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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1607.07488 | Yves Brihaye | Y. Brihaye, T. Delsate | Boson stars, neutron stars and black holes in five dimensions | 14 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Different types of gravitating compact objects occuring in d=5 space-time are
considered: boson stars, hairy black holes and perfect fluid solutions. All
these solutions of the Einstein equations coupled to matter have well
established counterparts in d=4; in particular neutron stars can be
modell{\S}ed more or less ... | [
{
"created": "Mon, 25 Jul 2016 21:30:36 GMT",
"version": "v1"
}
] | 2016-07-27 | [
[
"Brihaye",
"Y.",
""
],
[
"Delsate",
"T.",
""
]
] | Different types of gravitating compact objects occuring in d=5 space-time are considered: boson stars, hairy black holes and perfect fluid solutions. All these solutions of the Einstein equations coupled to matter have well established counterparts in d=4; in particular neutron stars can be modell{\S}ed more or less re... |
2011.04032 | Ruifeng Dong | Ruifeng Dong and Dejan Stojkovic | Gravitational wave echoes from black holes in massive gravity | 8 pages, 3 figures. Accepted for publication in Phys. Rev. D | Phys. Rev. D 103, 024058 (2021) | 10.1103/PhysRevD.103.024058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves are rapidly becoming a very reliable tool for testing
alternative theories of gravity. In particular, features in the gravitational
wave emission during black hole ringdown phase provide a direct probe of the
spacetime outside the black hole. In this article, we consider black holes in
ghost-free ... | [
{
"created": "Sun, 8 Nov 2020 17:30:55 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jan 2021 14:22:33 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Dong",
"Ruifeng",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | Gravitational waves are rapidly becoming a very reliable tool for testing alternative theories of gravity. In particular, features in the gravitational wave emission during black hole ringdown phase provide a direct probe of the spacetime outside the black hole. In this article, we consider black holes in ghost-free ma... |
2405.19385 | Mir Faizal | Lawrence M. Krauss, Francesco Marino, Samuel L. Braunstein, Mir
Faizal, Naveed A. Shah | Listening to Quantum Gravity? | 16 pages; Essay received an honorable mention in the Gravity Research
Foundation Essay Competition 2024. arXiv admin note: text overlap with
arXiv:2402.16136 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recent experimental progresses in controlling classical and quantum fluids
have made it possible to realize acoustic analogues of gravitational black
holes, where a flowing fluid provides an effective spacetime on which sound
waves propagate, demonstrating Hawking-like radiation and Penrose
superradiance. We propose ... | [
{
"created": "Wed, 29 May 2024 14:31:52 GMT",
"version": "v1"
}
] | 2024-05-31 | [
[
"Krauss",
"Lawrence M.",
""
],
[
"Marino",
"Francesco",
""
],
[
"Braunstein",
"Samuel L.",
""
],
[
"Faizal",
"Mir",
""
],
[
"Shah",
"Naveed A.",
""
]
] | Recent experimental progresses in controlling classical and quantum fluids have made it possible to realize acoustic analogues of gravitational black holes, where a flowing fluid provides an effective spacetime on which sound waves propagate, demonstrating Hawking-like radiation and Penrose superradiance. We propose th... |
2103.13993 | Santiago Ontanon | Santiago Ontanon and Miguel Alcubierre | Rotating Boson Stars Using Finite Differences and Global Newton Methods | 45 pages, 13 figures | null | 10.1088/1361-6382/ac0b53 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study Rotating Boson Star initial data for Numerical Relativity as
previously considered by Yoshida and Eriguchi, Lai (arXiv:gr-qc/0410040v2), and
Grandclement, Som\'e and Gourgoulhon (arXiv:1405.4837v3). We use a 3 + 1
decomposition as presented by Gourgoulhon (arXiv:1003.5015v2) and Alcubierre,
adapted to an axi... | [
{
"created": "Thu, 25 Mar 2021 17:31:44 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Ontanon",
"Santiago",
""
],
[
"Alcubierre",
"Miguel",
""
]
] | We study Rotating Boson Star initial data for Numerical Relativity as previously considered by Yoshida and Eriguchi, Lai (arXiv:gr-qc/0410040v2), and Grandclement, Som\'e and Gourgoulhon (arXiv:1405.4837v3). We use a 3 + 1 decomposition as presented by Gourgoulhon (arXiv:1003.5015v2) and Alcubierre, adapted to an axisy... |
1602.03336 | Oleg Zaslavskii | O. B. Zaslavskii | High energy particle collisions and geometry of horizon | 14 pages. Presentation expanded, typos corrected. To appear in IJMP D | Int. J. Mod. Phys. D (2016) 1650095 | 10.1142/S0218271816500954 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of two geodesic particles near the horizon of such an
axially symmetric black hole (rotating or static) that the metric coefficient
$g_{\phi \phi }\rightarrow 0$ there. It is shown that (both for regular and
singular horizons) the energy in the centre of mass frame $% E_{c.m.}$ is
indefinitely l... | [
{
"created": "Wed, 10 Feb 2016 11:53:24 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jun 2016 20:35:02 GMT",
"version": "v2"
}
] | 2016-09-07 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of two geodesic particles near the horizon of such an axially symmetric black hole (rotating or static) that the metric coefficient $g_{\phi \phi }\rightarrow 0$ there. It is shown that (both for regular and singular horizons) the energy in the centre of mass frame $% E_{c.m.}$ is indefinitely lar... |
2112.11825 | Hamid R. Bakhtiarizadeh | Hamid R. Bakhtiarizadeh | Charged rotating black strings in Einsteinian quartic gravity | LaTex file, 18 pages, no figure, v2: some corrections have been made,
to appear in NPB | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We find an analytic asymptotically anti-de Sitter solution for charged
rotating black strings in Einsteinian quartic gravity. By studying the
near-horizon behavior of the solutions, we independently extract their
thermodynamic properties, analytically. As a consistency check, we show that
the first law of thermodynam... | [
{
"created": "Wed, 22 Dec 2021 12:04:09 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jun 2022 21:24:11 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Jan 2023 18:41:53 GMT",
"version": "v3"
}
] | 2023-01-18 | [
[
"Bakhtiarizadeh",
"Hamid R.",
""
]
] | We find an analytic asymptotically anti-de Sitter solution for charged rotating black strings in Einsteinian quartic gravity. By studying the near-horizon behavior of the solutions, we independently extract their thermodynamic properties, analytically. As a consistency check, we show that the first law of thermodynamic... |
1409.3378 | Anirban Saha Dr. | Sunandan Gangopadhyay, Anirban Saha, Swarup Saha | Noncommutative quantum mechanics of simple matter systems interacting
with circularly polarized gravitational waves | 11 pages, LaTex | Gen.Rel.Grav. 47 (2015) 3, 28 | 10.1007/s10714-015-1867-7 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The response of a test particle, both for the free case and under the
harmonic oscillator potential, to circularly polarized gravitational waves is
investigated in a noncommutative quantum mechanical setting. The system is
quantized following the prescription in \cite{ncgw1}. Standard algebraic
techniques are then em... | [
{
"created": "Thu, 11 Sep 2014 10:43:01 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Saha",
"Anirban",
""
],
[
"Saha",
"Swarup",
""
]
] | The response of a test particle, both for the free case and under the harmonic oscillator potential, to circularly polarized gravitational waves is investigated in a noncommutative quantum mechanical setting. The system is quantized following the prescription in \cite{ncgw1}. Standard algebraic techniques are then empl... |
1106.0711 | Fei-Hung Ho | Fei-Hung Ho, James M. Nester | Poincar\'e Gauge Theory With Coupled Even And Odd Parity Dynamic Spin-0
Modes: Dynamic Equations For Isotropic Bianchi Cosmologies | 13 pages, 2 figures | Int. J. Mod. Phys. D 20, 2125 (2011) | 10.1002/andp.201100101 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We are investigating the dynamics of a new Poincar\'e gauge theory of gravity
model, which has cross coupling between the spin-0$^+$ and spin-0$^-$ modes. To
this end we here consider a very appropriate situation---homogeneous-isotropic
cosmologies---which is relatively simple, and yet all the modes have
non-trivial ... | [
{
"created": "Fri, 3 Jun 2011 17:34:44 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2011 08:54:31 GMT",
"version": "v2"
}
] | 2016-10-26 | [
[
"Ho",
"Fei-Hung",
""
],
[
"Nester",
"James M.",
""
]
] | We are investigating the dynamics of a new Poincar\'e gauge theory of gravity model, which has cross coupling between the spin-0$^+$ and spin-0$^-$ modes. To this end we here consider a very appropriate situation---homogeneous-isotropic cosmologies---which is relatively simple, and yet all the modes have non-trivial dy... |
gr-qc/0112062 | Petr Hajicek | I. Kouletsis and P. Hajicek | Pair of null gravitating shells III. Algebra of Dirac's observables | 26 pages, Latex file using amstex, some references corrected | Class.Quant.Grav. 19 (2002) 2567-2586 | 10.1088/0264-9381/19/10/304 | BUTP-01/26 | gr-qc | null | The study of the two-shell system started in ``Pair of null gravitating
shells I and II'' (gr-qc/0112060--061) is continued. The pull back of the
Liouville form to the constraint surface, which contains complete information
about the Poisson brackets of Dirac observables, is computed in the singular
double-null Eddin... | [
{
"created": "Sat, 22 Dec 2001 10:53:08 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Dec 2001 14:06:59 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Kouletsis",
"I.",
""
],
[
"Hajicek",
"P.",
""
]
] | The study of the two-shell system started in ``Pair of null gravitating shells I and II'' (gr-qc/0112060--061) is continued. The pull back of the Liouville form to the constraint surface, which contains complete information about the Poisson brackets of Dirac observables, is computed in the singular double-null Eddingt... |
2303.16218 | William C. C. Lima | Markus B. Fr\"ob, William C. C. Lima | Synchronous coordinates and gauge-invariant observables in cosmological
spacetimes | 57 pages. Some discussions improved, references added and typos
corrected, matches published version | Class. Quantum Grav. 40, 215006 (2023) | 10.1088/1361-6382/acf98a | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the relational approach to construct gauge-invariant observables
in cosmological perturbation theory using synchronous coordinates. We construct
dynamical synchronous coordinates as non-local scalar functionals of the metric
perturbation in the fully non-linear theory in an arbitrary gauge. We show that
t... | [
{
"created": "Tue, 28 Mar 2023 18:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Oct 2023 00:18:02 GMT",
"version": "v2"
}
] | 2023-10-05 | [
[
"Fröb",
"Markus B.",
""
],
[
"Lima",
"William C. C.",
""
]
] | We consider the relational approach to construct gauge-invariant observables in cosmological perturbation theory using synchronous coordinates. We construct dynamical synchronous coordinates as non-local scalar functionals of the metric perturbation in the fully non-linear theory in an arbitrary gauge. We show that the... |
2402.17429 | Jun-Jin Peng | Jun-Jin Peng, Hua Li | Field equations and Noether potentials for higher-order theories of
gravity with Lagrangians involving $\Box^i R$, $\Box^i R_{\mu\nu}$ and
$\Box^i R_{\mu\nu\rho\sigma}$ | 73 pages, No figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we aim to perform a systematical investigation on the field
equations and Noether potentials for the higher-order gravity theories endowed
with Lagrangians depending on the metric and the Riemann curvature tensor,
together with $i$th ($i=1,2,\cdot\cdot\cdot$) powers of the
Beltrami-d'Alembertian operat... | [
{
"created": "Tue, 27 Feb 2024 11:42:18 GMT",
"version": "v1"
}
] | 2024-02-28 | [
[
"Peng",
"Jun-Jin",
""
],
[
"Li",
"Hua",
""
]
] | In this paper, we aim to perform a systematical investigation on the field equations and Noether potentials for the higher-order gravity theories endowed with Lagrangians depending on the metric and the Riemann curvature tensor, together with $i$th ($i=1,2,\cdot\cdot\cdot$) powers of the Beltrami-d'Alembertian operator... |
1308.1819 | Hoda Farahani | J. Sadeghi, M. Khurshudyan, H. Farahani | Phenomenological Varying Modified Chaplygin Gas with Variable $G$ and
$\Lambda$: Toy Models for Our Universe | 16 pages, 12 figure | Int J Theor Phys 55 (2016) 81 | 10.1007/s10773-015-2635-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article motivated by the recent articles and results of two authors.
Recently, J. Sadeghi and H. Farahani presented a work [1], where they include
viscosity and analyze general model, by this way they extended models
considered by M. Khurshudyan [2] and [3]. In this article, We tempt to consider
varying Modified... | [
{
"created": "Thu, 8 Aug 2013 11:40:25 GMT",
"version": "v1"
}
] | 2016-01-05 | [
[
"Sadeghi",
"J.",
""
],
[
"Khurshudyan",
"M.",
""
],
[
"Farahani",
"H.",
""
]
] | This article motivated by the recent articles and results of two authors. Recently, J. Sadeghi and H. Farahani presented a work [1], where they include viscosity and analyze general model, by this way they extended models considered by M. Khurshudyan [2] and [3]. In this article, We tempt to consider varying Modified C... |
1806.08364 | Kyle Slinker | Kyle Slinker, Charles R. Evans, Mark Hannam | Trumpet Initial Data for Boosted Black Holes | 18 pages, 18 figures | Phys. Rev. D 98, 044014 (2018) | 10.1103/PhysRevD.98.044014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a procedure for constructing initial data for boosted black holes
in the moving-punctures approach to numerical relativity that endows the
initial time slice from the outset with trumpet geometry within the black hole
interiors. We then demonstrate the procedure in numerical simulations using an
evolution... | [
{
"created": "Thu, 21 Jun 2018 18:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Aug 2018 01:11:37 GMT",
"version": "v2"
}
] | 2018-08-15 | [
[
"Slinker",
"Kyle",
""
],
[
"Evans",
"Charles R.",
""
],
[
"Hannam",
"Mark",
""
]
] | We describe a procedure for constructing initial data for boosted black holes in the moving-punctures approach to numerical relativity that endows the initial time slice from the outset with trumpet geometry within the black hole interiors. We then demonstrate the procedure in numerical simulations using an evolution c... |
1006.1610 | Lorenzo Sebastiani | Lorenzo Sebastiani | Dark Viscous Fluid coupled with Dark Matter and future singularity | 11 pages | Eur.Phys.J.C69:547-553,2010 | 10.1140/epjc/s10052-010-1398-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study effects of viscous fluid coupled with dark matter in our universe.
