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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1606.08880 | Anna Ijjas | Anna Ijjas and Paul J. Steinhardt | Classically stable non-singular cosmological bounces | 5 pages, 3 figures; v2 is updated to match the PRL version; v3: minor
correction to the Caption of Fig.3 | Phys. Rev. Lett. 117, 121304 (2016) | 10.1103/PhysRevLett.117.121304 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the fundamental questions of theoretical cosmology is whether the
universe can undergo a non-singular bounce, i.e., smoothly transit from a
period of contraction to a period of expansion through violation of the null
energy condition (NEC) at energies well below the Planck scale and at finite
values of the sca... | [
{
"created": "Tue, 28 Jun 2016 20:46:05 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Sep 2016 17:06:11 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Nov 2020 16:08:56 GMT",
"version": "v3"
}
] | 2020-11-26 | [
[
"Ijjas",
"Anna",
""
],
[
"Steinhardt",
"Paul J.",
""
]
] | One of the fundamental questions of theoretical cosmology is whether the universe can undergo a non-singular bounce, i.e., smoothly transit from a period of contraction to a period of expansion through violation of the null energy condition (NEC) at energies well below the Planck scale and at finite values of the scale... |
1506.02805 | Jing-Bo Wang | Chao-Guang Huang and Jingbo Wang | Reformulation of Boundary BF Theory Approach to Statistical Explanation
of the Entropy of Isolated Horizons | 17 pages, no figures | null | 10.1007/s10714-016-2110-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown in this paper that the symplectic form for the system consisting
of $D$-dimensional bulk Palatini gravity and SO$(1,1)$ BF theory on an isolated
horizon as a boundary just contains the bulk term. An alternative quantization
procedure for the boundary BF theory is presented. The area entropy is
determined ... | [
{
"created": "Tue, 9 Jun 2015 07:33:39 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Huang",
"Chao-Guang",
""
],
[
"Wang",
"Jingbo",
""
]
] | It is shown in this paper that the symplectic form for the system consisting of $D$-dimensional bulk Palatini gravity and SO$(1,1)$ BF theory on an isolated horizon as a boundary just contains the bulk term. An alternative quantization procedure for the boundary BF theory is presented. The area entropy is determined by... |
1902.07748 | Sandipan Sengupta | Suvikranth Gera and Sandipan Sengupta | Taming Dirac strings and timelike loops in vacuum gravity | 17 pages | Phys. Rev. D 99, 124038 (2019) | 10.1103/PhysRevD.99.124038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of singularities associated with Dirac strings and closed
timelike curves in classical solutions of pure gravity is analyzed here. A
method to eliminate these is introduced and established first for the Taub-NUT
geometry. This is superceded by a smooth solution of first order field
equations, which is def... | [
{
"created": "Wed, 20 Feb 2019 19:41:51 GMT",
"version": "v1"
}
] | 2019-07-03 | [
[
"Gera",
"Suvikranth",
""
],
[
"Sengupta",
"Sandipan",
""
]
] | The problem of singularities associated with Dirac strings and closed timelike curves in classical solutions of pure gravity is analyzed here. A method to eliminate these is introduced and established first for the Taub-NUT geometry. This is superceded by a smooth solution of first order field equations, which is defin... |
1709.05201 | Abhik Kumar Sanyal Dr. | Ranajit Mandal and Abhik Kumar Sanyal | Equivalent and inequivalent canonical structures of higher order
theories of gravity | 21 pages, 0 figures | Phys.Rev.D96, 084025 (2017) | 10.1103/PhysRevD.96.084025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Canonical formulation of higher order theory of gravity can only be
accomplished associating additional degrees of freedom, which are extrinsic
curvature tensor. Consequently, to match Cauchy data with the boundary data,
terms in addition to the three-space metric, must also be fixed at the
boundary. While, in all th... | [
{
"created": "Fri, 15 Sep 2017 13:42:04 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2018 06:31:39 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Aug 2018 16:05:53 GMT",
"version": "v3"
}
] | 2018-08-16 | [
[
"Mandal",
"Ranajit",
""
],
[
"Sanyal",
"Abhik Kumar",
""
]
] | Canonical formulation of higher order theory of gravity can only be accomplished associating additional degrees of freedom, which are extrinsic curvature tensor. Consequently, to match Cauchy data with the boundary data, terms in addition to the three-space metric, must also be fixed at the boundary. While, in all the ... |
1608.04297 | Paul Frampton | G. Chapline and P.H. Frampton | A new direction for dark matter research: intermediate mass compact halo
objects | Typos corrected | null | 10.1088/1475-7516/2016/11/042 | null | gr-qc astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The failure to find evidence for elementary particles that could serve as the
constituents of dark matter brings to mind suggestions that dark matter might
consist of massive compact objects (MACHOs). In particular, it has recently
been argued that MACHOs with masses > 15 solar masses may have been
prolifically produ... | [
{
"created": "Fri, 12 Aug 2016 13:09:33 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Aug 2016 11:42:16 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Nov 2016 13:00:47 GMT",
"version": "v3"
}
] | 2016-12-07 | [
[
"Chapline",
"G.",
""
],
[
"Frampton",
"P. H.",
""
]
] | The failure to find evidence for elementary particles that could serve as the constituents of dark matter brings to mind suggestions that dark matter might consist of massive compact objects (MACHOs). In particular, it has recently been argued that MACHOs with masses > 15 solar masses may have been prolifically produce... |
1009.2596 | Alan D. Rendall | Alan D. Rendall and Juan J. L. Velazquez | A class of dust-like self-similar solutions of the massless
Einstein-Vlasov system | 47 pages | Annales Henri Poincare 12:919-964,2011 | 10.1007/s00023-011-0094-3 | AEI-2010-149, ESI 2268 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper the existence of a class of self-similar solutions of the
Einstein-Vlasov system is proved. The initial data for these solutions are not
smooth, with their particle density being supported in a submanifold of
codimension one. They can be thought of as intermediate between smooth
solutions of the Einstei... | [
{
"created": "Tue, 14 Sep 2010 09:16:08 GMT",
"version": "v1"
}
] | 2011-05-18 | [
[
"Rendall",
"Alan D.",
""
],
[
"Velazquez",
"Juan J. L.",
""
]
] | In this paper the existence of a class of self-similar solutions of the Einstein-Vlasov system is proved. The initial data for these solutions are not smooth, with their particle density being supported in a submanifold of codimension one. They can be thought of as intermediate between smooth solutions of the Einstein-... |
2404.03744 | Shahar Hod | Shahar Hod | Super-extremal black holes in the quasitopological electromagnetic field
theory | 5 pages | The European Physical Journal C 84, 111 (2024) | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | It has recently been proved that a simple generalization of electromagnetism,
referred to as quasitopological electromagnetic field theory, is characterized
by the presence of dyonic black-hole solutions of the Einstein field equations
that, in certain parameter regions, are characterized by four horizons. In the
pre... | [
{
"created": "Thu, 4 Apr 2024 18:31:38 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Hod",
"Shahar",
""
]
] | It has recently been proved that a simple generalization of electromagnetism, referred to as quasitopological electromagnetic field theory, is characterized by the presence of dyonic black-hole solutions of the Einstein field equations that, in certain parameter regions, are characterized by four horizons. In the prese... |
gr-qc/0405131 | Jorge Pullin | Cayetano Di Bartolo, Rodolfo Gambini, Rafael Porto, Jorge Pullin | Dirac-like approach for consistent discretizations of classical
constrained theories | 11 pages, RevTeX | J.Math.Phys. 46 (2005) 012901 | 10.1063/1.1823030 | LSU-REL-052604 | gr-qc hep-lat hep-th physics.class-ph | null | We analyze the canonical treatment of classical constrained mechanical
systems formulated with a discrete time. We prove that under very general
conditions, it is possible to introduce nonsingular canonical transformations
that preserve the constraint surface and the Poisson or Dirac bracket
structure. The conditions... | [
{
"created": "Wed, 26 May 2004 17:51:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Di Bartolo",
"Cayetano",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Porto",
"Rafael",
""
],
[
"Pullin",
"Jorge",
""
]
] | We analyze the canonical treatment of classical constrained mechanical systems formulated with a discrete time. We prove that under very general conditions, it is possible to introduce nonsingular canonical transformations that preserve the constraint surface and the Poisson or Dirac bracket structure. The conditions f... |
gr-qc/9511024 | James H. Horne | Rufus S. Hamade, James H. Horne, and John M. Stewart | Continuous Self-Similarity and $S$-Duality | 17 pages, harvmac, six figures uuencoded in separate file | Class.Quant.Grav.13:2241-2254,1996 | 10.1088/0264-9381/13/8/017 | null | gr-qc | null | We study the spherically symmetric collapse of the axion/dilaton system
coupled to gravity. We show numerically that the critical solution at the
threshold of black hole formation is continuously self-similar. Numerical and
analytical arguments both demonstrate that the mass scaling away from
criticality has a critic... | [
{
"created": "Mon, 6 Nov 1995 16:51:08 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Nov 1995 06:23:02 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Hamade",
"Rufus S.",
""
],
[
"Horne",
"James H.",
""
],
[
"Stewart",
"John M.",
""
]
] | We study the spherically symmetric collapse of the axion/dilaton system coupled to gravity. We show numerically that the critical solution at the threshold of black hole formation is continuously self-similar. Numerical and analytical arguments both demonstrate that the mass scaling away from criticality has a critical... |
gr-qc/0008063 | Susumu Higaki | Susumu Higaki, Akihiro Ishibashi, Daisuke Ida | Instability of a membrane intersecting a black hole | 12 pages, 3 figures, to be published in Physical Review D | Phys.Rev. D63 (2001) 025002 | 10.1103/PhysRevD.63.025002 | KUNS-1679, YITP-00-46 | gr-qc astro-ph hep-th | null | The stability of a Nambu-Goto membrane at the equatorial plane of the
Reissner-Nordstr{\o}m-de Sitter spacetime is studied. The covariant
perturbation formalism is applied to study the behavior of the perturbation of
the membrane. The perturbation equation is solved numerically. It is shown that
a membrane intersecti... | [
{
"created": "Sun, 27 Aug 2000 06:18:43 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2000 16:46:42 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Higaki",
"Susumu",
""
],
[
"Ishibashi",
"Akihiro",
""
],
[
"Ida",
"Daisuke",
""
]
] | The stability of a Nambu-Goto membrane at the equatorial plane of the Reissner-Nordstr{\o}m-de Sitter spacetime is studied. The covariant perturbation formalism is applied to study the behavior of the perturbation of the membrane. The perturbation equation is solved numerically. It is shown that a membrane intersecting... |
2309.06237 | Wenbin Lin | Ya Guo, Hiroaki Nakajima, Wenbin Lin | Teukolsky-like equations in a non-vacuum axisymmetric type D spacetime | The updated version will appear in JCAP | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We study an axisymmetric metric satisfying the Petrov type D property with
some additional ansatze, but without assuming the vacuum condition. We find
that our metric in turn becomes conformal to the Kerr metric deformed by one
function of the radial coordinate. We then study the gravitational-wave
equations on this ... | [
{
"created": "Tue, 12 Sep 2023 13:51:34 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2023 03:10:33 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Jan 2024 12:19:30 GMT",
"version": "v3"
}
] | 2024-01-30 | [
[
"Guo",
"Ya",
""
],
[
"Nakajima",
"Hiroaki",
""
],
[
"Lin",
"Wenbin",
""
]
] | We study an axisymmetric metric satisfying the Petrov type D property with some additional ansatze, but without assuming the vacuum condition. We find that our metric in turn becomes conformal to the Kerr metric deformed by one function of the radial coordinate. We then study the gravitational-wave equations on this ba... |
2102.10541 | Olivier Minazzoli | Olivier Minazzoli and Edison Santos | Charged black hole and radiating solutions in entangled relativity | 6 pages | null | 10.1140/epjc/s10052-021-09441-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we show that the external Schwarzschild metric can be a
good approximation of exact black hole solutions of entangled relativity. Since
entangled relativity cannot be defined from vacuum, the demonstrations need to
rely on the definition of matter fields. The electromagnetic field being the
easies... | [
{
"created": "Sun, 21 Feb 2021 07:56:52 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 2021 13:00:58 GMT",
"version": "v2"
}
] | 2021-08-04 | [
[
"Minazzoli",
"Olivier",
""
],
[
"Santos",
"Edison",
""
]
] | In this manuscript, we show that the external Schwarzschild metric can be a good approximation of exact black hole solutions of entangled relativity. Since entangled relativity cannot be defined from vacuum, the demonstrations need to rely on the definition of matter fields. The electromagnetic field being the easiest ... |
1110.1049 | Gonzalo Olmo | Tiberiu Harko, Tomi S. Koivisto, Francisco S. N. Lobo, and Gonzalo J.
