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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0401038 | Deborah A. Konkowski | D.A. Konkowski, T.M. Helliwell and C. Wieland | "Singularity" of Levi-Civita Spacetimes | 3 pages, no figures, submitted to Proceedings of the Tenth Marcel
Grossmann Meeting on General Relativity, Rio de Janeiro, July 20-26, 2003 | null | null | null | gr-qc | null | Levi-Civita spacetimes have both classical and quantum singularities. The
relationship between the two is used here to study and clarify the physical
aspects of the enigmatic Levi-Civita spacetimes.
| [
{
"created": "Sat, 10 Jan 2004 23:32:22 GMT",
"version": "v1"
}
] | 2009-09-29 | [
[
"Konkowski",
"D. A.",
""
],
[
"Helliwell",
"T. M.",
""
],
[
"Wieland",
"C.",
""
]
] | Levi-Civita spacetimes have both classical and quantum singularities. The relationship between the two is used here to study and clarify the physical aspects of the enigmatic Levi-Civita spacetimes. |
2208.11406 | Iarley P. Lobo Dr | Ernesto Rodrigues and Iarley P. Lobo | Revisiting Legendre transformations in Finsler geometry | 23+2 pages, 2 figures. Version with examples, improved discussion of
the results, inclusion of an appendix, typos fixed. Matches published
version. Updated Journal information | Int.J.Geom.Meth.Mod.Phys. (2024) 2450155 | 10.1142/S021988782450155X | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We discuss the conditions for mapping the geometric description of the
kinematics of particles that probe a given Hamiltonian in phase space to a
description in terms of Finsler geometry (and vice-versa).
| [
{
"created": "Wed, 24 Aug 2022 09:57:25 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2024 18:06:45 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Mar 2024 13:03:46 GMT",
"version": "v3"
}
] | 2024-03-26 | [
[
"Rodrigues",
"Ernesto",
""
],
[
"Lobo",
"Iarley P.",
""
]
] | We discuss the conditions for mapping the geometric description of the kinematics of particles that probe a given Hamiltonian in phase space to a description in terms of Finsler geometry (and vice-versa). |
0811.1286 | Masoud Alimohammadi | M. Alimohammadi and A. Ghalee | Remarks on generalized Gauss-Bonnet dark energy | 11 pages, LaTeX, a paragraph added, to be appeared in Phys. Rev. D | Phys.Rev.D79:063006,2009 | 10.1103/PhysRevD.79.063006 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified gravity with F(R,G) Lagrangian, G is the Gauss-Bonnet invariant,
is considered. It is shown that the phantom-divide-line crossing and the
deceleration to acceleration transition generally occur in these models. Our
results coincide with the known results of f(R)-gravity and f(G)-gravity
models. The contr... | [
{
"created": "Sat, 8 Nov 2008 18:12:06 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 2009 06:41:00 GMT",
"version": "v2"
}
] | 2009-12-04 | [
[
"Alimohammadi",
"M.",
""
],
[
"Ghalee",
"A.",
""
]
] | The modified gravity with F(R,G) Lagrangian, G is the Gauss-Bonnet invariant, is considered. It is shown that the phantom-divide-line crossing and the deceleration to acceleration transition generally occur in these models. Our results coincide with the known results of f(R)-gravity and f(G)-gravity models. The contrib... |
1303.6193 | Thomas Buchert | Thomas Buchert, Charly Nayet and Alexander Wiegand | Lagrangian theory of structure formation in relativistic cosmology II:
average properties of a generic evolution model | 24 pages, 15 figures, matches published version in PRD | Phys.Rev.D87:123503,2013 | 10.1103/PhysRevD.87.123503 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kinematical and dynamical properties of a generic inhomogeneous cosmological
model, spatially averaged with respect to free-falling (generalized
fundamental) observers, are investigated for the matter model irrotational
dust. Paraphrasing a previous Newtonian investigation, we present a
relativistic generalization of... | [
{
"created": "Mon, 25 Mar 2013 16:14:27 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2013 12:06:06 GMT",
"version": "v2"
}
] | 2013-06-12 | [
[
"Buchert",
"Thomas",
""
],
[
"Nayet",
"Charly",
""
],
[
"Wiegand",
"Alexander",
""
]
] | Kinematical and dynamical properties of a generic inhomogeneous cosmological model, spatially averaged with respect to free-falling (generalized fundamental) observers, are investigated for the matter model irrotational dust. Paraphrasing a previous Newtonian investigation, we present a relativistic generalization of a... |
1208.3028 | Sushant Ghosh Prof | Sushant G. Ghosh, Sunil D. Maharaj and Uma Papnoi | Radiating Kerr-Newman black hole in $f(R)$ gravity | 11 pages, 6 figures, new text and reference added | null | 10.1140/epjc/s10052-013-2473-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an exact radiating Kerr-Newman like black hole solution, with
constant curvature $R=R_0$ imposed, to {\it metric} $f(R)$ gravity via complex
transformations suggested by Newman-Janis. This generates a geometry which is
precisely that of radiating Kerr-Newman-de Sitter / anti-de Sitter with the
$f(R)$ gravit... | [
{
"created": "Wed, 15 Aug 2012 04:30:29 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jun 2013 09:32:18 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Maharaj",
"Sunil D.",
""
],
[
"Papnoi",
"Uma",
""
]
] | We derive an exact radiating Kerr-Newman like black hole solution, with constant curvature $R=R_0$ imposed, to {\it metric} $f(R)$ gravity via complex transformations suggested by Newman-Janis. This generates a geometry which is precisely that of radiating Kerr-Newman-de Sitter / anti-de Sitter with the $f(R)$ gravity ... |
gr-qc/0603075 | Ragab Gad | Ragab M. Gad | Energy and Momentum densities of cosmological models, with equation of
state $\rho=\mu$, in general relativity and teleparallel gravity | 15 pages, no figures, Minor typos corrected; version to appear in
International Journal of Theoretical Physics | Int.J.Theor.Phys.46:3263-3274,2007 | 10.1007/s10773-007-9445-8 | null | gr-qc | null | We calculated the energy and momentum densities of stiff fluid solutions,
using Einstein, Bergmann-Thomson and Landau-Lifshitz energy-momentum complexes,
in both general relativity and teleparallel gravity. In our analysis we get
different results comparing the aforementioned complexes with each other when
calculated... | [
{
"created": "Sun, 19 Mar 2006 13:44:36 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Aug 2006 11:08:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gad",
"Ragab M.",
""
]
] | We calculated the energy and momentum densities of stiff fluid solutions, using Einstein, Bergmann-Thomson and Landau-Lifshitz energy-momentum complexes, in both general relativity and teleparallel gravity. In our analysis we get different results comparing the aforementioned complexes with each other when calculated i... |
1911.04479 | Yan-Gang Miao | Yang Guo, Yan-Gang Miao | Quasinormal mode and stability of optical black holes in moving
dielectrics | v1: 13 pages, 5 figures, 2 tables; v2: clarifications and references
added; v3: clarifications added, final version to appear in Physical Review D | Phys. Rev. D 101, 024048 (2020) | 10.1103/PhysRevD.101.024048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasinormal mode and stability of optical black holes in moving
dielectrics. The results show that the real part of complex frequencies is
inversely proportional to but the absolute value of an imaginary part is
proportional to a refractive index. We obtain the conditions for forming a
black hole horizon... | [
{
"created": "Mon, 11 Nov 2019 09:38:13 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Nov 2019 13:51:58 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Jan 2020 14:44:33 GMT",
"version": "v3"
}
] | 2020-02-05 | [
[
"Guo",
"Yang",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We study the quasinormal mode and stability of optical black holes in moving dielectrics. The results show that the real part of complex frequencies is inversely proportional to but the absolute value of an imaginary part is proportional to a refractive index. We obtain the conditions for forming a black hole horizon i... |
2405.01212 | Thomas Thiemann | Thomas Thiemann | Non-perturbative Quantum Gravity in Fock representations | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative quantum gravity starts from prescribing a background metric.
That background metric is then used in order to carry out two separate steps:
1. One splits the non-perturbative metric into background and deviation from it
(graviton) and expands the action in terms of the graviton which results in an
ifinite... | [
{
"created": "Thu, 2 May 2024 11:50:14 GMT",
"version": "v1"
}
] | 2024-05-03 | [
[
"Thiemann",
"Thomas",
""
]
] | Perturbative quantum gravity starts from prescribing a background metric. That background metric is then used in order to carry out two separate steps: 1. One splits the non-perturbative metric into background and deviation from it (graviton) and expands the action in terms of the graviton which results in an ifinite s... |
gr-qc/9708059 | Martin Rainer | M. Rainer and H. Salehi | A regularizing commutant duality for a kinematically covariant partial
ordered net of observables | LaTeX, to appear in: Proc. XXI. Int. Sem. on Group Theor. Methods,
Goslar (1996), eds. Doebner et al | null | null | IPM-96 | gr-qc | null | We consider a net of *-algebras, locally around any point of observation,
equipped with a natural partial order related to the isotony property. Assuming
the underlying manifold of the net to be a differentiable, this net shall be
kinematically covariant under general diffeomorphisms. However, the dynamical
relations... | [
{
"created": "Sun, 24 Aug 1997 15:17:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rainer",
"M.",
""
],
[
"Salehi",
"H.",
""
]
] | We consider a net of *-algebras, locally around any point of observation, equipped with a natural partial order related to the isotony property. Assuming the underlying manifold of the net to be a differentiable, this net shall be kinematically covariant under general diffeomorphisms. However, the dynamical relations, ... |
1112.5639 | Natalia Kiriushcheva | N. Kiriushcheva, P. G. Komorowski, and S. V. Kuzmin | Comment on "Modified F(R) Ho\v{r}ava-Lifshitz gravity: a way to
accelerating FRW cosmology" by M. Chaichian, S. Nojiri, S. D. Odintsov, M.
Oksanen, A. Tureanu | 8 pages, minor corrections | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The partial Hamiltonian analysis of the Ho\v{r}ava-type action presented in
the paper by M. Chaichian, S. Nojiri, S. D. Odintsov, M. Oksanen, A. Tureanu
(Class. Quant. Grav. 27 (2011) 185021) is incorrect; for the authors' choice of
variables, a covariant shift, instead of a contravariant shift which is the one
usual... | [
{
"created": "Fri, 23 Dec 2011 19:10:55 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Jan 2012 23:41:35 GMT",
"version": "v2"
}
] | 2012-01-31 | [
[
"Kiriushcheva",
"N.",
""
],
[
"Komorowski",
"P. G.",
""
],
[
"Kuzmin",
"S. V.",
""
]
] | The partial Hamiltonian analysis of the Ho\v{r}ava-type action presented in the paper by M. Chaichian, S. Nojiri, S. D. Odintsov, M. Oksanen, A. Tureanu (Class. Quant. Grav. 27 (2011) 185021) is incorrect; for the authors' choice of variables, a covariant shift, instead of a contravariant shift which is the one usually... |
1612.04228 | Yoshimasa Kurihara | Yoshimasa Kurihara | Stochastic Metric Space and Quantum Mechanics | 39 pages, 0 figures | J. Phys. Commun. 2 (2018) 035025 | 10.1088/2399-6528/aaa851 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new idea for the quantization of dynamic systems, as well as space time
itself, using a stochastic metric is proposed. The quantum mechanics of a mass
point is constructed on a space time manifold using a stochastic metric. A
stochastic metric space is, in brief, a metric space whose metric tensor is
given stochast... | [
{
"created": "Tue, 13 Dec 2016 15:21:15 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Mar 2017 16:37:10 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Aug 2017 03:20:55 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Sep 2017 09:13:04 GMT",
"version": "v4"
},
{
"cr... | 2018-03-22 | [
[
"Kurihara",
"Yoshimasa",
""
]
] | A new idea for the quantization of dynamic systems, as well as space time itself, using a stochastic metric is proposed. The quantum mechanics of a mass point is constructed on a space time manifold using a stochastic metric. A stochastic metric space is, in brief, a metric space whose metric tensor is given stochastic... |
1107.3975 | Jarmo M\"akel\"a Dr. | Jarmo M\"akel\"a | Partition Function of the Schwarzschild Black Hole | 33 pages, 1 figure. Published in the special issue "Black Hole
Thermodynamics" of the Journal Entropy | Entropy 2011, 13, 1324-1325 | 10.3390/e13071324 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a microscopic model of a stretched horizon of the Schwarzschild
black hole. In our model the stretched horizon consists of a finite number of
discrete constituents. Assuming that the quantum states of the Schwarzschild
black hole are encoded in the quantum states of the constituents of its
stretched horiz... | [
{
"created": "Tue, 19 Jul 2011 10:16:41 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Mäkelä",
"Jarmo",
""
]
] | We consider a microscopic model of a stretched horizon of the Schwarzschild black hole. In our model the stretched horizon consists of a finite number of discrete constituents. Assuming that the quantum states of the Schwarzschild black hole are encoded in the quantum states of the constituents of its stretched horizon... |
1105.3396 | Naresh Dadhich | Naresh Dadhich | On the measure of spacetime and gravity | 5 pages, revtex, Received Honorable Mention in the 2011 Gravity
Research Foundation Awards for Essays on Gravitation | Int. J. Mod.Phys. D20 (2011) 2739-2747 | 10.1142/S0218271811020573 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By following the general guiding principle that nothing should be prescribed
or imposed on the universal entity, spacetime, we establish that it is the
homogeneity (by which we mean homogeneity and isotropy of space and homogeneity
of time) that requires not only a universally constant invariant velocity but
also an ... | [
{
"created": "Sat, 14 May 2011 07:06:06 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Dadhich",
"Naresh",
""
]
] | By following the general guiding principle that nothing should be prescribed or imposed on the universal entity, spacetime, we establish that it is the homogeneity (by which we mean homogeneity and isotropy of space and homogeneity of time) that requires not only a universally constant invariant velocity but also an in... |
1210.1615 | Jansen Formiga | J. B. Formiga and C. Romero | Dirac equation in non-Riemannian geometries | 13 pages; one reference added | null | 10.1142/S0219887813200120 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the Dirac equation in a geometry with torsion and non-metricity
balancing generality and simplicity as much as possible. In doing so, we use
the vielbein formalism and the Clifford algebra. We also use an index-free
formalism which allows us to construct objects that are totally invariant. It
turns out tha... | [
{
"created": "Fri, 5 Oct 2012 00:13:40 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Oct 2012 16:06:35 GMT",
"version": "v2"
}
] | 2013-05-28 | [
[
"Formiga",
"J. B.",
""
],
[
"Romero",
"C.",
""
]
] | We present the Dirac equation in a geometry with torsion and non-metricity balancing generality and simplicity as much as possible. In doing so, we use the vielbein formalism and the Clifford algebra. We also use an index-free formalism which allows us to construct objects that are totally invariant. It turns out that ... |
1001.3739 | Izzet Sakalli | I.Sakalli, H.Pasaoglu and M.Halilsoy | Entropy Conservation of Linear Dilaton Black Holes in Quantum Corrected
Hawking Radiation | 15 pages, no figures | International Journal of Theoretical Physics 50 (10): 3212-3224,
2011 | 10.1007/s10773-011-0824-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown recently that information is lost in the Hawking radiation
of the linear dilaton black holes in various theories when applying the
tunneling formulism without considering quantum gravity effects. In this
Letter, we recalculate the emission probability by taking into account of the
log-area correctio... | [
{
"created": "Thu, 21 Jan 2010 08:11:17 GMT",
"version": "v1"
}
] | 2012-02-16 | [
[
"Sakalli",
"I.",
""
],
[
"Pasaoglu",
"H.",
""
],
[
"Halilsoy",
"M.",
""
]
] | It has been shown recently that information is lost in the Hawking radiation of the linear dilaton black holes in various theories when applying the tunneling formulism without considering quantum gravity effects. In this Letter, we recalculate the emission probability by taking into account of the log-area correction ... |
2202.12133 | Soham Mukherjee | Soham Mukherjee, Nathan K. Johnson-McDaniel, Wolfgang Tichy, Steven L.
