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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9602025 | Jaume Garriga | Jaume Garriga | Bubble fluctuations in $\Omega<1$ inflation | 17 pages, 3 figs, LaTeX, epsfig.sty, available at
ftp://ftp.ifae.es/preprint/ft/uabft387.ps | Phys.Rev. D54 (1996) 4764-4769 | 10.1103/PhysRevD.54.4764 | UAB-FT-387 | gr-qc astro-ph | null | In the context of the open inflationary universe, we calculate the amplitude
of quantum fluctuations which deform the bubble shape. These give rise to
scalar field fluctuations in the open Friedman-Robertson-Walker universe which
is contained inside the bubble. One can transform to a new gauge in which
matter looks p... | [
{
"created": "Mon, 13 Feb 1995 11:56:35 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Garriga",
"Jaume",
""
]
] | In the context of the open inflationary universe, we calculate the amplitude of quantum fluctuations which deform the bubble shape. These give rise to scalar field fluctuations in the open Friedman-Robertson-Walker universe which is contained inside the bubble. One can transform to a new gauge in which matter looks per... |
1408.4203 | Richard Barry | Richard A. Barry and Susan M. Scott | The Strongly Attached Point Topology of the Abstract Boundary For
Space-Time | 48 pages, 11 figures | Class. Quantum Grav. 31(12) 125004 2014 | 10.1088/0264-9381/31/12/125004 | null | gr-qc math.GN | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The abstract boundary construction of Scott and Szekeres provides a
`boundary' for any n-dimensional, paracompact, connected, Hausdorff, smooth
manifold. Singularities may then be defined as objects within this boundary. In
a previous paper by the authors, a topology referred to as the attached point
topology was def... | [
{
"created": "Tue, 19 Aug 2014 03:50:46 GMT",
"version": "v1"
}
] | 2014-08-20 | [
[
"Barry",
"Richard A.",
""
],
[
"Scott",
"Susan M.",
""
]
] | The abstract boundary construction of Scott and Szekeres provides a `boundary' for any n-dimensional, paracompact, connected, Hausdorff, smooth manifold. Singularities may then be defined as objects within this boundary. In a previous paper by the authors, a topology referred to as the attached point topology was defin... |
0909.4039 | Gaurav Khanna | Gaurav Khanna, Justin McKennon | An exploration of CUDA and CBEA for a gravitational wave
source-modelling application | 8 pages, 4 figures, Accepted for publication in Parallel and
Distributed Computing and Systems (PDCS 2009) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we accelerate a gravitational physics numerical modelling
application using hardware accelerators -- Cell processor and Tesla CUDA GPU.
We describe these new technologies and our approach in detail, and then present
our final performance results. We obtain well over an order-of-magnitude
performance ga... | [
{
"created": "Tue, 22 Sep 2009 16:55:59 GMT",
"version": "v1"
}
] | 2009-09-23 | [
[
"Khanna",
"Gaurav",
""
],
[
"McKennon",
"Justin",
""
]
] | In this paper, we accelerate a gravitational physics numerical modelling application using hardware accelerators -- Cell processor and Tesla CUDA GPU. We describe these new technologies and our approach in detail, and then present our final performance results. We obtain well over an order-of-magnitude performance gain... |
1503.08751 | Mairi Sakellariadou | Gaetano Lambiase, Mairi Sakellariadou, Antonio Stabile, Arturo Stabile | Astrophysical constraints on extended gravity models | 22 pages; minor changes to match published version | JCAP 07 (2015) 003 | 10.1088/1475-7516/2015/07/003 | KCL-PH-TH/2015-16 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the propagation of gravitational waves in the context of
fourth order gravity nonminimally coupled to a massive scalar field. Using the
damping of the orbital period of coalescing stellar binary systems, we impose
constraints on the free parameters of extended gravity models. In particular,
we find tha... | [
{
"created": "Mon, 30 Mar 2015 17:24:58 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2015 17:01:26 GMT",
"version": "v2"
}
] | 2015-07-10 | [
[
"Lambiase",
"Gaetano",
""
],
[
"Sakellariadou",
"Mairi",
""
],
[
"Stabile",
"Antonio",
""
],
[
"Stabile",
"Arturo",
""
]
] | We investigate the propagation of gravitational waves in the context of fourth order gravity nonminimally coupled to a massive scalar field. Using the damping of the orbital period of coalescing stellar binary systems, we impose constraints on the free parameters of extended gravity models. In particular, we find that ... |
1602.08583 | Winfried Zimdahl | Eddy G.Chirinos Isidro, Cristofher Zu\~niga Vargas, Winfried Zimdahl | Simple inhomogeneous cosmological (toy) models | 30 pages, 14 figures, comments and references added, accepted for
publication in JCAP | null | 10.1088/1475-7516/2016/05/003 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Lema\^itre-Tolman-Bondi (LTB) metric we consider two flat
inhomogeneous big-bang models. We aim at clarifying, as far as possible
analytically, basic features of the dynamics of the simplest inhomogeneous
models and to point out the potential usefulness of exact inhomogeneous
solutions as generalizations... | [
{
"created": "Sat, 27 Feb 2016 11:04:18 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2016 01:21:24 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Isidro",
"Eddy G. Chirinos",
""
],
[
"Vargas",
"Cristofher Zuñiga",
""
],
[
"Zimdahl",
"Winfried",
""
]
] | Based on the Lema\^itre-Tolman-Bondi (LTB) metric we consider two flat inhomogeneous big-bang models. We aim at clarifying, as far as possible analytically, basic features of the dynamics of the simplest inhomogeneous models and to point out the potential usefulness of exact inhomogeneous solutions as generalizations o... |
2104.08024 | Alkiviadis Triantafyllopoulos | Spyros Konitopoulos, Emmanuel N. Saridakis, P. C. Stavrinos and A.
Triantafyllopoulos | Dark Gravitational Sectors on a Generalized Scalar-Tensor Vector Bundle
Model and Cosmological Applications | 17 pages, 2 figures, version to appear in Phys.Rev.D | Phys. Rev. D 104, 064018 (2021) | 10.1103/PhysRevD.104.064018 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present the foundations of generalized scalar-tensor theories
arising from vector bundle constructions, and we study the kinematic, dynamical
and cosmological consequences. In particular, over a pseudo-Riemannian
space-time base manifold, we define a fiber structure with two scalar fields.
The resulti... | [
{
"created": "Fri, 16 Apr 2021 10:37:19 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Aug 2021 12:33:18 GMT",
"version": "v2"
}
] | 2021-09-15 | [
[
"Konitopoulos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
],
[
"Stavrinos",
"P. C.",
""
],
[
"Triantafyllopoulos",
"A.",
""
]
] | In this work we present the foundations of generalized scalar-tensor theories arising from vector bundle constructions, and we study the kinematic, dynamical and cosmological consequences. In particular, over a pseudo-Riemannian space-time base manifold, we define a fiber structure with two scalar fields. The resulting... |
1404.7757 | Giulio Mazzolo | G. Mazzolo, F. Salemi, M. Drago, V. Necula, C. Pankow, G. A. Prodi, V.
Re, V. Tiwari, G. Vedovato, I. Yakushin, S. Klimenko | Prospects for intermediate mass black hole binary searches with advanced
gravitational-wave detectors | 9 pages, 4 figures, corrected the name of one author (previously
misspelled) | Phys. Rev. D 90, 063002 (2014) | 10.1103/PhysRevD.90.063002 | LIGO-P1300053 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We estimated the sensitivity of the upcoming advanced, ground-based
gravitational-wave observatories (the upgraded LIGO and Virgo and the KAGRA
interferometers) to coalescing intermediate mass black hole binaries (IMBHB).
We added waveforms modeling the gravitational radiation emitted by IMBHBs to
detectors' simulate... | [
{
"created": "Wed, 30 Apr 2014 15:13:35 GMT",
"version": "v1"
},
{
"created": "Fri, 2 May 2014 07:47:30 GMT",
"version": "v2"
}
] | 2014-09-17 | [
[
"Mazzolo",
"G.",
""
],
[
"Salemi",
"F.",
""
],
[
"Drago",
"M.",
""
],
[
"Necula",
"V.",
""
],
[
"Pankow",
"C.",
""
],
[
"Prodi",
"G. A.",
""
],
[
"Re",
"V.",
""
],
[
"Tiwari",
"V.",
""
],
... | We estimated the sensitivity of the upcoming advanced, ground-based gravitational-wave observatories (the upgraded LIGO and Virgo and the KAGRA interferometers) to coalescing intermediate mass black hole binaries (IMBHB). We added waveforms modeling the gravitational radiation emitted by IMBHBs to detectors' simulated ... |
1808.01044 | Jeferson de Oliveira | R. D. B. Fontana, Jeferson de Oliveira, A. B. Pavan | Dynamical evolution of non-minimally coupled scalar field in spherically
symmetric de Sitter spacetimes | 31 pages; 11 figures, 8 tables and typos corrected | Eur.Phys.J. C79 (2019) no.4, 338, (2019-04-13) | 10.1140/epjc/s10052-019-6831-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the dynamical behavior of a scalar field non-minimally coupled
to Einstein's tensor and Ricci scalar in geometries of asymptotically de Sitter
spacetimes. We show that the quasinormal modes remain unaffected if the scalar
field is massless and the black hole is electrically chargeless. In the massive
c... | [
{
"created": "Thu, 2 Aug 2018 23:09:03 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2019 13:14:59 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Apr 2019 15:08:40 GMT",
"version": "v3"
}
] | 2019-04-25 | [
[
"Fontana",
"R. D. B.",
""
],
[
"de Oliveira",
"Jeferson",
""
],
[
"Pavan",
"A. B.",
""
]
] | We investigate the dynamical behavior of a scalar field non-minimally coupled to Einstein's tensor and Ricci scalar in geometries of asymptotically de Sitter spacetimes. We show that the quasinormal modes remain unaffected if the scalar field is massless and the black hole is electrically chargeless. In the massive cas... |
gr-qc/9211010 | null | S. Deser | Gauge (In)variance, Mass and Parity in D=3 Revisited | 11 pages | Directions in general relativity, vol 2 (Cambridge U Press 1993) | null | BRX TH-341 | gr-qc | null | We analyze the degree of equivalence between abelian topologically massive,
gauge-invariant, vector or tensor parity doublets and their explicitly massive,
non-gauge, counterparts. We establish equivalence of field equations by
exploiting a generalized Stueckelberg invariance of the gauge systems. Although
the respec... | [
{
"created": "Fri, 6 Nov 1992 17:30:00 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Deser",
"S.",
""
]
] | We analyze the degree of equivalence between abelian topologically massive, gauge-invariant, vector or tensor parity doublets and their explicitly massive, non-gauge, counterparts. We establish equivalence of field equations by exploiting a generalized Stueckelberg invariance of the gauge systems. Although the respecti... |
gr-qc/0303023 | Ulvi Yurtsever | Ulvi Yurtsever | The Holographic Entropy Bound and Local Quantum Field Theory | 5 pages, RevTeX, 1 eps figure | Phys.Rev.Lett. 91 (2003) 041302 | 10.1103/PhysRevLett.91.041302 | null | gr-qc hep-th quant-ph | null | The maximum entropy that can be stored in a bounded region of space is in
dispute: it goes as volume, implies (non-gravitational) microphysics; it goes
as the surface area, asserts the "holographic principle." Here I show how the
holographic bound can be derived from elementary flat-spacetime quantum field
theory whe... | [
{
"created": "Thu, 6 Mar 2003 12:13:10 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Yurtsever",
"Ulvi",
""
]
] | The maximum entropy that can be stored in a bounded region of space is in dispute: it goes as volume, implies (non-gravitational) microphysics; it goes as the surface area, asserts the "holographic principle." Here I show how the holographic bound can be derived from elementary flat-spacetime quantum field theory when ... |
2211.08137 | Zi-Yu Tang | Zi-Yu Tang, Xiao-Mei Kuang, Bin Wang, Wei-Liang Qian | Photon region and shadow of a rotating 5D black string | 17 pages, 6 figures. arXiv admin note: text overlap with
arXiv:2206.08608 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To explore the possible clues for the extra dimension from the Event Horizon
Telescope (EHT) observations, we study the shadow of the rotating 5D black
string in General Relativity (GR). Instead of investigating the shadow in the
effective 4D theory, we concern the motion of photons along the extra dimension
$z$ with... | [
{
"created": "Tue, 15 Nov 2022 13:45:43 GMT",
"version": "v1"
}
] | 2022-11-16 | [
[
"Tang",
"Zi-Yu",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wang",
"Bin",
""
],
[
"Qian",
"Wei-Liang",
""
]
] | To explore the possible clues for the extra dimension from the Event Horizon Telescope (EHT) observations, we study the shadow of the rotating 5D black string in General Relativity (GR). Instead of investigating the shadow in the effective 4D theory, we concern the motion of photons along the extra dimension $z$ with a... |
gr-qc/9605050 | Sumati | Rafael D. Sorkin (Syracuse U. & Mexico U., CEN), Sumati Surya
(Syracuse U.) | An Analysis of the Representations of the Mapping Class Group of a
Multi-Geon Three-Manifold | 52 pages, harvmac, 2 postscript figures, epsf required. Added an
appendix proving the semi-direct product structure of the MCG, corrected an
error in the characterization of the slide subgroup, reworded extensively.
