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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1805.10640 | Liwei Ji | Zhoujian Cao, and Pei Fu, and Li-Wei Ji, and Yinhua Xia | Binary black hole simulation with an adaptive finite element method II:
Application of local discontinuous Galerkin method to Einstein equations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Finite difference method and pseudo-spectral method have been widely used in
the numerical relativity to solve the Einstein equations. As the third major
category method to solve partial differential equations, finite element method
is much less used in numerical relativity. In this paper we design a finite
element a... | [
{
"created": "Sun, 27 May 2018 15:42:32 GMT",
"version": "v1"
}
] | 2018-05-29 | [
[
"Cao",
"Zhoujian",
""
],
[
"Fu",
"Pei",
""
],
[
"Ji",
"Li-Wei",
""
],
[
"Xia",
"Yinhua",
""
]
] | Finite difference method and pseudo-spectral method have been widely used in the numerical relativity to solve the Einstein equations. As the third major category method to solve partial differential equations, finite element method is much less used in numerical relativity. In this paper we design a finite element alg... |
1105.4057 | Harvey S. Reall | Harvey S. Reall | Algebraically special solutions in higher dimensions | Chapter of a book on higher-dimensional black holes to be published
by Cambridge University Press (editor: G. Horowitz). v2: section 1.4.3
corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An introductory review of algebraic classification of the Weyl tensor and
algebraically special solutions in higher dimensions.
| [
{
"created": "Fri, 20 May 2011 11:02:38 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jun 2011 07:36:28 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Mar 2012 16:08:18 GMT",
"version": "v3"
}
] | 2012-03-13 | [
[
"Reall",
"Harvey S.",
""
]
] | An introductory review of algebraic classification of the Weyl tensor and algebraically special solutions in higher dimensions. |
1706.00026 | Zoe Wyatt | Zoe Wyatt | The Weak Null Condition and Kaluza-Klein Spacetimes | 28 pages, 1 figure | J. Hyperbolic Differ. Equ. Vol 15, No. 02, pp. 219-258 (2018) | 10.1142/S0219891618500091 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove the non-linear stability of a system of non-linear
wave equations satisfying the weak null condition. In particular, this includes
the case of the non-linear stability of Minkowski spacetime times a $d$-torus
subject to perturbations depending only on the non-compact coordinates. Our
argument v... | [
{
"created": "Wed, 31 May 2017 18:01:04 GMT",
"version": "v1"
}
] | 2019-01-30 | [
[
"Wyatt",
"Zoe",
""
]
] | In this paper we prove the non-linear stability of a system of non-linear wave equations satisfying the weak null condition. In particular, this includes the case of the non-linear stability of Minkowski spacetime times a $d$-torus subject to perturbations depending only on the non-compact coordinates. Our argument ver... |
2104.07889 | Minyong Guo | Haopeng Yan, Minyong Guo and Bin Chen | Observability of Zero-angular-momentum Sources Near Kerr Black Holes | 26 pages, 6 figures. Published in EPJC | null | 10.1140/epjc/s10052-021-09649-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit monochromatic and isotropic photon emissions from the
zero-angular\linebreak-momentum sources (ZAMSs) near a Kerr black hole. We
investigate the escape probability of the photons that can reach to infinity
and study the energy shifts of these escaping photons, which could be expressed
as the functions of t... | [
{
"created": "Fri, 16 Apr 2021 04:44:36 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Aug 2021 09:32:54 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Dec 2021 10:14:32 GMT",
"version": "v3"
}
] | 2021-12-03 | [
[
"Yan",
"Haopeng",
""
],
[
"Guo",
"Minyong",
""
],
[
"Chen",
"Bin",
""
]
] | We revisit monochromatic and isotropic photon emissions from the zero-angular\linebreak-momentum sources (ZAMSs) near a Kerr black hole. We investigate the escape probability of the photons that can reach to infinity and study the energy shifts of these escaping photons, which could be expressed as the functions of the... |
0709.0199 | Keisuke Izumi | Keisuke Izumi, Takahiro Tanaka | No de Sitter invariant vacuum in massive gravity theory with ghost | 5 pages | Prog. Theor. Phys. 121 (2009), 419 | 10.1143/PTP.121.419 | KUNS-2092 | gr-qc astro-ph hep-th | null | In this letter we point out that the massive gravity theory with a graviton
ghost mode in de Sitter background cannot possess a de Sitter invariant vacuum
state. In order to avoid a negative norm state, we must associate the creation
operator of the ghost mode with a negative-energy mode function instead of a
positiv... | [
{
"created": "Mon, 3 Sep 2007 11:55:54 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Sep 2007 10:05:11 GMT",
"version": "v2"
}
] | 2009-03-20 | [
[
"Izumi",
"Keisuke",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | In this letter we point out that the massive gravity theory with a graviton ghost mode in de Sitter background cannot possess a de Sitter invariant vacuum state. In order to avoid a negative norm state, we must associate the creation operator of the ghost mode with a negative-energy mode function instead of a positive-... |
gr-qc/0009034 | Gilles Esposito-Farese | G. Esposito-Farese and D. Polarski | Scalar-tensor gravity in an accelerating universe | 37 pages, LaTeX 2.09, REVTeX 3.0, uses epsf.tex to include 6
postscript figures | Phys.Rev. D63 (2001) 063504 | 10.1103/PhysRevD.63.063504 | CPT-2000/PE.4053 | gr-qc astro-ph | null | We consider scalar-tensor theories of gravity in an accelerating universe.
The equations for the background evolution and the perturbations are given in
full generality for any parametrization of the Lagrangian, and we stress that
apparent singularities are sometimes artifacts of a pathological choice of
variables. A... | [
{
"created": "Mon, 11 Sep 2000 16:40:25 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Esposito-Farese",
"G.",
""
],
[
"Polarski",
"D.",
""
]
] | We consider scalar-tensor theories of gravity in an accelerating universe. The equations for the background evolution and the perturbations are given in full generality for any parametrization of the Lagrangian, and we stress that apparent singularities are sometimes artifacts of a pathological choice of variables. Ado... |
gr-qc/9505017 | Alan Rendall | Alan D. Rendall | The initial singularity in solutions of the Einstein-Vlasov system of
Bianchi type I | 16 pages | J.Math.Phys.37:438-451,1996 | 10.1063/1.531400 | null | gr-qc | null | The dynamics of solutions of the Einstein-Vlasov system with Bianchi I
symmetry is discussed in the case of massive or massless particles. It is shown
that in the case of massive particles the solutions are asymptotic to isotropic
dust solutions at late times. The initial singularity is more difficult to
analyse. It ... | [
{
"created": "Mon, 15 May 1995 14:55:15 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Rendall",
"Alan D.",
""
]
] | The dynamics of solutions of the Einstein-Vlasov system with Bianchi I symmetry is discussed in the case of massive or massless particles. It is shown that in the case of massive particles the solutions are asymptotic to isotropic dust solutions at late times. The initial singularity is more difficult to analyse. It is... |
gr-qc/0005025 | Sergiu Vacaru | Sergiu I. Vacaru | Anholonomic Soliton-Dilaton and Black Hole Solutions in General
Relativity | revtex, twocolumns, 24 pages, version 3 with minor corrections | JHEP 0104:009,2001 | 10.1088/1126-6708/2001/04/009 | null | gr-qc hep-th math-ph math.MP nlin.SI | null | A new method of construction of integral varieties of Einstein equations in
three dimensional (3D) and 4D gravity is presented whereby, under corresponding
redefinition of physical values with respect to anholonomic frames of reference
with associated nonlinear connections, the structure of gravity field equations
is... | [
{
"created": "Tue, 9 May 2000 09:43:10 GMT",
"version": "v1"
},
{
"created": "Fri, 12 May 2000 13:38:55 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Jun 2000 08:02:11 GMT",
"version": "v3"
}
] | 2010-02-03 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | A new method of construction of integral varieties of Einstein equations in three dimensional (3D) and 4D gravity is presented whereby, under corresponding redefinition of physical values with respect to anholonomic frames of reference with associated nonlinear connections, the structure of gravity field equations is s... |
1901.08243 | Nikolaos Dimakis | T. Pailas, N. Dimakis, A. Karagiorgos, Petros A. Terzis, G.O.
Papadopoulos and T. Christodoulakis | Classical and quantum analysis of 3D electromagnetic pp-wave spacetime | 27 pages, no figures, updated to match the CQG published version | null | 10.1088/1361-6382/ab2561 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general classical solution of the 3D electromagnetic pp-wave spacetime
has been obtained. The relevant line element contains an arbitrary essential
function providing an infinite number of in-equivalent geometries as solutions.
A classification is presented based on the symmetry group. To the best of our
knowledg... | [
{
"created": "Thu, 24 Jan 2019 06:00:02 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 02:47:52 GMT",
"version": "v2"
}
] | 2019-05-31 | [
[
"Pailas",
"T.",
""
],
[
"Dimakis",
"N.",
""
],
[
"Karagiorgos",
"A.",
""
],
[
"Terzis",
"Petros A.",
""
],
[
"Papadopoulos",
"G. O.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | The general classical solution of the 3D electromagnetic pp-wave spacetime has been obtained. The relevant line element contains an arbitrary essential function providing an infinite number of in-equivalent geometries as solutions. A classification is presented based on the symmetry group. To the best of our knowledge,... |
2209.04358 | Nikolaos Karnesis | Nikolaos Karnesis, Nikolaos Stergioulas, Georgios Pappas, Charis
Anastopoulos, John Antoniadis, Theocharis Apostolatos, Spyros Basilakos,
Kyriakos Destounis, Areti Eleni, Georgios Lukes-Gerakopoulos, Konstantinos N.
Gourgouliatos, Kostas D. Kokkotas, George Kottaras, V K Oikonomou, Theodoros
Papanikolaou, Leand... | The Laser Interferometer Space Antenna mission in Greece White Paper | 11 pages, 2 figures | null | null | null | gr-qc astro-ph.CO astro-ph.GA physics.space-ph | http://creativecommons.org/licenses/by/4.0/ | The Laser Interferometer Space Antenna (LISA) mission, scheduled for launch
in the mid-2030s, is a gravitational wave observatory in space designed to
detect sources emitting in the millihertz band. LISA is an ESA flagship
mission, currently entering the Phase B development phase. It is expected to
help us improve ou... | [
{
"created": "Fri, 9 Sep 2022 15:44:06 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Sep 2022 10:54:12 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Sep 2022 06:46:13 GMT",
"version": "v3"
},
{
"created": "Thu, 21 Sep 2023 08:41:25 GMT",
"version": "v4"
}
] | 2023-09-22 | [
[
"Karnesis",
"Nikolaos",
""
],
[
"Stergioulas",
"Nikolaos",
""
],
[
"Pappas",
"Georgios",
""
],
[
"Anastopoulos",
"Charis",
""
],
[
"Antoniadis",
"John",
""
],
[
"Apostolatos",
"Theocharis",
""
],
[
"Basilakos",
... | The Laser Interferometer Space Antenna (LISA) mission, scheduled for launch in the mid-2030s, is a gravitational wave observatory in space designed to detect sources emitting in the millihertz band. LISA is an ESA flagship mission, currently entering the Phase B development phase. It is expected to help us improve our ... |
2206.10998 | Hideki Maeda | Takuma Sato, Hideki Maeda, Tomohiro Harada | Conformally Schwarzschild cosmological black holes | 58 pages, 10 figures, 8 tables; v3, this version corrects the
published version according to the corrigendum (2023 Class. Quantum Grav. 40,
079501). The main results remain unchanged | Class. Quant. Grav. 39 (2022) 21, 215011 | 10.1088/1361-6382/ac902f | RUP-22-13 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We thoroughly investigate conformally Schwarzschild spacetimes in different
coordinate systems to seek for physically reasonable models of a cosmological
black hole. We assume that a conformal factor depends only on the time
coordinate and that the spacetime is asymptotically flat
Friedmann-Lema\^{\i}tre-Robertson-Wa... | [
{
"created": "Wed, 22 Jun 2022 11:56:25 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Sep 2022 13:24:09 GMT",
"version": "v2"
},
{
"created": "Sun, 12 Mar 2023 07:52:23 GMT",
"version": "v3"
}
] | 2023-03-14 | [
[
"Sato",
"Takuma",
""
],
[
"Maeda",
"Hideki",
""
],
[
"Harada",
"Tomohiro",
""
]
] | We thoroughly investigate conformally Schwarzschild spacetimes in different coordinate systems to seek for physically reasonable models of a cosmological black hole. We assume that a conformal factor depends only on the time coordinate and that the spacetime is asymptotically flat Friedmann-Lema\^{\i}tre-Robertson-Walk... |
1411.4599 | David Nichols | \'Eanna \'E. Flanagan, David A. Nichols | Observer dependence of angular momentum in general relativity and its
relationship to the gravitational-wave memory effect | 19 pages, 2 figures. Matches version published in Phys. Rev. D with
errors in Appendix A corrected | Phys. Rev. D 92, 084057 (2015). Erratum: Phys. Rev. D 93 049905
(2016) | 10.1103/PhysRevD.92.084057 10.1103/PhysRevD.93.049905 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define a procedure by which observers can measure a type of
special-relativistic linear and angular momentum $(P^a, J^{ab})$ at a point in
a curved spacetime using only the spacetime geometry in a neighborhood of that
point. The method is chosen to yield the conventional results in stationary
spacetimes near futur... | [
{
"created": "Mon, 17 Nov 2014 19:21:43 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2015 17:45:05 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Oct 2015 18:42:02 GMT",
"version": "v3"
},
{
"created": "Mon, 1 Feb 2016 23:48:02 GMT",
"version": "v4"
}
] | 2016-06-08 | [
[
"Flanagan",
"Éanna É.",
""
],
[
"Nichols",
"David A.",
""
]
] | We define a procedure by which observers can measure a type of special-relativistic linear and angular momentum $(P^a, J^{ab})$ at a point in a curved spacetime using only the spacetime geometry in a neighborhood of that point. The method is chosen to yield the conventional results in stationary spacetimes near future ... |
gr-qc/0702099 | Andrea Passamonti | Andrea Passamonti, Nikolaos Stergioulas, Alessandro Nagar | Gravitational Waves from Nonlinear Couplings of Radial and Polar
Nonradial Modes in Relativistic Stars | 12 pages, 7 figures, ReVTeX 4.0, submitted to Phys. Rev. D | Phys.Rev.D75:084038,2007 | 10.1103/PhysRevD.75.084038 | null | gr-qc astro-ph | null | The post-bounce oscillations of newly-born relativistic stars are expected to
lead to gravitational-wave emission through the excitation of nonradial
oscillation modes. At the same time, the star is oscillating in its radial
modes, with a central density variation that can reach several percent.
