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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2310.15282 | Emmanuel Tassone | Emmanuel A. Tassone and Carlos N. Kozameh | Final velocity and radiated energy in numerical simulations of binary
black holes | 12 pages, 16 figures | Physical Review D 105.4 (2022): 044044 | 10.1103/PhysRevD.105.044044 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The evolution of global binary black holes variables such as energy or linear
momentum are mainly obtained by applying numerical methods near coalescence,
post-Newtonian (PN) expansions, or a combination of both. In this paper, we use
a fully relativistic formalism presented several years ago that only uses
global va... | [
{
"created": "Mon, 23 Oct 2023 18:38:59 GMT",
"version": "v1"
}
] | 2023-10-25 | [
[
"Tassone",
"Emmanuel A.",
""
],
[
"Kozameh",
"Carlos N.",
""
]
] | The evolution of global binary black holes variables such as energy or linear momentum are mainly obtained by applying numerical methods near coalescence, post-Newtonian (PN) expansions, or a combination of both. In this paper, we use a fully relativistic formalism presented several years ago that only uses global vari... |
gr-qc/0505025 | Muzaffer Adak | Muzaffer Adak, Mestan Kalay and Ozcan Sert (Pamukkale Unv., Turkey) | Lagrange formulation of the symmetric teleparallel gravity | Corrected typos, Accepted for publication in IJMP-D | Int.J.Mod.Phys. D15 (2006) 619-634 | 10.1142/S0218271806008474 | null | gr-qc | null | We develop a symmetric teleparallel gravity model in a space-time with only
the non-metricity is nonzero, in terms of a Lagrangian quadratic in the
non-metricity tensor. We present a detailed discussion of the variations that
may be used for any gravitational formulation. We seek Schwarzschild-type
solutions because ... | [
{
"created": "Thu, 5 May 2005 10:41:26 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2005 08:25:40 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Feb 2006 08:40:46 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Adak",
"Muzaffer",
"",
"Pamukkale Unv., Turkey"
],
[
"Kalay",
"Mestan",
"",
"Pamukkale Unv., Turkey"
],
[
"Sert",
"Ozcan",
"",
"Pamukkale Unv., Turkey"
]
] | We develop a symmetric teleparallel gravity model in a space-time with only the non-metricity is nonzero, in terms of a Lagrangian quadratic in the non-metricity tensor. We present a detailed discussion of the variations that may be used for any gravitational formulation. We seek Schwarzschild-type solutions because of... |
2111.10744 | Peng Liu | Cheng-Yong Zhang, Peng Liu, Yunqi Liu, Chao Niu, Bin Wang | Dynamical scalarization in Einstein-Maxwell-dilaton theory | 19 pages, 5 figures | null | 10.1103/PhysRevD.105.024073 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the process of fully nonlinear dynamical scalarization starting from
a charged black hole or a naked singularity in asymptotically flat spacetime in
the Einstein-Maxwell-dilaton theory. Initially the dilaton field is negligible
compared to the gravitational and the Maxwell field. Then the dilaton field
exper... | [
{
"created": "Sun, 21 Nov 2021 05:43:48 GMT",
"version": "v1"
}
] | 2022-02-09 | [
[
"Zhang",
"Cheng-Yong",
""
],
[
"Liu",
"Peng",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Niu",
"Chao",
""
],
[
"Wang",
"Bin",
""
]
] | We study the process of fully nonlinear dynamical scalarization starting from a charged black hole or a naked singularity in asymptotically flat spacetime in the Einstein-Maxwell-dilaton theory. Initially the dilaton field is negligible compared to the gravitational and the Maxwell field. Then the dilaton field experie... |
gr-qc/0207072 | Nicola Pinamonti | V. Moretti and N. Pinamonti | Aspects of hidden and manifest SL(2,R) symmetry in 2D near-horizon
black-hole background | 22 pages, 1 figure, latex 2e, some misprint corrected, a reference
and a footnote added | Nucl.Phys. B647 (2002) 131-152 | 10.1016/S0550-3213(02)00940-9 | UTM 624 / UTF 449 | gr-qc hep-th math-ph math.MP | null | The invariance under unitary representations of the conformal group SL(2,R)
of a quantum particle is rigorously investigated in two-dimensional spacetimes
containing Killing horizons using DFF model. The limit of the near-horizon
approximation is considered. If the Killing horizon is bifurcate the conformal
symmetry ... | [
{
"created": "Thu, 18 Jul 2002 14:42:55 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2002 14:02:27 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Moretti",
"V.",
""
],
[
"Pinamonti",
"N.",
""
]
] | The invariance under unitary representations of the conformal group SL(2,R) of a quantum particle is rigorously investigated in two-dimensional spacetimes containing Killing horizons using DFF model. The limit of the near-horizon approximation is considered. If the Killing horizon is bifurcate the conformal symmetry is... |
gr-qc/0606077 | Allan Widom | A. Widom | Concepts of Intertial and Gravitational Mass | LaTeX Format No Figures | null | null | null | gr-qc | null | The general relativistic notion of gravitational and inertial mass is
discussed from the general viewpoint of the tidal forces implicit in the
curvature and the Einstein field equations within ponderable matter. A simple
yet rigorously general derivation is given for the Tolman gravitational mass
viewpoint wherein th... | [
{
"created": "Sat, 17 Jun 2006 17:57:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Widom",
"A.",
""
]
] | The general relativistic notion of gravitational and inertial mass is discussed from the general viewpoint of the tidal forces implicit in the curvature and the Einstein field equations within ponderable matter. A simple yet rigorously general derivation is given for the Tolman gravitational mass viewpoint wherein the ... |
2304.13320 | Kanishk Verma | S. Habib Mazharimousavi and Kanishk Verma | Magnetic black hole in Einstein-Dilaton-Square root nonlinear
electrodynamics | Final version accepted for publication in Annals of Physics. 12 pages
1 figure | null | 10.1016/j.aop.2023.169439 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the most general action in Einstein-Dilaton-Nonlinear
Electrodynamics (NED) theory, we obtain the field equations. We apply the field
equations for the specific NED known as the Liouville type plus a cosmological
constant and solve the field equations. With a pure magnetic field it is shown
that the squ... | [
{
"created": "Wed, 26 Apr 2023 06:47:54 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jul 2023 10:03:56 GMT",
"version": "v2"
}
] | 2023-08-15 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Verma",
"Kanishk",
""
]
] | Starting from the most general action in Einstein-Dilaton-Nonlinear Electrodynamics (NED) theory, we obtain the field equations. We apply the field equations for the specific NED known as the Liouville type plus a cosmological constant and solve the field equations. With a pure magnetic field it is shown that the squar... |
gr-qc/0101008 | Jerzy Lewandowski | Jerzy Lewandowski, Tomasz Pawlowski (Waszawa) | Geometric Characterizations of the Kerr Isolated Horizon | 11 pages, relevance of the results for the numerical relativity
explained, mistakes corrected | Int.J.Mod.Phys. D11 (2002) 739-746 | 10.1142/S0218271802001986 | null | gr-qc | null | We formulate conditions on the geometry of a non-expanding horizon $\Delta$
which are sufficient for the space-time metric to coincide on $\Delta$ with the
Kerr metric. We introduce an invariant which can be used as a measure of how
different the geometry of a given non-expanding horizon is from the geometry of
the K... | [
{
"created": "Sun, 31 Dec 2000 20:57:47 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2001 17:10:43 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Dec 2001 11:00:02 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Lewandowski",
"Jerzy",
"",
"Waszawa"
],
[
"Pawlowski",
"Tomasz",
"",
"Waszawa"
]
] | We formulate conditions on the geometry of a non-expanding horizon $\Delta$ which are sufficient for the space-time metric to coincide on $\Delta$ with the Kerr metric. We introduce an invariant which can be used as a measure of how different the geometry of a given non-expanding horizon is from the geometry of the Ker... |
gr-qc/0102082 | Hirayama Tooru | T.Hirayama (Kyoto Sangyo U.) | Bound and Radiation Fields in the Rindler Frame | 30 pages 2 figures | Prog.Theor.Phys. 106 (2001) 71 | 10.1143/PTP.106.71 | null | gr-qc physics.class-ph | null | The energy-momentum tensor of the Li\'enard-Wiechert field is split into
bound and emitted parts in the Rindler frame, by generalizing the reasoning of
Teitelboim applied in the inertial frame. Our analysis proceeds by invoking the
concept of ``energy'' defined with respect to the Killing vector field attached
to the... | [
{
"created": "Mon, 19 Feb 2001 12:43:58 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Aug 2001 12:35:35 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Hirayama",
"T.",
"",
"Kyoto Sangyo U."
]
] | The energy-momentum tensor of the Li\'enard-Wiechert field is split into bound and emitted parts in the Rindler frame, by generalizing the reasoning of Teitelboim applied in the inertial frame. Our analysis proceeds by invoking the concept of ``energy'' defined with respect to the Killing vector field attached to the f... |
2108.08328 | Fabrizio Corelli | Fabrizio Corelli, Taishi Ikeda and Paolo Pani | Challenging the cosmic censorship in Einstein-Maxwell-scalar theory with
numerically simulated gedankenexperiments | 18 pages, 14 figures. Animations and extra material available at
https://web.uniroma1.it/gmunu/ | null | 10.1103/PhysRevD.104.084069 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform extensive nonlinear numerical simulations of the spherical
collapse of (charged) wavepackets onto a charged black hole within
Einstein-Maxwell theory and in Einstein-Maxwell-scalar theory featuring
nonminimal couplings and a spontaneous scalarization mechanism. We confirm that
black holes in full-fledged E... | [
{
"created": "Wed, 18 Aug 2021 18:06:42 GMT",
"version": "v1"
}
] | 2021-11-03 | [
[
"Corelli",
"Fabrizio",
""
],
[
"Ikeda",
"Taishi",
""
],
[
"Pani",
"Paolo",
""
]
] | We perform extensive nonlinear numerical simulations of the spherical collapse of (charged) wavepackets onto a charged black hole within Einstein-Maxwell theory and in Einstein-Maxwell-scalar theory featuring nonminimal couplings and a spontaneous scalarization mechanism. We confirm that black holes in full-fledged Ein... |
0704.2499 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Electromagnetic Dark Energy and Gravitoelectrodynamics of
Superconductors | 9 pages | null | null | null | gr-qc | null | It is shown that Beck and Mackey electromagnetic model of dark energy in
superconductors can account for the non-classical inertial properties of
superconductors, which have been conjectured by the author to explain the
Cooper pair's mass excess reported by Cabrera and Tate. A new Einstein-Planck
regime for gravitati... | [
{
"created": "Thu, 19 Apr 2007 10:32:30 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jul 2007 14:15:19 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Aug 2007 12:38:27 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Aug 2007 14:19:21 GMT",
"version": "v4"
},
{
"cre... | 2007-10-29 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | It is shown that Beck and Mackey electromagnetic model of dark energy in superconductors can account for the non-classical inertial properties of superconductors, which have been conjectured by the author to explain the Cooper pair's mass excess reported by Cabrera and Tate. A new Einstein-Planck regime for gravitation... |
2205.12115 | Albert Munyeshyaka Mr | Beatrice Murorunkwere, Fidele Twagirayezu, Albert Munyeshyaka, Joseph
Ntahompagaze, Abraham Ayirwanda | On inflationary parameters in scalar-tensor theories | $27$ pages, $7$ figures | null | 10.1142/S0219887822501456 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The equivalence between $f(R)$ and scalar-tensor theories is revisited, we
consequently explored different $f(R)$ models. After consideration of specific
definition of the scalar field, we derived the potentials $V(\phi)$ for each
$f(R)$ model focusing on the early Universe, mostly the inflation epoch. For a
given po... | [
{
"created": "Tue, 24 May 2022 14:46:18 GMT",
"version": "v1"
}
] | 2022-09-20 | [
[
"Murorunkwere",
"Beatrice",
""
],
[
"Twagirayezu",
"Fidele",
""
],
[
"Munyeshyaka",
"Albert",
""
],
[
"Ntahompagaze",
"Joseph",
""
],
[
"Ayirwanda",
"Abraham",
""
]
] | The equivalence between $f(R)$ and scalar-tensor theories is revisited, we consequently explored different $f(R)$ models. After consideration of specific definition of the scalar field, we derived the potentials $V(\phi)$ for each $f(R)$ model focusing on the early Universe, mostly the inflation epoch. For a given pote... |
1912.08988 | Christopher Pope | M. Cvetic, G.W. Gibbons, C.N. Pope and B.F. Whiting | Positive Energy Functional for Massless Scalars in Rotating Black Hole
Backgrounds of Maximal Ungauged Supergravity | 5 pages, minor corrections and clarifications. Title changed. Version
to appear in Phys. Rev. Lett | Phys. Rev. Lett. 124, 231102 (2020) | 10.1103/PhysRevLett.124.231102 | UPR-1301-T, MI-TH-1943 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We outline a proof of the stability of a massless neutral scalar field $\psi$
in the background of a wide class of four dimensional asymptotically flat
rotating and ``electrically charged'' solutions of supergravity, and the low
energy limit of string theory, known as STU metrics. Despite their complexity,
we find it... | [
{
"created": "Thu, 19 Dec 2019 02:08:32 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jan 2020 15:14:07 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Jun 2020 13:41:01 GMT",
"version": "v3"
}
] | 2020-07-01 | [
[
"Cvetic",
"M.",
""
],
[
"Gibbons",
"G. W.",
""
],
[
"Pope",
"C. N.",
""
],
[
"Whiting",
"B. F.",
""
]
] | We outline a proof of the stability of a massless neutral scalar field $\psi$ in the background of a wide class of four dimensional asymptotically flat rotating and ``electrically charged'' solutions of supergravity, and the low energy limit of string theory, known as STU metrics. Despite their complexity, we find it p... |
2301.05243 | Fech Scen Khoo | Bahareh Azad, Jose Luis Bl\'azquez-Salcedo, Fech Scen Khoo, Jutta Kunz | Are slowly rotating Ellis-Bronnikov wormholes stable? | 6 pages, 3 figures; v2: equations added, minor typos corrected,
results unchanged, matches published version | null | 10.1016/j.physletb.2023.138349 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the radial perturbations of Ellis-Bronnikov wormholes