We consider bulk viscosity in the cosmic fluid and we suppose the existence of
a coupling between fluid and dark matter, in order to reproduce a stable de
Sitter universe protected against future-time singularities. More general
inhomogeneous... | [
{
"created": "Tue, 8 Jun 2010 16:48:21 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jun 2010 12:42:47 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Jun 2010 07:39:52 GMT",
"version": "v3"
}
] | 2013-10-30 | [
[
"Sebastiani",
"Lorenzo",
""
]
] | We study effects of viscous fluid coupled with dark matter in our universe. We consider bulk viscosity in the cosmic fluid and we suppose the existence of a coupling between fluid and dark matter, in order to reproduce a stable de Sitter universe protected against future-time singularities. More general inhomogeneous f... |
1801.03207 | Marko Vojinovic | Francisco Pipa, Nikola Paunkovic, Marko Vojinovic | Entanglement-induced deviation from the geodesic motion in quantum
gravity | v4: published version, 37 pages | Jour. Cosmol. Astropart. Phys. 09, 057 (2019) | 10.1088/1475-7516/2019/09/057 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the derivation of the effective equation of motion for a pointlike
particle in the framework of quantum gravity. Just like the geodesic motion of
a classical particle is a consequence of classical field theory coupled to
general relativity, we introduce the similar notion of an effective equation of
motion, ... | [
{
"created": "Wed, 10 Jan 2018 01:22:04 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Sep 2018 07:03:44 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Nov 2018 11:46:45 GMT",
"version": "v3"
},
{
"created": "Fri, 27 Sep 2019 22:45:30 GMT",
"version": "v4"
}
] | 2019-10-01 | [
[
"Pipa",
"Francisco",
""
],
[
"Paunkovic",
"Nikola",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We study the derivation of the effective equation of motion for a pointlike particle in the framework of quantum gravity. Just like the geodesic motion of a classical particle is a consequence of classical field theory coupled to general relativity, we introduce the similar notion of an effective equation of motion, bu... |
1601.05172 | Narayan Banerjee | Ankan Mukherjee and Narayan Banerjee | A parametric reconstruction of the cosmological jerk from diverse
observational data sets | 12 pages, 44 figures; Accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.93.043002 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A parametric reconstruction of the jerk parameter, the third order derivative
of the scale factor expressed in a dimensionless way, has been discussed.
Observational constraints on the model parameters have been obtained by Maximum
Likelihood Analysis of the models using Supernova Distance Modulus data (SNe),
Observa... | [
{
"created": "Wed, 20 Jan 2016 05:19:04 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Mukherjee",
"Ankan",
""
],
[
"Banerjee",
"Narayan",
""
]
] | A parametric reconstruction of the jerk parameter, the third order derivative of the scale factor expressed in a dimensionless way, has been discussed. Observational constraints on the model parameters have been obtained by Maximum Likelihood Analysis of the models using Supernova Distance Modulus data (SNe), Observati... |
1706.06443 | Jose Geraldo Pereira | A. Araujo, D. F. Lopez, J. G. Pereira | de Sitter invariant special relativity and galaxy rotation curves | 12 pages, 1 figure. V2: presentation changes aiming at clarifying the
text, 13 pages, 1 figure; matches published version. arXiv admin note: text
overlap with arXiv:1704.02120 | Grav. Cosm. 25 (2019) 157-163 | 10.1134/S0202289319020026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Owing to the existence of an invariant length at the Planck scale, Einstein
special relativity breaks down at that scale. A possible solution to this
problem is arguably to replace the Poincar\'e invariant Einstein special
relativity by a de Sitter invariant special relativity. In addition to
reconciling Lorentz symm... | [
{
"created": "Sat, 17 Jun 2017 14:11:25 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2019 18:18:34 GMT",
"version": "v2"
}
] | 2019-06-14 | [
[
"Araujo",
"A.",
""
],
[
"Lopez",
"D. F.",
""
],
[
"Pereira",
"J. G.",
""
]
] | Owing to the existence of an invariant length at the Planck scale, Einstein special relativity breaks down at that scale. A possible solution to this problem is arguably to replace the Poincar\'e invariant Einstein special relativity by a de Sitter invariant special relativity. In addition to reconciling Lorentz symmet... |
gr-qc/9701065 | Andy Shiekh | S. Bellucci and A. Shiekh | Gravity Quantized (the high tension string) | 7 pages, no figures, LaTeX, talk for the XX International Workshop on
the Fundamantal Problems of High Energy Physics and Field Theory, Protvino,
Russia, June 1997 | XX International Workshop on High Energy Physics and Field Theory,
Protvino, Russia, June 1997 | null | LNF-97/012 (P) | gr-qc hep-ph hep-th | null | A candidate theory of gravity quantized is reviewed.
| [
{
"created": "Thu, 30 Jan 1997 13:39:18 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Aug 1997 05:50:57 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Bellucci",
"S.",
""
],
[
"Shiekh",
"A.",
""
]
] | A candidate theory of gravity quantized is reviewed. |
1512.08972 | Sunil Maharaj | Sunil D. Maharaj, Brian Chilambwe, Sudan Hansraj | Exact barotropic distributions in Einstein-Gauss-Bonnet gravity | 15 pages, submitted for publication | Phys. Rev. D 91, 084049 (2015) | 10.1103/PhysRevD.91.084049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New exact solutions to the field equations in the Einstein--Gauss--Bonnet
modified theory of gravity for a 5--dimensional spherically symmetric static
distribution of a perfect fluid is obtained. The Frobenius method is used to
obtain this solution in terms of an infinite series. Exact solutions are
generated in term... | [
{
"created": "Wed, 30 Dec 2015 15:19:44 GMT",
"version": "v1"
}
] | 2016-01-06 | [
[
"Maharaj",
"Sunil D.",
""
],
[
"Chilambwe",
"Brian",
""
],
[
"Hansraj",
"Sudan",
""
]
] | New exact solutions to the field equations in the Einstein--Gauss--Bonnet modified theory of gravity for a 5--dimensional spherically symmetric static distribution of a perfect fluid is obtained. The Frobenius method is used to obtain this solution in terms of an infinite series. Exact solutions are generated in terms ... |
1311.6203 | Steven Willison | Steven Willison | A Re-examination of the isometric embedding approach to General
Relativity | 28 pages, no figures. v3- some clarifications and minor corrections | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider gravitational field equations which are Einstein equations
written in terms of embedding coordinates in some higher dimensional Minkowski
space. Our main focus is to address some tricky issues relating to the Cauchy
problem and possible non-equivalence with the intrinsic Einstein theory. The
well known th... | [
{
"created": "Mon, 25 Nov 2013 03:39:59 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Dec 2013 13:22:17 GMT",
"version": "v2"
},
{
"created": "Sat, 24 May 2014 16:07:03 GMT",
"version": "v3"
}
] | 2014-05-27 | [
[
"Willison",
"Steven",
""
]
] | We consider gravitational field equations which are Einstein equations written in terms of embedding coordinates in some higher dimensional Minkowski space. Our main focus is to address some tricky issues relating to the Cauchy problem and possible non-equivalence with the intrinsic Einstein theory. The well known theo... |
2301.08070 | Javier Relancio | J. M. Carmona, J. L. Cort\'es, J. J. Relancio, M. A. Reyes | A new perspective on Doubly Special Relativity | 8 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Doubly special relativity considers a deformation of the special relativistic
kinematics parametrized by a high-energy scale, in such a way that it preserves
a relativity principle. When this deformation is assumed to be applied to any
interaction between particles one faces some inconsistencies. In order to avoid
th... | [
{
"created": "Thu, 19 Jan 2023 13:30:19 GMT",
"version": "v1"
}
] | 2023-01-20 | [
[
"Carmona",
"J. M.",
""
],
[
"Cortés",
"J. L.",
""
],
[
"Relancio",
"J. J.",
""
],
[
"Reyes",
"M. A.",
""
]
] | Doubly special relativity considers a deformation of the special relativistic kinematics parametrized by a high-energy scale, in such a way that it preserves a relativity principle. When this deformation is assumed to be applied to any interaction between particles one faces some inconsistencies. In order to avoid them... |
2401.12314 | Sotirios Karamitsos | Laur J\"arv, Sotirios Karamitsos, Margus Saal | Global Portraits of Nonminimal Inflation: Metric and Palatini | 32 pages, 4 figures; improved wordings, added references and
corrected typos | Phys. Rev. D 109, 084073 (2024) | 10.1103/PhysRevD.109.084073 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the global phase space dynamics of single
nonminimally coupled scalar field inflation models in the metric and Palatini
formalisms. Working in the Jordan frame, we derive the scalar-tensor general
field equations and flat FLRW cosmological equations, and present the Palatini
and metric equatio... | [
{
"created": "Mon, 22 Jan 2024 19:17:16 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2024 20:08:48 GMT",
"version": "v2"
}
] | 2024-06-25 | [
[
"Järv",
"Laur",
""
],
[
"Karamitsos",
"Sotirios",
""
],
[
"Saal",
"Margus",
""
]
] | In this paper, we study the global phase space dynamics of single nonminimally coupled scalar field inflation models in the metric and Palatini formalisms. Working in the Jordan frame, we derive the scalar-tensor general field equations and flat FLRW cosmological equations, and present the Palatini and metric equations... |
1511.08652 | Reinoud Slagter | Reinoud Jan Slagter | Tangled up in Spinning Cosmic Strings | preliminary version. 12 figures. A short version was presented at the
second Time Machine Factory conference in Turin, 25-28 oct 2015 | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known for a long time that the space time around a spinning cylindrical
symmetric compact object such as the cosmic string, show un-physical behavior,
i.e., they would possess closed time like curves (CTC). This controversy with
Hawking's chronology protection conjecture is unpleasant but can be understood
if o... | [
{
"created": "Fri, 27 Nov 2015 13:00:24 GMT",
"version": "v1"
}
] | 2015-11-30 | [
[
"Slagter",
"Reinoud Jan",
""
]
] | It is known for a long time that the space time around a spinning cylindrical symmetric compact object such as the cosmic string, show un-physical behavior, i.e., they would possess closed time like curves (CTC). This controversy with Hawking's chronology protection conjecture is unpleasant but can be understood if one... |
1908.06501 | Magd Elias Kahil | Magd E. Kahil | Spinning and Spinning Deviation Equations of Bi-metric Type Theories | 18 LaTeX pages | null | 10.1007/s12648-020-01793-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spinning equations of bi-metric types theories of gravity, the counterpart of
the Papapetrou spinning equations of motion have been derived as well as their
corresponding spinning deviation equations. Due to introducing different types
of bi-metric theories, the influence of different curvatures based upon
different ... | [
{
"created": "Sun, 18 Aug 2019 18:58:05 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Oct 2019 21:41:29 GMT",
"version": "v2"
}
] | 2020-08-26 | [
[
"Kahil",
"Magd E.",
""
]
] | Spinning equations of bi-metric types theories of gravity, the counterpart of the Papapetrou spinning equations of motion have been derived as well as their corresponding spinning deviation equations. Due to introducing different types of bi-metric theories, the influence of different curvatures based upon different af... |
2310.17781 | Soumen Koley | Soumen Koley, Jan Harms, Annalisa Allocca, Enrico Calloni, Rosario De
Rosa, Luciano Errico, Marina Esposito, Francesca Badaracco, Luca Rei,
Alessandro Bertolini, Tomasz Bulik, Marek Cieslar, Mateusz Pietrzak, Mariusz
Suchenek, Irene Fiori, Andrea Paoli, Maria Concetta Tringali, Paolo Ruggi,
Stefan Hild, Ayatri ... | Design and implementation of a seismic Newtonian-noise cancellation
system for the Virgo gravitational-wave detector | null | null | null | null | gr-qc astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Terrestrial gravity perturbations caused by seismic fields produce the
so-called Newtonian noise in gravitational-wave detectors, which is predicted
to limit their sensitivity in the upcoming observing runs. In the past, this
noise was seen as an infrastructural limitation, i.e., something that cannot be
overcome wit... | [
{
"created": "Thu, 26 Oct 2023 21:13:55 GMT",
"version": "v1"
}
] | 2023-10-30 | [
[
"Koley",
"Soumen",
""
],
[
"Harms",
"Jan",
""
],
[
"Allocca",
"Annalisa",
""
],
[
"Calloni",
"Enrico",
""
],
[
"De Rosa",
"Rosario",
""
],
[
"Errico",
"Luciano",
""
],
[
"Esposito",
"Marina",
""
],
[
... | Terrestrial gravity perturbations caused by seismic fields produce the so-called Newtonian noise in gravitational-wave detectors, which is predicted to limit their sensitivity in the upcoming observing runs. In the past, this noise was seen as an infrastructural limitation, i.e., something that cannot be overcome witho... |
gr-qc/0403021 | Jason Steffen | E. C. Berg (1), J. H. Steffen (2), M. K. Bantel (1), P. E. Boynton
(2), W. D. Cross (1), T. Inoue (1), M. W. Moore (2), R. D. Newman (1) ((1)
University of California, Irvine, (2) University of Washington) | Laboratory Tests of Gravitational Physics Using a Cryogenic Torsion
Pendulum | 17 pages, 11 figures, contribution to the 10th Marcel Grossman
Conference Proceedings (Rio de Janeiro, July 20 - 26, 2003) - changed wording
in first paragraph of section 5 | null | 10.1142/9789812704030_0061 | null | gr-qc | null | Progress and plans are reported for a program of gravitational physics
experiments using cryogenic torsion pendula undergoing large amplitude
torsional oscillation. The program includes a UC Irvine project to measure the
gravitational constant G and joint UC Irvine - U. Washington projects to test
the gravitational i... | [
{
"created": "Thu, 4 Mar 2004 00:40:27 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 2004 18:02:05 GMT",
"version": "v2"
}
] | 2016-11-09 | [
[
"Berg",
"E. C.",
""
],
[
"Steffen",
"J. H.",
""
],
[
"Bantel",
"M. K.",
""
],
[
"Boynton",
"P. E.",
""
],
[
"Cross",
"W. D.",
""
],
[
"Inoue",
"T.",
""
],
[
"Moore",
"M. W.",
""
],
[
"Newman",
"... | Progress and plans are reported for a program of gravitational physics experiments using cryogenic torsion pendula undergoing large amplitude torsional oscillation. The program includes a UC Irvine project to measure the gravitational constant G and joint UC Irvine - U. Washington projects to test the gravitational inv... |
0812.4342 | Kamal Nandi | K.K. Nandi, I.R. Kizirgulov, O.V. Mikolaychuk, N.P. Mikolaychuk, A.A.
