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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0805.3329 | Kayll Lake | C\'edric Grenon, Pascal J. Elahi and Kayll Lake | Transforming the Einstein static Universe into physically acceptable
static fluid spheres II: A two - fold infinity of exact solutions | 6 pages, 6 figures, revtex4,improved figures. To appear in Phys. Rev.
D | Phys.Rev.D78:044028,2008 | 10.1103/PhysRevD.78.044028 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following a solution generating technique introduced recently by one of us,
we transform the Einstein static Universe into a two - fold infinity class of
physically acceptable exact perfect fluid solutions of Einstein's equations.
Whereas the entire class of solutions can be considered as generalizations of
the famil... | [
{
"created": "Wed, 21 May 2008 18:41:49 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jul 2008 21:13:10 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Grenon",
"Cédric",
""
],
[
"Elahi",
"Pascal J.",
""
],
[
"Lake",
"Kayll",
""
]
] | Following a solution generating technique introduced recently by one of us, we transform the Einstein static Universe into a two - fold infinity class of physically acceptable exact perfect fluid solutions of Einstein's equations. Whereas the entire class of solutions can be considered as generalizations of the familia... |
0707.0347 | Metin Gurses | Metin Gurses | Gauss-Bonnet Gravity with Scalar Field in Four Dimensions | Latex file, 7 pages | null | 10.1007/s10714-007-0579-z | null | gr-qc hep-th | null | We give all exact solutions of the Einstein-Gauss-Bonnet Field Equations
coupled with a scalar field in four dimensions under certain assumptions.
| [
{
"created": "Tue, 3 Jul 2007 07:20:31 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jul 2007 18:22:34 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Jul 2007 10:32:59 GMT",
"version": "v3"
},
{
"created": "Thu, 3 Jan 2008 14:00:31 GMT",
"version": "v4"
}
] | 2015-05-13 | [
[
"Gurses",
"Metin",
""
]
] | We give all exact solutions of the Einstein-Gauss-Bonnet Field Equations coupled with a scalar field in four dimensions under certain assumptions. |
gr-qc/0507072 | Bernard Linet | Bernard Linet | Black holes in which the electrostatic or scalar equation is solvable in
closed form | 20 pages, no figure | Gen.Rel.Grav.37:2145-2163,2005 | 10.1007/s10714-005-0200-2 | null | gr-qc | null | We show that the method used in the Schwarzschild black hole for finding the
elementary solution of the electrostatic equation in closed form cannot extend
in higher dimensions. By contrast, we prove the existence of static,
spherically symmetric geometries with a non-degenerated horizon in which the
static scalar eq... | [
{
"created": "Mon, 18 Jul 2005 08:26:22 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Linet",
"Bernard",
""
]
] | We show that the method used in the Schwarzschild black hole for finding the elementary solution of the electrostatic equation in closed form cannot extend in higher dimensions. By contrast, we prove the existence of static, spherically symmetric geometries with a non-degenerated horizon in which the static scalar equa... |
1407.2009 | Saskia Grunau | Saskia Grunau | Charged dilatonic black rings and black saturns and their thermodynamics | Added references; added calculation of the indivudial charges of the
ring and the sphere part of the dilatonic black saturn | Phys. Rev. D 90, 064022 (2014) | 10.1103/PhysRevD.90.064022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article charged black rings and black saturns are constructed in
Einstein-Maxwell-dilaton theory in five dimensions. The neutral black ring and
black saturn solutions are embedded in six dimensions and boosted with respect
to the time coordinate and the added sixth dimension. Then the charged
solutions are ob... | [
{
"created": "Tue, 8 Jul 2014 09:32:58 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Sep 2014 10:51:08 GMT",
"version": "v2"
}
] | 2014-09-16 | [
[
"Grunau",
"Saskia",
""
]
] | In this article charged black rings and black saturns are constructed in Einstein-Maxwell-dilaton theory in five dimensions. The neutral black ring and black saturn solutions are embedded in six dimensions and boosted with respect to the time coordinate and the added sixth dimension. Then the charged solutions are obta... |
1312.5247 | Lior M. Burko | Lior M. Burko and Gaurav Khanna | Mode coupling mechanism for late-time Kerr tails | 22 pages, 12 figures, 4 tables | Phys. Rev. D 89, 044037 (2014) | 10.1103/PhysRevD.89.044037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the decay rate for scalar fields in Kerr spacetime. We consider
pure initial (azimuthal) multipoles $\ell'$ with respect to the class which
includes Boyer-Lindquist coordinates, and focus attention on the decay rate of
the multipole $\ell$. We use an iterative method proposed by Gleiser, Price,
and Pullin... | [
{
"created": "Wed, 18 Dec 2013 18:00:30 GMT",
"version": "v1"
}
] | 2014-04-15 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
]
] | We consider the decay rate for scalar fields in Kerr spacetime. We consider pure initial (azimuthal) multipoles $\ell'$ with respect to the class which includes Boyer-Lindquist coordinates, and focus attention on the decay rate of the multipole $\ell$. We use an iterative method proposed by Gleiser, Price, and Pullin, ... |
2207.13732 | Anthony Guillen | Ignatios Antoniadis, Anthony Guillen and Kyriakos Tamvakis | Late time acceleration in Palatini gravity | 25 pages, 3 figures, some paragraphs added | null | 10.1007/JHEP11(2022)144 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effect of the quadratic correction $\alpha R^2$ and
non-minimal coupling $\xi \phi^2 R$ on a quintessence model with an exponential
potential $V(\phi) = M^4\exp(-\lambda\phi)$ in the Palatini formulation of
gravity. We use dynamical system techniques to analyze the attractor structure
of the model ... | [
{
"created": "Wed, 27 Jul 2022 18:15:19 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Aug 2022 20:27:29 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Nov 2022 07:48:21 GMT",
"version": "v3"
}
] | 2022-12-14 | [
[
"Antoniadis",
"Ignatios",
""
],
[
"Guillen",
"Anthony",
""
],
[
"Tamvakis",
"Kyriakos",
""
]
] | We investigate the effect of the quadratic correction $\alpha R^2$ and non-minimal coupling $\xi \phi^2 R$ on a quintessence model with an exponential potential $V(\phi) = M^4\exp(-\lambda\phi)$ in the Palatini formulation of gravity. We use dynamical system techniques to analyze the attractor structure of the model an... |
1410.0800 | Branislav Cvetkovi\'c | M. Blagojevi\'c, B. Cvetkovi\'c | Siklos waves with torsion in 3D | LaTeX, 17 pages; v2 minor changes, 4 references added | JHEP11(2014)141 | 10.1007/JHEP11(2014)141 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the Siklos waves in general relativity with a cosmological
constant, interpreted as gravitational waves on the anti-de Sitter background,
a new class of exact torsion waves is constructed in the framework of
three-dimensional gravity with propagating torsion. In the asymptotic limit,
the geometry of tor... | [
{
"created": "Fri, 3 Oct 2014 09:58:34 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Dec 2014 12:28:24 GMT",
"version": "v2"
}
] | 2014-12-08 | [
[
"Blagojević",
"M.",
""
],
[
"Cvetković",
"B.",
""
]
] | Starting from the Siklos waves in general relativity with a cosmological constant, interpreted as gravitational waves on the anti-de Sitter background, a new class of exact torsion waves is constructed in the framework of three-dimensional gravity with propagating torsion. In the asymptotic limit, the geometry of torsi... |
0904.0953 | Everton Murilo Carvalho Abreu | E. M. C. Abreu, L. P. G. De Assis, C. M. L. dos Reis | Analytical considerations about the cosmological constant and dark
energy | 15 pages, 5 figures. Revtex4 | Int.J.Mod.Phys.A24:5427-5444,2009 | 10.1142/S0217751X09046254 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The accelerated expansion of the universe has now been confirmed by several
independent observations including those of high redshift type Ia supernovae,
and the cosmic microwave background combined with the large scale structure of
the Universe. In this work we introduce families of analytical solutions for
the scal... | [
{
"created": "Mon, 6 Apr 2009 15:20:10 GMT",
"version": "v1"
}
] | 2009-11-30 | [
[
"Abreu",
"E. M. C.",
""
],
[
"De Assis",
"L. P. G.",
""
],
[
"Reis",
"C. M. L. dos",
""
]
] | The accelerated expansion of the universe has now been confirmed by several independent observations including those of high redshift type Ia supernovae, and the cosmic microwave background combined with the large scale structure of the Universe. In this work we introduce families of analytical solutions for the scale ... |
1502.02982 | Ujjal Debnath | Ujjal Debnath | Accretions of Dark Matter and Dark Energy onto ($n+2$)-dimensional
Schwarzschild Black Hole and Morris-Thorne Wormhole | 11 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied accretion of the dark matter and dark energy onto of
$(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The
mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black
hole and Morris-Thorne wormhole have been found. We have assumed some
candidates of dark ene... | [
{
"created": "Sun, 8 Feb 2015 18:21:45 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Mar 2015 09:52:58 GMT",
"version": "v2"
}
] | 2015-03-09 | [
[
"Debnath",
"Ujjal",
""
]
] | We have studied accretion of the dark matter and dark energy onto of $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole have been found. We have assumed some candidates of dark energ... |
1801.05692 | Mohammad Ghanaatian | M. Ghanaatian, F. Naeimipour, A. Bazrafshan, M. Abkar | Reissner-Nordstrom Black Holes in Quartic Quasi-Topological Gravity
Theory | 14 Pages and 28 figures | Phys. Rev. D 97, 104054 (2018) | 10.1103/PhysRevD.97.104054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we construct the exact solutions of Reissner-Nordstrom black
holes in the presence of quartic quasi-topological gravity. we obtain the
thermodynamics and conserved quantities of the solutions and check the first
law of thermodynamics. In studying the physical properties of the solutions, we
consider as... | [
{
"created": "Sun, 14 Jan 2018 23:13:40 GMT",
"version": "v1"
}
] | 2018-06-06 | [
[
"Ghanaatian",
"M.",
""
],
[
"Naeimipour",
"F.",
""
],
[
"Bazrafshan",
"A.",
""
],
[
"Abkar",
"M.",
""
]
] | In this paper, we construct the exact solutions of Reissner-Nordstrom black holes in the presence of quartic quasi-topological gravity. we obtain the thermodynamics and conserved quantities of the solutions and check the first law of thermodynamics. In studying the physical properties of the solutions, we consider asym... |
1804.05949 | Eric Ling | Gregory J. Galloway and Eric Ling | Existence of CMC Cauchy surfaces from a spacetime curvature condition | 7 pages; (v2) proof of Proposition 3 (and associated claims)
corrected, references and several comments added; (v3) to appear in GRG | null | 10.1007/s10714-018-2428-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note we present a result establishing the existence of a compact CMC
Cauchy surface from a curvature condition related to the strong energy
condition.
