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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9408014 | Robert H. Gowdy | Robert H. Gowdy | Affine projection tensor geometry: Lie derivatives and isometries | 23 pages RevTeX | J.Math.Phys. 36 (1995) 1882-1907; Erratum-ibid. 36 (1995) 5200 | 10.1063/1.531092 | null | gr-qc | null | The generalized projection-tensor geometry introduced in an earlier paper is
extended. A compact notation for families of projected objects is introduced
and used to summarize the results of the previous paper and obtain fully
projected decompositions of Lie derivatives of the projection tensor field, the
metric and ... | [
{
"created": "Wed, 10 Aug 1994 18:10:21 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Gowdy",
"Robert H.",
""
]
] | The generalized projection-tensor geometry introduced in an earlier paper is extended. A compact notation for families of projected objects is introduced and used to summarize the results of the previous paper and obtain fully projected decompositions of Lie derivatives of the projection tensor field, the metric and th... |
1110.3422 | Yousef Bisabr | Yousef Bisabr (Farzan-nahad) | The Coincidence Problem in Holographic f(R) Gravity | 10 pages, no figures | Phys. Scr. 84, 035901 (2011) | 10.1088/0031-8949/84/03/035901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that $f(R)$ gravity models formulated in Einstein conformal
frame are equivalent to Einstein gravity together with a minimally coupled
scalar field. In this case, the scalar field couples with the matter sector and
the coupling term is given by the conformal factor. We apply the holographic
principle... | [
{
"created": "Sat, 15 Oct 2011 15:56:50 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Bisabr",
"Yousef",
"",
"Farzan-nahad"
]
] | It is well-known that $f(R)$ gravity models formulated in Einstein conformal frame are equivalent to Einstein gravity together with a minimally coupled scalar field. In this case, the scalar field couples with the matter sector and the coupling term is given by the conformal factor. We apply the holographic principle t... |
1610.09846 | Tim-Torben Paetz | Marc Mars, Tim-Torben Paetz, Jos\'e M. M. Senovilla | Classification of Kerr-de Sitter-like spacetimes with conformally flat
Scri | 63 pages | null | 10.1088/1361-6382/aa5dc2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a classification of $\Lambda>0$-vacuum spacetimes which admit a
Killing vector field with respect to which the associated "Mars-Simon tensor"
(MST) vanishes and having a conformally flat $\mathcal{J}^-$ (or
$\mathcal{J}^+$). To that end, we also give a complete classification of
conformal Killing vector fi... | [
{
"created": "Mon, 31 Oct 2016 10:02:13 GMT",
"version": "v1"
}
] | 2017-04-19 | [
[
"Mars",
"Marc",
""
],
[
"Paetz",
"Tim-Torben",
""
],
[
"Senovilla",
"José M. M.",
""
]
] | We provide a classification of $\Lambda>0$-vacuum spacetimes which admit a Killing vector field with respect to which the associated "Mars-Simon tensor" (MST) vanishes and having a conformally flat $\mathcal{J}^-$ (or $\mathcal{J}^+$). To that end, we also give a complete classification of conformal Killing vector fiel... |
2107.10217 | Ivan Agullo | Ivan Agullo, Anthony J. Brady and Dimitrios Kranas | Stimulating the Quantum Aspects of an Optical Analog White-Black Hole | 6 pages + supplemental material. 6 figures | null | 10.1103/PhysRevLett.128.091301 | null | gr-qc cond-mat.quant-gas hep-th quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | This work introduces a synergistic combination of analytical methods and
numerical simulations to study the propagation of weak wave-packet modes in an
optical medium containing the analog of a pair white-black hole. We apply our
tools to analyze several aspects of the evolution, such as (i) the region of
the paramet... | [
{
"created": "Wed, 21 Jul 2021 17:16:37 GMT",
"version": "v1"
}
] | 2022-03-24 | [
[
"Agullo",
"Ivan",
""
],
[
"Brady",
"Anthony J.",
""
],
[
"Kranas",
"Dimitrios",
""
]
] | This work introduces a synergistic combination of analytical methods and numerical simulations to study the propagation of weak wave-packet modes in an optical medium containing the analog of a pair white-black hole. We apply our tools to analyze several aspects of the evolution, such as (i) the region of the parameter... |
1305.3683 | Roberto A. Sussman | Roberto A Sussman | Invariant characterization of the growing and decaying density modes in
LTB dust models | Final version accepted for publication in Classical and Quantum
Gravity. 34 pages, 6 figures and 4 tables, IOP LaTeX format | Classical and Quantum Gravity 30 235001 (2013) | 10.1088/0264-9381/30/23/235001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain covariant expressions that generalize the growing and decaying
density modes of linear perturbation theory of dust sources by means of the
exact density perturbation from the formalism of quasi--local scalars
associated to weighed proper volume averages in LTB dust models. The relation
between these density... | [
{
"created": "Thu, 16 May 2013 04:55:34 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Sep 2013 23:29:28 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Sussman",
"Roberto A",
""
]
] | We obtain covariant expressions that generalize the growing and decaying density modes of linear perturbation theory of dust sources by means of the exact density perturbation from the formalism of quasi--local scalars associated to weighed proper volume averages in LTB dust models. The relation between these density m... |
2303.00117 | Giulia Maniccia | Giulia Maniccia, Giovanni Montani, Leonardo Torcellini | Study of the Inflationary Spectrum in the Presence of Quantum Gravity
Corrections | 24 pages. Discussion expanded and references added; matches the
published version | Universe 2023, 9(4), 169 | 10.3390/universe9040169 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | After a brief review of the different approaches to predict the possible
quantum gravity corrections to quantum field theory, we discuss in some detail
the formulation based on a Gaussian reference frame fixing. Then, we implement
this scenario to the determination of the inflationary spectrum of primordial
perturbat... | [
{
"created": "Tue, 28 Feb 2023 22:37:12 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2023 13:41:25 GMT",
"version": "v2"
}
] | 2023-06-12 | [
[
"Maniccia",
"Giulia",
""
],
[
"Montani",
"Giovanni",
""
],
[
"Torcellini",
"Leonardo",
""
]
] | After a brief review of the different approaches to predict the possible quantum gravity corrections to quantum field theory, we discuss in some detail the formulation based on a Gaussian reference frame fixing. Then, we implement this scenario to the determination of the inflationary spectrum of primordial perturbatio... |
0706.3770 | Z. Ya. Turakulov | A.T. Muminov, Z.Ya. Turakulov | Motion of a Vector Particle in a Curved Space-time. IV. Asymptotical
shape of caustic | 6 pages | Mod.Phys.Lett.A22:1091-1096,2007 | 10.1142/S0217732307023407 | null | gr-qc | null | The studies of influence of spin on a photon motion in a Schwartzschild
spacetime is continued. In the previous paper [2] the first order correction to
the geodesic motion is reduced to a non-uniform linear ordinary differential
equation and the equation obtained has been solved by the standard method of
integration ... | [
{
"created": "Tue, 26 Jun 2007 08:07:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Muminov",
"A. T.",
""
],
[
"Turakulov",
"Z. Ya.",
""
]
] | The studies of influence of spin on a photon motion in a Schwartzschild spacetime is continued. In the previous paper [2] the first order correction to the geodesic motion is reduced to a non-uniform linear ordinary differential equation and the equation obtained has been solved by the standard method of integration of... |
2406.04787 | Hai-Li Li | Zhijun Song, Huajie Gong, Hai-Li Li, Guoyang Fu, Li-Gang Zhu, Jian-Pin
Wu | Quasinormal modes and ringdown waveform of the Frolov black hole | 15 pages, 7 figures; accepted for publication in Communications in
Theoretical Physics | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the scalar perturbation over the Frolov black
hole (BH), which is a regular BH induced by the quantum gravity effect. The
quasinormal frequencies (QNFs) of scalar field always consistently reside in
the lower half-plane, and its time-domain evolution demonstrates a decaying
behavior, wit... | [
{
"created": "Fri, 7 Jun 2024 09:37:03 GMT",
"version": "v1"
}
] | 2024-06-10 | [
[
"Song",
"Zhijun",
""
],
[
"Gong",
"Huajie",
""
],
[
"Li",
"Hai-Li",
""
],
[
"Fu",
"Guoyang",
""
],
[
"Zhu",
"Li-Gang",
""
],
[
"Wu",
"Jian-Pin",
""
]
] | In this paper, we investigate the scalar perturbation over the Frolov black hole (BH), which is a regular BH induced by the quantum gravity effect. The quasinormal frequencies (QNFs) of scalar field always consistently reside in the lower half-plane, and its time-domain evolution demonstrates a decaying behavior, with ... |
1312.0703 | Hyeong-Chan Kim | Hyeong-Chan Kim | Origin of the universe: A hint from Eddington-inspired Born-Infeld
gravity | Proceedings for IK13. 6 pages,1 figure | null | 10.3938/jkps.65.840 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the `initial state' of an anisotropic universe in Eddington-inspired
Born-Infeld gravity filled with a scalar field, whose potential has various
forms. With this purpose, the evolution of a spatially-flat, homogeneous
anisotropic Kasner universe is studied. We find an exact evolution of universe
for each sca... | [
{
"created": "Tue, 3 Dec 2013 05:49:08 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Kim",
"Hyeong-Chan",
""
]
] | We study the `initial state' of an anisotropic universe in Eddington-inspired Born-Infeld gravity filled with a scalar field, whose potential has various forms. With this purpose, the evolution of a spatially-flat, homogeneous anisotropic Kasner universe is studied. We find an exact evolution of universe for each scala... |
1005.2682 | T. P. Singh | T. P. Singh | The connection between `emergence of time from quantum gravity' and
`dynamical collapse of the wave-function in quantum mechanics' | 6 pages. References updated. To appear in Int. J. Mod. Phys. D
[special issue] | Int.J.Mod.Phys.D19:2265-2269,2010 | 10.1142/S0218271810018335 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are various reasons to believe that quantum theory could be an emergent
phenomenon. Trace Dynamics is an underlying classical dynamics of non-commuting
matrices, from which quantum theory and classical mechanics have been shown to
emerge, in the thermodynamic approximation. However, the time that is used to
des... | [
{
"created": "Sat, 15 May 2010 15:07:44 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Oct 2010 17:32:57 GMT",
"version": "v2"
}
] | 2011-01-25 | [
[
"Singh",
"T. P.",
""
]
] | There are various reasons to believe that quantum theory could be an emergent phenomenon. Trace Dynamics is an underlying classical dynamics of non-commuting matrices, from which quantum theory and classical mechanics have been shown to emerge, in the thermodynamic approximation. However, the time that is used to descr... |
2006.09148 | S K Narasimhamurthy | H. M. Manjunatha, S. K. Narasimhamurthy, Z. Nekouee | The gravitational field of the SdS space-time | 11 pages, 6 figures | Int. J. Geom. Methods Mod. Phys. 17, 2050069 (2020) | 10.1142/S0219887820500693 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of this paper is to study SdS space-time and its gravitational field
with consideration of the canonical form and invariants of the curvature
tensor. The characteristic of $\lambda$-tensor identifies the type of
gravitational field. Gaussian curvature quantities enunciated in terms of
curvature invariants.
