id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1107.4455 | Christian Boehmer | Christian G. Boehmer, Atifah Mussa, Nicola Tamanini | Existence of relativistic stars in f(T) gravity | 19 pages; substantially revised and extended version, off diagonal
tetrad discussion added | Classical and Quantum Gravity 28 (2011) 245020 | 10.1088/0264-9381/28/24/245020 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the existence of relativistic stars in f(T) modified gravity and
explicitly construct several classes of static perfect fluid solutions. We
derive the conservation equation from the complete f(T) gravity field equations
and present the differences with its teleparallel counterpart. Firstly, we
choose the t... | [
{
"created": "Fri, 22 Jul 2011 09:10:11 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Aug 2011 10:30:29 GMT",
"version": "v2"
}
] | 2012-11-13 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Mussa",
"Atifah",
""
],
[
"Tamanini",
"Nicola",
""
]
] | We examine the existence of relativistic stars in f(T) modified gravity and explicitly construct several classes of static perfect fluid solutions. We derive the conservation equation from the complete f(T) gravity field equations and present the differences with its teleparallel counterpart. Firstly, we choose the tet... |
2311.06388 | Gaston Giribet | Gaston Giribet, Emilio Rubin de Celis, Pedro Schmied | Sub-annular structure in black hole image from gravitational refraction | 6 pages. 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The images of supermassive black holes captured by the Event Horizon
Telescope (EHT) collaboration have allowed us to have access to the physical
processes that occur in the vicinity of the event horizons of these objects.
This has enabled us to learn more about the state of rotation of black holes,
about the formati... | [
{
"created": "Fri, 10 Nov 2023 20:39:28 GMT",
"version": "v1"
}
] | 2023-11-14 | [
[
"Giribet",
"Gaston",
""
],
[
"de Celis",
"Emilio Rubin",
""
],
[
"Schmied",
"Pedro",
""
]
] | The images of supermassive black holes captured by the Event Horizon Telescope (EHT) collaboration have allowed us to have access to the physical processes that occur in the vicinity of the event horizons of these objects. This has enabled us to learn more about the state of rotation of black holes, about the formation... |
gr-qc/0602087 | Arunava Bhadra Dr. | Kabita Sarkar and Arunava Bhadra | Strong field gravitational lensing in scalar tensor theories | 20 pages, published in Class. Quantum Grav., final version, two
references added | Class.Quant.Grav.23:6101-6113,2006 | 10.1088/0264-9381/23/22/002 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Strong field gravitational lensing in the Brans-Dicke theory has been
studied. The deflection angle for photons passing very close to the photon
sphere is estimated for the static spherically symmetric space-time of the
theory and the position and magnification of the relativistic images are
obtained. Modeling the su... | [
{
"created": "Wed, 22 Feb 2006 07:30:26 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2006 10:43:33 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Jan 2024 15:44:37 GMT",
"version": "v3"
}
] | 2024-01-02 | [
[
"Sarkar",
"Kabita",
""
],
[
"Bhadra",
"Arunava",
""
]
] | Strong field gravitational lensing in the Brans-Dicke theory has been studied. The deflection angle for photons passing very close to the photon sphere is estimated for the static spherically symmetric space-time of the theory and the position and magnification of the relativistic images are obtained. Modeling the supe... |
2310.17340 | Romanshu Garg | Romanshu Garg, G. P. Singh, Ashwini R Lalke, Saibal Ray | Cosmological model with linear equation of state parameter in f(R, Lm)
gravity | 18 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine the universe's expansion in $ f(R, L_{m}) $ gravity
for a particular form of $ f(R, L_{m})=\frac{R}{2}+L_{m}^{n}$. The field
equations for flat FLRW metric with matter Lagrangian $ L_{m}=\rho$ are derive.
We derive Hubble parameter in terms of red-shift$(z)$ using the linear form of
Equation... | [
{
"created": "Thu, 26 Oct 2023 12:12:34 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2024 06:04:58 GMT",
"version": "v2"
}
] | 2024-01-26 | [
[
"Garg",
"Romanshu",
""
],
[
"Singh",
"G. P.",
""
],
[
"Lalke",
"Ashwini R",
""
],
[
"Ray",
"Saibal",
""
]
] | In this paper, we examine the universe's expansion in $ f(R, L_{m}) $ gravity for a particular form of $ f(R, L_{m})=\frac{R}{2}+L_{m}^{n}$. The field equations for flat FLRW metric with matter Lagrangian $ L_{m}=\rho$ are derive. We derive Hubble parameter in terms of red-shift$(z)$ using the linear form of Equation o... |
2402.12409 | Zeeshan Gul | M. Zeeshan Gul, M. Sharif and Adeeba Arooj | Viable and Stable Compact Stellar Structures in
$f(\mathcal{Q},\mathcal{T})$ Theory | 31 pages, 12 figures | Fortschritte der Phys. 02(2024)2300221 | 10.1002/prop.202300221 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main objective of this paper is to investigate the impact of
$f(\mathcal{Q},\mathcal{T})$ gravity on the geometry of anisotropic compact
stellar objects, where $\mathcal{Q}$ is non-metricity and $\mathcal{T}$ is the
trace of the energy-momentum tensor. In this perspective, we use the physically
viable non-singula... | [
{
"created": "Sun, 18 Feb 2024 14:24:59 GMT",
"version": "v1"
}
] | 2024-02-21 | [
[
"Gul",
"M. Zeeshan",
""
],
[
"Sharif",
"M.",
""
],
[
"Arooj",
"Adeeba",
""
]
] | The main objective of this paper is to investigate the impact of $f(\mathcal{Q},\mathcal{T})$ gravity on the geometry of anisotropic compact stellar objects, where $\mathcal{Q}$ is non-metricity and $\mathcal{T}$ is the trace of the energy-momentum tensor. In this perspective, we use the physically viable non-singular ... |
1506.08068 | Parthasarathi Mitra | A. Ghosh and P. Mitra | Quantum and classical areas of black hole thermodynamics | 7 pages; to appear in Classical and Quantum Gravity | Class. Quantum Grav. 32 (2015) 165006 | 10.1088/0264-9381/32/16/165006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most calculations of black hole entropy in loop quantum gravity indicate a
term proportional to the area eigenvalue A with a correction involving the
logarithm of A. This violates the additivity of the entropy. An entropy
proportional to A, with a correction term involving the logarithm of the
classical area k, which... | [
{
"created": "Tue, 23 Jun 2015 12:11:38 GMT",
"version": "v1"
}
] | 2015-07-28 | [
[
"Ghosh",
"A.",
""
],
[
"Mitra",
"P.",
""
]
] | Most calculations of black hole entropy in loop quantum gravity indicate a term proportional to the area eigenvalue A with a correction involving the logarithm of A. This violates the additivity of the entropy. An entropy proportional to A, with a correction term involving the logarithm of the classical area k, which i... |
gr-qc/0502012 | Magnus Herberthson | Thomas Backdahl, Magnus Herberthson | Static axisymmetric space-times with prescribed multipole moments | 14 pages | Class.Quant.Grav. 22 (2005) 1607-1621 | 10.1088/0264-9381/22/9/009 | null | gr-qc | null | In this article we develop a method of finding the static axisymmetric
space-time corresponding to any given set of multipole moments. In addition to
an implicit algebraic form for the general solution, we also give a power
series expression for all finite sets of multipole moments. As conjectured by
Geroch we prove ... | [
{
"created": "Thu, 3 Feb 2005 12:08:46 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Backdahl",
"Thomas",
""
],
[
"Herberthson",
"Magnus",
""
]
] | In this article we develop a method of finding the static axisymmetric space-time corresponding to any given set of multipole moments. In addition to an implicit algebraic form for the general solution, we also give a power series expression for all finite sets of multipole moments. As conjectured by Geroch we prove in... |
1207.6846 | Yasusada Nambu | Yasusada Nambu | Wave optics and image formation in gravitational lensing | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss image formation in gravitational lensing systems using wave
optics. Applying the Fresnel-Kirchhoff diffraction formula to waves scattered
by a gravitational potential of a lens object, we demonstrate how images of
source objects are obtained directly from wave functions without using a lens
equation for gr... | [
{
"created": "Mon, 30 Jul 2012 06:39:06 GMT",
"version": "v1"
}
] | 2012-07-31 | [
[
"Nambu",
"Yasusada",
""
]
] | We discuss image formation in gravitational lensing systems using wave optics. Applying the Fresnel-Kirchhoff diffraction formula to waves scattered by a gravitational potential of a lens object, we demonstrate how images of source objects are obtained directly from wave functions without using a lens equation for grav... |
2012.10914 | Xuehai Huang | Long Chen and Xuehai Huang | Discrete Hessian complexes in three dimensions | 38 pages | null | null | null | gr-qc cs.NA math.NA | http://creativecommons.org/licenses/by/4.0/ | One conforming and one non-conforming virtual element Hessian complexes on
tetrahedral grids are constructed based on decompositions of polynomial tensor
space. They are applied to discretize the linearized time-independent
Einstein-Bianchi system.
| [
{
"created": "Sun, 20 Dec 2020 13:12:23 GMT",
"version": "v1"
}
] | 2020-12-22 | [
[
"Chen",
"Long",
""
],
[
"Huang",
"Xuehai",
""
]
] | One conforming and one non-conforming virtual element Hessian complexes on tetrahedral grids are constructed based on decompositions of polynomial tensor space. They are applied to discretize the linearized time-independent Einstein-Bianchi system. |
1103.0585 | Frans Pretorius | Edward Belbruno and Frans Pretorius | A Dynamical Systems Approach to Schwarzschild Null Geodesics | 14 pages, 3 Figures | null | 10.1088/0264-9381/28/19/195007 | null | gr-qc astro-ph.HE math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null geodesics of a Schwarzschild black hole are studied from a dynamical
systems perspective. Written in terms of Kerr-Schild coordinates, the null
geodesic equation takes on the simple form of a particle moving under the
influence of a Newtonian central force with an inverse-cubic potential. We
apply a McGehee ... | [
{
"created": "Thu, 3 Mar 2011 00:25:55 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Belbruno",
"Edward",
""
],
[
"Pretorius",
"Frans",
""
]
] | The null geodesics of a Schwarzschild black hole are studied from a dynamical systems perspective. Written in terms of Kerr-Schild coordinates, the null geodesic equation takes on the simple form of a particle moving under the influence of a Newtonian central force with an inverse-cubic potential. We apply a McGehee tr... |
1002.1560 | Mario La Camera | M. La Camera | Time-dependent extra dimension and higher-dimensional modifications to
the matter content in FRW spacetimes | 13 pages, to appear in MPLA | Mod. Phys. Lett. A25:781-792, 2010 | 10.1142/S021773231003286X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we suggest that higher-dimensional modifications to the matter
content in FRW spacetimes can be obtained not only, as first considered by
Ponce de Leon, referring to "moving" 4D hypersurfaces non-orthogonal to the
time-dependent extra dimension of an embedding 5D manifold, but also referring
to "fixed" 4... | [
{
"created": "Mon, 8 Feb 2010 10:00:54 GMT",
"version": "v1"
}
] | 2010-05-27 | [
[
"La Camera",
"M.",
""
]
] | In this work we suggest that higher-dimensional modifications to the matter content in FRW spacetimes can be obtained not only, as first considered by Ponce de Leon, referring to "moving" 4D hypersurfaces non-orthogonal to the time-dependent extra dimension of an embedding 5D manifold, but also referring to "fixed" 4D ... |
0707.1128 | Tiberiu Harko | T. Harko, K. S. Cheng | The virial theorem and the dynamics of clusters of galaxies in the brane
world models | 29 pages, no figures, accepted for publication in PRD | Phys.Rev.D76:044013,2007 | 10.1103/PhysRevD.76.044013 | null | gr-qc astro-ph hep-th | null | A version of the virial theorem, which takes into account the effects of the
non-compact extra-dimensions, is derived in the framework of the brane world
models. In the braneworld scenario, the four dimensional effective Einstein
equation has some extra terms, called dark radiation and dark pressure,
respectively, wh... | [
{
"created": "Sun, 8 Jul 2007 09:08:45 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Aug 2007 02:15:42 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Harko",
"T.",
""
],
[
"Cheng",
"K. S.",
""
]
] | A version of the virial theorem, which takes into account the effects of the non-compact extra-dimensions, is derived in the framework of the brane world models. In the braneworld scenario, the four dimensional effective Einstein equation has some extra terms, called dark radiation and dark pressure, respectively, whic... |
2204.09132 | Stephen Adler | Stephen L. Adler | Solar system relativity tests, formulas for light deflection by a
central mass, and modification of the lens equation, for a Weyl scaling
invariant dark energy | 15 pages, 1 figure | General Relativity and Gravitation 55:1 (2023) | 10.1007/s10714-022-03049-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We estimate the changes in solar system tests of general relativity when
"dark energy" arises from a Weyl scaling invariant action, using the modified
Schwarzschild-like spherically symmetric solution obtained in this case by
Adler and Ramazano\vglu. We show that the standard results of general
relativity are modifie... | [
{
"created": "Tue, 19 Apr 2022 21:16:07 GMT",
"version": "v1"
},
{
"created": "Wed, 11 May 2022 00:55:59 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Sep 2022 16:03:06 GMT",
"version": "v3"
},
{
"created": "Wed, 9 Nov 2022 11:34:08 GMT",
"version": "v4"
}
] | 2023-01-11 | [
[
"Adler",
"Stephen L.",
""
]
] | We estimate the changes in solar system tests of general relativity when "dark energy" arises from a Weyl scaling invariant action, using the modified Schwarzschild-like spherically symmetric solution obtained in this case by Adler and Ramazano\vglu. We show that the standard results of general relativity are modified ... |
gr-qc/0610051 | Paul Sutter | P. M. Sutter, Tsunefumi Tanaka | Vacuum Energy Density for Massless Scalar Fields in Flat Homogeneous
Spacetime Manifolds with Nontrivial Topology | 25 pages, 11 figures | Phys.Rev. D74 (2006) 024023 | 10.1103/PhysRevD.74.024023 | null | gr-qc | null | Although the observed universe appears to be geometrically flat, it could
have one of 18 global topologies. A constant-time slice of the spacetime
manifold could be a torus, Mobius strip, Klein bottle, or others. This global
topology of the universe imposes boundary conditions on quantum fields and
affects the vacuum... | [
{
"created": "Wed, 11 Oct 2006 01:01:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sutter",
"P. M.",
""
],
[
"Tanaka",
"Tsunefumi",
""
]
] | Although the observed universe appears to be geometrically flat, it could have one of 18 global topologies. A constant-time slice of the spacetime manifold could be a torus, Mobius strip, Klein bottle, or others. This global topology of the universe imposes boundary conditions on quantum fields and affects the vacuum e... |
gr-qc/9511077 | null | B. L. Hu | Semiclassical Gravity and Mesoscopic Physics | Latex 20 pages | null | null | University of Maryland Physics Preprint 96-50 | gr-qc cond-mat | null | Developments in theoretical cosmology in the recent decades show a close
connection with particle physics, quantum gravity and unified theories. Answers
or hints to many fundamental questions in cosmology like the homogeneity and
isotropy of the Universe, the sources of structure formation and entropy
generation, and... | [
{
"created": "Tue, 28 Nov 1995 06:10:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hu",
"B. L.",
""
]
] | Developments in theoretical cosmology in the recent decades show a close connection with particle physics, quantum gravity and unified theories. Answers or hints to many fundamental questions in cosmology like the homogeneity and isotropy of the Universe, the sources of structure formation and entropy generation, and t... |
gr-qc/0403044 | Alexander I. Nesterov | Alexander I. Nesterov | Quasigroups, Asymptotic Symmetries and Conservation Laws in General
Relativity | RevTeX4, 5 pages | Phys.Rev.D56:7498-7502,1997 | 10.1103/PhysRevD.56.R7498 | null | gr-qc | null | A new quasigroup approach to conservation laws in general relativity is
applied to study asymptotically flat at future null infinity spacetime. The
infinite-parametric Newman-Unti group of asymptotic symmetries is reduced to
the Poincar\'e quasigroup and the Noether charge associated with any element of
the Poincar\'... | [
{
"created": "Thu, 11 Mar 2004 03:00:17 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Nesterov",
"Alexander I.",
""
]
] | A new quasigroup approach to conservation laws in general relativity is applied to study asymptotically flat at future null infinity spacetime. The infinite-parametric Newman-Unti group of asymptotic symmetries is reduced to the Poincar\'e quasigroup and the Noether charge associated with any element of the Poincar\'e ... |
1110.3358 | Ronald Adler | Ronald J. Adler | Comment on the cosmological constant and a gravitational alpha | 7 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We call attention to a simple analogy between atomic physics and cosmology.
