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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2309.04203 | Dionysios Kokkinos | D. Kokkinos and T. Papakostas | Carter's case [D] admits the 2nd Canonical Form of the Killing Tensor | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of the Canonical Forms of the Killing Tensor concerns the
simultaneous resolving of the Integrability Conditions of the Killing Tensor
along with the Einstein's Field Equations employing the framework of
Newman-Penrose Formalism. We present all the Petrov Types admitting the 2nd and
3rd Canonical Forms of K... | [
{
"created": "Fri, 8 Sep 2023 08:28:02 GMT",
"version": "v1"
}
] | 2023-09-11 | [
[
"Kokkinos",
"D.",
""
],
[
"Papakostas",
"T.",
""
]
] | The study of the Canonical Forms of the Killing Tensor concerns the simultaneous resolving of the Integrability Conditions of the Killing Tensor along with the Einstein's Field Equations employing the framework of Newman-Penrose Formalism. We present all the Petrov Types admitting the 2nd and 3rd Canonical Forms of Kil... |
1809.03810 | Shoulong Li | Shou-Long Li and Hao Wei | Holographic Entanglement Entropy and Van der Waals transitions in
Einstein-Maxwell-dilaton theory | Latex, 25 pages, 7 figures, published version | Phys. Rev. D 99, 064002 (2019) | 10.1103/PhysRevD.99.064002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to the gauge/gravity duality, the Van der Waals transition of
charged AdS black holes in extended phase space is conjectured to be dual to a
renormalization group flow on the space of field theories. So exploring the Van
der Waals transition is potentially valuable for studying holographic
properties of cha... | [
{
"created": "Tue, 11 Sep 2018 12:16:12 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Mar 2019 11:36:42 GMT",
"version": "v2"
}
] | 2019-03-13 | [
[
"Li",
"Shou-Long",
""
],
[
"Wei",
"Hao",
""
]
] | According to the gauge/gravity duality, the Van der Waals transition of charged AdS black holes in extended phase space is conjectured to be dual to a renormalization group flow on the space of field theories. So exploring the Van der Waals transition is potentially valuable for studying holographic properties of charg... |
2407.03617 | Zeeshan Gul | M. Zeeshan Gul, M. Sharif and Adeeba Arooj | Physical Analysis of Spherical Stellar Structures in
$f(\mathrm{Q},\mathrm{T})$ Theory | 46 pages, 14 figures | Gen. Relativ. Gravit. 56(2024)45 | 10.1007/s10714-024-03234-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the viability and stability of compact stellar objects
characterized by anisotropic matter in the framework of
$f(\mathrm{Q},\mathrm{T})$ theory, where $\mathrm{Q}$ denotes non-metricity and
$\mathrm{T}$ represents the trace of the energy-momentum tensor. We consider a
specific model of this theor... | [
{
"created": "Thu, 4 Jul 2024 04:00:33 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Gul",
"M. Zeeshan",
""
],
[
"Sharif",
"M.",
""
],
[
"Arooj",
"Adeeba",
""
]
] | This paper explores the viability and stability of compact stellar objects characterized by anisotropic matter in the framework of $f(\mathrm{Q},\mathrm{T})$ theory, where $\mathrm{Q}$ denotes non-metricity and $\mathrm{T}$ represents the trace of the energy-momentum tensor. We consider a specific model of this theory ... |
gr-qc/0402094 | Hongsu Kim | Hongsu Kim, Hyung Mok Lee | Bonnor-type Black Dihole Solution in Brans-Dicke-Maxwell Theory | 29 pages, Revtex4, Int. J. Mod. Phys. A (IJMPA), in press | Int.J.Mod.Phys. A20 (2005) 6461-6485 | 10.1142/S0217751X05025413 | null | gr-qc astro-ph hep-th | null | It was originally thought that Bonnor's solution in Einstein-Maxwell theory
describes a singular point-like magnetic dipole. Lately, however, it has been
demonstrated that indeed it may describe a black {\it dihole}, i.e., a pair of
static, oppositely-charged extremal black holes with regular horizons.
Motivated part... | [
{
"created": "Mon, 23 Feb 2004 07:44:48 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jun 2005 04:10:17 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Kim",
"Hongsu",
""
],
[
"Lee",
"Hyung Mok",
""
]
] | It was originally thought that Bonnor's solution in Einstein-Maxwell theory describes a singular point-like magnetic dipole. Lately, however, it has been demonstrated that indeed it may describe a black {\it dihole}, i.e., a pair of static, oppositely-charged extremal black holes with regular horizons. Motivated partic... |
1412.3251 | Jan Steinhoff | Jan Steinhoff | Spin and quadrupole contributions to the motion of astrophysical
binaries | 43 pages. Proceedings of the 524. WE-Heraeus-Seminar "Equations of
Motion in Relativistic Gravity". v2: fixed reference. v3: corrected typos in
eqs. (1), (57), (85) | null | 10.1007/978-3-319-18335-0_19 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compact objects in general relativity approximately move along geodesics of
spacetime. It is shown that the corrections to geodesic motion due to spin
(dipole), quadrupole, and higher multipoles can be modeled by an extension of
the point mass action. The quadrupole contributions are discussed in detail for
astrophys... | [
{
"created": "Wed, 10 Dec 2014 10:43:00 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Dec 2014 09:29:10 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jul 2016 00:03:39 GMT",
"version": "v3"
}
] | 2021-04-07 | [
[
"Steinhoff",
"Jan",
""
]
] | Compact objects in general relativity approximately move along geodesics of spacetime. It is shown that the corrections to geodesic motion due to spin (dipole), quadrupole, and higher multipoles can be modeled by an extension of the point mass action. The quadrupole contributions are discussed in detail for astrophysic... |
2012.15004 | Yuuki Sugiyama | Yuuki Sugiyama, Kazuhiro Yamamoto, Tsutomu Kobayashi | Gravitational waves in Kasner spacetimes and Rindler wedges in
Regge-Wheeler gauge: Unruh effect | 23 pages, 1 figure | Phys. Rev. D 103, 083503 (2021) | 10.1103/PhysRevD.103.083503 | RUP-20-35 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the solutions of gravitational waves in the future (F) expanding
and the past (P) shrinking Kanser spacetimes as well as in the left (L) and
right (R) Rindler wedges in the Regge-Wheeler gauge. The solutions for all
metric components are obtained in an analytic form in each region. We identify
the master va... | [
{
"created": "Wed, 30 Dec 2020 02:00:57 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2021 08:54:47 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Apr 2021 02:58:05 GMT",
"version": "v3"
}
] | 2021-04-14 | [
[
"Sugiyama",
"Yuuki",
""
],
[
"Yamamoto",
"Kazuhiro",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | We derive the solutions of gravitational waves in the future (F) expanding and the past (P) shrinking Kanser spacetimes as well as in the left (L) and right (R) Rindler wedges in the Regge-Wheeler gauge. The solutions for all metric components are obtained in an analytic form in each region. We identify the master vari... |
1212.6433 | Y. Jack Ng | Y. Jack Ng | MoNDian Dark Matter, Entropic Gravity, and Infinite Statistics | 4 pages; LaTex; talk at 13th Marcel Grossmann Meeting and at Miami
2012 Conference, based on recent work done with CM Ho and D Minic
(arXiv:1005.3537, 1105.2916, 1201.2365); a similar version will appear in the
Proceedings of the 13th Marcel Grossmann Meeting | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the concept of MoNDian dark matter which behaves like cold dark
matter at cluster and cosmic scales but emulates modified Newtonian dynamics at
the galactic scale. The connection between global physics and local galactic
dynamics is implemented via entropic gravity. We also give an alternative
formulation ... | [
{
"created": "Thu, 27 Dec 2012 21:14:13 GMT",
"version": "v1"
}
] | 2013-01-01 | [
[
"Ng",
"Y. Jack",
""
]
] | We propose the concept of MoNDian dark matter which behaves like cold dark matter at cluster and cosmic scales but emulates modified Newtonian dynamics at the galactic scale. The connection between global physics and local galactic dynamics is implemented via entropic gravity. We also give an alternative formulation of... |
0808.3337 | Sergey Kozyrev | S.N. Andrianov, V.V. Bochkarev, S.M. Kozyrev | Quantum equation of motion for a particle in the field of primordial
fluctuations | 8 pages, 3 figures | null | 10.1117/12.801754 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Brane model of universe is considered for a particle. Conservation laws
inside the brane are obtained. Equation of motion is derived for a particle
using variation principle from these conservation laws. This equation includes
terms accounting the variation of brane topology. Its solution is obtained at
some approxim... | [
{
"created": "Mon, 25 Aug 2008 11:41:22 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Andrianov",
"S. N.",
""
],
[
"Bochkarev",
"V. V.",
""
],
[
"Kozyrev",
"S. M.",
""
]
] | Brane model of universe is considered for a particle. Conservation laws inside the brane are obtained. Equation of motion is derived for a particle using variation principle from these conservation laws. This equation includes terms accounting the variation of brane topology. Its solution is obtained at some approximat... |
1510.01911 | Filip Hejda | Ji\v{r}\'i Bi\v{c}\'ak and Filip Hejda | Near-horizon description of extremal magnetised stationary black holes
and Meissner effect | Added one reference and some details to fit the journal version | Phys. Rev. D 92, 104006 (2015) | 10.1103/PhysRevD.92.104006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a brief summary of the basic properties of stationary spacetimes
representing rotating, charged black holes in strong axisymmetric magnetic
fields, we concentrate on extremal cases, for which the horizon surface gravity
vanishes. We investigate their properties by constructing simpler spacetimes
that exhibit th... | [
{
"created": "Wed, 7 Oct 2015 12:07:25 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Nov 2015 10:49:47 GMT",
"version": "v2"
}
] | 2015-11-06 | [
[
"Bičák",
"Jiří",
""
],
[
"Hejda",
"Filip",
""
]
] | After a brief summary of the basic properties of stationary spacetimes representing rotating, charged black holes in strong axisymmetric magnetic fields, we concentrate on extremal cases, for which the horizon surface gravity vanishes. We investigate their properties by constructing simpler spacetimes that exhibit thei... |
2407.04750 | Nivaldo Agostinho Lemos | A. M. Silva, M. J. Rebou\c{c}as and N. A. Lemos | Violation of Causality in $f(Q)$ Gravity | 19 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | There is ongoing interest in the nonmetricity formulation of gravity. The
nonlinear extension of the theory, called $f(Q)$ gravity, has recently been
proposed and offers a promising avenue for addressing some of the long-standing
challenges in cosmology and fundamental physics. A number of solutions have
already been... | [
{
"created": "Thu, 4 Jul 2024 22:09:57 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Silva",
"A. M.",
""
],
[
"Rebouças",
"M. J.",
""
],
[
"Lemos",
"N. A.",
""
]
] | There is ongoing interest in the nonmetricity formulation of gravity. The nonlinear extension of the theory, called $f(Q)$ gravity, has recently been proposed and offers a promising avenue for addressing some of the long-standing challenges in cosmology and fundamental physics. A number of solutions have already been f... |
1712.09706 | Viktor G. Czinner | Tam\'as S. Bir\'o, Viktor G. Czinner, Hideo Iguchi and P\'eter V\'an | Black hole horizons can hide positive heat capacity | 5 pages, no figures, to be published in Phys. Lett. B | Physics Letters B, V782:228-231, 2018 | 10.1016/j.physletb.2018.05.035 | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regarding the volume as independent thermodynamic variable we point out that
black hole horizons can hide positive heat capacity and specific heat. Such
horizons are mechanically marginal, but thermally stable. In the absence of a
canonical volume definition, we consider various suggestions scaling
differently with t... | [
{
"created": "Wed, 27 Dec 2017 23:09:43 GMT",
"version": "v1"
},
{
"created": "Fri, 11 May 2018 14:18:30 GMT",
"version": "v2"
}
] | 2020-02-06 | [
[
"Biró",
"Tamás S.",
""
],
[
"Czinner",
"Viktor G.",
""
],
[
"Iguchi",
"Hideo",
""
],
[
"Ván",
"Péter",
""
]
] | Regarding the volume as independent thermodynamic variable we point out that black hole horizons can hide positive heat capacity and specific heat. Such horizons are mechanically marginal, but thermally stable. In the absence of a canonical volume definition, we consider various suggestions scaling differently with the... |
gr-qc/0701066 | Muhammad Sharif | Asghar Qadir and M. Sharif | The Relativistic Generalization of the Gravitational Force for Arbitrary
Spacetimes | 16 pages | NuovoCim.B107:1071-1083,1992 | 10.1007/BF02727045 | null | gr-qc | null | It has been suggested that re-expressing relativity in terms of forces could
provide fresh insights. The formalism developed for this purpose only applied
to static, or conformally static, space-times. Here we extend it to arbitrary
space-times. It is hoped that this formalism may lead to a workable definition
of mas... | [
{
"created": "Fri, 12 Jan 2007 08:05:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Qadir",
"Asghar",
""
],
[
"Sharif",
"M.",
""
]
] | It has been suggested that re-expressing relativity in terms of forces could provide fresh insights. The formalism developed for this purpose only applied to static, or conformally static, space-times. Here we extend it to arbitrary space-times. It is hoped that this formalism may lead to a workable definition of mass ... |
2305.08163 | Hoang Nguyen | Hoang Ky Nguyen | Buchdahl-inspired spacetimes and wormholes: Unearthing Hans Buchdahl's
other 'hidden' treasure trove | Honorable Mention -- 2023 GRF Awards for Essays on Gravitation.
Accepted for publishing in Oct 2023 Special Issue of Int.J.Mod.Phys.D | Int. J. Mod. Phys. D (2023) 2342007 | 10.1142/S0218271823420075 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Circa 1962 Hans A. Buchdahl pioneered a program -- and made significant
progress -- seeking vacuo configurations in pure $\mathcal{R}^{2}$ gravity [H.
