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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1909.03832 | Muhammad Asad Saeed Asad | Muhammad Asad Saeed, Ifra Noureen | Effect of Electromagnetism upon the Collapse of Cylindrical Symmetric
Stars in f(R; T) Gravity | 15 Pages, we want to make some fundamental changes in this work and
re-submit it soon | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By the end of the evaluation of this research artifact, readers would be able
to describe the effect of conducted plasma on evolution of stellar objects. In
this script, we have analyzed the stability of charged cylindrically symmetric
stellar objects in the context of f(R; T) theory of gravity. We have fabricated
fi... | [
{
"created": "Fri, 6 Sep 2019 14:06:34 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Oct 2019 11:56:34 GMT",
"version": "v2"
}
] | 2019-10-28 | [
[
"Saeed",
"Muhammad Asad",
""
],
[
"Noureen",
"Ifra",
""
]
] | By the end of the evaluation of this research artifact, readers would be able to describe the effect of conducted plasma on evolution of stellar objects. In this script, we have analyzed the stability of charged cylindrically symmetric stellar objects in the context of f(R; T) theory of gravity. We have fabricated fiel... |
1711.06321 | Mohd Shahalam | Abhineet Agarwal, R. Myrzakulov, S. K. J. Pacif, M. Shahalam | Cosmic acceleration from coupling of baryonic and dark matter
components: Analysis and diagnostics | 15 pages, 5 figures | International Journal of Modern Physics D, 28 (2019) 1950083 | 10.1142/S0218271819500834 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine a scenario in which late-time cosmic acceleration
might arise due to the coupling between baryonic matter and dark matter without
the presence of extra degrees of freedom. In this case, one can obtain
late-time acceleration in Jordan frame and not in Einstein frame. We consider
two different... | [
{
"created": "Mon, 13 Nov 2017 09:37:45 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Apr 2019 05:17:34 GMT",
"version": "v2"
}
] | 2022-07-20 | [
[
"Agarwal",
"Abhineet",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Pacif",
"S. K. J.",
""
],
[
"Shahalam",
"M.",
""
]
] | In this paper, we examine a scenario in which late-time cosmic acceleration might arise due to the coupling between baryonic matter and dark matter without the presence of extra degrees of freedom. In this case, one can obtain late-time acceleration in Jordan frame and not in Einstein frame. We consider two different f... |
1209.3565 | Sujoy Modak | Sujoy Kumar Modak | Thermodynamics of Black Holes: Semi-Classical Approaches and Beyond | Ph.D. thesis, 152 pages (including the front matter) ; Supervisor:
Rabin Banerjee ; Institution: S.N. Bose National Centre for Basic Sciences,
Kolkata, India ; Degree awarded on August 24, 2012 from University of
Calcutta, Kolkata, India | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis is focussed to study various aspects of black hole physics. Our
approach is a semi-classical type, where the spacetime geometry of black holes
is considered to be classical but the fields moving in the background are
quantum in nature. Some notable facets of this thesis are the following. We
start by look... | [
{
"created": "Mon, 17 Sep 2012 07:37:55 GMT",
"version": "v1"
}
] | 2012-09-18 | [
[
"Modak",
"Sujoy Kumar",
""
]
] | This thesis is focussed to study various aspects of black hole physics. Our approach is a semi-classical type, where the spacetime geometry of black holes is considered to be classical but the fields moving in the background are quantum in nature. Some notable facets of this thesis are the following. We start by lookin... |
2305.00401 | Dana Jones | Dana Jones, Ling Sun, Nils Siemonsen, William E. East, Susan M. Scott,
Karl Wette | Methods and prospects for gravitational wave searches targeting
ultralight vector boson clouds around known black holes | 21 pages, 12 figures | null | 10.1103/PhysRevD.108.064001 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultralight bosons are predicted in many extensions to the Standard Model and
are popular dark matter candidates. The black hole superradiance mechanism
allows for these particles to be probed using only their gravitational
interaction. In this scenario, an ultralight boson cloud may form spontaneously
around a spinni... | [
{
"created": "Sun, 30 Apr 2023 05:58:24 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Aug 2023 01:29:22 GMT",
"version": "v2"
}
] | 2023-10-26 | [
[
"Jones",
"Dana",
""
],
[
"Sun",
"Ling",
""
],
[
"Siemonsen",
"Nils",
""
],
[
"East",
"William E.",
""
],
[
"Scott",
"Susan M.",
""
],
[
"Wette",
"Karl",
""
]
] | Ultralight bosons are predicted in many extensions to the Standard Model and are popular dark matter candidates. The black hole superradiance mechanism allows for these particles to be probed using only their gravitational interaction. In this scenario, an ultralight boson cloud may form spontaneously around a spinning... |
2003.02257 | Tiberiu Harko | Tiberiu Harko, Haidar Sheikhahmadi | Irreversible thermodynamical description of warm inflationary
cosmological models | 33 pages, 22 figures, accepted for publication in Physics of the Dark
Universe | Physics of the Dark Universe 28, 100521 (2020) | 10.1016/j.dark.2020.100521 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the interaction between scalar fields and radiation in the
framework of warm inflationary models by using the irreversible thermodynamics
of open systems with matter creation/annihilation. We consider the scalar
fields and radiation as an interacting two component cosmological fluid in a
homogeneous, s... | [
{
"created": "Wed, 4 Mar 2020 18:54:45 GMT",
"version": "v1"
}
] | 2020-05-19 | [
[
"Harko",
"Tiberiu",
""
],
[
"Sheikhahmadi",
"Haidar",
""
]
] | We investigate the interaction between scalar fields and radiation in the framework of warm inflationary models by using the irreversible thermodynamics of open systems with matter creation/annihilation. We consider the scalar fields and radiation as an interacting two component cosmological fluid in a homogeneous, spa... |
1507.00922 | Christian Pfeifer | Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi, Niccol\'o
Loret, Christian Pfeifer | Hamilton geometry: Phase space geometry from modified dispersion
relations | 32 pages, section on quantisation of the theory added, comments on
additin of momenta on curved momentum spaces extended | Phys. Rev. D 92, 084053 (2015) | 10.1103/PhysRevD.92.084053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the Hamilton geometry of the phase space of particles whose
motion is characterised by general dispersion relations. In this framework
spacetime and momentum space are naturally curved and intertwined, allowing for
a simultaneous description of both spacetime curvature and non-trivial momentum
space geome... | [
{
"created": "Fri, 3 Jul 2015 14:35:23 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2015 11:02:42 GMT",
"version": "v2"
}
] | 2015-11-04 | [
[
"Barcaroli",
"Leonardo",
""
],
[
"Brunkhorst",
"Lukas K.",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Loret",
"Niccoló",
""
],
[
"Pfeifer",
"Christian",
""
]
] | We describe the Hamilton geometry of the phase space of particles whose motion is characterised by general dispersion relations. In this framework spacetime and momentum space are naturally curved and intertwined, allowing for a simultaneous description of both spacetime curvature and non-trivial momentum space geometr... |
1902.01895 | Pankaj Saha | Debaprasad Maity and Pankaj Saha | Minimal plateau inflationary cosmologies and constraints from reheating | 27 pages, 8 figures. Matches Published version. (This work supersedes
the work: arXiv:1610.00173 [astro-ph.CO]) | Class. Quantum Grav. 36 045010 (2019) | 10.1088/1361-6382/ab0038 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the growing consensus on simple power law inflation models not being
favored by the PLANCK observations, dynamics for the non-standard inflation
gain significant interest in the recent past. In this paper, we analyze in
detail a class of supergravity inspired phenomenological inflationary models
with non-polynom... | [
{
"created": "Tue, 5 Feb 2019 20:14:05 GMT",
"version": "v1"
}
] | 2019-03-08 | [
[
"Maity",
"Debaprasad",
""
],
[
"Saha",
"Pankaj",
""
]
] | With the growing consensus on simple power law inflation models not being favored by the PLANCK observations, dynamics for the non-standard inflation gain significant interest in the recent past. In this paper, we analyze in detail a class of supergravity inspired phenomenological inflationary models with non-polynomia... |
1403.0186 | Mohammad Reza Setare | M. R. Setare, V. Kamali | Warm-Intermediate Inflationary Universe Model with Viscous Pressure in
High Dissipative Regime | 17 pages, 4 figures, accepted for publication in General Relativity
and Gravitation. arXiv admin note: substantial text overlap with
arXiv:1312.2832, arXiv:1302.0493 | null | 10.1007/s10714-014-1698-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warm inflation model with bulk viscous pressure in the context of
"intermediate inflation" where the cosmological scale factor expands as
$a(t)=a_0\exp(At^f)$, is studied. The characteristics of this model in
slow-roll approximation and in high dissipative regime are presented in two
cases: 1- Dissipative parameter $... | [
{
"created": "Sun, 2 Mar 2014 10:33:33 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Setare",
"M. R.",
""
],
[
"Kamali",
"V.",
""
]
] | Warm inflation model with bulk viscous pressure in the context of "intermediate inflation" where the cosmological scale factor expands as $a(t)=a_0\exp(At^f)$, is studied. The characteristics of this model in slow-roll approximation and in high dissipative regime are presented in two cases: 1- Dissipative parameter $\G... |
2407.12087 | Suddhasattwa Brahma | Idrus Husin Belfaqih, Martin Bojowald, Suddhasattwa Brahma and Erick
I. Duque | Black holes in effective loop quantum gravity: Covariant holonomy
modifications | 84+2 pages, 7 figures (all at the end of the draft); comments welcome | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Emergent modified gravity provides a covariant, effective framework for
obtaining spherically symmetric black hole solutions in models of loop quantum
gravity with scale-dependent holonomy modifications. Exact solutions for vacuum
black holes in the presence of a cosmological constant are derived here and
analyzed in... | [
{
"created": "Tue, 16 Jul 2024 18:00:03 GMT",
"version": "v1"
}
] | 2024-07-18 | [
[
"Belfaqih",
"Idrus Husin",
""
],
[
"Bojowald",
"Martin",
""
],
[
"Brahma",
"Suddhasattwa",
""
],
[
"Duque",
"Erick I.",
""
]
] | Emergent modified gravity provides a covariant, effective framework for obtaining spherically symmetric black hole solutions in models of loop quantum gravity with scale-dependent holonomy modifications. Exact solutions for vacuum black holes in the presence of a cosmological constant are derived here and analyzed in f... |
gr-qc/0405044 | Patrick Brady | Patrick R. Brady, Jolien D. E. Creighton, and Alan G. Wiseman | Upper limits on gravitational-wave signals based on loudest events | 8 pages, 1 figure | Class.Quant.Grav. 21 (2004) S1775-S1782 | 10.1088/0264-9381/21/20/020 | null | gr-qc | null | Searches for gravitational-wave bursts have often focused on the loudest
event(s) in searching for detections and in determining upper limits on
astrophysical populations. Typical upper limits have been reported on event
rates and event amplitudes which can then be translated into constraints on
astrophysical populat... | [
{
"created": "Fri, 7 May 2004 20:19:53 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Brady",
"Patrick R.",
""
],
[
"Creighton",
"Jolien D. E.",
""
],
[
"Wiseman",
"Alan G.",
""
]
] | Searches for gravitational-wave bursts have often focused on the loudest event(s) in searching for detections and in determining upper limits on astrophysical populations. Typical upper limits have been reported on event rates and event amplitudes which can then be translated into constraints on astrophysical populatio... |
1511.02424 | Magd Elias Kahil | Magd E. Kahil | Stability of Stellar Systems Orbiting SgrA* | A talk presented at the Fifth Gammov International Conference on
Astronomy, Astrophysics , Cosmology and Astrobiology held in Odessa Ukraine,
August 16-23 | null | null | null | gr-qc astro-ph.GA astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Path equations of different orbiting objects in the presence of very strong
gravitational fields are essential to examine the impact of its gravitational
effect on the stability of each system. Implementing an analogous method, used
to examine the stability of planetary systems by solving the geodesic deviation
equat... | [
{
"created": "Sun, 8 Nov 2015 01:33:30 GMT",
"version": "v1"
}
] | 2015-11-11 | [
[
"Kahil",
"Magd E.",
""
]
] | Path equations of different orbiting objects in the presence of very strong gravitational fields are essential to examine the impact of its gravitational effect on the stability of each system. Implementing an analogous method, used to examine the stability of planetary systems by solving the geodesic deviation equatio... |
2306.02950 | Alesandro Santos | S. C. Ulhoa, A. F. Santos, E. P. Spaniol and Faqir C. Khanna | On Thermodynamics of Kerr Black Hole | 15 pages, 04 figures, accepted for publication in Annalen der Physik | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The gravitational Stefan-Boltzmann law is considered for the Kerr black hole
in the weak-field limit. The energy-momentum tensor predicted by
Teleparallelism Equivalent to General Relativity (TEGR) is used in the Thermo
Field Dynamics (TFD) formalism to thermalize the field. A temperature-dependent
gravitational pres... | [
{
"created": "Mon, 5 Jun 2023 15:15:38 GMT",
"version": "v1"
}
] | 2023-06-06 | [
[
"Ulhoa",
"S. C.",
""
],
[
"Santos",
"A. F.",
""
],
[
"Spaniol",
"E. P.",
""
],
[
"Khanna",
"Faqir C.",
""
]
] | The gravitational Stefan-Boltzmann law is considered for the Kerr black hole in the weak-field limit. The energy-momentum tensor predicted by Teleparallelism Equivalent to General Relativity (TEGR) is used in the Thermo Field Dynamics (TFD) formalism to thermalize the field. A temperature-dependent gravitational pressu... |
gr-qc/9706021 | Urjit A Yajnik | U. A. Yajnik and K. Narayan (Indian Institute of Technology, Bombay) | Canonical Quantization Inside the Schwarzschild Black Hole | 8 pages, LaTex. Title altered. One reference added. A few typos esp.