| [
{
"created": "Mon, 16 Apr 2018 21:37:52 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2018 03:11:54 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Aug 2018 21:44:53 GMT",
"version": "v3"
}
] | 2018-08-22 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Ling",
"Eric",
""
]
] | In this note we present a result establishing the existence of a compact CMC Cauchy surface from a curvature condition related to the strong energy condition. |
gr-qc/0609123 | Achim Kempf | Achim Kempf, Larissa Lorenz | Exact solution of inflationary model with minimum length | 19 pages, LaTeX | Phys.Rev.D74:103517,2006 | 10.1103/PhysRevD.74.103517 | null | gr-qc | null | Within the inflationary scenario, Planck scale physics should have affected
the comoving modes' initial conditions and early evolution, thereby potentially
affecting the inflationary predictions for the cosmic microwave background
(CMB). This issue has been studied extensively on the basis of various models
for how q... | [
{
"created": "Wed, 27 Sep 2006 06:50:13 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kempf",
"Achim",
""
],
[
"Lorenz",
"Larissa",
""
]
] | Within the inflationary scenario, Planck scale physics should have affected the comoving modes' initial conditions and early evolution, thereby potentially affecting the inflationary predictions for the cosmic microwave background (CMB). This issue has been studied extensively on the basis of various models for how qua... |
1506.04081 | Moritz Reintjes | Moritz Reintjes and Blake Temple | No Regularity Singularities Exist at Points of General Relativistic
Shock Wave Interaction between Shocks from Different Characteristic Families | 21 pages. In this paper we summarise the results and proofs in
arXiv:1409.5060. The result here corrects the wrong conclusion in
arXiv:1105.0798 and arXiv:1112.1803 | Proc. R. Soc. A 471 : 20140834, 2015 | 10.1098/rspa.2014.0834 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a constructive proof that coordinate transformations exist which
raise the regularity of the gravitational metric tensor from $C^{0,1}$ to
$C^{1,1}$ in a neighborhood of points of shock wave collision in General
Relativity. The proof applies to collisions between shock waves coming from
different characterist... | [
{
"created": "Fri, 12 Jun 2015 17:39:46 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Reintjes",
"Moritz",
""
],
[
"Temple",
"Blake",
""
]
] | We give a constructive proof that coordinate transformations exist which raise the regularity of the gravitational metric tensor from $C^{0,1}$ to $C^{1,1}$ in a neighborhood of points of shock wave collision in General Relativity. The proof applies to collisions between shock waves coming from different characteristic... |
gr-qc/0610152 | Alexander Alexandrov | A. N. Alexandrov, I. B. Vavilova, V. I. Zhdanov | Non-metric Generalizations of Relativistic Gravitational Theory and
Observational Data Interpretation | Reported at 35th COSPAR Scientific Assembly, H0.1-1 "Tests of General
Relativity" (Paris, France, 2004) | null | null | null | gr-qc | null | We discuss theoretical formalisms concerning with experimental verification
of General Relativity (GR). Non-metric generalizations of GR are considered and
a system of postulates is formulated for metric-affine and Finsler
gravitational theories. We consider local observer reference frames to be a
proper tool for com... | [
{
"created": "Mon, 30 Oct 2006 19:39:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Alexandrov",
"A. N.",
""
],
[
"Vavilova",
"I. B.",
""
],
[
"Zhdanov",
"V. I.",
""
]
] | We discuss theoretical formalisms concerning with experimental verification of General Relativity (GR). Non-metric generalizations of GR are considered and a system of postulates is formulated for metric-affine and Finsler gravitational theories. We consider local observer reference frames to be a proper tool for compa... |
1108.4731 | Karim Thebault Mr. | Karim P. Y. Thebault | Quantisation, Representation and Reduction; How Should We Interpret the
Quantum Hamiltonian Constraints of Canonical Gravity? | 18 Pages | Symmetry 2011, 3, 134-154 | 10.3390/sym3020134 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hamiltonian constraints feature in the canonical formulation of general
relativity. Unlike typical constraints they cannot be associated with a
reduction procedure leading to a non-trivial reduced phase space and this means
the physical interpretation of their quantum analogues is ambiguous. In
particular, can we ass... | [
{
"created": "Wed, 24 Aug 2011 01:19:37 GMT",
"version": "v1"
}
] | 2011-08-25 | [
[
"Thebault",
"Karim P. Y.",
""
]
] | Hamiltonian constraints feature in the canonical formulation of general relativity. Unlike typical constraints they cannot be associated with a reduction procedure leading to a non-trivial reduced phase space and this means the physical interpretation of their quantum analogues is ambiguous. In particular, can we assum... |
gr-qc/9311012 | null | Daniel Kennefick and Niall \'O Murchadha | Weakly decaying asymptotically flat static and stationary solutions to
the Einstein equations | 14 pages, plain Tex | Class.Quant.Grav.12:149-158,1995 | 10.1088/0264-9381/12/1/013 | null | gr-qc | null | The assumption that a solution to the Einstein equations is static (or
stationary) very strongly constrains the asymptotic behaviour of the metric. It
is shown that one need only impose very weak differentiability and decay
conditions {\it a priori} on the metric for the field equations to force the
metric to be anal... | [
{
"created": "Mon, 8 Nov 1993 12:17:57 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Kennefick",
"Daniel",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | The assumption that a solution to the Einstein equations is static (or stationary) very strongly constrains the asymptotic behaviour of the metric. It is shown that one need only impose very weak differentiability and decay conditions {\it a priori} on the metric for the field equations to force the metric to be analyt... |
1805.07080 | Donato Bini | Donato Bini, Carmen Chicone, Bahram Mashhoon, Kjell Rosquist | Spinning Particles in Twisted Gravitational Wave Spacetimes | 27 pages, RevTex macros, v2: typos corrected, reference added, v3:
slightly expanded version, v4: new Appendix A, references added; v5:
reference added, matches published version; v6: typos corrected in the
sentence following Eq. (C7) | Phys. Rev. D 98, 024043 (2018) | 10.1103/PhysRevD.98.024043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Twisted gravitational waves (TGWs) are nonplanar waves with twisted rays that
move along a fixed direction in space. We study further the physical
characteristics of a recent class of Ricci-flat solutions of general relativity
representing TGWs with wave fronts that have negative Gaussian curvature. In
particular, we... | [
{
"created": "Fri, 18 May 2018 07:42:01 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2018 09:21:43 GMT",
"version": "v2"
},
{
"created": "Sun, 3 Jun 2018 16:00:26 GMT",
"version": "v3"
},
{
"created": "Fri, 6 Jul 2018 07:04:48 GMT",
"version": "v4"
},
{
"cre... | 2021-01-19 | [
[
"Bini",
"Donato",
""
],
[
"Chicone",
"Carmen",
""
],
[
"Mashhoon",
"Bahram",
""
],
[
"Rosquist",
"Kjell",
""
]
] | Twisted gravitational waves (TGWs) are nonplanar waves with twisted rays that move along a fixed direction in space. We study further the physical characteristics of a recent class of Ricci-flat solutions of general relativity representing TGWs with wave fronts that have negative Gaussian curvature. In particular, we i... |
1711.02670 | Friedrich Sch\"oller | Friedrich Sch\"oller | Distinct Minkowski Spaces from BMS Supertranslations | 4 pages, 1 figure, matches published version | Phys. Rev. D 97, 046009 (2018) | 10.1103/PhysRevD.97.046009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work provides a smooth and everywhere well-defined extension of
Bondi-Metzner-Sachs (BMS) supertranslations into the bulk of Minkowski space.
The supertranslations lead to physically distinct spacetimes, all isometric to
Minkowski space. This construction is in contrast to the often used, non-smooth
BMS transfor... | [
{
"created": "Tue, 7 Nov 2017 19:00:01 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Feb 2018 16:12:47 GMT",
"version": "v2"
}
] | 2018-02-20 | [
[
"Schöller",
"Friedrich",
""
]
] | This work provides a smooth and everywhere well-defined extension of Bondi-Metzner-Sachs (BMS) supertranslations into the bulk of Minkowski space. The supertranslations lead to physically distinct spacetimes, all isometric to Minkowski space. This construction is in contrast to the often used, non-smooth BMS transforma... |
1812.04383 | Joan Josep Ferrando | Bartolom\'e Coll, Joan Josep Ferrando and Juan Antonio S\'aez | On the relativistic compressibility conditions | 21 pages, no figures, submitted to General Relativity and Gravitation | Phys. Rev. D 101, 064058 (2020) | 10.1103/PhysRevD.101.064058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The constraints imposed by the relativistic compressibility hypothesis on the
square of the speed of sound in a medium are obtained. This result allows to
obtain purely hydrodynamic conditions for the physical reality of a perfect
energy tensor representing the energetic evolution of a perfect fluid in local
thermal ... | [
{
"created": "Tue, 11 Dec 2018 13:21:11 GMT",
"version": "v1"
}
] | 2020-04-01 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | The constraints imposed by the relativistic compressibility hypothesis on the square of the speed of sound in a medium are obtained. This result allows to obtain purely hydrodynamic conditions for the physical reality of a perfect energy tensor representing the energetic evolution of a perfect fluid in local thermal eq... |
1012.3353 | William Nelson | William Nelson | Restricting Fourth Order Gravity via Cosmology | To appear in PRD | Phys.Rev.D82:124044,2010 | 10.1103/PhysRevD.82.124044 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmology of general fourth order corrections to Einstein gravity is
considered, both for a homogeneous and isotropic background and for general
tensor perturbations. It is explicitly shown how the standard cosmological
history can be (approximately) reproduced and under what condition the
evolution of the tensor... | [
{
"created": "Wed, 15 Dec 2010 15:03:45 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Dec 2010 16:47:16 GMT",
"version": "v2"
}
] | 2011-03-07 | [
[
"Nelson",
"William",
""
]
] | The cosmology of general fourth order corrections to Einstein gravity is considered, both for a homogeneous and isotropic background and for general tensor perturbations. It is explicitly shown how the standard cosmological history can be (approximately) reproduced and under what condition the evolution of the tensor m... |
1407.5440 | Oleg Zaslavskii | O. B. Zaslavskii | Kinematics of ultra-high energy particle collisions near black holes in
the magnetic field | 8 pages. Final version | Mod. Phys. Lett. A 30, 1550027 (2015) | 10.1142/S0217732315500273 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are different versions of collisions of two particles near black holes
with unbound energy $E_{c.m.}$ in the centre of mass frame. The so-called BSW
effect arises when a slow fine-tuned "critical" particle hits a rapid "usual"
one. We discuss a scenario of collision in the strong magnetic field for which
explan... | [
{
"created": "Mon, 21 Jul 2014 09:51:44 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Nov 2014 16:34:57 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Feb 2015 22:41:26 GMT",
"version": "v3"
}
] | 2015-02-20 | [
[
"Zaslavskii",
"O. B.",
""
]
] | There are different versions of collisions of two particles near black holes with unbound energy $E_{c.m.}$ in the centre of mass frame. The so-called BSW effect arises when a slow fine-tuned "critical" particle hits a rapid "usual" one. We discuss a scenario of collision in the strong magnetic field for which explanat... |
1406.6157 | Mariam Bouhmadi-Lopez | Mariam Bouhmadi-Lopez, Che-Yu Chen, Pisin Chen | Eddington-Born-Infeld cosmology: a cosmographic approach, a tale of
doomsdays and the fate of bound structures | 23 pages, 6 figures. RevTex4-1. Revised/clarified version accepted in
EPJC | null | 10.1140/epjc/s10052-015-3257-4 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Eddington-inspired-Born-Infeld scenario (EiBI) can prevent the Big Bang
singularity for a matter content whose equation of state is constant and
positive. In a recent paper we showed that, on the contrary, it is impossible
to smooth a big rip in the EiBI setup. In fact the situations are still
different for other... | [
{
"created": "Tue, 24 Jun 2014 07:40:29 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Dec 2014 21:40:08 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | The Eddington-inspired-Born-Infeld scenario (EiBI) can prevent the Big Bang singularity for a matter content whose equation of state is constant and positive. In a recent paper we showed that, on the contrary, it is impossible to smooth a big rip in the EiBI setup. In fact the situations are still different for other s... |
1707.07864 | Oleg Zaslavskii | O. B. Zaslavskii | On white holes as particle accelerators | 10 pages. 2 figures. Presentation improved, Ref. 11 added. To appear
in Grav. Cosmol | Gravitation and Cosmology, vol. 24, 92 (2018) | 10.1134/S0202289318010164 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze scenarios of particle collisions in the metric of a nonextremal
black hole that can potentially lead to ultrahigh energy $E_{c.m.}$ in their
centre of mass frame. Particle 1 comes from infinity to the black hole horizon
while particle 2 emerges from a white hole region. It is shown that unbounded
$E_{c.m.}... | [
{
"created": "Tue, 25 Jul 2017 09:16:18 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2017 21:24:53 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Jan 2018 17:58:45 GMT",
"version": "v3"
}
] | 2018-04-04 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We analyze scenarios of particle collisions in the metric of a nonextremal black hole that can potentially lead to ultrahigh energy $E_{c.m.}$ in their centre of mass frame. Particle 1 comes from infinity to the black hole horizon while particle 2 emerges from a white hole region. It is shown that unbounded $E_{c.m.}$ ... |
2202.13113 | Filip Hejda | Filip Hejda, Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Notes on extraction of energy from an extremal Kerr-Newman black hole
via charged particle collisions | 7 pages | Acta Phys. Pol. B Proc. Suppl. 15, 1-A5 (2022) | 10.5506/APhysPolBSupp.15.1-A5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The so-called BSW effect is an idealised scenario for high-energy test
particle collisions in the vicinity of black holes; if the black hole is
extremal and one of the particles fine-tuned, the centre-of-mass collision
energy can be arbitrarily high. It has been recently shown that the energy of
escaping particles pr... | [
{
"created": "Sat, 26 Feb 2022 11:02:58 GMT",
"version": "v1"
}
] | 2022-03-02 | [
[
"Hejda",
"Filip",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | The so-called BSW effect is an idealised scenario for high-energy test particle collisions in the vicinity of black holes; if the black hole is extremal and one of the particles fine-tuned, the centre-of-mass collision energy can be arbitrarily high. It has been recently shown that the energy of escaping particles prod... |
2012.12752 | Mario Pitschmann | Mario Pitschmann | Exact Solutions to Non-Linear Symmetron Theory II: One and Two Mirror
Systems | 12 pages, 4 figures | Phys. Rev. D 103, 084013 (2021) | 10.1103/PhysRevD.103.084013 | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | We derive the exact analytical solutions to the symmetron field theory
equations in the presence of a one or two mirror system in the case of a
spontaneously broken phase in vacuum as well as in matter. This complements a
similar analysis performed in a previous article [1], in which the symmetron is
in the spontaneo... | [
{
"created": "Wed, 23 Dec 2020 15:45:47 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Pitschmann",
"Mario",
""
]
] | We derive the exact analytical solutions to the symmetron field theory equations in the presence of a one or two mirror system in the case of a spontaneously broken phase in vacuum as well as in matter. This complements a similar analysis performed in a previous article [1], in which the symmetron is in the spontaneous... |
1905.13498 | Astrid Eichhorn | Astrid Eichhorn, Sumati Surya and Fleur Versteegen | Spectral dimension on spatial hypersurfaces in causal set quantum
gravity | 13 pages, 11 figures | null | 10.1088/1361-6382/ab47cd | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An important probe of quantum geometry is its spectral dimension, defined via
a spatial diffusion process. In this work we study the spectral dimension of a
``spatial hypersurface'' in a manifoldlike causal set using the induced spatial
distance function. In previous work, the diffusion was taken on the full causal
s... | [
{
"created": "Fri, 31 May 2019 10:28:01 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Surya",
"Sumati",
""
],
[
"Versteegen",
"Fleur",
""
]
] | An important probe of quantum geometry is its spectral dimension, defined via a spatial diffusion process. In this work we study the spectral dimension of a ``spatial hypersurface'' in a manifoldlike causal set using the induced spatial distance function. In previous work, the diffusion was taken on the full causal set... |
1511.07071 | Emil Nissimov | Eduardo Guendelman, Emil Nissimov and Svetlana Pacheva | Unified Dark Energy and Dust Dark Matter Dual to Quadratic Purely
Kinetic K-Essence | 11 pages two-column style; v.2 few explanatory paragraphs and
references added, 12 pages, to appear in "European Physical Journal C" | European Physical Journal C76:90 (2016) | 10.1140/epjc/s10052-016-3938-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a modified gravity plus single-scalar-field model, where the
scalar Lagrangian couples symmetrically both to the standard Riemannian
volume-form (spacetime integration measure density) given by the square-root of
the determinant of the Riemannian metric, as well as to another non-Riemannian
volume-form in... | [
{
"created": "Sun, 22 Nov 2015 21:24:42 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2016 11:11:07 GMT",
"version": "v2"
}
] | 2016-03-21 | [
[
"Guendelman",
"Eduardo",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Pacheva",
"Svetlana",
""
]
] | We consider a modified gravity plus single-scalar-field model, where the scalar Lagrangian couples symmetrically both to the standard Riemannian volume-form (spacetime integration measure density) given by the square-root of the determinant of the Riemannian metric, as well as to another non-Riemannian volume-form in t... |
2304.03559 | Jakub Mielczarek Ph.D. | Grzegorz Czelusta, Jakub Mielczarek | Quantum circuits for the Ising spin networks | 16 pages, 33 figures | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin network states are a powerful tool for constructing the $SU(2)$ gauge
theories on a graph. In loop quantum gravity (LQG), they have yielded many
promising predictions, although progress has been limited by the computational
challenge of dealing with high-dimensional Hilbert spaces. To explore more
general config... | [
{
"created": "Fri, 7 Apr 2023 09:42:29 GMT",
"version": "v1"
}
] | 2023-04-10 | [
[
"Czelusta",
"Grzegorz",
""
],
[
"Mielczarek",
"Jakub",
""
]
] | Spin network states are a powerful tool for constructing the $SU(2)$ gauge theories on a graph. In loop quantum gravity (LQG), they have yielded many promising predictions, although progress has been limited by the computational challenge of dealing with high-dimensional Hilbert spaces. To explore more general configur... |
1010.2963 | Maciej Dunajski | Maciej Dunajski, Prim Plansangkate | Scalar--flat K\"ahler metrics with conformal Bianchi V symmetry | Dedicated to Maciej Przanowski on the occasion of his 65th birthday.