Nonlinear couplings b... | [
{
"created": "Sat, 17 Feb 2007 17:39:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Passamonti",
"Andrea",
""
],
[
"Stergioulas",
"Nikolaos",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The post-bounce oscillations of newly-born relativistic stars are expected to lead to gravitational-wave emission through the excitation of nonradial oscillation modes. At the same time, the star is oscillating in its radial modes, with a central density variation that can reach several percent. Nonlinear couplings bet... |
gr-qc/0612062 | Lau Loi So | Lau Loi So and James M. Nester | On source coupling and the teleparallel equivalent to GR | 5 pages | Proceedings of the tenth Marcel Grossman meeting on general
relativity 2003, p.1498. | null | null | gr-qc | null | Alternatives to the usual general relativity (GR) Riemannian framework
include Riemann-Cartan and teleparallel geometry. The ``teleparallel equivalent
of GR" (TEGR, aka GR${}_{||}$) has certain virtues, however there have been
allegations of serious source coupling limitations. Now it is quite
straightforward to show... | [
{
"created": "Mon, 11 Dec 2006 12:11:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"So",
"Lau Loi",
""
],
[
"Nester",
"James M.",
""
]
] | Alternatives to the usual general relativity (GR) Riemannian framework include Riemann-Cartan and teleparallel geometry. The ``teleparallel equivalent of GR" (TEGR, aka GR${}_{||}$) has certain virtues, however there have been allegations of serious source coupling limitations. Now it is quite straightforward to show t... |
0802.0788 | Sini R | Sini R, Nijo Varghese, V. C. Kuriakose | Quasi-normal modes of spherically symmetric black hole spacetimes with
cosmic string in a Dirac field | 16 pages, 16 figures, title, abstract and content in section 2
changed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dirac equation for a general black hole metric having a cosmic string is
derived. The quasi-normal mode frequencies for Schwarzschild, RN extremal, SdS
and near extremal SdS black hole space-times with cosmic string perturbed by a
massless Dirac field are obtained using WKB approximation and found that in all
these c... | [
{
"created": "Wed, 6 Feb 2008 13:16:29 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Sep 2008 12:27:30 GMT",
"version": "v2"
}
] | 2008-09-02 | [
[
"R",
"Sini",
""
],
[
"Varghese",
"Nijo",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | Dirac equation for a general black hole metric having a cosmic string is derived. The quasi-normal mode frequencies for Schwarzschild, RN extremal, SdS and near extremal SdS black hole space-times with cosmic string perturbed by a massless Dirac field are obtained using WKB approximation and found that in all these cas... |
0901.4674 | Jurjen Koksma | Jurjen F. Koksma (Utrecht University), Tomislav Prokopec (Utrecht
University) | Fermion Propagator in Cosmological Spaces with Constant Deceleration | 18 pages, 1 figure, published version | Class.Quant.Grav.26:125003,2009 | 10.1088/0264-9381/26/12/125003 | ITP-UU-09/01, SPIN-09/01 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the fermion propagator in FLRW spacetimes with constant
deceleration $q=\epsilon-1$, $\epsilon=-\dot{H}/H^{2}$ for excited states. For
fermions whose mass is generated by a scalar field through a Yukawa coupling
$m=g_{\mathrm{\scriptscriptstyle{Y}}} \phi$, we assume $\phi \propto H$. We
first solve for t... | [
{
"created": "Thu, 29 Jan 2009 13:17:58 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2009 17:03:21 GMT",
"version": "v2"
}
] | 2010-01-15 | [
[
"Koksma",
"Jurjen F.",
"",
"Utrecht University"
],
[
"Prokopec",
"Tomislav",
"",
"Utrecht\n University"
]
] | We calculate the fermion propagator in FLRW spacetimes with constant deceleration $q=\epsilon-1$, $\epsilon=-\dot{H}/H^{2}$ for excited states. For fermions whose mass is generated by a scalar field through a Yukawa coupling $m=g_{\mathrm{\scriptscriptstyle{Y}}} \phi$, we assume $\phi \propto H$. We first solve for the... |
gr-qc/0105054 | Elisa Di Pietro | Elisa Di Pietro | Scale factor duality in quintessence models ? | 10 pages, 3 figures, submitted to Mod.Phys.Lett.A | null | null | null | gr-qc astro-ph | null | We consider several kinds of quintessence models in the framework of scale
factor duality. We show that this symmetry exists only for a very small number
of quintessence potentials. We then apply the duality transformations found to
several analytical solutions. It turns out that, in some cases, the presence of
the p... | [
{
"created": "Wed, 16 May 2001 09:07:36 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Di Pietro",
"Elisa",
""
]
] | We consider several kinds of quintessence models in the framework of scale factor duality. We show that this symmetry exists only for a very small number of quintessence potentials. We then apply the duality transformations found to several analytical solutions. It turns out that, in some cases, the presence of the pot... |
gr-qc/9811010 | Garcia | L.C.Garcia de Andrade | On the non-minimal coupling of Riemann-flat Klein-Gordon | 5 pages, Latex | null | null | null | gr-qc | null | On the non-minimal coupling of Riemann-flat Klein-Gordon Fields to Space-time
torsion} The energy spectrum of Klein-Gordon particles is obtained via the
non-minimal coupling of Klein-Gordon fields to Cartan torsion in the
approximation of Riemann-flatness and constant torsion.When the mass squared is
proportional to ... | [
{
"created": "Tue, 3 Nov 1998 22:24:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | On the non-minimal coupling of Riemann-flat Klein-Gordon Fields to Space-time torsion} The energy spectrum of Klein-Gordon particles is obtained via the non-minimal coupling of Klein-Gordon fields to Cartan torsion in the approximation of Riemann-flatness and constant torsion.When the mass squared is proportional to to... |
2304.07364 | Silas Vilhena | S. G. Vilhena, M. Dutra, O. Louren\c{c}o, P. J. Pompeia | Dark matter effects in modified teleparallel gravity | 8 pages, 2 figures | Phys. Rev. D. 108, 104051 (2023) | 10.1103/PhysRevD.108.104051 | null | gr-qc astro-ph.HE nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work investigates dark matter (DM) effects in compact objects in
modified teleparallel gravity (MTG) in which a modification of Teleparallel
Equivalent to General Relativity is used. We applied a tetrad to the modified
field equations where a set of relations is found. The conservation equation
allows us to rewr... | [
{
"created": "Fri, 14 Apr 2023 19:49:29 GMT",
"version": "v1"
}
] | 2023-11-30 | [
[
"Vilhena",
"S. G.",
""
],
[
"Dutra",
"M.",
""
],
[
"Lourenço",
"O.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | This work investigates dark matter (DM) effects in compact objects in modified teleparallel gravity (MTG) in which a modification of Teleparallel Equivalent to General Relativity is used. We applied a tetrad to the modified field equations where a set of relations is found. The conservation equation allows us to rewrit... |
1412.2054 | Giulia Gubitosi | Michele Arzano, Giulia Gubitosi, Joao Magueijo, Giovanni
Amelino-Camelia | Planck-scale phenomenology with anti-de Sitter momentum space | null | Phys. Rev. D 92, 024028 (2015) | 10.1103/PhysRevD.92.024028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the anti-de Sitter (AdS) counterpart to the well studied de
Sitter (dS) model for energy-momentum space, viz "$\kappa$-momentum space"
space (with a structure based on the properties of the $\kappa$-Poincar\'e Hopf
algebra). On the basis of previous preliminary results one might expect the two
models t... | [
{
"created": "Fri, 5 Dec 2014 16:43:54 GMT",
"version": "v1"
}
] | 2015-07-22 | [
[
"Arzano",
"Michele",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
],
[
"Amelino-Camelia",
"Giovanni",
""
]
] | We investigate the anti-de Sitter (AdS) counterpart to the well studied de Sitter (dS) model for energy-momentum space, viz "$\kappa$-momentum space" space (with a structure based on the properties of the $\kappa$-Poincar\'e Hopf algebra). On the basis of previous preliminary results one might expect the two models to ... |
gr-qc/0001062 | Patrice Hello | T. Pradier, N. Arnaud, M.-A. Bizouard, F. Cavalier, M. Davier and P.
Hello | About the detection of gravitational wave bursts | 5 pages, proceedings of GWDAW99 (Roma, Dec. 1999), to appear in Int.
J. Mod. Phys. D | Int.J.Mod.Phys. D9 (2000) 309-314 | 10.1142/S0218271800000335 | null | gr-qc | null | Several filtering methods for the detection of gravitational wave bursts in
interferometric detectors are presented. These are simple and fast methods
which can act as online triggers. All methods are compared to matched filtering
with the help of a figure of merit based on the detection of supernovae signals
simulat... | [
{
"created": "Fri, 21 Jan 2000 09:14:52 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pradier",
"T.",
""
],
[
"Arnaud",
"N.",
""
],
[
"Bizouard",
"M. -A.",
""
],
[
"Cavalier",
"F.",
""
],
[
"Davier",
"M.",
""
],
[
"Hello",
"P.",
""
]
] | Several filtering methods for the detection of gravitational wave bursts in interferometric detectors are presented. These are simple and fast methods which can act as online triggers. All methods are compared to matched filtering with the help of a figure of merit based on the detection of supernovae signals simulated... |
1306.5633 | Wei Zhang | Yi Ling, Chao Niu, Yu Tian, Xiao-Ning Wu and Wei Zhang | The Petrov-like boundary condition at finite cutoff surface in
Gravity/Fluid duality | 17 pages, no figures, published in PRD | Phys. Rev. D 90, 043525 (2014) | 10.1103/PhysRevD.90.043525 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previously it has been shown that imposing a Petrov-like boundary condition
on a hypersurface may reduce the Einstein equation to the incompressible
Navier-Stokes equation, but all these correspondences are established in the
near horizon limit. In this note, we remark that this strategy can be extended
to an arbitra... | [
{
"created": "Mon, 24 Jun 2013 14:01:58 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2013 14:06:51 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Aug 2014 15:23:58 GMT",
"version": "v3"
}
] | 2014-08-27 | [
[
"Ling",
"Yi",
""
],
[
"Niu",
"Chao",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Xiao-Ning",
""
],
[
"Zhang",
"Wei",
""
]
] | Previously it has been shown that imposing a Petrov-like boundary condition on a hypersurface may reduce the Einstein equation to the incompressible Navier-Stokes equation, but all these correspondences are established in the near horizon limit. In this note, we remark that this strategy can be extended to an arbitrary... |
2101.09168 | Faizuddin Ahmed | Faizuddin Ahmed | Linear confinement of generalized KG-oscillator with a uniform magnetic
field in Kaluza-Klein theory and Aharonov-Bohm effect | 23 pages, accepted in Scientific Reports journal. arXiv admin note:
text overlap with arXiv:2008.04745 | Sci. Rep. 11, 1742 (2021) | 10.1038/s41598-021-81273-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we solve generalized KG-oscillator interacts with a uniform
magnetic field in five-dimensional space-time background produced by
topological defects under a linear confining potential using the Kaluza-Klein
theory. We solve this equation and analyze an analogue of the Aharonov-Bohm
effect for bound sta... | [
{
"created": "Thu, 21 Jan 2021 11:53:11 GMT",
"version": "v1"
}
] | 2021-01-25 | [
[
"Ahmed",
"Faizuddin",
""
]
] | In this paper, we solve generalized KG-oscillator interacts with a uniform magnetic field in five-dimensional space-time background produced by topological defects under a linear confining potential using the Kaluza-Klein theory. We solve this equation and analyze an analogue of the Aharonov-Bohm effect for bound state... |
1301.1479 | Sunil Maharaj | A. M. Msomi, K. S Govinder, S. D. Maharaj | Applications of Lie Symmetries to Higher Dimensional Gravitating Fluid | 10 pages, To appear in Int. J. Theor. Phys. arXiv admin note: text
overlap with arXiv:1212.6655 | Int. J. Theor. Phys. 51: 1290-1299, 2012 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a radiating shear-free spherically symmetric metric in higher
dimensions. Several new solutions to the Einstein's equations are found
systematically using the method of Lie analysis of differential equations.