Potapov | Quantum Phase Shift in Chern-Simons Modified Gravity | 16 pages, minor errors corrected. Accepted for publication in Phys.
Rev. D | Phys.Rev.D79:083006,2009 | 10.1103/PhysRevD.79.083006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a unified approach of optical-mechanical analogy in a semiclassical
formula, we evaluate the effect of Chern-Simons modified gravity on the quantum
phase shift of de Broglie waves in neutron interferometry. The phase shift
calculated here reveals, in a single equation, a combination of effects coming
from Newto... | [
{
"created": "Tue, 23 Dec 2008 07:17:23 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Dec 2008 03:13:39 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Apr 2009 09:26:11 GMT",
"version": "v3"
}
] | 2009-11-06 | [
[
"Nandi",
"K. K.",
""
],
[
"Kizirgulov",
"I. R.",
""
],
[
"Mikolaychuk",
"O. V.",
""
],
[
"Mikolaychuk",
"N. P.",
""
],
[
"Potapov",
"A. A.",
""
]
] | Using a unified approach of optical-mechanical analogy in a semiclassical formula, we evaluate the effect of Chern-Simons modified gravity on the quantum phase shift of de Broglie waves in neutron interferometry. The phase shift calculated here reveals, in a single equation, a combination of effects coming from Newtoni... |
1103.3898 | Charis Anastopoulos | Charis Anastopoulos and Ntina Savvidou | Entropy of singularities in self-gravitating radiation | 28 pages, 9 figures. Revised version with additional comments and
references, and a section on physical interpretation. Version to appear in
CQG | Class. Quantum Grav. 29, 025004 (2012) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bekenstein-Hawking entropy suggests that thermodynamics is an intrinsic
ingredient of gravity. Here, we explore the idea that requirements of
thermodynamic consistency could determine the gravitational entropy in other
set-ups. We implement this idea in a simple model: static, spherically
symmetric solutions to E... | [
{
"created": "Sun, 20 Mar 2011 22:42:47 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2011 12:24:29 GMT",
"version": "v2"
}
] | 2011-12-23 | [
[
"Anastopoulos",
"Charis",
""
],
[
"Savvidou",
"Ntina",
""
]
] | The Bekenstein-Hawking entropy suggests that thermodynamics is an intrinsic ingredient of gravity. Here, we explore the idea that requirements of thermodynamic consistency could determine the gravitational entropy in other set-ups. We implement this idea in a simple model: static, spherically symmetric solutions to Ein... |
2305.04321 | Hoang Nguyen | Hoang Ky Nguyen, Mustapha Azreg-A\"inou | Traversable Morris-Thorne-Buchdahl wormholes in quadratic gravity | 11 pages, 4 figures. Major improvements in Fig. 3 and in body of
text. Several relevant references added. Accepted for Eur. Phys. J. C | Eur.Phys.J.C 83 (2023) 7, 626 | 10.1140/epjc/s10052-023-11805-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The special Buchdahl-inspired metric obtained in a recent paper [Phys. Rev. D
107, 104008 (2023)] describes asymptotically flat spacetimes in pure
$\mathcal{R}^{2}$ gravity. The metric depends on a new (Buchdahl) parameter
$\tilde{k}$ of higher-derivative characteristic, and recovers the Schwarzschild
metric when $\t... | [
{
"created": "Sun, 7 May 2023 16:09:16 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Jul 2023 04:05:10 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Nguyen",
"Hoang Ky",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | The special Buchdahl-inspired metric obtained in a recent paper [Phys. Rev. D 107, 104008 (2023)] describes asymptotically flat spacetimes in pure $\mathcal{R}^{2}$ gravity. The metric depends on a new (Buchdahl) parameter $\tilde{k}$ of higher-derivative characteristic, and recovers the Schwarzschild metric when $\til... |
gr-qc/9312007 | null | Vu B Ho | Spacetime structure and Quantum physics | 10 pages, Latex | null | null | null | gr-qc hep-th | null | A description of electromagnetism as four-dimensional spacetime structure
leads to the dynamics of a charged particle being determined only by the
four-vector potential and the existence of an electromagnetic field depending
on the topological structure of the background spacetime. When the spacetime
structure of ele... | [
{
"created": "Fri, 3 Dec 1993 14:10:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ho",
"Vu B",
""
]
] | A description of electromagnetism as four-dimensional spacetime structure leads to the dynamics of a charged particle being determined only by the four-vector potential and the existence of an electromagnetic field depending on the topological structure of the background spacetime. When the spacetime structure of elect... |
1407.4748 | Richard Woodard | R. P. Woodard (University of Florida) | Perturbative Quantum Gravity Comes of Age | 64 pages, 6 figures, review article written for "One Hundred Years of
General Relativity" | null | 10.1142/S0218271814300201 | UFIFT-QG-14-05 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I argue that cosmological data from the epoch of primordial inflation is
catalyzing the maturation of quantum gravity from speculation into a hard
science. I explain why quantum gravitational effects from primordial inflation
are observable. I then review what has been done, both theoretically and
observationally, an... | [
{
"created": "Thu, 17 Jul 2014 17:34:37 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | I argue that cosmological data from the epoch of primordial inflation is catalyzing the maturation of quantum gravity from speculation into a hard science. I explain why quantum gravitational effects from primordial inflation are observable. I then review what has been done, both theoretically and observationally, and ... |
1302.1846 | Aneta Wojnar | Andrzej Borowiec and Aneta Wojnar | Geometry of almost-product Lorentzian manifolds and relativistic
observer | 13 pages, 2 tables, Talk during the conference Barcelona Postgrad
Encounters on Fundamental Physics, October 2012 | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notion of relativistic observer is confronted with Naveira's
classification of (pseudo-)Riemannian almost-product structures on space-time
manifolds. Some physical properties and their geometrical counterparts are
shortly discussed.
| [
{
"created": "Thu, 7 Feb 2013 20:08:02 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2013 21:24:02 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Jun 2013 18:09:24 GMT",
"version": "v3"
}
] | 2014-12-04 | [
[
"Borowiec",
"Andrzej",
""
],
[
"Wojnar",
"Aneta",
""
]
] | The notion of relativistic observer is confronted with Naveira's classification of (pseudo-)Riemannian almost-product structures on space-time manifolds. Some physical properties and their geometrical counterparts are shortly discussed. |
1003.2689 | Kengo Maeda | Kengo Maeda, Jun-ichirou Koga, and Shunsuke Fujii | The final fate of instability of Reissner-Nordstr\"om-anti-de Sitter
black holes by charged complex scalar fields | 9 pages, 4 figures. To appear in PRD | Phys.Rev.D81:124020,2010 | 10.1103/PhysRevD.81.124020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate instability of 4-dimensional Reissner-Nordstr\"om-anti-de
Sitter (RN-AdS$_4$) black holes with various topologies by charged scalar field
perturbations. We numerically find that the RN-AdS$_4$ black holes become
unstable against the linear perturbations below a critical temperature. It is
analytically ... | [
{
"created": "Sat, 13 Mar 2010 08:03:33 GMT",
"version": "v1"
},
{
"created": "Fri, 21 May 2010 04:12:55 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"Maeda",
"Kengo",
""
],
[
"Koga",
"Jun-ichirou",
""
],
[
"Fujii",
"Shunsuke",
""
]
] | We investigate instability of 4-dimensional Reissner-Nordstr\"om-anti-de Sitter (RN-AdS$_4$) black holes with various topologies by charged scalar field perturbations. We numerically find that the RN-AdS$_4$ black holes become unstable against the linear perturbations below a critical temperature. It is analytically sh... |
1208.5772 | Oscar J. C. Dias | Oscar J. C. Dias, Gary T. Horowitz, Don Marolf, Jorge E. Santos | On the Nonlinear Stability of Asymptotically Anti-de Sitter Solutions | 26 pages. 5 figures | null | 10.1088/0264-9381/29/23/235019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite the recent evidence that anti-de Sitter spacetime is nonlinearly
unstable, we argue that many asymptotically anti-de Sitter solutions are
nonlinearly stable. This includes geons, boson stars, and black holes. As part
of our argument, we calculate the frequencies of long-lived gravitational
quasinormal modes o... | [
{
"created": "Tue, 28 Aug 2012 20:00:06 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Horowitz",
"Gary T.",
""
],
[
"Marolf",
"Don",
""
],
[
"Santos",
"Jorge E.",
""
]
] | Despite the recent evidence that anti-de Sitter spacetime is nonlinearly unstable, we argue that many asymptotically anti-de Sitter solutions are nonlinearly stable. This includes geons, boson stars, and black holes. As part of our argument, we calculate the frequencies of long-lived gravitational quasinormal modes of ... |
2402.08089 | Massimo Giovannini | Massimo Giovannini | Fuzzy Bounces | 40 pages, 7 figures; improved discussions and corrected typos to
match the published version | Class. Quantum Grav. 41 (2024) 105010 | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We observe that the energy and the enthalpy densities can be smeared by two
fudge factors that are constrained by the contracted Bianchi identities.
Depending on the analytic properties of the smearing functions the underlying
cosmological solutions belong to two physically different classes, namely the
bounces of th... | [
{
"created": "Mon, 12 Feb 2024 22:15:16 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Apr 2024 17:52:24 GMT",
"version": "v2"
}
] | 2024-04-25 | [
[
"Giovannini",
"Massimo",
""
]
] | We observe that the energy and the enthalpy densities can be smeared by two fudge factors that are constrained by the contracted Bianchi identities. Depending on the analytic properties of the smearing functions the underlying cosmological solutions belong to two physically different classes, namely the bounces of the ... |
1705.07882 | Luke Bovard | Luke Bovard, Luciano Rezzolla | On the use of tracer particles in simulations of binary neutron stars | 26 pages, 11 figures, matches version accepted to CQG | Classical and Quantum Gravity, 34, 21 2017 | 10.1088/1361-6382/aa8d98 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In grid-based codes that provide the combined solution of the Einstein
equations and of relativistic hydrodynamics, the history of the fluid is not
simple to track, especially when compared with particle-based codes. The use of
tracers, namely massless particles that are advected with the flow, represents
a simple an... | [
{
"created": "Mon, 22 May 2017 17:54:46 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2017 13:49:57 GMT",
"version": "v2"
}
] | 2018-03-28 | [
[
"Bovard",
"Luke",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | In grid-based codes that provide the combined solution of the Einstein equations and of relativistic hydrodynamics, the history of the fluid is not simple to track, especially when compared with particle-based codes. The use of tracers, namely massless particles that are advected with the flow, represents a simple and ... |
2102.06023 | Mariniel Galvao Jr | M. S. Galv\~ao Jr | Symplectic analysis for the Holst action with Dirac fields | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we review the canonical analysis of the Holst-Dirac action from
the point of view of the Faddeev-Jackiw symplectic procedure using the Barcelo
Neto-Wotzasek algorithm. We replicate the results found in the literature for
the theory's constraints, recover some of the expressions for gauge symmetries
of th... | [
{
"created": "Wed, 10 Feb 2021 18:59:20 GMT",
"version": "v1"
}
] | 2021-02-12 | [
[
"Galvão",
"M. S.",
"Jr"
]
] | In this work we review the canonical analysis of the Holst-Dirac action from the point of view of the Faddeev-Jackiw symplectic procedure using the Barcelo Neto-Wotzasek algorithm. We replicate the results found in the literature for the theory's constraints, recover some of the expressions for gauge symmetries of the ... |
1806.11193 | Dmitri Gal'tsov | G\'erard Cl\'ement and Dmitri Gal'tsov | Stationary double black hole without naked ring singularity | 35 pages revtex4, 8 figures | Class. Quantum Grav. 35 (2018) 214002 | 10.1088/1361-6382/aae4ed | LAPTH-026/18 | gr-qc astro-ph.HE hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently double black hole vacuum and electrovacuum metrics attracted
attention as exact solutions suitable for visualization of ultra-compact
objects beyond the Kerr paradigm. However, many of the proposed systems are
plagued with ring curvature singularities. Here we present a new simple
solution of this type which... | [
{
"created": "Thu, 28 Jun 2018 21:09:30 GMT",
"version": "v1"
}
] | 2018-11-01 | [
[
"Clément",
"Gérard",
""
],
[
"Gal'tsov",
"Dmitri",
""
]
] | Recently double black hole vacuum and electrovacuum metrics attracted attention as exact solutions suitable for visualization of ultra-compact objects beyond the Kerr paradigm. However, many of the proposed systems are plagued with ring curvature singularities. Here we present a new simple solution of this type which i... |
0807.0103 | Ettore Minguzzi | E. Minguzzi | Chronological null complete spacetimes admit a global time | Latex2e, 4 pages, 1 figure. To appear in the Proceedings of the
"Spanish Relativity Meeting: Physics and Mathematics of Gravitation",
Salamanca (Spain), September 15-19, 2008 | AIP Conf.Proc.1122:352-355,2009 | 10.1063/1.3141324 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The result "chronological spacetimes without lightlike lines are stably
causal" is announced and motivated. It implies that chronological spacetimes
which are null geodesically complete and satisfy the null genericity and the
null (averaged) energy condition admit a time function.
