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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9911090 | Norimasa Sugiura | Norimasa Sugiura, Ken-ichi Nakao and Tomohiro Harada | Distance-redshift relation in an isotropic inhomogeneous universe II:
Spherically symmetric dust-shell universe | 17 pages, 7 figures | Phys.Rev. D60 (1999) 103508 | 10.1103/PhysRevD.60.103508 | KUNS-1550 | gr-qc | null | The relation between the angular diameter distance and redshift in a
spherically symmetric dust-shell universe is studied. We have discovered that
the relation agrees with that of an appropriate Friedmann-Lemaitre (FL) model
if we set a ``homogeneous'' expansion law and a ``homogeneous'' averaged
density field. This ... | [
{
"created": "Wed, 24 Nov 1999 06:22:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Sugiura",
"Norimasa",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Harada",
"Tomohiro",
""
]
] | The relation between the angular diameter distance and redshift in a spherically symmetric dust-shell universe is studied. We have discovered that the relation agrees with that of an appropriate Friedmann-Lemaitre (FL) model if we set a ``homogeneous'' expansion law and a ``homogeneous'' averaged density field. This wi... |
2009.01397 | Matt Visser | Joshua Baines (Victoria University of Wellington), Thomas Berry
(Victoria University of Wellington), Alex Simpson (Victoria University of
Wellington), and Matt Visser (Victoria University of Wellington) | Darboux diagonalization of the spatial 3-metric in Kerr spacetime | 18 pages | null | 10.1007/s10714-020-02765-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The astrophysical importance of the Kerr spacetime cannot be overstated. Of
the currently known exact solutions to the Einstein field equations, the Kerr
spacetime stands out in terms of its direct applicability to describing
astronomical black hole candidates. In counterpoint, purely mathematically,
there is an old ... | [
{
"created": "Thu, 3 Sep 2020 00:44:41 GMT",
"version": "v1"
}
] | 2021-01-13 | [
[
"Baines",
"Joshua",
"",
"Victoria University of Wellington"
],
[
"Berry",
"Thomas",
"",
"Victoria University of Wellington"
],
[
"Simpson",
"Alex",
"",
"Victoria University of\n Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University... | The astrophysical importance of the Kerr spacetime cannot be overstated. Of the currently known exact solutions to the Einstein field equations, the Kerr spacetime stands out in terms of its direct applicability to describing astronomical black hole candidates. In counterpoint, purely mathematically, there is an old cl... |
2401.00703 | Rajes Ghosh | Chanchal Sharma, Rajes Ghosh and Sudipta Sarkar | Exploring Ladder Symmetry and Love Numbers for Static and Rotating Black
Holes | Title changed, References added, Matches with the version to be
published in Physical Review D as a Letter | Phys.Rev.D 109 (2024) 4, L041505 | 10.1103/PhysRevD.109.L041505 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole solutions of general relativity exhibit a symmetry for the static
perturbations around these spacetimes, known as "ladder symmetry". This
symmetry proves useful in constructing a tower of solutions for perturbations
and elucidating their general properties. Specifically, the presence of this
symmetry leads... | [
{
"created": "Mon, 1 Jan 2024 09:08:22 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jan 2024 12:48:18 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Feb 2024 13:12:48 GMT",
"version": "v3"
}
] | 2024-06-14 | [
[
"Sharma",
"Chanchal",
""
],
[
"Ghosh",
"Rajes",
""
],
[
"Sarkar",
"Sudipta",
""
]
] | Black hole solutions of general relativity exhibit a symmetry for the static perturbations around these spacetimes, known as "ladder symmetry". This symmetry proves useful in constructing a tower of solutions for perturbations and elucidating their general properties. Specifically, the presence of this symmetry leads t... |
1812.01798 | Carlos A. S. Almeida | R. Oliveira, D. M. Dantas, Victor Santos and C. A. S. Almeida | Quasi-normal modes of bumblebee wormhole | 14 pages, 10 figures | null | 10.1088/1361-6382/ab1873 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we calculate the quasi-normal frequencies from a bumblebee
traversable wormhole. The bumblebee wormhole model is based on the bumblebee
gravity, which exhibits a spontaneous Lorentz symmetry breaking. Supporting by
the Lorentz violation parameter $\lambda$, this model allows the fulfillment of
the flare... | [
{
"created": "Wed, 5 Dec 2018 03:17:21 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Oliveira",
"R.",
""
],
[
"Dantas",
"D. M.",
""
],
[
"Santos",
"Victor",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | In this work, we calculate the quasi-normal frequencies from a bumblebee traversable wormhole. The bumblebee wormhole model is based on the bumblebee gravity, which exhibits a spontaneous Lorentz symmetry breaking. Supporting by the Lorentz violation parameter $\lambda$, this model allows the fulfillment of the flare-o... |
2201.00141 | Muhammad Sharif | M. Sharif and Amal Majid | Isotropization and Complexity of Decoupled Solutions in Self-interacting
Brans-Dicke Gravity | 26 pages, 10 figures, to appear in EPJP | Eur. Phys. J. Plus 137(2022)114 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this work is to formulate two new solutions by decoupling the
field equations via a minimal geometric deformation in the context of
self-interacting Brans-Dicke gravity. We introduce an extra source in the
anisotropic fluid distribution to generate new analogs of existing solutions.
The radial metric funct... | [
{
"created": "Sat, 1 Jan 2022 07:40:24 GMT",
"version": "v1"
}
] | 2022-01-14 | [
[
"Sharif",
"M.",
""
],
[
"Majid",
"Amal",
""
]
] | The aim of this work is to formulate two new solutions by decoupling the field equations via a minimal geometric deformation in the context of self-interacting Brans-Dicke gravity. We introduce an extra source in the anisotropic fluid distribution to generate new analogs of existing solutions. The radial metric functio... |
1103.4172 | Patrizia Vitale | Patrizia Vitale | A field-theoretic approach to Spin Foam models in Quantum Gravity | 16 pages, 3 figures. Proceedings of the Workshop on Non Commutative
Field Theory and Gravity, September 8-12, 2010 Corfu Greece | PoS CNCFG2010:032,2011 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an introduction to Group Field Theory models, motivating them on
the basis of their relationship with discretized BF models of gravity. We
derive the Feynmann rules and compute quantum corrections in the coherent
states basis.
| [
{
"created": "Mon, 21 Mar 2011 22:53:39 GMT",
"version": "v1"
}
] | 2011-05-18 | [
[
"Vitale",
"Patrizia",
""
]
] | We present an introduction to Group Field Theory models, motivating them on the basis of their relationship with discretized BF models of gravity. We derive the Feynmann rules and compute quantum corrections in the coherent states basis. |
2211.11017 | Vaibhav Kalvakota | Vaibhav Kalvakota | Weyl entropy behaviour and Naked Singularities | Based on presentation to be given at the 32nd meeting of the Indian
Association for General Relativity and Gravitation, IISER Kolkata | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In order to show that there exists a relation between the validity of the
Weyl entropy and the cosmic censorship hypothesis, we discuss the relation
between naked singularities and the gravitational entropy estimator using the
Weyl invariant. We look at the examples of Vaidya and Tolman-Bondi spacetimes
in asymptotic... | [
{
"created": "Sun, 20 Nov 2022 16:37:03 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"Kalvakota",
"Vaibhav",
""
]
] | In order to show that there exists a relation between the validity of the Weyl entropy and the cosmic censorship hypothesis, we discuss the relation between naked singularities and the gravitational entropy estimator using the Weyl invariant. We look at the examples of Vaidya and Tolman-Bondi spacetimes in asymptotical... |
2209.05043 | Mohammad M. Sheikh-Jabbari | M.M. Sheikh-Jabbari | On Symplectic Form for Null Boundary Phase Space | 9 pages, 1 figure. Prepared in memory of Prof. T. Padmanabhan, to
appear in the Topical Collection (TC) of General Relativity and Gravitation
(GERG) | null | 10.1007/s10714-022-02997-2 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | To formulate gravity in spacetimes bounded by a null boundary, an arbitrary
hypothetical null surface, boundary degrees of freedom (d.o.f) should be added
to account for the d.o.f and dynamics in the spacetime regions excised behind
the null boundary. In the D dimensional example, boundary d.o.f are labelled by
D cha... | [
{
"created": "Mon, 12 Sep 2022 06:48:49 GMT",
"version": "v1"
}
] | 2022-11-16 | [
[
"Sheikh-Jabbari",
"M. M.",
""
]
] | To formulate gravity in spacetimes bounded by a null boundary, an arbitrary hypothetical null surface, boundary degrees of freedom (d.o.f) should be added to account for the d.o.f and dynamics in the spacetime regions excised behind the null boundary. In the D dimensional example, boundary d.o.f are labelled by D charg... |
1210.5396 | Yungui Gong | Yungui Gong | Observational constraints on massive gravity | corrected an error in Fig. 2b | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ghost free massive gravity modified Friedmann equations at cosmic scale
and provided an explanation of cosmic acceleration without dark energy. We
analyzed the cosmological solutions of the massive gravity in detail and
confronted the cosmological model with current observational data. We found
that the model par... | [
{
"created": "Fri, 19 Oct 2012 12:26:16 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Nov 2021 11:06:40 GMT",
"version": "v2"
}
] | 2021-11-30 | [
[
"Gong",
"Yungui",
""
]
] | The ghost free massive gravity modified Friedmann equations at cosmic scale and provided an explanation of cosmic acceleration without dark energy. We analyzed the cosmological solutions of the massive gravity in detail and confronted the cosmological model with current observational data. We found that the model param... |
2101.09956 | Tiberiu Harko | Jin-Zhao Yang, Shahab Shahidi, Tiberiu Harko, Shi-Dong Liang | Geodesic deviation, Raychaudhuri equation, Newtonian limit, and tidal
forces in Weyl-type $f(Q,T)$ gravity | 18 pages, no figures, accepted for publication in EPJC; minor
corrections; references added | null | 10.1140/epjc/s10052-021-08910-6 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the geodesic deviation equation, describing the relative
accelerations of nearby particles, and the Raychaudhuri equation, giving the
evolution of the kinematical quantities associated with deformations
(expansion, shear and rotation) in the Weyl type $f(Q,T)$ gravity, in which the
nonmetricity $Q$ is rep... | [
{
"created": "Mon, 25 Jan 2021 08:54:34 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Jan 2021 16:36:53 GMT",
"version": "v2"
}
] | 2021-02-24 | [
[
"Yang",
"Jin-Zhao",
""
],
[
"Shahidi",
"Shahab",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Liang",
"Shi-Dong",
""
]
] | We consider the geodesic deviation equation, describing the relative accelerations of nearby particles, and the Raychaudhuri equation, giving the evolution of the kinematical quantities associated with deformations (expansion, shear and rotation) in the Weyl type $f(Q,T)$ gravity, in which the nonmetricity $Q$ is repre... |
gr-qc/9904054 | Takeshi Chiba | Takeshi Chiba | Apparent Horizon Formation and Hoop Conjecture in Non-axisymmetric
Spaces | 18 pages, typos fixed, to be published in Phys.Rev.D | Phys.Rev.D60:044003,1999; Erratum-ibid.D60:089902,1999 | 10.1103/PhysRevD.60.044003 10.1103/PhysRevD.60.089902 | null | gr-qc | null | We investigate the validity of Thorne's hoop conjecture in non-axisymmetric
spacetimes by examining the formation of apparent horizons numerically. If
spaces have a discrete symmetry about one axis, we can specify the boundary
conditions to determine an apparent horizon even in non-axisymmetric spaces. We
implement, ... | [
{
"created": "Wed, 21 Apr 1999 08:14:31 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jul 1999 09:52:59 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Chiba",
"Takeshi",
""
]
] | We investigate the validity of Thorne's hoop conjecture in non-axisymmetric spacetimes by examining the formation of apparent horizons numerically. If spaces have a discrete symmetry about one axis, we can specify the boundary conditions to determine an apparent horizon even in non-axisymmetric spaces. We implement, fo... |
1707.03867 | Sergio Gimeno-Soler | Sergio Gimeno-Soler and Jos\'e A. Font | Magnetised Polish doughnuts revisited | 9 pages, 6 figures. Accepted for publication in Astronomy &
Astrophysics July 12, 2017 | A&A 607, A68 (2017) | 10.1051/0004-6361/201730935 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a procedure to build new sequences of magnetised, equilibrium tori
around Kerr black holes which combines two approaches previously considered in
the literature. For simplicity we assume that the test-fluid approximation
holds, and hence we neglect the self-gravity of the fluid. The models are built
assumi... | [
{
"created": "Wed, 12 Jul 2017 18:58:35 GMT",
"version": "v1"
}
] | 2017-11-15 | [
[
"Gimeno-Soler",
"Sergio",
""
],
[
"Font",
"José A.",
""
]
] | We discuss a procedure to build new sequences of magnetised, equilibrium tori around Kerr black holes which combines two approaches previously considered in the literature. For simplicity we assume that the test-fluid approximation holds, and hence we neglect the self-gravity of the fluid. The models are built assuming... |
gr-qc/0605070 | Sunil Maharaj | S. Hansraj and S. D. Maharaj | Charged analogue of Finch-Skea stars | 17 pages, To appear in Int. J. Mod. Phys. D | Int.J.Mod.Phys.D15:1311-1327,2006 | 10.1142/S0218271806008826 | null | gr-qc | null | We present solutions to the Einstein-Maxwell system of equations in
spherically symmetric gravitational fields for static interior spacetimes with
a specified form of the electric field intensity. The condition of pressure
isotropy yields three category of solutions. The first category is expressible
in terms of elem... | [
{
"created": "Thu, 11 May 2006 13:59:30 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Hansraj",
"S.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We present solutions to the Einstein-Maxwell system of equations in spherically symmetric gravitational fields for static interior spacetimes with a specified form of the electric field intensity. The condition of pressure isotropy yields three category of solutions. The first category is expressible in terms of elemen... |
gr-qc/0407072 | Irina Dymnikova | Irina Dymnikova | Regular electrically charged structures in Nonlinear Electrodynamics
coupled to General Relativity | two references added concerning effective photon space-time | Class.Quant.Grav.21:4417-4429,2004 | 10.1088/0264-9381/21/18/009 | null | gr-qc | null | We address the question of existence of regular spherically symmetric
electrically charged solutions in Nonlinear Electrodynamics coupled to General
Relativity. Stress-energy tensor of the electromagnetic field has the algebraic
structure $T_0^0=T_1^1$. In this case the Weak Energy Condition leads to the de
Sitter as... | [
{
"created": "Mon, 19 Jul 2004 11:21:36 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 2004 10:51:38 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Aug 2004 08:05:53 GMT",
