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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1406.4556 | S. Gwynne Crowder | The LIGO Scientific Collaboration and the Virgo Collaboration: J.
Aasi, B. P. Abbott, R. Abbott, T. Abbott, M. R. Abernathy, T. Accadia, F.
Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, C.
Affeldt, M. Agathos, N. Aggarwal, O. D. Aguiar, A. Ain, P. Ajith, A. Alemic,
B. Allen, A. Allocca, D... | Improved Upper Limits on the Stochastic Gravitational-Wave Background
from 2009-2010 LIGO and Virgo Data | 11 pages, 2 figures, 1 table | Phys. Rev. Lett. 113, 231101 (2014) | 10.1103/PhysRevLett.113.231101 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from a variety of sources are predicted to superpose to
create a stochastic background. This background is expected to contain unique
information from throughout the history of the universe that is unavailable
through standard electromagnetic observations, making its study of fundamental
importanc... | [
{
"created": "Tue, 17 Jun 2014 23:38:48 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Aug 2014 23:28:45 GMT",
"version": "v2"
}
] | 2014-12-10 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Aasi",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
],
[
"Abernathy",
"M. R.",
... | Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance ... |
2210.17112 | Hiroki Asami | Hiroki Asami, Chul-Moon Yoo, Ryo Kitaku and Keiya Uemichi | Einstein-Vlasov system with equal-angular momenta in $\text{AdS}_5$ | 21 pages | null | 10.1103/PhysRevD.107.064022 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We investigate solutions of the $5$--dimensional rotating Einstein-Vlasov
system with an $R \times SU(2) \times U(1)$ isometry group. In a
five-dimensional spacetime, there are two independent planes of rotation, thus,
considering $U(1)$ symmetry on each rotation plane, we may impose an $R\times
U(1) \times U(1)$ iso... | [
{
"created": "Mon, 31 Oct 2022 07:36:59 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Mar 2023 05:16:38 GMT",
"version": "v2"
}
] | 2023-03-14 | [
[
"Asami",
"Hiroki",
""
],
[
"Yoo",
"Chul-Moon",
""
],
[
"Kitaku",
"Ryo",
""
],
[
"Uemichi",
"Keiya",
""
]
] | We investigate solutions of the $5$--dimensional rotating Einstein-Vlasov system with an $R \times SU(2) \times U(1)$ isometry group. In a five-dimensional spacetime, there are two independent planes of rotation, thus, considering $U(1)$ symmetry on each rotation plane, we may impose an $R\times U(1) \times U(1)$ isome... |
gr-qc/0108031 | Jose Socorro Garcia Diaz | J. Socorro | Supersymmetric quantum solution for FRW cosmological model with matter | 9 pages, Revtex, Submitted to Rev. Mex. Fis | Rev.Mex.Fis. 48 (2002) 112-117 | null | IFUG-01-25 | gr-qc | null | Using technique of supersymmetric quantum mechanics we present new
cosmological quantum solution, in the regime for FRW cosmological model using a
barotropic perfect fluid as matter field.
| [
{
"created": "Thu, 9 Aug 2001 16:01:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Socorro",
"J.",
""
]
] | Using technique of supersymmetric quantum mechanics we present new cosmological quantum solution, in the regime for FRW cosmological model using a barotropic perfect fluid as matter field. |
0802.0951 | Taichi Kobayashi | Taichi Kobayashi, Kohei Onda and Akira Tomimatsu | Disk illumination by black hole superradiance of electromagnetic
perturbations | 11 pages, 4 figures, corrected typos, published in Physical Review D | Phys.Rev.D77:064011,2008 | 10.1103/PhysRevD.77.064011 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Kerr-Schild formalism to solve the Einstein-Maxwell equations, we
study energy transport due to time-dependent electromagnetic perturbations
around a Kerr black hole, which may work as a mechanism to illuminate a disk
located on the equatorial plane. For such a disk-hole system it is found that
the energy e... | [
{
"created": "Thu, 7 Feb 2008 11:28:40 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Mar 2008 02:45:54 GMT",
"version": "v2"
}
] | 2010-09-14 | [
[
"Kobayashi",
"Taichi",
""
],
[
"Onda",
"Kohei",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | Using the Kerr-Schild formalism to solve the Einstein-Maxwell equations, we study energy transport due to time-dependent electromagnetic perturbations around a Kerr black hole, which may work as a mechanism to illuminate a disk located on the equatorial plane. For such a disk-hole system it is found that the energy ext... |
gr-qc/0406025 | Anzhong Wang | Anzhong Wang, Yumei Wu, and Zhong Chao Wu | Self-Similar Collapse of Scalar Field with Plane Symmetry | latex, two figures | Gen.Rel.Grav.36:1225-1236,2004 | 10.1023/B:GERG.0000018289.60173.c5 | CASPER-04-04 | gr-qc | null | Plane symmetric self-similar solutions to Einstein's four-dimensional theory
of gravity are studied and all such solutions are given analytically in closed
form. The local and global properties of these solutions are investigated and
it is shown that some of the solutions can be interpreted as representing
gravitatio... | [
{
"created": "Tue, 8 Jun 2004 02:14:23 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Wang",
"Anzhong",
""
],
[
"Wu",
"Yumei",
""
],
[
"Wu",
"Zhong Chao",
""
]
] | Plane symmetric self-similar solutions to Einstein's four-dimensional theory of gravity are studied and all such solutions are given analytically in closed form. The local and global properties of these solutions are investigated and it is shown that some of the solutions can be interpreted as representing gravitationa... |
gr-qc/0409015 | Remo Garattini | Remo Garattini | How Spacetime Foam modifies the brick wall | RevTeX4, 7 pages. Accepted for publication on Mod. Phys. Lett. A | Mod.Phys.Lett. A19 (2004) 2673-2682 | 10.1142/S0217732304015658 | null | gr-qc hep-th | null | We re-examine the brick-wall model in the context of spacetime foam. In
particular we consider a foam composed by wormholes of different sizes filling
the black hole horizon. The contribution of such wormholes is computed via a
scale invariant distribution. We obtain that the brick wall divergence appears
to be logar... | [
{
"created": "Fri, 3 Sep 2004 17:33:24 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Garattini",
"Remo",
""
]
] | We re-examine the brick-wall model in the context of spacetime foam. In particular we consider a foam composed by wormholes of different sizes filling the black hole horizon. The contribution of such wormholes is computed via a scale invariant distribution. We obtain that the brick wall divergence appears to be logarit... |
gr-qc/0304091 | Edgard Casal de Rey Neto | Edgard C. de Rey Neto, Odylio D. Aguiar, Jos\'e C. N. de Araujo | A perturbative solution for gravitational waves in quadratic gravity | 9 pages, to appear in CQG | Class.Quant.Grav.20:2025-2031,2003 | 10.1088/0264-9381/20/11/305 | null | gr-qc | null | We find a gravitational wave solution to the linearized version of quadratic
gravity by adding successive perturbations to the Einstein's linearized field
equations. We show that only the Ricci squared quadratic invariant contributes
to give a different solution of those found in Einstein's general relativity.
The pe... | [
{
"created": "Wed, 23 Apr 2003 18:06:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Neto",
"Edgard C. de Rey",
""
],
[
"Aguiar",
"Odylio D.",
""
],
[
"de Araujo",
"José C. N.",
""
]
] | We find a gravitational wave solution to the linearized version of quadratic gravity by adding successive perturbations to the Einstein's linearized field equations. We show that only the Ricci squared quadratic invariant contributes to give a different solution of those found in Einstein's general relativity. The pert... |
1510.06764 | Tsvi Piran | Elly Leiderschneider and Tsvi Piran | On the maximal efficiency of the collisional Penrose process | Accepted for publication in PRD | Phys. Rev. D 93, 043015 (2016) | 10.1103/PhysRevD.93.043015 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The center of mass (CM) energy in a collisional Penrose process - a collision
taking place within the ergosphere of a Kerr black hole - can diverge under
suitable extreme conditions (maximal Kerr, near horizon collision and suitable
impact parameters). We present an analytic expression for the CM energy,
refining exp... | [
{
"created": "Thu, 22 Oct 2015 20:40:37 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2016 19:17:07 GMT",
"version": "v2"
}
] | 2016-03-02 | [
[
"Leiderschneider",
"Elly",
""
],
[
"Piran",
"Tsvi",
""
]
] | The center of mass (CM) energy in a collisional Penrose process - a collision taking place within the ergosphere of a Kerr black hole - can diverge under suitable extreme conditions (maximal Kerr, near horizon collision and suitable impact parameters). We present an analytic expression for the CM energy, refining expre... |
1108.4686 | Daniel Grumiller | S. Carlip and D. Grumiller | Lower bound on the spectral dimension near a black hole | 6 pp, 2 eps figs | Phys.Rev. D84 (2011) 084029 | 10.1103/PhysRevD.84.084029 | TUW-11-21 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an evaporating Schwarzschild black hole in a framework in which
the spectral dimension of spacetime varies continuously from four at large
distances to a number smaller than three at small distances, as suggested by
various approaches to quantum gravity. We demonstrate that the evaporation
stops when the ... | [
{
"created": "Tue, 23 Aug 2011 20:00:01 GMT",
"version": "v1"
}
] | 2013-06-18 | [
[
"Carlip",
"S.",
""
],
[
"Grumiller",
"D.",
""
]
] | We consider an evaporating Schwarzschild black hole in a framework in which the spectral dimension of spacetime varies continuously from four at large distances to a number smaller than three at small distances, as suggested by various approaches to quantum gravity. We demonstrate that the evaporation stops when the ho... |
2212.13547 | Vladimir Khatsymovsky | V.M. Khatsymovsky | On the discrete version of the Kerr-Newman solution | 31 pages, 3 figures, typos corrected, explanations added | Int. J. Mod. Phys. A, Volume No. 38, Issue No. 04n05, Article No.
2350025, Year 2023 | 10.1142/S0217751X23500252 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper continues our work on black holes in the framework of the Regge
calculus, where the discrete version (with a certain edge length scale $b$
proportional to the Planck scale) of the classical solution emerges as an
optimal starting point for the perturbative expansion after functional
integration over the co... | [
{
"created": "Tue, 27 Dec 2022 16:45:35 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Dec 2023 16:39:35 GMT",
"version": "v2"
}
] | 2023-12-29 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | This paper continues our work on black holes in the framework of the Regge calculus, where the discrete version (with a certain edge length scale $b$ proportional to the Planck scale) of the classical solution emerges as an optimal starting point for the perturbative expansion after functional integration over the conn... |
gr-qc/0511037 | Xiao Zhang | Wen-ling Huang, Xiao Zhang | On the relation between ADM and Bondi energy-momenta - radiative spatial
infinity | 13 pages; appendix added for an addendum to [12] | Proceedings of the 4th International Congress of Chinese
Mathematicians, Hangzhou 2007, December 17-22, Vol III, 367-379, Higher
Education Press 2008 | null | null | gr-qc math.DG | null | In a vacuum spacetime equips with the Bondi's radiating metric which is
asymptotically flat at spatial infinity including gravitational radiation ({\bf
Condition D}), we establish the relation between the ADM total linear momentum
and the Bondi momentum. The relation between the ADM total energy and the Bondi
mass in... | [
{
"created": "Tue, 8 Nov 2005 06:48:15 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2005 15:27:12 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Mar 2006 22:59:42 GMT",
"version": "v3"
},
{
"created": "Sun, 1 Oct 2006 15:28:29 GMT",
"version": "v4"
},
{
"cre... | 2007-12-24 | [
[
"Huang",
"Wen-ling",
""
],
[
"Zhang",
"Xiao",
""
]
] | In a vacuum spacetime equips with the Bondi's radiating metric which is asymptotically flat at spatial infinity including gravitational radiation ({\bf Condition D}), we establish the relation between the ADM total linear momentum and the Bondi momentum. The relation between the ADM total energy and the Bondi mass in t... |
gr-qc/0309123 | Boris Kosyakov | B. P. Kosyakov | Self-accelerated Universe | 11 pages; Talk at the 9th Adriatic Meeting, Dubrovnic, Croatia, 4-14
September, 2003, Minor improvement, references added; to appear in ``Progress
in General Relativity and Quantum Cosmology Research'', Nova Science
Publishers | Int.J.Mod.Phys.A20:2459-2464,2005;
SpringerProc.Phys.98:155-162,2005 | 10.1142/S0217751X05024778 | null | gr-qc astro-ph | null | It is widely believed that the large redshifts for distant supernovae are
explained by the vacuum energy dominance, or, in other words, by the
cosmological constant in Einstein's equations, which is responsible for the
anti-gravitation effect. A tacit assumption is that particles move along a
geodesic for the backgro... | [
{
"created": "Thu, 25 Sep 2003 13:51:02 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Sep 2003 20:22:29 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Apr 2004 18:58:36 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Kosyakov",
"B. P.",
""
]
] | It is widely believed that the large redshifts for distant supernovae are explained by the vacuum energy dominance, or, in other words, by the cosmological constant in Einstein's equations, which is responsible for the anti-gravitation effect. A tacit assumption is that particles move along a geodesic for the backgroun... |
1505.07225 | Vassilios Mewes | Vassilios Mewes, Jos\'e A. Font, Pedro J. Montero | Measuring the black hole spin direction in 3D Cartesian numerical
relativity simulations | null | Phys. Rev. D 91, 124043, 2015 | 10.1103/PhysRevD.91.124043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the so-called flat-space rotational Killing vector method for
measuring the Cartesian components of a black hole spin can be derived from the
surface integral of Weinberg's pseudotensor over the apparent horizon surface
when using Gaussian normal coordinates in the integration. Moreover, the
integration ... | [
{
"created": "Wed, 27 May 2015 08:48:25 GMT",
"version": "v1"
}
] | 2016-07-26 | [
[
"Mewes",
"Vassilios",
""
],
[
"Font",
"José A.",
""
],
[
"Montero",
"Pedro J.",
""
]
] | We show that the so-called flat-space rotational Killing vector method for measuring the Cartesian components of a black hole spin can be derived from the surface integral of Weinberg's pseudotensor over the apparent horizon surface when using Gaussian normal coordinates in the integration. Moreover, the integration of... |
2408.00094 | Daniel Carney | Daniel Carney | Comments on graviton detection | Includes explicit calculation of squeezed graviton noise in LIGO;
otherwise mostly a pedagogical version of arXiv:2308.12988. 17 breezy pages,
2 figures. Dedicated to Gordon Semenoff on the occasion of his 70th birthday,
and based on a talk at his festschrift held at the Universit\'e de
Montr\'eal, July 2023 | null | null | null | gr-qc hep-ph hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | It is possible to make a detector which clicks after absorbing a single
graviton. Similarly, it is possible to make a gravitational wave detector which
can see the quantum noise induced by certain highly squeezed states of the
graviton. However, contrary to some recent arguments in the literature,
observation of eith... | [
{
"created": "Wed, 31 Jul 2024 18:15:51 GMT",
"version": "v1"
}
] | 2024-08-02 | [
[
"Carney",
"Daniel",
""
]
] | It is possible to make a detector which clicks after absorbing a single graviton. Similarly, it is possible to make a gravitational wave detector which can see the quantum noise induced by certain highly squeezed states of the graviton. However, contrary to some recent arguments in the literature, observation of either... |
gr-qc/9911008 | Konstantin G. Zloshchastiev | I. Z. Fisher (translation and foreword by K. G. Zloshchastiev) | Scalar mesostatic field with regard for gravitational effects | who was the pioneer in obtaining of exact static solutions of
Einstein equations coupled with scalar field? | Zh.Eksp.Teor.Fiz. 18 (1948) 636-640 | null | null | gr-qc physics.hist-ph | null | (Foreword by translator.) The aim of present translation is to clarify the
historically important question who was the pioneer in obtaining of exact
static solutions of Einstein equations minimally coupled with scalar field.