All our analysis and conclusions remain as before | Int.J.Mod.Phys. A13 (1998) 3749-3790 | 10.1142/S0217751X98001761 | SU-GP/9601-01 | gr-qc hep-th | null | It is well known that the inequivalent unitary irreducible representations
(UIR's) of the mapping class group $G$ of a 3-manifold give rise to ``theta
sectors'' in theories of quantum gravity with fixed spatial topology. In this
paper, we study several families of UIR's of $G$ and attempt to understand the
physical i... | [
{
"created": "Wed, 22 May 1996 21:39:50 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 1997 00:53:13 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Sorkin",
"Rafael D.",
"",
"Syracuse U. & Mexico U., CEN"
],
[
"Surya",
"Sumati",
"",
"Syracuse U."
]
] | It is well known that the inequivalent unitary irreducible representations (UIR's) of the mapping class group $G$ of a 3-manifold give rise to ``theta sectors'' in theories of quantum gravity with fixed spatial topology. In this paper, we study several families of UIR's of $G$ and attempt to understand the physical imp... |
2303.16798 | Viktor Skoup\'y | Viktor Skoup\'y, Georgios Lukes-Gerakopoulos, Lisa V. Drummond, Scott
A. Hughes | Asymptotic gravitational-wave fluxes from a spinning test body on
generic orbits around a Kerr black hole | 19 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work provides gravitational wave energy and angular momentum asymptotic
fluxes from a spinning body moving on generic orbits in a Kerr spacetime up to
linear in spin approximation. To achieve this, we have developed a new
frequency domain Teukolsky equation solver that calculates asymptotic
amplitudes from gener... | [
{
"created": "Wed, 29 Mar 2023 15:39:08 GMT",
"version": "v1"
}
] | 2023-03-30 | [
[
"Skoupý",
"Viktor",
""
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Drummond",
"Lisa V.",
""
],
[
"Hughes",
"Scott A.",
""
]
] | This work provides gravitational wave energy and angular momentum asymptotic fluxes from a spinning body moving on generic orbits in a Kerr spacetime up to linear in spin approximation. To achieve this, we have developed a new frequency domain Teukolsky equation solver that calculates asymptotic amplitudes from generic... |
2407.17568 | Erik Jensko | Erik Jensko | Spatial curvature in coincident gauge $f(Q)$ cosmology | 39 pages, 1 figure | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the Friedmann-Lema\^{i}tre-Robertson-Walker cosmologies
with arbitrary spatial curvature for the symmetric teleparallel theories of
gravity, giving the first presentation of their coincident gauge form. Our
approach explicitly starts with the cosmological Killing vectors and constructs
the coinc... | [
{
"created": "Wed, 24 Jul 2024 18:01:36 GMT",
"version": "v1"
}
] | 2024-07-26 | [
[
"Jensko",
"Erik",
""
]
] | In this work we study the Friedmann-Lema\^{i}tre-Robertson-Walker cosmologies with arbitrary spatial curvature for the symmetric teleparallel theories of gravity, giving the first presentation of their coincident gauge form. Our approach explicitly starts with the cosmological Killing vectors and constructs the coincid... |
1907.05758 | Moorad Alexanian | Moorad Alexanian | Statistical Entropy of a Schwarzschild-anti-de Sitter Black Hole | null | Armenian Journal of Physics, 2019, vol. 12, issue 2, pp. 178-184 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the intrinsic entropy of a Schwarzschild black hole in an
asymptotically antide Sitter space. The statistical calculation of the entropy
is based on a model for particle structure that leads to confinement. The
constituents of the particle are distinguishable quasiparticles. The entropy
(temperature) is ... | [
{
"created": "Fri, 12 Jul 2019 14:19:51 GMT",
"version": "v1"
}
] | 2019-07-15 | [
[
"Alexanian",
"Moorad",
""
]
] | We calculate the intrinsic entropy of a Schwarzschild black hole in an asymptotically antide Sitter space. The statistical calculation of the entropy is based on a model for particle structure that leads to confinement. The constituents of the particle are distinguishable quasiparticles. The entropy (temperature) is le... |
2009.05747 | Tushar Kanti Dey | Tushar Kanti Dey and Surajit Sen | A Compendium on General Relativity for Undergraduate Students | 17 pages | Physics Education (IAPT), 36/1/8 , January - March 2020 | null | null | gr-qc physics.ed-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a pedagogical introduction of the essential features of General
Theory of Relativity (GTR) in the format of an undergraduate (UG) project. A
set of simple MATHEMATICA code is developed which enables the UG students to
calculate the tensorial objects without prior knowledge of any package
operation. The orbit ... | [
{
"created": "Sat, 12 Sep 2020 08:23:29 GMT",
"version": "v1"
}
] | 2020-09-15 | [
[
"Dey",
"Tushar Kanti",
""
],
[
"Sen",
"Surajit",
""
]
] | We give a pedagogical introduction of the essential features of General Theory of Relativity (GTR) in the format of an undergraduate (UG) project. A set of simple MATHEMATICA code is developed which enables the UG students to calculate the tensorial objects without prior knowledge of any package operation. The orbit eq... |
1303.1528 | Kent Yagi | Kent Yagi and Nicolas Yunes | I-Love-Q Relations in Neutron Stars and their Applications to
Astrophysics, Gravitational Waves and Fundamental Physics | 29 pages, 16 figures; typos corrected | Phys. Rev. D 88, 023009 (2013) | 10.1103/PhysRevD.88.023009 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exterior gravitational field of a slowly-rotating neutron star can be
characterized by its multipole moments, the first few being the neutron star
mass, moment of inertia, and quadrupole moment to quadratic order in spin. In
principle, all of these quantities depend on the neutron star's internal
structure, and t... | [
{
"created": "Wed, 6 Mar 2013 21:00:03 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 2013 03:46:03 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Nov 2017 16:53:50 GMT",
"version": "v3"
}
] | 2017-12-01 | [
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | The exterior gravitational field of a slowly-rotating neutron star can be characterized by its multipole moments, the first few being the neutron star mass, moment of inertia, and quadrupole moment to quadratic order in spin. In principle, all of these quantities depend on the neutron star's internal structure, and thu... |
gr-qc/0608060 | Farrukh Fattoyev Jabborovich | B. J. Ahmedov, M. J. Ermamatov | Electrical Conductivity in General Relativity | 16 pages, 1 figure | Phys.Lett. 15 (2002) 137-151 | null | null | gr-qc astro-ph cond-mat.other | null | The general relativistic kinetic theory including the effect of a stationary
gravitational field is applied to the electromagnetic transport processes in
conductors. Then it is applied to derive the general relativistic Ohm's law
where the gravitomagnetic terms are incorporated. The total electric charge
quantity and... | [
{
"created": "Fri, 11 Aug 2006 16:53:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ahmedov",
"B. J.",
""
],
[
"Ermamatov",
"M. J.",
""
]
] | The general relativistic kinetic theory including the effect of a stationary gravitational field is applied to the electromagnetic transport processes in conductors. Then it is applied to derive the general relativistic Ohm's law where the gravitomagnetic terms are incorporated. The total electric charge quantity and c... |
1609.00397 | Orr Sela | Orr Sela | Late-time decay of coupled electromagnetic and gravitational
perturbations outside an extremal charged black hole | 12 pages. Corrected typos | Phys. Rev. D 94, 084006 (2016) | 10.1103/PhysRevD.94.084006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we employ the results of a previous paper on the late-time
decay of scalar-field perturbations of an extreme Reissner-Nordstrom black
hole, in order to find the late-time decay of coupled electromagnetic and
gravitational perturbations of this black hole. We explicitly write the
late-time tails of Moncr... | [
{
"created": "Thu, 1 Sep 2016 20:27:06 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2016 09:21:05 GMT",
"version": "v2"
}
] | 2016-10-14 | [
[
"Sela",
"Orr",
""
]
] | In this paper we employ the results of a previous paper on the late-time decay of scalar-field perturbations of an extreme Reissner-Nordstrom black hole, in order to find the late-time decay of coupled electromagnetic and gravitational perturbations of this black hole. We explicitly write the late-time tails of Moncrie... |
1402.5656 | Christian Kr\"uger | C. J. Kr\"uger, W. C. G. Ho, N. Andersson | Seismology of adolescent neutron stars: Accounting for thermal effects
and crust elasticity | 27 pages, 14 figures | Phys. Rev. D 92, 063009 (2015) | 10.1103/PhysRevD.92.063009 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the oscillations of relativistic stars, incorporating key physics
associated with internal composition, thermal gradients and crust elasticity.
Our aim is to develop a formalism which is able to account for the
state-of-the-art understanding of the complex physics associated with these
systems. As a first st... | [
{
"created": "Sun, 23 Feb 2014 19:32:59 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2014 12:23:17 GMT",
"version": "v2"
}
] | 2015-09-16 | [
[
"Krüger",
"C. J.",
""
],
[
"Ho",
"W. C. G.",
""
],
[
"Andersson",
"N.",
""
]
] | We study the oscillations of relativistic stars, incorporating key physics associated with internal composition, thermal gradients and crust elasticity. Our aim is to develop a formalism which is able to account for the state-of-the-art understanding of the complex physics associated with these systems. As a first step... |
2307.10399 | Kazuharu Bamba | Kazuharu Bamba, M. Z. Bhatti, Z. Yousaf, Z. Shoukat | Gravitational decoupling of anisotropic stars in the Brans-Dicke theory | 15 pages, 5 figures, version accepted for publication in the European
Physical Journal C | null | null | FU-PCG-120 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Anisotropic spherically symmetric solutions within the framework of the
Brans-Dicke theory are uncovered through a unique gravitational decoupling
approach involving a minimal geometric transformation. This transformation
effectively divides the Einstein field equations into two separate systems,
resulting in the alt... | [
{
"created": "Tue, 18 Jul 2023 04:44:04 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Oct 2023 09:41:47 GMT",
"version": "v2"
}
] | 2023-11-01 | [
[
"Bamba",
"Kazuharu",
""
],
[
"Bhatti",
"M. Z.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Shoukat",
"Z.",
""
]
] | Anisotropic spherically symmetric solutions within the framework of the Brans-Dicke theory are uncovered through a unique gravitational decoupling approach involving a minimal geometric transformation. This transformation effectively divides the Einstein field equations into two separate systems, resulting in the alter... |
2012.12032 | Liliane Biskupek | Liliane Biskupek, J\"urgen M\"uller and Jean-Marie Torre | Benefit of New High-Precision LLR Data for the Determination of
Relativistic Parameters | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Since 1969, Lunar Laser Ranging (LLR) data have been collected by various
observatories and analysed by different analysis groups. In the recent years,
observations with bigger telescopes (APOLLO) and at infra-red wavelength (OCA)
are carried out, resulting in a better distribution of precise LLR data over
the lunar ... | [
{
"created": "Tue, 22 Dec 2020 14:19:30 GMT",
"version": "v1"
}
] | 2020-12-23 | [
[
"Biskupek",
"Liliane",
""
],
[
"Müller",
"Jürgen",
""
],
[
"Torre",
"Jean-Marie",
""
]
] | Since 1969, Lunar Laser Ranging (LLR) data have been collected by various observatories and analysed by different analysis groups. In the recent years, observations with bigger telescopes (APOLLO) and at infra-red wavelength (OCA) are carried out, resulting in a better distribution of precise LLR data over the lunar or... |
1902.05530 | Vladimir Dergachev Ph.D. | Vladimir Dergachev, Maria Alessandra Papa | Sensitivity improvements in the search for periodic gravitational waves
using O1 LIGO data | Updated paper title | Phys. Rev. Lett. 123, 101101 (2019) | 10.1103/PhysRevLett.123.101101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate a breakthrough in the capabilities of robust, broad-parameter
space searches for continuous gravitational waves. With a large scale search
for continuous gravitational waves on the O1 LIGO data, we prove that our
Falcon search achieves the sensitivity improvements expected from the use of a
long cohere... | [
{
"created": "Thu, 14 Feb 2019 18:13:19 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2019 20:56:28 GMT",
"version": "v2"
},
{
"created": "Thu, 30 May 2019 20:05:14 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Sep 2019 19:20:27 GMT",
"version": "v4"
}
] | 2019-09-23 | [
[
"Dergachev",
"Vladimir",
""
],
[
"Papa",
"Maria Alessandra",
""
]
] | We demonstrate a breakthrough in the capabilities of robust, broad-parameter space searches for continuous gravitational waves. With a large scale search for continuous gravitational waves on the O1 LIGO data, we prove that our Falcon search achieves the sensitivity improvements expected from the use of a long coherenc... |
1105.6193 | Salvatore Capozziello | S. Capozziello, G. Basini, M. De Laurentis | Deriving the mass of particles from Extended Theories of Gravity in LHC
era | 30 pages, 1 figure | null | 10.1140/epjc/s10052-011-1679-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a geometrical approach to produce the mass of particles that could
be suitably tested at LHC. Starting from a 5D unification scheme, we show that
all the known interactions could be suitably deduced as an induced symmetry
