id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9801023 | null | Brendan S. Guilfoyle and Brien C. Nolan | Yang's gravitational theory | 28 pages, to appear in Gen. Rel. Grav | Gen.Rel.Grav.30:473-495,1998 | 10.1023/A:1018815027071 | null | gr-qc | null | Yang's pure space equations (C.N. Yang, Phys. Rev. Lett. v.33, p.445 (1974))
generalize Einstein's gravitational equations, while coming from gauge theory.
We study these equations from a number of vantage points: summarizing the work
done previously, comparing them with the Einstein equations and investigating
their... | [
{
"created": "Fri, 9 Jan 1998 12:50:15 GMT",
"version": "v1"
}
] | 2011-04-21 | [
[
"Guilfoyle",
"Brendan S.",
""
],
[
"Nolan",
"Brien C.",
""
]
] | Yang's pure space equations (C.N. Yang, Phys. Rev. Lett. v.33, p.445 (1974)) generalize Einstein's gravitational equations, while coming from gauge theory. We study these equations from a number of vantage points: summarizing the work done previously, comparing them with the Einstein equations and investigating their p... |
gr-qc/0505014 | Tiberiu Harko | K. S. Cheng, T. Harko, X. Y. Wang | Radiation transport equations in non-Riemannian space-times | 12 pages, 3 figures, accepted for publication in PRD | Phys.Rev. D71 (2005) 103001 | 10.1103/PhysRevD.71.103001 | null | gr-qc astro-ph hep-th | null | The transport equations for polarized radiation transfer in non-Riemannian,
Weyl-Cartan type space-times are derived, with the effects of both torsion and
non-metricity included. To obtain the basic propagation equations we use the
tangent bundle approach. The equations describing the time evolution of the
Stokes par... | [
{
"created": "Tue, 3 May 2005 05:56:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cheng",
"K. S.",
""
],
[
"Harko",
"T.",
""
],
[
"Wang",
"X. Y.",
""
]
] | The transport equations for polarized radiation transfer in non-Riemannian, Weyl-Cartan type space-times are derived, with the effects of both torsion and non-metricity included. To obtain the basic propagation equations we use the tangent bundle approach. The equations describing the time evolution of the Stokes param... |
gr-qc/0308014 | Golam Mortuza Hossain | Golam Mortuza Hossain | Hubble operator in isotropic loop quantum cosmology | 20 pages, 3 eps figures, few comments and clarifications added to
match with the published version | Class.Quant.Grav. 21 (2004) 179-196 | 10.1088/0264-9381/21/1/012 | IMSc/2003/06/11 | gr-qc hep-th | null | We present a construction of the Hubble operator for the spatially flat
isotropic loop quantum cosmology. This operator is a Dirac observable on a
subspace of the space of physical solutions. This subspace gets selected
dynamically, requiring that its action be invariant on the physical solution
space. As a simple il... | [
{
"created": "Wed, 6 Aug 2003 13:56:58 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Dec 2003 15:56:08 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Hossain",
"Golam Mortuza",
""
]
] | We present a construction of the Hubble operator for the spatially flat isotropic loop quantum cosmology. This operator is a Dirac observable on a subspace of the space of physical solutions. This subspace gets selected dynamically, requiring that its action be invariant on the physical solution space. As a simple illu... |
gr-qc/0702060 | Muhammad Sharif | M. Sharif | Matter Collineations of Static Spacetimes with Maximal Symmetric
Transverse Spaces | 33 pages, accepted for publication in Acta Physica Polonica B | ActaPhys.Polon.B38:2003-2030,2007 | null | null | gr-qc | null | This paper is devoted to study the symmetries of the energy-momentum tensor
for the static spacetimes with maximal symmetric transverse spaces. We solve
matter collineation equations for the four main cases by taking one, two, three
and four non-zero components of the vector $\xi^a$. For one component non-zero,
we ob... | [
{
"created": "Sat, 10 Feb 2007 04:30:51 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sharif",
"M.",
""
]
] | This paper is devoted to study the symmetries of the energy-momentum tensor for the static spacetimes with maximal symmetric transverse spaces. We solve matter collineation equations for the four main cases by taking one, two, three and four non-zero components of the vector $\xi^a$. For one component non-zero, we obta... |
1905.02275 | Yuri Bonder | Y. Bonder and J. E. Herrera-Flores | Measuring Relativistic Dragging with Quantum Interference | Contribution to the 2019 Gravitation session of the 54th Rencontres
de Moriond, 3 pages | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An experiment to test for relativistic frame dragging effects with quantum
interferometry is proposed. The idea that the classical trajectories of the
interferometer surround a spherical mass source whose angular momentum is
perpendicular to the plane containing these trajectories. A simple analysis
allows one to fin... | [
{
"created": "Mon, 6 May 2019 22:05:05 GMT",
"version": "v1"
}
] | 2019-05-27 | [
[
"Bonder",
"Y.",
""
],
[
"Herrera-Flores",
"J. E.",
""
]
] | An experiment to test for relativistic frame dragging effects with quantum interferometry is proposed. The idea that the classical trajectories of the interferometer surround a spherical mass source whose angular momentum is perpendicular to the plane containing these trajectories. A simple analysis allows one to find ... |
gr-qc/9707036 | Stefan ]minneborg | Stefan Aminneborg (Norra Reals gymnasium, Stockholm), Ingemar
Bengtsson (Fysikum, Stockholm University), Dieter Brill (Department of
Physics, University of Maryland), Soren Holst and Peter Peldan (Fysikum,
Stockholm University) | Black Holes and Wormholes in 2+1 Dimensions | 23 pages, LaTeX, 11 figures | Class.Quant.Grav. 15 (1998) 627-644 | 10.1088/0264-9381/15/3/013 | USITP 97-13 | gr-qc | null | A large variety of spacetimes---including the BTZ black holes---can be
obtained by identifying points in 2+1 dimensional anti-de Sitter space by means
of a discrete group of isometries. We consider all such spacetimes that can be
obtained under a restriction to time symmetric initial data and one asymptotic
region on... | [
{
"created": "Tue, 15 Jul 1997 18:11:05 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Aminneborg",
"Stefan",
"",
"Norra Reals gymnasium, Stockholm"
],
[
"Bengtsson",
"Ingemar",
"",
"Fysikum, Stockholm University"
],
[
"Brill",
"Dieter",
"",
"Department of\n Physics, University of Maryland"
],
[
"Holst",
"Soren",
"",
"Fys... | A large variety of spacetimes---including the BTZ black holes---can be obtained by identifying points in 2+1 dimensional anti-de Sitter space by means of a discrete group of isometries. We consider all such spacetimes that can be obtained under a restriction to time symmetric initial data and one asymptotic region only... |
gr-qc/0011066 | Irina Radinschi | Irina Radinschi | Energy Distribution of a Charged Regular Black Hole | 6 pages, no figures | Mod.Phys.Lett. A16 (2001) 673 | 10.1142/S0217732301003711 | null | gr-qc | null | We calculate the energy distribution of a charged regular black hole by using
the energy-momentum complexes of Einstein and M{\o}ller.
| [
{
"created": "Mon, 20 Nov 2000 10:23:05 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Radinschi",
"Irina",
""
]
] | We calculate the energy distribution of a charged regular black hole by using the energy-momentum complexes of Einstein and M{\o}ller. |
1605.03128 | Luis Ak\'e Hau | J. Herrera and L. Ake Hau | Spacetimes Coverings and C-Boundary | Corrections of Cor. 4.11 and Cor. 4.21 (33 pages, 6 figures) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the relation between the c-completion of a Lorentz manifold V and
its quotient M = V/G, where G is an isometry group acting freely and properly
discontinuously. First, we consider the future causal completion case,
characterizing virtually when such a quotient is well behaved with the future
chronological... | [
{
"created": "Tue, 10 May 2016 17:53:43 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jul 2016 10:08:20 GMT",
"version": "v2"
}
] | 2016-07-18 | [
[
"Herrera",
"J.",
""
],
[
"Hau",
"L. Ake",
""
]
] | We consider the relation between the c-completion of a Lorentz manifold V and its quotient M = V/G, where G is an isometry group acting freely and properly discontinuously. First, we consider the future causal completion case, characterizing virtually when such a quotient is well behaved with the future chronological t... |
2008.13384 | Shahar Hod | Shahar Hod | No-go theorem for spatially regular boson stars made of static
nonminimally coupled massive scalar fields | 6 pages | The European Physical Journal C 79, 26 (2019) | 10.1140/epjc/s10052-019-6546-5 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a compact theorem which reveals the fact that static spatially
regular massive scalar fields with nonminimal coupling to gravity cannot form
spherically symmetric asymptotically flat horizonless matter configurations. In
particular, the no-go theorem rules out the existence of boson stars made of
static sc... | [
{
"created": "Mon, 31 Aug 2020 06:30:20 GMT",
"version": "v1"
}
] | 2020-09-09 | [
[
"Hod",
"Shahar",
""
]
] | We present a compact theorem which reveals the fact that static spatially regular massive scalar fields with nonminimal coupling to gravity cannot form spherically symmetric asymptotically flat horizonless matter configurations. In particular, the no-go theorem rules out the existence of boson stars made of static scal... |
1511.04277 | Alessandro D.A.M. Spallicci di Filottrano | P. Ritter, S. Aoudia, A. Spallicci, S. Cordier | Indirect (source-free) integration method. II. Self-force consistent
radial fall | To appear in Int. J. Geom. Meth. Mod. Phys | 2016, Int. J. Geom. Meth. Mod. Phys., 13, 1650019 | 10.1142/S0219887816500195 | null | gr-qc astro-ph.HE math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply our method of indirect integration, described in Part I, at fourth
order, to the radial fall affected by the self-force. The Mode-Sum
regularisation is performed in the Regge-Wheeler gauge using the equivalence
with the harmonic gauge for this orbit. We consider also the motion subjected
to a self-consistent... | [
{
"created": "Fri, 13 Nov 2015 13:38:27 GMT",
"version": "v1"
}
] | 2016-03-22 | [
[
"Ritter",
"P.",
""
],
[
"Aoudia",
"S.",
""
],
[
"Spallicci",
"A.",
""
],
[
"Cordier",
"S.",
""
]
] | We apply our method of indirect integration, described in Part I, at fourth order, to the radial fall affected by the self-force. The Mode-Sum regularisation is performed in the Regge-Wheeler gauge using the equivalence with the harmonic gauge for this orbit. We consider also the motion subjected to a self-consistent a... |
1910.06564 | Banibrata Mukhopadhyay | Surajit Kalita and Banibrata Mukhopadhyay | Asymptotically flat vacuum solution in modified theory of Einstein's
gravity | 8 pages including 5 figures; accepted for publication in European
Physical Journal C | Eur. Phys. J. C (2019) 79: 877 | 10.1140/epjc/s10052-019-7396-x | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A number of recent observations have suggested that the Einstein's theory of
general relativity may not be the ultimate theory of gravity. The f(R) gravity
model with R being the scalar curvature turns out to be one of the best bet to
surpass the general relativity which explains a number of phenomena where
Einstein'... | [
{
"created": "Tue, 15 Oct 2019 07:27:44 GMT",
"version": "v1"
}
] | 2019-11-26 | [
[
"Kalita",
"Surajit",
""
],
[
"Mukhopadhyay",
"Banibrata",
""
]
] | A number of recent observations have suggested that the Einstein's theory of general relativity may not be the ultimate theory of gravity. The f(R) gravity model with R being the scalar curvature turns out to be one of the best bet to surpass the general relativity which explains a number of phenomena where Einstein's ... |
0707.3632 | Paschalis Karageorgis | Paschalis Karageorgis and John G. Stalker | Sharp bounds on 2m/r for static spherical objects | We changed a footnote in which an earlier result of H\aa{}kan
Andr\'{e}asson was not described correctly | Class.Quant.Grav.25:195021,2008 | 10.1088/0264-9381/25/19/195021 | null | gr-qc | null | Sharp bounds are obtained, under a variety of assumptions on the eigenvalues
of the Einstein tensor, for the ratio of the Hawking mass to the areal radius
in static, spherically symmetric space-times.