Olmo | Metric-Palatini gravity unifying local constraints and late-time cosmic
acceleration | 5 pages, no figures. Updated to match the published version | Phys. Rev. D 85, 084016 (2012) | 10.1103/PhysRevD.85.084016 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a novel approach to modified theories of gravity that consists of
adding to the Einstein-Hilbert Lagrangian an f(R) term constructed a la
Palatini. Using the respective dynamically equivalent scalar-tensor
representation, we show that the theory can pass the Solar System observational
constraints even if t... | [
{
"created": "Wed, 5 Oct 2011 17:17:12 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Apr 2012 23:13:05 GMT",
"version": "v2"
}
] | 2012-04-26 | [
[
"Harko",
"Tiberiu",
""
],
[
"Koivisto",
"Tomi S.",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Olmo",
"Gonzalo J.",
""
]
] | We present a novel approach to modified theories of gravity that consists of adding to the Einstein-Hilbert Lagrangian an f(R) term constructed a la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we show that the theory can pass the Solar System observational constraints even if the... |
2203.05957 | Changjun Gao | Changjun Gao | How to accomplish inflation and a constant dark energy density | 10 pages, references added | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is commonly assumed that the Lagrangian of multi-field theories of gravity
contains the sum of kinetic terms of scalar fields. However, we propose here
the Lagrangian contains not the sum but the quotient of kinetic terms. With
this novel change, we find the inflationary universe can be acquired with two
scalars w... | [
{
"created": "Thu, 10 Mar 2022 07:05:37 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2022 02:39:52 GMT",
"version": "v2"
}
] | 2022-03-17 | [
[
"Gao",
"Changjun",
""
]
] | It is commonly assumed that the Lagrangian of multi-field theories of gravity contains the sum of kinetic terms of scalar fields. However, we propose here the Lagrangian contains not the sum but the quotient of kinetic terms. With this novel change, we find the inflationary universe can be acquired with two scalars wit... |
gr-qc/0406106 | Daniel A. Shaddock | D. A. Shaddock, B. Ware, R. E. Spero, M. Vallisneri | Post-processed time-delay interferometry for LISA | 14 pages, 6 figures | Phys.Rev. D70 (2004) 081101 | 10.1103/PhysRevD.70.081101 | null | gr-qc | null | High-precision interpolation of LISA phase measurements allows signal
reconstruction and formulation of Time-Delay Interferometry (TDI) combinations
to be conducted in post-processing. The reconstruction is based on phase
measurements made at approximately 10 Hz, at regular intervals independent of
the TDI delay time... | [
{
"created": "Fri, 25 Jun 2004 23:50:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Shaddock",
"D. A.",
""
],
[
"Ware",
"B.",
""
],
[
"Spero",
"R. E.",
""
],
[
"Vallisneri",
"M.",
""
]
] | High-precision interpolation of LISA phase measurements allows signal reconstruction and formulation of Time-Delay Interferometry (TDI) combinations to be conducted in post-processing. The reconstruction is based on phase measurements made at approximately 10 Hz, at regular intervals independent of the TDI delay times.... |
gr-qc/0210043 | Julien Sylvestre | Julien Sylvestre | Time-frequency detection algorithm for gravitational wave bursts | 26 pages, 15 figures, to appear in PRD | Phys.Rev.D66:102004,2002 | 10.1103/PhysRevD.66.102004 | LIGO P020010-00-D | gr-qc | null | An efficient algorithm is presented for the identification of short bursts of
gravitational radiation in the data from broad-band interferometric detectors.
The algorithm consists of three steps: pixels of the time-frequency
representation of the data that have power above a fixed threshold are first
identified. Clus... | [
{
"created": "Mon, 14 Oct 2002 23:12:59 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Sylvestre",
"Julien",
""
]
] | An efficient algorithm is presented for the identification of short bursts of gravitational radiation in the data from broad-band interferometric detectors. The algorithm consists of three steps: pixels of the time-frequency representation of the data that have power above a fixed threshold are first identified. Cluste... |
gr-qc/9304014 | Kevin Eric Cahill | Kevin Cahill | The Fourth Root of Gravity | 5 pages, UNM-frg | null | null | null | gr-qc | null | By attaching basis vectors to the components of matter fields, one may render
free action densities fully covariant. Both the connection and the tetrads are
quadratic forms in these basis vectors. The metric of spacetime, which is
quadratic in the tetrads, is then quartic in the basis vectors.
| [
{
"created": "Mon, 12 Apr 1993 04:14:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cahill",
"Kevin",
""
]
] | By attaching basis vectors to the components of matter fields, one may render free action densities fully covariant. Both the connection and the tetrads are quadratic forms in these basis vectors. The metric of spacetime, which is quadratic in the tetrads, is then quartic in the basis vectors. |
2202.06178 | Bilel Hamil | Bilel Hamil, Houcine Aounallah and Prabir Rudra | Higher order GUP black hole based on COW experiment and Einstein-Bohr's
photon box | null | Eur. Phys. J. Plus 137, 733 (2022) | 10.1140/epjp/s13360-022-02935-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have explored the effects of higher order generalized
uncertainty principle (GUP), inspired from the quantum gravity COW experiment
and the Einstein-Bohr's photon box thought experiment, on the properties of a
black hole. Two different GUP models, namely, GUP to all orders in the Planck
length model, ... | [
{
"created": "Sun, 13 Feb 2022 01:43:51 GMT",
"version": "v1"
}
] | 2023-12-20 | [
[
"Hamil",
"Bilel",
""
],
[
"Aounallah",
"Houcine",
""
],
[
"Rudra",
"Prabir",
""
]
] | In this work we have explored the effects of higher order generalized uncertainty principle (GUP), inspired from the quantum gravity COW experiment and the Einstein-Bohr's photon box thought experiment, on the properties of a black hole. Two different GUP models, namely, GUP to all orders in the Planck length model, an... |
1710.06639 | Bo Wang | Yang Zhang, Fei Qin, Bo Wang | Second-order cosmological perturbations. II. Produced by scalar-tensor
and tensor-tensor couplings | 27 pages, 0 figures. Fix some typos of cited formula number from our
previous work: typos in the paragraphs below eq.(80), below eq.(88), and
below eq.(91). And we make the description above eq.(96) clearer in this
updated version | Phys. Rev. D 96, 103523 (2017) | 10.1103/PhysRevD.96.103523 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the second-order perturbations in the Einstein-de Sitter Universe in
synchronous coordinate. We solve the second-order perturbed Einstein equation
with scalar-tensor, and tensor-tensor couplings between 1st order
perturbations, and obtain, for each coupling, the solutions of scalar, vector,
tensor metric per... | [
{
"created": "Wed, 18 Oct 2017 09:29:02 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Oct 2017 14:21:12 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Nov 2017 07:03:34 GMT",
"version": "v3"
},
{
"created": "Thu, 15 Nov 2018 01:12:40 GMT",
"version": "v4"
},
{
"c... | 2019-02-06 | [
[
"Zhang",
"Yang",
""
],
[
"Qin",
"Fei",
""
],
[
"Wang",
"Bo",
""
]
] | We study the second-order perturbations in the Einstein-de Sitter Universe in synchronous coordinate. We solve the second-order perturbed Einstein equation with scalar-tensor, and tensor-tensor couplings between 1st order perturbations, and obtain, for each coupling, the solutions of scalar, vector, tensor metric pertu... |
1610.01241 | Anzhong Wang | J. Gariel, N.O. Santos, and Anzhong Wang | Observable acceleration of jets by a Kerr black hole | revtex4, two tables and six figures. Some typos are corrected. Gen.
Relativit. Grav. 49 (2017) 43 | Gen. Relativit. Grav. 49 (2017) 43 | 10.1007/s10714-017-2208-9 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of a model based on the gravitational field of the Kerr
black hole, we turn to investigate the kinematic behavior of extragalactic
jets. We analytically calculate the observable velocities and accelerations
along any geodesic. Then, by numerical calculations, we apply our results to a
geodesic, typic... | [
{
"created": "Wed, 5 Oct 2016 00:49:52 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Feb 2017 14:47:03 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Aug 2017 20:31:44 GMT",
"version": "v3"
}
] | 2017-08-28 | [
[
"Gariel",
"J.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"Anzhong",
""
]
] | In the framework of a model based on the gravitational field of the Kerr black hole, we turn to investigate the kinematic behavior of extragalactic jets. We analytically calculate the observable velocities and accelerations along any geodesic. Then, by numerical calculations, we apply our results to a geodesic, typical... |
gr-qc/0101092 | Eanna E. Flanagan | A. Katrin Schenk, Phil Arras, Eanna E. Flanagan, Saul A. Teukolsky,
Ira Wasserman | Nonlinear mode coupling in rotating stars and the r-mode instability in
neutron stars | 62 pages, no figures. Corrected error in computation of coupling
coefficients, added new selection rule and an appendix on energy and angular
momentum of modes | Phys.Rev. D65 (2002) 024001 | 10.1103/PhysRevD.65.024001 | null | gr-qc astro-ph | null | We develop the formalism required to study the nonlinear interaction of modes
in rotating Newtonian stars in the weakly nonlinear regime. The formalism
simplifies and extends previous treatments. At linear order, we elucidate and
extend slightly a formalism due to Schutz, show how to decompose a general
motion of a r... | [
{
"created": "Tue, 23 Jan 2001 23:57:44 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jan 2001 15:57:03 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Jul 2001 01:45:02 GMT",
"version": "v3"
},
{
"created": "Wed, 11 Jul 2001 21:01:54 GMT",
"version": "v4"
}
] | 2016-08-31 | [
[
"Schenk",
"A. Katrin",
""
],
[
"Arras",
"Phil",
""
],
[
"Flanagan",
"Eanna E.",
""
],
[
"Teukolsky",
"Saul A.",
""
],
[
"Wasserman",
"Ira",
""
]
] | We develop the formalism required to study the nonlinear interaction of modes in rotating Newtonian stars in the weakly nonlinear regime. The formalism simplifies and extends previous treatments. At linear order, we elucidate and extend slightly a formalism due to Schutz, show how to decompose a general motion of a rot... |
2105.13992 | Marco Crisostomi | Miguel Bezares, Lotte ter Haar, Marco Crisostomi, Enrico Barausse,
Carlos Palenzuela | Kinetic screening in nonlinear stellar oscillations and gravitational
collapse | 17 pages, 11 figures. Minor changes, matches version published in PRD | Phys. Rev. D 104, 044022 (2021) | 10.1103/PhysRevD.104.044022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider k-essence, a scalar-tensor theory with first-order derivative
self-interactions that can screen local scales from scalar fifth forces, while
allowing for sizeable deviations from General Relativity on cosmological
scales. We construct fully nonlinear static stellar solutions that show the
presence of this... | [
{
"created": "Fri, 28 May 2021 17:20:02 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Aug 2021 15:35:37 GMT",
"version": "v2"
}
] | 2021-08-13 | [
[
"Bezares",
"Miguel",
""
],
[
"ter Haar",
"Lotte",
""
],
[
"Crisostomi",
"Marco",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | We consider k-essence, a scalar-tensor theory with first-order derivative self-interactions that can screen local scales from scalar fifth forces, while allowing for sizeable deviations from General Relativity on cosmological scales. We construct fully nonlinear static stellar solutions that show the presence of this s... |
1610.02128 | Changqing Liu Lcqliu | Changqing Liu, Chikun Ding, Jiliang Jing | Effects of Homogeneous Plasma on Strong Gravitational Lensing of Kerr
Black Holes | 14 page ,4 figure. arXiv admin note: substantial text overlap with
arXiv:1208.1072 | Chin. Phys. Lett. 34(9),090401 (2017) | 10.1088/0256-307X/34/9/090401 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Considering a Kerr black hole surrounded by the homogenous unmagnetised
plasma medium, we study the strong gravitational lensing on the equatorial
plane of the Kerr black hole. We find that the presence of the uniform plasma
increases the photon-sphere radius $r_{ps}$, the coefficient $\bar{a},\bar{b}$,
the angular p... | [
{
"created": "Fri, 7 Oct 2016 03:08:29 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Dec 2016 09:43:52 GMT",
"version": "v2"
}
] | 2017-10-11 | [
[
"Liu",
"Changqing",
""
],
[
"Ding",
"Chikun",
""
],
[
"Jing",
"Jiliang",
""
]
] | Considering a Kerr black hole surrounded by the homogenous unmagnetised plasma medium, we study the strong gravitational lensing on the equatorial plane of the Kerr black hole. We find that the presence of the uniform plasma increases the photon-sphere radius $r_{ps}$, the coefficient $\bar{a},\bar{b}$, the angular pos... |
2205.09610 | Valentin Boyanov | Valentin Boyanov | Way down in the hole... and up again | 16 pages, 2 figures; Essay received Honorable Mention at the Gravity
Research Foundation 2022 Awards for Essays on Gravitation | null | 10.1142/S0218271822420111 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | I argue that an approach which uses an appropriate admixture of both
classical and semiclassical effects is essential for understanding the ultimate
fate of gravitational collapse and the nature of black holes. I provide an
example of a problem which pushes the boundaries of what is known in both the
classical and se... | [
{
"created": "Thu, 19 May 2022 15:03:13 GMT",
"version": "v1"
}
] | 2022-11-01 | [
[
"Boyanov",
"Valentin",
""
]
] | I argue that an approach which uses an appropriate admixture of both classical and semiclassical effects is essential for understanding the ultimate fate of gravitational collapse and the nature of black holes. I provide an example of a problem which pushes the boundaries of what is known in both the classical and semi... |
1205.6738 | Ricardo Paszko | Ricardo Paszko | Introduction to Quantum Gravity | Invited talk held at UNESP, Guaratingueta, 11/23/2011 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk, we give a glimpse of the problems with quantum gravity and some
possible solutions.
| [
{
"created": "Wed, 30 May 2012 16:00:37 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Sep 2013 14:11:10 GMT",
"version": "v2"
}
] | 2013-09-05 | [
[
"Paszko",
"Ricardo",
""
]
] | In this talk, we give a glimpse of the problems with quantum gravity and some possible solutions. |
1706.07470 | Marco Toller | Marco Toller | A Theory of Gravitation Covariant under $Sp(4, \mathbf{R})$} | 45 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a Lagrangian theory of gravitation that develops some ideas
proposed several years ago. It is formulated on the 10-dimensional space
$\mathcal{S}$ of the local Lorentz frames (tetrads) and it is covariant under
the symplectic group $Sp(4, \mathbf{R})$, locally isomorphyic to the anti-de
Sitter group $SO(2,... | [
{
"created": "Thu, 22 Jun 2017 19:38:14 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2017 21:28:09 GMT",
"version": "v2"
}
] | 2017-09-19 | [
[
"Toller",
"Marco",
""
]
] | We present a Lagrangian theory of gravitation that develops some ideas proposed several years ago. It is formulated on the 10-dimensional space $\mathcal{S}$ of the local Lorentz frames (tetrads) and it is covariant under the symplectic group $Sp(4, \mathbf{R})$, locally isomorphyic to the anti-de Sitter group $SO(2, 3... |
1011.1357 | James Clark PhD | The LIGO Scientific Collaboration: J. Abadie, B. P. Abbott, R. Abbott,
R. Adhikari, P. Ajith, B. Allen, G. Allen, E. Amador Ceron, R. S. Amin, S. B.
Anderson, W. G. Anderson, M. A. Arain, M. Araya, Y. Aso, S. Aston, P.