"version": "v3"
}
] | 2011-07-19 | [
[
"Dymnikova",
"Irina",
""
]
] | We address the question of existence of regular spherically symmetric electrically charged solutions in Nonlinear Electrodynamics coupled to General Relativity. Stress-energy tensor of the electromagnetic field has the algebraic structure $T_0^0=T_1^1$. In this case the Weak Energy Condition leads to the de Sitter asym... |
1012.0505 | Alfredo Sandoval-Villalbazo | D. Brun-Battistini and A. Sandoval-Villalbazo | Light Cone analysis of relativistic first-order in the gradients
hydrodynamics | 6 pages, no figures | AIP Conf. Proc. 1312 57 AIP Conference Proceedings 1312 AIP
Conference Proceedings 1312 AIP Conference Proceedings 1312 AIP Conference
Proceedings 1312 AIP Conference Proceedings 1312 AIP Conference proceedings,
1312, 57-63 (2010) | 10.1063/1.3533207 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work applies a Rayleigh-Brillouin light spectrum analysis in order to
establish a causality test by means of a frequency cone. This technique allows
to identify forbidden and unforbidden regions in light scattering experiments
and establishes if a set of linearized transport equations admits causal
solutions. It... | [
{
"created": "Thu, 2 Dec 2010 17:13:32 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Brun-Battistini",
"D.",
""
],
[
"Sandoval-Villalbazo",
"A.",
""
]
] | This work applies a Rayleigh-Brillouin light spectrum analysis in order to establish a causality test by means of a frequency cone. This technique allows to identify forbidden and unforbidden regions in light scattering experiments and establishes if a set of linearized transport equations admits causal solutions. It i... |
gr-qc/0603072 | R. M. Kiehn | R. M. Kiehn | Thermodynamics and quantum cosmology -- Continuous topological evolution
of topologically coherent defects | 57 pages | null | null | null | gr-qc | null | As a point of departure it is suggested that Quantum Cosmology is a
topological concept independent from metrical constraints. Methods of
continuous topological evolution and topological thermodynamics are used to
construct a cosmological model of the present universe, using the techniques
based upon Cartan's theory ... | [
{
"created": "Fri, 17 Mar 2006 18:22:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kiehn",
"R. M.",
""
]
] | As a point of departure it is suggested that Quantum Cosmology is a topological concept independent from metrical constraints. Methods of continuous topological evolution and topological thermodynamics are used to construct a cosmological model of the present universe, using the techniques based upon Cartan's theory of... |
1706.01173 | Yun Soo Myung | Yun Soo Myung | Renormalizability, vDVZ discontinuity and Newtonian singularity in
higher-derivative gravity | 15 pages, no figures,version to appear in PRD | Phys. Rev. D 96, 064026 (2017) | 10.1103/PhysRevD.96.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was proposed that if a higher-derivative gravity is renormalizable, it
implies necessarily a finite Newtonian potential at the origin, but the reverse
of this statement is not true. Here we show that the reverse is true when
taking into account the vDVZ discontinuity which states that the theory
obtained from mass... | [
{
"created": "Mon, 5 Jun 2017 01:18:02 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2017 03:16:26 GMT",
"version": "v2"
}
] | 2017-09-20 | [
[
"Myung",
"Yun Soo",
""
]
] | It was proposed that if a higher-derivative gravity is renormalizable, it implies necessarily a finite Newtonian potential at the origin, but the reverse of this statement is not true. Here we show that the reverse is true when taking into account the vDVZ discontinuity which states that the theory obtained from massiv... |
gr-qc/0309065 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation, Fall 2003 | 26 pages, LaTex, 2 figures, with html.sty and psfig.sty | null | null | MOG-22 | gr-qc | null | Contents:
Community news:
- We hear that... by Jorge Pullin
Research briefs:
- Update on a busy year for LIGO, by Stan Whitcomb
- First year results from WMAP, by Rachel Bean
- Short range searches for non-Newtonian gravity, by M. Varney and J. Long
Conference reports:
- Xth Brazilian school of cosmol... | [
{
"created": "Mon, 15 Sep 2003 18:52:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pullin",
"Jorge",
""
]
] | Contents: Community news: - We hear that... by Jorge Pullin Research briefs: - Update on a busy year for LIGO, by Stan Whitcomb - First year results from WMAP, by Rachel Bean - Short range searches for non-Newtonian gravity, by M. Varney and J. Long Conference reports: - Xth Brazilian school of cosmology and gravitatio... |
1505.06215 | Ivan Arraut Dr. | Ivan Arraut | The dynamical origin of the graviton mass in the non-linear theory of
massive gravity | Published version, new section added | Universe 2019, 5(7), 166 | 10.3390/universe5070166 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare the standard Higgs mechanism corresponding to the scalar field,
with the dynamical origin of the graviton mass inside the scenario of the dRGT
theory of massive gravity. We demonstrate that the effective mass perceived
locally by different observers, depends on the way how they define the local
time with r... | [
{
"created": "Sun, 24 May 2015 16:59:31 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jul 2015 14:22:08 GMT",
"version": "v2"
},
{
"created": "Tue, 31 May 2016 15:34:03 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Jul 2019 00:56:38 GMT",
"version": "v4"
}
] | 2019-07-09 | [
[
"Arraut",
"Ivan",
""
]
] | We compare the standard Higgs mechanism corresponding to the scalar field, with the dynamical origin of the graviton mass inside the scenario of the dRGT theory of massive gravity. We demonstrate that the effective mass perceived locally by different observers, depends on the way how they define the local time with res... |
gr-qc/0110008 | Hisaaki Shinkai | Hisa-aki Shinkai (RIKEN) and Gen Yoneda (Waseda U.) | Adjusted ADM systems and their expected stability properties: constraint
propagation analysis in Schwarzschild spacetime | 23 pages, RevTeX4, many figures. Revised version. Added subtitle,
reduced figures, rephrased introduction, and a native checked. :-) | Class.Quant.Grav.19:1027-1050,2002 | 10.1088/0264-9381/19/6/302 | null | gr-qc | null | In order to find a way to have a better formulation for numerical evolution
of the Einstein equations, we study the propagation equations of the
constraints based on the Arnowitt-Deser-Misner formulation. By adjusting
constraint terms in the evolution equations, we try to construct an
"asymptotically constrained syst... | [
{
"created": "Mon, 1 Oct 2001 00:38:48 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jan 2002 02:02:40 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Shinkai",
"Hisa-aki",
"",
"RIKEN"
],
[
"Yoneda",
"Gen",
"",
"Waseda U."
]
] | In order to find a way to have a better formulation for numerical evolution of the Einstein equations, we study the propagation equations of the constraints based on the Arnowitt-Deser-Misner formulation. By adjusting constraint terms in the evolution equations, we try to construct an "asymptotically constrained system... |
1207.5837 | Andr\'as L\'aszl\'o | Peter Csizmadia, Andras Laszlo, Istvan Racz | On the Use of Multipole Expansion in Time Evolution of Non-linear
Dynamical Systems and Some Surprises Related to Superradiance | 49 pages, 11 figures | Class. Quantum Grav. 30 (2013) 015010 | 10.1088/0264-9381/30/1/015010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new numerical method is introduced to study the problem of time evolution
of generic non-linear dynamical systems in four-dimensional spacetimes. It is
assumed that the time level surfaces are foliated by a one-parameter family of
codimension two compact surfaces with no boundary and which are conformal to a
Rieman... | [
{
"created": "Tue, 24 Jul 2012 21:49:17 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Dec 2012 17:51:50 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Csizmadia",
"Peter",
""
],
[
"Laszlo",
"Andras",
""
],
[
"Racz",
"Istvan",
""
]
] | A new numerical method is introduced to study the problem of time evolution of generic non-linear dynamical systems in four-dimensional spacetimes. It is assumed that the time level surfaces are foliated by a one-parameter family of codimension two compact surfaces with no boundary and which are conformal to a Riemanni... |
1408.0044 | Brien C. Nolan | Brien C. Nolan | Particle and photon orbits in McVittie spacetimes | 26 pages, 12 figures | null | 10.1088/0264-9381/31/23/235008 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | McVittie spacetimes represent an embedding of the Schwarzschild field in
isotropic cosmological backgrounds. Depending on the scale factor of the
background, the resulting spacetime may contain black and white hole horizons,
as well as other interesting boundary features. In order to further clarify the
nature of the... | [
{
"created": "Thu, 31 Jul 2014 23:33:28 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Nolan",
"Brien C.",
""
]
] | McVittie spacetimes represent an embedding of the Schwarzschild field in isotropic cosmological backgrounds. Depending on the scale factor of the background, the resulting spacetime may contain black and white hole horizons, as well as other interesting boundary features. In order to further clarify the nature of these... |
2404.06552 | Cristian Martinez | Mat\'ias Brice\~no, Cristi\'an Mart\'inez and Jorge Zanelli | On the central singularity of the BTZ geometries | 22 pages, 2 figures, 1 table | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The nature of the central singularity of the BTZ geometries -- stationary
vacuum solutions of 2+1 gravity with negative cosmological constant
$\Lambda=-\ell^{-2}$ and $SO(2)\times \mathbb{R}$ isometry -- is discussed. The
essential tool for this analysis is the holonomy operator on a closed path
(i.e., Wilson loop) a... | [
{
"created": "Tue, 9 Apr 2024 18:05:11 GMT",
"version": "v1"
}
] | 2024-04-11 | [
[
"Briceño",
"Matías",
""
],
[
"Martínez",
"Cristián",
""
],
[
"Zanelli",
"Jorge",
""
]
] | The nature of the central singularity of the BTZ geometries -- stationary vacuum solutions of 2+1 gravity with negative cosmological constant $\Lambda=-\ell^{-2}$ and $SO(2)\times \mathbb{R}$ isometry -- is discussed. The essential tool for this analysis is the holonomy operator on a closed path (i.e., Wilson loop) aro... |
2008.08924 | Feiyu Yao | Feiyu Yao, Jun Tao | Extended Phase Space Thermodynamics for Dyonic Black Holes with a Power
Maxwell Field | arXiv admin note: text overlap with arXiv:1808.04506 | null | null | CTP-SCU/2020027 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamics of dyonic black holes with
the presence of power Maxwell electromagnetic field in the extended phase
space, which includes the cosmological constant $\Lambda$ as a thermodynamic
variable. For a generic power Maxwell black hole with the electric charge and
magnetic char... | [
{
"created": "Wed, 19 Aug 2020 02:31:33 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Aug 2020 09:36:22 GMT",
"version": "v2"
}
] | 2020-09-01 | [
[
"Yao",
"Feiyu",
""
],
[
"Tao",
"Jun",
""
]
] | In this paper, we investigate the thermodynamics of dyonic black holes with the presence of power Maxwell electromagnetic field in the extended phase space, which includes the cosmological constant $\Lambda$ as a thermodynamic variable. For a generic power Maxwell black hole with the electric charge and magnetic charge... |
1911.11027 | Justin Ripley | Justin L. Ripley, Frans Pretorius | Scalarized Black Hole dynamics in Einstein dilaton Gauss-Bonnet Gravity | updated for journal version | Phys. Rev. D 101, 044015 (2020) | 10.1103/PhysRevD.101.044015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on a numerical investigation of the stability of scalarized black
holes in Einstein dilaton Gauss-Bonnet (EdGB) gravity in the full dynamical
theory, though restricted to spherical symmetry. We find evidence that for
sufficiently small curvature-couplings the resulting scalarized black hole
solutions are no... | [
{
"created": "Mon, 25 Nov 2019 16:22:44 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2020 16:31:21 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"Ripley",
"Justin L.",
""
],
[
"Pretorius",
"Frans",
""
]
] | We report on a numerical investigation of the stability of scalarized black holes in Einstein dilaton Gauss-Bonnet (EdGB) gravity in the full dynamical theory, though restricted to spherical symmetry. We find evidence that for sufficiently small curvature-couplings the resulting scalarized black hole solutions are nonl... |
2302.06400 | Anna M. Nobili | Anna M. Nobili, Alberto Anselmi | On the first test of the Weak Equivalence Principle in low Earth orbit | 12 pages, 3 figures | null | null | null | gr-qc astro-ph.IM physics.ins-det | http://creativecommons.org/licenses/by/4.0/ | The Weak Equivalence Principle is the founding pillar of General Relativity
and as such should be verified as precisely as possible. The Microscope
experiment tested it in low Earth orbit, finding that Pt and Ti test masses
fall toward Earth with the same acceleration to about 1e-15, an improvement of
about two order... | [
{
"created": "Mon, 13 Feb 2023 14:37:46 GMT",
"version": "v1"
},
{
"created": "Wed, 3 May 2023 17:00:54 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Apr 2024 21:12:43 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Jun 2024 22:46:26 GMT",
"version": "v4"
}
] | 2024-06-17 | [
[
"Nobili",
"Anna M.",
""
],
[
"Anselmi",
"Alberto",
""
]
] | The Weak Equivalence Principle is the founding pillar of General Relativity and as such should be verified as precisely as possible. The Microscope experiment tested it in low Earth orbit, finding that Pt and Ti test masses fall toward Earth with the same acceleration to about 1e-15, an improvement of about two orders ... |
gr-qc/9805021 | Leonardo Palacios | L. Palacios and J.F. Plebanski | A note on the iterative approach to twisting type N solutions | 9 pages, Tex file; corrected typos, some rephrasing and added
reference | null | null | CINVESTAV CIEA-FIS-30/98, Ecole Polytechnique CPHT-S6110598 | gr-qc | null | We present the results of the computation of a twisting type N solution to
vacuum Einstein equations following an iterative approach. Our results show
that the higher order terms fail to provide a full exact solution with
non-vanishing twist. Nevertheless, our fourth-order solution still represents a
regular and twis... | [
{
"created": "Thu, 7 May 1998 10:16:31 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 1998 13:57:50 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Palacios",
"L.",
""
],
[
"Plebanski",
"J. F.",
""
]
] | We present the results of the computation of a twisting type N solution to vacuum Einstein equations following an iterative approach. Our results show that the higher order terms fail to provide a full exact solution with non-vanishing twist. Nevertheless, our fourth-order solution still represents a regular and twisti... |
2306.17847 | Adam Pound | Andrew Spiers, Adam Pound, Barry Wardell | Second-order perturbations of the Schwarzschild spacetime: practical,
covariant and gauge-invariant formalisms | 41 pages. v2 contains additional material and corrects minor errors.