Liebling | Conformally curved initial data for charged, spinning black hole
binaries on arbitrary orbits | 17 pages, 7 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method to construct conformally curved initial data for charged
black hole binaries with spin on arbitrary orbits. We generalize the superposed
Kerr-Schild, extended conformal thin sandwich construction from [Lovelace et
al., Phys. Rev. D {78}, 084017 (2008)] to use Kerr-Newman metrics for the
superposed... | [
{
"created": "Thu, 24 Feb 2022 14:50:03 GMT",
"version": "v1"
}
] | 2022-02-25 | [
[
"Mukherjee",
"Soham",
""
],
[
"Johnson-McDaniel",
"Nathan K.",
""
],
[
"Tichy",
"Wolfgang",
""
],
[
"Liebling",
"Steven L.",
""
]
] | We present a method to construct conformally curved initial data for charged black hole binaries with spin on arbitrary orbits. We generalize the superposed Kerr-Schild, extended conformal thin sandwich construction from [Lovelace et al., Phys. Rev. D {78}, 084017 (2008)] to use Kerr-Newman metrics for the superposed b... |
1602.03176 | Mohd Shahalam | M. Shahalam, S. K. J. Pacif, R. Myrzakulov | Galileons, phantom fields, and the fate of the Universe | 10 pages, 3 figures, Accepted for publication in Eur. Phys. J. C | European Physical Journal C (2016) 76: 410 | 10.1140/epjc/s10052-016-4254-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study cosmological dynamics of phantom as well as
non-phantom fields with linear potential in presence of Galileon correction
$(\partial_\mu\phi \partial^\mu\phi) \Box \phi$. We show that the Big Crunch
singularity is delayed compared to the standard case; the delay crucially
depends upon the strengt... | [
{
"created": "Tue, 9 Feb 2016 13:39:42 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2016 09:09:51 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Apr 2016 10:38:44 GMT",
"version": "v3"
},
{
"created": "Fri, 8 Jul 2016 05:14:34 GMT",
"version": "v4"
}
] | 2022-07-20 | [
[
"Shahalam",
"M.",
""
],
[
"Pacif",
"S. K. J.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | In this paper we study cosmological dynamics of phantom as well as non-phantom fields with linear potential in presence of Galileon correction $(\partial_\mu\phi \partial^\mu\phi) \Box \phi$. We show that the Big Crunch singularity is delayed compared to the standard case; the delay crucially depends upon the strength ... |
1512.08280 | Sergey Paston | A.A. Sheykin, S.A. Paston | Classification of global minimal embeddings for nonrotating black holes | LaTeX, 12 pages | Theor. Math. Phys. 185:1 (2015), 1547-1556 | 10.1007/s11232-015-0364-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of the existence of global embeddings of metrics of
spherically symmetric black holes into an ambient space with the minimal
possible dimension. We classify the possible types of embeddings by the type of
realization of the metric symmetry by ambient space symmetries. For the
Schwarzschild, Sc... | [
{
"created": "Sun, 27 Dec 2015 21:46:59 GMT",
"version": "v1"
}
] | 2015-12-29 | [
[
"Sheykin",
"A. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | We consider the problem of the existence of global embeddings of metrics of spherically symmetric black holes into an ambient space with the minimal possible dimension. We classify the possible types of embeddings by the type of realization of the metric symmetry by ambient space symmetries. For the Schwarzschild, Schw... |
1303.5566 | Remo Garattini | Remo Garattini and Francisco S. N. Lobo | Gravity's Rainbow induces Topology Change | Updated to match published version. The "Topology Change" section has
been revised introducing a connection with the "Ricci flow". RevTeX4, 13
Pages | Eur.Phys.J.C74:2884,2014 | 10.1140/epjc/s10052-014-2884-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the possibility that quantum fluctuations induce a
topology change, in the context of Gravity's Rainbow. A semi-classical approach
is adopted, where the graviton one-loop contribution to a classical energy in a
background spacetime is computed through a variational approach with Gaussian
tria... | [
{
"created": "Fri, 22 Mar 2013 10:06:04 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2014 10:48:00 GMT",
"version": "v2"
}
] | 2014-08-21 | [
[
"Garattini",
"Remo",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this work, we explore the possibility that quantum fluctuations induce a topology change, in the context of Gravity's Rainbow. A semi-classical approach is adopted, where the graviton one-loop contribution to a classical energy in a background spacetime is computed through a variational approach with Gaussian trial ... |
0901.3226 | Shinji Tsujikawa | Shinji Tsujikawa, Takashi Tamaki, Reza Tavakol | Chameleon scalar fields in relativistic gravitational backgrounds | 17 pages, 8 figures | JCAP 0905:020,2009 | 10.1088/1475-7516/2009/05/020 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the field profile of a scalar field $\phi$ that couples to a matter
fluid (dubbed a chameleon field) in the relativistic gravitational background
of a spherically symmetric spacetime. Employing a linear expansion in terms of
the gravitational potential $\Phi_c$ at the surface of a compact object with a
const... | [
{
"created": "Wed, 21 Jan 2009 10:34:13 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Apr 2009 15:49:03 GMT",
"version": "v2"
}
] | 2010-04-14 | [
[
"Tsujikawa",
"Shinji",
""
],
[
"Tamaki",
"Takashi",
""
],
[
"Tavakol",
"Reza",
""
]
] | We study the field profile of a scalar field $\phi$ that couples to a matter fluid (dubbed a chameleon field) in the relativistic gravitational background of a spherically symmetric spacetime. Employing a linear expansion in terms of the gravitational potential $\Phi_c$ at the surface of a compact object with a constan... |
gr-qc/0309114 | Yuri Obukhov | Yuri N. Obukhov | Black hole hydrodynamics | Revtex, 8 pages, no figures | null | null | null | gr-qc | null | The curved geometry of a spacetime manifold arises as a solution of
Einstein's gravitational field equation. We show that the metric of a
spherically symmetric gravitational field configuration can be viewed as an
optical metric created by the moving material fluid with nontrivial dielectric
and magnetic properties. ... | [
{
"created": "Tue, 23 Sep 2003 19:58:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Obukhov",
"Yuri N.",
""
]
] | The curved geometry of a spacetime manifold arises as a solution of Einstein's gravitational field equation. We show that the metric of a spherically symmetric gravitational field configuration can be viewed as an optical metric created by the moving material fluid with nontrivial dielectric and magnetic properties. Su... |
2104.07721 | Mohsen Fathi | Mohsen Fathi, Marco Olivares, J.R. Villanueva | Analytical study of light ray trajectories in Kerr spacetime in the
presence of an inhomogeneous anisotropic plasma | 22 pages, 32 figures, to appear in EPJC | Eur. Phys. J. C (2021) 81:987 | 10.1140/epjc/s10052-021-09787-1 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the exact solutions to the equations of motion that govern the
light ray trajectories as they travel in a Kerr black hole's exterior that is
considered to be filled with an inhomogeneous and anisotropic plasmic medium.
This is approached by characterizing the plasma through conceiving a radial and
an ang... | [
{
"created": "Thu, 15 Apr 2021 19:11:29 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Apr 2021 21:07:11 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Apr 2021 15:30:42 GMT",
"version": "v3"
},
{
"created": "Tue, 31 Aug 2021 15:49:48 GMT",
"version": "v4"
},
{
"c... | 2021-11-11 | [
[
"Fathi",
"Mohsen",
""
],
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"J. R.",
""
]
] | We calculate the exact solutions to the equations of motion that govern the light ray trajectories as they travel in a Kerr black hole's exterior that is considered to be filled with an inhomogeneous and anisotropic plasmic medium. This is approached by characterizing the plasma through conceiving a radial and an angul... |
1105.4007 | Kouji Nakamura | Kouji Nakamura | Construction of gauge-invariant variables of linear metric perturbations
on an arbitrary background spacetime | 26 pages, no figure. Compacted version of arXiv:1101.1147v1[gr-qc]
but includes new ingredients; (v2) Title is slightly changed. Some
discussions and references are added. Some typos are corrected | null | 10.1093/ptep/ptt006 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An outline of a proof of the decomposition of linear metric perturbations
into gauge-invariant and gauge-variant parts on the an arbitrary background
spacetime which admits ADM decomposition is discussed. We explicitly construct
the gauge-invariant and gauge-variant parts of the linear metric perturbations
through th... | [
{
"created": "Fri, 20 May 2011 03:25:44 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2013 02:15:27 GMT",
"version": "v2"
}
] | 2016-06-21 | [
[
"Nakamura",
"Kouji",
""
]
] | An outline of a proof of the decomposition of linear metric perturbations into gauge-invariant and gauge-variant parts on the an arbitrary background spacetime which admits ADM decomposition is discussed. We explicitly construct the gauge-invariant and gauge-variant parts of the linear metric perturbations through the ... |
1709.03013 | William J. Cunningham | William J. Cunningham and Dmitri Krioukov | Causal Set Generator and Action Computer | 14 pages, 6 figures. Code may be downloaded at
<https://bitbucket.org/dk-lab/causalsetgenerator> | Comput. Phys. Commun. 233, 123 (2018) | 10.1016/j.cpc.2018.06.008 | null | gr-qc math.NA physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The causal set approach to quantum gravity has gained traction over the past
three decades, but numerical experiments involving causal sets have been
limited to relatively small scales. The software suite presented here provides
a new framework for the generation and study of causal sets. Its efficiency
surpasses pre... | [
{
"created": "Sat, 9 Sep 2017 22:41:10 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Sep 2018 21:56:07 GMT",
"version": "v2"
}
] | 2018-09-17 | [
[
"Cunningham",
"William J.",
""
],
[
"Krioukov",
"Dmitri",
""
]
] | The causal set approach to quantum gravity has gained traction over the past three decades, but numerical experiments involving causal sets have been limited to relatively small scales. The software suite presented here provides a new framework for the generation and study of causal sets. Its efficiency surpasses previ... |
gr-qc/9912092 | Piotr Jaranowski | Thibault Damour, Piotr Jaranowski, and Gerhard Sch\"afer | Dynamical invariants for general relativistic two-body systems at the
third post-Newtonian approximation | REVTeX, 21 pages, submitted to Phys. Rev. D | Phys.Rev.D62:044024,2000 | 10.1103/PhysRevD.62.044024 | null | gr-qc | null | We extract all the invariants (i.e. all the functions which do not depend on
the choice of phase-space coordinates) of the dynamics of two point-masses, at
the third post-Newtonian (3PN) approximation of general relativity. We start by
showing how a contact transformation can be used to reduce the 3PN higher-order
Ha... | [
{
"created": "Tue, 21 Dec 1999 16:26:33 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Damour",
"Thibault",
""
],
[
"Jaranowski",
"Piotr",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | We extract all the invariants (i.e. all the functions which do not depend on the choice of phase-space coordinates) of the dynamics of two point-masses, at the third post-Newtonian (3PN) approximation of general relativity. We start by showing how a contact transformation can be used to reduce the 3PN higher-order Hami... |
1709.03301 | Killian Martineau | Killian Martineau, Aur\'elien Barrau and Julien Grain | A first step towards the inflationary trans-planckian problem treatment
in Loop Quantum Cosmology | 11 pages, 10 figures | null | 10.1142/S0218271818500670 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For most initial conditions, cosmologically relevant physical modes were
trans-planckian at the bounce time, often by many magnitude orders. We improve
the usual loop quantum cosmology calculation of the primordial power spectra --
in the inflationary framework -- by accounting for those trans-planckian
effects throu... | [
{
"created": "Mon, 11 Sep 2017 09:08:52 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jan 2018 09:18:51 GMT",
"version": "v2"
}
] | 2018-05-23 | [
[
"Martineau",
"Killian",
""
],
[
"Barrau",
"Aurélien",
""
],
[
"Grain",
"Julien",
""
]
] | For most initial conditions, cosmologically relevant physical modes were trans-planckian at the bounce time, often by many magnitude orders. We improve the usual loop quantum cosmology calculation of the primordial power spectra -- in the inflationary framework -- by accounting for those trans-planckian effects through... |
2207.10610 | Biswajit Deb | Biswajit Deb, Atri Deshamukhya | Constraining logarithmic $f(R,T)$ model using Dark Energy density
parameter $\Omega_{\Lambda}$ and Hubble parameter $H_0$ | 6 pages, Paper presented in the 23rd International Conference on
General Relativity and Gravitation, 3-8 July, 2022, Beijing organized by
ISGRG | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Of many extended theories of gravity, $f(R,T)$ gravity has gained reasonable
interest in recent times as it provides interesting results in cosmology.