Both have two characteristic length scales. In atomic physics the lengths are
the Compton wavelength of the electron and the Bohr radius; the ratio of these
two lengths is the fine structure constant, $\alpha=7.30\times10^{-3}$. In
cosmology ... | [
{
"created": "Fri, 14 Oct 2011 23:20:08 GMT",
"version": "v1"
}
] | 2011-10-18 | [
[
"Adler",
"Ronald J.",
""
]
] | We call attention to a simple analogy between atomic physics and cosmology. Both have two characteristic length scales. In atomic physics the lengths are the Compton wavelength of the electron and the Bohr radius; the ratio of these two lengths is the fine structure constant, $\alpha=7.30\times10^{-3}$. In cosmology we... |
1603.01539 | Ashok Singal | Ashok K. Singal | Horizon, homogeneity and flatness problems -- do their resolutions
really depend upon inflation? | 14 pages, 2 figures, 1 table | Eur. Phys. J. C (2024) 84:385 | 10.1140/epjc/s10052-024-12740-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the horizon problem encountered in standard text-books or
review papers on cosmology is, in general, derived for world models based on
Robertson-Walker line element where homogeneity and isotropy of the universe --
\`a la cosmological principle -- is assumed to begin with and is guaranteed for
all e... | [
{
"created": "Fri, 4 Mar 2016 17:09:26 GMT",
"version": "v1"
},
{
"created": "Wed, 10 May 2017 14:00:46 GMT",
"version": "v2"
},
{
"created": "Sun, 4 Jun 2017 02:57:24 GMT",
"version": "v3"
},
{
"created": "Thu, 27 Sep 2018 01:29:07 GMT",
"version": "v4"
},
{
"cre... | 2024-04-18 | [
[
"Singal",
"Ashok K.",
""
]
] | We point out that the horizon problem encountered in standard text-books or review papers on cosmology is, in general, derived for world models based on Robertson-Walker line element where homogeneity and isotropy of the universe -- \`a la cosmological principle -- is assumed to begin with and is guaranteed for all epo... |
2406.18329 | Umananda Dev Goswami | Ronit Karmakar and Umananda Dev Goswami | Quasinormal modes, thermodynamics and shadow of black holes in
Hu-Sawicki f(R) gravity theory | 13 pages, 8 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We derive novel black hole solutions in a modified gravity theory, namely the
Hu-Sawicki model of $f(R)$ gravity. After obtaining the black hole solution, we
study the horizon radius of the black hole from the metric and then analyse the
dependence of the model parameters on the horizon. We then use the 6th-order
WKB... | [
{
"created": "Wed, 26 Jun 2024 13:18:34 GMT",
"version": "v1"
}
] | 2024-06-27 | [
[
"Karmakar",
"Ronit",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We derive novel black hole solutions in a modified gravity theory, namely the Hu-Sawicki model of $f(R)$ gravity. After obtaining the black hole solution, we study the horizon radius of the black hole from the metric and then analyse the dependence of the model parameters on the horizon. We then use the 6th-order WKB m... |
2009.13293 | Abdul Jawad | Nadeem Azhar, Abdul Jawad, Shamaila Rani | Generalized Gravitational Baryogenesis of Well-Known $f(T,T_G)$ and
$f(T,B)$ Models | 24 pages, 08 Figures, Accepted in Physics of Dark Universe | null | 10.1016/j.dark.2020.100724 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The baryogenesis presents the theoretical mechanism that describes the
matter-antimatter asymmetry in the history of early universe. In this work, we
investigate the gravitational baryogenesis phenomena in the frameworks of $f(T,
T_G)$ (where $T$ and $T_G$ are the torsion scalar and teleparallel equivalent
to the Gau... | [
{
"created": "Fri, 25 Sep 2020 14:06:49 GMT",
"version": "v1"
}
] | 2020-09-29 | [
[
"Azhar",
"Nadeem",
""
],
[
"Jawad",
"Abdul",
""
],
[
"Rani",
"Shamaila",
""
]
] | The baryogenesis presents the theoretical mechanism that describes the matter-antimatter asymmetry in the history of early universe. In this work, we investigate the gravitational baryogenesis phenomena in the frameworks of $f(T, T_G)$ (where $T$ and $T_G$ are the torsion scalar and teleparallel equivalent to the Gauss... |
2012.11515 | Zichang Huang | Muxin Han, Zichang Huang, Hongguang Liu, Dongxue Qu, Yidun Wan | Spinfoam on Lefschetz Thimble: Markov Chain Monte-Carlo Computation of
Lorentzian Spinfoam Propagator | 26 pages, 8 figures, 11 tables | Phys. Rev. D 103, 084026 (2021) | 10.1103/PhysRevD.103.084026 | null | gr-qc hep-lat hep-th math-ph math.MP physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute numerically the Lorentzian Engle-Pereira-Rovelli-Livine (EPRL)
spinfoam propagator on a 4-simplex, by adapting the methods of Lefschetz
thimble and Markov Chain Monte-Carlo to oscillatory spinfoam integrals. Our
method can compute any spinfoam observables at relatively large spins. We
obtain the numerical ... | [
{
"created": "Mon, 21 Dec 2020 17:29:10 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Mar 2021 09:43:33 GMT",
"version": "v2"
}
] | 2021-04-19 | [
[
"Han",
"Muxin",
""
],
[
"Huang",
"Zichang",
""
],
[
"Liu",
"Hongguang",
""
],
[
"Qu",
"Dongxue",
""
],
[
"Wan",
"Yidun",
""
]
] | We compute numerically the Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam propagator on a 4-simplex, by adapting the methods of Lefschetz thimble and Markov Chain Monte-Carlo to oscillatory spinfoam integrals. Our method can compute any spinfoam observables at relatively large spins. We obtain the numerical re... |
2011.09207 | Iver Brevik | I. Brevik and A. V. Timoshkin | Thermodynamic aspects of entropic cosmology with viscosity | 12 pages, no figures. To appear in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D 30, 2150008 (2021) | 10.1142/S0218271821500085 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We describe the evolution of the early and late universe from thermodynamic
considerations, using the generalized non-extensive Tsallis entropy with a
variable exponent. A new element in our analysis is the inclusion of a bulk
viscosity in the description of the cosmic fluid. Using the generalized
Friedmann equation,... | [
{
"created": "Wed, 18 Nov 2020 10:49:58 GMT",
"version": "v1"
}
] | 2021-02-10 | [
[
"Brevik",
"I.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | We describe the evolution of the early and late universe from thermodynamic considerations, using the generalized non-extensive Tsallis entropy with a variable exponent. A new element in our analysis is the inclusion of a bulk viscosity in the description of the cosmic fluid. Using the generalized Friedmann equation, a... |
1503.08377 | Yan Wang | Yan Wang, Gerhard Heinzel, Karsten Danzmann | First stage of LISA data processing II: Alternative filtering dynamic
models for LISA | 12 pages | Phys. Rev. D 92, 044037 (2015) | 10.1103/PhysRevD.92.044037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space-borne gravitational wave detectors, such as (e)LISA, are designed to
operate in the low-frequency band (mHz to Hz), where there is a variety of
gravitational wave sources of great scientific value. To achieve the
extraordinary sensitivity of these detector, the precise synchronization of the
clocks on the separ... | [
{
"created": "Sun, 29 Mar 2015 02:24:33 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Wang",
"Yan",
""
],
[
"Heinzel",
"Gerhard",
""
],
[
"Danzmann",
"Karsten",
""
]
] | Space-borne gravitational wave detectors, such as (e)LISA, are designed to operate in the low-frequency band (mHz to Hz), where there is a variety of gravitational wave sources of great scientific value. To achieve the extraordinary sensitivity of these detector, the precise synchronization of the clocks on the separat... |
gr-qc/9811061 | Robert Mann | R.B. Mann, D. Robbins and T. Ohta | Exact Relativistic Two-Body Motion in Lineal Gravity | latex, 11 pages, 2 figures, final version to appear in Phys. Rev.
Lett | Phys.Rev.Lett.82:3738-3741,1999 | 10.1103/PhysRevLett.82.3738 | WATPHYS-TH98/09 | gr-qc hep-th | null | We consider the N-body problem in (1+1) dimensional lineal gravity. For 2
point masses (N=2) we obtain an exact solution for the relativistic motion. In
the equal mass case we obtain an explicit expression for their proper
separation as a function of their mutual proper time. Our solution gives the
exact Hamiltonian ... | [
{
"created": "Wed, 18 Nov 1998 20:59:49 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 1999 01:24:20 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Mann",
"R. B.",
""
],
[
"Robbins",
"D.",
""
],
[
"Ohta",
"T.",
""
]
] | We consider the N-body problem in (1+1) dimensional lineal gravity. For 2 point masses (N=2) we obtain an exact solution for the relativistic motion. In the equal mass case we obtain an explicit expression for their proper separation as a function of their mutual proper time. Our solution gives the exact Hamiltonian to... |
1402.2731 | Mubasher Jamil | Saqib Hussain, Ibrar Hussain, Mubasher Jamil | Dynamics of a Charged Particle Around a Slowly Rotating Kerr Black Hole
Immersed in Magnetic Field | 20 pages, 12 figures | Eur. Phys. J. C (2014) 74:3210 | 10.1140/epjc/s10052-014-3210-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of a charged particle moving around a slowly rotating Kerr black
hole in the presence of an external magnetic field is investigated. We are
interested to explore the conditions under which the charged particle can
escape from the gravitational field of the black hole after colliding with
another particle... | [
{
"created": "Wed, 12 Feb 2014 04:41:10 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Nov 2014 04:30:58 GMT",
"version": "v2"
}
] | 2014-12-12 | [
[
"Hussain",
"Saqib",
""
],
[
"Hussain",
"Ibrar",
""
],
[
"Jamil",
"Mubasher",
""
]
] | The dynamics of a charged particle moving around a slowly rotating Kerr black hole in the presence of an external magnetic field is investigated. We are interested to explore the conditions under which the charged particle can escape from the gravitational field of the black hole after colliding with another particle. ... |
1203.6173 | Debojit Sarma | Debojit Sarma, Mahadev Patgiri and Faiz Uddin Ahmed | Causality violation in plane wave spacetimes | 10 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is widely held that plane wave spacetimes are causally well behaved which
means that they are free from causal pathologies such as closed timelike curves
or closed null geodesics. In this paper, we show that one can get closed null
geodesics in a plane wave metric by analytically solving the geodesic
equations.