Minor corrections. To appear in CQG | Class.Quant.Grav.28:125004,2011 | 10.1088/0264-9381/28/12/125004 | DAMTP-2010-79 | gr-qc hep-th math.DG nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an affirmative answer to a question posed by Tod \cite{Tod:1995b},
and construct all four-dimensional Kahler metrics with vanishing scalar
curvature which are invariant under the conformal action of Bianchi V group.
The construction is based on the combination of twistor theory and the
isomonodromic proble... | [
{
"created": "Thu, 14 Oct 2010 16:11:39 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Apr 2011 12:48:43 GMT",
"version": "v2"
}
] | 2011-05-09 | [
[
"Dunajski",
"Maciej",
""
],
[
"Plansangkate",
"Prim",
""
]
] | We provide an affirmative answer to a question posed by Tod \cite{Tod:1995b}, and construct all four-dimensional Kahler metrics with vanishing scalar curvature which are invariant under the conformal action of Bianchi V group. The construction is based on the combination of twistor theory and the isomonodromic problem ... |
1002.3245 | Sanjay Jhingan | S. Jhingan and Sushant G. Ghosh | Inhomogeneous Dust Collapse in 5D Einstein-Gauss-Bonnet Gravity | 8 Latex Pages, 2 EPS figures | Physical Review D 81, 024010 (2010) | 10.1103/PhysRevD.81.024010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a Lemaitre - Tolman - Bondi type space-time in Einstein gravity
with the Gauss-Bonnet combination of quadratic curvature terms, and present
exact solution in closed form. It turns out that the presence of the coupling
constant of the Gauss-Bonnet terms alpha > 0 completely changes the causal
structure of ... | [
{
"created": "Wed, 17 Feb 2010 11:49:27 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Jhingan",
"S.",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | We consider a Lemaitre - Tolman - Bondi type space-time in Einstein gravity with the Gauss-Bonnet combination of quadratic curvature terms, and present exact solution in closed form. It turns out that the presence of the coupling constant of the Gauss-Bonnet terms alpha > 0 completely changes the causal structure of th... |
2203.09232 | Ilya Lvovich Shapiro | E.V. Gorbar and Ilya L. Shapiro | Nonlocality of quantum matter corrections and cosmological constant
running | Explanations extended, results unchanged, fits the published version.
15 pages, 1 figure | null | 10.1007/JHEP07(2022)103 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Semiclassical contributions to the gravitational action include various terms
with zero, two, and four derivatives of the metric as well as nonlocal form
factors for these terms. Contributions to some of these terms could be confused
with others on a specific metric background or for a particular gauge fixing.
We pre... | [
{
"created": "Thu, 17 Mar 2022 10:40:20 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Aug 2022 13:47:30 GMT",
"version": "v2"
}
] | 2022-08-10 | [
[
"Gorbar",
"E. V.",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | Semiclassical contributions to the gravitational action include various terms with zero, two, and four derivatives of the metric as well as nonlocal form factors for these terms. Contributions to some of these terms could be confused with others on a specific metric background or for a particular gauge fixing. We prese... |
2301.04879 | Roberto Oliveri | Filippo Camilloni, Gianluca Grignani, Troels Harmark, Roberto Oliveri,
Marta Orselli, Daniele Pica | Tidal deformations of a binary system induced by an external Kerr black
hole | v1: 27 pages, 3 figures; v2: minor changes, matches published version
in Phys. Rev. D | Phys. Rev. D 107 (2023) 8, 084011 | 10.1103/PhysRevD.107.084011 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of a binary system moving in the background of a black hole is
affected by tidal forces. In this work, for the Kerr black hole, we derive the
electric and magnetic tidal moments at quadrupole order, where the latter are
computed for the first time in full generality. We make use of these moments in
the s... | [
{
"created": "Thu, 12 Jan 2023 08:55:27 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Apr 2023 09:35:48 GMT",
"version": "v2"
}
] | 2023-04-10 | [
[
"Camilloni",
"Filippo",
""
],
[
"Grignani",
"Gianluca",
""
],
[
"Harmark",
"Troels",
""
],
[
"Oliveri",
"Roberto",
""
],
[
"Orselli",
"Marta",
""
],
[
"Pica",
"Daniele",
""
]
] | The dynamics of a binary system moving in the background of a black hole is affected by tidal forces. In this work, for the Kerr black hole, we derive the electric and magnetic tidal moments at quadrupole order, where the latter are computed for the first time in full generality. We make use of these moments in the sce... |
2102.03535 | Farrukh A. Chishtie | Farrukh A. Chishtie | On the breakdown of space-time in general relativity | 9 pages, LaTeX, accepted at Canadian Journal of Physics | null | 10.1139/cjp-2022-0159 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the canonical quantization of $d>2$ dimensional general relativity
(GR) via the Dirac constraint formalism (also termed as `constraint
quantization'), we propose the loss of covariance as a fundamental property of
the theory. This breakdown occurs for the first-order Einstein Hilbert action,
whereby loss of ... | [
{
"created": "Sat, 6 Feb 2021 08:35:00 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jan 2022 01:46:19 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Jun 2022 01:50:21 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Dec 2022 22:11:01 GMT",
"version": "v4"
},
{
"cre... | 2023-03-28 | [
[
"Chishtie",
"Farrukh A.",
""
]
] | Based on the canonical quantization of $d>2$ dimensional general relativity (GR) via the Dirac constraint formalism (also termed as `constraint quantization'), we propose the loss of covariance as a fundamental property of the theory. This breakdown occurs for the first-order Einstein Hilbert action, whereby loss of di... |
1107.1689 | Burkhard Zink | Burkhard Zink, Paul D. Lasky, Kostas D. Kokkotas | Are gravitational waves from giant magnetar flares observable? | 4 pages, 3 figures. Further information can be found at
http://www.physik.uni-tuebingen.de/institute/astronomie-astrophysik/institut/theoretische-astrophysik/forschung.html | Phys. Rev. D 85, 024030 (2012) | 10.1103/PhysRevD.85.024030 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Are giant flares in magnetars viable sources of gravitational radiation? Few
theoretical studies have been concerned with this problem, with the small
number using either highly idealized models or assuming a magnetic field orders
of magnitude beyond what is supported by observations. We perform nonlinear
general-rel... | [
{
"created": "Fri, 8 Jul 2011 18:11:45 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2011 18:04:04 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jul 2011 14:39:17 GMT",
"version": "v3"
}
] | 2013-05-30 | [
[
"Zink",
"Burkhard",
""
],
[
"Lasky",
"Paul D.",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | Are giant flares in magnetars viable sources of gravitational radiation? Few theoretical studies have been concerned with this problem, with the small number using either highly idealized models or assuming a magnetic field orders of magnitude beyond what is supported by observations. We perform nonlinear general-relat... |
1408.0766 | Reinaldo Gleiser | Reinaldo J. Gleiser | Axial gravitational perturbations of an infinite static line source | 17 pages, 2 figures | null | 10.1088/0264-9381/32/6/065003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study axial gravitational perturbations of an infinite
static line source, represented by a form of the Levi-Civita metric. The
perturbations are restricted to axial symmetry but break the cylindrical
symmetry of the background metric. We analyze the gauge issues that arise in
setting up the appropri... | [
{
"created": "Mon, 4 Aug 2014 18:58:44 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Gleiser",
"Reinaldo J.",
""
]
] | In this paper we study axial gravitational perturbations of an infinite static line source, represented by a form of the Levi-Civita metric. The perturbations are restricted to axial symmetry but break the cylindrical symmetry of the background metric. We analyze the gauge issues that arise in setting up the appropriat... |
1610.02390 | Moritz Reintjes | Moritz Reintjes and Blake Temple | Shock Wave Interactions and the Riemann-flat Condition: The Geometry
behind Metric Smoothing and the Existence of Locally Inertial Frames in
General Relativity | V5: Improved presentation, in particular, to Section 6. Results
unchanged. V4: We shortened the presentation, added Def 3.1 and removed last
section of previous version. V3: We extended results from connections of
bounded variation to connections bounded in $L^\infty$, otherwise main
results remain identical. V... | Arch. Rat. Mech. Anal. 235 (2020), 1873-1904 | 10.1007/s00205-019-01456-8 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that the essential smoothness of the gravitational metric at shock
waves in GR, a PDE regularity issue for weak solutions of the Einstein
equations, is determined by a geometrical condition which we introduce and name
the {\it Riemann-flat condition}. The Riemann-flat condition determines whether
or not the ... | [
{
"created": "Fri, 7 Oct 2016 19:49:10 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2017 14:53:25 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Apr 2017 08:00:44 GMT",
"version": "v3"
},
{
"created": "Wed, 22 Aug 2018 09:56:10 GMT",
"version": "v4"
},
{
"cr... | 2020-11-10 | [
[
"Reintjes",
"Moritz",
""
],
[
"Temple",
"Blake",
""
]
] | We prove that the essential smoothness of the gravitational metric at shock waves in GR, a PDE regularity issue for weak solutions of the Einstein equations, is determined by a geometrical condition which we introduce and name the {\it Riemann-flat condition}. The Riemann-flat condition determines whether or not the es... |
1903.05725 | Valery Nikulin V | Valery V. Nikulin, Sergey G. Rubin | Inflationary limits on the size of compact extra space | 13 pages, 3 figures, accepted by IJMPD | International Journal of Modern Physics D Vol. 28, No. 13 (2019)
1941004 | 10.1142/S0218271819410049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study restrictions imposed on the parameters of the Kaluza-Klein extra
space supplied by the standard inflationary models. It is shown that the size
of the extra space cannot be larger than $\sim 10^{-27}$cm and the
$D$-dimensional Planck mass should be larger than $\sim 10^{13}$GeV. The
validity of these estimate... | [
{
"created": "Wed, 13 Mar 2019 21:34:36 GMT",
"version": "v1"
}
] | 2019-12-02 | [
[
"Nikulin",
"Valery V.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We study restrictions imposed on the parameters of the Kaluza-Klein extra space supplied by the standard inflationary models. It is shown that the size of the extra space cannot be larger than $\sim 10^{-27}$cm and the $D$-dimensional Planck mass should be larger than $\sim 10^{13}$GeV. The validity of these estimates ... |
1208.3168 | Frans Klinkhamer | F. R. Klinkhamer | Gravity Without Curved Spacetime: A Simple Calculation | 9 pages, v3: expanded version | null | null | KA-TP-34-2012 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical-particle trajectories are calculated for the static Einstein
universe without requiring that the 3-space be closed and curved. Freely-moving
test particles are found to return to their starting positions because of
strong gravitational-field effects. Possible implications for the underlying
(quantum) theory... | [
{
"created": "Wed, 15 Aug 2012 18:07:24 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Aug 2012 15:39:53 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Sep 2012 14:48:07 GMT",
"version": "v3"
}
] | 2012-09-07 | [
[
"Klinkhamer",
"F. R.",
""
]
] | Classical-particle trajectories are calculated for the static Einstein universe without requiring that the 3-space be closed and curved. Freely-moving test particles are found to return to their starting positions because of strong gravitational-field effects. Possible implications for the underlying (quantum) theory o... |
1708.06244 | Emilio Elizalde | I. Brevik, E. Elizalde, S.D. Odintsov, A.V. Timoshkin | Inflationary universe in terms of a van der Waals viscous fluid | 7 pages, no figures, to appear in IJGMMP | null | 10.1142/S0219887817501857 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inflationary expansion of our early-time universe is considered in terms
of the van der Waals equation, as equation of state for the cosmic fluid, where
a bulk viscosity contribution is assumed to be present. The corresponding
gravitational equations for the energy density in a homogeneous and isotropic
Friedmann... | [
{
"created": "Fri, 18 Aug 2017 02:11:59 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Brevik",
"I.",
""
],
[
"Elizalde",
"E.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | The inflationary expansion of our early-time universe is considered in terms of the van der Waals equation, as equation of state for the cosmic fluid, where a bulk viscosity contribution is assumed to be present. The corresponding gravitational equations for the energy density in a homogeneous and isotropic Friedmann-L... |
0905.2391 | Samuel E. Gralla | Samuel E. Gralla, Abraham I. Harte, and Robert M. Wald | A Rigorous Derivation of Electromagnetic Self-force | 52 pages, minor corrections | Phys.Rev.D80:024031,2009 | 10.1103/PhysRevD.80.024031 | null | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | During the past century, there has been considerable discussion and analysis
of the motion of a point charge, taking into account "self-force" effects due
to the particle's own electromagnetic field. We analyze the issue of "particle
motion" in classical electromagnetism in a rigorous and systematic way by
considerin... | [
{
"created": "Thu, 14 May 2009 18:21:02 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2009 16:23:26 GMT",
"version": "v2"
}
] | 2009-08-12 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Harte",
