STT) including a non-metricity that
unifies metric, Palatini and hybrid metric-Palatini gravitational actions with
non-minimal interaction is proposed and investigated from the point of view of
their consistency with generalized conformal transformations. It is shown that
every such... | [
{
"created": "Thu, 5 Mar 2020 16:12:54 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2020 17:22:06 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Jul 2020 20:58:39 GMT",
"version": "v3"
}
] | 2020-07-03 | [
[
"Borowiec",
"Andrzej",
""
],
[
"Kozak",
"Aleksander",
""
]
] | A class of scalar-tensor theories (STT) including a non-metricity that unifies metric, Palatini and hybrid metric-Palatini gravitational actions with non-minimal interaction is proposed and investigated from the point of view of their consistency with generalized conformal transformations. It is shown that every such t... |
1312.1322 | Farhad Darabi | F. Darabi, A. Parsiya | Cosmology with non-minimal coupled gravity: inflation and perturbation
analysis | Reference added | Class. Quantum Grav. 32 (2015) 155005 | 10.1088/0264-9381/32/15/155005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a scalar-tensor cosmological model where the Einstein tensor is
non-minimally coupled to the free scalar field dynamics. Using FRW metric, we
investigate the behavior of scale factor for vacuum, matter and dark energy
dominated eras. Especially, we focus on the inflationary behavior at early
universe. Moreov... | [
{
"created": "Wed, 4 Dec 2013 20:42:55 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jul 2014 08:44:55 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Jul 2015 04:44:16 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Jul 2015 12:50:16 GMT",
"version": "v4"
}
] | 2015-08-06 | [
[
"Darabi",
"F.",
""
],
[
"Parsiya",
"A.",
""
]
] | We study a scalar-tensor cosmological model where the Einstein tensor is non-minimally coupled to the free scalar field dynamics. Using FRW metric, we investigate the behavior of scale factor for vacuum, matter and dark energy dominated eras. Especially, we focus on the inflationary behavior at early universe. Moreover... |
2012.14518 | Marcus Reitz | Joren Brunekreef, Marcus Reitz | Approximate Killing symmetries in non-perturbative quantum gravity | 39 pages, 15 figures | null | 10.1088/1361-6382/abf412 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is an open question whether fluctuations at the Planck scale in a
non-perturbative theory of quantum gravity behave in such a way that the
resulting semi-classical geometry can be modelled by a space that admits
(approximate) Killing symmetries. We have investigated whether the notion of
approximate Killing vector... | [
{
"created": "Mon, 28 Dec 2020 22:56:29 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Brunekreef",
"Joren",
""
],
[
"Reitz",
"Marcus",
""
]
] | It is an open question whether fluctuations at the Planck scale in a non-perturbative theory of quantum gravity behave in such a way that the resulting semi-classical geometry can be modelled by a space that admits (approximate) Killing symmetries. We have investigated whether the notion of approximate Killing vector f... |
gr-qc/9902080 | Fredrik Andersson | F. Andersson and S. B. Edgar | Local Existence of Spinor- and Tensor Potentials | 28 pages, LaTeX; paper expanded with additional results | null | null | null | gr-qc | null | We give new simple direct proofs in all spacetimes for the existence of
asymmetric $(n,m+1)$-spinor potentials for completely symmetric
$(n+1,m)$-spinors and for the existence of symmetric $(n,1)$-spinor potentials
for symmetric $(n+1,0)$-spinors. These proofs introduce a `superpotential',
i.e., a potential of the po... | [
{
"created": "Thu, 25 Feb 1999 09:32:20 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jan 2000 10:46:46 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Andersson",
"F.",
""
],
[
"Edgar",
"S. B.",
""
]
] | We give new simple direct proofs in all spacetimes for the existence of asymmetric $(n,m+1)$-spinor potentials for completely symmetric $(n+1,m)$-spinors and for the existence of symmetric $(n,1)$-spinor potentials for symmetric $(n+1,0)$-spinors. These proofs introduce a `superpotential', i.e., a potential of the pote... |
2207.12226 | Everett Patterson | Everett Patterson, Robert B. Mann | Fisher Information of a Black Hole Spacetime | 23 pages, 8 figures | null | 10.1007/JHEP06(2023)214 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | Relativistic quantum metrology is the study of optimal measurement procedures
within systems that have both quantum and relativistic components. Here we use
Unruh-DeWitt detectors coupled to a massless scalar field as probes of thermal
parameters in different spacetimes via a relativistic quantum metrology