($\mathrm{l}=0$) in a slowly rotating background expanded up to second order in
rotation. We find indications that simple wormhole solutions such as
Ellis-Bronnikov in General Relativity can be stabilized by rotation, thus
favoring a viable traversa... | [
{
"created": "Thu, 12 Jan 2023 19:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Nov 2023 14:36:59 GMT",
"version": "v2"
}
] | 2023-11-27 | [
[
"Azad",
"Bahareh",
""
],
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Khoo",
"Fech Scen",
""
],
[
"Kunz",
"Jutta",
""
]
] | We investigate the radial perturbations of Ellis-Bronnikov wormholes ($\mathrm{l}=0$) in a slowly rotating background expanded up to second order in rotation. We find indications that simple wormhole solutions such as Ellis-Bronnikov in General Relativity can be stabilized by rotation, thus favoring a viable traversabl... |
1710.09432 | Carlos Palenzuela | Carlos Palenzuela, Paolo Pani, Miguel Bezares, Vitor Cardoso, Luis
Lehner and Steven Liebling | Gravitational Wave Signatures of Highly Compact Boson Star Binaries | 16 pages, 10 figures | Phys. Rev. D 96, 104058 (2017) | 10.1103/PhysRevD.96.104058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solitonic boson stars are stable objects made of a complex scalar field with
a compactness that can reach values comparable to that of neutron stars. A
recent study of the collision of identical boson stars produced only
non-rotating boson stars or black holes, suggesting that rotating boson stars
may not form from b... | [
{
"created": "Wed, 25 Oct 2017 19:39:29 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Palenzuela",
"Carlos",
""
],
[
"Pani",
"Paolo",
""
],
[
"Bezares",
"Miguel",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Lehner",
"Luis",
""
],
[
"Liebling",
"Steven",
""
]
] | Solitonic boson stars are stable objects made of a complex scalar field with a compactness that can reach values comparable to that of neutron stars. A recent study of the collision of identical boson stars produced only non-rotating boson stars or black holes, suggesting that rotating boson stars may not form from bin... |
gr-qc/0002051 | Andrzej Woszczyna | Zdzislaw A. Golda, Andrzej Woszczyna | Acoustics of early universe. II. Lifshitz vs. gauge-invariant theories | null | J.Math.Phys. 42 (2001) 856-862 | 10.1063/1.1335557 | null | gr-qc astro-ph math-ph math.MP | null | Appealing to classical methods of order reduction, we reduce the Lifshitz
system to a second order differential equation. We demonstrate its equivalence
to well known gauge-invariant results. For a radiation dominated universe we
express the metric and density corrections in their exact forms and discuss
their acoust... | [
{
"created": "Tue, 15 Feb 2000 11:52:16 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Apr 2000 08:41:29 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Golda",
"Zdzislaw A.",
""
],
[
"Woszczyna",
"Andrzej",
""
]
] | Appealing to classical methods of order reduction, we reduce the Lifshitz system to a second order differential equation. We demonstrate its equivalence to well known gauge-invariant results. For a radiation dominated universe we express the metric and density corrections in their exact forms and discuss their acoustic... |
gr-qc/0405005 | James W. York Jr. | James W. York | The Initial Value Problem Using Metric and Extrinsic Curvature | 10 pages, to appear in the Proceedings of the Tenth Marcel Grossmann
Meeting on General Relativity | null | 10.1142/9789812704030_0001 | null | gr-qc | null | The initial value problem is introduced after a thorough review of the
essential geometry. The initial value equations are put into elliptic form
using both conformal transformations and a treatment of the extrinsic curvature
introduced recently. This use of the metric and the extrinsic curvature is
manifestly equiva... | [
{
"created": "Sat, 1 May 2004 19:48:56 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"York",
"James W.",
""
]
] | The initial value problem is introduced after a thorough review of the essential geometry. The initial value equations are put into elliptic form using both conformal transformations and a treatment of the extrinsic curvature introduced recently. This use of the metric and the extrinsic curvature is manifestly equivale... |
gr-qc/0008035 | Irina Radinschi | I. Radinschi | The Energy of a Dyonic Dilaton Black Hole | 8 pages, no figures | Acta Phys.Slov. 49 (1999) 789-794 | null | null | gr-qc | null | We calculate the energy distribution of a dyonic dilaton black hole by using
the Tolman's energy-momentum complex. All the calculations are performed in
quasi-Cartesian coordinates. The energy distribution of the dyonic dilaton
black hole depends on the mass, electric charge, magnetic charge and asymptotic
value of t... | [
{
"created": "Tue, 15 Aug 2000 14:16:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Radinschi",
"I.",
""
]
] | We calculate the energy distribution of a dyonic dilaton black hole by using the Tolman's energy-momentum complex. All the calculations are performed in quasi-Cartesian coordinates. The energy distribution of the dyonic dilaton black hole depends on the mass, electric charge, magnetic charge and asymptotic value of the... |
2301.05923 | Tong Jiang | Tong Jiang, Yungui Gong, Xuchen Lu | Sky localization of space-based detectors with time-delay interferometry | 24 pages, 8 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The accurate sky localization of gravitational wave (GW) sources is an
important scientific goal for space-based GW detectors. Due to the effects of
gravity on three spacecrafts, it is hard to maintain the equality of the arm
length, so the time-delay interferometry (TDI) method is needed to cancel out
the laser freq... | [
{
"created": "Sat, 14 Jan 2023 14:10:15 GMT",
"version": "v1"
}
] | 2023-01-18 | [
[
"Jiang",
"Tong",
""
],
[
"Gong",
"Yungui",
""
],
[
"Lu",
"Xuchen",
""
]
] | The accurate sky localization of gravitational wave (GW) sources is an important scientific goal for space-based GW detectors. Due to the effects of gravity on three spacecrafts, it is hard to maintain the equality of the arm length, so the time-delay interferometry (TDI) method is needed to cancel out the laser freque... |
2405.00661 | Waleed Sherif | Hanno Sahlmann, Waleed Sherif | Towards quantum gravity with neural networks: Solving quantum Hamilton
constraints of 3d Euclidean gravity in the weak coupling limit | 46 pages, 14 figures | null | null | null | gr-qc hep-th physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider 3-dimensional Euclidean gravity in the weak coupling limit of
Smolin and show that it is BF-theory with $\text{U(1)}^3$ as a Lie group. The
theory is quantised using loop quantum gravity methods. The kinematical degrees
of freedom are truncated, on account of computational feasibility, by fixing a
graph a... | [
{
"created": "Wed, 1 May 2024 17:50:06 GMT",
"version": "v1"
}
] | 2024-05-02 | [
[
"Sahlmann",
"Hanno",
""
],
[
"Sherif",
"Waleed",
""
]
] | We consider 3-dimensional Euclidean gravity in the weak coupling limit of Smolin and show that it is BF-theory with $\text{U(1)}^3$ as a Lie group. The theory is quantised using loop quantum gravity methods. The kinematical degrees of freedom are truncated, on account of computational feasibility, by fixing a graph and... |
gr-qc/0002018 | T. P. Singh | T. P. Singh and Cenalo Vaz | Radiation flux and spectrum in the Vaidya collapse model | 10 pages, Latex File | Phys.Lett. B481 (2000) 74-78 | 10.1016/S0370-2693(00)00416-0 | null | gr-qc | null | We consider the quantization of a massless scalar field, using the geometric
optics approximation, in the background spacetime of a collapsing spherical
self-similar Vaidya star, which forms a black hole or a naked singularity. We
show that the outgoing radiation flux of the quantized scalar field diverges on
the Cau... | [
{
"created": "Thu, 3 Feb 2000 16:13:26 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Singh",
"T. P.",
""
],
[
"Vaz",
"Cenalo",
""
]
] | We consider the quantization of a massless scalar field, using the geometric optics approximation, in the background spacetime of a collapsing spherical self-similar Vaidya star, which forms a black hole or a naked singularity. We show that the outgoing radiation flux of the quantized scalar field diverges on the Cauch... |
1506.08094 | Jarmo M\"akel\"a Dr. | Jarmo M\"akel\"a | Thermodynamics of Spherically Symmetric Spacetimes in Loop Quantum
Gravity | 26 pages, no figures. Published in the Physical Review D. Comments
welcome | Phys. Rev. D 91, 124050 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The choice of the area operator in loop quantum gravity is by no means
unique. In addition to the area operator commonly used in loop quantum gravity
there is also an area operator introduced by Krasnov in 1998, which gives
uniformly spaced area spectra for the horizons of spacetime. Using Krasnov's
area operator we ... | [
{
"created": "Thu, 18 Jun 2015 08:12:59 GMT",
"version": "v1"
}
] | 2015-06-29 | [
[
"Mäkelä",
"Jarmo",
""
]
] | The choice of the area operator in loop quantum gravity is by no means unique. In addition to the area operator commonly used in loop quantum gravity there is also an area operator introduced by Krasnov in 1998, which gives uniformly spaced area spectra for the horizons of spacetime. Using Krasnov's area operator we co... |
0812.2121 | Ayan Chatterjee | Ayan Chatterjee and Amit Ghosh | Laws of Black Hole Mechanics from Holst Action | References added, Minor Corrections 25 pages 1 fig | Phys.Rev.D80:064036,2009 | 10.1103/PhysRevD.80.064036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formulation of Weak Isolated Horizons (WIH) based on the Isolated Horizon
formulation of black hole horizons is reconsidered. The first part of the paper
deals with the derivation of laws of mechanics of a WIH. While the zeroth law
follows from the WIH boundary conditions, first law depends on the action
chosen. ... | [
{
"created": "Thu, 11 Dec 2008 11:03:08 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2009 07:51:42 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"Chatterjee",
"Ayan",
""
],
[
"Ghosh",
"Amit",
""
]
] | The formulation of Weak Isolated Horizons (WIH) based on the Isolated Horizon formulation of black hole horizons is reconsidered. The first part of the paper deals with the derivation of laws of mechanics of a WIH. While the zeroth law follows from the WIH boundary conditions, first law depends on the action chosen. We... |
1510.06991 | Daniele Pranzetti | Daniele Oriti, Daniele Pranzetti, Lorenzo Sindoni | Horizon entropy from quantum gravity condensates | 6 pages; published version | Phys. Rev. Lett. 116, 211301 (2016) | 10.1103/PhysRevLett.116.211301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct condensate states encoding the continuum spherically symmetric
quantum geometry of an horizon in full quantum gravity, i.e. without any
classical symmetry reduction, in the group field theory formalism. Tracing over
the bulk degrees of freedom, we show how the resulting reduced density matrix
manifestly ... | [
{
"created": "Fri, 23 Oct 2015 16:56:34 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 2015 20:33:47 GMT",
"version": "v2"
},
{
"created": "Thu, 26 May 2016 08:32:21 GMT",
"version": "v3"
}
] | 2016-05-27 | [
[
"Oriti",
"Daniele",
""
],
[
"Pranzetti",
"Daniele",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | We construct condensate states encoding the continuum spherically symmetric quantum geometry of an horizon in full quantum gravity, i.e. without any classical symmetry reduction, in the group field theory formalism. Tracing over the bulk degrees of freedom, we show how the resulting reduced density matrix manifestly ex... |
gr-qc/0409011 | M. Meyer | S. Deser (Brandeis), R. Jackiw (MIT), S.-Y. Pi (Boston University) | Cotton Blend Gravity $pp$ Waves | 6 pages. Dedicated to Andrzej Staruszkiewicz, a pioneer in d=3
gravity, on his 65th birthday | ActaPhys.Polon.B36:27-34,2005 | null | BRX TH-546; MIT-CTP-3533; BUHEP-04-13 | gr-qc hep-th | null | We study conformal gravity in d=2+1, where the Cotton tensor is equated to
a--necessarily traceless--matter stress tensor, for us that of the improved
scalar field. We first solve this system exactly in the $pp$ wave regime, then
show it to be equivalent to topologically massive gravity.
| [
{
"created": "Thu, 2 Sep 2004 19:02:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Deser",
"S.",
"",
"Brandeis"
],
[
"Jackiw",
"R.",
"",
"MIT"
],
[
"Pi",
"S. -Y.",
"",
"Boston University"
]
] | We study conformal gravity in d=2+1, where the Cotton tensor is equated to a--necessarily traceless--matter stress tensor, for us that of the improved scalar field. We first solve this system exactly in the $pp$ wave regime, then show it to be equivalent to topologically massive gravity. |
gr-qc/0211098 | Allemandi Gianluca | G. Allemandi, M. Francaviglia, M. Raiteri | Covariant Charges in Chern-Simons AdS_3 Gravity | 30 pages, no figures. References added | Class.Quant.Grav. 20 (2003) 483-506 | 10.1088/0264-9381/20/3/307 | null | gr-qc hep-th | null | We try to give hereafter an answer to some open questions about the
definition of conserved quantities in Chern-Simons theory, with particular
reference to Chern-Simons AdS_3 Gravity. Our attention is focused on the
problem of global covariance and gauge invariance of the variation of Noether
charges. A theory which ... | [
{
"created": "Thu, 28 Nov 2002 11:23:22 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Dec 2002 14:22:56 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Allemandi",
"G.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Raiteri",
"M.",
""
]
] | We try to give hereafter an answer to some open questions about the definition of conserved quantities in Chern-Simons theory, with particular reference to Chern-Simons AdS_3 Gravity. Our attention is focused on the problem of global covariance and gauge invariance of the variation of Noether charges. A theory which sa... |
gr-qc/9503009 | Paulo Rodrigues Lima Vargas Moniz | A.D.Y. Cheng, P.D. D'Eath and P.R.L.V. Moniz (DAMTP-University of
Cambridge) | Quantization of a Friedmann-Robertson-Walker model in N=1 Supergravity
with Gauged Supermatter | 5 pages, Talk at the 1st Mexican School in Gravitation and
mathematical physics, Guanajuato, Mexico, December 12-16 1994 | null | 10.1088/0264-9381/12/6/003 | DAMTP R-94/45c | gr-qc | null | The theory of N = 1 supergravity with gauged supermatter is studied in the
context of a k = + 1 Friedmann minisuperspace model. It is found by imposing
the Lorentz and supersymmetry constraints that there are {\seveni no} physical
states in the particular SU(2) model studied.