A. Buchdahl, Nuovo Cimento 23, 141 (1962)]. Unfortunately, he deemed the final
step in his calculations impassable and prematurely suspended his pursuit.
Since then, h... | [
{
"created": "Sun, 14 May 2023 14:21:58 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2023 05:16:58 GMT",
"version": "v2"
}
] | 2023-10-31 | [
[
"Nguyen",
"Hoang Ky",
""
]
] | Circa 1962 Hans A. Buchdahl pioneered a program -- and made significant progress -- seeking vacuo configurations in pure $\mathcal{R}^{2}$ gravity [H. A. Buchdahl, Nuovo Cimento 23, 141 (1962)]. Unfortunately, he deemed the final step in his calculations impassable and prematurely suspended his pursuit. Since then, his... |
2010.15842 | Pau Amaro Seoane | Alejandro Torres-Orjuela, Pau Amaro Seoane, Zeyuan Xuan, Alvin J. K.
Chua, Mar\'ia J. B. Rosell and Xian Chen | Exciting modes due to the aberration of gravitational waves:
Measurability for extreme-mass-ratio inspirals | Accepted PRL | Phys. Rev. Lett. 127, 041102 (2021) | 10.1103/PhysRevLett.127.041102 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from a source moving relative to us can suffer from
special-relativistic effects such as aberration. The required velocities for
these to be significant are on the order of $1000\,\textrm{km s}^{-1}$. This
value corresponds to the velocity dispersion that one finds in clusters of
galaxies. Hence, ... | [
{
"created": "Thu, 29 Oct 2020 18:00:02 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jul 2021 14:39:42 GMT",
"version": "v2"
}
] | 2021-07-28 | [
[
"Torres-Orjuela",
"Alejandro",
""
],
[
"Seoane",
"Pau Amaro",
""
],
[
"Xuan",
"Zeyuan",
""
],
[
"Chua",
"Alvin J. K.",
""
],
[
"Rosell",
"María J. B.",
""
],
[
"Chen",
"Xian",
""
]
] | Gravitational waves from a source moving relative to us can suffer from special-relativistic effects such as aberration. The required velocities for these to be significant are on the order of $1000\,\textrm{km s}^{-1}$. This value corresponds to the velocity dispersion that one finds in clusters of galaxies. Hence, we... |
2012.05642 | Yaser Tavakoli | Yaser Tavakoli, Ahad K. Ardabili, Paulo Vargas Moniz | Exploring the cosmic censorship conjecture with a Gauss-Bonnet sector | 14 pages, 4 figures (Version accepted in PRD) | Phys. Rev. D 103, 084039 (2021) | 10.1103/PhysRevD.103.084039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Dvali-Gabadadze-Porrati (DGP) braneworld model is employed to study the
gravitational collapse of dust, with a Gauss-Bonnet (GB) term present in the
five-dimensional bulk. We find that, within the normal (nonself-accelerating)
DGP branch and due to the curvature effects from the GB component on the brane,
the bla... | [
{
"created": "Thu, 10 Dec 2020 13:02:28 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Apr 2021 22:47:00 GMT",
"version": "v2"
}
] | 2021-04-27 | [
[
"Tavakoli",
"Yaser",
""
],
[
"Ardabili",
"Ahad K.",
""
],
[
"Moniz",
"Paulo Vargas",
""
]
] | The Dvali-Gabadadze-Porrati (DGP) braneworld model is employed to study the gravitational collapse of dust, with a Gauss-Bonnet (GB) term present in the five-dimensional bulk. We find that, within the normal (nonself-accelerating) DGP branch and due to the curvature effects from the GB component on the brane, the black... |
2004.01662 | Tao Zhu | Cheng Liu, Tao Zhu, and Qiang Wu | Thin Accretion Disk around a four-dimensional Einstein-Gauss-Bonnet
Black Hole | 7 pages, 5 figures; V2: references added and some typos are
corrected; v3: 10 pages, 6 figures, version to appear in Chinese Physics C | Chinese Physics C Vol. 45, No. 1 (2021) 015105 | 10.1088/1674-1137/abc16c | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a novel four-dimensional Einstein-Gauss-Bonnet (4EGB) theory of
gravity was proposed by Glavan and Lin [D. Glavan and C. Lin, Phys. Rev. Lett.
124, 081301 (2020)] which includes a regularized Gauss-Bonnet term by using the
re-scaling of the Gauss-Bonnet coupling constant $\alpha \to \alpha/(D-4)$ in
the limi... | [
{
"created": "Fri, 3 Apr 2020 16:29:22 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Apr 2020 13:59:40 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Sep 2020 05:50:29 GMT",
"version": "v3"
}
] | 2021-01-01 | [
[
"Liu",
"Cheng",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wu",
"Qiang",
""
]
] | Recently a novel four-dimensional Einstein-Gauss-Bonnet (4EGB) theory of gravity was proposed by Glavan and Lin [D. Glavan and C. Lin, Phys. Rev. Lett. 124, 081301 (2020)] which includes a regularized Gauss-Bonnet term by using the re-scaling of the Gauss-Bonnet coupling constant $\alpha \to \alpha/(D-4)$ in the limit ... |
2402.18022 | Diogo Bragan\c{c}a | Diogo P. L. Bragan\c{c}a | Gravitational Repulsion in an Expanding Ball of Dust | 8 pages, 2 figures. Accepted for publication in Class. Quantum Grav | null | 10.1088/1361-6382/ad2d70 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, there is a velocity dependent term in the
gravitational acceleration of a test particle for an observer at infinity.
Depending on the direction of motion and the speed, that term can be repulsive.
We show that this is also the case in the Parametrized Post-Newtonian (PPN)
formalism. We compute ... | [
{
"created": "Wed, 28 Feb 2024 03:36:43 GMT",
"version": "v1"
}
] | 2024-02-29 | [
[
"Bragança",
"Diogo P. L.",
""
]
] | In general relativity, there is a velocity dependent term in the gravitational acceleration of a test particle for an observer at infinity. Depending on the direction of motion and the speed, that term can be repulsive. We show that this is also the case in the Parametrized Post-Newtonian (PPN) formalism. We compute th... |
1003.5532 | Hubert F M Goenner | Hubert F M Goenner | Palatini's cousin: A New Variational Principle | 12 pages | Phys.Rev.D81:124019,2010 | 10.1103/PhysRevD.81.124019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A variational principle is suggested within Riemannnian geometry, in which an
auxiliary metric and the Levi Civita connection are varied independently. The
auxiliary metric plays the role of a Lagrange multiplier and introduces
non-minimal coupling of matter to the curvature scalar. The field equations are
2nd order ... | [
{
"created": "Mon, 29 Mar 2010 13:16:52 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Goenner",
"Hubert F M",
""
]
] | A variational principle is suggested within Riemannnian geometry, in which an auxiliary metric and the Levi Civita connection are varied independently. The auxiliary metric plays the role of a Lagrange multiplier and introduces non-minimal coupling of matter to the curvature scalar. The field equations are 2nd order PD... |
2104.15011 | Matthew Mould | Matthew Mould | Unstable binary black-hole spins: post-Newtonian theory and numerical
relativity | 4 pages, 2 figures, contribution to the 2021 Gravitation session of
the 55th Rencontres de Moriond | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin precession occurs in binary black holes whose spins are misaligned with
the orbital angular momentum. Otherwise, the spin configuration is constant and
the subsequent binary dynamics and gravitational-wave emission are much
simpler. We summarize a series of works which has shown that, while three of
the aligned ... | [
{
"created": "Fri, 30 Apr 2021 13:59:19 GMT",
"version": "v1"
}
] | 2021-05-03 | [
[
"Mould",
"Matthew",
""
]
] | Spin precession occurs in binary black holes whose spins are misaligned with the orbital angular momentum. Otherwise, the spin configuration is constant and the subsequent binary dynamics and gravitational-wave emission are much simpler. We summarize a series of works which has shown that, while three of the aligned co... |
1410.6605 | Lorenzo De Vittori | Lorenzo De Vittori, Achamveedu Gopakumar, Anuradha Gupta, Philippe
Jetzer | Memory effect from spinning unbound binaries | 7 pages, 2 figures. To appear in the Proceedings of the 2014 Sant
Cugat Forum on Astrophysics. Astrophysics and Space Science Proceedings, ed.
C.Sopuerta (Berlin: Springer-Verlag) | null | 10.1007/978-3-319-10488-1_22 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a recently developed prescription to obtain ready-to-use
gravitational wave (GW) polarization states for spinning compact binaries on
hyperbolic orbits. We include leading order spin-orbit interactions, invoking
1.5PN-accurate quasi-Keplerian parametrization for the radial part of the
orbital dynamics. We ... | [
{
"created": "Fri, 24 Oct 2014 07:54:03 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"De Vittori",
"Lorenzo",
""
],
[
"Gopakumar",
"Achamveedu",
""
],
[
"Gupta",
"Anuradha",
""
],
[
"Jetzer",
"Philippe",
""
]
] | We present a recently developed prescription to obtain ready-to-use gravitational wave (GW) polarization states for spinning compact binaries on hyperbolic orbits. We include leading order spin-orbit interactions, invoking 1.5PN-accurate quasi-Keplerian parametrization for the radial part of the orbital dynamics. We al... |
2103.15707 | Luciano Combi | Luciano Combi, Federico G. Lopez Armengol, Manuela Campanelli, Brennan
Ireland, Scott C. Noble, Hiroyuki Nakano, Dennis Bowen | Superposed metric for spinning black hole binaries approaching merger | Accepted for publication in Physical Review D | Phys. Rev. D 104, 044041 (2021) | 10.1103/PhysRevD.104.044041 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We construct an approximate metric that represents the spacetime of spinning
binary black holes (BBH) approaching merger. We build the metric as an
analytical superposition of two Kerr metrics in harmonic coordinates, where we
transform each black hole term with time-dependent boosts describing an
inspiral trajectory... | [
{
"created": "Mon, 29 Mar 2021 15:45:12 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Aug 2021 16:26:12 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"Combi",
"Luciano",
""
],
[
"Armengol",
"Federico G. Lopez",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Ireland",
"Brennan",
""
],
[
"Noble",
"Scott C.",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Bowen",
"Dennis",
... | We construct an approximate metric that represents the spacetime of spinning binary black holes (BBH) approaching merger. We build the metric as an analytical superposition of two Kerr metrics in harmonic coordinates, where we transform each black hole term with time-dependent boosts describing an inspiral trajectory. ... |
1303.0939 | Miklos L{\aa}ngvik | Miklos L{\aa}ngvik | En komprimerad introduktion till slingkvantgravitation och spinnskum
modeller | 55 pages, 4 figures, review article, in Swedish | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A short introductory review of loop quantum gravity and spinfoam models in
Swedish. A small knowledge of general relativity in connection variables is
assumed, but an emphasis has been put on giving a self-supporting presentation.