eq.(7),(38) corrected. To appear in Class.Q.Grav | Class.Quant.Grav. 15 (1998) 1315-1321 | 10.1088/0264-9381/15/5/013 | null | gr-qc hep-ph | null | We propose a scheme for quantizing a scalar field over the Schwarzschild
manifold including the interior of the horizon. On the exterior, the timelike
Killing vector and on the horizon the isometry corresponding to restricted
Lorentz boosts can be used to enforce the spectral condition. For the interior
we appeal to ... | [
{
"created": "Mon, 9 Jun 1997 10:18:53 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jan 1998 12:07:30 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Yajnik",
"U. A.",
"",
"Indian Institute of Technology, Bombay"
],
[
"Narayan",
"K.",
"",
"Indian Institute of Technology, Bombay"
]
] | We propose a scheme for quantizing a scalar field over the Schwarzschild manifold including the interior of the horizon. On the exterior, the timelike Killing vector and on the horizon the isometry corresponding to restricted Lorentz boosts can be used to enforce the spectral condition. For the interior we appeal to th... |
gr-qc/0504073 | Akinbo Ojo Dr | Akinbo Ojo | On a thermodynamic basis for inflationary cosmology | Arguments sharpened. Certain aspects elaborated in more detail and
some areas clarified in response to referees' comments. 35 pages, no figures | null | null | null | gr-qc | null | Modifying the standard hot big bang model of cosmology with an inflationary
event has been very successful in resolving most of the outstanding
cosmological problems. The various inflationary mechanisms proposed depend on
the production of expansion from exotic phenomena, false vacuum, scalar fields
or other exotic p... | [
{
"created": "Sat, 16 Apr 2005 16:51:30 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Aug 2005 19:33:17 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ojo",
"Akinbo",
""
]
] | Modifying the standard hot big bang model of cosmology with an inflationary event has been very successful in resolving most of the outstanding cosmological problems. The various inflationary mechanisms proposed depend on the production of expansion from exotic phenomena, false vacuum, scalar fields or other exotic par... |
1206.5121 | Farhad Darabi | K. Zeynali, F. Darabi, H. Motavalli | Black hole thermodynamics and modified GUP consistent with doubly
special relativity | 13 pages, 6 figures, minor revision, references added | Mod. Phys. Lett. A, Vol. 27, No. 39 (2012) 1250227 | 10.1142/S0217732312502276 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the black hole thermodynamics and obtain the correction terms for
temperature, entropy, and heat capacity of the Schwarzschild black hole,
resulting from the commutation relations in the framework of {\it Modified
Generalized Uncertainty Principle} suggested by {\it Doubly Special
Relativity}.
| [
{
"created": "Fri, 22 Jun 2012 11:57:14 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Dec 2012 06:19:19 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Zeynali",
"K.",
""
],
[
"Darabi",
"F.",
""
],
[
"Motavalli",
"H.",
""
]
] | We study the black hole thermodynamics and obtain the correction terms for temperature, entropy, and heat capacity of the Schwarzschild black hole, resulting from the commutation relations in the framework of {\it Modified Generalized Uncertainty Principle} suggested by {\it Doubly Special Relativity}. |
1708.03451 | Yun Soo Myung | Yun Soo Myung | Renormalizability and Newtonian potential in scale-invariant gravity | 9 pages, no figures, version to appear in IJMPD | null | 10.1142/S0218271818501055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a conjecture that renormalizable higher-derivative gravity has a
finite classical potential at the origin. In this work we show clearly that the
scale-invariant gravity (SIG) satisfies the conjecture. This gravity produces
the better-behaved $1/k^4$ UV behavior as needed for renormalizability. It
turns out t... | [
{
"created": "Fri, 11 Aug 2017 07:02:34 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2018 23:00:15 GMT",
"version": "v2"
}
] | 2018-09-12 | [
[
"Myung",
"Yun Soo",
""
]
] | There is a conjecture that renormalizable higher-derivative gravity has a finite classical potential at the origin. In this work we show clearly that the scale-invariant gravity (SIG) satisfies the conjecture. This gravity produces the better-behaved $1/k^4$ UV behavior as needed for renormalizability. It turns out tha... |
2010.04848 | Tousif Islam | Tousif Islam, Scott E. Field, Carl-Johan Haster and Rory Smith | Improved analysis of GW190412 with a precessing numerical relativity
surrogate waveform model | 15 pages, 4 figures; Matches the accepted version in PRD | Phys. Rev. D 103, 104027 (2021) | 10.1103/PhysRevD.103.104027 | LIGO Document Number DCC-P2000384 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent observation of GW190412, the first high-mass ratio binary
black-hole (BBH) merger, by the LIGO-Virgo Collaboration (LVC) provides a
unique opportunity to probe the impact of subdominant harmonics and precession
effects encoded in a gravitational wave signal. We present refined estimates of
source parameter... | [
{
"created": "Fri, 9 Oct 2020 23:38:30 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 2021 23:59:27 GMT",
"version": "v2"
}
] | 2021-05-19 | [
[
"Islam",
"Tousif",
""
],
[
"Field",
"Scott E.",
""
],
[
"Haster",
"Carl-Johan",
""
],
[
"Smith",
"Rory",
""
]
] | The recent observation of GW190412, the first high-mass ratio binary black-hole (BBH) merger, by the LIGO-Virgo Collaboration (LVC) provides a unique opportunity to probe the impact of subdominant harmonics and precession effects encoded in a gravitational wave signal. We present refined estimates of source parameters ... |
1509.07027 | Davood Momeni Dr | Antonio Pasqua, Surajit Chattopadhyay, Davood Momeni, Muhammad Raza,
Ratbay Myrzakulov, Mir Faizal | Cosmological reconstruction and {\it Om} diagnostic analysis of
Einstein-Aether Theory | 47 pages, 9 figures, 5 tables,Major Rvised version | JCAP04(2017)015 | 10.1088/1475-7516/2017/04/015 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will analyse the cosmological models in Einstein-aether
gravity, which is a modified theory of gravity in which a time-like vector
field breaks the Lorentz symmetry. We will use this formalism to analyse
different cosmological models with different behavior of the scale factor. In
this analysis, we ... | [
{
"created": "Wed, 23 Sep 2015 15:19:50 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2015 03:41:13 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Mar 2016 15:33:39 GMT",
"version": "v3"
},
{
"created": "Wed, 9 Nov 2016 14:37:06 GMT",
"version": "v4"
}
] | 2017-04-19 | [
[
"Pasqua",
"Antonio",
""
],
[
"Chattopadhyay",
"Surajit",
""
],
[
"Momeni",
"Davood",
""
],
[
"Raza",
"Muhammad",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Faizal",
"Mir",
""
]
] | In this paper, we will analyse the cosmological models in Einstein-aether gravity, which is a modified theory of gravity in which a time-like vector field breaks the Lorentz symmetry. We will use this formalism to analyse different cosmological models with different behavior of the scale factor. In this analysis, we wi... |
1812.11148 | David McNutt | S. Hervik and D. McNutt | Locally Homogeneous Kundt Triples and CSI Metrics | 17 pages | Classical and Quantum Gravity, 36, 185013 (2019) | 10.1088/1361-6382/ab3296 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A pseudo-Riemannian manifold is called CSI if all scalar polynomial
invariants constructed from the curvature tensor and its covariant derivatives
are constant. In the Lorentzian case, the CSI spacetimes have been studied
extensively due to their application to gravity theories. It is conjectured
that a CSI spacetime... | [
{
"created": "Fri, 28 Dec 2018 18:21:59 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Aug 2019 09:21:24 GMT",
"version": "v2"
}
] | 2019-08-29 | [
[
"Hervik",
"S.",
""
],
[
"McNutt",
"D.",
""
]
] | A pseudo-Riemannian manifold is called CSI if all scalar polynomial invariants constructed from the curvature tensor and its covariant derivatives are constant. In the Lorentzian case, the CSI spacetimes have been studied extensively due to their application to gravity theories. It is conjectured that a CSI spacetime i... |
1808.07392 | Xiao-Mei Kuang | Adolfo Cisterna, Shi-Qian Hu, Xiao-Mei Kuang | Joule-Thomson expansion in AdS black holes with momentum relaxation | 21 pages, 9 figures; Published version | Physics Letters B 797 (2019) 134883 | 10.1016/j.physletb.2019.134883 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inner structure of realistic materials make them exhibit momentum
relaxation. In this paper we study the holographic version of the Joule-Thomson
effect on AdS black holes in which translational invariance is broken by two
methods: First by considering planar black holes in general relativity
supported by axion s... | [
{
"created": "Wed, 22 Aug 2018 14:51:21 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Aug 2019 23:57:27 GMT",
"version": "v2"
}
] | 2019-08-29 | [
[
"Cisterna",
"Adolfo",
""
],
[
"Hu",
"Shi-Qian",
""
],
[
"Kuang",
"Xiao-Mei",
""
]
] | The inner structure of realistic materials make them exhibit momentum relaxation. In this paper we study the holographic version of the Joule-Thomson effect on AdS black holes in which translational invariance is broken by two methods: First by considering planar black holes in general relativity supported by axion sca... |
1711.04704 | Alexander Rudenko S. | A.D. Dolgov, S.I. Godunov, A.S. Rudenko | Evolution of thick domain walls in inflationary and $p=w\rho$ universe | 15 pages, 9 figures | Eur. Phys. J. C 78 (2018) no.10, 855 | 10.1140/epjc/s10052-018-6350-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of thick domain walls in the different models of
cosmological inflation, in the matter-dominated and radiation-dominated
universe, or more generally in the universe with the equation of state
$p=w\rho$. We have found that the domain wall evolution crucially depends on
the time-dependent paramet... | [
{
"created": "Mon, 13 Nov 2017 17:01:29 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Aug 2018 14:48:16 GMT",
"version": "v2"
}
] | 2018-11-02 | [
[
"Dolgov",
"A. D.",
""
],
[
"Godunov",
"S. I.",
""
],
[
"Rudenko",
"A. S.",
""
]
] | We study the evolution of thick domain walls in the different models of cosmological inflation, in the matter-dominated and radiation-dominated universe, or more generally in the universe with the equation of state $p=w\rho$. We have found that the domain wall evolution crucially depends on the time-dependent parameter... |
gr-qc/0304087 | Hans Stephani | Hans Stephani | LaPlace, Weimar, Schiller and the birth of black hole theory | 12 pages | null | null | null | gr-qc | null | From the original papers an interesting and surprising connection is
established between LaPlace and his early discovery that black holes may occur
in nature, and a poem by Schiller.