breaking of the non-unitary GL(4)-group of diffeomorphisms. The deformations
inducing ... | [
{
"created": "Tue, 31 May 2011 07:56:29 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Capozziello",
"S.",
""
],
[
"Basini",
"G.",
""
],
[
"De Laurentis",
"M.",
""
]
] | We derive a geometrical approach to produce the mass of particles that could be suitably tested at LHC. Starting from a 5D unification scheme, we show that all the known interactions could be suitably deduced as an induced symmetry breaking of the non-unitary GL(4)-group of diffeomorphisms. The deformations inducing su... |
1506.02858 | Matthew Wright | Matthew Wright | Buchdahl type inequalities in $d$-dimensions | 23 pages. To appear in Classical and Quantum Gravity. Matches
published version. Typos fixed, section added discussing saturation of bounds | Class. Quantum Grav. 32 (2015) 215005 | 10.1088/0264-9381/32/21/215005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically symmetric anisotropic static compact solutions to the Einstein
equations in dimension $d\geq4$ are considered. Various matter models are
examined and upper bounds on the ratio of the gravitational mass to the radius
in these different models are obtained. Bounds are also generalised in the
presence of a n... | [
{
"created": "Tue, 9 Jun 2015 10:48:34 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jun 2015 16:44:09 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Sep 2015 09:22:55 GMT",
"version": "v3"
}
] | 2015-10-09 | [
[
"Wright",
"Matthew",
""
]
] | Spherically symmetric anisotropic static compact solutions to the Einstein equations in dimension $d\geq4$ are considered. Various matter models are examined and upper bounds on the ratio of the gravitational mass to the radius in these different models are obtained. Bounds are also generalised in the presence of a non... |
gr-qc/9910082 | Daniel Cartin | Daniel Cartin | Linearized general relativity and the Lanczos potential | 5 pages, LaTeX 2e | null | null | CGPG 99/10-4 | gr-qc hep-th | null | Recently, there has been a revival of interest in the Lanczos potential of
the Weyl conformal tensor. Previous work by Novello and Neto has been done with
the linearized Lanczos potential as a model of a spin-2 field, which depends on
a massless limit of the field. In this paper, we look at an action based on a
massl... | [
{
"created": "Mon, 25 Oct 1999 15:22:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cartin",
"Daniel",
""
]
] | Recently, there has been a revival of interest in the Lanczos potential of the Weyl conformal tensor. Previous work by Novello and Neto has been done with the linearized Lanczos potential as a model of a spin-2 field, which depends on a massless limit of the field. In this paper, we look at an action based on a massles... |
2212.06448 | Orlando Luongo | Alessio Belfiglio, Orlando Luongo, Stefano Mancini | Inflationary entanglement | 16 pages, 5 figures | Phys. Rev. D, 107, 103512 (2023) | 10.1103/PhysRevD.107.103512 | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the entanglement due to geometric corrections in particle
creation during inflation. To do so, we propose a single-field inflationary
scenario, nonminimally coupled to the scalar curvature of spacetime. We require
particle production to be purely geometric, setting to zero the Bogolubov
coefficients an... | [
{
"created": "Tue, 13 Dec 2022 09:36:54 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jun 2023 16:39:21 GMT",
"version": "v2"
}
] | 2023-06-05 | [
[
"Belfiglio",
"Alessio",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Mancini",
"Stefano",
""
]
] | We investigate the entanglement due to geometric corrections in particle creation during inflation. To do so, we propose a single-field inflationary scenario, nonminimally coupled to the scalar curvature of spacetime. We require particle production to be purely geometric, setting to zero the Bogolubov coefficients and ... |
gr-qc/0608114 | Louis Rubbo | Louis J. Rubbo | When is Enough Good Enough in Gravitational Wave Source Modeling? | 7 pages, 2 figures, proceedings paper for the Sixth International
LISA Symposium | null | 10.1063/1.2405106 | null | gr-qc | null | A typical approach to developing an analysis algorithm for analyzing
gravitational wave data is to assume a particular waveform and use its
characteristics to formulate a detection criteria. Once a detection has been
made, the algorithm uses those same characteristics to tease out parameter
estimates from a given dat... | [
{
"created": "Mon, 28 Aug 2006 17:15:35 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Rubbo",
"Louis J.",
""
]
] | A typical approach to developing an analysis algorithm for analyzing gravitational wave data is to assume a particular waveform and use its characteristics to formulate a detection criteria. Once a detection has been made, the algorithm uses those same characteristics to tease out parameter estimates from a given data ... |
gr-qc/0005114 | Tomohiro Harada | Tomohiro Harada (Waseda U.), Hideo Iguchi (Osaka U.), and Ken-ichi
Nakao (Osaka City U.) | Power, energy, and spectrum of a naked singularity explosion | 34 pages, 13 postscript figures included, to appear in Phys. Rev. D,
grammatical errors corrected | Phys.Rev. D62 (2000) 084037 | 10.1103/PhysRevD.62.084037 | WU-AP/98/00, OU-TAP 137, OCU-PHYS-174 | gr-qc astro-ph hep-th quant-ph | null | Naked singularity occurs in the gravitational collapse of an inhomogeneous
dust ball from an initial density profile which is physically reasonable. We
show that explosive radiation is emitted during the formation process of the
naked singularity. The energy flux is proportional to $(t_{\rm CH}-t)^{-3/2}$
for a minim... | [
{
"created": "Thu, 25 May 2000 06:32:29 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2000 10:26:28 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Harada",
"Tomohiro",
"",
"Waseda U."
],
[
"Iguchi",
"Hideo",
"",
"Osaka U."
],
[
"Nakao",
"Ken-ichi",
"",
"Osaka City U."
]
] | Naked singularity occurs in the gravitational collapse of an inhomogeneous dust ball from an initial density profile which is physically reasonable. We show that explosive radiation is emitted during the formation process of the naked singularity. The energy flux is proportional to $(t_{\rm CH}-t)^{-3/2}$ for a minimal... |
2107.14618 | Mohamed Ibrahim Nouh | A. S. Saad, M. I. Nouh, A. A. Shaker and T. M. Kamel | Stability Analysis of Relativistic Polytropes | 24 pages, 6 figures | null | 10.22201/ia.01851101p.2021.57.02.13 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | A main question in astrophysics and cosmology has been the severe stability
of the astrophysical objects, whether a particular equilibrium configuration is
stable. In this article, we study the relativistic self-gravitating,
hydrostatic spheres with a polytropic equation of state , considering
structures with the pol... | [
{
"created": "Thu, 29 Jul 2021 04:09:11 GMT",
"version": "v1"
}
] | 2022-03-23 | [
[
"Saad",
"A. S.",
""
],
[
"Nouh",
"M. I.",
""
],
[
"Shaker",
"A. A.",
""
],
[
"Kamel",
"T. M.",
""
]
] | A main question in astrophysics and cosmology has been the severe stability of the astrophysical objects, whether a particular equilibrium configuration is stable. In this article, we study the relativistic self-gravitating, hydrostatic spheres with a polytropic equation of state , considering structures with the polyt... |
2309.04991 | Sayantan Dey | Sayantan Dey | Stability analysis for a cosmologically viable model of $f(R)$ gravity | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent times, there has been an increasing interest with theories of
modified gravity as a means to gain a deeper understanding of the universe's
late-time acceleration phase. In this study we focused our attention on a
specific cosmologically viable $f(R)$ model. We performed a dynamic stability
analysis of this ... | [
{
"created": "Sun, 10 Sep 2023 10:53:51 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Dey",
"Sayantan",
""
]
] | In recent times, there has been an increasing interest with theories of modified gravity as a means to gain a deeper understanding of the universe's late-time acceleration phase. In this study we focused our attention on a specific cosmologically viable $f(R)$ model. We performed a dynamic stability analysis of this mo... |
1611.09970 | Hernando Quevedo | Christine Gruber and Hernando Quevedo | Geometrothermodynamic model for the evolution of the Universe | 5 latex pages | JCAP 07 (2017) 032 | 10.1088/1475-7516/2017/07/032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the formalism of geometrothermodynamics to derive a fundamental
thermodynamic equation, we construct a cosmological model in the framework of
relativistic cosmology. In a first step, we describe a system without
thermodynamic interaction, and show it to be equivalent to the standard
$\Lambda$CDM paradigm. The s... | [
{
"created": "Wed, 30 Nov 2016 02:06:56 GMT",
"version": "v1"
}
] | 2017-08-25 | [
[
"Gruber",
"Christine",
""
],
[
"Quevedo",
"Hernando",
""
]
] | Using the formalism of geometrothermodynamics to derive a fundamental thermodynamic equation, we construct a cosmological model in the framework of relativistic cosmology. In a first step, we describe a system without thermodynamic interaction, and show it to be equivalent to the standard $\Lambda$CDM paradigm. The sec... |
gr-qc/0305076 | Pascual-Sanchez J.-F. | J.-F. Pascual-S\'anchez, A. San Miguel, F. Vicente (Univ. de
Valladolid) | Isotropy of the velocity of light and the Sagnac effect | LaTeX, 13 pages, 3 eps figures; typos corrected, added references,
minor changes; to appear in "Relativity in Rotating Frames", ed. G. Rizzi G.
and M.L. Ruggiero, Kluwer Academic Publishers, Dordrecht (2003) | null | null | null | gr-qc physics.class-ph | null | In this paper, it is shown, using a geometrical approach, the isotropy of the
velocity of light measured in a rotating frame in Minkowski space-time, and it
is verified that this result is compatible with the Sagnac effect. Furthermore,
we find that this problem can be reduced to the solution of geodesic triangles
in... | [
{
"created": "Tue, 20 May 2003 12:42:51 GMT",
"version": "v1"
},
{
"created": "Thu, 22 May 2003 12:17:38 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Jun 2003 12:35:00 GMT",
"version": "v3"
},
{
"created": "Tue, 10 Jun 2003 12:38:40 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Pascual-Sánchez",
"J. -F.",
"",
"Univ. de\n Valladolid"
],
[
"Miguel",
"A. San",
"",
"Univ. de\n Valladolid"
],
[
"Vicente",
"F.",
"",
"Univ. de\n Valladolid"
]
] | In this paper, it is shown, using a geometrical approach, the isotropy of the velocity of light measured in a rotating frame in Minkowski space-time, and it is verified that this result is compatible with the Sagnac effect. Furthermore, we find that this problem can be reduced to the solution of geodesic triangles in a... |
2106.16114 | Sarbari Guha Dr. | Samarjit Chakraborty, Sarbari Guha, Rituparno Goswami | How appropriate are the gravitational entropy proposals for traversable
wormholes? | 29 pages, 38 figures | General Relativity and Gravitation (2022) | 10.1007/s10714-022-02934-3 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we have examined the validity of some proposed definitions of
gravitational entropy (GE) in the context of traversable wormhole solutions of
the Einstein field equations. Here we have adopted two different proposals of
GE and checked for their applicability in the case of these wormholes. The
first one ... | [
{
"created": "Wed, 30 Jun 2021 15:10:49 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2022 18:45:56 GMT",
"version": "v2"
}
] | 2022-06-01 | [
[
"Chakraborty",
"Samarjit",
""
],
[
"Guha",
"Sarbari",
""
],
[
"Goswami",
"Rituparno",
""
]
] | In this paper we have examined the validity of some proposed definitions of gravitational entropy (GE) in the context of traversable wormhole solutions of the Einstein field equations. Here we have adopted two different proposals of GE and checked for their applicability in the case of these wormholes. The first one is... |
1404.1750 | Carlo Rovelli | Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli, Freddy P. Zen | How many quanta are there in a quantum spacetime? | 16 pages, 9 figures | null | 10.1088/0264-9381/32/16/165019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following earlier insights by Livine and Terno, we develop a technique for
describing quantum states of the gravitational field in terms of coarse grained
spin networks. We show that the number of nodes and links and the values of the
spin depend on the observables chosen for the description of the state. Hence
the q... | [
{
"created": "Mon, 7 Apr 2014 11:28:37 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Ariwahjoedi",
"Seramika",
""
],
[
"Kosasih",
"Jusak Sali",
""
],
[
"Rovelli",
"Carlo",
""
],
[
"Zen",
"Freddy P.",
""
]
] | Following earlier insights by Livine and Terno, we develop a technique for describing quantum states of the gravitational field in terms of coarse grained spin networks. We show that the number of nodes and links and the values of the spin depend on the observables chosen for the description of the state. Hence the que... |
gr-qc/0508096 | R\'ejean J. Dupuis | R\'ejean J. Dupuis and Graham Woan | Bayesian estimation of pulsar parameters from gravitational wave data | 9 pages, 6 figures. Accepted to Phys. Rev. D. A few small changes
from previous version | Phys.Rev. D72 (2005) 102002 | 10.1103/PhysRevD.72.102002 | null | gr-qc astro-ph | null | We present a method of searching for, and parameterizing, signals from known
radio pulsars in data from interferometric gravitational wave detectors. This
method has been applied to data from the LIGO and GEO 600 detectors to set
upper limits on the gravitational wave emission from several radio pulsars.