Using the five Lie point symmetries of the fundamental field equation, we
obtain either an implic... | [
{
"created": "Tue, 8 Jan 2013 10:39:53 GMT",
"version": "v1"
}
] | 2013-01-09 | [
[
"Msomi",
"A. M.",
""
],
[
"Govinder",
"K. S",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We consider a radiating shear-free spherically symmetric metric in higher dimensions. Several new solutions to the Einstein's equations are found systematically using the method of Lie analysis of differential equations. Using the five Lie point symmetries of the fundamental field equation, we obtain either an implicit... |
2408.01863 | Biswajit Deb | Biswajit Deb, Atri Deshamukhya | Slow-roll Hilltop Inflation in $f(\phi,T)$ gravity | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Over the last four decades, a number of modified gravity theories have been
proposed to study cosmological phenomena as they can provide solutions for some
of the shortcomings of Einstein's gravity in explaining early and late time
accelerations of the observed Universe, the existence of dark matter,
singularities at... | [
{
"created": "Sat, 3 Aug 2024 20:53:02 GMT",
"version": "v1"
}
] | 2024-08-06 | [
[
"Deb",
"Biswajit",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | Over the last four decades, a number of modified gravity theories have been proposed to study cosmological phenomena as they can provide solutions for some of the shortcomings of Einstein's gravity in explaining early and late time accelerations of the observed Universe, the existence of dark matter, singularities at c... |
2110.05953 | Ding Jia | Ding Jia | Complex, Lorentzian, and Euclidean simplicial quantum gravity: numerical
methods and physical prospects | matches well published version | Class. Quantum Grav. 39, 065002 (2022) | 10.1088/1361-6382/ac4b04 | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Evaluating gravitational path integrals in the Lorentzian has been a
long-standing challenge due to the numerical sign problem. We show that this
challenge can be overcome in simplicial quantum gravity. By deforming the
integration contour into the complex, the sign fluctuations can be suppressed,
for instance using ... | [
{
"created": "Mon, 11 Oct 2021 02:35:37 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2021 15:17:18 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Mar 2022 20:52:56 GMT",
"version": "v3"
}
] | 2022-03-03 | [
[
"Jia",
"Ding",
""
]
] | Evaluating gravitational path integrals in the Lorentzian has been a long-standing challenge due to the numerical sign problem. We show that this challenge can be overcome in simplicial quantum gravity. By deforming the integration contour into the complex, the sign fluctuations can be suppressed, for instance using th... |
2203.04081 | Iver Brevik | I. Brevik and A. V. Timoshkin | Holographic representation of the unified early and late universe via a
viscous dark fluid | 6 pages, minor changes in the references; to appear in Int. J. Geom.
Meth. Mod. Phys | Int. J. Geom. Meth. Mod. Phys. 19, 2250113 (2022) | 10.1142/S0219887822501134 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article we apply the holographic principle for describing in a
unifying way the early and the late-time universe, when the general equation of
state contains a bulk viscosity. We use the idea of a generalized cut-off
holographic dark energy introduced by Nojiri and Odintsov (2006,2017), and
study the evolutio... | [
{
"created": "Tue, 8 Mar 2022 13:52:47 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Apr 2022 18:52:02 GMT",
"version": "v2"
}
] | 2022-06-24 | [
[
"Brevik",
"I.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | In this article we apply the holographic principle for describing in a unifying way the early and the late-time universe, when the general equation of state contains a bulk viscosity. We use the idea of a generalized cut-off holographic dark energy introduced by Nojiri and Odintsov (2006,2017), and study the evolution ... |
2407.12328 | Ran Chen | Ran Chen, Zhao Li, Yin-Jie Li, Yi-Ying Wang, Rui Niu, Wen Zhao, and
Yi-Zhong Fan | Forecast Analysis of Astrophysical Stochastic Gravitational Wave
Background beyond general relativity: A Case Study on Brans-Dicke Gravity | 26 pages, 6 figures, and 2 tables | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor gravity, exemplified by Brans-Dicke (BD) gravity, introduces
additional scalar polarization modes that contribute scalar radiation alongside
tensor modes. We conduct a comprehensive analysis of how gravitational wave
generation and propagation effects under Brans-Dicke gravity are encoded into
the astro... | [
{
"created": "Wed, 17 Jul 2024 06:07:03 GMT",
"version": "v1"
}
] | 2024-07-18 | [
[
"Chen",
"Ran",
""
],
[
"Li",
"Zhao",
""
],
[
"Li",
"Yin-Jie",
""
],
[
"Wang",
"Yi-Ying",
""
],
[
"Niu",
"Rui",
""
],
[
"Zhao",
"Wen",
""
],
[
"Fan",
"Yi-Zhong",
""
]
] | Scalar-tensor gravity, exemplified by Brans-Dicke (BD) gravity, introduces additional scalar polarization modes that contribute scalar radiation alongside tensor modes. We conduct a comprehensive analysis of how gravitational wave generation and propagation effects under Brans-Dicke gravity are encoded into the astroph... |
2408.07864 | Jacob Taylor | Jacob A. Taylor, Rand Burnette, Bence B\'ecsy, Neil J. Cornish | Fast wavelet basis search for generic gravitational wave bursts in
Pulsar Timing Array data | 13 pages, 7 figures, submitted to PRD | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As we move into an era of more sensitive pulsar timing array data sets, we
may be able to resolve individual gravitational wave sources from the
stochastic gravitational wave background. While some of these sources, like
orbiting massive black hole binaries, have well-defined waveform models, there
could also be sign... | [
{
"created": "Thu, 15 Aug 2024 00:23:03 GMT",
"version": "v1"
}
] | 2024-08-16 | [
[
"Taylor",
"Jacob A.",
""
],
[
"Burnette",
"Rand",
""
],
[
"Bécsy",
"Bence",
""
],
[
"Cornish",
"Neil J.",
""
]
] | As we move into an era of more sensitive pulsar timing array data sets, we may be able to resolve individual gravitational wave sources from the stochastic gravitational wave background. While some of these sources, like orbiting massive black hole binaries, have well-defined waveform models, there could also be signal... |
1703.09057 | William Cunningham | William Cunningham, Konstantin Zuev, and Dmitri Krioukov | Navigability of Random Geometric Graphs in the Universe and Other
Spacetimes | 15 pages, 10 figures | Sci. Rep. 7, 8699 (2017) | 10.1038/s41598-017-08872-4 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Random geometric graphs in hyperbolic spaces explain many common structural
and dynamical properties of real networks, yet they fail to predict the correct
values of the exponents of power-law degree distributions observed in real
networks. In that respect, random geometric graphs in asymptotically de Sitter
spacetim... | [
{
"created": "Thu, 16 Mar 2017 18:18:05 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2017 13:44:22 GMT",
"version": "v2"
}
] | 2017-11-15 | [
[
"Cunningham",
"William",
""
],
[
"Zuev",
"Konstantin",
""
],
[
"Krioukov",
"Dmitri",
""
]
] | Random geometric graphs in hyperbolic spaces explain many common structural and dynamical properties of real networks, yet they fail to predict the correct values of the exponents of power-law degree distributions observed in real networks. In that respect, random geometric graphs in asymptotically de Sitter spacetimes... |
1508.01825 | Cecilia Chirenti | Cecilia Chirenti and Manuela G. Rodrigues | Effect of a variable cosmological constant on black hole quasinormal
modes | 6 pages, 2 figures, v2: final version accepted for publication in
Phys.Rev.D | Phys. Rev. D 92, 084051 (2015) | 10.1103/PhysRevD.92.084051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many different cosmological models have been proposed to address the
cosmological constant problem and the coincidence problem. We compare here four
different models that can be used to describe an effective (time-dependent)
cosmological constant $\Lambda(z)$. A numerical analysis of the $\Lambda(z)$
evolution obtain... | [
{
"created": "Fri, 7 Aug 2015 21:44:23 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Oct 2015 17:03:09 GMT",
"version": "v2"
}
] | 2015-10-28 | [
[
"Chirenti",
"Cecilia",
""
],
[
"Rodrigues",
"Manuela G.",
""
]
] | Many different cosmological models have been proposed to address the cosmological constant problem and the coincidence problem. We compare here four different models that can be used to describe an effective (time-dependent) cosmological constant $\Lambda(z)$. A numerical analysis of the $\Lambda(z)$ evolution obtained... |
2403.11864 | Franz Hinterleitner | F. Hinterleitner | Symmetry-reduced Loop Quantum Gravity: Plane Waves, Flat Space and the
Hamiltonian Constraint | 34 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Loop quantum gravity methods are applied to a symmetry-reduced model with
homogeneity in two dimensions, derived from a Gowdy model [5,6]. The conditions
for propagation of unidirectional plane gravitational waves at exactly the
speed of light are set up in form of null Killing equations in terms of
Ashtekar variable... | [
{
"created": "Mon, 18 Mar 2024 15:17:44 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Hinterleitner",
"F.",
""
]
] | Loop quantum gravity methods are applied to a symmetry-reduced model with homogeneity in two dimensions, derived from a Gowdy model [5,6]. The conditions for propagation of unidirectional plane gravitational waves at exactly the speed of light are set up in form of null Killing equations in terms of Ashtekar variables ... |
gr-qc/9610031 | Ghanashyam Date | G. Date | On a Static Solution to Einstein Equations with incoming and outgoing
radiation | 20 pages, latex, needs psfig.tex macro. An appendix is added
discussing more general situations and matching conditions. Accepted for
publication in General Relativity and Gravitation | Gen.Rel.Grav.29:953,1997 | 10.1023/A:1018864423958 | IMSc-96/09/28 | gr-qc | null | Einstein equations with $T_{\mu\nu} = k_\mu k_\nu + \ell_\mu \ell_\nu$ where
$k, \ell$ are null are considered with spherical symmetry and staticity. The
solution has naked singularity and is not asymptotically flat. However, it may
be interpreted as an envelope for any static spherical body making it more
massive. S... | [
{
"created": "Tue, 15 Oct 1996 15:00:36 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Feb 1997 06:15:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Date",
"G.",
""
]
] | Einstein equations with $T_{\mu\nu} = k_\mu k_\nu + \ell_\mu \ell_\nu$ where $k, \ell$ are null are considered with spherical symmetry and staticity. The solution has naked singularity and is not asymptotically flat. However, it may be interpreted as an envelope for any static spherical body making it more massive. Suc... |
gr-qc/9706030 | Fabio Scardigli | Fabio Scardigli (Dep. of Phys., Univ. of Milano, Italy) | Black Hole Entropy: a spacetime foam approach | 23 pages, no figures, postscript file gzipped,to be published in
Classical and Quantum Gravity, July 1997 | Class.Quant.Grav. 14 (1997) 1781-1793 | 10.1088/0264-9381/14/7/014 | null | gr-qc hep-th | null | The spacetime foam structure is reviewed briefly (topogical fluctuations and
virtual black hole possibility; equation of state of the foam). A model of
space foam at the surface of the event horizon is introduced. The model is
applied to the calculus of the number of states of a black hole, of its entropy
and of othe... | [
{
"created": "Wed, 11 Jun 1997 17:44:00 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Scardigli",
"Fabio",
"",
"Dep. of Phys., Univ. of Milano, Italy"
]
] | The spacetime foam structure is reviewed briefly (topogical fluctuations and virtual black hole possibility; equation of state of the foam). A model of space foam at the surface of the event horizon is introduced. The model is applied to the calculus of the number of states of a black hole, of its entropy and of other ... |
gr-qc/0506049 | Muhammad Sharif | M. Sharif | Symmetries of Locally Rotationally Symmetric Models | 12 pages, accepted for publication in Int. J. of Mod. Phys. D | Int.J.Mod.Phys. D14 (2005) 1675-1684 | 10.1142/S0218271805007322 | null | gr-qc | null | Matter collineations of locally rotationally symmetric spacetimes are
considered. These are investigated when the energy-momentum tensor is
degenerate. We know that the degenerate case provides infinite dimensional
matter collineations in most of the cases. However, an interesting case arises
where we obtain proper m... | [
{
"created": "Wed, 8 Jun 2005 08:54:01 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sharif",
"M.",
""
]
] | Matter collineations of locally rotationally symmetric spacetimes are considered. These are investigated when the energy-momentum tensor is degenerate. We know that the degenerate case provides infinite dimensional matter collineations in most of the cases. However, an interesting case arises where we obtain proper mat... |
gr-qc/0009066 | Guido Pizzella | P. Astone, M. Bassan, P. Bonifazi, P. Carelli, E. Coccia, S.D'Antonio,
V. Fafone, G.Federici, A. Marini, G. Mazzitelli, Y. Minenkov, I. Modena, G.
Modestino, A. Moleti, G. V. Pallottino, V. Pampaloni, G. Pizzella,
L.Quintieri, F. Ronga, R. Terenzi, M. Visco, L. Votano | Energetic Cosmic Rays observed by the resonant gravitational wave
detector NAUTILUS | Submitted to Phys. Letters B | Phys.Lett.B499:16-22,2001 | 10.1016/S0370-2693(01)00026-0 | Frascati Report LNF-00/023 (P 19 Sep 2000) | gr-qc astro-ph | null | Cosmic ray showers interacting with the resonant mass gravitational wave
antenna NAUTILUS have been detected. The experimental results show large
signals at a rate much greater than expected. The largest signal corresponds to
an energy release in NAUTILUS of 87 TeV. We remark that a resonant mass
gravitational wave d... | [
{
"created": "Tue, 19 Sep 2000 08:04:10 GMT",
"version": "v1"
}
] | 2011-08-17 | [
[
"Astone",
"P.",
""
],
[
"Bassan",
"M.",
""
],
[
"Bonifazi",
"P.",
""
],
[
"Carelli",
"P.",
""
],
[
"Coccia",
"E.",
""
],
[
"D'Antonio",
"S.",
""
],
[
"Fafone",
"V.",
""
],
[
"Federici",
"G.",
... | Cosmic ray showers interacting with the resonant mass gravitational wave antenna NAUTILUS have been detected. The experimental results show large signals at a rate much greater than expected. The largest signal corresponds to an energy release in NAUTILUS of 87 TeV. We remark that a resonant mass gravitational wave det... |
1908.09469 | Timothy Budd | Jerome Barkley, Timothy Budd | Precision measurements of Hausdorff dimensions in two-dimensional
quantum gravity | 26 pages, 15 figures | Class. Quantum Grav. 36 (2019) 244001 | 10.1088/1361-6382/ab4f21 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-dimensional quantum gravity, defined either via scaling limits of random
discrete surfaces or via Liouville quantum gravity, is known to possess a
geometry that is genuinely fractal with a Hausdorff dimension equal to 4.