| [
{
"created": "Mon, 6 Mar 1995 14:08:49 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Cheng",
"A. D. Y.",
"",
"DAMTP-University of\n Cambridge"
],
[
"D'Eath",
"P. D.",
"",
"DAMTP-University of\n Cambridge"
],
[
"Moniz",
"P. R. L. V.",
"",
"DAMTP-University of\n Cambridge"
]
] | The theory of N = 1 supergravity with gauged supermatter is studied in the context of a k = + 1 Friedmann minisuperspace model. It is found by imposing the Lorentz and supersymmetry constraints that there are {\seveni no} physical states in the particular SU(2) model studied. |
0903.3577 | Jiri Podolsky | Jiri Podolsky, Hedvika Kadlecova | Radiation generated by accelerating and rotating charged black holes in
(anti-)de Sitter space | 24 pages, 18 figures. To appear in Classical and Quantum Gravity | Class.Quant.Grav.26:105007,2009 | 10.1088/0264-9381/26/10/105007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Asymptotic behaviour of gravitational and electromagnetic fields of exact
type D solutions from the large Plebanski-Demianski family of black hole
spacetimes is analyzed. The amplitude and directional structure of radiation is
evaluated in cases when the cosmological constant is non-vanishing, so that the
conformal i... | [
{
"created": "Fri, 20 Mar 2009 17:39:15 GMT",
"version": "v1"
}
] | 2009-05-18 | [
[
"Podolsky",
"Jiri",
""
],
[
"Kadlecova",
"Hedvika",
""
]
] | Asymptotic behaviour of gravitational and electromagnetic fields of exact type D solutions from the large Plebanski-Demianski family of black hole spacetimes is analyzed. The amplitude and directional structure of radiation is evaluated in cases when the cosmological constant is non-vanishing, so that the conformal inf... |
1412.2427 | Molin Liu | Molin Liu, Yuling Yang, Jianbo Lv and Lixin Xu | Thermodynamics of Apparent Horizon and Friedmann Equations in Big Bounce
Universe | 15 pages, 2 figures. Accepted by General Relativity and Gravitation | Gen Relativ Gravit (2016) 48:59 | 10.1007/s10714-016-2055-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study a big bounce universe typified by a non-singular big
bounce, as opposed to a singular big bang. This cosmological model can describe
radiation dominated early universe and matter dominated late universe in FRW
model. The connections between thermodynamics and gravity are observed here. In
the ... | [
{
"created": "Mon, 8 Dec 2014 01:49:12 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Mar 2016 02:45:35 GMT",
"version": "v2"
}
] | 2016-04-15 | [
[
"Liu",
"Molin",
""
],
[
"Yang",
"Yuling",
""
],
[
"Lv",
"Jianbo",
""
],
[
"Xu",
"Lixin",
""
]
] | In this paper, we study a big bounce universe typified by a non-singular big bounce, as opposed to a singular big bang. This cosmological model can describe radiation dominated early universe and matter dominated late universe in FRW model. The connections between thermodynamics and gravity are observed here. In the ea... |
1104.0819 | Christopher Berry | Christopher P. L. Berry, Jonathan R. Gair | Linearized f(R) Gravity: Gravitational Radiation & Solar System Tests | 19 pages, 1 figure; typos in Sec. VIII. A. corrected | Phys.Rev.D83:104022,2011 | 10.1103/PhysRevD.83.104022 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the linearized form of metric f(R)-gravity, assuming that f(R)
is analytic about R = 0 so it may be expanded as f(R) = R + a_2 R^2/2 + ... .
Gravitational radiation is modified, admitting an extra mode of oscillation,
that of the Ricci scalar. We derive an effective energy-momentum tensor for the
radia... | [
{
"created": "Tue, 5 Apr 2011 12:13:15 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Apr 2011 17:22:30 GMT",
"version": "v2"
},
{
"created": "Tue, 17 May 2011 08:40:02 GMT",
"version": "v3"
},
{
"created": "Thu, 29 Mar 2012 17:07:42 GMT",
"version": "v4"
}
] | 2012-03-30 | [
[
"Berry",
"Christopher P. L.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | We investigate the linearized form of metric f(R)-gravity, assuming that f(R) is analytic about R = 0 so it may be expanded as f(R) = R + a_2 R^2/2 + ... . Gravitational radiation is modified, admitting an extra mode of oscillation, that of the Ricci scalar. We derive an effective energy-momentum tensor for the radiati... |
0909.2741 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev and Vladimir Folomeev | Spinor brane | errors are corrected | Gen.Rel.Grav.43:1253-1261,2011 | 10.1007/s10714-010-1105-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thick brane model supported by a nonlinear spinor field is constructed.
The different cases with the various values of the cosmological constant
$\Lambda (< = >) 0$ are investigated. It is shown that regular analytical
spinor thick brane solutions with asymptotically Minkowski (at $\Lambda=0$) or
anti-de Sitter s... | [
{
"created": "Tue, 15 Sep 2009 08:25:45 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2010 05:11:36 GMT",
"version": "v2"
}
] | 2011-04-25 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | The thick brane model supported by a nonlinear spinor field is constructed. The different cases with the various values of the cosmological constant $\Lambda (< = >) 0$ are investigated. It is shown that regular analytical spinor thick brane solutions with asymptotically Minkowski (at $\Lambda=0$) or anti-de Sitter spa... |
2205.15029 | Juan Calderon Bustillo | Juan Calderon Bustillo, Isaac C.F. Wong, Nicolas Sanchis-Gual, Samson
H.W. Leong, Alejandro Torres-Forne, Koustav Chandra, Jose A. Font, Carlos
Herdeiro, Eugen Radu and T.G.F. Li | Gravitational-wave parameter inference with the Newman-Penrose scalar
$\psi_4$ | Version accepted for publication in Physical Review X. 27 pages, 11
Figures, 3 Appendixes | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detection and parameter inference of gravitational-wave signals \ncor{from
compact mergers} rely on the comparison of the incoming detector strain data
$d(t)$ to waveform templates for the gravitational-wave strain $h(t)$ that
ultimately rely on the resolution of Einstein's equations via numerical
relativity simulati... | [
{
"created": "Mon, 30 May 2022 12:07:16 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jun 2022 12:17:56 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Oct 2023 15:36:20 GMT",
"version": "v3"
}
] | 2023-10-17 | [
[
"Bustillo",
"Juan Calderon",
""
],
[
"Wong",
"Isaac C. F.",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Leong",
"Samson H. W.",
""
],
[
"Torres-Forne",
"Alejandro",
""
],
[
"Chandra",
"Koustav",
""
],
[
"Font",
... | Detection and parameter inference of gravitational-wave signals \ncor{from compact mergers} rely on the comparison of the incoming detector strain data $d(t)$ to waveform templates for the gravitational-wave strain $h(t)$ that ultimately rely on the resolution of Einstein's equations via numerical relativity simulation... |
1405.2919 | Michael Grudich | Michael Grudich | Classical gravitational scattering in the relativistic Kepler problem | Undergraduate honours thesis. 74 pages plus source code, 27 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes are an ubiquitous end state of stellar evolution and successfully
explain some of the most extreme physics encountered in astronomical
observations. The Kerr geometry is the known exact solution to Einstein's
equations for a static, eternal black hole within the framework of general
relativity, and hence ... | [
{
"created": "Mon, 12 May 2014 18:03:27 GMT",
"version": "v1"
}
] | 2014-05-14 | [
[
"Grudich",
"Michael",
""
]
] | Black holes are an ubiquitous end state of stellar evolution and successfully explain some of the most extreme physics encountered in astronomical observations. The Kerr geometry is the known exact solution to Einstein's equations for a static, eternal black hole within the framework of general relativity, and hence is... |
gr-qc/0411051 | Donato Bini | Donato Bini and Robert T. Jantzen | Stationary spacetimes and the Simon tensor | To appear on the Proceedings of the International Conference in Honor
of Y. Choquet-Bruhat, "Analysis, Manifolds, and Geometric Structures in
Physics" Hotel Cala di Mola Porto Azzurro - Isola d'Elba June 24th-26th, 2004 | Nuovo Cim. B119 (2004) 863-873 | 10.1393/ncb/i2004-10183-9 | null | gr-qc | null | For stationary vacuum spacetimes the Bianchi identities of the second kind
equate the Simon tensor to the Simon-Mars tensor, the latter having a clear
geometrical interpretation. The equivalence of these two tensors is broken in
the nonvacuum case by additional source energy-momentum terms, but absorbing
these source... | [
{
"created": "Wed, 10 Nov 2004 08:39:13 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bini",
"Donato",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | For stationary vacuum spacetimes the Bianchi identities of the second kind equate the Simon tensor to the Simon-Mars tensor, the latter having a clear geometrical interpretation. The equivalence of these two tensors is broken in the nonvacuum case by additional source energy-momentum terms, but absorbing these source t... |
2306.04832 | Matteo Luca Ruggiero | Matteo Luca Ruggiero | Stationary rotating and axially symmetric dust systems as peculiar
General Relativistic objects | 13 pages; revised to match the version accepted for publication in
JCAP | JCAP02(2024)025 | 10.1088/1475-7516/2024/02/025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study an exact solution of Einstein's equations describing a
self-gravitating system, made of dust, distributed with axial symmetry and in
stationary rotation, and we prove that this type of system has no Newtonian
analogue. In a low-energy limit, its existence depends on the solution of a
Grad-Shafranov equation ... | [
{
"created": "Wed, 7 Jun 2023 23:23:07 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2024 18:56:42 GMT",
"version": "v2"
}
] | 2024-02-22 | [
[
"Ruggiero",
"Matteo Luca",
""
]
] | We study an exact solution of Einstein's equations describing a self-gravitating system, made of dust, distributed with axial symmetry and in stationary rotation, and we prove that this type of system has no Newtonian analogue. In a low-energy limit, its existence depends on the solution of a Grad-Shafranov equation in... |
1905.11443 | Ernesto Contreras | E. Contreras, J. M. Ramirez-Velasquez, \'A. Rinc\'on, G. Panotopoulos
and P. Bargue\~no | Black hole shadow of a rotating polytropic black hole by the
Newman--Janis algorithm without complexification | 9 pages, 2 figures, some references added | Eur. Phys. J. C (2019) 79: 802 | 10.1140/epjc/s10052-019-7309-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, starting from a spherically symmetric polytropic black hole, a
rotating solution is obtained by following the Newman--Janis algorithm without
complexification. Besides studying the horizon, the static conditions and
causality issues of the rotating solution, we obtain and discuss the shape of
its shadow... | [
{
"created": "Mon, 27 May 2019 18:43:37 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2019 16:05:53 GMT",
"version": "v2"
}
] | 2019-10-23 | [
[
"Contreras",
"E.",
""
],
[
"Ramirez-Velasquez",
"J. M.",
""
],
[
"Rincón",
"Á.",
""
],
[
"Panotopoulos",
"G.",
""
],
[
"Bargueño",
"P.",
""
]
] | In this work, starting from a spherically symmetric polytropic black hole, a rotating solution is obtained by following the Newman--Janis algorithm without complexification. Besides studying the horizon, the static conditions and causality issues of the rotating solution, we obtain and discuss the shape of its shadow. ... |
2107.04504 | Chandrasekhar Bhamidipati | Pavan Kumar Yerra and Chandrasekhar Bhamidipati | Novel relations in massive gravity at Hawking-Page transition | 22 pages, 8 figures | null | 10.1103/PhysRevD.104.104049 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Sign and magnitude of Ruppeiner's curvature $R_N$ is an empirical indicator
of the respective nature and strength of microstructures of a thermodynamic
system. For d-dimensional Schwarzschild black holes in AdS, $R_N$ at the
Hawking-Page (HP) transition point is a universal constant. In this article we
study the natu... | [
{
"created": "Fri, 9 Jul 2021 15:45:21 GMT",
"version": "v1"
}
] | 2021-12-08 | [
[
"Yerra",
"Pavan Kumar",
""
],
[
"Bhamidipati",
"Chandrasekhar",
""
]
] | Sign and magnitude of Ruppeiner's curvature $R_N$ is an empirical indicator of the respective nature and strength of microstructures of a thermodynamic system. For d-dimensional Schwarzschild black holes in AdS, $R_N$ at the Hawking-Page (HP) transition point is a universal constant. In this article we study the nature... |
gr-qc/0104020 | Bernd Bruegmann | Miguel Alcubierre, Bernd Bruegmann, Denis Pollney, Edward Seidel, and
Ryoji Takahashi | Black Hole Excision for Dynamic Black Holes | 5 pages, 7 figures, published version with changes to equation (2) | Phys.Rev.D64:061501,2001 | 10.1103/PhysRevD.64.061501 | AEI-2001-021 | gr-qc | null | We extend previous work on 3D black hole excision to the case of distorted
black holes, with a variety of dynamic gauge conditions that are able to
respond naturally to the spacetime dynamics. We show that the combination of
excision and gauge conditions we use is able to drive highly distorted,
rotating black holes ... | [
{
"created": "Thu, 5 Apr 2001 14:23:37 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jul 2002 09:10:10 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Pollney",
"Denis",
""
],
[
"Seidel",
"Edward",
""
],
[
"Takahashi",
"Ryoji",
""
]
] | We extend previous work on 3D black hole excision to the case of distorted black holes, with a variety of dynamic gauge conditions that are able to respond naturally to the spacetime dynamics. We show that the combination of excision and gauge conditions we use is able to drive highly distorted, rotating black holes to... |
gr-qc/9911032 | Lars Andersson | Lars Andersson (UM and AEI) | The global existence problem in general relativity | 49 pages, 12 figures, based on talk given at the Arthur L. Besse
Table Ronde de G\'eom\'etrie Pseudo-Riemannienne Globale, Nancy, June 1998.