| [
{
"created": "Tue, 24 Jul 2007 20:48:53 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Oct 2007 17:26:48 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Karageorgis",
"Paschalis",
""
],
[
"Stalker",
"John G.",
""
]
] | Sharp bounds are obtained, under a variety of assumptions on the eigenvalues of the Einstein tensor, for the ratio of the Hawking mass to the areal radius in static, spherically symmetric space-times. |
1708.07527 | Gabriel R. Bengochea | Gabriel R. Bengochea, Gabriel Le\'on | Novel vacuum conditions in inflationary collapse models | 17 pages, 2 figures. Extended and revised version. To appear in
Physics Letters B | Phys. Lett. B 774 (2017) 338 | 10.1016/j.physletb.2017.09.085 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of inflationary models that incorporate a spontaneous
reduction of the wave function for the emergence of the seeds of cosmic
structure, we study the effects on the primordial scalar power spectrum by
choosing a novel initial quantum state that characterizes the perturbations of
the inflaton. Spe... | [
{
"created": "Thu, 24 Aug 2017 19:04:10 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Oct 2017 01:10:39 GMT",
"version": "v2"
}
] | 2017-10-16 | [
[
"Bengochea",
"Gabriel R.",
""
],
[
"León",
"Gabriel",
""
]
] | Within the framework of inflationary models that incorporate a spontaneous reduction of the wave function for the emergence of the seeds of cosmic structure, we study the effects on the primordial scalar power spectrum by choosing a novel initial quantum state that characterizes the perturbations of the inflaton. Speci... |
1306.3137 | Maur\'icio Richartz | Maur\'icio Richartz and Alberto Saa | Superradiance without event horizons in General Relativity | 5 pages; typos corrected; revised assumptions and revised argument in
section II, results unchanged | Phys. Rev. D 88, 044008 (2013) | 10.1103/PhysRevD.88.044008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Superradiant scattering processes are studied in general relativistic systems
which, unlike rotating and/or charged black holes, do not exhibit an event
horizon. Inspired by Zel'dovich's seminal works on the amplification of waves
by a rotating cylinder, we analyse, in the context of General Relativity, the
possibili... | [
{
"created": "Thu, 13 Jun 2013 15:28:01 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2013 06:02:29 GMT",
"version": "v2"
}
] | 2013-08-07 | [
[
"Richartz",
"Maurício",
""
],
[
"Saa",
"Alberto",
""
]
] | Superradiant scattering processes are studied in general relativistic systems which, unlike rotating and/or charged black holes, do not exhibit an event horizon. Inspired by Zel'dovich's seminal works on the amplification of waves by a rotating cylinder, we analyse, in the context of General Relativity, the possibility... |
gr-qc/0511138 | Lorenzo Iorio | Lorenzo Iorio | Orbital effects of Sun's mass loss and the Earth's fate | Latex2e, 21 pages, 2 tables, 3 figures, 29 references. To appear in
Natural Science (NS) | Natural Science 2: 329-337, 2010 | 10.4236/ns.2010.24041 | null | gr-qc astro-ph hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I calculate the classical effects induced by an isotropic mass loss of a body
on the orbital motion of a test particle around it. By applying my results to
the phase in which the radius of the Sun, already moved to the Red Giant Branch
of the Hertzsprung-Russell Diagram, will become as large as 1.20 AU in about 1
Myr... | [
{
"created": "Fri, 25 Nov 2005 13:50:40 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2010 13:23:24 GMT",
"version": "v2"
}
] | 2010-04-30 | [
[
"Iorio",
"Lorenzo",
""
]
] | I calculate the classical effects induced by an isotropic mass loss of a body on the orbital motion of a test particle around it. By applying my results to the phase in which the radius of the Sun, already moved to the Red Giant Branch of the Hertzsprung-Russell Diagram, will become as large as 1.20 AU in about 1 Myr, ... |
gr-qc/9602046 | Abhay Ashtekar | Abhay Ashtekar, Jerzy Lewandowski | Quantum Theory of Gravity I: Area Operators | 33 pages, ReVTeX, Section 4 Revised: New results on the effect of
topology of a surface on the eigenvalues and eigenfunctions of its area
operator included. The proof of the bound on the level spacing of eigenvalues
(for large areas) simplified and its ramification to the Bekenstein-Mukhanov
analysis of black-h... | Class.Quant.Grav.14:A55-A82,1997 | 10.1088/0264-9381/14/1A/006 | CGPG-96/2-4 | gr-qc | null | A new functional calculus, developed recently for a fully non-perturbative
treatment of quantum gravity, is used to begin a systematic construction of a
quantum theory of geometry. Regulated operators corresponding to areas of
2-surfaces are introduced and shown to be self-adjoint on the underlying
(kinematical) Hilb... | [
{
"created": "Fri, 23 Feb 1996 20:29:06 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 1996 23:20:53 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | A new functional calculus, developed recently for a fully non-perturbative treatment of quantum gravity, is used to begin a systematic construction of a quantum theory of geometry. Regulated operators corresponding to areas of 2-surfaces are introduced and shown to be self-adjoint on the underlying (kinematical) Hilber... |
1105.4579 | \"Ozcan Sert | Tekin Dereli and \"Ozcan Sert | Non-minimal $R^\beta F^2$-Coupled Electromagnetic Fields to Gravity and
Static, Spherically Symmetric Solutions | 9 pages | Modern Physics Letters A, Volume 26, Issue 20, pp. 1487-1494
(2011) | 10.1142/S0217732311036085 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate non-minimal $R^\beta F^2$-type couplings of electromagnetic
fields to gravity. We derive the field equations by a first order variational
principle using the method of Lagrange multipliers. Then we present various
static, spherically symmetric solutions describing the exterior fields in the
vicinity of... | [
{
"created": "Mon, 23 May 2011 18:18:02 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jun 2011 09:59:21 GMT",
"version": "v2"
}
] | 2011-09-20 | [
[
"Dereli",
"Tekin",
""
],
[
"Sert",
"Özcan",
""
]
] | We investigate non-minimal $R^\beta F^2$-type couplings of electromagnetic fields to gravity. We derive the field equations by a first order variational principle using the method of Lagrange multipliers. Then we present various static, spherically symmetric solutions describing the exterior fields in the vicinity of e... |
1509.01671 | James Quach Dr | James Q. Quach | Foldy-Wouthuysen transformation of the generalised Dirac Hamiltonian in
a gravitational-wave background | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Goncalves et al. derived a non-relativistic limit of the generalised Dirac
Hamiltonian in the presence of a gravitational wave, using the exact
Foldy-Wouthuysen transformation. This gave rise to the intriguing notion that
spin-precession may occur even in the absence of a magnetic field. We argue
that this effect is ... | [
{
"created": "Sat, 5 Sep 2015 07:57:36 GMT",
"version": "v1"
}
] | 2015-09-08 | [
[
"Quach",
"James Q.",
""
]
] | Goncalves et al. derived a non-relativistic limit of the generalised Dirac Hamiltonian in the presence of a gravitational wave, using the exact Foldy-Wouthuysen transformation. This gave rise to the intriguing notion that spin-precession may occur even in the absence of a magnetic field. We argue that this effect is no... |
gr-qc/0005058 | Alicia M. Sintes | A.M. Sintes, A. Vecchio | Detection of gravitational waves from inspiraling compact binaries using
non-restricted post-Newtonian approximations | Latex, 6 pages. To appear in: "Rencontres de Moriond: Gravitational
waves and experimetal gravity". Edt. J. Dumarchez; Editions Frontieres,
France | null | null | null | gr-qc | null | The set up of matched filters for the detection of gravitational waves from
in-spiraling compact binaries is usually carried out using the restricted
post-Newtonian approximation: the filter phase is modelled including
post-Newtonian corrections, whereas the amplitude is retained at the Newtonian
order. Here we inves... | [
{
"created": "Tue, 16 May 2000 16:07:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sintes",
"A. M.",
""
],
[
"Vecchio",
"A.",
""
]
] | The set up of matched filters for the detection of gravitational waves from in-spiraling compact binaries is usually carried out using the restricted post-Newtonian approximation: the filter phase is modelled including post-Newtonian corrections, whereas the amplitude is retained at the Newtonian order. Here we investi... |
1305.1702 | Nilanjana Mahata | Nilanjana Mahata, Subenoy Chakraborty | Dilatonic Scalar Field: A Dynamical System Analysis | 8 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The work deals with homogeneous and isotropic, flat FRW model of the universe
which is filled up with non-interacting dark matter and dark energy to
compatible with recent observational evidences. By choosing the dark energy in
the form of a dilatonic scalar field, the evolution equations are reduced to an
autonomous... | [
{
"created": "Wed, 8 May 2013 03:05:32 GMT",
"version": "v1"
}
] | 2013-05-09 | [
[
"Mahata",
"Nilanjana",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The work deals with homogeneous and isotropic, flat FRW model of the universe which is filled up with non-interacting dark matter and dark energy to compatible with recent observational evidences. By choosing the dark energy in the form of a dilatonic scalar field, the evolution equations are reduced to an autonomous s... |
1506.08410 | Guoping Li | GuoPing Li, Biao Cao, Zhongwen Feng, Xiaotao Zu | Strong Gravitational Lensing in a Brane-World Black Hole | 12 pages. Accepted by International Journal of Theoretical Physics | null | 10.1007/s10773-015-2545-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Adopting the strong field limit approach, we investigated the strong
gravitational lensing in a Brane-World black hole, which means that the strong
field limit coefficients and the deflection angle in this gravitational field
are obtained. With this result, it can be said with certainly that the strong
gravitational ... | [
{
"created": "Sun, 28 Jun 2015 14:55:21 GMT",
"version": "v1"
}
] | 2015-06-30 | [
[
"Li",
"GuoPing",
""
],
[
"Cao",
"Biao",
""
],
[
"Feng",
"Zhongwen",
""
],
[
"Zu",
"Xiaotao",
""
]
] | Adopting the strong field limit approach, we investigated the strong gravitational lensing in a Brane-World black hole, which means that the strong field limit coefficients and the deflection angle in this gravitational field are obtained. With this result, it can be said with certainly that the strong gravitational le... |
2402.04577 | Xiao Zhang | Jialue Li, Xiao Zhang | The Bondi-Sachs formalism for the Einstein scalar field equations with
the zero cosmological constant | 29 pages | null | null | null | gr-qc math.DG | http://creativecommons.org/publicdomain/zero/1.0/ | Inspired by interaction of gravitational waves and dark matters, we study the
Bondi-Sachs formalism for Einstein massless scalar field with zero cosmological
constant. We provide asymptotic expansions for the Bondi-Sachs metrics as well
as the scalar fields and prove the peeling property. We also prove the
positivity... | [
{
"created": "Wed, 7 Feb 2024 04:33:52 GMT",
"version": "v1"
}
] | 2024-02-08 | [
[
"Li",
"Jialue",
""
],
[
"Zhang",
"Xiao",
""
]
] | Inspired by interaction of gravitational waves and dark matters, we study the Bondi-Sachs formalism for Einstein massless scalar field with zero cosmological constant. We provide asymptotic expansions for the Bondi-Sachs metrics as well as the scalar fields and prove the peeling property. We also prove the positivity o... |
gr-qc/9211002 | Jonathan Z. Simon | Leonard Parker and Jonathan Z. Simon | Einstein Equation with Quantum Corrections Reduced to Second Order | 47 pages plus 4 figure pages | Phys.Rev.D47:1339-1355,1993 | 10.1103/PhysRevD.47.1339 | WISC-MILW-92-TH-14 | gr-qc | null | We consider the Einstein equation with first order (semiclassical) quantum
corrections. Although the quantum corrections contain up to fourth order
derivatives of the metric, the solutions which are physically relevant satisfy
a reduced equations which contain derivatives no higher than second order. We
obtain the re... | [
{
"created": "Tue, 3 Nov 1992 16:14:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Parker",
"Leonard",
""
],
[
"Simon",
"Jonathan Z.",
""
]
] | We consider the Einstein equation with first order (semiclassical) quantum corrections. Although the quantum corrections contain up to fourth order derivatives of the metric, the solutions which are physically relevant satisfy a reduced equations which contain derivatives no higher than second order. We obtain the redu... |
gr-qc/9801035 | Yousuke Itoh | Y. Itoh, M. Hotta, M. Morikawa and T. Futamase | Dynamical Instability of a two-dimensional Quantum Black Hole | 7 pages, 2 figures, LaTeX, Phys. Rev. D (submitted) | Phys.Rev.D57:4516-4520,1998 | 10.1103/PhysRevD.57.4516 | TU-530 | gr-qc | null | We investigate dynamical instability of a two-dimensional quantum black hole
model considered by Lowe in his study of Hawking evaporation. The model is
supposed to express a black hole in equilibrium with a bath of Hawking
radiation. It turns out that the model has at least one instability modes for a
wide range of p... | [
{
"created": "Mon, 12 Jan 1998 05:51:19 GMT",
"version": "v1"
}
] | 2010-10-12 | [
[
"Itoh",
"Y.",
""
],
[
"Hotta",
"M.",
""
],
[
"Morikawa",
"M.",
""
],
[
"Futamase",
"T.",
""
]
] | We investigate dynamical instability of a two-dimensional quantum black hole model considered by Lowe in his study of Hawking evaporation. The model is supposed to express a black hole in equilibrium with a bath of Hawking radiation. It turns out that the model has at least one instability modes for a wide range of par... |
gr-qc/0201057 | Spiros Cotsakis | Yvonne Choquet-Bruhat and Spiros Cotsakis | Global Hyperbolicity and Completeness | 7 pages. Accepted for publication in the Journal of Geometry and
Physics. v2: Minor typos corrected | J.Geom.Phys. 43 (2002) 345-350 | 10.1016/S0393-0440(02)00028-1 | null | gr-qc | null | We prove global hyperbolicity of spacetimes under generic regularity
conditions on the metric. We then show that these spacetimes are timelike and
null geodesically complete if the gradient of the lapse and the extrinsic
curvature $K$ are integrable. This last condition is required only for the
tracefree part of $K$ ... | [
{
"created": "Thu, 17 Jan 2002 12:23:23 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jan 2002 16:33:10 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"Cotsakis",
"Spiros",
""
]
] | We prove global hyperbolicity of spacetimes under generic regularity conditions on the metric. We then show that these spacetimes are timelike and null geodesically complete if the gradient of the lapse and the extrinsic curvature $K$ are integrable. This last condition is required only for the tracefree part of $K$ if... |
2102.00830 | Kouji Nakamura | Kouji Nakamura | Proposal of a gauge-invariant treatment of l=0,1-mode perturbations on
Schwarzschild Background Spacetime | (v1) 10 pages, no figure; (v2) 16 pages, Section 2 is added for the
explanation of our previous works, Additional explanations are added,
references are added and re-organized; (v3) Some explanations are added,
Typos are corrected | null | 10.1088/1361-6382/ac03f9 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gauge-invariant treatment of the monopole- ($l=0$) and dipole ($l=1$) modes
in linear perturbations of the Schwarzschild background spacetime is proposed.