Here we disc... | [
{
"created": "Tue, 23 Aug 2005 15:07:42 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2005 19:06:23 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Dupuis",
"Réjean J.",
""
],
[
"Woan",
"Graham",
""
]
] | We present a method of searching for, and parameterizing, signals from known radio pulsars in data from interferometric gravitational wave detectors. This method has been applied to data from the LIGO and GEO 600 detectors to set upper limits on the gravitational wave emission from several radio pulsars. Here we discus... |
2212.03168 | Marek Li\v{s}ka | Ana Alonso-Serrano, Marek Li\v{s}ka | Emergence of quadratic gravity from entanglement equilibrium | 8 pages, 1 figure. Matches the version accepted in PRD | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we derive the linearised equations of quadratic gravity from
entanglement equilibrium of local causal diamonds. Rather than starting from
the Wald entropy prescription (which depends on the gravitational Lagrangian),
we employ a model independent approach based on the logarithmic corrections to
horizon ... | [
{
"created": "Tue, 6 Dec 2022 17:43:39 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Oct 2023 09:23:43 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Alonso-Serrano",
"Ana",
""
],
[
"Liška",
"Marek",
""
]
] | In this work, we derive the linearised equations of quadratic gravity from entanglement equilibrium of local causal diamonds. Rather than starting from the Wald entropy prescription (which depends on the gravitational Lagrangian), we employ a model independent approach based on the logarithmic corrections to horizon en... |
gr-qc/0512073 | David D. Reid | Raluca Ilie, Gregory B. Thompson, and David D. Reid | A numerical study of the correspondence between paths in a causal set
and geodesics in the continuum | To the celebration of the 60th birthday of Rafael D. Sorkin | Class.Quant.Grav. 23 (2006) 3275-3286 | 10.1088/0264-9381/23/10/002 | null | gr-qc | null | This paper presents the results of a computational study related to the
path-geodesic correspondence in causal sets. For intervals in flat spacetimes,
and in selected curved spacetimes, we present evidence that the longest maximal
chains (the longest paths) in the corresponding causal set intervals
statistically appr... | [
{
"created": "Tue, 13 Dec 2005 13:19:33 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ilie",
"Raluca",
""
],
[
"Thompson",
"Gregory B.",
""
],
[
"Reid",
"David D.",
""
]
] | This paper presents the results of a computational study related to the path-geodesic correspondence in causal sets. For intervals in flat spacetimes, and in selected curved spacetimes, we present evidence that the longest maximal chains (the longest paths) in the corresponding causal set intervals statistically approa... |
2307.07360 | Che-Yu Chen | Che-Yu Chen, Petr Kotla\v{r}\'ik | Quasinormal modes of black holes encircled by a gravitating thin disk | 14 pages, 10 figures. Matching published version | Phys. Rev. D 108 (2023) 064052 | 10.1103/PhysRevD.108.064052 | RIKEN-iTHEMS-Report-23 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ringdown phase of gravitational waves emitted by a perturbed black hole
is described by a superposition of exponentially decaying sinusoidal modes,
called quasinormal modes (QNMs), whose frequencies depend only on the property
of the black hole geometry. The extraction of QNM frequencies of an isolated
black hole... | [
{
"created": "Fri, 14 Jul 2023 14:05:56 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2023 15:27:55 GMT",
"version": "v2"
}
] | 2023-10-04 | [
[
"Chen",
"Che-Yu",
""
],
[
"Kotlařík",
"Petr",
""
]
] | The ringdown phase of gravitational waves emitted by a perturbed black hole is described by a superposition of exponentially decaying sinusoidal modes, called quasinormal modes (QNMs), whose frequencies depend only on the property of the black hole geometry. The extraction of QNM frequencies of an isolated black hole w... |
gr-qc/9906068 | Carsten Gundlach | C. Gundlach and J. M. Martin-Garcia | Gauge-invariant and coordinate-independent perturbations of stellar
collapse I: the interior | 21 pages, RevTex | Phys.Rev. D61 (2000) 084024 | 10.1103/PhysRevD.61.084024 | null | gr-qc | null | Small non-spherical perturbations of a spherically symmetric but
time-dependent background spacetime can be used to model situations of
astrophysical interest, for example the production of gravitational waves in a
supernova explosion. We allow for perfect fluid matter with an arbitrary
equation of state p=p(rho,s), ... | [
{
"created": "Wed, 16 Jun 1999 21:56:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gundlach",
"C.",
""
],
[
"Martin-Garcia",
"J. M.",
""
]
] | Small non-spherical perturbations of a spherically symmetric but time-dependent background spacetime can be used to model situations of astrophysical interest, for example the production of gravitational waves in a supernova explosion. We allow for perfect fluid matter with an arbitrary equation of state p=p(rho,s), co... |
gr-qc/9708023 | null | B. L. Hu and K. Shiokawa | Wave Propagation in Stochastic Spacetimes: Localization, Amplification
and Particle Creation | 26 pages, 1 Postscript figure, submitted to Phys. Rev. D on July 29,
1997 | Phys. Rev. D 57, 3474 (1998) | 10.1103/PhysRevD.57.3474 | umdpp 97-125 | gr-qc cond-mat | null | Here we study novel effects associated with electromagnetic wave propagation
in a Robertson-Walker universe and the Schwarzschild spacetime with a small
amount of metric stochasticity. We find that localization of electromagnetic
waves occurs in a Robertson-Walker universe with time-independent metric
stochasticity, ... | [
{
"created": "Tue, 12 Aug 1997 01:30:42 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Hu",
"B. L.",
""
],
[
"Shiokawa",
"K.",
""
]
] | Here we study novel effects associated with electromagnetic wave propagation in a Robertson-Walker universe and the Schwarzschild spacetime with a small amount of metric stochasticity. We find that localization of electromagnetic waves occurs in a Robertson-Walker universe with time-independent metric stochasticity, wh... |
1604.05415 | Edward Anderson | Edward Anderson | On Types of Observables in Constrained Theories | 12 pages, including 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Kuchar observables notion is shown to apply only to a limited range of
theories. Relational mechanics, slightly inhomogeneous cosmology and
supergravity are used as examples that require further notions of observables.
A suitably general notion of A-observables is then given to cover all of these
cases. `A' here ... | [
{
"created": "Tue, 19 Apr 2016 03:07:47 GMT",
"version": "v1"
}
] | 2016-04-20 | [
[
"Anderson",
"Edward",
""
]
] | The Kuchar observables notion is shown to apply only to a limited range of theories. Relational mechanics, slightly inhomogeneous cosmology and supergravity are used as examples that require further notions of observables. A suitably general notion of A-observables is then given to cover all of these cases. `A' here st... |
1311.2573 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Tekin Dereli, Neslihan Oflaz | Accelerating anisotropic cosmologies in Brans-Dicke gravity coupled to a
mass-varying vector field | 15 pages, no figures and tables; matches the version published in
Classical and Quantum Gravity | Classical and Quantum Gravity 31 (2014) 045020 | 10.1088/0264-9381/31/4/045020 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The field equations of Brans-Dicke gravity coupled to a mass-varying vector
field are derived. Anisotropic cosmological solutions with a locally
rotationally symmetric Bianchi type I metric and time-dependent scalar and
electric vector fields are studied. A particular class of exact solutions for
which all the variab... | [
{
"created": "Mon, 11 Nov 2013 20:40:12 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jan 2014 16:32:06 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Feb 2014 13:02:52 GMT",
"version": "v3"
}
] | 2014-02-05 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Dereli",
"Tekin",
""
],
[
"Oflaz",
"Neslihan",
""
]
] | The field equations of Brans-Dicke gravity coupled to a mass-varying vector field are derived. Anisotropic cosmological solutions with a locally rotationally symmetric Bianchi type I metric and time-dependent scalar and electric vector fields are studied. A particular class of exact solutions for which all the variable... |
2108.12368 | Katerina Chatziioannou | Katerina Chatziioannou | Uncertainty limits on neutron star radius measurements with
gravitational waves | 5 pages, 3 figures, published version | null | 10.1103/PhysRevD.105.084021 | null | gr-qc astro-ph.HE nucl-th | http://creativecommons.org/licenses/by/4.0/ | Upcoming observing campaigns with improved detectors will yield numerous
detections of gravitational waves from neutron star binary inspirals. Rare loud
signals together with numerous signals of moderate strength promise stringent
constraints on the properties of neutron star matter, with a projected radius
statistic... | [
{
"created": "Fri, 27 Aug 2021 16:02:48 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Apr 2022 17:18:16 GMT",
"version": "v2"
}
] | 2022-04-15 | [
[
"Chatziioannou",
"Katerina",
""
]
] | Upcoming observing campaigns with improved detectors will yield numerous detections of gravitational waves from neutron star binary inspirals. Rare loud signals together with numerous signals of moderate strength promise stringent constraints on the properties of neutron star matter, with a projected radius statistical... |
2102.10479 | Shao-Jun Zhang | Shao-Jun Zhang | Massive scalar field perturbation on Kerr black holes in dynamical
Chern-Simons gravity | v1:14 pages, 4 figures;v2: minor modification, refs added. v3: minor
modification, more refs, match published version | Eur.Phys.J.C 81 (2021) 5, 441 | 10.1140/epjc/s10052-021-09249-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study massive scalar field perturbation on Kerr black holes in dynamical
Chern-Simons gravity by performing a $(2+1)$-dimensional simulation. Object
pictures of the wave dynamics in time domain are obtained. The tachyonic
instability is found to always occur for any nonzero black hole spin and any
scalar field mas... | [
{
"created": "Sun, 21 Feb 2021 00:04:12 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Mar 2021 07:10:33 GMT",
"version": "v2"
},
{
"created": "Thu, 27 May 2021 12:10:21 GMT",
"version": "v3"
}
] | 2021-05-28 | [
[
"Zhang",
"Shao-Jun",
""
]
] | We study massive scalar field perturbation on Kerr black holes in dynamical Chern-Simons gravity by performing a $(2+1)$-dimensional simulation. Object pictures of the wave dynamics in time domain are obtained. The tachyonic instability is found to always occur for any nonzero black hole spin and any scalar field mass ... |
2305.02726 | Serge Parnovsky | S L Parnovsky | Is the Universe anisotropic right now? Comparing the real Universe with
the Kasner's space-time | 18 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate possible astronomical manifestations of space-time anisotropy.
The homogeneous vacuum Kasner solution was chosen as a reference anisotropic
cosmological model because there are no effects caused by inhomogeneity in this
simple model with a constant degree of anisotropy. This anisotropy cannot
become we... | [
{
"created": "Thu, 4 May 2023 10:48:48 GMT",
"version": "v1"
},
{
"created": "Sun, 28 May 2023 15:49:28 GMT",
"version": "v2"
}
] | 2023-05-30 | [
[
"Parnovsky",
"S L",
""
]
] | We investigate possible astronomical manifestations of space-time anisotropy. The homogeneous vacuum Kasner solution was chosen as a reference anisotropic cosmological model because there are no effects caused by inhomogeneity in this simple model with a constant degree of anisotropy. This anisotropy cannot become weak... |
1011.1179 | Johannes Hartung | Johannes Hartung and Jan Steinhoff | Next-to-leading order spin-orbit and spin(a)-spin(b) Hamiltonians for n
gravitating spinning compact objects | 13 pages, 1 Mathematica source file, v2: submitted version, v3:
published version, some minor corrections | Phys.Rev.D83:044008,2011 | 10.1103/PhysRevD.83.044008 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the post-Newtonian next-to-leading order conservative spin-orbit
and spin(a)-spin(b) gravitational interaction Hamiltonians for arbitrary many
compact objects. The spin-orbit Hamiltonian completes the knowledge of
Hamiltonians up to and including 2.5PN for the general relativistic three-body
problem. The ne... | [
{
"created": "Thu, 4 Nov 2010 15:00:23 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Nov 2010 19:07:30 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Feb 2011 15:35:10 GMT",
"version": "v3"
}
] | 2011-02-11 | [
[
"Hartung",
"Johannes",
""
],
[
"Steinhoff",
"Jan",
""
]
] | We derive the post-Newtonian next-to-leading order conservative spin-orbit and spin(a)-spin(b) gravitational interaction Hamiltonians for arbitrary many compact objects. The spin-orbit Hamiltonian completes the knowledge of Hamiltonians up to and including 2.5PN for the general relativistic three-body problem. The new ... |
1910.12133 | Zainab Sedaghatmanesh | Mohammad.A Ganjali, Zainab Sedaghatmanesh | Laser Interferometer in Presence of Scalar field on Gravitational Wave
Background | 20 pages, 1 figure | Class. Quantum Grav. 38 (2021) 105010 (16pp) | 10.1088/1361-6382/abdd0e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detection of gravitational waves (GW) opened new windows on fundamental
physics and it would be natural to search how the role of extra dimensional
effects can be traced to gravitational wave physics. In this article, we
consider a toy model of five dimensional pure gravity theory compactified on a
circle. The result... | [
{
"created": "Sat, 26 Oct 2019 20:30:17 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Nov 2020 06:56:20 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Aug 2021 14:48:27 GMT",
"version": "v3"
}
] | 2021-08-31 | [
[
"Ganjali",
"Mohammad. A",
""
],
[
"Sedaghatmanesh",
"Zainab",
""
]
] | Detection of gravitational waves (GW) opened new windows on fundamental physics and it would be natural to search how the role of extra dimensional effects can be traced to gravitational wave physics. In this article, we consider a toy model of five dimensional pure gravity theory compactified on a circle. The resultin... |
2010.09363 | Ya-Peng Hu | Ya-Peng Hu, Liang Cai, Xiao Liang, Shi-Bei Kong and Hongsheng Zhang | Divergence Behavior of Thermodynamic Curvature Scalar at Critical Point
in the Extended Phase Space of Generic Black Holes | 10 pages, no figure, version accepted by PLB | null | 10.1016/j.physletb.2021.136661 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $P$-$V$ phase transition and critical behavior in the extended phase
space of asymptotic Anti-de Sitter (AdS) black holes have been widely
investigated, in which four critical exponents around critical point are found
to be consistent with values in the mean field theory. Recently, another
critical exponent $\nu$... | [
{
"created": "Mon, 19 Oct 2020 10:03:35 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Sep 2021 15:17:54 GMT",
"version": "v2"
}
] | 2021-09-29 | [
[
"Hu",
"Ya-Peng",
""
],
[
"Cai",
"Liang",
""
],
[
"Liang",
"Xiao",
""
],
[
"Kong",
"Shi-Bei",
""
],
[
"Zhang",
"Hongsheng",
""
]
] | The $P$-$V$ phase transition and critical behavior in the extended phase space of asymptotic Anti-de Sitter (AdS) black holes have been widely investigated, in which four critical exponents around critical point are found to be consistent with values in the mean field theory. Recently, another critical exponent $\nu$ r... |
gr-qc/0304023 | A. W. Whinnett | A. W. Whinnett | Neutron Stars in a Varying Speed of Light Theory | 15 pages, 2 figures. Added solutions with a more realistic equation
of state. To be published in PRD | Phys.Rev. D68 (2003) 024009 | 10.1103/PhysRevD.68.024009 | null | gr-qc | null | We study neutron stars in a varying speed of light (VSL) theory of gravity in
which the local speed of light depends upon the value of a scalar field $\phi$.