| [
{
"created": "Wed, 23 Apr 2003 10:00:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Stephani",
"Hans",
""
]
] | From the original papers an interesting and surprising connection is established between LaPlace and his early discovery that black holes may occur in nature, and a poem by Schiller. |
1309.1320 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev and Vladimir Folomeev | Kaluza-Klein wormholes with the compactified fifth dimension | 6 pages, 3 figures | Mod. Phys. Lett. A, Vol. 29, No. 4 (2014) 1450025 | 10.1142/S0217732314500254 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider wormhole solutions in five-dimensional Kaluza-Klein gravity in
the presence of a massless ghost four-dimensional scalar field. The system
possesses two types of topological nontriviality connected with the presence of
the scalar field and of a magnetic charge. Mathematically, the presence of the
charge ap... | [
{
"created": "Thu, 5 Sep 2013 11:49:11 GMT",
"version": "v1"
}
] | 2014-03-14 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | We consider wormhole solutions in five-dimensional Kaluza-Klein gravity in the presence of a massless ghost four-dimensional scalar field. The system possesses two types of topological nontriviality connected with the presence of the scalar field and of a magnetic charge. Mathematically, the presence of the charge appe... |
gr-qc/0001029 | Takeshi Chiba | Takeshi Chiba | Scalar-Tensor Gravity in Two 3-brane System | 8 pages, discussion expanded, references added | Phys.Rev.D62:021502,2000 | 10.1103/PhysRevD.62.021502 | UTAP-360 | gr-qc hep-th | null | We derive the low-energy effective action of four-dimensional gravity in the
Randall-Sundrum scenario in which two 3-branes of opposite tension reside in a
five-dimensional spacetime. The dimensional reduction with the Ansatz for the
radion field by Charmousis et al., which solves five-dimensional linearized
field eq... | [
{
"created": "Tue, 11 Jan 2000 11:36:20 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jun 2000 03:42:53 GMT",
"version": "v2"
}
] | 2009-12-30 | [
[
"Chiba",
"Takeshi",
""
]
] | We derive the low-energy effective action of four-dimensional gravity in the Randall-Sundrum scenario in which two 3-branes of opposite tension reside in a five-dimensional spacetime. The dimensional reduction with the Ansatz for the radion field by Charmousis et al., which solves five-dimensional linearized field equa... |
1311.0872 | Kent Yagi | Kent Yagi | Multipole Love Relations | 22 pages, 18 figures; universal relations for magnetic tidal
deformability corrected | Phys. Rev. D 89, 043011 (2014) | 10.1103/PhysRevD.89.043011 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave observations in the near future may allow us to measure
tidal deformabilities of neutron stars, which leads us to the understanding of
physics at nuclear density. In principle, the gravitational waveform depends on
various tidal parameters, which correlate strongly. Therefore, it would be
useful if... | [
{
"created": "Mon, 4 Nov 2013 21:00:02 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Nov 2013 01:22:42 GMT",
"version": "v2"
},
{
"created": "Fri, 4 May 2018 21:57:08 GMT",
"version": "v3"
},
{
"created": "Mon, 4 Jun 2018 19:33:40 GMT",
"version": "v4"
}
] | 2018-06-06 | [
[
"Yagi",
"Kent",
""
]
] | Gravitational-wave observations in the near future may allow us to measure tidal deformabilities of neutron stars, which leads us to the understanding of physics at nuclear density. In principle, the gravitational waveform depends on various tidal parameters, which correlate strongly. Therefore, it would be useful if o... |
1309.7206 | Torsten Asselmeyer-Maluga | T. Asselmeyer-Maluga and J. Krol | Decoherence in quantum cosmology and the cosmological constant | 8 pages, 1 figure, accepted in MPLA | Mod. Phys. Lett. A 28 (2013) 1350158 | 10.1142/S0217732313501587 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a spacetime having the topology of $S^{3}\times\mathbb{R}$ but
with a different smoothness structure. The initial state of the cosmos in our
model is identified with a wildly embedded 3-sphere (or a fractal space). In
previous work we showed that a wild embedding is obtained by a quantization of
a usual (o... | [
{
"created": "Fri, 27 Sep 2013 11:11:45 GMT",
"version": "v1"
}
] | 2013-09-30 | [
[
"Asselmeyer-Maluga",
"T.",
""
],
[
"Krol",
"J.",
""
]
] | We discuss a spacetime having the topology of $S^{3}\times\mathbb{R}$ but with a different smoothness structure. The initial state of the cosmos in our model is identified with a wildly embedded 3-sphere (or a fractal space). In previous work we showed that a wild embedding is obtained by a quantization of a usual (or ... |
1212.2623 | I-Sheng Yang | Lam Hui, Sean T. McWilliams, and I-Sheng Yang | Binary Systems as Resonance Detectors for Gravitational Waves | 8 pages, 1 figure. version 2, clarified several points thanks to
private communications with Marc Kamionkowski | null | 10.1103/PhysRevD.87.084009 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves at suitable frequencies can resonantly interact with a
binary system, inducing changes to its orbit. A stochastic gravitational-wave
background causes the orbital elements of the binary to execute a classic
random walk, with the variance of orbital elements growing with time. The lack
of such a ra... | [
{
"created": "Tue, 11 Dec 2012 20:50:31 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Mar 2013 07:38:45 GMT",
"version": "v2"
}
] | 2013-05-27 | [
[
"Hui",
"Lam",
""
],
[
"McWilliams",
"Sean T.",
""
],
[
"Yang",
"I-Sheng",
""
]
] | Gravitational waves at suitable frequencies can resonantly interact with a binary system, inducing changes to its orbit. A stochastic gravitational-wave background causes the orbital elements of the binary to execute a classic random walk, with the variance of orbital elements growing with time. The lack of such a rand... |
gr-qc/9609027 | Lee Samuel Finn | Lee Samuel Finn (Northwestern University) | Gravitational radiation sources for acoustic detectors | 11 pages, LaTeX type, sprocl.sty, to appear in the proceedings of
OMNI-1: The first international workshop for an omnidirectional
gravitational-wave observatory | null | null | null | gr-qc astro-ph | null | When completed, the gravitational wave detectors now proposed or under
construction will provide us with a perspective on the Universe fundamentally
different from any we have come to know. With this new perspective comes the
hope that new insights and understandings of Nature will emerge. The proposed
acoustic detec... | [
{
"created": "Wed, 11 Sep 1996 13:49:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Finn",
"Lee Samuel",
"",
"Northwestern University"
]
] | When completed, the gravitational wave detectors now proposed or under construction will provide us with a perspective on the Universe fundamentally different from any we have come to know. With this new perspective comes the hope that new insights and understandings of Nature will emerge. The proposed acoustic detecto... |
2105.11511 | Saeed Rastgoo | Keagan Blanchette, Saurya Das, Saeed Rastgoo | Effective GUP-modified Raychaudhuri equation and black hole singularity:
four models | 26 pages, 6 figures; v2: matches JHEP published version | J. High Energ. Phys. 2021, 62 (2021) | 10.1007/JHEP09(2021)062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The classical Raychaudhuri equation predicts the formation of conjugate
points for a congruence of geodesics, in a finite proper time. This in
conjunction with the Hawking-Penrose singularity theorems predicts the
incompleteness of geodesics and thereby the singular nature of practically all
spacetimes. We compute th... | [
{
"created": "Mon, 24 May 2021 19:33:37 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Sep 2021 18:31:35 GMT",
"version": "v2"
}
] | 2021-09-16 | [
[
"Blanchette",
"Keagan",
""
],
[
"Das",
"Saurya",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | The classical Raychaudhuri equation predicts the formation of conjugate points for a congruence of geodesics, in a finite proper time. This in conjunction with the Hawking-Penrose singularity theorems predicts the incompleteness of geodesics and thereby the singular nature of practically all spacetimes. We compute the ... |
1112.5253 | Matt Visser | Prado Martin-Moruno (Victoria University of Wellington), Nadiezhda
Montelongo Garcia (CINVESTAV, IPN, Universidade de Lisboa), Francisco S. N.