analysis. ... | [
{
"created": "Mon, 25 Jul 2022 14:27:01 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Mar 2023 01:34:26 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Patterson",
"Everett",
""
],
[
"Mann",
"Robert B.",
""
]
] | Relativistic quantum metrology is the study of optimal measurement procedures within systems that have both quantum and relativistic components. Here we use Unruh-DeWitt detectors coupled to a massless scalar field as probes of thermal parameters in different spacetimes via a relativistic quantum metrology analysis. We... |
gr-qc/9912098 | Folomeev V. N. | V.N. Folomeev, V.Ts. Gurovich and I.V. Tokareva | Generation of the Scalar Field and Anisotropy at Quantum Creation of the
Closed Universe | 12 pages, Latex, 1 figure | Nuovo Cim. B115 (2000) 1091-1100 | null | null | gr-qc | null | The behaviour of the wave function of the Universe under the barrier for
anisotropic cosmological Bianchi type IX model with account of influence of the
scalar field is explored. In view of known difficulties with interpretation of
multidimensional wave functions the method of reduction of such problems to
one-dimens... | [
{
"created": "Thu, 23 Dec 1999 04:21:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Folomeev",
"V. N.",
""
],
[
"Gurovich",
"V. Ts.",
""
],
[
"Tokareva",
"I. V.",
""
]
] | The behaviour of the wave function of the Universe under the barrier for anisotropic cosmological Bianchi type IX model with account of influence of the scalar field is explored. In view of known difficulties with interpretation of multidimensional wave functions the method of reduction of such problems to one-dimensio... |
1805.12304 | Bo Wang | Yang Zhang, Bo Wang | Adiabatic regularization of power spectrum and stress tensor of relic
gravitational wave without low-frequency distortion | 39 pages, 20 figures. Fix a typo in eq.(2.8) | JCAP 11(2018)006 | 10.1088/1475-7516/2018/11/006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Adiabatic regularization is a method to remove UV divergences in quantum
fields in curved spacetime. For relic gravitational wave generated during
inflation, regularization on all $k$-modes of the power spectrum to 2nd
adiabatic order, and of the energy density and pressure to 4th order,
respectively, causes low-freq... | [
{
"created": "Thu, 31 May 2018 03:23:17 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jun 2019 13:22:04 GMT",
"version": "v10"
},
{
"created": "Wed, 25 Jul 2018 01:30:13 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Sep 2018 13:29:32 GMT",
"version": "v3"
},
{
"... | 2019-06-27 | [
[
"Zhang",
"Yang",
""
],
[
"Wang",
"Bo",
""
]
] | Adiabatic regularization is a method to remove UV divergences in quantum fields in curved spacetime. For relic gravitational wave generated during inflation, regularization on all $k$-modes of the power spectrum to 2nd adiabatic order, and of the energy density and pressure to 4th order, respectively, causes low-freque... |
gr-qc/0001039 | Tonatiuh Matos | Tonatiuh Matos, Dario Nu\~nez, Gabino Estevez and Maribel Rios | Rotating 5D-Kaluza-Klein Space-Times from Invariant Transformations | 24 pages, latex, no figures. To appear in Gen. Rel. Grav., 32,
(2000), in press | Gen.Rel.Grav.32:1499-1525,2000 | 10.1023/A:1001982001694 | CINVESTAV-00/Fis-8 | gr-qc | null | Using invariant transformations of the five-dimensional Kaluza-Klein (KK)
field equations, we find a series of formulae to derive axial symmetric
stationary exact solutions of the KK theory starting from static ones. The
procedure presented in this work allows to derive new exact solutions up to
very simple integrati... | [
{
"created": "Fri, 14 Jan 2000 18:03:40 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Matos",
"Tonatiuh",
""
],
[
"Nuñez",
"Dario",
""
],
[
"Estevez",
"Gabino",
""
],
[
"Rios",
"Maribel",
""
]
] | Using invariant transformations of the five-dimensional Kaluza-Klein (KK) field equations, we find a series of formulae to derive axial symmetric stationary exact solutions of the KK theory starting from static ones. The procedure presented in this work allows to derive new exact solutions up to very simple integration... |
2206.07925 | Nils A. Nilsson | Nils A. Nilsson | SME Gravity in the Early Universe | Presented at the Ninth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, May 17-26, 2022 | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this talk, we give a short overview of recent work on cosmological
solutions within the SME gravitational sector under the assumption of explicit
spacetime-symmetry breaking. We show that for the special case of timelike
diffeomorphism breaking, the resulting Friedmann equations can be written as
standard FLRW cos... | [
{
"created": "Thu, 16 Jun 2022 05:03:13 GMT",
"version": "v1"
}
] | 2022-06-17 | [