Major revision, corresponds to published version | "50 years of the Cauchy problem in general relativity", eds.
Chrusciel and Friedrich, Birkhauser, Basel 2004, pp. 71-120 | null | null | gr-qc | null | We survey some known facts and open questions concerning the global
properties of 3+1 dimensional spacetimes containing a compact Cauchy surface.
We consider spacetimes with an $\ell$-dimensional Lie algebra of space-like
Killing fields. For each $\ell \leq 3$, we give some basic results and
conjectures on global exi... | [
{
"created": "Tue, 9 Nov 1999 14:25:00 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Nov 1999 13:28:32 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Feb 2000 08:06:00 GMT",
"version": "v3"
},
{
"created": "Fri, 28 Apr 2006 12:28:17 GMT",
"version": "v4"
}
] | 2009-09-25 | [
[
"Andersson",
"Lars",
"",
"UM and AEI"
]
] | We survey some known facts and open questions concerning the global properties of 3+1 dimensional spacetimes containing a compact Cauchy surface. We consider spacetimes with an $\ell$-dimensional Lie algebra of space-like Killing fields. For each $\ell \leq 3$, we give some basic results and conjectures on global exist... |
gr-qc/0207057 | Gennady L. Krasnikov | S. Krasnikov | The quantum inequalities do not forbid spacetime shortcuts | Minor corrections and additions | Phys.Rev. D67 (2003) 104013 | 10.1103/PhysRevD.67.104013 | null | gr-qc | null | A class of spacetimes (comprising the Alcubierre bubble, Krasnikov tube, and
a certain type of wormholes) is considered that admits `superluminal travel' in
a strictly defined sense. Such spacetimes (they are called `shortcuts' in this
paper) were suspected to be impossible because calculations based on `quantum
ineq... | [
{
"created": "Mon, 15 Jul 2002 22:25:04 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Nov 2002 21:25:08 GMT",
"version": "v2"
},
{
"created": "Mon, 19 May 2003 13:14:26 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Krasnikov",
"S.",
""
]
] | A class of spacetimes (comprising the Alcubierre bubble, Krasnikov tube, and a certain type of wormholes) is considered that admits `superluminal travel' in a strictly defined sense. Such spacetimes (they are called `shortcuts' in this paper) were suspected to be impossible because calculations based on `quantum inequa... |
2111.02805 | Ali \"Ovg\"un Dr. | Yashmitha Kumaran and Ali \"Ovg\"un | Deriving Weak Deflection Angle by Black Holes or Wormholes using
Gauss-Bonnet Theorem | 22 pages. Review Article. Accepted for publication in Turkish Journal
of Physics | Turk J Phys, 45, (2021), 247-267 | 10.3906/fiz-2110-16 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this review, various researches on finding the bending angle of light
deflected by a massive gravitating object which regard the Gauss-Bonnet theorem
as the premise have been revised. Primarily, the Gibbons and Werner method is
studied apropos of the gravitational lensing phenomenon in the weak field
limits. Some ... | [
{
"created": "Tue, 2 Nov 2021 18:44:27 GMT",
"version": "v1"
}
] | 2021-11-05 | [
[
"Kumaran",
"Yashmitha",
""
],
[
"Övgün",
"Ali",
""
]
] | In this review, various researches on finding the bending angle of light deflected by a massive gravitating object which regard the Gauss-Bonnet theorem as the premise have been revised. Primarily, the Gibbons and Werner method is studied apropos of the gravitational lensing phenomenon in the weak field limits. Some ex... |
2003.11452 | {\O}yvind Christiansen | {\O}yvind Christiansen, Jose Beltr\'an Jim\'enez, David F. Mota | Charged Black Hole Mergers: Orbit Circularisation and Chirp Mass Bias | 25 pages and 3 figures. For associated code, see
https://github.com/oyvach/matched-filtering-mock-bias | Class. Quantum Grav. 38 (2021) 075017 | 10.1088/1361-6382/abdaf5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the inspiral of black holes carrying U(1) charge that is not
electromagnetic, but corresponds to some dark sector. In the weak-field,
low-velocity regime, the components follow Keplerian orbits. We investigate how
the orbital parameters evolve for dipole-dominated emission and find that the
orbit quickly ... | [
{
"created": "Wed, 25 Mar 2020 15:42:45 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Sep 2020 10:12:56 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jan 2021 09:02:05 GMT",
"version": "v3"
}
] | 2021-03-23 | [
[
"Christiansen",
"Øyvind",
""
],
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Mota",
"David F.",
""
]
] | We consider the inspiral of black holes carrying U(1) charge that is not electromagnetic, but corresponds to some dark sector. In the weak-field, low-velocity regime, the components follow Keplerian orbits. We investigate how the orbital parameters evolve for dipole-dominated emission and find that the orbit quickly ci... |
0906.0005 | Barry Wardell | Adrian C. Ottewill, Barry Wardell | Transport Equation Approach to Calculations of Hadamard Green functions
and non-coincident DeWitt coefficients | 32 pages, 5 figures. Final published version with correction to Eq.
(3.24) | Phys. Rev. D 84, 104039 (2011) | 10.1103/PhysRevD.84.104039 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building on an insight due to Avramidi, we provide a system of transport
equations for determining key fundamental bi-tensors, including derivatives of
the world-function, \sigma(x,x'), the square root of the Van Vleck determinant,
\Delta^{1/2}(x,x'), and the tail-term, V(x,x'), appearing in the Hadamard form
of the ... | [
{
"created": "Fri, 29 May 2009 20:04:43 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2011 17:31:06 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Jul 2013 13:44:44 GMT",
"version": "v3"
},
{
"created": "Fri, 10 Jan 2020 17:43:33 GMT",
"version": "v4"
}
] | 2020-01-13 | [
[
"Ottewill",
"Adrian C.",
""
],
[
"Wardell",
"Barry",
""
]
] | Building on an insight due to Avramidi, we provide a system of transport equations for determining key fundamental bi-tensors, including derivatives of the world-function, \sigma(x,x'), the square root of the Van Vleck determinant, \Delta^{1/2}(x,x'), and the tail-term, V(x,x'), appearing in the Hadamard form of the Gr... |
1011.4348 | Zou De Cheng | De-Cheng Zou, Zhan-Ying Yang and Rui-Hong Yue | Thermodynamics of Slowly Rotating Charged Black Holes in anti-de Sitter
Einstein-Gauss-Bonnet Gravity | 9 Pages, submitted to Chin. Phys. Lett | Chin.Phys.Lett.28:020402,2011 | 10.1088/0256-307X/28/2/020402 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using a new approach, we demonstrate analytic expressions for slowly
rotating Gauss-Bonnet charged black holes with negative cosmological constant.
Up to the linear order of the rotating parameter a, the mass, Hawking
temperature and entropy of the charged black holes get no corrections from
rotation.
| [
{
"created": "Fri, 19 Nov 2010 06:10:25 GMT",
"version": "v1"
}
] | 2011-10-04 | [
[
"Zou",
"De-Cheng",
""
],
[
"Yang",
"Zhan-Ying",
""
],
[
"Yue",
"Rui-Hong",
""
]
] | By using a new approach, we demonstrate analytic expressions for slowly rotating Gauss-Bonnet charged black holes with negative cosmological constant. Up to the linear order of the rotating parameter a, the mass, Hawking temperature and entropy of the charged black holes get no corrections from rotation. |
2204.02225 | Peter Woit | Peter Woit | Is Space-time Really Doomed? | Essay written for the Gravity Research Foundation 2022 Awards for
Essays on Gravitation | null | 10.1142/S0218271822420056 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For many years now it has become conventional for theorists to argue that
"space-time is doomed", with the difficulties in finding a quantum theory of
gravity implying the necessity of basing a fundamental theory on something
quite different than usual notions of space-time geometry. But what is this
space-time geome... | [
{
"created": "Tue, 5 Apr 2022 13:59:38 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Woit",
"Peter",
""
]
] | For many years now it has become conventional for theorists to argue that "space-time is doomed", with the difficulties in finding a quantum theory of gravity implying the necessity of basing a fundamental theory on something quite different than usual notions of space-time geometry. But what is this space-time geometr... |
1312.6835 | Kourosh Nozari | M. A. Gorji, Kourosh Nozari and B. Vakili | Polymeric Quantization and Black Hole Thermodynamics | 13 pages, no figures, revised for PLB, title changed | Phys. Lett. B 735 (2014) 62 | 10.1016/j.physletb.2014.06.005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Polymer quantization is a non-standard representation of the quantum
mechanics that inspired by loop quantum gravity. To study the associated
statistical mechanics, one needs to find microstates' energies which are
eigenvalues of the Hamiltonian operator in the polymer framework. But, this is
not an easy task at all ... | [
{
"created": "Tue, 24 Dec 2013 15:04:31 GMT",
"version": "v1"
},
{
"created": "Sun, 18 May 2014 15:46:08 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Gorji",
"M. A.",
""
],
[
"Nozari",
"Kourosh",
""
],
[
"Vakili",
"B.",
""
]
] | Polymer quantization is a non-standard representation of the quantum mechanics that inspired by loop quantum gravity. To study the associated statistical mechanics, one needs to find microstates' energies which are eigenvalues of the Hamiltonian operator in the polymer framework. But, this is not an easy task at all si... |
gr-qc/0202053 | Bayram Tekin | S. Deser | Gauge Invariance with Mass: Higher Spins in Cosmological Spaces | 30 pages, 1 Fig, Expanded version, invited lecture, Francqui
Conference, "Strings and Gravity: Tying the Forces Together", Brussels,
October 2001 | Strings and Gravity (DeBoeck and Larcier, Brussels 2003) | null | BRX TH-498 | gr-qc | null | I review recent work on massive higher (s>1) spins in constant curvature
(deSitter) spaces. Some of the novel properties that emerge are: partial
masslessness and new local gauge invariances, unitarily forbidden ranges of
mass, correlation between fermions/bosons and nagative/positive cosmological
constant Lambda and... | [
{
"created": "Thu, 14 Feb 2002 20:56:47 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Deser",
"S.",
""
]
] | I review recent work on massive higher (s>1) spins in constant curvature (deSitter) spaces. Some of the novel properties that emerge are: partial masslessness and new local gauge invariances, unitarily forbidden ranges of mass, correlation between fermions/bosons and nagative/positive cosmological constant Lambda and f... |
1312.5428 | Luisa Jaime | Luisa G. Jaime, Leonardo Pati\~no and Marcelo Salgado | Note on the equation of state of geometric dark-energy in f(R) gravity | Submited to Phys. Rev. D | null | 10.1103/PhysRevD.89.084010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on the analysis of three inequivalent equations of state of
geometric dark energy in $f(R)$ cosmology that have been considered in the past
and discuss their differences, advantages and drawbacks.
| [
{
"created": "Thu, 19 Dec 2013 07:38:27 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Jaime",
"Luisa G.",
""
],
[
"Patiño",
"Leonardo",
""
],
[
"Salgado",
"Marcelo",
""
]
] | We focus on the analysis of three inequivalent equations of state of geometric dark energy in $f(R)$ cosmology that have been considered in the past and discuss their differences, advantages and drawbacks. |
1902.01576 | Gilbert Weinstein | Gilbert Weinstein | Harmonic maps with prescribed singularities and applications in general
relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a general existence and uniqueness result for harmonic
maps with prescribed singularities into non-positively curved targets, and
surveys a number of applications to general relativity. It is based on a talk
delivered by the author at The 11th Mathematical Society of Japan Seasonal
Institute, The ... | [
{
"created": "Tue, 5 Feb 2019 07:46:32 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Feb 2019 10:27:06 GMT",
"version": "v2"
}
] | 2019-02-11 | [
[
"Weinstein",
"Gilbert",
""
]
] | This paper presents a general existence and uniqueness result for harmonic maps with prescribed singularities into non-positively curved targets, and surveys a number of applications to general relativity. It is based on a talk delivered by the author at The 11th Mathematical Society of Japan Seasonal Institute, The Ro... |
1204.5767 | Stanley P. Gudder | Stan Gudder | Causal set approach to discrete quantum gravity | 19 pages, 1 figure | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We begin by describing a sequential growth model in which the universe grows
one element at a time in discrete time steps. At each step, the process has the
form of a causal set and the "completed" universe is given by a path consisting
of a discretely growing chain of causal sets. We then introduce a quantum
dynamic... | [
{
"created": "Wed, 25 Apr 2012 20:51:45 GMT",
"version": "v1"
}
] | 2012-04-27 | [
[
"Gudder",
"Stan",
""
]
] | We begin by describing a sequential growth model in which the universe grows one element at a time in discrete time steps. At each step, the process has the form of a causal set and the "completed" universe is given by a path consisting of a discretely growing chain of causal sets. We then introduce a quantum dynamics ... |
0710.1675 | Rafael Sorkin | Rafael D. Sorkin (Perimeter Institute and Syracuse University) | Is the cosmological "constant" a nonlocal quantum residue of
discreteness of the causal set type? | plainTeX, 13 pages. To appear in the proceedings of the PASCOS-07
Conference, held July, 2007, London, England. Most current version is
available at http://www.physics.syr.edu/~sorkin/some.papers/ (or wherever my
home-page may be) | AIPConf.Proc.957:142-153,2007 | 10.1063/1.2823750 | null | gr-qc astro-ph hep-th | null | The evidence for an accelerating Hubble expansion appears to have confirmed
the heuristic prediction, from causal set theory, of a fluctuating and
``ever-present'' cosmological term in the Einstein equations. A more concrete
phenomenological model incorporating this prediction has been devised and
tested, but it rema... | [
{
"created": "Tue, 9 Oct 2007 02:32:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sorkin",
"Rafael D.",
"",
"Perimeter Institute and Syracuse University"
]
] | The evidence for an accelerating Hubble expansion appears to have confirmed the heuristic prediction, from causal set theory, of a fluctuating and ``ever-present'' cosmological term in the Einstein equations. A more concrete phenomenological model incorporating this prediction has been devised and tested, but it remain... |
2309.00262 | Deborah Ferguson | Deborah Ferguson, Evelyn Allsup, Surendra Anne, Galina Bouyer, Miguel
Gracia-Linares, Hector Iglesias, Aasim Jan, Pablo Laguna, Jacob Lange, Erick
Martinez, Filippo Meoni, Ryan Nowicki, Deirdre Shoemaker, Blake Steadham, Max
L. Trostel, Bing-Jyun Tsao, and Finny Valorz | Second MAYA Catalog of Binary Black Hole Numerical Relativity Waveforms | 11 pages, 9 figures | null | null | UTWI-32-2023 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical relativity waveforms are a critical resource in the quest to deepen
our understanding of the dynamics of, and gravitational waves emitted from,
merging binary systems. We present 181 new numerical relativity simulations as
the second MAYA catalog of binary black hole waveforms (a sequel to the Georgia
Tech ... | [
{
"created": "Fri, 1 Sep 2023 05:40:06 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Sep 2023 18:15:10 GMT",
"version": "v2"
}
] | 2023-09-15 | [
[
"Ferguson",
"Deborah",
""
],
[
"Allsup",
"Evelyn",
""
],
[
"Anne",
"Surendra",
""
],
[
"Bouyer",
"Galina",
""
],
[
"Gracia-Linares",
"Miguel",
""
],
[
"Iglesias",
"Hector",
""
],
[
"Jan",
"Aasim",
""
],
... | Numerical relativity waveforms are a critical resource in the quest to deepen our understanding of the dynamics of, and gravitational waves emitted from, merging binary systems. We present 181 new numerical relativity simulations as the second MAYA catalog of binary black hole waveforms (a sequel to the Georgia Tech wa... |
2403.16522 | Umananda Dev Goswami | Gayatri Mohan and Umananda Dev Goswami | Galactic dynamics in the presence of scalaron: A perspective from
$\boldsymbol{f(R)}$ gravity | 21 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider $f(R)$ modified gravity with the chameleon mechanism as an
alternative approach to address the dark matter issue on the galactic scale.