Usually, people cite the works by Janis, Newman, Winicour (Phys. Rev. Lett. 20
(1968) 878) an... | [
{
"created": "Wed, 3 Nov 1999 07:49:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fisher",
"I. Z.",
"",
"translation and foreword by K. G. Zloshchastiev"
]
] | (Foreword by translator.) The aim of present translation is to clarify the historically important question who was the pioneer in obtaining of exact static solutions of Einstein equations minimally coupled with scalar field. Usually, people cite the works by Janis, Newman, Winicour (Phys. Rev. Lett. 20 (1968) 878) and ... |
2407.20800 | Denis Dobkowski-Ry{\l}ko | Denis Dobkowski-Ry{\l}ko, Jerzy Lewandowski | Quadrupole formulae with cosmological constant: comparison | 13+4 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider three different approaches (by Ashtekar, Bonga and Kesavan; Hoque
and Virmani; and Dobkowski-Ry\l{}ko and Lewandowski) to investigate
gravitational radiation produced by time changing matter source in de Sitter
spacetime. All of them lead to generalizations of the quadrupole formula,
however, due to diffe... | [
{
"created": "Tue, 30 Jul 2024 13:04:17 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Dobkowski-Ryłko",
"Denis",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | We consider three different approaches (by Ashtekar, Bonga and Kesavan; Hoque and Virmani; and Dobkowski-Ry\l{}ko and Lewandowski) to investigate gravitational radiation produced by time changing matter source in de Sitter spacetime. All of them lead to generalizations of the quadrupole formula, however, due to differe... |
2004.04664 | Kimet Jusufi | Kimet Jusufi | Connection Between the Shadow Radius and Quasinormal Modes in Rotating
Spacetimes | 8 pages, 4 figures. Published in Phys. Rev. D | Phys. Rev. D 101, 124063 (2020) | 10.1103/PhysRevD.101.124063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the geometric-optics correspondence between the parameters of a
quasinormal mode and the conserved quantities along geodesics, we propose an
equation to calculate the typical shadow radius for asymptotically flat and
rotating black holes when viewed from the equatorial plane given by
\begin{equation}\notag \... | [
{
"created": "Wed, 8 Apr 2020 13:35:09 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Apr 2020 17:19:15 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Jun 2020 06:29:26 GMT",
"version": "v3"
},
{
"created": "Mon, 29 Jun 2020 15:39:32 GMT",
"version": "v4"
}
] | 2020-07-08 | [
[
"Jusufi",
"Kimet",
""
]
] | Based on the geometric-optics correspondence between the parameters of a quasinormal mode and the conserved quantities along geodesics, we propose an equation to calculate the typical shadow radius for asymptotically flat and rotating black holes when viewed from the equatorial plane given by \begin{equation}\notag \ba... |
gr-qc/0601064 | Oliver Rinne | Oliver Rinne | Axisymmetric Numerical Relativity | PhD thesis, University of Cambridge, September 2005. LaTeX, 310
pages, 34 figures, 5 tables. Some typos fixed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis is concerned with formulations of the Einstein equations in
axisymmetric spacetimes which are suitable for numerical evolutions. We develop
two evolution systems based on the (2+1)+1 formalism. The first is a
(partially) constrained scheme with elliptic gauge conditions arising from
maximal slicing and co... | [
{
"created": "Tue, 17 Jan 2006 18:14:22 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Dec 2013 13:59:43 GMT",
"version": "v2"
}
] | 2013-12-06 | [
[
"Rinne",
"Oliver",
""
]
] | This thesis is concerned with formulations of the Einstein equations in axisymmetric spacetimes which are suitable for numerical evolutions. We develop two evolution systems based on the (2+1)+1 formalism. The first is a (partially) constrained scheme with elliptic gauge conditions arising from maximal slicing and conf... |
gr-qc/0507002 | Bozhidar Zakhariev Iliev | Bozhidar Z. Iliev and Sawa S. Manoff (Institute for Nuclear Research
and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria) | Deviation equations in spaces with torsion | 2 LaTeX page. The packages AMS-LaTeX and amsfonts are required. For
related papers, visit the "publication" pages at
http://theo.inrne.bas.bg/~bozho/ Prof. Sawa Manoff passed away on May 27,
2005 | Proceedings of the 5-th Soviet (USSR) Gravity Conference "Modern
theoretical and experimental problems of relativiy theory and gravitation"',
Moscow Univ. Press, Moscow, 1981, p.122 (In Russian) | null | null | gr-qc math-ph math.MP | null | The most general form of the deviation equations in spaces with linear
connection with arbitrary torsion is derived.
| [
{
"created": "Fri, 1 Jul 2005 05:01:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Iliev",
"Bozhidar Z.",
"",
"Institute for Nuclear Research\n and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria"
],
[
"Manoff",
"Sawa S.",
"",
"Institute for Nuclear Research\n and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria"
]
] | The most general form of the deviation equations in spaces with linear connection with arbitrary torsion is derived. |
2007.05564 | Albert Escriv\`a | Albert Escriv\`a, Cristiano Germani, Ravi K. Sheth | Analytical thresholds for black hole formation in general cosmological
backgrounds | 19 pages and 15 figures. v2: small changes. Accepted for publication
in JCAP | null | 10.1088/1475-7516/2021/01/030 | ICCUB-20-016 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider black holes which form from an initially spherically symmetric
super-Hubble perturbation of a cosmological background filled by a perfect
fluid $p=w \rho$ with $w\in (0,1]$. Previous work has shown that when $w = 1/3$
(radiation), there is a critical threshold for black hole formation
($\delta_c$), which,... | [
{
"created": "Fri, 10 Jul 2020 18:38:51 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Nov 2020 17:08:34 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Escrivà",
"Albert",
""
],
[
"Germani",
"Cristiano",
""
],
[
"Sheth",
"Ravi K.",
""
]
] | We consider black holes which form from an initially spherically symmetric super-Hubble perturbation of a cosmological background filled by a perfect fluid $p=w \rho$ with $w\in (0,1]$. Previous work has shown that when $w = 1/3$ (radiation), there is a critical threshold for black hole formation ($\delta_c$), which, t... |
2403.02168 | Miguel Cruz | Gilberto Aguilar-P\'erez, Ana A. Avilez-L\'opez and Miguel Cruz | Exploring the cosmological degeneracy between decaying dark matter model
and viscous $\Lambda$CDM | 11 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of an homogeneous and isotropic universe, we consider the
degeneracy condition at background level between two scenarios in which
processes out of equilibrium are possible to explore their cosmological
implications; this consideration allows us to deviate from the perfect fluid
description and in this ... | [
{
"created": "Mon, 4 Mar 2024 16:15:19 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Aguilar-Pérez",
"Gilberto",
""
],
[
"Avilez-López",
"Ana A.",
""
],
[
"Cruz",
"Miguel",
""
]
] | In the context of an homogeneous and isotropic universe, we consider the degeneracy condition at background level between two scenarios in which processes out of equilibrium are possible to explore their cosmological implications; this consideration allows us to deviate from the perfect fluid description and in this ca... |
1301.2932 | Vicente Jos\'e Bol\'os | Vicente J. Bol\'os | An algorithm for computing geometric relative velocities through Fermi
and observational coordinates | 21 pages, 11 figures, revised version with some comments and a figure
added | Gen. Relativ. Gravit., 46 (2014), 1623 | 10.1007/s10714-013-1623-9 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a numerical method for computing the \textit{Fermi} and
\textit{observational coordinates} of a distant test particle with respect to
an observer. We apply this method for computing some previously introduced
concepts of relative velocity: \textit{kinematic}, \textit{Fermi},
\textit{spectroscopic} and \tex... | [
{
"created": "Mon, 14 Jan 2013 12:02:32 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Sep 2013 08:35:57 GMT",
"version": "v2"
}
] | 2015-02-18 | [
[
"Bolós",
"Vicente J.",
""
]
] | We present a numerical method for computing the \textit{Fermi} and \textit{observational coordinates} of a distant test particle with respect to an observer. We apply this method for computing some previously introduced concepts of relative velocity: \textit{kinematic}, \textit{Fermi}, \textit{spectroscopic} and \texti... |
gr-qc/0304092 | Alec Maassen van den Brink | Alec Maassen van den Brink | Approach to the extremal limit of the Schwarzschild-de Sitter black hole | REVTeX4, 4pp., no figures. N.B. "Alec" is my first, and "Maassen van
den Brink" my family name. v2: added numerical verification | Phys.Rev. D68 (2003) 047501 | 10.1103/PhysRevD.68.047501 | null | gr-qc | null | The quasinormal-mode spectrum of the Schwarzschild-de Sitter black hole is
studied in the limit of near-equal black-hole and cosmological radii. It is
found that the mode_frequencies_ agree with the P"oschl-Teller approximation to
one more order than previously realized, even though the effective_potential_
does not.... | [
{
"created": "Thu, 24 Apr 2003 16:38:45 GMT",
"version": "v1"
},
{
"created": "Fri, 2 May 2003 16:23:36 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Brink",
"Alec Maassen van den",
""
]
] | The quasinormal-mode spectrum of the Schwarzschild-de Sitter black hole is studied in the limit of near-equal black-hole and cosmological radii. It is found that the mode_frequencies_ agree with the P"oschl-Teller approximation to one more order than previously realized, even though the effective_potential_ does not. W... |
2010.11790 | Valerio Faraoni | Shin'ichi Nojiri, Sergei D. Odintsov, and Valerio Faraoni | Searching for dynamical black holes in various theories of gravity | Added extra explanation and Appendix B, bibliography expanded.
Matches version accepted in Phys. Rev. D | Phys. Rev. D 103, 044055 (2021) | 10.1103/PhysRevD.103.044055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct models of Einstein and $f(R)$ gravity with two scalar fields,
which admit analytical solutions describing time-varying dynamical black holes.