| [
{
"created": "Tue, 1 Jul 2008 10:16:23 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Dec 2008 17:23:38 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Minguzzi",
"E.",
""
]
] | The result "chronological spacetimes without lightlike lines are stably causal" is announced and motivated. It implies that chronological spacetimes which are null geodesically complete and satisfy the null genericity and the null (averaged) energy condition admit a time function. |
1301.2801 | Oleg Zaslavskii | O. B. Zaslavskii | Acceleration of particles by acceleration horizons | 30 pages. Presentation improved and expanded, Sec. VI and VII and
Appendix added. Matches version accepted in PRD. I thank the referee for
helping in the improvement of this paper | Phys. Rev. D 88, 104016 (2013) | 10.1103/PhysRevD.88.104016 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of two particles in the vicinity of the extremal
acceleration horizon (charged or rotating) that includes the Bertotti-Robinson
space-time and the geometry of the Kerr throat. It is shown that the energy in
the centre of mass frame E_{c.m.} can become indefinitely large if parameters
of one of t... | [
{
"created": "Sun, 13 Jan 2013 17:49:20 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jan 2013 22:56:52 GMT",
"version": "v2"
},
{
"created": "Sun, 4 Aug 2013 12:14:45 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Oct 2013 21:58:47 GMT",
"version": "v4"
}
] | 2013-11-19 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of two particles in the vicinity of the extremal acceleration horizon (charged or rotating) that includes the Bertotti-Robinson space-time and the geometry of the Kerr throat. It is shown that the energy in the centre of mass frame E_{c.m.} can become indefinitely large if parameters of one of the... |
2212.11869 | Christian Dioguardi | Christian Dioguardi, Antonio Racioppi, Eemeli Tomberg | Beyond (and back to) Palatini quadratic gravity and inflation | 22 pages, 7 figures, revised version: added a section on $F(R,X)$
models, title, abstract and conclusions revised | JCAP 03 (2024) 041 | 10.1088/1475-7516/2024/03/041 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | We study single-field slow-roll inflation embedded in Palatini $F(R)$ gravity
where $F(R)$ grows faster than $R^2$. Surprisingly, the consistency of the
theory requires the Jordan frame inflaton potential to be unbounded from below.
Even more surprisingly, this corresponds to an Einstein frame inflaton
potential boun... | [
{
"created": "Thu, 22 Dec 2022 17:02:57 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Feb 2023 17:56:26 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Jul 2023 13:29:46 GMT",
"version": "v3"
},
{
"created": "Wed, 20 Mar 2024 15:12:07 GMT",
"version": "v4"
}
] | 2024-03-21 | [
[
"Dioguardi",
"Christian",
""
],
[
"Racioppi",
"Antonio",
""
],
[
"Tomberg",
"Eemeli",
""
]
] | We study single-field slow-roll inflation embedded in Palatini $F(R)$ gravity where $F(R)$ grows faster than $R^2$. Surprisingly, the consistency of the theory requires the Jordan frame inflaton potential to be unbounded from below. Even more surprisingly, this corresponds to an Einstein frame inflaton potential bounde... |
1604.08038 | Sebasti\'an C\'espedes | Clare Burrage, Sebastian Cespedes and Anne-Christine Davis | Disformal transformations on the CMB | null | null | 10.1088/1475-7516/2016/08/024 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the role of disformal transformation on cosmological
backgrounds and its relation to the speed of sound for tensor modes. A speed
different from one for tensor modes can arise in several contexts, such as
Galileons theories or massive gravity, nevertheless the speed is very
constrained to be one... | [
{
"created": "Mon, 25 Apr 2016 20:00:03 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Burrage",
"Clare",
""
],
[
"Cespedes",
"Sebastian",
""
],
[
"Davis",
"Anne-Christine",
""
]
] | In this work we study the role of disformal transformation on cosmological backgrounds and its relation to the speed of sound for tensor modes. A speed different from one for tensor modes can arise in several contexts, such as Galileons theories or massive gravity, nevertheless the speed is very constrained to be one b... |
gr-qc/9907001 | Shahar Hod | Shahar Hod | Black-Hole Polarization and Cosmic Censorship | 10 pages | Phys.Rev. D60 (1999) 104031 | 10.1103/PhysRevD.60.104031 | null | gr-qc | null | The destruction of the black-hole event horizon is ruled out by both cosmic
censorship and the generalized second law of thermodynamics. We test the
consistency of this prediction in a (more) `dangerous' version of the gedanken
experiment suggested by Bekenstein and Rosenzweig. A U(1)-charged particle is
lowered {\it... | [
{
"created": "Thu, 1 Jul 1999 12:27:06 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 1999 08:29:08 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hod",
"Shahar",
""
]
] | The destruction of the black-hole event horizon is ruled out by both cosmic censorship and the generalized second law of thermodynamics. We test the consistency of this prediction in a (more) `dangerous' version of the gedanken experiment suggested by Bekenstein and Rosenzweig. A U(1)-charged particle is lowered {\it s... |
1309.4900 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Conformally coupled inflation | 12 pages, no figures, invited paper to appear in "Cosmology with
Fluid Components", special issue of "Galaxies" edited by I. Brevik | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A massive scalar field in a curved spacetime can propagate along the light
cone, a causal pathology, which can, in principle, be eliminated only if the
scalar couples conformally to the Ricci curvature of spacetime. This property
mandates conformal coupling for the field driving inflation in the early
universe. Durin... | [
{
"created": "Thu, 19 Sep 2013 09:07:06 GMT",
"version": "v1"
}
] | 2013-09-20 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | A massive scalar field in a curved spacetime can propagate along the light cone, a causal pathology, which can, in principle, be eliminated only if the scalar couples conformally to the Ricci curvature of spacetime. This property mandates conformal coupling for the field driving inflation in the early universe. During ... |
2206.13233 | Mohammed Khalil | Mohammed Khalil, Raissa F. P. Mendes, N\'estor Ortiz, Jan Steinhoff | Effective-action model for dynamical scalarization beyond the adiabatic
approximation | 15 pages, 11 figures. v2: matches published version | null | 10.1103/PhysRevD.106.104016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In certain scalar-field extensions to general relativity, scalar charges can
develop on compact objects in an inspiraling binary -- an effect known as
dynamical scalarization. This effect can be modeled using
effective-field-theory methods applied to the binary within the post-Newtonian
approximation. Past analytic i... | [
{
"created": "Mon, 27 Jun 2022 12:25:41 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Nov 2022 16:12:14 GMT",
"version": "v2"
}
] | 2022-11-23 | [
[
"Khalil",
"Mohammed",
""
],
[
"Mendes",
"Raissa F. P.",
""
],
[
"Ortiz",
"Néstor",
""
],
[
"Steinhoff",
"Jan",
""
]
] | In certain scalar-field extensions to general relativity, scalar charges can develop on compact objects in an inspiraling binary -- an effect known as dynamical scalarization. This effect can be modeled using effective-field-theory methods applied to the binary within the post-Newtonian approximation. Past analytic inv... |
1812.06457 | Valerio Faraoni | Valerio Faraoni and Jeremy C\^ot\'e | Scalar field as a null dust | null | null | 10.1140/epjc/s10052-019-6829-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a canonical, minimally coupled scalar field which is non-self
interacting and massless is equivalent to a null dust fluid (whether it is a
test or a gravitating field), in a spacetime region in which its gradient is
null. Under similar conditions, the gravitating and nonminimally coupled
Brans-Dicke-like... | [
{
"created": "Sun, 16 Dec 2018 13:10:32 GMT",
"version": "v1"
}
] | 2019-05-01 | [
[
"Faraoni",
"Valerio",
""
],
[
"Côté",
"Jeremy",
""
]
] | We show that a canonical, minimally coupled scalar field which is non-self interacting and massless is equivalent to a null dust fluid (whether it is a test or a gravitating field), in a spacetime region in which its gradient is null. Under similar conditions, the gravitating and nonminimally coupled Brans-Dicke-like s... |
1610.01754 | Iftikar Hossain Sardar | M.Zubair, I.H.Sardar, F.Rahaman, G.Abbas | Interior Solutions of Fluid Sphere in f(R,T) Gravity Admitting Conformal
Killing Vectors | 6 Pages, 6 Figures | Astrophys Space Sci (2016) 361:238 | 10.1007/s10509-016-2828-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the interior solutions of fluid Sphere in f(R,T) gravity admitting
conformal killing vectors, where R is Ricci scalar and T is trace of energy
momentum tensor. The solutions corresponding to isotropic and anisotropic
configurations have been investigated explicitly. Further, the anisotropic case
has been d... | [
{
"created": "Thu, 6 Oct 2016 07:08:23 GMT",
"version": "v1"
}
] | 2018-11-15 | [
[
"Zubair",
"M.",
""
],
[
"Sardar",
"I. H.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Abbas",
"G.",
""
]
] | We discuss the interior solutions of fluid Sphere in f(R,T) gravity admitting conformal killing vectors, where R is Ricci scalar and T is trace of energy momentum tensor. The solutions corresponding to isotropic and anisotropic configurations have been investigated explicitly. Further, the anisotropic case has been dea... |
1207.7089 | Elizabeth Winstanley | Marc Casals, Sam R. Dolan, Brien C. Nolan, Adrian C. Ottewill and
Elizabeth Winstanley | Kermions: quantization of fermions on Kerr space-time | 38 pages, 9 figures, explanations improved in Section III, matches
published version | Phys.Rev.D87:064027,2013 | 10.1103/PhysRevD.87.064027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a quantum fermion field on a background non-extremal Kerr black
hole. We discuss the definition of the standard black hole quantum states
(Boulware, Unruh and Hartle-Hawking), focussing particularly on the differences
between fermionic and bosonic quantum field theory. Since all fermion modes
(both particle ... | [
{
"created": "Mon, 30 Jul 2012 20:19:56 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jun 2013 10:56:54 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Casals",
"Marc",
""
],
[
"Dolan",
"Sam R.",
""
],
[
"Nolan",
"Brien C.",
""
],
[
"Ottewill",
"Adrian C.",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We study a quantum fermion field on a background non-extremal Kerr black hole. We discuss the definition of the standard black hole quantum states (Boulware, Unruh and Hartle-Hawking), focussing particularly on the differences between fermionic and bosonic quantum field theory. Since all fermion modes (both particle an... |
2105.10933 | Mariusz P. Dabrowski | Roberto Caroli, Mariusz P. Dabrowski, Vincenzo Salzano | Ricci cosmology in light of astronomical data | 14 pages, 5 tables, no figures, Revtex 4-1, an improved version | null | 10.1140/epjc/s10052-021-09666-9 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a new cosmological framework, dubbed Ricci Cosmology, has been
proposed. Such a framework has emerged from the study of relativistic dynamics
of fluids out of equilibrium in a curved background and is characterised by the
presence of deviations from the equilibrium pressure in the energy-momentum
tensor whi... | [
{
"created": "Sun, 23 May 2021 13:17:36 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jul 2021 12:12:37 GMT",
"version": "v2"
}
] | 2021-10-27 | [
[
"Caroli",
"Roberto",
""
],
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Salzano",
"Vincenzo",
""
]
] | Recently, a new cosmological framework, dubbed Ricci Cosmology, has been proposed. Such a framework has emerged from the study of relativistic dynamics of fluids out of equilibrium in a curved background and is characterised by the presence of deviations from the equilibrium pressure in the energy-momentum tensor which... |
gr-qc/0207024 | Dr. Anirudh Pradhan | Anirudh Pradhan, I. Iotemshi and G. P. Singh | Plane Symmetric Domain Wall in Lyra Geometry | Latex, 15 pages | Astrophys.Space Sci. 288 (2003) 315-325 | 10.1023/B:ASTR.0000006061.77421.c9 | null | gr-qc | null | In this paper general solutions are found for domain walls in Lyra geometry
in the plane symmetric spacetime metric given by Taub. Expressions for the
energy density and pressure of domain walls are derived in both cases of
uniform and time varying displacement field $\beta$. It is also shown that the
results obtaine... | [
{
"created": "Thu, 4 Jul 2002 07:26:04 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Iotemshi",
"I.",
""
],
[
"Singh",
"G. P.",
""
]
] | In this paper general solutions are found for domain walls in Lyra geometry in the plane symmetric spacetime metric given by Taub. Expressions for the energy density and pressure of domain walls are derived in both cases of uniform and time varying displacement field $\beta$. It is also shown that the results obtained ... |
2012.10237 | Jingkai Wang | Jingkai Wang | Multiple Rings in the Shadow of Extremely Compact Objects | 12 pages, 5 figures | null | 10.1142/S0218271821501121 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Event Horizon Telescope's image of the M87 black hole provides an
exciting opportunity to study black hole physics. Since a black hole's event
horizon absorbs all electromagnetic waves, it is difficult to actively probe
the horizon's existence. However, with the help of a family of extremely
compact, horizon-less... | [
{
"created": "Thu, 17 Dec 2020 00:37:30 GMT",
"version": "v1"
}
] | 2022-01-05 | [
[
"Wang",
"Jingkai",
""
]
] | The Event Horizon Telescope's image of the M87 black hole provides an exciting opportunity to study black hole physics. Since a black hole's event horizon absorbs all electromagnetic waves, it is difficult to actively probe the horizon's existence. However, with the help of a family of extremely compact, horizon-less o... |
1801.02001 | Nelson Christensen | Duo Tao, Nelson Christensen | Optimizing signal recycling for detecting a stochastic
gravitational-wave background | null | Classical and Quantum Gravity, Volume 35, Number 12, p. 125002
(2018) | 10.1088/1361-6382/aac148 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Signal recycling is applied in laser interferometers such as the Advanced
Laser Interferometer Gravitational-Wave Observatory (aLIGO) to increase their
sensitivity to gravitational waves. In this study, signal recycling
configurations for detecting a stochastic gravitational wave background are
optimized based on aLI... | [
{
"created": "Sat, 6 Jan 2018 10:47:55 GMT",
"version": "v1"
},
{
"created": "Thu, 24 May 2018 08:41:09 GMT",
"version": "v2"
}
] | 2018-05-25 | [
[
"Tao",
"Duo",
""
],
[
"Christensen",
"Nelson",
""
]
] | Signal recycling is applied in laser interferometers such as the Advanced Laser Interferometer Gravitational-Wave Observatory (aLIGO) to increase their sensitivity to gravitational waves. In this study, signal recycling configurations for detecting a stochastic gravitational wave background are optimized based on aLIGO... |