Logarithmic corrections in modified theories of gravity has been studied
extensively. In this work, we considered logarithmic correction to the trace
term T and take t... | [
{
"created": "Thu, 21 Jul 2022 17:06:52 GMT",
"version": "v1"
}
] | 2022-07-22 | [
[
"Deb",
"Biswajit",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | Of many extended theories of gravity, $f(R,T)$ gravity has gained reasonable interest in recent times as it provides interesting results in cosmology. Logarithmic corrections in modified theories of gravity has been studied extensively. In this work, we considered logarithmic correction to the trace term T and take the... |
2401.13894 | Yen-Kheng Lim PhD | Yen-Kheng Lim and Zhi Cheng Yeo | Energies and angular momenta of periodic Schwarzschild geodesics | 28 pages, 11 figures | Phys. Rev. D 109, 024037 (2024) | 10.1103/PhysRevD.109.024037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider physical parameters of Levin and Perez-Giz's `periodic table of
orbits' around the Schwarzschild black hole, where each periodic orbit is
classified according to three integers $(z,w,v)$. In particular, we chart its
distribution in terms of its angular momenta $L$ and energy $E$. In the
$(L,E)$-parameter ... | [
{
"created": "Thu, 25 Jan 2024 02:23:06 GMT",
"version": "v1"
}
] | 2024-01-26 | [
[
"Lim",
"Yen-Kheng",
""
],
[
"Yeo",
"Zhi Cheng",
""
]
] | We consider physical parameters of Levin and Perez-Giz's `periodic table of orbits' around the Schwarzschild black hole, where each periodic orbit is classified according to three integers $(z,w,v)$. In particular, we chart its distribution in terms of its angular momenta $L$ and energy $E$. In the $(L,E)$-parameter sp... |
2204.11738 | Barak Rom | Barak Rom, Re'em Sari | Extreme Mass-Ratio Binary Black Hole Merger: Characteristics of the
Test-Particle Limit | 11 pages, 7 figures. Accepted for publication in Physical Review D | Phys. Rev. D 106, 104040 (2022) | 10.1103/PhysRevD.106.104040 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study binary black hole mergers in the extreme mass-ratio limit. We
determine the energy, angular momentum, and linear momentum of the post-merger,
remnant black hole. Unlike previous works, we perform our analysis directly in
the test-particle limit by solving the Regge-Wheeler-Zerilli wave equation with
a source... | [
{
"created": "Mon, 25 Apr 2022 15:50:27 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2022 14:02:30 GMT",
"version": "v2"
}
] | 2022-11-22 | [
[
"Rom",
"Barak",
""
],
[
"Sari",
"Re'em",
""
]
] | We study binary black hole mergers in the extreme mass-ratio limit. We determine the energy, angular momentum, and linear momentum of the post-merger, remnant black hole. Unlike previous works, we perform our analysis directly in the test-particle limit by solving the Regge-Wheeler-Zerilli wave equation with a source t... |
gr-qc/0002024 | Merced Montesinos | Merced Montesinos and Carlo Rovelli | Statistical mechanics of generally covariant quantum theories: A
Boltzmann-like approach | 18 pages, no figures, Latex file. Revised version. Accepted for
publication in Class. Quantum Grav | Class.Quant.Grav. 18 (2001) 555-569 | 10.1088/0264-9381/18/3/314 | null | gr-qc hep-th quant-ph | null | We study the possibility of applying statistical mechanics to generally
covariant quantum theories with a vanishing Hamiltonian. We show that (under
certain appropiate conditions) this makes sense, in spite of the absence of a
notion of energy and external time. We consider a composite system formed by a
large number... | [
{
"created": "Fri, 4 Feb 2000 17:39:55 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jan 2001 18:06:19 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Montesinos",
"Merced",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We study the possibility of applying statistical mechanics to generally covariant quantum theories with a vanishing Hamiltonian. We show that (under certain appropiate conditions) this makes sense, in spite of the absence of a notion of energy and external time. We consider a composite system formed by a large number o... |
1705.01048 | Srimanta Banerjee | Srimanta Banerjee, Swapnil Shankar and Tejinder P. Singh | Constraints on Modified Gravity Models from White Dwarfs | 27 pages, 22 figures, 1 Table; Matches the version published in JCAP | JCAP 10 (2017) 004 | 10.1088/1475-7516/2017/10/004 | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theories can introduce modifications to the Poisson equation
in the Newtonian limit. As a result, we expect to see interesting features of
these modifications inside stellar objects. White dwarf stars are one of the
most well studied stars in stellar astrophysics. We explore the effect of
modified gr... | [
{
"created": "Tue, 2 May 2017 16:15:27 GMT",
"version": "v1"
},
{
"created": "Fri, 26 May 2017 13:42:43 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Oct 2017 02:42:10 GMT",
"version": "v3"
}
] | 2017-10-06 | [
[
"Banerjee",
"Srimanta",
""
],
[
"Shankar",
"Swapnil",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | Modified gravity theories can introduce modifications to the Poisson equation in the Newtonian limit. As a result, we expect to see interesting features of these modifications inside stellar objects. White dwarf stars are one of the most well studied stars in stellar astrophysics. We explore the effect of modified grav... |
2205.06867 | Cenalo Vaz | Cenalo Vaz | Proper time Quantization of a Thin Shell | This essay was selected for the First Award in the 2022 Gravity
Research Foundation Essay Competition. arXiv admin note: substantial text
overlap with arXiv:2204.02435 | null | 10.1142/S0218271822410012 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | "Time" has different meanings in classical general relativity and in quantum
theory. While all choices of a time function yield the same local classical
geometries, quantum theories built on different time functions are not
unitarily equivalent. This incompatibility is most vivid in model systems for
which exact quan... | [
{
"created": "Fri, 13 May 2022 19:54:10 GMT",
"version": "v1"
}
] | 2022-07-06 | [
[
"Vaz",
"Cenalo",
""
]
] | "Time" has different meanings in classical general relativity and in quantum theory. While all choices of a time function yield the same local classical geometries, quantum theories built on different time functions are not unitarily equivalent. This incompatibility is most vivid in model systems for which exact quantu... |
1512.07835 | Winfried Zimdahl | Rodrigo M. Barbosa, G. Eddy, I. Chirinos, Winfried Zimdahl, Oliver F.
Piattella | Cosmic bulk viscosity through backreaction | 18 pages, 6 figures, comments and references added, accepted for
publication in GRG | null | 10.1007/s10714-016-2043-4 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an effective viscous pressure as the result of a backreaction of
inhomogeneities within Buchert's formalism. The use of an effective metric with
a time-dependent curvature radius allows us to calculate the luminosity
distance of the backreaction model. This quantity is different from its
counterpart for a... | [
{
"created": "Thu, 24 Dec 2015 15:12:50 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Mar 2016 12:30:48 GMT",
"version": "v2"
}
] | 2016-04-13 | [
[
"Barbosa",
"Rodrigo M.",
""
],
[
"Eddy",
"G.",
""
],
[
"Chirinos",
"I.",
""
],
[
"Zimdahl",
"Winfried",
""
],
[
"Piattella",
"Oliver F.",
""
]
] | We consider an effective viscous pressure as the result of a backreaction of inhomogeneities within Buchert's formalism. The use of an effective metric with a time-dependent curvature radius allows us to calculate the luminosity distance of the backreaction model. This quantity is different from its counterpart for a "... |
gr-qc/0512084 | Yi Ling | Yi Ling, Xiang Li and Hongbao Zhang | Thermodynamics of modified black holes from gravity's rainbow | 3 pages, Revtex | Mod.Phys.Lett.A22:2749-2756,2007 | 10.1142/S0217732307022931 | null | gr-qc | null | We study the thermodynamics of modified black holes proposed in the context
of gravity's rainbow. A notion of intrinsic temperature and entropy for these
black holes is introduced. In particular for a specific class of modified
Schwarzschild solutions, their temperature and entropy are obtained and
compared with thos... | [
{
"created": "Wed, 14 Dec 2005 13:15:41 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ling",
"Yi",
""
],
[
"Li",
"Xiang",
""
],
[
"Zhang",
"Hongbao",
""
]
] | We study the thermodynamics of modified black holes proposed in the context of gravity's rainbow. A notion of intrinsic temperature and entropy for these black holes is introduced. In particular for a specific class of modified Schwarzschild solutions, their temperature and entropy are obtained and compared with those ... |
2102.00478 | Giampiero Esposito Dr. | Roberto Niardi, Giampiero Esposito, Francesco Tramontano | Divergent part of the stress-energy tensor for Maxwell's theory in
curved space-time: a systematic derivation | 42 pages, Latex | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper the Feynman Green function for Maxwell's theory in curved
space-time is studied by using the Fock-Schwinger-DeWitt asymptotic expansion;
the point-splitting method is then applied, since it is a valuable tool for
regularizing divergent observables. Among these, the stress-energy tensor is
expressed in t... | [
{
"created": "Sun, 31 Jan 2021 16:14:55 GMT",
"version": "v1"
}
] | 2021-02-02 | [
[
"Niardi",
"Roberto",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Tramontano",
"Francesco",
""
]
] | In this paper the Feynman Green function for Maxwell's theory in curved space-time is studied by using the Fock-Schwinger-DeWitt asymptotic expansion; the point-splitting method is then applied, since it is a valuable tool for regularizing divergent observables. Among these, the stress-energy tensor is expressed in ter... |
2403.09966 | Rakshak Adhikari | Rakshak Adhikari, Govind Menon, Mikhail V. Medvedev | Force-free Electromagnetic Configurations in FLRW Geometry | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Force-free electrodynamics is the theoretical paradigm used to describe
electromagnetic fields in a region where the inertia of plasma is negligible
compared to the strength of the electromagnetic field. While these fields are
studied extensively around accreting black holes in an attempt to describe
energy extractio... | [
{
"created": "Fri, 15 Mar 2024 02:09:39 GMT",
"version": "v1"
}
] | 2024-03-18 | [
[
"Adhikari",
"Rakshak",
""
],
[
"Menon",
"Govind",
""
],
[
"Medvedev",
"Mikhail V.",
""
]
] | Force-free electrodynamics is the theoretical paradigm used to describe electromagnetic fields in a region where the inertia of plasma is negligible compared to the strength of the electromagnetic field. While these fields are studied extensively around accreting black holes in an attempt to describe energy extraction,... |
2312.02295 | Alexander Grant | Alexander M. Grant and Keefe Mitman | Higher Memory Effects in Numerical Simulations of Binary Black Hole
Mergers | 14 pages, 4 figures; v2: added references (including to public source
code); v3: matches published version | Class. Quant. Grav. 41 175003 (2024) | 10.1088/1361-6382/ad5d46 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational memory effects are predictions of general relativity that are
characterized by an observable effect that persists after the passage of
gravitational waves. In recent years, they have garnered particular interest,
both due to their connection to asymptotic symmetries and soft theorems and
because their o... | [
{
"created": "Mon, 4 Dec 2023 19:18:51 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2024 21:03:07 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jul 2024 17:24:23 GMT",
"version": "v3"
}
] | 2024-07-30 | [
[
"Grant",
"Alexander M.",
""
],
[
"Mitman",
"Keefe",
""
]
] | Gravitational memory effects are predictions of general relativity that are characterized by an observable effect that persists after the passage of gravitational waves. In recent years, they have garnered particular interest, both due to their connection to asymptotic symmetries and soft theorems and because their obs... |
2208.07874 | Hamid Shabani | Hamid Shabani, Amir Hadi Ziaie, Hooman Moradpour | Einstein Static Universe and its Stability in Generalized Rastall
Gravity | 12 pages, 4 figures | Ann. Phys. 444 (2022) 169058 | 10.1016/j.aop.2022.169058 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Einstein static (ES) state is a good candidate for describing the very
early universe in terms of a regular cosmological model in which the Big Bang
singularity is avoided. In the present study we propose an ES solution in the
framework of generalized Rastall gravity (GRG), a modified version of original
Rastall ... | [
{
"created": "Tue, 16 Aug 2022 06:04:28 GMT",
"version": "v1"
}
] | 2022-08-18 | [
[
"Shabani",
"Hamid",
""
],
[
"Ziaie",
"Amir Hadi",
""
],
[
"Moradpour",
"Hooman",
""
]
] | The Einstein static (ES) state is a good candidate for describing the very early universe in terms of a regular cosmological model in which the Big Bang singularity is avoided. In the present study we propose an ES solution in the framework of generalized Rastall gravity (GRG), a modified version of original Rastall th... |
0709.2109 | Dmitriy Pak | H. Niu and D. G. Pak | Non-Topological Gauss-Bonnet type model of gravity with torsion | 9 pages, no figures, minor corrections, text improved | null | null | null | gr-qc | null | A non-topological Lorentz gauge model of gravity with torsion based on
Gauss-Bonnet type Lagrangian is considered. The Lagrangian differs from the
Lovelock term in four-dimensional space-time and has a number of interesting
features. We demonstrate that the model admits a propagating torsion unlike the
case of the to... | [
{
"created": "Thu, 13 Sep 2007 16:10:29 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Oct 2007 12:10:59 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Mar 2008 12:41:55 GMT",
"version": "v3"
}
] | 2008-03-06 | [
[
"Niu",
"H.",
""
],
[
"Pak",
"D. G.",
""
]
] | A non-topological Lorentz gauge model of gravity with torsion based on Gauss-Bonnet type Lagrangian is considered. The Lagrangian differs from the Lovelock term in four-dimensional space-time and has a number of interesting features. We demonstrate that the model admits a propagating torsion unlike the case of the topo... |