Their thermodynamics is investigated in the adiabatic approximation. In
addition to the Misner-Sharp-Hernandez quasilocal mass, we provide
time-dependent thermodyn... | [
{
"created": "Thu, 22 Oct 2020 15:09:31 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Feb 2021 13:52:50 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Faraoni",
"Valerio",
""
]
] | We construct models of Einstein and $f(R)$ gravity with two scalar fields, which admit analytical solutions describing time-varying dynamical black holes. Their thermodynamics is investigated in the adiabatic approximation. In addition to the Misner-Sharp-Hernandez quasilocal mass, we provide time-dependent thermodynam... |
1612.03406 | Farhad Darabi | F. Felegary, F. Darabi, and M. R. Setare | Interacting Holographic Dark Energy model in Brans-Dicke cosmology and
coincidence problem | 14 pages, two figures, revised | Int. J. Mod. Phys. D. 27, (2018) 1850017 | 10.1142/S0218271818500177 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of interacting holographic dark energy model in
Brans-Dicke cosmology for the future event horizon and the Hubble horizon
cut-offs. We determine the system of first-order differential equations for the
future event horizon and Hubble horizon cut-offs, and obtain the corresponding
fixed points, a... | [
{
"created": "Sun, 11 Dec 2016 12:41:16 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2017 08:14:54 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Nov 2017 12:21:39 GMT",
"version": "v3"
}
] | 2017-11-08 | [
[
"Felegary",
"F.",
""
],
[
"Darabi",
"F.",
""
],
[
"Setare",
"M. R.",
""
]
] | We study the dynamics of interacting holographic dark energy model in Brans-Dicke cosmology for the future event horizon and the Hubble horizon cut-offs. We determine the system of first-order differential equations for the future event horizon and Hubble horizon cut-offs, and obtain the corresponding fixed points, att... |
1308.1012 | Yasha Neiman | Yasha Neiman | A look at area Regge calculus | 15 pages, 2 figures | null | null | IGC-13/8-1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Area Regge calculus is a candidate theory of simplicial gravity, based on the
Regge action with triangle areas as the dynamical variables. It is
characterized by metric discontinuities and vanishing deficit angles. Area
Regge calculus arises in the large-spin limit of the Barrett-Crane spinfoam
model, but not in the ... | [
{
"created": "Mon, 5 Aug 2013 15:33:25 GMT",
"version": "v1"
}
] | 2013-08-06 | [
[
"Neiman",
"Yasha",
""
]
] | Area Regge calculus is a candidate theory of simplicial gravity, based on the Regge action with triangle areas as the dynamical variables. It is characterized by metric discontinuities and vanishing deficit angles. Area Regge calculus arises in the large-spin limit of the Barrett-Crane spinfoam model, but not in the ne... |
2205.00576 | Yang Liu | Yang Liu | Higgs inflation and scalar weak gravity conjecture | null | null | 10.1140/epjc/s10052-022-10993-8 | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this article, we intend to find a specific model which can satisfy the
further refining dS swampland conjecture and scalar weak gravity conjecture
(SWGC) simultaneously, in particular, Higgs inflation model and its two
extensions: Higgs-Dilaton model and Palatini Higgs inflation. We find that
although Higgs inflat... | [
{
"created": "Sun, 1 May 2022 23:03:05 GMT",
"version": "v1"
}
] | 2022-11-30 | [
[
"Liu",
"Yang",
""
]
] | In this article, we intend to find a specific model which can satisfy the further refining dS swampland conjecture and scalar weak gravity conjecture (SWGC) simultaneously, in particular, Higgs inflation model and its two extensions: Higgs-Dilaton model and Palatini Higgs inflation. We find that although Higgs inflatio... |
2405.20514 | Adrian Kent | Adrian Kent (Centre for Quantum Information and Foundations, DAMTP,
University of Cambridge and Perimeter Institute) | Should we necessarily treat masses as localized when analysing tests of
quantum gravity? | null | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently proposed ``table-top tests of quantum gravity'' involve creating,
separating and recombining superpositions of masses at non-relativistic speeds.
The general expectation is that these generate superpositions of gravitational
fields via the Newtonian potential. Analyses suggest that negligible
gravitational r... | [
{
"created": "Thu, 30 May 2024 22:17:08 GMT",
"version": "v1"
}
] | 2024-06-03 | [
[
"Kent",
"Adrian",
"",
"Centre for Quantum Information and Foundations, DAMTP,\n University of Cambridge and Perimeter Institute"
]
] | Recently proposed ``table-top tests of quantum gravity'' involve creating, separating and recombining superpositions of masses at non-relativistic speeds. The general expectation is that these generate superpositions of gravitational fields via the Newtonian potential. Analyses suggest that negligible gravitational rad... |
gr-qc/9706067 | Dmitri Vladimirovich Galtsov | D.V. Gal'tsov and E.E. Donets | Power-law mass inflation in Einstein-Yang-Mills-Higgs black holes | 6 pages Latex | null | 10.1016/S1251-8069(99)80063-3 | null | gr-qc | null | Analytical formulas are presented describing a generic singularity inside the
static spherically symmetric black holes in the SU(2) Einstein-Yang-Mills-Higgs
theories with triplet or doublet Higgs field. The singularity is spacelike and
exhibits a `power-low mass inflation'. Alternatively this asymptotic may be
inter... | [
{
"created": "Sun, 22 Jun 1997 00:22:16 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Gal'tsov",
"D. V.",
""
],
[
"Donets",
"E. E.",
""
]
] | Analytical formulas are presented describing a generic singularity inside the static spherically symmetric black holes in the SU(2) Einstein-Yang-Mills-Higgs theories with triplet or doublet Higgs field. The singularity is spacelike and exhibits a `power-low mass inflation'. Alternatively this asymptotic may be interpr... |
2008.13730 | Suphakorn Chunlen | Suphakorn Chunlen, Phongsaphat Rangdee | Exploring the R\'enyi Holographic Dark Energy Model with the Future and
the Particle Horizons as the Infrared Cut-off | null | Phayao Research Conference 10 (2021) 2413-2423 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the R\'enyi holographic dark energy (RHDE) model by using the future
and the particle horizons as the infrared (IR) cut-off. With the initial
condition from the literature, most of the cosmological parameters are
computed. Some of the results agree with the observation that the present
universe is in acceler... | [
{
"created": "Mon, 31 Aug 2020 16:50:40 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Sep 2020 05:59:43 GMT",
"version": "v2"
},
{
"created": "Mon, 24 May 2021 12:07:56 GMT",
"version": "v3"
}
] | 2021-05-25 | [
[
"Chunlen",
"Suphakorn",
""
],
[
"Rangdee",
"Phongsaphat",
""
]
] | We study the R\'enyi holographic dark energy (RHDE) model by using the future and the particle horizons as the infrared (IR) cut-off. With the initial condition from the literature, most of the cosmological parameters are computed. Some of the results agree with the observation that the present universe is in accelerat... |
1706.01906 | Hideki Maeda | Hideki Maeda and Gabor Kunstatter | Exact time-dependent states for throat quantized toroidal AdS black
holes | 63 pages, 12 figures, 3 tables; v2, final version published in
Physical Review D | Phys. Rev. D 96, 106004 (2017) | 10.1103/PhysRevD.96.106004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate exact non-stationary quantum states of vacuum toroidal black
holes with a negative cosmological constant in arbitrary dimensions using the
framework of throat quantization pioneered by Louko and M\"akel\"a for
Schwarzschild black holes. The system is equivalent to a harmonic oscillator on
the half line... | [
{
"created": "Tue, 6 Jun 2017 18:09:53 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Nov 2017 03:52:20 GMT",
"version": "v2"
}
] | 2017-11-17 | [
[
"Maeda",
"Hideki",
""
],
[
"Kunstatter",
"Gabor",
""
]
] | We investigate exact non-stationary quantum states of vacuum toroidal black holes with a negative cosmological constant in arbitrary dimensions using the framework of throat quantization pioneered by Louko and M\"akel\"a for Schwarzschild black holes. The system is equivalent to a harmonic oscillator on the half line, ... |
1102.3421 | Alessandra Corsi | Alessandra Corsi and Benjamin J. Owen | Maximum gravitational-wave energy emissible in magnetar flares | 16 pages, 5 figures, 1 table | Phys.Rev.D83:104014,2011 | 10.1103/PhysRevD.83.104014 | IGC-11/1-3 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent searches of gravitational-wave (GW) data raise the question of what
maximum GW energies could be emitted during gamma-ray flares of highly
magnetized neutron stars (magnetars). The highest energies (\sim 10^{49} erg)
predicted so far come from a model [K. Ioka, Mon. Not. Roy. Astron. Soc. 327,
639 (2001)] in w... | [
{
"created": "Wed, 16 Feb 2011 20:38:57 GMT",
"version": "v1"
}
] | 2011-05-13 | [
[
"Corsi",
"Alessandra",
""
],
[
"Owen",
"Benjamin J.",
""
]
] | Recent searches of gravitational-wave (GW) data raise the question of what maximum GW energies could be emitted during gamma-ray flares of highly magnetized neutron stars (magnetars). The highest energies (\sim 10^{49} erg) predicted so far come from a model [K. Ioka, Mon. Not. Roy. Astron. Soc. 327, 639 (2001)] in whi... |
gr-qc/0204041 | Atalay Karasu | Metin Gurses, Emre O. Kahya, Atalay Karasu | Higher Dimensional Metrics of Colliding Gravitational Plane Waves | 4 pages RevTex4 | Phys.Rev. D66 (2002) 024029 | 10.1103/PhysRevD.66.024029 | null | gr-qc hep-th | null | We give a higher even dimensional extension of vacuum colliding gravitational
plane waves with the combinations of collinear and non-collinear polarized
four-dimensional metric. The singularity structure of space-time depends on the
parameters of the solution.
| [
{
"created": "Fri, 12 Apr 2002 07:23:43 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Jul 2002 08:22:36 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Gurses",
"Metin",
""
],
[
"Kahya",
"Emre O.",
""
],
[
"Karasu",
"Atalay",
""
]
] | We give a higher even dimensional extension of vacuum colliding gravitational plane waves with the combinations of collinear and non-collinear polarized four-dimensional metric. The singularity structure of space-time depends on the parameters of the solution. |
gr-qc/0107053 | Abhik Kumar Sanyal | Abhik Kumar Sanyal | Noether and some other dynamical symmetries in Kantowski-Sachs model | 7 pages,Latex | Phys.Lett. B524 (2002) 177-184 | 10.1016/S0370-2693(01)01376-4 | null | gr-qc | null | The forms of coupling of the scalar field with gravity, appearing in the
induced theory of gravity, and the potential are found in the Kantowski-Sachs
model under the assumption that the Lagrangian admits Noether symmetry. The
form thus obtained makes the Lagrangian degenerate. The constrained dynamics
thus evolved d... | [
{
"created": "Mon, 16 Jul 2001 05:35:49 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Sanyal",
"Abhik Kumar",
""
]
] | The forms of coupling of the scalar field with gravity, appearing in the induced theory of gravity, and the potential are found in the Kantowski-Sachs model under the assumption that the Lagrangian admits Noether symmetry. The form thus obtained makes the Lagrangian degenerate. The constrained dynamics thus evolved due... |
2009.00309 | Shun Jiang | Shun Jiang | Super Penrose Process for Kerr Black Hole And White Hole in Rainbow
Gravity | 7 pages,reference added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, O.B.Zaslavskii considers the collision near the horizon of the
extremal Kerr black hole that produces two particles and one of two particles
has divergent conserved killing energy(the so called super Penrose process).