[
"Nilsson",
"Nils A.",
""
]
] | In this talk, we give a short overview of recent work on cosmological solutions within the SME gravitational sector under the assumption of explicit spacetime-symmetry breaking. We show that for the special case of timelike diffeomorphism breaking, the resulting Friedmann equations can be written as standard FLRW cosmo... |
gr-qc/0303114 | V. Suneeta | V. Suneeta | Quasinormal modes for the SdS black hole : an analytical approximation
scheme | 12 pages, revtex, refs added and discussion expanded, version to
appear in Phys. Rev. D | Phys.Rev. D68 (2003) 024020 | 10.1103/PhysRevD.68.024020 | null | gr-qc hep-th | null | Quasinormal modes for scalar field perturbations of a Schwarzschild-de Sitter
(SdS) black hole are investigated. An analytical approximation is proposed for
the problem. The quasinormal modes are evaluated for this approximate model in
the limit when black hole mass is much smaller than the radius of curvature of
the... | [
{
"created": "Mon, 31 Mar 2003 16:08:03 GMT",
"version": "v1"
},
{
"created": "Mon, 26 May 2003 09:51:17 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Suneeta",
"V.",
""
]
] | Quasinormal modes for scalar field perturbations of a Schwarzschild-de Sitter (SdS) black hole are investigated. An analytical approximation is proposed for the problem. The quasinormal modes are evaluated for this approximate model in the limit when black hole mass is much smaller than the radius of curvature of the s... |
1101.4890 | Hongwei Xiong | Hongwei Xiong | Abnormal Quantum Gravity Effect: Experimental Scheme with Superfluid
Helium Sphere and Applications to Accelerating Universe | Much better presentation has been given in my published paper
"Repulsive gravitational effect of a quantum wave packet and experimental
scheme with superfluid helium" (Front. Phys. 10, 100401 (2015)) [See
arXiv:1101.1270] and another paper "On the quantitative calculation of the
cosmological constant of the qua... | null | null | null | gr-qc astro-ph.CO cond-mat.quant-gas hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the general assumption that gravity originates from the coupling and
thermal equilibrium between matter and vacuum, after a derivation of Newton's
law of gravitation and an interpretation of the attractive gravity force
between two classical objects, we consider the macroscopic quantum gravity
effect for particl... | [
{
"created": "Tue, 25 Jan 2011 18:31:52 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Feb 2011 11:15:04 GMT",
"version": "v2"
},
{
"created": "Wed, 25 May 2011 07:46:38 GMT",
"version": "v3"
},
{
"created": "Tue, 4 Dec 2018 12:05:57 GMT",
"version": "v4"
}
] | 2018-12-05 | [
[
"Xiong",
"Hongwei",
""
]
] | From the general assumption that gravity originates from the coupling and thermal equilibrium between matter and vacuum, after a derivation of Newton's law of gravitation and an interpretation of the attractive gravity force between two classical objects, we consider the macroscopic quantum gravity effect for particles... |
2202.09543 | Rahul Nigam | Suraj Maurya, Sashideep Gutti, Rahul Nigam | Volume of a rotating black hole in 2+1 dimensions | null | Phys. Lett. B 833, 137381 (2022) | 10.1016/j.physletb.2022.137381 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this article we apply the technique for maximal volume estimation of a
black hole developed by Christodoulou and Rovelli for Schwarzchild blackhole
and by Zhang et al for non rotating BTZ black hole, to the case of a rotating
black hole in 2+1 dimensions. We derive the equation of the maximal
hypersurface for the ... | [
{
"created": "Sat, 19 Feb 2022 07:38:41 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Maurya",
"Suraj",
""
],
[
"Gutti",
"Sashideep",
""
],
[
"Nigam",
"Rahul",
""
]
] | In this article we apply the technique for maximal volume estimation of a black hole developed by Christodoulou and Rovelli for Schwarzchild blackhole and by Zhang et al for non rotating BTZ black hole, to the case of a rotating black hole in 2+1 dimensions. We derive the equation of the maximal hypersurface for the ro... |
1208.0941 | Luis P. Chimento | Luis P. Chimento, Adriana E. Cossarini and Alejandro S. Jakubi | Exact self-interacting scalar field cosmologies | 5 pages | Proceedings of the conference in celebration of the 65 th Birthday
of Professor Jerzy Plebanski. M\'exico DF, M\'exico, 2-4 June 1993. (World
Scientific, Singapore, 1994) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve isotropic, homogeneous cosmological models containing a
self-interacting scalar field. Calculations are performed in four and
two-dimensional spacetimes. We find several exact solutions that have an
inflationary regime or has a final Friedmann stage. Also their asymptotically
stability is studied.