Lobo (Universidade de Lisboa), and Matt Visser (Victoria University of
Wellington) | Generic thin-shell gravastars | V1: 39 pages, 9 figures; V2: 40 pages, 9 figures. References added,
some discussion added, some typos fixed. Identical to published version.
arXiv admin note: text overlap with arXiv:1112.2057 | JCAP 03 (2012) 034 | 10.1088/1475-7516/2012/03/034 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct generic spherically symmetric thin-shell gravastars by using the
cut-and-paste procedure. We take considerable effort to make the analysis as
general and unified as practicable; investigating both the internal physics of
the transition layer and its interaction with "external forces" arising due to
inter... | [
{
"created": "Thu, 22 Dec 2011 09:18:57 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Mar 2012 03:55:50 GMT",
"version": "v2"
}
] | 2012-08-15 | [
[
"Martin-Moruno",
"Prado",
"",
"Victoria University of Wellington"
],
[
"Garcia",
"Nadiezhda Montelongo",
"",
"CINVESTAV, IPN, Universidade de Lisboa"
],
[
"Lobo",
"Francisco S. N.",
"",
"Universidade de Lisboa"
],
[
"Visser",
"Matt",
"",
... | We construct generic spherically symmetric thin-shell gravastars by using the cut-and-paste procedure. We take considerable effort to make the analysis as general and unified as practicable; investigating both the internal physics of the transition layer and its interaction with "external forces" arising due to interac... |
2111.06767 | Nils Leif Vu | Nils L. Vu, Harald P. Pfeiffer, Gabriel S. Bonilla, Nils Deppe,
Fran\c{c}ois H\'ebert, Lawrence E. Kidder, Geoffrey Lovelace, Jordan Moxon,
Mark A. Scheel, Saul A. Teukolsky, William Throwe, Nikolas A. Wittek, Tom
W{\l}odarczyk | A scalable elliptic solver with task-based parallelism for the SpECTRE
numerical relativity code | 25 pages, 20 figures, published version. Results are reproducible
with the ancillary input files | Phys. Rev. D 105, 084027 (2022) | 10.1103/PhysRevD.105.084027 | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Elliptic partial differential equations must be solved numerically for many
problems in numerical relativity, such as initial data for every simulation of
merging black holes and neutron stars. Existing elliptic solvers can take
multiple days to solve these problems at high resolution and when matter is
involved, bec... | [
{
"created": "Fri, 12 Nov 2021 15:23:45 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2022 15:18:07 GMT",
"version": "v2"
}
] | 2022-04-19 | [
[
"Vu",
"Nils L.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Bonilla",
"Gabriel S.",
""
],
[
"Deppe",
"Nils",
""
],
[
"Hébert",
"François",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Lovelace",
"Geoffrey",
""
... | Elliptic partial differential equations must be solved numerically for many problems in numerical relativity, such as initial data for every simulation of merging black holes and neutron stars. Existing elliptic solvers can take multiple days to solve these problems at high resolution and when matter is involved, becau... |
2006.03540 | Paul Abel | Derek J. Raine, Paul G. Abel | Quantum Optics of an Oscillator Falling into a Black Hole | 28 pages, 1 figure | null | 10.1088/1361-6382/abc8c8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a quantum optics treatment of the near horizon behaviour of a
quantum oscillator freely-falling into a pre-existing Schwarzschild black hole.
We use Painleve-Gullstrand coordinates to define a global vacuum state. In
contrast to an accelerated oscillator in the Minkowski vacuum, where there is
no radiation... | [
{
"created": "Fri, 5 Jun 2020 16:28:04 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Raine",
"Derek J.",
""
],
[
"Abel",
"Paul G.",
""
]
] | We present a quantum optics treatment of the near horizon behaviour of a quantum oscillator freely-falling into a pre-existing Schwarzschild black hole. We use Painleve-Gullstrand coordinates to define a global vacuum state. In contrast to an accelerated oscillator in the Minkowski vacuum, where there is no radiation b... |
1712.04813 | Przemyslaw Malkiewicz | Przemys{\l}aw Ma{\l}kiewicz, Artur Miroszewski, Herv\'e Bergeron | Quantum phase space trajectories with application to quantum cosmology | 11 pages, 4 figures, the new version contains improved discussions | Phys. Rev. D 98, 026030 (2018) | 10.1103/PhysRevD.98.026030 | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop an approach to quantum dynamics based on quantum phase space
trajectories. The latter are built from a unitary irreducible representation of
the symmetry group of the respective classical phase space. We use a quantum
action functional to derive the basic equations. In principle, our formulation
is equival... | [
{
"created": "Wed, 13 Dec 2017 15:16:30 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2018 09:26:02 GMT",
"version": "v2"
}
] | 2018-08-08 | [
[
"Małkiewicz",
"Przemysław",
""
],
[
"Miroszewski",
"Artur",
""
],
[
"Bergeron",
"Hervé",
""
]
] | We develop an approach to quantum dynamics based on quantum phase space trajectories. The latter are built from a unitary irreducible representation of the symmetry group of the respective classical phase space. We use a quantum action functional to derive the basic equations. In principle, our formulation is equivalen... |
gr-qc/0410051 | Riccardo Sturani | Orestis Malaspinas and Riccardo Sturani (U. of Geneva) | Detecting a stochastic background of gravitational waves by correlating
n detectors | 12 pages, version accepted by Class. & Quant. Grav | Class.Quant.Grav. 23 (2006) 319-328 | 10.1088/0264-9381/23/2/003 | null | gr-qc | null | We discuss the optimal detection strategy for a stochastic background of
gravitational waves in the case n detectors are available. In literature so
far, only two cases have been considered: 2- and n-point correlators. We
generalize these analysises to m-point correlators (with m<n) built out of the
n detector signal... | [
{
"created": "Tue, 12 Oct 2004 14:06:12 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Nov 2005 14:17:21 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Malaspinas",
"Orestis",
"",
"U. of Geneva"
],
[
"Sturani",
"Riccardo",
"",
"U. of Geneva"
]
] | We discuss the optimal detection strategy for a stochastic background of gravitational waves in the case n detectors are available. In literature so far, only two cases have been considered: 2- and n-point correlators. We generalize these analysises to m-point correlators (with m<n) built out of the n detector signals,... |
1808.10206 | Alexander Silenko | Alexander J. Silenko and Yury A. Tsalkou | Quasi-uniform gravitational field of a disk revisited | 32 pages | null | 10.1142/S0217751X19502282 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the quasi-uniform gravitational field of a disk in the
weak-field approximation and demonstrate an inappropriateness of preceding
results. The Riemann tensor of this field is determined. The nonexistence of
the uniform gravitational field is proven without the use of the weak-field
approximation. The pre... | [
{
"created": "Thu, 30 Aug 2018 10:14:03 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Nov 2019 17:19:09 GMT",
"version": "v2"
}
] | 2020-01-29 | [
[
"Silenko",
"Alexander J.",
""
],
[
"Tsalkou",
"Yury A.",
""
]
] | We calculate the quasi-uniform gravitational field of a disk in the weak-field approximation and demonstrate an inappropriateness of preceding results. The Riemann tensor of this field is determined. The nonexistence of the uniform gravitational field is proven without the use of the weak-field approximation. The previ... |
1507.03714 | Roldao da Rocha | R. T. Cavalcanti, Roldao da Rocha | Dark Spinors Hawking Radiation in String Theory Black Holes | 11 pages, improved version, to appear in AHEP | Adv.High Energy Phys. 2016 (2016) 4681902 | 10.1155/2016/4681902 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hawking radiation spectrum of Kerr-Sen axion-dilaton black holes is
derived, in the context of dark spinors tunnelling across the horizon. Since a
black hole has a well defined temperature, it should radiate in principle all
the standard model particles, similar to a black body at that temperature. We
investigate... | [
{
"created": "Tue, 14 Jul 2015 03:54:52 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jan 2016 21:56:14 GMT",
"version": "v2"
}
] | 2016-01-14 | [
[
"Cavalcanti",
"R. T.",
""
],
[
"da Rocha",
"Roldao",
""
]
] | The Hawking radiation spectrum of Kerr-Sen axion-dilaton black holes is derived, in the context of dark spinors tunnelling across the horizon. Since a black hole has a well defined temperature, it should radiate in principle all the standard model particles, similar to a black body at that temperature. We investigate t... |
2207.02564 | Bart{\l}omiej Kiczek | Bartlomiej Kiczek and Marek Rogatko | Static axionlike dark matter clouds around magnetized rotating wormholes
-- probe limit case | null | Eur. Phys. J. C 82, 586 (2022) | 10.1140/epjc/s10052-022-10545-0 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The problem of the distribution of axionlike particle, being the model of
dark matter, in the nearby of rotating wormholes has been investigated
numerically. In the model in question the axion scalar is non-trivially coupled
to the Maxwell gauge field. We consider two toy models of rotating wormholes
embedded in magn... | [
{
"created": "Wed, 6 Jul 2022 10:23:09 GMT",
"version": "v1"
}
] | 2022-07-07 | [
[
"Kiczek",
"Bartlomiej",
""
],
[
"Rogatko",
"Marek",
""
]
] | The problem of the distribution of axionlike particle, being the model of dark matter, in the nearby of rotating wormholes has been investigated numerically. In the model in question the axion scalar is non-trivially coupled to the Maxwell gauge field. We consider two toy models of rotating wormholes embedded in magnet... |
1605.06011 | Paul G.N. de Vegvar | P. G. N. de Vegvar | Commutative deformations of general relativity: nonlocality, causality,
and dark matter | 47 pages including references, 0 figures, 0 tables Various
typos/omissions corrected | The Europhysical Jornal C, 77(1) 1-26, January 30, 2016 | 10.1140/epjc/s10052-017-4605-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hopf algebra methods are applied to study Drinfeld twists of
(3+1)-diffeomorphisms and deformed general relativity on \emph{commutative}
manifolds. A classical nonlocality length scale is produced above which
microcausality emerges. Matter fields are utilized to generate self-consistent
Abelian Drinfeld twists in a b... | [
{
"created": "Mon, 16 May 2016 02:25:15 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2016 18:36:40 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Dec 2016 02:26:34 GMT",
"version": "v3"
},
{
"created": "Sun, 1 Jan 2017 20:47:13 GMT",
"version": "v4"
}
] | 2017-03-08 | [
[
"de Vegvar",
"P. G. N.",
""
]
] | Hopf algebra methods are applied to study Drinfeld twists of (3+1)-diffeomorphisms and deformed general relativity on \emph{commutative} manifolds. A classical nonlocality length scale is produced above which microcausality emerges. Matter fields are utilized to generate self-consistent Abelian Drinfeld twists in a bac... |
gr-qc/0302032 | Simonetta Frittelli | Simonetta Frittelli (Duquesne University) and Roberto Gomez
(Pittsburgh Supercomputing Center) | Boundary conditions for hyperbolic formulations of the Einstein
equations | 15 pages; text added and typesetting errors corrected; to appear in
Classical and Quantum Gravity | Class.Quant.Grav.20:2379-2392,2003 | 10.1088/0264-9381/20/11/327 | null | gr-qc | null | In regards to the initial-boundary value problem of the Einstein equations,
we argue that the projection of the Einstein equations along the normal to the
boundary yields necessary and appropriate boundary conditions for a wide class
of equivalent formulations. We explicitly show that this is so for the
Einstein-Chri... | [
{
"created": "Mon, 10 Feb 2003 14:54:47 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Apr 2003 19:13:07 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Frittelli",
"Simonetta",
"",
"Duquesne University"
],
[
"Gomez",
"Roberto",
"",
"Pittsburgh Supercomputing Center"
]
] | In regards to the initial-boundary value problem of the Einstein equations, we argue that the projection of the Einstein equations along the normal to the boundary yields necessary and appropriate boundary conditions for a wide class of equivalent formulations. We explicitly show that this is so for the Einstein-Christ... |
gr-qc/9602005 | null | A. Chamorro and K. S. Virbhadra | Energy of a spherically symmetric charged dilaton black hole | 3 pages, LaTex, Published in "Inhomogeneous Cosmological Models",
(Eds. A Molina and J M M Senovilla, World Scientific, Singapore 1995), Pages
230-232 | null | null | null | gr-qc astro-ph hep-th | null | The energy associated with a static and spherically symmetric charged dilaton
black hole is obtained for arbitrary value of the coupling parameter (which
regulates the strength of the coupling of the dilaton to the Maxwell field)
$\beta$. The energy distribution depends on $\beta$, whereas the total energy
is indepen... | [
{
"created": "Fri, 2 Feb 1996 08:37:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chamorro",
"A.",
""
],
[
"Virbhadra",
"K. S.",
""
]
] | The energy associated with a static and spherically symmetric charged dilaton black hole is obtained for arbitrary value of the coupling parameter (which regulates the strength of the coupling of the dilaton to the Maxwell field) $\beta$. The energy distribution depends on $\beta$, whereas the total energy is independe... |
1302.7170 | Chul-Moon Yoo | Chul-Moon Yoo, Tomohiro Harada and Naoki Tsukamoto | Wave Effect in Gravitational Lensing by the Ellis Wormhole | 18 pages, 8 figures | null | 10.1103/PhysRevD.87.084045 | YITP-13-15, RUP-13-3 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the use of modulated spectra of astronomical sources due to
gravitational lensing to probe Ellis wormholes. The modulation factor due to
gravitational lensing by the Ellis wormhole is calculated. Within the
geometrical optics approximation, the normal point mass lens and the Ellis
wormhole are indistinguis... | [
{
"created": "Thu, 28 Feb 2013 12:31:02 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2013 12:26:12 GMT",
"version": "v2"
}
] | 2013-04-24 | [
[
"Yoo",
"Chul-Moon",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Tsukamoto",
"Naoki",
""
]
] | We propose the use of modulated spectra of astronomical sources due to gravitational lensing to probe Ellis wormholes. The modulation factor due to gravitational lensing by the Ellis wormhole is calculated. Within the geometrical optics approximation, the normal point mass lens and the Ellis wormhole are indistinguisha... |
1005.4102 | Xin-Zhou Li | Ping Xi, Xi-chen Ao and Xin-zhou Li | A simple derivation of level spacing of quasinormal frequencies for a
black hole with a deficit solid angle and quintessence-like matter | 6 pages, Accepted for publication in Astrophysics & Space Science | Astrophys.Space Sci.330:273-278,2010 | 10.1007/s10509-010-0410-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate analytically the level space of the imaginary
part of quasinormal frequencies for a black hole with a deficit solid angle and
quintessence-like matter by the Padmanabhan's method \cite{Padmanabhan}.
