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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9611006 | Franz Embacher | Franz Embacher | Decomposition and unitarity in quantum cosmology | 44 pages, LaTeX (no figures), References on the predecessors of the
refined algebraic quantization program added, minor typos corrected | null | null | UWThPh-1996-64 | gr-qc | null | Considering quantum cosmological minisuperspace models with positive
potential, we present evidence that
(i) despite common belief there are perspectives for defining a unique,
naturally preferred decomposition of the space H of wave functions into two
subspaces H^\pm that generalizes the concept of positive and ne... | [
{
"created": "Mon, 4 Nov 1996 18:26:25 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Dec 1996 12:52:04 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Embacher",
"Franz",
""
]
] | Considering quantum cosmological minisuperspace models with positive potential, we present evidence that (i) despite common belief there are perspectives for defining a unique, naturally preferred decomposition of the space H of wave functions into two subspaces H^\pm that generalizes the concept of positive and negati... |
1602.03839 | LVC Publications | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C.
Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M.
Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith,
B. Allen, A. All... | GW150914: First results from the search for binary black hole
coalescence with Advanced LIGO | 20 pages, 10 figures | Phys. Rev. D 93, 122003 (2016) | 10.1103/PhysRevD.93.122003 | LIGO-P1500269 | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser
Interferometer Gravitational-wave Observatory (LIGO) simultaneously observed
the binary black hole merger GW150914. We report the results of a
matched-filter search using relativistic models of compact-object binaries that
recovered GW150914 as the ... | [
{
"created": "Thu, 11 Feb 2016 19:26:46 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Mar 2016 18:26:03 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Apr 2016 08:39:35 GMT",
"version": "v3"
}
] | 2016-08-06 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Acernese",
"F... | On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) simultaneously observed the binary black hole merger GW150914. We report the results of a matched-filter search using relativistic models of compact-object binaries that recovered GW150914 as the mo... |
2308.16430 | Pramit Rej | Pramit Rej and Piyali Bhar | Relativistic isotropic stellar model in $f(R,\,T)$ gravity with
Durgapal- IV Metric | 17 pages, 9 figures, 2 tables. arXiv admin note: text overlap with
arXiv:2212.07810 | New Astronomy, Volume 105, January 2024, 102113 | 10.1016/j.newast.2023.102113 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a new static, non-singular, spherically symmetric fluid model
has been obtained in the background of $f(R,\,T)$ gravity. Here we consider the
isotropic metric potentials of Durgapal-IV [M.C. Durgapal, J. Phys. A {\bf 15}
2637 (1982)] solution as input to handle the Einstein field equations in
$f(R,\,T)$... | [
{
"created": "Thu, 31 Aug 2023 03:37:30 GMT",
"version": "v1"
}
] | 2023-09-04 | [
[
"Rej",
"Pramit",
""
],
[
"Bhar",
"Piyali",
""
]
] | In this work, a new static, non-singular, spherically symmetric fluid model has been obtained in the background of $f(R,\,T)$ gravity. Here we consider the isotropic metric potentials of Durgapal-IV [M.C. Durgapal, J. Phys. A {\bf 15} 2637 (1982)] solution as input to handle the Einstein field equations in $f(R,\,T)$ e... |
0809.4879 | Anzhong Wang | P. Rocha, R. Chan, M.F.A. da Silva, and Anzhong Wang | Stable and "bounded excursion" gravastars, and black holes in Einstein's
theory of gravity | revtex4, 24 figures, new references added. To appear in JCAP | JCAP 0811:010,2008 | 10.1088/1475-7516/2008/11/010 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical models of prototype gravastars are constructed and studied. The
models are the Visser-Wiltshire three-layer gravastars, in which an infinitely
thin spherical shell of a perfect fluid with the equation of state $p =
(1-\gamma)\sigma$ divides the whole spacetime into two regions, where the
internal region is ... | [
{
"created": "Mon, 29 Sep 2008 00:38:17 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Oct 2008 01:41:55 GMT",
"version": "v2"
}
] | 2009-03-27 | [
[
"Rocha",
"P.",
""
],
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Wang",
"Anzhong",
""
]
] | Dynamical models of prototype gravastars are constructed and studied. The models are the Visser-Wiltshire three-layer gravastars, in which an infinitely thin spherical shell of a perfect fluid with the equation of state $p = (1-\gamma)\sigma$ divides the whole spacetime into two regions, where the internal region is de... |
1201.5647 | Diego S\'aez-G\'omez | A. J. L\'opez-Revelles, Ratbay Myrzakulov, Diego S\'aez-G\'omez | Ekpyrotic universes in $F(R)$ Ho\v{r}ava-Lifshitz gravity | 12 pages. Version to be published in PRD | Phys. Rev. D 85: 103521, 2012 | 10.1103/PhysRevD.85.103521 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ekpyrotic scenario is studied in the context of some extensions of
Ho\v{r}ava-Lifshitz gravity. Some particular solutions that lead to cyclic
Hubble parameters are analyzed, where the corresponding gravitational actions
are reconstructed by using several techniques and auxiliary fields. Its
comparison with standa... | [
{
"created": "Thu, 26 Jan 2012 21:02:38 GMT",
"version": "v1"
},
{
"created": "Wed, 16 May 2012 14:25:41 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"López-Revelles",
"A. J.",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sáez-Gómez",
"Diego",
""
]
] | The Ekpyrotic scenario is studied in the context of some extensions of Ho\v{r}ava-Lifshitz gravity. Some particular solutions that lead to cyclic Hubble parameters are analyzed, where the corresponding gravitational actions are reconstructed by using several techniques and auxiliary fields. Its comparison with standard... |
1012.4390 | Charmousis | Yannis Bardoux, Christos Charmousis and Theodoros Kolyvaris | Lovelock solutions in the presence of matter sources | Regular article, no figures, 29 pages | Phys.Rev.D83:104020,2011 | 10.1103/PhysRevD.83.104020 | LPT 10-102 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a large class of space and time-dependent warped geometries we find the
general solution of the 6-dimensional Einstein-Gauss-Bonnet equations in the
presence of p-form matter fields. This is done under two conditions on the
matter sector which we show impose the integrability of the full system.
Solutions are cla... | [
{
"created": "Mon, 20 Dec 2010 16:33:18 GMT",
"version": "v1"
}
] | 2011-05-19 | [
[
"Bardoux",
"Yannis",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Kolyvaris",
"Theodoros",
""
]
] | For a large class of space and time-dependent warped geometries we find the general solution of the 6-dimensional Einstein-Gauss-Bonnet equations in the presence of p-form matter fields. This is done under two conditions on the matter sector which we show impose the integrability of the full system. Solutions are class... |
1912.12757 | Alexandros Karam Dr. | Ignatios Antoniadis, Alexandros Karam, Angelos Lykkas, Thomas Pappas,
Kyriakos Tamvakis | Single-field inflation in models with an $R^2$ term | 18 pages, 7 figures, invited talk given at Corfu Summer Institute
2019 "School and Workshops on Elementary Particle Physics and Gravity", 31
August - 25 September 2019, Corfu, Greece | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present two cases where the addition of the $R^2$ term to an inflationary
model leads to single-field inflation instead of two-field inflation as is
usually the case. In both cases we find that the effect of the $R^2$ term is to
reduce the value of the tensor-to-scalar ratio $r$.
| [
{
"created": "Sun, 29 Dec 2019 23:28:31 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Antoniadis",
"Ignatios",
""
],
[
"Karam",
"Alexandros",
""
],
[
"Lykkas",
"Angelos",
""
],
[
"Pappas",
"Thomas",
""
],
[
"Tamvakis",
"Kyriakos",
""
]
] | We present two cases where the addition of the $R^2$ term to an inflationary model leads to single-field inflation instead of two-field inflation as is usually the case. In both cases we find that the effect of the $R^2$ term is to reduce the value of the tensor-to-scalar ratio $r$. |
1207.4815 | Gonzalo Olmo | Gonzalo J. Olmo | Cosmology in Palatini theories of gravity | 16 pages, no figures. Contribution to the Proceedings of Spanish
Relativity Meeting ERE2011, Madrid 29 August - 2 September 2011 . Plenary
talk | AIP Conf. Proc. 1458 (2011), 222-237 | 10.1063/1.4734415 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss recent results on the cosmology of extended theories of gravity
formulated in the Palatini approach, i.e., assuming that metric and connection
are independent fields. In particular, we focus on the attempts to explain the
cosmic speedup with f(R) theories and on models that avoid the big bang
singularity. ... | [
{
"created": "Thu, 19 Jul 2012 21:47:15 GMT",
"version": "v1"
}
] | 2012-07-23 | [
[
"Olmo",
"Gonzalo J.",
""
]
] | We discuss recent results on the cosmology of extended theories of gravity formulated in the Palatini approach, i.e., assuming that metric and connection are independent fields. In particular, we focus on the attempts to explain the cosmic speedup with f(R) theories and on models that avoid the big bang singularity. Th... |
1208.3306 | Tushar Kanti Dey | Tushar Kanti Dey | Strong gravitational lensing by Schwarzschild black hole | 4 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Schwarzschild black holes can produce strong gravitational lensing. The
relativistic images are produced due to bending of light around the black hole.
We propose a model equation to study the strong gravitational lensing. The
model equation can well describe the bending angle from a range very close to
the photon sp... | [
{
"created": "Thu, 16 Aug 2012 07:37:44 GMT",
"version": "v1"
}
] | 2012-08-17 | [
[
"Dey",
"Tushar Kanti",
""
]
] | Schwarzschild black holes can produce strong gravitational lensing. The relativistic images are produced due to bending of light around the black hole. We propose a model equation to study the strong gravitational lensing. The model equation can well describe the bending angle from a range very close to the photon sphe... |
1412.7263 | Taeyoon Moon | Yun Soo Myung and Taeyoon Moon | Scale-invariant spectrum of Lee-Wick model in de Sitter spacetime | 1+11 pages, no figures | null | 10.1088/1475-7516/2015/02/044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a scale-invariant spectrum from the Lee-Wick model in de Sitter
spacetime. This model is a fourth-order scalar theory whose mass parameter is
determined by $M^2=2H^2$. The Harrison-Zel'dovich scale-invariant spectrum is
obtained by Fourier transforming the propagator in position space as well as by
computin... | [
{
"created": "Tue, 23 Dec 2014 06:34:42 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Myung",
"Yun Soo",
""
],
[
"Moon",
"Taeyoon",
""
]
] | We obtain a scale-invariant spectrum from the Lee-Wick model in de Sitter spacetime. This model is a fourth-order scalar theory whose mass parameter is determined by $M^2=2H^2$. The Harrison-Zel'dovich scale-invariant spectrum is obtained by Fourier transforming the propagator in position space as well as by computing ... |
0708.3252 | Alfredo Sandoval-Villalbazo | A. L. Garcia-Perciante, A. Sandoval-Villalbazo, L. S. Garcia-Colin | Generalized Relativistic Chapman-Enskog Solution of the Boltzmann
Equation | 12 pages, no figures | PhysicaA387:5073-5079,2008 | 10.1016/j.physa.2008.05.012 | null | gr-qc | null | The Chapman-Enskog method of solution of the relativistic Boltzmann equation
is generalized in order to admit a time-derivative term associated to a
thermodynamic force in its first order solution. Both existence and uniqueness
of such a solution are proved based on the standard theory of integral
equations. The math... | [
{
"created": "Thu, 23 Aug 2007 21:21:41 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Feb 2008 15:26:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Sandoval-Villalbazo",
"A.",
""
],
[
"Garcia-Colin",
"L. S.",
""
]
] | The Chapman-Enskog method of solution of the relativistic Boltzmann equation is generalized in order to admit a time-derivative term associated to a thermodynamic force in its first order solution. Both existence and uniqueness of such a solution are proved based on the standard theory of integral equations. The mathem... |
1810.12648 | Ramin Hassannejad | Ramin Hassannejad, S. Navid Mousavi | Deriving Einstein's Field Equation(EFE) and Modified Gravity by
Statistical Mechanics and Quantization of Non-Commuting Space | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we derive the Einstein's field equation (EFE) by considering
an non-commuting two dimensional quantized space, which can be excited by
absorbing energy. Any variation of the energy level of space quantas, will
result in a change in the quanta's area state. This means, that the geometry of
space depends... | [
{
"created": "Tue, 30 Oct 2018 10:54:40 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Nov 2018 17:23:09 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jun 2019 09:45:11 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Oct 2019 17:17:33 GMT",
"version": "v4"
},
{
"c... | 2020-01-16 | [
[
"Hassannejad",
"Ramin",
""
],
[
"Mousavi",
"S. Navid",
""
]
] | In this paper, we derive the Einstein's field equation (EFE) by considering an non-commuting two dimensional quantized space, which can be excited by absorbing energy. Any variation of the energy level of space quantas, will result in a change in the quanta's area state. This means, that the geometry of space depends o... |
1910.02081 | Kwinten Fransen | Geoffrey Comp\`ere, Kwinten Fransen, Thomas Hertog and Yan Liu | Scalar Self-force for High Spin Black Holes | 41 pages, 18 figures, published version | Phys. Rev. D 101, 064006 (2020) | 10.1103/PhysRevD.101.064006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We semianalytically investigate the scalar self-force experienced in the
final stages of extreme mass ratio inspirals of nonspinning scalar particles
into supermassive nearly extremal Kerr black holes. We exploit the near-horizon
conformal symmetry to find the self-force for general corotating equatorial
geodesics. T... | [
{
"created": "Fri, 4 Oct 2019 18:00:01 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Apr 2020 21:23:29 GMT",
"version": "v2"
}
] | 2020-04-07 | [
[
"Compère",