Aufmuth, C. Aulbert, S. Babak, P. Baker, S. Ballmer, D. Barker, B. Barr, P.
Barriga, L. Barso... | A search for gravitational waves associated with the August 2006 timing
glitch of the Vela pulsar | 13 pages, 5 figures | Phys.Rev.D83:042001,2011; Publisher-note D83:069902,2011;
Phys.Rev.D83:069902,2011 | 10.1103/PhysRevD.83.042001 10.1103/PhysRevD.83.069902 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The physical mechanisms responsible for pulsar timing glitches are thought to
excite quasi-normal mode oscillations in their parent neutron star that couple
to gravitational wave emission. In August 2006, a timing glitch was observed in
the radio emission of PSR B0833-45, the Vela pulsar. At the time of the glitch,
t... | [
{
"created": "Fri, 5 Nov 2010 10:27:01 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Nov 2010 18:36:37 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Nov 2010 18:16:21 GMT",
"version": "v3"
}
] | 2011-05-12 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Adhikari",
"R.",
""
],
[
"Ajith",
"P.",
""
],
[
"Allen",
"B.",
""
],
[
"A... | The physical mechanisms responsible for pulsar timing glitches are thought to excite quasi-normal mode oscillations in their parent neutron star that couple to gravitational wave emission. In August 2006, a timing glitch was observed in the radio emission of PSR B0833-45, the Vela pulsar. At the time of the glitch, the... |
2004.09650 | Piero Nicolini | Patricio Gaete, Piero Nicolini and Euro Spallucci | Regularization ambiguity and van der Waals black hole in 2+1 dimensions | 18 pages, 3 figures, version published on EJPC | Eur.Phys.J. C81 (2021) no.6, 526 | 10.1140/epjc/s10052-021-09301-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Charged black holes in a ($2+1$)-dimensional anti-de Sitter space-time suffer
from some limitations such as the ambiguity in the definition of the mass and
the bad short distance behavior. In this paper we present a way to resolve such
issues. By extending the parameter space of the BTZ geometry, we properly
identify... | [
{
"created": "Mon, 20 Apr 2020 21:40:46 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jun 2021 08:21:17 GMT",
"version": "v2"
}
] | 2021-06-24 | [
[
"Gaete",
"Patricio",
""
],
[
"Nicolini",
"Piero",
""
],
[
"Spallucci",
"Euro",
""
]
] | Charged black holes in a ($2+1$)-dimensional anti-de Sitter space-time suffer from some limitations such as the ambiguity in the definition of the mass and the bad short distance behavior. In this paper we present a way to resolve such issues. By extending the parameter space of the BTZ geometry, we properly identify t... |
gr-qc/9711078 | Mark A. Scheel | The Binary Black Hole Grand Challenge Alliance: G. B. Cook, M. F. Huq,
S. A. Klasky, M. A. Scheel, A. M. Abrahams, A. Anderson, P. Anninos, T. W.
Baumgarte, N. T. Bishop, S. R. Brandt, J. C. Browne, K. Camarda, M. W.
Choptuik, C. R. Evans, L. S. Finn, G. C. Fox, R. Gomez, T. Haupt, L. E.
Kidder, P. Laguna, W. L... | Boosted three-dimensional black-hole evolutions with singularity
excision | null | Phys.Rev.lett.80:2512-2516,1998 | 10.1103/PhysRevLett.80.2512 | null | gr-qc | null | Binary black hole interactions provide potentially the strongest source of
gravitational radiation for detectors currently under development. We present
some results from the Binary Black Hole Grand Challenge Alliance three-
dimensional Cauchy evolution module. These constitute essential steps towards
modeling such i... | [
{
"created": "Wed, 26 Nov 1997 14:50:25 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Alliance",
"The Binary Black Hole Grand Challenge",
""
],
[
":",
"",
""
],
[
"Cook",
"G. B.",
""
],
[
"Huq",
"M. F.",
""
],
[
"Klasky",
"S. A.",
""
],
[
"Scheel",
"M. A.",
""
],
[
"Abrahams",
"A. M.",
""
... | Binary black hole interactions provide potentially the strongest source of gravitational radiation for detectors currently under development. We present some results from the Binary Black Hole Grand Challenge Alliance three- dimensional Cauchy evolution module. These constitute essential steps towards modeling such int... |
gr-qc/0701111 | Baojiu Li | Baojiu Li, John D. Barrow | The Cosmology of f(R) Gravity in the Metric Variational Approach | 13 pages, 8 figures. References, comments and acknowledgements added,
typos corrected, one paragraph added, title slightly modified; version
accepted for publication in Physical Review D | Phys.Rev.D75:084010,2007 | 10.1103/PhysRevD.75.084010 | null | gr-qc astro-ph | null | We consider the cosmologies that arise in a subclass of f(R) gravity with
f(R)=R+\mu ^{2n+2}/(-R)^{n} and -1<n<0 in the metric (as opposed to the
Palatini) variational approach to deriving the gravitational field equations.
The calculations of the isotropic and homogeneous cosmological models are
undertaken in the Jo... | [
{
"created": "Fri, 19 Jan 2007 21:12:48 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Mar 2007 19:37:00 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Li",
"Baojiu",
""
],
[
"Barrow",
"John D.",
""
]
] | We consider the cosmologies that arise in a subclass of f(R) gravity with f(R)=R+\mu ^{2n+2}/(-R)^{n} and -1<n<0 in the metric (as opposed to the Palatini) variational approach to deriving the gravitational field equations. The calculations of the isotropic and homogeneous cosmological models are undertaken in the Jord... |
gr-qc/0104059 | Patrice Hello | P. Hello | Compensation for thermal effects in mirrors of Gravitational Wave
Interferometers | 20 pages, 12 figures | Eur.Phys.J.D15:373-383,2001 | 10.1007/s100530170154 | null | gr-qc | null | In this paper we study several means of compensating for thermal lensing
which, otherwise, should be a source of concern for future upgrades of
interferometric detectors of gravitational waves. The methods we develop are
based on the principle of heating the cold parts of the mirrors. We find that
thermal compensatio... | [
{
"created": "Wed, 18 Apr 2001 13:56:51 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Hello",
"P.",
""
]
] | In this paper we study several means of compensating for thermal lensing which, otherwise, should be a source of concern for future upgrades of interferometric detectors of gravitational waves. The methods we develop are based on the principle of heating the cold parts of the mirrors. We find that thermal compensation ... |
gr-qc/0501099 | Vicente Jos\'e Bol\'os | V. J. Bol\'os | Stability between foliations in general relativity | 11 pages, 1 figure added | Gen.Rel.Grav. 39 (2007) 9-21 | 10.1007/s10714-006-0362-6 | null | gr-qc | null | The aim of this paper is to study foliations that remain invariant by
parallel transports along the integral curves of vector fields of another
foliations. According to this idea, we define a new concept of stability
between foliations. A particular case of stability (called regular stability)
is studied, giving a us... | [
{
"created": "Mon, 31 Jan 2005 09:46:59 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2005 09:48:07 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Bolós",
"V. J.",
""
]
] | The aim of this paper is to study foliations that remain invariant by parallel transports along the integral curves of vector fields of another foliations. According to this idea, we define a new concept of stability between foliations. A particular case of stability (called regular stability) is studied, giving a usef... |
1602.04782 | Alan Kostelecky | Alan Kostelecky and Matthew Mewes | Testing local Lorentz invariance with gravitational waves | 12 pages | Phys. Lett. B757:510-514, 2016 | 10.1016/j.physletb.2016.04.040 | IUHET 611 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of local Lorentz violation on dispersion and birefringence of
gravitational waves are investigated. The covariant dispersion relation for
gravitational waves involving gauge-invariant Lorentz-violating operators of
arbitrary mass dimension is constructed. The chirp signal from the
gravitational-wave event... | [
{
"created": "Mon, 15 Feb 2016 19:59:27 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"Kostelecky",
"Alan",
""
],
[
"Mewes",
"Matthew",
""
]
] | The effects of local Lorentz violation on dispersion and birefringence of gravitational waves are investigated. The covariant dispersion relation for gravitational waves involving gauge-invariant Lorentz-violating operators of arbitrary mass dimension is constructed. The chirp signal from the gravitational-wave event G... |
1707.04637 | Salvatore Vitale | Salvatore Vitale, Davide Gerosa, Carl-Johan Haster, Katerina
Chatziioannou, Aaron Zimmerman | Impact of Bayesian prior on the characterization of binary black hole
coalescences | 6 Pages, 2 Figures; see also 1712.06635 Data release at
https://github.com/vitale82/GWpriors | Phys. Rev. Lett. 119, 251103 (2017) | 10.1103/PhysRevLett.119.251103 | LIGO P1700176 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a regime where data are only mildly informative, prior choices can play a
significant role in Bayesian statistical inference, potentially affecting the
inferred physics. We show this is indeed the case for some of the parameters
inferred from current gravitational-wave measurements of binary black hole
coalescence... | [
{
"created": "Fri, 14 Jul 2017 20:55:28 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2018 15:17:32 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Jul 2018 00:34:16 GMT",
"version": "v3"
}
] | 2018-07-19 | [
[
"Vitale",
"Salvatore",
""
],
[
"Gerosa",
"Davide",
""
],
[
"Haster",
"Carl-Johan",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Zimmerman",
"Aaron",
""
]
] | In a regime where data are only mildly informative, prior choices can play a significant role in Bayesian statistical inference, potentially affecting the inferred physics. We show this is indeed the case for some of the parameters inferred from current gravitational-wave measurements of binary black hole coalescences.... |
1606.07600 | Leonardo Fernandez-Jambrina | L. Fernandez-Jambrina | Initial directional singularity in inflationary models | RevTeX, 11 pages, typos corrected | Physical Review D 94, 024049 (2016) | 10.1103/PhysRevD.94.024049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In [1] a new cosmological model is proposed with no big bang singularity in
the past, though past geodesically incomplete. This model starts with an
inflationary era, follows with a stiff matter dominated period and evolves to
accelerated expansion in an asymptotically de Sitter regime in a realistic
fashion. The big... | [
{
"created": "Fri, 24 Jun 2016 08:33:24 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2016 11:58:47 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Jul 2016 08:27:17 GMT",
"version": "v3"
}
] | 2016-08-09 | [
[
"Fernandez-Jambrina",
"L.",
""
]
] | In [1] a new cosmological model is proposed with no big bang singularity in the past, though past geodesically incomplete. This model starts with an inflationary era, follows with a stiff matter dominated period and evolves to accelerated expansion in an asymptotically de Sitter regime in a realistic fashion. The big b... |
0801.3163 | Ingemar Bengtsson | Stefan Aminneborg, Ingemar Bengtsson | Anti-de Sitter Quotients: When Are They Black Holes? | 16 pages, 4 figures; minor polish added | Class.Quant.Grav.25:095019,2008 | 10.1088/0264-9381/25/9/095019 | null | gr-qc hep-th | null | We point out that the BTZ black holes, and their relatives, can be defined in
a cleaner way than they originally were. The covering space can be taken to be
anti-de Sitter space, period, while scri splits up into components due to
Misner singularities. Our definition permits us to choose between two
conflicting claim... | [
{
"created": "Mon, 21 Jan 2008 10:26:55 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Apr 2008 08:19:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Aminneborg",
"Stefan",
""
],
[
"Bengtsson",
"Ingemar",
""
]
] | We point out that the BTZ black holes, and their relatives, can be defined in a cleaner way than they originally were. The covering space can be taken to be anti-de Sitter space, period, while scri splits up into components due to Misner singularities. Our definition permits us to choose between two conflicting claims ... |
0801.2307 | James Shifflett | J. A. Shifflett | A modification of Einstein-Schrodinger theory that contains both general
relativity and electrodynamics | fixed 2 references, accepted by "General Relativity and Gravitation" | Gen.Rel.Grav.40:1745-1769,2008 | 10.1007/s10714-007-0572-6 | null | gr-qc | null | We modify the Einstein-Schrodinger theory to include a cosmological constant
$\Lambda_z$ which multiplies the symmetric metric, and we show how the theory
can be easily coupled to additional fields. The cosmological constant
$\Lambda_z$ is assumed to be nearly cancelled by Schrodinger's cosmological
constant $\Lambda... | [
{
"created": "Tue, 15 Jan 2008 14:27:59 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Feb 2008 18:28:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Shifflett",
"J. A.",
""
]
] | We modify the Einstein-Schrodinger theory to include a cosmological constant $\Lambda_z$ which multiplies the symmetric metric, and we show how the theory can be easily coupled to additional fields. The cosmological constant $\Lambda_z$ is assumed to be nearly cancelled by Schrodinger's cosmological constant $\Lambda_b... |
1305.1214 | Daniela Pugliese Dr | D. Pugliese, G. Montani | Astrophysical evidence for an extra dimension: phenomenology of a Kaluza
Klein theory | 22 pages, 5 figures. This is a revised version to meet the published
article. To appear in MPLA | null | 10.1142/S0217732313300139 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief review we discuss the viability of a multidimensional
geometrical theory with one compactified dimension. We discuss the case of a
Kaluza Klein fifth dimensional theory, addressing the problem by an overview of
the astrophysical phenomenology associated with this five dimensional theory.