O.B.Zaslavskii shows this particle can not move in a asymptotic region in this
universe. T... | [
{
"created": "Tue, 1 Sep 2020 09:23:33 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Sep 2020 05:30:55 GMT",
"version": "v2"
}
] | 2020-09-03 | [
[
"Jiang",
"Shun",
""
]
] | Recently, O.B.Zaslavskii considers the collision near the horizon of the extremal Kerr black hole that produces two particles and one of two particles has divergent conserved killing energy(the so called super Penrose process). O.B.Zaslavskii shows this particle can not move in a asymptotic region in this universe. Thi... |
1407.4383 | Alvaro de la Cruz-Dombriz | J. A. R. Cembranos (SLAC & Madrid U), A. de la Cruz-Dombriz (Madrid U)
and J. Jarillo (Madrid U) | Reissner-Nordstrom Black Holes in the Inverse Electrodynamics Model | published version in JCAP 02 (2015) 042, minor changes, Conclusions
enlarged, 9 pages, 4 figures, two-column format | null | 10.1088/1475-7516/2015/02/042 | SLAC-PUB-16024 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study electric and magnetic monopoles in static, spherically symmetric and
constant curvature geometries in the context of the inverse electrodynamics
model. We prove that this U(1) invariant Lagrangian density is able to support
the standard metric of a Reissner-Nordstrom Black Hole, but with more complex
thermod... | [
{
"created": "Wed, 16 Jul 2014 16:51:59 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2015 15:41:23 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Cembranos",
"J. A. R.",
"",
"SLAC & Madrid U"
],
[
"de la Cruz-Dombriz",
"A.",
"",
"Madrid U"
],
[
"Jarillo",
"J.",
"",
"Madrid U"
]
] | We study electric and magnetic monopoles in static, spherically symmetric and constant curvature geometries in the context of the inverse electrodynamics model. We prove that this U(1) invariant Lagrangian density is able to support the standard metric of a Reissner-Nordstrom Black Hole, but with more complex thermodyn... |
gr-qc/0301110 | Pavel Krtous | Pavel Krtous, Jiri Podolsky | Radiation from accelerated black holes in de Sitter universe | 28 pages, 9 figures, RevTeX | Phys.Rev. D68 (2003) 024005 | 10.1103/PhysRevD.68.024005 | null | gr-qc hep-th | null | Radiative properties of gravitational and electromagnetic fields generated by
uniformly accelerated charged black holes in asymptotically de Sitter spacetime
are studied by analyzing the C-metric exact solution of the Einstein-Maxwell
equations with a positive cosmological constant. Its global structure and
physical ... | [
{
"created": "Mon, 27 Jan 2003 14:36:13 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Mar 2003 12:48:53 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Dec 2003 14:16:55 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Krtous",
"Pavel",
""
],
[
"Podolsky",
"Jiri",
""
]
] | Radiative properties of gravitational and electromagnetic fields generated by uniformly accelerated charged black holes in asymptotically de Sitter spacetime are studied by analyzing the C-metric exact solution of the Einstein-Maxwell equations with a positive cosmological constant. Its global structure and physical pr... |
2105.12629 | Hemwati Nandan | Prateek Sharma, Hemwati Nandan, Uma Papnoi and Arindam Kumar
Chatterjee | Optical and Thermodynamic Properties of a Rotating Dyonic Black Hole
Spacetime in $\mathcal{N} = 2, U(1)^2$ gauged supergravity | null | null | 10.1140/epjc/s10052-021-09178-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null geodesics and the distance of closest approach for photon around a
rotating dyonic black hole in $\mathcal{N} = 2, U(1)^2$ gauged supergravity is
studied. The phenomenon of black hole shadows with various black hole
parameters has also analyzed. Further, the investigation of various
thermodynamic properties ... | [
{
"created": "Wed, 26 May 2021 15:38:09 GMT",
"version": "v1"
}
] | 2021-05-27 | [
[
"Sharma",
"Prateek",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Papnoi",
"Uma",
""
],
[
"Chatterjee",
"Arindam Kumar",
""
]
] | The null geodesics and the distance of closest approach for photon around a rotating dyonic black hole in $\mathcal{N} = 2, U(1)^2$ gauged supergravity is studied. The phenomenon of black hole shadows with various black hole parameters has also analyzed. Further, the investigation of various thermodynamic properties fo... |
2106.13426 | Daniel R Terno | Pravin Kumar Dahal and Daniel R. Terno | Polarization rotation and near-Earth quantum communications | 9 pages, 3 figures Published version | Phys Rev A 104, 042610 (2021) | 10.1103/PhysRevA.104.042610 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | We revisit polarization rotation due to gravity, known as the gravitational
Faraday effect, with a view on its role in quantum communications with
Earth-orbiting satellites. In a static spherically symmetric gravitational
field Faraday rotation is purely a reference frame (gauge) effect. This is so
also in the leadin... | [
{
"created": "Fri, 25 Jun 2021 04:45:52 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Oct 2021 22:02:54 GMT",
"version": "v2"
}
] | 2021-11-01 | [
[
"Dahal",
"Pravin Kumar",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We revisit polarization rotation due to gravity, known as the gravitational Faraday effect, with a view on its role in quantum communications with Earth-orbiting satellites. In a static spherically symmetric gravitational field Faraday rotation is purely a reference frame (gauge) effect. This is so also in the leading ... |
1908.00555 | Charlie Hoy | Stephen Fairhurst, Rhys Green, Mark Hannam, Charlie Hoy | When will we observe binary black holes precessing? | 5 pages, 2 Figures; resubmission following reviewers comments | Phys. Rev. D 102, 041302 (2020) | 10.1103/PhysRevD.102.041302 | LIGO-P1900224 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After eleven gravitational-wave detections from compact-binary mergers, we
are yet to observe the striking general-relativistic phenomenon of orbital
precession. Measurements of precession would provide valuable insights into the
distribution of black-hole spins, and therefore into astrophysical binary
formation mech... | [
{
"created": "Thu, 1 Aug 2019 18:00:28 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 22:11:02 GMT",
"version": "v2"
}
] | 2020-09-02 | [
[
"Fairhurst",
"Stephen",
""
],
[
"Green",
"Rhys",
""
],
[
"Hannam",
"Mark",
""
],
[
"Hoy",
"Charlie",
""
]
] | After eleven gravitational-wave detections from compact-binary mergers, we are yet to observe the striking general-relativistic phenomenon of orbital precession. Measurements of precession would provide valuable insights into the distribution of black-hole spins, and therefore into astrophysical binary formation mechan... |
1703.07811 | Gianluca Calcagni | Gianluca Calcagni, David Rodr\'iguez Fern\'andez and Michele Ronco | Black holes in multi-fractional and Lorentz-violating models | 17 pages, 3 figures. v2: minor typos corrected, references added | Eur. Phys. J. C 77, 335 (2017) | 10.1140/epjc/s10052-017-4879-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static and radially symmetric black holes in the multi-fractional
theories of gravity with $q$-derivatives and with weighted derivatives,
frameworks where the spacetime dimension varies with the probed scale and
geometry is characterized by at least one fundamental length $\ell_*$. In the
$q$-derivatives sce... | [
{
"created": "Wed, 22 Mar 2017 18:35:26 GMT",
"version": "v1"
},
{
"created": "Thu, 25 May 2017 07:25:26 GMT",
"version": "v2"
}
] | 2017-05-26 | [
[
"Calcagni",
"Gianluca",
""
],
[
"Fernández",
"David Rodríguez",
""
],
[
"Ronco",
"Michele",
""
]
] | We study static and radially symmetric black holes in the multi-fractional theories of gravity with $q$-derivatives and with weighted derivatives, frameworks where the spacetime dimension varies with the probed scale and geometry is characterized by at least one fundamental length $\ell_*$. In the $q$-derivatives scena... |
1409.3074 | Daisuke Yoshida | Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi and Daisuke Yoshida | Covariant St\"uckelberg analysis of de Rham-Gabadadze-Tolley massive
gravity with a general fiducial metric | 16 pages, 1 figure; v2 published version | Phys. Rev. D 90, 124073 (2014) | 10.1103/PhysRevD.90.124073 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The St\"uckelberg analysis of nonlinear massive gravity in the presence of a
general fiducial metric is investigated. We develop a "covariant" formalism for
the St\"uckelberg expansion by working with a local inertial frame, through
which helicity modes can be characterized correctly. Within this covariant
approach, ... | [
{
"created": "Tue, 9 Sep 2014 09:03:51 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jan 2015 13:04:12 GMT",
"version": "v2"
}
] | 2015-01-26 | [
[
"Gao",
"Xian",
""
],
[
"Kobayashi",
"Tsutomu",
""
],
[
"Yamaguchi",
"Masahide",
""
],
[
"Yoshida",
"Daisuke",
""
]
] | The St\"uckelberg analysis of nonlinear massive gravity in the presence of a general fiducial metric is investigated. We develop a "covariant" formalism for the St\"uckelberg expansion by working with a local inertial frame, through which helicity modes can be characterized correctly. Within this covariant approach, an... |
2006.09681 | Joshua Foo | Joshua Foo, Michael R. R. Good | Hawking radiation particle spectrum of a Kerr-Newman black hole | 7 pages, 7 figures | Journal of Cosmology and Astroparticle Physics, 01 (2021) 019 | 10.1088/1475-7516/2021/01/019 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Charged, rotating Kerr-Newman black holes represent the most general class of
asymptotically flat black hole solutions to the Einstein-Maxwell equations of
general relativity. Here, we consider a simplified model for the Hawking
radiation produced by a Kerr-Newman black hole by utilising a (1+1)-dimensional
accelerat... | [
{
"created": "Wed, 17 Jun 2020 06:44:40 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2020 23:37:59 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Oct 2020 06:57:51 GMT",
"version": "v3"
}
] | 2021-01-15 | [
[
"Foo",
"Joshua",
""
],
[
"Good",
"Michael R. R.",
""
]
] | Charged, rotating Kerr-Newman black holes represent the most general class of asymptotically flat black hole solutions to the Einstein-Maxwell equations of general relativity. Here, we consider a simplified model for the Hawking radiation produced by a Kerr-Newman black hole by utilising a (1+1)-dimensional accelerated... |
2002.09823 | Baocheng Zhang | Baocheng Zhang and Li You | A divergent volume for black holes calls for no "firewall" | null | Commun. Theor. Phys. 72, 025401 (2020) | 10.1088/1572-9494/ab6186 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presumption that Hawking radiations are thermally distributed can be
considered to result from their entanglement with the internal degrees of
freedom for a black hole. This leads to the "firewall" paradox if unitary
evolution continues into Page's time when a black hole evaporates away half of
its initial entrop... | [
{
"created": "Sun, 23 Feb 2020 04:11:19 GMT",
"version": "v1"
}
] | 2020-02-25 | [
[
"Zhang",
"Baocheng",
""
],
[
"You",
"Li",
""
]
] | The presumption that Hawking radiations are thermally distributed can be considered to result from their entanglement with the internal degrees of freedom for a black hole. This leads to the "firewall" paradox if unitary evolution continues into Page's time when a black hole evaporates away half of its initial entropy.... |
1404.6410 | Irina Radinschi | I. Radinschi, F. Rahaman, Th. Grammenos, A. Spanou, Sayeedul Islam | Energy distribution of a regular black hole solution in
Einstein-nonlinear electrodynamics | 18 pages, LaTex, a new and extended version of arXiv:1404.6410 with
more authors | Adv.Math.Phys., Volume 2015 (2015), 530281 | 10.1155/2015/530281 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work a study about the energy-momentum of a new four-dimensional
spherically symmetric, static and charged, regular black hole solution
developed in the context of general relativity coupled to nonlinear
electrodynamics is presented. Asymptotically, this new black hole solution
behaves as the Reissner-Nordstr... | [
{
"created": "Fri, 25 Apr 2014 13:14:28 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jul 2014 22:29:30 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"Radinschi",
"I.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Grammenos",
"Th.",
""
],
[
"Spanou",
"A.",
""
],
[
"Islam",
"Sayeedul",
""
]
] | In this work a study about the energy-momentum of a new four-dimensional spherically symmetric, static and charged, regular black hole solution developed in the context of general relativity coupled to nonlinear electrodynamics is presented. Asymptotically, this new black hole solution behaves as the Reissner-Nordstr\"... |
2203.09763 | Kazuya Okamura | Hirofumi Sakuma, Izumi Ojima, Hayato Saigo, Kazuya Okamura | Conserved relativistic Ertel's current generating the vortical and
thermodynamic aspects of spacetime | 16 pages, Submitted to Int. J. Mod. Phys. A | null | 10.1142/S0217751X2250155X | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Motivated by Aoki et al.'s recent research on conserved charges and entropy
current, we investigated the conservation of relativistic Ertel's current,
which has received little attention outside the field of geophysical fluid
dynamics. Ertel's charge is an important indicator of the correlation between
vortex vectors... | [
{
"created": "Fri, 18 Mar 2022 06:23:52 GMT",
"version": "v1"
}
] | 2022-11-09 | [
[
"Sakuma",
"Hirofumi",
""
],
[
"Ojima",
"Izumi",
""
],
[
"Saigo",
"Hayato",
""
],
[
"Okamura",
"Kazuya",
""
]
] | Motivated by Aoki et al.'s recent research on conserved charges and entropy current, we investigated the conservation of relativistic Ertel's current, which has received little attention outside the field of geophysical fluid dynamics. Ertel's charge is an important indicator of the correlation between vortex vectors a... |
2204.09260 | Qian Chen | Cheng-Yong Zhang, Qian Chen, Yunqi Liu, Wen-Kun Luo, Yu Tian, Bin Wang | Dynamical transitions in scalarization and descalarization through black
hole accretion | null | Phys.Rev.D 106, L061501 (2022) | 10.1103/PhysRevD.106.L061501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first fully nonlinear study on the accretion of scalar fields
onto a seed black hole in anti-de Sitter spacetime in Einstein-Maxwell-scalar
theory. Intrinsic critical phenomena in the dynamical transition between the
bald and scalarized black holes are disclosed. In scalarizations, the
transition is di... | [
{
"created": "Wed, 20 Apr 2022 06:57:58 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2022 04:41:43 GMT",
"version": "v2"
}
] | 2022-11-01 | [
[
"Zhang",
"Cheng-Yong",
""
],
[
"Chen",
"Qian",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Luo",
"Wen-Kun",
""
],
[
"Tian",
"Yu",
""
],
[
"Wang",
"Bin",
""
]
] | We present the first fully nonlinear study on the accretion of scalar fields onto a seed black hole in anti-de Sitter spacetime in Einstein-Maxwell-scalar theory. Intrinsic critical phenomena in the dynamical transition between the bald and scalarized black holes are disclosed. In scalarizations, the transition is disc... |
1910.13915 | Melanie Graf | Melanie Graf | Singularity theorems for $C^1$-Lorentzian metrics | 40 pages; v3: reviewer corrections, added some remarks, corrected
typos; To appear in CMP | null | 10.1007/s00220-020-03808-y | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Continuing recent efforts in extending the classical singularity theorems of
General Relativity to low regularity metrics, we give a complete proof of both
the Hawking and the Penrose singularity theorem for $C^1$-Lorentzian metrics -
a regularity where one still has existence but not uniqueness for solutions of
the ... | [
{
"created": "Wed, 30 Oct 2019 15:08:01 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Dec 2019 07:13:54 GMT",
"version": "v2"
},
{
"created": "Tue, 5 May 2020 16:49:55 GMT",
"version": "v3"
}
] | 2020-08-26 | [
[
"Graf",
"Melanie",
""
]
] | Continuing recent efforts in extending the classical singularity theorems of General Relativity to low regularity metrics, we give a complete proof of both the Hawking and the Penrose singularity theorem for $C^1$-Lorentzian metrics - a regularity where one still has existence but not uniqueness for solutions of the ge... |
2203.12760 | Mariateresa Crosta | Mariateresa Crosta, Mario G. Lattanzi, Christophe Le Poncin-Lafitte,
Mario Gai, Qi Zhaoxiang, and Alberto Vecchiato | On the principle of Astrometric Gravitational Wave Antenna | 17 pages, 3 figures | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The direct detection of gravitational waves by ground-based optical
interferometers has opened a new window in astronomy. Nevertheless, as these
detectors are a combination of two Michelson-Morley like baselines, their
sensitivity for determining the incident direction of a gravitational wave is
quite weak compared t... | [
{