"Geoffrey",
""
],
[
"Fransen",
"Kwinten",
""
],
[
"Hertog",
"Thomas",
""
],
[
"Liu",
"Yan",
""
]
] | We semianalytically investigate the scalar self-force experienced in the final stages of extreme mass ratio inspirals of nonspinning scalar particles into supermassive nearly extremal Kerr black holes. We exploit the near-horizon conformal symmetry to find the self-force for general corotating equatorial geodesics. The... |
1208.3589 | Brien C. Nolan | Brien C. Nolan and Elizabeth Winstanley | On the existence of dyons and dyonic black holes in Einstein-Yang-Mills
theory | 23 pages, 2 figures. Minor revisions; references added | null | 10.1088/0264-9381/29/23/235024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study dyonic soliton and black hole solutions of the ${\mathfrak {su}}(2)$
Einstein-Yang-Mills equations in asymptotically anti-de Sitter space. We prove
the existence of non-trivial dyonic soliton and black hole solutions in a
neighbourhood of the trivial solution. For these solutions the magnetic gauge
field fun... | [
{
"created": "Fri, 17 Aug 2012 13:01:49 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Oct 2012 13:26:28 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Nolan",
"Brien C.",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We study dyonic soliton and black hole solutions of the ${\mathfrak {su}}(2)$ Einstein-Yang-Mills equations in asymptotically anti-de Sitter space. We prove the existence of non-trivial dyonic soliton and black hole solutions in a neighbourhood of the trivial solution. For these solutions the magnetic gauge field funct... |
1607.08607 | Ruth Gregory | Anne-Christine Davis, Ruth Gregory and Rahul Jha | Black hole accretion discs and screened scalar hair | 19 pages, 5 figures | null | 10.1088/1475-7516/2016/10/024 | DCPT-16/25 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a novel way to investigate scalar field profiles around black
holes with an accretion disc for a range of models where the Compton wavelength
of the scalar is large compared to other length scales. By analysing the
problem in "Weyl" coordinates, we are able to calculate the scalar profiles for
accretion di... | [
{
"created": "Thu, 28 Jul 2016 06:38:29 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Aug 2016 18:55:51 GMT",
"version": "v2"
}
] | 2016-10-19 | [
[
"Davis",
"Anne-Christine",
""
],
[
"Gregory",
"Ruth",
""
],
[
"Jha",
"Rahul",
""
]
] | We present a novel way to investigate scalar field profiles around black holes with an accretion disc for a range of models where the Compton wavelength of the scalar is large compared to other length scales. By analysing the problem in "Weyl" coordinates, we are able to calculate the scalar profiles for accretion disc... |
2312.16295 | Ding Ding | Ding Ding, Zhao Yu, Yidun Wan | Effective dynamics of quantum fluctuations in field theory: with
applications to cosmology | Typos corrected and clarifications added. Matches the JHEP version | JHEP 04 (2024) 086 | 10.1007/JHEP04(2024)086 | null | gr-qc astro-ph.CO hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We develop a novel framework for describing quantum fluctuations in field
theory, with a focus on cosmological applications. Our method uniquely
circumvents the use of operator/Hilbert-space formalism, instead relying on a
systematic treatment of classical variables, quantum fluctuations, and an
effective Hamiltonian... | [
{
"created": "Tue, 26 Dec 2023 19:01:24 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2024 10:35:38 GMT",
"version": "v2"
}
] | 2024-06-25 | [
[
"Ding",
"Ding",
""
],
[
"Yu",
"Zhao",
""
],
[
"Wan",
"Yidun",
""
]
] | We develop a novel framework for describing quantum fluctuations in field theory, with a focus on cosmological applications. Our method uniquely circumvents the use of operator/Hilbert-space formalism, instead relying on a systematic treatment of classical variables, quantum fluctuations, and an effective Hamiltonian. ... |
1804.03992 | Pierre-Andr\'e Mandrin Ph.D. | Pierre A Mandrin | Multi-layer statistical gravity on the boundary | 9 pages. Published | Proceedings of the 8th international workshop DICE2016: spacetime
- matter - quantum mechanics, J. Phys.: Conf. Ser. 880 (2016) 012028 | 10.1088/1742-6596/880/1/012028 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from an important research path, we consider gravity as a collective
phenomenon governed by statistical mechanics. While previous studies have
focussed on the thermodynamic heat flow across a 2d-horizon as perceived by a
single, accelerated observer, we evaluate here the number of microscopic states
arising ... | [
{
"created": "Sat, 7 Apr 2018 15:00:00 GMT",
"version": "v1"
}
] | 2018-04-12 | [
[
"Mandrin",
"Pierre A",
""
]
] | Starting from an important research path, we consider gravity as a collective phenomenon governed by statistical mechanics. While previous studies have focussed on the thermodynamic heat flow across a 2d-horizon as perceived by a single, accelerated observer, we evaluate here the number of microscopic states arising fo... |
2201.00633 | Mohammad Atazadeh | M. Mousavi, K. Atazadeh | Cosmological future singularities in massive gravity and massive
bigravity | 14 pages, 8(*6) figures, references added | Physics of the Dark Universe 35 (2022) 100942 | 10.1016/j.dark.2021.100942 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the future cosmological singularities in the framework of massive
gravity and minimal massive bigravity theory. In this regards, we consider the
possible classes of finite-time future singularities such as sudden, big rip,
big freeze and big brake singularities in the massive universe. In dRGT model
with an ... | [
{
"created": "Mon, 3 Jan 2022 13:12:30 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2022 16:02:03 GMT",
"version": "v2"
}
] | 2022-01-27 | [
[
"Mousavi",
"M.",
""
],
[
"Atazadeh",
"K.",
""
]
] | We study the future cosmological singularities in the framework of massive gravity and minimal massive bigravity theory. In this regards, we consider the possible classes of finite-time future singularities such as sudden, big rip, big freeze and big brake singularities in the massive universe. In dRGT model with an op... |
2101.11129 | Huan Yang | Huan Yang | Relating Black Hole Shadow to Quasinormal Modes for Rotating Black Holes | 7 pages, 3 figures | Phys. Rev. D 103, 084010 (2021) | 10.1103/PhysRevD.103.084010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the connection between the critical curves
("shadows") and the quasinormal mode frequencies (in the eikonal limit) of Kerr
black holes. This mapping has been previously established for non-rotating
black holes. We show that, the shadow seen by an distant observer at a given
inclination angle,... | [
{
"created": "Tue, 26 Jan 2021 23:11:57 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Yang",
"Huan",
""
]
] | In this work, we explore the connection between the critical curves ("shadows") and the quasinormal mode frequencies (in the eikonal limit) of Kerr black holes. This mapping has been previously established for non-rotating black holes. We show that, the shadow seen by an distant observer at a given inclination angle, c... |
gr-qc/9906069 | Bernhard Haisch | Bernhard Haisch and Alfonso Rueda | Progress in Establishing a Connection Between the Electromagnetic
Zero-Point Field and Inertia | 6 pages, no figures | Space Technology and Applications International Forum-99, American
Institute of Physics Conference Proceedings 458, Mohammed S. El-Genk, ed., p.
988 (1999) | 10.1063/1.57490 | null | gr-qc | null | We report on the progress of a NASA-funded study being carried out at the
Lockheed Martin Advanced Technology Center in Palo Alto and the California
State University in Long Beach to investigate the proposed link between the
zero-point field of the quantum vacuum and inertia. It is well known that an
accelerating obs... | [
{
"created": "Wed, 16 Jun 1999 23:33:02 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Haisch",
"Bernhard",
""
],
[
"Rueda",
"Alfonso",
""
]
] | We report on the progress of a NASA-funded study being carried out at the Lockheed Martin Advanced Technology Center in Palo Alto and the California State University in Long Beach to investigate the proposed link between the zero-point field of the quantum vacuum and inertia. It is well known that an accelerating obser... |
0908.3384 | Manuel Hohmann | Manuel Hohmann, Mattias N. R. Wohlfarth | No-go theorem for bimetric gravity with positive and negative mass | 19 pages, no figures, journal version | Phys. Rev. D 80 (2009) 104011 | 10.1103/PhysRevD.80.104011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the most conservative geometric extension of Einstein gravity
describing both positive and negative mass sources and observers is bimetric
gravity and contains two copies of standard model matter which interact only
gravitationally. Matter fields related to one of the metrics then appear dark
from the p... | [
{
"created": "Mon, 24 Aug 2009 09:17:11 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Nov 2009 09:57:00 GMT",
"version": "v2"
}
] | 2009-11-16 | [
[
"Hohmann",
"Manuel",
""
],
[
"Wohlfarth",
"Mattias N. R.",
""
]
] | We argue that the most conservative geometric extension of Einstein gravity describing both positive and negative mass sources and observers is bimetric gravity and contains two copies of standard model matter which interact only gravitationally. Matter fields related to one of the metrics then appear dark from the poi... |
2302.06346 | Serge Parnovsky | S.L. Parnovsky | The dynamics of general Bianchi IX model near the cosmological
singularity | 9 pages, 3 figures. arXiv admin note: text overlap with
arXiv:1202.5448 by other authors | Ukr. J. Phys. Vol. 67 No. 2 P.93-101 (2022) | 10.15407/ujpe67.2.93 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Half a century ago, Belinsky and Khalatnikov proposed a generic solution of
the Einstein equations near their cosmological singularity, based on a
generalization of the homogeneous model of Bianchi type IX. Consideration of
the evolution of the most general non-diagonal case of this model is greatly
simplified if it ... | [
{
"created": "Mon, 13 Feb 2023 13:27:21 GMT",
"version": "v1"
}
] | 2023-02-14 | [
[
"Parnovsky",
"S. L.",
""
]
] | Half a century ago, Belinsky and Khalatnikov proposed a generic solution of the Einstein equations near their cosmological singularity, based on a generalization of the homogeneous model of Bianchi type IX. Consideration of the evolution of the most general non-diagonal case of this model is greatly simplified if it is... |
1312.6355 | Marek Czachor | Marek Czachor, Andrzej Posiewnik | Wavepacket of the Universe and its spreading | v1 preliminary report, v2 includes sections on the explicit form of
the evolution operator, v3 includes an explicit analysis based on
Kolmogorov-Nagumo-Renyi averaging, v4 section on 1+3 generalization is
corrected, v5 conflict of notation in Bernoulli and Renyi forms is fixed; v6
accepted in Int.J.Theor.Phys | Int. J. Theor. Phys. 55, 2001-2011 (2016) | 10.1007/s10773-015-2840-7 | null | gr-qc nlin.CD quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wavepackets in quantum mechanics spread and the Universe in cosmology
expands. We discuss a formalism where the two effects can be unified. The basic
assumption is that the Universe is determined by a unitarily evolving
wavepacket defined on space-time. Space-time is static but the Universe is
dynamic. Spreading anal... | [
{
"created": "Sun, 22 Dec 2013 09:53:09 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jan 2014 16:09:15 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Apr 2014 12:12:08 GMT",
"version": "v3"
},
{
"created": "Sun, 11 May 2014 09:48:09 GMT",
"version": "v4"
},
{
"cr... | 2016-04-22 | [
[
"Czachor",
"Marek",
""
],
[
"Posiewnik",
"Andrzej",
""
]
] | Wavepackets in quantum mechanics spread and the Universe in cosmology expands. We discuss a formalism where the two effects can be unified. The basic assumption is that the Universe is determined by a unitarily evolving wavepacket defined on space-time. Space-time is static but the Universe is dynamic. Spreading analog... |
0901.4009 | Joseph Henson | Joe Henson | Quantum Histories and Quantum Gravity | 35 pages (29 pages main body), two figures | J.Phys.Conf.Ser.174:012020,2009 | 10.1088/1742-6596/174/1/012020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper reviews the histories approach to quantum mechanics. This
discussion is then applied to theories of quantum gravity. It is argued that
some of the quantum histories must approximate (in a suitable sense) to
classical histories, if the correct classical regime is to be recovered. This
observation has signif... | [
{
"created": "Mon, 26 Jan 2009 14:13:18 GMT",
"version": "v1"
}
] | 2009-07-24 | [
[
"Henson",
"Joe",
""
]
] | This paper reviews the histories approach to quantum mechanics. This discussion is then applied to theories of quantum gravity. It is argued that some of the quantum histories must approximate (in a suitable sense) to classical histories, if the correct classical regime is to be recovered. This observation has signific... |
2311.12907 | Mikhail Katanaev | M. O. Katanaev | Complete separation of variables in the geodesic Hamilton--Jacobi
equation in four dimensions | 11 pages. arXiv admin note: substantial text overlap with
arXiv:2305.02222 | Phys. Scr. 98 (2023)104001 | 10.1088/1402-4896/acf251 | null | gr-qc math-ph math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | We list all metrics of arbitrary signature in four dimensions which admit
complete separation of variables in the Hamilton--Jacobi equation for geodesic
Hamiltonians. There are only ten classes of separable metrics admitting
commuting Killing vector fields, indecomposable quadratic conservation laws,
and coisotropic ... | [
{
"created": "Tue, 21 Nov 2023 13:55:06 GMT",
"version": "v1"
}
] | 2023-11-23 | [
[
"Katanaev",
"M. O.",
""
]
] | We list all metrics of arbitrary signature in four dimensions which admit complete separation of variables in the Hamilton--Jacobi equation for geodesic Hamiltonians. There are only ten classes of separable metrics admitting commuting Killing vector fields, indecomposable quadratic conservation laws, and coisotropic co... |
1303.4516 | Claes Uggla | Claes Uggla, John Wainwright | Asymptotic analysis of perturbed dust cosmologies to second order | 23 pages, no figures | Gen. Rel. Grav. 45 (2013) 1467 | 10.1007/s10714-013-1559-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonlinear perturbations of Friedmann-Lemaitre cosmologies with dust and a
positive cosmological constant have recently attracted considerable attention.