By comparing th... | [
{
"created": "Mon, 6 May 2013 14:45:02 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 2013 14:32:00 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Pugliese",
"D.",
""
],
[
"Montani",
"G.",
""
]
] | In this brief review we discuss the viability of a multidimensional geometrical theory with one compactified dimension. We discuss the case of a Kaluza Klein fifth dimensional theory, addressing the problem by an overview of the astrophysical phenomenology associated with this five dimensional theory. By comparing the ... |
1910.12811 | Mohsen Fathi | Mohsen Fathi, Marco Olivares, J.R. Villanueva | Classical tests on a charged Weyl black hole: bending of light, Shapiro
delay and Sagnac effect | 14 pages, 11 figures | Eur. Phys. J. C 80: 51 (2020) | 10.1140/epjc/s10052-020-7623-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we apply the classical test of general relativity on a charged
Weyl black hole, whose exterior geometry is defined by altering the spherically
symmetric solutions of Weyl conformal theory of gravity. The tests are
basically founded on scrutinizing the angular geodesics of light rays
propagating in the ... | [
{
"created": "Mon, 28 Oct 2019 17:10:36 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jan 2020 16:31:11 GMT",
"version": "v2"
}
] | 2020-01-24 | [
[
"Fathi",
"Mohsen",
""
],
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"J. R.",
""
]
] | In this paper, we apply the classical test of general relativity on a charged Weyl black hole, whose exterior geometry is defined by altering the spherically symmetric solutions of Weyl conformal theory of gravity. The tests are basically founded on scrutinizing the angular geodesics of light rays propagating in the gr... |
2002.04280 | Kirill Kobialko | K. V. Kobialko and D. V. Gal'tsov | Photon regions and umbilic conditions in stationary axisymmetric
spacetimes | null | Eur. Phys. J. C 80, 527 (2020) | 10.1140/epjc/s10052-020-8070-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Photon region (PR) in the strong gravitational field is defined as a compact
region where photons can travel endlessly without going to infinity or
disappearing at the event horizon. In Schwarzschild metric PR degenerates to
the two-dimensional photon sphere $r=3r_g/2$ where closed circular photon
orbits are located.... | [
{
"created": "Tue, 11 Feb 2020 09:51:49 GMT",
"version": "v1"
}
] | 2020-06-15 | [
[
"Kobialko",
"K. V.",
""
],
[
"Gal'tsov",
"D. V.",
""
]
] | Photon region (PR) in the strong gravitational field is defined as a compact region where photons can travel endlessly without going to infinity or disappearing at the event horizon. In Schwarzschild metric PR degenerates to the two-dimensional photon sphere $r=3r_g/2$ where closed circular photon orbits are located. T... |
0903.4540 | Orfeu Bertolami | Orfeu Bertolami, Miguel Carvalho Sequeira | Energy Conditions and Stability in $f(R)$ theories of gravity with
non-minimal coupling to matter | 12 pages, 2 tables. Version to match the one to appear in Physical
Review D | Phys.Rev.D79:104010,2009 | 10.1103/PhysRevD.79.104010 | DF/IST-2-2009 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, in the context of $f(R)$ modified theories of gravity, a new type
of model has been proposed where one directly couples the scalar curvature to
matter. As any model in $f(R)$ theory, there are certain conditions which have
to be satisfy in order to ensure that the model is viable and physically
meaningful. ... | [
{
"created": "Thu, 26 Mar 2009 09:59:03 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2009 08:19:15 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Sequeira",
"Miguel Carvalho",
""
]
] | Recently, in the context of $f(R)$ modified theories of gravity, a new type of model has been proposed where one directly couples the scalar curvature to matter. As any model in $f(R)$ theory, there are certain conditions which have to be satisfy in order to ensure that the model is viable and physically meaningful. In... |
1603.00028 | Rajeev Kumar Jain | Alessandro Codello and Rajeev Kumar Jain | A Unified Universe | v1: 6 pages, 3 figures; v2: references added and minor corrections;
v3: minor corrections, version published in EPJC | Eur. Phys. J. C (2018) 78, 357 | 10.1140/epjc/s10052-018-5839-4 | CP3-Origins-2016-009 DNRF90 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a unified evolution of the universe from very early times until
the present epoch by including both the leading local correction $R^2$ and the
leading non-local term $R\frac{1}{\square^2}R$ to the classical gravitational
action. We find that the inflationary phase driven by $R^2$ term gracefully
exits in a... | [
{
"created": "Mon, 29 Feb 2016 21:00:05 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Mar 2016 17:20:13 GMT",
"version": "v2"
},
{
"created": "Tue, 8 May 2018 10:13:17 GMT",
"version": "v3"
}
] | 2018-05-09 | [
[
"Codello",
"Alessandro",
""
],
[
"Jain",
"Rajeev Kumar",
""
]
] | We present a unified evolution of the universe from very early times until the present epoch by including both the leading local correction $R^2$ and the leading non-local term $R\frac{1}{\square^2}R$ to the classical gravitational action. We find that the inflationary phase driven by $R^2$ term gracefully exits in a t... |
1101.4775 | Sebastian Steinhaus | Benjamin Bahr, Bianca Dittrich, Sebastian Steinhaus | Perfect discretization of reparametrization invariant path integrals | 22+8 pages | Phys.Rev.D83:105026,2011 | 10.1103/PhysRevD.83.105026 | null | gr-qc hep-lat | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To obtain a well defined path integral one often employs discretizations. In
the case of gravity and reparametrization invariant systems, the latter of
which we consider here as a toy example, discretizations generically break
diffeomorphism and reparametrization symmetry, respectively. This has severe
implications, ... | [
{
"created": "Tue, 25 Jan 2011 11:26:48 GMT",
"version": "v1"
}
] | 2011-06-07 | [
[
"Bahr",
"Benjamin",
""
],
[
"Dittrich",
"Bianca",
""
],
[
"Steinhaus",
"Sebastian",
""
]
] | To obtain a well defined path integral one often employs discretizations. In the case of gravity and reparametrization invariant systems, the latter of which we consider here as a toy example, discretizations generically break diffeomorphism and reparametrization symmetry, respectively. This has severe implications, as... |
1801.08996 | Jean-Philippe Nicolas | Jean-Philippe Nicolas, Truong Xuan Pham | Peeling on Kerr spacetime~:linear and non linear scalar fields | 51 pages | null | 10.1007/s00023-019-00832-0 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the peeling on Kerr spacetime for fields satisfying conformally
invariant linear and nonlinear scalar wave equations. We follow an approach
initiated by L.J. Mason and the first author for the Schwarzschild metric,
based on a Penrose compactification and energy estimates. This approach
provides a definition ... | [
{
"created": "Fri, 26 Jan 2018 22:28:49 GMT",
"version": "v1"
}
] | 2019-10-23 | [
[
"Nicolas",
"Jean-Philippe",
""
],
[
"Pham",
"Truong Xuan",
""
]
] | We study the peeling on Kerr spacetime for fields satisfying conformally invariant linear and nonlinear scalar wave equations. We follow an approach initiated by L.J. Mason and the first author for the Schwarzschild metric, based on a Penrose compactification and energy estimates. This approach provides a definition of... |
0901.4931 | Simon Chelkowski | Simon Chelkowski, Stefan Hild, and Andreas Freise | Prospects of higher-order Laguerre Gauss modes in future gravitational
wave detectors | 12 pages, 8 figures | Phys.Rev.D79:122002,2009 | 10.1103/PhysRevD.79.122002 | LIGO- P0900006-v1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The application of higher-order Laguerre Gauss (LG) modes in large-scale
gravitational wave detectors has recently been proposed. In comparison to the
fundamental mode, some higher-order Laguerre Gauss modes can significantly
reduce the contribution of coating Brownian noise. Using frequency domain
simulations we giv... | [
{
"created": "Fri, 30 Jan 2009 17:01:06 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jun 2009 09:01:25 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Chelkowski",
"Simon",
""
],
[
"Hild",
"Stefan",
""
],
[
"Freise",
"Andreas",
""
]
] | The application of higher-order Laguerre Gauss (LG) modes in large-scale gravitational wave detectors has recently been proposed. In comparison to the fundamental mode, some higher-order Laguerre Gauss modes can significantly reduce the contribution of coating Brownian noise. Using frequency domain simulations we give ... |
2002.03111 | Hosein Ramezani Aval | H. Ramezani-Aval | Comment on "On the general relativistic framework of the Sagnac effect"
EPJC 79:187 | null | Eur. Phys. J. Plus (2020) 135:234 | 10.1140/epjp/s13360-020-00246-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper EPJC 79:187 the general relativistic framework of the
Sagnac effect was investigated. We have some comments on this paper. We show
that their conclusion about the apparent variation of the speed of light does
not hold in stationary spacetimes. Also, We show that their definition of
gravitational Cor... | [
{
"created": "Sat, 8 Feb 2020 08:15:11 GMT",
"version": "v1"
}
] | 2020-02-11 | [
[
"Ramezani-Aval",
"H.",
""
]
] | In a recent paper EPJC 79:187 the general relativistic framework of the Sagnac effect was investigated. We have some comments on this paper. We show that their conclusion about the apparent variation of the speed of light does not hold in stationary spacetimes. Also, We show that their definition of gravitational Corio... |
2405.11279 | Wen-Biao Han | Jian-Dong Liu, Wen-Biao Han, Qianyun Yun and Shu-Cheng Yang | The Effect of Higher Harmonics On Gravitational Wave Dark Sirens | 14 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational wave (GW) signal from the merger of two black holes can
serve as a standard sirens for cosmological inference. However, a degeneracy
exists between the luminosity distance and the inclination angle between the
binary system's orbital angular momentum and the observer's line of sight,
limiting the pr... | [
{
"created": "Sat, 18 May 2024 12:31:34 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Liu",
"Jian-Dong",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Yun",
"Qianyun",
""
],
[
"Yang",
"Shu-Cheng",
""
]
] | The gravitational wave (GW) signal from the merger of two black holes can serve as a standard sirens for cosmological inference. However, a degeneracy exists between the luminosity distance and the inclination angle between the binary system's orbital angular momentum and the observer's line of sight, limiting the prec... |
1911.05130 | Andrea Giusti | Andrea Giusti, Valerio Faraoni | Turnaround physics beyond spherical symmetry | 15 pages, no figures, updated to match the published version | Phys. Rev. D 103, 044049 (2021) | 10.1103/PhysRevD.103.044049 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concept of turnaround surface in an accelerating universe is generalized
to arbitrarily large deviations from spherical symmetry, to close the gap
between the idealized theoretical literature and the real world observed by
astronomers. As an analytical application, the characterization of turnaround
surface is ap... | [
{
"created": "Tue, 12 Nov 2019 20:32:30 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Feb 2021 16:04:43 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Giusti",
"Andrea",
""
],
[
"Faraoni",
"Valerio",
""
]
] | The concept of turnaround surface in an accelerating universe is generalized to arbitrarily large deviations from spherical symmetry, to close the gap between the idealized theoretical literature and the real world observed by astronomers. As an analytical application, the characterization of turnaround surface is appl... |
2406.15127 | Igor Bogush Dr. | Kirill Kobialko, Igor Bogush, Dmitri Gal'tsov | Uniqueness of the static vacuum asymptotically flat spacetimes with
massive particle spheres | 14 pages, revtex4-1 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we establish that a four-dimensional static vacuum
asymptotically flat spacetime containing a massive particle sphere is isometric
to the Schwarzschild spacetime. Our results expand upon existing uniqueness
theorems for static vacuum asymptotically flat spacetimes, which focus on
scenarios featuring ev... | [
{
"created": "Fri, 21 Jun 2024 13:21:22 GMT",
"version": "v1"
}
] | 2024-06-24 | [
[
"Kobialko",
"Kirill",
""
],
[
"Bogush",
"Igor",
""
],
[
"Gal'tsov",
"Dmitri",
""
]
] | In this paper, we establish that a four-dimensional static vacuum asymptotically flat spacetime containing a massive particle sphere is isometric to the Schwarzschild spacetime. Our results expand upon existing uniqueness theorems for static vacuum asymptotically flat spacetimes, which focus on scenarios featuring even... |
2102.03152 | Edgardo Franzin | Edgardo Franzin, Stefano Liberati and Mauro Oi | Superradiance in Kerr-like black holes | 10+ pages, 6 figures, data available at
https://github.com/efranzin/SuperradianceKZ Minor corrections, accepted in
PRD | Phys. Rev. D 103, 104034 (2021) | 10.1103/PhysRevD.103.104034 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent strong-field regime tests of gravity are so far in agreement with
general relativity. In particular, astrophysical black holes appear all to be
consistent with the Kerr spacetime, but the statistical error on current
observations allows for small yet detectable deviations from this description.