--
Inom denna reviewarikel ser vi \"over slingkvantgravitationens och spinnskum
mod... | [
{
"created": "Tue, 5 Mar 2013 06:19:13 GMT",
"version": "v1"
}
] | 2013-03-06 | [
[
"Långvik",
"Miklos",
""
]
] | A short introductory review of loop quantum gravity and spinfoam models in Swedish. A small knowledge of general relativity in connection variables is assumed, but an emphasis has been put on giving a self-supporting presentation. -- Inom denna reviewarikel ser vi \"over slingkvantgravitationens och spinnskum modellern... |
1901.00676 | Andrea Geralico | Donato Bini, Andrea Geralico | Gravitational wave effects on astrometric observables | 15 pages, revtex macros; published version | Phys. Rev. D 98, 124036 (2018) | 10.1103/PhysRevD.98.124036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observational data from the ESA astrometric mission Gaia determining the
positions of celestial objects within an accuracy of few microarcseconds will
be soon fully available. Other satellite-based space missions are currently
planned to significantly improve such precision in the next years. The data
reduction proce... | [
{
"created": "Thu, 3 Jan 2019 10:47:52 GMT",
"version": "v1"
}
] | 2019-01-04 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | Observational data from the ESA astrometric mission Gaia determining the positions of celestial objects within an accuracy of few microarcseconds will be soon fully available. Other satellite-based space missions are currently planned to significantly improve such precision in the next years. The data reduction process... |
2201.11072 | Gerardo Garc\'ia-Moreno | Carlos Barcel\'o, Jokin Eguia S\'anchez, Gerardo Garc\'ia-Moreno and
Gil Jannes | Chronology Protection Implementation in Analogue Gravity | 37 pages, 8 figures; v2: Minor changes introduced to match the
published version | Eur. Phys. J. C 82, 299 (2022) | 10.1140/epjc/s10052-022-10275-3 | null | gr-qc cond-mat.other hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analogue gravity systems offer many insights into gravitational phenomena,
both at the classical and at the semiclassical level. The existence of an
underlying Minkowskian structure (or Galilean in the non-relativistic limit) in
the laboratory has been argued to directly forbid the simulation of geometries
with Close... | [
{
"created": "Wed, 26 Jan 2022 17:32:32 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2022 08:13:08 GMT",
"version": "v2"
}
] | 2022-04-08 | [
[
"Barceló",
"Carlos",
""
],
[
"Sánchez",
"Jokin Eguia",
""
],
[
"García-Moreno",
"Gerardo",
""
],
[
"Jannes",
"Gil",
""
]
] | Analogue gravity systems offer many insights into gravitational phenomena, both at the classical and at the semiclassical level. The existence of an underlying Minkowskian structure (or Galilean in the non-relativistic limit) in the laboratory has been argued to directly forbid the simulation of geometries with Closed ... |
2006.06421 | Arun Mathew | Arun Mathew, Muhammed Shafeeque and Malay K. Nandy | Stellar structure of quark stars in a modified Starobinsky gravity | null | null | 10.1140/epjc/s10052-020-8130-4 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a form of gravity-matter interaction given by $\omega RT$ in the
framework of $f(R,T)$ gravity and examine the effect of such interaction in
spherically symmetric compact stars. Treating the gravity-matter coupling as a
perturbative term on the background of Starobinsky gravity, we develop a
perturbation t... | [
{
"created": "Wed, 10 Jun 2020 08:02:58 GMT",
"version": "v1"
}
] | 2020-07-14 | [
[
"Mathew",
"Arun",
""
],
[
"Shafeeque",
"Muhammed",
""
],
[
"Nandy",
"Malay K.",
""
]
] | We propose a form of gravity-matter interaction given by $\omega RT$ in the framework of $f(R,T)$ gravity and examine the effect of such interaction in spherically symmetric compact stars. Treating the gravity-matter coupling as a perturbative term on the background of Starobinsky gravity, we develop a perturbation the... |
2303.09116 | Theodoros Nakas | Athanasios Bakopoulos, Theodoros Nakas | Novel exact ultra-compact and ultra-sparse hairy black holes emanating
from regular and phantom scalar fields | 23 pages, 6 figures, an Appendix added, typos corrected, matches
published version | null | 10.1103/PhysRevD.107.124035 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of a simple gravitational theory that contains a scalar
field minimally coupled to gravity, we investigate the emergence of analytic
black-hole solutions with non-trivial scalar hair of secondary type. Although
it is possible for one to obtain asymptotically (A)dS solutions using our
setup, in the co... | [
{
"created": "Thu, 16 Mar 2023 07:17:48 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Jun 2023 19:09:13 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"Bakopoulos",
"Athanasios",
""
],
[
"Nakas",
"Theodoros",
""
]
] | In the framework of a simple gravitational theory that contains a scalar field minimally coupled to gravity, we investigate the emergence of analytic black-hole solutions with non-trivial scalar hair of secondary type. Although it is possible for one to obtain asymptotically (A)dS solutions using our setup, in the cont... |
2003.02373 | Sizheng Ma | Sizheng Ma, Hang Yu, Yanbei Chen | Excitation of f-modes during mergers of spinning binary neutron star | null | Phys. Rev. D 101, 123020 (2020) | 10.1103/PhysRevD.101.123020 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tidal effects have important imprints on gravitational waves (GWs) emitted
during the final stage of the coalescence of binaries that involve neutron
stars (NSs). Dynamical tides can be significant when NS oscillations become
resonant with orbital motion; understanding this process is important for
accurately modelin... | [
{
"created": "Wed, 4 Mar 2020 23:55:04 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2020 03:41:46 GMT",
"version": "v2"
}
] | 2020-06-19 | [
[
"Ma",
"Sizheng",
""
],
[
"Yu",
"Hang",
""
],
[
"Chen",
"Yanbei",
""
]
] | Tidal effects have important imprints on gravitational waves (GWs) emitted during the final stage of the coalescence of binaries that involve neutron stars (NSs). Dynamical tides can be significant when NS oscillations become resonant with orbital motion; understanding this process is important for accurately modeling ... |
1602.07198 | Subenoy Chakraborty | Sanjukta Chakraborty and Subenoy Chakraborty | Gravitational collapse of cylindrical anisotropic fluid: A source of
gravitational waves | 9 pages, No figures | General Relativity and Gravitation, Volume 46, 1784 (2014) | 10.1007/s10714-014-1784-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with dynamics of gravitational collapse with
cylindrical symmetry as developed by Misner and Sharp. The interior collapsing
anisotropic cylindrical perfect fluid is matched to an exterior vacuum
cylindrically symmetric space-time due to Einstein--Rosen using the Darmois
matching conditions. It ... | [
{
"created": "Fri, 19 Feb 2016 04:37:20 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Mar 2016 09:39:46 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Chakraborty",
"Sanjukta",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present work deals with dynamics of gravitational collapse with cylindrical symmetry as developed by Misner and Sharp. The interior collapsing anisotropic cylindrical perfect fluid is matched to an exterior vacuum cylindrically symmetric space-time due to Einstein--Rosen using the Darmois matching conditions. It is... |
2407.20032 | Nigel Bishop | Nigel T. Bishop | The interaction between gravitational waves and a viscous fluid shell on
a Schwarzschild background | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Previous work has shown that the interaction between gravitational waves
(GWs) and a shell of viscous matter leads to damping of the GWs and heating of
the matter, and that these effects may be astrophysically significant. This
result was derived using the theory of linear perturbations about a Minkowki
background, a... | [
{
"created": "Mon, 29 Jul 2024 14:18:44 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Bishop",
"Nigel T.",
""
]
] | Previous work has shown that the interaction between gravitational waves (GWs) and a shell of viscous matter leads to damping of the GWs and heating of the matter, and that these effects may be astrophysically significant. This result was derived using the theory of linear perturbations about a Minkowki background, and... |
1409.7874 | Sunil Maharaj | Sushant G. Ghosh and Sunil D. Maharaj | Cloud of strings for radiating black holes in Lovelock gravity | 9 pages, To appear in Phys. Rev. D | Phys. Rev. D 89, 084027 (2014) | 10.1103/PhysRevD.89.084027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present exact spherically symmetric null dust solutions in the third order
Lovelock gravity with a string cloud background in arbitrary $N$ dimensions,.
This represents radiating black holes and generalizes the well known Vaidya
solution to Lovelock gravity with a string cloud in the background. We also
discuss th... | [
{
"created": "Sun, 28 Sep 2014 07:41:22 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We present exact spherically symmetric null dust solutions in the third order Lovelock gravity with a string cloud background in arbitrary $N$ dimensions,. This represents radiating black holes and generalizes the well known Vaidya solution to Lovelock gravity with a string cloud in the background. We also discuss the ... |
1703.10241 | Federico Le\'on Carrasco | Federico Carrasco and Oscar Reula | A novel scheme for simulating the force-free equations: boundary
conditions and the evolution of solutions towards stationarity | 18 pages, 17 figures | Phys. Rev. D 96, 063006 (2017) | 10.1103/PhysRevD.96.063006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Force-Free Electrodynamics (FFE) describes a particular regime of
magnetically dominated relativistic plasmas, which arises on several
astrophysical scenarios of interest such as pulsars or active galactic nuclei.
In this article, we present a full 3D numerical implementation of the FFE
evolution around a Kerr black ... | [
{
"created": "Wed, 29 Mar 2017 20:40:26 GMT",
"version": "v1"
}
] | 2017-09-20 | [
[
"Carrasco",
"Federico",
""
],
[
"Reula",
"Oscar",
""
]
] | Force-Free Electrodynamics (FFE) describes a particular regime of magnetically dominated relativistic plasmas, which arises on several astrophysical scenarios of interest such as pulsars or active galactic nuclei. In this article, we present a full 3D numerical implementation of the FFE evolution around a Kerr black ho... |
1003.1471 | Pavel Sl\'adek | Pavel Sladek, Daniel J. Finley | Asymptotic properties of the C-Metric | 28 pages, 11 figures | Class.Quant.Grav.27:205020,2010 | 10.1088/0264-9381/27/20/205020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this article is to analyze the asymptotic properties of the
C-metric, using a general method specified in work of Tafel and coworkers, [1],
[2], [3]. By finding an appropriate conformal factor $\Omega$, it allows the
investigation of the asymptotic properties of a given asymptotically flat
spacetime. The n... | [
{
"created": "Sun, 7 Mar 2010 13:57:33 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Sladek",
"Pavel",
""
],
[
"Finley",
"Daniel J.",
""
]
] | The aim of this article is to analyze the asymptotic properties of the C-metric, using a general method specified in work of Tafel and coworkers, [1], [2], [3]. By finding an appropriate conformal factor $\Omega$, it allows the investigation of the asymptotic properties of a given asymptotically flat spacetime. The new... |
1011.4127 | Tiberiu Harko | Z. Kovacs, T. Harko | Can accretion disk properties observationally distinguish black holes
from naked singularities? | 21 pages, 9 figures, accepted for publication in PRD | Phys.Rev.D82:124047,2010 | 10.1103/PhysRevD.82.124047 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Naked singularities are hypothetical astrophysical objects, characterized by
a gravitational singularity without an event horizon. Penrose has proposed a
conjecture, according to which there exists a cosmic censor who forbids the
occurrence of naked singularities. Distinguishing between astrophysical black
holes and ... | [
{
"created": "Thu, 18 Nov 2010 03:01:53 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Dec 2010 04:54:21 GMT",
"version": "v2"
}
] | 2011-01-17 | [
[
"Kovacs",
"Z.",
""
],
[
"Harko",
"T.",
""
]
] | Naked singularities are hypothetical astrophysical objects, characterized by a gravitational singularity without an event horizon. Penrose has proposed a conjecture, according to which there exists a cosmic censor who forbids the occurrence of naked singularities. Distinguishing between astrophysical black holes and na... |
0712.2236 | Vitaly Vanchurin | Vitaly Vanchurin | Cosmic string loops: large and small, but not tiny | 6 pages, 1 figure, power-law approximation is replaced with
exponential | Phys.Rev.D77:063532,2008 | 10.1103/PhysRevD.77.063532 | LMU-ASC 78/07 | gr-qc astro-ph hep-ph hep-th | null | We develop an analytical model to study the production spectrum of loops in
the cosmic string network. In the scaling regime, we find two different scales
corresponding to large (one order below horizon) and small (few orders below
horizon) loops. The very small (tiny) loops at the gravitational back reaction
scale a... | [
{
"created": "Fri, 14 Dec 2007 19:08:31 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Mar 2008 19:01:33 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Vanchurin",
"Vitaly",
""
]
] | We develop an analytical model to study the production spectrum of loops in the cosmic string network. In the scaling regime, we find two different scales corresponding to large (one order below horizon) and small (few orders below horizon) loops. The very small (tiny) loops at the gravitational back reaction scale are... |
1511.00358 | Kazunari Eda | Kazunari Eda, Kenji Ono, Yousuke Itoh | Determination of mass of an isolated neutron star using continuous
gravitational waves with two frequency modes: an effect of a misalignment
angle | 4 pages, 1 figure | null | 10.1088/1742-6596/716/1/012026 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A rapidly spinning neutron star (NS) would emit a continuous gravitational
wave (GW) detectable by the advanced LIGO, advanced Virgo, KAGRA and proposed
third generation detectors such as the Einstein Telescope (ET). Such a GW does
not propagate freely, but is affected by the Coulomb-type gravitational field
of the N... | [
{
"created": "Mon, 2 Nov 2015 02:20:32 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2016 15:09:53 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Eda",
"Kazunari",
""
],
[
"Ono",
"Kenji",
""
],
[
"Itoh",
"Yousuke",
""
]
] | A rapidly spinning neutron star (NS) would emit a continuous gravitational wave (GW) detectable by the advanced LIGO, advanced Virgo, KAGRA and proposed third generation detectors such as the Einstein Telescope (ET). Such a GW does not propagate freely, but is affected by the Coulomb-type gravitational field of the NS ... |
2112.12481 | Juan Calderon Bustillo | Juan Calder\'on Bustillo and Samson H.W. Leong and Koustav Chandra and
Barry McKernan and K. E. S. Ford | GW190521 as a black-hole merger coincident with the ZTF19abanrhr flare | 14 Pages, 11 Figures | null | null | LIGO-P2100467 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an analysis that reconciles the gravitational-wave signal GW190521
observed by the Advanced LIGO and Advanced Virgo detectors with the
electromagnetic flare ZTF19abanrhr observed by the Zwicky Transient Facility.