Padmanabhan presented a method to study analytically the imaginary part of
quasinormal fr... | [
{
"created": "Sat, 22 May 2010 03:26:11 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 2010 01:56:33 GMT",
"version": "v2"
}
] | 2010-11-05 | [
[
"Xi",
"Ping",
""
],
[
"Ao",
"Xi-chen",
""
],
[
"Li",
"Xin-zhou",
""
]
] | In this paper, we investigate analytically the level space of the imaginary part of quasinormal frequencies for a black hole with a deficit solid angle and quintessence-like matter by the Padmanabhan's method \cite{Padmanabhan}. Padmanabhan presented a method to study analytically the imaginary part of quasinormal freq... |
2101.04496 | Sujay Kr. Biswas | Goutam Mandal, Soumya Chakraborty, Sudip Mishra and Sujay Kr. Biswas | A study of interacting scalar field model from the perspective of the
dynamical systems theory | 29 pages, 10 captioned figures. Title changed. The paper is revised
thoroughly. The version is published in The Physics of the Dark Universe | Phys.Dark Univ. 40 (2023) 101210 | 10.1016/j.dark.2023.101210 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, considering the background dynamics of flat
Friedmann-Lemaitre-Robertson-Walker(FLRW) model of the universe, we investigate
a scalar field model as dark energy candidate which interacting with the
pressure-less dust as dark matter from dynamical systems perspective. From
phenomenological vantage point t... | [
{
"created": "Sat, 9 Jan 2021 15:45:38 GMT",
"version": "v1"
},
{
"created": "Wed, 24 May 2023 13:21:04 GMT",
"version": "v2"
}
] | 2023-05-25 | [
[
"Mandal",
"Goutam",
""
],
[
"Chakraborty",
"Soumya",
""
],
[
"Mishra",
"Sudip",
""
],
[
"Biswas",
"Sujay Kr.",
""
]
] | In this work, considering the background dynamics of flat Friedmann-Lemaitre-Robertson-Walker(FLRW) model of the universe, we investigate a scalar field model as dark energy candidate which interacting with the pressure-less dust as dark matter from dynamical systems perspective. From phenomenological vantage point two... |
2309.14061 | Daiki Watarai | Daiki Watarai, Atsushi Nishizawa, Kipp Cannon | Physically consistent gravitational waveform for capturing beyond
general relativity effects in the compact object merger phase | 21 pages, 10 figures | null | null | RESCEU-21/23 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The merger phase of compact binary coalescences is the strongest gravity
regime that can be observed. To test the validity of general relativity (GR) in
strong gravitational fields, we propose a gravitational waveform parameterized
for deviations from GR in the dynamical and nonlinear regime of gravity. Our
fundament... | [
{
"created": "Mon, 25 Sep 2023 11:53:59 GMT",
"version": "v1"
}
] | 2023-09-26 | [
[
"Watarai",
"Daiki",
""
],
[
"Nishizawa",
"Atsushi",
""
],
[
"Cannon",
"Kipp",
""
]
] | The merger phase of compact binary coalescences is the strongest gravity regime that can be observed. To test the validity of general relativity (GR) in strong gravitational fields, we propose a gravitational waveform parameterized for deviations from GR in the dynamical and nonlinear regime of gravity. Our fundamental... |
1806.07160 | Paul Frampton | P.H. Frampton | Cyclic Cosmology and Holographic Entanglement Entropy | 8 pages LaTex. Talk at Conference on Particle and Cosmology, Nanyang
Technological University, Singapore. March 5-9, 2018 | null | 10.1142/S0217751X18440281 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | No abstract prepared.
| [
{
"created": "Tue, 19 Jun 2018 11:29:03 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Frampton",
"P. H.",
""
]
] | No abstract prepared. |
1509.02481 | Ott Vilson | Ott Vilson | Some remarks concerning invariant quantities in scalar-tensor gravity | 16 pages, Advances in Applied Clifford Algebras 2015 | Adv. Appl. Clifford Algebras 27, 321-332 (2017) | 10.1007/s00006-015-0567-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of the current paper is to clarify some aspects of the formalism used
for describing the scalar-tensor gravity characterized by four arbitrary local
functionals of the scalar field. We recall the objects that are invariant with
respect to a spacetime point under the local Weyl rescaling of the metric and
unde... | [
{
"created": "Tue, 8 Sep 2015 18:18:10 GMT",
"version": "v1"
}
] | 2017-06-13 | [
[
"Vilson",
"Ott",
""
]
] | The aim of the current paper is to clarify some aspects of the formalism used for describing the scalar-tensor gravity characterized by four arbitrary local functionals of the scalar field. We recall the objects that are invariant with respect to a spacetime point under the local Weyl rescaling of the metric and under ... |
gr-qc/0606064 | Piotr T. Chru\'sciel | Piotr T. Chrusciel, Daniel Maerten, Paul Tod | Rigid upper bounds for the angular momentum and centre of mass of
non-singular asymptotically anti-de Sitter space-times | improvements in the presentation; some statements corrected | JHEP 0611 (2006) 084 | 10.1088/1126-6708/2006/11/084 | AEI-2006-041 | gr-qc hep-th | null | We prove upper bounds on angular momentum and centre of mass in terms of the
Hamiltonian mass and cosmological constant for non-singular asymptotically
anti-de Sitter initial data sets satisfying the dominant energy condition. We
work in all space-dimensions larger than or equal to three, and allow a large
class of a... | [
{
"created": "Wed, 14 Jun 2006 21:53:25 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Nov 2006 13:22:52 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Maerten",
"Daniel",
""
],
[
"Tod",
"Paul",
""
]
] | We prove upper bounds on angular momentum and centre of mass in terms of the Hamiltonian mass and cosmological constant for non-singular asymptotically anti-de Sitter initial data sets satisfying the dominant energy condition. We work in all space-dimensions larger than or equal to three, and allow a large class of asy... |
1512.02639 | Kent Yagi | Kent Yagi and Nicolas Yunes | Binary Love Relations | 10 pages, 4 figures; fitting formulas added, accepted to CQG Letter | null | 10.1088/0264-9381/33/13/13LT01 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When in a tight binary, the mutual tidal deformations of neutron stars
imprint onto observables, encoding information about their internal structure
at supranuclear densities and gravity in the extreme-gravity regime.
Gravitational wave observations of their late binary inspiral may serve as a
tool to extract the ind... | [
{
"created": "Tue, 8 Dec 2015 21:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jun 2016 17:57:29 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | When in a tight binary, the mutual tidal deformations of neutron stars imprint onto observables, encoding information about their internal structure at supranuclear densities and gravity in the extreme-gravity regime. Gravitational wave observations of their late binary inspiral may serve as a tool to extract the indiv... |
1006.0192 | Adriano Contillo | Alfio Bonanno, Adriano Contillo, Roberto Percacci | Inflationary solutions in asymptotically safe f(R) theories | 25 pages, 6 figures; accepted for publication in Clas.Quant.Grav | Class.Quant.Grav.28:145026,2011 | 10.1088/0264-9381/28/14/145026 | PI-QG-185 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the existence of inflationary solutions in a class of
renormalization group improved polynomial f(R) theories, which have been
studied recently in the context of the asymptotic safety scenario for quantum
gravity. These theories seem to possess a nontrivial ultraviolet fixed point,
where the dimensionful c... | [
{
"created": "Tue, 1 Jun 2010 17:32:18 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2011 13:21:57 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Bonanno",
"Alfio",
""
],
[
"Contillo",
"Adriano",
""
],
[
"Percacci",
"Roberto",
""
]
] | We discuss the existence of inflationary solutions in a class of renormalization group improved polynomial f(R) theories, which have been studied recently in the context of the asymptotic safety scenario for quantum gravity. These theories seem to possess a nontrivial ultraviolet fixed point, where the dimensionful cou... |
2203.00413 | Mouhssine Koussour | M. Koussour, S. H. Shekh, A. Hanin, Z. Sakhi, S. R. Bhoyer and M.