Here we study s... | [
{
"created": "Fri, 5 Feb 2021 13:06:58 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Apr 2021 12:01:23 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Franzin",
"Edgardo",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Oi",
"Mauro",
""
]
] | Recent strong-field regime tests of gravity are so far in agreement with general relativity. In particular, astrophysical black holes appear all to be consistent with the Kerr spacetime, but the statistical error on current observations allows for small yet detectable deviations from this description. Here we study sup... |
1410.3152 | Yerko V\'asquez | J. Lorca Espiro and Yerko V\'asquez | Some cosmological models coming from gravitational theories having
torsional degrees of freedom | Accepted for publication in GERG | null | 10.1007/s10714-016-2113-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we consider gravitational theories in which the effect of
coupling characteristic classes, appropriately introduced as operators in the
Einstein-Hilbert action, has been taken into account. As it is well known, this
approach strays from the framework of general relativity since it results in
theories in ... | [
{
"created": "Sun, 12 Oct 2014 21:08:36 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Oct 2014 01:26:01 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Dec 2015 00:46:13 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Feb 2016 20:56:42 GMT",
"version": "v4"
},
{
"cr... | 2016-07-29 | [
[
"Espiro",
"J. Lorca",
""
],
[
"Vásquez",
"Yerko",
""
]
] | In this work we consider gravitational theories in which the effect of coupling characteristic classes, appropriately introduced as operators in the Einstein-Hilbert action, has been taken into account. As it is well known, this approach strays from the framework of general relativity since it results in theories in wh... |
1308.3206 | Vladimir Folomeev | Vladimir Folomeev and Vladimir Dzhunushaliev | Wormhole solutions supported by interacting dark matter and dark energy | 13 pages, 3 figures, minor corrections to content, new figure and
reference added, version published in PRD. arXiv admin note: text overlap
with arXiv:1305.1087 | Phys. Rev. D 89, 064002 (2014) | 10.1103/PhysRevD.89.064002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the presence of a nonminimal interaction between dark matter and
dark energy may lead to a violation of the null energy condition and to the
formation of a configuration with nontrivial topology (a wormhole). In this it
is assumed that both dark matter and dark energy satisfy the null energy
condition, a... | [
{
"created": "Tue, 13 Aug 2013 08:08:07 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Mar 2014 09:56:58 GMT",
"version": "v2"
}
] | 2014-03-11 | [
[
"Folomeev",
"Vladimir",
""
],
[
"Dzhunushaliev",
"Vladimir",
""
]
] | We show that the presence of a nonminimal interaction between dark matter and dark energy may lead to a violation of the null energy condition and to the formation of a configuration with nontrivial topology (a wormhole). In this it is assumed that both dark matter and dark energy satisfy the null energy condition, a v... |
gr-qc/9912119 | Robert M. Wald | Robert M. Wald | The Thermodynamics of Black Holes | 46 pages, no figures, plain latex file; submitted to Living Reviews
in Relativity. Revised version contains numerous minor changes | LivingRev.Rel.4:6,2001 | 10.12942/lrr-2001-6 | null | gr-qc hep-th | null | We review the present status of black hole thermodynamics. Our review
includes discussion of classical black hole thermodynamics, Hawking radiation
from black holes, the generalized second law, and the issue of entropy bounds.
A brief survey also is given of approaches to the calculation of black hole
entropy. We con... | [
{
"created": "Fri, 31 Dec 1999 00:05:33 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Sep 2000 17:42:16 GMT",
"version": "v2"
}
] | 2016-04-27 | [
[
"Wald",
"Robert M.",
""
]
] | We review the present status of black hole thermodynamics. Our review includes discussion of classical black hole thermodynamics, Hawking radiation from black holes, the generalized second law, and the issue of entropy bounds. A brief survey also is given of approaches to the calculation of black hole entropy. We concl... |
1502.00893 | Mitchell Revalski | Mitchell Revalski, Will Rhodes and Thulsi Wickramasinghe | The Emission of Electromagnetic Radiation from Charges Accelerated by
Gravitational Waves and its Astrophysical Implications | Appears in Gravitational Wave Astrophysics, Editor C.F. Sopuerta,
Astrophysics and Space Science Proceedings, Volume 40. ISBN
978-3-319-10487-4. Springer International Publishing Switzerland, 2015, p.
301 | Astrophysics and Space Science Proceedings, 40, 301 (2015) | 10.1007/978-3-319-10488-1_27 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide calculations and theoretical arguments supporting the emission of
electromagnetic radiation from charged particles accelerated by gravitational
waves (GWs). These waves have significant indirect evidence to support their
existence, yet they interact weakly with ordinary matter. We show that the
induced osc... | [
{
"created": "Tue, 3 Feb 2015 15:37:09 GMT",
"version": "v1"
}
] | 2015-02-04 | [
[
"Revalski",
"Mitchell",
""
],
[
"Rhodes",
"Will",
""
],
[
"Wickramasinghe",
"Thulsi",
""
]
] | We provide calculations and theoretical arguments supporting the emission of electromagnetic radiation from charged particles accelerated by gravitational waves (GWs). These waves have significant indirect evidence to support their existence, yet they interact weakly with ordinary matter. We show that the induced oscil... |
2401.05099 | Jibril Ben Achour | Jibril Ben Achour, Mohammad Ali Gorji, Hugo Roussille | Nonlinear gravitational waves in Horndeski gravity: Scalar pulse and
memories | 31 pages, 9 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present and analyze a new non-perturbative radiative solution of Horndeski
gravity. This exact solution is constructed by a disformal mapping of a seed
solution of the shift-symmetric Einstein-Scalar system belonging to the
Robinson-Trautman geometry describing the gravitational radiation emitted by a
time-depende... | [
{
"created": "Wed, 10 Jan 2024 12:03:40 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2024 16:59:37 GMT",
"version": "v2"
}
] | 2024-02-06 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Gorji",
"Mohammad Ali",
""
],
[
"Roussille",
"Hugo",
""
]
] | We present and analyze a new non-perturbative radiative solution of Horndeski gravity. This exact solution is constructed by a disformal mapping of a seed solution of the shift-symmetric Einstein-Scalar system belonging to the Robinson-Trautman geometry describing the gravitational radiation emitted by a time-dependent... |
1109.6709 | Monica Forte | M\'onica I. Forte and Carlos E. Laciana | Can the conformal factor of the gravitational field be a physical degree
of freedom? | Printed in the UK PII: S0264-9381(99)02795-1 | Class. Quantum Grav. 16 (1999) 3137-3146 | 10.1088/0264-9381/16/10/307 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The role of the conformal factor was analysed in two gauge-invariant
perturbative formulations. Using the classical and quantum linearized
perturbation approach given by Mukhanov et al \cite{Mukhanov:1990me}, the
non-physical behaviour of the conformal perturbation as an isolated degree of
freedom is shown. In the qu... | [
{
"created": "Fri, 30 Sep 2011 03:48:00 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Forte",
"Mónica I.",
""
],
[
"Laciana",
"Carlos E.",
""
]
] | The role of the conformal factor was analysed in two gauge-invariant perturbative formulations. Using the classical and quantum linearized perturbation approach given by Mukhanov et al \cite{Mukhanov:1990me}, the non-physical behaviour of the conformal perturbation as an isolated degree of freedom is shown. In the quan... |
1206.5861 | Marcos Ramirez | Reinaldo J. Gleiser, Marcos A. Ramirez | Perturbative evolution of the static configurations, quasinormal modes
and quasi normal ringing in the Apostolatos - Thorne cylindrical shell model | 27 pages, 7 figures | 2013 Class. Quantum Grav. 30 085008 | 10.1088/0264-9381/30/8/085008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the perturbative evolution of the static configurations, quasinormal
modes and quasi normal ringing in the Apostolatos - Thorne cylindrical shell
model. We consider first an expansion in harmonic modes and show that it
provides a complete solution for the characteristic value problem for the
finite perturbat... | [
{
"created": "Tue, 26 Jun 2012 00:01:20 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Mar 2013 20:02:10 GMT",
"version": "v2"
}
] | 2013-03-27 | [
[
"Gleiser",
"Reinaldo J.",
""
],
[
"Ramirez",
"Marcos A.",
""
]
] | We study the perturbative evolution of the static configurations, quasinormal modes and quasi normal ringing in the Apostolatos - Thorne cylindrical shell model. We consider first an expansion in harmonic modes and show that it provides a complete solution for the characteristic value problem for the finite perturbatio... |
0909.1202 | S. Mignemi | S. Mignemi | Extended uncertainty principle and the geometry of (anti)-de Sitter
space | 8 pages, plain TeX, references added | Mod.Phys.Lett.A25:1697-1703,2010 | 10.1142/S0217732310033426 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been proposed that on (anti)-de Sitter background, the Heisenberg
uncertainty principle should be modified by the introduction of a term
proportional to the cosmological constant. We show that this modification of
the uncertainty principle can be derived straightforwardly from the geometric
properties of (anti... | [
{
"created": "Mon, 7 Sep 2009 10:23:21 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Oct 2009 10:05:01 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Mignemi",
"S.",
""
]
] | It has been proposed that on (anti)-de Sitter background, the Heisenberg uncertainty principle should be modified by the introduction of a term proportional to the cosmological constant. We show that this modification of the uncertainty principle can be derived straightforwardly from the geometric properties of (anti)-... |
1702.04716 | Muhammad Sharif | M. Sharif and Saadia Mumtaz | Stability of Accelerated Expansion in Nonlinear Electrodynamics | 17 pages, 5 figures, accepted for publication in EPJC | Eur. Phys. J. C 77(2017)136 | 10.1140/epjc/s10052-017-4704-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to study the phase space analysis of isotropic and
homogenous universe model by taking a noninteracting mixture of electromagnetic
and viscous radiating fluids whose viscous pressure satisfies a nonlinear
version of the Israel-Stewart transport equation. We establish an autonomous
system of equa... | [
{
"created": "Wed, 15 Feb 2017 03:26:30 GMT",
"version": "v1"
}
] | 2017-03-08 | [
[
"Sharif",
"M.",
""
],
[
"Mumtaz",
"Saadia",
""
]
] | This paper is devoted to study the phase space analysis of isotropic and homogenous universe model by taking a noninteracting mixture of electromagnetic and viscous radiating fluids whose viscous pressure satisfies a nonlinear version of the Israel-Stewart transport equation. We establish an autonomous system of equati... |
0902.1551 | Don Marolf | Donald Marolf | Solving the Problem of Time in Mini-superspace: Measurement of Dirac
Observables | 12 pages, ReVTeX | Phys.Rev.D79:084016,2009 | 10.1103/PhysRevD.79.084016 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One solution to the so-called problem of time is to construct certain Dirac
observables, sometimes called evolving constants of motion. There has been some
discussion in the literature about the interpretation of such observables, and
in particular whether single Dirac observables can be measured. Here we clarify
the... | [
{
"created": "Mon, 9 Feb 2009 22:31:26 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Marolf",
"Donald",
""
]
] | One solution to the so-called problem of time is to construct certain Dirac observables, sometimes called evolving constants of motion. There has been some discussion in the literature about the interpretation of such observables, and in particular whether single Dirac observables can be measured. Here we clarify the s... |
2107.09713 | Thanasis Karakasis | Thanasis Karakasis, Eleftherios Papantonopoulos, Christoforos Vlachos | $f({\sf R})$ Gravity Wormholes sourced by a Phantom Scalar Field | Accepted for publication in PRD | Phys. Rev. D 105, 024006 (2022) | 10.1103/PhysRevD.105.024006 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We derive an exact wormhole spacetime supported by a phantom scalar field in
the context of $f({\sf R})$ gravity. Without specifying the form of the $f({\sf
R})$ function, the scalar field self-interacts with a mass term potential that
is derived from the scalar equation and the resulting $f({\sf R})$ model is
purely... | [
{
"created": "Tue, 20 Jul 2021 18:33:53 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Jul 2021 19:51:40 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Dec 2021 13:06:49 GMT",
"version": "v3"
}
] | 2022-01-07 | [
[
"Karakasis",
"Thanasis",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Vlachos",
"Christoforos",
""
]
] | We derive an exact wormhole spacetime supported by a phantom scalar field in the context of $f({\sf R})$ gravity. Without specifying the form of the $f({\sf R})$ function, the scalar field self-interacts with a mass term potential that is derived from the scalar equation and the resulting $f({\sf R})$ model is purely s... |
0910.4097 | Tomi Koivisto | Tomi S. Koivisto | Cosmology of modified (but second order) gravity | 18 pages, 2 figures. Based on a talk given at the 4th Gamow
conference "Astrophysics and Cosmology after Gamow: recent progress and new
horizons" at Odessa, Ukraine, 17-23 August 2009 | AIP Conf.Proc.1206:79-96,2010 | 10.1063/1.3292516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a brief review of modified gravity cosmologies. Generically
extensions of gravity action involve higher derivative terms, which can result
in ghosts and instabilities. There are three ways to circumvent this:
Chern-Simons terms, first order variational principle and nonlocality. We
consider recent cosmologica... | [
{
"created": "Wed, 21 Oct 2009 14:23:49 GMT",
"version": "v1"
}
] | 2010-02-24 | [
[
"Koivisto",
"Tomi S.",
""
]
] | This is a brief review of modified gravity cosmologies. Generically extensions of gravity action involve higher derivative terms, which can result in ghosts and instabilities. There are three ways to circumvent this: Chern-Simons terms, first order variational principle and nonlocality. We consider recent cosmological ... |
gr-qc/0401110 | Gilad Gour | G. Gour and V. Suneeta | Comparison of area spectra in loop quantum gravity | 8 pages, Revtex 4, version to appear in Classical and Quantum Gravity | Class.Quant.Grav. 21 (2004) 3405-3418 | 10.1088/0264-9381/21/14/006 | null | gr-qc hep-th quant-ph | null | We compare two area spectra proposed in loop quantum gravity in different
approaches to compute the entropy of the Schwarzschild black hole. We describe
the black hole in general microcanonical and canonical area ensembles for these
spectra. We show that in the canonical ensemble, the results for all
statistical quan... | [
{
"created": "Tue, 27 Jan 2004 21:28:02 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Feb 2004 22:06:33 GMT",
"version": "v2"
},
{
"created": "Tue, 25 May 2004 18:47:06 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Gour",
"G.",
""
],
[
"Suneeta",
"V.",
""
]
] | We compare two area spectra proposed in loop quantum gravity in different approaches to compute the entropy of the Schwarzschild black hole. We describe the black hole in general microcanonical and canonical area ensembles for these spectra. We show that in the canonical ensemble, the results for all statistical quanti... |
0911.3401 | Perivolaropoulos Leandros | L. Perivolaropoulos | PPN Parameter $\gamma$ and Solar System Constraints of Massive
Brans-Dicke Theories | 4 pages (revtex), 1 figure. Improved Figure 1, improved presentation.