"created": "Wed, 23 Mar 2022 23:21:22 GMT",
"version": "v1"
}
] | 2022-03-25 | [
[
"Crosta",
"Mariateresa",
""
],
[
"Lattanzi",
"Mario G.",
""
],
[
"Poncin-Lafitte",
"Christophe Le",
""
],
[
"Gai",
"Mario",
""
],
[
"Zhaoxiang",
"Qi",
""
],
[
"Vecchiato",
"Alberto",
""
]
] | The direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. Nevertheless, as these detectors are a combination of two Michelson-Morley like baselines, their sensitivity for determining the incident direction of a gravitational wave is quite weak compared to ... |
1106.4494 | Barun Majumder | Barun Majumder | Dilaton cosmology and the Modified Uncertainty Principle | 11 pages, 6 figures, accepted for publication in Phys. Rev. D | Phys. Rev. D 84, 064031 (2011) | 10.1103/PhysRevD.84.064031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Very recently Ali et al.(2009) proposed a new generalized uncertainty
principle (or GUP) with a linear term in Plank length which is consistent with
doubly special relativity and string theory. The classical and quantum effects
of this generalized uncertainty principle (term as modified uncertainty
principle or MUP) ... | [
{
"created": "Wed, 22 Jun 2011 16:30:24 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2011 05:34:47 GMT",
"version": "v2"
}
] | 2011-09-21 | [
[
"Majumder",
"Barun",
""
]
] | Very recently Ali et al.(2009) proposed a new generalized uncertainty principle (or GUP) with a linear term in Plank length which is consistent with doubly special relativity and string theory. The classical and quantum effects of this generalized uncertainty principle (term as modified uncertainty principle or MUP) ar... |
gr-qc/9503028 | Fernando Moraes | E.R. Bezerra de Mello, V.B. Bezerra, C. Furtado and F. Moraes | Self-Forces on Electric and Magnetic Linear Sources in the Space-Time of
a Cosmic String | 10 pages, LaTeX, to be published in Phys. Rev. D. | Phys.Rev. D51 (1995) 7140-7143 | 10.1103/PhysRevD.51.7140 | null | gr-qc | null | In this paper we calculate the magnetic and electric self-forces, induced by
the conical structure of a cosmic string space-time, on a long straight wire
which presents either a constant current or a linear charge density. We also
show how these self-forces are related by a Lorentz tranformation and, in this
way, exp... | [
{
"created": "Thu, 16 Mar 1995 17:19:13 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"de Mello",
"E. R. Bezerra",
""
],
[
"Bezerra",
"V. B.",
""
],
[
"Furtado",
"C.",
""
],
[
"Moraes",
"F.",
""
]
] | In this paper we calculate the magnetic and electric self-forces, induced by the conical structure of a cosmic string space-time, on a long straight wire which presents either a constant current or a linear charge density. We also show how these self-forces are related by a Lorentz tranformation and, in this way, expla... |
1511.00959 | Salwa Al Saleh | Salwa Al Saleh | Geometric Backreaction of Modified Quantum Vacua and Diffeomorphisim
Covariance | 10 pages, 2 figures | null | 10.4236/jmp.2016.73031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have shown that squeezed modified quantum vacua have an
effect on the background geometry by solving the semi-classical Einstein Field
Equations in modified vacuum. The resultant geometry is similar to (anti) de
Sitter spacetime. This geometry could explain the change of causal structure -
speed of l... | [
{
"created": "Sat, 31 Oct 2015 14:57:22 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2016 12:29:01 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Saleh",
"Salwa Al",
""
]
] | In this paper we have shown that squeezed modified quantum vacua have an effect on the background geometry by solving the semi-classical Einstein Field Equations in modified vacuum. The resultant geometry is similar to (anti) de Sitter spacetime. This geometry could explain the change of causal structure - speed of lig... |
gr-qc/0008039 | Sergio M. C. V. Goncalves | Sergio M. C. V. Goncalves (Caltech) | Black hole formation from massive scalar field collapse in the
Einstein-de Sitter universe | 9 pages, RevTeX, 3 eps figures; to appear in Phys. Rev. D | Phys.Rev. D62 (2000) 124006 | 10.1103/PhysRevD.62.124006 | null | gr-qc | null | We study the spherically symmetric collapse of a real, minimally coupled,
massive scalar field in an asymptotically Einstein-de Sitter spacetime
background. By means of an eikonal approximation for the field and metric
functions, we obtain a simple analytical criterion---involving the physical
size and mass scales (t... | [
{
"created": "Tue, 15 Aug 2000 20:47:05 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Goncalves",
"Sergio M. C. V.",
"",
"Caltech"
]
] | We study the spherically symmetric collapse of a real, minimally coupled, massive scalar field in an asymptotically Einstein-de Sitter spacetime background. By means of an eikonal approximation for the field and metric functions, we obtain a simple analytical criterion---involving the physical size and mass scales (the... |
gr-qc/0404064 | Peter Shawhan | Peter Shawhan and Evan Ochsner | A New Waveform Consistency Test for Gravitational Wave Inspiral Searches | 10 pages, 6 figures, submitted to Classical and Quantum Gravity for
the proceedings of the Eighth Gravitational Wave Data Analysis Workshop
(GWDAW-8) | Class.Quant.Grav. 21 (2004) S1757-S1766 | 10.1088/0264-9381/21/20/018 | null | gr-qc | null | Searches for binary inspiral signals in data collected by interferometric
gravitational wave detectors utilize matched filtering techniques. Although
matched filtering is optimal in the case of stationary Gaussian noise, data
from real detectors often contains "glitches" and episodes of excess noise
which cause filte... | [
{
"created": "Thu, 15 Apr 2004 05:26:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shawhan",
"Peter",
""
],
[
"Ochsner",
"Evan",
""
]
] | Searches for binary inspiral signals in data collected by interferometric gravitational wave detectors utilize matched filtering techniques. Although matched filtering is optimal in the case of stationary Gaussian noise, data from real detectors often contains "glitches" and episodes of excess noise which cause filter ... |
1211.3518 | H. B. Benaoum | H. B. Benaoum | Modified Chaplygin Gas Cosmology | 11 pages | Advances in High Energy Physics 2012:357802, 2012 | 10.1155/2012/357802 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified Chaplygin gas as an exotic fluid has been introduced in [34].
Essential features of the modified Chaplygin gas as a cosmological model are
discussed. Observational constraints on the parameters of the model have been
included. The relationship between the modified Chaplygin gas and a homogeneous
minimally co... | [
{
"created": "Thu, 15 Nov 2012 07:50:23 GMT",
"version": "v1"
}
] | 2012-11-16 | [
[
"Benaoum",
"H. B.",
""
]
] | Modified Chaplygin gas as an exotic fluid has been introduced in [34]. Essential features of the modified Chaplygin gas as a cosmological model are discussed. Observational constraints on the parameters of the model have been included. The relationship between the modified Chaplygin gas and a homogeneous minimally coup... |
1905.06823 | Ben Stefanek | Toby Opferkuch, Pedro Schwaller, Ben A. Stefanek | Ricci Reheating | 9 pages, 6 figures | null | 10.1088/1475-7516/2019/07/016 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a model for viable gravitational reheating involving a scalar
field directly coupled to the Ricci curvature scalar. Crucial to the model is a
period of kination after inflation, which causes the Ricci scalar to change
sign thus inducing a tachyonic effective mass $m^{2} \propto -H^2$ for the
scalar field. ... | [
{
"created": "Tue, 14 May 2019 18:00:00 GMT",
"version": "v1"
}
] | 2019-07-17 | [
[
"Opferkuch",
"Toby",
""
],
[
"Schwaller",
"Pedro",
""
],
[
"Stefanek",
"Ben A.",
""
]
] | We present a model for viable gravitational reheating involving a scalar field directly coupled to the Ricci curvature scalar. Crucial to the model is a period of kination after inflation, which causes the Ricci scalar to change sign thus inducing a tachyonic effective mass $m^{2} \propto -H^2$ for the scalar field. Th... |
2111.07045 | Tyler McMaken | Tyler McMaken | Notes on primordial black hole origin for thermal gamma-ray bursts | 6 pages, 2 figures | null | 10.1093/mnras/stac196 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently, an alleged plausible astrophysical scenario was proposed for the
production of observed thermal gamma-ray bursts, via Hawking radiation emitted
from a primordial black hole (PBH) freely falling into a more massive black
hole. Here the implausibility of that scenario is demonstrated, and the key
flaws in tha... | [
{
"created": "Sat, 13 Nov 2021 05:35:19 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Feb 2022 20:12:59 GMT",
"version": "v2"
}
] | 2022-02-08 | [
[
"McMaken",
"Tyler",
""
]
] | Recently, an alleged plausible astrophysical scenario was proposed for the production of observed thermal gamma-ray bursts, via Hawking radiation emitted from a primordial black hole (PBH) freely falling into a more massive black hole. Here the implausibility of that scenario is demonstrated, and the key flaws in that ... |
1206.2784 | Jorge Ernesto Horvath | Rodrigo Alvares de Souza and J.E. Horvath | Reducing the parameter space for Unparticle-inspired models using white
dwarf masses | 4 pp., 4 Fig., to appear in PRD | null | 10.1103/PhysRevD.86.027502 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on astrophysical constraints derived from Chandrasekhar's mass limit
for white-dwarfs, we study the effects of the model on the parameters of
unparticle-inspired gravity, on scales $\Lambda_U > 1 \; TeV$ and $d_U \approx
1$.
| [
{
"created": "Wed, 13 Jun 2012 12:34:58 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"de Souza",
"Rodrigo Alvares",
""
],
[
"Horvath",
"J. E.",
""
]
] | Based on astrophysical constraints derived from Chandrasekhar's mass limit for white-dwarfs, we study the effects of the model on the parameters of unparticle-inspired gravity, on scales $\Lambda_U > 1 \; TeV$ and $d_U \approx 1$. |
1104.1456 | Alexander Zhuk | Maxim Eingorn and Alexander Zhuk | Weak-field limit of f(R)-gravity in three and more spatial dimensions | 8 pages, Revtex4, no figures | Phys.Rev.D84:024023,2011 | 10.1103/PhysRevD.84.024023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a point-like massive source in non-linear f(R) theories in the
case of arbitrary number of spatial dimensions D\geq 3. If D>3 then extra
dimensions undergo toroidal compactification. We consider a weak-field
approximation with Minkowski and de Sitter background solutions. In both these
cases point-like... | [
{
"created": "Thu, 7 Apr 2011 22:54:07 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jul 2011 20:42:28 GMT",
"version": "v2"
}
] | 2011-08-08 | [
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate a point-like massive source in non-linear f(R) theories in the case of arbitrary number of spatial dimensions D\geq 3. If D>3 then extra dimensions undergo toroidal compactification. We consider a weak-field approximation with Minkowski and de Sitter background solutions. In both these cases point-like m... |
2012.05752 | Rodrigo Tenorio | Rodrigo Tenorio, David Keitel, Alicia M. Sintes | Time-frequency track distance for comparing continuous gravitational
wave signals | 13 pages, 7 figures. Matches PRD published version | Phys. Rev. D 103, 064053 (2021) | 10.1103/PhysRevD.103.064053 | LIGO-P2000493 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for continuous gravitational waves from unknown sources attempt to
detect long-lasting gravitational radiation by identifying Doppler-modulated
signatures in the data. Semicoherent methods allow for wide parameter space
surveys, identifying interesting regions to be followed up using more sensitive
(and comp... | [
{
"created": "Thu, 10 Dec 2020 15:37:03 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2021 13:22:22 GMT",
"version": "v2"
}
] | 2021-03-26 | [
[
"Tenorio",
"Rodrigo",
""
],
[
"Keitel",
"David",
""
],
[
"Sintes",
"Alicia M.",
""
]
] | Searches for continuous gravitational waves from unknown sources attempt to detect long-lasting gravitational radiation by identifying Doppler-modulated signatures in the data. Semicoherent methods allow for wide parameter space surveys, identifying interesting regions to be followed up using more sensitive (and comput... |
2102.09767 | Hiroki Matsui | Hiroki Matsui | Lorentzian path integral for quantum tunneling and WKB approximation for
wave-function | 14 pages, 14 figures; fixed typos, added figures, updated discussion | Eur. Phys. J. C 82, 426 (2022) | 10.1140/epjc/s10052-022-10374-1 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the Lorentzian path integral formulation using the Picard-Lefschetz
theory has attracted much attention in quantum cosmology. In this paper, we
analyze the tunneling amplitude in quantum mechanics by using the Lorentzian
Picard-Lefschetz formulation and compare it with the WKB analysis of the
conventional S... | [
{
"created": "Fri, 19 Feb 2021 07:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Mar 2021 02:51:26 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Apr 2021 01:43:38 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Oct 2021 10:37:52 GMT",
"version": "v4"
}
] | 2022-05-12 | [
[
"Matsui",
"Hiroki",
""
]
] | Recently, the Lorentzian path integral formulation using the Picard-Lefschetz theory has attracted much attention in quantum cosmology. In this paper, we analyze the tunneling amplitude in quantum mechanics by using the Lorentzian Picard-Lefschetz formulation and compare it with the WKB analysis of the conventional Sch... |
2407.05321 | Narges Heidari | N. Heidari, Caio F. B. Macedo, A. A. Ara\'ujo Filho and H.Hassanabadi | Scattering effects of bumblebee gravity in metric affine formalism | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore a Schwarzschild-like black hole within the framework
of metric--affine bumblebee gravity. First, we investigate the behavior of the
Kretschmann scalar and singularities in this modified gravity approach. Next,
we introduce a newly defined time coordinate related to a stationary
asymptotically... | [
{
"created": "Sun, 7 Jul 2024 10:17:25 GMT",
"version": "v1"
}
] | 2024-07-09 | [
[
"Heidari",
"N.",
""
],
[
"Macedo",
"Caio F. B.",
""
],
[
"Filho",
"A. A. Araújo",
""
],
[
"Hassanabadi",
"H.",
""
]
] | In this work, we explore a Schwarzschild-like black hole within the framework of metric--affine bumblebee gravity. First, we investigate the behavior of the Kretschmann scalar and singularities in this modified gravity approach. Next, we introduce a newly defined time coordinate related to a stationary asymptotically f... |
1110.5810 | Rong-Jia Yang | Rongjia Yang | The thermal entropy density of spacetime | 4 pages | Entropy 2013, 15(1), 156-161 | 10.3390/e15010156 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the notion of thermal entropy density, and first obtain the
thermal entropy density of any arbitrary spacetime without firstly assuming a
temperature or a horizon. The results indicate that gravity possesses thermal
effects or therm entropy density possesses effects of gravity. The results also
imply tha... | [
{
"created": "Wed, 26 Oct 2011 14:58:54 GMT",
"version": "v1"
},
{
"created": "Fri, 18 May 2012 15:03:38 GMT",
"version": "v2"
}
] | 2013-01-11 | [
[
"Yang",
"Rongjia",
""
]
] | We introduce the notion of thermal entropy density, and first obtain the thermal entropy density of any arbitrary spacetime without firstly assuming a temperature or a horizon. The results indicate that gravity possesses thermal effects or therm entropy density possesses effects of gravity. The results also imply that,... |
2105.02176 | Wu-Long Xu | Xiaokun Yang, Wu-Long Xu, and Yong-Chang Huang | New general DBI action, its solution to the paradox of the conversion of
kinetic and potential energy in equal rights and their true applications to
inflationary cosmology | 15 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The Dirac-Born-Infeld (DBI) field theory in string theory is important and
can provide the field of the universe's inflation. At the same time, it
provides a causal mechanism for generating the original density perturbation,
thereby providing the necessary density perturbation for existing the dense and
sparse matter... | [
{
"created": "Tue, 4 May 2021 12:44:25 GMT",
"version": "v1"
}
] | 2021-05-06 | [
[
"Yang",
"Xiaokun",
""
],
[
"Xu",
"Wu-Long",
""
],
[
"Huang",
"Yong-Chang",
""
]
] | The Dirac-Born-Infeld (DBI) field theory in string theory is important and can provide the field of the universe's inflation. At the same time, it provides a causal mechanism for generating the original density perturbation, thereby providing the necessary density perturbation for existing the dense and sparse matter d... |
1904.07195 | Grigoris Panotopoulos | Grigoris Panotopoulos and Il\'idio Lopes | Acoustic modes of pulsating axion stars: Non-radial oscillations | 15 pages, 5 figures, 1 table, accepted for publication in IJMPD.