"Abraham I.",
""
],
[
"Wald",
"Robert M.",
""
]
] | During the past century, there has been considerable discussion and analysis of the motion of a point charge, taking into account "self-force" effects due to the particle's own electromagnetic field. We analyze the issue of "particle motion" in classical electromagnetism in a rigorous and systematic way by considering ... |
2311.04620 | Remo Garattini | Remo Garattini and Phongpichit Channuie | Traversable Wormholes supported by Holographic Dark Energy with a
modified Equation of State | RevTeX 4, 13 pages | Nucl. Phys. B 1005 (2024) 116589 | 10.1016/j.nuclphysb.2024.116589 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspired by holographic dark energy models, we consider different energy
density profiles as possible sources needed to have traversable wormholes
solutions. Since such energy densities are all positive, we are forced to
introduce an equation of state of the form $p_{r}% (r)=\omega_{r}\left(
r\right) \rho(r)$. We wil... | [
{
"created": "Wed, 8 Nov 2023 11:41:49 GMT",
"version": "v1"
}
] | 2024-06-12 | [
[
"Garattini",
"Remo",
""
],
[
"Channuie",
"Phongpichit",
""
]
] | Inspired by holographic dark energy models, we consider different energy density profiles as possible sources needed to have traversable wormholes solutions. Since such energy densities are all positive, we are forced to introduce an equation of state of the form $p_{r}% (r)=\omega_{r}\left( r\right) \rho(r)$. We will ... |
2103.11090 | Cosimo Bambi | Bakhtiyor Narzilloev, Javlon Rayimbaev, Ahmadjon Abdujabbarov,
Bobomurat Ahmedov, Cosimo Bambi | Dynamics of charged particles and magnetic dipoles around magnetized
quasi-Schwarzschild black holes | 14 pages, 11 figures. Accepted for publication in EPJC | Eur. Phys. J. C (2021) 81:269 | 10.1140/epjc/s10052-021-09074-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we have investigated the motion of charged particles
together with magnetic dipoles to determine how well the spacetime deviation
parameter $\epsilon$ and external uniform magnetic field can mimic the spin of
a rotating Kerr black hole. Investigation of charged particle motion has shown
that the... | [
{
"created": "Sat, 20 Mar 2021 04:22:49 GMT",
"version": "v1"
}
] | 2021-04-06 | [
[
"Narzilloev",
"Bakhtiyor",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Bambi",
"Cosimo",
""
]
] | In the present paper, we have investigated the motion of charged particles together with magnetic dipoles to determine how well the spacetime deviation parameter $\epsilon$ and external uniform magnetic field can mimic the spin of a rotating Kerr black hole. Investigation of charged particle motion has shown that the d... |
gr-qc/0310009 | Matt Visser | A J M Medved, Damien Martin, and Matt Visser | Dirty black holes: Quasinormal modes | 15 pages; uses iopart.cls setstack.sty; V2: one additional reference
added, no physics changes; V3: two extra references, minor changes in
response to referee comments | Class.Quant.Grav. 21 (2004) 1393-1406 | 10.1088/0264-9381/21/6/008 | null | gr-qc | null | In this paper, we investigate the asymptotic nature of the quasinormal modes
for "dirty" black holes -- generic static and spherically symmetric spacetimes
for which a central black hole is surrounded by arbitrary "matter" fields. We
demonstrate that, to the leading asymptotic order, the [imaginary] spacing
between m... | [
{
"created": "Thu, 2 Oct 2003 06:06:10 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Oct 2003 19:53:35 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Dec 2003 05:55:30 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Medved",
"A J M",
""
],
[
"Martin",
"Damien",
""
],
[
"Visser",
"Matt",
""
]
] | In this paper, we investigate the asymptotic nature of the quasinormal modes for "dirty" black holes -- generic static and spherically symmetric spacetimes for which a central black hole is surrounded by arbitrary "matter" fields. We demonstrate that, to the leading asymptotic order, the [imaginary] spacing between mod... |
2206.01337 | Maximiliano Ujevic | Henrique Gieg, Federico Schianchi, Tim Dietrich, Maximiliano Ujevic | Incorporating a radiative hydrodynamics scheme in the
numerical-relativity code BAM | 28 pages, 14 figures | Universe 2022, 8(7), 370 | 10.3390/universe8070370 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To study binary neutron star systems and to interpret observational data such
as gravitational-wave and kilonova signals, one needs an accurate description
of the processes that take place during the final stages of the coalescence,
e.g., through numerical-relativity simulations. In this work, we present an
updated v... | [
{
"created": "Thu, 2 Jun 2022 23:36:31 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jul 2022 22:44:25 GMT",
"version": "v2"
}
] | 2022-07-12 | [
[
"Gieg",
"Henrique",
""
],
[
"Schianchi",
"Federico",
""
],
[
"Dietrich",
"Tim",
""
],
[
"Ujevic",
"Maximiliano",
""
]
] | To study binary neutron star systems and to interpret observational data such as gravitational-wave and kilonova signals, one needs an accurate description of the processes that take place during the final stages of the coalescence, e.g., through numerical-relativity simulations. In this work, we present an updated ver... |
gr-qc/0109086 | Jerome Gariel | J. Gariel, G. Marcilhacy and N. O. Santos | Some Properties of a New Solution of the Ernst Equation | 17 pages, LaTeX, 10 EPS figures, uses graficx.sty | Class.Quant.Grav.19:2157-2170,2002 | 10.1088/0264-9381/19/8/307 | null | gr-qc | null | From a particularly simple solution of the Ernst equation, we build a
solution of the vacuum stationary axisymmetric Einstein equations depending on
three parameters. The parameters are associated to the total mass of the source
and its angular momentum. The third parameter produces a topological
deformation of the e... | [
{
"created": "Tue, 25 Sep 2001 16:42:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gariel",
"J.",
""
],
[
"Marcilhacy",
"G.",
""
],
[
"Santos",
"N. O.",
""
]
] | From a particularly simple solution of the Ernst equation, we build a solution of the vacuum stationary axisymmetric Einstein equations depending on three parameters. The parameters are associated to the total mass of the source and its angular momentum. The third parameter produces a topological deformation of the erg... |
1509.05679 | Jeremy Sakstein | Jeremy Sakstein, Sarunas Verner | Disformal Gravity Theories: A Jordan Frame Analysis | Updated to reflect published version, results unchanged. 15 pages, 9
figures, 4 tables | Phys. Rev. D 92, 123005 (2015) | 10.1103/PhysRevD.92.123005 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Jordan frame action for general disformal theories is presented and
studied for the first time, motivated by several unresolved mysteries that
arise when working in the Einstein frame. We present the Friedmann equations
and, specialising to exponential functions, study the late-time cosmology using
dynamical syst... | [
{
"created": "Thu, 17 Sep 2015 09:52:33 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2015 11:29:13 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Dec 2015 16:34:17 GMT",
"version": "v3"
}
] | 2015-12-23 | [
[
"Sakstein",
"Jeremy",
""
],
[
"Verner",
"Sarunas",
""
]
] | The Jordan frame action for general disformal theories is presented and studied for the first time, motivated by several unresolved mysteries that arise when working in the Einstein frame. We present the Friedmann equations and, specialising to exponential functions, study the late-time cosmology using dynamical system... |
1609.07465 | Andrew DeBenedictis | Andrew DeBenedictis, Sasa Ilijic | The Spherically Symmetric Vacuum in Covariant $F(T) = T +
\frac{\alpha}{2}T^{2} + \mathcal{O}(T^{\gamma})$ Gravity Theory | 13 pages, 4 figures. A Mathematica notebook which calculates the
various quantities required for f(T) gravity is available at
http://sail.zpf.fer.hr/tetradsFofT/ . In v3 some typographical errors have
been fixed in equations (19) and (20). We thank C. Pfeifer, S. Bahamonde, and
K. Flathmann for pointing this ou... | Phys. Rev. D 94, 124025 (2016) | 10.1103/PhysRevD.94.124025 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a fully covariant version of the theory of $F(T)$ torsion gravity
has been introduced (arXiv:1510.08432v2 [gr-qc]). In covariant $F(T)$ gravity
the Schwarzschild solution is not a vacuum solution for $F(T)\neq T$ and
therefore determining the spherically symmetric vacuum is an important open
problem. Within... | [
{
"created": "Fri, 23 Sep 2016 18:57:02 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Nov 2016 18:43:49 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Jul 2019 21:38:09 GMT",
"version": "v3"
}
] | 2019-08-02 | [
[
"DeBenedictis",
"Andrew",
""
],
[
"Ilijic",
"Sasa",
""
]
] | Recently, a fully covariant version of the theory of $F(T)$ torsion gravity has been introduced (arXiv:1510.08432v2 [gr-qc]). In covariant $F(T)$ gravity the Schwarzschild solution is not a vacuum solution for $F(T)\neq T$ and therefore determining the spherically symmetric vacuum is an important open problem. Within t... |
1610.08090 | Ritwick Banerjee | Ritwick Banerjee, Ritabrata Biswas | Thermodynamics of black holes in rainbow gravity | 24 pages, 21 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamic properties of black holes
under the influence of rainbow gravity. In the metric of Schwarzschild,
Reissner-Nordstrom and Reissner-Nordstrom-de-Sitter black hole surrounded by
quintessence, we consider a rainbow function and derive the existence of
remnant and critical m... | [
{
"created": "Sun, 23 Oct 2016 11:47:17 GMT",
"version": "v1"
}
] | 2016-10-27 | [
[
"Banerjee",
"Ritwick",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | In this paper, we investigate the thermodynamic properties of black holes under the influence of rainbow gravity. In the metric of Schwarzschild, Reissner-Nordstrom and Reissner-Nordstrom-de-Sitter black hole surrounded by quintessence, we consider a rainbow function and derive the existence of remnant and critical mas... |
gr-qc/0603121 | Mohammad Ansari | Mohammad H. Ansari | Generic degeneracy and entropy in loop quantum gravity | 6 pages, 5 figures, and 2 tables. Published in section: Field Theory
And Statistical Systems | Nucl.Phys.B795:635-644,2008 | 10.1016/j.nuclphysb.2007.11.038 | null | gr-qc hep-th | null | Without imposing the trapping boundary conditions and only from within the
very definition of area it is shown that the loop quantization of area
manifests an unexpected degeneracy in area eigenvalues. This could lead to a
deeper understanding of the microscopic description of a quantum black hole. If
a certain numbe... | [
{
"created": "Thu, 30 Mar 2006 04:59:49 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2006 17:50:11 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Dec 2006 00:36:44 GMT",
"version": "v3"
},
{
"created": "Thu, 29 Nov 2007 23:08:10 GMT",
"version": "v4"
},
{
"cre... | 2008-11-26 | [
[
"Ansari",
"Mohammad H.",
""
]
] | Without imposing the trapping boundary conditions and only from within the very definition of area it is shown that the loop quantization of area manifests an unexpected degeneracy in area eigenvalues. This could lead to a deeper understanding of the microscopic description of a quantum black hole. If a certain number ... |
1605.07038 | Adam Szereszewski | Jerzy Lewandowski, Adam Szereszewski, Piotr Waluk | Spacetimes foliated by non-expanding and Killing horizons: higher
dimension | 19 pages | Phys. Rev. D 94, 064018 (2016) | 10.1103/PhysRevD.94.064018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of non-expanding horizons (NEH) geometry and the theory of near
horizon geometries (NHG) are two mathematical relativity frameworks
generalizing the black hole theory. From the point of view of the NEHs theory,
a NHG is just a very special case of a spacetime containing an NEH of many
extra symmetries. It ... | [
{
"created": "Mon, 23 May 2016 14:44:33 GMT",
"version": "v1"
}
] | 2016-09-14 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Szereszewski",
"Adam",
""
],
[
"Waluk",
"Piotr",
""
]
] | The theory of non-expanding horizons (NEH) geometry and the theory of near horizon geometries (NHG) are two mathematical relativity frameworks generalizing the black hole theory. From the point of view of the NEHs theory, a NHG is just a very special case of a spacetime containing an NEH of many extra symmetries. It ca... |
2001.07728 | Jose Natario | Anne T. Franzen and Jos\'e Nat\'ario | Linear relativistic thermoelastic rod | 19 pages, no figures | J. Hyperbolic Differ. Equ. 17 (2020) 863-882 | 10.1142/S0219891620500289 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive and analyze the linearized hyperbolic equations describing a
relativistic heat-conducting elastic rod. We construct a decreasing energy
integral for these equations, compute the associated characteristic propagation
speeds, and prove that the solutions decay in time by using a Fourier
decomposition. For com... | [
{
"created": "Tue, 21 Jan 2020 19:00:10 GMT",
"version": "v1"
}
] | 2021-02-09 | [
[
"Franzen",
"Anne T.",
""
],
[
"Natário",
"José",
""
]
] | We derive and analyze the linearized hyperbolic equations describing a relativistic heat-conducting elastic rod. We construct a decreasing energy integral for these equations, compute the associated characteristic propagation speeds, and prove that the solutions decay in time by using a Fourier decomposition. For compa... |
gr-qc/9705075 | Mike Cassidy | M. J. Cassidy | Divergences in the Effective Action for Acausal Spacetimes | 17 pages, Latex | Class.Quant.Grav. 14 (1997) 3031-3040 | 10.1088/0264-9381/14/11/006 | DAMTP/R-97/24 | gr-qc | null | The 1--loop effective Lagrangian for a massive scalar field on an arbitrary
causality violating spacetime is calculated using the methods of Euclidean
quantum field theory in curved spacetime. Fields of spin 1/2, spin 1 and
twisted field configurations are also considered. In general, we find that the
Lagrangian dive... | [
{