| [
{
"created": "Sat, 4 Aug 2012 15:27:30 GMT",
"version": "v1"
}
] | 2012-08-07 | [
[
"Chimento",
"Luis P.",
""
],
[
"Cossarini",
"Adriana E.",
""
],
[
"Jakubi",
"Alejandro S.",
""
]
] | We solve isotropic, homogeneous cosmological models containing a self-interacting scalar field. Calculations are performed in four and two-dimensional spacetimes. We find several exact solutions that have an inflationary regime or has a final Friedmann stage. Also their asymptotically stability is studied. |
gr-qc/0308066 | Stefan Haesen | Stefan Haesen, Leopold Verstraelen | Ideally embedded space-times | layout changed and typos corrected; uses revtex4 | J.Math.Phys. 45 (2004) 1497-1510 | 10.1063/1.1668333 | null | gr-qc | null | Due to the growing interest in embeddings of space-time in higher-dimensional
spaces we consider a specific type of embedding. After proving an inequality
between intrinsically defined curvature invariants and the squared mean
curvature, we extend the notion of ideal embeddings from Riemannian geometry to
the indefin... | [
{
"created": "Thu, 21 Aug 2003 11:48:53 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Apr 2004 11:37:43 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Haesen",
"Stefan",
""
],
[
"Verstraelen",
"Leopold",
""
]
] | Due to the growing interest in embeddings of space-time in higher-dimensional spaces we consider a specific type of embedding. After proving an inequality between intrinsically defined curvature invariants and the squared mean curvature, we extend the notion of ideal embeddings from Riemannian geometry to the indefinit... |
gr-qc/0401007 | Sung Won Kim | Sung-Won Kim | Gravitational perturbation of traversable wormhole | 7 pages, Revtex4, 4 figures | null | null | null | gr-qc | null | In this paper, we study the perturbation problem of the scalar,
electromagnetic, and gravitational waves under the traversable Lorentzian
wormhole geometry. The unified form of the potential for the Schr\"odinger type
one-dimensional wave equation is found.
| [
{
"created": "Sat, 3 Jan 2004 06:58:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kim",
"Sung-Won",
""
]
] | In this paper, we study the perturbation problem of the scalar, electromagnetic, and gravitational waves under the traversable Lorentzian wormhole geometry. The unified form of the potential for the Schr\"odinger type one-dimensional wave equation is found. |
1808.09081 | Brian Dolan | Brian P Dolan | The definition of mass in asymptotically de Sitter space-times | 12 pages plus one 5 page appendix | null | 10.1088/1361-6382/ab0bdb | DIAS-STP-18-10 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An invariant definition of mass in asymptotically de-Sitter space-times is
given that relies on the existence of a time-like Killing vector on a sphere
surrounding the mass but does not require going to an asymptotic region. In
particular the mass can be calculated exactly on a sphere inside the
cosmological horizon.... | [
{
"created": "Tue, 28 Aug 2018 01:25:20 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Dolan",
"Brian P",
""
]
] | An invariant definition of mass in asymptotically de-Sitter space-times is given that relies on the existence of a time-like Killing vector on a sphere surrounding the mass but does not require going to an asymptotic region. In particular the mass can be calculated exactly on a sphere inside the cosmological horizon. T... |
0903.0100 | Thomas Prince | Bernard F. Schutz, Joan Centrella, Curt Cutler, Scott A. Hughes | Will Einstein Have the Last Word on Gravity? | Science White Paper submitted to the Astro2010 Decadal Survey | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a whitepaper submitted to the 2010 Astronomy Decadal Review process,
addressing the potential tests of gravity theory that could be made by
observations of gravitational waves in the milliHertz frequency band by the
proposed ESA-NASA gravitational wave observatory LISA. A key issue is that
observations in thi... | [
{
"created": "Sat, 28 Feb 2009 19:44:21 GMT",
"version": "v1"
}
] | 2009-03-03 | [
[
"Schutz",
"Bernard F.",
""
],
[
"Centrella",
"Joan",
""
],
[
"Cutler",
"Curt",
""
],
[
"Hughes",
"Scott A.",
""
]
] | This is a whitepaper submitted to the 2010 Astronomy Decadal Review process, addressing the potential tests of gravity theory that could be made by observations of gravitational waves in the milliHertz frequency band by the proposed ESA-NASA gravitational wave observatory LISA. A key issue is that observations in this ... |
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