| [
{
"created": "Sun, 14 Jun 2020 12:09:23 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2020 11:05:30 GMT",
"version": "v2"
}
] | 2020-06-18 | [
[
"Manjunatha",
"H. M.",
""
],
[
"Narasimhamurthy",
"S. K.",
""
],
[
"Nekouee",
"Z.",
""
]
] | The goal of this paper is to study SdS space-time and its gravitational field with consideration of the canonical form and invariants of the curvature tensor. The characteristic of $\lambda$-tensor identifies the type of gravitational field. Gaussian curvature quantities enunciated in terms of curvature invariants. |
gr-qc/9808011 | Desmond Johnston | P. Bialas, Z. Burda and D. Johnston | Phase diagram of the mean field model of simplicial gravity | 15 pages, 5 figures | Nucl.Phys. B542 (1999) 413-424 | 10.1016/S0550-3213(98)00842-6 | HWM98-27 | gr-qc cond-mat.stat-mech hep-lat | null | We discuss the phase diagram of the balls in boxes model, with a varying
number of boxes. The model can be regarded as a mean-field model of simplicial
gravity. We analyse in detail the case of weights of the form $p(q) =
q^{-\beta}$, which correspond to the measure term introduced in the simplicial
quantum gravity s... | [
{
"created": "Tue, 4 Aug 1998 14:45:55 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Bialas",
"P.",
""
],
[
"Burda",
"Z.",
""
],
[
"Johnston",
"D.",
""
]
] | We discuss the phase diagram of the balls in boxes model, with a varying number of boxes. The model can be regarded as a mean-field model of simplicial gravity. We analyse in detail the case of weights of the form $p(q) = q^{-\beta}$, which correspond to the measure term introduced in the simplicial quantum gravity sim... |
1410.6480 | Juri Smirnov | Juri Smirnov | Gauge-Invariant Average of Einstein Equations for finite Volumes | 14 pages, 2 figures, resolves problem of gauge dependence | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the study of cosmological backreacktion an avaragng procedure is
required. In this work a covariant and gauge invariant averaging formalism for
finite volumes will be developed. This averaging will be applied to the scalar
parts of Einstein's equations. For this purpose dust as a physical laboratory
will be coupl... | [
{
"created": "Thu, 23 Oct 2014 20:00:04 GMT",
"version": "v1"
}
] | 2014-10-27 | [
[
"Smirnov",
"Juri",
""
]
] | For the study of cosmological backreacktion an avaragng procedure is required. In this work a covariant and gauge invariant averaging formalism for finite volumes will be developed. This averaging will be applied to the scalar parts of Einstein's equations. For this purpose dust as a physical laboratory will be coupled... |
1404.5284 | Martin Bojowald | Martin Bojowald | Fluctuation energies in quantum cosmology | 35 pages, 6 figures | Phys. Rev. D 89, 124031 (2014) | 10.1103/PhysRevD.89.124031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum fluctuations or other moments of a state contribute to energy
expectation values and can imply interesting physical effects. In quantum
cosmology, they turn out to be important for a discussion of density bounds and
instabilities of initial-value problems in the presence of signature change in
loop-quantized ... | [
{
"created": "Mon, 21 Apr 2014 19:44:04 GMT",
"version": "v1"
}
] | 2014-07-02 | [
[
"Bojowald",
"Martin",
""
]
] | Quantum fluctuations or other moments of a state contribute to energy expectation values and can imply interesting physical effects. In quantum cosmology, they turn out to be important for a discussion of density bounds and instabilities of initial-value problems in the presence of signature change in loop-quantized mo... |
1307.1683 | Istvan Racz | Istv\'an R\'acz | Stationary Black Holes as Holographs II | 35 pages, substantially extended introduction, added references,
conclusions unchanged, to appear in CQG | Class. Quantum Grav. 31 035006 2014 | 10.1088/0264-9381/31/3/035006 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Smooth four-dimensional electrovac spacetimes in Einstein's theory are
considered each possessing a pair of null hypersurfaces, $H_1$ and $H_2$,
generated by expansion and shear free geodesically complete null congruences
such that they intersect on a two-dimensional spacelike surface, $Z=H_1\cap
H_2$. By making use ... | [
{
"created": "Fri, 5 Jul 2013 18:15:13 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Nov 2013 08:31:31 GMT",
"version": "v2"
}
] | 2015-01-16 | [
[
"Rácz",
"István",
""
]
] | Smooth four-dimensional electrovac spacetimes in Einstein's theory are considered each possessing a pair of null hypersurfaces, $H_1$ and $H_2$, generated by expansion and shear free geodesically complete null congruences such that they intersect on a two-dimensional spacelike surface, $Z=H_1\cap H_2$. By making use of... |
1601.02171 | Kent Yagi | Kent Yagi and Nicolas Yunes | I-Love-Q Relations: From Compact Stars to Black Holes | 36 pages, 10 figures; minor modifications, typos corrected; published
in CQG | Class. Quant. Grav. 33, 095005 (2016) | 10.1088/0264-9381/33/9/095005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relations between most observables associated with a compact star, such
as the mass and radius of a neutron star or a quark star, typically depend
strongly on their unknown internal structure. The I-Love-Q relations (between
the moment of inertia, the tidal deformability and the quadrupole moment) are
however app... | [
{
"created": "Sun, 10 Jan 2016 01:50:49 GMT",
"version": "v1"
},
{
"created": "Thu, 26 May 2016 18:02:42 GMT",
"version": "v2"
}
] | 2016-05-27 | [
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | The relations between most observables associated with a compact star, such as the mass and radius of a neutron star or a quark star, typically depend strongly on their unknown internal structure. The I-Love-Q relations (between the moment of inertia, the tidal deformability and the quadrupole moment) are however appro... |
1611.05295 | Sergiu I. Vacaru | Marcelo M. Amaral, Raymond Aschheim, Lauren\c{t}iu Bubuianu, Klee
Irwin, Sergiu I. Vacaru, Daniel Woolridge | Anamorphic Quasiperiodic Universes in Modified and Einstein Gravity with
Loop Quantum Gravity Corrections | latex2e, 11pt, 32 pages, v3 accepted to CQG with a new Appendix and
minor modifications following referee's requests | Class. Quantum Grav. 34 (2017) 185002 | 10.1088/1361-6382/aa828a | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of this work is to elaborate on new geometric methods of
constructing exact and parametric quasiperiodic solutions for anamorphic
cosmology models in modified gravity theories, MGTs, and general relativity,
GR. There exist previously studied generic off-diagonal and diagonalizable
cosmological metrics encodi... | [
{
"created": "Mon, 7 Nov 2016 11:59:11 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2017 02:38:39 GMT",
"version": "v2"
},
{
"created": "Sat, 5 Aug 2017 03:38:45 GMT",
"version": "v3"
}
] | 2017-10-24 | [
[
"Amaral",
"Marcelo M.",
""
],
[
"Aschheim",
"Raymond",
""
],
[
"Bubuianu",
"Laurenţiu",
""
],
[
"Irwin",
"Klee",
""
],
[
"Vacaru",
"Sergiu I.",
""
],
[
"Woolridge",
"Daniel",
""
]
] | The goal of this work is to elaborate on new geometric methods of constructing exact and parametric quasiperiodic solutions for anamorphic cosmology models in modified gravity theories, MGTs, and general relativity, GR. There exist previously studied generic off-diagonal and diagonalizable cosmological metrics encoding... |
1909.00168 | Tobias Reinhart | Tobias Reinhart and Nils Alex | Covariant Constructive Gravity | 6 pages. Prepared for Proceedings of the Fifteenth Marcel Grossmann
meeting (Rome, 1-7 July 2018), Session AT5, Constructive Gravity | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method of constructing perturbative equations of motion for the
geometric background of any given tensorial field theory. Requiring invariance
of the gravitational dynamics under spacetime diffeomorphisms leads to a PDE
system for the gravitational Lagrangian that can be solved by means of a power
series... | [
{
"created": "Sat, 31 Aug 2019 08:49:38 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Reinhart",
"Tobias",
""
],
[
"Alex",
"Nils",
""
]
] | We present a method of constructing perturbative equations of motion for the geometric background of any given tensorial field theory. Requiring invariance of the gravitational dynamics under spacetime diffeomorphisms leads to a PDE system for the gravitational Lagrangian that can be solved by means of a power series a... |
2202.04467 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel and Sergio B. Duarte | Anisotropic quark stars in $f(R)= R^{1+\epsilon}$ gravity | 10 pages, 4 figures, some references added, new figure added,
accepted for publication in Classical and Quantum Gravity | Class. Quantum Grav. 39 (2022) 155003 | 10.1088/1361-6382/ac7a88 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the metric formalism of $f(R)$ theories of gravity, where $R$ is the
Ricci scalar, we study the hydrostatic equilibrium structure of compact stars
with the inclusion of anisotropic pressure. In particular, we focus on the
$f(R)= R^{1+\epsilon}$ model and we examine small deviations from General
Relativity (GR)... | [
{
"created": "Wed, 9 Feb 2022 13:53:01 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2022 02:26:28 GMT",
"version": "v2"
}
] | 2022-07-11 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Duarte",
"Sergio B.",
""
]
] | Within the metric formalism of $f(R)$ theories of gravity, where $R$ is the Ricci scalar, we study the hydrostatic equilibrium structure of compact stars with the inclusion of anisotropic pressure. In particular, we focus on the $f(R)= R^{1+\epsilon}$ model and we examine small deviations from General Relativity (GR) f... |
1301.4532 | Sourav Bhattacharya | Sourav Bhattacharya and Amitabha Lahiri | Mass function and particle creation in Schwarzschild-de Sitter spacetime | v3, 16pp; added references and discussions, typo corrected; accepted
in Eur. Phys. J. C | null | 10.1140/epjc/s10052-013-2673-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a mass or energy function for the non-Nariai class
Schwarzschild-de Sitter black hole spacetime in the region between the black
hole and the cosmological event horizons. The mass function is local, positive
definite, continuous and increases monotonically with the radial distance from
the black hole even... | [
{
"created": "Sat, 19 Jan 2013 05:13:05 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Oct 2013 09:07:26 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Dec 2013 12:57:43 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Lahiri",
"Amitabha",
""
]
] | We construct a mass or energy function for the non-Nariai class Schwarzschild-de Sitter black hole spacetime in the region between the black hole and the cosmological event horizons. The mass function is local, positive definite, continuous and increases monotonically with the radial distance from the black hole event ... |
2011.04911 | Gabriele Umberto Varieschi | Gabriele U. Varieschi | Newtonian Fractional-Dimension Gravity and Rotationally Supported
Galaxies | 19 pages, including 6 figures. Third paper on NFDG. Added Appendix A,
references, and other minor changes and corrections. Final version to be
published in the Monthly Notices of the Royal Astronomical Society, Oxford
Academic. arXiv admin note: text overlap with arXiv:2008.04737 | null | 10.1093/mnras/stab433 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue our analysis of Newtonian Fractional-Dimension Gravity, an
extension of the standard laws of Newtonian gravity to lower dimensional spaces
including those with fractional (i.e., non-integer) dimension. We apply our
model to three rotationally supported galaxies: NGC 7814 (Bulge-Dominated
Spiral), NGC 6503... | [
{
"created": "Mon, 9 Nov 2020 07:03:30 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 02:23:23 GMT",
"version": "v2"
}
] | 2021-02-24 | [
[
"Varieschi",
"Gabriele U.",
""
]
] | We continue our analysis of Newtonian Fractional-Dimension Gravity, an extension of the standard laws of Newtonian gravity to lower dimensional spaces including those with fractional (i.e., non-integer) dimension. We apply our model to three rotationally supported galaxies: NGC 7814 (Bulge-Dominated Spiral), NGC 6503 (... |
2012.14418 | Micha{\l} Eckstein | Erik Aurell, Micha{\l} Eckstein, Pawe{\l} Horodecki | Quantum information in Hawking radiation | 13 pages, 1 figure. Version published in JCAP | JCAP01(2022)014 | 10.1088/1475-7516/2022/01/014 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | In 1974 Steven Hawking showed that black holes emit thermal radiation, which
eventually causes them to evaporate. The problem of the fate of information in
this process is known as the "black hole information paradox". Two main types
of resolution postulate either a fundamental loss of information in Nature --
hence ... | [
{
"created": "Mon, 28 Dec 2020 18:55:15 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Feb 2022 10:32:07 GMT",
"version": "v2"
}
] | 2022-02-09 | [
[
"Aurell",
"Erik",
""
],
[
"Eckstein",
"Michał",
""
],
[
"Horodecki",
"Paweł",
""
]
] | In 1974 Steven Hawking showed that black holes emit thermal radiation, which eventually causes them to evaporate. The problem of the fate of information in this process is known as the "black hole information paradox". Two main types of resolution postulate either a fundamental loss of information in Nature -- hence th... |