gr-qc/9901017 | Guendel Eduardo | E.I.Guendelman | Scale invariance, new inflation and decaying Lambda terms | 12 pages | Mod.Phys.Lett. A14 (1999) 1043-1052 | 10.1142/S0217732399001103 | null | gr-qc | null | Realizations of scale invariance are studied in the context of a
gravitational theory where the action (in the first order formalism) is of the
form $S = \int L_{1} \Phi d^{4}x$ + $\int L_{2}\sqrt{-g}d^{4}x$ where $\Phi$ is
a density built out of degrees of freedom, the "measure fields" independent of
$g_{\mu\nu}$ an... | [
{
"created": "Thu, 7 Jan 1999 12:55:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Guendelman",
"E. I.",
""
]
] | Realizations of scale invariance are studied in the context of a gravitational theory where the action (in the first order formalism) is of the form $S = \int L_{1} \Phi d^{4}x$ + $\int L_{2}\sqrt{-g}d^{4}x$ where $\Phi$ is a density built out of degrees of freedom, the "measure fields" independent of $g_{\mu\nu}$ and ... |
2105.05630 | Oliver Long | Oliver Long and Leor Barack | Time-domain metric reconstruction for hyperbolic scattering | 28 pages, 11 figures; v3 corrected typo in Eq. (103) | Phys. Rev. D 104, 024014 (2021) | 10.1103/PhysRevD.104.024014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Self-force methods can be applied in calculations of the scatter angle in
two-body hyperbolic encounters, working order by order in the mass ratio
(assumed small) but with no recourse to a weak-field approximation. This, in
turn, can inform ongoing efforts to construct an accurate model of the
general-relativistic bi... | [
{
"created": "Wed, 12 May 2021 12:58:28 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jun 2021 14:38:08 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Sep 2021 10:26:55 GMT",
"version": "v3"
},
{
"created": "Mon, 21 Feb 2022 10:22:28 GMT",
"version": "v4"
}
] | 2022-02-22 | [
[
"Long",
"Oliver",
""
],
[
"Barack",
"Leor",
""
]
] | Self-force methods can be applied in calculations of the scatter angle in two-body hyperbolic encounters, working order by order in the mass ratio (assumed small) but with no recourse to a weak-field approximation. This, in turn, can inform ongoing efforts to construct an accurate model of the general-relativistic bina... |
1005.2685 | Viktor Toth | J. W. Moffat and V. T. Toth | Can Modified Gravity (MOG) explain the speeding Bullet (Cluster)? | 4 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply our scalar-tensor-vector (STVG) modified gravity theory (MOG) to
calculate the infall velocities of the two clusters constituting the Bullet
Cluster 1E0657-06. In the absence of an applicable two-body solution to the MOG
field equations, we adopt an approximate acceleration formula based on the
spherically s... | [
{
"created": "Sat, 15 May 2010 16:07:00 GMT",
"version": "v1"
}
] | 2010-05-18 | [
[
"Moffat",
"J. W.",
""
],
[
"Toth",
"V. T.",
""
]
] | We apply our scalar-tensor-vector (STVG) modified gravity theory (MOG) to calculate the infall velocities of the two clusters constituting the Bullet Cluster 1E0657-06. In the absence of an applicable two-body solution to the MOG field equations, we adopt an approximate acceleration formula based on the spherically sym... |
gr-qc/0408034 | T. Padmanabhan | L.Sriramkumar, T.Padmanabhan | Initial state of matter fields and trans-Planckian physics: Can CMB
observations disentangle the two? | revtex4; 17 pages | Phys.Rev. D71 (2005) 103512 | 10.1103/PhysRevD.71.103512 | null | gr-qc astro-ph hep-th | null | The standard, scale-invariant, inflationary perturbation spectrum will be
modified if the effects of trans-Planckian physics are incorporated into the
dynamics of the matter field in a phenomenological manner, say, by the
modification of the dispersion relation. The spectrum also changes if we retain
the standard dyn... | [
{
"created": "Thu, 12 Aug 2004 11:09:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sriramkumar",
"L.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | The standard, scale-invariant, inflationary perturbation spectrum will be modified if the effects of trans-Planckian physics are incorporated into the dynamics of the matter field in a phenomenological manner, say, by the modification of the dispersion relation. The spectrum also changes if we retain the standard dynam... |
2309.06376 | Tuhina Ghorui | Tuhina Ghorui, Prabir Rudra, Farook Rahaman | Reconstruction of $f(T,\mathcal{T})$ Lagrangian for various cosmological
scenarios | 23 pages, 4 figures | Physics of the Dark Universe, 42 (2023) 101352 | 10.1016/j.dark.2023.101352 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we explore a reconstruction scheme in the background of the
$f(T,\mathcal{T})$ gravity theory for different cosmological scenarios, where
$T$ is the scalar torsion and $\mathcal{T}$ is the trace of the energy-momentum
tensor. Using the reconstruction technique $f(T, \mathcal{T})$ Lagrangian is
construc... | [
{
"created": "Sat, 9 Sep 2023 08:51:41 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Oct 2023 14:28:25 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Ghorui",
"Tuhina",
""
],
[
"Rudra",
"Prabir",
""
],
[
"Rahaman",
"Farook",
""
]
] | In this paper, we explore a reconstruction scheme in the background of the $f(T,\mathcal{T})$ gravity theory for different cosmological scenarios, where $T$ is the scalar torsion and $\mathcal{T}$ is the trace of the energy-momentum tensor. Using the reconstruction technique $f(T, \mathcal{T})$ Lagrangian is constructe... |
gr-qc/0603056 | Christian Koenigsdoerffer | Christian Koenigsdoerffer, Achamveedu Gopakumar | Phasing of gravitational waves from inspiralling eccentric binaries at
the third-and-a-half post-Newtonian order | 22 pages including 2 figures; submitted to PRD | Phys.Rev.D73:124012,2006 | 10.1103/PhysRevD.73.124012 | null | gr-qc astro-ph | null | We obtain an efficient description for the dynamics of nonspinning compact
binaries moving in inspiralling eccentric orbits to implement the phasing of
gravitational waves from such binaries at the 3.5 post-Newtonian (PN) order.
Our computation heavily depends on the phasing formalism, presented in [T.
Damour, A. Gop... | [
{
"created": "Tue, 14 Mar 2006 18:39:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Koenigsdoerffer",
"Christian",
""
],
[
"Gopakumar",
"Achamveedu",
""
]
] | We obtain an efficient description for the dynamics of nonspinning compact binaries moving in inspiralling eccentric orbits to implement the phasing of gravitational waves from such binaries at the 3.5 post-Newtonian (PN) order. Our computation heavily depends on the phasing formalism, presented in [T. Damour, A. Gopak... |
gr-qc/0408074 | Daniel Green | Daniel Green and William G. Unruh | Difficulties with Recollapsing models in Closed Isotropic Loop Quantum
Cosmology | 10 pages, accepted to Phys. Rev. D | Phys.Rev. D70 (2004) 103502 | 10.1103/PhysRevD.70.103502 | null | gr-qc | null | The use of techniques from loop quantum gravity for cosmological models may
solve some difficult problems in quantum cosmology. The solutions under a
number of circumstances have been well studied. We will analyse the behaviour
of solutions in the closed model, focusing on the behaviour of a universe
containing a mas... | [
{
"created": "Sun, 22 Aug 2004 23:26:46 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 2004 05:40:52 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Nov 2004 18:17:39 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Green",
"Daniel",
""
],
[
"Unruh",
"William G.",
""
]
] | The use of techniques from loop quantum gravity for cosmological models may solve some difficult problems in quantum cosmology. The solutions under a number of circumstances have been well studied. We will analyse the behaviour of solutions in the closed model, focusing on the behaviour of a universe containing a massl... |
0902.2443 | Sunil Maharaj | S. D. Maharaj, S. Thirukkanesh | Some new static charged spheres | 14 pages, To appear in Nonlinear Analysis RWA | Nonlinear Analysis: RWA 10:3396-3403, 2009 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new exact solutions for the Einstein-Maxwell system in static
spherically symmetric interior spacetimes. For a particular form of the
gravitational potentials and the electric field intensity, it is possible to
integrate the system in closed form. For specific parameter values it is
possible to find new ex... | [
{
"created": "Sat, 14 Feb 2009 09:03:14 GMT",
"version": "v1"
}
] | 2009-10-16 | [
[
"Maharaj",
"S. D.",
""
],
[
"Thirukkanesh",
"S.",
""
]
] | We present new exact solutions for the Einstein-Maxwell system in static spherically symmetric interior spacetimes. For a particular form of the gravitational potentials and the electric field intensity, it is possible to integrate the system in closed form. For specific parameter values it is possible to find new exac... |
2402.00844 | Saulo Pereira H | A. M. Vicente, J. F. Jesus and S. H. Pereira | Kinematic reconstruction of torsion as dark energy in Friedmann
cosmology | 19 pages, 6 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effects of torsion of space-time in the expansion
of the universe as a candidate to dark energy. The analysis is done by
reconstructing the torsion function along cosmic evolution by using
observational data of Supernovae type Ia and Hubble parameter measurements. We
have used a kinematic m... | [
{
"created": "Thu, 1 Feb 2024 18:34:32 GMT",
"version": "v1"
}
] | 2024-02-02 | [
[
"Vicente",
"A. M.",
""
],
[
"Jesus",
"J. F.",
""
],
[
"Pereira",
"S. H.",
""
]
] | In this paper we study the effects of torsion of space-time in the expansion of the universe as a candidate to dark energy. The analysis is done by reconstructing the torsion function along cosmic evolution by using observational data of Supernovae type Ia and Hubble parameter measurements. We have used a kinematic mod... |
0712.3934 | Gerhard Forst | G. Forst | A critical analysis of the GP-B mission. I: on the impossibility of a
reliable measurement of the gravitomagnetic precession of the GP-B gyroscopes | This submission has been removed because 'G. Forst' is an apparent
pseudonym, in violation of arXiv policies | null | null | null | gr-qc | null | This submission has been removed because 'G. Forst' is an apparent pseudonym,
in violation of arXiv policies.
| [
{
"created": "Sun, 23 Dec 2007 16:59:42 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jan 2008 19:42:51 GMT",
"version": "v2"
}
] | 2014-02-14 | [
[
"Forst",
"G.",
""
]
] | This submission has been removed because 'G. Forst' is an apparent pseudonym, in violation of arXiv policies. |
1407.1504 | Cristina Blaga | Cristina Blaga | Timelike geodesics around a charged spherically symmetric dilaton black
hole | 10 pages, 16 figures | Serb. Astron. J, vol. 190(2015), 41-48 | 10.2298/SAJ1590041B | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the timelike geodesics around a spherically symmetric
charged dilaton black hole. The trajectories around the black hole are
classified using the effective potential of a free test particle. This
qualitative approach enables us to determine the type of the orbit described by
the test particle w... | [
{
"created": "Sun, 6 Jul 2014 14:53:55 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jul 2014 18:28:56 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Jul 2015 14:46:04 GMT",
"version": "v3"
}
] | 2015-07-21 | [
[
"Blaga",
"Cristina",
""
]
] | In this paper we study the timelike geodesics around a spherically symmetric charged dilaton black hole. The trajectories around the black hole are classified using the effective potential of a free test particle. This qualitative approach enables us to determine the type of the orbit described by the test particle wit... |
2010.04603 | Ibrahim G\"ull\"u | Ibrahim Gullu, S. Habib Mazharimousavi | Black Holes in Double-Logarithmic Nonlinear Electrodynamics | 10 pages, 2 figures | null | 10.1088/1402-4896/ac098f | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The electric and magnetic black hole solutions are found by coupling the
recently introduced nonlinear electrodynamics (NED) model, called "double
logharitmic nonlinear electrodynamics" with cosmological Einstein gravity. The
solutions become Reissner-Nordstrom (RN) black hole in the weak field limit and
asymptotical... | [
{
"created": "Fri, 9 Oct 2020 14:29:53 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Gullu",
"Ibrahim",
""
],
[
"Mazharimousavi",
"S. Habib",
""
]
] | The electric and magnetic black hole solutions are found by coupling the recently introduced nonlinear electrodynamics (NED) model, called "double logharitmic nonlinear electrodynamics" with cosmological Einstein gravity. The solutions become Reissner-Nordstrom (RN) black hole in the weak field limit and asymptotically... |
1712.10012 | Jorge L. Fuentes | Andrew J. Wren, Jorge L. Fuentes and Karim A. Malik | Gravitational waves in a flat radiation-matter universe including
anisotropic stress | 14 pages, 7 figures, 2 appendices. Mathematica notebook available
from Github TBA | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present novel analytical solutions for linear-order gravitational waves or
tensor perturbations in a flat Friedmann-Robertson-Walker universe containing
two perfect fluids, radiation and pressureless dust, and allowing for neutrino
anisotropic stress. One of the results is applicable to any sub-horizon
gravitation... | [
{
"created": "Tue, 26 Dec 2017 21:15:21 GMT",
"version": "v1"
}
] | 2018-01-01 | [
[
"Wren",
"Andrew J.",
""
],
[
"Fuentes",
"Jorge L.",
""
],
[
"Malik",
"Karim A.",
""
]
] | We present novel analytical solutions for linear-order gravitational waves or tensor perturbations in a flat Friedmann-Robertson-Walker universe containing two perfect fluids, radiation and pressureless dust, and allowing for neutrino anisotropic stress. One of the results is applicable to any sub-horizon gravitational... |
gr-qc/9802032 | Wang Bin | Bin Wang, Ru-Keng Su, P.K.N.Yu and E.C.M.Young | Can nonextremal Reissner-Nordstrom black hole become extremal by
assimilating infalling charged particle and shell? | 6 pages, Latex version, accepted for publication on Phys.Rev.D | Phys.Rev. D57 (1998) 5284-5286 | 10.1103/PhysRevD.57.5284 | null | gr-qc | null | By using the gedanken experiments suggested by Bekenstein and Rosenzweig, we
have shown that nonextremal Reissner-Nordstrom black hole cannot turn into
extremal one by assimilating infalling charged particle and charged spherical
shell.