We find that the masses and radii of the stars are strongly dependent on the
strength of the coupling between $\phi$ and the matter field and that for
certain c... | [
{
"created": "Fri, 4 Apr 2003 17:29:06 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 2003 13:18:57 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Whinnett",
"A. W.",
""
]
] | We study neutron stars in a varying speed of light (VSL) theory of gravity in which the local speed of light depends upon the value of a scalar field $\phi$. We find that the masses and radii of the stars are strongly dependent on the strength of the coupling between $\phi$ and the matter field and that for certain cho... |
1701.02556 | Thomas M\"adler | Thomas M\"adler and Jeffrey Winicour | Radiation Memory, Boosted Schwarzschild Spacetimes and Supertranslations | matches published version | null | 10.1088/1361-6382/aa6ca8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate gravitational radiation memory and its corresponding effect on
the asymptotic symmetries of a body whose exterior is a boosted Schwarzschild
spacetime. First, in the context of linearized theory, we consider such a
Schwarzschild body which is initially at rest, then goes through a radiative
stage and f... | [
{
"created": "Tue, 10 Jan 2017 12:38:53 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Jan 2017 10:15:36 GMT",
"version": "v2"
},
{
"created": "Fri, 19 May 2017 15:20:04 GMT",
"version": "v3"
}
] | 2017-05-22 | [
[
"Mädler",
"Thomas",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | We investigate gravitational radiation memory and its corresponding effect on the asymptotic symmetries of a body whose exterior is a boosted Schwarzschild spacetime. First, in the context of linearized theory, we consider such a Schwarzschild body which is initially at rest, then goes through a radiative stage and fin... |
2101.03948 | Pravin Dahal | Pravin Kumar Dahal | Properties of space-time in the vicinity of trapped regions | 46 pages, 3 figures. Thesis submitted for the Master of Research.
Macquarie University, November 2020 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the near horizon geometry of the simplest representative of
the class of axisymmetric space-times: the Kerr Vaidya metrics. Kerr Vaidya
metrics can be derived from the Vaidya metric by the complex coordinate
transformation suggested by Newman and Janis. We show that the energy momentum
tensor belongs t... | [
{
"created": "Fri, 8 Jan 2021 13:41:54 GMT",
"version": "v1"
}
] | 2021-01-12 | [
[
"Dahal",
"Pravin Kumar",
""
]
] | We investigate the near horizon geometry of the simplest representative of the class of axisymmetric space-times: the Kerr Vaidya metrics. Kerr Vaidya metrics can be derived from the Vaidya metric by the complex coordinate transformation suggested by Newman and Janis. We show that the energy momentum tensor belongs to ... |
1610.00135 | Elizabeth Winstanley | Supakchai Ponglertsakul and Elizabeth Winstanley | Effect of scalar field mass on gravitating charged scalar solitons and
black holes in a cavity | Minor changes, 7 pages, 7 figures | null | 10.1016/j.physletb.2016.10.073 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study soliton and black hole solutions of Einstein charged scalar field
theory in cavity. We examine the effect of introducing a scalar field mass on
static, spherically symmetric solutions of the field equations. We focus
particularly on the spaces of soliton and black hole solutions, as well as
studying their st... | [
{
"created": "Sat, 1 Oct 2016 13:31:48 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2016 20:57:19 GMT",
"version": "v2"
}
] | 2016-11-11 | [
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We study soliton and black hole solutions of Einstein charged scalar field theory in cavity. We examine the effect of introducing a scalar field mass on static, spherically symmetric solutions of the field equations. We focus particularly on the spaces of soliton and black hole solutions, as well as studying their stab... |
gr-qc/0408008 | Sean A. Hayward | Sean A. Hayward | Energy and entropy conservation for dynamical black holes | 16 revtex4 pages, 2 eps figures, expanded discussion of horizon types
and evaporating black holes | Phys.Rev.D70:104027,2004 | 10.1103/PhysRevD.70.104027 | null | gr-qc | null | The Ashtekar-Krishnan energy-balance law for dynamical horizons, expressing
the increase in mass-energy of a general black hole in terms of the infalling
matter and gravitational radiation, is expressed in terms of trapping horizons,
allowing the inclusion of null (isolated) horizons as well as spatial
(dynamical) ho... | [
{
"created": "Tue, 3 Aug 2004 08:39:38 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2004 12:17:41 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hayward",
"Sean A.",
""
]
] | The Ashtekar-Krishnan energy-balance law for dynamical horizons, expressing the increase in mass-energy of a general black hole in terms of the infalling matter and gravitational radiation, is expressed in terms of trapping horizons, allowing the inclusion of null (isolated) horizons as well as spatial (dynamical) hori... |
1806.01473 | Vitor Silveira Barroso | V. S. Barroso and J. P. M. Pitelli | Vacuum Fluctuations and Boundary Conditions in a Global Monopole | 7 pages, submitted to PRD | Phys. Rev. D 98, 065009 (2018) | 10.1103/PhysRevD.98.065009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the vacuum fluctuations of a massless scalar field $\hat{\Psi}$ on
the background of a global monopole. Due to the nontrivial topology of the
global monopole spacetime, characterized by a solid deficit angle parametrized
by $\eta^2$, we expect that $\left<\hat{\Psi}^2\right>_{\text{ren}}$ and
$\left<\hat{T}_... | [
{
"created": "Tue, 5 Jun 2018 03:01:25 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jun 2018 16:26:47 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Aug 2018 13:54:46 GMT",
"version": "v3"
}
] | 2018-09-19 | [
[
"Barroso",
"V. S.",
""
],
[
"Pitelli",
"J. P. M.",
""
]
] | We study the vacuum fluctuations of a massless scalar field $\hat{\Psi}$ on the background of a global monopole. Due to the nontrivial topology of the global monopole spacetime, characterized by a solid deficit angle parametrized by $\eta^2$, we expect that $\left<\hat{\Psi}^2\right>_{\text{ren}}$ and $\left<\hat{T}_{\... |
2212.01182 | Aurelien Barrau | Maxime De Sousa, Killian Martineau, Cyril Renevey, Aur\'elien Barrau | Impact of generalized holonomy corrections on the cosmological
primordial power spectra | null | null | 10.1103/PhysRevD.107.126008 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of perturbations is studied with generalized holonomy
corrections in a fully consistent way, ensuring that the deformed algebra of
constraints remains closed. The primordial cosmological power spectra are
calculated. It is shown that, although the detailed form of the correction does
unavoidably impac... | [
{
"created": "Fri, 2 Dec 2022 14:06:41 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jun 2023 11:24:25 GMT",
"version": "v2"
}
] | 2023-06-28 | [
[
"De Sousa",
"Maxime",
""
],
[
"Martineau",
"Killian",
""
],
[
"Renevey",
"Cyril",
""
],
[
"Barrau",
"Aurélien",
""
]
] | The propagation of perturbations is studied with generalized holonomy corrections in a fully consistent way, ensuring that the deformed algebra of constraints remains closed. The primordial cosmological power spectra are calculated. It is shown that, although the detailed form of the correction does unavoidably impact ... |
1411.7326 | Kayll Lake | Kayll Lake | Central density cusps in the Lema\^{i}tre-Tolman solutions | 4 pages 1 figure revtex 4-1 updated final form to appear in Phys Rev
D | Phys. Rev. D 91, 124036 (2015) | 10.1103/PhysRevD.91.124036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The character of the central density profile in the Lema\^{i}tre-Tolman (LT)
solutions plays a fundamental role in their application as cosmological models.
This same character is studied here for these solutions used to model complete
gravitational collapse. A necessary condition for the development of a black
hole ... | [
{
"created": "Wed, 26 Nov 2014 18:46:39 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2015 18:07:11 GMT",
"version": "v2"
},
{
"created": "Thu, 28 May 2015 16:48:46 GMT",
"version": "v3"
}
] | 2015-06-24 | [
[
"Lake",
"Kayll",
""
]
] | The character of the central density profile in the Lema\^{i}tre-Tolman (LT) solutions plays a fundamental role in their application as cosmological models. This same character is studied here for these solutions used to model complete gravitational collapse. A necessary condition for the development of a black hole (n... |
2009.11156 | Polina Dyadina | N. Avdeev, P. Dyadina, S. Labazova | Test of hybrid metric-Palatini f(R)-gravity in binary pulsars | 12 pages, 4 figures | JETP Vol. 131, pp. 537-547 (2020) | 10.1134/S1063776120100039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We developed the parameterized post-Keplerian formalism for hybrid
metric-Palatini $f(R)$-gravity. We obtained analytical expressions in the
generel eccentric case for four PPK parameters: $\dot\omega$, $\dot P_{\rm b}$,
$r$ and $s$. Using observational data of PSR J0737-3039 and PSR J1903+0327 we
imposed restriction... | [
{
"created": "Wed, 23 Sep 2020 14:07:11 GMT",
"version": "v1"
}
] | 2022-10-13 | [
[
"Avdeev",
"N.",
""
],
[
"Dyadina",
"P.",
""
],
[
"Labazova",
"S.",
""
]
] | We developed the parameterized post-Keplerian formalism for hybrid metric-Palatini $f(R)$-gravity. We obtained analytical expressions in the generel eccentric case for four PPK parameters: $\dot\omega$, $\dot P_{\rm b}$, $r$ and $s$. Using observational data of PSR J0737-3039 and PSR J1903+0327 we imposed restrictions ... |
1510.09048 | Satoshi Nakajima | Satoshi Nakajima | Application of covariant analytic mechanics with differential forms to
gravity with Dirac field | 14 pages, no figure | EJTP 13, 95 (2016) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the covariant analytic mechanics with the differential forms to the
Dirac field and the gravity with the Dirac field. The covariant analytic
mechanics treats space and time on an equal footing regarding the differential
forms as the basic variables. A significant feature of the covariant analytic
mechanics i... | [
{
"created": "Fri, 30 Oct 2015 11:12:06 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Feb 2016 14:53:45 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Nakajima",
"Satoshi",
""
]
] | We apply the covariant analytic mechanics with the differential forms to the Dirac field and the gravity with the Dirac field. The covariant analytic mechanics treats space and time on an equal footing regarding the differential forms as the basic variables. A significant feature of the covariant analytic mechanics is ... |
2211.14278 | Adrien Bourgoin | Adrien Bourgoin (1 and 2), Christophe Le Poncin-Lafitte (1),
St\'ephane Mathis (2) and Marie-Christine Angonin (1) ((1) SYRTE,
Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universit\'e,
UPMC Univ. Paris 6, LNE, 61 avenue de l'Observatoire, 75014 Paris, France,
(2) D\'epartement d'Astrophysique... | Gravitational waves radiated by magnetic galactic binaries and detection
by LISA | 4 pages, 1 figure, proceedings Les rencontres de Moriond | null | null | null | gr-qc astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of the future Laser Interferometer Space Antenna (LISA)
mission, galactic binary systems of white dwarfs and neutron stars will
represent the dominant source of Gravitational Waves (GWs) within the
$10^{-4}-10^{-1}\,\mathrm{Hz}$ frequency band. It is expected that LISA will
measure simultaneously, the ... | [
{
"created": "Fri, 25 Nov 2022 18:23:13 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Bourgoin",
"Adrien",
"",
"1 and 2"
],
[
"Poncin-Lafitte",
"Christophe Le",
""
],
[
"Mathis",
"Stéphane",
""
],
[
"Angonin",
"Marie-Christine",
""
]
] | In the context of the future Laser Interferometer Space Antenna (LISA) mission, galactic binary systems of white dwarfs and neutron stars will represent the dominant source of Gravitational Waves (GWs) within the $10^{-4}-10^{-1}\,\mathrm{Hz}$ frequency band. It is expected that LISA will measure simultaneously, the GW... |
1211.6157 | Phil Threlfall | Philip Threlfall and Susan M. Scott | The Monotonicity of the Gravitational Entropy Scalar within Quiescent
Cosmology | 19 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we show that Quiescent Cosmology [1, 2, 3] is consistent with
Penrose's Weyl Curvature Hypothesis and the notion of gravitational entropy
[4]. Gravitational entropy, from a conceptual point of view, acts in an
opposite fashion to the more familiar notion of entropy. A closed system of
gravitating partic... | [
{
"created": "Mon, 26 Nov 2012 23:04:03 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Dec 2012 00:03:20 GMT",
"version": "v2"
}
] | 2012-12-18 | [
[
"Threlfall",
"Philip",
""
],
[
"Scott",
"Susan M.",
""
]
] | In this paper we show that Quiescent Cosmology [1, 2, 3] is consistent with Penrose's Weyl Curvature Hypothesis and the notion of gravitational entropy [4]. Gravitational entropy, from a conceptual point of view, acts in an opposite fashion to the more familiar notion of entropy. A closed system of gravitating particle... |
gr-qc/0703108 | Ezra Newman | Carlos Kozameh and Ezra T. Newman | Asymptotically Shear-free and Twist-free Null Geodesic Congruences | 10 pages | Class.Quant.Grav.24:3085-3090,2007 | 10.1088/0264-9381/24/11/019 | null | gr-qc | null | We show that, though they are rare, there are asymptotically flat space-times
that possess null geodesic congruences that are both asymptotically shear- free
and twist-free (surface forming). In particular, we display the class of
space-times that possess this property and demonstrate how these congruences
can be fou... | [
{
"created": "Wed, 21 Mar 2007 15:59:59 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kozameh",
"Carlos",
""
],
[
"Newman",
"Ezra T.",
""
]
] | We show that, though they are rare, there are asymptotically flat space-times that possess null geodesic congruences that are both asymptotically shear- free and twist-free (surface forming). In particular, we display the class of space-times that possess this property and demonstrate how these congruences can be found... |
1110.2019 | Julian Adamek | Julian Adamek, Claudia de Rham and Ruth Durrer | Mode Spectrum of the Electromagnetic Field in Open Universe Models | 6 pages, 1 figure; v2: minor revision, appendix added, accepted for
publication in MNRAS | Mon.Not.R.Astron.Soc. 423 (2012) 2705-2710 | 10.1111/j.1365-2966.2012.21082.x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the mode functions of the electromagnetic field on spherically
symmetric backgrounds with special attention to the subclass which allows for
the foliation as open Friedmann-Lemaitre (FL) spacetime. It is well-known that
in certain scalar field theories on open FL background there can exist
so-called superc... | [
{
"created": "Mon, 10 Oct 2011 12:08:14 GMT",
"version": "v1"
},
{
"created": "Thu, 3 May 2012 07:56:01 GMT",
"version": "v2"
}
] | 2012-06-21 | [
[
"Adamek",
"Julian",
""
],
[
"de Rham",
"Claudia",
""
],
[
"Durrer",
"Ruth",
""
]
] | We examine the mode functions of the electromagnetic field on spherically symmetric backgrounds with special attention to the subclass which allows for the foliation as open Friedmann-Lemaitre (FL) spacetime. It is well-known that in certain scalar field theories on open FL background there can exist so-called supercur... |
2108.02500 | Reginald Christian Bernardo | Reginald Christian Bernardo, Jackson Levi Said, Maria Caruana, Stephen
Appleby | Well-Tempered Minkowski Solutions in Teleparallel Horndeski Theory | 34 pages, 5 figures, v2: minor revisions, template changed, to appear
in CQG | 2022 Class. Quantum Grav. 39 015013 | 10.1088/1361-6382/ac36e4 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Well-tempering stands among the few classical methods of screening vacuum
energy to deliver a late-time, low energy vacuum state. We build on the class
of Horndeski models that admit a Minkowski vacuum state despite the presence of
an arbitrarily large vacuum energy to obtain a much larger family of models in
telepar... | [
{
"created": "Thu, 5 Aug 2021 10:18:41 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 2021 05:06:38 GMT",
"version": "v2"
}
] | 2021-12-13 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Caruana",
"Maria",
""
],
[
"Appleby",
"Stephen",
""
]
] | Well-tempering stands among the few classical methods of screening vacuum energy to deliver a late-time, low energy vacuum state. We build on the class of Horndeski models that admit a Minkowski vacuum state despite the presence of an arbitrarily large vacuum energy to obtain a much larger family of models in teleparal... |
2105.11430 | Dan A. Lee | Gregory J. Galloway and Dan A. Lee | A note on the positive mass theorem with boundary | 10 pages, Remark 6 from v2 (which is the published version) was
incorrect | Letters in Mathematical Physics, Vol 111, 111 (2021) | 10.1007/s11005-021-01449-3 | null | gr-qc math.DG | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this short note we explain how one can use established results to prove
various versions of the positive mass theorem for initial data sets with
boundary, in dimensions less than 8.