Through this gauge-invariant treatment, we derived the solutions to the
linearized Einstein equation for these modes with a generic matter field. In
the vacuum c... | [
{
"created": "Mon, 1 Feb 2021 13:36:00 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Apr 2021 09:44:44 GMT",
"version": "v2"
},
{
"created": "Fri, 14 May 2021 11:20:32 GMT",
"version": "v3"
}
] | 2021-08-11 | [
[
"Nakamura",
"Kouji",
""
]
] | A gauge-invariant treatment of the monopole- ($l=0$) and dipole ($l=1$) modes in linear perturbations of the Schwarzschild background spacetime is proposed. Through this gauge-invariant treatment, we derived the solutions to the linearized Einstein equation for these modes with a generic matter field. In the vacuum cas... |
gr-qc/0612036 | Mayeul Arminjon | Mayeul Arminjon | A theory of gravity as a pressure force. II. Lorentz contraction and
"relativistic" effects | 21 pages | Rev.Roum.Sci.Tech.Ser.Mec.Appl. 38 (1993) 107-128 | null | null | gr-qc | null | In a foregoing paper, gravity has been interpreted as the pressure force
exerted on matter at the scale of elementary particles by a perfect fluid.
Under the condition that Newtonian gravity must be recovered in the
incompressible case, a scalar field equation has thus been proposed for
gravity, giving a new theory i... | [
{
"created": "Wed, 6 Dec 2006 09:57:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arminjon",
"Mayeul",
""
]
] | In a foregoing paper, gravity has been interpreted as the pressure force exerted on matter at the scale of elementary particles by a perfect fluid. Under the condition that Newtonian gravity must be recovered in the incompressible case, a scalar field equation has thus been proposed for gravity, giving a new theory in ... |
1612.06207 | Sante Carloni Dr | Sante Carloni | Generalising the coupling between spacetime and matter | 11 pages, no figures, to appear on Physics letters B | null | 10.1016/j.physletb.2016.12.053 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the idea that the coupling between matter and spacetime is more
complex than the one originally envisioned by Einstein. We propose that such
coupling takes the form of a new fundamental tensor in the Einstein field
equations. We then show that the introduction of this tensor can account for
dark phenomenol... | [
{
"created": "Mon, 19 Dec 2016 14:46:57 GMT",
"version": "v1"
}
] | 2017-02-01 | [
[
"Carloni",
"Sante",
""
]
] | We explore the idea that the coupling between matter and spacetime is more complex than the one originally envisioned by Einstein. We propose that such coupling takes the form of a new fundamental tensor in the Einstein field equations. We then show that the introduction of this tensor can account for dark phenomenolog... |
gr-qc/0505015 | Allan Joseph Michael Medved | A.J.M. Medved and Elias C. Vagenas | On Hawking Radiation as Tunneling with Logarithmic Corrections | 6 pages; (v2) references added and various cosmetic (but no physics)
changes | Mod.Phys.Lett. A20 (2005) 1723-1728 | 10.1142/S0217732305018025 | null | gr-qc hep-th | null | There has been recent speculation that the tunneling paradigm for Hawking
radiation could -- after quantum-gravitational effects have suitably been
incorporated -- provide a means for resolving the (black hole) information loss
paradox. A prospective quantum-gravitational effect is the logarithmic-order
correction to... | [
{
"created": "Tue, 3 May 2005 19:29:39 GMT",
"version": "v1"
},
{
"created": "Thu, 12 May 2005 18:00:31 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Medved",
"A. J. M.",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | There has been recent speculation that the tunneling paradigm for Hawking radiation could -- after quantum-gravitational effects have suitably been incorporated -- provide a means for resolving the (black hole) information loss paradox. A prospective quantum-gravitational effect is the logarithmic-order correction to t... |
gr-qc/9401029 | null | R.J. Henderson and S.G. Rajeev | Quantum Gravity on a Circle and the Diffeomorphism Invariance of the
Schrodinger Equation | 35 pages, Tex | Class.Quant.Grav.11:1631-1652,1994 | 10.1088/0264-9381/11/7/006 | University of Rochester Preprint UR1342 | gr-qc hep-th | null | We study a model for quantum gravity on a circle in which the notion of a
classical metric tensor is replaced by a quantum metric with an inhomogeneous
transformation law under diffeomorphisms. This transformation law corresponds
to the co--adjoint action of the Virasoro algebra, and resembles that of the
connection ... | [
{
"created": "Tue, 25 Jan 1994 22:35:50 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Henderson",
"R. J.",
""
],
[
"Rajeev",
"S. G.",
""
]
] | We study a model for quantum gravity on a circle in which the notion of a classical metric tensor is replaced by a quantum metric with an inhomogeneous transformation law under diffeomorphisms. This transformation law corresponds to the co--adjoint action of the Virasoro algebra, and resembles that of the connection in... |
2403.11527 | Jack Hughes | Jack C. M. Hughes, Fedor V. Kusmartsev | Connecting 2-Forms, Conformal Transformations, Curvature Invariants and
Topological Classes in Einstein Spacetimes | 19 pages, submitted to EPJ C | null | null | null | gr-qc hep-ph hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The unique Nature of the Lorentz group in four dimensions is the root cause
of the many remarkable properties of the Einstein spacetimes, in particular
their operational structure on the 2-forms. We show how this operational
structure can be used for two ends. First, it allows for a simple
generalization of the Birkh... | [
{
"created": "Mon, 18 Mar 2024 07:29:28 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Hughes",
"Jack C. M.",
""
],
[
"Kusmartsev",
"Fedor V.",
""
]
] | The unique Nature of the Lorentz group in four dimensions is the root cause of the many remarkable properties of the Einstein spacetimes, in particular their operational structure on the 2-forms. We show how this operational structure can be used for two ends. First, it allows for a simple generalization of the Birkhof... |
gr-qc/9506036 | Patricio Anibal Letelier | Patricio S. Letelier | Spacetime Defects: Torsion Loops | 8 pages, LATEX | Class.Quant.Grav.12:2221-2224,1995 | 10.1088/0264-9381/12/9/009 | null | gr-qc | null | Spacetimes with everywhere vanishing curvature tensor, but with torsion
different from zero only on world sheets that represent closed loops in
ordinary space are presented, also defects along open curves with end points at
infinity are studied. The case of defects along timelike loops is also
considered and the geod... | [
{
"created": "Mon, 19 Jun 1995 18:45:45 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Letelier",
"Patricio S.",
""
]
] | Spacetimes with everywhere vanishing curvature tensor, but with torsion different from zero only on world sheets that represent closed loops in ordinary space are presented, also defects along open curves with end points at infinity are studied. The case of defects along timelike loops is also considered and the geodes... |
gr-qc/9903039 | Israel Quiroz | Israel Quiros (Dpto.Fisica. Universidad Central de Las Villas. Cuba) | The $\omega\to\infty$ limit of Brans-Dicke gravity revisited | 8 pages, LaTeX file, submitted to Phys.Lett.A | null | null | null | gr-qc | null | The $\omega\to\infty$ limit of Brans-Dicke theory is studied with the help of
the conformal transformation approach without resorting, however, to the
conformal invariance property of this formalism, that is shown to be spurious.
| [
{
"created": "Wed, 10 Mar 1999 22:21:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Quiros",
"Israel",
"",
"Dpto.Fisica. Universidad Central de Las Villas. Cuba"
]
] | The $\omega\to\infty$ limit of Brans-Dicke theory is studied with the help of the conformal transformation approach without resorting, however, to the conformal invariance property of this formalism, that is shown to be spurious. |
gr-qc/0005012 | Pinto Innocenzo M. | R.P. Croce, Th. Demma, V. Pierro, I.M. Pinto, F. Postiglione | A Nearly Minimum Redundant Correlator Interpolation Formula for
Gravitational Wave Chirp Detection | 13 pages, 1 table, 16 figures; scheduled for publication on Phys.
Rev. D 62 | Phys.Rev. D62 (2000) 124020 | 10.1103/PhysRevD.62.124020 | null | gr-qc | null | An absolute lower bound on the number of templates needed to keep the fitting
factor above a prescribed minimal value $\Gamma$ in correlator bank detection
of (newtonian) gravitational wave chirps from unknown inspiraling compact
binary sources is derived, resorting to the theory of quasi-bandlimited
functions in the... | [
{
"created": "Wed, 3 May 2000 17:21:34 GMT",
"version": "v1"
},
{
"created": "Thu, 4 May 2000 12:55:37 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Croce",
"R. P.",
""
],
[
"Demma",
"Th.",
""
],
[
"Pierro",
"V.",
""
],
[
"Pinto",
"I. M.",
""
],
[
"Postiglione",
"F.",
""
]
] | An absolute lower bound on the number of templates needed to keep the fitting factor above a prescribed minimal value $\Gamma$ in correlator bank detection of (newtonian) gravitational wave chirps from unknown inspiraling compact binary sources is derived, resorting to the theory of quasi-bandlimited functions in the $... |
0810.4673 | Mohammad Nouri-Zonoz | A. Azadi, D. Momeni and M. Nouri-Zonoz | Cylindrical solutions in metric f(R) gravity | 13 pages, RevTex, Typos corrected and references added | Phys.Lett.B670:210-214,2008 | 10.1016/j.physletb.2008.10.054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static cylindrically symmetric vacuum solutions in Weyl coordinates
in the context of the metric f(R) theories of gravity. The set of the modified
Einstein equations is reduced to a single equation and it is shown how one can
construct exact solutions corresponding to different $f(R)$ models. In
particular t... | [
{
"created": "Sun, 26 Oct 2008 09:33:04 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Dec 2008 07:57:13 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Azadi",
"A.",
""
],
[
"Momeni",
"D.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | We study static cylindrically symmetric vacuum solutions in Weyl coordinates in the context of the metric f(R) theories of gravity. The set of the modified Einstein equations is reduced to a single equation and it is shown how one can construct exact solutions corresponding to different $f(R)$ models. In particular the... |
2201.06511 | Charles J. Horowitz | Tomoyo Namigata, C. J. Horowitz and R. Widmer-Schnidrig | Gravitational search for near Earth black holes or other compact dark
objects | six pages, 6 figures | null | null | null | gr-qc astro-ph.CO astro-ph.EP astro-ph.HE hep-ph nucl-th | http://creativecommons.org/licenses/by-sa/4.0/ | Primordial black holes, with masses comparable to asteroids, are an
attractive possibility for dark matter. In addition, other forms of dark matter
could form compact dark objects (CDO). We search for small tidal accelerations
from low mass black holes or CDOs orbiting near the Earth, and find none. Using
about 10 ye... | [
{
"created": "Mon, 17 Jan 2022 16:40:56 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Namigata",
"Tomoyo",
""
],
[
"Horowitz",
"C. J.",
""
],
[
"Widmer-Schnidrig",
"R.",
""
]
] | Primordial black holes, with masses comparable to asteroids, are an attractive possibility for dark matter. In addition, other forms of dark matter could form compact dark objects (CDO). We search for small tidal accelerations from low mass black holes or CDOs orbiting near the Earth, and find none. Using about 10 year... |
gr-qc/0512117 | Douglas Shaw | Douglas J. Shaw and John D. Barrow | Local Experiments See Cosmologically Varying Constants | 6 pages | Phys.Lett.B639:596-599,2006 | 10.1016/j.physletb.2006.07.016 | null | gr-qc astro-ph hep-th | null | We describe a rigorous construction, using matched asymptotic expansions,
which establishes under very general conditions that local terrestrial and
solar-system experiments will measure the effects of varying `constants' of
Nature occurring on cosmological scales to computable precision. In particular,
`constants' d... | [
{
"created": "Tue, 20 Dec 2005 19:35:48 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Dec 2005 09:50:51 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Shaw",
"Douglas J.",
""
],
[
"Barrow",
"John D.",
""
]
] | We describe a rigorous construction, using matched asymptotic expansions, which establishes under very general conditions that local terrestrial and solar-system experiments will measure the effects of varying `constants' of Nature occurring on cosmological scales to computable precision. In particular, `constants' dri... |
1008.0345 | Quentin G. Bailey | Quentin G. Bailey | Gravity Couplings in the Standard-Model Extension | 5 pages, Presented at the Fifth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, June 28-July 2, 2010 | null | 10.1142/9789814327688_0030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Standard-Model Extension (SME) is an action-based expansion describing
general Lorentz violation for known matter and fields, including gravity. In
this talk, I will discuss the Lorentz-violating gravity couplings in the SME.