1209.2346 | Mir Faizal | Mir Faizal | Super-Group Field Cosmology | 14 pages, 0 figures, accepted for publication in Class. Quant. Grav | Class. Quant. Grav. 29: 215009, 2012 | 10.1088/0264-9381/29/21/215009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct a model for group field cosmology. The classical
equations of motion for the non-interactive part of this model generate the
Hamiltonian constraint of loop quantum gravity for a homogeneous isotropic
universe filled with a scalar matter field. The interactions represent topology
changing pr... | [
{
"created": "Tue, 11 Sep 2012 15:21:44 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2012 10:09:04 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Faizal",
"Mir",
""
]
] | In this paper we construct a model for group field cosmology. The classical equations of motion for the non-interactive part of this model generate the Hamiltonian constraint of loop quantum gravity for a homogeneous isotropic universe filled with a scalar matter field. The interactions represent topology changing proc... |
gr-qc/0606127 | Mark Rupright | Mark E. Rupright | Spherical Harmonic Amplitudes From Grid Data | 14 pages, 4 figures | null | null | null | gr-qc physics.comp-ph | null | The problem of resolving spherical harmonic components from numerical data
defined on a rectangular grid has many applications, particularly for the
problem of gravitational radiation extraction. A novel method due to Misner
improves on traditional techniques by avoiding the need to cover the sphere
with a coordinate... | [
{
"created": "Thu, 29 Jun 2006 15:32:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rupright",
"Mark E.",
""
]
] | The problem of resolving spherical harmonic components from numerical data defined on a rectangular grid has many applications, particularly for the problem of gravitational radiation extraction. A novel method due to Misner improves on traditional techniques by avoiding the need to cover the sphere with a coordinate s... |
2208.06259 | Gregory B. Cook | Daniel J. Vickers and Gregory B. Cook | Understanding solutions of the angular Teukolsky equation in the prolate
asymptotic limit | 34 pages, 30 figures, 16 tables : fixed typos and other minor errors | Phys. Rev. D 106, 104037 (2022) | 10.1103/PhysRevD.106.104037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solutions to the Angular Teukolsky Equation have been used to solve various
applied problems in physics and are extremely important to black-hole physics,
particularly in computing quasinormal modes and in the extreme-mass-ratio
inspiral problem. The eigenfunctions of this equation, known as spin-weighted
spheroidal ... | [
{
"created": "Fri, 12 Aug 2022 13:12:47 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2022 16:38:19 GMT",
"version": "v2"
}
] | 2022-11-18 | [
[
"Vickers",
"Daniel J.",
""
],
[
"Cook",
"Gregory B.",
""
]
] | Solutions to the Angular Teukolsky Equation have been used to solve various applied problems in physics and are extremely important to black-hole physics, particularly in computing quasinormal modes and in the extreme-mass-ratio inspiral problem. The eigenfunctions of this equation, known as spin-weighted spheroidal fu... |
1408.0860 | Ryan Lang | Ryan N. Lang | Gravitational radiation from compact binaries in scalar-tensor gravity | 7 pages, submitted to the proceedings of the 10th International LISA
Symposium | null | 10.1088/1742-6596/610/1/012045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity (GR) has been extensively tested in the solar system and
in binary pulsars, but never in the strong-field, dynamical regime. Soon,
gravitational-wave (GW) detectors like Advanced LIGO and eLISA will be able to
probe this regime by measuring GWs from inspiraling and merging compact
binaries. One par... | [
{
"created": "Tue, 5 Aug 2014 04:21:55 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Lang",
"Ryan N.",
""
]
] | General relativity (GR) has been extensively tested in the solar system and in binary pulsars, but never in the strong-field, dynamical regime. Soon, gravitational-wave (GW) detectors like Advanced LIGO and eLISA will be able to probe this regime by measuring GWs from inspiraling and merging compact binaries. One parti... |
2012.13828 | Alireza Olamaei | A. Bazrafshan and A. R. Olamaei | Surface Terms of Quintic Quasitopological Gravity and Thermodynamics of
Quasi-Topological Magnetic Brane Coupled to Nonlinear Electrodynamics | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the the quintic quasitopological action which has no well-defined
variational principle, we introduced a surface term that for a spacetime with
flat boundaries make the action well-defined. Moreover, we investigated the
numerical solutions of the above-mentioned gravity coupled to the nonlinear
logarithmic and ex... | [
{
"created": "Sat, 26 Dec 2020 23:00:27 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2020 20:57:22 GMT",
"version": "v2"
},
{
"created": "Tue, 18 May 2021 02:23:58 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Nov 2021 19:10:29 GMT",
"version": "v4"
},
{
"c... | 2021-11-23 | [
[
"Bazrafshan",
"A.",
""
],
[
"Olamaei",
"A. R.",
""
]
] | For the the quintic quasitopological action which has no well-defined variational principle, we introduced a surface term that for a spacetime with flat boundaries make the action well-defined. Moreover, we investigated the numerical solutions of the above-mentioned gravity coupled to the nonlinear logarithmic and expo... |
0903.4342 | Tomasz Konopka | Tomasz Konopka | Matter in Toy Dynamical Geometries | 8 pages, 1 figure, paper presented at DICE 2008 | J.Phys.Conf.Ser.174:012051,2009 | 10.1088/1742-6596/174/1/012051 | ITP-UU-08/13, SPIN-08/12 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the objectives of theories describing quantum dynamical geometry is to
compute expectation values of geometrical observables. The results of such
computations can be affected by whether or not matter is taken into account. It
is thus important to understand to what extent and to what effect matter can
affect d... | [
{
"created": "Wed, 25 Mar 2009 14:06:02 GMT",
"version": "v1"
}
] | 2009-07-24 | [
[
"Konopka",
"Tomasz",
""
]
] | One of the objectives of theories describing quantum dynamical geometry is to compute expectation values of geometrical observables. The results of such computations can be affected by whether or not matter is taken into account. It is thus important to understand to what extent and to what effect matter can affect dyn... |
gr-qc/0305055 | Joao Magueijo | Joao Magueijo and Lee Smolin | Gravity's Rainbow | Version to be published in Classical and Quantum Gravity | Class.Quant.Grav. 21 (2004) 1725-1736 | 10.1088/0264-9381/21/7/001 | null | gr-qc | null | Non-linear special relativity (or doubly special relativity) is a simple
framework for encoding properties of flat quantum space-time. In this paper we
show how this formalism may be generalized to incorporate curvature (leading to
what might be called ``doubly general relativity''). We first propose a dual to
non-li... | [
{
"created": "Wed, 14 May 2003 16:16:20 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Feb 2004 19:17:10 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Magueijo",
"Joao",
""
],
[
"Smolin",
"Lee",
""
]
] | Non-linear special relativity (or doubly special relativity) is a simple framework for encoding properties of flat quantum space-time. In this paper we show how this formalism may be generalized to incorporate curvature (leading to what might be called ``doubly general relativity''). We first propose a dual to non-line... |
1201.4742 | Ilya Kirnos Vasilyevich | A. N. Makarenko, V. V. Obukhov, I. V. Kirnos | From Big to Little Rip in modified F(R,G) gravity | 15 pages, 7 figures | null | 10.1007/s10509-012-1240-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the cosmological reconstruction in modified Gauss-Bonnet (GB)
gravity. It is demonstrated that the modified GB gravity may describe the most
interesting features of late-time cosmology. We derive explicit form of
effective phantom cosmological models ending by the finite-time future
singularity (Big Rip) a... | [
{
"created": "Mon, 23 Jan 2012 15:26:37 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2012 09:54:14 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Makarenko",
"A. N.",
""
],
[
"Obukhov",
"V. V.",
""
],
[
"Kirnos",
"I. V.",
""
]
] | We discuss the cosmological reconstruction in modified Gauss-Bonnet (GB) gravity. It is demonstrated that the modified GB gravity may describe the most interesting features of late-time cosmology. We derive explicit form of effective phantom cosmological models ending by the finite-time future singularity (Big Rip) and... |
gr-qc/0204023 | Richard Drociuk | Richard Drociuk | Cosmic Force | 13 pages | null | null | null | gr-qc | null | The determination of the geodesics in Scharzschild black hole and de Sitter
space.
| [
{
"created": "Fri, 5 Apr 2002 02:07:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Drociuk",
"Richard",
""
]
] | The determination of the geodesics in Scharzschild black hole and de Sitter space. |
2303.18026 | Maarten van de Meent | Maarten van de Meent, Alessandra Buonanno, Deyan P. Mihaylov, Serguei
Ossokine, Lorenzo Pompili, Niels Warburton, Adam Pound, Barry Wardell, Leanne
Durkan, Jeremy Miller | Enhancing the SEOBNRv5 effective-one-body waveform model with
second-order gravitational self-force fluxes | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We leverage recent breakthrough calculations using second-order gravitational
self-force (2GSF) theory to improve both the gravitational-mode amplitudes and
radiation-reaction force in effective-one-body~(EOB) waveform models. We
achieve this by introducing new calibration parameters in the SEOBNRv5HM mode
amplitudes... | [
{
"created": "Fri, 31 Mar 2023 13:04:45 GMT",
"version": "v1"
}
] | 2023-04-03 | [
[
"van de Meent",
"Maarten",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Mihaylov",
"Deyan P.",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Pompili",
"Lorenzo",
""
],
[
"Warburton",
"Niels",
""
],
[
"Pound",
"Adam",
... | We leverage recent breakthrough calculations using second-order gravitational self-force (2GSF) theory to improve both the gravitational-mode amplitudes and radiation-reaction force in effective-one-body~(EOB) waveform models. We achieve this by introducing new calibration parameters in the SEOBNRv5HM mode amplitudes, ... |
gr-qc/9906104 | Hans Kastrup | H.A. Kastrup (RWTH Aachen, Germany) | Schwarzschild Black Hole Quantum Statistics from Z(2) Orientation
Degrees of Freedom and its Relations to Ising Droplet Nucleation | 29 pages, Latex; version to appear in Annalen der Physik (Leipzig)
(Refs. added, a few text improvements, no changes of results) | Annalen Phys. 9 (2000) 503-522 | 10.1002/1521-3889(200007)9:7<503::AID-ANDP503>3.0.CO;2-L | PITHA 99/18 | gr-qc cond-mat.stat-mech hep-th | null | Generalizing previous quantum gravity results for Schwarzschild black holes
from 4 to D > 3 space-time dimensions yields an energy spectrum E_n = alpha
n^{(D-3)/(D-2)} E_P, n=1,2,..., alpha = O(1), where E_P is the Planck energy in
that space-time. This spectrum means that the quantized area A_{D-2}(n) of the
D-2 dim... | [
{
"created": "Thu, 24 Jun 1999 18:03:45 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 1999 15:24:02 GMT",
"version": "v2"
},
{
"created": "Thu, 4 May 2000 14:44:58 GMT",
"version": "v3"
}
] | 2017-09-27 | [
[
"Kastrup",
"H. A.",
"",
"RWTH Aachen, Germany"
]
] | Generalizing previous quantum gravity results for Schwarzschild black holes from 4 to D > 3 space-time dimensions yields an energy spectrum E_n = alpha n^{(D-3)/(D-2)} E_P, n=1,2,..., alpha = O(1), where E_P is the Planck energy in that space-time. This spectrum means that the quantized area A_{D-2}(n) of the D-2 dimen... |
gr-qc/9508031 | Amitabha Lahiri | E.J.Copeland and Amitabha Lahiri (University of Sussex) | How is a Closed String Loop like a Black Hole? | 6 pages, uses harvmac | Class.Quant.Grav.12:L113-L118,1995 | 10.1088/0264-9381/12/12/002 | SUSX-TH-95/33 | gr-qc hep-th | null | We demonstrate that under plausible assumptions the entropy and temperature
associated with the small oscillations on a circular loop of radius $R$ and a
black hole of mass $M=R/2G$ are identical.
| [
{
"created": "Mon, 14 Aug 1995 15:48:51 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Copeland",
"E. J.",
"",
"University of Sussex"
],
[
"Lahiri",
"Amitabha",
"",
"University of Sussex"
]
] | We demonstrate that under plausible assumptions the entropy and temperature associated with the small oscillations on a circular loop of radius $R$ and a black hole of mass $M=R/2G$ are identical. |
1410.6183 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola and Aureliano Skirzewski | A polynomial model of purely affine gravity | 13 pages. V3: Corresponds to the published version | Rev. Mex. Fis. 61 (2015) 6, 421 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a purely affine gravitational model in four dimensions built up
entirely on the bases of full diffeomorphism invariance, and power- counting
renormalizability. We show that its non-relativistic limit around a homogeneous
and isotropic spacetime yields to a Newtonian gravity.