We analyze GW190521 under a mass-ratio prior uniform in $Q \in [1,4]$ and using
the state-of-t... | [
{
"created": "Thu, 23 Dec 2021 12:13:06 GMT",
"version": "v1"
}
] | 2021-12-24 | [
[
"Bustillo",
"Juan Calderón",
""
],
[
"Leong",
"Samson H. W.",
""
],
[
"Chandra",
"Koustav",
""
],
[
"McKernan",
"Barry",
""
],
[
"Ford",
"K. E. S.",
""
]
] | We present an analysis that reconciles the gravitational-wave signal GW190521 observed by the Advanced LIGO and Advanced Virgo detectors with the electromagnetic flare ZTF19abanrhr observed by the Zwicky Transient Facility. We analyze GW190521 under a mass-ratio prior uniform in $Q \in [1,4]$ and using the state-of-the... |
1003.5490 | Sanjeev Dhurandhar | S. Dhurandhar, H. Mukhopadhyay, H. Tagoshi and N. Kanda | Coherent versus coincidence detection of gravitational wave signals from
compact inspiraling binaries | Based on the presentation at the 1st Galileo Xu Guangqi conference,
Shanghai. | Int.J.Mod.Phys.D20:2051-2056,2011 | 10.1142/S0218271811020160 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare two multi-detector detection strategies, namely, the coincidence
and the coherent, for the detection of spinless inspiraling compact binary
gravitational wave signals. The coincident strategy treats the detectors as if
they are isolated - compares individual detector statistics with their
respective thresh... | [
{
"created": "Mon, 29 Mar 2010 10:44:19 GMT",
"version": "v1"
}
] | 2011-09-30 | [
[
"Dhurandhar",
"S.",
""
],
[
"Mukhopadhyay",
"H.",
""
],
[
"Tagoshi",
"H.",
""
],
[
"Kanda",
"N.",
""
]
] | We compare two multi-detector detection strategies, namely, the coincidence and the coherent, for the detection of spinless inspiraling compact binary gravitational wave signals. The coincident strategy treats the detectors as if they are isolated - compares individual detector statistics with their respective threshol... |
gr-qc/9910042 | Marc Toussaint | Marc Toussaint (University of Cologne) | A numeric solution for metric-affine gravity and Einstein's
gravitational theory with Proca matter | LaTeX2e, 20 pages, 22 figures | Gen.Rel.Grav. 32 (2000) 1689-1709 | 10.1023/A:1001942420350 | Cologne-ThP-He3-oct99 | gr-qc | null | A special case of metric-affine gauge theory of gravity (MAG) is equivalent
to general relativity with Proca matter as source. We study in detail a
corresponding numeric solution of the Reissner-Nordstr"om type. It is static,
spherically symmetric, and of electric type. In particular, this solution has
no horizon, so... | [
{
"created": "Tue, 12 Oct 1999 15:36:15 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Toussaint",
"Marc",
"",
"University of Cologne"
]
] | A special case of metric-affine gauge theory of gravity (MAG) is equivalent to general relativity with Proca matter as source. We study in detail a corresponding numeric solution of the Reissner-Nordstr"om type. It is static, spherically symmetric, and of electric type. In particular, this solution has no horizon, so i... |
1110.2157 | Valentin Bonzom | Valentin Bonzom and Alok Laddha | Lessons from Toy-Models for the Dynamics of Loop Quantum Gravity | null | SIGMA 8 (2012), 009, 50 pages | 10.3842/SIGMA.2012.009 | pi-qg-243 | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | We review some approaches to the Hamiltonian dynamics of (loop) quantum
gravity, the main issues being the regularization of the Hamiltonian and the
continuum limit. First, Thiemann's definition of the quantum Hamiltonian is
presented, and then more recent approaches. They are based on toy models which
provide new in... | [
{
"created": "Mon, 10 Oct 2011 19:44:34 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Mar 2012 06:03:39 GMT",
"version": "v2"
}
] | 2012-03-08 | [
[
"Bonzom",
"Valentin",
""
],
[
"Laddha",
"Alok",
""
]
] | We review some approaches to the Hamiltonian dynamics of (loop) quantum gravity, the main issues being the regularization of the Hamiltonian and the continuum limit. First, Thiemann's definition of the quantum Hamiltonian is presented, and then more recent approaches. They are based on toy models which provide new insi... |
gr-qc/0412075 | Mario Goto | Mario Goto | Charge Tempered Cosmological Model | Revised version extended to includ analytical solution of the
modified Friedmann equation and the red shift formula with gravitational
together the recessional velocity dependence. (23 pages) | null | null | null | gr-qc | null | The main purpose of this work is to obtain the metric of a Charge Tempered
Cosmological Model, a slightly modified Standard Cosmological Model by a small
excess of charge density, distributed uniformly in accordance with the
Cosmological Principle, the global Coulomb interaction incorporated in this
metric. The parti... | [
{
"created": "Wed, 15 Dec 2004 18:45:25 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2005 13:04:30 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Goto",
"Mario",
""
]
] | The main purpose of this work is to obtain the metric of a Charge Tempered Cosmological Model, a slightly modified Standard Cosmological Model by a small excess of charge density, distributed uniformly in accordance with the Cosmological Principle, the global Coulomb interaction incorporated in this metric. The particu... |
1702.08308 | Tuan Do | Tuan Q. Do and Sonnet Hung Q. Nguyen | Anisotropic power-law inflation in a two-scalar-field model with a mixed
kinetic term | 19 pages, no figures. Accepted for publication in International
Journal of Modern Physics D | International Journal of Modern Physics D 26, 1750072 (2017) | 10.1142/S0218271817500729 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine whether an extended scenario of a two-scalar-field model, in which
a mixed kinetic term of canonical and phantom scalar fields is involved, admits
the Bianchi type I metric, which is homogeneous but anisotropic spacetime, as
its power-law solutions. Then we analyze the stability of the anisotropic
power-la... | [
{
"created": "Mon, 27 Feb 2017 14:54:51 GMT",
"version": "v1"
}
] | 2017-02-28 | [
[
"Do",
"Tuan Q.",
""
],
[
"Nguyen",
"Sonnet Hung Q.",
""
]
] | We examine whether an extended scenario of a two-scalar-field model, in which a mixed kinetic term of canonical and phantom scalar fields is involved, admits the Bianchi type I metric, which is homogeneous but anisotropic spacetime, as its power-law solutions. Then we analyze the stability of the anisotropic power-law ... |
1205.6954 | Christian Corda cordac | Christian Corda | Radiation dominated era and the power of general relativity | 7 pages, 1 figure, accepted for publication in Europhysics Letters | EPL, 99, 10001 (2012) | 10.1209/0295-5075/99/10001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An analysis in the framework of the radiation dominated era permits to put
bounds on the weak modification of general relativity which arises from the
Lagrangian R^{1+epsilon}. Such a theory has been recently discussed in various
papers in the literature. The new bounds together with previous ones in the
literature r... | [
{
"created": "Thu, 31 May 2012 10:44:32 GMT",
"version": "v1"
}
] | 2012-07-13 | [
[
"Corda",
"Christian",
""
]
] | An analysis in the framework of the radiation dominated era permits to put bounds on the weak modification of general relativity which arises from the Lagrangian R^{1+epsilon}. Such a theory has been recently discussed in various papers in the literature. The new bounds together with previous ones in the literature rul... |
gr-qc/0407075 | Pawel O. Mazur | Pawel O. Mazur, Emil Mottola (University of South Carolina, Los Alamos
National Laboratory) | Gravitational Vacuum Condensate Stars | 17 pages, LaTeX file | Proc.Nat.Acad.Sci.101:9545-9550,2004 | 10.1073/pnas.0402717101 | null | gr-qc hep-ph hep-th quant-ph | null | A new final state of gravitational collapse is proposed. By extending the
concept of Bose-Einstein condensation to gravitational systems, a cold, dark,
compact object with an interior de Sitter condensate $p_{_V} = -\rho_{_V}$ and
an exterior Schwarzschild geometry of arbitrary total mass $M$ is constructed.
These ar... | [
{
"created": "Tue, 20 Jul 2004 00:31:46 GMT",
"version": "v1"
}
] | 2009-10-19 | [
[
"Mazur",
"Pawel O.",
"",
"University of South Carolina, Los Alamos\n National Laboratory"
],
[
"Mottola",
"Emil",
"",
"University of South Carolina, Los Alamos\n National Laboratory"
]
] | A new final state of gravitational collapse is proposed. By extending the concept of Bose-Einstein condensation to gravitational systems, a cold, dark, compact object with an interior de Sitter condensate $p_{_V} = -\rho_{_V}$ and an exterior Schwarzschild geometry of arbitrary total mass $M$ is constructed. These are ... |
0907.4930 | Richard Woodard | S. P. Miao (University of Utrecht) N. C. Tsamis (University of Crete)
R. P. Woodard (University of Florida) | Transforming to Lorentz Gauge on de Sitter | 45 pages | J.Math.Phys.50:122502,2009 | 10.1063/1.3266179 | UFIFT-QG-09-05 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that certain gauge fixing functionals cannot be added to the
action on backgrounds such as de Sitter in which a linearization instability is
present. We also construct the field dependent gauge transformation which
carries the electromagnetic vector potential from a convenient, non-de Sitter
invariant ... | [
{
"created": "Tue, 28 Jul 2009 15:11:16 GMT",
"version": "v1"
}
] | 2010-01-15 | [
[
"Miao",
"S. P.",
"",
"University of Utrecht"
],
[
"Tsamis",
"N. C.",
"",
"University of Crete"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | We demonstrate that certain gauge fixing functionals cannot be added to the action on backgrounds such as de Sitter in which a linearization instability is present. We also construct the field dependent gauge transformation which carries the electromagnetic vector potential from a convenient, non-de Sitter invariant ga... |
gr-qc/0411099 | Carlos Kozameh | Emanuel Gallo, Mirta Iriondo, and Carlos Kozameh (University of
Cordoba, Argentina) | Cartan's equivalence method and null coframes in General Relativity | 33 pages. To be published in Class. Quantum Grav | Class.Quant.Grav. 22 (2005) 1881-1901 | 10.1088/0264-9381/22/9/025 | null | gr-qc | null | Using Cartan's equivalence method for point transformations we obtain from
first principles the conformal geometry associated with third order ODEs and a
special class of PDEs in two dimensions. We explicitly construct the null
tetrads of a family of Lorentzian metrics, the conformal group in three and
four dimension... | [
{
"created": "Fri, 19 Nov 2004 14:16:52 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2004 21:14:39 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Apr 2005 17:14:25 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Gallo",
"Emanuel",
"",
"University of\n Cordoba, Argentina"
],
[
"Iriondo",
"Mirta",
"",
"University of\n Cordoba, Argentina"
],
[
"Kozameh",
"Carlos",
"",
"University of\n Cordoba, Argentina"
]
] | Using Cartan's equivalence method for point transformations we obtain from first principles the conformal geometry associated with third order ODEs and a special class of PDEs in two dimensions. We explicitly construct the null tetrads of a family of Lorentzian metrics, the conformal group in three and four dimensions ... |
2303.15923 | Michele Maggiore | Marica Branchesi, Michele Maggiore, David Alonso, Charles Badger,
Biswajit Banerjee, Freija Beirnaert, Enis Belgacem, Swetha Bhagwat, Guillaume
Boileau, Ssohrab Borhanian, Daniel David Brown, Man Leong Chan, Giulia Cusin,
Stefan L. Danilishin, Jerome Degallaix, Valerio De Luca, Arnab Dhani, Tim
Dietrich, Ulyana... | Science with the Einstein Telescope: a comparison of different designs | 197 pages, 73 figures. v2: corrections in the part on the sensitivity
to stochastic backgrounds. Accepted in JCAP | null | 10.1088/1475-7516/2023/07/068 | ET-0084A-23 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Telescope (ET), the European project for a third-generation
gravitational-wave detector, has a reference configuration based on a
triangular shape consisting of three nested detectors with 10 km arms, where in
each arm there is a `xylophone' configuration made of an interferometer tuned
toward high frequ... | [
{
"created": "Tue, 28 Mar 2023 12:29:33 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Jun 2023 10:49:26 GMT",
"version": "v2"
}
] | 2023-08-09 | [
[
"Branchesi",
"Marica",
""
],
[
"Maggiore",
"Michele",
""
],
[
"Alonso",
"David",
""
],
[
"Badger",
"Charles",
""
],
[
"Banerjee",
"Biswajit",
""
],
[
"Beirnaert",
"Freija",
""
],
[
"Belgacem",
"Enis",
""
... | The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where in each arm there is a `xylophone' configuration made of an interferometer tuned toward high frequen... |
0708.0708 | Chul-Moon Yoo | Chul-Moon Yoo, Hideki Ishihara, Masashi Kimura, Ken Matsuno and Shinya
Tomizawa | Horizons of Coalescing Black Holes on Eguchi-Hanson Space | 20 pages, 11 figures CQG accepted version | Class.Quant.Grav.25:095017,2008 | 10.1088/0264-9381/25/9/095017 | OCU-PHYS-272, AP-GR-46,YITP-08-09 | gr-qc hep-th | null | Using the numerical method, we study dynamics of coalescing black holes on
the Eguchi-Hanson base space. Effects of a difference in spacetime topology on
the black hole dynamics is discussed. We analyze appearance and disappearance
process of marginal surfaces. In our calculation, the area of a coverall black
hole ho... | [
{
"created": "Mon, 6 Aug 2007 06:37:33 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Apr 2008 07:34:18 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Yoo",
"Chul-Moon",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Matsuno",
"Ken",
""
],
[
"Tomizawa",
"Shinya",
""
]
] | Using the numerical method, we study dynamics of coalescing black holes on the Eguchi-Hanson base space. Effects of a difference in spacetime topology on the black hole dynamics is discussed. We analyze appearance and disappearance process of marginal surfaces. In our calculation, the area of a coverall black hole hori... |
1602.02456 | Ikjyot Singh Kohli | Ikjyot Singh Kohli | On Past Singularities in $k=0$ FLRW Cosmologies | Updated some of the contents and format | null | null | null | gr-qc astro-ph.CO math-ph math.DS math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fundamental singularity theorem of FLRW cosmologies assumes that the
matter content in the cosmological model obeys the strong energy condition
along with a nonpositive cosmological constant which gives rise to an
irrotational geodesic singularity. In this paper, we show that the important
case of a spatially fla... | [
{
"created": "Mon, 8 Feb 2016 03:29:06 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2016 15:05:36 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Sep 2016 15:17:55 GMT",
"version": "v3"
}
] | 2016-09-12 | [
[
"Kohli",
"Ikjyot Singh",
""
]
] | The fundamental singularity theorem of FLRW cosmologies assumes that the matter content in the cosmological model obeys the strong energy condition along with a nonpositive cosmological constant which gives rise to an irrotational geodesic singularity. In this paper, we show that the important case of a spatially flat ... |