Toy models that match the SME expansion, including vector and two-tensor
models, are rev... | [
{
"created": "Mon, 2 Aug 2010 16:49:08 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Bailey",
"Quentin G.",
""
]
] | The Standard-Model Extension (SME) is an action-based expansion describing general Lorentz violation for known matter and fields, including gravity. In this talk, I will discuss the Lorentz-violating gravity couplings in the SME. Toy models that match the SME expansion, including vector and two-tensor models, are revie... |
gr-qc/9602044 | null | Vicen\c{c} Mendez and Josep Triginer | Qualitative Analysis of Causal Cosmological Models | RevTeX file, 23 pages. Accepted for publication in J. Math. Phys | J.Math.Phys.37:2906-2919,1996 | 10.1063/1.531546 | null | gr-qc | null | The Einstein's field equations of Friedmann-Robertson-Walker universes filled
with a dissipative fluid described by both the {\em truncated} and {\em
non-truncated} causal transport equations are analyzed using techniques from
dynamical systems theory. The equations of state, as well as the phase space,
are different... | [
{
"created": "Fri, 23 Feb 1996 14:18:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mendez",
"Vicenç",
""
],
[
"Triginer",
"Josep",
""
]
] | The Einstein's field equations of Friedmann-Robertson-Walker universes filled with a dissipative fluid described by both the {\em truncated} and {\em non-truncated} causal transport equations are analyzed using techniques from dynamical systems theory. The equations of state, as well as the phase space, are different f... |
1212.2588 | Roldao da Rocha | J. M. Hoff da Silva, Roldao da Rocha | Schwarzschild generalized black hole horizon and the embedding space | 7 pages, to appear in European Phys. J. C | Eur. Phys. J. C 72 (2012) 2258 | 10.1140/epjc/s10052-012-2258-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By performing a Taylor expansion along the extra dimension of a metric
describing a black hole on a brane, we explore the influence of the embedding
space on the black hole horizon. In particular, it is shown that the existence
of a Kottler correction of the black hole on the brane, in a viable braneworld
scenario, m... | [
{
"created": "Tue, 11 Dec 2012 19:00:28 GMT",
"version": "v1"
}
] | 2012-12-19 | [
[
"da Silva",
"J. M. Hoff",
""
],
[
"da Rocha",
"Roldao",
""
]
] | By performing a Taylor expansion along the extra dimension of a metric describing a black hole on a brane, we explore the influence of the embedding space on the black hole horizon. In particular, it is shown that the existence of a Kottler correction of the black hole on the brane, in a viable braneworld scenario, mig... |
2004.10031 | Ahmadjon Abdujabbarov | Javlon Rayimbaev, Ahmadjon Abdujabbarov, Bobur Turimov, Farruh
Atamurotov | Magnetized particle motion around 4-D Einstein-Gauss-Bonnet Black Hole | 12 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have investigated the dynamics of magnetized particles
around 4-D Einstein-Gauss-Bonnet black hole immersed in an external
asymptotically uniform magnetic field. We have shown that the magnetic
interaction parameter responsible for circular orbits decreases for negative
values of the Gauss-Bonnet pa... | [
{
"created": "Tue, 21 Apr 2020 14:07:16 GMT",
"version": "v1"
}
] | 2020-04-22 | [
[
"Rayimbaev",
"Javlon",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Turimov",
"Bobur",
""
],
[
"Atamurotov",
"Farruh",
""
]
] | In this paper, we have investigated the dynamics of magnetized particles around 4-D Einstein-Gauss-Bonnet black hole immersed in an external asymptotically uniform magnetic field. We have shown that the magnetic interaction parameter responsible for circular orbits decreases for negative values of the Gauss-Bonnet para... |
1511.08732 | Leandros Perivolaropoulos | A. Lykkas and L. Perivolaropoulos | Scalar-Tensor Quintessence with a linear potential: Avoiding the Big
Crunch cosmic doomsday | 6 pages, 5 figures. Extended version. Accepted in Phys. Rev. D as
regular article (to appear) | Phys. Rev. D 93, 043513 (2016) | 10.1103/PhysRevD.93.043513 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All quintessence potentials that are either monotonic with negative interval
or have a minimum at negative values of the potential, generically predict a
future collapse of the scale factor to a "doomsday" singularity. We show that
this doomsday is generically avoided in models with a proper non-minimal
coupling of t... | [
{
"created": "Mon, 23 Nov 2015 08:30:25 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Jan 2016 13:16:13 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Lykkas",
"A.",
""
],
[
"Perivolaropoulos",
"L.",
""
]
] | All quintessence potentials that are either monotonic with negative interval or have a minimum at negative values of the potential, generically predict a future collapse of the scale factor to a "doomsday" singularity. We show that this doomsday is generically avoided in models with a proper non-minimal coupling of the... |
1910.04528 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | Intriguing microstructures of five-dimensional neutral Gauss-Bonnet AdS
black hole | 12 pages, 5 figures, and 1 table | Phys.Lett. B 803, 135287 (2020) | 10.1016/j.physletb.2020.135287 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analytically study the phase structure and construct the
Ruppeiner geometry in the extended phase space for the five-dimensional neutral
Gauss-Bonnet AdS black hole. Through calculating the scalar curvature of the
Ruppeiner geometry and combining the phase transition, we show that the
attractive int... | [
{
"created": "Thu, 10 Oct 2019 12:56:43 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Mar 2020 09:49:50 GMT",
"version": "v2"
}
] | 2020-03-03 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this paper, we analytically study the phase structure and construct the Ruppeiner geometry in the extended phase space for the five-dimensional neutral Gauss-Bonnet AdS black hole. Through calculating the scalar curvature of the Ruppeiner geometry and combining the phase transition, we show that the attractive inter... |
gr-qc/0311091 | Yuri Obukhov | Yuri N. Obukhov | Two-dimensional metric-affine gravity | Revtex, 15 pages, no figures | Phys.Rev. D69 (2004) 064009 | 10.1103/PhysRevD.69.064009 | ESI-1413 | gr-qc | null | There is a number of completely integrable gravity theories in two
dimensions. We study the metric-affine approach on a 2-dimensional spacetime
and display a new integrable model. Its properties are described and compared
with the known results of Poincare gauge gravity.
| [
{
"created": "Fri, 28 Nov 2003 12:41:43 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Obukhov",
"Yuri N.",
""
]
] | There is a number of completely integrable gravity theories in two dimensions. We study the metric-affine approach on a 2-dimensional spacetime and display a new integrable model. Its properties are described and compared with the known results of Poincare gauge gravity. |
gr-qc/0209066 | Hwei-Jang Yo | Hwei-Jang Yo (University of Illinois), Thomas W. Baumgarte (Bowdoin
College), and Stuart L. Shapiro (University of Illinois) | Improved numerical stability of stationary black hole evolution
calculations | 13 pages, 11 figures, 1 typo in Eq. (20) corrected | Phys.Rev. D66 (2002) 084026 | 10.1103/PhysRevD.66.084026 | null | gr-qc astro-ph | null | We experiment with modifications of the BSSN form of the Einstein field
equations (a reformulation of the ADM equations) and demonstrate how these
modifications affect the stability of numerical black hole evolution
calculations. We use excision to evolve both non-rotating and rotating
Kerr-Schild black holes in octa... | [
{
"created": "Thu, 19 Sep 2002 20:00:08 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Aug 2003 08:12:50 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Yo",
"Hwei-Jang",
"",
"University of Illinois"
],
[
"Baumgarte",
"Thomas W.",
"",
"Bowdoin\n College"
],
[
"Shapiro",
"Stuart L.",
"",
"University of Illinois"
]
] | We experiment with modifications of the BSSN form of the Einstein field equations (a reformulation of the ADM equations) and demonstrate how these modifications affect the stability of numerical black hole evolution calculations. We use excision to evolve both non-rotating and rotating Kerr-Schild black holes in octant... |
2308.10612 | A. C. Khunt | Sagar V. Soni, A. C. Khunt and A. H. Hasmani | A Study of Morris-Thorne Wormhole in Einstein-Cartan Theory | 20 pages, 3 figures, 1 table. Preparing for submission to the
International Journal of Geometric Methods in Modern Physics | null | 10.1142/S0219887824501159 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper focuses on the Einstein-Cartan theory, an extension of general
relativity that incorporates a torsion tensor into spacetime. The differential
form technique is employed to analyze the Einstein-Cartan theory, which
replaces tensors with tetrads. A tetrad formalism, specifically the
Newmann-Penrose-Jogia-Gri... | [
{
"created": "Mon, 21 Aug 2023 10:22:52 GMT",
"version": "v1"
}
] | 2024-02-27 | [
[
"Soni",
"Sagar V.",
""
],
[
"Khunt",
"A. C.",
""
],
[
"Hasmani",
"A. H.",
""
]
] | This paper focuses on the Einstein-Cartan theory, an extension of general relativity that incorporates a torsion tensor into spacetime. The differential form technique is employed to analyze the Einstein-Cartan theory, which replaces tensors with tetrads. A tetrad formalism, specifically the Newmann-Penrose-Jogia-Griff... |
gr-qc/9306032 | Pavol Kolnik | C. Klimcik, P. Kolnik, and A. Pompos | Black Hole with Non-Commutative Hair | 10 pages, LaTeX, PRA-HEP-93/9 | null | null | null | gr-qc hep-th | null | The specific nonlinear vector $\sigma$-model coupled to Einstein gravity is
investigated. The model arises in the studies of the gravitating matter in
non-commutative geometry. The static spherically symmetric spacetimes are
identified by direct solving of the field equations. The asymptotically flat
black hole with ... | [
{
"created": "Fri, 25 Jun 1993 13:30:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Klimcik",
"C.",
""
],
[
"Kolnik",
"P.",
""
],
[
"Pompos",
"A.",
""
]
] | The specific nonlinear vector $\sigma$-model coupled to Einstein gravity is investigated. The model arises in the studies of the gravitating matter in non-commutative geometry. The static spherically symmetric spacetimes are identified by direct solving of the field equations. The asymptotically flat black hole with th... |
0707.0110 | J. Frauendiener | J. Frauendiener and A. Kabobel | The static spherically symmetric body in relativistic elasticity | 19 pages, 8 figures | Class.Quant.Grav.24:4817-4838,2007 | 10.1088/0264-9381/24/18/016 | null | gr-qc | null | In this paper is discussed a class of static spherically symmetric solutions
of the general relativistic elasticity equations. The main point of discussion
is the comparison of two matter models given in terms of their stored energy
functionals, i.e., the rule which gives the amount of energy stored in the
system whe... | [
{
"created": "Sun, 1 Jul 2007 14:43:30 GMT",
"version": "v1"
}
] | 2009-04-16 | [
[
"Frauendiener",
"J.",
""
],
[
"Kabobel",
"A.",
""
]
] | In this paper is discussed a class of static spherically symmetric solutions of the general relativistic elasticity equations. The main point of discussion is the comparison of two matter models given in terms of their stored energy functionals, i.e., the rule which gives the amount of energy stored in the system when ... |
1802.03470 | Vahid Amirkhani | Mohammad A. Ganjali, Vahid Amirkhani, Ahmad ShamlouMehr | Non-Relativistic Fermion-Fermion Scattering in Higher Derivative Gravity | 5 pages with 2 figures | null | 10.1007/s12648-019-01469-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we examine the scattering of two identical fermions in theories
where fermionic fields minimally coupled to higher derivative gravity. In
particular, we consider the extension of general relativity with $R^2$
corrections or non-local terms. We expand the action of fermions around the
flat space backgrou... | [
{
"created": "Fri, 9 Feb 2018 22:23:15 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Ganjali",
"Mohammad A.",
""
],
[
"Amirkhani",
"Vahid",
""
],
[
"ShamlouMehr",
"Ahmad",
""
]
] | In this note, we examine the scattering of two identical fermions in theories where fermionic fields minimally coupled to higher derivative gravity. In particular, we consider the extension of general relativity with $R^2$ corrections or non-local terms. We expand the action of fermions around the flat space background... |
1504.04622 | Peter Taylor | Peter Taylor and \'Eanna \'E. Flanagan | Static Self-Forces in a Five-Dimensional Black Hole Spacetime | Agrees with published version | Phys. Rev. D 92, 084032 (2015) | 10.1103/PhysRevD.92.084032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the electric field and scalar field for a static point charge in
closed form in the 5D Schwarzschild-Tangherlini black hole spacetime. We then
compute the static self-force in each of these cases by assuming that the
appropriate singular field is a 4D Hadamard Green's function on the constant
time Riemannia... | [
{
"created": "Fri, 17 Apr 2015 20:00:34 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 2015 18:25:47 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Nov 2015 20:59:35 GMT",
"version": "v3"
}
] | 2015-11-19 | [
[
"Taylor",
"Peter",
""
],
[
"Flanagan",
"Éanna É.",
""
]
] | We obtain the electric field and scalar field for a static point charge in closed form in the 5D Schwarzschild-Tangherlini black hole spacetime. We then compute the static self-force in each of these cases by assuming that the appropriate singular field is a 4D Hadamard Green's function on the constant time Riemannian ... |
1510.08024 | Otis Chodosh | Otis Chodosh, Yakov Shlapentokh-Rothman | Stationary axisymmetric black holes with matter | null | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a geometric framework for the construction of non-vacuum black
holes whose metrics are stationary and axisymmetric. Under suitable assumptions
we show that the Einstein equations reduce to an Einstein-harmonic map type
system and analyze the compatibility of the resulting equations.