| [
{
"created": "Mon, 16 Feb 1998 01:21:24 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Wang",
"Bin",
""
],
[
"Su",
"Ru-Keng",
""
],
[
"Yu",
"P. K. N.",
""
],
[
"Young",
"E. C. M.",
""
]
] | By using the gedanken experiments suggested by Bekenstein and Rosenzweig, we have shown that nonextremal Reissner-Nordstrom black hole cannot turn into extremal one by assimilating infalling charged particle and charged spherical shell. |
2312.14258 | Francisco A. Brito | J. A. V. Campos, M. A. Anacleto, F. A. Brito, E. Passos | Absorption, scattering, quasinormal modes and shadow by canonical
acoustic black holes in Lorentz-violating background | Latex, 18 pages, 11 figures; version to appear in General Relativity
and Gravitation | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we study the scattering for a black hole described by
the canonical acoustic metric with Lorentz violation using asymptotic and
numerical methods. In this scenario, we also check the effects of quasinormal
modes and the acoustic shadow radius. In the eikonal limit the relationship
between the sha... | [
{
"created": "Thu, 21 Dec 2023 19:19:57 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2024 03:06:29 GMT",
"version": "v2"
}
] | 2024-06-12 | [
[
"Campos",
"J. A. V.",
""
],
[
"Anacleto",
"M. A.",
""
],
[
"Brito",
"F. A.",
""
],
[
"Passos",
"E.",
""
]
] | In the present work, we study the scattering for a black hole described by the canonical acoustic metric with Lorentz violation using asymptotic and numerical methods. In this scenario, we also check the effects of quasinormal modes and the acoustic shadow radius. In the eikonal limit the relationship between the shado... |
gr-qc/9903051 | Cenalo T. A. Vaz | Cenalo Vaz (Universidade do Algarve) | Canonical Quantization and the Statistical Entropy of the Schwarzschild
Black Hole | 21 pages, PHYZZX macros. The counting of physical states has been
corrected. Revised version to appear in Phys. Rev. D | Phys.Rev. D61 (2000) 064017 | 10.1103/PhysRevD.61.064017 | UATP-01/99 | gr-qc hep-th | null | The canonical quantization of a Schwarzschild black hole yields a picture of
the black hole that is shown to be equivalent to a collection of oscillators
whose density of levels is commensurate with that of the statistical bootstrap
model. Energy eigenstates of definite parity exhibit the Bekenstein mass
spectrum, $M... | [
{
"created": "Sat, 13 Mar 1999 22:32:42 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 1999 11:44:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Vaz",
"Cenalo",
"",
"Universidade do Algarve"
]
] | The canonical quantization of a Schwarzschild black hole yields a picture of the black hole that is shown to be equivalent to a collection of oscillators whose density of levels is commensurate with that of the statistical bootstrap model. Energy eigenstates of definite parity exhibit the Bekenstein mass spectrum, $M \... |
2107.08061 | Anzhong Wang | Shinji Tsujikawa, Chao Zhang, Xiang Zhao, and Anzhong Wang | Odd-parity stability of black holes in Einstein-Aether gravity | Revtex4-1, no tables and figures. The analysis of stability against
the inclined modes is added, and some typos are further corrected. Version to
appear in Phys. Rev. D | Phys. Rev. D 104, 064024 (2021) | 10.1103/PhysRevD.104.064024 | null | gr-qc astro-ph.GA hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In Einstein-Aether theory, we study the stability of black holes against
odd-parity perturbations on a spherically symmetric and static background. For
odd-parity modes, there are two dynamical degrees of freedom arising from the
tensor gravitational sector and Aether vector field. We derive general
conditions under ... | [
{
"created": "Fri, 16 Jul 2021 18:03:16 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Aug 2021 15:28:50 GMT",
"version": "v2"
}
] | 2021-09-15 | [
[
"Tsujikawa",
"Shinji",
""
],
[
"Zhang",
"Chao",
""
],
[
"Zhao",
"Xiang",
""
],
[
"Wang",
"Anzhong",
""
]
] | In Einstein-Aether theory, we study the stability of black holes against odd-parity perturbations on a spherically symmetric and static background. For odd-parity modes, there are two dynamical degrees of freedom arising from the tensor gravitational sector and Aether vector field. We derive general conditions under wh... |
gr-qc/9405024 | null | J.D. Brown and J.W. York | The Path Integral Formulation of Gravitational Thermodynamics | 24 pages, LaTeX. Revised version contains additional remarks in the
introduction and minor corrections | null | null | CTMP/007/NCSU, IFP-UNC-491, TAR-UNC-043 | gr-qc hep-th | null | The first objective of this article is to show that the black hole partition
function can be placed on a firm logical foundation by enclosing the black hole
in a spatially finite "box" or boundary. The presence of the box has the effect
of stabilizing the black hole and yields a system with a positive heat
capacity. ... | [
{
"created": "Mon, 9 May 1994 21:02:34 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 1996 21:19:53 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Brown",
"J. D.",
""
],
[
"York",
"J. W.",
""
]
] | The first objective of this article is to show that the black hole partition function can be placed on a firm logical foundation by enclosing the black hole in a spatially finite "box" or boundary. The presence of the box has the effect of stabilizing the black hole and yields a system with a positive heat capacity. Th... |
1411.7969 | Adrian Ciprian Sporea | Ciprian A. Sporea, Dumitru N. Vulcanov | Using Maple + GRTensorII in teaching basics of General Relativity and
Cosmology | 12 pages, 2 fig. To accepted for publication in Romanian Reports in
Physics (2016) | Rom. Rep. Phys. 68, 29 (2016) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we propose some Maple procedures, for teaching purposes, to
study the basics of General Relativity (GR) and Cosmology. After presenting
some features of GRTensorII, a package specially built to deal with GR, we give
two examples of how one can use these procedures. In the first example we build
the Sc... | [
{
"created": "Fri, 28 Nov 2014 18:34:43 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jan 2016 07:36:07 GMT",
"version": "v2"
}
] | 2016-04-15 | [
[
"Sporea",
"Ciprian A.",
""
],
[
"Vulcanov",
"Dumitru N.",
""
]
] | In this article we propose some Maple procedures, for teaching purposes, to study the basics of General Relativity (GR) and Cosmology. After presenting some features of GRTensorII, a package specially built to deal with GR, we give two examples of how one can use these procedures. In the first example we build the Schw... |
gr-qc/0511106 | Chen Songbai | Songbai Chen, Jiliang Jing | Asymptotic quasinormal modes of a coupled scalar field in the
Gibbons-Maeda dilaton spacetime | 6 pages, 1 figure | Class.Quant.Grav. 22 (2005) 2159-2165 | 10.1088/0264-9381/22/11/016 | null | gr-qc | null | Adopting the monodromy technique devised by Motl and Neitzke, we investigate
analytically the asymptotic quasinormal frequencies of a coupled scalar field
in the Gibbons-Maeda dilaton spacetime. We find that it is described by $
e^{\beta \omega}=-[1+2\cos{(\frac{\sqrt{2\xi+1}}{2} \pi)}]-e^{-\beta_I
\omega}[2+2\cos{(\... | [
{
"created": "Fri, 18 Nov 2005 05:37:59 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | Adopting the monodromy technique devised by Motl and Neitzke, we investigate analytically the asymptotic quasinormal frequencies of a coupled scalar field in the Gibbons-Maeda dilaton spacetime. We find that it is described by $ e^{\beta \omega}=-[1+2\cos{(\frac{\sqrt{2\xi+1}}{2} \pi)}]-e^{-\beta_I \omega}[2+2\cos{(\fr... |
2004.07988 | Andrea Addazi AndAdd | Andrea Addazi | Holographic Naturalness and Cosmological Relaxation | Comments rephrased, main conclusions and results unchanged | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We rediscuss the main Cosmological Problems as illusions originated from our
ignorance of the hidden information holographically stored in {\it vacuo}. The
Cosmological vacuum state is full of a large number of dynamical quantum hairs,
dubbed {\it hairons}, which dominate the Cosmological Entropy. We elaborate on
the... | [
{
"created": "Thu, 16 Apr 2020 23:00:32 GMT",
"version": "v1"
},
{
"created": "Mon, 25 May 2020 14:31:36 GMT",
"version": "v2"
}
] | 2020-05-26 | [
[
"Addazi",
"Andrea",
""
]
] | We rediscuss the main Cosmological Problems as illusions originated from our ignorance of the hidden information holographically stored in {\it vacuo}. The Cosmological vacuum state is full of a large number of dynamical quantum hairs, dubbed {\it hairons}, which dominate the Cosmological Entropy. We elaborate on the C... |
0907.1936 | Elena Novikova Ph.D. | Elena I. Novikova and Igor D. Novikov | Homogeneous singularities inside collapsing wormholes | 10 pages, 5 figures each of which has a),b),c),and d) sub-figures. To
be published in "Physical review. D, Particles, fields, gravitation, and
cosmology" | Phys.Rev.D81:104034,2010 | 10.1103/PhysRevD.81.104034 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze analytically and numerically the origin of the singularity in the
course of the collapse of a wormhole with the exotic scalar field Psi with
negative energy density, and with this field Psi together with the ordered
magnetic field H. We do this under the simplifying assumptions of the spherical
symmetry an... | [
{
"created": "Sat, 11 Jul 2009 03:58:07 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jul 2009 02:23:45 GMT",
"version": "v2"
},
{
"created": "Mon, 31 Aug 2009 23:18:14 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Novikova",
"Elena I.",
""
],
[
"Novikov",
"Igor D.",
""
]
] | We analyze analytically and numerically the origin of the singularity in the course of the collapse of a wormhole with the exotic scalar field Psi with negative energy density, and with this field Psi together with the ordered magnetic field H. We do this under the simplifying assumptions of the spherical symmetry and ... |
1005.4735 | Bernard Schutz | Bernard F Schutz and Franco Ricci | Gravitational Waves, Sources, and Detectors | 82 pages, 9 figures, lecture notes from 1999, not posted to ArXiV at
the time because they exceeded the article/figure size limits | Schutz, B. F.; Ricci, F.: Gravitational Waves, Sources and
Detectors. In: Gravitational Waves, Ciufolini, I, et al, eds. (Institute of
Physics, Bristol, 2001) | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Notes of lectures for graduate students that were given at Lake Como in 1999,
covering the theory of linearized gravitational waves, their sources, and the
prospects at the time for detecting gravitational waves. The lectures remain of
interest for pedagogical reasons, and in particular because they contain a
treatme... | [
{
"created": "Wed, 26 May 2010 05:37:57 GMT",
"version": "v1"
}
] | 2010-05-27 | [
[
"Schutz",
"Bernard F",
""
],
[
"Ricci",
"Franco",
""
]
] | Notes of lectures for graduate students that were given at Lake Como in 1999, covering the theory of linearized gravitational waves, their sources, and the prospects at the time for detecting gravitational waves. The lectures remain of interest for pedagogical reasons, and in particular because they contain a treatment... |
gr-qc/0105053 | A. Latif Choudhury | A. L. Choudhury and Hemant Pendharkar | Wormhole-generated physical universe | 9 pages | Hadronic J. 24 (2001) 275-290 | null | null | gr-qc | null | We constructed a model where the central core of the universe is a modified
Gidding-Strominger wormhole and surrounding the core is a Robertson-Walker
Universe with k=0. They are separated by a thin wall which does not allow the
content of the inner core to travel to the outer universe. But this wall allows
the press... | [
{
"created": "Tue, 15 May 2001 20:55:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choudhury",
"A. L.",
""
],
[
"Pendharkar",
"Hemant",
""
]
] | We constructed a model where the central core of the universe is a modified Gidding-Strominger wormhole and surrounding the core is a Robertson-Walker Universe with k=0. They are separated by a thin wall which does not allow the content of the inner core to travel to the outer universe. But this wall allows the pressur... |
1908.09293 | Matti Raasakka | Matti Raasakka | Spacetime granularity from finite-dimensionality of local observable
algebras | 16 pages; changes to v3: title modified, multiple references added,
minor changes to the text | Class. Quantum Grav. 37, 045014 (2020) | 10.1088/1361-6382/ab5eb0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are important indications that nature may be locally
finite-dimensional, i.e., that any spatially bounded subsystem can be described
by a finite-dimensional local observable algebra. Motivated by these ideas, we
show that operational spacetime topology is described by an atomistic Boolean
algebra if (i) local o... | [
{
"created": "Sun, 25 Aug 2019 10:02:30 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Sep 2019 09:09:03 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Nov 2019 20:49:41 GMT",
"version": "v3"
}
] | 2020-01-28 | [
[
"Raasakka",
"Matti",
""
]
] | There are important indications that nature may be locally finite-dimensional, i.e., that any spatially bounded subsystem can be described by a finite-dimensional local observable algebra. Motivated by these ideas, we show that operational spacetime topology is described by an atomistic Boolean algebra if (i) local obs... |
1711.00479 | Carlos Molina Mendes | A. F. Cardona and C. Molina | Quasinormal modes of generalized P\"oschl-Teller potentials | 14 pages, 2 figures. Accepted for publication in Classical and
Quantum Gravity | Class. Quantum Grav. 34 (2017) 245002 | 10.1088/1361-6382/aa9428 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using algebraic techniques we obtain quasinormal modes and frequencies
associated to generalized forms of the scattering P\"oschl-Teller potential.