v3 corrects additional minor errors. v4 makes minor changes in response to
referee comments | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | High-accuracy gravitational-wave modeling demands going beyond linear,
first-order perturbation theory. Particularly motivated by the need for
second-order perturbative models of extreme-mass-ratio inspirals and black hole
ringdowns, we present practical spherical-harmonic decompositions of the
Einstein equation, Reg... | [
{
"created": "Fri, 30 Jun 2023 17:59:22 GMT",
"version": "v1"
},
{
"created": "Sun, 12 May 2024 19:20:02 GMT",
"version": "v2"
},
{
"created": "Thu, 16 May 2024 18:38:07 GMT",
"version": "v3"
},
{
"created": "Thu, 4 Jul 2024 12:08:25 GMT",
"version": "v4"
}
] | 2024-07-08 | [
[
"Spiers",
"Andrew",
""
],
[
"Pound",
"Adam",
""
],
[
"Wardell",
"Barry",
""
]
] | High-accuracy gravitational-wave modeling demands going beyond linear, first-order perturbation theory. Particularly motivated by the need for second-order perturbative models of extreme-mass-ratio inspirals and black hole ringdowns, we present practical spherical-harmonic decompositions of the Einstein equation, Regge... |
2012.07022 | Zezhou Hu | Zezhou Hu, Zhen Zhong, Peng-Cheng Li, Minyong Guo, Bin Chen | QED Effect on Black Hole Shadow | 27 pages and 14 figures, some references added | Phys. Rev. D 103, 044057 (2021) | 10.1103/PhysRevD.103.044057 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, taking the QED effect into account, we investigate the shadows
of the static black hole with magnetic monopoles and neutral black holes in
magnetic fields through the numerical backward ray-tracing method. For a static
black holes with magnetic monopole, we obtain the relation between the shadow
radius ... | [
{
"created": "Sun, 13 Dec 2020 10:23:33 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Dec 2020 14:08:05 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Hu",
"Zezhou",
""
],
[
"Zhong",
"Zhen",
""
],
[
"Li",
"Peng-Cheng",
""
],
[
"Guo",
"Minyong",
""
],
[
"Chen",
"Bin",
""
]
] | In this work, taking the QED effect into account, we investigate the shadows of the static black hole with magnetic monopoles and neutral black holes in magnetic fields through the numerical backward ray-tracing method. For a static black holes with magnetic monopole, we obtain the relation between the shadow radius an... |
1201.1738 | Naoki Tsukamoto | Naoki Tsukamoto, Tomohiro Harada | A No-Go Theorem for Rotating Stars of a Perfect Fluid without Radial
Motion in Projectable Ho\v{r}ava--Lifshitz Gravity | 18 pages, no figures, minor correction, title changed, accepted for
publication in Galaxies | Galaxies 1, 261 (2013) | 10.3390/galaxies1030261 | RUP-11-5 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ho\v{r}ava--Lifshitz gravity has covariance only under the
foliation-preserving diffeomorphism. This implies that the quantities on the
constant-time hypersurfaces should be regular. In the original theory, the
projectability condition, which strongly restricts the lapse function, is
proposed. We assume that a star i... | [
{
"created": "Mon, 9 Jan 2012 11:17:52 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Dec 2013 16:02:32 GMT",
"version": "v2"
}
] | 2013-12-18 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Harada",
"Tomohiro",
""
]
] | Ho\v{r}ava--Lifshitz gravity has covariance only under the foliation-preserving diffeomorphism. This implies that the quantities on the constant-time hypersurfaces should be regular. In the original theory, the projectability condition, which strongly restricts the lapse function, is proposed. We assume that a star is ... |
gr-qc/0306085 | Reinaldo J. Gleiser | Reinaldo J. Gleiser and Alfredo E. Dominguez (FaMAF, Universidad
Nacional de Cordoba, Argentina) | A gravitational memory effect in "boosted" black hole perturbation
theory | REVTexIV, 15 pages, 2 EPS figures | Phys.Rev. D68 (2003) 104018 | 10.1103/PhysRevD.68.104018 | null | gr-qc | null | Black hole perturbation theory, or more generally, perturbation theory on a
Schwarzschild bockground, has been applied in several contexts, but usually
under the simplifying assumption that the ADM momentum vanishes, namely, that
the evolution is carried out and observed in the ``center of momentum frame''.
In this p... | [
{
"created": "Wed, 18 Jun 2003 17:58:33 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Gleiser",
"Reinaldo J.",
"",
"FaMAF, Universidad\n Nacional de Cordoba, Argentina"
],
[
"Dominguez",
"Alfredo E.",
"",
"FaMAF, Universidad\n Nacional de Cordoba, Argentina"
]
] | Black hole perturbation theory, or more generally, perturbation theory on a Schwarzschild bockground, has been applied in several contexts, but usually under the simplifying assumption that the ADM momentum vanishes, namely, that the evolution is carried out and observed in the ``center of momentum frame''. In this pap... |
1209.2619 | Qiang Xu | Qiang Xu, Sheng-yu Tan | Singularity problem in f(R) model with non-minimal coupling | 13 pages, 4 figures | Phys. Rev. D 86, 123526 (2012) | 10.1103/PhysRevD.86.123526 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the non-minimal coupling between matter and the geometry in the
f(R) theory. In the new theory which we established, a new scalar $\psi$ has
been defined and we give it a certain stability condition. We intend to take a
closer look at the dark energy oscillating behavior in the de-Sitter universe
and the ... | [
{
"created": "Wed, 12 Sep 2012 14:15:41 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Sep 2012 01:02:51 GMT",
"version": "v2"
},
{
"created": "Sun, 16 Sep 2012 10:32:18 GMT",
"version": "v3"
}
] | 2013-05-30 | [
[
"Xu",
"Qiang",
""
],
[
"Tan",
"Sheng-yu",
""
]
] | We consider the non-minimal coupling between matter and the geometry in the f(R) theory. In the new theory which we established, a new scalar $\psi$ has been defined and we give it a certain stability condition. We intend to take a closer look at the dark energy oscillating behavior in the de-Sitter universe and the ma... |
2209.11594 | Stefano Foffa | Gabriel Luz Almeida, Stefano Foffa and Riccardo Sturani | Gravitational radiation contributions to the two-body scattering angle | 13 pages, 1 figure, final version published on PRD | null | 10.1103/PhysRevD.107.024020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the contribution to the two-body scattering angle of a specific
class of interactions involving the exchange of gravitational radiative degrees
of freedom, including the nonlinear memory process and square of radiation
reaction effects. Our computation is performed directly from the equations of
motion, th... | [
{
"created": "Fri, 23 Sep 2022 13:56:52 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jan 2023 08:26:53 GMT",
"version": "v2"
}
] | 2023-02-01 | [
[
"Almeida",
"Gabriel Luz",
""
],
[
"Foffa",
"Stefano",
""
],
[
"Sturani",
"Riccardo",
""
]
] | We compute the contribution to the two-body scattering angle of a specific class of interactions involving the exchange of gravitational radiative degrees of freedom, including the nonlinear memory process and square of radiation reaction effects. Our computation is performed directly from the equations of motion, thus... |
1008.5167 | Philippe G. LeFloch | James D.E. Grant and Philippe G. LeFloch | Null injectivity estimate under an upper bound on the curvature | 19 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish a uniform estimate for the injectivity radius of the past null
cone of a point in a general Lorentzian manifold foliated by spacelike
hypersurfaces and satisfying an upper curvature bound. Precisely, our main
assumptions are, on one hand, upper bounds on the null curvature of the
spacetime and the lapse ... | [
{
"created": "Mon, 30 Aug 2010 21:06:53 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Apr 2011 01:22:53 GMT",
"version": "v2"
},
{
"created": "Tue, 31 May 2011 06:19:27 GMT",
"version": "v3"
}
] | 2011-06-01 | [
[
"Grant",
"James D. E.",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We establish a uniform estimate for the injectivity radius of the past null cone of a point in a general Lorentzian manifold foliated by spacelike hypersurfaces and satisfying an upper curvature bound. Precisely, our main assumptions are, on one hand, upper bounds on the null curvature of the spacetime and the lapse fu... |
0911.4068 | Christopher Duston | Christopher L Duston | Exotic Smoothness in Four Dimensions and Euclidean Quantum Gravity | 20 pages, 1 figure | Int.J.Geom.Meth.Mod.Phys.08:459-484,2011 | 10.1142/S0219887811005233 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we calculate the effect of the inclusion of exotic smooth
structures on typical observables in Euclidean quantum gravity. We do this in
the semiclassical regime for several gravitational free-field actions and find
that the results are similar, independent of the particular action that is
chosen. These ... | [
{
"created": "Fri, 20 Nov 2009 15:39:43 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2010 19:07:25 GMT",
"version": "v2"
}
] | 2013-08-13 | [
[
"Duston",
"Christopher L",
""
]
] | In this paper we calculate the effect of the inclusion of exotic smooth structures on typical observables in Euclidean quantum gravity. We do this in the semiclassical regime for several gravitational free-field actions and find that the results are similar, independent of the particular action that is chosen. These ar... |
1801.08955 | Grigoris Panotopoulos | Kyriakos Destounis, Grigoris Panotopoulos, \'Angel Rincon | Stability under scalar perturbations and quasinormal modes of 4D
Einstein-Born-Infeld dilaton spacetime: Exact spectrum | Minor corrections | null | 10.1140/epjc/s10052-018-5576-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability under scalar perturbations, and we compute the
quasinormal modes of the Einstein-Born-Infeld dilaton spacetime in 1+3
dimensions. Solving the full radial equation in terms of hypergeometric
functions, we provide an exact analytical expression for the spectrum. We find
that the frequencies are p... | [
{
"created": "Fri, 26 Jan 2018 19:39:02 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Apr 2018 19:23:42 GMT",
"version": "v2"
}
] | 2018-08-29 | [
[
"Destounis",
"Kyriakos",
""
],
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincon",
"Ángel",
""
]
] | We study the stability under scalar perturbations, and we compute the quasinormal modes of the Einstein-Born-Infeld dilaton spacetime in 1+3 dimensions. Solving the full radial equation in terms of hypergeometric functions, we provide an exact analytical expression for the spectrum. We find that the frequencies are pur... |
1304.0778 | Ernesto Contreras | Ernesto Contreras and Lorenzo Leal | Abelian Ashtekar formulation from the ADM action | 13 pages | International Journal of Modern Physics D Vol. 23, No. 5 (2014)
1450047 | 10.1142/S0218271814500473 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Ashtekar formulation of linear gravity starting from the ADM
first order action for the non linear theory, linearizing it, and performing a
canonical transformation that coordinatizes the phase space in terms of the
already linearized Ashtekar variables. The results obtained in this way are in
accordance... | [
{
"created": "Tue, 2 Apr 2013 20:04:01 GMT",
"version": "v1"
}
] | 2019-04-01 | [
[
"Contreras",
"Ernesto",
""
],
[
"Leal",
"Lorenzo",
""
]
] | We study the Ashtekar formulation of linear gravity starting from the ADM first order action for the non linear theory, linearizing it, and performing a canonical transformation that coordinatizes the phase space in terms of the already linearized Ashtekar variables. The results obtained in this way are in accordance w... |
2310.04324 | Angel Rincon | Raul Carrasco, Angel Rincon, Joel Saavedra and Nelson Videla | Discriminating interacting dark energy models using Statefinder
diagnostic | 37 pages, 19 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we perform a comparative study of different interacting
dark energy (DE) models using the Statefinder diagnostics. In particular, 17
different forms of the energy transfer rate $Q$ between DE and dark matter (DM)
were focused on, belonging to the following categories: i) linear models in
energy d... | [
{
"created": "Fri, 6 Oct 2023 15:34:56 GMT",
"version": "v1"
}
] | 2023-10-09 | [
[
"Carrasco",
"Raul",
""
],
[
"Rincon",
"Angel",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Videla",
"Nelson",
""
]
] | In the present work, we perform a comparative study of different interacting dark energy (DE) models using the Statefinder diagnostics. In particular, 17 different forms of the energy transfer rate $Q$ between DE and dark matter (DM) were focused on, belonging to the following categories: i) linear models in energy den... |
1309.5020 | Abraham Harte | Abraham I. Harte | Tails of plane wave spacetimes: Wave-wave scattering in general
relativity | 13 pages, 1 figure, minor typos corrected | Phys. Rev. D 88, 084059 (2013) | 10.1103/PhysRevD.88.084059 | AEI-2013-251 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the most important characteristics of light in flat spacetime is that
it satisfies Huygens' principle: Initial data for the vacuum Maxwell equations
evolves sharply along null (and not timelike) geodesics. In flat spacetime,
there are no tails which linger behind expanding wavefronts. Tails generically
do exis... | [
{
"created": "Thu, 19 Sep 2013 15:25:10 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Oct 2013 14:36:28 GMT",
"version": "v2"
}
] | 2013-11-13 | [
[
"Harte",
"Abraham I.",
""
]
] | One of the most important characteristics of light in flat spacetime is that it satisfies Huygens' principle: Initial data for the vacuum Maxwell equations evolves sharply along null (and not timelike) geodesics. In flat spacetime, there are no tails which linger behind expanding wavefronts. Tails generically do exist,... |
1207.0047 | Naoki Tsukamoto | Naoki Tsukamoto, Tomohiro Harada and Kohji Yajima | Can we distinguish between black holes and wormholes by their
Einstein-ring systems? | 13 pages, 2 figures, minor changes from v2 | Phys Rev. D 86, 104062 (2012) | 10.1103/PhysRevD.86.104062 | RUP-12-5 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/3.0/ | For the last decade, the gravitational lensing in the strong gravitational
field has been studied eagerly. It is well known that, for the lensing by a
black hole, infinite number of Einstein rings are formed by the light rays
which wind around the black hole nearly on the photon sphere, which are called
relativistic ... | [
{
"created": "Sat, 30 Jun 2012 04:55:30 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Oct 2012 11:34:26 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Dec 2012 07:58:31 GMT",
"version": "v3"
}
] | 2012-12-07 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Yajima",
"Kohji",
""
]