2302.04405 | Tayyab Naseer | M. Sharif, Tayyab Naseer | Extended Decoupled Anisotropic Solutions in
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\chi}\mathcal{T}^{\gamma\chi})$
Gravity | 28 pages, 8 figures | Int. J. Mod. Phys. D 31(2022)2240017 | 10.1142/S021827182240017X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider static spherical structure to develop some
anisotropic solutions by employing the extended gravitational decoupling scheme
in the background of
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\chi}\mathcal{T}^{\gamma\chi})$
gravity, where $\mathcal{R}$ and $\mathcal{T}$ indicate the Ricci sca... | [
{
"created": "Thu, 9 Feb 2023 02:18:25 GMT",
"version": "v1"
}
] | 2023-02-10 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"Tayyab",
""
]
] | In this paper, we consider static spherical structure to develop some anisotropic solutions by employing the extended gravitational decoupling scheme in the background of $f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\chi}\mathcal{T}^{\gamma\chi})$ gravity, where $\mathcal{R}$ and $\mathcal{T}$ indicate the Ricci scala... |
1212.0153 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Wormholes supported by a combination of normal and quintessential matter
in Einstein and Einstein-Maxwell gravity | 10 pages; two figures | Journal of Modern Physics, 4, 30 (2013) | 10.4236/jmp.2013.41006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown in the first part of this paper that a combined model comprising
ordinary and quintessential matter can support a traversable wormhole in
Einstein-Maxwell gravity. Since the solution allows zero tidal forces, the
wormhole is suitable for a humanoid traveler. The second part of the paper
shows that the ele... | [
{
"created": "Sat, 1 Dec 2012 20:10:37 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Feb 2013 00:47:03 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Jun 2013 15:45:22 GMT",
"version": "v3"
},
{
"created": "Sun, 2 Feb 2014 20:15:03 GMT",
"version": "v4"
}
] | 2014-02-04 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | It is shown in the first part of this paper that a combined model comprising ordinary and quintessential matter can support a traversable wormhole in Einstein-Maxwell gravity. Since the solution allows zero tidal forces, the wormhole is suitable for a humanoid traveler. The second part of the paper shows that the elect... |
2312.06772 | Flavio Tonioni | Gary Shiu, Flavio Tonioni, Hung V. Tran | Collapsing universe before time | 13 pages + appendices + references, 2 figures; v2: minor typos
corrected and refs. added | null | null | null | gr-qc astro-ph.CO hep-th math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we prove analytic bounds on the equation of state of a
cosmological fluid composed of an arbitrary number of canonical scalars
evolving in a negative multi-exponential potential. Because of the negative
energy, the universe is contracting and eventually undergoes a big crunch. A
contracting universe is ... | [
{
"created": "Mon, 11 Dec 2023 19:00:06 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2024 14:46:48 GMT",
"version": "v2"
}
] | 2024-05-31 | [
[
"Shiu",
"Gary",
""
],
[
"Tonioni",
"Flavio",
""
],
[
"Tran",
"Hung V.",
""
]
] | In this note, we prove analytic bounds on the equation of state of a cosmological fluid composed of an arbitrary number of canonical scalars evolving in a negative multi-exponential potential. Because of the negative energy, the universe is contracting and eventually undergoes a big crunch. A contracting universe is a ... |
1906.03140 | Marco Antonelli | Lorenzo Gavassino and Marco Antonelli | Thermodynamics of uncharged relativistic multifluids | 22 pages, preprint version (typos fixed and minor changes), comments
welcome | Classical and Quantum Gravity, Volume 37, Number 2 - Published 31
December 2019 | 10.1088/1361-6382/ab5f23 | INT-PUB-19-022 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The internal layers of neutron stars are expected to contain several
superfluid components that can significantly affect their dynamics. The
description of such objects should rely on hydrodynamic models in which it is
possible to unambiguously assign the value of the thermodynamic variables from
microscopic calculat... | [
{
"created": "Fri, 7 Jun 2019 14:55:38 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jun 2019 11:05:05 GMT",
"version": "v2"
}
] | 2020-01-14 | [
[
"Gavassino",
"Lorenzo",
""
],
[
"Antonelli",
"Marco",
""
]
] | The internal layers of neutron stars are expected to contain several superfluid components that can significantly affect their dynamics. The description of such objects should rely on hydrodynamic models in which it is possible to unambiguously assign the value of the thermodynamic variables from microscopic calculatio... |
gr-qc/0304106 | Jose Geraldo Pereira | R. Aldrovandi, J. G. Pereira and K. H. Vu | Gravitation without the equivalence principle | Latex, 11 pages, no figures. Minor presentation changes. Version to
appear in Gen. Rel. Grav. (2004) | Gen.Rel.Grav. 36 (2004) 101-110 | 10.1023/B:GERG.0000006696.98824.4d | null | gr-qc hep-th | null | In the general relativistic description of gravitation, geometry replaces the
concept of force. This is possible because of the universal character of free
fall, and would break down in its absence. On the other hand, the teleparallel
version of general relativity is a gauge theory for the translation group and,
as s... | [
{
"created": "Tue, 29 Apr 2003 18:32:08 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Aug 2003 13:50:54 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Aldrovandi",
"R.",
""
],
[
"Pereira",
"J. G.",
""
],
[
"Vu",
"K. H.",
""
]
] | In the general relativistic description of gravitation, geometry replaces the concept of force. This is possible because of the universal character of free fall, and would break down in its absence. On the other hand, the teleparallel version of general relativity is a gauge theory for the translation group and, as suc... |
1501.01355 | Edward Teo | Yu Chen, Yen-Kheng Lim, Edward Teo | A new form of the C-metric with cosmological constant | 37 pages, 7 figures, LaTeX; v2: minor changes, published version | Phys. Rev. D 91, 064014 (2015) | 10.1103/PhysRevD.91.064014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The new form of the C-metric proposed by Hong and Teo, in which the two
structure functions are factorised, has proved useful in its analysis. In this
paper, we extend this form to the case when a cosmological constant is present.
The new form of this solution has two structure functions which are partially
factorise... | [
{
"created": "Wed, 7 Jan 2015 02:56:36 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Feb 2015 12:03:24 GMT",
"version": "v2"
}
] | 2015-03-11 | [
[
"Chen",
"Yu",
""
],
[
"Lim",
"Yen-Kheng",
""
],
[
"Teo",
"Edward",
""
]
] | The new form of the C-metric proposed by Hong and Teo, in which the two structure functions are factorised, has proved useful in its analysis. In this paper, we extend this form to the case when a cosmological constant is present. The new form of this solution has two structure functions which are partially factorised;... |
1405.5219 | Justin Khoury | Justin Khoury, Godfrey E. J. Miller and Andrew J. Tolley | How General Relativity and Lorentz Covariance Arise from the Spatially
Covariant Effective Field Theory of the Transverse, Traceless Graviton | Essay received honorable mention in the Gravity Research Foundation
2014 essay competition. arXiv admin note: text overlap with arXiv:1305.0822 | null | 10.1142/S0218271814420127 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Traditional derivations of general relativity from the graviton degrees of
freedom assume space-time Lorentz covariance as an axiom. In this essay, we
survey recent evidence that general relativity is the unique
spatially-covariant effective field theory of the transverse, traceless
graviton degrees of freedom. The L... | [
{
"created": "Tue, 20 May 2014 20:00:20 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Khoury",
"Justin",
""
],
[
"Miller",
"Godfrey E. J.",
""
],
[
"Tolley",
"Andrew J.",
""
]
] | Traditional derivations of general relativity from the graviton degrees of freedom assume space-time Lorentz covariance as an axiom. In this essay, we survey recent evidence that general relativity is the unique spatially-covariant effective field theory of the transverse, traceless graviton degrees of freedom. The Lor... |
0709.0324 | Chi Wai Lai | Chi Wai Lai, Matthew W. Choptuik | Final Fate of Subcritical Evolutions of Boson Stars | 16 pages, 10 figures | null | null | AEI-2007-135 | gr-qc | null | We present results from a study of Type I critical phenomena in the dynamics
of general relativistic boson stars in spherical symmetry. The boson stars are
modelled with a minimally coupled, massive complex field (with no explicit
self-interaction), and are driven to the threshold of black hole formation via
their gr... | [
{
"created": "Tue, 4 Sep 2007 02:52:23 GMT",
"version": "v1"
}
] | 2007-09-05 | [
[
"Lai",
"Chi Wai",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | We present results from a study of Type I critical phenomena in the dynamics of general relativistic boson stars in spherical symmetry. The boson stars are modelled with a minimally coupled, massive complex field (with no explicit self-interaction), and are driven to the threshold of black hole formation via their grav... |
gr-qc/9711051 | Heller Michal | M. Heller, W. Sasin | Emergence of Time | 13 pages, latex, no figures | Phys.Lett.A250:48-54,1998 | 10.1016/S0375-9601(98)00824-X | CGC-94-04 | gr-qc | null | In the groupoid approach to noncommutative quantization of gravity,
gravitational field is quantized in terms of a C*-algebra A of complex valued
funcions on a groupoid G (with convolution as multiplication). In the
noncommutative quantum gravitational regime the concepts of space and time are
meaningless. We study t... | [
{
"created": "Mon, 17 Nov 1997 17:32:01 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Heller",
"M.",
""
],
[
"Sasin",
"W.",
""
]
] | In the groupoid approach to noncommutative quantization of gravity, gravitational field is quantized in terms of a C*-algebra A of complex valued funcions on a groupoid G (with convolution as multiplication). In the noncommutative quantum gravitational regime the concepts of space and time are meaningless. We study the... |
gr-qc/0503076 | Jose' P. S. Lemos | Alexander B. Balakin and Jos\'e P. S. Lemos | Non-minimal coupling for the gravitational and electromagnetic fields: A
general system of equations | 15 pages | Class.Quant.Grav. 22 (2005) 1867-1880 | 10.1088/0264-9381/22/9/024 | null | gr-qc astro-ph hep-th | null | We establish a new self-consistent system of equations for the gravitational
and electromagnetic fields. The procedure is based on a non-minimal non-linear
extension of the standard Einstein-Hilbert-Maxwell action. General properties
of a three-parameter family of non-minimal linear models are discussed. In
addition,... | [
{
"created": "Thu, 17 Mar 2005 18:23:40 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2005 18:28:18 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | We establish a new self-consistent system of equations for the gravitational and electromagnetic fields. The procedure is based on a non-minimal non-linear extension of the standard Einstein-Hilbert-Maxwell action. General properties of a three-parameter family of non-minimal linear models are discussed. In addition, w... |
gr-qc/0011027 | Mauricio Cataldo | M. Cataldo, S. del Campo and P. Salgado | Viscous cosmologies in scalar-tensor theories for Kasner type metrics | 6 pages, Latex, accepted in Phys. Rev. D | Phys.Rev. D63 (2001) 063503 | 10.1103/PhysRevD.63.063503 | null | gr-qc astro-ph hep-th | null | In a viscous Bianchi type I metric of the Kasner form, it is well known that
it is not possible to describe an anisotropic physical model of the universe,
which satisfies the second law of thermodynamics and the dominant energy
condition (DEC) in Einstein's theory of gravity. We examine this problem in
scalar-tensor ... | [
{
"created": "Tue, 7 Nov 2000 20:26:25 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cataldo",
"M.",
""
],
[
"del Campo",
"S.",
""
],
[
"Salgado",
"P.",
""
]
] | In a viscous Bianchi type I metric of the Kasner form, it is well known that it is not possible to describe an anisotropic physical model of the universe, which satisfies the second law of thermodynamics and the dominant energy condition (DEC) in Einstein's theory of gravity. We examine this problem in scalar-tensor th... |
1510.04030 | Edgardo Franzin | Mariano Cadoni, Edgardo Franzin, Salvatore Mignemi | Inflation as de Sitter instability | 11 pages, 4 figures. Matches published version | Eur. Phys. J. C76 (2016) 483 | 10.1140/epjc/s10052-016-4322-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological inflation generated by a scalar field slowly rolling
off from a de Sitter maximum of its potential. The models belong to the class
of hilltop models and represent the most general model of this kind in which
the scalar potential can be written as the sum of two exponentials. The
minimally cou... | [
{
"created": "Wed, 14 Oct 2015 10:14:57 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Oct 2015 12:46:29 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Sep 2016 08:46:55 GMT",
"version": "v3"
}
] | 2016-09-05 | [
[
"Cadoni",
"Mariano",
""
],
[
"Franzin",
"Edgardo",
""
],
[
"Mignemi",
"Salvatore",
""
]
] | We consider cosmological inflation generated by a scalar field slowly rolling off from a de Sitter maximum of its potential. The models belong to the class of hilltop models and represent the most general model of this kind in which the scalar potential can be written as the sum of two exponentials. The minimally coupl... |
gr-qc/0303030 | Parthasarathi Majumdar | Ashok Chatterjee and Parthasarathi Majumdar | Black hole entropy: quantum vs thermal fluctuations | 11 Pages Revtex, no figures | null | null | null | gr-qc | null | The relation between logarithmic corrections to the area law for black hole
entropy, due to thermal fluctuations around an equilibrium canonical ensemble,
and those originating from quantum spacetime fluctuations within a
microcanonical framework, is explored for three and four dimensional
asymptotically anti-de Sitt... | [
{
"created": "Fri, 7 Mar 2003 13:10:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chatterjee",
"Ashok",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | The relation between logarithmic corrections to the area law for black hole entropy, due to thermal fluctuations around an equilibrium canonical ensemble, and those originating from quantum spacetime fluctuations within a microcanonical framework, is explored for three and four dimensional asymptotically anti-de Sitter... |
2104.08442 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Imaging point sources with the gravitational lens of an extended Sun | 13 pages, 8 figures | Phys. Rev. D 104, 044032 (2021) | 10.1103/PhysRevD.104.044032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the optical properties of the solar gravitational lens (SGL) while
treating the Sun as an extended, axisymmetric and rotating body. The
gravitational field of the Sun is represented using a set of zonal harmonics.