In this paper our first goal is to compare the evolution of the first and
second order perturbations by determining their asymptotic behaviour at late
times in ever-... | [
{
"created": "Tue, 19 Mar 2013 09:10:39 GMT",
"version": "v1"
}
] | 2013-08-28 | [
[
"Uggla",
"Claes",
""
],
[
"Wainwright",
"John",
""
]
] | Nonlinear perturbations of Friedmann-Lemaitre cosmologies with dust and a positive cosmological constant have recently attracted considerable attention. In this paper our first goal is to compare the evolution of the first and second order perturbations by determining their asymptotic behaviour at late times in ever-ex... |
1505.07770 | Ikjyot Singh Kohli | Ikjyot Singh Kohli | On Singularities in Cosmic Inflation | Added some references, updated some equations | null | null | null | gr-qc astro-ph.CO math-ph math.CA math.DS math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine a flat FLRW spacetime with a scalar field potential
and show by applying Osgood's criterion to the Einstein field equations that
all such models, irrespective of the particular choice of potential develop
finite-time singularities. That is, we show that solutions to the field
equations becom... | [
{
"created": "Thu, 28 May 2015 17:39:32 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2015 15:16:43 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Jul 2015 16:39:30 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Apr 2016 15:19:32 GMT",
"version": "v4"
}
] | 2016-04-26 | [
[
"Kohli",
"Ikjyot Singh",
""
]
] | In this paper, we examine a flat FLRW spacetime with a scalar field potential and show by applying Osgood's criterion to the Einstein field equations that all such models, irrespective of the particular choice of potential develop finite-time singularities. That is, we show that solutions to the field equations become ... |
2011.10503 | Oliver Fabio Piattella | J\'ulio C. Fabris, Oliver F. Piattella, and Davi C. Rodrigues | On Rastall gravity formulation as a $f(R,\mathcal{L}_m)$ and a $f(R,T)$
theory | 11 pages, accepted for publication in the European Physical Journal
Plus | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rastall introduced a stress-energy tensor whose divergence is proportional to
the gradient of the Ricci scalar. This proposal leads to a change in the form
of the field equations of General Relativity, but it preserves the number of
degrees of freedom. Rastall's field equations can be either interpreted as GR
with a ... | [
{
"created": "Fri, 20 Nov 2020 17:03:48 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Nov 2022 09:18:01 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Feb 2023 14:43:41 GMT",
"version": "v3"
}
] | 2023-02-28 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Piattella",
"Oliver F.",
""
],
[
"Rodrigues",
"Davi C.",
""
]
] | Rastall introduced a stress-energy tensor whose divergence is proportional to the gradient of the Ricci scalar. This proposal leads to a change in the form of the field equations of General Relativity, but it preserves the number of degrees of freedom. Rastall's field equations can be either interpreted as GR with a re... |
1609.09779 | Sunandan Gangopadhyay | Saumya Ghosh, Sunandan Gangopadhyay | Thermodynamics and emergent universe | 10 pages Latex | Mod. Phys. Lett. A 32 (2017) 1750089 | 10.1142/S0217732317500894 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in the isentropic scenario the first order thermodynamical
particle creation model gives an emergent universe solution even when the
chemical potential is non-zero. However there exists no emergent universe
scenario in the second order non-equilibrium theory for the particle creation
model. We then point... | [
{
"created": "Wed, 28 Sep 2016 15:05:31 GMT",
"version": "v1"
}
] | 2017-05-01 | [
[
"Ghosh",
"Saumya",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | We show that in the isentropic scenario the first order thermodynamical particle creation model gives an emergent universe solution even when the chemical potential is non-zero. However there exists no emergent universe scenario in the second order non-equilibrium theory for the particle creation model. We then point o... |
2110.14630 | Ruslan Muharlyamov | Ruslan K. Muharlyamov, Tatiana N. Pankratyeva | The nonlinear anisotropic model of the Universe with the linear
potential | null | Indian J Phys (2022) | 10.1007/s12648-022-02556-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the Bianchi I cosmology some subclasses of the Horndeski theory allow for
the non-standard anisotropy behavior. For example, the anisotropy is damped
near the initial singularity instead of tending to infinity. In this article,
we analyze the nonlinear anisotropic model with the linear potential.We have
considered... | [
{
"created": "Wed, 27 Oct 2021 17:55:45 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Dec 2022 11:25:41 GMT",
"version": "v2"
}
] | 2022-12-27 | [
[
"Muharlyamov",
"Ruslan K.",
""
],
[
"Pankratyeva",
"Tatiana N.",
""
]
] | In the Bianchi I cosmology some subclasses of the Horndeski theory allow for the non-standard anisotropy behavior. For example, the anisotropy is damped near the initial singularity instead of tending to infinity. In this article, we analyze the nonlinear anisotropic model with the linear potential.We have considered a... |
gr-qc/0106092 | Andrey Neronov | Andrey Neronov | Fermion masses and quantum numbers from extra dimensions | 14 pages | Phys.Rev.D65:044004,2002 | 10.1103/PhysRevD.65.044004 | null | gr-qc hep-ph hep-th | null | We study the localization of fermions on a brane embedded in a space-time
with $AdS_n \times M^k$ geometry. Quantum numbers of localized fermions are
associated with their rotation momenta around the brane. Fermions with
different quantum numbers have different higher-dimensional profiles. Fermion
masses and mixings,... | [
{
"created": "Thu, 28 Jun 2001 19:08:17 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Neronov",
"Andrey",
""
]
] | We study the localization of fermions on a brane embedded in a space-time with $AdS_n \times M^k$ geometry. Quantum numbers of localized fermions are associated with their rotation momenta around the brane. Fermions with different quantum numbers have different higher-dimensional profiles. Fermion masses and mixings, w... |
1901.08804 | Pratyusava Baral | Pratyusava Baral, Anarya Ray, Ratna Koley and Parthasarathi Majumdar | Gravitational Waves with Orbital Angular Momentum | 8 pages, 4 figures Version to appear in EPJC | null | 10.1140/epjc/s10052-020-7881-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compact orbiting binaries like the black hole binary system observed in
GW150914 carry large amount of orbital angular momentum. The post-ringdown
compact object formed after merger of such a binary configuration has only spin
angular momentum, and this results in a large orbital angular momentum excess.
One signific... | [
{
"created": "Fri, 25 Jan 2019 09:58:35 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2019 06:55:13 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Mar 2020 18:01:23 GMT",
"version": "v3"
}
] | 2020-05-20 | [
[
"Baral",
"Pratyusava",
""
],
[
"Ray",
"Anarya",
""
],
[
"Koley",
"Ratna",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | Compact orbiting binaries like the black hole binary system observed in GW150914 carry large amount of orbital angular momentum. The post-ringdown compact object formed after merger of such a binary configuration has only spin angular momentum, and this results in a large orbital angular momentum excess. One significan... |
gr-qc/9302027 | Ranjeet S. Tate | Abhay Ashtekar, Ranjeet S. Tate and Claes Uggla | Minisuperspaces: Observables and Quantization | 34 pages | Int.J.Mod.Phys.D2:15-50,1993 | 10.1142/S0218271893000039 | Syracuse University preprint SU-GP-92/2-6 | gr-qc | null | A canonical transformation is performed on the phase space of a number of
homogeneous cosmologies to simplify the form of the scalar (or, Hamiltonian)
constraint. Using the new canonical coordinates, it is then easy to obtain
explicit expressions of Dirac observables, i.e.\ phase space functions which
commute weakly ... | [
{
"created": "Sun, 21 Feb 1993 07:47:45 GMT",
"version": "v1"
}
] | 2009-07-10 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Tate",
"Ranjeet S.",
""
],
[
"Uggla",
"Claes",
""
]
] | A canonical transformation is performed on the phase space of a number of homogeneous cosmologies to simplify the form of the scalar (or, Hamiltonian) constraint. Using the new canonical coordinates, it is then easy to obtain explicit expressions of Dirac observables, i.e.\ phase space functions which commute weakly wi... |
1503.05109 | Sunil Kumar Tripathy Dr. | S. K. Tripathy, B. Mishra and P. K. Sahoo | Two fluid anisotropic dark energy models in a scale invariant theory | 20 pages, 10 figures, accepted for publication in Eur. Phys. J. Plus | Eur. Phys. J. Plus, 132:388, 2017 | 10.1140/epjp/i2017-11672-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some anisotropic Bianchi V dark energy models are investigated in a scale
invariant theory of gravity. We consider two non interacting fluids such as
dark energy and a bulk viscous fluid. Dark energy pressure is considered to be
anisotropic in different spatial directions. A dynamically evolving pressure
anisotropy i... | [
{
"created": "Sun, 15 Mar 2015 05:59:12 GMT",
"version": "v1"
},
{
"created": "Mon, 29 May 2017 18:03:26 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Aug 2017 15:59:23 GMT",
"version": "v3"
}
] | 2017-10-25 | [
[
"Tripathy",
"S. K.",
""
],
[
"Mishra",
"B.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | Some anisotropic Bianchi V dark energy models are investigated in a scale invariant theory of gravity. We consider two non interacting fluids such as dark energy and a bulk viscous fluid. Dark energy pressure is considered to be anisotropic in different spatial directions. A dynamically evolving pressure anisotropy is ... |
1907.07497 | Isha Kotecha | Isha Kotecha | Thermal quantum spacetime | v2 minor changes, published version; 19 pages, 1 figure; invited
contribution to the special issue "Progress in Group Field Theory and Related
Quantum Gravity Formalisms", eds. S. Carrozza, S. Gielen and D. Oriti | null | 10.3390/universe5080187 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The intersection of thermodynamics, quantum theory and gravity has revealed
many profound insights, all the while posing new puzzles. In this article, we
discuss an extension of equilibrium statistical mechanics and thermodynamics
potentially compatible with a key feature of general relativity, background
independenc... | [
{
"created": "Wed, 17 Jul 2019 13:18:21 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Aug 2019 17:06:23 GMT",
"version": "v2"
}
] | 2019-08-13 | [
[
"Kotecha",
"Isha",
""
]
] | The intersection of thermodynamics, quantum theory and gravity has revealed many profound insights, all the while posing new puzzles. In this article, we discuss an extension of equilibrium statistical mechanics and thermodynamics potentially compatible with a key feature of general relativity, background independence;... |
gr-qc/9611054 | Miguel Navarro | J. Cruz, J. Navarro-Salas, M. Navarro and C. F. Talavera | New Symmetries in Two-Dimensional Dilaton Gravity | Talk given at the XXI International Colloquium on Group Theoretical
Methods in Physics. 15--20 July 1996, Goslar, Germany. To appear in the
Proceedings. 6 pages | null | null | null | gr-qc | null | We present three types of non-conformal symmetries for a wide class of 2D
dilaton-gravity models. For the particular CGHS, or string-inspired model, a
linear combination of these symmetries is conformal and turns out to be the
well-known symmetry which allows to construct the exactly solvable
semiclassical RST and BP... | [
{
"created": "Fri, 22 Nov 1996 11:39:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cruz",
"J.",
""
],
[
"Navarro-Salas",
"J.",
""
],
[
"Navarro",
"M.",
""
],
[
"Talavera",
"C. F.",
""
]
] | We present three types of non-conformal symmetries for a wide class of 2D dilaton-gravity models. For the particular CGHS, or string-inspired model, a linear combination of these symmetries is conformal and turns out to be the well-known symmetry which allows to construct the exactly solvable semiclassical RST and BPP ... |
2106.06821 | Ivan de Martino | Ivan de Martino, Riccardo della Monica, Mariafelicia de Laurentis | $f(R)$-gravity after the detection of the orbital precession of the S2
star around the Galactic centre massive black hole | 8 pages, 1 Figure, and Supplemental Materials. Submitted to PRD | Physical Review D, 104, L101502 (2021) | 10.1103/PhysRevD.104.L101502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The GRAVITY Collaboration achieved the remarkable detection of the orbital
precession of the S2 star around the Galactic centre supermassive black hole,
providing yet another proof of the validity of the General Relativity. The
departure from the Schwarzschild precession is encoded in the parameter $f_{\rm
SP}$ which... | [
{
"created": "Sat, 12 Jun 2021 16:53:58 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Oct 2021 12:46:40 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Oct 2021 14:24:38 GMT",
"version": "v3"
}
] | 2021-11-18 | [
[
"de Martino",
"Ivan",
""
],
[
"della Monica",
"Riccardo",
""
],
[
"de Laurentis",
"Mariafelicia",
""
]
] | The GRAVITY Collaboration achieved the remarkable detection of the orbital precession of the S2 star around the Galactic centre supermassive black hole, providing yet another proof of the validity of the General Relativity. The departure from the Schwarzschild precession is encoded in the parameter $f_{\rm SP}$ which m... |
2301.06639 | Sizheng Ma | Sizheng Ma, Ling Sun, Yanbei Chen | Using rational filters to uncover the first ringdown overtone in
GW150914 | null | Phys. Rev. D 107, 084010 (2023) | 10.1103/PhysRevD.107.084010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There have been debates in the literature about the existence of the first
overtone in the ringdown of GW150914. We develop a novel Bayesian framework to
reanalyze the data of this event, by incorporating a new technique, the
"rational filter" that can clean particular modes from the ringdown signal. We
examine the e... | [
{
"created": "Mon, 16 Jan 2023 23:48:26 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2023 16:49:14 GMT",
"version": "v2"
}
] | 2023-04-06 | [
[
"Ma",
"Sizheng",
""
],
[
"Sun",
"Ling",
""
],
[
"Chen",
"Yanbei",
""
]
] | There have been debates in the literature about the existence of the first overtone in the ringdown of GW150914. We develop a novel Bayesian framework to reanalyze the data of this event, by incorporating a new technique, the "rational filter" that can clean particular modes from the ringdown signal. We examine the exi... |
1402.6723 | Saulo Pereira H | S. H. Pereira, A. Pinho S. S. and J. M. Hoff da Silva | Some remarks on the attractor behaviour in ELKO cosmology | 17 pages, section III with minor changes and section IV rewritten
with a new analysis | JCAP08(2014)020 | 10.1088/1475-7516/2014/08/020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent results on the dynamical stability of a system involving the
interaction of the ELKO spinor field with standard matter in the universe have
been reanalysed, and the conclusion is that such system does not exhibit
isolated stable points that could alleviate the cosmic coincidence problem.