This framework will b... | [
{
"created": "Tue, 27 Oct 2015 18:39:53 GMT",
"version": "v1"
}
] | 2015-10-28 | [
[
"Chodosh",
"Otis",
""
],
[
"Shlapentokh-Rothman",
"Yakov",
""
]
] | We provide a geometric framework for the construction of non-vacuum black holes whose metrics are stationary and axisymmetric. Under suitable assumptions we show that the Einstein equations reduce to an Einstein-harmonic map type system and analyze the compatibility of the resulting equations. This framework will be fu... |
gr-qc/0601004 | Romesh K. Kaul | Romesh K. Kaul | Gauge Theory of Gravity and Supergravity | 27 pages | Phys.Rev.D73:065027,2006 | 10.1103/PhysRevD.73.065027 | null | gr-qc hep-th | null | We present a formulation of gravity in terms of a theory based on complex
SU(2) gauge fields with a general coordinate invariant action functional
quadratic in the field strength. Self-duality or anti-self-duality of the field
strength emerges as a constraint from the equations of motion of this theory.
This in turn ... | [
{
"created": "Mon, 2 Jan 2006 08:25:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kaul",
"Romesh K.",
""
]
] | We present a formulation of gravity in terms of a theory based on complex SU(2) gauge fields with a general coordinate invariant action functional quadratic in the field strength. Self-duality or anti-self-duality of the field strength emerges as a constraint from the equations of motion of this theory. This in turn le... |
2010.03462 | Emmanuel Frion | Emmanuel Frion | Quantum Effects in Cosmology | PhD Thesis, 163 pages, 30 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum effects play an essential role in modern cosmology. Perhaps the most
striking example comes from large-scale structures, generally assumed to
originate from vacuum quantum fluctuations and stretched by an expansion phase.
Inflation is the leading paradigm in explaining this process. The various
observational ... | [
{
"created": "Wed, 7 Oct 2020 14:56:19 GMT",
"version": "v1"
}
] | 2020-10-08 | [
[
"Frion",
"Emmanuel",
""
]
] | Quantum effects play an essential role in modern cosmology. Perhaps the most striking example comes from large-scale structures, generally assumed to originate from vacuum quantum fluctuations and stretched by an expansion phase. Inflation is the leading paradigm in explaining this process. The various observational su... |
0907.0414 | Robert M. Wald | Samuel E. Gralla and Robert M. Wald | Derivation of Gravitational Self-Force | 9 pages, no figures; to appear in proceedings of CNRS School on Mass | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the issue of ``particle motion'' in general relativity in a
systematic and rigorous way by considering a one-parameter family of metrics
corresponding to having a body (or black hole) that is ``scaled down'' to zero
size and mass in an appropriate manner. We prove that the limiting worldline of
such a one-... | [
{
"created": "Thu, 2 Jul 2009 15:51:45 GMT",
"version": "v1"
}
] | 2009-07-03 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Wald",
"Robert M.",
""
]
] | We analyze the issue of ``particle motion'' in general relativity in a systematic and rigorous way by considering a one-parameter family of metrics corresponding to having a body (or black hole) that is ``scaled down'' to zero size and mass in an appropriate manner. We prove that the limiting worldline of such a one-pa... |
1202.4951 | Alexis Larranaga PhD | Alexis Larranaga, Luis Cabarique | Advance of Planetary Perihelion in Post-Newtonian Gravity | 7 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an elementary derivation of the planetary advance of the
perihelion for a general spherically symmetric line element in the post-
newtonian approximation.
| [
{
"created": "Wed, 22 Feb 2012 16:16:57 GMT",
"version": "v1"
}
] | 2012-02-23 | [
[
"Larranaga",
"Alexis",
""
],
[
"Cabarique",
"Luis",
""
]
] | We present an elementary derivation of the planetary advance of the perihelion for a general spherically symmetric line element in the post- newtonian approximation. |
2105.00540 | Carlo Rovelli | Carlo Rovelli | The layers that build up the notion of time | 7 pages, Contribution to the volume 'Time and Science', R. Lestienne
and P. Harris eds., World Scientific | null | null | null | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | Confusion and disagreement around the notion of time is due to the fact that
we often fail to recognize that we call 'time' a variety of distinct notions,
only partially related to one another. Many apparently obvious properties of
time are results of different kinds of approximations, idealizations, or
special conte... | [
{
"created": "Sun, 2 May 2021 19:49:42 GMT",
"version": "v1"
},
{
"created": "Fri, 14 May 2021 22:59:48 GMT",
"version": "v2"
}
] | 2021-05-18 | [
[
"Rovelli",
"Carlo",
""
]
] | Confusion and disagreement around the notion of time is due to the fact that we often fail to recognize that we call 'time' a variety of distinct notions, only partially related to one another. Many apparently obvious properties of time are results of different kinds of approximations, idealizations, or special context... |
gr-qc/0010111 | Sanjay Jhingan | S. Jhingan, N. Dadhich and P. S. Joshi | Gravitational Collapse in Constant Potential Bath | LaTex 12 Pages, 2 figures. To appear in Physical Review D | Phys.Rev. D63 (2001) 044010 | 10.1103/PhysRevD.63.044010 | null | gr-qc | null | We analyse here the gravitational collapse of directed null radiation in a
background with a constant potential such as one produced by a star system like
galaxy in which the collapsing object is immersed. Both naked singularities and
black holes are shown to be developing as the final outcome of the collapse. An
int... | [
{
"created": "Tue, 31 Oct 2000 08:40:54 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Jhingan",
"S.",
""
],
[
"Dadhich",
"N.",
""
],
[
"Joshi",
"P. S.",
""
]
] | We analyse here the gravitational collapse of directed null radiation in a background with a constant potential such as one produced by a star system like galaxy in which the collapsing object is immersed. Both naked singularities and black holes are shown to be developing as the final outcome of the collapse. An inter... |
gr-qc/0307049 | Petr Slan\'y | Z. Stuchlik, P. Slany | Equatorial circular orbits in the Kerr-de Sitter spacetimes | 24 pages, 19 figures, REVTeX 4 | Phys.Rev. D69 (2004) 064001 | 10.1103/PhysRevD.69.064001 | null | gr-qc | null | Equatorial motion of test particles in the Kerr-de Sitter spacetimes is
considered. Circular orbits are determined, their properties are discussed for
both the black-hole and naked-singularity spacetimes, and their relevance for
thin accretion discs is established.
| [
{
"created": "Thu, 10 Jul 2003 12:47:02 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2004 07:05:09 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Stuchlik",
"Z.",
""
],
[
"Slany",
"P.",
""
]
] | Equatorial motion of test particles in the Kerr-de Sitter spacetimes is considered. Circular orbits are determined, their properties are discussed for both the black-hole and naked-singularity spacetimes, and their relevance for thin accretion discs is established. |
1412.7567 | Hemza Azri | Hemza Azri and A. Bounames | Cosmological Consequences of a Variable Cosmological Constant Model | Accepted in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D 26, 1750060 (2017) | 10.1142/S0218271817500602 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a model of dark energy which evolves with time via the scale
factor. The equation of state $\omega=(1-2\alpha)/(1+2\alpha)$ is studied as a
function of a parameter $\alpha$ introduced in this model. In addition to the
recent accelerated expansion, the model predicts another decelerated phase. The
age of the... | [
{
"created": "Tue, 23 Dec 2014 22:25:30 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Sep 2016 11:40:52 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Dec 2016 13:19:12 GMT",
"version": "v3"
}
] | 2017-06-20 | [
[
"Azri",
"Hemza",
""
],
[
"Bounames",
"A.",
""
]
] | We derive a model of dark energy which evolves with time via the scale factor. The equation of state $\omega=(1-2\alpha)/(1+2\alpha)$ is studied as a function of a parameter $\alpha$ introduced in this model. In addition to the recent accelerated expansion, the model predicts another decelerated phase. The age of the u... |
1609.05901 | Tristan Smith | Tristan L. Smith (Swarthmore College) and Robert Caldwell (Dartmouth
College) | Sensitivity to a Frequency-Dependent Circular Polarization in an
Isotropic Stochastic Gravitational Wave Background | 18 pages, 8 figures, comments welcome | Phys. Rev. D 95, 044036 (2017) | 10.1103/PhysRevD.95.044036 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the sensitivity to a circular polarization of an isotropic
stochastic gravitational wave background (ISGWB) as a function of frequency for
ground- and space-based interferometers and observations of the cosmic
microwave background. The origin of a circularly polarized ISGWB may be due to
exotic primordia... | [
{
"created": "Mon, 19 Sep 2016 20:00:01 GMT",
"version": "v1"
}
] | 2017-03-01 | [
[
"Smith",
"Tristan L.",
"",
"Swarthmore College"
],
[
"Caldwell",
"Robert",
"",
"Dartmouth\n College"
]
] | We calculate the sensitivity to a circular polarization of an isotropic stochastic gravitational wave background (ISGWB) as a function of frequency for ground- and space-based interferometers and observations of the cosmic microwave background. The origin of a circularly polarized ISGWB may be due to exotic primordial ... |
2209.10976 | Vitalii Vertogradov | Vitalii Vertogradov | The Negative Energy in Generalized Vaidya Spacetime | 18 pages | Universe 2020, 6(9), 155 | 10.3390/universe6090155 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we consider the negative energy problem in generalized Vaidya
spacetime. We consider several models when we have the naked singularity as a
result of the gravitational collapse. In these models we investigate the
geodesics for particles with negative energy when the II type of the matter
field satisfies... | [
{
"created": "Thu, 22 Sep 2022 13:03:05 GMT",
"version": "v1"
}
] | 2022-09-23 | [
[
"Vertogradov",
"Vitalii",
""
]
] | In this paper we consider the negative energy problem in generalized Vaidya spacetime. We consider several models when we have the naked singularity as a result of the gravitational collapse. In these models we investigate the geodesics for particles with negative energy when the II type of the matter field satisfies t... |
2110.02448 | Barak Shoshany | Barak Shoshany and Jared Wogan | Wormhole Time Machines and Multiple Histories | 28 pages, 5 figures, source code available at
https://github.com/bshoshany/WormholeParadoxSimulation | Gen. Relativ. Gravit. 55, 44 (2023) | 10.1007/s10714-023-03094-8 | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper, we showed that a class of time travel paradoxes which
cannot be resolved using Novikov's self-consistency conjecture can be resolved
by assuming the existence of multiple histories or parallel timelines. However,
our proof was obtained using a simplistic toy model, which was formulated using
cont... | [
{
"created": "Wed, 6 Oct 2021 01:36:08 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Aug 2022 21:44:30 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Mar 2023 15:42:05 GMT",
"version": "v3"
}
] | 2023-03-16 | [
[
"Shoshany",
"Barak",
""
],
[
"Wogan",
"Jared",
""
]
] | In a previous paper, we showed that a class of time travel paradoxes which cannot be resolved using Novikov's self-consistency conjecture can be resolved by assuming the existence of multiple histories or parallel timelines. However, our proof was obtained using a simplistic toy model, which was formulated using contri... |
2212.00804 | Ali \"Ovg\"un Dr. | Wajiha Javed, Sibgha Riaz, Reggie C. Pantig and Ali \"Ovg\"un | Weak Gravitational Lensing in Dark Matter and Plasma Mediums for
Wormhole-like Static Aether Solution | 12 pages. Accepted for publication in the European Physical Journal C
(https://link.springer.com/article/10.1140/epjc/s10052-022-11030-4) | Eur. Phys. J. C 82, 1057 (2022) | 10.1140/epjc/s10052-022-11030-4 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study the deflection angle for wormhole-like static aether
solution by using Gibbons and Werner technique in non-plasma, plasma, and dark
matter mediums. For this purpose, we use optical spacetime geometry to
calculate the Gaussian optical curvature, then implement the Gauss-Bonnet
theorem in weak f... | [
{
"created": "Thu, 1 Dec 2022 16:54:43 GMT",
"version": "v1"
}
] | 2022-12-05 | [
[
"Javed",
"Wajiha",
""
],
[
"Riaz",
"Sibgha",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Övgün",
"Ali",
""
]