Coupling gravity to a statistical system at criticality changes the fractal
properties of the... | [
{
"created": "Mon, 26 Aug 2019 04:51:46 GMT",
"version": "v1"
}
] | 2020-02-05 | [
[
"Barkley",
"Jerome",
""
],
[
"Budd",
"Timothy",
""
]
] | Two-dimensional quantum gravity, defined either via scaling limits of random discrete surfaces or via Liouville quantum gravity, is known to possess a geometry that is genuinely fractal with a Hausdorff dimension equal to 4. Coupling gravity to a statistical system at criticality changes the fractal properties of the g... |
1712.07855 | Abdulla Al Mamon | Abdulla Al Mamon | A new parametrization for dark energy density and future deceleration | 6 pages, 3 figures, title has been changed, references added, revised
version accepted for publication in MPLA | null | 10.1142/S0217732318501134 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have proposed a general dark energy density parametrization
to study the evolution of the universe. We have also constrained the model
parameters using the combination of Type Ia supernova (SNIa), baryonic acoustic
oscillations (BAO), cosmic microwave background radiation (CMB) and
observational $H(z... | [
{
"created": "Thu, 21 Dec 2017 10:11:58 GMT",
"version": "v1"
},
{
"created": "Wed, 23 May 2018 09:52:36 GMT",
"version": "v2"
}
] | 2018-07-25 | [
[
"Mamon",
"Abdulla Al",
""
]
] | In this work, we have proposed a general dark energy density parametrization to study the evolution of the universe. We have also constrained the model parameters using the combination of Type Ia supernova (SNIa), baryonic acoustic oscillations (BAO), cosmic microwave background radiation (CMB) and observational $H(z)$... |
2009.01213 | Jeremy Sakstein | Jeremy Sakstein, Djuna Croon, Samuel D. McDermott, Maria C. Straight,
Eric J. Baxter | Beyond the Standard Model Explanations of GW190521 | Four pages, one figure. Comments welcome | Phys. Rev. Lett. 125, 261105 (2020) | 10.1103/PhysRevLett.125.261105 | FERMILAB-PUB-20-461-T | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO/Virgo collaboration has recently announced the detection of a heavy
binary black hole merger, with component masses that cannot be explained by
standard stellar structure theory. In this letter we propose several
explanations based on models of new physics, including new light particle
losses, modified gravi... | [
{
"created": "Wed, 2 Sep 2020 17:38:53 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Sakstein",
"Jeremy",
""
],
[
"Croon",
"Djuna",
""
],
[
"McDermott",
"Samuel D.",
""
],
[
"Straight",
"Maria C.",
""
],
[
"Baxter",
"Eric J.",
""
]
] | The LIGO/Virgo collaboration has recently announced the detection of a heavy binary black hole merger, with component masses that cannot be explained by standard stellar structure theory. In this letter we propose several explanations based on models of new physics, including new light particle losses, modified gravity... |
2404.06979 | Loris Del Grosso | Emanuele Berti, Valerio De Luca, Loris Del Grosso, Paolo Pani | Tidal Love numbers and approximate universal relations for fermion
soliton stars | 15 pages, 4 figures. v2: new figure added, matches version accepted
in PRD | Phys. Rev. D 109, 124008 (2024) | 10.1103/PhysRevD.109.124008 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fermion soliton stars are a consistent model of exotic compact objects which
involve a nonlinear interaction between a real scalar field and fermions
through a Yukawa term. This interaction results in an effective fermion mass
that depends upon the vacuum structure in the scalar potential. In this work we
investigate... | [
{
"created": "Wed, 10 Apr 2024 12:49:31 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jun 2024 08:07:15 GMT",
"version": "v2"
}
] | 2024-06-07 | [
[
"Berti",
"Emanuele",
""
],
[
"De Luca",
"Valerio",
""
],
[
"Del Grosso",
"Loris",
""
],
[
"Pani",
"Paolo",
""
]
] | Fermion soliton stars are a consistent model of exotic compact objects which involve a nonlinear interaction between a real scalar field and fermions through a Yukawa term. This interaction results in an effective fermion mass that depends upon the vacuum structure in the scalar potential. In this work we investigate t... |
2203.07066 | B\'eatrice Bonga | Ivan Agullo, B\'eatrice Bonga, Patricia Ribes Metidieri | Does inflation squeeze cosmological perturbations? | 19 pages + 8 pages as appendices | null | 10.1088/1475-7516/2022/09/032 | null | gr-qc astro-ph.CO hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | There seems to exist agreement about the fact that inflation squeezes the
quantum state of cosmological perturbations and entangles modes with
wavenumbers $\vec k$ and $-\vec k$. Paradoxically, this result has been used to
justify both the classicality as well as the quantumness of the primordial
perturbations at the... | [
{
"created": "Mon, 14 Mar 2022 13:02:46 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Agullo",
"Ivan",
""
],
[
"Bonga",
"Béatrice",
""
],
[
"Metidieri",
"Patricia Ribes",
""
]
] | There seems to exist agreement about the fact that inflation squeezes the quantum state of cosmological perturbations and entangles modes with wavenumbers $\vec k$ and $-\vec k$. Paradoxically, this result has been used to justify both the classicality as well as the quantumness of the primordial perturbations at the e... |
gr-qc/9812025 | Robert D. Klauber | Robert D. Klauber | Relativistically Rotating Frames and Non-time-orthogonality | 4 pages, no figures. Brief overview of more extensive article
published in Found. Phys. Lett. 11 (5) 405, Oct 98. Rev includes both LaTeX
and HTML files | Am.J.Phys. 67 (1999) 158-159 | 10.1119/1.19213 | null | gr-qc | null | This paper is a brief overview of a more extensive article recently published
in Found. Phys. Lett. [2]. Apparent disagreement with experiment as well as
internal inconsistencies found in the traditional analysis of relativistically
rotating frames/disks are summarized. As one example, a point p at 0 degrees on
the c... | [
{
"created": "Mon, 7 Dec 1998 16:09:21 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jan 1999 18:05:20 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Jun 2001 21:28:51 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Klauber",
"Robert D.",
""
]
] | This paper is a brief overview of a more extensive article recently published in Found. Phys. Lett. [2]. Apparent disagreement with experiment as well as internal inconsistencies found in the traditional analysis of relativistically rotating frames/disks are summarized. As one example, a point p at 0 degrees on the cir... |
1412.0944 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig and Vance D. Gladney | Revisiting galactic rotation curves given a noncommutative-geometry
background | 7 pages, 3 figures | Journal of Modern Physics, vol. 5, 1931-1937 (2014) | 10.4236/jmp.2014.517187 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was shown earlier by Rahaman et al. that a noncommutative-geometry
background can account for galactic rotation curves without the need for dark
matter. The smearing effect that characterizes noncommutative geometry is
described by means of a Gaussian distribution intended to replace the Dirac
delta function. The ... | [
{
"created": "Tue, 2 Dec 2014 15:32:31 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Kuhfittig",
"Peter K. F.",
""
],
[
"Gladney",
"Vance D.",
""
]
] | It was shown earlier by Rahaman et al. that a noncommutative-geometry background can account for galactic rotation curves without the need for dark matter. The smearing effect that characterizes noncommutative geometry is described by means of a Gaussian distribution intended to replace the Dirac delta function. The pu... |
1304.2833 | Miguel Socolovsky | M. Socolovsky | Rindler Space and Unruh Effect | 31 pages, 13 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the geometry of the Rindler space induced by hyperbolic motion in
special relativity, and its applications to the calculation of the Unruh effect
in flat spacetime, and to the Hawking temperature of the Schwarzschild black
hole.
| [
{
"created": "Wed, 10 Apr 2013 03:11:46 GMT",
"version": "v1"
},
{
"created": "Mon, 20 May 2013 21:06:55 GMT",
"version": "v2"
}
] | 2013-05-22 | [
[
"Socolovsky",
"M.",
""
]
] | We review the geometry of the Rindler space induced by hyperbolic motion in special relativity, and its applications to the calculation of the Unruh effect in flat spacetime, and to the Hawking temperature of the Schwarzschild black hole. |
1807.06048 | Guillem Dom\`enech | Guillem Dom\`enech, Shinji Mukohyama, Ryo Namba and Vassilis
Papadopoulos | Vector disformal transformation of generalized Proca theory | null | Phys. Rev. D 98, 064037 (2018) | 10.1103/PhysRevD.98.064037 | YITP-18-55, IPMU18-0092 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the GW170817/GRB170817A constraint on the deviation of the speed
of gravitational waves from that of photons, we study disformal transformations
of the metric in the context of the generalized Proca theory. The constraint
restricts the form of the gravity Lagrangian, the way the electromagnetism
couples ... | [
{
"created": "Mon, 16 Jul 2018 18:25:15 GMT",
"version": "v1"
}
] | 2018-09-26 | [
[
"Domènech",
"Guillem",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Namba",
"Ryo",
""
],
[
"Papadopoulos",
"Vassilis",
""
]
] | Motivated by the GW170817/GRB170817A constraint on the deviation of the speed of gravitational waves from that of photons, we study disformal transformations of the metric in the context of the generalized Proca theory. The constraint restricts the form of the gravity Lagrangian, the way the electromagnetism couples to... |
2106.10553 | Massimo Tinto | Massimo Tinto, Sanjeev Dhurandhar, Prasanna Joshi | Reply to the Bayle {\it et al.} gr-qc document dated June 7, 2021} | 5 pages, no figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the two issues raised by Bayle, Vallisneri, Babak, and Petiteau
(in their gr-qc document arXiv:2106.03976) about our matrix formulation of
Time-Delay Interferometry (TDI) (arXiv:2105.02054) \cite{TDJ21}. In so doing we
explain and quantify our concerns about the results derived by Vallisneri,
Bayle, Babak ... | [
{
"created": "Sat, 19 Jun 2021 18:44:16 GMT",
"version": "v1"
}
] | 2021-08-24 | [
[
"Tinto",
"Massimo",
""
],
[
"Dhurandhar",
"Sanjeev",
""
],
[
"Joshi",
"Prasanna",
""
]
] | We address the two issues raised by Bayle, Vallisneri, Babak, and Petiteau (in their gr-qc document arXiv:2106.03976) about our matrix formulation of Time-Delay Interferometry (TDI) (arXiv:2105.02054) \cite{TDJ21}. In so doing we explain and quantify our concerns about the results derived by Vallisneri, Bayle, Babak an... |
1909.13796 | Francisco Fern\'andez-\'Alvarez | Francisco Fern\'andez-\'Alvarez and Jos\'e M. M. Senovilla | A novel characterisation of gravitational radiation in asymptotically
flat space-times | 10 pages, acknowledgments added | Phys. Rev. D 101, 024060 (2020) | 10.1103/PhysRevD.101.024060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel criterion to determine the presence of gravitational radiation
arriving to, or departing from, null infinity of any weakly
asymptotically-simple space-time with vanishing cosmological constant is given.
The quantities involved are geometric, of tidal nature, with good gauge
behaviour and univocally defined at... | [
{
"created": "Mon, 30 Sep 2019 15:48:20 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jan 2020 10:10:09 GMT",
"version": "v2"
}
] | 2020-02-04 | [
[
"Fernández-Álvarez",
"Francisco",
""
],
[
"Senovilla",
"José M. M.",
""
]
] | A novel criterion to determine the presence of gravitational radiation arriving to, or departing from, null infinity of any weakly asymptotically-simple space-time with vanishing cosmological constant is given. The quantities involved are geometric, of tidal nature, with good gauge behaviour and univocally defined at n... |
gr-qc/0412130 | Ivan L. Zhogin | I. L. Zhogin | Old and new research on the Absolute Parallelism theory | PhD thesis (with a preface and some fresh comments); published by the
Lambert publishing (LAP) ISBN 978-3-8383-8876-2; 104 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compatible equations, Singularities of solutions, Topological charges and
quasi-charges.
PhD thesis (translated frorm Russian).
The book shows the sights of Absolute Parallelism (AP), and contains useful
information on the problem of singularities, compatibility theory, homotopy
groups (also relative and k-ad), t... | [
{
"created": "Fri, 31 Dec 2004 18:22:25 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2010 15:21:58 GMT",
"version": "v2"
}
] | 2010-10-20 | [
[
"Zhogin",
"I. L.",
""
]
] | Compatible equations, Singularities of solutions, Topological charges and quasi-charges. PhD thesis (translated frorm Russian). The book shows the sights of Absolute Parallelism (AP), and contains useful information on the problem of singularities, compatibility theory, homotopy groups (also relative and k-ad), topolog... |
1810.04885 | Yu-Tong Wang | Yu-Tong Wang, Jun Zhang, Yun-Song Piao | Primordial gravastar from inflation | 10 pages, 4 figures | null | 10.1016/j.physletb.2019.06.036 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dS bubbles can nucleate spontaneously during inflation, and will be
stretched by the cosmological expansion to astrophysical scale. We report on a
novel phenomenon that such a bubble might develop into a gravastar (an
ultra-compact object with a dS core) after inflation, which witnessed the
occurrence of inflatio... | [
{
"created": "Thu, 11 Oct 2018 08:15:36 GMT",
"version": "v1"
}
] | 2019-06-26 | [
[
"Wang",
"Yu-Tong",
""
],
[
"Zhang",
"Jun",
""
],
[
"Piao",
"Yun-Song",
""
]
] | The dS bubbles can nucleate spontaneously during inflation, and will be stretched by the cosmological expansion to astrophysical scale. We report on a novel phenomenon that such a bubble might develop into a gravastar (an ultra-compact object with a dS core) after inflation, which witnessed the occurrence of inflation ... |
gr-qc/0610065 | Dimitry Leites | Yu.E. Gliklikh, P.S. Zykov | A two-point boundary value problem on a Lorentz manifold arising in A.