| [
{
"created": "Mon, 24 May 2021 17:39:41 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Aug 2021 16:18:55 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Jan 2022 19:06:04 GMT",
"version": "v3"
}
] | 2022-01-11 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Lee",
"Dan A.",
""
]
] | In this short note we explain how one can use established results to prove various versions of the positive mass theorem for initial data sets with boundary, in dimensions less than 8. |
gr-qc/9704062 | Roman R. Zapatrin | R.R.Zapatrin | Finitary Algebraic Superspace | latex 2.09, no frills | Int.J.Theor.Phys. 37 (1998) 799-816 | null | IBR-MSP-970401 | gr-qc quant-ph | null | An algebraic scheme is suggested in which discretized spacetime turns out to
be a quantum observable. As an example, a toy model producing spacetimes of
four points with different topologies is presented. The possibility of
incorporating this scheme into the framework of non-commutative differential
geometry is discu... | [
{
"created": "Wed, 23 Apr 1997 10:04:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zapatrin",
"R. R.",
""
]
] | An algebraic scheme is suggested in which discretized spacetime turns out to be a quantum observable. As an example, a toy model producing spacetimes of four points with different topologies is presented. The possibility of incorporating this scheme into the framework of non-commutative differential geometry is discuss... |
2303.07371 | Shafaq Elahi | Shafaq Gulzar Elahi and Anupam Mazumdar | Probing massless and massive gravitons via entanglement in a warped
extra dimension | Accepted for publication by Physical Review D ; Matches the journal
version | Physical Review D 108, 035018 (2023) | 10.1103/PhysRevD.108.035018 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity's quantum nature can be probed in a laboratory by witnessing the
entanglement between the two quantum systems, which cannot be possible if
gravity is a classical entity. In this paper, we will provide a simple example
where we can probe the effects of higher dimensions, in particular, the warped
extra dimensi... | [
{
"created": "Mon, 13 Mar 2023 18:00:04 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2023 18:00:11 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Jul 2023 17:51:42 GMT",
"version": "v3"
}
] | 2023-10-26 | [
[
"Elahi",
"Shafaq Gulzar",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | Gravity's quantum nature can be probed in a laboratory by witnessing the entanglement between the two quantum systems, which cannot be possible if gravity is a classical entity. In this paper, we will provide a simple example where we can probe the effects of higher dimensions, in particular, the warped extra dimension... |
0705.0006 | Mauricio Mondragon | Mauricio Mondragon, Alejandro Perez, Carlo Rovelli | Multiple-event probability in general-relativistic quantum mechanics: a
discrete model | null | Phys.Rev.D76:064005,2007 | 10.1103/PhysRevD.76.064005 | null | gr-qc | null | We introduce a simple quantum mechanical model in which time and space are
discrete and periodic. These features avoid the complications related to
continuous-spectrum operators and infinite-norm states. The model provides a
tool for discussing the probabilistic interpretation of generally-covariant
quantum systems, ... | [
{
"created": "Mon, 30 Apr 2007 20:07:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mondragon",
"Mauricio",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We introduce a simple quantum mechanical model in which time and space are discrete and periodic. These features avoid the complications related to continuous-spectrum operators and infinite-norm states. The model provides a tool for discussing the probabilistic interpretation of generally-covariant quantum systems, wi... |
1906.11824 | Nikodem Poplawski | Jordan L. Cubero, Nikodem J. Pop{\l}awski | Analysis of big bounce in Einstein--Cartan cosmology | 5 pages, 3 tables, 2 figures | Class. Quantum Grav. 37, 025011 (2020) | 10.1088/1361-6382/ab5cb9 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the dynamics of a homogeneous and isotropic universe in the
Einstein--Cartan theory of gravity. The spin of fermions produces spacetime
torsion that prevents gravitational singularities and replaces the big bang
with a nonsingular big bounce. We show that a closed universe exists only when
a particular fun... | [
{
"created": "Thu, 27 Jun 2019 17:59:55 GMT",
"version": "v1"
}
] | 2019-12-30 | [
[
"Cubero",
"Jordan L.",
""
],
[
"Popławski",
"Nikodem J.",
""
]
] | We analyze the dynamics of a homogeneous and isotropic universe in the Einstein--Cartan theory of gravity. The spin of fermions produces spacetime torsion that prevents gravitational singularities and replaces the big bang with a nonsingular big bounce. We show that a closed universe exists only when a particular funct... |
1605.03405 | Rampei Kimura | Rampei Kimura, Takahiro Tanaka, Kazuhiro Yamamoto, Yasuho Yamashita | Constraint on ghost-free bigravity from gravitational Cherenkov
radiation | 13 pages, 2 figures; v2 | Phys. Rev. D 94, 064059 (2016) | 10.1103/PhysRevD.94.064059 | YITP-16-60, KUNS-2626 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate gravitational Cherenkov radiation in a healthy branch of
background solutions in the ghost-free bigravity model. In this model, because
of the modification of dispersion relations, each polarization mode can possess
subluminal phase velocities, and the gravitational Cherenkov radiation could be
potenti... | [
{
"created": "Tue, 10 May 2016 08:05:21 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Sep 2016 04:50:35 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"Kimura",
"Rampei",
""
],
[
"Tanaka",
"Takahiro",
""
],
[
"Yamamoto",
"Kazuhiro",
""
],
[
"Yamashita",
"Yasuho",
""
]
] | We investigate gravitational Cherenkov radiation in a healthy branch of background solutions in the ghost-free bigravity model. In this model, because of the modification of dispersion relations, each polarization mode can possess subluminal phase velocities, and the gravitational Cherenkov radiation could be potential... |
2201.03959 | Davide Astesiano | Davide Astesiano | Rigid rotation in GR and a generalization of the virial theorem | 17 pages, 0 figures | null | 10.1007/s10714-022-02947-y | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | In this work we study the properties of rigidly rotating neutral dust
solutions in general relativity. This class of solutions gained relevance
recently due to applications to the dynamics of spiral galaxies. We show that
this class could be interpreted as a rigid body in general relativity and we
analyze the differe... | [
{
"created": "Tue, 11 Jan 2022 14:12:46 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2022 11:29:29 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Jun 2022 08:11:09 GMT",
"version": "v3"
}
] | 2022-07-06 | [
[
"Astesiano",
"Davide",
""
]
] | In this work we study the properties of rigidly rotating neutral dust solutions in general relativity. This class of solutions gained relevance recently due to applications to the dynamics of spiral galaxies. We show that this class could be interpreted as a rigid body in general relativity and we analyze the different... |
2305.05541 | Ghulam Abbas | G. Abbas and R. H. Ali | Thermal fluctuations, quasi-normal modes and phase transition of the
charged AdS black hole with perfect fluid dark matter | 31 Pages, 41 EPS figure, accepted for Publication in EPJC | null | 10.1140/epjc/s10052-023-11580-1 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study thermodynamics, thermal fluctuations, phase
transitions and the charged anti-de Sitter black hole surrounded by perfect
fluid dark matter. Large black holes are shown to be stable when subject to
thermal fluctuations, and we begin by exploring how these fluctuations affect
the uncorrected ther... | [
{
"created": "Sat, 6 May 2023 10:15:12 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Abbas",
"G.",
""
],
[
"Ali",
"R. H.",
""
]
] | In this paper, we study thermodynamics, thermal fluctuations, phase transitions and the charged anti-de Sitter black hole surrounded by perfect fluid dark matter. Large black holes are shown to be stable when subject to thermal fluctuations, and we begin by exploring how these fluctuations affect the uncorrected thermo... |
2312.06590 | Alejandro C\'ardenas-Avenda\~no | Alejandro C\'ardenas-Avenda\~no and Aaron Held | A Lensing-Band Approach to Spacetime Constraints | 16 pages, 9 figures + 4 appendices and references. V2: Minor changes
to match the published version | Phys. Rev. D 109, 064052 (2024) | 10.1103/PhysRevD.109.064052 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | General relativity's prediction that all black holes are described by the
Kerr metric, irrespective of their size, can now be empirically tested using
electromagnetic observations of supermassive black holes and gravitational
waves from mergers of stellar-mass black holes. In this work, we focus on the
electromagneti... | [
{
"created": "Mon, 11 Dec 2023 18:27:05 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Mar 2024 15:17:41 GMT",
"version": "v2"
}
] | 2024-03-20 | [
[
"Cárdenas-Avendaño",
"Alejandro",
""
],
[
"Held",
"Aaron",
""
]
] | General relativity's prediction that all black holes are described by the Kerr metric, irrespective of their size, can now be empirically tested using electromagnetic observations of supermassive black holes and gravitational waves from mergers of stellar-mass black holes. In this work, we focus on the electromagnetic ... |
1411.3583 | Prabir Rudra | Prabir Rudra (Indian Instt. of Engg. Sci. and tech., Pailan colg. of
Mgmt. and tech.) | Towards a possible solution for the coincidence problem: f(G) gravity as
background | 10 pages, 5 figures (Accepted for publication in Int. J. Mod. Phys.
D.). arXiv admin note: substantial text overlap with arXiv:1410.6710 | null | 10.1142/S0218271815500133 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we address the well-known cosmic coincidence problem in the
framework of the f(G) gravity. In order to achieve this, an interaction between
dark energy and dark matter is considered. A set-up is designed and a
constraint equation is obtained which generates the f(G) models that do not
suffer from the ... | [
{
"created": "Tue, 11 Nov 2014 06:30:45 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Rudra",
"Prabir",
"",
"Indian Instt. of Engg. Sci. and tech., Pailan colg. of\n Mgmt. and tech."