We develop an analytical description of the intensity of light that is observed
in the image pl... | [
{
"created": "Sat, 17 Apr 2021 04:30:27 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Aug 2021 16:00:37 GMT",
"version": "v2"
}
] | 2021-08-16 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | We study the optical properties of the solar gravitational lens (SGL) while treating the Sun as an extended, axisymmetric and rotating body. The gravitational field of the Sun is represented using a set of zonal harmonics. We develop an analytical description of the intensity of light that is observed in the image plan... |
1507.02348 | Michel Miranda | Tonatiuh Matos and Galaxia Miranda | Exact Rotating Magnetic Traversable Wormholes satisfying the Energy
Conditions | null | Phys. Rev. D99, (2019), 124045 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we wonder if there is a way to generate a wormhole (WH) in
nature using "normal" matter. In order to give a first answer to this question,
we study a massless scalar field coupled to an electromagnetic one (dilatonic
field) with an arbitrary coupling constant, as source of gravitation. We obtain
an exact... | [
{
"created": "Thu, 9 Jul 2015 02:12:58 GMT",
"version": "v1"
}
] | 2021-02-09 | [
[
"Matos",
"Tonatiuh",
""
],
[
"Miranda",
"Galaxia",
""
]
] | In this work we wonder if there is a way to generate a wormhole (WH) in nature using "normal" matter. In order to give a first answer to this question, we study a massless scalar field coupled to an electromagnetic one (dilatonic field) with an arbitrary coupling constant, as source of gravitation. We obtain an exact s... |
1310.2303 | James Dilts | James Dilts | The Einstein Constraint Equations on Compact Manifolds with Boundary | 34 pages. arXiv admin note: text overlap with arXiv:1306.1801 by
other authors | null | 10.1088/0264-9381/31/12/125009 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue the study of the Einstein constraint equations on compact
manifolds with boundary initiated by Holst and Tsogtgerel. In particular, we
consider the full system and prove existence of solutions in both the near-CMC
and far-from-CMC (for Yamabe positive metrics) cases. We also make partial
progress in provi... | [
{
"created": "Tue, 8 Oct 2013 23:12:35 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Nov 2013 22:46:25 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Feb 2014 17:35:37 GMT",
"version": "v3"
}
] | 2015-06-17 | [
[
"Dilts",
"James",
""
]
] | We continue the study of the Einstein constraint equations on compact manifolds with boundary initiated by Holst and Tsogtgerel. In particular, we consider the full system and prove existence of solutions in both the near-CMC and far-from-CMC (for Yamabe positive metrics) cases. We also make partial progress in proving... |
1608.04014 | Burin Gumjudpai | Narakorn Kaewkhao (IF Naresuan) and Burin Gumjudpai (IF Naresuan) | Cosmology of non-minimal derivative coupling to gravity in Palatini
formalism and its chaotic inflation | 12 pages, no figures, chaotic inflation potential section and
appendices added, minor correction on Planck unit | Physics of the Dark Universe 20 (2018) 20 | 10.1016/j.dark.2018.02.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider, in Palatini formalism, a modified gravity of which the scalar
field derivative couples to Einstein tensor. In this scenario, Ricci scalar,
Ricci tensor and Einstein tensor are functions of connection field. As a
result, the connection field gives rise to relation, $h_{\mu\nu} = f
g_{\mu\nu}$ between effe... | [
{
"created": "Sat, 13 Aug 2016 18:35:06 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Mar 2017 16:08:17 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Jul 2017 10:17:29 GMT",
"version": "v3"
},
{
"created": "Thu, 1 Mar 2018 17:47:09 GMT",
"version": "v4"
},
{
"cr... | 2018-03-20 | [
[
"Kaewkhao",
"Narakorn",
"",
"IF Naresuan"
],
[
"Gumjudpai",
"Burin",
"",
"IF Naresuan"
]
] | We consider, in Palatini formalism, a modified gravity of which the scalar field derivative couples to Einstein tensor. In this scenario, Ricci scalar, Ricci tensor and Einstein tensor are functions of connection field. As a result, the connection field gives rise to relation, $h_{\mu\nu} = f g_{\mu\nu}$ between effect... |
2111.04489 | Siyuan Ma | Siyuan Ma, Lin Zhang | Sharp decay for Teukolsky equation in Kerr spacetimes | The published version | Commun. Math. Phys. 401, 333-434 (2023) | 10.1007/s00220-023-04640-w | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | In this work, we derive the global sharp decay, as both a lower and an upper
bounds, for the spin $\pm \mathfrak{s}$ components, which are solutions to the
Teukolsky equation, in the black hole exterior and on the event horizon of a
slowly rotating Kerr spacetime. These estimates are generalized to any
subextreme Ker... | [
{
"created": "Mon, 8 Nov 2021 13:25:23 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Nov 2021 15:49:20 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Jul 2023 02:43:04 GMT",
"version": "v3"
}
] | 2023-07-06 | [
[
"Ma",
"Siyuan",
""
],
[
"Zhang",
"Lin",
""
]
] | In this work, we derive the global sharp decay, as both a lower and an upper bounds, for the spin $\pm \mathfrak{s}$ components, which are solutions to the Teukolsky equation, in the black hole exterior and on the event horizon of a slowly rotating Kerr spacetime. These estimates are generalized to any subextreme Kerr ... |
2002.03630 | Avijit Chowdhury | Avijit Chowdhury and Narayan Banerjee | Greybody factor and sparsity of Hawking radiation from a charged
spherical black hole with scalar hair | Version accepted for publication in PLB | Phys. Lett. B 805, 135417 (2020) | 10.1016/j.physletb.2020.135417 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The `no-hair' conjecture claims that for a spherically symmetric black hole,
only the information regarding the mass and charge of the black hole is
available to an external observer. However, there are numerous counterexamples
to the `no-hair' conjecture. In this work, we consider a particular
counter-example to the... | [
{
"created": "Mon, 10 Feb 2020 10:14:19 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Apr 2020 09:38:54 GMT",
"version": "v2"
}
] | 2020-04-20 | [
[
"Chowdhury",
"Avijit",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The `no-hair' conjecture claims that for a spherically symmetric black hole, only the information regarding the mass and charge of the black hole is available to an external observer. However, there are numerous counterexamples to the `no-hair' conjecture. In this work, we consider a particular counter-example to the `... |
gr-qc/0212105 | Kostas Kokkotas | K.D.Kokkotas and J.Ruoff | Instabilities of Relativistic Stars | 41 pages, 12 figures, Proceedings of the 25th John Hopkins Workshop,
Florence | null | 10.1142/9789812791368_0019 | null | gr-qc astro-ph | null | Recent developments on the rotational instabilities of relativistic stars are
reviewed. The article provides an account of the theory of stellar
instabilities with emphasis on the rotational ones. Special attention is being
paid to the study of these instabilities in the general relativistic regime.
Issues such as th... | [
{
"created": "Thu, 26 Dec 2002 01:44:54 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Kokkotas",
"K. D.",
""
],
[
"Ruoff",
"J.",
""
]
] | Recent developments on the rotational instabilities of relativistic stars are reviewed. The article provides an account of the theory of stellar instabilities with emphasis on the rotational ones. Special attention is being paid to the study of these instabilities in the general relativistic regime. Issues such as the ... |
gr-qc/9404063 | Andrew Barvinski | A.O.Barvinsky, Yu.V.Gusev, G.A.Vilkovisky and V.V.Zhytnikov | Asymptotic behaviours of the heat kernel in covariant perturbation
theory | 22 pages, REVTeX, Alberta Thy 45-93 | J.Math.Phys. 35 (1994) 3543-3559 | 10.1063/1.530428 | null | gr-qc | null | The trace of the heat kernel is expanded in a basis of nonlocal curvature
invariants of $N$th order. The coefficients of this expansion (the nonlocal
form factors) are calculated to third order in the curvature inclusive. The
early-time and late-time asymptotic behaviours of the trace of the heat kernel
are presented... | [
{
"created": "Fri, 29 Apr 1994 22:29:02 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Barvinsky",
"A. O.",
""
],
[
"Gusev",
"Yu. V.",
""
],
[
"Vilkovisky",
"G. A.",
""
],
[
"Zhytnikov",
"V. V.",
""
]
] | The trace of the heat kernel is expanded in a basis of nonlocal curvature invariants of $N$th order. The coefficients of this expansion (the nonlocal form factors) are calculated to third order in the curvature inclusive. The early-time and late-time asymptotic behaviours of the trace of the heat kernel are presented w... |
1812.03551 | Masato Minamitsuji | Masato Minamitsuji and Taishi Ikeda | Scalarized black holes in the presence of the coupling to Gauss-Bonnet
gravity | 25 pages, 13 figures, references added, published version | Phys. Rev. D 99, 044017 (2019) | 10.1103/PhysRevD.99.044017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study static and spherically symmetric black hole (BH)
solutions in the scalar-tensor theories with the coupling of the scalar field
to the Gauss-Bonnet (GB) term $\xi (\phi) R_{\rm GB}$, where $R_{\rm
GB}:=R^2-4R^{\alpha\beta}R_{\alpha\beta}+R^{\alpha\beta\mu\nu}R_{\alpha\beta\mu\nu}$
is the GB inv... | [
{
"created": "Sun, 9 Dec 2018 19:49:06 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2019 19:57:29 GMT",
"version": "v2"
}
] | 2019-02-14 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Ikeda",
"Taishi",
""
]
] | In this paper, we study static and spherically symmetric black hole (BH) solutions in the scalar-tensor theories with the coupling of the scalar field to the Gauss-Bonnet (GB) term $\xi (\phi) R_{\rm GB}$, where $R_{\rm GB}:=R^2-4R^{\alpha\beta}R_{\alpha\beta}+R^{\alpha\beta\mu\nu}R_{\alpha\beta\mu\nu}$ is the GB invar... |
gr-qc/0603127 | Alex Nielsen | Alex B. Nielsen | Skyrme Black Holes in the Isolated Horizons Formalism | Full journal version, 6 pages, 5 figures | Phys.Rev.D74:044038,2006 | 10.1103/PhysRevD.74.044038 | null | gr-qc | null | We study static, spherically symmetric, Skyrme black holes in the context of
the assumption that they can be viewed as bound states between ordinary bare
black holes and solitons. This assumption and results stemming from the
isolated horizons formalism lead to several conjectures about the static black
hole solution... | [
{
"created": "Fri, 31 Mar 2006 05:20:10 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2006 00:13:23 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Nielsen",
"Alex B.",
""
]
] | We study static, spherically symmetric, Skyrme black holes in the context of the assumption that they can be viewed as bound states between ordinary bare black holes and solitons. This assumption and results stemming from the isolated horizons formalism lead to several conjectures about the static black hole solutions.... |
gr-qc/9604040 | R. Beig, Univ. Wien. | R.Beig (Institut f\"ur Theoretische Physik, Universit\"at Wien) Piotr
T. Chrusciel (Departement de Mathematique Faculte des Sciences Tours) | Killing Initial Data | 17 pages | Class.Quant.Grav.14:A83-A92,1997 | 10.1088/0264-9381/14/1A/007 | null | gr-qc | null | We study space-time Killing vectors in terms of their "lapse and shift"
relative to some spacelike slice. We give a necessary and sufficient condition
in order for these lapse-shift pairs, which we call Killing initial data
(KID'S), to form a Lie algebra under the bracket operation induced by the Lie
commutator of ve... | [
{
"created": "Mon, 22 Apr 1996 14:01:26 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Beig",
"R.",
"",
"Institut für Theoretische Physik, Universität Wien"
],
[
"Chrusciel",
"Piotr T.",
"",
"Departement de Mathematique Faculte des Sciences Tours"
]
] | We study space-time Killing vectors in terms of their "lapse and shift" relative to some spacelike slice. We give a necessary and sufficient condition in order for these lapse-shift pairs, which we call Killing initial data (KID'S), to form a Lie algebra under the bracket operation induced by the Lie commutator of vect... |
gr-qc/9511051 | Antonio Lopez Pinto | A.Lopez-Pinto, A.Tiemblo and R.Tresguerres | Non-Linear Affine Embedding of the Dirac Field from the
Multiplicity-Free SL(4,R) Unirreps | 13 pages, plain TeX, macros included | Class.Quant.Grav. 13 (1996) 2255-2266 | 10.1088/0264-9381/13/8/018 | preprint IMAFF 95/9 | gr-qc hep-th | null | The correspondence between the linear multiplicity-free unirreps of SL(4, R)
studied by Ne'eman and {\~{S}}ija{\~{c}}ki and the non-linear realizations of
the affine group is worked out. The results obtained clarify the inclusion of
spinorial fields in a non-linear affine gauge theory of gravitation.