Metric formalism of $f(R)$ theory is considered in this study. A mathematical
transformation tool called conformal transformation which transforms the action
from Jordan ... | [
{
"created": "Mon, 25 Mar 2024 08:05:08 GMT",
"version": "v1"
}
] | 2024-03-26 | [
[
"Mohan",
"Gayatri",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We consider $f(R)$ modified gravity with the chameleon mechanism as an alternative approach to address the dark matter issue on the galactic scale. Metric formalism of $f(R)$ theory is considered in this study. A mathematical transformation tool called conformal transformation which transforms the action from Jordan to... |
2210.08641 | Bing Tang | Jiayu Xie, Yaxuan Wang, Bing Tang | Chaotic dynamics of string around the Bardeen-AdS black holes surrounded
by quintessence dark energy | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of a ring string in the background of the Bardeen-AdS
black hole surrounded by the quintessence dark energy. The effects of the
magnetic monopole charge, the quintessence state parameter, and the
quintessence normalization parameter on the dynamical behavior of the ring
string are respectively ana... | [
{
"created": "Sun, 16 Oct 2022 21:24:16 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2022 18:22:07 GMT",
"version": "v2"
}
] | 2022-11-16 | [
[
"Xie",
"Jiayu",
""
],
[
"Wang",
"Yaxuan",
""
],
[
"Tang",
"Bing",
""
]
] | We study the motion of a ring string in the background of the Bardeen-AdS black hole surrounded by the quintessence dark energy. The effects of the magnetic monopole charge, the quintessence state parameter, and the quintessence normalization parameter on the dynamical behavior of the ring string are respectively analy... |
gr-qc/0304015 | Ingemar Bengtsson | Jan Aman, Ingemar Bengtsson and Narit Pidokrajt | Geometry of black hole thermodynamics | 13 pages, 2 figures | Gen.Rel.Grav.35:1733,2003 | 10.1023/A:1026058111582 | USITP 03-03 | gr-qc | null | The Hessian of the entropy function can be thought of as a metric tensor on
the state space. In the context of thermodynamical fluctuation theory Ruppeiner
has argued that the Riemannian geometry of this metric gives insight into the
underlying statistical mechanical system; the claim is supported by numerous
example... | [
{
"created": "Wed, 2 Apr 2003 18:16:05 GMT",
"version": "v1"
}
] | 2009-01-14 | [
[
"Aman",
"Jan",
""
],
[
"Bengtsson",
"Ingemar",
""
],
[
"Pidokrajt",
"Narit",
""
]
] | The Hessian of the entropy function can be thought of as a metric tensor on the state space. In the context of thermodynamical fluctuation theory Ruppeiner has argued that the Riemannian geometry of this metric gives insight into the underlying statistical mechanical system; the claim is supported by numerous examples.... |
1904.07876 | Daniele Teresi | Alessandro Strumia, Daniele Teresi | Cosmological constant: relaxation vs multiverse | 15 pages, 3 figures; published version | Phys. Lett. B797 (2019) 134901 | 10.1016/j.physletb.2019.134901 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a scalar field with a bottom-less potential, such as $g^3 \phi$,
finding that cosmologies unavoidably end up with a crunch, late enough to be
compatible with observations if $g \lesssim 1.2 H_0^{2/3} M_{\rm Pl}^{1/3}$. If
rebounces avoid singularities, the multiverse acquires new features; in
particular p... | [
{
"created": "Tue, 16 Apr 2019 18:00:03 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Aug 2019 08:44:10 GMT",
"version": "v2"
}
] | 2019-09-09 | [
[
"Strumia",
"Alessandro",
""
],
[
"Teresi",
"Daniele",
""
]
] | We consider a scalar field with a bottom-less potential, such as $g^3 \phi$, finding that cosmologies unavoidably end up with a crunch, late enough to be compatible with observations if $g \lesssim 1.2 H_0^{2/3} M_{\rm Pl}^{1/3}$. If rebounces avoid singularities, the multiverse acquires new features; in particular pro... |
gr-qc/0702100 | Raymond Chiao Y. | Raymond Y. Chiao | "Millikan oil drops" as quantum transducers between electromagnetic and
gravitational radiation | 31 pages, 4 figures | null | null | null | gr-qc | null | Pairs of Planck-mass-scale drops of superfluid helium coated by electrons
(i.e., "Millikan oil drops"), when levitated in the presence of strong magnetic
fields and at low temperatures, can be efficient quantum transducers between
electromagnetic (EM) and gravitational (GR) radiation. A Hertz-like experiment,
in whic... | [
{
"created": "Mon, 19 Feb 2007 18:17:17 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Feb 2007 21:53:39 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Chiao",
"Raymond Y.",
""
]
] | Pairs of Planck-mass-scale drops of superfluid helium coated by electrons (i.e., "Millikan oil drops"), when levitated in the presence of strong magnetic fields and at low temperatures, can be efficient quantum transducers between electromagnetic (EM) and gravitational (GR) radiation. A Hertz-like experiment, in which ... |
1905.09477 | Sunil Kumar Tripathy Dr. | Sunil Kumar Tripathy, Rakesh Kumar Khuntia and Priyabrata Parida | Bouncing cosmology in an Extended Theory of Gravity | 11 pages, 14 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated some bouncing models in the framework of an extended
gravity theory where the usual Ricci scalar in the gravitational action is
replaced by a sum of the Ricci scalar and a term proportional to the trace of
the energy momentum tensor. The dynamical parameters of the model are derived
in most gener... | [
{
"created": "Wed, 22 May 2019 04:19:38 GMT",
"version": "v1"
}
] | 2019-05-24 | [
[
"Tripathy",
"Sunil Kumar",
""
],
[
"Khuntia",
"Rakesh Kumar",
""
],
[
"Parida",
"Priyabrata",
""
]
] | We have investigated some bouncing models in the framework of an extended gravity theory where the usual Ricci scalar in the gravitational action is replaced by a sum of the Ricci scalar and a term proportional to the trace of the energy momentum tensor. The dynamical parameters of the model are derived in most general... |
gr-qc/0210040 | Valeri V. Kiselev | V.V.Kiselev | Quintessence and black holes | 11 pages, LaTeX file, 1 eps-figure, discussion and references added | Class.Quant.Grav.20:1187-1198,2003 | 10.1088/0264-9381/20/6/310 | null | gr-qc astro-ph hep-ph hep-th | null | We present new static spherically-symmetric exact solutions of Einstein
equations with the quintessential matter surrounding a black hole charged or
not as well as for the case without the black hole. A condition of additivity
and linearity in the energy-momentum tensor is introduced, which allows one to
get correct ... | [
{
"created": "Mon, 14 Oct 2002 10:23:42 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2002 08:57:49 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Dec 2002 12:13:50 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Kiselev",
"V. V.",
""
]
] | We present new static spherically-symmetric exact solutions of Einstein equations with the quintessential matter surrounding a black hole charged or not as well as for the case without the black hole. A condition of additivity and linearity in the energy-momentum tensor is introduced, which allows one to get correct li... |
gr-qc/0605133 | Saulo Carneiro | Saulo Carneiro | From de Sitter to de Sitter: A non-singular inflationary universe driven
by vacuum | This essay received an "honorable mention" in the 2006 Essay
Competition of the Gravity Research Foundation | Int.J.Mod.Phys.D15:2241-2247,2006 | 10.1142/S0218271806009510 | null | gr-qc astro-ph hep-th | null | A semi-classical analysis of vacuum energy in the expanding spacetime
suggests that the cosmological term decays with time, with a concomitant matter
production. For early times we find, in Planck units, $\Lambda \approx H^4$,
where H is the Hubble parameter. The corresponding cosmological solution has no
initial sin... | [
{
"created": "Fri, 26 May 2006 00:15:18 GMT",
"version": "v1"
},
{
"created": "Fri, 26 May 2006 21:02:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Carneiro",
"Saulo",
""
]
] | A semi-classical analysis of vacuum energy in the expanding spacetime suggests that the cosmological term decays with time, with a concomitant matter production. For early times we find, in Planck units, $\Lambda \approx H^4$, where H is the Hubble parameter. The corresponding cosmological solution has no initial singu... |
1002.2093 | Steven Hergt | Steven Hergt, Jan Steinhoff, Gerhard Schaefer | Reduced Hamiltonian for next-to-leading order Spin-Squared Dynamics of
General Compact Binaries | 11 pages, minor changes to match published version at CQG | Steven Hergt et al 2010 Class. Quantum Grav. 27 135007 | 10.1088/0264-9381/27/13/135007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the post Newtonian framework the fully reduced Hamiltonian (i.e., with
eliminated spin supplementary condition) for the next-to-leading order
spin-squared dynamics of general compact binaries is presented. The Hamiltonian
is applicable to the spin dynamics of all kinds of binaries with
self-gravitating compone... | [
{
"created": "Wed, 10 Feb 2010 13:37:27 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 2010 14:46:10 GMT",
"version": "v2"
}
] | 2010-06-04 | [
[
"Hergt",
"Steven",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Schaefer",
"Gerhard",
""
]
] | Within the post Newtonian framework the fully reduced Hamiltonian (i.e., with eliminated spin supplementary condition) for the next-to-leading order spin-squared dynamics of general compact binaries is presented. The Hamiltonian is applicable to the spin dynamics of all kinds of binaries with self-gravitating component... |
1807.04986 | Jake Dunn | Jake Dunn and Claude Warnick | Stability of the Toroidal AdS Schwarzschild Solution in the
Einstein--Klein-Gordon System | 68 pages, 9 figures | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the stability of the toroidal AdS-Schwarzshild black holes as
solutions of the Einstein--Klein-Gordon system, with Dirichlet or Neumann
boundary conditions for the scalar field. Restricting to perturbations that
respect the toroidal symmetry we show both orbital and asymptotic stability for
the full nonli... | [
{
"created": "Fri, 13 Jul 2018 09:42:04 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Nov 2018 17:50:15 GMT",
"version": "v2"
}
] | 2018-11-13 | [
[
"Dunn",
"Jake",
""
],
[
"Warnick",
"Claude",
""
]
] | We consider the stability of the toroidal AdS-Schwarzshild black holes as solutions of the Einstein--Klein-Gordon system, with Dirichlet or Neumann boundary conditions for the scalar field. Restricting to perturbations that respect the toroidal symmetry we show both orbital and asymptotic stability for the full nonline... |
2004.02411 | Pedro Bargueno | F. D. Villalba, P. Bargueno, A. F. Vargas and E. Contreras | Newman-Penrose scalars and black hole equations of state | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore the connections between Newman-Penrose scalars,
including the Penrose-Rindler $\mathcal{K}$-curvature, with the equation of
state of asymptotically Anti-de Sitter Reissner-Nordstr\"om black holes. After
briefly reviewing the equation of state for these black holes from the point of
view of bot... | [
{
"created": "Mon, 6 Apr 2020 06:02:36 GMT",
"version": "v1"
}
] | 2020-04-07 | [
[
"Villalba",
"F. D.",
""
],
[
"Bargueno",
"P.",
""
],
[
"Vargas",
"A. F.",
""
],
[
"Contreras",
"E.",
""
]
] | In this work we explore the connections between Newman-Penrose scalars, including the Penrose-Rindler $\mathcal{K}$-curvature, with the equation of state of asymptotically Anti-de Sitter Reissner-Nordstr\"om black holes. After briefly reviewing the equation of state for these black holes from the point of view of both ... |
0811.4155 | Catherine Meusburger | C. Meusburger | Cosmological measurements, time and observables in (2+1)-dimensional
gravity | 38 pages, 11 eps figures, typos corrected, references updated | Class.Quant.Grav.26:055006,2009 | 10.1088/0264-9381/26/5/055006 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the relation between measurements and the physical observables
for vacuum spacetimes with compact spatial surfaces in (2+1)-gravity with
vanishing cosmological constant. By considering an observer who emits lightrays
that return to him at a later time, we obtain explicit expressions for several
measura... | [
{
"created": "Tue, 25 Nov 2008 18:36:41 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Feb 2009 06:46:05 GMT",
"version": "v2"
}
] | 2009-02-16 | [
[
"Meusburger",
"C.",
""
]
] | We investigate the relation between measurements and the physical observables for vacuum spacetimes with compact spatial surfaces in (2+1)-gravity with vanishing cosmological constant. By considering an observer who emits lightrays that return to him at a later time, we obtain explicit expressions for several measurabl... |
1512.05284 | Remo Garattini | Remo Garattini | The Distorted Wheeler-DeWitt Equation | 6 pages. Contribution to the proceedings of "The Fourtheenth Marcel
Grossmann Meeting on General Relativity", University of Rome "La Sapienza",
Rome, July 12-18, 2015, based on a talk delivered at the EU1 parallel session | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Wheeler-DeWitt Equation represents a tool to study Quantum Gravity and
Quantum Cosmology. Its solution in a very general context is, of course,
impossible. To this purpose we consider some distortions of General Relativity
like Gravity's Rainbow, Varying Speed of Light Cosmology, Generalized
Uncertainty Principle... | [
{
"created": "Tue, 15 Dec 2015 12:35:45 GMT",
"version": "v1"
}
] | 2015-12-21 | [
[
"Garattini",
"Remo",
""
]