When a constant parame... | [
{
"created": "Wed, 26 Feb 2014 22:00:20 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Aug 2014 14:25:27 GMT",
"version": "v2"
}
] | 2015-02-04 | [
[
"Pereira",
"S. H.",
""
],
[
"S.",
"A. Pinho S.",
""
],
[
"da Silva",
"J. M. Hoff",
""
]
] | Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit isolated stable points that could alleviate the cosmic coincidence problem. When a constant paramete... |
0803.1538 | Pierre Martinetti | Pierre Martinetti | Conformal mapping of Unruh temperature | Paper shortened and reorganized. To be published in Modern Physics
Letters A | Mod.Phys.Lett.A24:1473-1483,2009 | 10.1142/S0217732309030874 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thanks to a local interpetation of the KMS condition, the mapping from
(unbounded) wedge regions of Minkowski space-time to (bounded) double-cone
regions is extended to the Unruh temperature associated to relevant observers
in both regions. A previous result, the diamond's temperature, is shown to be
proportional to ... | [
{
"created": "Tue, 11 Mar 2008 09:08:11 GMT",
"version": "v1"
},
{
"created": "Sat, 2 May 2009 14:50:57 GMT",
"version": "v2"
}
] | 2009-07-22 | [
[
"Martinetti",
"Pierre",
""
]
] | Thanks to a local interpetation of the KMS condition, the mapping from (unbounded) wedge regions of Minkowski space-time to (bounded) double-cone regions is extended to the Unruh temperature associated to relevant observers in both regions. A previous result, the diamond's temperature, is shown to be proportional to th... |
1704.03061 | David McNutt | D. D. McNutt, A. A. Coley, and A. Forget | The Cartan Algorithm in Five Dimensions | 18 pages | Journal of Mathematical Physics, 58 035202, 2017 | 10.1063/1.4977985 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we introduce an algorithm to determine the equivalence of five
dimensional spacetimes, which generalizes the Karlhede algorithm for four
dimensional general relativity. As an alternative to the Petrov type
classification, we employ the alignment classification to algebraically
classify the Weyl tensor. ... | [
{
"created": "Mon, 10 Apr 2017 21:34:04 GMT",
"version": "v1"
}
] | 2017-04-12 | [
[
"McNutt",
"D. D.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Forget",
"A.",
""
]
] | In this paper we introduce an algorithm to determine the equivalence of five dimensional spacetimes, which generalizes the Karlhede algorithm for four dimensional general relativity. As an alternative to the Petrov type classification, we employ the alignment classification to algebraically classify the Weyl tensor. To... |
1808.04315 | Sandeep Aashish | Sandeep Aashish, Abhilash Padhy, Sukanta Panda and Arun Rana | Inflation with an antisymmetric tensor field | 10 pages; minor correction to the claim of Sec. IV; to appear in EPJ
C | Eur. Phys. J. C (2018) 78: 887 | 10.1140/epjc/s10052-018-6366-z | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility of inflation with models of antisymmetric
tensor field having minimal and nonminimal couplings to gravity. Although the
minimal model does not support inflation, the nonminimal models, through the
introduction of a nonminimal coupling to gravity, can give rise to stable
de-Sitter soluti... | [
{
"created": "Mon, 13 Aug 2018 16:16:14 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Sep 2018 06:23:29 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Oct 2018 02:41:14 GMT",
"version": "v3"
}
] | 2018-11-02 | [
[
"Aashish",
"Sandeep",
""
],
[
"Padhy",
"Abhilash",
""
],
[
"Panda",
"Sukanta",
""
],
[
"Rana",
"Arun",
""
]
] | We investigate the possibility of inflation with models of antisymmetric tensor field having minimal and nonminimal couplings to gravity. Although the minimal model does not support inflation, the nonminimal models, through the introduction of a nonminimal coupling to gravity, can give rise to stable de-Sitter solution... |
1605.03431 | Tony Scott C. | T. C. Scott, Xiangdong Zhang, R. B. Mann and G. J. Fee | Canonical reduction for dilatonic gravity in 3+1 dimensions | Sequel to arXiv:gr-qc/0611144, doi:10.1088/0264-9381/24/18/006 | Physical Review D 93, 084017 (2016) | 10.1103/PhysRevD.93.084017. | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the 1+1-dimensional gravity formalism of Ohta and Mann to 3+1
dimensions by developing the canonical reduction of a proposed formalism
applied to a system coupled with a set of point particles. This is done via the
Arnowitt-Deser-Misner method and by eliminating the resulting constraints and
imposing co... | [
{
"created": "Wed, 11 May 2016 13:23:39 GMT",
"version": "v1"
}
] | 2016-05-12 | [
[
"Scott",
"T. C.",
""
],
[
"Zhang",
"Xiangdong",
""
],
[
"Mann",
"R. B.",
""
],
[
"Fee",
"G. J.",
""
]
] | We generalize the 1+1-dimensional gravity formalism of Ohta and Mann to 3+1 dimensions by developing the canonical reduction of a proposed formalism applied to a system coupled with a set of point particles. This is done via the Arnowitt-Deser-Misner method and by eliminating the resulting constraints and imposing coor... |
2303.03130 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | General black-hole metric mimicking Schwarzschild spacetime | 9 pages (REVTeX), 3 figures | JCAP 08 (2023) 008 | 10.1088/1475-7516/2023/08/008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the general parametrization of spherically symmetric and asymptotically
flat black holes in arbitrary metric theories of gravity and implying that: a)
the post-Newtonian constraints are taken into account and b) basic
astrophysically relevant characteristics (such as, dominant quasinormal modes,
frequency at th... | [
{
"created": "Mon, 6 Mar 2023 13:47:20 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Mar 2023 20:29:34 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Aug 2023 18:28:17 GMT",
"version": "v3"
}
] | 2023-08-10 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Using the general parametrization of spherically symmetric and asymptotically flat black holes in arbitrary metric theories of gravity and implying that: a) the post-Newtonian constraints are taken into account and b) basic astrophysically relevant characteristics (such as, dominant quasinormal modes, frequency at the ... |
0802.1978 | Claus Kiefer | Mark Albers, Claus Kiefer, Marcel Reginatto | Measurement Analysis and Quantum Gravity | 31 pages, many conceptual clarifications included, new appendix
added, to appear in Phys. Rev. D | Phys.Rev.D78:064051,2008 | 10.1103/PhysRevD.78.064051 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the question of whether consistency arguments based on
measurement theory show that the gravitational field must be quantized.
Motivated by the argument of Eppley and Hannah, we apply a DeWitt-type
measurement analysis to a coupled system that consists of a gravitational wave
interacting with a mass cube.... | [
{
"created": "Thu, 14 Feb 2008 08:57:57 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2008 13:26:15 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Albers",
"Mark",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Reginatto",
"Marcel",
""
]
] | We consider the question of whether consistency arguments based on measurement theory show that the gravitational field must be quantized. Motivated by the argument of Eppley and Hannah, we apply a DeWitt-type measurement analysis to a coupled system that consists of a gravitational wave interacting with a mass cube. W... |
1102.4538 | Valent Galliano | Galliano Valent | Further results on non-diagonal Bianchi type III vacuum metrics | 21 pages, no figures | null | 10.1007/s10714-012-1340-9 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the derivation, for these vacuum metrics, of the Painlev\'e VI
equation first obtained by Christodoulakis and Terzis, from the field equations
for both minkowskian and euclidean signatures. This allows a complete
discussion and the precise connection with some old results due to Kinnersley.
The hyperk\"ahl... | [
{
"created": "Tue, 22 Feb 2011 15:39:38 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Valent",
"Galliano",
""
]
] | We present the derivation, for these vacuum metrics, of the Painlev\'e VI equation first obtained by Christodoulakis and Terzis, from the field equations for both minkowskian and euclidean signatures. This allows a complete discussion and the precise connection with some old results due to Kinnersley. The hyperk\"ahler... |
1810.04399 | Dieter Heiss | WD Heiss | An effective interaction at the Planck mass and Planck length | 4 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A simple model is suggested by assuming an effective interaction at the
crossing point of the two curves, the Schwarzschild radius and the Compton wave
length, that is at the Planck length and Planck mass. It is argued that there
would be a physical effect that may be measurable at, say, nucleon mass and
size, while ... | [
{
"created": "Wed, 10 Oct 2018 07:46:12 GMT",
"version": "v1"
}
] | 2018-10-11 | [
[
"Heiss",
"WD",
""
]
] | A simple model is suggested by assuming an effective interaction at the crossing point of the two curves, the Schwarzschild radius and the Compton wave length, that is at the Planck length and Planck mass. It is argued that there would be a physical effect that may be measurable at, say, nucleon mass and size, while th... |
2103.12272 | Ying Wang | Ying Wang, Wei Sun, Fuyao Liu, Xin Wu | Construction of explicit symplectic integrators in general relativity.
III. Reissner-Nordstrom-(anti)-de Sitter black holes | 15pages,26figures | null | 10.3847/1538-4365/abf116 | null | gr-qc astro-ph.IM nlin.CD physics.comp-ph | http://creativecommons.org/licenses/by/4.0/ | We give a possible splitting method to a Hamiltonian for the description of
charged particles moving around the Reissner-Nordstrom-(anti)-de Sitter black
hole with an external magnetic field. This Hamiltonian can be separated into
six analytical solvable pieces, whose solutions are explicit functions of
proper time. ... | [
{
"created": "Tue, 23 Mar 2021 02:44:50 GMT",
"version": "v1"
}
] | 2021-05-05 | [
[
"Wang",
"Ying",
""
],
[
"Sun",
"Wei",
""
],
[
"Liu",
"Fuyao",
""
],
[
"Wu",
"Xin",
""
]
] | We give a possible splitting method to a Hamiltonian for the description of charged particles moving around the Reissner-Nordstrom-(anti)-de Sitter black hole with an external magnetic field. This Hamiltonian can be separated into six analytical solvable pieces, whose solutions are explicit functions of proper time. In... |
1707.02943 | Robert Sims | Stephon Alexander, Sam Cormack, David Lowe, Robert Sims | On the Classical and Quantum Stability of a Cosmic Ghost | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ghost fields have reemerged in a handful of phenomenologically motivated
cosmological and particle physics scenarios, and most recently in a cyclic
mechanism to address the fine-tuning of gauge couplings in the standard model.
We study the classical and quantum stability of a ghost-dilaton system coupled
to a gauge s... | [
{
"created": "Mon, 10 Jul 2017 16:47:58 GMT",
"version": "v1"
}
] | 2017-07-11 | [
[
"Alexander",
"Stephon",
""
],
[
"Cormack",
"Sam",
""
],
[
"Lowe",
"David",
""
],
[
"Sims",
"Robert",
""
]
] | Ghost fields have reemerged in a handful of phenomenologically motivated cosmological and particle physics scenarios, and most recently in a cyclic mechanism to address the fine-tuning of gauge couplings in the standard model. We study the classical and quantum stability of a ghost-dilaton system coupled to a gauge sec... |
1110.2379 | Orfeu Bertolami | Orfeu Bertolami, Ant\'onio Martins | On the dynamics of perfect fluids in non-minimally coupled gravity | 7 pages, 3 figures | null | 10.1103/PhysRevD.85.024012 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore the consequences that a non-minimal coupling between
geometry and matter can have on the dynamics of perfect fluids. It is argued
that the presence of a static, axially symmetric pressureless fluid does not
imply a Minkowski space-time like as is in General Relativity. This feature can
be atri... | [
{
"created": "Tue, 11 Oct 2011 13:52:48 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Martins",
"António",
""
]
] | In this work we explore the consequences that a non-minimal coupling between geometry and matter can have on the dynamics of perfect fluids. It is argued that the presence of a static, axially symmetric pressureless fluid does not imply a Minkowski space-time like as is in General Relativity. This feature can be atribu... |
gr-qc/0103114 | David Blashke | D. Blaschke, V. Pervushin, D. Proskurin, S. Vinitsky, A. Gusev | Cosmological Creation of Vector Bosons and Fermions | 20 pages, 1 figure, discussion extended, typos corrected | null | null | JINR-E2-2001-52 | gr-qc astro-ph | null | The cosmological creation of primordial vector bosons and fermions is
described in the Standard Model of strong and electro-weak interactions given
in a space-time with the relative standard of measurement of geometric
intervals. Using the reparametrization - invariant perturbation theory and the
holomorphic represen... | [
{
"created": "Fri, 30 Mar 2001 21:34:14 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jun 2001 03:35:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Blaschke",
"D.",
""
],
[
"Pervushin",
"V.",
""
],
[
"Proskurin",
"D.",
""
],
[
"Vinitsky",
"S.",
""
],
[
"Gusev",
"A.",
""
]
] | The cosmological creation of primordial vector bosons and fermions is described in the Standard Model of strong and electro-weak interactions given in a space-time with the relative standard of measurement of geometric intervals. Using the reparametrization - invariant perturbation theory and the holomorphic representa... |
1908.06654 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola and Jose Perdiguero and Oscar Orellana and
Alfonso R. Zerwekh | Emergent metric and geodesic analysis in cosmological solutions of
(torsion-free) Polynomial Affine Gravity | 19 pages, 4 figures. Comments are welcome | null | 10.1088/1361-6382/ab58ef | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Starting from an affinely connected space, we consider a model of gravity
whose fundamental field is the connection. We build up the action using as sole
premise the invariance under diffeomorphisms, and study the consequences of a
cosmological ansatz for the affine connection in the torsion-free sector.