"created": "Wed, 28 May 1997 11:00:00 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Cassidy",
"M. J.",
""
]
] | The 1--loop effective Lagrangian for a massive scalar field on an arbitrary causality violating spacetime is calculated using the methods of Euclidean quantum field theory in curved spacetime. Fields of spin 1/2, spin 1 and twisted field configurations are also considered. In general, we find that the Lagrangian diverg... |
1110.2965 | Michael Boyle | Michael Boyle, Robert Owen, and Harald P. Pfeiffer | A geometric approach to the precession of compact binaries | Minor clarifications and journal reference | Phys. Rev. D 84, 124011 (2011) | 10.1103/PhysRevD.84.124011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a geometrical method to define a preferred reference frame for
precessing binary systems and the gravitational waves they emit. This
minimal-rotation frame is aligned with the angular-momentum axis and fixes the
rotation about that axis up to a constant angle, resulting in an essentially
invariant frame. G... | [
{
"created": "Thu, 13 Oct 2011 14:43:43 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2011 15:48:09 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Feb 2012 15:21:14 GMT",
"version": "v3"
}
] | 2012-02-02 | [
[
"Boyle",
"Michael",
""
],
[
"Owen",
"Robert",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | We discuss a geometrical method to define a preferred reference frame for precessing binary systems and the gravitational waves they emit. This minimal-rotation frame is aligned with the angular-momentum axis and fixes the rotation about that axis up to a constant angle, resulting in an essentially invariant frame. Gra... |
1004.1798 | Lorenzo Iorio | Lorenzo Iorio | Solar system constraints on planetary Coriolis-type effects induced by
rotation of distant masses | LaTex2e, 22 pages, 4 tables, no figures. Part on the Oort cloud
restored. Reference updated. Accepted for publication in Journal of Cosmology
and Astroparticle Physics (JCAP) | JCAP 1008:030,2010 | 10.1088/1475-7516/2010/08/030 | null | gr-qc astro-ph.CO astro-ph.EP physics.gen-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We phenomenologically put local constraints on the rotation of distant masses
by using the planets of the solar system. First, we analytically compute the
orbital secular precessions induced on the motion of a test particle about a
massive primary by a Coriolis-like force, treated as a small perturbation of
first ord... | [
{
"created": "Sun, 11 Apr 2010 11:36:27 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2010 15:52:22 GMT",
"version": "v2"
},
{
"created": "Wed, 26 May 2010 13:54:12 GMT",
"version": "v3"
},
{
"created": "Fri, 6 Aug 2010 13:37:38 GMT",
"version": "v4"
}
] | 2011-03-28 | [
[
"Iorio",
"Lorenzo",
""
]
] | We phenomenologically put local constraints on the rotation of distant masses by using the planets of the solar system. First, we analytically compute the orbital secular precessions induced on the motion of a test particle about a massive primary by a Coriolis-like force, treated as a small perturbation of first order... |
gr-qc/0101113 | Giovanni Montani | G. Montani (ICRA - Phys. Dept. - University of Rome "La Sapienza") | Influence of the Particles Creation on the Flat and Negative Curved FLRW
Universes | 14 pages, no figures, appeared in Class. Quantum Grav., 18, 193, 2001 | Class.Quant.Grav. 18 (2001) 193-203 | 10.1088/0264-9381/18/1/311 | null | gr-qc | null | We present a dynamical analysis of the (classical) spatially flat and
negative curved Friedmann-Lameitre-Robertson-Walker (FLRW) universes evolving,
(by assumption) close to the thermodynamic equilibrium, in presence of a
particles creation process, described by means of a realiable phenomenological
approach, based o... | [
{
"created": "Mon, 29 Jan 2001 19:02:08 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Montani",
"G.",
"",
"ICRA - Phys. Dept. - University of Rome \"La Sapienza\""
]
] | We present a dynamical analysis of the (classical) spatially flat and negative curved Friedmann-Lameitre-Robertson-Walker (FLRW) universes evolving, (by assumption) close to the thermodynamic equilibrium, in presence of a particles creation process, described by means of a realiable phenomenological approach, based on ... |
1905.10509 | Oleg Tsupko | Oleg Yu. Tsupko, Zuhui Fan, and Gennady S. Bisnovatyi-Kogan | Black hole shadow as a standard ruler in cosmology | null | Classical and Quantum Gravity, 37, 065016 (2020) | 10.1088/1361-6382/ab6f7d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Advancements in the black hole shadow observations may allow us not only to
investigate physics in the strong gravity regime, but also to use them in
cosmological studies. In this paper, we propose to use the shadow of
supermassive black holes as a standard ruler for cosmological applications
assuming the black hole ... | [
{
"created": "Sat, 25 May 2019 03:31:38 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2019 09:49:11 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Feb 2020 15:40:09 GMT",
"version": "v3"
}
] | 2020-02-21 | [
[
"Tsupko",
"Oleg Yu.",
""
],
[
"Fan",
"Zuhui",
""
],
[
"Bisnovatyi-Kogan",
"Gennady S.",
""
]
] | Advancements in the black hole shadow observations may allow us not only to investigate physics in the strong gravity regime, but also to use them in cosmological studies. In this paper, we propose to use the shadow of supermassive black holes as a standard ruler for cosmological applications assuming the black hole ma... |
1210.5505 | Martin Richarte MR | Luis P. Chimento and Mart\'in G. Richarte | Dark matter, dark energy, and dark radiation coupled with a transversal
interaction | 9 pages, 4 figures. Accepted for publication in Physical Review D | Phys. Rev. D 86, 103501 (2012) | 10.1103/PhysRevD.86.103501 | Phys. Rev. D 86, 103501 (2012) | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a cosmological scenario with three interacting components that
includes dark matter, dark energy, and radiation in the spatially flat
Friedmann-Robertson-Walker universe. We introduce a 3-dimensional internal
space, the interaction vector $\mathbf{Q}=(Q_{x}, Q_{m}, Q_{r})$ satisfying the
constraint pla... | [
{
"created": "Fri, 19 Oct 2012 19:32:25 GMT",
"version": "v1"
}
] | 2013-04-02 | [
[
"Chimento",
"Luis P.",
""
],
[
"Richarte",
"Martín G.",
""
]
] | We investigate a cosmological scenario with three interacting components that includes dark matter, dark energy, and radiation in the spatially flat Friedmann-Robertson-Walker universe. We introduce a 3-dimensional internal space, the interaction vector $\mathbf{Q}=(Q_{x}, Q_{m}, Q_{r})$ satisfying the constraint plane... |
1609.01227 | Cesar Merlin | Cesar Merlin, Amos Ori, Leor Barack, Adam Pound, Maarten van de Meent | Completion of metric reconstruction for a particle orbiting a Kerr black
hole | 27 pages, Minor typos corrected | Phys. Rev. D 94, 104066 (2016) | 10.1103/PhysRevD.94.104066 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum perturbations of the Kerr metric can be reconstructed from the
corresponding perturbation in either of the two Weyl scalars $\psi_0$ or
$\psi_4$, using a procedure described by Chrzanowski and others in the 1970s.
More recent work, motivated within the context of self-force physics, extends
the procedure to me... | [
{
"created": "Mon, 5 Sep 2016 17:29:30 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Sep 2016 15:34:51 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Dec 2016 11:59:19 GMT",
"version": "v3"
}
] | 2016-12-06 | [
[
"Merlin",
"Cesar",
""
],
[
"Ori",
"Amos",
""
],
[
"Barack",
"Leor",
""
],
[
"Pound",
"Adam",
""
],
[
"van de Meent",
"Maarten",
""
]
] | Vacuum perturbations of the Kerr metric can be reconstructed from the corresponding perturbation in either of the two Weyl scalars $\psi_0$ or $\psi_4$, using a procedure described by Chrzanowski and others in the 1970s. More recent work, motivated within the context of self-force physics, extends the procedure to metr... |
2303.02765 | Craig J. Hogan | Craig Hogan, Stephan S. Meyer, Nathaniel Selub, and Frederick Wehlen | Angular correlations on causally-coherent inflationary horizons | null | null | 10.1088/1361-6382/ace608 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a model for correlations of cosmic microwave background anisotropy
on the largest angular scales, based on standard causal geometrical
relationships in slow-roll inflation. Unlike standard models based on quantized
field modes, it describes perturbations with nonlocal directional coherence on
spherical bou... | [
{
"created": "Sun, 5 Mar 2023 20:11:54 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jun 2023 18:20:10 GMT",
"version": "v2"
}
] | 2023-08-02 | [
[
"Hogan",
"Craig",
""
],
[
"Meyer",
"Stephan S.",
""
],
[
"Selub",
"Nathaniel",
""
],
[
"Wehlen",
"Frederick",
""
]
] | We develop a model for correlations of cosmic microwave background anisotropy on the largest angular scales, based on standard causal geometrical relationships in slow-roll inflation. Unlike standard models based on quantized field modes, it describes perturbations with nonlocal directional coherence on spherical bound... |
2407.18084 | Filippo Bouch\`e | Filippo Bouch\`e, Salvatore Capozziello, Ciro De Simone, Vincenzo
Salzano | Testing non-local gravity through Ultra-Diffuse Galaxies kinematics | null | Physics of the Dark Universe 46, 101579 (2024) | 10.1016/j.dark.2024.101579 | null | gr-qc astro-ph.CO astro-ph.GA hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | The emergence of the Ultra-Diffuse Galaxies in recent years has posed a
severe challenge to the galaxy formation models as well as the Extended
Theories of Gravity. The existence of both dark matter lacking and dark matter
dominated systems within the same family of astrophysical objects indeed
requires the gravity m... | [
{
"created": "Thu, 25 Jul 2024 14:47:18 GMT",
"version": "v1"
}
] | 2024-07-26 | [
[
"Bouchè",
"Filippo",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"De Simone",
"Ciro",
""
],
[
"Salzano",
"Vincenzo",
""
]
] | The emergence of the Ultra-Diffuse Galaxies in recent years has posed a severe challenge to the galaxy formation models as well as the Extended Theories of Gravity. The existence of both dark matter lacking and dark matter dominated systems within the same family of astrophysical objects indeed requires the gravity mod... |
0904.1960 | David Delphenich | D. H. Delphenich | On the pre-metric foundations of wave mechanics I: massless waves | 25 pages, 1 figure | Annalen Phys.18:206-230,2009 | 10.1002/andp.200810343 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mechanics of wave motion in a medium are founded in conservation laws for
the physical quantities that the waves carry, combined with the constitutive
laws of the medium, and define Lorentzian structures only in degenerate cases
of the dispersion laws that follow from the field equations. It is suggested
that the... | [
{
"created": "Mon, 13 Apr 2009 15:54:58 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Delphenich",
"D. H.",
""
]
] | The mechanics of wave motion in a medium are founded in conservation laws for the physical quantities that the waves carry, combined with the constitutive laws of the medium, and define Lorentzian structures only in degenerate cases of the dispersion laws that follow from the field equations. It is suggested that the t... |
1408.2182 | Jaedong Choi | Jaedong Choi | Anisotropy universe in doubly warped product scheme | arXiv admin note: substantial text overlap with arXiv:1306.3020; and
text overlap with arXiv:gr-qc/0410090 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the GMGHS spacetimes to analyze the evolution of the anisotropy
universe, which can be treated as a doubly warped products manifold possessing
warping functions (or scale factor) having the Kantowski-Sachs solution which
represents homogeneous but anisotropically expanding(contracting) cosmology. We
investig... | [
{
"created": "Sun, 10 Aug 2014 03:38:01 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jul 2015 05:43:22 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Jan 2016 11:51:34 GMT",
"version": "v3"
},
{
"created": "Mon, 11 Jan 2016 06:36:22 GMT",
"version": "v4"
}
] | 2016-01-12 | [
[
"Choi",
"Jaedong",
""
]
] | We study the GMGHS spacetimes to analyze the evolution of the anisotropy universe, which can be treated as a doubly warped products manifold possessing warping functions (or scale factor) having the Kantowski-Sachs solution which represents homogeneous but anisotropically expanding(contracting) cosmology. We investigat... |
1801.03757 | Juho Lankinen | Juho Lankinen and Iiro Vilja | Decaying Massive Particle in Matter and Radiation Dominated Eras | 6 pages, 2 figures | Phys. Rev. D 97, 065004 (2018) | 10.1103/PhysRevD.97.065004 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to the standard model of cosmology, the early universe has been
dominated by radiation or non-relativistic matter in several eras of its
history. However, many cosmological calculations involving particle processes
are commonly done using Minkowskian results for them, although, for more
precise treatment, q... | [
{
"created": "Thu, 11 Jan 2018 13:47:42 GMT",
"version": "v1"
}
] | 2018-03-12 | [
[
"Lankinen",
"Juho",
""
],
[
"Vilja",
"Iiro",
""
]
] | According to the standard model of cosmology, the early universe has been dominated by radiation or non-relativistic matter in several eras of its history. However, many cosmological calculations involving particle processes are commonly done using Minkowskian results for them, although, for more precise treatment, qua... |
1805.08156 | Mauricio Bellini | Luis Santiago Ridao, Marcos Ramiro Alfredo Arcod\'iia, Jes\'us
Mart\'in Romero, Mauricio Bellini (IFIMAR - CONICET & UNMdP) | Inflationary gravitational waves from unified spinor fields | Version accepted in Eur. Phys. J. Plus | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent observations of Gravitational Waves (GW) generated by black-hole
collisions have opened a new window to explore the universe in diverse scales.