1709.05319 | Sebasti\'an Bahamonde | Sebastian Bahamonde | Generalised nonminimally gravity-matter coupled theory | Matches published version in EPJC | Eur. Phys. J. C (2018) no 78, 326 | 10.1140/epjc/s10052-018-5793-1 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a new generalised gravity-matter coupled theory of gravity is
presented. This theory is constructed by assuming an action with an arbitrary
function $f(T,B,L_m)$ which depends on the scalar torsion $T$, the boundary
term $B=\nabla_{\mu}T^{\mu}$ and the matter Lagrangian $L_m$. Since the
function depend... | [
{
"created": "Fri, 15 Sep 2017 17:14:29 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2018 18:16:41 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Apr 2018 12:12:46 GMT",
"version": "v3"
}
] | 2018-04-24 | [
[
"Bahamonde",
"Sebastian",
""
]
] | In this paper, a new generalised gravity-matter coupled theory of gravity is presented. This theory is constructed by assuming an action with an arbitrary function $f(T,B,L_m)$ which depends on the scalar torsion $T$, the boundary term $B=\nabla_{\mu}T^{\mu}$ and the matter Lagrangian $L_m$. Since the function depends ... |
gr-qc/9804063 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | On the area operators of the Husain-Kuchar-Rovelli model and
Canonical/Loop Quantum Gravity | LaTex, 8 pages | Mod.Phys.Lett. A13 (1998) 1155-1161 | 10.1142/S0217732398001224 | NEIP-98-003 | gr-qc | null | I investigate the relation between an operative definition of the area of a
surface specified by matter fields and the area operators recently introduced
in the canonical/loop approach to Quantum Gravity and in Rovelli's variant of
the Husain-Kuchar Quantum-Gravity toy model. The results suggest that the
discreteness... | [
{
"created": "Fri, 24 Apr 1998 09:41:25 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | I investigate the relation between an operative definition of the area of a surface specified by matter fields and the area operators recently introduced in the canonical/loop approach to Quantum Gravity and in Rovelli's variant of the Husain-Kuchar Quantum-Gravity toy model. The results suggest that the discreteness o... |
2206.10336 | Gaurav Gadbail | Gaurav N. Gadbail, Simran Arora, P.K. Sahoo | Generalized Chaplygin gas and accelerating universe in $f(Q,T)$ gravity | Physics of the Dark Universe published version | Physics of the Dark Universe, 37 (2022) 101074 | 10.1016/j.dark.2022.101074 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The generalized Chaplygin gas (GCG), which has an unusual perfect fluid
equation of state, is another promising candidate for dark energy. We
investigate the GCG scenario coupled with a baryonic matter in a newly
suggested $f(Q,T)$ gravity, an arbitrary function of non-metricity $Q$ and the
trace of energy-momentum t... | [
{
"created": "Fri, 17 Jun 2022 06:58:51 GMT",
"version": "v1"
}
] | 2022-06-24 | [
[
"Gadbail",
"Gaurav N.",
""
],
[
"Arora",
"Simran",
""
],
[
"Sahoo",
"P. K.",
""
]
] | The generalized Chaplygin gas (GCG), which has an unusual perfect fluid equation of state, is another promising candidate for dark energy. We investigate the GCG scenario coupled with a baryonic matter in a newly suggested $f(Q,T)$ gravity, an arbitrary function of non-metricity $Q$ and the trace of energy-momentum ten... |
1307.1787 | Yurii Ignatyev | Yu.G. Ignat'ev | The cosmological evolution of the cosmological plasma with interpartial
scalar interaction. I. The canonic formulation of classical scalar
interaction | 8 pages | Russian Physics Journal, Volume 55, Number 2 (2012), 166-172 | 10.1007/s11182-012-9790-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the basis of Hamilton a formalism the dynamic equations of movement scalar
charged particles in a classical scalar field are formulated. Unlike earlier
published works of the author the model with zero own weight of particles is
considered. Linear integrals of movement are found and ambiguity of
communication betw... | [
{
"created": "Sat, 6 Jul 2013 14:32:35 GMT",
"version": "v1"
}
] | 2013-07-09 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | On the basis of Hamilton a formalism the dynamic equations of movement scalar charged particles in a classical scalar field are formulated. Unlike earlier published works of the author the model with zero own weight of particles is considered. Linear integrals of movement are found and ambiguity of communication betwee... |
1707.07098 | Masooma Ali | Masooma Ali and Viqar Husain | Mixmaster dynamics in the dust time gauge | 27 pages, 4 figures | Phys. Rev. D 96, 044032 (2017) | 10.1103/PhysRevD.96.044032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Hamiltonian dynamics of the dust-Bianchi IX universe in dust
time gauge. This model has three physical metric degrees of freedom, with
evolution determined by a time-independent physical Hamiltonian. This approach
gives a new physical picture where dust-Bianchi IX dynamics is described by
oscillations be... | [
{
"created": "Sat, 22 Jul 2017 03:33:45 GMT",
"version": "v1"
}
] | 2017-08-30 | [
[
"Ali",
"Masooma",
""
],
[
"Husain",
"Viqar",
""
]
] | We study the Hamiltonian dynamics of the dust-Bianchi IX universe in dust time gauge. This model has three physical metric degrees of freedom, with evolution determined by a time-independent physical Hamiltonian. This approach gives a new physical picture where dust-Bianchi IX dynamics is described by oscillations betw... |
gr-qc/0501016 | Gaurav Khanna | Daniel Cartin, Gaurav Khanna | Absence of pre-classical solutions in Bianchi I loop quantum cosmology | 4 pages, no figures, version to appear in PRL | Phys.Rev.Lett. 94 (2005) 111302 | 10.1103/PhysRevLett.94.111302 | null | gr-qc hep-th | null | Loop quantum cosmology, the symmetry reduction of quantum geometry for the
study of various cosmological situations, leads to a difference equation for
its quantum evolution equation. To ensure that solutions of this equation act
in the expected classical manner far from singularities, additional
restrictions are imp... | [
{
"created": "Thu, 6 Jan 2005 15:14:38 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Feb 2005 00:48:17 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Cartin",
"Daniel",
""
],
[
"Khanna",
"Gaurav",
""
]
] | Loop quantum cosmology, the symmetry reduction of quantum geometry for the study of various cosmological situations, leads to a difference equation for its quantum evolution equation. To ensure that solutions of this equation act in the expected classical manner far from singularities, additional restrictions are impos... |
1808.07352 | Sajad Aghapour | Sajad Aghapour, Ghadir Jafari, Mehdi Golshani | On variational principle and canonical structure of gravitational theory
in double-foliation formalism | 23 pages, Mathematica file included | null | 10.1088/1361-6382/aaef9e | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze the variation of the gravitational action on a
bounded region of spacetime whose boundary contains segments with various
characters, including null. We develop a systematic approach to decompose the
derivative of metric variations into orthogonal and tangential components with
respect to the... | [
{
"created": "Wed, 22 Aug 2018 13:47:45 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Sep 2018 12:25:36 GMT",
"version": "v2"
}
] | 2018-12-26 | [
[
"Aghapour",
"Sajad",
""
],
[
"Jafari",
"Ghadir",
""
],
[
"Golshani",
"Mehdi",
""
]
] | In this paper, we analyze the variation of the gravitational action on a bounded region of spacetime whose boundary contains segments with various characters, including null. We develop a systematic approach to decompose the derivative of metric variations into orthogonal and tangential components with respect to the b... |
gr-qc/9309016 | Wai Suen | Peter Anninos, David Hobill, Edward Seidel, Larry Smarr and Wai-Mo
Suen | The Collision of Two Black Holes | 14 pages, 93-6 | Phys.Rev.Lett. 71 (1993) 2851-2854 | 10.1103/PhysRevLett.71.2851 | null | gr-qc | null | We study the head-on collision of two equal mass, nonrotating black holes. We
consider a range of cases from holes surrounded by a common horizon to holes
initially separated by about $20M$, where $M$ is the mass of each hole. We
determine the waveforms and energies radiated for both the $\ell = 2$ and
$\ell=4$ waves... | [
{
"created": "Tue, 14 Sep 1993 23:45:41 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Anninos",
"Peter",
""
],
[
"Hobill",
"David",
""
],
[
"Seidel",
"Edward",
""
],
[
"Smarr",
"Larry",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | We study the head-on collision of two equal mass, nonrotating black holes. We consider a range of cases from holes surrounded by a common horizon to holes initially separated by about $20M$, where $M$ is the mass of each hole. We determine the waveforms and energies radiated for both the $\ell = 2$ and $\ell=4$ waves r... |
2302.13599 | Alexey Golovnev | Alexey Golovnev | The geometrical meaning of the Weitzenb\"ock connection | 8 pages; minor additions | International Journal of Geometric Methods in Modern Physics 20
(2023) 2350219 | 10.1142/S0219887823502195 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the current literature, there are many discussions about the local Lorentz
invariance of modified teleparallel gravity. This symmetry is obviously
violated in the classical "pure tetrad" formulation of the theory, while it
gets restored in the "fully covariant" approach. My claim is that, despite many
heated discu... | [
{
"created": "Mon, 27 Feb 2023 09:08:12 GMT",
"version": "v1"
},
{
"created": "Sun, 21 May 2023 12:40:36 GMT",
"version": "v2"
}
] | 2024-02-26 | [
[
"Golovnev",
"Alexey",
""
]
] | In the current literature, there are many discussions about the local Lorentz invariance of modified teleparallel gravity. This symmetry is obviously violated in the classical "pure tetrad" formulation of the theory, while it gets restored in the "fully covariant" approach. My claim is that, despite many heated discuss... |
gr-qc/9904074 | Marcelo J. Reboucas | H.L. Carrion, M.J. Reboucas, A.F.F. Teixeira | G\"odel-type Spacetimes in Induced Matter Gravity Theory | 19 pages, Latex, no figures. To Appear in J.Math.Phys.(1999) | J.Math.Phys. 40 (1999) 4011-4027 | 10.1063/1.532939 | CBPF-NF-016/96 | gr-qc astro-ph | null | A five-dimensional (5D) generalized G\"odel-type manifolds are examined in
the light of the equivalence problem techniques, as formulated by Cartan. The
necessary and sufficient conditions for local homogeneity of these 5D manifolds
are derived. The local equivalence of these homogeneous Riemannian manifolds is
studi... | [
{
"created": "Thu, 29 Apr 1999 01:37:55 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Carrion",
"H. L.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Teixeira",
"A. F. F.",
""
]
] | A five-dimensional (5D) generalized G\"odel-type manifolds are examined in the light of the equivalence problem techniques, as formulated by Cartan. The necessary and sufficient conditions for local homogeneity of these 5D manifolds are derived. The local equivalence of these homogeneous Riemannian manifolds is studied... |
1710.00682 | Waleed El Hanafy | A. Awad, W. El Hanafy, G.G.L. Nashed, S.D. Odintsov, V.K. Oikonomou | Constant-roll Inflation in $f(T)$ Teleparallel Gravity | 29 pages, published in JCAP | JCAP 1807 (2018) no. 07, 026 | 10.1088/1475-7516/2018/07/026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate in detail the implications of the constant-roll condition on
the inflationary era of a scalar field coupled to a teleparallel $f(T)$
gravity. The resulting cosmological equations constitute a reconstruction
technique which enables us to find either the $f(T)$ gravity which corresponds
to a given cosmol... | [
{
"created": "Thu, 28 Sep 2017 09:16:24 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jul 2018 17:18:38 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Jul 2018 18:37:08 GMT",
"version": "v3"
}
] | 2018-07-17 | [
[
"Awad",
"A.",
""
],
[
"Hanafy",
"W. El",
""
],
[
"Nashed",
"G. G. L.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | We investigate in detail the implications of the constant-roll condition on the inflationary era of a scalar field coupled to a teleparallel $f(T)$ gravity. The resulting cosmological equations constitute a reconstruction technique which enables us to find either the $f(T)$ gravity which corresponds to a given cosmolog... |
1504.01443 | Takahisa Igata | Takahisa Igata, Shinya Tomizawa | Gravitational solitons in Levi-Civita spacetime | 14 pages | null | null | RUP-15-8 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying the Pomeransky inverse scattering method to the four-dimensional
vacuum Einstein equation and using the Levi-Civita solution for a seed, we
construct a cylindrically symmetric single-soliton solution. Although the
Levi-Civita spacetime generally includes singularities on its axis of symmetry,
it is shown tha... | [
{
"created": "Tue, 7 Apr 2015 00:36:14 GMT",
"version": "v1"
}
] | 2015-04-08 | [
[
"Igata",
"Takahisa",
""
],
[
"Tomizawa",
"Shinya",
""
]
] | Applying the Pomeransky inverse scattering method to the four-dimensional vacuum Einstein equation and using the Levi-Civita solution for a seed, we construct a cylindrically symmetric single-soliton solution. Although the Levi-Civita spacetime generally includes singularities on its axis of symmetry, it is shown that ... |
gr-qc/9709043 | G. Kunstatter | G. Kunstatter, R. Petryk and S. Shelemy (U. of Winnipeg) | Hamiltonian Thermodynamics of Black Holes in Generic 2-D Dilaton Gravity | 25 pages Revtex including 7 (eps) figures | Phys.Rev.D57:3537-3547,1998 | 10.1103/PhysRevD.57.3537 | null | gr-qc hep-th | null | We consider the Hamiltonian mechanics and thermodynamics of an eternal black
hole in a box of fixed radius and temperature in generic 2-D dilaton gravity.
Imposing boundary conditions analoguous to those used by Louko and Whiting for
spherically symmetric gravity, we find that the reduced Hamiltonian generically
take... | [
{
"created": "Tue, 16 Sep 1997 21:01:17 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Kunstatter",
"G.",
"",
"U. of Winnipeg"
],
[
"Petryk",
"R.",
"",
"U. of Winnipeg"
],
[
"Shelemy",
"S.",
"",
"U. of Winnipeg"
]
] | We consider the Hamiltonian mechanics and thermodynamics of an eternal black hole in a box of fixed radius and temperature in generic 2-D dilaton gravity. Imposing boundary conditions analoguous to those used by Louko and Whiting for spherically symmetric gravity, we find that the reduced Hamiltonian generically takes ... |
1507.02877 | Milovan Vasilic | Milovan Vasili\'c | Pseudo-Riemannian Universe from Euclidean bulk | 21 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I develop the idea that our world is a brane-like object embedded in
Euclidean bulk. In its ground state, the brane constituent matter is assumed to
be homogeneous and isotropic, and of negligible influence on the bulk geometry.