| [
{
"created": "Wed, 22 Oct 2014 20:43:18 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Feb 2015 19:48:57 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Jul 2016 15:30:02 GMT",
"version": "v3"
}
] | 2016-07-05 | [
[
"Castillo-Felisola",
"Oscar",
""
],
[
"Skirzewski",
"Aureliano",
""
]
] | We present a purely affine gravitational model in four dimensions built up entirely on the bases of full diffeomorphism invariance, and power- counting renormalizability. We show that its non-relativistic limit around a homogeneous and isotropic spacetime yields to a Newtonian gravity. |
gr-qc/0411126 | Krzysztof Bolejko | Krzysztof Bolejko, Andrzej Krasinski, Charles Hellaby | Formation of voids in the Universe within the Lemaitre-Tolman model | MN2e LaTeX style file, 17 pages, 16 figures, 22 figure files;
replecement has minor changes in references | Mon.Not.Roy.Astron.Soc.362:213-228,2005 | 10.1111/j.1365-2966.2005.09292.x | null | gr-qc astro-ph | null | We develop models of void formation starting from a small initial fluctuation
at recombination and growing to a realistic present day density profile in
agreement with observations of voids. The model construction is an extension of
previously developed algorithms for finding a Lemaitre-Tolman metric that
evolves bet... | [
{
"created": "Fri, 26 Nov 2004 14:19:43 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Nov 2004 12:44:08 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bolejko",
"Krzysztof",
""
],
[
"Krasinski",
"Andrzej",
""
],
[
"Hellaby",
"Charles",
""
]
] | We develop models of void formation starting from a small initial fluctuation at recombination and growing to a realistic present day density profile in agreement with observations of voids. The model construction is an extension of previously developed algorithms for finding a Lemaitre-Tolman metric that evolves betwe... |
0711.2543 | Ramin Nowbakht Ghalati | R. N. Ghalati, D. G. C. McKeon | A Canonical Analysis of the First Order Einstein-Hilbert Action | null | null | null | UWO-TH-07/17 | gr-qc hep-th | null | The Dirac constraint formalism is applied to the d(d>2) dimensional
Einstein-Hilbert action when written in first order form, using the metric
density and affine connection as independent fields. Field equations not
involving time derivatives are not used to eliminate fields. Primary, secondary
and tertiary constrain... | [
{
"created": "Fri, 16 Nov 2007 01:47:40 GMT",
"version": "v1"
}
] | 2007-11-19 | [
[
"Ghalati",
"R. N.",
""
],
[
"McKeon",
"D. G. C.",
""
]
] | The Dirac constraint formalism is applied to the d(d>2) dimensional Einstein-Hilbert action when written in first order form, using the metric density and affine connection as independent fields. Field equations not involving time derivatives are not used to eliminate fields. Primary, secondary and tertiary constraints... |
1306.3028 | Jia-An Lu | Jia-An Lu, Chao-Guang Huang | Kaluza--Klein-type models of de Sitter and Poincar\'e gauge theories of
gravity | 21 pages | Class. Quantum Grav. 2013 30 145004 | 10.1088/0264-9381/30/14/145004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct Kaluza--Klein-type models with a de Sitter or Minkowski bundle
in the de Sitter or Poincar\'e gauge theory of gravity, respectively. A
manifestly gauge-invariant formalism has been given. The gravitational dynamics
is constructed by the geometry of the de Sitter or Minkowski bundle and a
global section w... | [
{
"created": "Thu, 13 Jun 2013 05:44:12 GMT",
"version": "v1"
}
] | 2013-06-14 | [
[
"Lu",
"Jia-An",
""
],
[
"Huang",
"Chao-Guang",
""
]
] | We construct Kaluza--Klein-type models with a de Sitter or Minkowski bundle in the de Sitter or Poincar\'e gauge theory of gravity, respectively. A manifestly gauge-invariant formalism has been given. The gravitational dynamics is constructed by the geometry of the de Sitter or Minkowski bundle and a global section whi... |
0707.2854 | Francesco Cianfrani dr | Francesco Cianfrani, Giovanni Montani | Boost invariance of the gravitational field dynamics: quantization
without time gauge | 9 pages, accepted for publication on Classical and Quantum Gravity | Class.Quant.Grav.24:4161-4168,2007 | 10.1088/0264-9381/24/16/011 | null | gr-qc | null | We perform a canonical quantization of gravity in a second-order formulation,
taking as configuration variables those describing a 4-bein, not adapted to the
space-time splitting. We outline how, neither if we fix the Lorentz frame
before quantizing, nor if we perform no gauge fixing at all, is invariance
under boost... | [
{
"created": "Thu, 19 Jul 2007 09:14:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
]
] | We perform a canonical quantization of gravity in a second-order formulation, taking as configuration variables those describing a 4-bein, not adapted to the space-time splitting. We outline how, neither if we fix the Lorentz frame before quantizing, nor if we perform no gauge fixing at all, is invariance under boost t... |
gr-qc/0111054 | Serguei Krasnikov | S. Krasnikov | No time machines in classical general relativity | A corrigendum (to be published in CQG) has been added to correct an
important mistake in the definition of locality | Class.Quant.Grav. 19 (2002) 4109 | 10.1088/0264-9381/19/15/316 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Irrespective of local conditions imposed on the metric, any extendible
spacetime U has a maximal extension containing no closed causal curves outside
the chronological past of U. We prove this fact and interpret it as
impossibility (in classical general relativity) of the time machines, insofar
as the latter are defi... | [
{
"created": "Sat, 17 Nov 2001 01:25:13 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2002 11:55:10 GMT",
"version": "v2"
},
{
"created": "Sun, 4 Aug 2002 13:55:06 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Feb 2014 09:34:11 GMT",
"version": "v4"
}
] | 2014-02-14 | [
[
"Krasnikov",
"S.",
""
]
] | Irrespective of local conditions imposed on the metric, any extendible spacetime U has a maximal extension containing no closed causal curves outside the chronological past of U. We prove this fact and interpret it as impossibility (in classical general relativity) of the time machines, insofar as the latter are define... |
gr-qc/9503056 | Guillermo Mena | Nenad Manojlovic and Guillermo A. Mena Marugan | CANONICAL QUANTIZATION OF THE BELINSKII-ZAKHAROV ONE-SOLITON SOLUTIONS | 27 pages, latex, no figures. | Int.J.Mod.Phys.D4:749-766,1995 | 10.1142/S0218271895000508 | IMAFF-RC-03-95 | gr-qc | null | We apply the algebraic quantization programme proposed by Ashtekar to the
analysis of the Belinski\v{\i}-Zakharov classical spacetimes, obtained from the
Kasner metrics by means of a generalized soliton transformation. When the
solitonic parameters associated with this transformation are frozen, the
resulting Belinsk... | [
{
"created": "Wed, 29 Mar 1995 13:30:20 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Manojlovic",
"Nenad",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
]
] | We apply the algebraic quantization programme proposed by Ashtekar to the analysis of the Belinski\v{\i}-Zakharov classical spacetimes, obtained from the Kasner metrics by means of a generalized soliton transformation. When the solitonic parameters associated with this transformation are frozen, the resulting Belinski\... |
2008.13201 | Tanmoy Paul | S. D. Odintsov, V. K. Oikonomou, Tanmoy Paul | Bottom-up reconstruction of non-singular bounce in F(R) gravity from
observational indices | Nuclear Physics B accepted | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the bottom-up reconstruction technique in the context of bouncing
cosmology in F(R) gravity, where the starting point is a suitable ansatz of
observable quantity (like spectral index or tensor to scalar ratio) rather than
a priori form of Hubble parameter. In inflationary scenario, the slow roll
conditions a... | [
{
"created": "Sun, 30 Aug 2020 15:45:06 GMT",
"version": "v1"
}
] | 2020-09-01 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | We apply the bottom-up reconstruction technique in the context of bouncing cosmology in F(R) gravity, where the starting point is a suitable ansatz of observable quantity (like spectral index or tensor to scalar ratio) rather than a priori form of Hubble parameter. In inflationary scenario, the slow roll conditions are... |
1104.3484 | Lucila Kraiselburd | Lucila Kraiselburd, Marcelo Miller Bertolami, Pablo Sisterna and
H\'ector Vucetich | Energy production in varying {\alpha} theories | null | Astronomy & Astrophysics 529 (2011) 125 | 10.1051/0004-6361/201015970 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aims. On the basis the theoretical model proposed by Bekenstein for
{\alpha}'s variation, we analyze the equations that describe the energy
exchange between matter and both the electromagnetic and the scalar fields.
Methods. We determine how the energy flow of the material is modified by the
presence of a scalar fiel... | [
{
"created": "Mon, 18 Apr 2011 13:51:07 GMT",
"version": "v1"
}
] | 2011-04-19 | [
[
"Kraiselburd",
"Lucila",
""
],
[
"Bertolami",
"Marcelo Miller",
""
],
[
"Sisterna",
"Pablo",
""
],
[
"Vucetich",
"Héctor",
""
]
] | Aims. On the basis the theoretical model proposed by Bekenstein for {\alpha}'s variation, we analyze the equations that describe the energy exchange between matter and both the electromagnetic and the scalar fields. Methods. We determine how the energy flow of the material is modified by the presence of a scalar field.... |
gr-qc/0101095 | Claus Laemmerzahl | Claus L\"ammerzahl and Christian J. Bord\'e | Testing the Dirac equation | 11 pages. to appear in: C. L\"ammerzahl, C.W.F. Everitt, and F.W.
Hehl (eds.): Gyros, Clocks, Interferometers...: Testing Relativistic Gravity
in Space, Lecture Notes in Physics 562, Springer 2001 | Lect.Notes Phys. 562 (2001) 463-478 | 10.1007/3-540-40988-2_24 | null | gr-qc | null | The dynamical equations which are basic for the description of the dynamics
of quantum felds in arbitrary space--time geometries, can be derived from the
requirements of a unique deterministic evolution of the quantum fields, the
superposition principle, a finite propagation speed, and probability
conservation. We su... | [
{
"created": "Wed, 24 Jan 2001 13:36:12 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Lämmerzahl",
"Claus",
""
],
[
"Bordé",
"Christian J.",
""
]
] | The dynamical equations which are basic for the description of the dynamics of quantum felds in arbitrary space--time geometries, can be derived from the requirements of a unique deterministic evolution of the quantum fields, the superposition principle, a finite propagation speed, and probability conservation. We sugg... |
2209.02559 | Aofei Sang | Aofei Sang, Ming Zhang, Shao-Wen Wei and Jie Jiang | Splitting the Echoes of Black Holes in Einstein-nonlinear Electrodynamic
Theories | 7 pages, 6 figures, and 1 table; reference added, title changed | Eur.Phys.J.C 83 (2023) 4, 291 | 10.1140/epjc/s10052-023-11448-4 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Black hole echo is an important observable that can help us better understand
gravitational theories. We present that the non-linear electrodynamic black
holes can admit the multi-peak effective potential for the scalar
perturbations, which can give rise to the echoes. After choosing suitable
parameters, the effectiv... | [
{
"created": "Tue, 6 Sep 2022 15:11:01 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2022 08:15:10 GMT",
"version": "v2"
}
] | 2023-04-19 | [
[
"Sang",
"Aofei",
""
],
[
"Zhang",
"Ming",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Jiang",
"Jie",
""
]
] | Black hole echo is an important observable that can help us better understand gravitational theories. We present that the non-linear electrodynamic black holes can admit the multi-peak effective potential for the scalar perturbations, which can give rise to the echoes. After choosing suitable parameters, the effective ... |
1507.00680 | Andrea Maselli | Andrea Maselli, Paolo Pani, Leonardo Gualtieri and Valeria Ferrari | Rotating black holes in Einstein-Dilaton-Gauss-Bonnet gravity with
finite coupling | Minor bug fixed in the supplementary mathematica notebook | Phys. Rev. D 92, 083014 (2015) | 10.1103/PhysRevD.92.083014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Among various strong-curvature extensions to General Relativity,
Einstein-Dilaton-Gauss-Bonnet gravity stands out as the only nontrivial theory
containing quadratic curvature corrections while being free from the
Ostrogradsky instability to any order in the coupling parameter. We derive an
approximate stationary and ... | [
{
"created": "Thu, 2 Jul 2015 18:09:34 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 2015 12:56:19 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Mar 2018 06:23:07 GMT",
"version": "v3"
}
] | 2018-03-05 | [
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Ferrari",
"Valeria",
""
]
] | Among various strong-curvature extensions to General Relativity, Einstein-Dilaton-Gauss-Bonnet gravity stands out as the only nontrivial theory containing quadratic curvature corrections while being free from the Ostrogradsky instability to any order in the coupling parameter. We derive an approximate stationary and ax... |
1812.06373 | Miguel Cruz | Miguel Cruz and Samuel Lepe | Modeling holographic dark energy with particle and future horizons | 19 pages, no figures. To appear in Nuclear Physics B | Nucl. Phys. B 956, 115017 (2020) | 10.1016/j.nuclphysb.2020.115017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore some cosmological properties coming from the particle
and future horizons when are considered as candidates to model the dark energy
sector within a holographic context in a flat
Friedmann-Lemaitre-Robertson-Walker universe; we focus on some thermodynamics
characteristics of the resulting dark... | [
{
"created": "Sun, 16 Dec 2018 01:38:52 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Jan 2019 21:15:48 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Nov 2019 21:18:24 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Apr 2020 23:12:17 GMT",
"version": "v4"
}
] | 2020-04-29 | [
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
]
] | In this work we explore some cosmological properties coming from the particle and future horizons when are considered as candidates to model the dark energy sector within a holographic context in a flat Friedmann-Lemaitre-Robertson-Walker universe; we focus on some thermodynamics characteristics of the resulting dark e... |
2001.02025 | Bobby Eka Gunara | Bobby E. Gunara, Mulyanto, Rahmat H. Alineng, Fiki T. Akbar, and Hadi
Susanto | Static Spacetimes In Higher Dimensional Scalar-Torsion Theories With
Non-Minimal Derivative Coupling | Major revision: 28 pages, some authors added and reordered, no
figure, some sections added and updated. Comments are welcome | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a class of static spacetimes in higher dimensional
($D \ge 4$) scalar-torsion theories with non-minimal derivative coupling and
the scalar potential turned on. The spacetime is conformal to a product space
of a two-surface and a $(D-2)$-dimensional submanifold. Analyzing the equations
of mot... | [
{
"created": "Tue, 7 Jan 2020 13:36:37 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Nov 2022 22:50:32 GMT",
"version": "v2"
}
] | 2022-11-28 | [
[
"Gunara",
"Bobby E.",
""
],
[
"Mulyanto",
"",
""
],
[
"Alineng",
"Rahmat H.",
""
],
[
"Akbar",
"Fiki T.",
""
],
[
"Susanto",
"Hadi",
""
]
] | In this paper we consider a class of static spacetimes in higher dimensional ($D \ge 4$) scalar-torsion theories with non-minimal derivative coupling and the scalar potential turned on. The spacetime is conformal to a product space of a two-surface and a $(D-2)$-dimensional submanifold. Analyzing the equations of motio... |
1505.05021 | Joao Magueijo | Michele Arzano, Giulia Gubitosi, Joao Magueijo and Giovanni
Amelino-Camelia | Vacuum fluctuations in theories with deformed dispersion relations | References added. Version to appear in Phys. Rev. D | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine vacuum fluctuations in theories with modified dispersion relations
which represent dimensional reduction at high energies. By changing units of
energy and momentum we can obtain a description rendering the dispersion
relations undeformed and transferring all the non-trivial effects to the
integration measu... | [
{
"created": "Tue, 19 May 2015 14:43:38 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jun 2015 19:56:18 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Arzano",
"Michele",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
],
[
"Amelino-Camelia",
"Giovanni",
""
]
] | We examine vacuum fluctuations in theories with modified dispersion relations which represent dimensional reduction at high energies. By changing units of energy and momentum we can obtain a description rendering the dispersion relations undeformed and transferring all the non-trivial effects to the integration measure... |
2303.02111 | Daniel Mayerson | Seppe Staelens, Daniel R. Mayerson, Fabio Bacchini, Bart Ripperda,
Lorenzo K\"uchler | Black Hole Photon Rings Beyond General Relativity | 31 pages + appendices; 20 figures | null | 10.1103/PhysRevD.107.124026 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate whether photon ring observations in black hole imaging are
able to distinguish between the Kerr black hole in general relativity and
alternative black holes that deviate from Kerr. Certain aspects of photon rings
have been argued to be robust observables in Very-Long-Baseline Interferometry
(VLBI) blac... | [
{
"created": "Fri, 3 Mar 2023 17:53:15 GMT",
"version": "v1"
}
] | 2023-06-28 | [
[
"Staelens",
"Seppe",
""
],
[
"Mayerson",
"Daniel R.",
""
],
[
"Bacchini",
"Fabio",
""
],
[
"Ripperda",
"Bart",
""
],
[
"Küchler",
"Lorenzo",
""
]
] | We investigate whether photon ring observations in black hole imaging are able to distinguish between the Kerr black hole in general relativity and alternative black holes that deviate from Kerr. Certain aspects of photon rings have been argued to be robust observables in Very-Long-Baseline Interferometry (VLBI) black ... |
gr-qc/0609122 | Alejandro Corichi | Alejandro Corichi, Jacobo Diaz-Polo and Enrique Fernandez-Borja | Black hole entropy quantization | 4 pages, 4 figures. Version to be published in PRL | Phys.Rev.Lett.98:181301,2007 | 10.1103/PhysRevLett.98.181301 | null | gr-qc hep-th | null | Ever since the pioneer works of Bekenstein and Hawking, black hole entropy
has been known to have a quantum origin. Furthermore, it has long been argued
by Bekenstein that entropy should be quantized in discrete (equidistant) steps
given its identification with horizon area in (semi-)classical general
relativity and ... | [
{
"created": "Tue, 26 Sep 2006 23:54:19 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2007 22:15:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
],
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Fernandez-Borja",
"Enrique",
""
]
] | Ever since the pioneer works of Bekenstein and Hawking, black hole entropy has been known to have a quantum origin. Furthermore, it has long been argued by Bekenstein that entropy should be quantized in discrete (equidistant) steps given its identification with horizon area in (semi-)classical general relativity and th... |
1408.5126 | Hassan Murad | Mohammad Hassan Murad, Saba Fatema | Some new Wyman-Adler type static relativistic charged anisotropic fluid
spheres compatible to self-bound stellar modeling | 17 pages, 9 figures, 4 tables. Some corrections have been made | null | null | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | In this work some families of relativistic anisotropic charged fluid spheres
have been obtained by solving Einstein-Maxwell field equations with preferred
form of one of the metric potentials, a suitable forms of electric charge
distribution and pressure anisotropy functions. The resulting equation of state
(EOS) of ... | [
{
"created": "Thu, 21 Aug 2014 06:58:40 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Sep 2014 05:55:06 GMT",
"version": "v2"
}
] | 2014-09-02 | [
[
"Murad",
"Mohammad Hassan",
""
],
[
"Fatema",
"Saba",
""
]
] | In this work some families of relativistic anisotropic charged fluid spheres have been obtained by solving Einstein-Maxwell field equations with preferred form of one of the metric potentials, a suitable forms of electric charge distribution and pressure anisotropy functions. The resulting equation of state (EOS) of th... |
1212.6289 | Hideyoshi Arakida | Hideyoshi Arakida | Note on the perihelion/periastron advance due to cosmological constant | 8 pages, 1 figure, accepted for publication in International Journal
of Theoretical Physics | null | 10.1007/s10773-012-1458-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We will comment on the perihelion/periastron advance of celestial bodies due
to the cosmological constant $\Lambda$. It is well known that the cosmological
constant $\Lambda$ causes the perihelion/periastron shift; however, there seems
to still exist a discrepancy among the various derived precession formulae. We
wil... | [
{
"created": "Thu, 27 Dec 2012 01:44:24 GMT",
"version": "v1"
}
] | 2013-01-01 | [
[
"Arakida",
"Hideyoshi",
""
]
] | We will comment on the perihelion/periastron advance of celestial bodies due to the cosmological constant $\Lambda$. It is well known that the cosmological constant $\Lambda$ causes the perihelion/periastron shift; however, there seems to still exist a discrepancy among the various derived precession formulae. We will ... |
2210.17462 | Maciej Maliborski | Piotr Bizo\'n and Maciej Maliborski | Comment on a regular black hole with Yang-Mills hair | 5 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment upon a black hole with Yang-Mills hair presented in a recent
preprint by Chen, Du, and Yau.