] | In this paper, we study the deflection angle for wormhole-like static aether solution by using Gibbons and Werner technique in non-plasma, plasma, and dark matter mediums. For this purpose, we use optical spacetime geometry to calculate the Gaussian optical curvature, then implement the Gauss-Bonnet theorem in weak fie... |
gr-qc/0505026 | Vojt\v{e}ch Pravda | A. Pravdova, V. Pravda, A. Coley | A note on the peeling theorem in higher dimensions | 5 pages, to appear in Class. Quantum Grav | Class.Quant.Grav.22:2535-2538,2005 | 10.1088/0264-9381/22/13/001 | null | gr-qc | null | We demonstrate the ``peeling property'' of the Weyl tensor in higher
dimensions in the case of even dimensions (and with some additional
assumptions), thereby providing a first step towards understanding of the
general peeling behaviour of the Weyl tensor, and the asymptotic structure at
null infinity, in higher dime... | [
{
"created": "Thu, 5 May 2005 20:24:29 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pravdova",
"A.",
""
],
[
"Pravda",
"V.",
""
],
[
"Coley",
"A.",
""
]
] | We demonstrate the ``peeling property'' of the Weyl tensor in higher dimensions in the case of even dimensions (and with some additional assumptions), thereby providing a first step towards understanding of the general peeling behaviour of the Weyl tensor, and the asymptotic structure at null infinity, in higher dimens... |
gr-qc/0308015 | I. P. Costa E. Silva | J. Castineiras, I.P. Costa e Silva and G.E.A. Matsas | Interaction of Hawking radiation with static sources in deSitter and
Schwarzschild-deSitter spacetimes | ReVTeX4 file, 9 pages, 5 figures | Phys.Rev. D68 (2003) 084022 | 10.1103/PhysRevD.68.084022 | null | gr-qc | null | We study and look for similarities between the response rates $R^{\rm
dS}(a_0, \Lambda)$ and $R^{\rm SdS}(a_0, \Lambda, M)$ of a static scalar source
with constant proper acceleration $a_0$ interacting with a massless,
conformally coupled Klein-Gordon field in (i) deSitter spacetime, in the
Euclidean vacuum, which de... | [
{
"created": "Wed, 6 Aug 2003 17:48:24 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Castineiras",
"J.",
""
],
[
"Silva",
"I. P. Costa e",
""
],
[
"Matsas",
"G. E. A.",
""
]
] | We study and look for similarities between the response rates $R^{\rm dS}(a_0, \Lambda)$ and $R^{\rm SdS}(a_0, \Lambda, M)$ of a static scalar source with constant proper acceleration $a_0$ interacting with a massless, conformally coupled Klein-Gordon field in (i) deSitter spacetime, in the Euclidean vacuum, which desc... |
1402.2592 | Behnam Pourhassan | E.O. Kahya, M. Khurshudyan, B. Pourhassan, R. Myrzakulov, A. Pasqua | Higher order corrections of the extended Chaplygin gas cosmology with
varying $G$ and $\Lambda$ | Perturbation analysis added, typos corrected, references added | The European Physical Journal C 75 (2015) 43 | 10.1140/epjc/s10052-015-3263-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study two different models of dark energy based on
Chaplygin gas equation of state. The first model is the variable modified
Chaplygin gas while the second one is the extended Chaplygin gas. Both models
are considered in the framework of higher order $f(R)$ modified gravity. We
also consider the cas... | [
{
"created": "Tue, 11 Feb 2014 18:23:36 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Aug 2014 20:31:32 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Oct 2014 08:46:08 GMT",
"version": "v3"
},
{
"created": "Thu, 11 Dec 2014 19:17:56 GMT",
"version": "v4"
}
] | 2015-02-10 | [
[
"Kahya",
"E. O.",
""
],
[
"Khurshudyan",
"M.",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Pasqua",
"A.",
""
]
] | In this paper, we study two different models of dark energy based on Chaplygin gas equation of state. The first model is the variable modified Chaplygin gas while the second one is the extended Chaplygin gas. Both models are considered in the framework of higher order $f(R)$ modified gravity. We also consider the case ... |
1402.6491 | Anuj Kumar Dubey Mr. | Anuj Kumar Dubey and A K Sen | An analysis of gravitational redshift from rotating body | arXiv admin note: substantial text overlap with arXiv:1310.0987 | International Journal of Theoretical Physics 54(7), 2398 (2014) | 10.1007/s10773-014-2464-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational redshift is generally calculated without considering the
rotation of a body. Neglecting the rotation, the geometry of space time can be
described by using the spherically symmetric Schwarzschild geometry. Rotation
has great effect on general relativity, which gives new challenges on
gravitational redshi... | [
{
"created": "Wed, 26 Feb 2014 11:13:49 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 2014 12:32:25 GMT",
"version": "v2"
}
] | 2015-10-19 | [
[
"Dubey",
"Anuj Kumar",
""
],
[
"Sen",
"A K",
""
]
] | Gravitational redshift is generally calculated without considering the rotation of a body. Neglecting the rotation, the geometry of space time can be described by using the spherically symmetric Schwarzschild geometry. Rotation has great effect on general relativity, which gives new challenges on gravitational redshift... |
gr-qc/0301047 | Aleksandar Mikovic | A. Mikovic | Quantum Gravity Vacuum and Invariants of Embedded Spin Networks | 15 pages, revised version to appear in Class. Quant. Grav | Class.Quant.Grav.20:3483-3492,2003 | 10.1088/0264-9381/20/15/314 | null | gr-qc hep-th | null | We show that the path integral for the three-dimensional SU(2) BF theory with
a Wilson loop or a spin network function inserted can be understood as the
Rovelli-Smolin loop transform of a wavefunction in the Ashtekar connection
representation, where the wavefunction satisfies the constraints of quantum
general relati... | [
{
"created": "Tue, 14 Jan 2003 17:08:21 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 2003 13:06:48 GMT",
"version": "v2"
}
] | 2009-01-16 | [
[
"Mikovic",
"A.",
""
]
] | We show that the path integral for the three-dimensional SU(2) BF theory with a Wilson loop or a spin network function inserted can be understood as the Rovelli-Smolin loop transform of a wavefunction in the Ashtekar connection representation, where the wavefunction satisfies the constraints of quantum general relativi... |
2011.12305 | Justin Feng | Justin C. Feng and Shinji Mukohyama and Sante Carloni | Minimal exponential measure model in the post-Newtonian limit | 14 pages, 3 figures. Matches published version | Phys. Rev. D 103, 084055 (2021) | 10.1103/PhysRevD.103.084055 | YITP-20-152, IPMU20-0122 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the post-Newtonian limit of the minimal exponential measure (MEMe)
model presented in [J. C. Feng, S. Carloni, Phys. Rev. D 101, 064002 (2020)]
using an extension of the parameterized post-Newtonian (PPN) formalism which is
also suitable for other type-I minimally modified Gravity theories. The new PPN
exp... | [
{
"created": "Tue, 24 Nov 2020 19:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Apr 2021 16:09:49 GMT",
"version": "v2"
}
] | 2021-04-30 | [
[
"Feng",
"Justin C.",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Carloni",
"Sante",
""
]
] | We examine the post-Newtonian limit of the minimal exponential measure (MEMe) model presented in [J. C. Feng, S. Carloni, Phys. Rev. D 101, 064002 (2020)] using an extension of the parameterized post-Newtonian (PPN) formalism which is also suitable for other type-I minimally modified Gravity theories. The new PPN expan... |
2103.14555 | V. G. Gurzadyan | V.G. Gurzadyan, A. Stepanian | Cosmological constant, information and gedanken experiments with black
hole horizons | 7 pages; Eur Phys J Plus (in press); the published version | Eur. Phys. J. Plus 136, 361 (2021) | 10.1140/epjp/s13360-021-01374-3 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The cosmological constant if considered as a fundamental constant, provides
an information treatment for gravitation problems, both cosmological and of
black holes. The efficiency of that approach is shown via gedanken experiments
for the information behavior of the horizons for Schwarzschild-de Sitter and
Kerr-de Si... | [
{
"created": "Thu, 25 Mar 2021 07:27:07 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Apr 2021 11:47:05 GMT",
"version": "v2"
}
] | 2021-04-08 | [
[
"Gurzadyan",
"V. G.",
""
],
[
"Stepanian",
"A.",
""
]
] | The cosmological constant if considered as a fundamental constant, provides an information treatment for gravitation problems, both cosmological and of black holes. The efficiency of that approach is shown via gedanken experiments for the information behavior of the horizons for Schwarzschild-de Sitter and Kerr-de Sitt... |
2406.05150 | Iarley P. Lobo Dr | Iarley P. Lobo, Christian Pfeifer | Experimental Bounds on Deformed Muon Lifetime Dilation | 4 pages | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We analyze Planck scale induced modifications of the relativistic time
dilation using data from the Muon Storage Ring experiment at CERN. By examining
the lifetimes of muons, we establish, for the first time, a constraint on such
quantum gravity-inspired deformations using this channel.
| [
{
"created": "Mon, 3 Jun 2024 21:28:17 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Lobo",
"Iarley P.",
""
],
[
"Pfeifer",
"Christian",
""
]
] | We analyze Planck scale induced modifications of the relativistic time dilation using data from the Muon Storage Ring experiment at CERN. By examining the lifetimes of muons, we establish, for the first time, a constraint on such quantum gravity-inspired deformations using this channel. |
2211.08821 | David Rumler | David Rumler, Andreas Kleinw\"achter, Reinhard Meinel | Geometry of charged rotating discs of dust in Einstein-Maxwell theory | 26 pages, 16 figures; v4: correction in section 5.6 | Gen Relativ Gravit 55, 35 (2023) | 10.1007/s10714-023-03086-8 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Within the framework of Einstein-Maxwell theory geometric properties of
charged rotating discs of dust, using a post-Newtonian expansion up to tenth
order, are discussed. Investigating the disc's proper radius and the proper
circumference allows us to address questions related to the Ehrenfest paradox.
In the Newtoni... | [
{
"created": "Wed, 16 Nov 2022 10:40:10 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 2022 15:10:31 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Jan 2023 10:51:36 GMT",
"version": "v3"
},
{
"created": "Mon, 13 Feb 2023 14:39:14 GMT",
"version": "v4"
}
] | 2023-02-14 | [
[
"Rumler",
"David",
""
],
[
"Kleinwächter",
"Andreas",
""
],
[
"Meinel",
"Reinhard",
""
]
] | Within the framework of Einstein-Maxwell theory geometric properties of charged rotating discs of dust, using a post-Newtonian expansion up to tenth order, are discussed. Investigating the disc's proper radius and the proper circumference allows us to address questions related to the Ehrenfest paradox. In the Newtonian... |
1807.08628 | Alan Coley | Alan A. Coley | Mathematical General Relativity | null | null | 10.1007/s10714-019-2559-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a number of open problems within general relativity. After a brief
introduction to some technical mathematical issues and the famous singularity
theorems, we discuss the cosmic censorship hypothesis and the Penrose
inequality, the uniqueness of black hole solutions and the stability of Kerr
spacetime and t... | [
{
"created": "Thu, 19 Jul 2018 23:18:35 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Aug 2018 01:57:17 GMT",
"version": "v2"
}
] | 2019-07-10 | [
[
"Coley",
"Alan A.",
""
]
] | We present a number of open problems within general relativity. After a brief introduction to some technical mathematical issues and the famous singularity theorems, we discuss the cosmic censorship hypothesis and the Penrose inequality, the uniqueness of black hole solutions and the stability of Kerr spacetime and the... |
gr-qc/0411024 | Lorenzo Iorio | Lorenzo Iorio | On the reliability of the so far performed tests for measuring the
Lense-Thirring effect with the LAGEOS satellites | LaTex2e, 22 pages, 1 figure, 1 table, 60 references. Conclusions and
Table of Contents added. Estimates of the impact of J6dot on the
node-node-perigee combination presented. Typos corrected and minor stylistic
changes. Small changes due to G. Melki useful remarks. Lense-Thirring
'memory' effect in EIGEN-GRACE0... | New Astron. 10 (2005) 603-615 | 10.1016/j.newast.2005.01.001 | null | gr-qc astro-ph physics.geo-ph | null | In this paper we will show in detail that the performed attempts aimed at the
detection of the general relativistic Lense-Thirring effect in the
gravitational field of the Earth with the existing LAGEOS satellites are often
presented in an optimistic and misleading way which is inadequate for such an
important test o... | [
{
"created": "Thu, 4 Nov 2004 14:22:06 GMT",
"version": "v1"
},
{
"created": "Sun, 15 May 2005 14:19:27 GMT",