The analysis of this paper is model independent, in the sense that action
functional of b... | [
{
"created": "Fri, 10 Jul 2015 12:52:20 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Sep 2015 13:29:44 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Oct 2015 12:52:26 GMT",
"version": "v3"
},
{
"created": "Sat, 22 Apr 2017 20:46:06 GMT",
"version": "v4"
}
] | 2017-04-25 | [
[
"Vasilić",
"Milovan",
""
]
] | I develop the idea that our world is a brane-like object embedded in Euclidean bulk. In its ground state, the brane constituent matter is assumed to be homogeneous and isotropic, and of negligible influence on the bulk geometry. The analysis of this paper is model independent, in the sense that action functional of bul... |
2404.02646 | Qing-Hua Zhu | Qing-Hua Zhu | Ultralight scalar dark matter versus non-adiabatic perfect fluid dark
matter in pulsar timing | 20 pages, 10 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent evidence of direct detection of stochastic gravitational waves
reported by pulsar timing array collaborations might open a new window for
studying cosmology and astrophysical phenomena. In addition to signals from
gravitational waves, there is motivation to explore residual signals from
oscillating dark matter... | [
{
"created": "Wed, 3 Apr 2024 11:16:26 GMT",
"version": "v1"
}
] | 2024-04-04 | [
[
"Zhu",
"Qing-Hua",
""
]
] | Recent evidence of direct detection of stochastic gravitational waves reported by pulsar timing array collaborations might open a new window for studying cosmology and astrophysical phenomena. In addition to signals from gravitational waves, there is motivation to explore residual signals from oscillating dark matter, ... |
1011.1473 | Vladan Pankovic | Vladan Pankovic, Darko Kapor | A simplified quantum theoretical derivation of the Unruh and Hawking
temperature | 5 pages, no figures | null | null | PH-D/18-2015 | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we suggest a sufficiently simple for understanding "without
knowing the details of the quantum gravity" and quite correct deduction of the
Unruh temperature (but not whole Unruh radiation process!). Firstly, we shall
directly apply usual consequences of the Unruh radiation and temperature at
surface grav... | [
{
"created": "Thu, 4 Nov 2010 15:54:32 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Dec 2012 09:41:13 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Apr 2013 12:01:05 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Mar 2015 13:49:56 GMT",
"version": "v4"
}
] | 2015-03-06 | [
[
"Pankovic",
"Vladan",
""
],
[
"Kapor",
"Darko",
""
]
] | In this work we suggest a sufficiently simple for understanding "without knowing the details of the quantum gravity" and quite correct deduction of the Unruh temperature (but not whole Unruh radiation process!). Firstly, we shall directly apply usual consequences of the Unruh radiation and temperature at surface gravit... |
gr-qc/0012025 | Jacob D. Bekenstein | Jacob D. Bekenstein and Asaf Oron | Extended Kelvin theorem in relativistic magnetohydrodynamics | Invited talk at IARD 2000, the Second International Conference on
Relativistic Dynamics, Bar-Ilan University, Israel, 26-28 June, 2000. To
appear in the proceedings in a special issue of Foundations of Physics | Found.Phys. 31 (2001) 895-907 | 10.1023/A:1017507917267 | null | gr-qc astro-ph physics.flu-dyn | null | We prove the existence of a generalization of Kelvin's circulation theorem in
general relativity which is applicable to perfect isentropic
magnetohydrodynamic flow. The argument is based on a new version of the
Lagrangian for perfect magnetohydrodynamics. We illustrate the new conserved
circulation with the example o... | [
{
"created": "Wed, 6 Dec 2000 13:48:27 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Bekenstein",
"Jacob D.",
""
],
[
"Oron",
"Asaf",
""
]
] | We prove the existence of a generalization of Kelvin's circulation theorem in general relativity which is applicable to perfect isentropic magnetohydrodynamic flow. The argument is based on a new version of the Lagrangian for perfect magnetohydrodynamics. We illustrate the new conserved circulation with the example of ... |
2407.04304 | Spencer Collaviti | Spencer Collaviti, Ling Sun, Marios Galanis, Masha Baryakhtar | Observational prospects of self-interacting scalar superradiance with
next-generation gravitational-wave detectors | null | null | null | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current- and next-generation gravitational-wave observatories may reveal new,
ultralight bosons. Through the superradiance process, these theoretical
particle candidates can form clouds around astrophysical black holes and result
in detectable gravitational-wave radiation. In the absence of detections,
constraints$-$... | [
{
"created": "Fri, 5 Jul 2024 07:16:15 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Collaviti",
"Spencer",
""
],
[
"Sun",
"Ling",
""
],
[
"Galanis",
"Marios",
""
],
[
"Baryakhtar",
"Masha",
""
]
] | Current- and next-generation gravitational-wave observatories may reveal new, ultralight bosons. Through the superradiance process, these theoretical particle candidates can form clouds around astrophysical black holes and result in detectable gravitational-wave radiation. In the absence of detections, constraints$-$co... |
gr-qc/9707053 | Thomas Kloesch | T. Kloesch and T. Strobl | A Global View of Kinks in 1+1 Gravity | 20 pages, 12 figures, uses amssymb | Phys.Rev. D57 (1998) 1034-1044 | 10.1103/PhysRevD.57.1034 | TUW-97-13, PITHA-96/24 | gr-qc hep-th | null | Following Finkelstein and Misner, kinks are non-trivial field configurations
of a field theory, and different kink-numbers correspond to different
disconnected components of the space of allowed field configurations for a
given topology of the base manifold. In a theory of gravity, non-vanishing
kink-numbers are asso... | [
{
"created": "Fri, 25 Jul 1997 11:27:36 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Kloesch",
"T.",
""
],
[
"Strobl",
"T.",
""
]
] | Following Finkelstein and Misner, kinks are non-trivial field configurations of a field theory, and different kink-numbers correspond to different disconnected components of the space of allowed field configurations for a given topology of the base manifold. In a theory of gravity, non-vanishing kink-numbers are associ... |
2308.06613 | Ke Yang | Ke Yang, Yue-Zhe Chen, Zheng-Qiao Duan, Ju-Ying Zhao | Static and spherically symmetric black holes in gravity with a
background Kalb-Ramond field | 11 pages and 1 figure, Published version | Phys. Rev. D 108, 124004 (2023) | 10.1103/PhysRevD.108.124004 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The Lorentz symmetry of gravity is spontaneously broken when the nonminimally
coupled Kalb-Ramond field acquires a nonzero vacuum expectation value. In this
work, we present exact solutions for static and spherically symmetric black
holes in the framework of this Lorentz-violating gravity theory. In order to
explore ... | [
{
"created": "Sat, 12 Aug 2023 17:08:28 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2023 02:54:06 GMT",
"version": "v2"
}
] | 2023-12-07 | [
[
"Yang",
"Ke",
""
],
[
"Chen",
"Yue-Zhe",
""
],
[
"Duan",
"Zheng-Qiao",
""
],
[
"Zhao",
"Ju-Ying",
""
]
] | The Lorentz symmetry of gravity is spontaneously broken when the nonminimally coupled Kalb-Ramond field acquires a nonzero vacuum expectation value. In this work, we present exact solutions for static and spherically symmetric black holes in the framework of this Lorentz-violating gravity theory. In order to explore th... |
1705.02133 | Safia Ahmad | Safia Ahmad, R. Myrzakulov, M. Sami | Relic gravitational waves from Quintessential Inflation | 11 pages, 2 figures, major changes, results strengthened in model
independent form, to appear in PRD | Phys. Rev. D 96, 063515 (2017) | 10.1103/PhysRevD.96.063515 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study relic gravitational waves in the paradigm of quintessential
inflation. In this framework, irrespective of the underlying model, inflation
is followed by the kinetic regime. Thereafter, the field energy density remains
sub-dominant before the onset of acceleration. We carry out model independent
analysis to o... | [
{
"created": "Fri, 5 May 2017 08:51:26 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Aug 2017 08:27:54 GMT",
"version": "v2"
}
] | 2017-09-27 | [
[
"Ahmad",
"Safia",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Sami",
"M.",
""
]
] | We study relic gravitational waves in the paradigm of quintessential inflation. In this framework, irrespective of the underlying model, inflation is followed by the kinetic regime. Thereafter, the field energy density remains sub-dominant before the onset of acceleration. We carry out model independent analysis to obt... |
1012.4707 | Carlo Rovelli | Carlo Rovelli | Loop quantum gravity: the first twenty five years | 24 pages, 3 figures | Classical and Quantum Gravity, 28 (2011) 153002 | 10.1088/0264-9381/28/15/153002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a review paper invited by the journal "Classical ad Quantum Gravity"
for a "Cluster Issue" on approaches to quantum gravity. I give a synthetic
presentation of loop gravity. I spell-out the aims of the theory and compare
the results obtained with the initial hopes that motivated the early interest
in this res... | [
{
"created": "Tue, 21 Dec 2010 15:53:38 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Dec 2010 11:47:30 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Dec 2010 10:57:47 GMT",
"version": "v3"
},
{
"created": "Tue, 25 Jan 2011 08:56:34 GMT",
"version": "v4"
},
{
"c... | 2015-05-20 | [
[
"Rovelli",
"Carlo",
""
]
] | This is a review paper invited by the journal "Classical ad Quantum Gravity" for a "Cluster Issue" on approaches to quantum gravity. I give a synthetic presentation of loop gravity. I spell-out the aims of the theory and compare the results obtained with the initial hopes that motivated the early interest in this resea... |
2203.14319 | Charis Anastopoulos | Eirini Sourtzinou and Charis Anastopoulos | Quantum statistical mechanics near a black hole horizon | 31 pages, 4 figures; restructured with minor revisions; to appear in
PRD | Phys. Rev. D 107, 085006 (2023) | 10.1103/PhysRevD.107.085006 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We undertake a first-principles analysis of the thermodynamics of a small
body near a black hole horizon. In particular, we study the paradigmatic system
of a quantum ideal gas in a small box hovering over the Schwarzschild horizon.
We describe the gas in terms of free quantum fields, bosonic and fermionic,
massive a... | [
{
"created": "Sun, 27 Mar 2022 14:40:00 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2022 16:53:14 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Mar 2023 12:37:11 GMT",
"version": "v3"
}
] | 2024-01-17 | [
[
"Sourtzinou",
"Eirini",
""
],
[
"Anastopoulos",
"Charis",
""
]
] | We undertake a first-principles analysis of the thermodynamics of a small body near a black hole horizon. In particular, we study the paradigmatic system of a quantum ideal gas in a small box hovering over the Schwarzschild horizon. We describe the gas in terms of free quantum fields, bosonic and fermionic, massive and... |
0912.5490 | Natalia Kiriushcheva | N. Kiriushcheva and S.V. Kuzmin | Darboux coordinates for the Hamiltonian of first order Einstein-Cartan
gravity | 44 pages, references are added, organization of material is slightly
modified (additional section is introduced), more details of calculation of
the Dirac bracket between translational and rotational constraints are
provided | Int.J.Theor.Phys.49:2859-2890,2010 | 10.1007/s10773-010-0479-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on preliminary analysis of the Hamiltonian formulation of the first
order Einstein-Cartan action (arXiv:0902.0856 [gr-qc] and arXiv:0907.1553
[gr-qc]) we derive the Darboux coordinates, which are a unique and uniform
change of variables preserving equivalence with the original action in all
spacetime dimensions... | [
{
"created": "Wed, 30 Dec 2009 17:25:30 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2010 15:50:37 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Kiriushcheva",
"N.",
""
],
[
"Kuzmin",
"S. V.",
""
]
] | Based on preliminary analysis of the Hamiltonian formulation of the first order Einstein-Cartan action (arXiv:0902.0856 [gr-qc] and arXiv:0907.1553 [gr-qc]) we derive the Darboux coordinates, which are a unique and uniform change of variables preserving equivalence with the original action in all spacetime dimensions h... |
1901.03413 | Lior M. Burko | Lior M. Burko and Gaurav Khanna | The Marolf-Ori singularity inside fast spinning black holes | null | Phys. Rev. D 99, 081501 (2019) | 10.1103/PhysRevD.99.081501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effective shock wave singularity at the outgoing leg of the inner horizon
of a linearly perturbed fast spinning black hole is studied numerically for
either scalar field, or vacuum, gravitational perturbations. We demonstrate the
occurrence of the Marolf-Ori singularity, including changes of order unity in
the sc... | [
{
"created": "Thu, 10 Jan 2019 22:04:59 GMT",
"version": "v1"
}
] | 2019-05-08 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
]
] | The effective shock wave singularity at the outgoing leg of the inner horizon of a linearly perturbed fast spinning black hole is studied numerically for either scalar field, or vacuum, gravitational perturbations. We demonstrate the occurrence of the Marolf-Ori singularity, including changes of order unity in the scal... |
2001.02543 | Karthik Rajeev | Karthik Rajeev | Complex time route to quantum backreaction | 23 pages, 2 figures, published version | null | 10.1140/epjc/s10052-019-7480-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the backreaction of a quantum system $q$ on an effectively
classical degree of freedom $C$ that is interacting with it. The backreaction
equation based on the standard path integral formalism gives the so-called
`in-out' backreaction equation, which has several serious pathologies. One can
use a different... | [
{
"created": "Wed, 8 Jan 2020 14:20:10 GMT",
"version": "v1"
}
] | 2020-01-09 | [
[
"Rajeev",
"Karthik",
""
]
] | We consider the backreaction of a quantum system $q$ on an effectively classical degree of freedom $C$ that is interacting with it. The backreaction equation based on the standard path integral formalism gives the so-called `in-out' backreaction equation, which has several serious pathologies. One can use a different b... |
gr-qc/0409072 | Friedrich W. Hehl | Claus L\"ammerzahl (1), Friedrich W. Hehl (2,3) ((1) Bremen, (2)
Cologne, (3) Missouri-Columbia) | Riemannian light cone from vanishing birefringence in premetric vacuum
electrodynamics | 12 pages latex | Phys.Rev. D70 (2004) 105022 | 10.1103/PhysRevD.70.105022 | null | gr-qc | null | We consider premetric electrodynamics with a local and linear constitutive
law for the vacuum. Within this framework, we find quartic Fresnel wave
surfaces for the propagation of light. If we require vanishing birefringence in
vacuum, then a Riemannian light cone is implied. No proper Finslerian structure
can occur. ... | [
{
"created": "Sun, 19 Sep 2004 21:17:27 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2004 23:24:20 GMT",
"version": "v2"
}
] | 2016-08-16 | [
[
"Lämmerzahl",
"Claus",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | We consider premetric electrodynamics with a local and linear constitutive law for the vacuum. Within this framework, we find quartic Fresnel wave surfaces for the propagation of light. If we require vanishing birefringence in vacuum, then a Riemannian light cone is implied. No proper Finslerian structure can occur. Th... |
1701.05750 | Timothy Clifton | Timothy Clifton, Bernard Carr, Alan Coley | Persistent Black Holes in Bouncing Cosmologies | 37 pages, 16 figures | Class. Quantum Grav. 34 (2017) 135005 | 10.1088/1361-6382/aa6dbb | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we explore the idea that black holes can persist in a universe
that collapses to a big crunch and then bounces into a new phase of expansion.