] | For the last decade, the gravitational lensing in the strong gravitational field has been studied eagerly. It is well known that, for the lensing by a black hole, infinite number of Einstein rings are formed by the light rays which wind around the black hole nearly on the photon sphere, which are called relativistic Ei... |
2007.07889 | Jeremy Sakstein | Djuna Croon, Samuel D. McDermott, Jeremy Sakstein | Missing in Action: New Physics and the Black Hole Mass Gap | 16 pages, 10 figures | Phys. Rev. D 102, 115024 (2020) | 10.1103/PhysRevD.102.115024 | FERMILAB-PUB-20-328-T | gr-qc astro-ph.CO astro-ph.HE astro-ph.SR hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate the power of the black hole mass gap as a novel probe of
fundamental physics. New light particles that couple to the Standard Model can
act as an additional source of energy loss in the cores of population-III
stars, dramatically altering their evolution. We investigate the effects of two
paradigmatic ... | [
{
"created": "Wed, 15 Jul 2020 18:00:00 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Croon",
"Djuna",
""
],
[
"McDermott",
"Samuel D.",
""
],
[
"Sakstein",
"Jeremy",
""
]
] | We demonstrate the power of the black hole mass gap as a novel probe of fundamental physics. New light particles that couple to the Standard Model can act as an additional source of energy loss in the cores of population-III stars, dramatically altering their evolution. We investigate the effects of two paradigmatic we... |
gr-qc/0010042 | S. Shankaranarayanan | S. Shankaranarayanan, T. Padmanabhan and K. Srinivasan | Hawking radiation in different coordinate settings: Complex paths
approach | 18 pages, 2 figures, Uses IOP style file; final version; accepted in
Class. Quant. Grav | Class.Quant.Grav. 19 (2002) 2671-2688 | 10.1088/0264-9381/19/10/310 | null | gr-qc | null | We apply the technique of complex paths to obtain Hawking radiation in
different coordinate representations of the Schwarzschild space-time. The
coordinate representations we consider do not possess a singularity at the
horizon unlike the standard Schwarzschild coordinate. However, the event
horizon manifests itself ... | [
{
"created": "Wed, 11 Oct 2000 06:35:47 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2001 05:53:04 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Jun 2001 08:56:54 GMT",
"version": "v3"
},
{
"created": "Mon, 1 Apr 2002 17:09:48 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Shankaranarayanan",
"S.",
""
],
[
"Padmanabhan",
"T.",
""
],
[
"Srinivasan",
"K.",
""
]
] | We apply the technique of complex paths to obtain Hawking radiation in different coordinate representations of the Schwarzschild space-time. The coordinate representations we consider do not possess a singularity at the horizon unlike the standard Schwarzschild coordinate. However, the event horizon manifests itself as... |
1302.5013 | Pisin Chen | Mariam Bouhmadi-Lopez, Che-Yu Chen, Pisin Chen | Is Eddington-Born-Infeld theory really free of cosmological
singularities? | 5 pages | Eur. Phys. J. C (2014) 74:2802 | 10.1140/epjc/s10052-014-2802-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Eddington-inspired-Born-Infeld (EiBI) theory has been recently
resurrected. Such a theory is characterized by being equivalent to Einstein
theory in vacuum but differing from it in the presence of matter. One of the
virtues of the theory is to avoid the Big Bang singularity for a radiation
filled universe. In thi... | [
{
"created": "Wed, 20 Feb 2013 16:13:36 GMT",
"version": "v1"
}
] | 2014-05-26 | [
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | The Eddington-inspired-Born-Infeld (EiBI) theory has been recently resurrected. Such a theory is characterized by being equivalent to Einstein theory in vacuum but differing from it in the presence of matter. One of the virtues of the theory is to avoid the Big Bang singularity for a radiation filled universe. In this ... |
gr-qc/9901066 | Portnoy Jacob | E.I. Guendelman and Jacov Portnoy | The Universe out of an Elementary Particle? | null | Class.Quant.Grav.16:3315-3320,1999 | 10.1088/0264-9381/16/10/320 | null | gr-qc | null | We consider a model of an elementary particle as a 2 + 1 dimensional brane
evolving in a 3 + 1 dimensional space. Introducing gauge fields that live in
the brane as well as normal surface tension can lead to a stable "elementary
particle" configuration. Considering the possibility of non vanishing vacuum
energy insid... | [
{
"created": "Sun, 24 Jan 1999 09:05:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Guendelman",
"E. I.",
""
],
[
"Portnoy",
"Jacov",
""
]
] | We consider a model of an elementary particle as a 2 + 1 dimensional brane evolving in a 3 + 1 dimensional space. Introducing gauge fields that live in the brane as well as normal surface tension can lead to a stable "elementary particle" configuration. Considering the possibility of non vanishing vacuum energy inside ... |
1503.07860 | Christof Wetterich | C. Wetterich | Cosmic fluctuations from quantum effective action | Extended discussion, assertional references, 39 pages, 6 figures | Phys. Rev. D 92, 083507 (2015) | 10.1103/PhysRevD.92.083507 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Does the observable spectrum of cosmic fluctuations depend on detailed
initial conditions? This addresses the question if the general inflationary
paradigm is sufficient to predict within a given model the spectrum and
amplitude of cosmic fluctuations, or if additional particular assumptions about
the initial conditi... | [
{
"created": "Thu, 26 Mar 2015 15:33:53 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Sep 2015 16:58:02 GMT",
"version": "v2"
}
] | 2015-10-14 | [
[
"Wetterich",
"C.",
""
]
] | Does the observable spectrum of cosmic fluctuations depend on detailed initial conditions? This addresses the question if the general inflationary paradigm is sufficient to predict within a given model the spectrum and amplitude of cosmic fluctuations, or if additional particular assumptions about the initial condition... |
2401.06553 | Uddeepta Deka | Uddeepta Deka, Sumanta Chakraborty, Shasvath J. Kapadia, Md Arif
Shaikh, Parameswaran Ajith | Probing black hole charge with gravitational microlensing of
gravitational waves | 15 pages, 8 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Gravitational microlensing of gravitational waves (GWs) opens up the exciting
possibility of studying the spacetime geometry around the lens. In this work,
we investigate the prospects of constraining the `charged' hair of a black hole
(BH) from the observation of a GW signal microlensed by the BH. The charge can
hav... | [
{
"created": "Fri, 12 Jan 2024 12:58:53 GMT",
"version": "v1"
}
] | 2024-01-15 | [
[
"Deka",
"Uddeepta",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Kapadia",
"Shasvath J.",
""
],
[
"Shaikh",
"Md Arif",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | Gravitational microlensing of gravitational waves (GWs) opens up the exciting possibility of studying the spacetime geometry around the lens. In this work, we investigate the prospects of constraining the `charged' hair of a black hole (BH) from the observation of a GW signal microlensed by the BH. The charge can have ... |
1803.04472 | David Sloan | David Sloan | Dynamical Similarity | 17 pages. Updated to remove a flaw in section II and align with
standard terminology | Phys. Rev. D 97, 123541 (2018) | 10.1103/PhysRevD.97.123541 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine "dynamical similarities" in the Lagrangian framework. These are
symmetries of an intrinsically determined physical system under which
observables remain unaffected, but the extraneous information is changed. We
establish three central results in this context: i) Given a system with such a
symmetry there ex... | [
{
"created": "Mon, 12 Mar 2018 19:21:17 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Apr 2018 16:40:44 GMT",
"version": "v2"
}
] | 2018-07-04 | [
[
"Sloan",
"David",
""
]
] | We examine "dynamical similarities" in the Lagrangian framework. These are symmetries of an intrinsically determined physical system under which observables remain unaffected, but the extraneous information is changed. We establish three central results in this context: i) Given a system with such a symmetry there exis... |
gr-qc/0205106 | Pisin Chen | Pisin Chen and Ronald J. Adler | Black Hole Remnants and Dark Matter | 4 pages; to appear in the Proceedings of the 5th UCLA Dark Matter
Symposium, Marina del Rey, Ca, Feb. 20-22, 2002 | Nucl.Phys.Proc.Suppl. 124 (2003) 103-106 | 10.1016/S0920-5632(03)02088-7 | null | gr-qc | null | We argue that, when the gravity effect is included, the generalized
uncertainty principle (GUP) may prevent black holes from total evaporation in a
similar way that the standard uncertainty principle prevents the hydrogen atom
from total collapse. Specifically we invoke the GUP to obtain a modified
Hawking temperatur... | [
{
"created": "Fri, 24 May 2002 19:30:09 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Chen",
"Pisin",
""
],
[
"Adler",
"Ronald J.",
""
]
] | We argue that, when the gravity effect is included, the generalized uncertainty principle (GUP) may prevent black holes from total evaporation in a similar way that the standard uncertainty principle prevents the hydrogen atom from total collapse. Specifically we invoke the GUP to obtain a modified Hawking temperature,... |
2306.11561 | Jun-Jin Peng | Jun-Jin Peng | A note on field equations in generalized theories of gravity | 39 pages, no figures, some details and one reference are added,
several typos are corrected | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the work (arXiv:1109.3846 [gr-qc]), to obtain a simple and economic
formulation of field equations for generalised theories of gravity described by
the Lagrangian $\sqrt{-g}L\big(g^{\alpha\beta},R_{\mu\nu\rho\sigma}\big)$, the
key equality $\big(\partial L/\partial
g^{\mu\nu}\big)_{R_{\alpha\beta\kappa\omega}}
=2P... | [
{
"created": "Tue, 20 Jun 2023 14:28:00 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Jun 2023 07:41:08 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Jul 2023 00:50:57 GMT",
"version": "v3"
},
{
"created": "Tue, 11 Jul 2023 09:48:49 GMT",
"version": "v4"
},
{
"cr... | 2024-06-26 | [
[
"Peng",
"Jun-Jin",
""
]
] | In the work (arXiv:1109.3846 [gr-qc]), to obtain a simple and economic formulation of field equations for generalised theories of gravity described by the Lagrangian $\sqrt{-g}L\big(g^{\alpha\beta},R_{\mu\nu\rho\sigma}\big)$, the key equality $\big(\partial L/\partial g^{\mu\nu}\big)_{R_{\alpha\beta\kappa\omega}} =2P_{... |
gr-qc/0306013 | Leonid Grishchuk | L. P. Grishchuk | Electromagnetic Generators and Detectors of Gravitational Waves | 7 pages including 1 figure; invited talk at the first conference on
High-Frequency Gravitational Waves, May 2003, The MITRE Corporation, McLean,
Virginia, USA | null | null | null | gr-qc astro-ph hep-ph hep-th | null | The renewed serious interest to possible practical applications of
gravitational waves is encouraging. Building on previous work, I am arguing
that the strong variable electromagnetic fields are appropriate systems for the
generation and detection of high-frequency gravitational waves (HFGW). The
advantages of electr... | [
{
"created": "Tue, 3 Jun 2003 14:48:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grishchuk",
"L. P.",
""
]
] | The renewed serious interest to possible practical applications of gravitational waves is encouraging. Building on previous work, I am arguing that the strong variable electromagnetic fields are appropriate systems for the generation and detection of high-frequency gravitational waves (HFGW). The advantages of electrom... |
gr-qc/0507115 | Narayan Banerjee | Sudipta Das and Narayan Banerjee | An interacting scalar field and the recent cosmic acceleration | 10 pages, 2 figures | Gen.Rel.Grav. 38 (2006) 785-794 | 10.1007/s10714-006-0296-z | null | gr-qc | null | In this paper it is shown that the Brans - Dicke scalar field itself can
serve the purpose of providing an early deceleration and a late time
acceleration of the universe without any need of quintessence field if one
considers an interaction, i.e, transfer of energy between the dark matter and
the Brans - Dicke scala... | [
{
"created": "Wed, 27 Jul 2005 12:59:29 GMT",
"version": "v1"
},
{
"created": "Fri, 19 May 2006 13:26:07 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Das",
"Sudipta",
""
],
[
"Banerjee",
"Narayan",
""
]
] | In this paper it is shown that the Brans - Dicke scalar field itself can serve the purpose of providing an early deceleration and a late time acceleration of the universe without any need of quintessence field if one considers an interaction, i.e, transfer of energy between the dark matter and the Brans - Dicke scalar ... |
1302.3470 | Maurice H. P. M. van Putten | Maurice H.P.M. van Putten | A holographic bound on the total number of computations in the visible
Universe | published version | IJMP-D, 24, 1550024 (2015) | 10.1142/S0218271815500248 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Information $I$ in holographic imaging of massive particles by star-like
screens is shown to represent the probability of detection based on their
propagator. Results are derived for screens in the shape of a plane, cube and
sphere from unitarity in the exponentially small transition probability for a
detection outsi... | [
{
"created": "Thu, 14 Feb 2013 16:58:43 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Aug 2014 03:04:11 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Mar 2015 11:05:34 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"van Putten",
"Maurice H. P. M.",
""
]
] | Information $I$ in holographic imaging of massive particles by star-like screens is shown to represent the probability of detection based on their propagator. Results are derived for screens in the shape of a plane, cube and sphere from unitarity in the exponentially small transition probability for a detection outside... |
2204.13108 | Manuel D. Malaver | Manuel Malaver and Rajan Iyer | Analytical Model of Compact Star with a new version of Modified
Chaplygin Equation of State | 28 pages, 14 figures. arXiv admin note: text overlap with
arXiv:2106.09520 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we found a new model for compact star with anisotropic matter
distribution considering the new version of Chaplygin fluid equation of state
of Errehymy and Daoud (2021). We specify the particular form of the metric
potential proposed for Thirukanesh and Ragel (2012) and generalized for Malaver
(2014) in... | [
{
"created": "Wed, 27 Apr 2022 03:20:27 GMT",
"version": "v1"
}
] | 2022-04-29 | [
[
"Malaver",
"Manuel",
""
],
[
"Iyer",
"Rajan",
""
]
] | In this paper we found a new model for compact star with anisotropic matter distribution considering the new version of Chaplygin fluid equation of state of Errehymy and Daoud (2021). We specify the particular form of the metric potential proposed for Thirukanesh and Ragel (2012) and generalized for Malaver (2014) in o... |