] | The Wheeler-DeWitt Equation represents a tool to study Quantum Gravity and Quantum Cosmology. Its solution in a very general context is, of course, impossible. To this purpose we consider some distortions of General Relativity like Gravity's Rainbow, Varying Speed of Light Cosmology, Generalized Uncertainty Principle d... |
1309.0777 | Hal Haggard | Goffredo Chirco, Hal M. Haggard and Carlo Rovelli | Coupling and thermal equilibrium in general-covariant systems | 8 pages, 3 figures | Phys. Rev. D 88, 084027 (2013) | 10.1103/PhysRevD.88.084027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A fully general-covariant formulation of statistical mechanics is still
lacking. We take a step toward this theory by studying the meaning of
statistical equilibrium for coupled, parametrized systems. We discuss how to
couple parametrized systems. We express the thermalization hypothesis in a
general-covariant contex... | [
{
"created": "Tue, 3 Sep 2013 18:54:19 GMT",
"version": "v1"
}
] | 2013-10-30 | [
[
"Chirco",
"Goffredo",
""
],
[
"Haggard",
"Hal M.",
""
],
[
"Rovelli",
"Carlo",
""
]
] | A fully general-covariant formulation of statistical mechanics is still lacking. We take a step toward this theory by studying the meaning of statistical equilibrium for coupled, parametrized systems. We discuss how to couple parametrized systems. We express the thermalization hypothesis in a general-covariant context.... |
2212.00203 | Xiangdong Zhang | Xiangdong Zhang and Yongge Ma | Realization of Dirac quantization in loop quantum gravity | 6 pages | Phys. Lett. B 847 (2023) 138297 | 10.1016/j.physletb.2023.138297 | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The system of gravity coupled to the non-rotational dust field is studied at
both classical and quantum levels. The scalar constraint of the system can be
written in the form of a true physical Hamiltonian with respect to the dust
time. In the framework of loop quantum gravity, the scalar constraint is
promoted to a ... | [
{
"created": "Thu, 1 Dec 2022 01:16:47 GMT",
"version": "v1"
}
] | 2023-11-15 | [
[
"Zhang",
"Xiangdong",
""
],
[
"Ma",
"Yongge",
""
]
] | The system of gravity coupled to the non-rotational dust field is studied at both classical and quantum levels. The scalar constraint of the system can be written in the form of a true physical Hamiltonian with respect to the dust time. In the framework of loop quantum gravity, the scalar constraint is promoted to a we... |
2209.03390 | Antoni Ramos-Buades | Antoni Ramos-Buades, Maarten van de Meent, Harald P. Pfeiffer, Hannes
R. R\"uter, Mark A. Scheel, Michael Boyle, Lawrence E. Kidder | Eccentric binary black holes: Comparing numerical relativity and small
mass-ratio perturbation theory | null | null | 10.1103/PhysRevD.106.124040 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modelling of unequal mass binary black hole systems is of high importance
to detect and estimate parameters from these systems. Numerical relativity (NR)
is well suited to study systems with comparable component masses, $m_1\sim
m_2$, whereas small mass ratio (SMR) perturbation theory applies to binaries
where $q... | [
{
"created": "Wed, 7 Sep 2022 18:01:23 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Ramos-Buades",
"Antoni",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Rüter",
"Hannes R.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Kidder",
"Lawrence E... | The modelling of unequal mass binary black hole systems is of high importance to detect and estimate parameters from these systems. Numerical relativity (NR) is well suited to study systems with comparable component masses, $m_1\sim m_2$, whereas small mass ratio (SMR) perturbation theory applies to binaries where $q=m... |
1908.05680 | Abhik Kumar Sanyal Dr. | Abhik Kumar Sanyal and Chandramouli Sarkar | The role of cosmological constant in f(R, G) gravity | 12 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein-Hilbert action is supplemented by Gauss-Bonnet squared term, its
phase-space structure is constructed and canonical quantization is performed.
Resolution of a contradiction that emerges in the process, requires the
presence of other fields at least in the form of vacuum energy-density,
commonly known as the ... | [
{
"created": "Thu, 15 Aug 2019 15:11:23 GMT",
"version": "v1"
}
] | 2019-08-19 | [
[
"Sanyal",
"Abhik Kumar",
""
],
[
"Sarkar",
"Chandramouli",
""
]
] | Einstein-Hilbert action is supplemented by Gauss-Bonnet squared term, its phase-space structure is constructed and canonical quantization is performed. Resolution of a contradiction that emerges in the process, requires the presence of other fields at least in the form of vacuum energy-density, commonly known as the co... |
2010.02018 | Andrea Antonelli | Andrea Antonelli, Chris Kavanagh, Mohammed Khalil, Jan Steinhoff,
Justin Vines | Gravitational spin-orbit and aligned spin$_1$-spin$_2$ couplings through
third-subleading post-Newtonian orders | 29 pages, 2 figures, supplemental material; v2: added references | Phys. Rev. D 102, 124024 (2020) | 10.1103/PhysRevD.102.124024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of scattering encounters continues to provide new insights into the
general relativistic two-body problem. The local-in-time conservative dynamics
of an aligned-spin binary, for both unbound and bound orbits, is fully encoded
in the gauge-invariant scattering-angle function, which is most naturally
expresse... | [
{
"created": "Fri, 2 Oct 2020 14:05:37 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Oct 2020 09:41:16 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Antonelli",
"Andrea",
""
],
[
"Kavanagh",
"Chris",
""
],
[
"Khalil",
"Mohammed",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Vines",
"Justin",
""
]
] | The study of scattering encounters continues to provide new insights into the general relativistic two-body problem. The local-in-time conservative dynamics of an aligned-spin binary, for both unbound and bound orbits, is fully encoded in the gauge-invariant scattering-angle function, which is most naturally expressed ... |
2304.06472 | Shouvik Sadhukhan Mr | Alokananda Kar and Shouvik Sadhukhan | Binary Interaction with Multiple Fluid Type Cosmology Under Modified
Gravity Frame | 8 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present chapter, we have established multiple fluid cosmological
models under interaction scenarios. the interaction model we have established
is a binary type of interaction scenario where three types of fluids are bound
with interaction. We have incorporated variable gravitational constant and
variable cosmo... | [
{
"created": "Tue, 4 Apr 2023 08:02:41 GMT",
"version": "v1"
}
] | 2023-04-14 | [
[
"Kar",
"Alokananda",
""
],
[
"Sadhukhan",
"Shouvik",
""
]
] | In the present chapter, we have established multiple fluid cosmological models under interaction scenarios. the interaction model we have established is a binary type of interaction scenario where three types of fluids are bound with interaction. We have incorporated variable gravitational constant and variable cosmolo... |
1711.09625 | Kimet Jusufi | Kimet Jusufi | Hawking Radiation in the Spacetime of White Holes | Ref. [50] added, version published in General Relativity and
Gravitation | Gen. Relativ. Gravit. 50, 84 (2018) | 10.1007/s10714-018-2406-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A white hole (WH) is a time-reversed black hole (BH) solution in General
relativity with a spacetime region to which cannot be entered from the outside.
Recently they have been proposed as a possible solution to the information loss
problem [Haggard and Rovelli, 2015]. In particular it has been argued that the
quanti... | [
{
"created": "Mon, 27 Nov 2017 11:23:59 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jun 2018 17:34:59 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Jun 2018 16:41:11 GMT",
"version": "v3"
}
] | 2018-06-22 | [
[
"Jusufi",
"Kimet",
""
]
] | A white hole (WH) is a time-reversed black hole (BH) solution in General relativity with a spacetime region to which cannot be entered from the outside. Recently they have been proposed as a possible solution to the information loss problem [Haggard and Rovelli, 2015]. In particular it has been argued that the quantiza... |
0709.3286 | Vladimir Strokov N. | V. Strokov, S. Repin | Perihelion precession and deflection of light in gravitational field of
wormholes | 8 pages, no figures, submitted to Grav. and Cosm | null | null | null | gr-qc astro-ph | null | Quite exotic relativistic objects known as wormholes are hypothetical
candidates for central machine of active galactic nuclei as well as black
holes. We find the magnitude of the perihelion precession and the deflection of
light in gravitational field of a wormhole and compare them with those for a
black hole. The i... | [
{
"created": "Thu, 20 Sep 2007 19:43:06 GMT",
"version": "v1"
}
] | 2007-09-24 | [
[
"Strokov",
"V.",
""
],
[
"Repin",
"S.",
""
]
] | Quite exotic relativistic objects known as wormholes are hypothetical candidates for central machine of active galactic nuclei as well as black holes. We find the magnitude of the perihelion precession and the deflection of light in gravitational field of a wormhole and compare them with those for a black hole. The imp... |
2405.12074 | Ahmad Al-Badawi | Ahmad Al-Badawi | Quazinormal modes and greybody factor of black hole surrounded by a
quintessence in the S-V-T modified gravity as well as shadow | null | Phys. Scr. 99 (2024) 065002 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this study is to investigate the quasinormal modes (QNMs),
greybody factors (GFs) and shadows in a plasma of a black hole (BH) surrounded
by an exotic fluid of quintessence type in a scalar-vector-tensor modified
gravity. The effects of a quintessence scalar field and the modified gravity
(MOG) field o... | [
{
"created": "Mon, 20 May 2024 14:42:28 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Al-Badawi",
"Ahmad",
""
]
] | The purpose of this study is to investigate the quasinormal modes (QNMs), greybody factors (GFs) and shadows in a plasma of a black hole (BH) surrounded by an exotic fluid of quintessence type in a scalar-vector-tensor modified gravity. The effects of a quintessence scalar field and the modified gravity (MOG) field on ... |
1812.01331 | Kimet Jusufi | Muhammad Rizwan, Mubasher Jamil, Kimet Jusufi | Distinguishing a Kerr-like black hole and a naked singularity in perfect
fluid dark matter via precession frequencies | 17 pages, 12 figures, 1 table. Version published in Physical Review D | Phys. Rev. D 99, 024050 (2019) | 10.1103/PhysRevD.99.024050 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a Kerr-like black hole and naked singularity in perfect fluid dark
matter (PFDM). The critical value of spin parameter $a_c$ is presented to
differentiate the black hole from naked singularity. It is seen that for any
fixed value of dark matter parameter $\alpha$ the rotating object is black hole
if $a\leq a... | [
{
"created": "Tue, 4 Dec 2018 11:01:20 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2019 15:26:53 GMT",
"version": "v2"
}
] | 2019-02-01 | [
[
"Rizwan",
"Muhammad",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Jusufi",
"Kimet",
""
]
] | We study a Kerr-like black hole and naked singularity in perfect fluid dark matter (PFDM). The critical value of spin parameter $a_c$ is presented to differentiate the black hole from naked singularity. It is seen that for any fixed value of dark matter parameter $\alpha$ the rotating object is black hole if $a\leq a_c... |
1403.3858 | Filipe Mena | Irene Brito, M. F. A. da Silva, Filipe C. Mena and N. O. Santos | Geodesics dynamics in the Linet-Tian spacetime with Lambda<0 | 25 pages, 13 figures | General Relativity and Gravitation, 46 (2014) 1681 (23 pages) | 10.1007/s10714-014-1681-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the geodesics' kinematics and dynamics in the Linet-Tian
metric with Lambda<0 and compare with the results for the Levi-Civita metric,
when Lambda=0. This is used to derive new stability results about the
geodesics' dynamics in static vacuum cylindrically symmetric spacetimes with
respect to the introd... | [
{
"created": "Sat, 15 Mar 2014 23:11:33 GMT",
"version": "v1"
}
] | 2014-03-18 | [
[
"Brito",
"Irene",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Mena",
"Filipe C.",
""
],
[
"Santos",
"N. O.",
""
]
] | We investigate the geodesics' kinematics and dynamics in the Linet-Tian metric with Lambda<0 and compare with the results for the Levi-Civita metric, when Lambda=0. This is used to derive new stability results about the geodesics' dynamics in static vacuum cylindrically symmetric spacetimes with respect to the introduc... |
gr-qc/0509099 | Cherubini Christian | Christian Cherubini, Simonetta Filippi | Using FEMLAB for Gravitational problems: numerical simulations for all | 6 pages, 18 eps figures, RevTeX style | J.Korean Phys.Soc. 49 (2006) S829-S834 | null | null | gr-qc | null | We discuss the possibility to solve Modern Numerical Relativity problems
using finite element methods (FEM). Adopting a "user friendly" software for
handling totally general systems of nonlinear partial differential equations,
FEMLAB, we model and numerically solve in a short time a Gowdy vacuum
spacetime, representi... | [
{
"created": "Mon, 26 Sep 2005 09:55:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cherubini",
"Christian",
""
],
[
"Filippi",
"Simonetta",
""
]
] | We discuss the possibility to solve Modern Numerical Relativity problems using finite element methods (FEM). Adopting a "user friendly" software for handling totally general systems of nonlinear partial differential equations, FEMLAB, we model and numerically solve in a short time a Gowdy vacuum spacetime, representing... |