We use a scalar field to model the matter content of such a universe {near the
time} of the bounce, and look for solutions that represent a network of black
holes... | [
{
"created": "Fri, 20 Jan 2017 10:38:52 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jun 2017 09:34:30 GMT",
"version": "v2"
}
] | 2017-06-28 | [
[
"Clifton",
"Timothy",
""
],
[
"Carr",
"Bernard",
""
],
[
"Coley",
"Alan",
""
]
] | In this paper we explore the idea that black holes can persist in a universe that collapses to a big crunch and then bounces into a new phase of expansion. We use a scalar field to model the matter content of such a universe {near the time} of the bounce, and look for solutions that represent a network of black holes w... |
1908.11170 | null | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C.
Adams, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D.
Aguiar, L. Aiello, A. Ain, P. Ajith, T. Alford, G. Allen, A. Allocca, M. A.
Aloy, P. A. Altin, A... | A guide to LIGO-Virgo detector noise and extraction of transient
gravitational-wave signals | null | B P Abbott et al 2020 Class. Quantum Grav. 37 055002 | 10.1088/1361-6382/ab685e | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO Scientific Collaboration and the Virgo Collaboration have cataloged
eleven confidently detected gravitational-wave events during the first two
observing runs of the advanced detector era. All eleven events were consistent
with being from well-modeled mergers between compact stellar-mass objects:
black holes ... | [
{
"created": "Thu, 29 Aug 2019 12:15:16 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 2019 15:22:19 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Feb 2020 21:13:15 GMT",
"version": "v3"
}
] | 2020-02-12 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abraham",
"S.",
""
],
[
"Acernese",
"F.",
... | The LIGO Scientific Collaboration and the Virgo Collaboration have cataloged eleven confidently detected gravitational-wave events during the first two observing runs of the advanced detector era. All eleven events were consistent with being from well-modeled mergers between compact stellar-mass objects: black holes or... |
gr-qc/0002027 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation | 35 pages, LaTeX with psfig and html.sty, ISSN 1527-3431, Jorge Pullin
(editor), html, ps and pdf versions at http://gravity.phys.psu.edu/mog.html | null | null | MOG-15 | gr-qc | null | News:
TGG session in the April meeting, by Cliff Will NRC report, by Beverly Berger
MG9 Travel Grant for US researchers, by Jim Isenberg Research Briefs:
How many coalescing binaries are there?, by Vicky Kalogera Recent
developments in black critical phenomena, by Pat Brady Optical black holes?, by
Matt Visser ``... | [
{
"created": "Mon, 7 Feb 2000 14:28:29 GMT",
"version": "v1"
}
] | 2009-03-10 | [
[
"Pullin",
"Jorge",
""
]
] | News: TGG session in the April meeting, by Cliff Will NRC report, by Beverly Berger MG9 Travel Grant for US researchers, by Jim Isenberg Research Briefs: How many coalescing binaries are there?, by Vicky Kalogera Recent developments in black critical phenomena, by Pat Brady Optical black holes?, by Matt Visser ``Branif... |
gr-qc/0308087 | Alexander Unzicker | Alexander Unzicker | Galaxies as Rotating Buckets - a Hypothesis on the Gravitational
Constant Based on Mach's Principle | 12 pages, LaTeX, 2 figures. Minor corrections, some references added | null | null | null | gr-qc astro-ph | null | According to Mach's principle inertia has its reason in the presence of all
masses in the universe. Despite there is a lot of sympathy for this plausible
idea, only a few quantitative frameworks have been proposed to test it. In this
paper a tentative theory is given which is based on Mach's critisism on
Newton's rot... | [
{
"created": "Thu, 28 Aug 2003 18:44:36 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Sep 2003 11:33:23 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Unzicker",
"Alexander",
""
]
] | According to Mach's principle inertia has its reason in the presence of all masses in the universe. Despite there is a lot of sympathy for this plausible idea, only a few quantitative frameworks have been proposed to test it. In this paper a tentative theory is given which is based on Mach's critisism on Newton's rotat... |
1602.00683 | Michael Good | Michael R.R. Good | Reflections on a Black Mirror | 6 pages, 4 figures, Contribution to the 2nd LeCosPA International
Symposium, "Everything About Gravity", Taipei, Taiwan, 2015 | null | 10.1142/9789813203952_0078 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A black mirror is an accelerated boundary that produces particles in an exact
correspondence to an evaporating black hole. We investigate the spectral
dynamics of the particle creation during the formation process.
| [
{
"created": "Sun, 31 Jan 2016 13:22:12 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Oct 2016 04:18:32 GMT",
"version": "v2"
}
] | 2018-07-27 | [
[
"Good",
"Michael R. R.",
""
]
] | A black mirror is an accelerated boundary that produces particles in an exact correspondence to an evaporating black hole. We investigate the spectral dynamics of the particle creation during the formation process. |
2201.01716 | Oleg Tsupko | Gennady S. Bisnovatyi-Kogan and Oleg Yu. Tsupko | Analytical study of higher-order ring images of accretion disk around
black hole | 14 pages, 7 figures | Phys. Rev. D 105, 064040 (2022) | 10.1103/PhysRevD.105.064040 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing of a light source by a black hole leads to appearance
of higher-order images produced by photons that loop around the black hole
before reaching the observer. Higher-order images were widely investigated
numerically and analytically, in particular using so-called strong deflection
limit of gravi... | [
{
"created": "Wed, 5 Jan 2022 17:10:52 GMT",
"version": "v1"
}
] | 2022-09-15 | [
[
"Bisnovatyi-Kogan",
"Gennady S.",
""
],
[
"Tsupko",
"Oleg Yu.",
""
]
] | Gravitational lensing of a light source by a black hole leads to appearance of higher-order images produced by photons that loop around the black hole before reaching the observer. Higher-order images were widely investigated numerically and analytically, in particular using so-called strong deflection limit of gravita... |
1312.7801 | Sharmanthie Fernando | Sharmanthie Fernando | Born-Infeld-de Sitter gravity: Cold, ultracold and Nariai black holes | 12 figures, 17 pages, minor changes, one reference added | International Journal of Modern Physics D 22, 13, 1350080 ( 2013) | 10.1142/S0218271813500806 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have presented interesting properties of the static charged
Born-Infeld-de Sitter black hole. They can have time-like as well as space-like
singularities depending on the parameters of the theory. The degenerate black
holes lead to cold, ultra cold and Nariai black holes. The geometry of such
black ... | [
{
"created": "Mon, 30 Dec 2013 18:07:30 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Aug 2014 17:29:53 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Fernando",
"Sharmanthie",
""
]
] | In this paper, we have presented interesting properties of the static charged Born-Infeld-de Sitter black hole. They can have time-like as well as space-like singularities depending on the parameters of the theory. The degenerate black holes lead to cold, ultra cold and Nariai black holes. The geometry of such black ho... |
1310.0675 | Ivan Arraut | Ivan Arraut | Can a non-local model of gravity reproduce Dark Matter effects in
agreement with MOND? | Final version to appear in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D 23, No. 1 (2014) | 10.1142/S0218271814500084 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I analyze the possibility of reproducing MONDian Dark Matter effects by using
a non-local model of gravity. The model was used before in order to recreate
screening effects for the Cosmological Constant ($\Lambda$) value. Although the
model in the weak-field approximation (in static coordinates) can reproduce the
fie... | [
{
"created": "Wed, 2 Oct 2013 12:18:06 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Oct 2013 15:12:03 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Nov 2013 07:20:59 GMT",
"version": "v3"
}
] | 2013-11-26 | [
[
"Arraut",
"Ivan",
""
]
] | I analyze the possibility of reproducing MONDian Dark Matter effects by using a non-local model of gravity. The model was used before in order to recreate screening effects for the Cosmological Constant ($\Lambda$) value. Although the model in the weak-field approximation (in static coordinates) can reproduce the field... |
1707.08870 | Raissa Mendes | Raissa F. P. Mendes and Eric Poisson | Swimming in spacetime: the view from a Fermi observer | 11 pages, 2 figures. V2: note added regarding interpretation of
results | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An extended test body moving in a curved spacetime does not typically follow
a geodesic, because of forces that arise from couplings between its multipole
moments and the ambient curvature. An illustration of this fact was provided by
Wisdom, who showed that the motion of a quasi-rigid body undergoing cyclic
changes ... | [
{
"created": "Thu, 27 Jul 2017 14:14:09 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2017 19:02:41 GMT",
"version": "v2"
}
] | 2017-12-20 | [
[
"Mendes",
"Raissa F. P.",
""
],
[
"Poisson",
"Eric",
""
]
] | An extended test body moving in a curved spacetime does not typically follow a geodesic, because of forces that arise from couplings between its multipole moments and the ambient curvature. An illustration of this fact was provided by Wisdom, who showed that the motion of a quasi-rigid body undergoing cyclic changes of... |
2408.05142 | Dmitri Fursaev | D.V. Fursaev, E.A.Davydov, I.G. Pirozhenko, V.A.Tainov | Perturbations of classical fields by gravitational shockwaves | 29 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational shockwaves are geometries where components of the transverse
curvature have abrupt behaviour across null hypersurfaces, which are fronts of
the waves. We develop a general approach to describe classical field theories
on such geometries in a linearized approximation, by using free scalar fields
as a mod... | [
{
"created": "Fri, 9 Aug 2024 15:57:02 GMT",
"version": "v1"
}
] | 2024-08-12 | [
[
"Fursaev",
"D. V.",
""
],
[
"Davydov",
"E. A.",
""
],
[
"Pirozhenko",
"I. G.",
""
],
[
"Tainov",
"V. A.",
""
]
] | Gravitational shockwaves are geometries where components of the transverse curvature have abrupt behaviour across null hypersurfaces, which are fronts of the waves. We develop a general approach to describe classical field theories on such geometries in a linearized approximation, by using free scalar fields as a model... |
gr-qc/0601067 | Victor N. Pervushin | V.N. Pervushin and V.A. Zinchuk | Bogoliubov's Integrals of Motion in Quantum Cosmology and Gravity | 12 pages, Proceedings of the II International Conference on
Superintegrable Systems in Classical and Quantum Mechanics, Dubna, Russia,
June 27 - July 1, 2005 (will be published in Yadernaya Fizika, 2006) | Phys.Atom.Nucl.70:593-600,2007 | 10.1134/S1063778807030210 | null | gr-qc | null | Quantum Cosmology and Gravity are formulated here as the primary and
secondary quantizations of the energy constraints by analogy with the
historical formulation of quantum field theory. New fact is that both the
Universe and its matter are created from stable vacuum obtained by the
Bogoliubov-type transformation jus... | [
{
"created": "Tue, 17 Jan 2006 10:06:38 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pervushin",
"V. N.",
""
],
[
"Zinchuk",
"V. A.",
""
]
] | Quantum Cosmology and Gravity are formulated here as the primary and secondary quantizations of the energy constraints by analogy with the historical formulation of quantum field theory. New fact is that both the Universe and its matter are created from stable vacuum obtained by the Bogoliubov-type transformation just ... |
0712.3008 | Giovanni Montani | Giovanni Montani, Marco Valerio Battisti, Riccardo Benini, Giovanni
Imponente | Classical and Quantum Features of the Mixmaster Singularity | 170 pages, 14 figures, ~500 references. Invited review paper to
appear on Int. J. Mod. Phys. A. v2: minor changes, references added. v3:
Conclusions added | Int.J.Mod.Phys.A23:2353-2503,2008 | 10.1142/S0217751X08040275 | null | gr-qc astro-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This review article is devoted to analyze the main properties characterizing
the cosmological singularity associated to the homogeneous and inhomogeneous
Mixmaster model. After the introduction of the main tools required to treat the
cosmological issue, we review in details the main results got along the last
forty y... | [
{
"created": "Tue, 18 Dec 2007 17:45:03 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Mar 2008 16:15:11 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Sep 2008 13:24:57 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Montani",
"Giovanni",
""
],
[
"Battisti",
"Marco Valerio",
""
],
[
"Benini",
"Riccardo",
""
],
[
"Imponente",
"Giovanni",
""
]
] | This review article is devoted to analyze the main properties characterizing the cosmological singularity associated to the homogeneous and inhomogeneous Mixmaster model. After the introduction of the main tools required to treat the cosmological issue, we review in details the main results got along the last forty yea... |
1807.10830 | Ryan Marshman | Ryan J. Marshman, Anupam Mazumdar, Gavin W. Morley, Peter F. Barker,
Steven Hoekstra and Sougato Bose | Mesoscopic Interference for Metric and Curvature (MIMAC) & Gravitational
Wave Detection | 29 pages, 3 figures | New Journal of Physics 22, 083012 (2020) | 10.1088/1367-2630/ab9f6c | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A compact detector for space-time metric and curvature is highly desirable.