2008.01395 | Andronikos Paliathanasis | Alex Giacomini, Genly Leon, Andronikos Paliathanasis and Supriya Pan | Dynamics of Quintessence in Generalized Uncertainty Principle | 16 pages, 7 figures | null | 10.1140/epjc/s10052-020-08508-4 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quintessence scalar field model modified by the
Generalized Uncertainty Principle in the background of a spatially flat
homogeneous and isotropic universe. By performing a dynamical system analysis
we examine the nature of the critical points and their stability for two
potentials, one is the expon... | [
{
"created": "Tue, 4 Aug 2020 08:11:11 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Giacomini",
"Alex",
""
],
[
"Leon",
"Genly",
""
],
[
"Paliathanasis",
"Andronikos",
""
],
[
"Pan",
"Supriya",
""
]
] | We investigate the quintessence scalar field model modified by the Generalized Uncertainty Principle in the background of a spatially flat homogeneous and isotropic universe. By performing a dynamical system analysis we examine the nature of the critical points and their stability for two potentials, one is the exponen... |
1804.03912 | Fr\'ed\'eric Lamy | Pierre Bin\'etruy, Alexis Helou, Fr\'ed\'eric Lamy | Closed trapping horizons without singularity | 26 pages, 20 figures | Phys. Rev. D 98, 064058 (2018) | 10.1103/PhysRevD.98.064058 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In gravitational collapse leading to black hole formation, trapping horizons
typically develop inside the contracting matter. Classically, an ingoing
trapping horizon moves towards the centre where it reaches a curvature
singularity, while an outgoing horizon moves towards the surface of the star
where it becomes an ... | [
{
"created": "Wed, 11 Apr 2018 10:26:31 GMT",
"version": "v1"
}
] | 2018-10-03 | [
[
"Binétruy",
"Pierre",
""
],
[
"Helou",
"Alexis",
""
],
[
"Lamy",
"Frédéric",
""
]
] | In gravitational collapse leading to black hole formation, trapping horizons typically develop inside the contracting matter. Classically, an ingoing trapping horizon moves towards the centre where it reaches a curvature singularity, while an outgoing horizon moves towards the surface of the star where it becomes an is... |
2206.09632 | Aurelien Barrau | Cyril Renevey, Aur\'elien Barrau, Killian Martineau | Detailed analysis of the curvature bounce: background dynamics and
imprints in the CMB | null | null | 10.1140/epjc/s10052-022-10745-8 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If the spatial sections of the Universe are positively curved, extrapolating
the inflationary stage backward in time inevitably leads to a classical bounce.
This simple scenario, non-singular and free of exotic physics, deserves to be
investigated in details. The background dynamics exhibits interesting features
and ... | [
{
"created": "Mon, 20 Jun 2022 08:30:38 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Renevey",
"Cyril",
""
],
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
]
] | If the spatial sections of the Universe are positively curved, extrapolating the inflationary stage backward in time inevitably leads to a classical bounce. This simple scenario, non-singular and free of exotic physics, deserves to be investigated in details. The background dynamics exhibits interesting features and is... |
0907.3797 | Guillermo A. Mena Marugan | Guillermo A. Mena Marugan, Mercedes Martin-Benito | Hybrid Quantum Cosmology: Combining Loop and Fock Quantizations | 24 pages, published in International Journal of Modern Physics A,
Special Issue: Proceedings of the Second Workshop on Quantum Gravity and
Noncommutative Geometry (Lisbon, Portugal) | Int.J.Mod.Phys.A24:2820-2838,2009 | 10.1142/S0217751X09046187 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As a necessary step towards the extraction of realistic results from Loop
Quantum Cosmology, we analyze the physical consequences of including
inhomogeneities. We consider in detail the quantization of a gravitational
model in vacuo which possesses local degrees of freedom, namely, the linearly
polarized Gowdy cosmol... | [
{
"created": "Wed, 22 Jul 2009 08:33:47 GMT",
"version": "v1"
}
] | 2009-07-23 | [
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Martin-Benito",
"Mercedes",
""
]
] | As a necessary step towards the extraction of realistic results from Loop Quantum Cosmology, we analyze the physical consequences of including inhomogeneities. We consider in detail the quantization of a gravitational model in vacuo which possesses local degrees of freedom, namely, the linearly polarized Gowdy cosmolog... |
2203.05190 | Sobhan Kazempour | Sobhan Kazempour, Yuan-Chuan Zou, and Amin Rezaei Akbarieh | Analysis of accretion disk around a black hole in dRGT massive gravity | null | European Physical Journal C volume 82, Article number: 190 (2022) | 10.1140/epjc/s10052-022-10153-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We show the analysis of a thin accretion disk around a static and spherically
symmetric black hole in dRGT massive gravity. We present the accretion disk
analysis in a gravitational theory with a nonzero graviton mass. Also, we study
the event horizons of the black hole and we calculate the equations of motion
and ef... | [
{
"created": "Thu, 10 Mar 2022 06:59:54 GMT",
"version": "v1"
}
] | 2022-03-11 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Zou",
"Yuan-Chuan",
""
],
[
"Akbarieh",
"Amin Rezaei",
""
]
] | We show the analysis of a thin accretion disk around a static and spherically symmetric black hole in dRGT massive gravity. We present the accretion disk analysis in a gravitational theory with a nonzero graviton mass. Also, we study the event horizons of the black hole and we calculate the equations of motion and effe... |
2305.05625 | Becca Ewing | Becca Ewing, Rachael Huxford, Divya Singh, Leo Tsukada, Chad Hanna,
Yun-Jing Huang, Prathamesh Joshi, Alvin K. Y. Li, Ryan Magee, Cody Messick,
Alex Pace, Anarya Ray, Surabhi Sachdev, Shio Sakon, Ron Tapia, Shomik
Adhicary, Pratyusava Baral, Amanda Baylor, Kipp Cannon, Sarah Caudill,
Sushant Sharma Chaudhary, M... | Performance of the low-latency GstLAL inspiral search towards LIGO,
Virgo, and KAGRA's fourth observing run | 19 pages, 21 figures | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | GstLAL is a stream-based matched-filtering search pipeline aiming at the
prompt discovery of gravitational waves from compact binary coalescences such
as the mergers of black holes and neutron stars. Over the past three
observation runs by the LIGO, Virgo, and KAGRA (LVK) collaboration, the GstLAL
search pipeline has... | [
{
"created": "Tue, 9 May 2023 17:10:06 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2023 14:06:52 GMT",
"version": "v2"
}
] | 2023-07-14 | [
[
"Ewing",
"Becca",
""
],
[
"Huxford",
"Rachael",
""
],
[
"Singh",
"Divya",
""
],
[
"Tsukada",
"Leo",
""
],
[
"Hanna",
"Chad",
""
],
[
"Huang",
"Yun-Jing",
""
],
[
"Joshi",
"Prathamesh",
""
],
[
"Li",... | GstLAL is a stream-based matched-filtering search pipeline aiming at the prompt discovery of gravitational waves from compact binary coalescences such as the mergers of black holes and neutron stars. Over the past three observation runs by the LIGO, Virgo, and KAGRA (LVK) collaboration, the GstLAL search pipeline has p... |
1001.4752 | James Phillips | Robert D. Reasenberg and James D. Phillips (Smithsonian Astrophysical
Observatory, Harvard-Smithsonian Center for Astrophysics) | A weak equivalence principle test on a suborbital rocket | To be published in Classical and Quantum Gravity. 14 pages, 6
figures. Further information available at http://www.cfa.harvard.edu/poem/ | null | 10.1088/0264-9381/27/9/095005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a Galilean test of the weak equivalence principle, to be
conducted during the free fall portion of a sounding rocket flight. The test of
a single pair of substances is aimed at a measurement uncertainty of sigma(eta)
< 10^-16 after averaging the results of eight separate drops. The weak
equivalence princi... | [
{
"created": "Tue, 26 Jan 2010 17:42:51 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Reasenberg",
"Robert D.",
"",
"Smithsonian Astrophysical\n Observatory, Harvard-Smithsonian Center for Astrophysics"
],
[
"Phillips",
"James D.",
"",
"Smithsonian Astrophysical\n Observatory, Harvard-Smithsonian Center for Astrophysics"
]
] | We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a sounding rocket flight. The test of a single pair of substances is aimed at a measurement uncertainty of sigma(eta) < 10^-16 after averaging the results of eight separate drops. The weak equivalence principl... |
1912.01654 | Swagat Saurav Mishra | Swagat S. Mishra, Daniel M\"uller and Aleksey V. Toporensky | Generality of Starobinsky and Higgs inflation in the Jordan frame | 15 pages, 8 figures, additional text and references, typos corrected,
matches published version in PRD | Phys. Rev. D 102, 063523 (2020) | 10.1103/PhysRevD.102.063523 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the problem of generality of Starobinsky and Higgs inflation. The
known results obtained in the Einstein frame are generalized for the case of an
arbitrary initial energy of the scalar field. These results are compared with
the results obtained directly in the Jordan frame, which, to our knowledge, has
not... | [
{
"created": "Tue, 3 Dec 2019 19:49:12 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2020 17:19:41 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Jun 2021 07:26:09 GMT",
"version": "v3"
}
] | 2021-06-21 | [
[
"Mishra",
"Swagat S.",
""
],
[
"Müller",
"Daniel",
""
],
[
"Toporensky",
"Aleksey V.",
""
]
] | We revisit the problem of generality of Starobinsky and Higgs inflation. The known results obtained in the Einstein frame are generalized for the case of an arbitrary initial energy of the scalar field. These results are compared with the results obtained directly in the Jordan frame, which, to our knowledge, has not b... |
gr-qc/9606024 | Eric Poisson | Eric Poisson | Measuring black-hole parameters and testing general relativity using
gravitational-wave data from space-based interferometers | ReVTeX, 16 pages, 5 postscript figures | Phys.Rev. D54 (1996) 5939-5953 | 10.1103/PhysRevD.54.5939 | null | gr-qc | null | Among the expected sources of gravitational waves for the Laser
Interferometer Space Antenna (LISA) is the capture of solar-mass compact stars
by massive black holes residing in galactic centers. We construct a simple
model for such a capture, in which the compact star moves freely on a circular
orbit in the equatori... | [
{
"created": "Wed, 12 Jun 1996 17:30:10 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Poisson",
"Eric",
""
]
] | Among the expected sources of gravitational waves for the Laser Interferometer Space Antenna (LISA) is the capture of solar-mass compact stars by massive black holes residing in galactic centers. We construct a simple model for such a capture, in which the compact star moves freely on a circular orbit in the equatorial... |
2011.12122 | Alexandre Toubiana | Alexandre Toubiana, Stanislav Babak, Enrico Barausse and Luis Lehner | Modeling gravitational waves from exotic compact objects | 11 pages (13 with appendix) Matches the version published in PRD | Phys. Rev. D 103, 064042 (2021) | 10.1103/PhysRevD.103.064042 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | Exotic compact objects can be difficult to distinguish from black holes in
the inspiral phase of the binaries observed by gravitational-wave detectors,
but significant differences may be present in the merger and post-merger
signal. We introduce a toy model capturing the salient features of binaries of
exotic compact... | [
{
"created": "Tue, 24 Nov 2020 14:30:15 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Apr 2021 18:48:38 GMT",
"version": "v2"
}
] | 2021-04-13 | [
[
"Toubiana",
"Alexandre",
""
],
[
"Babak",
"Stanislav",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Lehner",
"Luis",
""
]
] | Exotic compact objects can be difficult to distinguish from black holes in the inspiral phase of the binaries observed by gravitational-wave detectors, but significant differences may be present in the merger and post-merger signal. We introduce a toy model capturing the salient features of binaries of exotic compact o... |
1712.02992 | Tim Dietrich | Tim Dietrich, Sebastiano Bernuzzi, Bernd Bruegmann, Maximiliano
Ujevic, Wolfgang Tichy | Numerical Relativity Simulations of Precessing Binary Neutron Star
Mergers | 12 pages, 10 figures, comments are welcome | Phys. Rev. D 97, 064002 (2018) | 10.1103/PhysRevD.97.064002 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first set of numerical relativity simulations of binary
neutron mergers that include spin precession effects and are evolved with
multiple resolutions. Our simulations employ consistent initial data in general
relativity with different spin configurations and dimensionless spin magnitudes
$\sim 0.1$. T... | [
{
"created": "Fri, 8 Dec 2017 09:32:11 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Dietrich",
"Tim",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Ujevic",
"Maximiliano",
""
],
[
"Tichy",
"Wolfgang",
""
]
] | We present the first set of numerical relativity simulations of binary neutron mergers that include spin precession effects and are evolved with multiple resolutions. Our simulations employ consistent initial data in general relativity with different spin configurations and dimensionless spin magnitudes $\sim 0.1$. The... |
2404.03345 | D\'ebora Aguiar Gomes | Aneta Wojnar, D\'ebora Aguiar Gomes | Bose and Fermi gases in metric-affine gravity and linear Generalized
Uncertainty Principle | 8 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the relationship between Palatini-like theories of gravity and
models incorporating linear generalized uncertainty principles. Additionally,
we delve into the thermodynamics of systems comprising both Bose and Fermi
gases. Our analysis encompasses the equations of state for various systems,
including gener... | [
{
"created": "Thu, 4 Apr 2024 10:21:24 GMT",
"version": "v1"
}
] | 2024-04-05 | [
[
"Wojnar",
"Aneta",
""
],
[
"Gomes",
"Débora Aguiar",
""
]
] | We examine the relationship between Palatini-like theories of gravity and models incorporating linear generalized uncertainty principles. Additionally, we delve into the thermodynamics of systems comprising both Bose and Fermi gases. Our analysis encompasses the equations of state for various systems, including general... |
2405.19407 | Bassel Saleh | Bassel Saleh, Aaron Zimmerman, Peng Chen, Omar Ghattas | Tempered Multifidelity Importance Sampling for Gravitational Wave
Parameter Estimation | 19 pages, 10 figures, 1 table | null | null | null | gr-qc astro-ph.IM stat.ME | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Estimating the parameters of compact binaries which coalesce and produce
gravitational waves is a challenging Bayesian inverse problem.