Accepted for publication in Phys. Rev. D | Phys.Rev.D81:047501,2010 | 10.1103/PhysRevD.81.047501 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous solar system constraints of the Brans-Dicke (BD) parameter $\omega$
have either ignored the effects of the scalar field potential (mass terms) or
assumed a highly massive scalar field. Here, we interpolate between the above
two assumptions and derive the solar system constraints on the BD parameter
$\omega$ ... | [
{
"created": "Tue, 17 Nov 2009 21:10:50 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2009 14:09:49 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jan 2010 08:26:05 GMT",
"version": "v3"
}
] | 2010-05-12 | [
[
"Perivolaropoulos",
"L.",
""
]
] | Previous solar system constraints of the Brans-Dicke (BD) parameter $\omega$ have either ignored the effects of the scalar field potential (mass terms) or assumed a highly massive scalar field. Here, we interpolate between the above two assumptions and derive the solar system constraints on the BD parameter $\omega$ fo... |
1503.06386 | Cosimo Bambi | Naoki Tsukamoto, Cosimo Bambi | Collisional Penrose Process in Rotating Wormhole Spacetime | 8 pages, 2 figures. v2: corrected a few typos | Phys. Rev. D 91, 104040 (2015) | 10.1103/PhysRevD.91.104040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a collisional Penrose process, two particles coming from the
asymptotically flat region collide in the ergosphere of a compact object. The
collision produces two new particles, one with positive energy and one with
negative energy. When the particle with positive energy escapes to infinity,
the process extracts en... | [
{
"created": "Sun, 22 Mar 2015 05:20:05 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2015 23:53:44 GMT",
"version": "v2"
}
] | 2015-06-02 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Bambi",
"Cosimo",
""
]
] | In a collisional Penrose process, two particles coming from the asymptotically flat region collide in the ergosphere of a compact object. The collision produces two new particles, one with positive energy and one with negative energy. When the particle with positive energy escapes to infinity, the process extracts ener... |
1502.06853 | Frans Pretorius | Matthew W. Choptuik, Luis Lehner, Frans Pretorius | Probing Strong Field Gravity Through Numerical Simulations | 67 pages, 10 figures. To be published in "General Relativity and
Gravitation: A Centennial Perspective", eds. A. Ashtekar, B. Berger, J.
Isenberg and M. A. H. MacCallum (Cambridge University Press), 2015.
(submitted June 2014) | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is an overview of the contributions numerical relativity has
made to our understanding of strong field gravity, to be published in the book
"General Relativity and Gravitation: A Centennial Perspective", commemorating
the 100th anniversary of general relativity.
| [
{
"created": "Tue, 24 Feb 2015 16:02:30 GMT",
"version": "v1"
}
] | 2015-02-25 | [
[
"Choptuik",
"Matthew W.",
""
],
[
"Lehner",
"Luis",
""
],
[
"Pretorius",
"Frans",
""
]
] | This article is an overview of the contributions numerical relativity has made to our understanding of strong field gravity, to be published in the book "General Relativity and Gravitation: A Centennial Perspective", commemorating the 100th anniversary of general relativity. |
0808.0587 | Edward Teo | Yu Chen, Edward Teo | A rotating black lens solution in five dimensions | 25 pages, 2 figures, LaTeX | Phys.Rev.D78:064062,2008 | 10.1103/PhysRevD.78.064062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has recently been shown that a stationary, asymptotically flat vacuum
black hole in five space-time dimensions with two commuting axial symmetries
must have an event horizon with either a spherical, ring or lens-space
topology. In this paper, we study the third possibility, a so-called black lens
with L(n,1) horiz... | [
{
"created": "Tue, 5 Aug 2008 15:36:05 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Chen",
"Yu",
""
],
[
"Teo",
"Edward",
""
]
] | It has recently been shown that a stationary, asymptotically flat vacuum black hole in five space-time dimensions with two commuting axial symmetries must have an event horizon with either a spherical, ring or lens-space topology. In this paper, we study the third possibility, a so-called black lens with L(n,1) horizon... |
1506.07802 | Jose Luis Bl\'azquez-Salcedo | Jose Luis Bl\'azquez-Salcedo, Jutta Kunz, Francisco Navarro-L\'erida,
Eugen Radu | Radially excited rotating black holes in Einstein-Maxwell-Chern-Simons
theory | 24 pages, 28 figures | Phys. Rev. D 92, 044025 (2015) | 10.1103/PhysRevD.92.044025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rotating black holes in Einstein-Maxwell-Chern-Simons theory possess
remarkable features, when the Chern-Simons coupling constant reaches a critical
value. Representing single asymptotically flat black holes with horizons of
spherical topology, they exhibit non-uniqueness. In particular, there even
exist extremal and... | [
{
"created": "Thu, 25 Jun 2015 15:59:47 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Navarro-Lérida",
"Francisco",
""
],
[
"Radu",
"Eugen",
""
]
] | Rotating black holes in Einstein-Maxwell-Chern-Simons theory possess remarkable features, when the Chern-Simons coupling constant reaches a critical value. Representing single asymptotically flat black holes with horizons of spherical topology, they exhibit non-uniqueness. In particular, there even exist extremal and n... |
1511.02806 | Ernesto F. Eiroa | Ernesto F. Eiroa, Griselda Figueroa-Aguirre | Thin-shell wormholes with charge in F(R) gravity | 10 pages, 2 figures; v2: minor changes, 1 new reference added | Eur. Phys. J. C (2016) 76:132 | 10.1140/epjc/s10052-016-3984-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we construct a class of constant curvature and spherically
symmetric thin-shell Lorentzian wormholes in F(R) theories of gravity and we
analyze their stability under perturbations preserving the symmetry. We find
that the junction conditions determine the equation of state of the matter at
the throat... | [
{
"created": "Mon, 9 Nov 2015 19:12:49 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Mar 2016 17:27:51 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Figueroa-Aguirre",
"Griselda",
""
]
] | In this article, we construct a class of constant curvature and spherically symmetric thin-shell Lorentzian wormholes in F(R) theories of gravity and we analyze their stability under perturbations preserving the symmetry. We find that the junction conditions determine the equation of state of the matter at the throat. ... |
2203.00766 | S. M. M. Rasouli | S. M. M. Rasouli, M. Sakellariadou and Paulo Vargas Moniz | Geodesic deviation in Saez--Ballester theory | 33 pages, 6 figures | Physics of the Dark Universe 37 (2022) 101112 | 10.1016/j.dark.2022.101112 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic deviation (GD) equation in a generalized version of the
S\'{a}ez--Ballester (SB) theory in arbitrary dimensions. We first establish a
general formalism and then restrict to particular cases, where (i) the
matter-energy distribution is that of a perfect fluid, and (ii) the spacetime
geometry is d... | [
{
"created": "Tue, 1 Mar 2022 22:15:56 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Sep 2022 11:54:51 GMT",
"version": "v2"
}
] | 2022-09-27 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Sakellariadou",
"M.",
""
],
[
"Moniz",
"Paulo Vargas",
""
]
] | We study the geodesic deviation (GD) equation in a generalized version of the S\'{a}ez--Ballester (SB) theory in arbitrary dimensions. We first establish a general formalism and then restrict to particular cases, where (i) the matter-energy distribution is that of a perfect fluid, and (ii) the spacetime geometry is des... |
gr-qc/0404062 | Lorenzo Iorio | Lorenzo Iorio, Eelco Doornbos | How to reach a few percent level in determining the Lense-Thirring
effect? | Latex2e, 22 pag. 1 table, 2 figures, 45 references. Changes in the
Abstract, Introduction and Conclusions. Discussion on the non-gravitational
perturbations on Ajisai and on the impact of the secular rates of the even
zonal harmonics added. EIGEN-CG01C CHAMP+GRACE+terrestrial
gravimetry/altimetry Earth gravity ... | Gen.Rel.Grav. 37 (2005) 1059-1074 | 10.1007/s10714-005-0091-2 | null | gr-qc astro-ph | null | In this paper we discuss and compare a node-only LAGEOS-LAGEOS II combination
and a node-only LAGEOS-LAGEOS II-Ajisai-Jason1 combination for the
determination of the Lense-Thirring effect. The new combined EIGEN-CG01C Earth
gravity model has been adopted. The second combination cancels the first three
even zonal harm... | [
{
"created": "Tue, 13 Apr 2004 20:52:58 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Aug 2004 23:30:12 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Oct 2004 07:13:58 GMT",
"version": "v3"
},
{
"created": "Sat, 30 Oct 2004 08:39:54 GMT",
"version": "v4"
},
{
"c... | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Doornbos",
"Eelco",
""
]
] | In this paper we discuss and compare a node-only LAGEOS-LAGEOS II combination and a node-only LAGEOS-LAGEOS II-Ajisai-Jason1 combination for the determination of the Lense-Thirring effect. The new combined EIGEN-CG01C Earth gravity model has been adopted. The second combination cancels the first three even zonal harmon... |
1511.05058 | Mikhail Gorbatenko | M.V.Gorbatenko, V.P.Neznamov, E.Yu.Popov | Analysis of half-spin particle motion in Reissner-Nordstroem and
Schwarzschild fields by means of the method of effective potentials | 12 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper presents the analysis of effective potentials of Dirac equations in
Schwarzschild and Reissner-Nordstroem fields. It is shown that in the majority
of the explored cases the condition of a particle "fall" to appropriate event
horizons is fulfilled. The exception is one of the solutions with normalizable
wave... | [
{
"created": "Mon, 16 Nov 2015 17:46:34 GMT",
"version": "v1"
}
] | 2015-11-17 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Neznamov",
"V. P.",
""
],
[
"Popov",
"E. Yu.",
""
]
] | The paper presents the analysis of effective potentials of Dirac equations in Schwarzschild and Reissner-Nordstroem fields. It is shown that in the majority of the explored cases the condition of a particle "fall" to appropriate event horizons is fulfilled. The exception is one of the solutions with normalizable wave f... |
1303.2843 | Hamid Reza Sepangi | Zahra Haghani, Hamid Reza Sepangi, Shahab Shahidi | Curvature perturbations of quasidilaton non-linear massive gravity | 12 pages | Phys. Rev. D 87 (2013) 124014 | 10.1103/PhysRevD.87.124014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological perturbations of the recently proposed extension of
non-linear massive gravity with a scalar field. The added scalar field ensures
a new symmetry on the field space of the theory. The theory has the property of
having a flat dS solution, in contrast to the standard dRGT massive gravity.
The ... | [
{
"created": "Tue, 12 Mar 2013 11:16:55 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Jun 2013 11:41:49 GMT",
"version": "v2"
}
] | 2013-07-12 | [
[
"Haghani",
"Zahra",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We study the cosmological perturbations of the recently proposed extension of non-linear massive gravity with a scalar field. The added scalar field ensures a new symmetry on the field space of the theory. The theory has the property of having a flat dS solution, in contrast to the standard dRGT massive gravity. The te... |
1207.4702 | Alejandro Perez | Carlos Kozameh, Osvaldo Moreschi and Alejandro Perez | Smooth null hypersurfaces near the horizon in the presence of tails | null | null | 10.1103/PhysRevD.87.064039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the power-law decay modes found in linear perturbations of
Schwarzschild black holes, generally called tails, do not produce caustics on a
naturally defined family of null surfaces in the neighborhood of i+ of a black
hole horizon.