| [
{
"created": "Mon, 31 Oct 2022 16:40:34 GMT",
"version": "v1"
}
] | 2022-11-01 | [
[
"Bizoń",
"Piotr",
""
],
[
"Maliborski",
"Maciej",
""
]
] | We comment upon a black hole with Yang-Mills hair presented in a recent preprint by Chen, Du, and Yau. |
gr-qc/9301020 | Domenico Giulini | Domenico Giulini | On the configuration space topology in general relativity | Plain-Tex, 33 pages, no figures, Freiburg THEP-92/32 | Helv.Phys.Acta 68 (1995) 86-111 | null | null | gr-qc | null | The configuration-space topology in canonical General Relativity depends on
the choice of the initial data 3-manifold. If the latter is represented as a
connected sum of prime 3-manifolds, the topology receives contributions from
all configuration spaces associated to each individual prime factor. There are
by now st... | [
{
"created": "Mon, 25 Jan 1993 18:26:03 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Giulini",
"Domenico",
""
]
] | The configuration-space topology in canonical General Relativity depends on the choice of the initial data 3-manifold. If the latter is represented as a connected sum of prime 3-manifolds, the topology receives contributions from all configuration spaces associated to each individual prime factor. There are by now stro... |
2010.15818 | Conor O'Toole | Conor O'Toole, Adrian Ottewill, Barry Wardell | Characteristic formulation of the Regge-Wheeler and Zerilli Green
functions | v2. Added computation of gravitational flux. Added Zerilli Green
function. Corrected typos, updated figures. 11 pages, 8 figures | Phys. Rev. D 103, 124022 (2021) | 10.1103/PhysRevD.103.124022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a characteristic initial value approach to calculating the Green
function of the Regge-Wheeler and Zerilli equations. We combine well-known
numerical methods with newly derived initial data to obtain a scheme which can
in principle be generalised to any desired order of convergence. We demonstrate
the appr... | [
{
"created": "Thu, 29 Oct 2020 17:53:32 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Mar 2021 18:25:33 GMT",
"version": "v2"
}
] | 2021-06-16 | [
[
"O'Toole",
"Conor",
""
],
[
"Ottewill",
"Adrian",
""
],
[
"Wardell",
"Barry",
""
]
] | We present a characteristic initial value approach to calculating the Green function of the Regge-Wheeler and Zerilli equations. We combine well-known numerical methods with newly derived initial data to obtain a scheme which can in principle be generalised to any desired order of convergence. We demonstrate the approa... |
0810.4492 | Louis Crane | Louis Crane | Model Categories and Quantum Gravity | 19 pages latex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a mathematically concrete way of modelling the suggestion that in
quantum gravity the spacetime disappears, replacing it with a discrete
approximation to the causal path space described as an object in a model
category. One of the versions of our models appears as a thickening of
spacetime, which we interp... | [
{
"created": "Fri, 24 Oct 2008 15:49:21 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Oct 2008 13:32:44 GMT",
"version": "v2"
}
] | 2008-10-27 | [
[
"Crane",
"Louis",
""
]
] | We propose a mathematically concrete way of modelling the suggestion that in quantum gravity the spacetime disappears, replacing it with a discrete approximation to the causal path space described as an object in a model category. One of the versions of our models appears as a thickening of spacetime, which we interpre... |
1403.2767 | Raisa Galimova | Raisa Galimova | BKL conjecture in Bianchi VIII and IX with the ultrarelativistic fluid | 60 pages. arXiv admin note: text overlap with arXiv:1005.4908 by
other authors | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We rigorously verify that in the spatially homogeneous spacetimes (Bianchi
VIII and IX), the presence of matter does not affect the oscillatory behavior
of the solutions to the Einstein field equations as first conjectured by
Belinski, Khalatnikov, and Lifshitz (BKL) in 1970. This paper is an extension
of the paper b... | [
{
"created": "Tue, 11 Mar 2014 21:53:59 GMT",
"version": "v1"
}
] | 2014-03-13 | [
[
"Galimova",
"Raisa",
""
]
] | We rigorously verify that in the spatially homogeneous spacetimes (Bianchi VIII and IX), the presence of matter does not affect the oscillatory behavior of the solutions to the Einstein field equations as first conjectured by Belinski, Khalatnikov, and Lifshitz (BKL) in 1970. This paper is an extension of the paper by ... |
gr-qc/0506068 | Diego Meschini | Diego Meschini, Markku Lehto | Is empty spacetime a physical thing? | 21 pages, Latex. v2: Section 5 expanded | Found.Phys. 36 (2006) 1193-1216 | 10.1007/s10701-006-9058-8 | null | gr-qc | null | This article deals with empty spacetime and the question of its physical
reality. By "empty spacetime" we mean a collection of bare spacetime points,
the remains of ridding spacetime of all matter and fields. We ask whether these
geometric objects--themselves intrinsic to the concept of field--might be
observable thr... | [
{
"created": "Sat, 11 Jun 2005 12:15:44 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Oct 2005 16:02:44 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Meschini",
"Diego",
""
],
[
"Lehto",
"Markku",
""
]
] | This article deals with empty spacetime and the question of its physical reality. By "empty spacetime" we mean a collection of bare spacetime points, the remains of ridding spacetime of all matter and fields. We ask whether these geometric objects--themselves intrinsic to the concept of field--might be observable throu... |
1312.5332 | Claude Warnick | Gustav H. Holzegel and Claude M. Warnick | The Einstein-Klein-Gordon-AdS system for general boundary conditions | 42 pages; V2 Typos corrected | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct unique local solutions for the spherically-symmetric
Einstein-Klein-Gordon-AdS system subject to a large class of initial and
boundary conditions including some considered in the context of the AdS-CFT
correspondence. The proof relies on estimates developed for the linear wave
equation by the second auth... | [
{
"created": "Wed, 18 Dec 2013 21:00:19 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jul 2014 13:15:08 GMT",
"version": "v2"
}
] | 2014-07-29 | [
[
"Holzegel",
"Gustav H.",
""
],
[
"Warnick",
"Claude M.",
""
]
] | We construct unique local solutions for the spherically-symmetric Einstein-Klein-Gordon-AdS system subject to a large class of initial and boundary conditions including some considered in the context of the AdS-CFT correspondence. The proof relies on estimates developed for the linear wave equation by the second author... |
1307.1439 | Ranjan Sharma | Ranjan Sharma and B. S. Ratanpal | Relativistic stellar model admitting a quadratic equation of state | Accepted for publication in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D, v. 22, p. 1350074, 2013 | 10.1142/S0218271813500740 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of solutions describing the interior of a static spherically
symmetric compact anisotropic star is reported. The analytic solution has been
obtained by utilizing the Finch and Skea ({\it Class. Quant. Grav.} {\bf 6}
(1989) 467) ansatz for the metric potential $g_{rr}$ which has a clear
geometric interpretatio... | [
{
"created": "Tue, 2 Jul 2013 04:53:29 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Sharma",
"Ranjan",
""
],
[
"Ratanpal",
"B. S.",
""
]
] | A class of solutions describing the interior of a static spherically symmetric compact anisotropic star is reported. The analytic solution has been obtained by utilizing the Finch and Skea ({\it Class. Quant. Grav.} {\bf 6} (1989) 467) ansatz for the metric potential $g_{rr}$ which has a clear geometric interpretation ... |
1701.04957 | Li Zhao | Tao-Tao Sui, Li Zhao, Yu-Peng Zhang, Qun-Ying Xie | Localization and mass spectra of various matter fields on Weyl thin
brane | 15 pages, 11 figures, 1 table | Eur.Phys.J.C77 (2017) no.6, 411 | 10.1140/epjc/s10052-017-4922-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that the thin brane model in a five-dimensional Weyl
gravity can deal with the wrong-signed Friedmann-like equation in the
Randall--Sundrum-1 (RS1) model. In the Weyl brane model, there are also two
branes with opposite brane tensions, but the four-dimensional graviton (the
gravity zero mode) is loc... | [
{
"created": "Wed, 18 Jan 2017 05:54:47 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Jul 2017 13:54:36 GMT",
"version": "v2"
}
] | 2017-07-11 | [
[
"Sui",
"Tao-Tao",
""
],
[
"Zhao",
"Li",
""
],
[
"Zhang",
"Yu-Peng",
""
],
[
"Xie",
"Qun-Ying",
""
]
] | It has been shown that the thin brane model in a five-dimensional Weyl gravity can deal with the wrong-signed Friedmann-like equation in the Randall--Sundrum-1 (RS1) model. In the Weyl brane model, there are also two branes with opposite brane tensions, but the four-dimensional graviton (the gravity zero mode) is local... |
2405.04062 | Sebastian Garcia-Saenz | Sebastian Garcia-Saenz, Junjie Hua, Yunke Zhao | Geodesic completeness, cosmological bounces and inflation | 5 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question of geodesic completeness of cosmological spacetimes has recently
received renewed scrutiny. A particularly interesting result is the observation
that the well-known Borde-Guth-Vilenkin (BGV) theorem may misdiagnose
geodesically complete cosmologies. We propose a simple amendment to the BGV
theorem which ... | [
{
"created": "Tue, 7 May 2024 07:09:00 GMT",
"version": "v1"
}
] | 2024-05-08 | [
[
"Garcia-Saenz",
"Sebastian",
""
],
[
"Hua",
"Junjie",
""
],
[
"Zhao",
"Yunke",
""
]
] | The question of geodesic completeness of cosmological spacetimes has recently received renewed scrutiny. A particularly interesting result is the observation that the well-known Borde-Guth-Vilenkin (BGV) theorem may misdiagnose geodesically complete cosmologies. We propose a simple amendment to the BGV theorem which ad... |
2301.04342 | Telem Ibungochouba Singh | Yenshembam Priyobarta Singh, Telem Ibungochouba Singh | Massive vector particle tunneling from Kerr-Newman-de Sitter black hole
under generalized uncertainty principle | null | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | The quantum tunneling of charged massive vector boson particles across the
event horizon of Kerr-Newman-de Sitter black hole is investigated under the
influence of quantum gravity effects. The modified Hawking temperatures and
heat capacities across the event horizon of KNdS black hole are derived in
3-dimensional an... | [
{
"created": "Wed, 11 Jan 2023 07:37:32 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Mar 2023 05:59:39 GMT",
"version": "v2"
}
] | 2023-03-29 | [
[
"Singh",
"Yenshembam Priyobarta",
""
],
[
"Singh",
"Telem Ibungochouba",
""
]
] | The quantum tunneling of charged massive vector boson particles across the event horizon of Kerr-Newman-de Sitter black hole is investigated under the influence of quantum gravity effects. The modified Hawking temperatures and heat capacities across the event horizon of KNdS black hole are derived in 3-dimensional and ... |
2209.08056 | Torsten Asselmeyer-Maluga | Torsten Asselmeyer-Maluga, Jerzy Krol and Alissa Wilms | Big Bang and Topology | 20 pages, no figures | Symmetry 14(9):1887; September 2022 | 10.3390/sym14091887 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper we discuss the initial state of the universe at the Big Bang.