Gravitational-wave parameter estimation lies within the class of multifidelity
problems, where a variety of models with differing assumptions, levels of
fidelity, and computational c... | [
{
"created": "Wed, 29 May 2024 18:00:02 GMT",
"version": "v1"
}
] | 2024-05-31 | [
[
"Saleh",
"Bassel",
""
],
[
"Zimmerman",
"Aaron",
""
],
[
"Chen",
"Peng",
""
],
[
"Ghattas",
"Omar",
""
]
] | Estimating the parameters of compact binaries which coalesce and produce gravitational waves is a challenging Bayesian inverse problem. Gravitational-wave parameter estimation lies within the class of multifidelity problems, where a variety of models with differing assumptions, levels of fidelity, and computational cos... |
2302.10482 | Tao Zhu | Jian-Ming Yan, Cheng Liu, Tao Zhu, Qiang Wu, and Anzhong Wang | Observational tests of quantum extension of Schwarzschild spacetime in
loop quantum gravity with stars in the galactic center | 12 pages, 6 figures | Phys. Rev. D 107, 084043 (2023) | 10.1103/PhysRevD.107.084043 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we use the publicly available observational data of 17 stellar
stars orbiting Sgr A* to test the quantum extension of Schwarzschild spacetime
in loop quantum gravity (LQG). For our purpose, we transform the geodesical
evolution of a massive particle in the quantum-extended Schwarzschild black
hole to t... | [
{
"created": "Tue, 21 Feb 2023 07:08:59 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Apr 2023 04:01:02 GMT",
"version": "v2"
}
] | 2023-05-02 | [
[
"Yan",
"Jian-Ming",
""
],
[
"Liu",
"Cheng",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wu",
"Qiang",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper, we use the publicly available observational data of 17 stellar stars orbiting Sgr A* to test the quantum extension of Schwarzschild spacetime in loop quantum gravity (LQG). For our purpose, we transform the geodesical evolution of a massive particle in the quantum-extended Schwarzschild black hole to the... |
1201.0005 | Alexey Krugly | Alexey L. Krugly | The dynamics of binary alternatives for a discrete pregeometry | 13 pages, 9 figures, work presented at the "International conference
on theoretical physics 2011" held on 20-23 June 2011 at the Moscow State Open
University, Moscow, Russia | in Theoretical physics, Proceeding of the international
conference, 20-23 June 2011, State Open University, Moscow, Russia, pp.
16-29, State Open University press, Moscow, 2012 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A particular case of a causal set is considered that is a directed dyadic
acyclic graph. This is a model of a discrete pregeometry on a microscopic
scale. The dynamics is a stochastic sequential growth of the graph. New
vertexes of the graph are added one by one. The probability of each step
depends on the structure ... | [
{
"created": "Wed, 28 Dec 2011 02:29:10 GMT",
"version": "v1"
}
] | 2012-10-12 | [
[
"Krugly",
"Alexey L.",
""
]
] | A particular case of a causal set is considered that is a directed dyadic acyclic graph. This is a model of a discrete pregeometry on a microscopic scale. The dynamics is a stochastic sequential growth of the graph. New vertexes of the graph are added one by one. The probability of each step depends on the structure of... |
1911.09690 | Merced Montesinos | Merced Montesinos, Jorge Romero, Mariano Celada | Canonical analysis of Holst action without second-class constraints | Paper's title was changed, expanded analysis, notation was changed a
bit, added references, corrected typos | Phys. Rev. D 101, 084003 (2020) | 10.1103/PhysRevD.101.084003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the canonical analysis of the Holst action for general relativity
with a cosmological constant without introducing second-class constraints. Our
approach consists in identifying the dynamical and nondynamical parts of the
involved variables from the very outset. After integrating out the nondynamical
varia... | [
{
"created": "Thu, 21 Nov 2019 19:00:12 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Apr 2020 18:04:14 GMT",
"version": "v2"
}
] | 2020-04-08 | [
[
"Montesinos",
"Merced",
""
],
[
"Romero",
"Jorge",
""
],
[
"Celada",
"Mariano",
""
]
] | We perform the canonical analysis of the Holst action for general relativity with a cosmological constant without introducing second-class constraints. Our approach consists in identifying the dynamical and nondynamical parts of the involved variables from the very outset. After integrating out the nondynamical variabl... |
2205.06962 | Che-Yu Chen | Che-Yu Chen | Testing black hole equatorial reflection symmetry using Sgr A* shadow
images | 15 pages, 3 figures, updated to match the published version | Phys. Rev. D 106 (2022) 044009 | 10.1103/PhysRevD.106.044009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently released images of the supermassive black holes in the M87
galaxy and the galaxy of our own make probing black hole spacetimes and testing
general relativity (GR) possible. The violation of equatorial reflection
symmetry of black hole spacetimes is clearly a smoking gun of physics beyond
GR. In this pape... | [
{
"created": "Sat, 14 May 2022 04:18:51 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Aug 2022 18:40:30 GMT",
"version": "v2"
}
] | 2022-08-04 | [
[
"Chen",
"Che-Yu",
""
]
] | The recently released images of the supermassive black holes in the M87 galaxy and the galaxy of our own make probing black hole spacetimes and testing general relativity (GR) possible. The violation of equatorial reflection symmetry of black hole spacetimes is clearly a smoking gun of physics beyond GR. In this paper,... |
gr-qc/9605066 | Fernando Barbero | J. Fernando Barbero G. (LAEFF, Madrid, Spain) | From Euclidean to Lorentzian General Relativity: The Real Way | 20 pages uuencoded gzipped tar format. Accepted in Phys. Rev. D. Some
references added | Phys.Rev.D54:1492-1499,1996 | 10.1103/PhysRevD.54.1492 | LAEFF-95/25 | gr-qc | null | We study in this paper a new approach to the problem of relating solutions to
the Einstein field equations with Riemannian and Lorentzian signatures. The
procedure can be thought of as a "real Wick rotation". We give a modified
action for general relativity, depending on two real parameters, that can be
used to contr... | [
{
"created": "Wed, 29 May 1996 15:37:22 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jun 1996 14:24:13 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"G.",
"J. Fernando Barbero",
"",
"LAEFF, Madrid, Spain"
]
] | We study in this paper a new approach to the problem of relating solutions to the Einstein field equations with Riemannian and Lorentzian signatures. The procedure can be thought of as a "real Wick rotation". We give a modified action for general relativity, depending on two real parameters, that can be used to control... |
2010.16086 | Shailesh Kumar | Srijit Bhattacharjee, Shailesh Kumar and Arpan Bhattacharyya | Displacement memory effect near the horizon of black holes | V3: 28 pages, 1 figure, 1 reference added, and Substantial changes to
the texts, matches with the version to appear in Journal of High Energy
Physics | JHEP 03 (2021) 134 | 10.1007/JHEP03(2021)134 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the displacement memory effect and its connection with the
extended-BMS symmetries near the horizon of black holes. We show there is a
permanent shift in the geodesic deviation vector relating two nearby timelike
geodesics placed close to the horizon of black holes, upon the passage of
gravitational waves. W... | [
{
"created": "Fri, 30 Oct 2020 05:53:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2020 18:33:26 GMT",
"version": "v2"
},
{
"created": "Sat, 6 Feb 2021 04:47:56 GMT",
"version": "v3"
}
] | 2021-03-16 | [
[
"Bhattacharjee",
"Srijit",
""
],
[
"Kumar",
"Shailesh",
""
],
[
"Bhattacharyya",
"Arpan",
""
]
] | We study the displacement memory effect and its connection with the extended-BMS symmetries near the horizon of black holes. We show there is a permanent shift in the geodesic deviation vector relating two nearby timelike geodesics placed close to the horizon of black holes, upon the passage of gravitational waves. We ... |
gr-qc/0204086 | Edward Malec | Janusz Karkowski, Edward Malec and Zdobyslaw Swierczynski | Schwarzschild black holes and propagation of electromagnetic and
gravitational waves | 3 figures eps | Acta Phys.Polon. B32 (2001) 3593-3603 | null | null | gr-qc | null | Disturbing of a spacetime geometry may result in the appearance of an
oscillating and damped radiation - the so-called quasinormal modes. Their
periods of oscillations and damping coefficients carry unique information about
the mass and the angular momentum, that would allow one to identify the source
of the gravitat... | [
{
"created": "Mon, 29 Apr 2002 12:26:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Karkowski",
"Janusz",
""
],
[
"Malec",
"Edward",
""
],
[
"Swierczynski",
"Zdobyslaw",
""
]
] | Disturbing of a spacetime geometry may result in the appearance of an oscillating and damped radiation - the so-called quasinormal modes. Their periods of oscillations and damping coefficients carry unique information about the mass and the angular momentum, that would allow one to identify the source of the gravitatio... |
2405.02380 | Quentin Ansel | Quentin Ansel | Emergent gravity from the correlation of spin-$\tfrac{1}{2}$ systems
coupled with a scalar field | null | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | This paper introduces several ideas of emergent gravity, which come from a
system similar to an ensemble of quantum spin-$\tfrac{1}{2}$ particles. To
derive a physically relevant theory, the model is constructed by quantizing a
scalar field in curved space-time. The quantization is based on a classical
discretization... | [
{
"created": "Fri, 3 May 2024 14:34:48 GMT",
"version": "v1"
}
] | 2024-05-07 | [
[
"Ansel",
"Quentin",
""
]
] | This paper introduces several ideas of emergent gravity, which come from a system similar to an ensemble of quantum spin-$\tfrac{1}{2}$ particles. To derive a physically relevant theory, the model is constructed by quantizing a scalar field in curved space-time. The quantization is based on a classical discretization o... |
gr-qc/0207125 | Stoytcho Yazadjiev | Stoytcho Yazadjiev, Ventseslav Rizov | Singularity free cosmological solutions of Einstein-Maxwell equations | 8 pages,latex; v2 some typos corrected | Mod.Phys.Lett. A18 (2003) 2555-2562 | 10.1142/S0217732303012271 | null | gr-qc | null | We report on a new two-parameter class of cosmological solutions to the
Einstein-Maxwell equations. The solutions have everywhere regular curvature
invariants. We prove that the solutions are geodesically complete and globally
hyperbolic.