"version": "v10"
},
{
"created": "Fri, 5 Nov 2004 16:24:45 GMT",
"version": "v2"
},
{
"created": "Sun, 7 Nov 2004 14:32:41 GMT",
"version": "v3"
},
{
"cre... | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we will show in detail that the performed attempts aimed at the detection of the general relativistic Lense-Thirring effect in the gravitational field of the Earth with the existing LAGEOS satellites are often presented in an optimistic and misleading way which is inadequate for such an important test of ... |
2111.01065 | Ernesto Nungesser | Ho Lee, Ernesto Nungesser and John Stalker | On almost Ehlers-Geren-Sachs theorems | 26 pages, 1 figure; matches accepted version in CQG; presentation
improved, minor typos corrected | 2022 Class. Quantum Grav. 39 105006 | 10.1088/1361-6382/ac655c | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We show assuming small data that massless solutions to the reflection
symmetric Einstein-Vlasov system with Bianchi VII$_0$ symmetry which are not
locally rotational symmetric, can be arbitrarily close to and will remain close
to isotropy as regards {to} the shear. However in general the shear will not
tend to zero a... | [
{
"created": "Mon, 1 Nov 2021 16:28:39 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2022 19:20:21 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Lee",
"Ho",
""
],
[
"Nungesser",
"Ernesto",
""
],
[
"Stalker",
"John",
""
]
] | We show assuming small data that massless solutions to the reflection symmetric Einstein-Vlasov system with Bianchi VII$_0$ symmetry which are not locally rotational symmetric, can be arbitrarily close to and will remain close to isotropy as regards {to} the shear. However in general the shear will not tend to zero and... |
1103.2569 | Hideyoshi Arakida | Hideyoshi Arakida | Application of Time Transfer Function to McVittie Spacetime:
Gravitational Time Delay and Secular Increase in Astronomical Unit | 13 pages, 2 figures, accepted for publication in General Relativity
and Gravitation | General Relativity and Gravitation, Volume 43, Issue 8,
pp.2127-2139 (2011) | 10.1007/s10714-011-1170-1 | null | gr-qc astro-ph.CO astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to calculate the gravitational time delay in a time-dependent
gravitational field, especially in McVittie spacetime, which can be considered
as the spacetime around a gravitating body such as the Sun, embedded in the
FLRW (Friedmann-Lema\^itre-Robertson-Walker) cosmological background metric. To
this end, ... | [
{
"created": "Mon, 14 Mar 2011 00:42:18 GMT",
"version": "v1"
}
] | 2012-02-07 | [
[
"Arakida",
"Hideyoshi",
""
]
] | We attempt to calculate the gravitational time delay in a time-dependent gravitational field, especially in McVittie spacetime, which can be considered as the spacetime around a gravitating body such as the Sun, embedded in the FLRW (Friedmann-Lema\^itre-Robertson-Walker) cosmological background metric. To this end, we... |
2103.09326 | Carlos O. Lousto | Nicole Rosato, James Healy, and Carlos O. Lousto | Adapted gauge to small mass ratio binary black hole evolutions | 22 pages, 21 figures, 8 tables | Phys. Rev. D 103, 104068 (2021) | 10.1103/PhysRevD.103.104068 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the benefits of adapted gauges to small mass ratio binary black
hole evolutions in the moving puncture formulation. We find expressions that
approximate the late time behavior of the lapse and shift,
$(\alpha_0,\beta_0)$, and use them as initial values for their evolutions. We
also use a position and black... | [
{
"created": "Tue, 16 Mar 2021 21:07:59 GMT",
"version": "v1"
}
] | 2021-06-02 | [
[
"Rosato",
"Nicole",
""
],
[
"Healy",
"James",
""
],
[
"Lousto",
"Carlos O.",
""
]
] | We explore the benefits of adapted gauges to small mass ratio binary black hole evolutions in the moving puncture formulation. We find expressions that approximate the late time behavior of the lapse and shift, $(\alpha_0,\beta_0)$, and use them as initial values for their evolutions. We also use a position and black h... |
1011.4987 | Christopher M. Hirata | Christopher M Hirata | Resonant recoil in extreme mass ratio binary black hole mergers | fixed references; matches PRD accepted version (minor revision); 9
pages, 2 figures | Phys.Rev.D83:104024,2011 | 10.1103/PhysRevD.83.104024 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inspiral and merger of a binary black hole system generally leads to an
asymmetric distribution of emitted radiation, and hence a recoil of the remnant
black hole directed opposite to the net linear momentum radiated. The recoil
velocity is generally largest for comparable mass black holes and particular
spin con... | [
{
"created": "Tue, 23 Nov 2010 01:55:10 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 2011 17:52:37 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Jun 2011 21:35:41 GMT",
"version": "v3"
}
] | 2011-06-10 | [
[
"Hirata",
"Christopher M",
""
]
] | The inspiral and merger of a binary black hole system generally leads to an asymmetric distribution of emitted radiation, and hence a recoil of the remnant black hole directed opposite to the net linear momentum radiated. The recoil velocity is generally largest for comparable mass black holes and particular spin confi... |
0909.3767 | Claus Kiefer | Claus Kiefer | Does time exist in quantum gravity? | 10 pages, second prize of the FQXi "The Nature of Time" essay contest | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time is absolute in standard quantum theory and dynamical in general
relativity. The combination of both theories into a theory of quantum gravity
leads therefore to a "problem of time". In my essay I shall investigate those
consequences for the concept of time that may be drawn without a detailed
knowledge of quantu... | [
{
"created": "Mon, 21 Sep 2009 13:19:59 GMT",
"version": "v1"
}
] | 2009-09-22 | [
[
"Kiefer",
"Claus",
""
]
] | Time is absolute in standard quantum theory and dynamical in general relativity. The combination of both theories into a theory of quantum gravity leads therefore to a "problem of time". In my essay I shall investigate those consequences for the concept of time that may be drawn without a detailed knowledge of quantum ... |
2006.09843 | Lorenzo Gavassino | Lorenzo Gavassino, Marco Antonelli and Brynmor Haskell | When the entropy has no maximum: A new perspective on the instability of
the first-order theories of dissipation | 18 pages, 5 figures, published on PRD | Phys. Rev. D 102, 043018 (2020) | 10.1103/PhysRevD.102.043018 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first-order relativistic fluid theories of dissipation proposed by Eckart
and Landau-Lifshitz have been proved to be unstable. They admit solutions which
start in proximity of equilibrium and depart exponentially from it. We show
that this behaviour is due to the fact that the total entropy of these fluids,
restr... | [
{
"created": "Wed, 17 Jun 2020 13:15:30 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Aug 2020 06:15:29 GMT",
"version": "v2"
}
] | 2020-09-02 | [
[
"Gavassino",
"Lorenzo",
""
],
[
"Antonelli",
"Marco",
""
],
[
"Haskell",
"Brynmor",
""
]
] | The first-order relativistic fluid theories of dissipation proposed by Eckart and Landau-Lifshitz have been proved to be unstable. They admit solutions which start in proximity of equilibrium and depart exponentially from it. We show that this behaviour is due to the fact that the total entropy of these fluids, restric... |
1002.4168 | Willians Barreto | W. Barreto (ULA), L. Castillo (UDO) and E. Barrios (ULA) | Bondian frames to couple matter with radiation | 20 pages, 6 figures; to appear in General Relativity and Gravitation | General Relativity and Gravitation, 42, 1845 (2010) | 10.1007/s10714-010-0954-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A study is presented for the non linear evolution of a self gravitating
distribution of matter coupled to a massless scalar field. The characteristic
formulation for numerical relativity is used to follow the evolution by a
sequence of light cones open to the future. Bondian frames are used to endow
physical meaning ... | [
{
"created": "Mon, 22 Feb 2010 19:11:18 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Barreto",
"W.",
"",
"ULA"
],
[
"Castillo",
"L.",
"",
"UDO"
],
[
"Barrios",
"E.",
"",
"ULA"
]
] | A study is presented for the non linear evolution of a self gravitating distribution of matter coupled to a massless scalar field. The characteristic formulation for numerical relativity is used to follow the evolution by a sequence of light cones open to the future. Bondian frames are used to endow physical meaning to... |
1205.1037 | Taymaz Ghaneh | Taymaz Ghaneh, Farhad Darabi, Hossein Motavalli | Signature Change in Noncommutative FRW Cosmology | 15 pages, 4 figures, Minor revision, references added | Mod. Phys. Lett. A, Vol. 27, No. 37 (2012) 1250214 | 10.1142/S0217732312502148 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conditions for which the no boundary proposal may have a classical
realization of a continuous change of signature, are investigated for a
cosmological model described by FRW metric coupled with a self interacting
scalar field, having a noncommutative phase space of dynamical variables. The
model is then quantize... | [
{
"created": "Fri, 4 May 2012 18:55:15 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Sep 2012 05:37:47 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Dec 2012 06:39:12 GMT",
"version": "v3"
}
] | 2012-12-06 | [
[
"Ghaneh",
"Taymaz",
""
],
[
"Darabi",
"Farhad",
""
],
[
"Motavalli",
"Hossein",
""
]
] | The conditions for which the no boundary proposal may have a classical realization of a continuous change of signature, are investigated for a cosmological model described by FRW metric coupled with a self interacting scalar field, having a noncommutative phase space of dynamical variables. The model is then quantized ... |
0910.5925 | Douglas Urban | Douglas Urban, Ken D. Olum | Averaged null energy condition violation in a conformally flat spacetime | 11 pages | PhysRevD.81.024039,2010 | 10.1103/PhysRevD.81.024039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the averaged null energy condition can be violated by a
conformally coupled scalar field in a conformally flat spacetime in 3+1
dimensions. The violation is dependent on the quantum state and can be made as
large as desired. It does not arise from the presence of anomalies, although
anomalous violations ... | [
{
"created": "Fri, 30 Oct 2009 19:59:16 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2010 05:24:05 GMT",
"version": "v2"
}
] | 2010-01-28 | [
[
"Urban",
"Douglas",
""
],
[
"Olum",
"Ken D.",
""
]
] | We show that the averaged null energy condition can be violated by a conformally coupled scalar field in a conformally flat spacetime in 3+1 dimensions. The violation is dependent on the quantum state and can be made as large as desired. It does not arise from the presence of anomalies, although anomalous violations ar... |
gr-qc/0310065 | Sergei Kopeikin M. | Sergei M. Kopeikin (UMC) and Edward B. Fomalont (NRAO) | On the Speed of Gravity and Relativistic v/c Corrections to the Shapiro
Time Delay | 7 pages. Final version published in Physics Letters A | Phys.Lett. A355 (2006) 163-166 | 10.1016/j.physleta.2006.02.028 | null | gr-qc astro-ph hep-th | null | Recent papers by Samuel declared that the linearized post-Newtonian v/c
effects are too small to have been measured in the recent experiment involving
Jupiter and quasar J0842+1845 that was used to measure the ultimate speed of
gravity defined as a fundamental constant entering in front of each time
derivative of the... | [
{
"created": "Mon, 13 Oct 2003 20:10:00 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Mar 2004 05:36:19 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Feb 2006 20:08:51 GMT",
"version": "v3"
},
{
"created": "Thu, 9 Feb 2006 22:44:44 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Kopeikin",
"Sergei M.",
"",
"UMC"
],
[
"Fomalont",
"Edward B.",
"",
"NRAO"
]
] | Recent papers by Samuel declared that the linearized post-Newtonian v/c effects are too small to have been measured in the recent experiment involving Jupiter and quasar J0842+1845 that was used to measure the ultimate speed of gravity defined as a fundamental constant entering in front of each time derivative of the m... |
0806.2805 | Frans Klinkhamer | F.R. Klinkhamer, G.E. Volovik | Dynamic vacuum variable and equilibrium approach in cosmology | 24 (not 25) pages, v7(=v6 with latex problem corrected): published
version in preprint style | Phys.Rev.D78:063528,2008 | 10.1103/PhysRevD.78.063528 | KA-TP-14-2008 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modified-gravity theory is considered with a four-form field strength F, a
variable gravitational coupling parameter G(F), and a standard matter action.