Detection of primordial gravitational waves is expected to happen in the next
years. However, the standard theory to describe these effects was developed for
weak grav... | [
{
"created": "Mon, 21 May 2018 16:20:44 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Sep 2018 00:04:30 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Oct 2018 16:04:53 GMT",
"version": "v3"
},
{
"created": "Fri, 2 Nov 2018 16:22:46 GMT",
"version": "v4"
}
] | 2018-11-05 | [
[
"Ridao",
"Luis Santiago",
"",
"IFIMAR - CONICET & UNMdP"
],
[
"Arcodíia",
"Marcos Ramiro Alfredo",
"",
"IFIMAR - CONICET & UNMdP"
],
[
"Romero",
"Jesús Martín",
"",
"IFIMAR - CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONI... | Recent observations of Gravitational Waves (GW) generated by black-hole collisions have opened a new window to explore the universe in diverse scales. Detection of primordial gravitational waves is expected to happen in the next years. However, the standard theory to describe these effects was developed for weak gravit... |
1611.05832 | Ezequiel Boero | Ezequiel F. Boero and Osvaldo M. Moreschi | Geometrical models for the study of astrophysical systems with
spheroidal symmetry imbedded in a standard cosmology: The case of cosmic
voids | 10 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a class of general prolate and oblate spheroidal spacetimes for
the description of cosmic structures in the Universe. They are exact geometries
which represent, in an appropriated way, the imbedding of spheroidal
matter-energy distributions within a standard cosmological scenario, and
therefore they allow ... | [
{
"created": "Thu, 17 Nov 2016 19:53:28 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2016 13:53:43 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Jan 2017 15:30:26 GMT",
"version": "v3"
}
] | 2017-01-27 | [
[
"Boero",
"Ezequiel F.",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | We present a class of general prolate and oblate spheroidal spacetimes for the description of cosmic structures in the Universe. They are exact geometries which represent, in an appropriated way, the imbedding of spheroidal matter-energy distributions within a standard cosmological scenario, and therefore they allow fo... |
gr-qc/0305079 | Buffenoir | E. Buffenoir, K. Noui | Unfashionable observations about three dimensional gravity | 50 pages, written in LaTex, 3 pictures in encapsulated postscript | null | null | null | gr-qc hep-th | null | It is commonly accepted that the study of 2+1 dimensional quantum gravity
could teach us something about the 3+1 dimensional case. The non-perturbative
methods developed in this case share, as basic ingredient, a reformulation of
gravity as a gauge field theory. However, these methods suffer many problems.
Firstly, t... | [
{
"created": "Wed, 21 May 2003 08:31:51 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jun 2003 08:17:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Buffenoir",
"E.",
""
],
[
"Noui",
"K.",
""
]
] | It is commonly accepted that the study of 2+1 dimensional quantum gravity could teach us something about the 3+1 dimensional case. The non-perturbative methods developed in this case share, as basic ingredient, a reformulation of gravity as a gauge field theory. However, these methods suffer many problems. Firstly, thi... |
gr-qc/9507034 | null | E.S.C. Ching, P.T. Leung, W.M. Suen and K. Young | Wave Propagation in Gravitational Systems: Completeness of Quasinormal
Modes | null | Phys.Rev.D54:3778-3791,1996 | 10.1103/PhysRevD.54.3778 | WUGRAV-94-15 | gr-qc | null | The dynamics of relativistic stars and black holes are often studied in terms
of the quasinormal modes (QNM's) of the Klein-Gordon (KG) equation with
different effective potentials $V(x)$. In this paper we present a systematic
study of the relation between the structure of the QNM's of the KG equation and
the form of... | [
{
"created": "Fri, 14 Jul 1995 18:49:09 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Ching",
"E. S. C.",
""
],
[
"Leung",
"P. T.",
""
],
[
"Suen",
"W. M.",
""
],
[
"Young",
"K.",
""
]
] | The dynamics of relativistic stars and black holes are often studied in terms of the quasinormal modes (QNM's) of the Klein-Gordon (KG) equation with different effective potentials $V(x)$. In this paper we present a systematic study of the relation between the structure of the QNM's of the KG equation and the form of $... |
1108.3471 | Masahiro Shimano | Masahiro Shimano, Tomohiro Harada and Naoki Tsukamoto | A trapped surface in the higher-dimensional self-similar Vaidya
spacetime | 13 pages, 5 figures | null | 10.1088/1742-6596/314/1/012068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a trapped surface and naked singularity in a $D$-dimensional
Vaidya spacetime with a self-similar mass function. A trapped surface is
defined as a closed spacelike $(D-2)$-surface which has negative both null
expansions. There is no trapped surface in the Minkowski spacetime. However, in
a four-dimensi... | [
{
"created": "Wed, 17 Aug 2011 13:01:33 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Shimano",
"Masahiro",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Tsukamoto",
"Naoki",
""
]
] | We investigate a trapped surface and naked singularity in a $D$-dimensional Vaidya spacetime with a self-similar mass function. A trapped surface is defined as a closed spacelike $(D-2)$-surface which has negative both null expansions. There is no trapped surface in the Minkowski spacetime. However, in a four-dimension... |
1504.07335 | T\'erence Delsate | T\'erence Delsate | I-Love irrotationally | short note, 6 pages, 6 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short note, we investigate the existence of universal relations
between the gravimagnetic Love number of irrotational stars and the
dimensionless moment of inertia. These Love numbers take into account the
internal motion of the fluid, while the star is globally irrotational. The goal
is to extend the so-call... | [
{
"created": "Tue, 28 Apr 2015 03:04:35 GMT",
"version": "v1"
}
] | 2015-04-29 | [
[
"Delsate",
"Térence",
""
]
] | In this short note, we investigate the existence of universal relations between the gravimagnetic Love number of irrotational stars and the dimensionless moment of inertia. These Love numbers take into account the internal motion of the fluid, while the star is globally irrotational. The goal is to extend the so-called... |
1602.02676 | James Franson | J.D. Franson | Numerical calculation of the relativistic acceleration of an electron in
curved spacetime using the Dirac equation | 13 pages, 4 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relativistic acceleration of an electron in a uniform gravitational field
is calculated numerically using the generalization of the Dirac equation to
curved spacetime. Equivalent results are also obtained analytically using an
iterative approach that is not based on the WKB approximation, which has been
used exte... | [
{
"created": "Mon, 8 Feb 2016 18:20:42 GMT",
"version": "v1"
}
] | 2016-02-09 | [
[
"Franson",
"J. D.",
""
]
] | The relativistic acceleration of an electron in a uniform gravitational field is calculated numerically using the generalization of the Dirac equation to curved spacetime. Equivalent results are also obtained analytically using an iterative approach that is not based on the WKB approximation, which has been used extens... |
2101.12066 | Sergey Pavluchenko A. | Dmitry Chirkov and Sergey A. Pavluchenko | Some aspects of the cosmological dynamics in Einstein-Gauss-Bonnet
gravity | 14 pages, 2 figures | Mod. Phys. Lett. A 36, 2150092 (2021) | 10.1142/S0217732321500929 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some aspects of dynamical compactification scenario where
stabilisation of extra dimensions occurs due to presence the Gauss-Bonnet term
and non-zero spatial curvature. In the framework of the model under
consideration there exists two-stages scenario of evolution of a Universe: on
the first stage, the space... | [
{
"created": "Thu, 28 Jan 2021 15:38:32 GMT",
"version": "v1"
}
] | 2021-05-12 | [
[
"Chirkov",
"Dmitry",
""
],
[
"Pavluchenko",
"Sergey A.",
""
]
] | We study some aspects of dynamical compactification scenario where stabilisation of extra dimensions occurs due to presence the Gauss-Bonnet term and non-zero spatial curvature. In the framework of the model under consideration there exists two-stages scenario of evolution of a Universe: on the first stage, the space e... |
1206.5462 | Chen Songbai | Songbai Chen, Qiyuan Pan, Jiliang Jing | Effects of quintessence on holographic p-wave superconductors | 15 pages, 5 figures. arXiv admin note: text overlap with
arXiv:1206.2069, and with arXiv:1007.3321, arXiv:1106.0784 by other authors | Commun. Theor. Phys. 60, 471 (2013) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a holographic p-wave superconductor model in the background of
quintessence AdS black hole with an SU(2) Yang-Mills gauge field and then probe
the effects of quintessence on the holographic p-wave superconductor. We
investigate the relation between the critical temperature and the state
parameter of quin... | [
{
"created": "Sun, 24 Jun 2012 03:56:21 GMT",
"version": "v1"
}
] | 2013-10-08 | [
[
"Chen",
"Songbai",
""
],
[
"Pan",
"Qiyuan",
""
],
[
"Jing",
"Jiliang",
""
]
] | We construct a holographic p-wave superconductor model in the background of quintessence AdS black hole with an SU(2) Yang-Mills gauge field and then probe the effects of quintessence on the holographic p-wave superconductor. We investigate the relation between the critical temperature and the state parameter of quinte... |
0705.0484 | Ella Jamsin | Ella Jamsin | A Note on Conserved Charges of Asymptotically Flat and Anti-de Sitter
Spaces in Arbitrary Dimensions | 27 pages; v2 : references added, minor corrections; v3 : replaced to
match published version forthcoming in General Relativity and Gravitation | Gen.Rel.Grav.40:2569-2590,2008 | 10.1007/s10714-008-0640-6 | ULB-TH/07-18 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The calculation of conserved charges of black holes is a rich problem, for
which many methods are known. Until recently, there was some controversy on the
proper definition of conserved charges in asymptotically anti-de Sitter (AdS)
spaces in arbitrary dimensions. This paper provides a systematic and explicit
Hamilto... | [
{
"created": "Thu, 3 May 2007 15:58:07 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2007 12:42:29 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Aug 2008 16:38:11 GMT",
"version": "v3"
}
] | 2008-12-18 | [
[
"Jamsin",
"Ella",
""
]
] | The calculation of conserved charges of black holes is a rich problem, for which many methods are known. Until recently, there was some controversy on the proper definition of conserved charges in asymptotically anti-de Sitter (AdS) spaces in arbitrary dimensions. This paper provides a systematic and explicit Hamiltoni... |
gr-qc/0411085 | Takashi Hamazaki | Takashi Hamazaki | Evolution of Cosmological Perturbations in the Universe dominated by
Resonant Scalar Fields | 50 pages | Nucl. Phys.B698:335-385,2004 | 10.1016/j.nuclphysb.2004.08.008 | null | gr-qc | null | Recently a Hamiltonian formulation for the evolution of the universe
dominated by multiple oscillatory scalar fields was developed by the present
author and was applied to the investigation of the evolution of cosmological
perturbations on superhorizon scales in the case that the scalar fields have
incommensurable ma... | [
{
"created": "Wed, 17 Nov 2004 01:36:46 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Hamazaki",
"Takashi",
""
]
] | Recently a Hamiltonian formulation for the evolution of the universe dominated by multiple oscillatory scalar fields was developed by the present author and was applied to the investigation of the evolution of cosmological perturbations on superhorizon scales in the case that the scalar fields have incommensurable mass... |
1511.00439 | Andronikos Paliathanasis | Andronikos Paliathanasis, Michael Tsamparlis, Spyros Basilakos and
John D. Barrow | Classical and Quantum Solutions in Brans-Dicke Cosmology with a Perfect
Fluid | 13 pages, 2 figures, discussion improved, accepted for publication by
Phys. Rev. D | Phys. Rev. D 93, 043528 (2016) | 10.1103/PhysRevD.93.043528 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the application of group invariant transformations in order to
constrain a flat isotropic and homogeneous cosmological model, containing of a
Brans-Dicke scalar field and a perfect fluid with a constant equation of state
parameter $w$, where the latter is not interacting with the scalar field in the
gravi... | [
{
"created": "Mon, 2 Nov 2015 10:55:31 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2016 16:28:51 GMT",
"version": "v2"
}
] | 2016-03-02 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Tsamparlis",
"Michael",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Barrow",
"John D.",
""
]
] | We consider the application of group invariant transformations in order to constrain a flat isotropic and homogeneous cosmological model, containing of a Brans-Dicke scalar field and a perfect fluid with a constant equation of state parameter $w$, where the latter is not interacting with the scalar field in the gravita... |
0707.0867 | Luis Herrera | L. Herrera, J. Carot, A. Di Prisco | Frame dragging and super-energy | 12 pages Latex. To appear in Phys.Rev. D. Typos corrected | Phys.Rev.D76:044012,2007 | 10.1103/PhysRevD.76.044012 | null | gr-qc math-ph math.MP | null | We show that the vorticity appearing in stationary vacuum spacetimes is
always related to the existence of a flow of super-energy on the plane
orthogonal to the vorticity vector. This result, toghether with the previously
established link between vorticity and super--energy in radiative (Bondi-Sachs)
spacetimes stren... | [
{
"created": "Thu, 5 Jul 2007 21:35:49 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Aug 2007 14:45:27 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Herrera",
"L.",
""
],
[
"Carot",
"J.",
""
],
[
"Di Prisco",
"A.",
""
]
] | We show that the vorticity appearing in stationary vacuum spacetimes is always related to the existence of a flow of super-energy on the plane orthogonal to the vorticity vector. This result, toghether with the previously established link between vorticity and super--energy in radiative (Bondi-Sachs) spacetimes strengt... |