By using ideas of Freedman in the proof of the disk embedding theorem for
4-manifolds, we describe the corresponding spacetime as gravitational
instanton. The spatial space is a fractal space (wild embedded 3-sphere). Then
we construct the qu... | [
{
"created": "Wed, 14 Sep 2022 18:19:05 GMT",
"version": "v1"
}
] | 2022-09-19 | [
[
"Asselmeyer-Maluga",
"Torsten",
""
],
[
"Krol",
"Jerzy",
""
],
[
"Wilms",
"Alissa",
""
]
] | In this paper we discuss the initial state of the universe at the Big Bang. By using ideas of Freedman in the proof of the disk embedding theorem for 4-manifolds, we describe the corresponding spacetime as gravitational instanton. The spatial space is a fractal space (wild embedded 3-sphere). Then we construct the quan... |
gr-qc/0502048 | John W. Barrett | John W. Barrett | Feynman diagams coupled to three-dimensional quantum gravity | 7 pages. v2: minor corrections, added ref | Class.Quant.Grav. 23 (2006) 137-142 | 10.1088/0264-9381/23/1/008 | null | gr-qc hep-th | null | A framework for quantum field theory coupled to three-dimensional quantum
gravity is proposed. The coupling with quantum gravity regulates the Feynman
diagrams. One recovers the usual Feynman amplitudes in the limit as the
cosmological constant tends to zero.
| [
{
"created": "Thu, 10 Feb 2005 20:11:54 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Feb 2005 15:01:29 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Barrett",
"John W.",
""
]
] | A framework for quantum field theory coupled to three-dimensional quantum gravity is proposed. The coupling with quantum gravity regulates the Feynman diagrams. One recovers the usual Feynman amplitudes in the limit as the cosmological constant tends to zero. |
2407.18993 | Achintya Sajeendran | Achintya Sajeendran and Timothy C. Ralph | Controlled closed timelike geodesics in a rotating Alcubierre spacetime | 9 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present two modifications to the rotating Alcubierre metric [1], which was
shown to permit closed timelike curves (CTCs). We find that if the rotation
rate of the spacetime is made spatially dependent, in certain cases there exist
simple approximate timelike geodesics that are also CTCs, provided that the
velocity... | [
{
"created": "Fri, 26 Jul 2024 02:53:13 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Sajeendran",
"Achintya",
""
],
[
"Ralph",
"Timothy C.",
""
]
] | We present two modifications to the rotating Alcubierre metric [1], which was shown to permit closed timelike curves (CTCs). We find that if the rotation rate of the spacetime is made spatially dependent, in certain cases there exist simple approximate timelike geodesics that are also CTCs, provided that the velocity o... |
1203.3652 | Charles Hellaby | Charles Hellaby | A New Type of Exact Arbitrarily Inhomogeneous Cosmology: Evolution of
Deceleration in the Flat Homogeneous-On-Average Case | JCAP Latex, 14pp, 2 figures(2nd with 5 plots), 4 tables | Journal of Cosmology and Astroparticle Physics, JCAP01(2012)043 | 10.1088/1475-7516/2012/01/043 | uct-cosmology-2012-03-16 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new method for constructing exact inhomogeneous universes is presented,
that allows variation in 3 dimensions. The resulting spacetime may be
statistically uniform on average, or have random, non-repeating variation. The
construction utilises the Darmois junction conditions to join many different
component spacetim... | [
{
"created": "Fri, 16 Mar 2012 09:55:36 GMT",
"version": "v1"
}
] | 2012-03-19 | [
[
"Hellaby",
"Charles",
""
]
] | A new method for constructing exact inhomogeneous universes is presented, that allows variation in 3 dimensions. The resulting spacetime may be statistically uniform on average, or have random, non-repeating variation. The construction utilises the Darmois junction conditions to join many different component spacetime ... |
0711.0042 | Alexandru Ionescu | Alexandru D. Ionescu and Sergiu Klainerman | Uniqueness results for ill posed characteristic problems in curved
space-times | Various corrections | Commun.Math.Phys.285:873-900,2009 | 10.1007/s00220-008-0650-y | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove two uniqueness theorems for solutions of linear and nonlinear wave
equations; the first theorem is in the Minkowski space while the second is in
the domain of outer communication of a Kerr black hole. Both theorems concern
ill posed Cauchy problems on smooth, bifurcate, characteristic hypersurfaces.
In the c... | [
{
"created": "Wed, 31 Oct 2007 23:57:48 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jul 2008 21:24:11 GMT",
"version": "v2"
}
] | 2009-01-19 | [
[
"Ionescu",
"Alexandru D.",
""
],
[
"Klainerman",
"Sergiu",
""
]
] | We prove two uniqueness theorems for solutions of linear and nonlinear wave equations; the first theorem is in the Minkowski space while the second is in the domain of outer communication of a Kerr black hole. Both theorems concern ill posed Cauchy problems on smooth, bifurcate, characteristic hypersurfaces. In the cas... |
2206.12731 | Valeri Frolov P | Valeri P. Frolov and Alex Koek | Gravitational lensing, memory and the Penrose limit | 14 pages, 5 figures. 2 new references are added | null | 10.1103/PhysRevD.106.064026 | Alberta Thy 4-22 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we discuss the gravitational field of ultrarelativistic
extended spinning objects. For this purpose, we use a solution of the
linearized gravitational equations obtained in the frame where such an object
is translationally at rest, and boost this solution close to the speed of
light. In order to obtain... | [
{
"created": "Sat, 25 Jun 2022 21:03:58 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Aug 2022 18:37:21 GMT",
"version": "v2"
}
] | 2022-10-05 | [
[
"Frolov",
"Valeri P.",
""
],
[
"Koek",
"Alex",
""
]
] | In this paper, we discuss the gravitational field of ultrarelativistic extended spinning objects. For this purpose, we use a solution of the linearized gravitational equations obtained in the frame where such an object is translationally at rest, and boost this solution close to the speed of light. In order to obtain a... |
2112.03019 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Navigating stellar wobbles for imaging with the solar gravitational lens | 28 pages, 16 figures | Phys. Rev. D 105, 044012 (2022) | 10.1103/PhysRevD.105.044012 | null | gr-qc astro-ph.EP astro-ph.GA astro-ph.IM astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The solar gravitational lens (SGL) offers unique capabilities for
high-resolution imaging of faint, distant objects, such as exoplanets. In the
near future, a spacecraft carrying a meter-class telescope with a solar
coronagraph would be placed in the focal region of the SGL. That region begins
at ~547 astronomical un... | [
{
"created": "Mon, 6 Dec 2021 13:21:57 GMT",
"version": "v1"
}
] | 2022-02-09 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | The solar gravitational lens (SGL) offers unique capabilities for high-resolution imaging of faint, distant objects, such as exoplanets. In the near future, a spacecraft carrying a meter-class telescope with a solar coronagraph would be placed in the focal region of the SGL. That region begins at ~547 astronomical unit... |
2111.10077 | Omar Mustafa | Omar Mustafa | Confined Klein-Gordon oscillators in Minkowski spacetime and a
pseudo-Minkowski spacetime with a space-like dislocation: PDM KG-oscillators,
isospectrality and invariance | 17 pages, 3 Figures | Ann. Phys. 446 (2022) 169124 | 10.1016/j.aop.2022.169124 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | We revisit the a confined (in a Cornell-type Lorentz scalar potential)
KG-oscillator in Minkowski spacetime with space-like dislocation background. We
show that the effect of space-like dislocation is to shift the energy levels
along the dislocation parameter axis, and consequently energy levels crossings
are unavoid... | [
{
"created": "Fri, 19 Nov 2021 07:40:32 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2022 09:39:25 GMT",
"version": "v2"
},
{
"created": "Thu, 31 Mar 2022 07:54:06 GMT",
"version": "v3"
},
{
"created": "Fri, 5 Aug 2022 11:48:58 GMT",
"version": "v4"
},
{
"cr... | 2023-04-17 | [
[
"Mustafa",
"Omar",
""
]
] | We revisit the a confined (in a Cornell-type Lorentz scalar potential) KG-oscillator in Minkowski spacetime with space-like dislocation background. We show that the effect of space-like dislocation is to shift the energy levels along the dislocation parameter axis, and consequently energy levels crossings are unavoidab... |
2204.09006 | Hemwati Nandan | Shobhit Giri, Hemwati Nandan, Lokesh Kumar Joshi, Sunil D. Maharaj | Geodesic stability and quasinormal modes of non-commutative
Schwarzschild black hole employing Lyapunov exponent | null | Eur. Phys. J. Plus 137:181 (2022) | 10.1140/epjp/s13360-022-02403-5 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the dynamics of test particle and stability of circular geodesics in
the gravitational field of a non-commutative geometry inspired Schwarzschild
black hole spacetime (NCSBH). The coordinate time Lyapunov exponent
($\lambda_{c}$) is crucial to investigate the stability of equatorial circular
geodesics of mas... | [
{
"created": "Tue, 19 Apr 2022 17:03:50 GMT",
"version": "v1"
}
] | 2022-04-20 | [
[
"Giri",
"Shobhit",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Joshi",
"Lokesh Kumar",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We study the dynamics of test particle and stability of circular geodesics in the gravitational field of a non-commutative geometry inspired Schwarzschild black hole spacetime (NCSBH). The coordinate time Lyapunov exponent ($\lambda_{c}$) is crucial to investigate the stability of equatorial circular geodesics of massi... |
gr-qc/9210019 | Wai Suen | Ian H. Redmount and Wai-Mo Suen | Path integration in relativistic quantum mechanics | 14 pages | Int. J. Mod. Phys. A8 (1993) 1629-1636 | 10.1142/S0217751X93000667 | null | gr-qc | null | The simple physics of a free particle reveals important features of the
path-integral formulation of relativistic quantum theories. The exact
quantum-mechanical propagator is calculated here for a particle described by
the simple relativistic action proportional to its proper time. This propagator
is nonvanishing out... | [
{
"created": "Wed, 28 Oct 1992 23:15:19 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Redmount",
"Ian H.",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | The simple physics of a free particle reveals important features of the path-integral formulation of relativistic quantum theories. The exact quantum-mechanical propagator is calculated here for a particle described by the simple relativistic action proportional to its proper time. This propagator is nonvanishing outsi... |
1510.00790 | Ali Tofighi | A. Tofighi, M. Moazzen, and A. Farokhtabar | Vacuum Expectation Value Profiles of the Bulk Scalar Field in the
Generalized Randall-Sundrum Model | arXiv admin note: text overlap with arXiv:0809.4102, arXiv:1102.1970
by other authors | Adv. High. Ener. Phys. Vol 2015, 590980 (2015) | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In the generalized Randall-Sundrum warped brane-world model the cosmological
constant induced on the visible brane can be positive or negative. In this
paper we investigate profiles of vacuum expectation value of the bulk scalar
field under general Dirichlet andNeumann boundary conditions in the generalized
warped br... | [
{
"created": "Sat, 3 Oct 2015 07:52:56 GMT",
"version": "v1"
}
] | 2015-10-06 | [
[
"Tofighi",
"A.",
""
],
[
"Moazzen",
"M.",
""
],
[
"Farokhtabar",
"A.",
""
]
] | In the generalized Randall-Sundrum warped brane-world model the cosmological constant induced on the visible brane can be positive or negative. In this paper we investigate profiles of vacuum expectation value of the bulk scalar field under general Dirichlet andNeumann boundary conditions in the generalized warped bran... |
gr-qc/0001045 | Young-Jai Park | Yong-Wan Kim, Young-Jai Park, and Kwang-Sup Soh | Reissner-Nordstr\"om-AdS black hole in the GEMS approach | 15 pages, 1 figure, latex, to appear in Phys. Rev. D | Phys.Rev.D62:104020,2000 | 10.1103/PhysRevD.62.104020 | SOGANG-HEP 264/99, SNUTP 99-057 | gr-qc | null | We obtain a (5+2)-dimensional global flat embedding of the (3+1)-dimensional
curved RN-AdS space. Our results include the various limiting cases of global
embedding Minkowski space (GEMS) geometries of the RN, Schwarzschild-AdS in
(5+2)-dimensions, Schwarzschild in (5+1)-dimensions, purely charged space, and
universa... | [
{
"created": "Sun, 16 Jan 2000 05:20:13 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Aug 2000 08:34:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
],
[
"Soh",
"Kwang-Sup",
""
]
] | We obtain a (5+2)-dimensional global flat embedding of the (3+1)-dimensional curved RN-AdS space. Our results include the various limiting cases of global embedding Minkowski space (GEMS) geometries of the RN, Schwarzschild-AdS in (5+2)-dimensions, Schwarzschild in (5+1)-dimensions, purely charged space, and universal ... |
1412.3858 | Davide Batic | D. Batic, S. Nelson, M. Nowakowski | Light on curved backgrounds | 34 pages, 10 figures | null | 10.1103/PhysRevD.91.104015 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the motion of light on different spacetime manifolds by
calculating the deflection angle, lensing properties and by probing into the
possibility of bound states. The metrics in which we examine the light motion
include, among other, a general relativistic Dark Matter metric, a dirty Black
Hole and a Worm ... | [
{
"created": "Thu, 11 Dec 2014 23:06:14 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Batic",
"D.",
""
],
[
"Nelson",
"S.",
""
],
[
"Nowakowski",
"M.",
""
]
] | We consider the motion of light on different spacetime manifolds by calculating the deflection angle, lensing properties and by probing into the possibility of bound states. The metrics in which we examine the light motion include, among other, a general relativistic Dark Matter metric, a dirty Black Hole and a Worm Ho... |
gr-qc/0001076 | Boris Grobov | A.K.Guts, A.A.Zvyagintsev | Interpretation of intuitionistic solution of the vacuum Einstein
equations in smooth topos | 9 pages, LaTeX2e | null | null | null | gr-qc | null | The topos theory is a theory which is used for deciding a number of problems
of theory of relativity, gravitation and quantum physics. In the article
spherically symmetric solution of the vacuum Einstein equations in the
Intuitionistic theory of Gravitation at different stages of smooth topos ${\bf
Set}^{\bf L_{op}}$... | [
{
"created": "Mon, 24 Jan 2000 18:16:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Guts",
"A. K.",
""
],
[
"Zvyagintsev",
"A. A.",
""
]
] | The topos theory is a theory which is used for deciding a number of problems of theory of relativity, gravitation and quantum physics. In the article spherically symmetric solution of the vacuum Einstein equations in the Intuitionistic theory of Gravitation at different stages of smooth topos ${\bf Set}^{\bf L_{op}}$ i... |
gr-qc/9912120 | Carey Carpenter Briggs | C. C. Briggs | A Possible Theoretical Basis for Propulsive Force Generation by Both
Conventional and Unconventional Means | 10 pages | null | null | null | gr-qc | null | A possible theoretical basis is given for propulsive force generation by both
conventional and unconventional means.