This theory provides a concrete realization of the general vacuum variable q as
the four-form amplitude F and allows for a study of its dynamics. The theory
gives ... | [
{
"created": "Tue, 17 Jun 2008 17:42:56 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Jun 2008 15:44:23 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Jun 2008 12:32:48 GMT",
"version": "v3"
},
{
"created": "Fri, 25 Jul 2008 14:33:56 GMT",
"version": "v4"
},
{
"c... | 2009-11-13 | [
[
"Klinkhamer",
"F. R.",
""
],
[
"Volovik",
"G. E.",
""
]
] | A modified-gravity theory is considered with a four-form field strength F, a variable gravitational coupling parameter G(F), and a standard matter action. This theory provides a concrete realization of the general vacuum variable q as the four-form amplitude F and allows for a study of its dynamics. The theory gives a ... |
1304.7597 | Sandipan Sengupta | Sandipan Sengupta | Gravity Asymptotics with Topological Parameters | References added; Published version | Phys. Rev. D 88, 024031 (2013) | 10.1103/PhysRevD.88.024031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In four dimensional gravity theory, the Barbero-Immirzi parameter has a
topological origin, and can be identified as the coefficient multiplying the
Nieh-Yan topological density in the gravity Lagrangian, as proposed by Date et
al.[1]. Based on this fact, a first order action formulation for spacetimes
with boundarie... | [
{
"created": "Mon, 29 Apr 2013 09:06:52 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jul 2013 06:20:00 GMT",
"version": "v2"
}
] | 2013-07-29 | [
[
"Sengupta",
"Sandipan",
""
]
] | In four dimensional gravity theory, the Barbero-Immirzi parameter has a topological origin, and can be identified as the coefficient multiplying the Nieh-Yan topological density in the gravity Lagrangian, as proposed by Date et al.[1]. Based on this fact, a first order action formulation for spacetimes with boundaries ... |
gr-qc/0301007 | M. M. Akbar | M.M. Akbar | Classical Boundary-value Problem in Riemannian Quantum Gravity and
Taub-Bolt-anti-de Sitter Geometries | Minor changes and references added: Version in the Journal | Nucl.Phys. B663 (2003) 215-230 | 10.1016/S0550-3213(03)00376-6 | DAMTP-2002-36 | gr-qc hep-th | null | For an $SU(2)\times U(1)$-invariant $S^3$ boundary the classical Dirichlet
problem of Riemannian quantum gravity is studied for positive-definite regular
solutions of the Einstein equations with a negative cosmological constant
within biaxial Bianchi-IX metrics containing bolts, i.e., within the family of
Taub-Bolt-a... | [
{
"created": "Mon, 6 Jan 2003 19:30:32 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Aug 2003 23:47:02 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Akbar",
"M. M.",
""
]
] | For an $SU(2)\times U(1)$-invariant $S^3$ boundary the classical Dirichlet problem of Riemannian quantum gravity is studied for positive-definite regular solutions of the Einstein equations with a negative cosmological constant within biaxial Bianchi-IX metrics containing bolts, i.e., within the family of Taub-Bolt-ant... |
2401.06863 | Lei Lu | Lei Lu, Philip A. May | Step-by-Step Canonical Quantum Gravity -- Part I: Ashtekar's New
Variables | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Canonical quantum gravity was first developed by Abhay Ashtekar, Lee Smolin,
Carlo Rovelli and their collaborators in the late 1980s. It was a major
breakthrough that successfully brought Einstein's theory of General Relativity
(GR) into a Yang-Mills-type gauge theory. A new era of quantum gravity research
has since ... | [
{
"created": "Fri, 12 Jan 2024 19:26:14 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Lu",
"Lei",
""
],
[
"May",
"Philip A.",
""
]
] | Canonical quantum gravity was first developed by Abhay Ashtekar, Lee Smolin, Carlo Rovelli and their collaborators in the late 1980s. It was a major breakthrough that successfully brought Einstein's theory of General Relativity (GR) into a Yang-Mills-type gauge theory. A new era of quantum gravity research has since st... |
2104.03660 | Masato Minamitsuji | Masato Minamitsuji | Disformal transformation of physical quantities associated with
relativistic stars | 11 pages, no figure, published version | Phys. Rev. D 103, 084002 (2021) | 10.1103/PhysRevD.103.084002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how physical quantities associated with relativistic stars in
the Jordan and Einstein frames are related by the generalized disformal
transformations constructed by the scalar and vector fields within the
slow-rotation approximation. We consider the most general scalar disformal
transformation construc... | [
{
"created": "Thu, 8 Apr 2021 10:22:37 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Oct 2021 07:16:02 GMT",
"version": "v2"
}
] | 2021-10-19 | [
[
"Minamitsuji",
"Masato",
""
]
] | We investigate how physical quantities associated with relativistic stars in the Jordan and Einstein frames are related by the generalized disformal transformations constructed by the scalar and vector fields within the slow-rotation approximation. We consider the most general scalar disformal transformation constructe... |
1807.11033 | Oleg Zaslavskii | O. B. Zaslavskii | Super-Penrose process and rotating wormholes | 9 pages. Presentation improved, misprints corrected. To appear in PRD | Phys. Rev. D 98, 104030 (2018) | 10.1103/PhysRevD.98.104030 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision of particles in a wormhole near its throat. Particles
come from the opposite mouths. If the lapse function is small enough there, the
energy $E$ of debris at infinity grows unbounded, so we are faced with the
so-called super-Penrose process. This requires the existence of the ergoregion,
so a wo... | [
{
"created": "Sun, 29 Jul 2018 09:59:34 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Nov 2018 19:09:03 GMT",
"version": "v2"
}
] | 2018-11-28 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision of particles in a wormhole near its throat. Particles come from the opposite mouths. If the lapse function is small enough there, the energy $E$ of debris at infinity grows unbounded, so we are faced with the so-called super-Penrose process. This requires the existence of the ergoregion, so a worm... |
gr-qc/0202069 | Marc Henneaux | Thibault Damour, Marc Henneaux, Alan D. Rendall and Marsha Weaver | Kasner-like behaviour for subcritical Einstein-matter systems | LaTeX, 56 pages; minor corrections; version to appear in ``Annales
Henri Poincar\'e" | Annales Henri Poincare 3 (2002) 1049-1111 | null | IHES/P/02/06, ULB-TH-02/01 | gr-qc hep-th | null | Confirming previous heuristic analyses \`a la Belinskii-Khalatnikov-Lifshitz,
it is rigorously proven that certain ``subcritical'' Einstein-matter systems
exhibit a monotone, generalized Kasner behaviour in the vicinity of a spacelike
singularity. The D-dimensional coupled Einstein-dilaton-p-form system is
subcritica... | [
{
"created": "Tue, 19 Feb 2002 10:40:29 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Sep 2002 06:44:06 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Damour",
"Thibault",
""
],
[
"Henneaux",
"Marc",
""
],
[
"Rendall",
"Alan D.",
""
],
[
"Weaver",
"Marsha",
""
]
] | Confirming previous heuristic analyses \`a la Belinskii-Khalatnikov-Lifshitz, it is rigorously proven that certain ``subcritical'' Einstein-matter systems exhibit a monotone, generalized Kasner behaviour in the vicinity of a spacelike singularity. The D-dimensional coupled Einstein-dilaton-p-form system is subcritical ... |
1809.03500 | Emanuele Berti | Vishal Baibhav, Emanuele Berti | Multi-mode black hole spectroscopy | 11 pages, 7 figures, 2 tables | Phys. Rev. D 99, 024005 (2019) | 10.1103/PhysRevD.99.024005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first two LIGO/Virgo observing runs have detected several black hole
binary mergers. One of the most exciting prospects of future observing runs is
the possibility to identify the remnants of these mergers as Kerr black holes
by measuring their (complex) quasinormal mode frequencies. This idea - similar
to the id... | [
{
"created": "Mon, 10 Sep 2018 18:00:00 GMT",
"version": "v1"
}
] | 2019-01-09 | [
[
"Baibhav",
"Vishal",
""
],
[
"Berti",
"Emanuele",
""
]
] | The first two LIGO/Virgo observing runs have detected several black hole binary mergers. One of the most exciting prospects of future observing runs is the possibility to identify the remnants of these mergers as Kerr black holes by measuring their (complex) quasinormal mode frequencies. This idea - similar to the iden... |
1804.09101 | Adam Lewis | Adam G. M. Lewis and Harald P. Pfeiffer | GPU-Accelerated Simulations of Isolated Black Holes | 42 pages, 11 figures | Class. Quant. Grav. 35 (2018) 095017 | 10.1088/1361-6382/aab256 | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a port of the numerical relativity code SpEC which is capable of
running on NVIDIA GPUs. Since this code must be maintained in parallel with
SpEC itself, a primary design consideration is to perform as few explicit code
changes as possible. We therefore rely on a hierarchy of automated porting
strategies. ... | [
{
"created": "Tue, 24 Apr 2018 15:39:16 GMT",
"version": "v1"
}
] | 2018-05-09 | [
[
"Lewis",
"Adam G. M.",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | We present a port of the numerical relativity code SpEC which is capable of running on NVIDIA GPUs. Since this code must be maintained in parallel with SpEC itself, a primary design consideration is to perform as few explicit code changes as possible. We therefore rely on a hierarchy of automated porting strategies. At... |
2208.08582 | Nelson Velandia | Nelson Velandia SJ, Alfonso Leyva, Javier Alexander Cano-Arango | The Ricci Rotation Coefficients in the description of trajectories of
spinning test particles off-equatorial planes in a rotational gravitational
field | 15 pages, 4 figures, Numerical relativity | International Journal of Theoretical Physics, Volume 63, article
number 37, (2024) | 10.1007/s10773-024-05562-6 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We describe the trajectories of circular orbits of spinless and spinning test
particles around of rotating bodies in equatorial and non-equatorial planes via
the Mathisson-Papapetrou-Dixon equations which include the Ricci rotation
coefficients with the purpose of describing not only the curvature of space
time, but ... | [
{
"created": "Thu, 18 Aug 2022 01:00:07 GMT",
"version": "v1"
}
] | 2024-02-12 | [
[
"SJ",
"Nelson Velandia",
""
],
[
"Leyva",
"Alfonso",
""
],
[
"Cano-Arango",
"Javier Alexander",
""
]
] | We describe the trajectories of circular orbits of spinless and spinning test particles around of rotating bodies in equatorial and non-equatorial planes via the Mathisson-Papapetrou-Dixon equations which include the Ricci rotation coefficients with the purpose of describing not only the curvature of space time, but al... |
2011.04423 | Ali \"Ovg\"un Dr. | Ali \"Ovg\"un | Weak deflection angle of black-bounce traversable wormholes using
Gauss-Bonnet theorem in the dark matter medium | 8 pages. Accepted for publication in Turkish Journal of Physics | Turk J Phys, 44, (2020), 465-471 | 10.3906/fiz-2008-11 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we first use the optical metrics of black-bounce traversable
wormholes to calculate the Gaussian curvature. Then we use the Gauss-Bonnet
theorem to obtain the weak deflection angle of light from the black-bounce
traversable wormholes. Then we investigate the effect of dark matter medium on
weak deflect... | [
{
"created": "Thu, 5 Nov 2020 18:34:31 GMT",
"version": "v1"
}
] | 2020-11-10 | [
[
"Övgün",
"Ali",
""
]
] | In this paper, we first use the optical metrics of black-bounce traversable wormholes to calculate the Gaussian curvature. Then we use the Gauss-Bonnet theorem to obtain the weak deflection angle of light from the black-bounce traversable wormholes. Then we investigate the effect of dark matter medium on weak deflectio... |
2404.19225 | Wenfu Cao | Wenfu Cao, Xin Wu, Jun Lyu | Electromagnetic field and chaotic charged-particle motion around hairy
black holes in Horndeski gravity | 18 pages,9 figures, EPJC (2024) | null | 10.1140/epjc/s10052-024-12804-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Wald vector potential is an exact solution of the source-less Maxwell
equations regarding an electromagnetic field of a vacuum uncharged black hole
like the Kerr background black hole in an asymptotically uniform magnetic
field. However, it is not if the black hole is a nonvacuum solution in a theory
of modified ... | [
{
"created": "Tue, 30 Apr 2024 03:06:50 GMT",
"version": "v1"
}
] | 2024-05-01 | [
[
"Cao",
"Wenfu",
""
],
[
"Wu",
"Xin",
""
],
[
"Lyu",
"Jun",
""
]
] | The Wald vector potential is an exact solution of the source-less Maxwell equations regarding an electromagnetic field of a vacuum uncharged black hole like the Kerr background black hole in an asymptotically uniform magnetic field. However, it is not if the black hole is a nonvacuum solution in a theory of modified gr... |
gr-qc/0109050 | Vladimir | V. Dzhunushaliev | Polarized Spacetime Foam | essential changes in the text | Found.Phys. 32 (2002) 1069-1090 | null | null | gr-qc astro-ph hep-th | null | An approximate model of a spacetime foam is presented. It is supposed that in
the spacetime foam each quantum handle is like to an electric dipole and
therefore the spacetime foam is similar to a dielectric. If we neglect of
linear sizes of the quantum handle then it can be described with an operator
containing a Gra... | [
{
"created": "Fri, 14 Sep 2001 03:12:21 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2002 03:12:59 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Dzhunushaliev",
"V.",
""
]
] | An approximate model of a spacetime foam is presented. It is supposed that in the spacetime foam each quantum handle is like to an electric dipole and therefore the spacetime foam is similar to a dielectric. If we neglect of linear sizes of the quantum handle then it can be described with an operator containing a Grass... |
gr-qc/0403071 | Sophie Pireaux | S. Pireaux | Light deflection in Weyl gravity: critical distances for photon paths | 20 pages, 9 figures (see published version for a better resolution,
or online version at stacks.iop.org/CQG/21/1897) | Class.Quant.Grav. 21 (2004) 1897-1913 | 10.1088/0264-9381/21/7/011 | null | gr-qc astro-ph | null | The Weyl gravity appears to be a very peculiar theory. The contribution of
the Weyl linear parameter to the effective geodesic potential is opposite for
massive and nonmassive geodesics. However, photon geodesics do not depend on
the unknown conformal factor, unlike massive geodesics. Hence light deflection
offers an... | [
{
"created": "Tue, 16 Mar 2004 18:21:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pireaux",
"S.",
""
]
] | The Weyl gravity appears to be a very peculiar theory. The contribution of the Weyl linear parameter to the effective geodesic potential is opposite for massive and nonmassive geodesics. However, photon geodesics do not depend on the unknown conformal factor, unlike massive geodesics. Hence light deflection offers an i... |
gr-qc/0502019 | Mohammad Vahid Takook | Shahriar Rouhani and Mohammad Vahid Takook | Abelian Gauge Theory in de Sitter Space | 10 pages, typos corrected, reference added | Mod.Phys.Lett. A20 (2005) 2387-2396 | 10.1142/S0217732305018347 | null | gr-qc | null | Quantization of spinor and vector free fields in 4-dimensional de Sitter
space-time, in the ambient space notation, has been studied in the previous
works. Various two-points functions for the above fields are presented in this
paper. The interaction between the spinor field and the vector field is then
studied by th... | [
{
"created": "Sat, 5 Feb 2005 17:47:02 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Oct 2005 12:51:24 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Rouhani",
"Shahriar",
""
],
[
"Takook",
"Mohammad Vahid",
""
]
] | Quantization of spinor and vector free fields in 4-dimensional de Sitter space-time, in the ambient space notation, has been studied in the previous works. Various two-points functions for the above fields are presented in this paper. The interaction between the spinor field and the vector field is then studied by the ... |
gr-qc/0405064 | Salvatore Antoci | S. Antoci, D.-E. Liebscher and L. Mihich | The Electrostatics of Einstein's Unified Field Theory | 15 pages. Misprints corrected. To appear in General Relativity and
Gravitation | Gen.Rel.Grav. 37 (2005) 1191-1203 | 10.1007/s10714-005-0104-1 | null | gr-qc | null | When sources are added at their right-hand sides, and g_{(ik)} is a priori
assumed to be the metric, the equations of Einstein's Hermitian theory of
relativity were shown to allow for an exact solution that describes the general
electrostatic field of n point charges. Moreover, the injunction of spherical
symmetry of... | [
{
"created": "Wed, 12 May 2004 16:44:45 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Jun 2004 15:31:59 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Feb 2005 15:30:01 GMT",
"version": "v3"
},
{
"created": "Thu, 9 Jun 2005 09:53:49 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Antoci",
"S.",
""
],
[
"Liebscher",
"D. -E.",
""
],
[
"Mihich",
"L.",
""
]
] | When sources are added at their right-hand sides, and g_{(ik)} is a priori assumed to be the metric, the equations of Einstein's Hermitian theory of relativity were shown to allow for an exact solution that describes the general electrostatic field of n point charges. Moreover, the injunction of spherical symmetry of g... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.