gr-qc/9702012 | KZWin | Jennie Traschen and K. Z. Win | Instanton Supported Scalar Hair on Black Holes | plain TeX 14 pages. Uses harvmac b and epsf. 14 figures | null | null | null | gr-qc hep-th | null | We present analytical perturbative, and numerical solutions of the Einstein
equation which describe a black hole with a nontrivial dilaton field and a
purely topological gauge potential. The gauge potential has zero field strength
and hence no stress-energy, but it does couple to virtual string worldsheets
which wrap... | [
{
"created": "Wed, 5 Feb 1997 20:29:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Traschen",
"Jennie",
""
],
[
"Win",
"K. Z.",
""
]
] | We present analytical perturbative, and numerical solutions of the Einstein equation which describe a black hole with a nontrivial dilaton field and a purely topological gauge potential. The gauge potential has zero field strength and hence no stress-energy, but it does couple to virtual string worldsheets which wrap a... |
2205.03789 | Soumya Chakrabarti | Soumya Chakrabarti, Koushik Dutta and Jackson Levi Said | Screening Mechanism and Late-time Cosmology: Role of a
Chameleon-Brans-Dicke Scalar Field | 14 pages, 10 figures, Accepted for publication in MNRAS | null | 10.1093/mnras/stac1321 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a way in which the geometric scalar field in a Brans-Dicke theory
can evade local astronomical tests and act as a driver of the late-time cosmic
acceleration. This requires a self-interaction of the Brans-Dicke scalar as
well as an interaction with ordinary matter. The scalar field in this construct
acquir... | [
{
"created": "Sun, 8 May 2022 05:37:03 GMT",
"version": "v1"
}
] | 2022-05-25 | [
[
"Chakrabarti",
"Soumya",
""
],
[
"Dutta",
"Koushik",
""
],
[
"Said",
"Jackson Levi",
""
]
] | We discuss a way in which the geometric scalar field in a Brans-Dicke theory can evade local astronomical tests and act as a driver of the late-time cosmic acceleration. This requires a self-interaction of the Brans-Dicke scalar as well as an interaction with ordinary matter. The scalar field in this construct acquires... |
gr-qc/0510021 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the Topical Group in Gravitation
of APS | 21 pages. Jorge Pullin (editor) | null | null | MOG-26 | gr-qc | null | GGR News:
The WYP speakers program, by Richard Price
We hear that..., by Jorge Pullin
100 Years ago, by Jorge Pullin
Research Briefs:
What's new in LIGO, by David Shoemaker
Recent developments in the information loss paradox, by Eanna Flanagan
Gravity Probe B mission ends, by Bob Kahn
Conference repor... | [
{
"created": "Wed, 5 Oct 2005 20:45:58 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Pullin",
"Jorge",
""
]
] | GGR News: The WYP speakers program, by Richard Price We hear that..., by Jorge Pullin 100 Years ago, by Jorge Pullin Research Briefs: What's new in LIGO, by David Shoemaker Recent developments in the information loss paradox, by Eanna Flanagan Gravity Probe B mission ends, by Bob Kahn Conference reports: 6th Edoardo Am... |
1806.04719 | Junji Jia | Xiankai Pang, Junji Jia | Gravitational lensing of massive particles in Reissner-Nordstr\"om
spacetime | Revised version: references added; some figures improved. 27 pages, 8
figures and 2 tables | null | 10.1088/1361-6382/ab0512 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the deflection angle $\Delta \varphi$ and gravitational
lensing of both lightlike and timelike neutral rays in Reissner-Nordstr\"om
(RN) spacetimes. The exact deflection angle is found as an elliptical function
of the impact parameter $b$ and velocity $v$ of the ray, and the charge $Q$ of
the sp... | [
{
"created": "Tue, 12 Jun 2018 19:02:42 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2018 09:12:05 GMT",
"version": "v2"
}
] | 2019-03-20 | [
[
"Pang",
"Xiankai",
""
],
[
"Jia",
"Junji",
""
]
] | In this work we study the deflection angle $\Delta \varphi$ and gravitational lensing of both lightlike and timelike neutral rays in Reissner-Nordstr\"om (RN) spacetimes. The exact deflection angle is found as an elliptical function of the impact parameter $b$ and velocity $v$ of the ray, and the charge $Q$ of the spac... |
2309.01976 | Ayan Banerjee | Takol Tangphati, C. R. Muniz, Anirudh Pradhan and Ayan Banerjee | Traversable wormholes in Rastall-Rainbow Gravity | 12 pages, 6 figures, Minor typos corrected, few short comments added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the existence of asymptotically flat wormhole
geometries within the framework of Rastall-Rainbow modified gravity, a
synthesis of two distinct theoretical models: Rastall theory and the Rainbow
description. Our study uncovers that, when considering specific combinations of
free parameter... | [
{
"created": "Tue, 5 Sep 2023 06:12:22 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Sep 2023 04:08:53 GMT",
"version": "v2"
}
] | 2023-09-12 | [
[
"Tangphati",
"Takol",
""
],
[
"Muniz",
"C. R.",
""
],
[
"Pradhan",
"Anirudh",
""
],
[
"Banerjee",
"Ayan",
""
]
] | In this paper, we investigate the existence of asymptotically flat wormhole geometries within the framework of Rastall-Rainbow modified gravity, a synthesis of two distinct theoretical models: Rastall theory and the Rainbow description. Our study uncovers that, when considering specific combinations of free parameters ... |
gr-qc/9801073 | Piotr Chrusciel | Piotr T. Chrusciel, Jacek Jezierski and Malcolm A.H. MacCallum | Uniqueness of the mass in the radiating regime | 8 pages, revtex | Phys.Rev.Lett. 80 (1998) 5052-5055 | 10.1103/PhysRevLett.80.5052 | A. Einstein Institute preprint AEI-055 | gr-qc | null | The usual approaches to the definition of energy give an ambiguous result for
the energy of fields in the radiating regime. We show that for a massless
scalar field in Minkowski space-time the definition may be rendered unambiguous
by adding the requirement that the energy cannot increase in retarded time. We
present... | [
{
"created": "Wed, 21 Jan 1998 19:00:57 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Jezierski",
"Jacek",
""
],
[
"MacCallum",
"Malcolm A. H.",
""
]
] | The usual approaches to the definition of energy give an ambiguous result for the energy of fields in the radiating regime. We show that for a massless scalar field in Minkowski space-time the definition may be rendered unambiguous by adding the requirement that the energy cannot increase in retarded time. We present a... |
2005.12370 | Paul R. Anderson | Paul R. Anderson, Eric D. Carlson, Taylor M. Ordines, and Bradley
Hicks | Semiclassical predictions regarding a pre-inflationary era and its
effects on the power spectrum | Parts of the paper have been substantially rewritten, minor changes
and corrections elsewhere, references added, Phys. Rev. D version, 34 pages,
6 figures | Phys. Rev. D 102, 063528 (2020) | 10.1103/PhysRevD.102.063528 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An investigation is undertaken into the properties and effects of a
preinflationary era during at least part of which semiclassical gravity was
valid. It is argued that if the Universe (or our part of it) was approximately
homogeneous and isotropic during that era, then the Universe was likely to have
been radiation ... | [
{
"created": "Mon, 25 May 2020 20:03:47 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jun 2020 15:51:10 GMT",
"version": "v2"
},
{
"created": "Mon, 24 May 2021 12:32:06 GMT",
"version": "v3"
}
] | 2021-05-25 | [
[
"Anderson",
"Paul R.",
""
],
[
"Carlson",
"Eric D.",
""
],
[
"Ordines",
"Taylor M.",
""
],
[
"Hicks",
"Bradley",
""
]
] | An investigation is undertaken into the properties and effects of a preinflationary era during at least part of which semiclassical gravity was valid. It is argued that if the Universe (or our part of it) was approximately homogeneous and isotropic during that era, then the Universe was likely to have been radiation do... |
gr-qc/0301011 | Wai-Mo Suen | Edwin Evans, A. Gopakumar, Philip Gressman, Sai Iyer, Mark Miller,
Wai-Mo Suen, and Hui-Min Zhang | Head-on/Near Head-on Collisions of Neutron Stars With a Realistic EOS | 5 pages, 7 figures, submitted to Phy. Rev. D Rapid Comm | Phys.Rev. D67 (2003) 104001 | 10.1103/PhysRevD.67.104001 | Wugrav-03-02 | gr-qc | null | It has been conjectured that in head-on collisions of neutron stars (NSs),
the merged object would not collapse promptly even if the total mass is higher
than the maximum stable mass of a cold NS. In this paper, we show that the
reverse is true: even if the total mass is {\it less} than the maximum stable
mass, the m... | [
{
"created": "Sun, 5 Jan 2003 15:21:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Evans",
"Edwin",
""
],
[
"Gopakumar",
"A.",
""
],
[
"Gressman",
"Philip",
""
],
[
"Iyer",
"Sai",
""
],
[
"Miller",
"Mark",
""
],
[
"Suen",
"Wai-Mo",
""
],
[
"Zhang",
"Hui-Min",
""
]
] | It has been conjectured that in head-on collisions of neutron stars (NSs), the merged object would not collapse promptly even if the total mass is higher than the maximum stable mass of a cold NS. In this paper, we show that the reverse is true: even if the total mass is {\it less} than the maximum stable mass, the mer... |
1908.02104 | Yan Peng | Yan Peng | On instabilities of stationary scalar field configurations supported by
reflecting compact stars | 9 pages | Physics Letters B 798(2019)134931 | 10.1016/j.physletb.2019.134931 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study instabilities of the system composed of stationary scalar fields and
asymptotically flat horizonless reflecting compact stars. In the probe limit,
we obtain bounds on the scalar field frequency. Below this bound, stationary
hairy stars are expected to suffer from nonlinear instabilities under massless
field ... | [
{
"created": "Tue, 6 Aug 2019 12:29:07 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 04:54:17 GMT",
"version": "v2"
}
] | 2019-09-18 | [
[
"Peng",
"Yan",
""
]
] | We study instabilities of the system composed of stationary scalar fields and asymptotically flat horizonless reflecting compact stars. In the probe limit, we obtain bounds on the scalar field frequency. Below this bound, stationary hairy stars are expected to suffer from nonlinear instabilities under massless field pe... |
gr-qc/9605038 | Hans Kastrup | H.A. Kastrup (RWTH Aachen) | On the Quantum Levels of Isolated Spherically Symmetric Gravitational
Systems | 13 pages, LaTeX, Replacement corrects a few misprints. No change of
content! | Phys.Lett.B385:75-80,1996 | 10.1016/0370-2693(96)00846-5 | PITHA 96/16 | gr-qc astro-ph hep-th | null | The known canonical quantum theory of a spherically symmetric pure
(Schwarzschild) gravitational system describes isolated black holes by plane
waves exp(-iMc^2\tau/\hbar) with respect to their continuous masses M and the
proper time \tau of obsevers at spatial infinity. On the other hand Bekenstein
and Mukhanov post... | [
{
"created": "Fri, 17 May 1996 15:21:00 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 1996 14:50:48 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Kastrup",
"H. A.",
"",
"RWTH Aachen"
]
] | The known canonical quantum theory of a spherically symmetric pure (Schwarzschild) gravitational system describes isolated black holes by plane waves exp(-iMc^2\tau/\hbar) with respect to their continuous masses M and the proper time \tau of obsevers at spatial infinity. On the other hand Bekenstein and Mukhanov postul... |
1711.01282 | Francesc Cunillera | Francesc Cunillera and Cristiano Germani | The Gross-Pitaevskii equations of a static and spherically symmetric
condensate of gravitons | v.4: Accepted for publication. 10 pages | null | 10.1088/1361-6382/aab97b | ICCUB-17-021 | gr-qc astro-ph.CO cond-mat.other hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the Dvali and G\'omez assumption that the end state
of a gravitational collapse is a Bose-Einstein condensate of gravitons. We then
construct the two Gross-Pitaevskii equations for a static and spherically
symmetric configuration of the condensate. These two equations correspond to
the const... | [
{
"created": "Fri, 3 Nov 2017 18:03:42 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Nov 2017 18:38:38 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Jan 2018 22:30:05 GMT",
"version": "v3"
},
{
"created": "Fri, 23 Mar 2018 19:28:29 GMT",
"version": "v4"
}
] | 2018-05-02 | [
[
"Cunillera",
"Francesc",
""
],
[
"Germani",
"Cristiano",
""
]
] | In this paper we consider the Dvali and G\'omez assumption that the end state of a gravitational collapse is a Bose-Einstein condensate of gravitons. We then construct the two Gross-Pitaevskii equations for a static and spherically symmetric configuration of the condensate. These two equations correspond to the constra... |
gr-qc/0603066 | Diego Julio Cirilo-Lombardo | Diego Julio Cirilo-Lombardo | Rotating charged Black Holes in Einstein-Born-Infeld theories and their
ADM mass | Final version and figures in journal. References and comments added | Gen.Rel.Grav.37:847-856,2005 | 10.1007/s10714-005-0071-6 | null | gr-qc hep-th | null | In this work, the solution of the Einstein equations for a slowly rotating
black hole with Born-Infeld charge is obtained. Geometrical properties and
horizons of this solution are analyzed. The conditions when the ADM mass (as in
the nonlinear static cases) and the ADM angular momentum of the system have
been modifie... | [
{
"created": "Thu, 16 Mar 2006 08:36:25 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jan 2007 08:07:26 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Cirilo-Lombardo",
"Diego Julio",
""
]
] | In this work, the solution of the Einstein equations for a slowly rotating black hole with Born-Infeld charge is obtained. Geometrical properties and horizons of this solution are analyzed. The conditions when the ADM mass (as in the nonlinear static cases) and the ADM angular momentum of the system have been modified ... |
1811.07972 | Kristina Giesel | Kristina Giesel, Parampreet Singh, David Winnekens | Dynamics of Dirac observables in canonical cosmological perturbation
theory | 43 pages, appendix on Dirac observables in perturbation theory added.