| [
{
"created": "Thu, 19 Jul 2012 15:09:28 GMT",
"version": "v1"
}
] | 2013-04-03 | [
[
"Kozameh",
"Carlos",
""
],
[
"Moreschi",
"Osvaldo",
""
],
[
"Perez",
"Alejandro",
""
]
] | We show that the power-law decay modes found in linear perturbations of Schwarzschild black holes, generally called tails, do not produce caustics on a naturally defined family of null surfaces in the neighborhood of i+ of a black hole horizon. |
gr-qc/0009074 | Christodoulakis Theodosios | T. Christodoulakis, G.O. Papadopoulos | Conditional Symmetries, the True Degree of Freedom and G.C.T. Invariant
Wave functions for the general Bianchi Type II Vacuum Cosmology | 10 pages, no figures, LaTeX2e Typesetting system | Phys.Lett.B501:264-268,2001 | 10.1016/S0370-2693(01)00119-8 | null | gr-qc | null | The quantization of the most general Bianchi Type II geometry -with all six
scale factors, as well as the lapse function and the shift vector, present- is
considered. In an earlier work, a first reduction of the initial 6-dimensional
configuration space, to a 4-dimensional one, has been achieved by the usage of
the i... | [
{
"created": "Thu, 21 Sep 2000 12:15:41 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Christodoulakis",
"T.",
""
],
[
"Papadopoulos",
"G. O.",
""
]
] | The quantization of the most general Bianchi Type II geometry -with all six scale factors, as well as the lapse function and the shift vector, present- is considered. In an earlier work, a first reduction of the initial 6-dimensional configuration space, to a 4-dimensional one, has been achieved by the usage of the inf... |
1811.11156 | Martin Bojowald | Bekir Baytas, Martin Bojowald and Sean Crowe | Equivalence of models in loop quantum cosmology and group field theory | 10 pages | Universe 5 (2019) 41 | 10.3390/universe5020041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paradigmatic models often used to highlight cosmological features of loop
quantum gravity and group field theory are shown to be equivalent, in the sense
that they are different realizations of the same model given by harmonic
cosmology. The loop version of harmonic cosmology is a canonical realization,
while the... | [
{
"created": "Tue, 27 Nov 2018 18:46:04 GMT",
"version": "v1"
}
] | 2019-05-29 | [
[
"Baytas",
"Bekir",
""
],
[
"Bojowald",
"Martin",
""
],
[
"Crowe",
"Sean",
""
]
] | The paradigmatic models often used to highlight cosmological features of loop quantum gravity and group field theory are shown to be equivalent, in the sense that they are different realizations of the same model given by harmonic cosmology. The loop version of harmonic cosmology is a canonical realization, while the g... |
1302.3950 | Alexander Kamenshchik | A. Kamenshchik, Z. Keresztes and L. Gergely | The paradox of soft singularity crossing avoided by distributional
cosmological quantities | 3 pages, to be published in the Proceedings of Thirteenth Marcel
Grossmann Meeting - MG13 on Recent Developments in Theoretical and
Experimental General Relativity, Astrophysics, and Relativistic Field
Theories, (Stockholm, July 1-7, 2012) | Proceedings of the Thirteenth Marcel Grossman Meeting on General
Relativity, Eds. RT Jantzen, K Rosquist, R Ruffini, World Scientific
Singapore, p. 1847-1849 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A flat Friedmann universe filled with a mixture of anti-Chaplygin gas and
dust-like matter evolves into a future soft singularity, where despite infinite
tidal forces the geodesics can be continued. In the singularity the pressure of
the anti-Chaplygin gas diverges, while its energy density is zero. The dust
energy d... | [
{
"created": "Sat, 16 Feb 2013 09:48:23 GMT",
"version": "v1"
}
] | 2014-12-23 | [
[
"Kamenshchik",
"A.",
""
],
[
"Keresztes",
"Z.",
""
],
[
"Gergely",
"L.",
""
]
] | A flat Friedmann universe filled with a mixture of anti-Chaplygin gas and dust-like matter evolves into a future soft singularity, where despite infinite tidal forces the geodesics can be continued. In the singularity the pressure of the anti-Chaplygin gas diverges, while its energy density is zero. The dust energy den... |
1301.7466 | Jorge Pullin | Jorge Pullin, Parampreet Singh | Report on the session QG4 of the 13th Marcel Grossmann Meeting | 5 pages, no figures, to appear in the proceedings | null | null | LSU-REL-013013 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize the talks presented at the QG4 session (loop quantum gravity:
cosmology and black holes) of the 13th Marcel Grossmann Meeting held in
Stockholm, Sweden.
| [
{
"created": "Wed, 30 Jan 2013 23:13:20 GMT",
"version": "v1"
}
] | 2013-02-01 | [
[
"Pullin",
"Jorge",
""
],
[
"Singh",
"Parampreet",
""
]
] | We summarize the talks presented at the QG4 session (loop quantum gravity: cosmology and black holes) of the 13th Marcel Grossmann Meeting held in Stockholm, Sweden. |
2211.05212 | Markku Oksanen | Masud Chaichian, Amir Ghal'e, Markku Oksanen | Alternative approach to the Starobinsky model for inflation scenarios | 24 pages, 4 figures. v4: corrections to language and references;
added affiliation; to appear in Phys. Rev. D. arXiv admin note: substantial
text overlap with arXiv:2012.10889 | null | 10.1103/PhysRevD.107.023527 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $R+R^2$ model of gravity with the corresponding shallow potential in the
Einstein frame is consistent with the observations. Recently, many efforts have
been made to generalize the $R+R^2$ (Starobinsky) model of inflation or use
other shallow potentials to construct a model for the early Universe. We revise
the q... | [
{
"created": "Thu, 27 Oct 2022 14:40:49 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Nov 2022 11:44:35 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Dec 2022 16:38:30 GMT",
"version": "v3"
},
{
"created": "Tue, 17 Jan 2023 08:55:22 GMT",
"version": "v4"
}
] | 2023-02-08 | [
[
"Chaichian",
"Masud",
""
],
[
"Ghal'e",
"Amir",
""
],
[
"Oksanen",
"Markku",
""
]
] | The $R+R^2$ model of gravity with the corresponding shallow potential in the Einstein frame is consistent with the observations. Recently, many efforts have been made to generalize the $R+R^2$ (Starobinsky) model of inflation or use other shallow potentials to construct a model for the early Universe. We revise the que... |
2009.07287 | Vitor Cardoso | Vitor Cardoso, Wen-di Guo, Caio F. B. Macedo, Paolo Pani | The tune of the universe: the role of plasma in tests of strong-field
gravity | 12 pages, RevTex4. v3: improved discussion and minor corrections.
Version published in MNRAS | Monthly Notices of the Royal Astronomical Society, Volume 503,
Issue 1, May 2021 | 10.1093/mnras/stab404 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave astronomy, together with precise pulsar timing and long
baseline interferometry, is changing our ability to perform tests of
fundamental physics with astrophysical observations. Some of these tests are
based on electromagnetic probes or electrically charged bodies, and assume an
empty universe. How... | [
{
"created": "Tue, 15 Sep 2020 18:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Sep 2020 03:55:47 GMT",
"version": "v2"
},
{
"created": "Sat, 13 Mar 2021 10:36:30 GMT",
"version": "v3"
}
] | 2021-04-13 | [
[
"Cardoso",
"Vitor",
""
],
[
"Guo",
"Wen-di",
""
],
[
"Macedo",
"Caio F. B.",
""
],
[
"Pani",
"Paolo",
""
]
] | Gravitational-wave astronomy, together with precise pulsar timing and long baseline interferometry, is changing our ability to perform tests of fundamental physics with astrophysical observations. Some of these tests are based on electromagnetic probes or electrically charged bodies, and assume an empty universe. Howev... |
0706.3294 | Christian Corda cordac | Christian Corda | Moriond 07 proceedings:"Extension of the frequency-range of
interferometers for the "magnetic" components of gravitational waves?" | To appear in proceedings of the Rencontres de Moriond, Gravitational
Waves and Experimental Gravity, La Thuile, Val d'Aosta, Italy (March 11-18,
2007) | Proceedings of the XLIInd Rencontres de Moriond, Gravitational
Waves and Experimental Gravity, p. 95, Ed. J. Dumarchez and J. T. Tran, Than
Van, THE GIOI Publishers (2007) | null | null | gr-qc | null | Recently some papers in the literature have shown the presence and importance
of the so-called {}"magnetic" components of gravitational waves (GWs), which
have to be taken into account in the context of the total response functions of
interferometers for GWs propagating from arbitrary directions. In this paper
the re... | [
{
"created": "Fri, 22 Jun 2007 09:28:04 GMT",
"version": "v1"
}
] | 2010-01-25 | [
[
"Corda",
"Christian",
""
]
] | Recently some papers in the literature have shown the presence and importance of the so-called {}"magnetic" components of gravitational waves (GWs), which have to be taken into account in the context of the total response functions of interferometers for GWs propagating from arbitrary directions. In this paper the resp... |
1004.2952 | Ghanashyam Date | Ghanashyam Date | Lectures on LQG/LQC | 72 pages, no figures | null | null | IMSc/2010/03/03 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A School on Loop Quantum Gravity was held at the IMSc during Sept 8 -- 18,
2009. In the first week a basic introduction to LQG was provided while in the
second week the focus was on the two main application, to cosmology (LQC) and
to the black hole entropy. These notes are an expanded written account of the
lectures ... | [
{
"created": "Sat, 17 Apr 2010 11:02:22 GMT",
"version": "v1"
}
] | 2010-04-20 | [
[
"Date",
"Ghanashyam",
""
]
] | A School on Loop Quantum Gravity was held at the IMSc during Sept 8 -- 18, 2009. In the first week a basic introduction to LQG was provided while in the second week the focus was on the two main application, to cosmology (LQC) and to the black hole entropy. These notes are an expanded written account of the lectures th... |
1601.00585 | Nelson Videla Dr. | Ram\'on Herrera, Nelson Videla, Marco Olivares | Warm intermediate inflationary Universe model in the presence of a
Generalized Chaplygin Gas | 33 pages, 7 figues, final version accepted for publication in The
European Physical Journal C. arXiv admin note: text overlap with
arXiv:1504.07476 | null | 10.1140/epjc/s10052-016-3881-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A warm intermediate inflationary model in the context of Generalized
Chaplygin Gas is investigated. We study this model in the weak and strong
dissipative regimes, considering a generalized form of the dissipative
coefficient $\Gamma=\Gamma(T,\phi)$, and we describe the inflationary dynamics
in the slow-roll approxim... | [
{
"created": "Mon, 4 Jan 2016 17:47:15 GMT",
"version": "v1"
}
] | 2016-02-17 | [
[
"Herrera",
"Ramón",
""
],
[
"Videla",
"Nelson",
""
],
[
"Olivares",
"Marco",
""
]
] | A warm intermediate inflationary model in the context of Generalized Chaplygin Gas is investigated. We study this model in the weak and strong dissipative regimes, considering a generalized form of the dissipative coefficient $\Gamma=\Gamma(T,\phi)$, and we describe the inflationary dynamics in the slow-roll approximat... |
2201.08392 | Bivudutta Mishra Dr. | A.S. Agrawal, B. Mishra, P.H.R.S. Moraes | Unimodular Gravity Traversable Wormholes | 7 pages, 7 figures | Eur. Phys. J. Plus (2023) 138:275 | 10.1140/epjp/s13360-023-03872-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormholes are outstanding solutions of Einstein's General Relativity. They
were worked out in the late 1980's by Morris and Thorne, who have figured out a
recipe that wormholes must obey in order to be traversable, that is, safely
crossed by travelers. A remarkable feature is that General Relativity Theory
wormholes ... | [
{
"created": "Thu, 20 Jan 2022 17:07:01 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2022 09:27:28 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Mar 2023 10:55:00 GMT",
"version": "v3"
},
{
"created": "Tue, 28 Mar 2023 05:41:08 GMT",
"version": "v4"
}
] | 2023-03-29 | [
[
"Agrawal",
"A. S.",
""
],
[
"Mishra",
"B.",
""
],
[
"Moraes",
"P. H. R. S.",
""
]
] | Wormholes are outstanding solutions of Einstein's General Relativity. They were worked out in the late 1980's by Morris and Thorne, who have figured out a recipe that wormholes must obey in order to be traversable, that is, safely crossed by travelers. A remarkable feature is that General Relativity Theory wormholes mu... |
1810.12346 | David Daverio Dr | David Daverio, Yves Dirian, Ermis Mitsou | Apples with Apples comparison of 3+1 conformal numerical relativity
schemes | 33 pages, 25 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper contains a comprehensive comparison catalog of `Apples with
Apples' tests for the BSSNOK, CCZ4 and Z4c numerical relativity schemes, with
and without constraint damping terms for the latter two. We use basic numerical
methods and reach the same level of accuracy as existing results in the
literature. We fi... | [
{
"created": "Mon, 29 Oct 2018 18:49:49 GMT",
"version": "v1"
}
] | 2018-10-31 | [
[
"Daverio",
"David",
""
],
[
"Dirian",
"Yves",
""
],
[
"Mitsou",
"Ermis",
""
]
] | This paper contains a comprehensive comparison catalog of `Apples with Apples' tests for the BSSNOK, CCZ4 and Z4c numerical relativity schemes, with and without constraint damping terms for the latter two. We use basic numerical methods and reach the same level of accuracy as existing results in the literature. We find... |
gr-qc/9707038 | Michael A. Clayton | M.A. Clayton | Issues in Quantum-Geometric Propagation | 19 pages; requires amsart, amssymb, amsmath | null | null | CERN--TH/97--167 | gr-qc hep-th quant-ph | null | A discussion of relativistic quantum-geometric mechanics on phase space and
its generalisation to the propagation of free, massive, quantum-geometric
scalar fields on curved spacetimes is given. It is shown that in an arbitrary
coordinate system and frame of reference in a flat spacetime, the resulting
propagator is ... | [
{
"created": "Wed, 16 Jul 1997 15:13:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Clayton",
"M. A.",
""
]
] | A discussion of relativistic quantum-geometric mechanics on phase space and its generalisation to the propagation of free, massive, quantum-geometric scalar fields on curved spacetimes is given. It is shown that in an arbitrary coordinate system and frame of reference in a flat spacetime, the resulting propagator is ne... |
2211.04263 | Jinsong Yang | Jinsong Yang, Cong Zhang, Yongge Ma | Shadow and stability of quantum-corrected black holes | 15 pages, 9 figures | Eur. Phys. J. C 83, 619 (2023) | 10.1140/epjc/s10052-023-11800-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the quantum Oppenheimer-Snyder gravitational collapse model has been
proposed in loop quantum gravity, providing quantum-corrected Schwarzschild
spacetimes as the exterior of the collapsing dust ball. In this paper, the
quantum gravity effects on the black hole shadows in this model are studied,
and the stab... | [
{
"created": "Tue, 8 Nov 2022 14:14:21 GMT",
"version": "v1"
},
{
"created": "Mon, 29 May 2023 11:22:01 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jul 2023 14:25:29 GMT",
"version": "v3"
}
] | 2023-07-20 | [
[