arXiv admin note: text overlap with arXiv:1904.07191 | null | 10.1142/S0218271819501116 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the lowest frequency non-radial oscillation modes of dilute axion
stars. The effective potential that enters into the Schr{\"o}dinger-like
equation, several associated eigenfunctions, and the large as well as the small
frequency separations are shown as well.
| [
{
"created": "Mon, 15 Apr 2019 17:13:50 GMT",
"version": "v1"
}
] | 2019-07-24 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Lopes",
"Ilídio",
""
]
] | We compute the lowest frequency non-radial oscillation modes of dilute axion stars. The effective potential that enters into the Schr{\"o}dinger-like equation, several associated eigenfunctions, and the large as well as the small frequency separations are shown as well. |
1408.4127 | Astrid Eichhorn | Astrid Eichhorn, Tim Koslowski | Towards phase transitions between discrete and continuum quantum
spacetime from the Renormalization Group | 14 pages, 1 figure | Phys. Rev. D 90, 104039 (2014) | 10.1103/PhysRevD.90.104039 | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the functional Renormalization Group as an exploratory tool to
investigate a possible phase transition between a pre-geometric discrete phase
and a geometric continuum phase in quantum gravity. In this paper, based on the
analysis of [1], we study three new aspects of the double-scaling limit of
matrix m... | [
{
"created": "Mon, 18 Aug 2014 20:00:24 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Aug 2014 09:56:22 GMT",
"version": "v2"
}
] | 2014-12-03 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Koslowski",
"Tim",
""
]
] | We establish the functional Renormalization Group as an exploratory tool to investigate a possible phase transition between a pre-geometric discrete phase and a geometric continuum phase in quantum gravity. In this paper, based on the analysis of [1], we study three new aspects of the double-scaling limit of matrix mod... |
2405.06012 | Bruno Bucciotti | Bruno Bucciotti, Leonardo Juliano, Adrien Kuntz, Enrico Trincherini | Quadratic Quasi-Normal Modes of a Schwarzschild Black Hole | 5 pages, 2 figures | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Quadratic quasi-normal modes, generated at second order in black hole
perturbation theory, are a promising target for testing gravity in the
nonlinear regime with next-generation gravitational wave detectors. While their
frequencies have long been known, their amplitudes remain poorly studied. We
introduce regular va... | [
{
"created": "Thu, 9 May 2024 18:00:00 GMT",
"version": "v1"
}
] | 2024-05-13 | [
[
"Bucciotti",
"Bruno",
""
],
[
"Juliano",
"Leonardo",
""
],
[
"Kuntz",
"Adrien",
""
],
[
"Trincherini",
"Enrico",
""
]
] | Quadratic quasi-normal modes, generated at second order in black hole perturbation theory, are a promising target for testing gravity in the nonlinear regime with next-generation gravitational wave detectors. While their frequencies have long been known, their amplitudes remain poorly studied. We introduce regular vari... |
2112.11695 | Shambel Sahlu Akalu | Shambel Sahlu, Heba Sami, Renier Hough, Maye Elmardi, Anna-Mia Swart,
Amare Abebe | Confronting the Chaplygin gas with data: background and perturbed cosmic
dynamics | Accepted: International Journal of Modern Physics D 41 pages, 25
figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we undertake a unified study of background dynamics and
cosmological perturbations in the presence of the Chaplygin gas. This is done
by first constraining the background cosmological parameters of different
Chaplygin gas models with SNIa and $H(z)$ data for detailed statistical
analysis of the CG mode... | [
{
"created": "Wed, 22 Dec 2021 06:55:41 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Oct 2023 10:26:23 GMT",
"version": "v2"
}
] | 2023-10-12 | [
[
"Sahlu",
"Shambel",
""
],
[
"Sami",
"Heba",
""
],
[
"Hough",
"Renier",
""
],
[
"Elmardi",
"Maye",
""
],
[
"Swart",
"Anna-Mia",
""
],
[
"Abebe",
"Amare",
""
]
] | In this paper, we undertake a unified study of background dynamics and cosmological perturbations in the presence of the Chaplygin gas. This is done by first constraining the background cosmological parameters of different Chaplygin gas models with SNIa and $H(z)$ data for detailed statistical analysis of the CG models... |
2101.02608 | Philip D. Mannheim | Asanka Amarasinghe, Tianye Liu, Daniel A. Norman and Philip D.
Mannheim | Exact solution to perturbative conformal cosmology from recombination
until the current era | 23 pages. arXiv admin note: substantial text overlap with
arXiv:2009.06841 | Phys. Rev. D 103, 104022 (2021) | 10.1103/PhysRevD.103.104022 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper (P. D. Mannheim, Phys. Rev. D 102, 123535 (2020)) we
studied cosmological perturbation theory in the cosmology associated with the
fourth-order derivative conformal gravity theory, and provided an exact
solution to the theory in the recombination era. In this paper we present an
exact solution tha... | [
{
"created": "Thu, 7 Jan 2021 16:16:09 GMT",
"version": "v1"
}
] | 2021-05-19 | [
[
"Amarasinghe",
"Asanka",
""
],
[
"Liu",
"Tianye",
""
],
[
"Norman",
"Daniel A.",
""
],
[
"Mannheim",
"Philip D.",
""
]
] | In a previous paper (P. D. Mannheim, Phys. Rev. D 102, 123535 (2020)) we studied cosmological perturbation theory in the cosmology associated with the fourth-order derivative conformal gravity theory, and provided an exact solution to the theory in the recombination era. In this paper we present an exact solution that ... |
2009.04967 | Antonio Gallerati | Giovanni Alberto Ummarino, Antonio Gallerati | Josephson AC effect induced by weak gravitational field | 9 pages, 3 figures | Class. Quantum Grav. 37 (2020) 21, 217001 | 10.1088/1361-6382/abb57b | null | gr-qc cond-mat.supr-con hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we examine the possibility of a Josephson AC effect between two
superconductors induced by the Earth's gravitational field, making use of the
gravito-Maxwell formalism. The theoretical framework exploits the symmetry
between the weak field expansion of the gravitational field and the standard
Maxwell fo... | [
{
"created": "Thu, 10 Sep 2020 16:16:25 GMT",
"version": "v1"
}
] | 2020-10-07 | [
[
"Ummarino",
"Giovanni Alberto",
""
],
[
"Gallerati",
"Antonio",
""
]
] | In this paper we examine the possibility of a Josephson AC effect between two superconductors induced by the Earth's gravitational field, making use of the gravito-Maxwell formalism. The theoretical framework exploits the symmetry between the weak field expansion of the gravitational field and the standard Maxwell form... |
gr-qc/0511148 | Jakob Lamey | Jakob Lamey and Gustav M. Obermair | Local effects of global gravitation | 7 pages, revtex4 | null | null | null | gr-qc astro-ph quant-ph | null | In what respect does terrestrial physics reflect the two unique features of
the global gravitational field: its infinite range and its equivalence to
spacetime curvature? We quote the evidence that true irreversibility, i.e the
growth of the Boltzmann entropy of any finite system, is the consequence of the
global sta... | [
{
"created": "Mon, 28 Nov 2005 12:11:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lamey",
"Jakob",
""
],
[
"Obermair",
"Gustav M.",
""
]
] | In what respect does terrestrial physics reflect the two unique features of the global gravitational field: its infinite range and its equivalence to spacetime curvature? We quote the evidence that true irreversibility, i.e the growth of the Boltzmann entropy of any finite system, is the consequence of the global state... |
1909.00068 | Heling Deng | Jose J. Blanco-Pillado, Heling Deng and Alexander Vilenkin | Eternal Inflation in Swampy Landscapes | 36 pages, 11 figures | null | 10.1088/1475-7516/2020/05/014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The much-discussed swampland conjectures suggest significant constraints on
the properties of string theory landscape and on the nature of the multiverse
that this landscape can support. The conjectures are especially constraining
for models of inflation; in particular, they exclude the existence of de Sitter
(dS) va... | [
{
"created": "Fri, 30 Aug 2019 20:54:50 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2019 19:44:17 GMT",
"version": "v2"
}
] | 2020-05-20 | [
[
"Blanco-Pillado",
"Jose J.",
""
],
[
"Deng",
"Heling",
""
],
[
"Vilenkin",
"Alexander",
""
]
] | The much-discussed swampland conjectures suggest significant constraints on the properties of string theory landscape and on the nature of the multiverse that this landscape can support. The conjectures are especially constraining for models of inflation; in particular, they exclude the existence of de Sitter (dS) vacu... |
2204.04647 | Polina Petriakova | Polina Petriakova and Sergey G. Rubin | Self-tuning inflation | Accepted version in the Eur. Phys. J. C | Eur. Phys. J. C 82, 1048 (2022) | 10.1140/epjc/s10052-022-10983-w | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We develop an inflationary model without small parameters on the basis of
multidimensional $f(R)$ gravity with a minimally coupled scalar field. The
model is described by two stages of space expansion. The first one begins at
energy scales about the D-dimensional Planck mass and ends with the de Sitter
metric of our ... | [
{
"created": "Sun, 10 Apr 2022 10:45:10 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2022 11:55:34 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Nov 2022 13:35:45 GMT",
"version": "v3"
}
] | 2022-11-22 | [
[
"Petriakova",
"Polina",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We develop an inflationary model without small parameters on the basis of multidimensional $f(R)$ gravity with a minimally coupled scalar field. The model is described by two stages of space expansion. The first one begins at energy scales about the D-dimensional Planck mass and ends with the de Sitter metric of our sp... |
gr-qc/0403037 | Alexander I. Nesterov | N V Mitskievich and A I Nesterov | Geometric phase shift for detection of gravitational radiation | LaTeX2e, 12 pp | Int.J.Theor.Phys. 35 (1996) 2645-2659 | 10.1007/BF02085770 | null | gr-qc hep-th quant-ph | null | An effect of geometrical phase shift is predicted for a light beam
propagating in the field of a gravitational wave. Gravitational radiation
detection experiments are proposed using this new effect, the corresponding
estimates being given.
| [
{
"created": "Tue, 9 Mar 2004 04:49:13 GMT",
"version": "v1"
}
] | 2012-11-15 | [
[
"Mitskievich",
"N V",
""
],
[
"Nesterov",
"A I",
""
]
] | An effect of geometrical phase shift is predicted for a light beam propagating in the field of a gravitational wave. Gravitational radiation detection experiments are proposed using this new effect, the corresponding estimates being given. |
2003.06810 | Dipanjan Dey | Dipanjan Dey, Rajibul Shaikh, Pankaj S. Joshi | Perihelion Precession and Shadows near Blackholes and Naked
Singularities | 9 pages, 16 figures | Phys. Rev. D 102, 044042 (2020) | 10.1103/PhysRevD.102.044042 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It is now known that, apart from black holes, some naked singularities can
also cast shadows which provide their possible observable signatures. We
examine the relevant question here as to how to distinguish then these entities
from each other, in terms of further physical signatures. We point out that
black holes al... | [
{
"created": "Sun, 15 Mar 2020 12:23:51 GMT",
"version": "v1"
}
] | 2020-09-02 | [
[
"Dey",
"Dipanjan",
""
],
[
"Shaikh",
"Rajibul",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | It is now known that, apart from black holes, some naked singularities can also cast shadows which provide their possible observable signatures. We examine the relevant question here as to how to distinguish then these entities from each other, in terms of further physical signatures. We point out that black holes alwa... |
2108.04050 | Vasilis Oikonomou | V.K. Oikonomou | Power-Law $f(R)$ Gravity Corrected Canonical Scalar Field Inflation | AoP Accepted | null | 10.1016/j.aop.2021.168576 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effective inflationary Lagrangian is a prominent challenge for
theoretical cosmologists, since it may contain imprints of the quantum epoch.