To appear in Class. Quant. Grav | 2019 Class. Quantum Grav. 36 085009 | 10.1088/1361-6382/ab0ed3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relational formalism based on geometrical clocks and Dirac observables in
linearized canonical cosmological perturbation theory is used to introduce an
efficient method to find evolution equations for gauge invariant variables. Our
method generalizes an existing technique by Pons, Salisbury and Sundermeyer [1,
2]... | [
{
"created": "Mon, 19 Nov 2018 20:50:04 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2019 12:47:46 GMT",
"version": "v2"
}
] | 2019-04-16 | [
[
"Giesel",
"Kristina",
""
],
[
"Singh",
"Parampreet",
""
],
[
"Winnekens",
"David",
""
]
] | The relational formalism based on geometrical clocks and Dirac observables in linearized canonical cosmological perturbation theory is used to introduce an efficient method to find evolution equations for gauge invariant variables. Our method generalizes an existing technique by Pons, Salisbury and Sundermeyer [1, 2] t... |
2311.14017 | Mohsen Fathi | Mohsen Fathi, Marco Olivares, Jos\'e R. Villanueva, Norman Cruz | Light propagation around a Kerr-like black hole immersed in an
inhomogeneous anisotropic plasma in Rastall gravity I: Analytical solutions
to the equations of motion | 33 pages, 37 figures | null | null | null | gr-qc astro-ph.HE math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we explore the behavior of light ray trajectories in the
exterior geometry of a rotating black hole within the Rastall theory of
gravity, which is surrounded by an inhomogeneous anisotropic electronic cold
plasma. By specifying the plasma's frequency profile, we derive fully
analytical solutions for th... | [
{
"created": "Thu, 23 Nov 2023 14:17:52 GMT",
"version": "v1"
}
] | 2023-11-27 | [
[
"Fathi",
"Mohsen",
""
],
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"José R.",
""
],
[
"Cruz",
"Norman",
""
]
] | In this paper, we explore the behavior of light ray trajectories in the exterior geometry of a rotating black hole within the Rastall theory of gravity, which is surrounded by an inhomogeneous anisotropic electronic cold plasma. By specifying the plasma's frequency profile, we derive fully analytical solutions for the ... |
2102.08084 | Philippe Spindel | Philippe Spindel | Dynamical torsion gravity backgrounds | 40 pages, a few more typos corrected | Phys. Rev. D 103, 124054 (2021) | 10.1103/PhysRevD.103.124054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We write the field equations of torsion gravity theories and the N\oe ther
identity they obey directly in terms of metric and contorsion tensor components
expressed with respect to natural coordinates, i.e. without using vierbien but
Lagrange multipliers. Then we obtain explicit solutions of these equations,
under sp... | [
{
"created": "Tue, 16 Feb 2021 11:15:09 GMT",
"version": "v1"
},
{
"created": "Tue, 4 May 2021 09:02:31 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Jun 2021 11:57:12 GMT",
"version": "v3"
}
] | 2021-06-30 | [
[
"Spindel",
"Philippe",
""
]
] | We write the field equations of torsion gravity theories and the N\oe ther identity they obey directly in terms of metric and contorsion tensor components expressed with respect to natural coordinates, i.e. without using vierbien but Lagrange multipliers. Then we obtain explicit solutions of these equations, under spec... |
gr-qc/0410102 | Thomas Sotiriou | T. P. Sotiriou, T. A. Apostolatos | Tracing the geometry around a massive, axisymmetric body to measure,
through gravitational waves, its mass moments and electromagnetic moments | Submitted to Phys. Rev. D | Phys.Rev. D71 (2005) 044005 | 10.1103/PhysRevD.71.044005 | null | gr-qc | null | The geometry around a rotating massive body, which carries charge and
electrical currents, could be described by its multipole moments (mass moments,
mass-current moments, electric moments, and magnetic moments). When a small
body is orbiting this massive body, it will move on geodesics, at least for a
time interval ... | [
{
"created": "Wed, 20 Oct 2004 17:53:49 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Oct 2004 12:28:12 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Sotiriou",
"T. P.",
""
],
[
"Apostolatos",
"T. A.",
""
]
] | The geometry around a rotating massive body, which carries charge and electrical currents, could be described by its multipole moments (mass moments, mass-current moments, electric moments, and magnetic moments). When a small body is orbiting this massive body, it will move on geodesics, at least for a time interval th... |
2108.11704 | Chiranjeeb Singha | Chiranjeeb Singha | Thermodynamics of multi-horizon spacetimes | 8 pages, revtex4, accepted for publication in General Relativity and
Gravitation | null | 10.1007/s10714-022-02924-5 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | There exist several well-established procedures for computing thermodynamics
for a single horizon spacetime. However, for a spacetime with multi-horizon,
the thermodynamics is not very clear. It is not fully understood whether there
exists a global temperature for the multi-horizon spacetime or not. Here we
show that... | [
{
"created": "Thu, 26 Aug 2021 11:01:11 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Aug 2021 10:44:02 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Apr 2022 13:03:52 GMT",
"version": "v3"
}
] | 2022-04-27 | [
[
"Singha",
"Chiranjeeb",
""
]
] | There exist several well-established procedures for computing thermodynamics for a single horizon spacetime. However, for a spacetime with multi-horizon, the thermodynamics is not very clear. It is not fully understood whether there exists a global temperature for the multi-horizon spacetime or not. Here we show that a... |
gr-qc/9704085 | Cesar F. Talavera | J. Cruz, J. Navarro-Salas, M. Navarro and C. F. Talavera | Symmetries and solvable models for evaporating 2D black holes | 4 pages, Latex. Talk given at the Second Conference on Quantum
Gravity and Constrained Dynamics. To appear in Proc. Supp. Nucl. Phys. B | Nucl.Phys.Proc.Suppl. 57 (1997) 184-187 | 10.1016/S0920-5632(97)00371-X | null | gr-qc | null | We study the evaporation process of a 2D black hole in thermal equilibrium
when the ingoing radiation is switched off suddenly. We also introduce global
symmetries of generic 2D dilaton gravity models which generalize the extra
symmetry of the CGHS model.
| [
{
"created": "Wed, 30 Apr 1997 10:22:30 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Cruz",
"J.",
""
],
[
"Navarro-Salas",
"J.",
""
],
[
"Navarro",
"M.",
""
],
[
"Talavera",
"C. F.",
""
]
] | We study the evaporation process of a 2D black hole in thermal equilibrium when the ingoing radiation is switched off suddenly. We also introduce global symmetries of generic 2D dilaton gravity models which generalize the extra symmetry of the CGHS model. |
0902.3816 | Khalid Saifullah | K. Saifullah | Geometric symmetries on Lorentzian manifolds | 16 pages | Nuovo Cim.B122:447,2007 | 10.1393/ncb/i2007-10373-y | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lie derivatives of various geometrical and physical quantities define
symmetries and conformal symmetries in general relativity. Thus we obtain
motions, collineations, conformal motions and conformal collineations. These
symmetries are used not only to find new solutions of Einstein's field
equations but to classify ... | [
{
"created": "Sun, 22 Feb 2009 19:07:28 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Saifullah",
"K.",
""
]
] | Lie derivatives of various geometrical and physical quantities define symmetries and conformal symmetries in general relativity. Thus we obtain motions, collineations, conformal motions and conformal collineations. These symmetries are used not only to find new solutions of Einstein's field equations but to classify th... |
gr-qc/9207002 | null | Riccardo Capovilla and Ted Jacobson | Remarks on Pure Spin Connection Formulations of Gravity | null | Mod.Phys.Lett.A7:1871-1878,1992 | 10.1142/S0217732392001579 | null | gr-qc | null | In the derivation of a pure spin connection action functional for gravity two
methods have been proposed. The first starts from a first order lagrangian
formulation, the second from a hamiltonian formulation. In this note we show
that they lead to identical results for the specific cases of pure gravity with
or witho... | [
{
"created": "Tue, 21 Jul 1992 23:52:00 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Capovilla",
"Riccardo",
""
],
[
"Jacobson",
"Ted",
""
]
] | In the derivation of a pure spin connection action functional for gravity two methods have been proposed. The first starts from a first order lagrangian formulation, the second from a hamiltonian formulation. In this note we show that they lead to identical results for the specific cases of pure gravity with or without... |
1801.04358 | Puxun Wu | Qihong Huang, Puxun Wu and Hongwei Yu | Stability of Einstein static universe in gravity theory with a
non-minimal derivative coupling | 19 pages, 1 figure, reference added | Eur.Phys.J. C78 (2018) no.1, 51 | 10.1140/epjc/s10052-018-5533-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergent mechanism provides a possible way to resolve the big bang
singularity problem by assuming that our universe originates from the Einstein
static (ES) state. Thus, the existence of a stable ES solution becomes a very
crucial prerequisite for the emergent scenario. In this paper, we study the
stability of a... | [
{
"created": "Sat, 13 Jan 2018 01:06:13 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2018 12:23:47 GMT",
"version": "v2"
}
] | 2018-02-14 | [
[
"Huang",
"Qihong",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | The emergent mechanism provides a possible way to resolve the big bang singularity problem by assuming that our universe originates from the Einstein static (ES) state. Thus, the existence of a stable ES solution becomes a very crucial prerequisite for the emergent scenario. In this paper, we study the stability of an ... |
1307.3009 | Luca Fabbri | Luca Fabbri | On the geometry of the Dirac matter with the Fermionic potentials and
its quantum properties | 11 pages | Int.J.Theor.Phys.53,3744-3755(2014) | 10.1007/s10773-014-2127-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the torsional completion of gravity with electrodynamics for
Dirac matter fields; we will see that these Dirac matter field equations will
develop torsionally-induced non-linear interactions, which can be manipulated
in order to be rearranged in the form of self-fermion potentials of a specific
structure:... | [
{
"created": "Thu, 11 Jul 2013 08:18:39 GMT",
"version": "v1"
},
{
"created": "Tue, 13 May 2014 14:21:52 GMT",
"version": "v2"
},
{
"created": "Thu, 22 May 2014 10:20:25 GMT",
"version": "v3"
}
] | 2014-10-07 | [
[
"Fabbri",
"Luca",
""
]
] | We consider the torsional completion of gravity with electrodynamics for Dirac matter fields; we will see that these Dirac matter field equations will develop torsionally-induced non-linear interactions, which can be manipulated in order to be rearranged in the form of self-fermion potentials of a specific structure: e... |
0806.0175 | Zeev Alexandrowicz | Zeev Alexandrowicz | Stochastic model Of universe which constantly creates dark energy
(Omega=0.7) and dark matter (Omega=0.3) but instantly at 0.12Gyr created
nucleons and radiation | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An assumption attributing vacuum mass energy to symmetric 'Null' fluctuation
which with equal probability either adds or subtracts, virtual planck either
particles or antiparticles leads to the following net resultant: 'Dark Energy'
virtual particle-antiparticle pairs and 'Dark Matter' real planck particles,
constant... | [
{
"created": "Sun, 1 Jun 2008 21:21:21 GMT",
"version": "v1"
}
] | 2008-06-03 | [
[
"Alexandrowicz",
"Zeev",
""
]
] | An assumption attributing vacuum mass energy to symmetric 'Null' fluctuation which with equal probability either adds or subtracts, virtual planck either particles or antiparticles leads to the following net resultant: 'Dark Energy' virtual particle-antiparticle pairs and 'Dark Matter' real planck particles, constantly... |
1801.06149 | Daniela Pugliese Dr | D. Pugliese and H. Quevedo | Observers in Kerr spacetimes: the ergoregion on the equatorial plane | 20 pages, 13 multi-panels figures, 2 tables | null | 10.1140/epjc/s10052-018-5569-7 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a detailed analysis of the properties of stationary observers
located on the equatorial plane of the ergosphere in a Kerr spacetime,
including light-surfaces. This study highlights crucial differences between
black hole and the super-spinner sources. In the case of Kerr naked
singularities, the results all... | [
{
"created": "Thu, 18 Jan 2018 17:57:28 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Pugliese",
"D.",
""
],
[
"Quevedo",
"H.",
""
]
] | We perform a detailed analysis of the properties of stationary observers located on the equatorial plane of the ergosphere in a Kerr spacetime, including light-surfaces. This study highlights crucial differences between black hole and the super-spinner sources. In the case of Kerr naked singularities, the results allow... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.