| [
{
"created": "Wed, 28 Mar 2012 06:20:28 GMT",
"version": "v1"
}
] | 2012-03-29 | [
[
"Sarma",
"Debojit",
""
],
[
"Patgiri",
"Mahadev",
""
],
[
"Ahmed",
"Faiz Uddin",
""
]
] | It is widely held that plane wave spacetimes are causally well behaved which means that they are free from causal pathologies such as closed timelike curves or closed null geodesics. In this paper, we show that one can get closed null geodesics in a plane wave metric by analytically solving the geodesic equations. |
2011.00626 | Udaykrishna Thattarampilly | Micha{\l} Artymowski, Ido Ben-Dayan and Udaykrishna Thattarampilly | Sourced fluctuations in generic slow contraction | This version matches the Published version of this article. We have
added an extended discussion on irrelevance of sub horizon modes | null | 10.1088/1475-7516/2021/06/010 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a set of generic conditions for the slow contracting Universe
and for a narrowed-down category of models called fast-roll models. We present
general conditions for super horizon freeze-out of scalar and tensor
perturbations and show that any fast-roll model satisfies them, as in the case
of inflation. We... | [
{
"created": "Sun, 1 Nov 2020 21:00:06 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Aug 2021 23:15:56 GMT",
"version": "v2"
}
] | 2021-08-23 | [
[
"Artymowski",
"Michał",
""
],
[
"Ben-Dayan",
"Ido",
""
],
[
"Thattarampilly",
"Udaykrishna",
""
]
] | We introduce a set of generic conditions for the slow contracting Universe and for a narrowed-down category of models called fast-roll models. We present general conditions for super horizon freeze-out of scalar and tensor perturbations and show that any fast-roll model satisfies them, as in the case of inflation. We a... |
2101.04445 | Tiberiu Harko | Bruno J. Barros, Zahra Haghani, Tiberiu Harko, Francisco S. N. Lobo | Static spherically symmetric three-form stars | 23 pages, 24 figures; minor modifications, accepted for publication
in EPJC | Eur. Phys. J. C 81, 307 (2021) | 10.1140/epjc/s10052-021-09105-9 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider interior static and spherically symmetric solutions in a gravity
theory that extends the standard Hilbert-Einstein action with a Lagrangian
constructed from a three-form field $A_{\alpha \beta \gamma}$, which generates,
via the field strength and a potential term, a new component in the total
energy-momen... | [
{
"created": "Tue, 12 Jan 2021 12:37:23 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2021 07:27:10 GMT",
"version": "v2"
}
] | 2021-04-14 | [
[
"Barros",
"Bruno J.",
""
],
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We consider interior static and spherically symmetric solutions in a gravity theory that extends the standard Hilbert-Einstein action with a Lagrangian constructed from a three-form field $A_{\alpha \beta \gamma}$, which generates, via the field strength and a potential term, a new component in the total energy-momentu... |
gr-qc/9801046 | Murat Ozer | Murat \"Ozer | Implications of a Quantum Mechanical Treatment of the Universe | LaTex, 5 pages, 1 figure, to be published in Mod. Phys. Lett. A | Mod.Phys.Lett. A13 (1998) 347-352 | 10.1142/S0217732398000401 | null | gr-qc astro-ph hep-th | null | We attempt to treat the very early Universe according to quantum mechanics.
Identifying the scale factor of the Universe with the width of the wave packet
associated with it, we show that there cannot be an initial singularity and
that the Universe expands. Invoking the correspondence principle, we obtain the
scale f... | [
{
"created": "Wed, 14 Jan 1998 06:50:00 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Özer",
"Murat",
""
]
] | We attempt to treat the very early Universe according to quantum mechanics. Identifying the scale factor of the Universe with the width of the wave packet associated with it, we show that there cannot be an initial singularity and that the Universe expands. Invoking the correspondence principle, we obtain the scale fac... |
gr-qc/9812049 | Jose Antonio Belinchon | J. A. Belinchon | Cosmological models with bulk viscosity in presence of adiabatic matter
creation and with G, c and Lambda variables | 12 pages. We have been rewriting and completing the bibliography of
this paper. Submitted to General Relativity and Gravitation | Gen.Rel.Grav. 32 (2000) 1487-1498 | 10.1023/A:1001930017624 | null | gr-qc physics.space-ph | null | Some properties of cosmological models with a time variable bulk viscous
coefficient in presence of adiabatic mater creation and G, c, Lambda variables
are investigated in the framework of flat FRW line element. We trivially find a
set of solutions through Dimensional Analysis. In all the studied cases it is
found th... | [
{
"created": "Tue, 15 Dec 1998 11:10:25 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Apr 1999 05:32:31 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Belinchon",
"J. A.",
""
]
] | Some properties of cosmological models with a time variable bulk viscous coefficient in presence of adiabatic mater creation and G, c, Lambda variables are investigated in the framework of flat FRW line element. We trivially find a set of solutions through Dimensional Analysis. In all the studied cases it is found that... |
2206.03437 | Angel Rincon | Grigoris Panotopoulos and Angel Rincon | Orbits of light rays in (1+2)-dimensional Einstein-power-Maxwell
gravity: Exact analytical solution to the null geodesic equations | 8 pages, 4 figures, to appear in Annals of Physics. arXiv admin note:
text overlap with arXiv:2104.13611 | null | 10.1016/j.aop.2022.168947 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study photon orbits within (1+2)-dimensional Einstein-power-Maxwell
non-linear electrodynamics assuming a static and circularly symmetric
background. An exact analytical solution to the null geodesic equations for
light rays is obtained in terms of the Weierstra{\ss} function. We investigate
in detail the impact o... | [
{
"created": "Tue, 7 Jun 2022 16:45:53 GMT",
"version": "v1"
}
] | 2022-07-13 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincon",
"Angel",
""
]
] | We study photon orbits within (1+2)-dimensional Einstein-power-Maxwell non-linear electrodynamics assuming a static and circularly symmetric background. An exact analytical solution to the null geodesic equations for light rays is obtained in terms of the Weierstra{\ss} function. We investigate in detail the impact of ... |
1012.2766 | Emily Duffy | Emily M. Duffy, Brien C. Nolan | Odd Parity Perturbations of the Self-Similar LTB Spacetime | 36 pages | Class. Quantum Grav. 28: 105020, 2011 | 10.1088/0264-9381/28/10/105020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the behaviour of odd-parity perturbations of those self-similar
Lema\^{i}tre-Tolman-Bondi spacetimes which admit a naked singularity. We find
that a perturbation which evolves from initially regular data remains finite on
the Cauchy horizon. Finiteness is demonstrated by considering the behaviour of
suita... | [
{
"created": "Mon, 13 Dec 2010 15:37:46 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Apr 2011 14:35:13 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Duffy",
"Emily M.",
""
],
[
"Nolan",
"Brien C.",
""
]
] | We consider the behaviour of odd-parity perturbations of those self-similar Lema\^{i}tre-Tolman-Bondi spacetimes which admit a naked singularity. We find that a perturbation which evolves from initially regular data remains finite on the Cauchy horizon. Finiteness is demonstrated by considering the behaviour of suitabl... |
2302.00295 | Yu-Tong Wang | Hao-Yang Liu, Yu-Tong Wang | Self-supervised learning for gravitational wave signal identification | 11 pages, 9 figures,V2: some figures and corresponding fixes have
been added | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/publicdomain/zero/1.0/ | The computational cost of searching for gravitational wave (GW) signals in
low latency has always been a matter of concern. We present a self-supervised
learning model applicable to the GW detection. Based on simulated massive black
hole binary signals in synthetic Gaussian noise representative of space-based
GW dete... | [
{
"created": "Wed, 1 Feb 2023 07:51:11 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Sep 2023 10:02:54 GMT",
"version": "v2"
}
] | 2023-09-08 | [
[
"Liu",
"Hao-Yang",
""
],
[
"Wang",
"Yu-Tong",
""
]
] | The computational cost of searching for gravitational wave (GW) signals in low latency has always been a matter of concern. We present a self-supervised learning model applicable to the GW detection. Based on simulated massive black hole binary signals in synthetic Gaussian noise representative of space-based GW detect... |
gr-qc/0105068 | Jose Geraldo Pereira | R. Aldrovandi, A. L. Barbosa, M. Calcada, J. G. Pereira | Kinematics of a Spacetime with an Infinite Cosmological Constant | RevTex, 7 pages, no figures. Presentation changes, including a new
Title. Version to appear in Found. Phys. Lett | Found.Phys. 33 (2003) 613-624 | null | null | gr-qc hep-th | null | A solution of the sourceless Einstein's equation with an infinite value for
the cosmological constant \Lambda is discussed by using Inonu-Wigner
contractions of the de Sitter groups and spaces. When \Lambda --> infinity,
spacetime becomes a four-dimensional cone, dual to Minkowski space by a
spacetime inversion. This... | [
{
"created": "Fri, 18 May 2001 17:53:57 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Dec 2002 17:53:06 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Aldrovandi",
"R.",
""
],
[
"Barbosa",
"A. L.",
""
],
[
"Calcada",
"M.",
""
],
[
"Pereira",
"J. G.",
""
]
] | A solution of the sourceless Einstein's equation with an infinite value for the cosmological constant \Lambda is discussed by using Inonu-Wigner contractions of the de Sitter groups and spaces. When \Lambda --> infinity, spacetime becomes a four-dimensional cone, dual to Minkowski space by a spacetime inversion. This i... |
gr-qc/0602043 | Farook Rahaman | F. Rahaman, P.Ghosh, M.Kalam and K. Gayen | Higher dimensional global monopole with cosmological term | 9 pages | Mod.Phys.Lett.A20:1627-1634,2005 | 10.1142/S0217732305013940 | null | gr-qc | null | We investigate the space-time of a global monopole in a five dimensional
space-time in presence of the cosmological term. Also the gravitational
properties of the monopole solution are discussed.
| [
{
"created": "Mon, 13 Feb 2006 08:17:15 GMT",
"version": "v1"
}
] | 2009-09-01 | [
[
"Rahaman",
"F.",
""
],
[
"Ghosh",
"P.",
""
],
[
"Kalam",
"M.",
""
],
[
"Gayen",
"K.",
""
]
] | We investigate the space-time of a global monopole in a five dimensional space-time in presence of the cosmological term. Also the gravitational properties of the monopole solution are discussed. |
gr-qc/0601097 | Diego Meschini | Diego Meschini | Planck-scale physics: facts and beliefs | 14 pages, Latex | Found.Sci.12:277-294,2007 | 10.1007/s10699-006-9102-3 | null | gr-qc | null | The relevance of the Planck scale to a theory of quantum gravity has become a
worryingly little examined assumption that goes unchallenged in the majority of
research in this area. However, in all scientific honesty, the significance of
Planck's natural units in a future physical theory of spacetime is only a
plausib... | [
{
"created": "Mon, 23 Jan 2006 18:41:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Meschini",
"Diego",
""
]
] | The relevance of the Planck scale to a theory of quantum gravity has become a worryingly little examined assumption that goes unchallenged in the majority of research in this area. However, in all scientific honesty, the significance of Planck's natural units in a future physical theory of spacetime is only a plausible... |
1003.1194 | Babak Vakili | B. Vakili, P. Pedram and S. Jalalzadeh | Late time acceleration in a deformed phase space model of dilaton
cosmology | 10 pages, 2 figures, to appear in PLB, typos corrected | Phys. Lett. B687:119-123,2010 | 10.1016/j.physletb.2010.03.016 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of noncommutativity on the phase space of a dilatonic
cosmological model is investigated. The existence of such noncommutativity
results in a deformed Poisson algebra between the minisuperspace variables and
their momenta conjugate. For an exponential dilaton potential, the exact
solutions in the commutat... | [
{
"created": "Fri, 5 Mar 2010 06:14:10 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2010 06:50:29 GMT",
"version": "v2"
}
] | 2010-04-30 | [
[
"Vakili",
"B.",
""
],
[
"Pedram",
"P.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | The effects of noncommutativity on the phase space of a dilatonic cosmological model is investigated. The existence of such noncommutativity results in a deformed Poisson algebra between the minisuperspace variables and their momenta conjugate. For an exponential dilaton potential, the exact solutions in the commutativ... |
0707.1877 | Dieter Brill | Dieter Brill, Puneet Khetarpal and Vijay Kaul | Horizons in 2+1-dimensional collapse of particles | 10 pages, 5 figures | Pramana69:,2007 | 10.1007/s12043-007-0113-6 | null | gr-qc | null | A simple, geometrical construction is given for three-dimensional spacetimes
with negative cosmological constant that contain two particles colliding
head-on. Depending on parameters like particle masses and distance, the
combined geometry will the that of a particle, or of a black hole. In the black
hole case the ho... | [
{
"created": "Thu, 12 Jul 2007 20:12:42 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Brill",
"Dieter",
""
],
[
"Khetarpal",
"Puneet",
""
],
[
"Kaul",
"Vijay",
""
]
] | A simple, geometrical construction is given for three-dimensional spacetimes with negative cosmological constant that contain two particles colliding head-on. Depending on parameters like particle masses and distance, the combined geometry will the that of a particle, or of a black hole. In the black hole case the hori... |
0706.1189 | Carles Bona | Daniela Alic, Carles Bona, Carles Bona-Casas and Joan Mass\'o | Efficient implementation of finite volume methods in Numerical
Relativity | Revised version, 10 pages, 6 figures. To appear in Phys. Rev. D | Phys.Rev.D76:104007,2007 | 10.1103/PhysRevD.76.104007 | null | gr-qc | null | Centered finite volume methods are considered in the context of Numerical
Relativity. A specific formulation is presented, in which third-order space
accuracy is reached by using a piecewise-linear reconstruction. This
formulation can be interpreted as an 'adaptive viscosity' modification of
centered finite differenc... | [
{
"created": "Fri, 8 Jun 2007 15:08:06 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Aug 2007 11:29:19 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alic",
"Daniela",
""
],
[
"Bona",
"Carles",
""
],
[
"Bona-Casas",
"Carles",
""
],
[
"Massó",
"Joan",
""
]
] | Centered finite volume methods are considered in the context of Numerical Relativity. A specific formulation is presented, in which third-order space accuracy is reached by using a piecewise-linear reconstruction. This formulation can be interpreted as an 'adaptive viscosity' modification of centered finite difference ... |
gr-qc/0103077 | Edward N. Glass | E.N. Glass and J.P. Krisch (Department of Physics, University of
Michigan, Ann Arbor, Michgan) | Dimension in a Radiative Stellar Atmosphere | to appear in Gen. Rel. Grav | Gen.Rel.Grav. 33 (2001) 1449-1458 | 10.1023/A:1012232608703 | MCTP-01-15 | gr-qc | null | Dimensional scales are examined in an extended 3+1 Vaidya atmosphere
surrounding a Schwarzschild source. At one scale, the Vaidya null fluid
vanishes and the spacetime contains only a single spherical 2-surface. Both of
these behaviors can be addressed by including higher dimensions in the
spacetime metric.