| [
{
"created": "Fri, 17 Nov 1995 16:15:47 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Lopez-Pinto",
"A.",
""
],
[
"Tiemblo",
"A.",
""
],
[
"Tresguerres",
"R.",
""
]
] | The correspondence between the linear multiplicity-free unirreps of SL(4, R) studied by Ne'eman and {\~{S}}ija{\~{c}}ki and the non-linear realizations of the affine group is worked out. The results obtained clarify the inclusion of spinorial fields in a non-linear affine gauge theory of gravitation. |
0808.3005 | Dinesh Singh | Dinesh Singh | Perturbation Method for Classical Spinning Particle Motion: I. Kerr
Space-Time | 23 pages; REVTeX file; 9 figures; Accepted for publication in Phys.
Rev. D | Phys.Rev.D78:104028,2008 | 10.1103/PhysRevD.78.104028 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents an analytic perturbation approach to the dynamics of a
classical spinning particle, according to the Mathisson-Papapetrou-Dixon (MPD)
equations of motion, with a direct application to circular motion around a Kerr
black hole. The formalism is established in terms of a power series expansion
with r... | [
{
"created": "Fri, 22 Aug 2008 19:32:23 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Oct 2008 14:50:30 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Singh",
"Dinesh",
""
]
] | This paper presents an analytic perturbation approach to the dynamics of a classical spinning particle, according to the Mathisson-Papapetrou-Dixon (MPD) equations of motion, with a direct application to circular motion around a Kerr black hole. The formalism is established in terms of a power series expansion with res... |
2205.01667 | Francisco M. Blanco | Francisco M. Blanco and \'Eanna \'E. Flanagan | Particle motion under the conservative piece of the self-force is
Hamiltonian | 6 pages | null | 10.1103/PhysRevLett.130.051201 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We consider the motion of a point particle in a stationary spacetime under
the influence of a scalar, electromagnetic or gravitational self-force. We show
that the conservative piece of the first-order self-force gives rise to
Hamiltonian dynamics, and we derive an explicit expression for the Hamiltonian
on phase spa... | [
{
"created": "Tue, 3 May 2022 17:57:19 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Blanco",
"Francisco M.",
""
],
[
"Flanagan",
"Éanna É.",
""
]
] | We consider the motion of a point particle in a stationary spacetime under the influence of a scalar, electromagnetic or gravitational self-force. We show that the conservative piece of the first-order self-force gives rise to Hamiltonian dynamics, and we derive an explicit expression for the Hamiltonian on phase space... |
1311.3153 | Jeffrey Hazboun | Jeffrey S. Hazboun, Manuel Pichardo Marcano and Shane L. Larson | Limiting alternative theories of gravity using gravitational wave
observations across the spectrum | Now covers test using interferometers and PTA's 20 pages, 6 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The advent of gravitational wave astronomy provides new proving grounds for
testing theories of gravity. Recent work has reinvigorated the study of
bimetric theories of gravity and massive gravity theories. One of the most
interesting predictions of these theories, as well as some string theories, is
the subluminal s... | [
{
"created": "Wed, 13 Nov 2013 14:58:13 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Nov 2014 05:10:31 GMT",
"version": "v2"
}
] | 2014-11-14 | [
[
"Hazboun",
"Jeffrey S.",
""
],
[
"Marcano",
"Manuel Pichardo",
""
],
[
"Larson",
"Shane L.",
""
]
] | The advent of gravitational wave astronomy provides new proving grounds for testing theories of gravity. Recent work has reinvigorated the study of bimetric theories of gravity and massive gravity theories. One of the most interesting predictions of these theories, as well as some string theories, is the subluminal spe... |
2204.01972 | Tousif Islam | Tousif Islam, Scott E. Field, Scott A. Hughes, Gaurav Khanna, Vijay
Varma, Matthew Giesler, Mark A. Scheel, Lawrence E. Kidder and Harald P.
Pfeiffer | Surrogate model for gravitational wave signals from non-spinning,
comparable- to large-mass-ratio black hole binaries built on black hole
perturbation theory waveforms calibrated to numerical relativity | 20 pages, 15 figures | null | 10.1103/PhysRevD.106.104025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a reduced-order surrogate model of gravitational waveforms from
non-spinning binary black hole systems with comparable to large mass-ratio
configurations. This surrogate model, \texttt{BHPTNRSur1dq1e4}, is trained on
waveform data generated by point-particle black hole perturbation theory
(ppBHPT) with mas... | [
{
"created": "Tue, 5 Apr 2022 03:55:25 GMT",
"version": "v1"
}
] | 2022-11-23 | [
[
"Islam",
"Tousif",
""
],
[
"Field",
"Scott E.",
""
],
[
"Hughes",
"Scott A.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Varma",
"Vijay",
""
],
[
"Giesler",
"Matthew",
""
],
[
"Scheel",
"Mark A.",
""
],
[
... | We present a reduced-order surrogate model of gravitational waveforms from non-spinning binary black hole systems with comparable to large mass-ratio configurations. This surrogate model, \texttt{BHPTNRSur1dq1e4}, is trained on waveform data generated by point-particle black hole perturbation theory (ppBHPT) with mass ... |
2111.10877 | Ruslan Muharlyamov | Ruslan K. Muharlyamov and Tatiana N. Pankratyeva | Reconstruction in the Horndeski theory within the scope of the Bianchi I
cosmology | null | Modern Physics Letters A, 2250108 (2022) | 10.1142/S0217732322501085 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the previous article Eur. Phys. J. Plus 136, 590 (2021) (arXiv:
2110.15396) we have proposed a reconstruction method for the kinetic gravity
braiding theory in the framework of the flat Friedman-Robertson-Walker
spacetime. Here we develop this method in the Bianchi I spacetime model for a
subclass of the Horndeski... | [
{
"created": "Sun, 21 Nov 2021 18:52:55 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2021 16:38:55 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Nov 2021 06:50:13 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Feb 2022 15:15:06 GMT",
"version": "v4"
}
] | 2022-07-05 | [
[
"Muharlyamov",
"Ruslan K.",
""
],
[
"Pankratyeva",
"Tatiana N.",
""
]
] | In the previous article Eur. Phys. J. Plus 136, 590 (2021) (arXiv: 2110.15396) we have proposed a reconstruction method for the kinetic gravity braiding theory in the framework of the flat Friedman-Robertson-Walker spacetime. Here we develop this method in the Bianchi I spacetime model for a subclass of the Horndeski t... |
gr-qc/0311005 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla | Novel results on trapped surfaces | 8 pages, no figures. Contribution to the conference "Mathematics of
Gravitation II", Warsaw, September 1-9, 2003 | https://www.impan.pl/BC/Arch/2003/Gravitation/ConfProc/ (A
Kr\'olak and K Borkowski eds, 2003) | null | null | gr-qc | null | A unifying definition of trapped submanifold for arbitrary codimension by
means of its mean curvature vector is presented. Then, the interplay between
(generalized) symmetries and trapped submanifolds is studied, proving in
particular that (i) stationary spacetimes cannot contain closed trapped nor
marginally trapped... | [
{
"created": "Mon, 3 Nov 2003 12:37:51 GMT",
"version": "v1"
}
] | 2019-06-25 | [
[
"Senovilla",
"José M. M.",
""
]
] | A unifying definition of trapped submanifold for arbitrary codimension by means of its mean curvature vector is presented. Then, the interplay between (generalized) symmetries and trapped submanifolds is studied, proving in particular that (i) stationary spacetimes cannot contain closed trapped nor marginally trapped s... |
1903.00223 | Marcus Werner | Gary W. Gibbons, Marcus C. Werner | The gravitational magnetoelectric effect | 13 pages | null | null | YITP-19-13 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetism in spacetime can be treated in terms of an analogue linear
dielectric medium. In this paper, we discuss the gravitational analogue of the
linear magnetoelectric effect, which can be found in multiferroic materials.
While this is known to occur for metrics with non-zero mixed components, we
show how i... | [
{
"created": "Fri, 1 Mar 2019 09:42:26 GMT",
"version": "v1"
}
] | 2019-03-04 | [
[
"Gibbons",
"Gary W.",
""
],
[
"Werner",
"Marcus C.",
""
]
] | Electromagnetism in spacetime can be treated in terms of an analogue linear dielectric medium. In this paper, we discuss the gravitational analogue of the linear magnetoelectric effect, which can be found in multiferroic materials. While this is known to occur for metrics with non-zero mixed components, we show how it ... |
1503.04402 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev and Vladimir Folomeev | Modeling a nonperturbative spinor vacuum interacting with a strong
gravitational wave | 9 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the propagation of strong gravitational waves interacting with a
nonperturbative vacuum of spinor fields. To described the latter, we suggest an
approximate model. The corresponding Einstein equation has the form of the
Schr\"odinger equation. Its gravitational-wave solution is analogous to the
solution o... | [
{
"created": "Sun, 15 Mar 2015 09:14:43 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | We consider the propagation of strong gravitational waves interacting with a nonperturbative vacuum of spinor fields. To described the latter, we suggest an approximate model. The corresponding Einstein equation has the form of the Schr\"odinger equation. Its gravitational-wave solution is analogous to the solution of ... |
1703.07510 | Rashmi Uniyal | Rashmi Uniyal, Hemwati Nandan K. D. Purohit | Null Geodesics and Observables around Kerr-Sen Black Hole | null | Class.Quant.Grav. 35 (2018) no.2, 025003 | 10.1088/1361-6382/aa9ad9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the geodesic motion in the background of Kerr-Sen Black Hole
arising in the heterotic string theory. The nature of effective potential is
discussed in radial as well as latitudinal direction. A special class of
spherical photon orbits is obtained along with the expression for the turning
point for radi... | [
{
"created": "Wed, 22 Mar 2017 04:19:20 GMT",
"version": "v1"
}
] | 2018-01-30 | [
[
"Uniyal",
"Rashmi",
""
],
[
"Purohit",
"Hemwati Nandan K. D.",
""
]
] | We investigate the geodesic motion in the background of Kerr-Sen Black Hole arising in the heterotic string theory. The nature of effective potential is discussed in radial as well as latitudinal direction. A special class of spherical photon orbits is obtained along with the expression for the turning point for radial... |
1401.3789 | Tim-Torben Paetz | Piotr T. Chru\'sciel, Tim-Torben Paetz | The mass of light-cones | 11 pages, short section added where the Bondi mass of space-times
containing white hole regions is considered, this version corresponds to the
one published in CQG | Class. Quantum Grav. 31 (2014) 102001 | 10.1088/0264-9381/31/10/102001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give an elementary proof of positivity of total gravitational energy in
space-times containing complete smooth light-cones.
| [
{
"created": "Wed, 15 Jan 2014 23:28:51 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jun 2014 16:02:54 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Paetz",
"Tim-Torben",
""
]
] | We give an elementary proof of positivity of total gravitational energy in space-times containing complete smooth light-cones. |
1109.5023 | Marcin Kisielowski M.Sc. | Wojciech Kaminski, Marcin Kisielowski, Jerzy Lewandowski | The kernel and the injectivity of the EPRL map | 17 pages, 3 figures | null | 10.1088/0264-9381/29/8/085001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove injectivity of the EPRL map for |\gamma|<1, filling
the gap of our previous paper.
| [
{
"created": "Fri, 23 Sep 2011 09:21:41 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Kaminski",
"Wojciech",
""
],
[
"Kisielowski",
"Marcin",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | In this paper we prove injectivity of the EPRL map for |\gamma|<1, filling the gap of our previous paper. |
2103.00330 | Branislav Cvetkovi\'c | Milutin Blagojevi\'c and Branislav Cvetkovi\'c | Thermodynamics of Riemannian Kerr-AdS black holes in Poincar\'e gauge
theory | LaTex, 10 pages | null | 10.1016/j.physletb.2021.136242 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Hamiltonian approach to black hole entropy is used to study Riemannian
Kerr-AdS solutions in the general, parity-violating Poincar\'e gauge theory.