2205.08261 | Yorgo Senikoglu | Tekin Dereli, Ozay Gurtug, Mustafa Halilsoy, Yorgo Senikoglu | Neutrino Fields in a Sandwich Gravitational Wave Background | Accepted Version to appear in Class.Quant.Grav | null | 10.1088/1361-6382/ac9bc6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Sandwich gravitational waves are given globally in terms of step functions at
the boundaries. Linearized Einstein-Weyl equations are solved exactly in this
background in Rosen coordinates. Depending on the geometry and composition of
the sandwich wave, the neutrino's energy-momentum redistributes itself. At the
test ... | [
{
"created": "Tue, 17 May 2022 12:02:14 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2022 13:40:29 GMT",
"version": "v2"
}
] | 2022-11-23 | [
[
"Dereli",
"Tekin",
""
],
[
"Gurtug",
"Ozay",
""
],
[
"Halilsoy",
"Mustafa",
""
],
[
"Senikoglu",
"Yorgo",
""
]
] | Sandwich gravitational waves are given globally in terms of step functions at the boundaries. Linearized Einstein-Weyl equations are solved exactly in this background in Rosen coordinates. Depending on the geometry and composition of the sandwich wave, the neutrino's energy-momentum redistributes itself. At the test fi... |
1905.00600 | Gang Wang | Gang Wang, Dongfeng Gao, Wei-Tou Ni, Jin Wang and Mingsheng Zhan | Orbit Design for Space Atom-Interferometer AIGSO | 14 pages, 8 figures, accepted by IJMPD | International Journal of Physics D Vol. 29 (2020) 1940004 | 10.1142/S0218271819400042 | null | gr-qc physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Atom Interferometric Gravitational-wave (GW) Space Observatory (AIGSO) is a
mission concept mainly aimed at the middle-frequency (0.1 Hz - 10 Hz) GW
detection. AIGSO proposes to have three spacecraft in linear formation with
extension of 10 km. The three spacecraft need to maintain 5 km + 5 km constant
arm-length for... | [
{
"created": "Thu, 2 May 2019 07:44:30 GMT",
"version": "v1"
}
] | 2020-07-14 | [
[
"Wang",
"Gang",
""
],
[
"Gao",
"Dongfeng",
""
],
[
"Ni",
"Wei-Tou",
""
],
[
"Wang",
"Jin",
""
],
[
"Zhan",
"Mingsheng",
""
]
] | Atom Interferometric Gravitational-wave (GW) Space Observatory (AIGSO) is a mission concept mainly aimed at the middle-frequency (0.1 Hz - 10 Hz) GW detection. AIGSO proposes to have three spacecraft in linear formation with extension of 10 km. The three spacecraft need to maintain 5 km + 5 km constant arm-length forma... |
1502.06458 | Yafet Sanchez Sanchez | Yafet Sanchez Sanchez | Regularity of curve integrable spacetimes | 28 pages, 1 figure | General Relativity and Gravitation 47, 80 (2015) | 10.1007/s10714-015-1922-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of defining a gravitational singularity as an obstruction to the
dynamical evolution of a test field (described by a PDE) rather than the
dynamical evolution of a particle (described by a geodesics) is explored. In
particular, the concept of field regularity is introduced which serves to
describe the well-po... | [
{
"created": "Mon, 23 Feb 2015 15:11:41 GMT",
"version": "v1"
},
{
"created": "Fri, 1 May 2015 11:15:57 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Jun 2015 09:25:38 GMT",
"version": "v3"
}
] | 2015-06-23 | [
[
"Sanchez",
"Yafet Sanchez",
""
]
] | The idea of defining a gravitational singularity as an obstruction to the dynamical evolution of a test field (described by a PDE) rather than the dynamical evolution of a particle (described by a geodesics) is explored. In particular, the concept of field regularity is introduced which serves to describe the well-pose... |
2001.07945 | Diego S\'aez-Chill\'on G\'omez | Sergei D. Odintsov, Diego Saez-Chillon Gomez and German S. Sharov | Testing the equation of state for viscous dark energy | 13 pages, 3 figures. To be published in PRD | Phys. Rev. D 101, 044010 (2020) | 10.1103/PhysRevD.101.044010 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some cosmological scenarios with bulk viscosity for the dark energy fluid are
considered. Based on some considerations related to hydrodynamics, two
different equations of state for dark energy are assumed, leading to power-law
and logarithmic effective corrections to the pressure. The models are tested
with the late... | [
{
"created": "Wed, 22 Jan 2020 10:28:08 GMT",
"version": "v1"
}
] | 2020-02-07 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"Gomez",
"Diego Saez-Chillon",
""
],
[
"Sharov",
"German S.",
""
]
] | Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on some considerations related to hydrodynamics, two different equations of state for dark energy are assumed, leading to power-law and logarithmic effective corrections to the pressure. The models are tested with the latest... |
1508.02001 | Fabio Briscese | F. Briscese, E. R. Bezerra de Mello, A. Yu. Petrov, V. B. Bezerra | One-loop effective potential in nonlocal scalar field models | null | Phys. Rev. D 92, 104026 (2015) | 10.1103/PhysRevD.92.104026 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we apply the usual perturbative methodology to evaluate the
one-loop effective potential in a nonlocal scalar field theory. We find that
the effect induced by the nonlocaliity of the theory is always very small and
we discuss the consequences of this result. In particular we argue that,
looking at one-l... | [
{
"created": "Sun, 9 Aug 2015 09:11:31 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Nov 2015 21:58:12 GMT",
"version": "v2"
}
] | 2015-11-18 | [
[
"Briscese",
"F.",
""
],
[
"de Mello",
"E. R. Bezerra",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Bezerra",
"V. B.",
""
]
] | In this paper we apply the usual perturbative methodology to evaluate the one-loop effective potential in a nonlocal scalar field theory. We find that the effect induced by the nonlocaliity of the theory is always very small and we discuss the consequences of this result. In particular we argue that, looking at one-loo... |
1704.02990 | Anzhong Wang | Kai Lin, Shinji Mukohyama, Anzhong Wang, and Tao Zhu | No static black hole hairs in gravitational theories of gravity with
broken Lorentz invariance | revtex4, 4 figures and no table. A version to appear in Phys. Rev. D | Phys. Rev. D 95, 124053 (2017) | 10.1103/PhysRevD.95.124053 | YITP-17-36, IPMU17-0056 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we revisit the issue of static hairs of black holes in
gravitational theories with broken Lorentz invariance in the case that the
speed $c_{\phi}$ of the khronon field becomes infinitely large, $c_{\phi} =
\infty$, for which the sound horizon of the khronon field coincides with the
universal horizon, a... | [
{
"created": "Mon, 10 Apr 2017 18:00:18 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jun 2017 01:30:58 GMT",
"version": "v2"
}
] | 2017-07-05 | [
[
"Lin",
"Kai",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Zhu",
"Tao",
""
]
] | In this paper, we revisit the issue of static hairs of black holes in gravitational theories with broken Lorentz invariance in the case that the speed $c_{\phi}$ of the khronon field becomes infinitely large, $c_{\phi} = \infty$, for which the sound horizon of the khronon field coincides with the universal horizon, and... |
2206.04085 | Christopher Munna | Christopher Munna, Charles R. Evans | Post-Newtonian expansion of the spin-precession invariant for
eccentric-orbit non-spinning extreme-mass-ratio inspirals to 9PN and $e^{16}$ | 23 pages, 2 figures | null | 10.1103/PhysRevD.106.044058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the eccentricity dependence of the high-order post-Newtonian
(PN) expansion of the spin-precession invariant $\psi$ for eccentric-orbit
extreme-mass-ratio inspirals with a Schwarzschild primary. The series is
calculated in first-order black hole perturbation theory through direct
analytic expansion of so... | [
{
"created": "Wed, 8 Jun 2022 18:00:05 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Munna",
"Christopher",
""
],
[
"Evans",
"Charles R.",
""
]
] | We calculate the eccentricity dependence of the high-order post-Newtonian (PN) expansion of the spin-precession invariant $\psi$ for eccentric-orbit extreme-mass-ratio inspirals with a Schwarzschild primary. The series is calculated in first-order black hole perturbation theory through direct analytic expansion of solu... |
1707.00984 | Alexandros Karam | Alexandros Karam, Thomas Pappas, Kyriakos Tamvakis | Frame-dependence of higher-order inflationary observables in
scalar-tensor theories | Title changed per journal request, typos fixed, a few comments and
references added, to appear in PRD | Phys. Rev. D 96, 064036 (2017) | 10.1103/PhysRevD.96.064036 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of scalar-tensor theories of gravity we compute the
third-order corrected spectral indices in the slow-roll approximation. The
calculation is carried out by employing the Green's function method for scalar
and tensor perturbations in both the Einstein and Jordan frames. Then, using
the interrelations b... | [
{
"created": "Sun, 2 Jul 2017 17:07:28 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2017 18:40:32 GMT",
"version": "v2"
}
] | 2017-09-27 | [
[
"Karam",
"Alexandros",
""
],
[
"Pappas",
"Thomas",
""
],
[
"Tamvakis",
"Kyriakos",
""
]
] | In the context of scalar-tensor theories of gravity we compute the third-order corrected spectral indices in the slow-roll approximation. The calculation is carried out by employing the Green's function method for scalar and tensor perturbations in both the Einstein and Jordan frames. Then, using the interrelations bet... |
1809.10729 | Merced Montesinos | Merced Montesinos, Diego Gonzalez, Mariano Celada | The gauge symmetries of first-order general relativity with matter
fields | It matches published version | Class.Quant.Grav.35:205005,2018 | 10.1088/1361-6382/aae10d | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In $n$-dimensional spacetimes ($n>3$), there exists an internal gauge
symmetry of the Palatini action with a cosmological constant that is the
natural generalization of the so-called "local translations" of
three-dimensional general relativity. We report the extension of this symmetry
to include the minimal coupling ... | [
{
"created": "Thu, 27 Sep 2018 19:07:59 GMT",
"version": "v1"
}
] | 2018-11-21 | [
[
"Montesinos",
"Merced",
""
],
[
"Gonzalez",
"Diego",
""
],
[
"Celada",
"Mariano",
""
]
] | In $n$-dimensional spacetimes ($n>3$), there exists an internal gauge symmetry of the Palatini action with a cosmological constant that is the natural generalization of the so-called "local translations" of three-dimensional general relativity. We report the extension of this symmetry to include the minimal coupling of... |
2402.08307 | Andr\'es M\'inguez-S\'anchez | Guillermo A. Mena Marug\'an and Andr\'es M\'inguez-S\'anchez | Axial perturbations in Kantowski-Sachs spacetimes and hybrid quantum
cosmology | 18 pages | Phys. Rev. D 109, 106009 (2024) | 10.1103/PhysRevD.109.106009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, there has been a growing interest in investigating homogeneous but
anisotropic spacetimes owing to their relation with nonrotating, uncharged
black hole interiors. We present a description of axial perturbations for a
massless scalar field minimally coupled to this geometry. We truncate the
action at the qu... | [
{
"created": "Tue, 13 Feb 2024 09:09:26 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2024 09:42:49 GMT",
"version": "v2"
}
] | 2024-06-24 | [
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Mínguez-Sánchez",
"Andrés",
""
]
] | Recently, there has been a growing interest in investigating homogeneous but anisotropic spacetimes owing to their relation with nonrotating, uncharged black hole interiors. We present a description of axial perturbations for a massless scalar field minimally coupled to this geometry. We truncate the action at the quad... |
1312.3622 | Shuang-Yong Zhou | Thomas P. Sotiriou and Shuang-Yong Zhou | Black hole hair in generalized scalar-tensor gravity | 4+1 pages, PRL version | Phys. Rev. Lett. 112, 251102 (2014) | 10.1103/PhysRevLett.112.251102 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The most general action for a scalar field coupled to gravity that leads to
second order field equations for both the metric and the scalar --- Horndeski's
theory --- is considered, with the extra assumption that the scalar satisfies
shift symmetry. We show that in such theories the scalar field is forced to
have a n... | [
{
"created": "Thu, 12 Dec 2013 20:51:42 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Aug 2014 23:05:09 GMT",
"version": "v2"
}
] | 2014-08-13 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Zhou",
"Shuang-Yong",
""
]
] | The most general action for a scalar field coupled to gravity that leads to second order field equations for both the metric and the scalar --- Horndeski's theory --- is considered, with the extra assumption that the scalar satisfies shift symmetry. We show that in such theories the scalar field is forced to have a non... |
gr-qc/0212127 | Yuri Goncharov | A. A. Bytsenko (Departamento de Fisica, Universidade Estadual de
Londrina, Londrina-Parana, Brazil) and Yu. P. Goncharov (Sankt-Petersburg
State Polytechnical Unversity) | Dirac Monopoles and Hawking radiation in Kottler spacetime | 11 pages, LaTeX with using the ijmpa1.sty file from the package of
World Scientific Publishing Co | Int.J.Mod.Phys. A17 (2002) 4947-4957 | 10.1142/S0217751X02012168 | null | gr-qc | null | The natural extension of Schwarzschild metric to the case of nonzero
cosmological constant $\Lambda$ known as the Kottler metric is considered and
it is discussed under what circumstances the given metric could describe the
Schwarzschild black hole immersed in a medium with nonzero energy density.