Poltorak's concept of reference frame | 11 pages | null | 10.2991/jnmp.2007.14.3.7 | null | gr-qc | null | In A. Poltorak's concept, the reference frame in General Relativity is a
certain manifold equipped with a connection. The question under consideration
here is whether it is possible to join two events in the space-time by a
time-like geodesic if they are joined by a geodesic of the reference frame
connection that has... | [
{
"created": "Thu, 12 Oct 2006 12:33:34 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Gliklikh",
"Yu. E.",
""
],
[
"Zykov",
"P. S.",
""
]
] | In A. Poltorak's concept, the reference frame in General Relativity is a certain manifold equipped with a connection. The question under consideration here is whether it is possible to join two events in the space-time by a time-like geodesic if they are joined by a geodesic of the reference frame connection that has a... |
2104.05644 | Cristian Erices | Cristian Erices, Pantelis Filis and Eleftherios Papantonopoulos | Hairy Black Holes in Disformal Scalar-Tensor Gravity Theories | null | Phys. Rev. D 104, 024031 (2021) | 10.1103/PhysRevD.104.024031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the no-hair theorem for scalar-tensor theories with bi-metric
structure can be evaded. We find that hairy black hole solutions in the
presence of an electric charge admit AdS, flat or dS asymptotics with
spherical, flat, or hyperbolic base manifolds. Spherically symmetric,
asymptotically flat black holes... | [
{
"created": "Mon, 12 Apr 2021 17:10:23 GMT",
"version": "v1"
},
{
"created": "Sun, 16 May 2021 21:51:19 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Erices",
"Cristian",
""
],
[
"Filis",
"Pantelis",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We show that the no-hair theorem for scalar-tensor theories with bi-metric structure can be evaded. We find that hairy black hole solutions in the presence of an electric charge admit AdS, flat or dS asymptotics with spherical, flat, or hyperbolic base manifolds. Spherically symmetric, asymptotically flat black holes a... |
1808.06582 | Vojtech Witzany | Vojt\v{e}ch Witzany, Jan Steinhoff, and Georgios Lukes-Gerakopoulos | Hamiltonians and canonical coordinates for spinning particles in curved
space-time | 37 pages, 2 figures. Accepted at CQG | 2019 Class. Quantum Grav. 36 075003 | 10.1088/1361-6382/ab002f | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spin-curvature coupling as captured by the so-called
Mathisson-Papapetrou-Dixon (MPD) equations is the leading order effect of the
finite size of a rapidly rotating compact astrophysical object moving in a
curved background. It is also a next-to-leading order effect in the phase of
gravitational waves emitted by ... | [
{
"created": "Mon, 20 Aug 2018 17:42:00 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jan 2019 12:18:16 GMT",
"version": "v2"
}
] | 2019-03-01 | [
[
"Witzany",
"Vojtěch",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
]
] | The spin-curvature coupling as captured by the so-called Mathisson-Papapetrou-Dixon (MPD) equations is the leading order effect of the finite size of a rapidly rotating compact astrophysical object moving in a curved background. It is also a next-to-leading order effect in the phase of gravitational waves emitted by ex... |
2001.00599 | Mostafizur Rahman | Mostafizur Rahman, Soumodeep Mitra and Sumanta Chakraborty | Strong cosmic censorship conjecture with NUT charge and conformal
coupling | v2, minor revision, 47 pages, 4 figures, published in Class. Quant.
Grav | Class. Quantum Grav. 37, 195004 (2020) | 10.1088/1361-6382/aba17d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong cosmic censorship conjecture is central to the deterministic nature of
general relativity, since it asserts that given any generic initial data on a
spacelike hypersurface, the future can be uniquely predicted. However, recently
it has been found that for charged black holes in asymptotically de Sitter
spaceti... | [
{
"created": "Thu, 2 Jan 2020 19:16:32 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2020 09:14:34 GMT",
"version": "v2"
}
] | 2020-09-22 | [
[
"Rahman",
"Mostafizur",
""
],
[
"Mitra",
"Soumodeep",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | Strong cosmic censorship conjecture is central to the deterministic nature of general relativity, since it asserts that given any generic initial data on a spacelike hypersurface, the future can be uniquely predicted. However, recently it has been found that for charged black holes in asymptotically de Sitter spacetime... |
gr-qc/9703086 | 3 | Donald E. Neville | Total intrinsic spin for plane gravity waves | 14 pages; LaTex | Phys.Rev.D56:3485-3489,1997 | 10.1103/PhysRevD.56.3485 | TU-328-97 | gr-qc | null | A quantity which measures total intrinsic spin along the z axis is
constructed for planar gravity (fields dependent on z and t only), in both the
Ashtekar complex connection formalism and in geometrodynamics. The total spin
is conserved but (surprisingly) is not a surface term. This constant of the
motion coincides w... | [
{
"created": "Fri, 28 Mar 1997 18:52:12 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Neville",
"Donald E.",
""
]
] | A quantity which measures total intrinsic spin along the z axis is constructed for planar gravity (fields dependent on z and t only), in both the Ashtekar complex connection formalism and in geometrodynamics. The total spin is conserved but (surprisingly) is not a surface term. This constant of the motion coincides wit... |
1208.2934 | Maciej Maliborski | Maciej Maliborski | Instability of Flat Space Enclosed in a Cavity | 4 pages, 7 figures; Revised version, consistent with published paper | Phys. Rev. Lett. 109, 221101 (2012) | 10.1103/PhysRevLett.109.221101 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a spherically symmetric self-gravitating massless scalar field
enclosed inside a timelike worldtube $R\times S^3$ with a perfectly reflecting
wall. Numerical evidence is given that arbitrarily small generic initial data
evolve into a black hole.
| [
{
"created": "Tue, 14 Aug 2012 17:59:48 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jan 2013 17:11:44 GMT",
"version": "v2"
}
] | 2013-01-22 | [
[
"Maliborski",
"Maciej",
""
]
] | We consider a spherically symmetric self-gravitating massless scalar field enclosed inside a timelike worldtube $R\times S^3$ with a perfectly reflecting wall. Numerical evidence is given that arbitrarily small generic initial data evolve into a black hole. |
1209.0213 | Sergio Dain | Sergio Dain and Gustavo Dotti | The wave equation on the extreme Reissner-Nordstr\"om black hole | Minor corrections | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the scalar wave equation on the open exterior region of an extreme
Reissner-Nordstr\"om black hole and prove that, given compactly supported data
on a Cauchy surface orthogonal to the timelike Killing vector field, the
solution, together with its $(t,s,\theta,\phi)$ derivatives of arbitrary order,
$s$ a tort... | [
{
"created": "Sun, 2 Sep 2012 20:48:27 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2012 22:41:40 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Oct 2012 18:14:55 GMT",
"version": "v3"
},
{
"created": "Fri, 1 Feb 2013 14:12:09 GMT",
"version": "v4"
}
] | 2013-02-04 | [
[
"Dain",
"Sergio",
""
],
[
"Dotti",
"Gustavo",
""
]
] | We study the scalar wave equation on the open exterior region of an extreme Reissner-Nordstr\"om black hole and prove that, given compactly supported data on a Cauchy surface orthogonal to the timelike Killing vector field, the solution, together with its $(t,s,\theta,\phi)$ derivatives of arbitrary order, $s$ a tortoi... |
1909.11661 | S. I. Kruglov | S. I. Kruglov | Dyonic black holes in framework of Born--Infeld-type electrodynamics | 17 pages, 6 figures | Gen.Rel.Grav. 51 (2019) no.9, 121 | 10.1007/s10714-019-2603-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dyonic black hole solutions with spherically symmetric configurations within
general relativity are investigated where the source of the gravitational field
is Born - Infeld-type electrodynamics. Corrections to Coulomb's law and
Reissner - Nordstrom solutions are obtained. From principles of causality and
unitarity w... | [
{
"created": "Wed, 25 Sep 2019 14:55:30 GMT",
"version": "v1"
}
] | 2019-09-30 | [
[
"Kruglov",
"S. I.",
""
]
] | Dyonic black hole solutions with spherically symmetric configurations within general relativity are investigated where the source of the gravitational field is Born - Infeld-type electrodynamics. Corrections to Coulomb's law and Reissner - Nordstrom solutions are obtained. From principles of causality and unitarity we ... |
2311.13268 | Ignazio Ciufolini | Ignazio Ciufolini, Claudio Paris, Erricos C. Pavlis, John Ries,
Richard Matzner, Antonio Paolozzi, Emiliano Ortore, Giuseppe Bianco,
Magdalena Kuzmicz-Cieslak, Vahe Gurzadyan, Roger Penrose | First results of the LARES 2 space experiment to test the general theory
of relativity | 11 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | The LAGEOS 3 (today LARES 2) space experiment was proposed in the eighties by
the Physics Department and by the Center of Space Research (CSR) of the
University of Texas (UT) at Austin and by the Italian Space Agency (ASI) to
test and accurately measure frame-dragging, with the strong support of John
Archibald Wheele... | [
{
"created": "Wed, 22 Nov 2023 09:38:49 GMT",
"version": "v1"
}
] | 2023-11-23 | [
[
"Ciufolini",
"Ignazio",
""
],
[
"Paris",
"Claudio",
""
],
[
"Pavlis",
"Erricos C.",
""
],
[
"Ries",
"John",
""
],
[
"Matzner",
"Richard",
""
],
[
"Paolozzi",
"Antonio",
""
],
[
"Ortore",
"Emiliano",
""
],... | The LAGEOS 3 (today LARES 2) space experiment was proposed in the eighties by the Physics Department and by the Center of Space Research (CSR) of the University of Texas (UT) at Austin and by the Italian Space Agency (ASI) to test and accurately measure frame-dragging, with the strong support of John Archibald Wheeler,... |
1509.01878 | Erik Curiel | Erik Curiel | Measure, Topology and Probabilistic Reasoning in Cosmology | 26 pages | null | null | null | gr-qc math-ph math.MP physics.data-an physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I explain the difficulty of making various concepts of and relating to
probability precise, rigorous and physically significant when attempting to
apply them in reasoning about objects (e.g., spacetimes) living in
infinite-dimensional spaces, working through many examples from cosmology. I
focus on the relation of to... | [
{
"created": "Mon, 7 Sep 2015 01:22:29 GMT",
"version": "v1"
}
] | 2015-09-08 | [
[
"Curiel",
"Erik",
""
]
] | I explain the difficulty of making various concepts of and relating to probability precise, rigorous and physically significant when attempting to apply them in reasoning about objects (e.g., spacetimes) living in infinite-dimensional spaces, working through many examples from cosmology. I focus on the relation of topo... |
1508.05375 | Yurii Ignat'ev | Yurii Ignat'ev | Instability Model of the Universe with De Sitter Beginning | 13 pages, 5 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The physical instability of the Universe model with de Sitter beginning is
proved in this article. 1. It is shown that even a small addition of
ultrarelativistic matter turns the de Sitter Universe into the Universe with
finite past. 2. Constant solution of equation of model with constant scalar
field is shown to be ... | [
{
"created": "Fri, 21 Aug 2015 19:25:41 GMT",
"version": "v1"
}
] | 2015-08-24 | [
[
"Ignat'ev",
"Yurii",
""
]
] | The physical instability of the Universe model with de Sitter beginning is proved in this article. 1. It is shown that even a small addition of ultrarelativistic matter turns the de Sitter Universe into the Universe with finite past. 2. Constant solution of equation of model with constant scalar field is shown to be in... |
gr-qc/9712015 | Jeeva S. Anandan | Jeeva S. Anandan | Classical and Quantum Physical Geometry | 31 pages, tex, 1 figure. Published in Potentiality, Entanglement and
Passion-at-a-distance - Quantum Mechanical Studies for Abner Shimony, vol. 2,
edited by R. S. Cohen, M. Horne and J. Stachel, (Kluwer, Dordrecht, Holland
1997), p. 31-52 | null | null | null | gr-qc hep-th | null | The task of quantizing gravity is compared with Einstein's relativization of
gravity. The philosophical and physical foundations of general relativity are
briefly reviewed. The Ehlers-Pirani-Schild scheme of operationally determining
the geometry of space-time, using freely falling classical particle
trajectories, is... | [
{
"created": "Tue, 2 Dec 1997 21:49:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anandan",
"Jeeva S.",
""
]
] | The task of quantizing gravity is compared with Einstein's relativization of gravity. The philosophical and physical foundations of general relativity are briefly reviewed. The Ehlers-Pirani-Schild scheme of operationally determining the geometry of space-time, using freely falling classical particle trajectories, is d... |
gr-qc/0101067 | Pinto Innocenzo M. | R.P. Croce, Th. Demma, V. Pierro, I.M. Pinto | Tanaka-Tagoshi Parametrization of post-1PN Spin-Free Gravitational Wave
Chirps: Equispaced and Cardinal Interpolated Lattices For First Generation
Interferometric Antennas | 9 pages, 8 figures, 3 tables, accepted for publication in Phys. Rev.