]
] | In this article we address the well-known cosmic coincidence problem in the framework of the f(G) gravity. In order to achieve this, an interaction between dark energy and dark matter is considered. A set-up is designed and a constraint equation is obtained which generates the f(G) models that do not suffer from the co... |
1803.10719 | Katy Clough Dr | Katy Clough, Jens C. Niemeyer | On the difficulty of generating gravitational wave turbulence in the
early universe | 4 pages | null | 10.1088/1361-6382/aad7f0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent article by Galtier and Nazarenko [1] proposed that weakly nonlinear
gravitational waves could result in a turbulent cascade, with energy flowing
from high to low frequency modes or vice versa. This is an interesting
proposition for early universe cosmology because it could suggest some
"natural" initial cond... | [
{
"created": "Wed, 28 Mar 2018 16:40:44 GMT",
"version": "v1"
}
] | 2018-08-29 | [
[
"Clough",
"Katy",
""
],
[
"Niemeyer",
"Jens C.",
""
]
] | A recent article by Galtier and Nazarenko [1] proposed that weakly nonlinear gravitational waves could result in a turbulent cascade, with energy flowing from high to low frequency modes or vice versa. This is an interesting proposition for early universe cosmology because it could suggest some "natural" initial condit... |
gr-qc/0408066 | Ishai Ben-Dov | Ishai Ben-Dov | The Penrose inequality and apparent horizons | 24 pages, 6 figures, revised for publication; revised section 6,
added footnote no. 16, typos corrected | Phys.Rev. D70 (2004) 124031 | 10.1103/PhysRevD.70.124031 | null | gr-qc | null | A spherically symmetric spacetime is presented with an initial data set that
is asymptotically flat, satisfies the dominant energy condition, and such that
on this initial data $M<\sqrt{A/16\pi}$, where M is the total (ADM) mass and A
is the area of the apparent horizon. This provides a counterexample to a
commonly s... | [
{
"created": "Thu, 19 Aug 2004 19:56:14 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2005 17:37:20 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ben-Dov",
"Ishai",
""
]
] | A spherically symmetric spacetime is presented with an initial data set that is asymptotically flat, satisfies the dominant energy condition, and such that on this initial data $M<\sqrt{A/16\pi}$, where M is the total (ADM) mass and A is the area of the apparent horizon. This provides a counterexample to a commonly sta... |
gr-qc/0308068 | Wataru Hikida | Wataru Hikida, Sanjay Jhingan, Hiroyuki Nakano, Norichika Sago, Misao
Sasaki, Takahiro Tanaka | A new analytical method for self-force regularization I. scalar charged
particle in Schwarzschild spacetime | 17 pages, no figure | Prog.Theor.Phys.111:821-840,2004 | 10.1143/PTP.111.821 | YITP-03-58,OCU-PHYS-204,AP-GR-13,KUNS-1866,OU-TAP-218 | gr-qc | null | We formulate a new analytical method for regularizing the self-force acting
on a particle of small mass $\mu$ orbiting a black hole of mass $M$, where
$\mu\ll M$. At first order in $\mu$, the geometry is perturbed and the motion
of the particle is affected by its self-force. The self-force, however,
diverges at the l... | [
{
"created": "Thu, 21 Aug 2003 13:44:45 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Aug 2003 17:26:35 GMT",
"version": "v2"
},
{
"created": "Thu, 27 May 2004 05:09:53 GMT",
"version": "v3"
}
] | 2009-10-09 | [
[
"Hikida",
"Wataru",
""
],
[
"Jhingan",
"Sanjay",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Sago",
"Norichika",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We formulate a new analytical method for regularizing the self-force acting on a particle of small mass $\mu$ orbiting a black hole of mass $M$, where $\mu\ll M$. At first order in $\mu$, the geometry is perturbed and the motion of the particle is affected by its self-force. The self-force, however, diverges at the loc... |
2111.05441 | Charis Anastopoulos | Charis Anastopoulos, Miles Blencowe and Bei-Lok Hu | Gravitational Decoherence in Deep Space Experiments | 7 pages. A white paper contribution to the Decadal Survey on
Biological and Physical Sciences (BPS) Research in Space 2023-2032 (BPS2023)
conducted by The National Academies of Sciences, Engineering and Medicine.
arXiv admin note: text overlap with arXiv:2111.02462 | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | Among the many worthwhile quantum experiments taking advantage of long
baselines in space, this white paper points to the far-reaching significance of
gravitational decoherence experiments. These experiments can provide clues as
to whether gravity is of a fundamental or an effective nature. They can also
discriminate... | [
{
"created": "Tue, 9 Nov 2021 22:44:15 GMT",
"version": "v1"
}
] | 2021-11-11 | [
[
"Anastopoulos",
"Charis",
""
],
[
"Blencowe",
"Miles",
""
],
[
"Hu",
"Bei-Lok",
""
]
] | Among the many worthwhile quantum experiments taking advantage of long baselines in space, this white paper points to the far-reaching significance of gravitational decoherence experiments. These experiments can provide clues as to whether gravity is of a fundamental or an effective nature. They can also discriminate b... |
gr-qc/0401047 | Kofinas Georgios | G. Kofinas and E. Papantonopoulos | Gravitational collapse in braneworld models with curvature corrections | References added | JCAP 0412 (2004) 011 | 10.1088/1475-7516/2004/12/011 | null | gr-qc astro-ph hep-th | null | We study the collapse of a homogeneous braneworld dust cloud in the context
of the various curvature correction scenarios, namely, the induced-gravity, the
Gauss-Bonnet, and the combined induced-gravity and Gauss-Bonnet. In accordance
to the Randall-Sundrum model, and contrary to four-dimensional general
relativity, ... | [
{
"created": "Mon, 12 Jan 2004 01:59:35 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2004 22:27:43 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Kofinas",
"G.",
""
],
[
"Papantonopoulos",
"E.",
""
]
] | We study the collapse of a homogeneous braneworld dust cloud in the context of the various curvature correction scenarios, namely, the induced-gravity, the Gauss-Bonnet, and the combined induced-gravity and Gauss-Bonnet. In accordance to the Randall-Sundrum model, and contrary to four-dimensional general relativity, we... |
gr-qc/0107086 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | Space-time quantum solves three experimental paradoxes | LaTex, 9 pages. Typos corrected (in the version submitted yesterday
there was one type in equation and a couple of spelling typos). All aspects
of the analysis remain unchanged | Phys.Lett. B528 (2002) 181-187 | 10.1016/S0370-2693(02)01223-6 | null | gr-qc | null | I show that a Planck-scale deformation of the relativistic dispersion
relation, which has been independently considered in the quantum-gravity
literature, can explain the surprising results of three classes of experiments:
(1) observations of cosmic rays above the expected GZK limit, (2) observations
of multi-TeV pho... | [
{
"created": "Thu, 26 Jul 2001 17:42:26 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jul 2001 12:27:05 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | I show that a Planck-scale deformation of the relativistic dispersion relation, which has been independently considered in the quantum-gravity literature, can explain the surprising results of three classes of experiments: (1) observations of cosmic rays above the expected GZK limit, (2) observations of multi-TeV photo... |
1410.4567 | Shahar Hod | Shahar Hod | Resonance spectra of caged black holes | 5 pages | The European Physical Journal C 74, 3137 (2014) | 10.1140/epjc/s10052-014-3137-3 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent numerical studies of the coupled Einstein-Klein-Gordon system in a
cavity have provided compelling evidence that {\it confined} scalar fields
generically collapse to form black holes. Motivated by this intriguing
discovery, we here use analytical tools in order to study the characteristic
resonance spectra of ... | [
{
"created": "Thu, 16 Oct 2014 20:00:11 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Hod",
"Shahar",
""
]
] | Recent numerical studies of the coupled Einstein-Klein-Gordon system in a cavity have provided compelling evidence that {\it confined} scalar fields generically collapse to form black holes. Motivated by this intriguing discovery, we here use analytical tools in order to study the characteristic resonance spectra of th... |
gr-qc/0506006 | Valery Kiselev | V.V.Kiselev | Quantum black hole and Hawking radiation at microscopic magnifying | 14 pages, iopart class, 8 eps-figures | null | null | null | gr-qc astro-ph hep-th | null | We establish a state of stopping the Hawking radiation by quantum
Schwarzschild black hole in the framework of quasi-classical thermal
quantization for particles behind the horizon. The mechanism of absorption and
radiation by the black hole is presented.
| [
{
"created": "Wed, 1 Jun 2005 06:37:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kiselev",
"V. V.",
""
]
] | We establish a state of stopping the Hawking radiation by quantum Schwarzschild black hole in the framework of quasi-classical thermal quantization for particles behind the horizon. The mechanism of absorption and radiation by the black hole is presented. |
1402.3009 | Edward Wilson-Ewing | Yi-Fu Cai, Edward Wilson-Ewing | Non-singular bounce scenarios in loop quantum cosmology and the
effective field description | 12 pages, 5 figures, v2: references added | JCAP03(2014)026 | 10.1088/1475-7516/2014/03/026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A non-singular bouncing cosmology is generically obtained in loop quantum
cosmology due to non-perturbative quantum gravity effects. A similar picture
can be achieved in standard general relativity in the presence of a scalar
field with a non-standard kinetic term such that at high energy densities the
field evolves ... | [
{
"created": "Thu, 13 Feb 2014 00:03:07 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Mar 2014 19:25:02 GMT",
"version": "v2"
}
] | 2014-03-17 | [
[
"Cai",
"Yi-Fu",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | A non-singular bouncing cosmology is generically obtained in loop quantum cosmology due to non-perturbative quantum gravity effects. A similar picture can be achieved in standard general relativity in the presence of a scalar field with a non-standard kinetic term such that at high energy densities the field evolves in... |
1305.0025 | Christian Boehmer | Christian G. Boehmer, Francisco S. N. Lobo, Nicola Tamanini | Einstein static Universe in hybrid metric-Palatini gravity | 10 pages, 6 figures; v2 added inhomogeneous perturbations | Phys. Rev. D 88, 104019 (2013) | 10.1103/PhysRevD.88.104019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hybrid metric-Palatini gravity is a recent and novel approach to modified
theories of gravity, which consists of adding to the metric Einstein-Hilbert
Lagrangian an f(R) term constructed a la Palatini. It was shown that the theory
passes local tests even if the scalar field is very light, and thus implies the
existen... | [
{
"created": "Tue, 30 Apr 2013 20:51:32 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Feb 2015 13:35:25 GMT",
"version": "v2"
}
] | 2015-02-19 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Tamanini",
"Nicola",
""
]
] | Hybrid metric-Palatini gravity is a recent and novel approach to modified theories of gravity, which consists of adding to the metric Einstein-Hilbert Lagrangian an f(R) term constructed a la Palatini. It was shown that the theory passes local tests even if the scalar field is very light, and thus implies the existence... |
2212.09346 | Dicong Liang | Dicong Liang, Rui Xu, Zhan-Feng Mai, Lijing Shao | Probing vector hair of black holes with extreme mass ratio inspirals | 8 pages, 4 figures | Phys. Rev. D 107 (2023) 044053 | 10.1103/PhysRevD.107.044053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The bumblebee gravity model, with a vector field nonminimally coupled to
gravity, is a natural extension of the Einstein-Maxwell theory. In this theory,
a black hole can carry a vector hair, making the metric deviate from the
Schwarzschild metric. To investigate the detectability of the vector hair, we
consider an Ex... | [
{
"created": "Mon, 19 Dec 2022 10:23:37 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2023 01:52:30 GMT",
"version": "v2"
}
] | 2023-02-24 | [
[
"Liang",
"Dicong",
""
],
[
"Xu",
"Rui",
""
],
[
"Mai",
"Zhan-Feng",
""
],
[
"Shao",
"Lijing",
""
]
] | The bumblebee gravity model, with a vector field nonminimally coupled to gravity, is a natural extension of the Einstein-Maxwell theory. In this theory, a black hole can carry a vector hair, making the metric deviate from the Schwarzschild metric. To investigate the detectability of the vector hair, we consider an Extr... |
1007.1411 | Anil Yadav dr | Anil Kumar Yadav, Lallan Yadav | Bianchi Type III Anisotropic Dark Energy Models with Constant
Deceleration Parameter | 12 pages, 2 figures, Accepted version of IJTP | Int.J.Theor.Phys.50:218-227,2011 | 10.1007/s10773-010-0510-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bianchi type III dark energy models with constant deceleration parameter
are investigated. The equation of state parameter $\omega$ is found to be time
dependent and its existing range for this model is consistent with the recent
observations of SN Ia data, SN Ia data (with CMBR anisotropy) and galaxy
clustering ... | [
{
"created": "Thu, 8 Jul 2010 16:11:02 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Jul 2010 13:41:36 GMT",
"version": "v2"
},
{
"created": "Sat, 2 Oct 2010 04:42:42 GMT",
"version": "v3"
}
] | 2011-01-05 | [
[
"Yadav",
"Anil Kumar",
""
],
[
"Yadav",
"Lallan",
""
]
] | The Bianchi type III dark energy models with constant deceleration parameter are investigated. The equation of state parameter $\omega$ is found to be time dependent and its existing range for this model is consistent with the recent observations of SN Ia data, SN Ia data (with CMBR anisotropy) and galaxy clustering st... |
1909.13007 | Wen Zhao | Wen Zhao, Tan Liu, Linqing Wen, Tao Zhu, Anzhong Wang, Qian Hu, Cong
Zhou | Model-independent test of the parity symmetry of gravity with
gravitational waves | 9 pages,4 figs, EPJC accepted | EPJC 80, 630 (2020) | 10.1140/epjc/s10052-020-8211-4 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave (GW) data can be used to test the parity symmetry of
gravity by investigating the difference between left-hand and right-hand
circular polarization modes. In this article, we develop a method to decompose
the circular polarizations of GWs produced during the inspiralling stage of
compact binaries, ... | [
{
"created": "Sat, 28 Sep 2019 02:35:54 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 01:00:01 GMT",