Although the... | [
{
"created": "Mon, 19 Aug 2019 09:10:46 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Castillo-Felisola",
"Oscar",
""
],
[
"Perdiguero",
"Jose",
""
],
[
"Orellana",
"Oscar",
""
],
[
"Zerwekh",
"Alfonso R.",
""
]
] | Starting from an affinely connected space, we consider a model of gravity whose fundamental field is the connection. We build up the action using as sole premise the invariance under diffeomorphisms, and study the consequences of a cosmological ansatz for the affine connection in the torsion-free sector. Although the m... |
2301.00724 | Frans Klinkhamer | F.R. Klinkhamer | Defect wormhole: A traversable wormhole without exotic matter | 20 pages, 5 figures, v8: published version | Acta Phys. Polon. B 54, 5-A3 (2023) | 10.5506/APhysPolB.54.5-A3 | KA-TP-31-2022 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a traversable-wormhole solution of the gravitational field
equation of General Relativity without need of exotic matter (exotic matter
can, for example, have negative energy density and vanishing isotropic
pressure). Instead of exotic matter, the solution relies on a 3-dimensional
"spacetime defect" charac... | [
{
"created": "Fri, 30 Dec 2022 18:29:15 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jan 2023 16:29:50 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Jan 2023 15:35:20 GMT",
"version": "v3"
},
{
"created": "Mon, 6 Feb 2023 15:44:28 GMT",
"version": "v4"
},
{
"cre... | 2023-06-16 | [
[
"Klinkhamer",
"F. R.",
""
]
] | We present a traversable-wormhole solution of the gravitational field equation of General Relativity without need of exotic matter (exotic matter can, for example, have negative energy density and vanishing isotropic pressure). Instead of exotic matter, the solution relies on a 3-dimensional "spacetime defect" characte... |
gr-qc/9909020 | Eric Gourgoulhon | S. Bonazzola, E. Gourgoulhon, P. Grandclement and J.-A. Marck (DARC,
CNRS, Observatoire de Paris) | Darwin-Riemann problems in general relativity | 20 pages, 11 PostScript figures, uses PTPTeX, to appear in the
Proceedings of Yukawa International Seminar 99 "Black Holes and Gravitational
Waves", edited by T. Nakamura & H. Kodama, Prog. Theor. Phys. Suppl | Prog.Theor.Phys.Suppl.136:216,1999 | 10.1143/PTPS.136.216 | null | gr-qc | null | A review is given of recent results about the computation of irrotational
Darwin-Riemann configurations in general relativity. Such configurations are
expected to represent fairly well the late stages of inspiralling binary
neutron stars.
| [
{
"created": "Mon, 6 Sep 1999 12:40:19 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bonazzola",
"S.",
"",
"DARC,\n CNRS, Observatoire de Paris"
],
[
"Gourgoulhon",
"E.",
"",
"DARC,\n CNRS, Observatoire de Paris"
],
[
"Grandclement",
"P.",
"",
"DARC,\n CNRS, Observatoire de Paris"
],
[
"Marck",
"J. -A.",
"",
"DARC,\n ... | A review is given of recent results about the computation of irrotational Darwin-Riemann configurations in general relativity. Such configurations are expected to represent fairly well the late stages of inspiralling binary neutron stars. |
1911.11203 | Steven Carlip | S. Carlip | A comment on "How the cosmological constant is hidden by Planck scale
curvature fluctuations'' | 5 pages, reply to arXiv:1911.06110 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent preprint by Wang and Unruh [arXiv:1911.06110] contains a number of
criticisms of my paper, "Hiding the cosmological constant" [Phys. Rev. Lett.
123 (2019) 131302, arXiv:1809.08277]. While Wang and Unruh suggest an
interesting alternative scenario and raise an important conceptual question,
most of their crit... | [
{
"created": "Mon, 25 Nov 2019 20:10:47 GMT",
"version": "v1"
}
] | 2019-11-27 | [
[
"Carlip",
"S.",
""
]
] | A recent preprint by Wang and Unruh [arXiv:1911.06110] contains a number of criticisms of my paper, "Hiding the cosmological constant" [Phys. Rev. Lett. 123 (2019) 131302, arXiv:1809.08277]. While Wang and Unruh suggest an interesting alternative scenario and raise an important conceptual question, most of their critic... |
gr-qc/0310004 | Stefano Ansoldi | Stefano Ansoldi | WKB metastable quantum states of a de Sitter--Reissner-Nordstroem dust
shell | IOPart class, 16 figures | Class.Quant.Grav. 19 (2002) 6321-6344 | 10.1088/0264-9381/19/24/304 | null | gr-qc | null | We study the dynamics of a spherically symmetric dust shell separating two
spacetime domains, the 'interior' one being a part of the de Sitter spacetime
and the exterior one having the 'extremal' Reissner-Nordstroem geometry.
Extending the ideas of previous works on the subject, we show that the it is
possible to det... | [
{
"created": "Wed, 1 Oct 2003 13:46:04 GMT",
"version": "v1"
}
] | 2022-05-04 | [
[
"Ansoldi",
"Stefano",
""
]
] | We study the dynamics of a spherically symmetric dust shell separating two spacetime domains, the 'interior' one being a part of the de Sitter spacetime and the exterior one having the 'extremal' Reissner-Nordstroem geometry. Extending the ideas of previous works on the subject, we show that the it is possible to deter... |
0811.3068 | Zong-Kuan Guo | Zong-Kuan Guo, Nobuyoshi Ohta, Takashi Torii | Black Holes in the Dilatonic Einstein-Gauss-Bonnet Theory in Various
Dimensions II -- Asymptotically AdS Topological Black Holes -- | 24 pages, 8 figures, PTPTeX, typos corrected | Prog.Theor.Phys.121:253-273,2009 | 10.1143/PTP.121.253 | KU-TP 024 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study asymptotically AdS topological black hole solutions with k=0 (plane
symmetric) in the Einstein gravity with Gauss-Bonnet term, the dilaton and a
"cosmological constant" in various dimensions. We derive the field equations
for suitable ansatz for general D dimensions. We determine the parameter
regions includ... | [
{
"created": "Wed, 19 Nov 2008 09:19:50 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jan 2009 13:43:28 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Feb 2009 12:19:48 GMT",
"version": "v3"
}
] | 2009-12-04 | [
[
"Guo",
"Zong-Kuan",
""
],
[
"Ohta",
"Nobuyoshi",
""
],
[
"Torii",
"Takashi",
""
]
] | We study asymptotically AdS topological black hole solutions with k=0 (plane symmetric) in the Einstein gravity with Gauss-Bonnet term, the dilaton and a "cosmological constant" in various dimensions. We derive the field equations for suitable ansatz for general D dimensions. We determine the parameter regions includin... |
gr-qc/0411066 | Yongge Ma | Li-e Qiang, Yongge Ma, Muxin Han, Dan Yu | 5-dimensional Brans-Dicke Theory and Cosmic Acceleration | 13 pages, 4 figures, revised version to appear in PRD | Phys.Rev. D71 (2005) 061501 | 10.1103/PhysRevD.71.061501 | null | gr-qc astro-ph hep-th | null | We consider a 5-dimensional scalar-tensor theory which is a direct
generalization of the original 4-dimensional Brans-Dicke theory to
5-dimensions. By assuming that there is a hypersurface-orthogonal spacelike
Killing vector field in the underlying 5-dimensional spacetime, the theory is
reduced to a 4-dimensional the... | [
{
"created": "Sun, 14 Nov 2004 14:59:02 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Feb 2005 07:00:37 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Qiang",
"Li-e",
""
],
[
"Ma",
"Yongge",
""
],
[
"Han",
"Muxin",
""
],
[
"Yu",
"Dan",
""
]
] | We consider a 5-dimensional scalar-tensor theory which is a direct generalization of the original 4-dimensional Brans-Dicke theory to 5-dimensions. By assuming that there is a hypersurface-orthogonal spacelike Killing vector field in the underlying 5-dimensional spacetime, the theory is reduced to a 4-dimensional theor... |
2007.10068 | Tan Liu | Tan Liu, Wen Zhao, Yan Wang | Gravitational waveforms from the quasicircular inspiral of compact
binaries in massive Brans-Dicke theory | 23 pages, accepted for publication in PRD | Phys. Rev. D 102, 124035 (2020) | 10.1103/PhysRevD.102.124035 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We study the gravitational waves emitted by an inspiralling compact binary
system in massive Brans-Dicke theory. In addition to the two tensor
polarizations, which have been obtained in the previous work, we calculate
explicitly and analytically the expressions for the time-domain waveforms of
the two scalar polariza... | [
{
"created": "Mon, 20 Jul 2020 12:58:30 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2020 05:24:00 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Liu",
"Tan",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Yan",
""
]
] | We study the gravitational waves emitted by an inspiralling compact binary system in massive Brans-Dicke theory. In addition to the two tensor polarizations, which have been obtained in the previous work, we calculate explicitly and analytically the expressions for the time-domain waveforms of the two scalar polarizati... |
1703.06781 | Dr. Sudhaker Upadhyay | Sudhaker Upadhyay | Thermodynamics and galactic clustering with a modified gravitational
potential | 13 pages, 4 figures, revtex4 | Phys. Rev. D 95, 043008 (2017) | 10.1103/PhysRevD.95.043008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on thermodynamics, we study the galactic clustering of an expanding
Universe by considering the logarithmic and volume (quantum) corrections to
Newton's law along with the repulsive effect of a harmonic force induced by the
cosmological constant ($\Lambda$) in the formation of the large scale structure
of the U... | [
{
"created": "Fri, 17 Mar 2017 12:13:54 GMT",
"version": "v1"
}
] | 2017-03-22 | [
[
"Upadhyay",
"Sudhaker",
""
]
] | Based on thermodynamics, we study the galactic clustering of an expanding Universe by considering the logarithmic and volume (quantum) corrections to Newton's law along with the repulsive effect of a harmonic force induced by the cosmological constant ($\Lambda$) in the formation of the large scale structure of the Uni... |
gr-qc/0110048 | Ulrich H. Gerlach | Ulrich H. Gerlach | Radiation from Violently Accelerated Bodies | 29 pages, 1 figure, Revtex | Phys.Rev. D64 (2001) 105004 | 10.1103/PhysRevD.64.105004 | null | gr-qc | null | A determination is made of the radiation emitted by a linearly uniformly
accelerated uncharged dipole transmitter. It is found that, first of all, the
radiation rate is given by the familiar Larmor formula, but it is augmented by
an amount which becomes dominant for sufficiently high acceleration. For an
accelerated ... | [
{
"created": "Tue, 9 Oct 2001 17:38:08 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gerlach",
"Ulrich H.",
""
]
] | A determination is made of the radiation emitted by a linearly uniformly accelerated uncharged dipole transmitter. It is found that, first of all, the radiation rate is given by the familiar Larmor formula, but it is augmented by an amount which becomes dominant for sufficiently high acceleration. For an accelerated di... |
1011.1088 | Jose Luis Hernandez-Pastora | J.L. Hernandez-Pastora and J. Ospino | From geodesics of the multipole solutions to the perturbed Kepler
problem | null | Phys.Rev.D82:104001,2010 | 10.1103/PhysRevD.82.104001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A static and axisymmetric solution of the Einstein vacuum equations with a
finite number of Relativistic Multipole Moments (RMM) is written in MSA
coordinates up to certain order of approximation, and the structure of its
metric components is explicitly shown. From the equation of equatorial
geodesics we obtain the B... | [
{
"created": "Thu, 4 Nov 2010 09:21:51 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Hernandez-Pastora",
"J. L.",
""
],
[
"Ospino",
"J.",
""
]
] | A static and axisymmetric solution of the Einstein vacuum equations with a finite number of Relativistic Multipole Moments (RMM) is written in MSA coordinates up to certain order of approximation, and the structure of its metric components is explicitly shown. From the equation of equatorial geodesics we obtain the Bin... |
2210.02610 | Hee-Suk Cho | Hee-Suk Cho | Measurability of neutron star tidal deformability from merging neutron
star-black hole binaries | 16 pages, 19 figures, accepted for publication in PRD | null | 10.1103/PhysRevD.106.084056 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The neutron star-black hole binary (NSBH) system has been considered one of
the promising detection candidates for ground-based gravitational-wave (GW)
detectors such as LIGO and Virgo. The tidal effects of neutron stars (NSs) are
imprinted on the GW signals emitted from NSBHs as well as binary neutron stars.
In this... | [
{
"created": "Thu, 6 Oct 2022 00:00:21 GMT",
"version": "v1"
}
] | 2022-11-01 | [
[
"Cho",
"Hee-Suk",
""
]
] | The neutron star-black hole binary (NSBH) system has been considered one of the promising detection candidates for ground-based gravitational-wave (GW) detectors such as LIGO and Virgo. The tidal effects of neutron stars (NSs) are imprinted on the GW signals emitted from NSBHs as well as binary neutron stars. In this w... |
2005.03260 | Xisco Jim\'enez Forteza | Xisco Jim\'enez Forteza, Swetha Bhagwat, Paolo Pani, Valeria Ferrari | Spectroscopy of binary black hole ringdown using overtones and angular
modes | 18 pages, 14 figures. Version consistent with PRD | Phys. Rev. D 102, 044053 (2020) | 10.1103/PhysRevD.102.044053 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The black hole uniqueness and the no-hair theorems imply that the quasinormal
spectrum of any astrophysical black hole is determined solely by its mass and
spin. The countably infinite number of quasinormal modes of a Kerr black hole
are thus related to each other and any deviations from these relations provide
a str... | [
{
"created": "Thu, 7 May 2020 05:47:34 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Aug 2020 16:26:38 GMT",
"version": "v2"
}
] | 2020-08-31 | [
[
"Forteza",
"Xisco Jiménez",
""
],
[
"Bhagwat",
"Swetha",
""
],
[
"Pani",
"Paolo",
""
],
[
"Ferrari",
"Valeria",
""
]
] | The black hole uniqueness and the no-hair theorems imply that the quasinormal spectrum of any astrophysical black hole is determined solely by its mass and spin. The countably infinite number of quasinormal modes of a Kerr black hole are thus related to each other and any deviations from these relations provide a stron... |
1901.03602 | Alexey Toporensky | Elena Emtsova and Alexey Toporensky | Velocities of distant objects in General Relativity revisited | 13 pages, no figures, small improvement of the text | null | 10.1134/S0202289320010053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider two most popular definitions of velocities of remote objects in
General Relativity. Our work has two motivations. From a research point of
view, we generalize the formula connecting these two velocities in FRW metrics
found by Chodorowski to arbitrary synchronous spherically symmetric metrics.