D | Phys.Rev.D64:042005,2001 | 10.1103/PhysRevD.64.042005 | null | gr-qc | null | The spin-free binary-inspiral parameter-space introduced by Tanaka and
Tagoshi to construct a uniformly-spaced lattice of templates at (and possibly
beyond) $2.5PN$ order is shown to work for all first generation interferometric
gravitational wave antennas. This allows to extend the minimum-redundant
cardinal interpo... | [
{
"created": "Wed, 17 Jan 2001 11:12:21 GMT",
"version": "v1"
},
{
"created": "Fri, 11 May 2001 14:10:08 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Jun 2001 20:51:30 GMT",
"version": "v3"
}
] | 2011-04-12 | [
[
"Croce",
"R. P.",
""
],
[
"Demma",
"Th.",
""
],
[
"Pierro",
"V.",
""
],
[
"Pinto",
"I. M.",
""
]
] | The spin-free binary-inspiral parameter-space introduced by Tanaka and Tagoshi to construct a uniformly-spaced lattice of templates at (and possibly beyond) $2.5PN$ order is shown to work for all first generation interferometric gravitational wave antennas. This allows to extend the minimum-redundant cardinal interpola... |
2311.03423 | Dr. Goutam Manna | Bivash Majumder, Maxim Khlopov, Saibal Ray and Goutam Manna | Geodesic structure of generalized Vaidya spacetime through the K-essence | 19 pages, 21 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This article investigates on the radial and non-radial geodesic structures of
the generalized K-essence Vaidya spacetime. Within the framework of K-essence
geometry, it is important to note that the metric does not possess conformal
equivalence to the conventional gravitational metric. This study employs a
non-canoni... | [
{
"created": "Mon, 6 Nov 2023 16:22:09 GMT",
"version": "v1"
}
] | 2023-11-08 | [
[
"Majumder",
"Bivash",
""
],
[
"Khlopov",
"Maxim",
""
],
[
"Ray",
"Saibal",
""
],
[
"Manna",
"Goutam",
""
]
] | This article investigates on the radial and non-radial geodesic structures of the generalized K-essence Vaidya spacetime. Within the framework of K-essence geometry, it is important to note that the metric does not possess conformal equivalence to the conventional gravitational metric. This study employs a non-canonica... |
gr-qc/9405008 | null | Peter Dunsby and Marco Bruni | Conserved Quantities in Perturbed Inflationary Universes | 17 Pages, LaTeX | Int.J.Mod.Phys.D3:443-459,1994 | 10.1142/S0218271894000629 | UCT Preprint 94/5 | gr-qc | null | Given that observations seem to favour a \index{density parameter}
$\Omega_0<1$, corresponding to an open universe, we consider gauge\hs invariant
perturbations of non\hs flat Robertson\hs Walker universes filled with a
general imperfect fluid which can also be taken to represent a scalar field.
Our aim is to set up ... | [
{
"created": "Wed, 4 May 1994 16:11:16 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Dunsby",
"Peter",
""
],
[
"Bruni",
"Marco",
""
]
] | Given that observations seem to favour a \index{density parameter} $\Omega_0<1$, corresponding to an open universe, we consider gauge\hs invariant perturbations of non\hs flat Robertson\hs Walker universes filled with a general imperfect fluid which can also be taken to represent a scalar field. Our aim is to set up th... |
2203.10868 | Ya-Peng Hu | Haximjan Abdusattar, Shi-Bei Kong, Yihao Yin and Ya-Peng Hu | The Hawking-Page-like Phase Transition from FRW Spacetime to McVittie
Black Hole | 12 pages, 4 figures | null | 10.1088/1475-7516/2022/08/060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamics especially the
Hawking-Page-like phase transition of the McVittie space-time. We formulate the
first law of thermodynamics for the McVittie black hole, and find that the work
density $W$ of the perfect fluid plays the role of the thermodynamic pressure,
i.e. $P$:=$-W$.... | [
{
"created": "Mon, 21 Mar 2022 10:41:59 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Abdusattar",
"Haximjan",
""
],
[
"Kong",
"Shi-Bei",
""
],
[
"Yin",
"Yihao",
""
],
[
"Hu",
"Ya-Peng",
""
]
] | In this paper, we investigate the thermodynamics especially the Hawking-Page-like phase transition of the McVittie space-time. We formulate the first law of thermodynamics for the McVittie black hole, and find that the work density $W$ of the perfect fluid plays the role of the thermodynamic pressure, i.e. $P$:=$-W$. W... |
2102.03221 | Po-Ning Chen | Po-Ning Chen, Jordan Keller, Mu-Tao Wang, Ye-Kai Wang, and Shing-Tung
Yau | Evolution of angular momentum and center of mass at null infinity | 40 pages, references added and typos corrected | null | 10.1007/s00220-021-04053-7 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how conserved quantities such as angular momentum and center of mass
evolve with respect to the retarded time at null infinity, which is described
in terms of a Bondi-Sachs coordinate system. These evolution formulae
complement the classical Bondi mass loss formula for gravitational radiation.
They are furth... | [
{
"created": "Fri, 5 Feb 2021 15:12:23 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Feb 2021 20:14:34 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Chen",
"Po-Ning",
""
],
[
"Keller",
"Jordan",
""
],
[
"Wang",
"Mu-Tao",
""
],
[
"Wang",
"Ye-Kai",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We study how conserved quantities such as angular momentum and center of mass evolve with respect to the retarded time at null infinity, which is described in terms of a Bondi-Sachs coordinate system. These evolution formulae complement the classical Bondi mass loss formula for gravitational radiation. They are further... |
1901.05902 | Halston Lim | Halston Lim, Gaurav Khanna, Anuj Apte, and Scott A. Hughes | Exciting black hole modes via misaligned coalescences: II. The mode
content of late-time coalescence waveforms | 21 pages, 20 figures. This update matches text in published version | Phys. Rev. D 100, 084032 (2019) | 10.1103/PhysRevD.100.084032 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using inspiral and plunge trajectories we construct with a generalized
Ori-Thorne algorithm, we use a time-domain black hole perturbation theory code
to compute the corresponding gravitational waves. The last cycles of these
waveforms are a superposition of Kerr quasinormal modes. In this paper, we
examine how the mo... | [
{
"created": "Thu, 17 Jan 2019 17:04:19 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Nov 2019 16:52:12 GMT",
"version": "v2"
}
] | 2019-11-18 | [
[
"Lim",
"Halston",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Apte",
"Anuj",
""
],
[
"Hughes",
"Scott A.",
""
]
] | Using inspiral and plunge trajectories we construct with a generalized Ori-Thorne algorithm, we use a time-domain black hole perturbation theory code to compute the corresponding gravitational waves. The last cycles of these waveforms are a superposition of Kerr quasinormal modes. In this paper, we examine how the mode... |
2301.12133 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko, Shahab Shahidi | The first variation of the matter energy-momentum tensor with respect to
the metric, and its implications on modified gravity theories | 9 pages, 4 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first order variation of the matter energy-momentum tensor $T_{\mu \nu}$
with respect to the metric tensor $g^{\alpha \beta}$ plays an important role in
modified gravity theories with geometry-matter coupling, and in particular in
the $f(R,T)$ modified gravity theory. We obtain the expression of the variation
$\d... | [
{
"created": "Sat, 28 Jan 2023 09:03:21 GMT",
"version": "v1"
},
{
"created": "Sun, 14 May 2023 12:01:59 GMT",
"version": "v2"
}
] | 2023-05-16 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Shahidi",
"Shahab",
""
]
] | The first order variation of the matter energy-momentum tensor $T_{\mu \nu}$ with respect to the metric tensor $g^{\alpha \beta}$ plays an important role in modified gravity theories with geometry-matter coupling, and in particular in the $f(R,T)$ modified gravity theory. We obtain the expression of the variation $\del... |
1911.02892 | Elena V. Arbuzova | Elena Arbuzova | Instabilities in modified theories of gravity | 21 pages, 6 figures. Talk presented at the conference "Multifrequency
Behaviour of High Energy Cosmic Sources - XIII - MULTIF2019", 3-8 June 2019,
Palermo, Italy | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The review is devoted to consideration of possible observational consequences
of modified gravity theories, suggested for explanation of the contemporary
accelerated expansion of the universe. The major attention is paid to
F(R)-models. It is shown that in systems with rising energy density high
frequency and large a... | [
{
"created": "Thu, 7 Nov 2019 13:27:59 GMT",
"version": "v1"
}
] | 2019-11-11 | [
[
"Arbuzova",
"Elena",
""
]
] | The review is devoted to consideration of possible observational consequences of modified gravity theories, suggested for explanation of the contemporary accelerated expansion of the universe. The major attention is paid to F(R)-models. It is shown that in systems with rising energy density high frequency and large amp... |
1403.0083 | Yu-Xiao Liu | Xiao-Long Du, Ke Yang, Xin-He Meng, Yu-Xiao Liu | Large Scale Structure Formation in Eddington-inspired Born-Infeld
Gravity | 11 pages, 3 figures, improved version to be published in Phys. Rev. D | Phys. Rev. D 90, 044054 (2014) | 10.1103/PhysRevD.90.044054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the large scale structure formation in Eddington-inspired
Born-Infeld (EiBI) gravity. It is found that the linear growth of scalar
perturbations in EiBI gravity deviates from that in general relativity for
modes with large wave numbers ($k$), but the deviation is largely suppressed
with the expansion of the ... | [
{
"created": "Sat, 1 Mar 2014 13:28:47 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 14:06:24 GMT",
"version": "v2"
}
] | 2014-09-23 | [
[
"Du",
"Xiao-Long",
""
],
[
"Yang",
"Ke",
""
],
[
"Meng",
"Xin-He",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | We study the large scale structure formation in Eddington-inspired Born-Infeld (EiBI) gravity. It is found that the linear growth of scalar perturbations in EiBI gravity deviates from that in general relativity for modes with large wave numbers ($k$), but the deviation is largely suppressed with the expansion of the Un... |
0708.2488 | Rickard Jonsson | Rickard Jonsson | An intuitive approach to inertial forces and the centrifugal force
paradox in general relativity | 14 pages, 21 figures | Am.J.Phys.74:905-916,2006 | 10.1119/1.2198880 | null | gr-qc | null | As the velocity of a rocket in a circular orbit near a black hole increases,
the outwardly directed rocket thrust must increase to keep the rocket in its
orbit. This feature might appear paradoxical from a Newtonian viewpoint, but we
show that it follows naturally from the equivalence principle together with
special ... | [
{
"created": "Sat, 18 Aug 2007 14:01:47 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Jonsson",
"Rickard",
""
]
] | As the velocity of a rocket in a circular orbit near a black hole increases, the outwardly directed rocket thrust must increase to keep the rocket in its orbit. This feature might appear paradoxical from a Newtonian viewpoint, but we show that it follows naturally from the equivalence principle together with special re... |
2109.01660 | Jos\'e Pedro Pinto Vieira | J. P. P. Vieira | The Universe as a driven quantum system: Unbounded heating in cyclic
cosmologies | null | null | null | null | gr-qc astro-ph.CO cond-mat.stat-mech quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian of an evolving Universe is shown to be formally equivalent to
that of a driven quantum system, whose driving follows from the temporal
dependence of the spacetime metric. This analogy allows insights from the field
of driven quantum systems to be applied to cosmological settings. In
particular, it is ... | [
{
"created": "Thu, 2 Sep 2021 15:29:37 GMT",
"version": "v1"
}
] | 2021-09-07 | [
[
"Vieira",
"J. P. P.",
""
]
] | The Hamiltonian of an evolving Universe is shown to be formally equivalent to that of a driven quantum system, whose driving follows from the temporal dependence of the spacetime metric. This analogy allows insights from the field of driven quantum systems to be applied to cosmological settings. In particular, it is sh... |
2301.08646 | Alice Boldrin | Alice Boldrin | The Gauge issue and the Hamiltonian theory of cosmological perturbations | Presented at the 8th Conference of the Polish Society on Relativity | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a general formalism for the Hamiltonian description of
perturbation theory around any spatially homogeneous spacetime. We employ and
refine the Dirac method for constrained systems, which is very well-suited to
cosmological perturbations. This approach includes a discussion of the
gauge-invariant dynamics ... | [
{
"created": "Fri, 20 Jan 2023 15:51:47 GMT",
"version": "v1"
}
] | 2023-01-23 | [
[
"Boldrin",
"Alice",
""
]
] | We present a general formalism for the Hamiltonian description of perturbation theory around any spatially homogeneous spacetime. We employ and refine the Dirac method for constrained systems, which is very well-suited to cosmological perturbations. This approach includes a discussion of the gauge-invariant dynamics of... |
1505.02882 | George Pappas Dr | George Pappas and Thomas P. Sotiriou | Geodesic properties in terms of multipole moments in scalar-tensor