| [
{
"created": "Thu, 22 Mar 2001 04:53:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Glass",
"E. N.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
],
[
"Krisch",
"J. P.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
]
] | Dimensional scales are examined in an extended 3+1 Vaidya atmosphere surrounding a Schwarzschild source. At one scale, the Vaidya null fluid vanishes and the spacetime contains only a single spherical 2-surface. Both of these behaviors can be addressed by including higher dimensions in the spacetime metric. |
1905.07155 | Nan Li | Bing-Yu Su, Yuan-Yuan Wang, Nan Li | The Hawking-Page phase transitions in the extended phase space in the
Gauss-Bonnet gravity | 13 pages, 13 figures | Eur. Phys. J. C 80, 305 (2020) | 10.1140/epjc/s10052-020-7870-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the Hawking-Page phase transitions between the black holes and
thermal anti-de Sitter (AdS) space are studied with the Gauss-Bonnet term in
the extended phase space, in which the varying cosmological constant plays the
role of an effective thermodynamic pressure. The Gauss-Bonnet term exhibits its
effe... | [
{
"created": "Fri, 17 May 2019 08:00:34 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Apr 2020 07:53:21 GMT",
"version": "v2"
}
] | 2020-04-22 | [
[
"Su",
"Bing-Yu",
""
],
[
"Wang",
"Yuan-Yuan",
""
],
[
"Li",
"Nan",
""
]
] | In this paper, the Hawking-Page phase transitions between the black holes and thermal anti-de Sitter (AdS) space are studied with the Gauss-Bonnet term in the extended phase space, in which the varying cosmological constant plays the role of an effective thermodynamic pressure. The Gauss-Bonnet term exhibits its effect... |
1508.02827 | Kiyoshi Shiraishi | Nahomi Kan (National Institute of Technology, Gifu College) and
Kiyoshi Shiraishi (Graduate School of Science and Engineering, Yamaguchi
University) | Generic Scalar Potentials in Geometric Scalar Gravity | 19 pages, 6 figures. Note added, references added, discussion
improved | J. Theor. Appl. Phys.,10, pp. 113--121 (2016) | 10.1007/s40094-016-0208-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a generic form of the scalar potential appearing in the geometric
scalar theory of gravity. We find the conditions on the potential by
considering weak and strong gravity. The modified black hole solutions are
obtained for generic potentials and the inverse problems on a black hole and on
a spherical body ... | [
{
"created": "Wed, 12 Aug 2015 07:02:24 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2015 05:35:48 GMT",
"version": "v2"
}
] | 2016-07-19 | [
[
"Kan",
"Nahomi",
"",
"National Institute of Technology, Gifu College"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Graduate School of Science and Engineering, Yamaguchi\n University"
]
] | We discuss a generic form of the scalar potential appearing in the geometric scalar theory of gravity. We find the conditions on the potential by considering weak and strong gravity. The modified black hole solutions are obtained for generic potentials and the inverse problems on a black hole and on a spherical body (`... |
gr-qc/0008029 | Irina Radinschi | I. Radinschi | The Energy Distribution in a Static Spherically Symmetric Nonsingular
Black Hole Space-Time | 5 pages, no figures | Mod.Phys.Lett. 15 (2000) 803-807 | 10.1142/S0217732300000785 | null | gr-qc | null | We calculate the energy distribution in a static spherically symmetric
nonsingular black hole space-time by using the Tolman's energy-momentum
complex. All the calculations are performed in quasi-Cartesian coordinates. The
energy distribution is positive everywhere and be equal to zero at origin. We
get the same resu... | [
{
"created": "Mon, 14 Aug 2000 15:43:17 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Radinschi",
"I.",
""
]
] | We calculate the energy distribution in a static spherically symmetric nonsingular black hole space-time by using the Tolman's energy-momentum complex. All the calculations are performed in quasi-Cartesian coordinates. The energy distribution is positive everywhere and be equal to zero at origin. We get the same result... |
2303.15645 | Tristan H\"ubsch | Per Berglund, Andrew Geraci, Tristan H\"ubsch, David Mattingly and
Djordje Minic | Triple Interference, Non-linear Talbot Effect and Gravitization of the
Quantum | Published version: 30 pages, 2 figures. arXiv admin note: text
overlap with arXiv:2203.17137 | Class.Quant.Grav. 40 (2023) 15, 155008 | 10.1088/1361-6382/ace14a | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently we have discussed a new approach to the problem of quantum gravity
in which the quantum mechanical structures that are traditionally fixed, such
as the Fubini-Study metric in the Hilbert space of states, become dynamical and
so implement the idea of gravitizing the quantum. In this paper we elaborate on
a sp... | [
{
"created": "Tue, 28 Mar 2023 00:01:39 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jun 2023 22:28:01 GMT",
"version": "v2"
}
] | 2023-08-30 | [
[
"Berglund",
"Per",
""
],
[
"Geraci",
"Andrew",
""
],
[
"Hübsch",
"Tristan",
""
],
[
"Mattingly",
"David",
""
],
[
"Minic",
"Djordje",
""
]
] | Recently we have discussed a new approach to the problem of quantum gravity in which the quantum mechanical structures that are traditionally fixed, such as the Fubini-Study metric in the Hilbert space of states, become dynamical and so implement the idea of gravitizing the quantum. In this paper we elaborate on a spec... |
2306.03797 | Frans Pretorius | Frans Pretorius | A Survey of Gravitational Waves | 34 pages. To appear in Proceedings of the ICM 2022 | null | null | null | gr-qc astro-ph.HE hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the state of the field of gravitational wave astrophysics, framing
the challenges, current observations, and future prospects within the context
of the predictions of Einstein's theory of general relativity.
| [
{
"created": "Tue, 6 Jun 2023 15:43:00 GMT",
"version": "v1"
}
] | 2023-06-07 | [
[
"Pretorius",
"Frans",
""
]
] | We review the state of the field of gravitational wave astrophysics, framing the challenges, current observations, and future prospects within the context of the predictions of Einstein's theory of general relativity. |
gr-qc/9703075 | Sai Iyer | A. Gopakumar, Bala R. Iyer and Sai Iyer | Second post-Newtonian gravitational radiation reaction for two-body
systems: Nonspinning bodies | 38 pages, REVTeX, no figures, to appear in Phys. Rev. D | Phys.Rev.D55:6030-6053,1997; Erratum-ibid.D57:6562,1998 | 10.1103/PhysRevD.55.6030 10.1103/PhysRevD.57.6562 | null | gr-qc | null | Starting from the recently obtained 2PN accurate forms of the energy and
angular momentum fluxes from inspiralling compact binaries, we deduce the
gravitational radiation reaction to 2PN order beyond the quadrupole
approximation - 4.5PN terms in the equation of motion - using the refined
balance method proposed by Iy... | [
{
"created": "Wed, 26 Mar 1997 04:47:03 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Gopakumar",
"A.",
""
],
[
"Iyer",
"Bala R.",
""
],
[
"Iyer",
"Sai",
""
]
] | Starting from the recently obtained 2PN accurate forms of the energy and angular momentum fluxes from inspiralling compact binaries, we deduce the gravitational radiation reaction to 2PN order beyond the quadrupole approximation - 4.5PN terms in the equation of motion - using the refined balance method proposed by Iyer... |
gr-qc/0204084 | L. C. Garcia de Andrade | L.C.Garcia de Andrade | Ghost neutrinos and radiative Kerr metric in Einstein-Cartan gravity | Latex file | null | null | null | gr-qc | null | Ghost neutrinos in radiative Kerr spacetime endowed with totally
skew-symmetric Cartan contortion is presented. The computations are made by
using the Newman-Penrose (NP) calculus. The model discussed here maybe useful
in several astrophysical applications specially in black hole astrophysics.
| [
{
"created": "Sun, 28 Apr 2002 02:33:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Ghost neutrinos in radiative Kerr spacetime endowed with totally skew-symmetric Cartan contortion is presented. The computations are made by using the Newman-Penrose (NP) calculus. The model discussed here maybe useful in several astrophysical applications specially in black hole astrophysics. |
1601.00055 | Shabbir Ghulam | Ghulam Shabbir, Nisar Ahmed | A note on proper affine symmetry in Kantowski-Sachs and Bianchi type III
space-times | 12 pages | International Journal of Modern Mathematics, Vol. 4 (2009) 201-209 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate proper affine symmetry for the Kantowski-Sachs and Bianchi
type III space-times by using holonomy and decomposability, the rank of the 6X6
Riemann matrix and direct integration techniques. It is shown that the very
special classes of the above space-times admit proper affine vector fields.