From a meth... | [
{
"created": "Fri, 11 Jan 2019 14:51:16 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2019 13:53:26 GMT",
"version": "v2"
}
] | 2020-06-03 | [
[
"Emtsova",
"Elena",
""
],
[
"Toporensky",
"Alexey",
""
]
] | We consider two most popular definitions of velocities of remote objects in General Relativity. Our work has two motivations. From a research point of view, we generalize the formula connecting these two velocities in FRW metrics found by Chodorowski to arbitrary synchronous spherically symmetric metrics. From a method... |
0907.4686 | Adamantios Stavridis | Adamantios Stavridis, K. G. Arun, Clifford M. Will | Precessing supermassive black hole binaries and dark energy measurements
with LISA | 4 pages, 4 figures, version accepted to PRD | Phys.Rev.D80:067501,2009 | 10.1103/PhysRevD.80.067501 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin induced precessional modulations of gravitational wave signals from
supermassive black hole binaries can improve the estimation of luminosity
distance to the source by space based gravitational wave missions like the
Laser Interferometer Space Antenna (LISA). We study how this impacts the ablity
of LISA to do co... | [
{
"created": "Mon, 27 Jul 2009 16:23:26 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2009 08:22:17 GMT",
"version": "v2"
}
] | 2010-03-25 | [
[
"Stavridis",
"Adamantios",
""
],
[
"Arun",
"K. G.",
""
],
[
"Will",
"Clifford M.",
""
]
] | Spin induced precessional modulations of gravitational wave signals from supermassive black hole binaries can improve the estimation of luminosity distance to the source by space based gravitational wave missions like the Laser Interferometer Space Antenna (LISA). We study how this impacts the ablity of LISA to do cosm... |
1702.00432 | Behzad Eslam Panah | S. H. Hendi, R. B. Mann, S. Panahiyan and B. Eslam Panah | van der Waals like behaviour of topological AdS black holes in massive
gravity | 5 pages, 3 figures, Accepted for publication as a Rapid Communication
in PRD | Phys. Rev. D 95, 021501(R) (2017) | 10.1103/PhysRevD.95.021501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent developments in black hole thermodynamics, we investigate
van der Waals phase transitions of charged black holes in massive gravity. We
find that massive gravity theories can exhibit strikingly different
thermodynamic behaviour compared to that of Einstein gravity, and that the mass
of the gravito... | [
{
"created": "Wed, 1 Feb 2017 19:39:41 GMT",
"version": "v1"
}
] | 2017-02-03 | [
[
"Hendi",
"S. H.",
""
],
[
"Mann",
"R. B.",
""
],
[
"Panahiyan",
"S.",
""
],
[
"Panah",
"B. Eslam",
""
]
] | Motivated by recent developments in black hole thermodynamics, we investigate van der Waals phase transitions of charged black holes in massive gravity. We find that massive gravity theories can exhibit strikingly different thermodynamic behaviour compared to that of Einstein gravity, and that the mass of the graviton ... |
1403.5669 | Julio Cesar Fabris | J.C. Fabris, O.F. Piattella, D.C. Rodrigues, M.H. Daouda | Rastall's Cosmology and its Observational Constraints | 6 pages, 5 figures, submitted to the Proceedings of the CosmoSurII
conference, Valpara\'iso, Chile, 27 - 31 May 2013 | null | 10.1063/1.4913336 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Rastall's theory is a modification of General Relativity touching one of
the cornestone of gravity theory: the conservation laws. In Rastall's theory,
the energy-momentum tensor is not conserved anymore, depending now on the
gradient of the Ricci curvature. In this sense, this theory can be seen as a
classical im... | [
{
"created": "Sat, 22 Mar 2014 15:01:18 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Fabris",
"J. C.",
""
],
[
"Piattella",
"O. F.",
""
],
[
"Rodrigues",
"D. C.",
""
],
[
"Daouda",
"M. H.",
""
]
] | The Rastall's theory is a modification of General Relativity touching one of the cornestone of gravity theory: the conservation laws. In Rastall's theory, the energy-momentum tensor is not conserved anymore, depending now on the gradient of the Ricci curvature. In this sense, this theory can be seen as a classical impl... |
2205.07784 | Andrew Coates | Andrew Coates, Fethi M. Ramazano\u{g}lu | The intrinsic pathology of self-interacting vector fields | 5+4 pages, 3+2 figures. Minor changes to bring into line with
published version | Phys. Rev. Lett. 129, 151103 (2022) | 10.1103/PhysRevLett.129.151103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that self-interacting vector field theories exhibit unphysical
behaviour even when they are not coupled to any external field. This means any
theory featuring such vectors is in danger of being unphysical, an alarming
prospect for many proposals in cosmology, gravity, high energy physics and
beyond. The probl... | [
{
"created": "Mon, 16 May 2022 16:15:24 GMT",
"version": "v1"
},
{
"created": "Sun, 22 May 2022 15:25:59 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Jun 2022 21:22:53 GMT",
"version": "v3"
},
{
"created": "Tue, 4 Oct 2022 16:47:20 GMT",
"version": "v4"
}
] | 2022-10-05 | [
[
"Coates",
"Andrew",
""
],
[
"Ramazanoğlu",
"Fethi M.",
""
]
] | We show that self-interacting vector field theories exhibit unphysical behaviour even when they are not coupled to any external field. This means any theory featuring such vectors is in danger of being unphysical, an alarming prospect for many proposals in cosmology, gravity, high energy physics and beyond. The problem... |
1208.1433 | Sumanta Chakraborty | Sumanta Chakraborty and Soumitra Sengupta | Solar system constraints on alternative gravity theories | Thoroughly revised, Matches Published Version | Phys. Rev. D 89, 026003 (2014) | 10.1103/PhysRevD.89.026003 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The perihelion precession of planetary orbits and the bending angle of null
geodesics are estimated for different gravity theories in string-inspired
models. It is shown that, for dilaton coupled gravity, the leading order
measure in the angle of bending of light comes purely from vacuum expectation
value of the dila... | [
{
"created": "Sat, 4 Aug 2012 00:54:04 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Apr 2013 06:11:06 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Jan 2014 08:55:17 GMT",
"version": "v3"
}
] | 2014-01-15 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Sengupta",
"Soumitra",
""
]
] | The perihelion precession of planetary orbits and the bending angle of null geodesics are estimated for different gravity theories in string-inspired models. It is shown that, for dilaton coupled gravity, the leading order measure in the angle of bending of light comes purely from vacuum expectation value of the dilato... |
2301.13531 | Shivaraj Kandhasamy | Junaid Yousuf and Shivaraj Kandhasamy and Manzoor A Malik | Effects of calibration uncertainties on the detection and parameter
estimation of isotropic gravitational-wave backgrounds | 11 pages, 7 figures | null | 10.1103/PhysRevD.107.102002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational-wave backgrounds are expected to arise from the superposition
of gravitational wave signals from a large number of unresolved sources and
also from the stochastic processes that occurred in the Early universe. So far,
we have not detected any gravitational wave background, but with the
improvements in t... | [
{
"created": "Tue, 31 Jan 2023 10:25:57 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2023 11:18:22 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Yousuf",
"Junaid",
""
],
[
"Kandhasamy",
"Shivaraj",
""
],
[
"Malik",
"Manzoor A",
""
]
] | Gravitational-wave backgrounds are expected to arise from the superposition of gravitational wave signals from a large number of unresolved sources and also from the stochastic processes that occurred in the Early universe. So far, we have not detected any gravitational wave background, but with the improvements in the... |
2008.00945 | Thomas Celora | Thomas Celora, Nils Andersson and Greg L. Comer | Linearizing a Non-linear Formulation for General Relativistic
Dissipative Fluids | Final version as published on Classical and Quantum Gravity | null | 10.1088/1361-6382/abd7c1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fully non-linear equations of motion for dissipative general relativistic
multi-fluids can be obtained from an action principle involving the explicit
use of lower dimensional matter spaces. More traditional strategies for
incorporating dissipation-like the famous Mueller-Israel-Stewart model-are
based on expansions ... | [
{
"created": "Mon, 3 Aug 2020 15:25:34 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jan 2021 15:10:31 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Celora",
"Thomas",
""
],
[
"Andersson",
"Nils",
""
],
[
"Comer",
"Greg L.",
""
]
] | Fully non-linear equations of motion for dissipative general relativistic multi-fluids can be obtained from an action principle involving the explicit use of lower dimensional matter spaces. More traditional strategies for incorporating dissipation-like the famous Mueller-Israel-Stewart model-are based on expansions aw... |
1209.2979 | Julio Cesar Fabris | J.C. Fabris, G.T. Marques | Hawking radiation for non asymptotically flat dilatonic black holes
using gravitational anomaly | Latex file, 22 pages. Some discussions enlarged. New references.
Accepted for publication in the European Physical Journal C | null | 10.1140/epjc/s10052-012-2214-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $d$-dimensional scalar field action may be reduced, in the background
geometry of a black hole, to a 2-dimensional effective action. In the near
horizon region, it appears a gravitational anomaly: the energy-momentum tensor
of the scalar field is not conserved anymore. This anomaly is removed by
introducing a ter... | [
{
"created": "Thu, 13 Sep 2012 18:06:53 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Oct 2012 14:48:49 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Fabris",
"J. C.",
""
],
[
"Marques",
"G. T.",
""
]
] | The $d$-dimensional scalar field action may be reduced, in the background geometry of a black hole, to a 2-dimensional effective action. In the near horizon region, it appears a gravitational anomaly: the energy-momentum tensor of the scalar field is not conserved anymore. This anomaly is removed by introducing a term ... |
2305.04360 | H{\aa}kan Andr\'easson | E. Ames, H. Andr\'easson and O. Rinne | On the Hoop conjecture and the weak cosmic censorship conjecture for the
axisymmetric Einstein-Vlasov system | 18 pages, 7 figures | Phys. Rev. D 108, 064054 (2023) | 10.1103/PhysRevD.108.064054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider gravitational collapse for the axially symmetric Einstein-Vlasov
system. We investigate the weak cosmic censorship conjecture in the case of
highly prolate initial data and we investigate the ``only if" part of the Hoop
conjecture. Shapiro and Teukolsky initiated a similar study in 1991
\cite{Shapiro1991}... | [
{
"created": "Sun, 7 May 2023 19:38:23 GMT",
"version": "v1"
}
] | 2024-02-19 | [
[
"Ames",
"E.",
""
],
[
"Andréasson",
"H.",
""
],
[
"Rinne",
"O.",
""
]
] | We consider gravitational collapse for the axially symmetric Einstein-Vlasov system. We investigate the weak cosmic censorship conjecture in the case of highly prolate initial data and we investigate the ``only if" part of the Hoop conjecture. Shapiro and Teukolsky initiated a similar study in 1991 \cite{Shapiro1991} w... |
1510.06981 | Nelson Videla Dr. | Grigorios Panotopoulos and Nelson Videla | Warm $\frac{\lambda}{4}\phi^{4}$ inflationary universe model in light of
Planck 2015 results | 16 pages, 2 figures. Accepted for publication in EPJC | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we show that warm chaotic inflation characterized by a
simple $\frac{\lambda}{4}\phi^{4}$ self-interaction potential for the inflaton,
excluded by current data in standard cold inflation, and by an inflaton decay
rate proportional to the temperature, is in agreement with the latest Planck
data. Th... | [
{
"created": "Fri, 23 Oct 2015 16:13:28 GMT",
"version": "v1"
}
] | 2015-10-26 | [
[
"Panotopoulos",
"Grigorios",
""
],
[
"Videla",
"Nelson",
""
]
] | In the present work we show that warm chaotic inflation characterized by a simple $\frac{\lambda}{4}\phi^{4}$ self-interaction potential for the inflaton, excluded by current data in standard cold inflation, and by an inflaton decay rate proportional to the temperature, is in agreement with the latest Planck data. The ... |
2304.08676 | Bo-Qiang Ma | Jie Zhu, Bo-Qiang Ma | Trajectories of astroparticles in pseudo-Finsler spacetime with the most
general modified dispersion | 9 pages, no figure, version for journal publication. arXiv admin
note: text overlap with arXiv:2206.07616 | Eur. Phys. J. C 83 (2023) 349 | 10.1140/epjc/s10052-023-11517-8 | null | gr-qc astro-ph.HE hep-ph math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Finsler geometry is a natural and fundamental generalization of Riemann
geometry, and is a tool to research Lorentz invariance violation. We find the
connection between the most general modified dispersion relation and a
pseudo-Finsler structure, and then we calculate the arrival time delay of
astroparticles with dif... | [
{
"created": "Tue, 18 Apr 2023 00:58:18 GMT",
"version": "v1"
},
{
"created": "Mon, 1 May 2023 07:49:50 GMT",
"version": "v2"
}
] | 2023-05-02 | [
[
"Zhu",
"Jie",
""
],
[
"Ma",
"Bo-Qiang",
""
]
] | Finsler geometry is a natural and fundamental generalization of Riemann geometry, and is a tool to research Lorentz invariance violation. We find the connection between the most general modified dispersion relation and a pseudo-Finsler structure, and then we calculate the arrival time delay of astroparticles with diffe... |
1903.08435 | Mudassar Sabir | Mudassar Sabir, Waqas Ahmed, Yungui Gong and Yizhou Lu | $\alpha$-attractor from superconformal E-models in brane inflation | 11 pages, 3 figures | Eur. Phys. J. C 80, 15 (2020) | 10.1140/epjc/s10052-019-7589-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the large extra dimensional braneworld inflation, Friedmann equation is
modified to include a quadratic term in energy density with an additional
parameter $\lambda$ called brane tension in addition to the usual linear term.