| [
{
"created": "Fri, 31 Dec 1999 21:52:48 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Apr 2000 02:13:44 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Briggs",
"C. C.",
""
]
] | A possible theoretical basis is given for propulsive force generation by both conventional and unconventional means. |
2208.14117 | Avneet Singh | Avneet Singh and Maria Alessandra Papa | Opportunistic search for continuous gravitational waves from compact
objects in long-period binaries | 4 pages, 4 figures, v1: initial submit, v2: correction in figure 4,
v3: submitted to ApJ, v4: final accepted version, v5: published version (ApJ) | The Astrophysical Journal (ApJ), Volume 943, Number 2, 2023 | 10.3847/1538-4357/acaf80 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most all-sky searches for continuous gravitational waves assume the source to
be isolated. In this paper, we allow for an unknown companion object in a
long-period orbit and opportunistically use previous results from an all-sky
search for isolated sources to constrain the continuous gravitational wave
amplitude over... | [
{
"created": "Tue, 30 Aug 2022 10:05:14 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Sep 2022 07:00:13 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Nov 2022 09:20:44 GMT",
"version": "v3"
},
{
"created": "Fri, 6 Jan 2023 22:18:55 GMT",
"version": "v4"
},
{
"crea... | 2023-03-24 | [
[
"Singh",
"Avneet",
""
],
[
"Papa",
"Maria Alessandra",
""
]
] | Most all-sky searches for continuous gravitational waves assume the source to be isolated. In this paper, we allow for an unknown companion object in a long-period orbit and opportunistically use previous results from an all-sky search for isolated sources to constrain the continuous gravitational wave amplitude over a... |
gr-qc/0212053 | Kenneth Nordtvedt | Kenneth Nordtvedt (Northwest Analysis) | The special relativistic equivalence principle: gravity theory's
foundation | 22 pages, 5 figures, PCTex32 v3.4 | null | null | null | gr-qc | null | On incorporating special relativity theory into an extended equivalence
principle, post-Newtonian gravitational phenomena beyond that originally
predicted by Einstein are predicted (required), such as geodetic and
gravitomagnetic precessions of local inertial frames, and precession of
Mercury's orbital perihelion. Wh... | [
{
"created": "Wed, 11 Dec 2002 22:18:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nordtvedt",
"Kenneth",
"",
"Northwest Analysis"
]
] | On incorporating special relativity theory into an extended equivalence principle, post-Newtonian gravitational phenomena beyond that originally predicted by Einstein are predicted (required), such as geodetic and gravitomagnetic precessions of local inertial frames, and precession of Mercury's orbital perihelion. Why ... |
gr-qc/0105063 | Samir Mathur | Sumit R. Das and Samir D. Mathur | The Quantum Physics of Black Holes: Results from String Theory | 49 pages, Latex, 4 figures, (Review article) | Ann.Rev.Nucl.Part.Sci. 50 (2000) 153-206 | 10.1146/annurev.nucl.50.1.153 | OHSTPY-HEP-T-01-015 | gr-qc hep-th | null | We review recent progress in our understanding of the physics of black holes.
In particular, we discuss the ideas from string theory that explain the entropy
of black holes from a counting of microstates of the hole, and the related
derivation of unitary Hawking radiation from such holes.
| [
{
"created": "Thu, 17 May 2001 22:07:47 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Das",
"Sumit R.",
""
],
[
"Mathur",
"Samir D.",
""
]
] | We review recent progress in our understanding of the physics of black holes. In particular, we discuss the ideas from string theory that explain the entropy of black holes from a counting of microstates of the hole, and the related derivation of unitary Hawking radiation from such holes. |
gr-qc/9609059 | Karen Camarda | P. Anninos, K. Camarda, J. Libson, J. Mass\'o, E. Seidel, W.-M. Suen | Finding Apparent Horizons in Dynamic 3D Numerical Spacetimes | 19 pages, 13 figures, LaTex, to appear in Phys. Rev. D. Minor changes
made | Phys.Rev. D58 (1998) 024003 | 10.1103/PhysRevD.58.024003 | AEI-018 | gr-qc | null | We have developed a general method for finding apparent horizons in 3D
numerical relativity. Instead of solving for the partial differential equation
describing the location of the apparent horizons, we expand the closed 2D
surfaces in terms of symmetric trace--free tensors and solve for the expansion
coefficients us... | [
{
"created": "Wed, 25 Sep 1996 13:16:14 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Apr 1997 19:19:15 GMT",
"version": "v2"
},
{
"created": "Wed, 20 May 1998 14:53:29 GMT",
"version": "v3"
}
] | 2016-08-15 | [
[
"Anninos",
"P.",
""
],
[
"Camarda",
"K.",
""
],
[
"Libson",
"J.",
""
],
[
"Massó",
"J.",
""
],
[
"Seidel",
"E.",
""
],
[
"Suen",
"W. -M.",
""
]
] | We have developed a general method for finding apparent horizons in 3D numerical relativity. Instead of solving for the partial differential equation describing the location of the apparent horizons, we expand the closed 2D surfaces in terms of symmetric trace--free tensors and solve for the expansion coefficients usin... |
gr-qc/0206008 | Badri Krishnan | Olaf Dreyer, Badri Krishnan, Eric Schnetter, Deirdre Shoemaker | Introduction to Isolated Horizons in Numerical Relativity | 14 pages, revtex4, 7 figures. Final PRD version | Phys.Rev.D67:024018,2003 | 10.1103/PhysRevD.67.024018 | null | gr-qc | null | We present a coordinate-independent method for extracting mass (M) and
angular momentum (J) of a black hole in numerical simulations. This method,
based on the isolated horizon framework, is applicable both at late times when
the black hole has reached equilibrium, and at early times when the black holes
are widely s... | [
{
"created": "Mon, 3 Jun 2002 16:57:37 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jan 2004 16:51:37 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Dreyer",
"Olaf",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Schnetter",
"Eric",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | We present a coordinate-independent method for extracting mass (M) and angular momentum (J) of a black hole in numerical simulations. This method, based on the isolated horizon framework, is applicable both at late times when the black hole has reached equilibrium, and at early times when the black holes are widely sep... |
1608.06246 | Saeed Rastgoo | Alejandro Corichi, Javier Olmedo, Saeed Rastgoo | Callan-Giddings-Harvey-Strominger vacuum in loop quantum gravity and
singularity resolution | 24 pages, 1 figure; v2: matches the PRD published version, titled
modified according to the published version, a few typos corrected and a
short comment regarding refined algebraic quantization added | Phys. Rev. D 94, 084050 (2016) | 10.1103/PhysRevD.94.084050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study here a complete quantization of a Callan-Giddings-Harvey-Strominger
(CGHS) vacuum model following loop quantum gravity techniques. Concretely, we
adopt a formulation of the model in terms of a set of new variables that
resemble the ones commonly employed in spherically symmetric loop quantum
gravity. The cla... | [
{
"created": "Mon, 22 Aug 2016 18:07:06 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Oct 2016 00:04:14 GMT",
"version": "v2"
}
] | 2016-11-02 | [
[
"Corichi",
"Alejandro",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | We study here a complete quantization of a Callan-Giddings-Harvey-Strominger (CGHS) vacuum model following loop quantum gravity techniques. Concretely, we adopt a formulation of the model in terms of a set of new variables that resemble the ones commonly employed in spherically symmetric loop quantum gravity. The class... |
1111.0026 | Reinoud Slagter | Reinoud Jan Slagter, Derk Masselink | Warped Angle-deficit of a 5 Dimensional Cosmic String | 6 pages, 6 figures; plus-minus sign added in solution Eq.40;
correction of numbering of equations | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | We present a cosmic string on a warped five dimensional space time in
Einstein-Yang-Mills theory. Four-dimensional cosmic strings show some serious
problems concerning the mechanism of string smoothing related to the string
mass per unit length, $G\mu \approx 10^{-6}$. A warped cosmic string could
overcome this probl... | [
{
"created": "Mon, 31 Oct 2011 20:44:00 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Nov 2011 22:40:24 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Nov 2011 16:50:14 GMT",
"version": "v3"
}
] | 2011-11-14 | [
[
"Slagter",
"Reinoud Jan",
""
],
[
"Masselink",
"Derk",
""
]
] | We present a cosmic string on a warped five dimensional space time in Einstein-Yang-Mills theory. Four-dimensional cosmic strings show some serious problems concerning the mechanism of string smoothing related to the string mass per unit length, $G\mu \approx 10^{-6}$. A warped cosmic string could overcome this problem... |
2302.07799 | Jose Socorro Garcia | J. Socorro and J. Juan Rosales | Quantum fractionary cosmology: K-essence theory | 26 pages, 21 figures, We have add references and substantial changes,
version published in Universe Journal | Universe 2023, 9, 185 | 10.3390/universe9040185 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Using a particular form of the quantum K-essence scalar field, we show that
in the quantum formalism, a fractional differential equation in the scalar
field variable, for some epochs in the Friedmann-Lema\^itre-Robertson-Walker
(FLRW) model (radiation and inflation-like epochs, for example), appears
naturally. In the... | [
{
"created": "Wed, 15 Feb 2023 17:32:46 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 14:33:03 GMT",
"version": "v2"
}
] | 2023-04-14 | [
[
"Socorro",
"J.",
""
],
[
"Rosales",
"J. Juan",
""
]
] | Using a particular form of the quantum K-essence scalar field, we show that in the quantum formalism, a fractional differential equation in the scalar field variable, for some epochs in the Friedmann-Lema\^itre-Robertson-Walker (FLRW) model (radiation and inflation-like epochs, for example), appears naturally. In the c... |
2311.15944 | Antonio Tedesco | Antonio Tedesco, Antonio Capolupo, Gaetano Lambiase | Relativistic periastron advance beyond Einstein theory: analytical
solution with applications | 22 pages, 10 figures, 5 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a new solution to calculate the orbital periastron advance of a test
body subject to a central gravitational force field, for relativistic theories
and models beyond Einstein. This analitycal formula has general validity that
includes all the post-Newtonian (PN) contributions to the dynamics and is
useful for... | [
{
"created": "Mon, 27 Nov 2023 15:51:03 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2023 13:47:39 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Mar 2024 22:08:55 GMT",
"version": "v3"
},
{
"created": "Sat, 15 Jun 2024 11:41:41 GMT",
"version": "v4"
}
] | 2024-06-18 | [
[
"Tedesco",
"Antonio",
""
],
[
"Capolupo",
"Antonio",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | We find a new solution to calculate the orbital periastron advance of a test body subject to a central gravitational force field, for relativistic theories and models beyond Einstein. This analitycal formula has general validity that includes all the post-Newtonian (PN) contributions to the dynamics and is useful for h... |
2112.05608 | Maciej Kolanowski | Abhay Ashtekar, Neev Khera, Maciej Kolanowski and Jerzy Lewandowski | Charges and Fluxes on (Perturbed) Non-expanding Horizons | 36 pages, 1 figure. Two clarifications and a reference added. Version
to appear in JHEP | null | 10.1007/JHEP02(2022)066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a companion paper we showed that the symmetry group $\mathfrak{G}$ of
non-expanding horizons (NEHs) is a 1-dimensional extension of the
Bondi-Metzner-Sachs group $\mathfrak{G}$ at $\mathcal{I}^{+}$. For each
infinitesimal generator of $\mathfrak{G}$, we now define a charge and a flux on
NEHs as well as perturbed N... | [
{
"created": "Fri, 10 Dec 2021 15:40:51 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2022 23:08:53 GMT",
"version": "v2"
}
] | 2022-03-02 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Khera",
"Neev",
""
],
[
"Kolanowski",
"Maciej",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | In a companion paper we showed that the symmetry group $\mathfrak{G}$ of non-expanding horizons (NEHs) is a 1-dimensional extension of the Bondi-Metzner-Sachs group $\mathfrak{G}$ at $\mathcal{I}^{+}$. For each infinitesimal generator of $\mathfrak{G}$, we now define a charge and a flux on NEHs as well as perturbed NEH... |
gr-qc/0209017 | Jorge Pullin | Gioel Calabrese, Jorge Pullin, Oscar Reula, Olivier Sarbach, Manuel
Tiglio | Well posed constraint-preserving boundary conditions for the linearized
Einstein equations | 15 pages, RevTeX, no figures | Commun.Math.Phys.240:377-395,2003 | 10.1007/s00220-003-0889-2 | LSU-REL-090502 | gr-qc | null | In the Cauchy problem of general relativity one considers initial data that
satisfies certain constraints. The evolution equations guarantee that the
evolved variables will satisfy the constraints at later instants of time. This
is only true within the domain of dependence of the initial data. If one wishes
to consid... | [
{
"created": "Thu, 5 Sep 2002 20:55:39 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Calabrese",
"Gioel",
""
],
[
"Pullin",
"Jorge",
""
],
[
"Reula",
"Oscar",
""
],
[
"Sarbach",
"Olivier",
""
],
[
"Tiglio",
"Manuel",
""
]
] | In the Cauchy problem of general relativity one considers initial data that satisfies certain constraints. The evolution equations guarantee that the evolved variables will satisfy the constraints at later instants of time. This is only true within the domain of dependence of the initial data. If one wishes to consider... |
gr-qc/0506013 | Marc Mars | Lars Andersson, Marc Mars, Walter Simon | Local existence of dynamical and trapping horizons | 4 pages, 1 figure, minor changes | Phys.Rev.Lett. 95 (2005) 111102 | 10.1103/PhysRevLett.95.111102 | null | gr-qc | null | Given a spacelike foliation of a spacetime and a marginally outer trapped
surface S on some initial leaf, we prove that under a suitable stability
condition S is contained in a ``horizon'', i.e. a smooth 3-surface foliated by
marginally outer trapped slices which lie in the leaves of the given foliation.