theories of gravity | 16 pages | MNRAS 453, 2862-2876 (2015) | 10.1093/mnras/stv1819 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formalism for describing a metric and the corresponding scalar in terms
of multipole moments has recently been developed for scalar-tensor theories. We
take advantage of this formalism in order to obtain expressions for the
observables that characterise geodesics in terms of the moments. These
expressions provide... | [
{
"created": "Tue, 12 May 2015 06:16:08 GMT",
"version": "v1"
}
] | 2015-09-07 | [
[
"Pappas",
"George",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | The formalism for describing a metric and the corresponding scalar in terms of multipole moments has recently been developed for scalar-tensor theories. We take advantage of this formalism in order to obtain expressions for the observables that characterise geodesics in terms of the moments. These expressions provide s... |
1311.0087 | Sourav Bhattacharya | Sourav Bhattacharya and Hideki Maeda | Can a black hole with conformal scalar hair rotate? | v3, 4pp; added references and discussions, modifications in
presentation and the interpretation of the result; accepted in Phys. Rev. D
as brief report | Phys. Rev. D 89, 087501 (2014) | 10.1103/PhysRevD.89.087501 | RUP-13-14, CECS-PHY-13/08 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that, under the separability assumption for the metric, the
slow-rotation approximation for the Bocharova-Bronnikov-Melnikov-Bekenstein
black hole in general relativity with a conformally coupled scalar field does
not work outside the event horizon. Suggestions indicated by our present
analysis towards a ... | [
{
"created": "Fri, 1 Nov 2013 04:43:06 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Nov 2013 10:13:50 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Mar 2014 05:45:21 GMT",
"version": "v3"
}
] | 2014-04-23 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Maeda",
"Hideki",
""
]
] | It is shown that, under the separability assumption for the metric, the slow-rotation approximation for the Bocharova-Bronnikov-Melnikov-Bekenstein black hole in general relativity with a conformally coupled scalar field does not work outside the event horizon. Suggestions indicated by our present analysis towards a fu... |
2207.13531 | Angela Borchers | Angela Borchers, Frank Ohme | Inconsistent black hole kick estimates from gravitational-wave models | 31 pages, 17 figures | Class. Quantum Grav. 40 095008 (2023) | 10.1088/1361-6382/acc5da | LIGO-P2200225 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The accuracy of gravitational-wave models of compact binaries has
traditionally been addressed by the mismatch between the model and
numerical-relativity simulations. This is a measure of the overall agreement
between the two waveforms. However, the largest modelling error typically
appears in the strong-field merger... | [
{
"created": "Wed, 27 Jul 2022 14:03:29 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2022 15:27:09 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Apr 2023 12:25:49 GMT",
"version": "v3"
}
] | 2023-04-25 | [
[
"Borchers",
"Angela",
""
],
[
"Ohme",
"Frank",
""
]
] | The accuracy of gravitational-wave models of compact binaries has traditionally been addressed by the mismatch between the model and numerical-relativity simulations. This is a measure of the overall agreement between the two waveforms. However, the largest modelling error typically appears in the strong-field merger r... |
gr-qc/9808078 | Sheng Li | Sheng Li and Yishi Duan | The Bifurcation of the Topological Structure in the Sunspot's Electric
Topological Current with Locally Gauge-invariant Maxwell-Chern-Simons Term | 13 page, revtex | Astrophys.Space Sci. 268 (1999) 455-468 | 10.1023/A:1002083106965 | null | gr-qc | null | The topological structure of the electric topological current of the locally
gauge invariant Maxwell-Chern-Simons Model and its bifurcation is studied. The
electric topological charge is quantized in term of winding number. The Hopf
indices and Brouwer degree labeled the local topological structure of the
electric to... | [
{
"created": "Fri, 28 Aug 1998 03:20:00 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 1998 06:15:11 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Li",
"Sheng",
""
],
[
"Duan",
"Yishi",
""
]
] | The topological structure of the electric topological current of the locally gauge invariant Maxwell-Chern-Simons Model and its bifurcation is studied. The electric topological charge is quantized in term of winding number. The Hopf indices and Brouwer degree labeled the local topological structure of the electric topo... |
2112.13701 | Branislav Cvetkovi\'c | Branislav Cvetkovi\'c and Dejan Simi\'c | Memory effect of the pp waves with torsion | LaTeX, 12 pages, 6 figures. arXiv admin note: substantial text
overlap with arXiv:1702.04367; v2 minor revisions | Eur. Phys. J. C (2022) 82:127 | 10.1140/epjc/s10052-022-10081-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the motion of test particles in the spacetime of the plane-fronted
(pp) waves with torsion in four-dimensions. We conclude that there is a
velocity memory effect in the direction of advanced time and along radial
direction, while we have rotation of particles in angular direction. The
velocity memory effec... | [
{
"created": "Thu, 23 Dec 2021 15:16:33 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2022 20:44:18 GMT",
"version": "v2"
}
] | 2022-02-23 | [
[
"Cvetković",
"Branislav",
""
],
[
"Simić",
"Dejan",
""
]
] | We analyze the motion of test particles in the spacetime of the plane-fronted (pp) waves with torsion in four-dimensions. We conclude that there is a velocity memory effect in the direction of advanced time and along radial direction, while we have rotation of particles in angular direction. The velocity memory effect ... |
1106.1103 | Andreas Thurn | Norbert Bodendorfer, Thomas Thiemann, Andreas Thurn | Towards Loop Quantum Supergravity (LQSG) | 9 pages. v2: minor improvements in presentation, virtually identical
to published version | Phys. Lett. B 711: 205-211 (2012) | 10.1016/j.physletb.2012.04.003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Should nature be supersymmetric, then it will be described by Quantum
Supergravity at least in some energy regimes. The currently most advanced
description of Quantum Supergravity and beyond is Superstring Theory/M-Theory
in 10/11 dimensions. String Theory is a top-to-bottom approach to Quantum
Supergravity in that i... | [
{
"created": "Mon, 6 Jun 2011 15:57:19 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jun 2012 07:45:59 GMT",
"version": "v2"
}
] | 2012-06-13 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Thiemann",
"Thomas",
""
],
[
"Thurn",
"Andreas",
""
]
] | Should nature be supersymmetric, then it will be described by Quantum Supergravity at least in some energy regimes. The currently most advanced description of Quantum Supergravity and beyond is Superstring Theory/M-Theory in 10/11 dimensions. String Theory is a top-to-bottom approach to Quantum Supergravity in that it ... |
gr-qc/0411068 | Miguel Lorente | M. Lorente | Discrete quantum gravity: the Lorentz invariant weight for the
Barrett-Crane model | LaTex, 6 pages. Communication presented to the XXV international
Colloquium on Group Theoretical Methods in Physics, Cocoyoc, Mexico August
2004. To be published by IOP Publishers | null | null | null | gr-qc | null | In a recent paper [1] we have constructed the spin and tensor representations
of SO(4) from which the invariant weight can be derived for the Barrett-Crane
model in quantum gravity. By analogy with the SO(4) group, we present the
complexified Clebsch-Gordan coefficients in order to construct the
Biedenharn-Dolginov f... | [
{
"created": "Sun, 14 Nov 2004 22:41:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lorente",
"M.",
""
]
] | In a recent paper [1] we have constructed the spin and tensor representations of SO(4) from which the invariant weight can be derived for the Barrett-Crane model in quantum gravity. By analogy with the SO(4) group, we present the complexified Clebsch-Gordan coefficients in order to construct the Biedenharn-Dolginov fun... |
1707.06079 | Martin Taylor | Hans Lindblad, Martin Taylor | Global stability of Minkowski space for the Einstein--Vlasov system in
the harmonic gauge | null | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Minkowski space is shown to be globally stable as a solution to the massive
Einstein--Vlasov system. The proof is based on a harmonic gauge in which the
equations reduce to a system of quasilinear wave equations for the metric,
satisfying the weak null condition, coupled to a transport equation for the
Vlasov particl... | [
{
"created": "Wed, 19 Jul 2017 13:29:37 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Nov 2017 17:54:34 GMT",
"version": "v2"
}
] | 2017-11-07 | [
[
"Lindblad",
"Hans",
""
],
[
"Taylor",
"Martin",
""
]
] | Minkowski space is shown to be globally stable as a solution to the massive Einstein--Vlasov system. The proof is based on a harmonic gauge in which the equations reduce to a system of quasilinear wave equations for the metric, satisfying the weak null condition, coupled to a transport equation for the Vlasov particle ... |
0906.3680 | Zhao Ren | Li Huaifan, Zhang Shengli, Wu Yueqin, Zhang Lichun and Zhao Ren | Hawking radiation of Kerr-Newman-de Sitter black hole | 8 pages | Eur.Phys.J.C63:133-138,2009 | 10.1140/epjc/s10052-009-1085-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the classical Damour-Ruffini method and discuss Hawking radiation
in Kerr-Newman-de Sitter(KNdS) black hole. Under the condition that the total
energy, angular momentum and charge of spacetime are conserved, taking the
reaction of the radiation of the particle to the spacetime and the relation
between the b... | [
{
"created": "Fri, 19 Jun 2009 14:21:27 GMT",
"version": "v1"
}
] | 2010-02-22 | [
[
"Huaifan",
"Li",
""
],
[
"Shengli",
"Zhang",
""
],
[
"Yueqin",
"Wu",
""
],
[
"Lichun",
"Zhang",
""
],
[
"Ren",
"Zhao",
""
]
] | We extend the classical Damour-Ruffini method and discuss Hawking radiation in Kerr-Newman-de Sitter(KNdS) black hole. Under the condition that the total energy, angular momentum and charge of spacetime are conserved, taking the reaction of the radiation of the particle to the spacetime and the relation between the bla... |
1503.05147 | Alexey Toporensky | A.V. Toporensky and S.B. Popov (Sternberg Astronomical Institute,
Russia) | Cosmological redshift, recession velocities and acceleration measures in
FRW cosmologies | 24 pages with 10 eps figures and 1 table, typos corrected, matches
published version | Astron. and Astrophys. Trans. v. 29, pp. 65 - 88 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this methodological note we discuss several topics related to
interpretation of some basic cosmological principles. We demonstrate that one
of the key points is the usage of synchronous reference frames. The
Friedmann-Robertson-Walker one is the most known example of them. We describe
how different quantities beha... | [
{
"created": "Tue, 17 Mar 2015 18:14:45 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Nov 2015 11:27:01 GMT",
"version": "v2"
}
] | 2015-11-20 | [
[
"Toporensky",
"A. V.",
"",
"Sternberg Astronomical Institute,\n Russia"
],
[
"Popov",
"S. B.",
"",
"Sternberg Astronomical Institute,\n Russia"
]
] | In this methodological note we discuss several topics related to interpretation of some basic cosmological principles. We demonstrate that one of the key points is the usage of synchronous reference frames. The Friedmann-Robertson-Walker one is the most known example of them. We describe how different quantities behave... |
2010.05173 | Shambel Sahlu Akalu | Shambel Sahlu, Heba Sami, Anna-Mia Swart and Thato Tsabone, Maye
Elmardi and Amare Abebe | Perturbations in a Chaplygin gas Cosmology | SAIP2019 Proceedings, SA Institute of Physics 6 pages, 7 figures | SAIP2019 Proceedings, | null | ISBN: 978-0-620-88875-2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the perturbations of a cosmic multi-fluid medium
consisting of radiation, dust and a Chaplygin gas. To do so, we follow the 1 +
3 covariant formalism and derive the evolution equations of the fluctuations in
the energy density for each species of fluid in the multi-fluid system. The
solutions t... | [
{
"created": "Sun, 11 Oct 2020 05:55:33 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Oct 2020 19:11:33 GMT",
"version": "v2"
}
] | 2020-10-27 | [
[
"Sahlu",
"Shambel",
""
],
[
"Sami",
"Heba",
""
],
[
"Swart",
"Anna-Mia",
""
],
[
"Tsabone",
"Thato",
""
],
[
"Elmardi",
"Maye",
""
],
[
"Abebe",
"Amare",
""
]
] | In this paper we study the perturbations of a cosmic multi-fluid medium consisting of radiation, dust and a Chaplygin gas. To do so, we follow the 1 + 3 covariant formalism and derive the evolution equations of the fluctuations in the energy density for each species of fluid in the multi-fluid system. The solutions to ... |
gr-qc/0202013 | Choquet-Bruhat | Yvonne Choquet-Bruhat and James W. York | Constraints and evolution in cosmology | To appear in the proceedings of the first Aegean summer school in
General Relativity, S. Cotsakis ed. Springer Lecture Notes in Physics | Lect.Notes Phys. 592 (2002) 29-58 | null | null | gr-qc | null | We review some old and new results about strict and non strict hyperbolic
formulations of the Einstein equations.