This approach is based on the association of the corresponding equations of
motion with Casimir invariants of differential representations of the Lie
algebra sl(2). In th... | [
{
"created": "Wed, 1 Nov 2017 18:00:07 GMT",
"version": "v1"
}
] | 2017-11-21 | [
[
"Cardona",
"A. F.",
""
],
[
"Molina",
"C.",
""
]
] | Using algebraic techniques we obtain quasinormal modes and frequencies associated to generalized forms of the scattering P\"oschl-Teller potential. This approach is based on the association of the corresponding equations of motion with Casimir invariants of differential representations of the Lie algebra sl(2). In the ... |
2003.09227 | Bobir Toshmatov | Bobir Toshmatov, Ozodbek Rahimov, Bobomurat Ahmedov, Daniele
Malafarina | Motion of spinning particles in non asymptotically flat spacetimes | 10 pages, 5 figures, 4 tables | Eur. Phys. J. C, 80 (2020) 675 | 10.1140/epjc/s10052-020-8254-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The assumption of asymptotic flatness for isolated astrophysical bodies may
be considered an approximation when one considers a cosmological context where
a cosmological constant or vacuum energy is present. In this framework we study
the motion of spinning particles in static, spherically symmetric and
asymptoticall... | [
{
"created": "Fri, 20 Mar 2020 12:35:57 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2020 09:01:48 GMT",
"version": "v2"
}
] | 2020-07-29 | [
[
"Toshmatov",
"Bobir",
""
],
[
"Rahimov",
"Ozodbek",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Malafarina",
"Daniele",
""
]
] | The assumption of asymptotic flatness for isolated astrophysical bodies may be considered an approximation when one considers a cosmological context where a cosmological constant or vacuum energy is present. In this framework we study the motion of spinning particles in static, spherically symmetric and asymptotically ... |
gr-qc/0310076 | Graham Hall | G.S. Hall and D.P. Lonie | Holonomy groups and spacetimes | Latex, 14 pages, no figure | Class.Quant.Grav.17:1369-1382,2000 | 10.1088/0264-9381/17/6/304 | null | gr-qc | null | A study is made of the possible holonomy group types of a space-time for
which the energy-momentum tensor corresponds to a null or non-null
electromagnetic field, a perfect fluid or a massive scalar field. The case of
an Einstein space is also included. The techniques developed are also applied
to vacuum and conforma... | [
{
"created": "Wed, 15 Oct 2003 09:21:05 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Hall",
"G. S.",
""
],
[
"Lonie",
"D. P.",
""
]
] | A study is made of the possible holonomy group types of a space-time for which the energy-momentum tensor corresponds to a null or non-null electromagnetic field, a perfect fluid or a massive scalar field. The case of an Einstein space is also included. The techniques developed are also applied to vacuum and conformall... |
1505.00744 | Ifra Noureen | M. Zubair, Ifra Noureen | Evolution of Axially Symmetric Anisotropic Sources in $f(R,T)$ Gravity | 19 pages | Eur. Phys. J. C (2015) 75:265 | 10.1140/epjc/s10052-015-3496-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the dynamical analysis in $f(R,T)$ gravity (where $R$ is Ricci
scalar and $T$ is trace of energy momentum tensor) for gravitating sources
carrying axial symmetry. The self gravitating system is taken to be anisotropic
and line element describes axially symmetric geometry avoiding rotation about
symmetry ax... | [
{
"created": "Thu, 30 Apr 2015 07:02:59 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Zubair",
"M.",
""
],
[
"Noureen",
"Ifra",
""
]
] | We discuss the dynamical analysis in $f(R,T)$ gravity (where $R$ is Ricci scalar and $T$ is trace of energy momentum tensor) for gravitating sources carrying axial symmetry. The self gravitating system is taken to be anisotropic and line element describes axially symmetric geometry avoiding rotation about symmetry axis... |
0902.3004 | Slava G. Turyshev | Slava G. Turyshev, Thomas W. Murphy, Jr., Eric G. Adelberger, James
Battat, Douglas Currie, William M. Folkner, Jens Gundlach, Stephen M.
Merkowitz, Kenneth L. Nordtvedt, Robert D. Reasenberg, Irwin I. Shapiro,
Michael Shao, Christopher W. Stubbs, Massimo Tinto, James G. Williams, and
Nan Yu | Opportunities for Probing Fundamental Gravity with Solar System
Experiments | 8 pages, LaTeX, Astro2010 Science White Paper | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent discovery of "dark energy" has challenged Einstein's general
theory of relativity as a complete model for our macroscopic universe. From a
theoretical view, the challenge is even stronger: general relativity clearly
does not extend to the very small, where quantum mechanics holds sway.
Fundamental physics ... | [
{
"created": "Tue, 17 Feb 2009 21:17:46 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Feb 2009 00:07:43 GMT",
"version": "v2"
}
] | 2012-08-27 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Murphy,",
"Thomas W.",
"Jr."
],
[
"Adelberger",
"Eric G.",
""
],
[
"Battat",
"James",
""
],
[
"Currie",
"Douglas",
""
],
[
"Folkner",
"William M.",
""
],
[
"Gundlach",
"Jens",
... | The recent discovery of "dark energy" has challenged Einstein's general theory of relativity as a complete model for our macroscopic universe. From a theoretical view, the challenge is even stronger: general relativity clearly does not extend to the very small, where quantum mechanics holds sway. Fundamental physics mo... |
1504.07782 | Anja Marunovic | Dra\v{z}en Glavan, Anja Marunovi\'c and Tomislav Prokopec | Inflation from cosmological constant and nonminimally coupled scalar | 19 pages, 13 figures | Phys. Rev. D 92, 044008 (2015) | 10.1103/PhysRevD.92.044008 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider inflation in a universe with a positive cosmological constant and
a nonminimally coupled scalar field, in which the field couples both
quadratically and quartically to the Ricci scalar. When considered in the
Einstein frame and when the nonminimal couplings are negative, the field starts
in slow roll and ... | [
{
"created": "Wed, 29 Apr 2015 09:23:18 GMT",
"version": "v1"
}
] | 2015-08-21 | [
[
"Glavan",
"Dražen",
""
],
[
"Marunović",
"Anja",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | We consider inflation in a universe with a positive cosmological constant and a nonminimally coupled scalar field, in which the field couples both quadratically and quartically to the Ricci scalar. When considered in the Einstein frame and when the nonminimal couplings are negative, the field starts in slow roll and in... |
gr-qc/9603035 | Saha Bijan | R. Alvarado, Yu. P. Rybakov, B. Saha and G. N. Shikin | Exact Self-consistent Solutions to the Interacting Spinor and Scalar
Field Equations in Bianchi Type-I Space-time | LaTeX, 10 pages | Russ.Phys.J. 38 (1995) 700-705; Izv.Vuz.Fiz. 38N7 (1995) 53-58 | null | JINR Preprint E2-95-16 | gr-qc | null | Self-consistent solutions to the system of spinor and scalar field equations
in General Relativity are studied for the case of Bianchi type-I space-time. It
should be emphasized the absence of initial singularity for some types of
solutions and also the isotropic mode of space-time in some special case.
| [
{
"created": "Fri, 22 Mar 1996 13:54:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Alvarado",
"R.",
""
],
[
"Rybakov",
"Yu. P.",
""
],
[
"Saha",
"B.",
""
],
[
"Shikin",
"G. N.",
""
]
] | Self-consistent solutions to the system of spinor and scalar field equations in General Relativity are studied for the case of Bianchi type-I space-time. It should be emphasized the absence of initial singularity for some types of solutions and also the isotropic mode of space-time in some special case. |
0710.4898 | Alicia M. Sintes | Alicia M. Sintes (for the LIGO Scientific Collaboration) | Report on an all-sky LIGO search for periodic gravitational waves in the
S4 data | 5 pages, 1 figure, presented at Amaldi7, Sydney (July 2007) | J.Phys.Conf.Ser.122:012033,2008 | 10.1088/1742-6596/122/1/012033 | LIGO-P070121 | gr-qc | null | We report on an all-sky search with the LIGO detectors for periodic
gravitational waves in the frequency range 50-1000 Hz and having a negative
frequency time derivative with magnitude between zero and $10^{-8}$ Hz/s. Data
from the fourth LIGO science run have been used in this search. Three different
semi-coherent m... | [
{
"created": "Thu, 25 Oct 2007 15:39:44 GMT",
"version": "v1"
}
] | 2019-08-13 | [
[
"Sintes",
"Alicia M.",
"",
"for the LIGO Scientific Collaboration"
]
] | We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1000 Hz and having a negative frequency time derivative with magnitude between zero and $10^{-8}$ Hz/s. Data from the fourth LIGO science run have been used in this search. Three different semi-coherent met... |
gr-qc/0201094 | Reza Tavakol | W.B.Bonnor | Classical gravitational spin-spin interaction | six pages, no figures, journal ref:accepted for Classical and Quantum
Gravity | null | 10.1088/0264-9381/19/1/308 | null | gr-qc | null | I obtain an exact, axially symmetric, stationary solution of Einstein's
equations for two massless spinning particles. The term representing the
spin-spin interaction agrees with recently published approximate work. The
spin-spin force appears to be proportional to the inverse fourth power of the
coordinate distance ... | [
{
"created": "Wed, 30 Jan 2002 12:11:50 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bonnor",
"W. B.",
""
]
] | I obtain an exact, axially symmetric, stationary solution of Einstein's equations for two massless spinning particles. The term representing the spin-spin interaction agrees with recently published approximate work. The spin-spin force appears to be proportional to the inverse fourth power of the coordinate distance be... |
1905.03408 | Carlos Rodriguez Benites | Carlos Rodriguez-Benites, Mauricio Cataldo, Antonella Cid and Carlos
R\'ios | Modelling the current accelerated expansion of the Universe with
Holographic Dark Energy | 5 pages, 1 figure, XXI Simposio Chileno de F\'isica | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore a Holographic Dark Energy Model in a flat
Friedmann-Lema\^itre-Robertson-Walker Universe, which contains baryons,
radiation, cold dark matter and dark energy within the framework of General
Relativity. Furthermore, we consider three types of phenomenological
interactions in the dark sector. Wi... | [
{
"created": "Thu, 9 May 2019 02:05:40 GMT",
"version": "v1"
}
] | 2019-05-10 | [
[
"Rodriguez-Benites",
"Carlos",
""
],
[
"Cataldo",
"Mauricio",
""
],
[
"Cid",
"Antonella",
""
],
[
"Ríos",
"Carlos",
""
]
] | In this work we explore a Holographic Dark Energy Model in a flat Friedmann-Lema\^itre-Robertson-Walker Universe, which contains baryons, radiation, cold dark matter and dark energy within the framework of General Relativity. Furthermore, we consider three types of phenomenological interactions in the dark sector. With... |
1910.07256 | Sebastian Schuster | Sebastian Schuster (Victoria University of Wellington) | Sparsity of Hawking Radiation in $D+1$ Space-Time Dimensions Including
Particle Masses | 6 pages, 2 figures | Class.Quant.Grav. 38 (2021) 4, 047002 | 10.1088/1361-6382/abd144 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation from an evaporating black hole has often been compared to
black body radiation. However, this comparison misses an important feature of
Hawking radiation: Its low density of states. This can be captured in an easy
to calculate, heuristic, and semi-analytic measure called "sparsity". In this
letter w... | [
{
"created": "Wed, 16 Oct 2019 10:00:53 GMT",
"version": "v1"
}
] | 2021-02-17 | [
[
"Schuster",
"Sebastian",
"",
"Victoria University of Wellington"
]
] | Hawking radiation from an evaporating black hole has often been compared to black body radiation. However, this comparison misses an important feature of Hawking radiation: Its low density of states. This can be captured in an easy to calculate, heuristic, and semi-analytic measure called "sparsity". In this letter we ... |
2207.08571 | Andronikos Paliathanasis | Genly Leon and Andronikos Paliathanasis | Anisotropic spacetimes in $f(T,B)$ theory III: LRS Bianchi III Universe | 14 pages, 2 figures | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We study the asymptotic dynamics of $f(T, B)$-theory in an anisotropic
Bianchi III background geometry. We show that an attractor always exists for
the field equations, which depends on a free parameter provided by the specific
$f(T, B)$ functional form. The attractor is an accelerated spatially flat FLRW
or non-acce... | [
{
"created": "Mon, 18 Jul 2022 12:56:54 GMT",
"version": "v1"
}
] | 2022-07-19 | [
[
"Leon",
"Genly",
""
],
[
"Paliathanasis",
"Andronikos",
""
]
] | We study the asymptotic dynamics of $f(T, B)$-theory in an anisotropic Bianchi III background geometry. We show that an attractor always exists for the field equations, which depends on a free parameter provided by the specific $f(T, B)$ functional form. The attractor is an accelerated spatially flat FLRW or non-accele... |
0904.0067 | Hongsheng Zhang | Hongsheng Zhang and Hyerim Noh | Braneworld cosmology in the sourced-Taub background | 10 pages, 3 figures, v2: a section to review the previous results on
the source of Taub space added, PLB in press | Phys.Lett.B679:81-87,2009 | 10.1016/j.physletb.2009.07.021 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new braneworld in the sourced-Taub background is proposed. The gravity
field equations in the internal source region and external vacuum region are
investigated, respectively. We find that the equation of state for the
effective dark energy of a dust brane in the source region can cross the
phantom divide $w=-1$. F... | [
{
"created": "Wed, 1 Apr 2009 06:12:27 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jul 2009 05:13:46 GMT",
"version": "v2"
}
] | 2010-03-12 | [
[
"Zhang",
"Hongsheng",
""
],
[
"Noh",
"Hyerim",
""
]
] | A new braneworld in the sourced-Taub background is proposed. The gravity field equations in the internal source region and external vacuum region are investigated, respectively. We find that the equation of state for the effective dark energy of a dust brane in the source region can cross the phantom divide $w=-1$. Fur... |
2210.04668 | N. Merve Uzun | Ozgur Akarsu, A. Kazim Camlibel, Nihan Katirci, Ibrahim Semiz, N.