"Yang",
"Jinsong",
""
],
[
"Zhang",
"Cong",
""
],
[
"Ma",
"Yongge",
""
]
] | Recently the quantum Oppenheimer-Snyder gravitational collapse model has been proposed in loop quantum gravity, providing quantum-corrected Schwarzschild spacetimes as the exterior of the collapsing dust ball. In this paper, the quantum gravity effects on the black hole shadows in this model are studied, and the stabil... |
1012.5622 | Lorenzo Iorio | Lorenzo Iorio | General relativistic spin-orbit and spin-spin effects on the motion of
rotating particles in an external gravitational field | LaTex2e, 24 pages, no figures, no tables. Minor changes. Version
matching the one at press in General Relativity and Gravitation (GRG) | Gen. Relativ. Gravit..44:719-736,2012 | 10.1007/s10714-011-1302-7 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically compute the orbital effects induced on the motion of a
spinning particle geodesically traveling around a central rotating body by the
general relativistic two-body spin-spin and spin-orbit interactions. We use the
weak-field and slow-motion leading-order approximation. Neither assumptions on
the eccen... | [
{
"created": "Mon, 27 Dec 2010 15:08:11 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2011 14:51:41 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Feb 2011 19:14:41 GMT",
"version": "v3"
},
{
"created": "Wed, 16 Feb 2011 17:44:42 GMT",
"version": "v4"
},
{
"cr... | 2012-03-13 | [
[
"Iorio",
"Lorenzo",
""
]
] | We analytically compute the orbital effects induced on the motion of a spinning particle geodesically traveling around a central rotating body by the general relativistic two-body spin-spin and spin-orbit interactions. We use the weak-field and slow-motion leading-order approximation. Neither assumptions on the eccentr... |
1506.03005 | Sharmanthie Fernando | Sharmanthie Fernando | Black holes in massive gravity: quasinormal modes of Dirac field
perturbations | 23 pages, 17 figures, accepted to be published in Modern Physics
Letters A | Modern Physics Letters A, Vol: 30, No: 29, 1550147 (2015) | 10.1142/S0217732315501473 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied quasinormal modes of spinor $\frac{1}{2}$, massless Dirac
field perturbations of a black hole in massive gravity. The parameters of the
theory, such as the mass of the black hole, the scalar charge of the black
hole, mode number and the multipole number are varied to observe how the
corresponding quas... | [
{
"created": "Tue, 9 Jun 2015 17:04:47 GMT",
"version": "v1"
}
] | 2015-09-23 | [
[
"Fernando",
"Sharmanthie",
""
]
] | We have studied quasinormal modes of spinor $\frac{1}{2}$, massless Dirac field perturbations of a black hole in massive gravity. The parameters of the theory, such as the mass of the black hole, the scalar charge of the black hole, mode number and the multipole number are varied to observe how the corresponding quasin... |
0908.3388 | Simone Speziale | Lee Smolin and Simone Speziale | A note on the Plebanski action with cosmological constant and an Immirzi
parameter | 14 pages. v2: factor 2 corrected, updated references | Phys.Rev.D81:024032,2010 | 10.1103/PhysRevD.81.024032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the field equations of the Plebanski action for general relativity
when both the cosmological constant and an Immirzi parameter are present. We
show that the Lagrange multiplier, which usually gets identified with the Weyl
curvature, now acquires a trace part. Some consequences of this for a class of
modifie... | [
{
"created": "Mon, 24 Aug 2009 08:54:57 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jan 2010 10:05:04 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Smolin",
"Lee",
""
],
[
"Speziale",
"Simone",
""
]
] | We study the field equations of the Plebanski action for general relativity when both the cosmological constant and an Immirzi parameter are present. We show that the Lagrange multiplier, which usually gets identified with the Weyl curvature, now acquires a trace part. Some consequences of this for a class of modified ... |
gr-qc/9404053 | Donald Marolf | Donald Marolf | Quantum Observables and Recollapsing Dynamics | 18 pages ReVTeX, 35 preprint pages. Presentation modified in response
to referee's Comments, arithmetic mistakes corrected, references updated | Class.Quant.Grav.12:1199-1220,1995 | 10.1088/0264-9381/12/5/011 | CGPG-94/4-5 | gr-qc | null | Within a simple quantization scheme, observables for a large class of finite
dimensional time reparametrization invariant systems may be constructed by
integration over the manifold of time labels. This procedure is shown to
produce a complete set of densely defined operators on a physical Hilbert space
for which an ... | [
{
"created": "Wed, 27 Apr 1994 02:41:07 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 1994 16:52:07 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Sep 1994 01:07:13 GMT",
"version": "v3"
},
{
"created": "Tue, 4 Oct 1994 23:28:09 GMT",
"version": "v4"
},
{
"cre... | 2010-04-06 | [
[
"Marolf",
"Donald",
""
]
] | Within a simple quantization scheme, observables for a large class of finite dimensional time reparametrization invariant systems may be constructed by integration over the manifold of time labels. This procedure is shown to produce a complete set of densely defined operators on a physical Hilbert space for which an in... |
2204.05335 | Kyriakos Destounis Dr. | Giacomo Mascher, Kyriakos Destounis and Kostas D. Kokkotas | Charged black holes in de Sitter space: superradiant amplification of
charged scalar waves and resonant hyperradiation | 10 pages, 8 figures, accepted for publication in Physical Review D,
fixed references | Phys. Rev. D 105, 084052 (2022) | 10.1103/PhysRevD.105.084052 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Black holes typically inhabit highly dynamical galactic environments and are
frequently permeated by accretion media. The inevitable scattering of scalar,
electromagnetic and gravitational waves off rotating and charged black holes
provides a remarkable demonstration of the energy extraction and subsequent
amplificat... | [
{
"created": "Mon, 11 Apr 2022 18:00:05 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Jun 2022 12:59:16 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Mascher",
"Giacomo",
""
],
[
"Destounis",
"Kyriakos",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | Black holes typically inhabit highly dynamical galactic environments and are frequently permeated by accretion media. The inevitable scattering of scalar, electromagnetic and gravitational waves off rotating and charged black holes provides a remarkable demonstration of the energy extraction and subsequent amplificatio... |
1103.0290 | Ryo Saotome | Ratindranath Akhoury, David Garfinkle and Ryo Saotome | Gravitational collapse of k-essence | 14 pages, 8 figures | JHEP 1104 (2011) 096 | 10.1007/JHEP04(2011)096 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform numerical simulations of the gravitational collapse of a k-essence
scalar field. When the field is sufficiently strongly gravitating, a black hole
forms. However, the black hole has two horizons: a light horizon (the ordinary
black hole horizon) and a sound horizon that traps k-essence. In certain cases
th... | [
{
"created": "Tue, 1 Mar 2011 21:24:31 GMT",
"version": "v1"
}
] | 2011-09-12 | [
[
"Akhoury",
"Ratindranath",
""
],
[
"Garfinkle",
"David",
""
],
[
"Saotome",
"Ryo",
""
]
] | We perform numerical simulations of the gravitational collapse of a k-essence scalar field. When the field is sufficiently strongly gravitating, a black hole forms. However, the black hole has two horizons: a light horizon (the ordinary black hole horizon) and a sound horizon that traps k-essence. In certain cases the ... |
0810.3149 | Luis Granda | L. N. Granda and A. Oliveros | Infrared cut-off proposal for the Holographic density | 9 pages, 2 figures, to appear in Phys. Lett. B | Phys.Lett.B669:275-277,2008 | 10.1016/j.physletb.2008.10.017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an infrared cut-off for the holographic the dark-energy, which
besides the square of the Hubble scale also contains the time derivative of the
Hubble scale. This avoids the problem of causality which appears using the
event horizon area as the cut-off, and solves the coincidence problem.
| [
{
"created": "Thu, 16 Oct 2008 23:15:42 GMT",
"version": "v1"
}
] | 2009-02-06 | [
[
"Granda",
"L. N.",
""
],
[
"Oliveros",
"A.",
""
]
] | We propose an infrared cut-off for the holographic the dark-energy, which besides the square of the Hubble scale also contains the time derivative of the Hubble scale. This avoids the problem of causality which appears using the event horizon area as the cut-off, and solves the coincidence problem. |
gr-qc/0412094 | Miguel Lorente | M. Lorente | A discrete curvature on a planar graph | LaTeX, 14 pages. Dedicated to Alberto Galindo on the occasion of his
70th birthday. In "Encuentros de Fisica Fundamental Alberto Galindo" (Ed.
Departamento de Fisica Teorica I de la Universidad Complutense de Madrid)
November 2004 | null | null | null | gr-qc | null | Given a planar graph derived from a spherical, euclidean or hyperbolic
tessellation, one can define a discrete curvature by combinatorial properties,
which after embedding the graph in a compact 2d-manifold, becomes the Gaussian
curvature.
| [
{
"created": "Mon, 20 Dec 2004 12:38:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lorente",
"M.",
""
]
] | Given a planar graph derived from a spherical, euclidean or hyperbolic tessellation, one can define a discrete curvature by combinatorial properties, which after embedding the graph in a compact 2d-manifold, becomes the Gaussian curvature. |
1506.02770 | Narayan Banerjee | Sridip Pal and Narayan Banerjee | Unitary evolution for a quantum Kantowski-Sachs cosmology | 12 pages, 4 figures | null | 10.1088/0264-9381/32/20/205005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that like Bianchi I, V and IX models, a Kantowski-Sachs
cosmological model also allows a unitary evolution on quantization. It has also
been shown that this unitarity is not at the expense of the anisotropy.
Non-unitarity, if there is any, cannot escape notice in this as the evolution
is studied against a... | [
{
"created": "Tue, 9 Jun 2015 04:19:44 GMT",
"version": "v1"
}
] | 2015-10-07 | [
[
"Pal",
"Sridip",
""
],
[
"Banerjee",
"Narayan",
""
]
] | It is shown that like Bianchi I, V and IX models, a Kantowski-Sachs cosmological model also allows a unitary evolution on quantization. It has also been shown that this unitarity is not at the expense of the anisotropy. Non-unitarity, if there is any, cannot escape notice in this as the evolution is studied against a p... |
2004.07655 | J\'unior Diniz Toniato | Nelson Pinto-Neto, J\'ulio C. Fabris, J\'unior D. Toniato, Gustavo. S.
Vicente, and Sandro D. P. Vitenti | Vector perturbations in bouncing cosmology | 10 pages | Phys. Rev. D 101, 123519 (2020) | 10.1103/PhysRevD.101.123519 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An old question surrounding bouncing models concerns their stability under
vector perturbations. Considering perfect fluids or scalar fields, vector
perturbations evolve kinematically as $a^{-2}$, where $a$ is the scale factor.
Consequently, a definite answer concerning the bounce stability depends on an
arbitrary co... | [
{
"created": "Thu, 16 Apr 2020 13:45:46 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Pinto-Neto",
"Nelson",
""
],
[
"Fabris",
"Júlio C.",
""
],
[
"Toniato",
"Júnior D.",
""
],
[
"Vicente",
"Gustavo. S.",
""
],
[
"Vitenti",
"Sandro D. P.",
""
]
] | An old question surrounding bouncing models concerns their stability under vector perturbations. Considering perfect fluids or scalar fields, vector perturbations evolve kinematically as $a^{-2}$, where $a$ is the scale factor. Consequently, a definite answer concerning the bounce stability depends on an arbitrary cons... |
2007.04311 | Ben Kain | Ben Kain | Radial oscillations and stability of multiple-fluid compact stars | 11 pages, 7 figures | Phys. Rev. D 102, 023001 (2020) | 10.1103/PhysRevD.102.023001 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I derive a system of pulsation equations for compact stars made up of an
arbitrary number of perfect fluids that can be used to study radial
oscillations and stability with respect to small perturbations. I assume
spherical symmetry and that the only inter-fluid interactions are
gravitational. My derivation is in lin... | [
{
"created": "Wed, 8 Jul 2020 17:58:07 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Kain",
"Ben",
""
]
] | I derive a system of pulsation equations for compact stars made up of an arbitrary number of perfect fluids that can be used to study radial oscillations and stability with respect to small perturbations. I assume spherical symmetry and that the only inter-fluid interactions are gravitational. My derivation is in line ... |
gr-qc/0408075 | Suresh Paingalil Kunjan | Rizwan Ul Haq Ansari and P K Suresh | Finite temperature effects in brane cosmology | 4 pages, 7 figures, added more references | null | null | null | gr-qc | null | Finite temperature effects in brane world cosmology are studied by
considering the interaction between scalar field and bulk gravity. One-loop
correction to zero-temperature potential is computed by taking into account,
interaction of scalar field and bulk gravity. Phase transitions and high
temperature symmetry rest... | [
{
"created": "Sat, 21 Aug 2004 14:14:28 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Sep 2004 10:47:17 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ansari",
"Rizwan Ul Haq",
""
],
[
"Suresh",
"P K",
""
]
] | Finite temperature effects in brane world cosmology are studied by considering the interaction between scalar field and bulk gravity. One-loop correction to zero-temperature potential is computed by taking into account, interaction of scalar field and bulk gravity. Phase transitions and high temperature symmetry restor... |
1912.02327 | Xiangyun Fu fu | Lu Zhou, Xiangyun Fu, Zhaohui Peng and Jun Chen | Probing the cosmic opacity from Future Gravitational Wave Standard
Sirens | 19pages, 3figures, accepted by PRD | null | 10.1103/PhysRevD.100.123539 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, using the Gaussian Process, we explore the potentiality of
future gravitational wave (GW) measurement to probe cosmic opacity through
comparing its opacity-free luminosity distance (LD) with the opacity-dependent
one from type Ia supernovae (SNIa). GW data points are simulated from the third
generation ... | [
{
"created": "Thu, 5 Dec 2019 00:58:00 GMT",
"version": "v1"
}
] | 2020-01-22 | [
[
"Zhou",
"Lu",
""
],
[
"Fu",
"Xiangyun",
""
],
[
"Peng",
"Zhaohui",
""
],
[
"Chen",
"Jun",
""
]
] | In this work, using the Gaussian Process, we explore the potentiality of future gravitational wave (GW) measurement to probe cosmic opacity through comparing its opacity-free luminosity distance (LD) with the opacity-dependent one from type Ia supernovae (SNIa). GW data points are simulated from the third generation Ei... |
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