In view of the fact that higher order curvature terms might be present in the
effective inflationary Lagrangian, in this work we introduce the theoretical
framework of power... | [
{
"created": "Mon, 9 Aug 2021 14:02:52 GMT",
"version": "v1"
}
] | 2021-09-15 | [
[
"Oikonomou",
"V. K.",
""
]
] | The effective inflationary Lagrangian is a prominent challenge for theoretical cosmologists, since it may contain imprints of the quantum epoch. In view of the fact that higher order curvature terms might be present in the effective inflationary Lagrangian, in this work we introduce the theoretical framework of power-l... |
1712.05062 | Piero Nicolini | Piero Nicolini | Planckian charged black holes in ultraviolet self-complete quantum
gravity | 15 pages, v2: version in press on Physics Letters B | Physics Letters B 778 (2018) 88-93 | 10.1016/j.physletb.2018.01.013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an analysis of the role of the charge within the self-complete
quantum gravity paradigm. By studying the classicalization of generic
ultraviolet improved charged black hole solutions around the Planck scale, we
showed that the charge introduces important differences with respect to the
neutral case. First,... | [
{
"created": "Thu, 14 Dec 2017 00:40:42 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jan 2018 17:23:10 GMT",
"version": "v2"
}
] | 2018-01-31 | [
[
"Nicolini",
"Piero",
""
]
] | We present an analysis of the role of the charge within the self-complete quantum gravity paradigm. By studying the classicalization of generic ultraviolet improved charged black hole solutions around the Planck scale, we showed that the charge introduces important differences with respect to the neutral case. First, t... |
gr-qc/0505100 | James Van Meter phd | John G. Baker, James R. van Meter | Reducing reflections from mesh refinement interfaces in numerical
relativity | 7 pages | Phys.Rev. D72 (2005) 104010 | 10.1103/PhysRevD.72.104010 | null | gr-qc | null | Full interpretation of data from gravitational wave observations will require
accurate numerical simulations of source systems, particularly binary black
hole mergers. A leading approach to improving accuracy in numerical relativity
simulations of black hole systems is through fixed or adaptive mesh refinement
techni... | [
{
"created": "Thu, 19 May 2005 18:59:32 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Baker",
"John G.",
""
],
[
"van Meter",
"James R.",
""
]
] | Full interpretation of data from gravitational wave observations will require accurate numerical simulations of source systems, particularly binary black hole mergers. A leading approach to improving accuracy in numerical relativity simulations of black hole systems is through fixed or adaptive mesh refinement techniqu... |
1712.05699 | Sebasti\'an Bahamonde | M. Zubair, Farzana Kousar, Sebastian Bahamonde | Static spherically symmetric wormholes in generalized $f(R,\phi)$
gravity | Matches published version | Eur. Phys. J. Plus (2018) 133: 523 | 10.1140/epjp/i2018-12344-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine static spherically symmetric wormhole solutions in
generalized $f(R,\phi)$ gravity. To do this, we consider three different kinds
of fluids: anisotropic, barotropic and isotropic. We explore different
$f(R,\phi)$ models and inspect the energy conditions for all of those three
fluids. It is f... | [
{
"created": "Fri, 15 Dec 2017 15:09:37 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Dec 2018 22:25:14 GMT",
"version": "v2"
}
] | 2018-12-19 | [
[
"Zubair",
"M.",
""
],
[
"Kousar",
"Farzana",
""
],
[
"Bahamonde",
"Sebastian",
""
]
] | In this paper, we examine static spherically symmetric wormhole solutions in generalized $f(R,\phi)$ gravity. To do this, we consider three different kinds of fluids: anisotropic, barotropic and isotropic. We explore different $f(R,\phi)$ models and inspect the energy conditions for all of those three fluids. It is fou... |
1602.03433 | Jaume Haro | Jaume de Haro and Emilio Elizalde | Inflation and late-time acceleration from a double-well potential with
cosmological constant | 10 pages, 1 figure. Version accepted for publication in GERG | GERG 48, (2016) 77 | 10.1007/s10714-016-2072-z | 1602.03433 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model of a universe without big bang singularity is presented, which
displaysanearly inflationary period ending just before a phase transition to a
deflationary epoch. The model produces enough heavy particles so as to reheat
the universe at temperatures in the MeV regime. After the reheating, it
smoothly matches t... | [
{
"created": "Wed, 10 Feb 2016 16:31:17 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2016 07:20:27 GMT",
"version": "v2"
}
] | 2016-09-05 | [
[
"de Haro",
"Jaume",
""
],
[
"Elizalde",
"Emilio",
""
]
] | A model of a universe without big bang singularity is presented, which displaysanearly inflationary period ending just before a phase transition to a deflationary epoch. The model produces enough heavy particles so as to reheat the universe at temperatures in the MeV regime. After the reheating, it smoothly matches the... |
gr-qc/9709025 | Chris Chambers | Chris M. Chambers (Montana State) | The Cauchy Horizon In Black Hole-de Sitter Spacetimes | 35 pages (including 15 eps figures), RevTex. Uses header.sty
(included). To be published in the proceedings of the workshop on ``The
Internal Structure of Black Holes and Spacetime Singularities", held at the
Technion -- Israel Institute of Technology, Haifa, Israel. June 29 - July 3,
1997 | null | null | MSUPHY9716 | gr-qc | null | The last seven years has produced a growing body of evidence which concludes
that the Cauchy horizon in black hole-de Sitter spacetimes is classically
stable when the surface gravity at the cosmological event horizon is greater
than that at the Cauchy horizon. That stability persists for a finite, but
non-zero, regio... | [
{
"created": "Thu, 11 Sep 1997 20:09:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chambers",
"Chris M.",
"",
"Montana State"
]
] | The last seven years has produced a growing body of evidence which concludes that the Cauchy horizon in black hole-de Sitter spacetimes is classically stable when the surface gravity at the cosmological event horizon is greater than that at the Cauchy horizon. That stability persists for a finite, but non-zero, region ... |
1505.06029 | Seiju Ohashi | Seiju Ohashi, Norihiro Tanahashi, Tsutomu Kobayashi and Masahide
Yamaguchi | The most general second-order field equations of bi-scalar-tensor theory
in four dimensions | 21 pages | JHEP 1507:008,2015 | null | KEK-TH-1826, RUP-15-11 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Horndeski theory is known as the most general scalar-tensor theory with
second-order field equations. In this paper, we explore the bi-scalar extension
of the Horndeski theory. Following Horndeski's approach, we determine all the
possible terms appearing in the second-order field equations of the
bi-scalar-tensor... | [
{
"created": "Fri, 22 May 2015 11:11:50 GMT",
"version": "v1"
}
] | 2015-10-27 | [
[
"Ohashi",
"Seiju",
""
],
[
"Tanahashi",
"Norihiro",
""
],
[
"Kobayashi",
"Tsutomu",
""
],
[
"Yamaguchi",
"Masahide",
""
]
] | The Horndeski theory is known as the most general scalar-tensor theory with second-order field equations. In this paper, we explore the bi-scalar extension of the Horndeski theory. Following Horndeski's approach, we determine all the possible terms appearing in the second-order field equations of the bi-scalar-tensor t... |
1912.04213 | Thomas Buchert | Thomas Buchert, Pierre Mourier, Xavier Roy | On average properties of inhomogeneous fluids in general relativity III:
general fluid cosmologies | 67 pages, 4 figures, 1 table; matches published version in GRG as
`Editor's Choice Research Article' | Gen. Rel. Grav. 52 (2020) 27 | 10.1007/s10714-020-02670-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate effective equations governing the volume expansion of
spatially averaged portions of inhomogeneous cosmologies in spacetimes filled
with an arbitrary fluid. This work is a follow-up to previous studies focused
on irrotational dust models (Paper I) and irrotational perfect fluids (Paper
II) in flow-orth... | [
{
"created": "Mon, 9 Dec 2019 17:51:06 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Mar 2020 16:20:45 GMT",
"version": "v2"
}
] | 2020-03-16 | [
[
"Buchert",
"Thomas",
""
],
[
"Mourier",
"Pierre",
""
],
[
"Roy",
"Xavier",
""
]
] | We investigate effective equations governing the volume expansion of spatially averaged portions of inhomogeneous cosmologies in spacetimes filled with an arbitrary fluid. This work is a follow-up to previous studies focused on irrotational dust models (Paper I) and irrotational perfect fluids (Paper II) in flow-orthog... |
1203.2590 | Tobias Ramming | Tobias Ramming and Gerhard Rein | Spherically symmetric equilibria for self-gravitating kinetic or fluid
models in the non-relativistic and relativistic case - A simple proof for
finite extension | 20 pages | SIAM J. MATH. ANAL., Vol. 45 (2013), No. 2, pp.900-914 | 10.1137/120896712 | null | gr-qc astro-ph.GA math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a self-gravitating collisionless gas as described by the
Vlasov-Poisson or Einstein-Vlasov system or a self-gravitating fluid ball as
described by the Euler-Poisson or Einstein-Euler system. We give a simple proof
for the finite extension of spherically symmetric equilibria, which covers all
these models ... | [
{
"created": "Mon, 12 Mar 2012 19:15:05 GMT",
"version": "v1"
}
] | 2013-12-16 | [
[
"Ramming",
"Tobias",
""
],
[
"Rein",
"Gerhard",
""
]
] | We consider a self-gravitating collisionless gas as described by the Vlasov-Poisson or Einstein-Vlasov system or a self-gravitating fluid ball as described by the Euler-Poisson or Einstein-Euler system. We give a simple proof for the finite extension of spherically symmetric equilibria, which covers all these models si... |
0712.0993 | Kostyantyn Ropotenko | K. Ropotenko | The Poincar\'e recurrence time for the de Sitter space with dynamical
chaos | 5 pages, no figures | null | null | null | gr-qc | null | For an ordinary thermodynamical system the Poincar\'{e} recurrence time is
exponentially large in the Boltzmann entropy of the system. It turns out, that
for a system with dynamical chaos it is determined by the Kolmogorov-Sinai
entropy and can be considerably shorter. It is shown in this note that for the
de Sitter ... | [
{
"created": "Thu, 6 Dec 2007 16:53:09 GMT",
"version": "v1"
}
] | 2007-12-07 | [
[
"Ropotenko",
"K.",
""
]
] | For an ordinary thermodynamical system the Poincar\'{e} recurrence time is exponentially large in the Boltzmann entropy of the system. It turns out, that for a system with dynamical chaos it is determined by the Kolmogorov-Sinai entropy and can be considerably shorter. It is shown in this note that for the de Sitter sp... |
1704.08685 | Georgios Moschidis | Georgios Moschidis | The Einstein--null dust system in spherical symmetry with an inner
mirror: structure of the maximal development and Cauchy stability | 80 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the evolution of asymptotically AdS initial data for
the spherically symmetric Einstein--massless Vlasov system for $\Lambda<0$,
with reflecting boundary conditions imposed on timelike infinity $\mathcal{I}$,
in the case when the Vlasov field is supported only on radial geodesics. This
system ... | [
{
"created": "Thu, 27 Apr 2017 17:55:43 GMT",
"version": "v1"
}
] | 2017-05-01 | [
[
"Moschidis",
"Georgios",
""
]
] | In this paper, we study the evolution of asymptotically AdS initial data for the spherically symmetric Einstein--massless Vlasov system for $\Lambda<0$, with reflecting boundary conditions imposed on timelike infinity $\mathcal{I}$, in the case when the Vlasov field is supported only on radial geodesics. This system is... |
2308.05491 | Tanisha Joshi | Tanisha Joshi, S.D Pathak | Interacting Tachyonic Scalar Field III | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study explores the plausibility of an interacting tachyonic scalar,
homogeneous in nature, as a promising candidate for dynamic dark energy,
offering insights into the observed accelerated expansion of the universe. The
parameterization of the interaction between the tachyonic field, matter, and
Hubble's paramet... | [
{
"created": "Thu, 10 Aug 2023 10:38:45 GMT",
"version": "v1"
}
] | 2023-08-11 | [
[
"Joshi",
"Tanisha",
""
],
[
"Pathak",
"S. D",
""
]
] | This study explores the plausibility of an interacting tachyonic scalar, homogeneous in nature, as a promising candidate for dynamic dark energy, offering insights into the observed accelerated expansion of the universe. The parameterization of the interaction between the tachyonic field, matter, and Hubble's parameter... |
2307.03151 | Vittorio De Falco Dr | Vittorio De Falco | Epicyclic frequencies in the equatorial plane around stationary and
axially symmetric wormhole geometries | 10 pages, 2 figures, 2 Tables; accepted for publication in Phys. Rev.