The high energy brane corrections modify the slow-roll parameters and affect
the behaviour... | [
{
"created": "Wed, 20 Mar 2019 11:00:18 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jan 2020 13:13:44 GMT",
"version": "v2"
}
] | 2020-01-15 | [
[
"Sabir",
"Mudassar",
""
],
[
"Ahmed",
"Waqas",
""
],
[
"Gong",
"Yungui",
""
],
[
"Lu",
"Yizhou",
""
]
] | In the large extra dimensional braneworld inflation, Friedmann equation is modified to include a quadratic term in energy density with an additional parameter $\lambda$ called brane tension in addition to the usual linear term. The high energy brane corrections modify the slow-roll parameters and affect the behaviour o... |
1908.03349 | Titus K Mathew | Hareesh T, P.B. Krishna and Titus K Mathew | First Law of Thermodynamics and Emergence of Cosmic Space in a Non-Flat
Universe | 17 pages | null | 10.1088/1475-7516/2019/12/024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergence of cosmic space as cosmic time progresses is an exciting idea
advanced by Padmanabhan to explain the accelerated expansion of the universe.
The generalization of Padmanabhan's conjecture to the non-flat universe has
resulted in scepticism about the choice of volume such that the law of
emergence can not... | [
{
"created": "Fri, 9 Aug 2019 07:43:40 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Sep 2019 11:52:02 GMT",
"version": "v2"
}
] | 2019-12-18 | [
[
"T",
"Hareesh",
""
],
[
"Krishna",
"P. B.",
""
],
[
"Mathew",
"Titus K",
""
]
] | The emergence of cosmic space as cosmic time progresses is an exciting idea advanced by Padmanabhan to explain the accelerated expansion of the universe. The generalization of Padmanabhan's conjecture to the non-flat universe has resulted in scepticism about the choice of volume such that the law of emergence can not b... |
2302.00584 | Giacomo Pollari | Pollari Giacomo | A Nieh-Yan-like topological invariant in General Relativity | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present work we will introduce and prove a topological invariant term
in General Relativity involving the torsion tensor that has never been showed
before. Such a term is a slight modification of the Nieh-Yan four-form and
likewise it stems from a Chern-Simons three-form. We provide the proof in both
holonomic... | [
{
"created": "Wed, 1 Feb 2023 16:57:42 GMT",
"version": "v1"
}
] | 2023-02-02 | [
[
"Giacomo",
"Pollari",
""
]
] | In the present work we will introduce and prove a topological invariant term in General Relativity involving the torsion tensor that has never been showed before. Such a term is a slight modification of the Nieh-Yan four-form and likewise it stems from a Chern-Simons three-form. We provide the proof in both holonomic a... |
1112.6215 | Raf Guedens | Raf Guedens, Ted Jacobson and Sudipta Sarkar | Horizon entropy and higher curvature equations of state | 16 pages, 3 figures; minor improvements to presentation | null | 10.1103/PhysRevD.85.064017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Clausius relation between entropy change and heat flux has previously
been used to derive Einstein's field equations as an equation of state. In that
derivation the entropy is proportional to the area of a local causal horizon,
and the heat is the energy flux across the horizon, defined relative to an
approximate... | [
{
"created": "Thu, 29 Dec 2011 01:55:07 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jan 2012 23:02:10 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Guedens",
"Raf",
""
],
[
"Jacobson",
"Ted",
""
],
[
"Sarkar",
"Sudipta",
""
]
] | The Clausius relation between entropy change and heat flux has previously been used to derive Einstein's field equations as an equation of state. In that derivation the entropy is proportional to the area of a local causal horizon, and the heat is the energy flux across the horizon, defined relative to an approximate b... |
2212.07018 | Sajal Mukherjee | Sajal Mukherjee and Sumanta Chakraborty | Transition from inspiral to plunge for braneworld EMRI | 22 pages, 2 figures | Class. Quantum Grav. 40, 145013 (2023) | 10.1088/1361-6382/acdd47 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present article, we discuss the late inspiral and then the transition
regime to the plunge phase of a secondary, less massive compact object into a
more massive braneworld black hole, in the context of an extreme-mass-ratio
inspiral. We obtain the approximate expressions for fluxes due to slowly
evolving const... | [
{
"created": "Wed, 14 Dec 2022 04:13:41 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jun 2023 05:40:18 GMT",
"version": "v2"
}
] | 2023-06-29 | [
[
"Mukherjee",
"Sajal",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | In the present article, we discuss the late inspiral and then the transition regime to the plunge phase of a secondary, less massive compact object into a more massive braneworld black hole, in the context of an extreme-mass-ratio inspiral. We obtain the approximate expressions for fluxes due to slowly evolving constan... |
1811.11799 | Eugen Radu | C. Herdeiro, I. Perapechka, E. Radu and Ya. Shnir | Gravitating solitons and black holes with synchronised hair in the four
dimensional O(3) sigma-model | 24 pages, 7 figures | J. High Energ. Phys. (2019) 2019: 111 | 10.1007/JHEP02(2019)111 | DIAS-STP-18-17 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the $\mathrm{O}(3)$ non-linear sigma-model, composed of three
real scalar fields with a standard kinetic term and with a symmetry breaking
potential in four spacetime dimensions. We show that this simple, geometrically
motivated model, admits both self-gravitating, asymptotically flat,
non-topological sol... | [
{
"created": "Wed, 28 Nov 2018 19:47:48 GMT",
"version": "v1"
}
] | 2019-05-02 | [
[
"Herdeiro",
"C.",
""
],
[
"Perapechka",
"I.",
""
],
[
"Radu",
"E.",
""
],
[
"Shnir",
"Ya.",
""
]
] | We consider the $\mathrm{O}(3)$ non-linear sigma-model, composed of three real scalar fields with a standard kinetic term and with a symmetry breaking potential in four spacetime dimensions. We show that this simple, geometrically motivated model, admits both self-gravitating, asymptotically flat, non-topological solit... |
1902.04859 | C. Q. Geng | Chao-Qiang Geng, Wei-Cheng Hsu, Jhih-Rong Lu and Ling-Wei Luo | Thermodynamics of $f(R)$ Gravity with Disformal Transformation | 23 pages, no figure, published version in Entropy 21, 172 (2019) | Entropy 21, 172 (2019) | 10.3390/e21020172 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study thermodynamics in $f(R)$ gravity with the disformal transformation.
The transformation applied to the matter Lagrangian has the form of $\g_{\m\n}
= A(\phi,X)g_{\m\n} + B(\phi,X)\pa_\m\f\pa_\n\f$ with the assumption of the
Minkowski matter metric $\g_{\m\n} = \e_{\m\n}$, where $\phi$ is the disformal
scalar ... | [
{
"created": "Wed, 13 Feb 2019 11:00:50 GMT",
"version": "v1"
}
] | 2019-02-14 | [
[
"Geng",
"Chao-Qiang",
""
],
[
"Hsu",
"Wei-Cheng",
""
],
[
"Lu",
"Jhih-Rong",
""
],
[
"Luo",
"Ling-Wei",
""
]
] | We study thermodynamics in $f(R)$ gravity with the disformal transformation. The transformation applied to the matter Lagrangian has the form of $\g_{\m\n} = A(\phi,X)g_{\m\n} + B(\phi,X)\pa_\m\f\pa_\n\f$ with the assumption of the Minkowski matter metric $\g_{\m\n} = \e_{\m\n}$, where $\phi$ is the disformal scalar an... |
1911.06990 | Zahra Haghani | Zahra Haghani | Cosmology of the non-local Proca theory | 10 pages, 2 figures | Phys.Dark Univ. 32 (2021) 100817 | 10.1016/j.dark.2021.100817 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we will consider cosmological implications of the Maxwell
theory coupled to a non-local $U(1)$-symmetric term. It is well-known that the
theory in flat space time, reduces to the Proca theory. However, it will be
shown that in curved space time the resulting theory will differ from the
coupled Einstein... | [
{
"created": "Sat, 16 Nov 2019 08:23:24 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Nov 2019 07:02:06 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Apr 2021 08:21:42 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Apr 2022 10:43:46 GMT",
"version": "v4"
}
] | 2022-04-18 | [
[
"Haghani",
"Zahra",
""
]
] | In this paper, we will consider cosmological implications of the Maxwell theory coupled to a non-local $U(1)$-symmetric term. It is well-known that the theory in flat space time, reduces to the Proca theory. However, it will be shown that in curved space time the resulting theory will differ from the coupled Einstein-P... |
1911.01422 | Artyom Astashenok V | Artyom V. Astashenok, Alexander S. Tepliakov | Some models of holographic dark energy on the Randall-Sundrum brane and
observational data | 12 pp., 5 figs., 3 tables, accepted in Int. J. Mod. Phys. D | null | 10.1142/S0218271819501761 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The some models of holographic dark energy for Randall-Sandrum brane are
considered. For first class of dark energy models we take energy density in
form $\sim L^{2\gamma-4}$ where $L$ is size of events horizon in Universe and
$\gamma$ is parameter (Tsallis holographic energy). Analysis of observational
data allows t... | [
{
"created": "Mon, 4 Nov 2019 14:50:02 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Tepliakov",
"Alexander S.",
""
]
] | The some models of holographic dark energy for Randall-Sandrum brane are considered. For first class of dark energy models we take energy density in form $\sim L^{2\gamma-4}$ where $L$ is size of events horizon in Universe and $\gamma$ is parameter (Tsallis holographic energy). Analysis of observational data allows to ... |
2404.14335 | David Kubiznak | David Kubiznak, Otakar Sv\'itek, Tayebeh Tahamtan | Regularized Conformal Electrodynamics: Novel C-metric in (2+1)
Dimensions | 10 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Conformal electrodynamics is a particularly interesting example of power
Maxwell non-linear electrodynamics, designed to possess conformal symmetry in
all dimensions. In this paper, we propose a regularized version of Conformal
electrodynamics, minimally regularizing the field of a point charge at the
origin by break... | [
{
"created": "Mon, 22 Apr 2024 16:52:34 GMT",
"version": "v1"
}
] | 2024-04-23 | [
[
"Kubiznak",
"David",
""
],
[
"Svítek",
"Otakar",
""
],
[
"Tahamtan",
"Tayebeh",
""
]
] | Conformal electrodynamics is a particularly interesting example of power Maxwell non-linear electrodynamics, designed to possess conformal symmetry in all dimensions. In this paper, we propose a regularized version of Conformal electrodynamics, minimally regularizing the field of a point charge at the origin by breakin... |
1311.3053 | Liu Zhao | Wei Xu, Hao Xu and Liu Zhao | Gauss-Bonnet coupling constant as a free thermodynamical variable and
the associated criticality | 23 pages. V2: modified all P_{GB}-r_+ plots using dimensionless
variables, added comments on the relationship to Einstein limit | Eur. Phys. J. C (2014) 74:2970 | 10.1140/epjc/s10052-014-2970-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic phase space of Gauss-Bonnet (GB) AdS black holes is
extended, taking the inverse of the GB coupling constant as a new thermodynamic
pressure $P_{\mathrm{GB}}$. We studied the critical behavior associated with
$P_{\mathrm{GB}}$ in the extended thermodynamic phase space at fixed
cosmological constant ... | [
{
"created": "Wed, 13 Nov 2013 09:20:18 GMT",
"version": "v1"
},
{
"created": "Mon, 12 May 2014 07:11:44 GMT",
"version": "v2"
}
] | 2014-08-19 | [
[
"Xu",
"Wei",
""
],
[
"Xu",
"Hao",
""
],
[
"Zhao",
"Liu",
""
]
] | The thermodynamic phase space of Gauss-Bonnet (GB) AdS black holes is extended, taking the inverse of the GB coupling constant as a new thermodynamic pressure $P_{\mathrm{GB}}$. We studied the critical behavior associated with $P_{\mathrm{GB}}$ in the extended thermodynamic phase space at fixed cosmological constant an... |
gr-qc/0412114 | C\'edric Deffayet | Cedric Deffayet | Cosmological perturbations of brane-induced gravity and the vDVZ
discontinuity on FLRW space-times | 36 pages, v.2, typos corrected | Phys.Rev.D71:103501,2005 | 10.1103/PhysRevD.71.103501 | null | gr-qc astro-ph hep-th | null | We investigate the cosmological perturbations of the brane-induced
(Dvali-Gabadadze-Porrati) model which exhibits a van Dam-Veltman-Zakharov
(vDVZ) discontinuity when linearized over a Minkowski background. We show that
the linear brane scalar cosmological perturbations over an arbitrary
Friedmann-Lemaitre-Robertson-... | [
{
"created": "Wed, 22 Dec 2004 18:29:16 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2005 16:37:56 GMT",
"version": "v2"
}
] | 2009-10-07 | [
[
"Deffayet",
"Cedric",
""
]
] | We investigate the cosmological perturbations of the brane-induced (Dvali-Gabadadze-Porrati) model which exhibits a van Dam-Veltman-Zakharov (vDVZ) discontinuity when linearized over a Minkowski background. We show that the linear brane scalar cosmological perturbations over an arbitrary Friedmann-Lemaitre-Robertson-Wa... |
0906.2919 | Piotr Bizon | Piotr Bizon, Tadeusz Chmaj, Andrzej Rostworowski, Stanislaw Zajac | Late-time tails of wave maps coupled to gravity | 7 pages, 3 figures | Class.Quant.Grav.26:225015,2009 | 10.1088/0264-9381/26/22/225015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the late-time asymptotic behavior for solutions of Einstein's