Bennai | Flat FLRW Universe in logarithmic symmetric teleparallel gravity with
observational constraints | CQG accepted version | Classical and Quantum Gravity (2022) | 10.1088/1361-6382/ac8c7d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the homogeneous and isotropic flat FLRW
Universe in the logarithmic form of $f\left( Q\right) $ gravity, where $% Q $
is the non-metricity scalar, specifically, $f\left( Q\right) =\alpha +\beta
\log \left( Q\right) $, where $\alpha $ and $\beta $ are free model parameters.
In this study,... | [
{
"created": "Sun, 27 Feb 2022 17:25:54 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Aug 2022 20:29:20 GMT",
"version": "v2"
}
] | 2022-08-30 | [
[
"Koussour",
"M.",
""
],
[
"Shekh",
"S. H.",
""
],
[
"Hanin",
"A.",
""
],
[
"Sakhi",
"Z.",
""
],
[
"Bhoyer",
"S. R.",
""
],
[
"Bennai",
"M.",
""
]
] | In this paper, we investigate the homogeneous and isotropic flat FLRW Universe in the logarithmic form of $f\left( Q\right) $ gravity, where $% Q $ is the non-metricity scalar, specifically, $f\left( Q\right) =\alpha +\beta \log \left( Q\right) $, where $\alpha $ and $\beta $ are free model parameters. In this study, w... |
1108.5991 | Jonathan Halliwell | J.J.Halliwell | Decoherent Histories Analysis of Minisuperspace Quantum Cosmology | To appear in Proceedings of the 2010 DICE Conference | J. Phys.: Conf. Ser.. 306: 012023 (2011) | 10.1088/1742-6596/306/1/012023 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent results on the decoherent histories quantization of simple
cosmological models (minisuperspace models) are described. The most important
issue is the construction, from the wave function, of a probability
distribution answering various questions of physical interest, such as the
probability of the system enter... | [
{
"created": "Tue, 30 Aug 2011 15:55:04 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Halliwell",
"J. J.",
""
]
] | Recent results on the decoherent histories quantization of simple cosmological models (minisuperspace models) are described. The most important issue is the construction, from the wave function, of a probability distribution answering various questions of physical interest, such as the probability of the system enterin... |
1208.0531 | Arman Shokrollahi | Arman Shokrollahi | Free Motion of a Dirac Particle with a Minimum Uncertainty in Position | 14 pages . . . accepted for publication in Reports on Mathematical
Physics. arXiv admin note: text overlap with arXiv:1103.1015,arXiv:1103.3805
by different authors | null | 10.1016/S0034-4877(13)60009-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a covariant, relativistic noncommutative algebra
which includes two small deformation parameters. Using this algebra, we obtain
a generalized uncertainty principle which predicts a minimal observable length
in measure of space-time distances. Then, we introduce a new representation for
coord... | [
{
"created": "Thu, 2 Aug 2012 16:22:02 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2012 15:38:28 GMT",
"version": "v2"
}
] | 2013-04-18 | [
[
"Shokrollahi",
"Arman",
""
]
] | In this paper, we present a covariant, relativistic noncommutative algebra which includes two small deformation parameters. Using this algebra, we obtain a generalized uncertainty principle which predicts a minimal observable length in measure of space-time distances. Then, we introduce a new representation for coordin... |
gr-qc/9303021 | null | Isidore Hauser and Frederick J. Ernst | Non-Analytic Extension of the Kinnersley-Chitre Group for Colliding
Plane Gravitational Waves. I | 65, FJE-93-001 | null | null | null | gr-qc | null | A program is outlined concerning the set of all solutions of the hyperbolic
Ernst equation on a two-dimensional manifold whose underlying topological space
is the same as the domain of all Ernst potentials for colliding plane
gravitational wave pairs. The aim of the program is to construct and apply a
non-trivial ext... | [
{
"created": "Wed, 17 Mar 1993 15:37:09 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Mar 1993 15:04:41 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Hauser",
"Isidore",
""
],
[
"Ernst",
"Frederick J.",
""
]
] | A program is outlined concerning the set of all solutions of the hyperbolic Ernst equation on a two-dimensional manifold whose underlying topological space is the same as the domain of all Ernst potentials for colliding plane gravitational wave pairs. The aim of the program is to construct and apply a non-trivial exten... |
gr-qc/0204079 | Renaud Parentani | Renaud Parentani | What did we learn from studying acoustic black holes ? | 6 pages, Proceedings of the ``Journees Relativistes'' Dublin, Sept.
2001 | Int.J.Mod.Phys. A17 (2002) 2721-2726 | 10.1142/S0217751X02011679 | null | gr-qc | null | The study of acoustic black holes has been undertaken to provide new insights
about the role of high frequencies in black hole evaporation. Because of the
infinite gravitational redshift from the event horizon, Hawking quanta emerge
from configurations which possessed ultra high (trans-Planckian) frequencies.
Therefo... | [
{
"created": "Fri, 26 Apr 2002 10:02:27 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Parentani",
"Renaud",
""
]
] | The study of acoustic black holes has been undertaken to provide new insights about the role of high frequencies in black hole evaporation. Because of the infinite gravitational redshift from the event horizon, Hawking quanta emerge from configurations which possessed ultra high (trans-Planckian) frequencies. Therefore... |
2207.03266 | J\'er\'emy Auffinger | J\'er\'emy Auffinger, Alexandre Arbey | Beyond the Standard Model with BlackHawk v2.0 | 8 pages, 4 figures, contribution to CompTools 2021. arXiv admin note:
text overlap with arXiv:2108.02737 | PoS (CompTools2021) 017 | null | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | We present the new version of BlackHawk v2.0. BlackHawk is a public code
designed to compute the Hawking radiation spectra of (primordial) black holes.
In the version 2.0, we have added several non-standard BH metrics: charged,
higher dimensional and polymerized black holes, in addition to the usual
rotating (Kerr) B... | [
{
"created": "Thu, 7 Jul 2022 12:39:21 GMT",
"version": "v1"
}
] | 2022-07-08 | [
[
"Auffinger",
"Jérémy",
""
],
[
"Arbey",
"Alexandre",
""
]
] | We present the new version of BlackHawk v2.0. BlackHawk is a public code designed to compute the Hawking radiation spectra of (primordial) black holes. In the version 2.0, we have added several non-standard BH metrics: charged, higher dimensional and polymerized black holes, in addition to the usual rotating (Kerr) BHs... |
gr-qc/9404001 | Charles Hellaby | Charles Hellaby and Tevian Dray | Failure of Standard Conservation Laws at a Classical Change of Signature | 15pp, figures available on request from Charles Hellaby at
cwh@maths.uct.ac.za | Phys.Rev. D49 (1994) 5096-5104 | 10.1103/PhysRevD.49.5096 | University of Cape Town Preprint UCT 1994 | gr-qc | null | The Divergence Theorem as usually stated cannot be applied across a change of
signature unless it is re-expressed to allow for a finite source term on the
signature change surface. Consequently all conservation laws must also be
`modified', and therefore insistence on conservation of matter across such a
surface cann... | [
{
"created": "Sat, 2 Apr 1994 10:52:26 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Hellaby",
"Charles",
""
],
[
"Dray",
"Tevian",
""
]
] | The Divergence Theorem as usually stated cannot be applied across a change of signature unless it is re-expressed to allow for a finite source term on the signature change surface. Consequently all conservation laws must also be `modified', and therefore insistence on conservation of matter across such a surface cannot... |
2204.03048 | Pedro Jose Pompeia P. J. Pompeia | R. R. Cuzinatto, M. de Montigny, P. J. Pompeia | Non-commutativity and non-inertial effects on a scalar field in a cosmic
string space-time. Part 1: Klein-Gordon oscillator | 31 pages, 4 figures, 2 tables | Class. Quantum Grav. 39 (2022) 075006 | 10.1088/1361-6382/ac51bb | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the Klein-Gordon oscillator in a cosmic string space-time and
study the effects stemming from the rotating frame and non-commutativity in
momentum space. We show that the latter mimics a constant magnetic field,
imparting physical interpretation to the setup. The field equation for the
scalar field is solv... | [
{
"created": "Wed, 6 Apr 2022 19:20:47 GMT",
"version": "v1"
}
] | 2022-04-08 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"de Montigny",
"M.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | We analyse the Klein-Gordon oscillator in a cosmic string space-time and study the effects stemming from the rotating frame and non-commutativity in momentum space. We show that the latter mimics a constant magnetic field, imparting physical interpretation to the setup. The field equation for the scalar field is solved... |
1412.7643 | Andrea Geralico | Donato Bini, Andrea Geralico | Effect of an arbitrary spin orientation on the quadrupolar structure of
an extended body in a Schwarzschild spacetime | 15 pages, 3 figures; revised version matching the published one | Phys. Rev. D 91, 104036 (2015) | 10.1103/PhysRevD.91.104036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The influence of an arbitrary spin orientation on the quadrupolar structure
of an extended body moving in a Schwarzschild spacetime is investigated. The
body dynamics is described by the Mathisson-Papapetrou-Dixon model, without any
restriction on the motion or simplifying assumption on the associated spin
vector and... | [
{
"created": "Wed, 24 Dec 2014 11:06:47 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2015 10:59:22 GMT",
"version": "v2"
}
] | 2015-09-17 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | The influence of an arbitrary spin orientation on the quadrupolar structure of an extended body moving in a Schwarzschild spacetime is investigated. The body dynamics is described by the Mathisson-Papapetrou-Dixon model, without any restriction on the motion or simplifying assumption on the associated spin vector and q... |
1106.4203 | Jan Steinhoff | Jan Steinhoff | Canonical Formulation of Spin in General Relativity | 59 pages. Dissertation, Friedrich-Schiller-Universit\"at, Jena, 2010.