| [
{
"created": "Tue, 5 Feb 2002 19:41:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"York",
"James W.",
""
]
] | We review some old and new results about strict and non strict hyperbolic formulations of the Einstein equations. |
1607.03394 | Maxim Eingorn | Maxim Eingorn, Claus Kiefer, Alexander Zhuk | Scalar and vector perturbations in a universe with discrete and
continuous matter sources | 17 pages, no figures | JCAP 09 (2016) 032 | 10.1088/1475-7516/2016/09/032 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a universe filled with dust-like matter in the form of discrete
inhomogeneities (e.g., galaxies and their groups and clusters) and two sets of
perfect fluids with linear and nonlinear equations of state, respectively. The
background spacetime geometry is defined by the FLRW metric. In the weak
gravitational ... | [
{
"created": "Tue, 5 Jul 2016 17:38:26 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 2016 21:33:29 GMT",
"version": "v2"
}
] | 2016-09-21 | [
[
"Eingorn",
"Maxim",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We study a universe filled with dust-like matter in the form of discrete inhomogeneities (e.g., galaxies and their groups and clusters) and two sets of perfect fluids with linear and nonlinear equations of state, respectively. The background spacetime geometry is defined by the FLRW metric. In the weak gravitational fi... |
2002.10833 | Javier Relancio | J.J. Relancio, S. Liberati | Phenomenological consequences of a geometry in the cotangent bundle | 19 pages, 3 figures | Phys. Rev. D 101, 064062 (2020) | 10.1103/PhysRevD.101.064062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A deformed relativistic kinematics can be understood within a geometrical
framework through a maximally symmetric momentum space. However, when
considering this kind of approach, usually one works in a flat spacetime and in
a curved momentum space. In this paper, we will discuss a possible
generalization to take into... | [
{
"created": "Tue, 25 Feb 2020 12:45:19 GMT",
"version": "v1"
}
] | 2020-04-01 | [
[
"Relancio",
"J. J.",
""
],
[
"Liberati",
"S.",
""
]
] | A deformed relativistic kinematics can be understood within a geometrical framework through a maximally symmetric momentum space. However, when considering this kind of approach, usually one works in a flat spacetime and in a curved momentum space. In this paper, we will discuss a possible generalization to take into a... |
gr-qc/0409060 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev | Pure quantum freezing of the 5$^{th}$ dimension | grammar errors are corrected | Int.J.Mod.Phys. D14 (2005) 1293 | 10.1142/S0218271805007395 | null | gr-qc hep-th | null | It is shown that superthin and superlong gravitational flux tube solutions in
the 5D Kaluza-Klein gravity have the region $(\approx l_{Pl})$ where the metric
signature changes from $\{+,-,-,-,- \}$ to $\{-,-,-,-,+ \}$. Such change is too
quickly from one of the paradigms of quantum gravity which tells that the
Planck... | [
{
"created": "Wed, 15 Sep 2004 11:12:20 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Oct 2004 07:21:17 GMT",
"version": "v2"
},
{
"created": "Fri, 13 May 2005 11:59:25 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Dzhunushaliev",
"Vladimir",
""
]
] | It is shown that superthin and superlong gravitational flux tube solutions in the 5D Kaluza-Klein gravity have the region $(\approx l_{Pl})$ where the metric signature changes from $\{+,-,-,-,- \}$ to $\{-,-,-,-,+ \}$. Such change is too quickly from one of the paradigms of quantum gravity which tells that the Planck l... |
1905.09370 | Bob Holdom | Randy S. Conklin and Bob Holdom | Gravitational Wave "Echo" Spectra | 17 pages, 6 figures | Phys. Rev. D 100, 124030 (2019) | 10.1103/PhysRevD.100.124030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exotic compact objects may resemble black holes very closely while remaining
horizonless. They may be distinguished from black holes because they
effectively give rise to a resonant cavity for the propagation of low frequency
gravity waves. In a Green's function approach, the resonance structure appears
in a transfer... | [
{
"created": "Wed, 22 May 2019 21:19:03 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Sep 2019 16:32:36 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Dec 2019 20:04:18 GMT",
"version": "v3"
}
] | 2019-12-18 | [
[
"Conklin",
"Randy S.",
""
],
[
"Holdom",
"Bob",
""
]
] | Exotic compact objects may resemble black holes very closely while remaining horizonless. They may be distinguished from black holes because they effectively give rise to a resonant cavity for the propagation of low frequency gravity waves. In a Green's function approach, the resonance structure appears in a transfer f... |
2012.12914 | Abhishek Chowdhuri | Abhishek Chowdhuri, Arpan Bhattacharyya | Shadow analysis for rotating black holes in the presence of plasma for
an expanding universe | 27 pages, 6 figures, 2 tables, shadow plots and discussion regarding
distortion parameter updated, references added, version to appear in Physical
Review D | Phys. Rev. D 104, 064039 (2021) | 10.1103/PhysRevD.104.064039 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the structure of shadow for a Kerr-de Sitter black hole with a
non-magnetized, pressureless plasma surrounding it. Specific plasma
distributions are considered to separate the Hamilton-Jacobi equation and find
the photon regions. An analytic formula describing the boundary curve of the
shadow for such a bl... | [
{
"created": "Wed, 23 Dec 2020 19:03:16 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Jul 2021 17:43:10 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Aug 2021 16:32:07 GMT",
"version": "v3"
}
] | 2021-09-16 | [
[
"Chowdhuri",
"Abhishek",
""
],
[
"Bhattacharyya",
"Arpan",
""
]
] | We explore the structure of shadow for a Kerr-de Sitter black hole with a non-magnetized, pressureless plasma surrounding it. Specific plasma distributions are considered to separate the Hamilton-Jacobi equation and find the photon regions. An analytic formula describing the boundary curve of the shadow for such a blac... |
gr-qc/9712039 | Dan Selaru | D. Selaru, I. Dobrescu | On the PPN 1+2 Body Problem | 6 pages | null | null | null | gr-qc | null | A particulare case of the three-body problem, in the PPN formalism, is
presented. The Hamiltonian function is obtained and the problem is reduced to a
perturbed two-body one.
| [
{
"created": "Mon, 8 Dec 1997 15:23:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Selaru",
"D.",
""
],
[
"Dobrescu",
"I.",
""
]
] | A particulare case of the three-body problem, in the PPN formalism, is presented. The Hamiltonian function is obtained and the problem is reduced to a perturbed two-body one. |
2311.11148 | Celso de Camargo Barros Jr. | L. G. Barbosa and C. C. Barros Jr | Klein-Gordon oscillator subject to a Coulomb-type potential in
Bonnor-Melvin universe with a cosmological constant | 9 pages, 2 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we study spin-0 particles described by the Klein-Gordon
oscillator formalism in a spacetime which structure is determined by a
homogeneous magnetic field and a cosmological constant. For this purpose we
take into account a framework based on the Bonnor-Melvin solution with the
inclusion of the cosmologic... | [
{
"created": "Sat, 18 Nov 2023 19:11:32 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Barbosa",
"L. G.",
""
],
[
"Barros",
"C. C.",
"Jr"
]
] | In this work we study spin-0 particles described by the Klein-Gordon oscillator formalism in a spacetime which structure is determined by a homogeneous magnetic field and a cosmological constant. For this purpose we take into account a framework based on the Bonnor-Melvin solution with the inclusion of the cosmological... |
2309.04871 | Milko Estrada | R. Aros, Milko Estrada | A study about black hole solutions with nonconstant transversal
curvature and its conserved charges in Lovelock gravity | accepted in Phys.Rev.D | Phys. Rev. D 109 (2024), 104044 | 10.1103/PhysRevD.109.104044 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, the analysis of some new static black hole solutions of
Lovelock gravity with nonconstant curvature transverse section is presented. It
will be shown that the finiteness of the charges and the action principle rely
on the existence of constraints on the geometry of the transverse sections.
Finally, in t... | [
{
"created": "Sat, 9 Sep 2023 20:15:32 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Oct 2023 11:40:01 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Apr 2024 19:30:23 GMT",
"version": "v3"
}
] | 2024-05-15 | [
[
"Aros",
"R.",
""
],
[
"Estrada",
"Milko",
""
]
] | In this work, the analysis of some new static black hole solutions of Lovelock gravity with nonconstant curvature transverse section is presented. It will be shown that the finiteness of the charges and the action principle rely on the existence of constraints on the geometry of the transverse sections. Finally, in thi... |
1712.02297 | Yen Chin Ong | Yen Chin Ong, S. Sedigheh Hashemi, Rui An, Bin Wang | Stephani Cosmology: Entropically Viable But Observationally Challenged | Discussion on observational constraints elaborated. Version accepted
by EPJC | Eur. Phys. J. C 78 (2018) 405 | 10.1140/epjc/s10052-018-5866-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inhomogeneous cosmological models such as the Stephani universes could, in
principle, provide an explanation for the observed accelerated expansion of the
Universe. Working with a concrete, popular model of the Stephani cosmology --
the Stephani-Dabrowski model, we found that it is entropically viable. We also
commen... | [
{
"created": "Wed, 6 Dec 2017 17:23:49 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2018 12:40:56 GMT",
"version": "v2"
}
] | 2018-06-01 | [
[
"Ong",
"Yen Chin",
""
],
[
"Hashemi",
"S. Sedigheh",
""
],
[
"An",
"Rui",
""
],
[
"Wang",
"Bin",
""
]
] | Inhomogeneous cosmological models such as the Stephani universes could, in principle, provide an explanation for the observed accelerated expansion of the Universe. Working with a concrete, popular model of the Stephani cosmology -- the Stephani-Dabrowski model, we found that it is entropically viable. We also comment ... |
1905.09832 | Marcus H\"og{\aa}s | Marcus H\"og{\aa}s, Mikica Kocic, Francesco Torsello, Edvard
M\"ortsell | Generalized Vaidya solutions in bimetric gravity | 15 pages, 2 figures. Updates in v2: changed title of the paper, added
appendix on the Fierz-Pauli mass, removed all occurences of "bare
cosmological constant" in the text and changed the comparison between
bimetric gravity and GR accordingly, updated references, corrected typo in
eq. (2.6b) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the endpoint of spherically symmetric gravitational
collapse is a Schwarzschild--[(A)dS] black hole. In bimetric gravity, it has
been speculated that a static end state must also be Schwarzschild--[(A)dS]. To
this end, we present a set of exact solutions, including collapsing massless
dust part... | [
{
"created": "Thu, 23 May 2019 18:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jun 2020 09:56:05 GMT",
"version": "v2"
}
] | 2020-06-09 | [
[
"Högås",
"Marcus",
""
],
[
"Kocic",
"Mikica",
""
],
[
"Torsello",
"Francesco",
""
],
[
"Mörtsell",
"Edvard",
""
]
] | In general relativity, the endpoint of spherically symmetric gravitational collapse is a Schwarzschild--[(A)dS] black hole. In bimetric gravity, it has been speculated that a static end state must also be Schwarzschild--[(A)dS]. To this end, we present a set of exact solutions, including collapsing massless dust partic... |
1308.4832 | Nelson Merino | Laura Andrianopoli, Nelson Merino, Felip Nadal, Mario Trigiante | General properties of the expansion methods of Lie algebras | 2 figures | J. Phys. A: Math. Theor. 46 (2013) 365204 (33pp) | 10.1088/1751-8113/46/36/365204 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of the relation between Lie algebras and groups, and especially the
derivation of new algebras from them, is a problem of great interest in
mathematics and physics, because finding a new Lie group from an already known
one also means that a new physical theory can be obtained from a known one. One
of the pr... | [
{
"created": "Thu, 22 Aug 2013 11:43:00 GMT",
"version": "v1"
}
] | 2013-08-23 | [
[
"Andrianopoli",
"Laura",
""
],
[
"Merino",
"Nelson",
""
],
[
"Nadal",
"Felip",
""
],
[
"Trigiante",
"Mario",
""
]
] | The study of the relation between Lie algebras and groups, and especially the derivation of new algebras from them, is a problem of great interest in mathematics and physics, because finding a new Lie group from an already known one also means that a new physical theory can be obtained from a known one. One of the proc... |
2407.06553 | Dan-Dan Lian | Wei-Si Qiu and Dan-Dan Lian and Peng-Ming Zhang | Gravitational orbital Hall effect of vortex light in Lense-Thirring
metric | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Vortex light, characterized by an intrinsic orbital angular momentum (OAM)
aligned with its propagation direction, is described through vortex
electromagnetic waves. Similar to the gravitational spin Hall effect (SHE),
vortex light is expected to exhibit intrinsic OAM-dependent trajectories and
deviations from the nu... | [
{
"created": "Tue, 9 Jul 2024 05:18:30 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2024 08:24:26 GMT",
"version": "v2"
}
] | 2024-08-12 | [
[
"Qiu",
"Wei-Si",
""
],
[
"Lian",
"Dan-Dan",
""
],
[
"Zhang",
"Peng-Ming",
""
]
] | Vortex light, characterized by an intrinsic orbital angular momentum (OAM) aligned with its propagation direction, is described through vortex electromagnetic waves. Similar to the gravitational spin Hall effect (SHE), vortex light is expected to exhibit intrinsic OAM-dependent trajectories and deviations from the null... |
0808.0239 | Albert V. Minkevich | A. V. Minkevich | To theory of gravitational interaction | 10 pages | Acta Phys. Polon. B40:229-239,2009 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some principal problems of general relativity theory and attempts of their
solution are discussed. The Poincare gauge theory of gravity as natural
generalization of Einsteinian gravitation theory is considered. The changes of
gravitational interaction in the frame of this theory leading to the solution
of principal p... | [
{
"created": "Sat, 2 Aug 2008 08:03:11 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Aug 2008 17:50:10 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Minkevich",
"A. V.",
""
]
] | Some principal problems of general relativity theory and attempts of their solution are discussed. The Poincare gauge theory of gravity as natural generalization of Einsteinian gravitation theory is considered. The changes of gravitational interaction in the frame of this theory leading to the solution of principal pro... |
gr-qc/0210037 | Thomas Buchert | Thomas Buchert and Mauro Carfora | Regional averaging and scaling in relativistic cosmology | LateX, IOPstyle, 48 pages, 11 figures; matches published version in
C.Q.G | Class.Quant.Grav.19:6109-6145,2002 | 10.1088/0264-9381/19/23/314 | null | gr-qc astro-ph hep-ph hep-th | null | Averaged inhomogeneous cosmologies lie at the forefront of interest, since
cosmological parameters like the rate of expansion or the mass density are to
be considered as volume-averaged quantities and only these can be compared with
observations. For this reason the relevant parameters are intrinsically
scale-depende... | [
{
"created": "Fri, 11 Oct 2002 18:55:30 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Nov 2002 16:23:40 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Buchert",
"Thomas",
""
],
[
"Carfora",
"Mauro",
""
]
] | Averaged inhomogeneous cosmologies lie at the forefront of interest, since cosmological parameters like the rate of expansion or the mass density are to be considered as volume-averaged quantities and only these can be compared with observations. For this reason the relevant parameters are intrinsically scale-dependent... |
1208.3165 | Lee Hodgkinson | Lee Hodgkinson and Jorma Louko | Unruh-DeWitt detector on the BTZ black hole | 8 pages 4 figures. Talk given talk given by L.H. at "Relativity and
Gravitation:100 Years after Einstein in Prague", Prague, 25 June -- 29 June
2012 | null | null | NSF-KITP-12-149 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine an Unruh-DeWitt particle detector coupled to a scalar field in
three-dimensional curved spacetime, within first-order perturbation theory. We
first obtain a causal and manifestly regular expression for the instantaneous
transition rate in an arbitrary Hadamard state. We then specialise to the
Ba\~nados-Tei... | [
{
"created": "Wed, 15 Aug 2012 17:37:13 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Hodgkinson",
"Lee",
""
],
[
"Louko",
"Jorma",
""
]
] | We examine an Unruh-DeWitt particle detector coupled to a scalar field in three-dimensional curved spacetime, within first-order perturbation theory. We first obtain a causal and manifestly regular expression for the instantaneous transition rate in an arbitrary Hadamard state. We then specialise to the Ba\~nados-Teite... |
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