Entropy and the asymptotic charges are entirely determined by the parity-even
sector of the theory, whereas the parity-odd contributions vanish. Entropy is
found to be ... | [
{
"created": "Sat, 27 Feb 2021 21:31:52 GMT",
"version": "v1"
}
] | 2021-03-31 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
]
] | A Hamiltonian approach to black hole entropy is used to study Riemannian Kerr-AdS solutions in the general, parity-violating Poincar\'e gauge theory. Entropy and the asymptotic charges are entirely determined by the parity-even sector of the theory, whereas the parity-odd contributions vanish. Entropy is found to be pr... |
1407.1391 | Luis J. Garay | Carlos Barcel\'o, Ra\'ul Carballo-Rubio, Luis J. Garay | Mutiny at the white-hole district | 8 pages, 1 figure. Essay awarded a honorable mention in the 2014
Gravity Research Foundation essay competition | International Journal of Modern Physics D Vol. 23, No. 12 (2014)
1442022 (6 pages) | 10.1142/S021827181442022X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The white-hole sector of Kruskal's solution is almost never used in physical
applications. However, it might contain the solution to many of the problems
associated with gravitational collapse and evaporation. This essay tries to
draw attention to some bouncing geometries that make a democratic use of the
black- and ... | [
{
"created": "Sat, 5 Jul 2014 11:16:06 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Barceló",
"Carlos",
""
],
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Garay",
"Luis J.",
""
]
] | The white-hole sector of Kruskal's solution is almost never used in physical applications. However, it might contain the solution to many of the problems associated with gravitational collapse and evaporation. This essay tries to draw attention to some bouncing geometries that make a democratic use of the black- and wh... |
1306.6582 | Edward Wilson-Ewing | Edward Wilson-Ewing | Ekpyrotic loop quantum cosmology | 11 pages, v2: Clarifications and references added | JCAP 1308:015,2013 | 10.1088/1475-7516/2013/08/015 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the ekpyrotic paradigm in the context of loop quantum cosmology.
In loop quantum cosmology the classical big-bang singularity is resolved due to
quantum gravity effects, and so the contracting ekpyrotic branch of the
universe and its later expanding phase are connected by a smooth bounce. Thus,
it is poss... | [
{
"created": "Thu, 27 Jun 2013 17:36:06 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2013 16:27:19 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Wilson-Ewing",
"Edward",
""
]
] | We consider the ekpyrotic paradigm in the context of loop quantum cosmology. In loop quantum cosmology the classical big-bang singularity is resolved due to quantum gravity effects, and so the contracting ekpyrotic branch of the universe and its later expanding phase are connected by a smooth bounce. Thus, it is possib... |
0904.3686 | Salvatore Capozziello | S. Capozziello and S. Vignolo | The Cauchy problem for metric-affine f(R)-gravity in presence of
perfect-fluid matter | 8 pages | Class.Quant.Grav.26:175013,2009 | 10.1088/0264-9381/26/17/175013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Cauchy problem for metric-affine f(R)-gravity `a la Palatini and with
torsion, in presence of perfect fluid matter acting as source, is discussed
following the well-known Bruhat prescriptions for General Relativity. The
problem results well-formulated and well-posed when the perfect-fluid form of
the stress-energ... | [
{
"created": "Thu, 23 Apr 2009 13:13:23 GMT",
"version": "v1"
}
] | 2009-08-24 | [
[
"Capozziello",
"S.",
""
],
[
"Vignolo",
"S.",
""
]
] | The Cauchy problem for metric-affine f(R)-gravity `a la Palatini and with torsion, in presence of perfect fluid matter acting as source, is discussed following the well-known Bruhat prescriptions for General Relativity. The problem results well-formulated and well-posed when the perfect-fluid form of the stress-energy ... |
1102.1682 | Babak Vakili | Babak Vakili | Quantization of the Schwarzschild black hole: a Noether symmetry
approach | 11 pages, no figures, revised version | Int. J. Theor. Phys. 51 (2012) 133 | 10.1007/s10773-011-0887-7 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the canonical formalism of a spherically symmetric space-time. In
the context of the 3+1 decomposition with respect to the radial coordinate $r$,
we set up an effective Lagrangian in which a couple of metric functions play
the role of independent variables. We show that the resulting $r$-Hamiltonian
yields t... | [
{
"created": "Tue, 8 Feb 2011 18:43:39 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jul 2011 14:58:02 GMT",
"version": "v2"
}
] | 2011-12-30 | [
[
"Vakili",
"Babak",
""
]
] | We study the canonical formalism of a spherically symmetric space-time. In the context of the 3+1 decomposition with respect to the radial coordinate $r$, we set up an effective Lagrangian in which a couple of metric functions play the role of independent variables. We show that the resulting $r$-Hamiltonian yields the... |
2012.13193 | Buddhadeb Ghosh | Arunoday Sarkar, Chitrak Sarkar and Buddhadeb Ghosh | Mode analysis of cosmological perturbations with the $E$-model
$\alpha$-attractor inflaton potentials | 12 figures, 14 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We have carried out detailed $k$-mode analysis of single-inflaton slow-roll
inflationary perturbations including quantum fluctuations by setting up
non-linear coupled differential equations of inflaton field ($\phi$), its
perturbation ($\delta\phi$) and the metric perturbation (the Bardeen potential,
$\Phi_B$), and c... | [
{
"created": "Thu, 24 Dec 2020 10:46:14 GMT",
"version": "v1"
}
] | 2020-12-25 | [
[
"Sarkar",
"Arunoday",
""
],
[
"Sarkar",
"Chitrak",
""
],
[
"Ghosh",
"Buddhadeb",
""
]
] | We have carried out detailed $k$-mode analysis of single-inflaton slow-roll inflationary perturbations including quantum fluctuations by setting up non-linear coupled differential equations of inflaton field ($\phi$), its perturbation ($\delta\phi$) and the metric perturbation (the Bardeen potential, $\Phi_B$), and cal... |
2305.15674 | Zheng-Wen Long | Meng-Yao Zhang, Hao Chen, Hassan Hassanabadi, Zheng-Wen Long, and Hui
Yang | Topology of nonlinearly charged black hole chemistry via massive gravity | 16 pages,22 figures | European Physical Journal C (2023) | 10.1140/epjc/s10052-023-11933-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The classification of critical points of charged topological black holes
(TBHs) in anti-de Sitter spacetime (AdS) under the Power Maxwell Invariant
(PMI)-massive gravity is accomplished within the framework of black hole
chemistry (BHC). Considering the grand canonical ensemble (GCE), we show that
$d=4$ black hole ha... | [
{
"created": "Thu, 25 May 2023 02:57:15 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2023 13:07:39 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Aug 2023 07:28:46 GMT",
"version": "v3"
},
{
"created": "Sun, 3 Sep 2023 01:50:28 GMT",
"version": "v4"
}
] | 2023-09-06 | [
[
"Zhang",
"Meng-Yao",
""
],
[
"Chen",
"Hao",
""
],
[
"Hassanabadi",
"Hassan",
""
],
[
"Long",
"Zheng-Wen",
""
],
[
"Yang",
"Hui",
""
]
] | The classification of critical points of charged topological black holes (TBHs) in anti-de Sitter spacetime (AdS) under the Power Maxwell Invariant (PMI)-massive gravity is accomplished within the framework of black hole chemistry (BHC). Considering the grand canonical ensemble (GCE), we show that $d=4$ black hole have... |
2403.02362 | Yu Hao | Hao Yu, Zi-Chao Lin, Jin Li | Holographic entropy bound and a special class of spatial systems in
cosmology | 14 pages; comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic entropy bound is discussed in cosmology. We try to define a
special class of spatial systems in cosmology, inside which the entropy of
matter satisfies the holographic entropy bound throughout the evolution of the
universe. We first take a universe composed of black holes as an example and
demonstrate... | [
{
"created": "Mon, 4 Mar 2024 07:36:31 GMT",
"version": "v1"
}
] | 2024-03-06 | [
[
"Yu",
"Hao",
""
],
[
"Lin",
"Zi-Chao",
""
],
[
"Li",
"Jin",
""
]
] | The holographic entropy bound is discussed in cosmology. We try to define a special class of spatial systems in cosmology, inside which the entropy of matter satisfies the holographic entropy bound throughout the evolution of the universe. We first take a universe composed of black holes as an example and demonstrate t... |
1605.02430 | Dmitry Shogin | Dmitry Shogin and Per Amund Amundsen | On Radiative Fluids in Anisotropic Spacetimes | 13 pages, no figures | null | null | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the second-order Israel-Stewart theory of relativistic fluid- and
thermodynamics to a physically realistic model of a radiative fluid in a simple
anisotropic cosmological background. We investigate the asymptotic future of
the resulting cosmological model and review the role of the dissipative
phenomena in t... | [
{
"created": "Mon, 9 May 2016 06:45:10 GMT",
"version": "v1"
}
] | 2016-05-10 | [
[
"Shogin",
"Dmitry",
""
],
[
"Amundsen",
"Per Amund",
""
]
] | We apply the second-order Israel-Stewart theory of relativistic fluid- and thermodynamics to a physically realistic model of a radiative fluid in a simple anisotropic cosmological background. We investigate the asymptotic future of the resulting cosmological model and review the role of the dissipative phenomena in the... |
1408.6754 | Josep M. Pons | Josep M. Pons and Naresh Dadhich | On static black holes solutions in Einstein and Einstein-Gauss-Bonnet
gravity with topology ${\bf SO(n) \times SO(n)}$ | 22 pages, 2 figures. Relevant references added and changes made
accordingly | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static black hole solutions in Einstein and Einstein-Gauss-Bonnet
gravity with product two-spheres topology, ${\bf SO(n) \times SO(n)}$, in
higher dimensions. There is an unusual new feature of Gauss-Bonnet black hole
that the avoidance of non-central naked singularity prescribes a mass range for
black hole ... | [
{
"created": "Thu, 28 Aug 2014 15:33:22 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Dec 2014 08:11:02 GMT",
"version": "v2"
}
] | 2014-12-22 | [
[
"Pons",
"Josep M.",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We study static black hole solutions in Einstein and Einstein-Gauss-Bonnet gravity with product two-spheres topology, ${\bf SO(n) \times SO(n)}$, in higher dimensions. There is an unusual new feature of Gauss-Bonnet black hole that the avoidance of non-central naked singularity prescribes a mass range for black hole in... |
gr-qc/9609017 | Dario Nunez | Bahram Mashhoon, James C. McClune, Enrique Chavez and Hernando Quevedo | On the Energy of Rotating Gravitational Waves | Plain tex, 22 pages, 2 figures | null | null | null | gr-qc | null | A class of solutions of the gravitational field equations describing vacuum
spacetimes outside rotating cylindrical sources is presented. A subclass of
these solutions corresponds to the exterior gravitational fields of rotating
cylindrical systems that emit gravitational radiation. The properties of these
rotating g... | [
{
"created": "Fri, 6 Sep 1996 21:32:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashhoon",
"Bahram",
""
],
[
"McClune",
"James C.",
""
],
[
"Chavez",
"Enrique",
""
],
[
"Quevedo",
"Hernando",
""
]
] | A class of solutions of the gravitational field equations describing vacuum spacetimes outside rotating cylindrical sources is presented. A subclass of these solutions corresponds to the exterior gravitational fields of rotating cylindrical systems that emit gravitational radiation. The properties of these rotating gra... |
gr-qc/0312105 | Gianluca Cruciani | Donato Bini, Christian Cherubini, Gianluca Cruciani and Andrea Lunari | Neutrino current in a gravitational plane wave collision background | 17 pages, 6 Postscript figures, accepted by International Journal of
Modern Physics D | Int.J.Mod.Phys. D12 (2003) 1983-2000 | 10.1142/S0218271803003876 | null | gr-qc | null | The behaviour of a massless Dirac field on a general spacetime background
representing two colliding gravitational plane waves is discussed in the
Newman-Penrose formalism. The geometrical properties of the neutrino current
are analysed and explicit results are given for the special Ferrari-Ibanez
solution.
| [
{
"created": "Tue, 23 Dec 2003 18:12:47 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Dec 2003 10:42:28 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Cruciani",
"Gianluca",
""
],
[
"Lunari",
"Andrea",
""
]
] | The behaviour of a massless Dirac field on a general spacetime background representing two colliding gravitational plane waves is discussed in the Newman-Penrose formalism. The geometrical properties of the neutrino current are analysed and explicit results are given for the special Ferrari-Ibanez solution. |
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