"version": "v2"
}
] | 2020-07-21 | [
[
"Zhao",
"Wen",
""
],
[
"Liu",
"Tan",
""
],
[
"Wen",
"Linqing",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Hu",
"Qian",
""
],
[
"Zhou",
"Cong",
""
]
] | Gravitational wave (GW) data can be used to test the parity symmetry of gravity by investigating the difference between left-hand and right-hand circular polarization modes. In this article, we develop a method to decompose the circular polarizations of GWs produced during the inspiralling stage of compact binaries, wi... |
2312.12702 | Hongsheng Zhang | Chunmei Liu, Hongsheng Zhang | Black Holes and Non-perturbative Gravitational Waves in $f(R)$ Gravity | 13 pages | Eur. Phys. J. C (2023) 83:1096 | 10.1140/epjc/s10052-023-12261-9 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Exact solutions of spherically symmetric black hole and gravitational wave
are explored in $f(R)$ gravity in arbitrary dimension. We find two exact
solutions for the radiation and absorption of null dust. In the framework of
general relativity, the Birkhoff theorem strictly forbids the existence of
spherical gravitat... | [
{
"created": "Wed, 20 Dec 2023 01:58:43 GMT",
"version": "v1"
}
] | 2023-12-21 | [
[
"Liu",
"Chunmei",
""
],
[
"Zhang",
"Hongsheng",
""
]
] | Exact solutions of spherically symmetric black hole and gravitational wave are explored in $f(R)$ gravity in arbitrary dimension. We find two exact solutions for the radiation and absorption of null dust. In the framework of general relativity, the Birkhoff theorem strictly forbids the existence of spherical gravitatio... |
2207.10658 | Qiu Shi Wang | Qiu Shi Wang | Local Dirac energy decay in the 5D Myers-Perry geometry using an
integral spectral representation for the Dirac propagator | Minor corrections and improvements, published version, 15 pages | Classical and Quantum Gravity 39 (2022), no. 23, 235016 | 10.1088/1361-6382/ac9f9f | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We consider the massive Dirac equation in the exterior region of the
5-dimensional Myers-Perry black hole. Using the resulting ODEs obtained from
the separation of variables of the Dirac equation, we construct an integral
spectral representation for the solution of the Cauchy problem with compactly
supported smooth i... | [
{
"created": "Thu, 21 Jul 2022 17:53:26 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jul 2022 14:43:04 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Nov 2022 15:16:18 GMT",
"version": "v3"
}
] | 2022-11-22 | [
[
"Wang",
"Qiu Shi",
""
]
] | We consider the massive Dirac equation in the exterior region of the 5-dimensional Myers-Perry black hole. Using the resulting ODEs obtained from the separation of variables of the Dirac equation, we construct an integral spectral representation for the solution of the Cauchy problem with compactly supported smooth ini... |
2404.19012 | Giulia Ventagli | Giulia Ventagli, Pedro G. S. Fernandes, Andrea Maselli, Antonio
Padilla, Thomas P. Sotiriou | Neutron stars and the cosmological constant problem | 21 pages, 15 figures | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Phase transitions can play an important role in the cosmological constant
problem, allowing the underlying vacuum energy, and therefore the value of the
cosmological constant, to change. Deep within the core of neutron stars, the
local pressure may be sufficiently high to trigger the QCD phase transition,
thus genera... | [
{
"created": "Mon, 29 Apr 2024 18:00:14 GMT",
"version": "v1"
}
] | 2024-05-01 | [
[
"Ventagli",
"Giulia",
""
],
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Padilla",
"Antonio",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | Phase transitions can play an important role in the cosmological constant problem, allowing the underlying vacuum energy, and therefore the value of the cosmological constant, to change. Deep within the core of neutron stars, the local pressure may be sufficiently high to trigger the QCD phase transition, thus generati... |
gr-qc/9701037 | Alexander Zhuk | A.Zhuk | Multidimensional Topological Foam | 10 pages, latex, submitted to Gravitation and Cosmology | Grav.Cosmol. 3 (1997) 24-28 | null | FUB HEP/12-96 | gr-qc | null | Multidimensional cosmological model with the topology M=RxM_1xM_2x...xM_n
where M_i (i=1,... ,n) undergo a chain splitting into arbitrary number of
compact spaces is considered. It is shown that equations of motion can be
solved exactly because they depend only on the effective curvatures and
dimensions and "forget" ... | [
{
"created": "Wed, 15 Jan 1997 21:18:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zhuk",
"A.",
""
]
] | Multidimensional cosmological model with the topology M=RxM_1xM_2x...xM_n where M_i (i=1,... ,n) undergo a chain splitting into arbitrary number of compact spaces is considered. It is shown that equations of motion can be solved exactly because they depend only on the effective curvatures and dimensions and "forget" ab... |
2304.03819 | Arad Nasiri | Santanu Das, Arad Nasiri, Yasaman K. Yazdi | Aspects of Everpresent $\Lambda$ (I): A Fluctuating Cosmological
Constant from Spacetime Discreteness | 28 pages, 10 figures | JCAP10(2023)047 | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a comprehensive discussion of the Everpresent $\Lambda$
cosmological model arising from fundamental principles in causal set theory and
unimodular gravity. In this framework the value of the cosmological constant
($\Lambda$) fluctuates, in magnitude and in sign, over cosmic history. At each
epoch, $\Lambda... | [
{
"created": "Fri, 7 Apr 2023 19:07:42 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Feb 2024 21:05:40 GMT",
"version": "v2"
}
] | 2024-02-22 | [
[
"Das",
"Santanu",
""
],
[
"Nasiri",
"Arad",
""
],
[
"Yazdi",
"Yasaman K.",
""
]
] | We provide a comprehensive discussion of the Everpresent $\Lambda$ cosmological model arising from fundamental principles in causal set theory and unimodular gravity. In this framework the value of the cosmological constant ($\Lambda$) fluctuates, in magnitude and in sign, over cosmic history. At each epoch, $\Lambda$ ... |
1411.3623 | Babak Vakili | B. Malekolkalami, K. Atazadeh and B. Vakili | Late time acceleration in a non-commutative model of modified cosmology | 9 pages, no figures, typos corrected | Phys. Lett. B 739 (2014) 400 | 10.1016/j.physletb.2014.11.003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects of noncommutativity between the position-position,
position-momentum and momentum-momentum of a phase space corresponding to a
modified cosmological model. We show that the existence of such
noncommutativity results in a Moyal Poisson algebra between the phase space
variables in which the p... | [
{
"created": "Thu, 13 Nov 2014 17:31:14 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Nov 2014 15:49:38 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Malekolkalami",
"B.",
""
],
[
"Atazadeh",
"K.",
""
],
[
"Vakili",
"B.",
""
]
] | We investigate the effects of noncommutativity between the position-position, position-momentum and momentum-momentum of a phase space corresponding to a modified cosmological model. We show that the existence of such noncommutativity results in a Moyal Poisson algebra between the phase space variables in which the pro... |
gr-qc/9708052 | Eduardo Gueron | Eduardo Gu\'eron and P.S. Letelier | Textures and Newtonian Gravity | 4 pages, 4 ps figures, REVTEX, accepted for publication in PRD | Phys.Rev.D56:5272-5275,1997 | 10.1103/PhysRevD.56.5272 | null | gr-qc | null | Newtonian theory is used to study the gravitational effects of a texture, in
particular the formation of massive structures.
| [
{
"created": "Thu, 21 Aug 1997 20:42:45 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Guéron",
"Eduardo",
""
],
[
"Letelier",
"P. S.",
""
]
] | Newtonian theory is used to study the gravitational effects of a texture, in particular the formation of massive structures. |
2307.10966 | Marco de Cesare | Marco de Cesare, Giulia Gubitosi | Cosmological evolution from modified Bekenstein entropy law | 14 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of the homogeneous and isotropic cosmological
background in the recently proposed ``quantum phenomenological gravitational
dynamics'', characterised by logarithmic corrections to the Bekenstein entropy.
We show that the model admits a family of solutions that are self-accelerating
both at early ... | [
{
"created": "Thu, 20 Jul 2023 15:50:51 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"de Cesare",
"Marco",
""
],
[
"Gubitosi",
"Giulia",
""
]
] | We study the dynamics of the homogeneous and isotropic cosmological background in the recently proposed ``quantum phenomenological gravitational dynamics'', characterised by logarithmic corrections to the Bekenstein entropy. We show that the model admits a family of solutions that are self-accelerating both at early an... |
1804.02182 | Satadal Datta | Satadal Datta | Acoustic Analogue of Gravitational Wave | null | Phys. Rev. D 98, 064049 (2018) | 10.1103/PhysRevD.98.064049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore nonlinear perturbations in different static fluid systems. We find
that the equations, corresponding to the perturbation of the integrals of
motion, i.e; Bernoulli's constant and the mass flow rate, satisfy massless
scalar field equation in a time dependent acoustic metric. When one is
interested up to the... | [
{
"created": "Fri, 6 Apr 2018 10:02:15 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2018 20:07:28 GMT",
"version": "v2"
}
] | 2018-10-03 | [
[
"Datta",
"Satadal",
""
]
] | We explore nonlinear perturbations in different static fluid systems. We find that the equations, corresponding to the perturbation of the integrals of motion, i.e; Bernoulli's constant and the mass flow rate, satisfy massless scalar field equation in a time dependent acoustic metric. When one is interested up to the s... |
2405.12671 | Etera R. Livine | Etera R. Livine, Clara Montagnon, Naritaka Oshita, Hugo Roussille | Scalar Quasi-Normal Modes of a Loop Quantum Black Hole | 29 pages; auxiliary mathematica notebook
QNM_recursion_coefficients.nb with explicit QNM recursion relation
coefficients | null | null | YITP-24-58, RIKEN-iTHEMS-Report-24 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the Quasi-Normal Mode (QNM) frequencies for scalar perturbations
for modified Schwarzschild black holes in Loop Quantum Gravity. We study the
singularity-free polymerized metric characterised by two parameters encoding
loop quantum effects: the minimal area gap $a_0$ and the polymeric deformation
parameter... | [
{
"created": "Tue, 21 May 2024 10:42:04 GMT",
"version": "v1"
}
] | 2024-05-22 | [
[
"Livine",
"Etera R.",
""
],
[
"Montagnon",
"Clara",
""
],
[
"Oshita",
"Naritaka",
""
],
[
"Roussille",
"Hugo",
""
]
] | We compute the Quasi-Normal Mode (QNM) frequencies for scalar perturbations for modified Schwarzschild black holes in Loop Quantum Gravity. We study the singularity-free polymerized metric characterised by two parameters encoding loop quantum effects: the minimal area gap $a_0$ and the polymeric deformation parameter $... |
1204.1291 | Carlos Molina Mendes | C. Molina and J. C. S. Neves | Wormholes in de Sitter branes | 10 pages, 7 figures | Physical Review D 86, 024015 (2012) | 10.1103/PhysRevD.86.024015 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a class of geometries which describes wormholes in a
Randall-Sundrum brane model, focusing on de Sitter backgrounds. Maximal
extensions of the solutions are constructed and their causal structures are
discussed. A perturbative analysis is developed, where matter and gravitational
perturbations... | [
{
"created": "Thu, 5 Apr 2012 18:02:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Aug 2012 22:30:28 GMT",
"version": "v2"
}
] | 2012-08-06 | [
[
"Molina",
"C.",
""
],
[
"Neves",
"J. C. S.",
""
]
] | In this work we present a class of geometries which describes wormholes in a Randall-Sundrum brane model, focusing on de Sitter backgrounds. Maximal extensions of the solutions are constructed and their causal structures are discussed. A perturbative analysis is developed, where matter and gravitational perturbations a... |
1805.09667 | David Benisty | David Benisty, Eduardo I. Guendelman | A correspondence between $1^{st}$ and $2^{nd}$ order formalism by a
metricity constraint | 5 pages. Accepted for publication in Phys Rev D | Phys. Rev. D 98, 044023 (2018) | 10.1103/PhysRevD.98.044023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A way to obtain a correspondence between the first order and second order
formalism is studied. By introducing a Lagrange multiplier coupled to the
covariant derivative of the metric, a metricity constraint is implemented. The
new contributions which comes from the variation of the Lagrange multiplier
transforms the ... | [
{
"created": "Thu, 24 May 2018 13:48:16 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jun 2018 18:18:28 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Aug 2018 19:09:45 GMT",
"version": "v3"
}
] | 2018-08-22 | [
[
"Benisty",
"David",
""
],
[
"Guendelman",
"Eduardo I.",
""
]
] | A way to obtain a correspondence between the first order and second order formalism is studied. By introducing a Lagrange multiplier coupled to the covariant derivative of the metric, a metricity constraint is implemented. The new contributions which comes from the variation of the Lagrange multiplier transforms the fi... |
2011.06276 | Nobuyoshi Komatsu | Nobuyoshi Komatsu | Evolution of dissipative and non-dissipative universes in holographic
cosmological models with a power-law term | Final version accepted for publication in PRD. A typo is corrected.
[17 pages, 8 figures] | Phys. Rev. D 103, 023534 (2021) | 10.1103/PhysRevD.103.023534 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Density perturbations related to structure formations are expected to be
different in dissipative and non-dissipative universes, even if the background
evolution of the two universes is the same. To clarify the difference between
the two universes, first-order density perturbations are studied, using two
types of hol... | [
{
"created": "Thu, 12 Nov 2020 09:27:03 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jan 2021 23:25:30 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jan 2021 23:23:42 GMT",
"version": "v3"
}
] | 2021-01-27 | [
[
"Komatsu",
"Nobuyoshi",
""
]
] | Density perturbations related to structure formations are expected to be different in dissipative and non-dissipative universes, even if the background evolution of the two universes is the same. To clarify the difference between the two universes, first-order density perturbations are studied, using two types of holog... |
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