Here we show that quantum spatial superpositions of mesoscopic objects, of the
type which would in principle become possible with a combination of state of
the art techniques and taking into account the known sources of decoherence,
could be ... | [
{
"created": "Fri, 27 Jul 2018 20:46:08 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Oct 2018 14:01:40 GMT",
"version": "v2"
},
{
"created": "Sun, 8 Dec 2019 21:54:58 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Jun 2020 09:54:47 GMT",
"version": "v4"
}
] | 2020-08-26 | [
[
"Marshman",
"Ryan J.",
""
],
[
"Mazumdar",
"Anupam",
""
],
[
"Morley",
"Gavin W.",
""
],
[
"Barker",
"Peter F.",
""
],
[
"Hoekstra",
"Steven",
""
],
[
"Bose",
"Sougato",
""
]
] | A compact detector for space-time metric and curvature is highly desirable. Here we show that quantum spatial superpositions of mesoscopic objects, of the type which would in principle become possible with a combination of state of the art techniques and taking into account the known sources of decoherence, could be ex... |
0712.4363 | Andrzej Krolak | Robert J. Budzy\'nski, Witold Kondracki and Andrzej Kr\'olak | Applications of distance between probability distributions to
gravitational wave data analysis | 18 pages, 5 figures | Class.Quant.Grav.25:015005,2008 | 10.1088/0264-9381/25/1/015005 | null | gr-qc | null | We present a definition of the distance between probability distributions.
Our definition is based on the $L_1$ norm on space of probability measures. We
compare our distance with the well-known Kullback-Leibler divergence and with
the proper distance defined using the Fisher matrix as a metric on the
parameter space... | [
{
"created": "Fri, 28 Dec 2007 15:15:14 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Budzyński",
"Robert J.",
""
],
[
"Kondracki",
"Witold",
""
],
[
"Królak",
"Andrzej",
""
]
] | We present a definition of the distance between probability distributions. Our definition is based on the $L_1$ norm on space of probability measures. We compare our distance with the well-known Kullback-Leibler divergence and with the proper distance defined using the Fisher matrix as a metric on the parameter space. ... |
gr-qc/0101018 | Jonathan Wilson | J. A. Vickers and J. P. Wilson (Department of Mathematics, University
of Southampton) | Generalised hyperbolicity: hypersurface singularities | 9 pages, AmSTeX, 2 postscript figures | null | null | null | gr-qc | null | Sufficient conditions for the well-posedness of the initial value problem for
the scalar wave equation are obtained in space-times with hypersurface
singularities
| [
{
"created": "Fri, 5 Jan 2001 10:16:34 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Vickers",
"J. A.",
"",
"Department of Mathematics, University\n of Southampton"
],
[
"Wilson",
"J. P.",
"",
"Department of Mathematics, University\n of Southampton"
]
] | Sufficient conditions for the well-posedness of the initial value problem for the scalar wave equation are obtained in space-times with hypersurface singularities |
gr-qc/0211108 | Lorenzo Iorio | Herbert I.M. Lichtenegger, Lorenzo Iorio, Bahram Mashhoon | The gravitomagnetic clock effect and its possible observation | LaTex2e, 9 pages, no tables, 2 figures, 18 references. Paper
presented at COSPAR 2002 assembly held in Houston, Texas, 10 October 2002-19
October 2002. Expanded version published in Annalen der Physik | AnnalenPhys.15:868-876,2006 | 10.1002/andp.200610214 | null | gr-qc astro-ph | null | The general relativistic gravitomagnetic clock effect involves a coupling
between the orbital motion of a test particle and the rotation of the central
mass and results in a difference in the proper periods of two counter-revolving
satellites. It is shown that at O(c^-2) this effect has a simple analogue in
the elect... | [
{
"created": "Fri, 29 Nov 2002 17:08:41 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Dec 2002 16:16:18 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jul 2003 13:24:15 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Dec 2006 21:12:13 GMT",
"version": "v4"
},
{
"crea... | 2008-11-26 | [
[
"Lichtenegger",
"Herbert I. M.",
""
],
[
"Iorio",
"Lorenzo",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | The general relativistic gravitomagnetic clock effect involves a coupling between the orbital motion of a test particle and the rotation of the central mass and results in a difference in the proper periods of two counter-revolving satellites. It is shown that at O(c^-2) this effect has a simple analogue in the electro... |
1203.2779 | Izzet Sakalli | I.Sakalli | Effect of the cosmological constant in the Hawking radiation of 3D
charged dilaton black hole | null | Astrophys. Space Sci. 340, 317 (2012) | 10.1007/s10509-012-1053-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with the semiclassical radiation spectrum of static and
circularly symmetric 3D charged dilaton black holes with cosmological constant
{\Lambda} in non-asymptotically flat spacetimes. We first review the 3D charged
dilaton black holes which are solution to low-energy string action. The wave
equation ... | [
{
"created": "Tue, 13 Mar 2012 11:50:36 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Feb 2014 10:46:15 GMT",
"version": "v2"
}
] | 2014-02-18 | [
[
"Sakalli",
"I.",
""
]
] | This paper deals with the semiclassical radiation spectrum of static and circularly symmetric 3D charged dilaton black holes with cosmological constant {\Lambda} in non-asymptotically flat spacetimes. We first review the 3D charged dilaton black holes which are solution to low-energy string action. The wave equation of... |
gr-qc/0204011 | Eric Gourgoulhon | T. Damour (IHES), E. Gourgoulhon (LUTH, CNRS, Observatoire de Paris),
P. Grandclement (Northwestern University) | Circular orbits of corotating binary black holes: comparison between
analytical and numerical results | Minor revisions, accepted for publication in Phys. Rev. D, 19 pages,
6 figures | Phys.Rev. D66 (2002) 024007 | 10.1103/PhysRevD.66.024007 | null | gr-qc astro-ph | null | We compare recent numerical results, obtained within a ``helical Killing
vector'' (HKV) approach, on circular orbits of corotating binary black holes to
the analytical predictions made by the effective one body (EOB) method (which
has been recently extended to the case of spinning bodies). On the scale of the
differe... | [
{
"created": "Wed, 3 Apr 2002 15:18:15 GMT",
"version": "v1"
},
{
"created": "Sat, 11 May 2002 15:21:51 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Damour",
"T.",
"",
"IHES"
],
[
"Gourgoulhon",
"E.",
"",
"LUTH, CNRS, Observatoire de Paris"
],
[
"Grandclement",
"P.",
"",
"Northwestern University"
]
] | We compare recent numerical results, obtained within a ``helical Killing vector'' (HKV) approach, on circular orbits of corotating binary black holes to the analytical predictions made by the effective one body (EOB) method (which has been recently extended to the case of spinning bodies). On the scale of the differenc... |
2108.09344 | Eliot Finch | Eliot Finch, Christopher J. Moore | Frequency-Domain Analysis of Black-Hole Ringdowns | 12 pages, 7 figures, plus appendix (accepted in Physical Review D on
16 November 2021) | Phys. Rev. D 104, 123034 (2021) | 10.1103/PhysRevD.104.123034 | LIGO document number P2100303-v2 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a novel, frequency-domain approach to the analysis of the
gravitational-wave ringdown signal of binary black holes and the identification
of quasinormal mode frequencies of the remnant. Our approach avoids the issues
of spectral leakage that would normally be expected (associated with the abrupt
start of t... | [
{
"created": "Fri, 20 Aug 2021 19:53:02 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2022 13:28:10 GMT",
"version": "v2"
}
] | 2022-01-11 | [
[
"Finch",
"Eliot",
""
],
[
"Moore",
"Christopher J.",
""
]
] | We propose a novel, frequency-domain approach to the analysis of the gravitational-wave ringdown signal of binary black holes and the identification of quasinormal mode frequencies of the remnant. Our approach avoids the issues of spectral leakage that would normally be expected (associated with the abrupt start of the... |
1805.02509 | S. Sedigheh Hashemi | S. Sedigheh Hashemi and Nematollah Riazi | Boosted Kaluza- Klein magnetic monopole | 11 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1405.4785 | Annals of Physics (2018) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a Kaluza-Klein vacuum solution which is closely related to the
Gross-Perry-Sorkin (GPS) magnetic monopole. The solution can be obtained from
the Euclidean Taub-NUT solution with an extra compact fifth spatial dimension
within the formalism of Kaluza-Klein reduction. We study its physical
properties as app... | [
{
"created": "Fri, 4 May 2018 06:06:11 GMT",
"version": "v1"
}
] | 2018-05-08 | [
[
"Hashemi",
"S. Sedigheh",
""
],
[
"Riazi",
"Nematollah",
""
]
] | We consider a Kaluza-Klein vacuum solution which is closely related to the Gross-Perry-Sorkin (GPS) magnetic monopole. The solution can be obtained from the Euclidean Taub-NUT solution with an extra compact fifth spatial dimension within the formalism of Kaluza-Klein reduction. We study its physical properties as appea... |
gr-qc/0105025 | Susana Judith Landau | Susana J. Landau, Pablo D. Sisterna and Hector Vucetich | Charge conservation and Equivalence principle | 8 pages | null | null | null | gr-qc | null | The $TH\epsilon\mu$ formalism was developed to study nonmetric theories of
gravitation. In this letter we show that theories that violate Local Lorentz
Invariance (LLI) or Local Position Invariance (LPI) also violate charge
conservation. Using upper bounds on this violation we can put very stringent
limits to violati... | [
{
"created": "Mon, 7 May 2001 16:55:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Landau",
"Susana J.",
""
],
[
"Sisterna",
"Pablo D.",
""
],
[
"Vucetich",
"Hector",
""
]
] | The $TH\epsilon\mu$ formalism was developed to study nonmetric theories of gravitation. In this letter we show that theories that violate Local Lorentz Invariance (LLI) or Local Position Invariance (LPI) also violate charge conservation. Using upper bounds on this violation we can put very stringent limits to violation... |
2310.02838 | Lorenzo Iorio | Lorenzo Iorio | The post-Newtonian motion around an oblate spheroid: the mixed orbital
effects due to the Newtonian oblateness and the post-Newtonian mass monopole
accelerations | LaTex2e, no Figures, no Tables, 20 pages. Version accepted for
publication in General Relativity and Gravitation | Gen. Relativ. Gravit. 55 (2023) 136 | 10.1007/s10714-023-03184-7 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When a test particle moves about an oblate spheroid, it is acted upon, among
other things, by two standard perturbing accelerations. One, of Newtonian
origin, is due to the quadrupole mass moment $J_2$ of the orbited body. The
other one, of the order of $\mathcal{O}\left(1/c^2\right)$, is caused by the
static, post-N... | [
{
"created": "Wed, 4 Oct 2023 14:06:17 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Oct 2023 13:39:13 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Oct 2023 14:10:08 GMT",
"version": "v3"
},
{
"created": "Sun, 19 Nov 2023 21:05:40 GMT",
"version": "v4"
}
] | 2023-12-13 | [
[
"Iorio",
"Lorenzo",
""
]
] | When a test particle moves about an oblate spheroid, it is acted upon, among other things, by two standard perturbing accelerations. One, of Newtonian origin, is due to the quadrupole mass moment $J_2$ of the orbited body. The other one, of the order of $\mathcal{O}\left(1/c^2\right)$, is caused by the static, post-New... |
2103.04239 | Wen-Xiang Chen | Wen-Xiang Chen, Yao-Guang Zheng | The superradiant stability of Kerr-Newman black holes | arXiv admin note: substantial text overlap with arXiv:2105.05394 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, the superradiation stability of Kerr-Newman black holes is
discussed by introducing the condition used in Kerr black holes y into them.
Moreover, the motion equation of the minimal coupled scalar perturbation in a
Kerr-Newman black hole is divided into angular and radial parts. Hod
proved\cite{12} th... | [
{
"created": "Sun, 7 Mar 2021 02:54:01 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Sep 2021 11:03:35 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Oct 2021 07:35:48 GMT",
"version": "v3"
},
{
"created": "Sat, 30 Oct 2021 10:23:38 GMT",
"version": "v4"
},
{
"cr... | 2022-07-26 | [
[
"Chen",
"Wen-Xiang",
""
],
[
"Zheng",
"Yao-Guang",
""
]
] | In this article, the superradiation stability of Kerr-Newman black holes is discussed by introducing the condition used in Kerr black holes y into them. Moreover, the motion equation of the minimal coupled scalar perturbation in a Kerr-Newman black hole is divided into angular and radial parts. Hod proved\cite{12} that... |
2407.05002 | Vsevolod Ivanov | V. R. Ivanov and S. Yu. Vernov | Integrable Cosmological Models with an Arbitrary Number of Scalar Fields | 10 pages | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological models with an arbitrary number of scalar fields
nonminimally coupled to gravity and construct new integrable cosmological
models. In the constructed models, the Ricci scalar is an integral of motion
irrespectively of the type of metric. The general solutions of evolution
equations in the spa... | [
{
"created": "Sat, 6 Jul 2024 08:40:04 GMT",
"version": "v1"
}
] | 2024-07-10 | [
[
"Ivanov",
"V. R.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We consider cosmological models with an arbitrary number of scalar fields nonminimally coupled to gravity and construct new integrable cosmological models. In the constructed models, the Ricci scalar is an integral of motion irrespectively of the type of metric. The general solutions of evolution equations in the spati... |
1907.08343 | Manuel Hohmann | Manuel Hohmann | Hamiltonian of new general relativity using differential forms | 4 pages, no figures; to appear in the conference proceedings of the
10th Alexander Friedmann International Seminar, International Journal of
Modern Physics A, World Scientific Publishing Company | null | 10.1142/S0217751X2040014X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent work we derived the kinematic Hamiltonian and primary constraints
of the new general relativity class of teleparallel gravity theories and showed
that these theories can be grouped in 9 classes, based on the presence or
absence of primary constraints in their Hamiltonian. Here we demonstrate an
alternativ... | [
{
"created": "Fri, 19 Jul 2019 02:06:00 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Hohmann",
"Manuel",
""
]
] | In a recent work we derived the kinematic Hamiltonian and primary constraints of the new general relativity class of teleparallel gravity theories and showed that these theories can be grouped in 9 classes, based on the presence or absence of primary constraints in their Hamiltonian. Here we demonstrate an alternative ... |
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