| [
{
"created": "Wed, 31 Jul 2002 18:00:41 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2002 07:50:42 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Yazadjiev",
"Stoytcho",
""
],
[
"Rizov",
"Ventseslav",
""
]
] | We report on a new two-parameter class of cosmological solutions to the Einstein-Maxwell equations. The solutions have everywhere regular curvature invariants. We prove that the solutions are geodesically complete and globally hyperbolic. |
1112.2311 | Isabeau Pr\'emont-Schwarz | Isabeau Pr\'emont-Schwarz | Experimenting with Quantum Fields in Curved Spacetime in the Lab | 5 pages, to be published in the proceedings of LOOPS '11 in Journal
of Physics: Conference Series | null | null | null | gr-qc cond-mat.mes-hall cond-mat.mtrl-sci | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we will investigate how one can create emergent curved
spacetimes by locally tuning the coupling constants of condensed matter
systems. In the continuum limit we thus obtain continuous effective quantum
fields living on curved spacetimes. In particular, using Stingnet condensates
we can obtain effective... | [
{
"created": "Sun, 11 Dec 2011 00:01:22 GMT",
"version": "v1"
}
] | 2011-12-13 | [
[
"Prémont-Schwarz",
"Isabeau",
""
]
] | In this paper we will investigate how one can create emergent curved spacetimes by locally tuning the coupling constants of condensed matter systems. In the continuum limit we thus obtain continuous effective quantum fields living on curved spacetimes. In particular, using Stingnet condensates we can obtain effective e... |
gr-qc/0008052 | Martin Bojowald | Martin Bojowald | Loop Quantum Cosmology III: Wheeler-DeWitt Operators | 19 pages | Class.Quant.Grav. 18 (2001) 1055-1070 | 10.1088/0264-9381/18/6/307 | PITHA 00/17 | gr-qc hep-th | null | In the framework of loop quantum cosmology anomaly free quantizations of the
Hamiltonian constraint for Bianchi class A, locally rotationally symmetric and
isotropic models are given. Basic ideas of the construction in (non-symmetric)
loop quantum gravity can be used, but there are also further inputs because the
spe... | [
{
"created": "Tue, 22 Aug 2000 10:18:31 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Bojowald",
"Martin",
""
]
] | In the framework of loop quantum cosmology anomaly free quantizations of the Hamiltonian constraint for Bianchi class A, locally rotationally symmetric and isotropic models are given. Basic ideas of the construction in (non-symmetric) loop quantum gravity can be used, but there are also further inputs because the speci... |
gr-qc/0310008 | Michael Kuchiev | M. Yu. Kuchiev | Reflection from black holes | null | null | null | null | gr-qc astro-ph hep-th | null | Black holes are presumed to have an ideal ability to absorb and keep matter.
Whatever comes close to the event horizon, a boundary separating the inside
region of a black hole from the outside world, inevitably goes in and remains
inside forever. This work shows, however, that quantum corrections make
possible a surp... | [
{
"created": "Thu, 2 Oct 2003 00:36:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kuchiev",
"M. Yu.",
""
]
] | Black holes are presumed to have an ideal ability to absorb and keep matter. Whatever comes close to the event horizon, a boundary separating the inside region of a black hole from the outside world, inevitably goes in and remains inside forever. This work shows, however, that quantum corrections make possible a surpri... |
1511.04316 | Javad Taghizadeh Firouzjaee | Javad T. Firouzjaee and George F R Ellis | Particle creation rate for dynamical black holes | 10 pages, 1 figure. The paper was rewritten in more clear
presentation and one more appendix is added | null | 10.1140/epjc/s10052-016-4479-9 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We present the particle creation probability rate around a general black hole
as an outcome of quantum fluctuations. Using the uncertainty principle for
these fluctuation, we derive a new ultraviolet frequency cutoff for the
radiation spectrum of a dynamical black hole. Using this frequency cutoff, we
define the prob... | [
{
"created": "Fri, 13 Nov 2015 15:30:13 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Feb 2016 13:30:50 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Oct 2016 11:31:12 GMT",
"version": "v3"
}
] | 2016-12-21 | [
[
"Firouzjaee",
"Javad T.",
""
],
[
"Ellis",
"George F R",
""
]
] | We present the particle creation probability rate around a general black hole as an outcome of quantum fluctuations. Using the uncertainty principle for these fluctuation, we derive a new ultraviolet frequency cutoff for the radiation spectrum of a dynamical black hole. Using this frequency cutoff, we define the probab... |
gr-qc/9711018 | Steve Brandt | S. R. Brandt, P. Walker, P. Anninos | New Coordinate Systems for Axisymmetric Black Hole Collisions | 3 pages, 5 postscript figures, LaTeX, uses mprocl.sty (available at
http://shemesh.fiz.huji.ac.il/MG8/submission.html) To appear in the
proceedings of the Marcel Grossmann 8 (Jerusalem, 1997) | null | null | null | gr-qc | null | We describe a numerical grid generating procedure to construct new classes of
orthogonal coordinate systems that are specially adapted to binary black hole
spacetimes. The new coordinates offer an alternative approach to the
conventional \v{C}ade\v{z} coordinates, in addition to providing a potentially
more stable an... | [
{
"created": "Thu, 6 Nov 1997 07:57:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brandt",
"S. R.",
""
],
[
"Walker",
"P.",
""
],
[
"Anninos",
"P.",
""
]
] | We describe a numerical grid generating procedure to construct new classes of orthogonal coordinate systems that are specially adapted to binary black hole spacetimes. The new coordinates offer an alternative approach to the conventional \v{C}ade\v{z} coordinates, in addition to providing a potentially more stable and ... |
2010.10281 | Iver Brevik | Iver Brevik | Classical and quantal aspects of Minkowski's four-momentum in analog
gravity | 13 pages, no figures. To appear in Phys. Rev. A | Phys. Rev. A 102, 052201 (2020) | 10.1103/PhysRevA.102.052201 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The electrodynamic theory of continuous media is probably the most convenient
platform when trying to construct analog gravity theories. Quite naturally,
this topic has gained considerable interest. One peculiar but not so very known
feature in this context is the unconventional behavior of radiation energy and
momen... | [
{
"created": "Tue, 20 Oct 2020 13:53:28 GMT",
"version": "v1"
}
] | 2020-11-05 | [
[
"Brevik",
"Iver",
""
]
] | The electrodynamic theory of continuous media is probably the most convenient platform when trying to construct analog gravity theories. Quite naturally, this topic has gained considerable interest. One peculiar but not so very known feature in this context is the unconventional behavior of radiation energy and momentu... |
1707.09156 | Meng-Sen Ma | Meng-Sen Ma, Rui-Hong Wang | Peculiar $P-V$ criticality of topological Ho\v{r}ava-Lifshitz black
holes | 16 pages, 8 figures. some typos are corrected. a note is added at the
last of the paper | Phys. Rev. D 96, 024052 (2017) | 10.1103/PhysRevD.96.024052 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate the existence of $P-V$ criticality of the topological
Ho\v{r}ava-Lifshitz(HL) black holes with a spherical horizon $(k=1)$ in the
extended phase space. With the electric charge, we find that the critical
behaviors of the HL black hole are nearly the same as those of van der
Waals(VdW) system. For the u... | [
{
"created": "Fri, 28 Jul 2017 09:02:49 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Aug 2017 15:58:30 GMT",
"version": "v2"
}
] | 2017-08-09 | [
[
"Ma",
"Meng-Sen",
""
],
[
"Wang",
"Rui-Hong",
""
]
] | We demonstrate the existence of $P-V$ criticality of the topological Ho\v{r}ava-Lifshitz(HL) black holes with a spherical horizon $(k=1)$ in the extended phase space. With the electric charge, we find that the critical behaviors of the HL black hole are nearly the same as those of van der Waals(VdW) system. For the unc... |
1507.04172 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi | Gravitational anomalies and one dimensional behaviour of black holes | Comments added, to appear in EPJC | Eur. Phys. J. C (2015) 75: 578 | 10.1140/epjc/s10052-015-3812-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been pointed out by Bekenstein and Mayo that the behavior of the Black
hole's entropy or information flow is similar to that through one-dimensional
channel. Here I analyse the same issue with the use of gravitational anomalies.
The rate of the entropy change ($\dot{S}$) and the power ($P$) of the Hawking
emis... | [
{
"created": "Wed, 15 Jul 2015 11:38:34 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2015 14:04:05 GMT",
"version": "v2"
}
] | 2015-12-18 | [
[
"Majhi",
"Bibhas Ranjan",
""
]
] | It has been pointed out by Bekenstein and Mayo that the behavior of the Black hole's entropy or information flow is similar to that through one-dimensional channel. Here I analyse the same issue with the use of gravitational anomalies. The rate of the entropy change ($\dot{S}$) and the power ($P$) of the Hawking emissi... |
1306.5285 | Jos\'e Villanueva | Marco Olivares, Yerko V\'asquez, J. R. Villanueva and Felipe Moncada | Motion of particles on a $z=2$ Lifshitz black hole in 3+1 dimensions | 11 pages, 6 figures | Celest Mech Dyn Astr (2014) 119: 207-217 | 10.1007/s10569-014-9555-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic structure of a $z=2$ Lifshitz black hole in 3+1
spacetime dimensions that is an exact solution to the Einstein-scalar-Maxwell
theory. We investigate the motion of massless and massive particles in this
background using the standard Lagrangian procedure. Analytical expressions are
obtained for ra... | [
{
"created": "Sat, 22 Jun 2013 02:46:36 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jun 2014 16:25:08 GMT",
"version": "v2"
}
] | 2014-06-20 | [
[
"Olivares",
"Marco",
""
],
[
"Vásquez",
"Yerko",
""
],
[
"Villanueva",
"J. R.",
""
],
[
"Moncada",
"Felipe",
""
]
] | We study the geodesic structure of a $z=2$ Lifshitz black hole in 3+1 spacetime dimensions that is an exact solution to the Einstein-scalar-Maxwell theory. We investigate the motion of massless and massive particles in this background using the standard Lagrangian procedure. Analytical expressions are obtained for radi... |
2203.04000 | Simon Boudet | Simon Boudet, Flavio Bombacigno, Gonzalo J. Olmo and Paulo J. Porfirio | Quasinormal modes of Schwarzschild black holes in projective invariant
Chern-Simons modified gravity | null | JCAP 05 (2022) 032 | 10.1088/1475-7516/2022/05/032 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We generalize the Chern-Simons modified gravity to the metric-affine case and
impose projective invariance by supplementing the Pontryagin density with
homothetic curvature terms which do not spoil topologicity. The latter is then
broken by promoting the coupling of the Chern-Simons term to a (pseudo)-scalar
field. T... | [
{
"created": "Tue, 8 Mar 2022 10:56:08 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2022 08:24:35 GMT",
"version": "v2"
}
] | 2022-05-20 | [
[
"Boudet",
"Simon",
""
],
[
"Bombacigno",
"Flavio",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Porfirio",
"Paulo J.",
""
]
] | We generalize the Chern-Simons modified gravity to the metric-affine case and impose projective invariance by supplementing the Pontryagin density with homothetic curvature terms which do not spoil topologicity. The latter is then broken by promoting the coupling of the Chern-Simons term to a (pseudo)-scalar field. The... |
1106.2749 | Jerzy Matyjasek | Jerzy Matyjasek and Katarzyna Zwierzchowska | Lukewarm black holes in quadratic gravity | null | Mod. Phys. Lett. A26, 999 (2011) | 10.1142/S0217732311035560 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative solutions to the fourth-order gravity describing
spherically-symmetric, static and electrically charged black hole in an
asymptotically de Sitter universe is constructed and discussed. Special
emphasis is put on the lukewarm configurations, in which the temperature of the
event horizon equals the tempera... | [
{
"created": "Tue, 14 Jun 2011 16:00:03 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Zwierzchowska",
"Katarzyna",
""
]
] | Perturbative solutions to the fourth-order gravity describing spherically-symmetric, static and electrically charged black hole in an asymptotically de Sitter universe is constructed and discussed. Special emphasis is put on the lukewarm configurations, in which the temperature of the event horizon equals the temperatu... |
0901.1242 | Bahtiyar Ozgur Sarioglu | Ozgur Sarioglu, Bayram Tekin | A note on cosmological Levi-Civita spacetimes in higher dimensions | 3 pages; version to appear in Phys. Rev. D | Phys.Rev.D79:087502,2009 | 10.1103/PhysRevD.79.087502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a class of solutions to cosmological Einstein equations that
generalizes the four dimensional cylindrically symmetric spacetimes to higher
dimensions. The AdS soliton is a special member of this class with a unique
singularity structure.