| [
{
"created": "Fri, 1 Jan 2016 06:42:57 GMT",
"version": "v1"
}
] | 2016-01-05 | [
[
"Shabbir",
"Ghulam",
""
],
[
"Ahmed",
"Nisar",
""
]
] | We investigate proper affine symmetry for the Kantowski-Sachs and Bianchi type III space-times by using holonomy and decomposability, the rank of the 6X6 Riemann matrix and direct integration techniques. It is shown that the very special classes of the above space-times admit proper affine vector fields. |
1704.04248 | Merced Montesinos | Merced Montesinos, Diego Gonzalez, Mariano Celada, and Bogar Diaz | Reformulation of the symmetries of first-order general relativity | It matches published version in CQG | Class.Quant.Grav.34:205002,2017 | 10.1088/1361-6382/aa89f3 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a new internal gauge symmetry of the n-dimensional Palatini action
with cosmological term (n>3) that is the generalization of three-dimensional
local translations. This symmetry is obtained through the direct application of
the converse of Noether's second theorem on the theory under consideration. We
show ... | [
{
"created": "Thu, 13 Apr 2017 18:21:34 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Sep 2017 20:35:52 GMT",
"version": "v2"
}
] | 2017-09-26 | [
[
"Montesinos",
"Merced",
""
],
[
"Gonzalez",
"Diego",
""
],
[
"Celada",
"Mariano",
""
],
[
"Diaz",
"Bogar",
""
]
] | We report a new internal gauge symmetry of the n-dimensional Palatini action with cosmological term (n>3) that is the generalization of three-dimensional local translations. This symmetry is obtained through the direct application of the converse of Noether's second theorem on the theory under consideration. We show th... |
0802.3474 | Nikolai V. Mitskievich | Nikolai V. Mitskievich | Classification of electromagnetic fields in general relativity and its
physical applications | 28 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | The simplest electromagnetic fields' (general- as well as
special-relativistic) classification is formulated which is based on physically
motivated ideas. According to this classification these fields can belong to
three types (electric, magnetic and null), each of them being split in pure and
impure subtypes. Only p... | [
{
"created": "Sun, 24 Feb 2008 01:10:44 GMT",
"version": "v1"
}
] | 2008-02-26 | [
[
"Mitskievich",
"Nikolai V.",
""
]
] | The simplest electromagnetic fields' (general- as well as special-relativistic) classification is formulated which is based on physically motivated ideas. According to this classification these fields can belong to three types (electric, magnetic and null), each of them being split in pure and impure subtypes. Only pur... |
gr-qc/0501100 | Vicente Jos\'e Bol\'os | V. J. Bol\'os | Geometric description of lightlike foliations by an observer in general
relativity | 14 pages, 4 figures | Math.Proc.Cambridge Phil.Soc. 139 (2005) 181-192 | 10.1017/S0305004105008571 | null | gr-qc | null | We introduce new concepts and properties of lightlike distributions and
foliations (of dimension and co-dimension 1) in a space-time manifold of
dimension $n$, from a purely geometric point of view. Given an observer and a
lightlike distribution $\Omega $ of dimension or co-dimension 1, its lightlike
direction is bro... | [
{
"created": "Mon, 31 Jan 2005 09:54:33 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bolós",
"V. J.",
""
]
] | We introduce new concepts and properties of lightlike distributions and foliations (of dimension and co-dimension 1) in a space-time manifold of dimension $n$, from a purely geometric point of view. Given an observer and a lightlike distribution $\Omega $ of dimension or co-dimension 1, its lightlike direction is broke... |
1405.1753 | Linda Linsefors | Linda Linsefors, Aurelien Barrau | Exhaustive investigation of the duration of inflation in effective
anisotropic loop quantum cosmology | 9 pagaes, 6 figures | Class. Quantum Grav. 32 (2015) 035010 | 10.1088/0264-9381/32/3/035010 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article addresses the issue of estimating the duration in inflation in
bouncing cosmology when anisotropies, inevitably playing an important role, are
taken into account. It is shown that in Bianchi-I loop quantum cosmology, the
higher the shear, the shorter the period of inflation. In a range of
parameters, the... | [
{
"created": "Wed, 7 May 2014 21:07:52 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Nov 2014 13:21:33 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Linsefors",
"Linda",
""
],
[
"Barrau",
"Aurelien",
""
]
] | This article addresses the issue of estimating the duration in inflation in bouncing cosmology when anisotropies, inevitably playing an important role, are taken into account. It is shown that in Bianchi-I loop quantum cosmology, the higher the shear, the shorter the period of inflation. In a range of parameters, the p... |
1810.07497 | John J. Oh | Kyungmin Kim, John J. Oh, Chan Park, and Edwin J. Son | Neutron Star Structure in Ho\v{r}ava-Lifshitz Gravity | 6 pages, 4 figures, 1 table, version to appear in PRD | Phys. Rev. D 103, 044052 (2021) | 10.1103/PhysRevD.103.044052 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present interesting aspects of neutron stars (NSs) from the standpoint of
a modified theory of gravity called Ho\v{r}ava-Lifshitz (HL) gravity. A
deviation from general relativity (GR) in HL gravity can change typical
features of the NS structure. In this study, we investigate the NS structure by
deriving the Tolm... | [
{
"created": "Wed, 17 Oct 2018 12:10:27 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2021 03:03:19 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Kim",
"Kyungmin",
""
],
[
"Oh",
"John J.",
""
],
[
"Park",
"Chan",
""
],
[
"Son",
"Edwin J.",
""
]
] | We present interesting aspects of neutron stars (NSs) from the standpoint of a modified theory of gravity called Ho\v{r}ava-Lifshitz (HL) gravity. A deviation from general relativity (GR) in HL gravity can change typical features of the NS structure. In this study, we investigate the NS structure by deriving the Tolman... |
2011.00676 | Arundhati Dasgupta | Swayamsiddha Maharana, Arundhati Dasgupta | Semiclassical corrections to the photon orbits of a non-rotating black
hole | 22 pages, 4 figures, to appear in IJMPD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief article we discuss the corrections to the photon orbits of a
non-rotating black hole due to semiclassical fluctuations of the metric. It is
found that the photon orbit impact parameter differences with the critical
impact parameter become of the order of the semiclassical fluctuations. We
calculate the ... | [
{
"created": "Mon, 2 Nov 2020 01:54:04 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Oct 2021 15:27:20 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Dec 2023 18:20:11 GMT",
"version": "v3"
}
] | 2023-12-25 | [
[
"Maharana",
"Swayamsiddha",
""
],
[
"Dasgupta",
"Arundhati",
""
]
] | In this brief article we discuss the corrections to the photon orbits of a non-rotating black hole due to semiclassical fluctuations of the metric. It is found that the photon orbit impact parameter differences with the critical impact parameter become of the order of the semiclassical fluctuations. We calculate the ef... |
0901.3172 | Alfredo Sandoval-Villalbazo | A. L. Garcia-Perciante, A. Sandoval-Villalbazo | Remarks on relativistic kinetic theory to first order in the gradients | 17 pages, no figures. Review in special issue of the Journal of
Non-Newtonian Fluid Mechanics dedicated to the 5th International Workshop on
Nonequilibrium Thermodynamics. Cuernavaca, Mexico, 24-28 August 2009. Guest
editors L.S. Garcia-Colin, M. Lopez de Haro and F. Vazquez | J.NonNewton.Fluid Mech.165:1024-1028, 2010 | 10.1016/j.jnnfm.2010.03.007 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we emphasize some conceptual points related to the kinetic
foundations of relativistic hydrodynamics. We summarize previous work and focus
on the construction of the heat flux from a kinetic theory point of view. A
thorough discussion addressing aspects concerning stability and causality under
linear pe... | [
{
"created": "Tue, 20 Jan 2009 23:33:02 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Feb 2010 02:50:58 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Aug 2010 20:26:51 GMT",
"version": "v3"
}
] | 2014-11-18 | [
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Sandoval-Villalbazo",
"A.",
""
]
] | In this paper we emphasize some conceptual points related to the kinetic foundations of relativistic hydrodynamics. We summarize previous work and focus on the construction of the heat flux from a kinetic theory point of view. A thorough discussion addressing aspects concerning stability and causality under linear pert... |
gr-qc/0603120 | Roberto Giambo' | R. Giambo' | Global visibility of naked singularities | null | J.Math.Phys. 47 (2006) 022501 | 10.1063/1.2167919 | null | gr-qc | null | Global visibility of naked singularities is analyzed here for a class of
spherically symmetric spacetimes, extending previous studies - limited to
inhomogeneous dust cloud collapse - to more physical valid situations in which
pressures are non-vanishing. Existence of nonradial geodesics escaping from the
singularity ... | [
{
"created": "Wed, 29 Mar 2006 15:48:54 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Giambo'",
"R.",
""
]
] | Global visibility of naked singularities is analyzed here for a class of spherically symmetric spacetimes, extending previous studies - limited to inhomogeneous dust cloud collapse - to more physical valid situations in which pressures are non-vanishing. Existence of nonradial geodesics escaping from the singularity is... |
2405.04231 | Shinya Tomizawa | Takashi Mishima, Shinya Tomizawa | Nonlinear dynamics driving the conversion of gravitational and
electromagnetic waves in cylindrically symmetric spacetime | 24 pages, 15 figures | null | null | TTI-MATHPHYS-29 | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Using the ``composite harmonic mapping method," we construct exact solutions
for cylindrically symmetric gravitational and electromagnetic waves within the
Einstein-Maxwell system, focusing on the conversion dynamics between these
types of waves. In this approach, we employs two types of geodesic surfaces in
${\mathb... | [
{
"created": "Tue, 7 May 2024 11:52:03 GMT",
"version": "v1"
}
] | 2024-05-08 | [
[
"Mishima",
"Takashi",
""
],
[
"Tomizawa",
"Shinya",
""
]
] | Using the ``composite harmonic mapping method," we construct exact solutions for cylindrically symmetric gravitational and electromagnetic waves within the Einstein-Maxwell system, focusing on the conversion dynamics between these types of waves. In this approach, we employs two types of geodesic surfaces in ${\mathbb ... |
2012.08545 | Eliu Huerta | E. A. Huerta, Asad Khan, Xiaobo Huang, Minyang Tian, Maksim Levental,
Ryan Chard, Wei Wei, Maeve Heflin, Daniel S. Katz, Volodymyr Kindratenko,
Dawei Mu, Ben Blaiszik and Ian Foster | Accelerated, Scalable and Reproducible AI-driven Gravitational Wave
Detection | 17 pages, 5 figures; v2: 12 pages, 6 figures. Accepted to Nature
Astronomy. See also the Behind the Paper blog in Nature Astronomy
"https://astronomycommunity.nature.com/posts/from-disruption-to-sustained-innovation-artificial-intelligence-for-gravitational-wave-astrophysics" | Nat Astron 5, 1062-1068 (2021) | 10.1038/s41550-021-01405-0 | null | gr-qc astro-ph.IM cs.AI cs.DC | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The development of reusable artificial intelligence (AI) models for wider use
and rigorous validation by the community promises to unlock new opportunities
in multi-messenger astrophysics. Here we develop a workflow that connects the
Data and Learning Hub for Science, a repository for publishing AI models, with
the H... | [
{
"created": "Tue, 15 Dec 2020 19:00:29 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 2021 21:44:56 GMT",
"version": "v2"
}
] | 2024-06-25 | [
[
"Huerta",
"E. A.",
""
],
[
"Khan",
"Asad",
""
],
[
"Huang",
"Xiaobo",
""
],
[
"Tian",
"Minyang",
""
],
[
"Levental",
"Maksim",
""
],
[
"Chard",
"Ryan",
""
],
[
"Wei",
"Wei",
""
],
[
"Heflin",
"M... | The development of reusable artificial intelligence (AI) models for wider use and rigorous validation by the community promises to unlock new opportunities in multi-messenger astrophysics. Here we develop a workflow that connects the Data and Learning Hub for Science, a repository for publishing AI models, with the Har... |
1802.07266 | Carlos A. R. Herdeiro | Juan Carlos Degollado, Carlos A. R. Herdeiro, Eugen Radu | Effective stability against superradiance of Kerr black holes with
synchronised hair | 5 pages, 3 figures; v2 typos corrected, note added on the v3 revised
version of arXiv:1711.08464 | null | 10.1016/j.physletb.2018.04.052 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kerr black holes with synchronised hair [arXiv:1403.2757, arXiv:1603.02687]
are a counter example to the no hair conjecture, in General Relativity
minimally coupled to simple matter fields (with mass $\mu$) obeying all energy
conditions. Since these solutions have, like Kerr, an ergoregion it has been a
lingering pos... | [
{
"created": "Tue, 20 Feb 2018 19:00:01 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Apr 2018 18:34:03 GMT",
"version": "v2"
}
] | 2018-05-23 | [
[
"Degollado",
"Juan Carlos",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | Kerr black holes with synchronised hair [arXiv:1403.2757, arXiv:1603.02687] are a counter example to the no hair conjecture, in General Relativity minimally coupled to simple matter fields (with mass $\mu$) obeying all energy conditions. Since these solutions have, like Kerr, an ergoregion it has been a lingering possi... |
1205.4309 | Gunter Scharf | G\"unter Scharf | Dark matter in galaxies according to the tensor-four-scalars theory III | 9 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue the study of the tensor-four-scalars theory which is a
modification of general relativity. We include normal matter by applying the
displace, cut, and reflect method to our previous vacuum solutions with dark
halo. The resulting disklike solution has physical and unphysical features: the
matter density fo... | [
{
"created": "Sat, 19 May 2012 09:02:34 GMT",
"version": "v1"
}
] | 2012-05-22 | [
[
"Scharf",
"Günter",
""
]
] | We continue the study of the tensor-four-scalars theory which is a modification of general relativity. We include normal matter by applying the displace, cut, and reflect method to our previous vacuum solutions with dark halo. The resulting disklike solution has physical and unphysical features: the matter density for ... |
2310.11860 | Jose Navarro-Salas | F. Javier Mara\~n\'on-Gonz\'alez and Jos\'e Navarro-Salas | Adiabatic regularization for spin-$1$ fields | 10 pages. V2: minor changes, misprints corrected, matches the
published version (Phys. Rev. D) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the adiabatic regularization scheme to renormalize Proca fields in
a four-dimensional Friedmann-Lema\^{i}tre-Robertson-Walker spacetime. The
adiabatic method is well established for scalar and spin-$1/2$ fields, but is
not yet fully understood for spin-$1$ fields. We give the details of the
construction an... | [
{
"created": "Wed, 18 Oct 2023 10:22:55 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2023 10:19:58 GMT",
"version": "v2"
}
] | 2023-12-12 | [
[
"Marañón-González",
"F. Javier",
""
],
[
"Navarro-Salas",
"José",
""
]
] | We analyze the adiabatic regularization scheme to renormalize Proca fields in a four-dimensional Friedmann-Lema\^{i}tre-Robertson-Walker spacetime. The adiabatic method is well established for scalar and spin-$1/2$ fields, but is not yet fully understood for spin-$1$ fields. We give the details of the construction and ... |
2107.07947 | Javad Taghizadeh Firouzjaee | Sareh Eslamzadeh, Javad T. Firouzjaee, and Kourosh Nozari | Radiation from Einstein-Gauss-Bonnet de Sitter Black Hole via Tunneling
Process | 8 figures | null | 10.1140/epjc/s10052-022-09992-6 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we probe in 4D Einstein-Gauss-Bonnet black hole and its
thermodynamics. We illustrate the three asymptotically 4D EGB spacetime as an
asymptotically flat, de Sitter, and Anti-de Sitter. Also, we apply the
tunneling of the massless particles from the horizon of 4D EGB gravity and we
investigate the corr... | [
{
"created": "Fri, 16 Jul 2021 15:05:44 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2022 07:10:51 GMT",
"version": "v2"
}
] | 2022-04-19 | [
[
"Eslamzadeh",
"Sareh",
""
],
[
"Firouzjaee",
"Javad T.",
""
],
[
"Nozari",
"Kourosh",
""
]
] | In this paper, we probe in 4D Einstein-Gauss-Bonnet black hole and its thermodynamics. We illustrate the three asymptotically 4D EGB spacetime as an asymptotically flat, de Sitter, and Anti-de Sitter. Also, we apply the tunneling of the massless particles from the horizon of 4D EGB gravity and we investigate the correl... |
1803.02554 | Andreas Lymperis | Andreas Lymperis | Sudden Future Singularities and their observational signatures in
Modified Gravity | 9 pages, 8 figures, contribution to the School and Workshops on
Elementary Particle Physics and Gravity, 2-28 September 2017, Corfu, Greece | PoS CORFU2017 (2018) 088 | 10.22323/1.318.0088 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We verify the existence of Generalized Sudden Future Singularities (GSFS) in
quintessence models with scalar field potential of the form $V(\phi)\sim \vert
\phi\vert^n$ where $0<n<1$ and in the presence of a perfect fluid, both
numerically and analytically, using a proper generalized expansion ansatz for
the scale fa... | [
{
"created": "Wed, 7 Mar 2018 07:40:44 GMT",
"version": "v1"
}
] | 2018-12-07 | [
[
"Lymperis",
"Andreas",
""
]
] | We verify the existence of Generalized Sudden Future Singularities (GSFS) in quintessence models with scalar field potential of the form $V(\phi)\sim \vert \phi\vert^n$ where $0<n<1$ and in the presence of a perfect fluid, both numerically and analytically, using a proper generalized expansion ansatz for the scale fact... |
2203.00765 | S. M. M. Rasouli | S. M. M. Rasouli | Noncommutativity, Saez-Ballester theory and kinetic inflation | 11 pages, 7 figures | Universe 2022, 8, 165 | 10.3390/universe8030165 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a noncommutative (NC) version of an extended
S\'{a}ez-Ballester (SB) theory. Concretely, considering the spatially flat
Friedmann-Lema\^{\i}tre-Robertson-Walker~(FLRW) metric, we propose an
appropriate dynamical deformation between the conjugate momenta and applying
the Hamiltonian formalism, obta... | [
{
"created": "Tue, 1 Mar 2022 22:15:06 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2022 17:32:11 GMT",
"version": "v2"
}
] | 2022-03-25 | [
[
"Rasouli",
"S. M. M.",
""
]
] | This paper presents a noncommutative (NC) version of an extended S\'{a}ez-Ballester (SB) theory. Concretely, considering the spatially flat Friedmann-Lema\^{\i}tre-Robertson-Walker~(FLRW) metric, we propose an appropriate dynamical deformation between the conjugate momenta and applying the Hamiltonian formalism, obtain... |
2204.01907 | Shanzhong Han | Shanzhong Han | Weyl double copy and massless free fields in curved spacetimes | v3: trivial typos in eq.(3.91) have been corrected. Matches published
version in CQG | null | 10.1088/1361-6382/ac96c2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In spinor formalism, since any massless free-field spinor with spin higher
than $1/2$ can be constructed with spin-1/2 spinors (Dirac-Weyl spinors) and
scalars, we introduce a map between Weyl fields and Dirac-Weyl fields. We
determine the corresponding Dirac-Weyl spinors in a given empty spacetime.