D | Phys. Rev. D 108, 024051, Published 20 July 2023 | 10.1103/PhysRevD.108.024051 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Epicyclic frequencies are usually observed in X-ray binaries and constitute a
powerful astrophysical mean to probe the strong gravitational field around a
compact object. We consider them in the equatorial plane around a general
stationary and axially symmetric wormhole. We first search for the wormholes'
existence, ... | [
{
"created": "Thu, 6 Jul 2023 17:26:23 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jul 2023 08:43:18 GMT",
"version": "v2"
}
] | 2023-07-24 | [
[
"De Falco",
"Vittorio",
""
]
] | Epicyclic frequencies are usually observed in X-ray binaries and constitute a powerful astrophysical mean to probe the strong gravitational field around a compact object. We consider them in the equatorial plane around a general stationary and axially symmetric wormhole. We first search for the wormholes' existence, di... |
gr-qc/0409116 | L. C. Garcia de Andrade | L.C.Garcia de Andrade (Departamento de Fisica Teorica-IF-UERJ-Brasil) | Non-Riemannian vortex geometry of rotational viscous fluids and breaking
of the acoustic Lorentz invariance | null | null | 10.1016/j.physleta.2005.02.076 | null | gr-qc | null | Acoustic torsion recently introduced in the literature (Garcia de
Andrade,PRD(2004),7,64004) is extended to rotational incompressible viscous
fluids represented by the generalised Navier-Stokes equation. The fluid
background is compared with the Riemann-Cartan massless scalar wave equation,
allowing for the generaliz... | [
{
"created": "Wed, 29 Sep 2004 23:29:38 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"de Andrade",
"L. C. Garcia",
"",
"Departamento de Fisica Teorica-IF-UERJ-Brasil"
]
] | Acoustic torsion recently introduced in the literature (Garcia de Andrade,PRD(2004),7,64004) is extended to rotational incompressible viscous fluids represented by the generalised Navier-Stokes equation. The fluid background is compared with the Riemann-Cartan massless scalar wave equation, allowing for the generalizat... |
gr-qc/0007069 | Fran De Aquino | Fran De Aquino (Maranhao State University, Brazil) | How to Extract Energy Directly from a Gravitational Field | 4 pages(1 figure), PDF.Optional e-mail address for comments:
deaquino@elo.com.br | J.New Energy 6:4-10,2001 | null | null | gr-qc | null | Gravity is related to gravitational mass of the bodies. According to the weak
form of Einstein's General Relativity equivalence principle, the gravitational
and inertial masses are equivalent. However recent calculations (gr-qc/9910036)
have revealed that they are correlated by an adimensional factor, which depends
o... | [
{
"created": "Tue, 25 Jul 2000 19:51:44 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"De Aquino",
"Fran",
"",
"Maranhao State University, Brazil"
]
] | Gravity is related to gravitational mass of the bodies. According to the weak form of Einstein's General Relativity equivalence principle, the gravitational and inertial masses are equivalent. However recent calculations (gr-qc/9910036) have revealed that they are correlated by an adimensional factor, which depends on ... |
gr-qc/0302067 | Kayll Lake | Kayll Lake | Galactic Potentials | A somewhat longer form of the final version to appear in Physical
Review Letters.Clarification and further references | Phys.Rev.Lett. 92 (2004) 051101 | 10.1103/PhysRevLett.92.051101 | null | gr-qc astro-ph | null | The information contained in galactic rotation curves is examined under a
minimal set of assumptions. If emission occurs from stable circular geodesic
orbits of a static spherically symmetric field, with information propagated to
us along null geodesics, observed rotation curves determine galactic potentials
without ... | [
{
"created": "Mon, 17 Feb 2003 21:53:37 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Feb 2003 17:14:42 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Jul 2003 19:32:55 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Dec 2003 20:19:30 GMT",
"version": "v4"
},
{
"c... | 2009-11-10 | [
[
"Lake",
"Kayll",
""
]
] | The information contained in galactic rotation curves is examined under a minimal set of assumptions. If emission occurs from stable circular geodesic orbits of a static spherically symmetric field, with information propagated to us along null geodesics, observed rotation curves determine galactic potentials without sp... |
1102.5332 | Travis Garrett | Travis Garrett | Binary Inspirals in Nordstr\"om's Second Theory | 12 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate Nordstr\"om's second theory of gravitation, with a focus on
utilizing it as a testbed for developing techniques in numerical relativity.
Numerical simulations of inspiraling compact star binaries are performed for
this theory, and compared to the predictions of semi-analytic calculations
(which are sim... | [
{
"created": "Fri, 25 Feb 2011 20:40:37 GMT",
"version": "v1"
}
] | 2011-02-28 | [
[
"Garrett",
"Travis",
""
]
] | We investigate Nordstr\"om's second theory of gravitation, with a focus on utilizing it as a testbed for developing techniques in numerical relativity. Numerical simulations of inspiraling compact star binaries are performed for this theory, and compared to the predictions of semi-analytic calculations (which are simil... |
1407.6224 | Masashi Kimura | Masashi Kimura, Hideki Ishihara, Ken Matsuno and Takahiro Tanaka | A simple diagnosis of non-smoothness of black hole horizon: Curvature
singularity at horizons in extremal Kaluza-Klein black holes | 26 pages, 2 figures, v2: discussions improved, v3: minor revisions,
to appear in Classical and Quantum Gravity | null | 10.1088/0264-9381/32/1/015005 | OCU-PHYS 406, AP-GR 112, KUNS-2507, YITP-14-60 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a simple method to prove non-smoothness of a black hole horizon.
The existence of a $C^1$ extension across the horizon implies that there is no
$C^{N + 2}$ extension across the horizon if some components of $N$-th covariant
derivative of Riemann tensor diverge at the horizon in the coordinates of the
$C^1$... | [
{
"created": "Wed, 23 Jul 2014 14:05:43 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Aug 2014 13:40:10 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Oct 2014 15:27:26 GMT",
"version": "v3"
}
] | 2015-06-22 | [
[
"Kimura",
"Masashi",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Matsuno",
"Ken",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We propose a simple method to prove non-smoothness of a black hole horizon. The existence of a $C^1$ extension across the horizon implies that there is no $C^{N + 2}$ extension across the horizon if some components of $N$-th covariant derivative of Riemann tensor diverge at the horizon in the coordinates of the $C^1$ e... |
2212.09607 | Faisal Javed | Faisal Javed, G. Fatima, G. Mustafa, Ali Ovgun | Effects of Variable Equations of State on the Stability of Nonlinear
Electrodynamics Thin-Shell Wormholes | null | Int.J.Geom.Meth.Mod.Phys. Vol. 20, No. 01, 2350010 (2023) | 10.1142/S021988782350010X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the role of nonlinear electrodynamics on the stable
configuration of thin-shell wormholes formulated from two equivalent geometries
of Reissner-Nordstr\"om black hole with nonlinear electrodynamics. For this
purpose, we use cut and paste approach to eliminate the central singularity and
event hori... | [
{
"created": "Mon, 19 Dec 2022 16:45:01 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Javed",
"Faisal",
""
],
[
"Fatima",
"G.",
""
],
[
"Mustafa",
"G.",
""
],
[
"Ovgun",
"Ali",
""
]
] | This paper explores the role of nonlinear electrodynamics on the stable configuration of thin-shell wormholes formulated from two equivalent geometries of Reissner-Nordstr\"om black hole with nonlinear electrodynamics. For this purpose, we use cut and paste approach to eliminate the central singularity and event horizo... |
1501.04598 | Jonathan Luk | Jonathan Luk and Sung-Jin Oh | Proof of linear instability of the Reissner-Nordstr\"om Cauchy horizon
under scalar perturbations | null | Duke Math. J. 166, no. 3 (2017), 437-493 | 10.1215/00127094-3715189 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has long been suggested that solutions to linear scalar wave equation
$$\Box_g\phi=0$$ on a fixed subextremal Reissner-Nordstr\"om spacetime with
non-vanishing charge are generically singular at the Cauchy horizon. We prove
that generic smooth and compactly supported initial data on a Cauchy
hypersurface indeed gi... | [
{
"created": "Mon, 19 Jan 2015 19:30:32 GMT",
"version": "v1"
}
] | 2017-03-01 | [
[
"Luk",
"Jonathan",
""
],
[
"Oh",
"Sung-Jin",
""
]
] | It has long been suggested that solutions to linear scalar wave equation $$\Box_g\phi=0$$ on a fixed subextremal Reissner-Nordstr\"om spacetime with non-vanishing charge are generically singular at the Cauchy horizon. We prove that generic smooth and compactly supported initial data on a Cauchy hypersurface indeed give... |
1004.4681 | Juan Manuel Garcia-Islas | J.Manuel Garcia-Islas | Entropy in Spin Foam Models: The Statistical Calculation | 11 pages, 1 figure | Class.Quant.Grav.27:145020,2010 | 10.1088/0264-9381/27/14/145020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently an idea for computing the entropy of black holes in the spin foam
formalism has been introduced. Particularly complete calculations for the three
dimensional euclidean BTZ black hole were done. The whole calculation is based
on observables living at the horizon of the black hole universe. Departing from
this... | [
{
"created": "Mon, 26 Apr 2010 23:57:41 GMT",
"version": "v1"
}
] | 2012-06-12 | [
[
"Garcia-Islas",
"J. Manuel",
""
]
] | Recently an idea for computing the entropy of black holes in the spin foam formalism has been introduced. Particularly complete calculations for the three dimensional euclidean BTZ black hole were done. The whole calculation is based on observables living at the horizon of the black hole universe. Departing from this i... |
2405.08167 | Adam Zenon Kaczmarek | Adam Z. Kaczmarek, Dominik Szcz\k{e}\'sniak, Zygmunt B\k{a}k | Coherence of multipartite quantum states in the black hole quantum
atmosphere | 8 pages, 3 figures | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | According to the recently introduced concept of quantum atmosphere, the black
hole radiation is suggested to originate from the quantum excitations at the
effective distance ($r$) near the event horizon ($r_H$). Here, this concept is
explored from the quantum resource perspective by analysing the coherence of
multipa... | [
{
"created": "Mon, 13 May 2024 20:22:52 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Kaczmarek",
"Adam Z.",
""
],
[
"Szczęśniak",
"Dominik",
""
],
[
"Bąk",
"Zygmunt",
""
]
] | According to the recently introduced concept of quantum atmosphere, the black hole radiation is suggested to originate from the quantum excitations at the effective distance ($r$) near the event horizon ($r_H$). Here, this concept is explored from the quantum resource perspective by analysing the coherence of multipart... |
1910.08213 | Bruce Allen | Bruce Allen | Gravitational wave stochastic background from cosmological particle
decay | Final published version (Open Access) | Phys. Rev. Research 2, 012034 (2020) | 10.1103/PhysRevResearch.2.012034 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We assume that the cosmological dark matter is composed of massive neutral
scalar particles that decay into two massless particles. The decay produces a
stochastic background of gravitational waves (GWs) via a 'memory effect'
mechanism. We calculate the spectral amplitude and slope of the resulting
background, which ... | [
{
"created": "Fri, 18 Oct 2019 01:06:51 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Nov 2019 15:32:40 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Feb 2020 12:43:45 GMT",
"version": "v3"
}
] | 2020-02-14 | [
[
"Allen",
"Bruce",
""
]
] | We assume that the cosmological dark matter is composed of massive neutral scalar particles that decay into two massless particles. The decay produces a stochastic background of gravitational waves (GWs) via a 'memory effect' mechanism. We calculate the spectral amplitude and slope of the resulting background, which is... |
2107.11375 | Phongpichit Channuie | Daris Samart (Khon Kaen U.), Takol Tangphati (Walailak U.),
Phongpichit Channuie (Walailak U.) | Charged traversable wormholes supported by Casimir energy with and
without GUP corrections | 27 pages, many figures, discussion and references added, version
accepted by Nuclear Physics B | Nuclear Physics B 980 (2022) 115848 | 10.1016/j.nuclphysb.2022.115848 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate new exact and analytic solutions of the
Einstein Maxwell field equations describing Casimir wormholes with and without
the effect of the Generalized Uncertainty Principle (GUP). We consider a
specific type of the GUP relations and study three specific models of the
redshift function alon... | [
{
"created": "Fri, 23 Jul 2021 17:56:12 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2022 13:24:50 GMT",
"version": "v2"
}
] | 2022-06-03 | [
[
"Samart",
"Daris",
"",
"Khon Kaen U."
],
[
"Tangphati",
"Takol",
"",
"Walailak U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | In this paper, we investigate new exact and analytic solutions of the Einstein Maxwell field equations describing Casimir wormholes with and without the effect of the Generalized Uncertainty Principle (GUP). We consider a specific type of the GUP relations and study three specific models of the redshift function along ... |
gr-qc/0403084 | John Barrow | John D. Barrow | Sudden Future Singularities | 5 pages, no figures. Additional discussion, references, and
acknowledgements, eqn. typo corrected: published version | Class.Quant.Grav.21:L79-L82,2004 | 10.1088/0264-9381/21/11/L03 | null | gr-qc astro-ph | null | We show that a singularity can occur at a finite future time in an expanding
Friedmann universe even when the density is positive and the density plus the
sum of the principal pressures is positive. Explicit examples are constructed
and a simple condition is given which can be used to eliminate behaviour of
this sort... | [
{
"created": "Fri, 19 Mar 2004 10:17:02 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Apr 2004 17:01:08 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Apr 2004 15:46:29 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Barrow",
"John D.",
""
]
] | We show that a singularity can occur at a finite future time in an expanding Friedmann universe even when the density is positive and the density plus the sum of the principal pressures is positive. Explicit examples are constructed and a simple condition is given which can be used to eliminate behaviour of this sort i... |
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