equations with the wave map matter. Solutions starting from small compactly
supported $\ell$-equivariant initial data with $\ell\geq 1$ are shown to decay
as $t^{-(2\ell+2)}$ at future timelike infinity and as $u^{-(\ell+1)}$ at
future null inf... | [
{
"created": "Tue, 16 Jun 2009 13:01:56 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Bizon",
"Piotr",
""
],
[
"Chmaj",
"Tadeusz",
""
],
[
"Rostworowski",
"Andrzej",
""
],
[
"Zajac",
"Stanislaw",
""
]
] | We consider the late-time asymptotic behavior for solutions of Einstein's equations with the wave map matter. Solutions starting from small compactly supported $\ell$-equivariant initial data with $\ell\geq 1$ are shown to decay as $t^{-(2\ell+2)}$ at future timelike infinity and as $u^{-(\ell+1)}$ at future null infin... |
2403.09373 | Tatsuya Daniel | Tatsuya Daniel, Leah Jenks | Gravitational Waves in Chern-Simons-Gauss-Bonnet Gravity | 15 pages, 1 figure | Phys. Rev. D 109 (2024) 12, 124012 | 10.1103/PhysRevD.109.124012 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that the four-dimensional effective field theory arising from
heterotic string theory is general relativity with both a Chern-Simons and
Gauss-Bonnet term. We study the propagation of gravitational waves in this
combination of Chern-Simons and Gauss-Bonnet gravity, both of which have an
associated scalar ... | [
{
"created": "Thu, 14 Mar 2024 13:20:35 GMT",
"version": "v1"
}
] | 2024-07-09 | [
[
"Daniel",
"Tatsuya",
""
],
[
"Jenks",
"Leah",
""
]
] | It is known that the four-dimensional effective field theory arising from heterotic string theory is general relativity with both a Chern-Simons and Gauss-Bonnet term. We study the propagation of gravitational waves in this combination of Chern-Simons and Gauss-Bonnet gravity, both of which have an associated scalar fi... |
0706.4431 | Luca Parisi | Luca Parisi, Marco Bruni, Roy Maartens, Kevin Vandersloot | The Einstein static universe in Loop Quantum Cosmology | 12 pages, 7 figures; v2: minor changes to match published version in
Classical and Quantum Gravity | Class.Quant.Grav.24:6243-6254,2007 | 10.1088/0264-9381/24/24/007 | null | gr-qc astro-ph hep-th | null | Loop Quantum Cosmology strongly modifies the high-energy dynamics of
Friedman-Robertson-Walker models and removes the big-bang singularity. We
investigate how LQC corrections affect the stability properties of the Einstein
static universe. In General Relativity, the Einstein static model with positive
cosmological co... | [
{
"created": "Fri, 29 Jun 2007 14:32:47 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jan 2008 14:00:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Parisi",
"Luca",
""
],
[
"Bruni",
"Marco",
""
],
[
"Maartens",
"Roy",
""
],
[
"Vandersloot",
"Kevin",
""
]
] | Loop Quantum Cosmology strongly modifies the high-energy dynamics of Friedman-Robertson-Walker models and removes the big-bang singularity. We investigate how LQC corrections affect the stability properties of the Einstein static universe. In General Relativity, the Einstein static model with positive cosmological cons... |
1309.1918 | N Khusnutdinov | Nail Khusnutdinov | Bremstrahlung in wormhole spacetime with infinitely short throat | 11p, 3 figures | Phys. Rev. D89, 024012 (2014) | 10.1103/PhysRevD.89.024012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the total energy loss and spectral density of uniformly moving
electrically charged particles in the spacetime of a wormhole with an
infinitely short throat. We show that the total energy loss $\mathcal{E} \sim
e^2v\gamma a^2/b^3$, where $\gamma$ is relativistic factor, $a$ is the radius
of the wormhole's... | [
{
"created": "Sat, 7 Sep 2013 23:36:23 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jan 2014 22:23:57 GMT",
"version": "v2"
}
] | 2014-01-17 | [
[
"Khusnutdinov",
"Nail",
""
]
] | We consider the total energy loss and spectral density of uniformly moving electrically charged particles in the spacetime of a wormhole with an infinitely short throat. We show that the total energy loss $\mathcal{E} \sim e^2v\gamma a^2/b^3$, where $\gamma$ is relativistic factor, $a$ is the radius of the wormhole's t... |
1802.00492 | Ott Vilson | Laur J\"arv, Mihkel R\"unkla, Margus Saal and Ott Vilson | Nonmetricity formulation of general relativity and its scalar-tensor
extension | 7 pages, 2 figures, REVTeX, clarifications and references added,
version accepted for publication in PRD | Phys. Rev. D 97, 124025 (2018) | 10.1103/PhysRevD.97.124025 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's celebrated theory of gravitation can be presented in three forms:
general relativity, teleparallel gravity, and the rarely considered before
symmetric teleparallel gravity. Extending the latter, we introduce a new class
of theories where a scalar field is coupled nonminimally to nonmetricity $Q$,
which her... | [
{
"created": "Thu, 1 Feb 2018 21:26:57 GMT",
"version": "v1"
},
{
"created": "Thu, 10 May 2018 20:10:59 GMT",
"version": "v2"
}
] | 2018-06-12 | [
[
"Järv",
"Laur",
""
],
[
"Rünkla",
"Mihkel",
""
],
[
"Saal",
"Margus",
""
],
[
"Vilson",
"Ott",
""
]
] | Einstein's celebrated theory of gravitation can be presented in three forms: general relativity, teleparallel gravity, and the rarely considered before symmetric teleparallel gravity. Extending the latter, we introduce a new class of theories where a scalar field is coupled nonminimally to nonmetricity $Q$, which here ... |
1607.08466 | Louis Witten | Louis Witten | On a New Formulation of Vacuum Axisymmetric Solutions of general
Relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Axisymmetric Solutions of the vacuum Einstein equations are found in the
Papapetrou-Weyl gauge. The solutions depend on two pairs of functionals, each
pair of two functions depends on a different arbitrarily chosen function of one
variable. Some examples are given.
| [
{
"created": "Thu, 28 Jul 2016 14:14:21 GMT",
"version": "v1"
}
] | 2016-07-29 | [
[
"Witten",
"Louis",
""
]
] | Axisymmetric Solutions of the vacuum Einstein equations are found in the Papapetrou-Weyl gauge. The solutions depend on two pairs of functionals, each pair of two functions depends on a different arbitrarily chosen function of one variable. Some examples are given. |
2201.01957 | Salvatore Capozziello | H. Abedi, S. Capozziello, M. Capriolo, and A. M. Abbassi | Gravitational energy-momentum pseudo-tensor in Palatini and metric
$f(R)$ gravity | 9 pages | null | 10.1016/j.aop.2022.168796 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the gravitational energy-momentum pseudo-tensor
$\tau^\mu_{\phantom{\mu}\nu}$ in both Palatini and metric approaches to $f(R)$
gravity. We then obtain the related cosmological gravitational energy density.
Considering a flat Friedmann-Lema\^itre-Robertson-Walker spacetime, the energy
density complex of matt... | [
{
"created": "Thu, 6 Jan 2022 07:49:57 GMT",
"version": "v1"
}
] | 2022-03-02 | [
[
"Abedi",
"H.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Capriolo",
"M.",
""
],
[
"Abbassi",
"A. M.",
""
]
] | We derive the gravitational energy-momentum pseudo-tensor $\tau^\mu_{\phantom{\mu}\nu}$ in both Palatini and metric approaches to $f(R)$ gravity. We then obtain the related cosmological gravitational energy density. Considering a flat Friedmann-Lema\^itre-Robertson-Walker spacetime, the energy density complex of matter... |
1207.4891 | Matthew J. Lake Dr | Matthew Lake and Jun'ichi Yokoyama | Cosmic strings with twisted magnetic flux lines and wound-strings in
extra dimensions | 34 pages, no figures. Revised text incorporating the results included
in erratum JCAP 08 (2013) E01 | JCAP 09 (2012) 030 [JCAP 08 (2013) E01] | 10.1088/1475-7516/2012/09/030 | RESCEU-37/12 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a generalization of the Nielsen-Olesen ansatz, in an
abelian-Higgs model with externally coupled charge, which describes strings
with twisted magnetic flux lines in the vortex core. The solution does not
possess cylindrical symmetry, which leads to the existence of components of
conserved momentum, both a... | [
{
"created": "Fri, 20 Jul 2012 09:37:45 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Aug 2012 12:08:38 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Oct 2012 07:39:03 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Jul 2013 08:24:44 GMT",
"version": "v4"
},
{
"cre... | 2015-09-30 | [
[
"Lake",
"Matthew",
""
],
[
"Yokoyama",
"Jun'ichi",
""
]
] | We consider a generalization of the Nielsen-Olesen ansatz, in an abelian-Higgs model with externally coupled charge, which describes strings with twisted magnetic flux lines in the vortex core. The solution does not possess cylindrical symmetry, which leads to the existence of components of conserved momentum, both aro... |
2405.06035 | David Hilditch | David Hilditch | Solving the Einstein Equations Numerically | 36 pages, 2 figures. Invited chapter for the edited book "New
Frontiers in GRMHD Simulations" (Eds. C. Bambi, Y. Mizuno, S. Shashank and F.
Yuan, Springer Singapore, expected in 2024) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are many complementary approaches to the construction of solutions to
the field equations of general relativity. Among these, numerical approximation
offers the only possibility to compute a variety of dynamical spacetimes, and
so has come to play an important role for theory and experiment alike.
Presently we ... | [
{
"created": "Thu, 9 May 2024 18:10:02 GMT",
"version": "v1"
}
] | 2024-05-13 | [
[
"Hilditch",
"David",
""
]
] | There are many complementary approaches to the construction of solutions to the field equations of general relativity. Among these, numerical approximation offers the only possibility to compute a variety of dynamical spacetimes, and so has come to play an important role for theory and experiment alike. Presently we gi... |
1207.1177 | Kourosh Nozari | Kourosh Nozari and Sara Islamzadeh | Tunneling of massive and charged particles from noncommutative
Reissner-Nordstr\"{o}m black hole | 10 pages, 2 figures | Astrophys. Space Sci. 347 (2013) 299 | 10.1007/s10509-013-1532-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Massive charged and uncharged particles tunneling from commutative
Reissner-Nordstrom black hole horizon has been studied with details in
literature. Here, by adopting the coherent state picture of spacetime
noncommutativity, we study tunneling of massive and charged particles from a
noncommutative inspired Reissner-... | [
{
"created": "Thu, 5 Jul 2012 07:36:20 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Nozari",
"Kourosh",
""
],
[
"Islamzadeh",
"Sara",
""
]
] | Massive charged and uncharged particles tunneling from commutative Reissner-Nordstrom black hole horizon has been studied with details in literature. Here, by adopting the coherent state picture of spacetime noncommutativity, we study tunneling of massive and charged particles from a noncommutative inspired Reissner-No... |
1005.2904 | Debraj Roy | Rabin Banerjee, Debraj Roy, Saurav Samanta | Lagrangian generators of the Poincare gauge symmetries | Latex2e, 15 pages, 1 figure; (v2) Appendix containing discussion on
applications of Lagrangian generators added | Phys.Rev.D82:044012,2010 | 10.1103/PhysRevD.82.044012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have systematically computed the generators of the symmetries arising in
Poincare gauge theory formulation of gravity, both in 2+1 and 3+1 dimensions.
This was done using a completely Lagrangian approach. The results are expected
to be valid in any dimensions, as seen through lifting the results of the 2+1
dimensi... | [
{
"created": "Mon, 17 May 2010 12:31:31 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Aug 2010 17:03:24 GMT",
"version": "v2"
}
] | 2010-08-10 | [
[
"Banerjee",
"Rabin",
""
],
[
"Roy",
"Debraj",
""
],
[
"Samanta",
"Saurav",
""
]
] | We have systematically computed the generators of the symmetries arising in Poincare gauge theory formulation of gravity, both in 2+1 and 3+1 dimensions. This was done using a completely Lagrangian approach. The results are expected to be valid in any dimensions, as seen through lifting the results of the 2+1 dimension... |
gr-qc/0002022 | Ulf Nilsson | U. S. Nilsson and C. Uggla | General Relativistic Stars : Polytropic Equations of State | 31 pages, 10 figures | Annals Phys. 286 (2001) 292-319 | 10.1006/aphy.2000.6090 | null | gr-qc | null | In this paper, the gravitational field equations for static spherically
symmetric perfect fluid models with a polytropic equation of state,
$p=k\rho^{1+1/n}$, are recast into two complementary 3-dimensional {\it
regular} systems of ordinary differential equations on compact state spaces.
The systems are analyzed nume... | [
{
"created": "Fri, 4 Feb 2000 12:32:46 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Nilsson",
"U. S.",
""
],
[
"Uggla",
"C.",
""
]
] | In this paper, the gravitational field equations for static spherically symmetric perfect fluid models with a polytropic equation of state, $p=k\rho^{1+1/n}$, are recast into two complementary 3-dimensional {\it regular} systems of ordinary differential equations on compact state spaces. The systems are analyzed numeri... |
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