Regarding them as... | [
{
"created": "Tue, 5 Apr 2022 00:33:31 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2022 10:19:03 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Oct 2022 18:43:10 GMT",
"version": "v3"
}
] | 2022-12-07 | [
[
"Han",
"Shanzhong",
""
]
] | In spinor formalism, since any massless free-field spinor with spin higher than $1/2$ can be constructed with spin-1/2 spinors (Dirac-Weyl spinors) and scalars, we introduce a map between Weyl fields and Dirac-Weyl fields. We determine the corresponding Dirac-Weyl spinors in a given empty spacetime. Regarding them as b... |
1101.5528 | Kentaro Somiya | Kentaro Somiya, Daniel Heinert, Alexey G. Gurkovsky, Stefan Hild,
Ronny Nawrodt, and Sergey P. Vyatchanin | Reduction of coating thermal noise by using an etalon | 12 pages, 7 figures | Phys.Lett.A375:1363-1374,2011 | 10.1016/j.physleta.2011.02.009 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Reduction of coating thermal noise is a key issue in precise measurements
with an optical interferometer. A good example of such a measurement device is
a gravitational-wave detector, where each mirror is coated by a few tens of
quarter-wavelength dielectric layers to achieve high reflectivity while the
thermal-noise... | [
{
"created": "Fri, 28 Jan 2011 12:36:26 GMT",
"version": "v1"
}
] | 2015-03-18 | [
[
"Somiya",
"Kentaro",
""
],
[
"Heinert",
"Daniel",
""
],
[
"Gurkovsky",
"Alexey G.",
""
],
[
"Hild",
"Stefan",
""
],
[
"Nawrodt",
"Ronny",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | Reduction of coating thermal noise is a key issue in precise measurements with an optical interferometer. A good example of such a measurement device is a gravitational-wave detector, where each mirror is coated by a few tens of quarter-wavelength dielectric layers to achieve high reflectivity while the thermal-noise l... |
1312.1162 | Behnam Pourhassan | M. Khurshudyan, B. Pourhassan, E.O. Kahya | Interacting two-component fluid models with varying EoS parameter | 11 page, accepted in Int. J. of Geometric Methods in Modern Physics | International Journal of Geometric Methods in Modern Physics 11
(2014) 1450061 | 10.1142/S0219887814500613 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider Universe filled with two-component fluid. We study
two different models. In the first model we assume barotropic fluid with the
linear equation of state as the first component of total fluid. In the second
model we assume Van der Waals gas as the first component of total fluid. In
both mode... | [
{
"created": "Mon, 2 Dec 2013 16:44:15 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2014 09:45:04 GMT",
"version": "v2"
}
] | 2014-05-01 | [
[
"Khurshudyan",
"M.",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Kahya",
"E. O.",
""
]
] | In this paper, we consider Universe filled with two-component fluid. We study two different models. In the first model we assume barotropic fluid with the linear equation of state as the first component of total fluid. In the second model we assume Van der Waals gas as the first component of total fluid. In both models... |
gr-qc/0409068 | Dan Vollick n | Dan N. Vollick | On the Dirac field in the Palatini form of 1/R gravity | 6 pages, LaTeX | Phys.Rev. D71 (2005) 044020 | 10.1103/PhysRevD.71.044020 | null | gr-qc astro-ph hep-th | null | In recent papers (astro-ph/0306630, gr-qc/0312041) I have argued that the
observed cosmological acceleration can be accounted for by the inclusion of a
1/R term in the gravitational action in the Palatini formalism. Subsequently,
Flanagan (astro-ph/0308111, gr-qc/0403063) argued that this theory is
equivalent to a sc... | [
{
"created": "Fri, 17 Sep 2004 22:04:03 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Vollick",
"Dan N.",
""
]
] | In recent papers (astro-ph/0306630, gr-qc/0312041) I have argued that the observed cosmological acceleration can be accounted for by the inclusion of a 1/R term in the gravitational action in the Palatini formalism. Subsequently, Flanagan (astro-ph/0308111, gr-qc/0403063) argued that this theory is equivalent to a scal... |
1512.08023 | Kimet Jusufi | Kimet Jusufi, Ali \"Ovg\"un | Tunneling of Massive Vector Particles From Rotating Charged Black
Strings | Accepted for publication in Astrophysics and Space Science | Astrophys Space Sci (2016) 361:207 | 10.1007/s10509-016-2802-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantum tunneling of charged massive vector bosons from a
charged static and a rotating black string. We apply the standard methods,
first we use the WKB approximation and the Hamilton-Jacobi equation, and then
we end up with a set of four linear equations. Finally, solving for the radial
part by using t... | [
{
"created": "Fri, 25 Dec 2015 18:13:31 GMT",
"version": "v1"
},
{
"created": "Thu, 26 May 2016 16:36:26 GMT",
"version": "v2"
}
] | 2016-06-07 | [
[
"Jusufi",
"Kimet",
""
],
[
"Övgün",
"Ali",
""
]
] | We study the quantum tunneling of charged massive vector bosons from a charged static and a rotating black string. We apply the standard methods, first we use the WKB approximation and the Hamilton-Jacobi equation, and then we end up with a set of four linear equations. Finally, solving for the radial part by using the... |
1806.09275 | Z. Yousaf | Z. Yousaf, M. Sharif, M. Ilyas, M. Z. Bhatti | Energy Conditions in Higher Derivative $f(R,\Box R,T)$ Gravity | 24 pages, 8 figures | Int. J. Geom. Meth. Mod. Phys. 15, 1850146 (2018) | 10.1142/S0219887818501463 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examined the viability bounds of a higher derivative
$f(R,\Box R, T)$ theory through analyzing energy conditions (where $R$ and $T$
are the Ricci scalar and trace of energy momentum tensor, respectively). We
take flat Friedmann-Lema\^{i}tre-Robertson-Walker spacetime coupled with ideal
configuration... | [
{
"created": "Mon, 25 Jun 2018 03:37:47 GMT",
"version": "v1"
}
] | 2018-06-26 | [
[
"Yousaf",
"Z.",
""
],
[
"Sharif",
"M.",
""
],
[
"Ilyas",
"M.",
""
],
[
"Bhatti",
"M. Z.",
""
]
] | In this paper, we examined the viability bounds of a higher derivative $f(R,\Box R, T)$ theory through analyzing energy conditions (where $R$ and $T$ are the Ricci scalar and trace of energy momentum tensor, respectively). We take flat Friedmann-Lema\^{i}tre-Robertson-Walker spacetime coupled with ideal configurations ... |
1104.3285 | Antoine Folacci | Yves D\'ecanini, Antoine Folacci and Bernard Raffaelli | Fine structure of high-energy absorption cross sections for black holes | v2: Minor corrections; v3: Minor changes to match the published
version | Class.Quant.Grav.28:175021,2011 | 10.1088/0264-9381/28/17/175021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The high-energy absorption cross section of the Schwarzschild black hole is
well approximated, in the eikonal regime, by the sum of two terms: the
geometrical cross section of the black hole photon sphere and the contribution
of a sinc function involving the geometrical characteristics (orbital period
and Lyapunov ex... | [
{
"created": "Sun, 17 Apr 2011 07:25:48 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2011 14:30:50 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Aug 2011 08:41:37 GMT",
"version": "v3"
}
] | 2011-08-25 | [
[
"Décanini",
"Yves",
""
],
[
"Folacci",
"Antoine",
""
],
[
"Raffaelli",
"Bernard",
""
]
] | The high-energy absorption cross section of the Schwarzschild black hole is well approximated, in the eikonal regime, by the sum of two terms: the geometrical cross section of the black hole photon sphere and the contribution of a sinc function involving the geometrical characteristics (orbital period and Lyapunov expo... |
gr-qc/9802050 | Miquel Dorca | Miquel Dorca (Enrico Fermi Institute, The University of Chicago) | Stress-energy tensor in the Bel-Szekeres space-time | 17 pages, LaTex file, 2 PostScript figures | Phys.Rev. D58 (1998) 104010 | 10.1103/PhysRevD.58.104010 | EFI-98-07 | gr-qc | null | In a recent work an approximation procedure was introduced to calculate the
vacuum expectation value of the stress-energy tensor for a conformal massless
scalar field in the classical background determined by a particular colliding
plane wave space-time. This approximation procedure consists in appropriately
modifyin... | [
{
"created": "Thu, 19 Feb 1998 13:10:58 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dorca",
"Miquel",
"",
"Enrico Fermi Institute, The University of Chicago"
]
] | In a recent work an approximation procedure was introduced to calculate the vacuum expectation value of the stress-energy tensor for a conformal massless scalar field in the classical background determined by a particular colliding plane wave space-time. This approximation procedure consists in appropriately modifying ... |
1008.4997 | Latham Boyle | Latham Boyle (Perimeter Institute) | The general theory of porcupines, perfect and imperfect | v1: 4 pages, no figures; v2: minor change - helpful sentence added
after Eq.(31) | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Porcupines are networks of gravitational wave detectors in which the
detectors and the distances between them are short relative to the
gravitational wavelengths of interest. Perfect porcupines are special
configurations whose sensitivity to a gravitational plane wave is independent
of the propagation direction or po... | [
{
"created": "Mon, 30 Aug 2010 04:12:51 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Sep 2010 14:16:41 GMT",
"version": "v2"
}
] | 2010-09-08 | [
[
"Boyle",
"Latham",
"",
"Perimeter Institute"
]
] | Porcupines are networks of gravitational wave detectors in which the detectors and the distances between them are short relative to the gravitational wavelengths of interest. Perfect porcupines are special configurations whose sensitivity to a gravitational plane wave is independent of the propagation direction or pola... |
2303.15793 | Ioannis Soranidis | Pravin K. Dahal, Fil Simovic, Ioannis Soranidis, and Daniel R. Terno | Black holes as spherically-symmetric horizon-bound objects | 15 pages, 1 figure. Comments welcome! | Phys. Rev. D 108,104014 (2023) | 10.1103/PhysRevD.108.104014 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Working in a semi-classical setting, we consider solutions of the Einstein
equations that exhibit light trapping in finite time according to distant
observers. In spherical symmetry, we construct near-horizon quantities from the
assumption of regularity of the renormalized expectation value of the
energy-momentum ten... | [
{
"created": "Tue, 28 Mar 2023 07:58:40 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Nov 2023 22:10:23 GMT",
"version": "v2"
}
] | 2023-11-14 | [
[
"Dahal",
"Pravin K.",
""
],
[
"Simovic",
"Fil",
""
],
[
"Soranidis",
"Ioannis",
""
],
[
"Terno",
"Daniel R.",
""
]
] | Working in a semi-classical setting, we consider solutions of the Einstein equations that exhibit light trapping in finite time according to distant observers. In spherical symmetry, we construct near-horizon quantities from the assumption of regularity of the renormalized expectation value of the energy-momentum tenso... |
2005.04140 | Christoph Dreissigacker | Christoph Dreissigacker and Reinhard Prix | Deep-Learning Continuous Gravitational Waves: Multiple detectors and
realistic noise | (12 pages,8 figures, 6 tables) | Phys. Rev. D 102, 022005 (2020) | 10.1103/PhysRevD.102.022005 | null | gr-qc astro-ph.IM physics.data-an | http://creativecommons.org/licenses/by/4.0/ | The sensitivity of wide-parameter-space searches for continuous gravitational
waves is limited by computational cost. Recently it was shown that Deep Neural
Networks (DNNs) can perform all-sky searches directly on (single-detector)
strain data, potentially providing a low-computing-cost search method that
could lead ... | [
{
"created": "Fri, 8 May 2020 16:37:01 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Jul 2020 10:06:50 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Dreissigacker",
"Christoph",
""
],
[
"Prix",
"Reinhard",
""
]
] | The sensitivity of wide-parameter-space searches for continuous gravitational waves is limited by computational cost. Recently it was shown that Deep Neural Networks (DNNs) can perform all-sky searches directly on (single-detector) strain data, potentially providing a low-computing-cost search method that could lead to... |
gr-qc/9502029 | Javier Muniain | Javier P. Muniain, Dardo Piriz (UC Riverside) | Critical Behavior of Dimensionally Continued Black Holes | 21 pages in Latex format, no figures, vastly improved version to
appear in Phys. Rev. D | Phys.Rev. D53 (1996) 816-823 | 10.1103/PhysRevD.53.816 | null | gr-qc | null | The critical behavior of black holes in even and odd dimensional spacetimes
is studied based on Ba\~nados-Teitelboim-Zanelli (BTZ) dimensionally continued
black holes. In even dimensions it is found that asymptotically flat and anti
de-Sitter Reissner-Nordstr\"om black holes present up to two second order phase
trans... | [
{
"created": "Sun, 12 Feb 1995 03:30:16 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Nov 1995 00:55:28 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Muniain",
"Javier P.",
"",
"UC Riverside"
],
[
"Piriz",
"Dardo",
"",
"UC Riverside"
]
] | The critical behavior of black holes in even and odd dimensional spacetimes is studied based on Ba\~nados-Teitelboim-Zanelli (BTZ) dimensionally continued black holes. In even dimensions it is found that asymptotically flat and anti de-Sitter Reissner-Nordstr\"om black holes present up to two second order phase transit... |
1612.04506 | Clement Delcamp | Clement Delcamp, Bianca Dittrich | Towards a phase diagram for spin foams | 37+11 pages | null | 10.1088/1361-6382/aa8f24 | null | gr-qc cond-mat.str-el hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the most pressing issues for loop quantum gravity and spin foams is
the construction of the continuum limit. In this paper, we propose a systematic
coarse-graining scheme for three-dimensional lattice gauge models including
spin foams. This scheme is based on the concept of decorated tensor networks,
which hav... | [
{
"created": "Wed, 14 Dec 2016 06:24:03 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"Delcamp",
"Clement",
""
],
[
"Dittrich",
"Bianca",
""
]
] | One of the most pressing issues for loop quantum gravity and spin foams is the construction of the continuum limit. In this paper, we propose a systematic coarse-graining scheme for three-dimensional lattice gauge models including spin foams. This scheme is based on the concept of decorated tensor networks, which have ... |
gr-qc/0006069 | Milan Stefanik | Milan Stefanik, Jan Horsky | Generating Conjecture and Some Einstein-Maxwell Field of High Symmetry | 3 pages, LaTeX | Czech. J. Phys. 48 (1998) 113-116 | 10.1023/A:1021200632475 | null | gr-qc | null | For stationary cylindrically symmetric solutions of the Einstein-Maxwell
equation we have shown that the "charged" solutions of McCrea, Chitre et
al.(CGN), Van den Bergh and Wils (VW) can be obtained from the seed metrics
using generating conjecture. The McCrea "charged" solution has as a seed vacuum
metric the Van S... | [
{
"created": "Tue, 20 Jun 2000 08:37:33 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Stefanik",
"Milan",
""
],
[
"Horsky",
"Jan",
""
]
] | For stationary cylindrically symmetric solutions of the Einstein-Maxwell equation we have shown that the "charged" solutions of McCrea, Chitre et al.(CGN), Van den Bergh and Wils (VW) can be obtained from the seed metrics using generating conjecture. The McCrea "charged" solution has as a seed vacuum metric the Van Sto... |
1801.04657 | M. Ghasemi-Nodehi | M. Ghasemi-Nodehi | Testing exterior spacetime of the neutron star via X-ray reflection
spectroscopy | v2: corrected some typos | Phys.Rev. D97 (2018) no.2, 024043 | 10.1103/PhysRevD.97.024043 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exterior geometry of a neutron star can be approximated by relativistic
multipole moments of a parametrized metric using Ernst potential formalism.