This thesis was submitted in June 2010. Cite as Ann. Phys. (Berlin) 523:296
(2011) | Ann. Phys. (Berlin) 523:296 (2011) | 10.1002/andp.201000178 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present thesis aims at an extension of the canonical formalism of
Arnowitt, Deser, and Misner from self-gravitating point-masses to objects with
spin. This would allow interesting applications, e.g., within the
post-Newtonian (PN) approximation. The extension succeeded via an action
approach to linear order in th... | [
{
"created": "Tue, 21 Jun 2011 13:45:40 GMT",
"version": "v1"
}
] | 2011-06-22 | [
[
"Steinhoff",
"Jan",
""
]
] | The present thesis aims at an extension of the canonical formalism of Arnowitt, Deser, and Misner from self-gravitating point-masses to objects with spin. This would allow interesting applications, e.g., within the post-Newtonian (PN) approximation. The extension succeeded via an action approach to linear order in the ... |
1706.07790 | Heba Sami | Heba Sami, Neo Namane, Joseph Ntahompagaze, Maye Elmardi and Amare
Abebe | Reconstructing f(R) Gravity from a Chaplygin Scalar Field in de Sitter
Spacetimes | 20 pages, 10 figures | null | 10.1142/S0219887818500275 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a reconstruction technique for models of $f(R)$ gravity from the
Chaplygin scalar field in flat de Sitter spacetimes. Exploiting the equivalence
between $f(R)$ gravity and scalar-tensor theories, and treating the Chaplygin
gas as a scalar field model in a universe without conventional matter forms,
the Lag... | [
{
"created": "Fri, 23 Jun 2017 17:53:44 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jun 2017 13:32:01 GMT",
"version": "v2"
}
] | 2018-02-14 | [
[
"Sami",
"Heba",
""
],
[
"Namane",
"Neo",
""
],
[
"Ntahompagaze",
"Joseph",
""
],
[
"Elmardi",
"Maye",
""
],
[
"Abebe",
"Amare",
""
]
] | We present a reconstruction technique for models of $f(R)$ gravity from the Chaplygin scalar field in flat de Sitter spacetimes. Exploiting the equivalence between $f(R)$ gravity and scalar-tensor theories, and treating the Chaplygin gas as a scalar field model in a universe without conventional matter forms, the Lagra... |
gr-qc/9902046 | Scott M. Hitchcock | Scott Hitchcock | Quantum Clocks and the Origin of Time in Complex Systems | 17 pages, LaTeX file, Revised and updated | null | null | MSUCL-1123 | gr-qc | null | The origin and nature of time in complex systems is explored using quantum
(or 'Feynman') clocks and the signals produced by them. Networks of these
clocks provide the basis for the evolution of complex systems. The general
concept of 'time' is translated into the 'lifetimes' of these unstable
configurations of matte... | [
{
"created": "Tue, 16 Feb 1999 18:05:30 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Feb 1999 21:06:51 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Hitchcock",
"Scott",
""
]
] | The origin and nature of time in complex systems is explored using quantum (or 'Feynman') clocks and the signals produced by them. Networks of these clocks provide the basis for the evolution of complex systems. The general concept of 'time' is translated into the 'lifetimes' of these unstable configurations of matter.... |
2211.05664 | Serge Parnovsky | S L Parnovsky | The Big Bang could be anisotropic. The case of Bianchi I model | 15 pages, no figures | null | 10.1088/1361-6382/acd7c2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an evolution of anisotropic cosmological model on the example of
the Bianchi type I homogeneous universe. It is filled by the mixture of matter
and dark energy with an arbitrary barotropic equation of state (EoS). The
general solution for this case is found and analyzed. A complete list of
possible future... | [
{
"created": "Thu, 10 Nov 2022 15:59:19 GMT",
"version": "v1"
}
] | 2023-06-14 | [
[
"Parnovsky",
"S L",
""
]
] | We consider an evolution of anisotropic cosmological model on the example of the Bianchi type I homogeneous universe. It is filled by the mixture of matter and dark energy with an arbitrary barotropic equation of state (EoS). The general solution for this case is found and analyzed. A complete list of possible future s... |
2111.14138 | Xiao-Min Zhang | Xiao-Min Zhang, Kai Li, Yi-Fu Guo, Peng-Cheng Chu. He Liu and
Jian-Yang Zhu | Two models unifying warm inflation with dark matter and dark energy | 8 pages, 0 figures | Physical Review D 104, 103513 (2021) | 10.1103/PhysRevD.104.103513 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Two models that unify warm inflation with dark matter and dark energy are
proposed. In the models, a single scalar field is responsible for the early
expansion of the universe through the process of dissipative warm inflation and
then acts as both dark matter and dark energy in subsequent stages. The first
model is b... | [
{
"created": "Sun, 28 Nov 2021 13:35:03 GMT",
"version": "v1"
}
] | 2021-11-30 | [
[
"Zhang",
"Xiao-Min",
""
],
[
"Li",
"Kai",
""
],
[
"Guo",
"Yi-Fu",
""
],
[
"Liu",
"Peng-Cheng Chu. He",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | Two models that unify warm inflation with dark matter and dark energy are proposed. In the models, a single scalar field is responsible for the early expansion of the universe through the process of dissipative warm inflation and then acts as both dark matter and dark energy in subsequent stages. The first model is bas... |
gr-qc/0506032 | Vicente Jos\'e Bol\'os | Vicente J. Bolos | Intrinsic definitions of "relative velocity" in general relativity | 29 pages, 12 figures. New proofs in special relativity and a new open
problem in general relativity (see Remark 5.2). An Appendix has been added,
studying the relative velocities in Schwarzschild, with new figures. Some
spelling erros fixed | Commun.Math.Phys.273:217-236,2007 | 10.1007/s00220-007-0248-9 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given two observers, we define the "relative velocity" of one observer with
respect to the other in four different ways. All four definitions are given
intrinsically, i.e. independently of any coordinate system. Two of them are
given in the framework of spacelike simultaneity and, analogously, the other
two are given... | [
{
"created": "Mon, 6 Jun 2005 08:34:24 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jul 2006 10:43:03 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Nov 2006 11:34:06 GMT",
"version": "v3"
},
{
"created": "Thu, 7 Apr 2011 09:50:17 GMT",
"version": "v4"
},
{
"cre... | 2011-08-05 | [
[
"Bolos",
"Vicente J.",
""
]
] | Given two observers, we define the "relative velocity" of one observer with respect to the other in four different ways. All four definitions are given intrinsically, i.e. independently of any coordinate system. Two of them are given in the framework of spacelike simultaneity and, analogously, the other two are given i... |
1009.5174 | Byeong-soo Park | B. S. Park and D. G. Pak | Quantum Gravity Model in the framework of Weyl-Cartan geometry | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Weyl vector fields which can play an important role in quantum
gravity. The metric obtains its dynamical content after dynamical symmetry
breaking in the phase of the effective Einstein gravity which is induced by
quantum Weyl corrections. In low energy regime with scalar field there is a
relation betwee... | [
{
"created": "Mon, 27 Sep 2010 07:30:20 GMT",
"version": "v1"
}
] | 2010-09-28 | [
[
"Park",
"B. S.",
""
],
[
"Pak",
"D. G.",
""
]
] | We study the Weyl vector fields which can play an important role in quantum gravity. The metric obtains its dynamical content after dynamical symmetry breaking in the phase of the effective Einstein gravity which is induced by quantum Weyl corrections. In low energy regime with scalar field there is a relation between ... |
1601.01257 | Ondrej Kop\'a\v{c}ek | Ond\v{r}ej Kop\'a\v{c}ek and Vladim\'ir Karas | Effective potential of particles in the oblique black hole magnetosphere | 6 pages, 2 figures; to appear in the Proceedings of the "14th Marcel
Grossmann Meeting" (Rome, July 12 - 18, 2015) | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamics of charged matter in the oblique black hole magnetosphere is
investigated. In particular, we adopt a model consisting of a rotating black
hole embedded in the external large-scale magnetic field that is inclined
arbitrarily with respect to the rotation axis. Breaking the axial symmetry
appears to have profou... | [
{
"created": "Sun, 3 Jan 2016 19:19:44 GMT",
"version": "v1"
}
] | 2016-01-07 | [
[
"Kopáček",
"Ondřej",
""
],
[
"Karas",
"Vladimír",
""
]
] | Dynamics of charged matter in the oblique black hole magnetosphere is investigated. In particular, we adopt a model consisting of a rotating black hole embedded in the external large-scale magnetic field that is inclined arbitrarily with respect to the rotation axis. Breaking the axial symmetry appears to have profound... |
gr-qc/9708062 | Jeong-Young Ji | Rong-Gen Cai, Jeong-Young Ji and Kwang-Sup Soh | Action and entropy of black holes in spacetimes with a cosmological
constant | Revtex, 13 pages, no figures | Class.Quant.Grav.15:2783-2793,1998 | 10.1088/0264-9381/15/9/023 | null | gr-qc | null | In the Euclidean path integral approach, we calculate the actions and the
entropies for the Reissner-Nordstr\"om-de Sitter solutions. When the
temperatures of black hole and cosmological horizons are equal, the entropy is
the sum of one-quarter areas of black hole and cosmological horizons; when the
inner and outer b... | [
{
"created": "Tue, 26 Aug 1997 09:28:33 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 1998 11:17:25 GMT",
"version": "v2"
}
] | 2011-04-15 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Ji",
"Jeong-Young",
""
],
[
"Soh",
"Kwang-Sup",
""
]
] | In the Euclidean path integral approach, we calculate the actions and the entropies for the Reissner-Nordstr\"om-de Sitter solutions. When the temperatures of black hole and cosmological horizons are equal, the entropy is the sum of one-quarter areas of black hole and cosmological horizons; when the inner and outer bla... |
2003.02549 | Richard Woodard | D. Glavan (Louvain), S. P. Miao (NCKU), T. Prokopec (Utrecht) and R.