We also show... | [
{
"created": "Thu, 2 Jun 2005 15:07:54 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2005 16:57:19 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Andersson",
"Lars",
""
],
[
"Mars",
"Marc",
""
],
[
"Simon",
"Walter",
""
]
] | Given a spacelike foliation of a spacetime and a marginally outer trapped surface S on some initial leaf, we prove that under a suitable stability condition S is contained in a ``horizon'', i.e. a smooth 3-surface foliated by marginally outer trapped slices which lie in the leaves of the given foliation. We also show t... |
1803.11422 | Rajibul Shaikh | Rajibul Shaikh (TIFR Mumbai, India) | Shadows of rotating wormholes | 22 pages, 6 figures, revised version, published in Phys. Rev. D | Phys. Rev. D 98, 024044 (2018) | 10.1103/PhysRevD.98.024044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study shadows cast by a certain class of rotating wormholes and point out
the crucial role of a rotating wormhole throat in the formation of a shadow.
Overlooking this crucial role of a wormhole throat has resulted incomplete
results in the previous studies on shadows of the same class of rotating
wormholes. We ex... | [
{
"created": "Fri, 30 Mar 2018 11:33:01 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jul 2018 15:31:25 GMT",
"version": "v2"
}
] | 2018-07-31 | [
[
"Shaikh",
"Rajibul",
"",
"TIFR Mumbai, India"
]
] | We study shadows cast by a certain class of rotating wormholes and point out the crucial role of a rotating wormhole throat in the formation of a shadow. Overlooking this crucial role of a wormhole throat has resulted incomplete results in the previous studies on shadows of the same class of rotating wormholes. We expl... |
2010.02102 | Ujjal Debnath | Ujjal Debnath | Thermodynamics of FRW Universe: Heat Engine | 6 pages, no figures | Published in Physics Letters B 810, 135807 (2020) | 10.1016/j.physletb.2020.135807 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We assume the non-flat Friedmann-Robertson-Walker (FRW) Universe as a
thermodynamical system. We assume the cosmological horizon as a inner trapping
horizon which is treated as dynamical apparent horizon of FRW Universe. We
write the dynamical apparent horizon radius and temperature on the apparent
horizon. We assume... | [
{
"created": "Fri, 2 Oct 2020 17:08:12 GMT",
"version": "v1"
}
] | 2020-10-06 | [
[
"Debnath",
"Ujjal",
""
]
] | We assume the non-flat Friedmann-Robertson-Walker (FRW) Universe as a thermodynamical system. We assume the cosmological horizon as a inner trapping horizon which is treated as dynamical apparent horizon of FRW Universe. We write the dynamical apparent horizon radius and temperature on the apparent horizon. We assume t... |
1609.00879 | Abhishek Majhi | Abhishek Majhi | Conformal blocks on a 2-sphere with indistinguishable punctures and
implications on black hole entropy | 5 pages, published version | Physics Letters B 762 (2016) 243-246 | 10.1016/j.physletb.2016.09.037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dimensionality of the Hilbert space of a Chern-Simons theory on a 3-fold,
in the presence of Wilson lines carrying spin representations, had been counted
by using its link with the Wess-Zumino theory, with level $k$, on the 2-sphere
with points (to be called punctures) marked by the piercing of the
corresponding ... | [
{
"created": "Sun, 4 Sep 2016 00:18:39 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Oct 2016 02:01:11 GMT",
"version": "v2"
}
] | 2016-10-07 | [
[
"Majhi",
"Abhishek",
""
]
] | The dimensionality of the Hilbert space of a Chern-Simons theory on a 3-fold, in the presence of Wilson lines carrying spin representations, had been counted by using its link with the Wess-Zumino theory, with level $k$, on the 2-sphere with points (to be called punctures) marked by the piercing of the corresponding Wi... |
1407.1457 | M. B. Paranjape | Saoussen Mbarek, M. B. Paranjape | Negative mass bubbles in de Sitter space-time | 4 pages, 5 figures | Phys. Rev. D 90, 101502(R), 2014 | 10.1103/PhysRevD.90.101502 | UdeM-GPP-TH-14-235 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possibility of the existence of negative mass bubbles within a
de Sitter space-time background with matter content corresponding to a perfect
fluid. It is shown that there exist configurations of the perfect fluid, that
everywhere satisfy the dominant energy condition, the Einstein equations and
the equa... | [
{
"created": "Sun, 6 Jul 2014 05:17:15 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2014 03:17:15 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Mbarek",
"Saoussen",
""
],
[
"Paranjape",
"M. B.",
""
]
] | We study the possibility of the existence of negative mass bubbles within a de Sitter space-time background with matter content corresponding to a perfect fluid. It is shown that there exist configurations of the perfect fluid, that everywhere satisfy the dominant energy condition, the Einstein equations and the equati... |
gr-qc/0703111 | Ying Shao | Ying Shao, Yuanxing Gui | Statefinder Parameters for Tachyon Dark Energy Model | 5 pages, 5 figures, accepted by MPLA | Mod.Phys.Lett.A23:65-71,2008 | 10.1142/S0217732308023499 | null | gr-qc | null | In this paper we study the statefinder parameters for the tachyon dark energy
model. There are two kinds of stable attractor solutions in this model. The
statefinder diagrams characterize the properties of the tachyon dark energy
model. Our results show that the evolving trajectories of the attractor
solutions lie in... | [
{
"created": "Thu, 22 Mar 2007 05:07:12 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Shao",
"Ying",
""
],
[
"Gui",
"Yuanxing",
""
]
] | In this paper we study the statefinder parameters for the tachyon dark energy model. There are two kinds of stable attractor solutions in this model. The statefinder diagrams characterize the properties of the tachyon dark energy model. Our results show that the evolving trajectories of the attractor solutions lie in t... |
gr-qc/9706025 | Patricio Anibal Letelier | P.S. Letelier and W. M. Vieira | Chaos in black holes surrounded by gravitational waves | 15 pages, LaTex. | Class.Quant.Grav. 14 (1997) 1249-1257 | 10.1088/0264-9381/14/5/026 | null | gr-qc chao-dyn nlin.CD | null | The occurrence of chaos for test particles moving around Schwarzschild black
holes perturbed by a special class of gravitational waves is studied in the
context of the Melnikov method. The explicit integration of the equations of
motion for the homoclinic orbit is used to reduce the application of this
method to the ... | [
{
"created": "Tue, 10 Jun 1997 14:22:18 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Letelier",
"P. S.",
""
],
[
"Vieira",
"W. M.",
""
]
] | The occurrence of chaos for test particles moving around Schwarzschild black holes perturbed by a special class of gravitational waves is studied in the context of the Melnikov method. The explicit integration of the equations of motion for the homoclinic orbit is used to reduce the application of this method to the st... |
1004.3661 | Patrik Sandin | Sigbjorn Hervik, Woei Chet Lim, Patrik Sandin, Claes Uggla | Future asymptotics of tilted Bianchi type II cosmologies | 15 pages | Class. Quantum Grav. 27 185006 (2010) | 10.1088/0264-9381/27/18/185006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the future asymptotics of spatially homogeneous
Bianchi type II cosmologies with a tilted perfect fluid with a linear equation
of state. By means of Hamiltonian methods we first find a monotone function for
a special tilted case, which subsequently allows us to construct a new set of
monotone f... | [
{
"created": "Wed, 21 Apr 2010 09:29:40 GMT",
"version": "v1"
}
] | 2011-12-08 | [
[
"Hervik",
"Sigbjorn",
""
],
[
"Lim",
"Woei Chet",
""
],
[
"Sandin",
"Patrik",
""
],
[
"Uggla",
"Claes",
""
]
] | In this paper we study the future asymptotics of spatially homogeneous Bianchi type II cosmologies with a tilted perfect fluid with a linear equation of state. By means of Hamiltonian methods we first find a monotone function for a special tilted case, which subsequently allows us to construct a new set of monotone fun... |
gr-qc/0103003 | A. Miyazaki | A. Miyazaki | Varying Cosmological Constant and the Machian Solution in the
Generalized Scalar-Tensor Theory | 10 pages, LaTeX2e | null | null | null | gr-qc | null | The cosmological constant $(1/2)\lambda_{1}\phi_{, \mu}\phi ^{, \mu}/\phi
^{2}$ is introduced to the generalized scalar-tensor theory of gravitation with
the coupling function $\omega (\phi)=\eta /(\xi -2)$ and the Machian
cosmological solution satisfying $\phi =O(\rho /\omega)$ is discussed for the
homogeneous and i... | [
{
"created": "Thu, 1 Mar 2001 15:08:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Miyazaki",
"A.",
""
]
] | The cosmological constant $(1/2)\lambda_{1}\phi_{, \mu}\phi ^{, \mu}/\phi ^{2}$ is introduced to the generalized scalar-tensor theory of gravitation with the coupling function $\omega (\phi)=\eta /(\xi -2)$ and the Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ is discussed for the homogeneous and iso... |
2009.00160 | Kiyoshi Shiraishi | Nahomi Kan and Kiyoshi Shiraishi | Calculations in induced gravity from higher-derivative field theories | 19 pages, no figure | Int. J. Mod. Phys. A37 (2022) 06, 2250028 | 10.1142/S0217751X22500282 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate Einstein's gravity induced from
higher-derivative scalar field theories. We develop an approach utilizing an
effective theory of multiple fields for the higher-derivative theory. The
expressions for induced cosmological constant and the induced gravitational
constant are obtained in the ... | [
{
"created": "Tue, 1 Sep 2020 00:57:10 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2020 08:37:52 GMT",
"version": "v2"
},
{
"created": "Sat, 5 Dec 2020 05:48:01 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Feb 2021 07:47:04 GMT",
"version": "v4"
},
{
"crea... | 2022-03-29 | [
[
"Kan",
"Nahomi",
""
],
[
"Shiraishi",
"Kiyoshi",
""
]
] | In this paper, we investigate Einstein's gravity induced from higher-derivative scalar field theories. We develop an approach utilizing an effective theory of multiple fields for the higher-derivative theory. The expressions for induced cosmological constant and the induced gravitational constant are obtained in the pr... |
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