This spacetime can be tested with electromagnetic wave observation of
astrophysical black holes. In the present paper, I simulate X-ray reflection
spectra of a thin a... | [
{
"created": "Mon, 15 Jan 2018 03:39:40 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2018 03:19:05 GMT",
"version": "v2"
}
] | 2018-02-06 | [
[
"Ghasemi-Nodehi",
"M.",
""
]
] | The exterior geometry of a neutron star can be approximated by relativistic multipole moments of a parametrized metric using Ernst potential formalism. This spacetime can be tested with electromagnetic wave observation of astrophysical black holes. In the present paper, I simulate X-ray reflection spectra of a thin acc... |
gr-qc/0302039 | Martin Servin | Martin Servin and Gert Brodin | Resonant interaction between gravitational waves, electromagnetic waves
and plasma flows | 12 pages, 1 figure, typos corrected and numerical example added | Phys.Rev. D68 (2003) 044017 | 10.1103/PhysRevD.68.044017 | null | gr-qc astro-ph physics.plasm-ph | null | In magnetized plasmas gravitational and electromagnetic waves may interact
coherently and exchange energy between themselves and with plasma flows. We
derive the wave interaction equations for these processes in the case of waves
propagating perpendicular or parallel to the plasma background magnetic field.
In the la... | [
{
"created": "Tue, 11 Feb 2003 10:46:47 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Aug 2003 08:26:27 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Servin",
"Martin",
""
],
[
"Brodin",
"Gert",
""
]
] | In magnetized plasmas gravitational and electromagnetic waves may interact coherently and exchange energy between themselves and with plasma flows. We derive the wave interaction equations for these processes in the case of waves propagating perpendicular or parallel to the plasma background magnetic field. In the latt... |
gr-qc/0007042 | Koji Uryu | Koji Uryu (SISSA), Masaru Shibata (UIUC), and Yoshiharu Eriguchi
(U.Tokyo) | Properties of general relativistic, irrotational binary neutron stars in
close quasiequilibrium orbits : Polytropic equations of state | 20 pages, 20 figures, with minor revisions for footnote [41]. To
appear in PRD | Phys.Rev. D62 (2000) 104015 | 10.1103/PhysRevD.62.104015 | null | gr-qc astro-ph | null | We investigate close binary neutron stars in quasiequilibrium states in a
general relativistic framework. We assume conformal flatness for the spatial
metric and irrotational velocity field for the neutron stars. We adopt the
polytropic equation of state. The computation is performed for the polytropic
index n(=0.5, ... | [
{
"created": "Tue, 18 Jul 2000 14:16:19 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Aug 2000 13:08:57 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Aug 2000 13:25:30 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Uryu",
"Koji",
"",
"SISSA"
],
[
"Shibata",
"Masaru",
"",
"UIUC"
],
[
"Eriguchi",
"Yoshiharu",
"",
"U.Tokyo"
]
] | We investigate close binary neutron stars in quasiequilibrium states in a general relativistic framework. We assume conformal flatness for the spatial metric and irrotational velocity field for the neutron stars. We adopt the polytropic equation of state. The computation is performed for the polytropic index n(=0.5, 0.... |
gr-qc/0610069 | George Sparling | George A.J. Sparling | Esquisse d'une synthese | 19 pages; everything, philosophy and synthesis | null | null | null | gr-qc | null | Since antiquity, from Euclid of Alexandria to Galileo Galilei to Immanuel
Kant to Hermann Minkowksi to Albert Einstein, the question of the nature of
space and time has occupied scientists and philosophers. In the
four-dimensional space-time of Einstein's wonderful theory of gravity, the
squared interval, in units su... | [
{
"created": "Fri, 13 Oct 2006 03:44:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sparling",
"George A. J.",
""
]
] | Since antiquity, from Euclid of Alexandria to Galileo Galilei to Immanuel Kant to Hermann Minkowksi to Albert Einstein, the question of the nature of space and time has occupied scientists and philosophers. In the four-dimensional space-time of Einstein's wonderful theory of gravity, the squared interval, in units such... |
gr-qc/0603116 | Timothy Clifton | T. Clifton and John D. Barrow | Decaying Gravity | 13 pages | Phys.Rev.D73:104022,2006 | 10.1103/PhysRevD.73.104022 | null | gr-qc astro-ph hep-ph | null | We consider the possibility of energy being exchanged between the scalar and
matter fields in scalar-tensor theories of gravity. Such an exchange provides a
new mechanism which can drive variations in the gravitational 'constant' G. We
find exact solutions for the evolution of spatially flat
Friedman-Roberston-Walker... | [
{
"created": "Wed, 29 Mar 2006 16:39:16 GMT",
"version": "v1"
},
{
"created": "Thu, 18 May 2006 09:13:49 GMT",
"version": "v2"
}
] | 2009-01-14 | [
[
"Clifton",
"T.",
""
],
[
"Barrow",
"John D.",
""
]
] | We consider the possibility of energy being exchanged between the scalar and matter fields in scalar-tensor theories of gravity. Such an exchange provides a new mechanism which can drive variations in the gravitational 'constant' G. We find exact solutions for the evolution of spatially flat Friedman-Roberston-Walker c... |
gr-qc/9708015 | Franz Embacher | Franz Embacher | The old frequency decomposition problem in the light of new quantization
methods | 5 pages, LaTeX (no figures), Talk given at the Eighth Marcel
Grossmann meeting, Jerusalem, June 22--27, 1997 | null | null | UWThPh-1997-21 | gr-qc | null | The question is raised whether the unique decomposition of the physical
Hilbert space, as emerging in the refined algebraic quantization of a
constrained system, may be understood in terms of the old Klein-Gordon type
quantization.
| [
{
"created": "Thu, 7 Aug 1997 18:36:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Embacher",
"Franz",
""
]
] | The question is raised whether the unique decomposition of the physical Hilbert space, as emerging in the refined algebraic quantization of a constrained system, may be understood in terms of the old Klein-Gordon type quantization. |
1211.7095 | Jeffrey Emberson | Kipp Cannon, J. D. Emberson, Chad Hanna, Drew Keppel, Harald Pfeiffer | Interpolation in waveform space: enhancing the accuracy of gravitational
waveform families using numerical relativity | 10 pages, 7 figures | null | 10.1103/PhysRevD.87.044008 | LIGO-P1200138 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Matched-filtering for the identification of compact object mergers in
gravitational-wave antenna data involves the comparison of the data stream to a
bank of template gravitational waveforms. Typically the template bank is
constructed from phenomenological waveform models since these can be evaluated
for an arbitrary... | [
{
"created": "Thu, 29 Nov 2012 21:26:15 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Cannon",
"Kipp",
""
],
[
"Emberson",
"J. D.",
""
],
[
"Hanna",
"Chad",
""
],
[
"Keppel",
"Drew",
""
],
[
"Pfeiffer",
"Harald",
""
]
] | Matched-filtering for the identification of compact object mergers in gravitational-wave antenna data involves the comparison of the data stream to a bank of template gravitational waveforms. Typically the template bank is constructed from phenomenological waveform models since these can be evaluated for an arbitrary c... |
gr-qc/9803045 | Renaud Parentani | R. Parentani | The Background Field Approximation in (quantum) cosmology | 26 pages, latex, no figures | Class.Quant.Grav. 17 (2000) 1527-1547 | 10.1088/0264-9381/17/6/314 | null | gr-qc | null | We analyze the Hamilton-Jacobi action of gravity and matter in the limit
where gravity is treated at the background field approximation. The motivation
is to clarify when and how the solutions of the Wheeler-DeWitt equation lead to
the Schr\"odinger equation in a given background. To this end, we determine
when and h... | [
{
"created": "Thu, 12 Mar 1998 17:32:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Parentani",
"R.",
""
]
] | We analyze the Hamilton-Jacobi action of gravity and matter in the limit where gravity is treated at the background field approximation. The motivation is to clarify when and how the solutions of the Wheeler-DeWitt equation lead to the Schr\"odinger equation in a given background. To this end, we determine when and how... |
2304.03142 | Chantal Pitte | Chantal Pitte and Quentin Baghi and Sylvain Marsat and Marc
Besan\c{c}on and Antoine Petiteau | On the detectability of higher harmonics with LISA | 20 pages, 13 figures, submitted to PRD | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Supermassive black hole binaries (SMBHBs) are expected to be detected by the
future space-based gravitational-wave detector LISA with a large
signal-to-noise ratio (SNR). This prospect enhances the possibility of
differentiating higher harmonics in the inspiral-merger-ringdown (IMR)
waveform. In this study, we test t... | [
{
"created": "Thu, 6 Apr 2023 15:24:58 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jul 2023 13:04:05 GMT",
"version": "v2"
}
] | 2023-07-04 | [
[
"Pitte",
"Chantal",
""
],
[
"Baghi",
"Quentin",
""
],
[
"Marsat",
"Sylvain",
""
],
[
"Besançon",
"Marc",
""
],
[
"Petiteau",
"Antoine",
""
]
] | Supermassive black hole binaries (SMBHBs) are expected to be detected by the future space-based gravitational-wave detector LISA with a large signal-to-noise ratio (SNR). This prospect enhances the possibility of differentiating higher harmonics in the inspiral-merger-ringdown (IMR) waveform. In this study, we test the... |
1702.01849 | Kazufumi Takahashi | Kazufumi Takahashi, Hayato Motohashi, Teruaki Suyama, Tsutomu
Kobayashi | General invertible transformation and physical degrees of freedom | 14 pages; matches published version | Phys. Rev. D 95, 084053 (2017) | 10.1103/PhysRevD.95.084053 | RESCEU-1/17, RUP-17-2 | gr-qc astro-ph.CO hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An invertible field transformation is such that the old field variables
correspond one-to-one to the new variables. As such, one may think that two
systems that are related by an invertible transformation are physically
equivalent. However, if the transformation depends on field derivatives, the
equivalence between t... | [
{
"created": "Tue, 7 Feb 2017 02:16:31 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 2017 02:02:02 GMT",
"version": "v2"
}
] | 2017-05-01 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Suyama",
"Teruaki",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | An invertible field transformation is such that the old field variables correspond one-to-one to the new variables. As such, one may think that two systems that are related by an invertible transformation are physically equivalent. However, if the transformation depends on field derivatives, the equivalence between the... |
2308.16627 | Maryam Haditale | Maryam Haditale and Behrooz Malekolkalami | Thermodynamic Properties of Regular Phantom Black Hole | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Regular Phantom Black Holes (RPBH)s are of theoretical and observational
importance, and some properties have been studied. In this work, we study some
of the thermodynamical properties such as entropy, and temperature, ... in
three asymptotically spacetimes: flat, de--Sitter (dS), and Anti-de Sitter
(AdS). Many ... | [
{
"created": "Thu, 31 Aug 2023 10:49:19 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Sep 2023 05:45:02 GMT",
"version": "v2"
}
] | 2023-09-06 | [
[
"Haditale",
"Maryam",
""
],
[
"Malekolkalami",
"Behrooz",
""
]
] | The Regular Phantom Black Holes (RPBH)s are of theoretical and observational importance, and some properties have been studied. In this work, we study some of the thermodynamical properties such as entropy, and temperature, ... in three asymptotically spacetimes: flat, de--Sitter (dS), and Anti-de Sitter (AdS). Many of... |
2210.09259 | Anna Puecher | Anna Puecher, Tim Dietrich, Ka Wa Tsang, Chinmay Kalaghatgi, Soumen
Roy, Yoshinta Setyawati, Chris Van Den Broeck | Unraveling information about supranuclear-dense matter from the complete
binary neutron star coalescence process using future gravitational-wave
detector networks | Published version | null | 10.1103/PhysRevD.107.124009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves provide us with an extraordinary tool to study the matter
inside neutron stars. In particular, the postmerger signal probes an extreme
temperature and density regime and will help reveal information about the
equation of state of supranuclear-dense matter. Although current detectors are
most sensi... | [
{