| [
{
"created": "Fri, 9 Jan 2009 13:29:06 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Apr 2009 09:38:03 GMT",
"version": "v2"
}
] | 2009-07-30 | [
[
"Sarioglu",
"Ozgur",
""
],
[
"Tekin",
"Bayram",
""
]
] | We find a class of solutions to cosmological Einstein equations that generalizes the four dimensional cylindrically symmetric spacetimes to higher dimensions. The AdS soliton is a special member of this class with a unique singularity structure. |
2302.08782 | Subenoy Chakraborty | Madhukrishna Chakraborty, Akash Bose and Subenoy Chakraborty | The Raychaudhuri Equation in inhomogeneous FLRW space-time : A
$f(R)$-gravity model | 19 pages, 6 figures | null | 10.1088/1402-4896/acb020 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In general description of the Raychaudhuri equation it is found that this
first order non-linear differential equation can be written as a second order
linear differential equation in the form of Harmonic Oscillator with varying
frequency. Further, the integrability of the Raychaudhuri equation has been
studied and a... | [
{
"created": "Fri, 17 Feb 2023 09:45:56 GMT",
"version": "v1"
}
] | 2023-02-20 | [
[
"Chakraborty",
"Madhukrishna",
""
],
[
"Bose",
"Akash",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In general description of the Raychaudhuri equation it is found that this first order non-linear differential equation can be written as a second order linear differential equation in the form of Harmonic Oscillator with varying frequency. Further, the integrability of the Raychaudhuri equation has been studied and als... |
2405.20537 | Jong Hyuk Yoon | Jong Hyuk Yoon and Seung Hun Oh | Poisson algebra of quasilocal angular momentum and its asymptotic limit | null | Classical and Quantum Gravity 35, 015003 (2018) | 10.1088/1361-6382/aa8ab2 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We study the previously proposed quasilocal angular momentum of gravitational
fields in the absence of isometries. The quasilocal angular momentum $L(\xi)$
has the following attractive properties; ({\it i}) it follows from the
Einstein's constraint equations, ({\it ii}) it satisfies the Poisson algebra
$\{L(\xi), L(\... | [
{
"created": "Thu, 30 May 2024 23:21:28 GMT",
"version": "v1"
}
] | 2024-06-03 | [
[
"Yoon",
"Jong Hyuk",
""
],
[
"Oh",
"Seung Hun",
""
]
] | We study the previously proposed quasilocal angular momentum of gravitational fields in the absence of isometries. The quasilocal angular momentum $L(\xi)$ has the following attractive properties; ({\it i}) it follows from the Einstein's constraint equations, ({\it ii}) it satisfies the Poisson algebra $\{L(\xi), L(\et... |
gr-qc/0103036 | Clifford M. Will | Clifford M. Will | The Confrontation between General Relativity and Experiment | 103 pages, 10 figures, accepted for publication in Living Reviews in
Relativity | LivingRev.Rel.4:4,2001 | 10.12942/lrr-2001-4 | null | gr-qc | null | The status of experimental tests of general relativity and of theoretical
frameworks for analysing them are reviewed. Einstein's equivalence principle
(EEP) is well supported by experiments such as the E\"otv\"os experiment, tests
of special relativity, and the gravitational redshift experiment. Future tests
of EEP a... | [
{
"created": "Mon, 12 Mar 2001 16:24:04 GMT",
"version": "v1"
}
] | 2016-10-19 | [
[
"Will",
"Clifford M.",
""
]
] | The status of experimental tests of general relativity and of theoretical frameworks for analysing them are reviewed. Einstein's equivalence principle (EEP) is well supported by experiments such as the E\"otv\"os experiment, tests of special relativity, and the gravitational redshift experiment. Future tests of EEP and... |
gr-qc/0201028 | Jan Ambjorn | J. Ambjorn | Simplicial Euclidean and Lorentzian Quantum Gravity | 23 pages, 4 eps figures, Plenary talk GR16 | null | 10.1142/9789812776556_0001 | null | gr-qc hep-lat hep-th | null | One can try to define the theory of quantum gravity as the sum over
geometries. In two dimensions the sum over {\it Euclidean} geometries can be
performed constructively by the method of {\it dynamical triangulations}. One
can define a {\it proper-time} propagator. This propagator can be used to
calculate generalized... | [
{
"created": "Wed, 9 Jan 2002 10:32:25 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Ambjorn",
"J.",
""
]
] | One can try to define the theory of quantum gravity as the sum over geometries. In two dimensions the sum over {\it Euclidean} geometries can be performed constructively by the method of {\it dynamical triangulations}. One can define a {\it proper-time} propagator. This propagator can be used to calculate generalized H... |
1002.2591 | Scott A. Hughes | Scott A. Hughes | Probing strong-field gravity and black holes with gravitational waves | 19 pages, 5 figures, for the Proceedings of the 19th Workshop on
General Relativity and Gravitation in Japan. Content very similar to recent
reviews by the author | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave observations will be excellent tools for making precise
measurements of processes that occur in very strong-field regions of spacetime.
Extreme mass ratio systems, formed by the capture of a stellar mass body
compact by a massive black hole, will be targets for planned space-based
interferometers s... | [
{
"created": "Fri, 12 Feb 2010 16:37:25 GMT",
"version": "v1"
}
] | 2010-02-15 | [
[
"Hughes",
"Scott A.",
""
]
] | Gravitational wave observations will be excellent tools for making precise measurements of processes that occur in very strong-field regions of spacetime. Extreme mass ratio systems, formed by the capture of a stellar mass body compact by a massive black hole, will be targets for planned space-based interferometers suc... |
gr-qc/0208058 | Mauricio Bellini | Mauricio Bellini (IFM, Michoacana University) | Ultralight particle creation during fresh inflation | 8 pages, 2 figures (to appear in Il Nuovo Cimento B) | Nuovo Cim.B117:653-658,2002 | null | null | gr-qc hep-ph | null | I study ultralight particle creation which becomes from the Yukawa
interaction between the inflaton and the thermal bath during fresh inflation.
Particle creation is important in the first stages of fresh inflation, when the
nonequilibrium thermal effects are important. I find that the number density of
the ultraligh... | [
{
"created": "Mon, 19 Aug 2002 22:18:59 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 2002 00:12:17 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Bellini",
"Mauricio",
"",
"IFM, Michoacana University"
]
] | I study ultralight particle creation which becomes from the Yukawa interaction between the inflaton and the thermal bath during fresh inflation. Particle creation is important in the first stages of fresh inflation, when the nonequilibrium thermal effects are important. I find that the number density of the ultralight ... |
1504.05284 | Hongwei Yu | Qihong Huang, Puxun Wu and Hongwei Yu | Emergent scenario in the Einstein-Cartan theory | 16 pages, 5 figures, to appear in PRD | Physical Review D 91, 103502 (2015) | 10.1103/PhysRevD.91.103502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the emergent scenario, which is proposed to avoid the big bang
singularity, in the Einstein-Cartan (EC) theory with a positive cosmological
constant and a perfect fluid by analyzing the existence and stability of the
Einstein static (ES) solutions. We find that there is no stable ES solution for
a spatially ... | [
{
"created": "Tue, 21 Apr 2015 02:49:07 GMT",
"version": "v1"
}
] | 2015-10-19 | [
[
"Huang",
"Qihong",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | We study the emergent scenario, which is proposed to avoid the big bang singularity, in the Einstein-Cartan (EC) theory with a positive cosmological constant and a perfect fluid by analyzing the existence and stability of the Einstein static (ES) solutions. We find that there is no stable ES solution for a spatially fl... |
0707.1351 | Mustapha Ishak | James Richardson and Mustapha Ishak (The University of Texas at
Dallas) | Inverse approach to Einstein's equations for fluids with vanishing
anisotropic stress tensor | 15 pages, matches version to appear in Phys.Rev.D | Phys.Rev.D77:044005,2008 | 10.1103/PhysRevD.77.044005 | null | gr-qc astro-ph.CO | null | We expand previous work on an inverse approach to Einstein Field Equations
where we include fluids with energy flux and consider the vanishing of the
anisotropic stress tensor. We consider the approach using warped product
spacetimes of class $B_1$. Although restricted, these spacetimes include many
exact solutions o... | [
{
"created": "Tue, 10 Jul 2007 00:31:17 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Dec 2007 17:29:40 GMT",
"version": "v2"
}
] | 2011-02-01 | [
[
"Richardson",
"James",
"",
"The University of Texas at\n Dallas"
],
[
"Ishak",
"Mustapha",
"",
"The University of Texas at\n Dallas"
]
] | We expand previous work on an inverse approach to Einstein Field Equations where we include fluids with energy flux and consider the vanishing of the anisotropic stress tensor. We consider the approach using warped product spacetimes of class $B_1$. Although restricted, these spacetimes include many exact solutions of ... |
0911.0473 | L\'aszl\'o \'A Gergely | L\'aszl\'o Ver\'eb, Zolt\'an Keresztes, P\'eter Raffai, Szabolcs
M\'esz\'aros, L\'aszl\'o \'A. Gergely | Recovering a spinning inspiralling compact binary waveform immersed in
LIGO-like noise with spinning templates | 5 pages, 1 figure + 4 figure panels; Proceedings of the Eight Edoardo
Amaldi Conference on Gravitational Waves (Amaldi8), New York, 2009; to be
published in J. Phys.: Conf. Series (JPCS) | J.Phys.Conf.Ser.228:012003,2010 | 10.1088/1742-6596/228/1/012003 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the recovery chances of highly spinning waveforms immersed in
LIGO S5-like noise by performing a matched filtering with 10^6 randomly chosen
spinning waveforms generated with the LAL package. While the masses of the
compact binary are reasonably well recovered (slightly overestimated), the same
does no... | [
{
"created": "Tue, 3 Nov 2009 02:58:07 GMT",
"version": "v1"
},
{
"created": "Tue, 11 May 2010 05:58:02 GMT",
"version": "v2"
},
{
"created": "Wed, 12 May 2010 07:38:43 GMT",
"version": "v3"
}
] | 2010-08-05 | [
[
"Veréb",
"László",
""
],
[
"Keresztes",
"Zoltán",
""
],
[
"Raffai",
"Péter",
""
],
[
"Mészáros",
"Szabolcs",
""
],
[
"Gergely",
"László Á.",
""
]
] | We investigate the recovery chances of highly spinning waveforms immersed in LIGO S5-like noise by performing a matched filtering with 10^6 randomly chosen spinning waveforms generated with the LAL package. While the masses of the compact binary are reasonably well recovered (slightly overestimated), the same does not ... |
2401.08106 | Martin Kr\v{s}\v{s}\'ak | Martin Kr\v{s}\v{s}\'ak | Teleparallel Gravity, Covariance and Their Geometrical Meaning | 21 pages, to appear in "Tribute to Ruben Aldrovandi", F. Caruso, J.G.
Pereira and A. Santoro (Eds.) (Editora Livraria da F\'isica, S\~ao Paulo,
2024) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We explore the geometrical meaning of teleparallel geometries and the role of
covariance in their definition. We argue that pure gauge connections are a
necessary ingredient for describing geometry and gravity in terms of torsion
and non-metricity. We show the other viable alternative is using the Einstein
and Moller... | [
{
"created": "Tue, 16 Jan 2024 04:18:47 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Krššák",
"Martin",
""
]
] | We explore the geometrical meaning of teleparallel geometries and the role of covariance in their definition. We argue that pure gauge connections are a necessary ingredient for describing geometry and gravity in terms of torsion and non-metricity. We show the other viable alternative is using the Einstein and Moller L... |
2311.11830 | Yongqiang Wang | Jun-Ru Chen, Shi-Xian Sun, Long-Xing Huang, Yong-Qiang Wang | Tidal Love numbers of Axion stars | 22 pages, 5 figures | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the tidal deformability of spherically symmetric axion stars
on the stable branches, including the Newtonian and relativistic branches. The
results suggest that on the stable branch, the electric Love numbers of axion
star are positive, while the magnetic Love numbers are negative. On the
Newtonian sta... | [
{
"created": "Mon, 20 Nov 2023 15:05:02 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Chen",
"Jun-Ru",
""
],
[
"Sun",
"Shi-Xian",
""
],
[
"Huang",
"Long-Xing",
""
],
[
"Wang",
"Yong-Qiang",
""
]
] | We investigate the tidal deformability of spherically symmetric axion stars on the stable branches, including the Newtonian and relativistic branches. The results suggest that on the stable branch, the electric Love numbers of axion star are positive, while the magnetic Love numbers are negative. On the Newtonian stabl... |
1804.04877 | Archisman Ghosh | Ka Wa Tsang, Michiel Rollier, Archisman Ghosh, Anuradha Samajdar,
Michalis Agathos, Katerina Chatziioannou, Vitor Cardoso, Gaurav Khanna, Chris
Van Den Broeck | A morphology-independent data analysis method for detecting and
characterizing gravitational wave echoes | 5 pages, 4 figures | Phys. Rev. D 98, 024023 (2018) | 10.1103/PhysRevD.98.024023 | LIGO-P1800089 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ability to directly detect gravitational waves has enabled us to
empirically probe the nature of ultra-compact relativistic objects. Several
alternatives to the black holes of classical general relativity have been
proposed which do not have a horizon, in which case a newly formed object (e.g.
as a result of bina... | [
{
"created": "Fri, 13 Apr 2018 10:37:57 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Tsang",
"Ka Wa",
""
],
[
"Rollier",
"Michiel",
""
],
[
"Ghosh",
"Archisman",
""
],
[
"Samajdar",
"Anuradha",
""
],
[
"Agathos",
"Michalis",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Cardoso",
"Vitor",
... | The ability to directly detect gravitational waves has enabled us to empirically probe the nature of ultra-compact relativistic objects. Several alternatives to the black holes of classical general relativity have been proposed which do not have a horizon, in which case a newly formed object (e.g. as a result of binary... |
gr-qc/0402005 | Theodore A. Jacobson | T. Jacobson and D. Mattingly | Einstein-Aether Waves | 5 pages; v2: Remarks added concerning gauge invariance of the waves
and hyperbolicity of the equations. Essentially the version published in PRD | Phys.Rev.D70:024003,2004 | 10.1103/PhysRevD.70.024003 | null | gr-qc astro-ph hep-th | null | Local Lorentz invariance violation can be realized by introducing extra
tensor fields in the action that couple to matter. If the Lorentz violation is
rotationally invariant in some frame, then it is characterized by an
``aether'', i.e. a unit timelike vector field. General covariance requires that
the aether field b... | [
{
"created": "Tue, 3 Feb 2004 12:19:08 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jul 2004 12:04:12 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jacobson",
"T.",
""
],
[
"Mattingly",
"D.",
""
]
] | Local Lorentz invariance violation can be realized by introducing extra tensor fields in the action that couple to matter. If the Lorentz violation is rotationally invariant in some frame, then it is characterized by an ``aether'', i.e. a unit timelike vector field. General covariance requires that the aether field be ... |
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