Merve Uzun | Weak field and slow motion limits in energy-momentum powered gravity | 13 pages, no figures and tables; matches the version published in
Physics of the Dark Universe | Phys. Dark Univ. 42, 101305 (2023) | 10.1016/j.dark.2023.101305 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the weak field and slow motion limits, Newtonian and
Post-Newtonian limits, of the energy-momentum powered gravity (EMPG), viz., the
energy-momentum squared gravity (EMSG) of the form
$f(T_{\mu\nu}T^{\mu\nu})=\alpha (T_{\mu\nu}T^{\mu\nu})^{\eta}$ with $\alpha$
and $\eta$ being constants. We have shown that... | [
{
"created": "Mon, 10 Oct 2022 13:15:50 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Aug 2023 20:12:39 GMT",
"version": "v2"
}
] | 2023-08-21 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Camlibel",
"A. Kazim",
""
],
[
"Katirci",
"Nihan",
""
],
[
"Semiz",
"Ibrahim",
""
],
[
"Uzun",
"N. Merve",
""
]
] | We explore the weak field and slow motion limits, Newtonian and Post-Newtonian limits, of the energy-momentum powered gravity (EMPG), viz., the energy-momentum squared gravity (EMSG) of the form $f(T_{\mu\nu}T^{\mu\nu})=\alpha (T_{\mu\nu}T^{\mu\nu})^{\eta}$ with $\alpha$ and $\eta$ being constants. We have shown that E... |
1612.00353 | Martin Bojowald | Martin Bojowald and Theodore Halnon | Time in quantum cosmology | 20 pages | Phys. Rev. D 98, 066001 (2018) | 10.1103/PhysRevD.98.066001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmological model with two global internal times shows that time
reparameterization invariance, and therefore covariance, is not guaranteed by
deparameterization. In particular, it is impossible to derive proper-time
effective equations from a single deparameterized model if quantum corrections
from fluctuations a... | [
{
"created": "Thu, 1 Dec 2016 17:20:37 GMT",
"version": "v1"
}
] | 2018-09-13 | [
[
"Bojowald",
"Martin",
""
],
[
"Halnon",
"Theodore",
""
]
] | A cosmological model with two global internal times shows that time reparameterization invariance, and therefore covariance, is not guaranteed by deparameterization. In particular, it is impossible to derive proper-time effective equations from a single deparameterized model if quantum corrections from fluctuations and... |
0811.3869 | Guillermo A. Gonzalez | Guillermo A. Gonz\'alez, Antonio C. Guti\'errez-Pi\~neres, Viviana M.
Vi\~na-Cervantes | Relativistic static thin dust disks with an inner edge: An infinite
family of new exact solutions | 9 pages, 3 figures | Phys.Rev.D79:124048,2009 | 10.1103/PhysRevD.79.124048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An infinite family of new exact solutions of the Einstein vacuum equations
for static and axially symmetric spacetimes is presented. All the metric
functions of the solutions are explicitly computed and the obtained expressions
are simply written in terms of oblate spheroidal coordinates. Furthermore, the
solutions a... | [
{
"created": "Mon, 24 Nov 2008 17:43:54 GMT",
"version": "v1"
}
] | 2009-07-09 | [
[
"González",
"Guillermo A.",
""
],
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
],
[
"Viña-Cervantes",
"Viviana M.",
""
]
] | An infinite family of new exact solutions of the Einstein vacuum equations for static and axially symmetric spacetimes is presented. All the metric functions of the solutions are explicitly computed and the obtained expressions are simply written in terms of oblate spheroidal coordinates. Furthermore, the solutions are... |
2406.13845 | Hugo Garcia-Compean | H. Garc\'ia-Compe\'an, J. Hern\'andez-Aguilar, D. Mata-Pacheco, C.
Ram\'irez | Effects of quantum corrections to Lorentzian vacuum transitions in the
presence of gravity | 36 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a study of the vacuum transition probabilities taking into account
quantum corrections. We first introduce a general method that expand previous
works employing the Lorentzian formalism of the Wheeler-De Witt equation by
considering higher order terms in the semiclassical expansion. The method
presented is... | [
{
"created": "Wed, 19 Jun 2024 21:17:34 GMT",
"version": "v1"
}
] | 2024-06-21 | [
[
"García-Compeán",
"H.",
""
],
[
"Hernández-Aguilar",
"J.",
""
],
[
"Mata-Pacheco",
"D.",
""
],
[
"Ramírez",
"C.",
""
]
] | We present a study of the vacuum transition probabilities taking into account quantum corrections. We first introduce a general method that expand previous works employing the Lorentzian formalism of the Wheeler-De Witt equation by considering higher order terms in the semiclassical expansion. The method presented is a... |
gr-qc/0611090 | Carlos Barcelo | Carlos Barcelo | Cosmology as a search for overall equilibrium | 9 pages, 1 figure | JETPLett.84:635-639,2007 | 10.1134/S0021364006240015 | null | gr-qc astro-ph | null | In this letter we will revise the steps followed by A. Einstein when he first
wrote on cosmology from the point of view of the general theory of relativity.
We will argue that his insightful line of thought leading to the introduction
of the cosmological constant in the equations of motion has only one weakness:
The ... | [
{
"created": "Thu, 16 Nov 2006 18:19:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Barcelo",
"Carlos",
""
]
] | In this letter we will revise the steps followed by A. Einstein when he first wrote on cosmology from the point of view of the general theory of relativity. We will argue that his insightful line of thought leading to the introduction of the cosmological constant in the equations of motion has only one weakness: The co... |
1412.3015 | Plamen Fiziev | Plamen Fiziev and Kalin Marinov | Compact statis stars with polytropic equation of state in minimal
dilatonic gravity | 10 pages, 10 figures, TeX file. New commnets, references and
acknowledgments added. The jpg files for figures are replaced by eps ones.
Accepted for publication in Bulgarian Astronomical Journal, vol. 22 | Bulgarian Astronomical Journal, Vol. 23, p.3, (2015) | null | TIFA 12-2014 | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present solution of the equations for relativistic static spherically
symmetric stars (SSSS) in the model of minimal dilatonic gravity (MDG) using
the polytropic equation of state. A polytropic equation of state, which has a
good fitting with a more realistic one, is used. Results are obtained for all
variables of... | [
{
"created": "Tue, 9 Dec 2014 16:37:43 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2015 14:39:52 GMT",
"version": "v2"
}
] | 2015-02-03 | [
[
"Fiziev",
"Plamen",
""
],
[
"Marinov",
"Kalin",
""
]
] | We present solution of the equations for relativistic static spherically symmetric stars (SSSS) in the model of minimal dilatonic gravity (MDG) using the polytropic equation of state. A polytropic equation of state, which has a good fitting with a more realistic one, is used. Results are obtained for all variables of a... |
gr-qc/0203090 | Laszlo A. Gergely | L\'aszl\'o \'A. Gergely, Zolt\'an Perj\'es | Kerr-Schild metrics revisited II. The complete vacuum solution | 21 pages | J.Math.Phys. 35 (1994) 2448-2462 | 10.1063/1.530516 | null | gr-qc | null | The complete solution of Einstein's gravitational equations with a
vacuum-vacuum Kerr-Schild pencil of metrics $g_{ab}+V l_al_b$ is obtained. Our
result generalizes the solution of the Kerr-Schild problem with a flat metric
$g_{ab}$ (represented by the Kerr theorem) to the case when $g_{ab}$ is the
metric of a curved... | [
{
"created": "Tue, 26 Mar 2002 12:35:10 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gergely",
"László Á.",
""
],
[
"Perjés",
"Zoltán",
""
]
] | The complete solution of Einstein's gravitational equations with a vacuum-vacuum Kerr-Schild pencil of metrics $g_{ab}+V l_al_b$ is obtained. Our result generalizes the solution of the Kerr-Schild problem with a flat metric $g_{ab}$ (represented by the Kerr theorem) to the case when $g_{ab}$ is the metric of a curved s... |
gr-qc/9504049 | Rainer Mueller | Rainer Mueller and Carlos O. Lousto | Entanglement entropy in curved spacetimes with event horizons | 12 pages, RevTex 3.0, 2 figures as uuencoded compressed Postscript
files | Phys.Rev. D52 (1995) 4512-4517 | 10.1103/PhysRevD.52.4512 | UAB-FT-362 | gr-qc astro-ph hep-th | null | We consider the computation of the entanglement entropy in curved backgrounds
with event horizons. We use a Hamiltonian approach to the problem and perform
numerical computations on a spherical lattice of spacing $a$. We study the
cosmological case and make explicit computations for the
Friedmann-Robertson-Walker uni... | [
{
"created": "Fri, 28 Apr 1995 06:40:15 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Mueller",
"Rainer",
""
],
[
"Lousto",
"Carlos O.",
""
]
] | We consider the computation of the entanglement entropy in curved backgrounds with event horizons. We use a Hamiltonian approach to the problem and perform numerical computations on a spherical lattice of spacing $a$. We study the cosmological case and make explicit computations for the Friedmann-Robertson-Walker unive... |
gr-qc/9511028 | Robert Mann | C. Alvarez and R.B. Mann | The Equivalence Principle and Anomalous Magnetic Moment Experiments | 26 pages, latex, epsf, 1 figure, final version which appears in
Physical Review D | Phys.Rev.D54:7097-7107,1996 | 10.1103/PhysRevD.54.7097 | null | gr-qc | null | We investigate the possibility of testing of the Einstein Equivalence
Principle (EEP) using measurements of anomalous magnetic moments of elementary
particles. We compute the one loop correction for the $g-2$ anomaly within the
class of non metric theories of gravity described by the \tmu formalism. We
find several n... | [
{
"created": "Wed, 8 Nov 1995 17:48:09 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Nov 1995 20:26:52 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Dec 1996 18:35:20 GMT",
"version": "v3"
}
] | 2010-01-06 | [
[
"Alvarez",
"C.",
""
],
[
"Mann",
"R. B.",
""
]
] | We investigate the possibility of testing of the Einstein Equivalence Principle (EEP) using measurements of anomalous magnetic moments of elementary particles. We compute the one loop correction for the $g-2$ anomaly within the class of non metric theories of gravity described by the \tmu formalism. We find several nov... |
1911.02415 | Omar Zanusso | Maximilian Becker, Carlo Pagani and Omar Zanusso | Fractal geometry of higher derivative gravity | 5 pages, to appear in PRL | Phys. Rev. Lett. 124, 151302 (2020) | 10.1103/PhysRevLett.124.151302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the scaling properties of geometric operators such as lengths,
areas, and volumes in models of higher derivative quantum gravity by
renormalizing appropriate composite operators. We use these results to deduce
the fractal dimensions of such hypersurfaces embedded in a quantum spacetime at
very small dist... | [
{
"created": "Wed, 6 Nov 2019 14:46:44 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Apr 2020 10:39:18 GMT",
"version": "v2"
}
] | 2020-04-22 | [
[
"Becker",
"Maximilian",
""
],
[
"Pagani",
"Carlo",
""
],
[
"Zanusso",
"Omar",
""
]
] | We determine the scaling properties of geometric operators such as lengths, areas, and volumes in models of higher derivative quantum gravity by renormalizing appropriate composite operators. We use these results to deduce the fractal dimensions of such hypersurfaces embedded in a quantum spacetime at very small distan... |
gr-qc/9308007 | D. V. Ahluwalia | D. V. Ahluwalia | Quantum Measurement, Gravitation, and Locality | LA-UR-93-2890-REV, "honorable mention" for the 1994 Awards by Gravity
Research Foundation | Phys.Lett.B339:301-303,1994 | 10.1016/0370-2693(94)90622-X | null | gr-qc hep-th | null | This essay argues that when measurement processes involve energies of the
order of the Planck scale, the fundamental assumption of locality may no longer
be a good approximation. Idealized position measurements of two distinguishable
spin-$0$ particles are considered. The measurements alter the space-time metric
in a... | [
{
"created": "Mon, 9 Aug 1993 17:59:32 GMT",
"version": "v1"
},
{
"created": "Tue, 17 May 1994 01:55:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ahluwalia",
"D. V.",
""
]
] | This essay argues that when measurement processes involve energies of the order of the Planck scale, the fundamental assumption of locality may no longer be a good approximation. Idealized position measurements of two distinguishable spin-$0$ particles are considered. The measurements alter the space-time metric in a f... |
1309.7582 | Sang Pyo Kim | Sang Pyo Kim | Particle Production from Geometric Transition in Expanding Universe | Latex 4 pages, 1 figure; Proceedings of APPC12, to be published in J.