"created": "Mon, 17 Oct 2022 17:03:19 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jun 2023 12:41:03 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"Puecher",
"Anna",
""
],
[
"Dietrich",
"Tim",
""
],
[
"Tsang",
"Ka Wa",
""
],
[
"Kalaghatgi",
"Chinmay",
""
],
[
"Roy",
"Soumen",
""
],
[
"Setyawati",
"Yoshinta",
""
],
[
"Broeck",
"Chris Van Den",
""
]
] | Gravitational waves provide us with an extraordinary tool to study the matter inside neutron stars. In particular, the postmerger signal probes an extreme temperature and density regime and will help reveal information about the equation of state of supranuclear-dense matter. Although current detectors are most sensiti... |
1808.05825 | Andrea Geralico | Donato Bini, Andrea Geralico | Scattering by a Schwarzschild black hole of particles undergoing drag
force effects | 13 pages, 2 figures; published version | Gen. Relativ. Gravit. 48, 101 (2016) | 10.1007/s10714-016-2094-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scattering of massive particles by a Schwarzschild black hole also
undergoing a drag force is considered. The latter is modeled as a viscous force
acting on the orbital plane, with components proportional to the associated
particle 4-velocity components. The energy and angular momentum losses as well
as the depen... | [
{
"created": "Fri, 17 Aug 2018 11:00:59 GMT",
"version": "v1"
}
] | 2018-08-20 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | The scattering of massive particles by a Schwarzschild black hole also undergoing a drag force is considered. The latter is modeled as a viscous force acting on the orbital plane, with components proportional to the associated particle 4-velocity components. The energy and angular momentum losses as well as the depende... |
1407.3768 | Karim Noui | Jibril Ben Achour, Julien Grain, Karim Noui | Loop Quantum Cosmology with Complex Ashtekar Variables | 22 pages | null | 10.1088/0264-9381/32/2/025011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and study Loop Quantum Cosmology (LQC) when the Barbero-Immirzi
parameter takes the complex value $\gamma=\pm i$. We refer to this new quantum
cosmology as complex Loop Quantum Cosmology. We proceed in making an analytic
continuation of the Hamiltonian constraint (with no inverse volume corrections)
from... | [
{
"created": "Mon, 14 Jul 2014 18:59:44 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Grain",
"Julien",
""
],
[
"Noui",
"Karim",
""
]
] | We construct and study Loop Quantum Cosmology (LQC) when the Barbero-Immirzi parameter takes the complex value $\gamma=\pm i$. We refer to this new quantum cosmology as complex Loop Quantum Cosmology. We proceed in making an analytic continuation of the Hamiltonian constraint (with no inverse volume corrections) from r... |
1608.03806 | Adam Levi | Adam Levi and Amos Ori | Versatile method for renormalized stress-energy computation in
black-hole spacetimes | 5 pages, 3 figures. V2: Added two important references (Refs. [18]
and [19]), which already showed ANEC violations previously, although for
different fields. Title was consequently changed, and also various
modifications were made in the text. Overall, the paper's content is
unchanged. V3: Typo corrected. V4: U... | Phys. Rev. Lett. 117, 231101 (2016) | 10.1103/PhysRevLett.117.231101 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report here on a new method for calculating the renormalized stress-energy
tensor (RSET) in black-hole (BH) spacetimes, which should also be applicable to
dynamical BHs and to spinning BHs. This new method only requires the spacetime
to admit a single symmetry. So far we developed three variants of the method,
aim... | [
{
"created": "Fri, 12 Aug 2016 14:26:11 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Aug 2016 07:36:59 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Aug 2016 08:17:24 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Nov 2016 13:40:43 GMT",
"version": "v4"
}
] | 2016-12-02 | [
[
"Levi",
"Adam",
""
],
[
"Ori",
"Amos",
""
]
] | We report here on a new method for calculating the renormalized stress-energy tensor (RSET) in black-hole (BH) spacetimes, which should also be applicable to dynamical BHs and to spinning BHs. This new method only requires the spacetime to admit a single symmetry. So far we developed three variants of the method, aimed... |
0805.4500 | Norbert Straumann | Norbert Straumann | Proof of a decomposition theorem for symmetric tensors on spaces with
constant curvature | 4 pages, accepted for publication in Annalen der Physik | Annalen Phys.17:609-611,1997 | 10.1002/andp.200810312 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In cosmological perturbation theory a first major step consists in the
decomposition of the various perturbation amplitudes into scalar, vector and
tensor perturbations, which mutually decouple. In performing this decomposition
one uses -- beside the Hodge decomposition for one-forms -- an analogous
decomposition of ... | [
{
"created": "Thu, 29 May 2008 10:02:51 GMT",
"version": "v1"
}
] | 2008-12-19 | [
[
"Straumann",
"Norbert",
""
]
] | In cosmological perturbation theory a first major step consists in the decomposition of the various perturbation amplitudes into scalar, vector and tensor perturbations, which mutually decouple. In performing this decomposition one uses -- beside the Hodge decomposition for one-forms -- an analogous decomposition of sy... |
1503.00978 | Isabel Cordero-Carri\'on | Jos\'e-Mar\'ia Ib\'a\~nez, Isabel Cordero-Carri\'on, Miguel-\'Angel
Aloy, Jos\'e-Mar\'ia Mart\'i and Juan-Antonio Miralles | On the convexity of Relativistic Ideal Magnetohydrodynamics | 14 pages. Submitted to Classical and Quantum Gravity | null | 10.1088/0264-9381/32/9/095007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the influence of the magnetic field in the convexity properties of
the relativistic magnetohydrodynamics system of equations. To this purpose we
use the approach of Lax, based on the analysis of the linearly
degenerate/genuinely non-linear nature of the characteristic fields. Degenerate
and non-degenerate ... | [
{
"created": "Tue, 3 Mar 2015 15:40:19 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Ibáñez",
"José-María",
""
],
[
"Cordero-Carrión",
"Isabel",
""
],
[
"Aloy",
"Miguel-Ángel",
""
],
[
"Martí",
"José-María",
""
],
[
"Miralles",
"Juan-Antonio",
""
]
] | We analyze the influence of the magnetic field in the convexity properties of the relativistic magnetohydrodynamics system of equations. To this purpose we use the approach of Lax, based on the analysis of the linearly degenerate/genuinely non-linear nature of the characteristic fields. Degenerate and non-degenerate st... |
2108.04273 | Adam Pound | Vahid Toomani, Peter Zimmerman, Andrew Spiers, Stefan Hollands, Adam
Pound, Stephen R. Green | New metric reconstruction scheme for gravitational self-force
calculations | 73 pages in CQG format, 2 figures. v2 has an expanded introduction | Class. Quantum Grav. 39, 015019 (2022) | 10.1088/1361-6382/ac37a5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspirals of stellar-mass objects into massive black holes will be important
sources for the space-based gravitational-wave detector LISA. Modelling these
systems requires calculating the metric perturbation due to a point particle
orbiting a Kerr black hole. Currently, the linear perturbation is obtained with
a metr... | [
{
"created": "Mon, 9 Aug 2021 18:06:59 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Dec 2021 21:49:48 GMT",
"version": "v2"
}
] | 2022-01-03 | [
[
"Toomani",
"Vahid",
""
],
[
"Zimmerman",
"Peter",
""
],
[
"Spiers",
"Andrew",
""
],
[
"Hollands",
"Stefan",
""
],
[
"Pound",
"Adam",
""
],
[
"Green",
"Stephen R.",
""
]
] | Inspirals of stellar-mass objects into massive black holes will be important sources for the space-based gravitational-wave detector LISA. Modelling these systems requires calculating the metric perturbation due to a point particle orbiting a Kerr black hole. Currently, the linear perturbation is obtained with a metric... |
2008.09205 | Reinoud Slagter | Reinoud Jan Slagter | On the Azimuthal Alignment of Quasars Spin Vector in Large Quasar Groups
and Cosmic Strings | Final version 8 figures. Accepted for MNRAS | null | 10.1093/mnras/staa3840 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We find evidence of the alignment of the azimuthal angle of the spin vectors
of quasars in large quasar groups of different redshift. This effect is
probably of cosmological origin and could be explained by symmetry breaking of
the scalar-gauge field of cosmic strings in the early universe. It is expected
that this e... | [
{
"created": "Thu, 20 Aug 2020 20:43:56 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Aug 2020 21:23:39 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Aug 2020 13:38:00 GMT",
"version": "v3"
},
{
"created": "Sat, 12 Dec 2020 10:00:08 GMT",
"version": "v4"
}
] | 2020-12-23 | [
[
"Slagter",
"Reinoud Jan",
""
]
] | We find evidence of the alignment of the azimuthal angle of the spin vectors of quasars in large quasar groups of different redshift. This effect is probably of cosmological origin and could be explained by symmetry breaking of the scalar-gauge field of cosmic strings in the early universe. It is expected that this eff... |
1905.09089 | Soumendra Kishore Roy | Soumendra Kishore Roy, Ratna Koley and Parthasarathi Majumdar | Kinematics of Two-particle Scattering in Black Hole Backgrounds | 7 pages | Phys. Rev. D 100, 064052 (2019) | 10.1103/PhysRevD.100.064052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that particle scattering in general curved backgrounds entails {\it
six} independent, kinematical Mandelstam-like invariants, instead of the two in
flat spacetime. Spacetime isometries are shown to lead to constraints between
these parameters, so that for standard black holes like Schwarzschild,
Reissner-Nord... | [
{
"created": "Wed, 22 May 2019 12:01:44 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2019 11:55:24 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Sep 2019 12:36:49 GMT",
"version": "v3"
}
] | 2019-09-27 | [
[
"Roy",
"Soumendra Kishore",
""
],
[
"Koley",
"Ratna",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | We show that particle scattering in general curved backgrounds entails {\it six} independent, kinematical Mandelstam-like invariants, instead of the two in flat spacetime. Spacetime isometries are shown to lead to constraints between these parameters, so that for standard black holes like Schwarzschild, Reissner-Nordst... |
1205.0881 | Michael Good | Michael R. R. Good | On Spin-Statistics and Bogoliubov Transformations in Flat Spacetime With
Acceleration Conditions | 13 pages, 5 figures | International Journal of Modern Physics A. Vol. 28, No. 2 (2013)
1350008 (13 pages) | 10.1142/S0217751X13500085 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A single real scalar field of spin zero obeying the Klein-Gordon equation in
flat space-time under external conditions is considered in the context of the
spin-statistics connection. An imposed accelerated boundary on the field is
made to become, in the far future, (1) asymptotically inertial and (2)
asymptotically n... | [
{
"created": "Fri, 4 May 2012 08:43:50 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2013 06:32:08 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Good",
"Michael R. R.",
""
]
] | A single real scalar field of spin zero obeying the Klein-Gordon equation in flat space-time under external conditions is considered in the context of the spin-statistics connection. An imposed accelerated boundary on the field is made to become, in the far future, (1) asymptotically inertial and (2) asymptotically non... |
2108.11788 | Meir Shimon | Meir Shimon | Locally Scale-Invariant Gravity | 20 pages, title changed, broadened scope, significantly modified | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We put forward the idea that in addition to diffeomorphism invariance of
general relativity (GR) the gravitational interaction is invariant under
arbitrary scale-deformations of the metric field. In addition, we assume that
the scaling field has an internal symmetry. The global charges that are
associated with this s... | [
{
"created": "Wed, 25 Aug 2021 16:23:30 GMT",
"version": "v1"
},
{
"created": "Wed, 18 May 2022 13:48:58 GMT",
"version": "v2"
}
] | 2022-05-19 | [
[
"Shimon",
"Meir",
""
]
] | We put forward the idea that in addition to diffeomorphism invariance of general relativity (GR) the gravitational interaction is invariant under arbitrary scale-deformations of the metric field. In addition, we assume that the scaling field has an internal symmetry. The global charges that are associated with this sym... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.