Under the latter si... | [
{
"created": "Tue, 31 Dec 2002 11:05:53 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bytsenko",
"A. A.",
"",
"Departamento de Fisica, Universidade Estadual de\n Londrina, Londrina-Parana, Brazil"
],
[
"Goncharov",
"Yu. P.",
"",
"Sankt-Petersburg\n State Polytechnical Unversity"
]
] | The natural extension of Schwarzschild metric to the case of nonzero cosmological constant $\Lambda$ known as the Kottler metric is considered and it is discussed under what circumstances the given metric could describe the Schwarzschild black hole immersed in a medium with nonzero energy density. Under the latter situ... |
1105.4709 | Mikhail Gorbatenko | M.V. Gorbatenko, V.P. Neznamov | Atoms and Forces of Interaction Between Elementary Particles in the
Expanding Universe | 12 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The earlier developed algorithm for constructing a self-conjugate Hamiltonian
in the \eta-representation for Dirac particles interacting with a general
gravitational field is extended to the case of electromagnetic fields. This
Hamiltonian is applied to the case when the gravitational field describes the
spatially fl... | [
{
"created": "Tue, 24 May 2011 08:36:18 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2011 07:22:29 GMT",
"version": "v2"
}
] | 2011-11-07 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Neznamov",
"V. P.",
""
]
] | The earlier developed algorithm for constructing a self-conjugate Hamiltonian in the \eta-representation for Dirac particles interacting with a general gravitational field is extended to the case of electromagnetic fields. This Hamiltonian is applied to the case when the gravitational field describes the spatially flat... |
1209.4374 | Abhay Ashtekar | Abhay Ashtekar and Miguel Campiglia | On the Uniqueness of Kinematics of Loop Quantum Cosmology | 9 pages | Class. Quantum Grav. 29, 242001 (2012) | 10.1088/0264-9381/29/24/242001 | GC-12/09/03 | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holonomy-flux algebra $\A$ of loop quantum gravity is known to admit a
natural representation that is uniquely singled out by the requirement of
covariance under spatial diffeomorphisms. In the cosmological context, the
requirement of spatial homogeneity naturally reduces $\A$ to a much smaller
algebra, $\A_{\rm ... | [
{
"created": "Wed, 19 Sep 2012 21:16:38 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Campiglia",
"Miguel",
""
]
] | The holonomy-flux algebra $\A$ of loop quantum gravity is known to admit a natural representation that is uniquely singled out by the requirement of covariance under spatial diffeomorphisms. In the cosmological context, the requirement of spatial homogeneity naturally reduces $\A$ to a much smaller algebra, $\A_{\rm Re... |
gr-qc/9807064 | K. Srinivasan | K. Srinivasan and T. Padmanabhan | Facets of Tunneling: Particle production in external fields | 22 pages, Revtex file | null | null | IUCAA Preprint No: 29/98 | gr-qc hep-th | null | This paper presents a critical review of particle production in an uniform
electric field and Schwarzchild-like spacetimes. Both problems can be reduced
to solving an effective one-dimensional Schrodinger equation with a potential
barrier. In the electric field case, the potential is that of an inverted
oscillator -x... | [
{
"created": "Thu, 23 Jul 1998 06:40:49 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Srinivasan",
"K.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | This paper presents a critical review of particle production in an uniform electric field and Schwarzchild-like spacetimes. Both problems can be reduced to solving an effective one-dimensional Schrodinger equation with a potential barrier. In the electric field case, the potential is that of an inverted oscillator -x^2... |
1612.06504 | Abhik Kumar Sanyal Dr. | Abhik Kumar Sanyal | Enlightening the dark universe | 21 pages, 13 figures, The lecture given on "One day seminar on
Einstein and his contributions in Physics and Cosmology to celebrate 100
years of General Theory of Relativity" organized by " Calcutta Institute of
Theoretical Physics in collaboration with Department of Mathematics, St.
Xavier's College, Kolkata" ... | Indian Journal of Theoretical Physics, 62, 211-262 (2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lot of avenues, the black hole, the wormhole, the dark matter, the dark
energy etc. have been opened since the advent of General Theory of Relativity
in 1915. Cosmology, the physics of creation and evolution of the universe,
which was once thought to be beyond human perseverance, has now become a rich
science of high... | [
{
"created": "Tue, 20 Dec 2016 04:53:49 GMT",
"version": "v1"
}
] | 2017-07-18 | [
[
"Sanyal",
"Abhik Kumar",
""
]
] | Lot of avenues, the black hole, the wormhole, the dark matter, the dark energy etc. have been opened since the advent of General Theory of Relativity in 1915. Cosmology, the physics of creation and evolution of the universe, which was once thought to be beyond human perseverance, has now become a rich science of highes... |
1401.0368 | Yuri Pavlov | A. A. Grib, Yu. V. Pavlov | High energy particles with negative and positive energies in the
vicinity of black holes | 12 pages, no figures. arXiv admin note: substantial text overlap with
arXiv:1301.0698, arXiv:1304.7360 | AIP Conf. Proc. 1606, (2014) 11-18 | 10.1063/1.4891112 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the energy in the centre of mass frame of two colliding
particles in free fall at any point of the ergosphere of the rotating black
hole can grow without limit for fixed energy values of particles on infinity.
The effect takes place for large negative values of the angular momentum of one
of the part... | [
{
"created": "Thu, 2 Jan 2014 05:53:38 GMT",
"version": "v1"
}
] | 2014-09-16 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | It is shown that the energy in the centre of mass frame of two colliding particles in free fall at any point of the ergosphere of the rotating black hole can grow without limit for fixed energy values of particles on infinity. The effect takes place for large negative values of the angular momentum of one of the partic... |
2207.10085 | Surajit Mandal | Surajit Mandal, Sudhaker Upadhyay, Yerlan Myrzakulov, Gulmira
Yergaliyeva | Shadow of the $5D$ Reissner-Nordstr\"om AdS Black Hole | 23 pages, 19 captioned figures | International Journal of Modern Physics A 38 (2023) 2350047 | 10.1142/S0217751X23500471 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We discuss the shadow cast by the charged Reissner-Nordstr\"om (RN) AdS black
hole. With the help of Killing equation and Hamilton-Jacobi equation, we
calculate the geodesic equations for null particle. With the help of geodesics
of null particle, we then determine the celestial coordinates ($\alpha$,
$\beta$) and th... | [
{
"created": "Wed, 20 Jul 2022 15:41:05 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Aug 2022 13:24:48 GMT",
"version": "v2"
}
] | 2023-07-06 | [
[
"Mandal",
"Surajit",
""
],
[
"Upadhyay",
"Sudhaker",
""
],
[
"Myrzakulov",
"Yerlan",
""
],
[
"Yergaliyeva",
"Gulmira",
""
]
] | We discuss the shadow cast by the charged Reissner-Nordstr\"om (RN) AdS black hole. With the help of Killing equation and Hamilton-Jacobi equation, we calculate the geodesic equations for null particle. With the help of geodesics of null particle, we then determine the celestial coordinates ($\alpha$, $\beta$) and the ... |
2011.12533 | Suparna Roychowdhury Dr. | Shounak De, Suparna Roychowdhury, Roopkatha Banerjee | Beyond-Newtonian dynamics of a planar circular restricted three-body
problem with Kerr-like primaries | 19 pages, 11 figures; Accepted for publication in MNRAS | null | 10.1093/mnras/staa3733 | null | gr-qc astro-ph.HE nlin.CD | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The dynamics of the planar circular restricted three-body problem with
Kerr-like primaries in the context of a beyond-Newtonian approximation is
studied. The beyond-Newtonian potential is developed by using the
Fodor-Hoenselaers-Perj\'es procedure. An expansion in the Kerr potential is
performed and terms up-to the f... | [
{
"created": "Wed, 25 Nov 2020 06:09:26 GMT",
"version": "v1"
}
] | 2020-12-09 | [
[
"De",
"Shounak",
""
],
[
"Roychowdhury",
"Suparna",
""
],
[
"Banerjee",
"Roopkatha",
""
]
] | The dynamics of the planar circular restricted three-body problem with Kerr-like primaries in the context of a beyond-Newtonian approximation is studied. The beyond-Newtonian potential is developed by using the Fodor-Hoenselaers-Perj\'es procedure. An expansion in the Kerr potential is performed and terms up-to the fir... |
0911.2971 | Shahram Jalalzadeh | S. M. M. Rasouli, A. F. Bahrehbakhsh, S. Jalalzadeh and M. Farhoudi | Quantum mechanics and geodesic deviation in the brane world | 5 pages, no figures | Europhys.Lett.87:40006,2009 | 10.1209/0295-5075/87/40006 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/3.0/ | We investigate the induced geodesic deviation equations in the brane world
models, in which all the matter forces except gravity are confined on the
3-brane. Also, the Newtonian limit of induced geodesic deviation equation is
studied. We show that in the first Randall-Sundrum model the Bohr-Sommerfeld
quantization ru... | [
{
"created": "Mon, 16 Nov 2009 07:49:53 GMT",
"version": "v1"
}
] | 2016-09-13 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Bahrehbakhsh",
"A. F.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Farhoudi",
"M.",
""
]
] | We investigate the induced geodesic deviation equations in the brane world models, in which all the matter forces except gravity are confined on the 3-brane. Also, the Newtonian limit of induced geodesic deviation equation is studied. We show that in the first Randall-Sundrum model the Bohr-Sommerfeld quantization rule... |
gr-qc/0409089 | T. Padmanabhan | T.Padmanabhan | From Gravitons to Gravity: Myths and Reality | revtex; 19 pages; no figures | Int.J.Mod.Phys.D17:367-398,2008 | 10.1142/S0218271808012085 | null | gr-qc astro-ph hep-th | null | There is a general belief, reinforced by statements in standard textbooks,
that: (i) one can obtain the full non-linear Einstein's theory of gravity by
coupling a massless, spin-2 field $h_{ab}$ self-consistently to the total
energy momentum tensor, including its own; (ii) this procedure is unique and
leads to Einste... | [
{
"created": "Thu, 23 Sep 2004 05:28:42 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Padmanabhan",
"T.",
""
]
] | There is a general belief, reinforced by statements in standard textbooks, that: (i) one can obtain the full non-linear Einstein's theory of gravity by coupling a massless, spin-2 field $h_{ab}$ self-consistently to the total energy momentum tensor, including its own; (ii) this procedure is unique and leads to Einstein... |
gr-qc/0408042 | Allan Joseph Michael Medved | Joanne Kettner, Gabor Kunstatter and A.J.M. Medved | Quasinormal modes for single horizon black holes in generic 2-d dilaton
gravity | 20 pages, in Revtex; (v2) some new references and minor changes to
the text; (v3) some clarity added to Introduction and new reference | Class.Quant.Grav. 21 (2004) 5317-5332 | 10.1088/0264-9381/21/23/002 | null | gr-qc hep-th | null | There has been some recent speculation that a connection may exist between
the quasinormal-mode spectra of highly damped black holes and the fundamental
theory of quantum gravity. This notion follows from a conjecture by Hod that
the real part of the highly damped mode frequencies can be used to calibrate
the semi-cl... | [
{
"created": "Mon, 16 Aug 2004 06:30:06 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Sep 2004 00:59:33 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Sep 2004 05:37:49 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Kettner",
"Joanne",
""
],
[
"Kunstatter",
"Gabor",
""
],
[
"Medved",
"A. J. M.",
""
]
] | There has been some recent speculation that a connection may exist between the quasinormal-mode spectra of highly damped black holes and the fundamental theory of quantum gravity. This notion follows from a conjecture by Hod that the real part of the highly damped mode frequencies can be used to calibrate the semi-clas... |
1112.4114 | Anil Yadav dr | Anil Kumar Yadav, Vineet Kumar Yadav and Lallan Yadav | Cylindrically Symmetric Inhomogeneous Universes with a Cloud of Strings | 9 pages | Int. J. Theor. Phys. 48: 568-578, 2009 | 10.1007/s10773-008-9832-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cylindrically symmetric inhomogeneous string cosmological models are
investigated in presence of string fluid as a source of matter. To get the
three types of exact solutions of Einstein's field equations we assume $A =
f(x)k(t)$, $B = g(x)\ell(t)$ and $C = h(x)\ell(t)$. Some physical and geometric
aspects of the mod... | [
{
"created": "Sun, 18 Dec 2011 04:42:13 GMT",
"version": "v1"
}
] | 2011-12-20 | [
[
"Yadav",
"Anil Kumar",
""
],
[
"Yadav",
"Vineet Kumar",
""
],
[
"Yadav",
"Lallan",
""
]
] | Cylindrically symmetric inhomogeneous string cosmological models are investigated in presence of string fluid as a source of matter. To get the three types of exact solutions of Einstein's field equations we assume $A = f(x)k(t)$, $B = g(x)\ell(t)$ and $C = h(x)\ell(t)$. Some physical and geometric aspects of the model... |
gr-qc/9506087 | null | A. Carlini, V.P. Frolov, M.B. Mensky, I.D. Novikov and H.H. Soleng | Time machines: the Principle of Self-Consistency as a consequence of the
Principle of Minimal Action | 26 pages, plain latex; modified version includes extra constraint for
collinear collision case and other minor misprints corrections | Int.J.Mod.Phys. D4 (1995) 557-580; Erratum-ibid. D5 (1996) 99 | 10.1142/S0218271896000588 | NORDITA-95/49 | gr-qc | null | We consider the action principle to derive the classical, non-relativistic
motion of a self-interacting particle in a 4-D Lorentzian spacetime containing
a wormhole and which allows the existence of closed time-like curves. For the
case of a `hard-sphere' self-interaction potential we show that the only
possible traj... | [
{
"created": "Sat, 1 Jul 1995 18:54:38 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 1996 10:27:04 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Carlini",
"A.",
""
],
[
"Frolov",
"V. P.",
""
],
[
"Mensky",
"M. B.",
""
],
[
"Novikov",
"I. D.",
""
],
[
"Soleng",
"H. H.",
""
]
] | We consider the action principle to derive the classical, non-relativistic motion of a self-interacting particle in a 4-D Lorentzian spacetime containing a wormhole and which allows the existence of closed time-like curves. For the case of a `hard-sphere' self-interaction potential we show that the only possible trajec... |
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