Phys. Soc. Japan, Supplement | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometric transitions from the evolution in the complex plane of time
provide channels for particle production for a quantum field in expanding
universes. The production rate for one pair is obtained by squaring and summing
the scattering matrix between the in-vacuum and the transported one over all
possible inde... | [
{
"created": "Sun, 29 Sep 2013 12:18:29 GMT",
"version": "v1"
}
] | 2013-10-01 | [
[
"Kim",
"Sang Pyo",
""
]
] | The geometric transitions from the evolution in the complex plane of time provide channels for particle production for a quantum field in expanding universes. The production rate for one pair is obtained by squaring and summing the scattering matrix between the in-vacuum and the transported one over all possible indepe... |
gr-qc/9703005 | Yuri Levin | Yu. Levin | QND and higher order effects for a nonlinear meter in an interferometric
gravitational wave antenna | LaTex, 17 pages, 3 figures | Phys.Rev. D57 (1998) 2069-2078 | 10.1103/PhysRevD.57.2069 | null | gr-qc quant-ph | null | A new optical topology and signal readout strategy for a laser interferometer
gravitational wave detector were proposed recently by Braginsky and Khalili .
Their method is based on using a nonlinear medium inside a microwave oscillator
to detect the gravitational-wave-induced spatial shift of the interferometer's
sta... | [
{
"created": "Sat, 1 Mar 1997 00:37:05 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Levin",
"Yu.",
""
]
] | A new optical topology and signal readout strategy for a laser interferometer gravitational wave detector were proposed recently by Braginsky and Khalili . Their method is based on using a nonlinear medium inside a microwave oscillator to detect the gravitational-wave-induced spatial shift of the interferometer's stand... |
1408.4273 | Andrea Geralico | Donato Bini, Fernando de Felice, Andrea Geralico, Andrea Lunari | Spinning test particles in Weyl spacetimes | 25 pages, 6 figures; published version | J. Phys. A: Math. Gen. 38, 1163 (2005) | 10.1088/0305-4470/38/5/017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of spinning test particles along circular orbits in static vacuum
spacetimes belonging to the Weyl class is discussed. Spin alignment and
coupling with background parameters in the case of superimposed Weyl fields,
corresponding to a single Schwarzschild black hole and single Chazy-Curzon
particle as well ... | [
{
"created": "Tue, 19 Aug 2014 10:03:29 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"de Felice",
"Fernando",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Lunari",
"Andrea",
""
]
] | The motion of spinning test particles along circular orbits in static vacuum spacetimes belonging to the Weyl class is discussed. Spin alignment and coupling with background parameters in the case of superimposed Weyl fields, corresponding to a single Schwarzschild black hole and single Chazy-Curzon particle as well as... |
gr-qc/0603133 | Jacek Tafel | M. Jakimowicz and J. Tafel | Self-dual metrics in Husain's approach | 8 pages | Class. Quantum Grav. 23 (2006) 4907-4913 | 10.1088/0264-9381/23/15/010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Husain's reduction of the self-dual Einstein equations is
equivalent to the Pleba\'nski equation. The B\"acklund transformation between
these equations is found. Contact symmetries of the Husain-Park equation and
corresponding conservation laws are derived.
| [
{
"created": "Fri, 31 Mar 2006 15:36:59 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2016 16:11:05 GMT",
"version": "v2"
}
] | 2016-02-12 | [
[
"Jakimowicz",
"M.",
""
],
[
"Tafel",
"J.",
""
]
] | We show that Husain's reduction of the self-dual Einstein equations is equivalent to the Pleba\'nski equation. The B\"acklund transformation between these equations is found. Contact symmetries of the Husain-Park equation and corresponding conservation laws are derived. |
0912.1722 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Selection criteria for two-parameter solutions to scalar-tensor gravity | 24 pages, 7 figures, 2 tables | Gen.Rel.Grav.42:1427-1456,2010 | 10.1007/s10714-009-0915-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make a systematic investigation of the generic properties of static,
spherically symmetric, asymptotically flat solutions to the field equations
describing gravity minimally coupled to a nonlinear self-gravitating real
scalar field. Seven corollaries and a theorem on selection criteria for two-
and one-parametric ... | [
{
"created": "Wed, 9 Dec 2009 11:18:55 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | We make a systematic investigation of the generic properties of static, spherically symmetric, asymptotically flat solutions to the field equations describing gravity minimally coupled to a nonlinear self-gravitating real scalar field. Seven corollaries and a theorem on selection criteria for two- and one-parametric so... |
0804.3393 | Shantanu Desai | Shantanu Desai, Kazuhiro Hayama, Soumya Mohanty, Malik Rakhmanov,
Tiffany Summerscales, Sanichiro Yoshida | Proposed method for searches of gravitational waves from PKS 2155-304
and other blazar flares | 10 pages, 7 figures. Contribution to 12th Gravitational Wave Data
Analysis Workshop. Submitted to Classical and Quantum Gravity. Changes in
response to referee comments | Class.Quant.Grav.25:184024,2008 | 10.1088/0264-9381/25/18/184024 | LIGO-P080023 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to search for gravitational waves from PKS 2155-304 as well as
other blazars. PKS 2155-304 emitted a long duration energetic flare in July
2006, with total isotropic equivalent energy released in TeV gamma rays of
approximately $10^{45}$ ergs. Any possible gravitational wave signals
associated with this ou... | [
{
"created": "Mon, 21 Apr 2008 20:00:26 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jul 2008 05:21:44 GMT",
"version": "v2"
}
] | 2008-12-06 | [
[
"Desai",
"Shantanu",
""
],
[
"Hayama",
"Kazuhiro",
""
],
[
"Mohanty",
"Soumya",
""
],
[
"Rakhmanov",
"Malik",
""
],
[
"Summerscales",
"Tiffany",
""
],
[
"Yoshida",
"Sanichiro",
""
]
] | We propose to search for gravitational waves from PKS 2155-304 as well as other blazars. PKS 2155-304 emitted a long duration energetic flare in July 2006, with total isotropic equivalent energy released in TeV gamma rays of approximately $10^{45}$ ergs. Any possible gravitational wave signals associated with this outb... |
gr-qc/9806070 | Ulises Nucamendi | Marcelo Salgado, Daniel Sudarsky (ICN-UNAM) and Ulises Nucamendi
(CINVESTAV) | On spontaneous scalarization | 41 pages, RevTex, 10 ps figures, submitted to Phys. Rev. D | Phys.Rev. D58 (1998) 124003 | 10.1103/PhysRevD.58.124003 | null | gr-qc | null | We study in the physical frame the phenomenon of spontaneous scalarization
that occurs in scalar-tensor theories of gravity for compact objects. We
discuss the fact that the phenomenon occurs exactly in the regime where the
Newtonian analysis indicates it should not. Finally we discuss the way the
phenomenon depends ... | [
{
"created": "Tue, 16 Jun 1998 18:34:16 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Salgado",
"Marcelo",
"",
"ICN-UNAM"
],
[
"Sudarsky",
"Daniel",
"",
"ICN-UNAM"
],
[
"Nucamendi",
"Ulises",
"",
"CINVESTAV"
]
] | We study in the physical frame the phenomenon of spontaneous scalarization that occurs in scalar-tensor theories of gravity for compact objects. We discuss the fact that the phenomenon occurs exactly in the regime where the Newtonian analysis indicates it should not. Finally we discuss the way the phenomenon depends on... |
1510.04170 | Frederic H. Vincent | F. H. Vincent, Z. Meliani, P. Grandclement, E. Gourgoulhon, O. Straub | Imaging a boson star at the Galactic center | 21 pages, 9 figures, accepted in CQG; main difference wrt previous
version is the last paragraph of the conclusion | null | 10.1088/0264-9381/33/10/105015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Millimeter very long baseline interferometry will soon produce accurate
images of the closest surroundings of the supermassive compact object at the
center of the Galaxy, Sgr A*. These images may reveal the existence of a
central faint region, the so-called shadow, which is often interpreted as the
observable consequ... | [
{
"created": "Wed, 14 Oct 2015 15:53:21 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2016 09:19:52 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Vincent",
"F. H.",
""
],
[
"Meliani",
"Z.",
""
],
[
"Grandclement",
"P.",
""
],
[
"Gourgoulhon",
"E.",
""
],
[
"Straub",
"O.",
""
]
] | Millimeter very long baseline interferometry will soon produce accurate images of the closest surroundings of the supermassive compact object at the center of the Galaxy, Sgr A*. These images may reveal the existence of a central faint region, the so-called shadow, which is often interpreted as the observable consequen... |
2301.07678 | Tiberiu Harko | Cristina Blaga, Paul Blaga, Tiberiu Harko | Jacobi and Lyapunov stability analysis of circular geodesics around a
spherically symmetric dilaton black hole | 20 pages, 7 figures, accepted for publication in Symmetry | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the stability of the geodesic curves in the geometry of the
Gibbons-Maeda-Garfinkle-Horowitz-Strominger black hole, describing the space
time of a charged black hole in the low energy limit of the string theory. The
stability analysis is performed by using both the linear (Lyapunov) stability
method, as we... | [
{
"created": "Wed, 18 Jan 2023 17:56:23 GMT",
"version": "v1"
}
] | 2023-01-19 | [
[
"Blaga",
"Cristina",
""
],
[
"Blaga",
"Paul",
""
],
[
"Harko",
"Tiberiu",
""
]
] | We analyze the stability of the geodesic curves in the geometry of the Gibbons-Maeda-Garfinkle-Horowitz-Strominger black hole, describing the space time of a charged black hole in the low energy limit of the string theory. The stability analysis is performed by using both the linear (Lyapunov) stability method, as well... |
gr-qc/9809050 | Shinji Mukohyama | Shinji Mukohyama | On the Noether charge form of the first law of black hole mechanics | Latex, 16 pages, arguments on gauge conditions and near-stationary
entropy are added, accepted for publication in Physical Review D | Phys. Rev. D 59, 064009 (1999) | 10.1103/PhysRevD.59.064009 | YITP-98-61 | gr-qc | null | The first law of black hole mechanics was derived by Wald in a general
covariant theory of gravity for stationary variations around a stationary black
hole. It is formulated in terms of Noether charges, and has many advantages. In
this paper several issues are discussed to strengthen the validity of the
Noether charg... | [
{
"created": "Thu, 17 Sep 1998 08:32:49 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 1998 06:33:11 GMT",
"version": "v2"
},
{
"created": "Sat, 24 Oct 1998 08:35:51 GMT",
"version": "v3"
},
{
"created": "Wed, 18 Nov 1998 06:06:48 GMT",
"version": "v4"
}
] | 2016-08-25 | [
[
"Mukohyama",
"Shinji",
""
]
] | The first law of black hole mechanics was derived by Wald in a general covariant theory of gravity for stationary variations around a stationary black hole. It is formulated in terms of Noether charges, and has many advantages. In this paper several issues are discussed to strengthen the validity of the Noether charge ... |
gr-qc/0007031 | Theodore A. Jacobson | Ted Jacobson and David Mattingly | Gravity with a dynamical preferred frame | 9 pages; title changed, references added, relation to prior work of
Gasperini discussed, errors in scalar field stress tensor corrected, various
minor changes to Introduction; Final version to be published in PRD: relation
to prior work of Kostelecky and Samuel spelled out in detail, clarifications
and sign err... | Phys.Rev. D64 (2001) 024028 | 10.1103/PhysRevD.64.024028 | null | gr-qc hep-ph hep-th | null | We study a generally covariant model in which local Lorentz invariance is
broken "spontaneously" by a dynamical unit timelike vector field $u^a$---the
"aether". Such a model makes it possible to study the gravitational and
cosmological consequences of preferred frame effects, such as ``variable speed
of light" or hig... | [
{
"created": "Fri, 14 Jul 2000 18:56:24 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Sep 2000 01:04:03 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Apr 2001 19:44:04 GMT",
"version": "v3"
},
{
"created": "Sat, 2 Jun 2001 01:29:20 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Jacobson",
"Ted",
""
],
[
"Mattingly",
"David",
""
]
] | We study a generally covariant model in which local Lorentz invariance is broken "spontaneously" by a dynamical unit timelike vector field $u^a$---the "aether". Such a model makes it possible to study the gravitational and cosmological consequences of preferred frame effects, such as ``variable speed of light" or high ... |
gr-qc/0010065 | Paul M. Alsing | P.M. Alsing, J.C. Evans and K.K. Nandi | The phase of a quantum mechanical particle in curved spacetime | 30 pages, no figures. Submitted to Gen.Rel.Grav 17 Oct 00 | Gen.Rel.Grav. 33 (2001) 1459-1487 | 10.1023/A:1012284625541 | null | gr-qc | null | We investigate the quantum mechanical wave equations for free particles of
spin 0,1/2,1 in the background of an arbitrary static gravitational field in
order to explicitly determine if the phase of the wavefunction is $S/\hbar =
\int p_{\mu} dx^{\mu} / \hbar$, as is often quoted in the literature. We work
in isotropi... | [
{
"created": "Wed, 18 Oct 2000 20:52:39 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Alsing",
"P. M.",
""
],
[
"Evans",
"J. C.",
""
],
[
"Nandi",
"K. K.",
""
]
] | We investigate the quantum mechanical wave equations for free particles of spin 0,1/2,1 in the background of an arbitrary static gravitational field in order to explicitly determine if the phase of the wavefunction is $S/\hbar = \int p_{\mu} dx^{\mu} / \hbar$, as is often quoted in the literature. We work in isotropic ... |
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