P. Woodard (Florida) | Single Graviton Loop Contribution to the Self-Mass of a Massless,
Conformally Coupled Scalar on de Sitter Background | 26 pages, 1 figure, uses LaTeX 2e. Version 2 revised slightly for
publication | Phys. Rev. D 101, 106016 (2020) | 10.1103/PhysRevD.101.106016 | UFIFT-QG-20-02, CP3-20-10 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use a simplified formalism to re-compute the single graviton loop
contribution to the self-mass of a massless, conformally coupled scalar on de
Sitter background which was originally made by Boran, Kahya and Park [1-3]. Our
result resolves the problem with the flat space correspondence limit that was
pointed out b... | [
{
"created": "Thu, 5 Mar 2020 11:55:41 GMT",
"version": "v1"
},
{
"created": "Sat, 16 May 2020 10:15:09 GMT",
"version": "v2"
}
] | 2020-05-20 | [
[
"Glavan",
"D.",
"",
"Louvain"
],
[
"Miao",
"S. P.",
"",
"NCKU"
],
[
"Prokopec",
"T.",
"",
"Utrecht"
],
[
"Woodard",
"R. P.",
"",
"Florida"
]
] | We use a simplified formalism to re-compute the single graviton loop contribution to the self-mass of a massless, conformally coupled scalar on de Sitter background which was originally made by Boran, Kahya and Park [1-3]. Our result resolves the problem with the flat space correspondence limit that was pointed out by ... |
1904.02168 | Ramon Masachs | Matthew Choptuik, Ramon Masachs, Benson Way | Multi-oscillating Boson Stars | 5 pages, 5 figures | Phys. Rev. Lett. 123, 131101 (2019) | 10.1103/PhysRevLett.123.131101 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that stable boson stars generically fall within an
infinite-parameter family of solutions that oscillate on any number of
non-commensurate frequencies. We numerically construct two-frequency solutions
and explore their parameter space. These solutions merge with the standard
boson star family in the limit ... | [
{
"created": "Wed, 3 Apr 2019 18:00:05 GMT",
"version": "v1"
}
] | 2019-10-02 | [
[
"Choptuik",
"Matthew",
""
],
[
"Masachs",
"Ramon",
""
],
[
"Way",
"Benson",
""
]
] | We propose that stable boson stars generically fall within an infinite-parameter family of solutions that oscillate on any number of non-commensurate frequencies. We numerically construct two-frequency solutions and explore their parameter space. These solutions merge with the standard boson star family in the limit wh... |
2301.12611 | Richard Woodard | S. Katuwal (U. Florida) and R. P. Woodard (U. Florida) | Perturbative Quantum Gravity Induced Scalar Coupling to Electromagnetism | 7 pages, no figures, uses LaTeX2e. Version 2 slightly revised for
publication | Phys. Lett. B842 (2023) 137966 | 10.1016/j.physletb.2023.137966 | UFIFT-QG-23-01 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Physicists working on atom interferometers are interested in scalar couplings
to electromagnetism of dimensions 5 and 6 which might be induced by quantum
gravity. There is a widespread belief that such couplings can only be induced
by conjectured non-perturbative effects, resulting in unknown coupling
strengths. In t... | [
{
"created": "Mon, 30 Jan 2023 02:09:55 GMT",
"version": "v1"
},
{
"created": "Fri, 26 May 2023 12:38:48 GMT",
"version": "v2"
}
] | 2023-05-29 | [
[
"Katuwal",
"S.",
"",
"U. Florida"
],
[
"Woodard",
"R. P.",
"",
"U. Florida"
]
] | Physicists working on atom interferometers are interested in scalar couplings to electromagnetism of dimensions 5 and 6 which might be induced by quantum gravity. There is a widespread belief that such couplings can only be induced by conjectured non-perturbative effects, resulting in unknown coupling strengths. In thi... |
0806.4815 | Dr. Anirudh Pradhan | Anirudh Pradhan and Priya Mathur | Inhomogeneous Perfect Fluid Universe with Electromagnetic Field in Lyra
Geometry | 22 pages, no figure, minor corrections | Fizika B18: 243-264, 2009 | 10.1007/s10509-009-0015-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new class of cylindrically symmetric inhomogeneous cosmological models for
perfect fluid distribution with electromagnetic field is obtained in the
context of Lyra's geometry. We have obtained two types of solutions by
considering the uniform as well as time dependent displacement field. The
source of the magnetic ... | [
{
"created": "Mon, 30 Jun 2008 07:41:08 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Aug 2008 11:52:23 GMT",
"version": "v2"
}
] | 2010-04-15 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Mathur",
"Priya",
""
]
] | A new class of cylindrically symmetric inhomogeneous cosmological models for perfect fluid distribution with electromagnetic field is obtained in the context of Lyra's geometry. We have obtained two types of solutions by considering the uniform as well as time dependent displacement field. The source of the magnetic fi... |
gr-qc/0104046 | Grigori Volovik | G.E. Volovik | Vacuum in quantum liquids and in general relativity | LaTeX, 53 pages, no figures, prepared for Proceedings of the Workshop
`Analog models for general relativity', Rio, October 2000 | Artificial Black Holes, eds. M. Novello, M. Visser and G. Volovik,
World Scientific, 2002, pp. 127--177 | null | null | gr-qc cond-mat hep-ph | null | Quantum liquids, in which an effective Lorentzian metric and thus some kind
of gravity gradually arise in the low-energy corner, are the objects where the
problems related to the quantum vacuum can be investigated in detail. In
particular, they provide the possible solution of the cosmological constant
problem: why t... | [
{
"created": "Sun, 15 Apr 2001 09:37:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Volovik",
"G. E.",
""
]
] | Quantum liquids, in which an effective Lorentzian metric and thus some kind of gravity gradually arise in the low-energy corner, are the objects where the problems related to the quantum vacuum can be investigated in detail. In particular, they provide the possible solution of the cosmological constant problem: why the... |
2208.09488 | William East | William E. East and Frans Pretorius | Binary neutron star mergers in Einstein-scalar-Gauss-Bonnet gravity | 12 pages, 10 figures; revised to match PRD version | Phys. Rev. D 106, 104055 (2022) | 10.1103/PhysRevD.106.104055 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary neutron star mergers, which can lead to less massive black holes
relative to other known astrophysical channels, have the potential to probe
modifications to general relativity that arise at smaller curvature scales
compared to more massive compact object binaries. As a representative example
of this, here we ... | [
{
"created": "Fri, 19 Aug 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Nov 2022 16:25:31 GMT",
"version": "v2"
}
] | 2022-11-29 | [
[
"East",
"William E.",
""
],
[
"Pretorius",
"Frans",
""
]
] | Binary neutron star mergers, which can lead to less massive black holes relative to other known astrophysical channels, have the potential to probe modifications to general relativity that arise at smaller curvature scales compared to more massive compact object binaries. As a representative example of this, here we st... |
0908.2957 | Viktor G. Czinner | Viktor G. Czinner and Antonino Flachi | Curvature corrections and topology change transition in brane-black hole
systems: A perturbative approach | 17 pages, 8 figures; several corrections made, substantial new
material added, the title has been changed | Phys. Rev. D 80, 104017 (2009) | 10.1103/PhysRevD.80.104017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider curvature corrections to static, axisymmetric Dirac-Nambu-Goto
membranes embedded into a spherically symmetric black hole spacetime with
arbitrary number of dimensions. Since the next to leading order corrections in
the effective brane action are quadratic in the brane thickness l, we adopt a
linear pertu... | [
{
"created": "Thu, 20 Aug 2009 16:25:12 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Nov 2009 06:30:12 GMT",
"version": "v2"
}
] | 2009-11-15 | [
[
"Czinner",
"Viktor G.",
""
],
[
"Flachi",
"Antonino",
""
]
] | We consider curvature corrections to static, axisymmetric Dirac-Nambu-Goto membranes embedded into a spherically symmetric black hole spacetime with arbitrary number of dimensions. Since the next to leading order corrections in the effective brane action are quadratic in the brane thickness l, we adopt a linear perturb... |
gr-qc/9901020 | David Hochberg | David Hochberg (LAEFF,Spain) and Matt Visser (Washington University) | General Dynamic Wormholes and Violation of the Null Energy Condition | Invited talk delivered at the Advanced School on Cosmology and
Particle Physics, Peniscola, Spain 22-28 June 1998. 10 pages using Springer
style files | null | null | null | gr-qc | null | Although wormholes can be treated as topological objects in spacetime and
from a global point-of-view, a precise definition of what a wormhole throat is
and where it can be located can be developed and treated entirely in terms of
local geometry. This has the advantage of being free from unnecesary technical
assumpti... | [
{
"created": "Thu, 7 Jan 1999 18:16:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hochberg",
"David",
"",
"LAEFF,Spain"
],
[
"Visser",
"Matt",
"",
"Washington University"
]
] | Although wormholes can be treated as topological objects in spacetime and from a global point-of-view, a precise definition of what a wormhole throat is and where it can be located can be developed and treated entirely in terms of local geometry. This has the advantage of being free from unnecesary technical assumption... |
gr-qc/9502045 | Luanne Neumann | G.F. Chew | Weak Classical-Gravity Source in Standpoint Cosmology | 11 pages, uses math_macros.tex, latex | null | null | LBL-36809 | gr-qc | null | Guided by a linearized approximation to Einstein theory, an interim
prescription for ``weak source of gravity'' - - in ``particle'' energy-momentum
distributed along standpoint light cone - - is formulated for (classical)
standpoint cosmology.
| [
{
"created": "Tue, 28 Feb 1995 22:45:46 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Chew",
"G. F.",
""
]
] | Guided by a linearized approximation to Einstein theory, an interim prescription for ``weak source of gravity'' - - in ``particle'' energy-momentum distributed along standpoint light cone - - is formulated for (classical) standpoint cosmology. |
1004.0679 | Abraham Harte | Samuel E. Gralla, Abraham I. Harte, Robert M. Wald | Bobbing and Kicks in Electromagnetism and Gravity | 22 pages, 1 figure, minor reference changes and fixed typos | Phys.Rev.D81:104012,2010 | 10.1103/PhysRevD.81.104012 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study systems analogous to binary black holes with spin in order to gain
some insight into the origin and nature of "bobbing" motion and "kicks" that
occur in this system. Our basic tool is a general formalism for describing the
motion of extended test bodies in an external electromagnetic field in curved
spacetim... | [
{
"created": "Mon, 5 Apr 2010 18:40:02 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Apr 2010 22:43:34 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Apr 2010 17:52:58 GMT",
"version": "v3"
}
] | 2010-05-25 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Harte",
"Abraham I.",
""
],
[
"Wald",
"Robert M.",
""
]
] | We study systems analogous to binary black holes with spin in order to gain some insight into the origin and nature of "bobbing" motion and "kicks" that occur in this system. Our basic tool is a general formalism for describing the motion of extended test bodies in an external electromagnetic field in curved spacetime ... |
1404.5946 | Franco Albareti | F. D. Albareti, J. A. R. Cembranos and A. L. Maroto | Vacuum energy as dark matter | 13 pages, 6 figures. Version published in PRD | Phys. Rev. D 90, 123509 (2014) | 10.1103/PhysRevD.90.123509 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the vacuum energy of massive quantum fields in an expanding
universe. We define a conserved renormalized energy-momentum tensor by means of
a comoving cutoff regularization. Using exact solutions for de Sitter
space-time, we show that in a certain range of mass and renormalization scales
there is a contri... | [
{
"created": "Wed, 23 Apr 2014 08:44:05 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Dec 2014 21:22:22 GMT",
"version": "v2"
}
] | 2014-12-10 | [
[
"Albareti",
"F. D.",
""
],
[
"Cembranos",
"J. A. R.",
""
],
[
"Maroto",
"A. L.",
""
]
] | We consider the vacuum energy of massive quantum fields in an expanding universe. We define a conserved renormalized energy-momentum tensor by means of a comoving cutoff regularization. Using exact solutions for de Sitter space-time, we show that in a certain range of mass and renormalization scales there is a contribu... |
gr-qc/0512020 | Sergey Kozyrev | Sergey Kozyrev | Exact Vacuum Solutions of Jordan, Brans-Dicke Field Equations | null | null | null | null | gr-qc | null | We present the static spherically symmetric vacuum solutions of the Jordan,
Brans-Dicke field equations. The new solutions are obtained by considering a
polar Gaussian, isothermal and radial hyperbolic metrics.
| [
{
"created": "Sun, 4 Dec 2005 12:28:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kozyrev",
"Sergey",
""
]
] | We present the static spherically symmetric vacuum solutions of the Jordan, Brans-Dicke field equations. The new solutions are obtained by considering a polar Gaussian, isothermal and radial hyperbolic metrics. |
0808.0871 | Anatoliy Prykarpatsky | Nikolai N. Bogolubov Jr., Anatoliy K. Prykarpatsky and Ufuk Taneri | The Vacuum Structure, Special Relativity Theory and Quantum Mechanics
Revisited: A Field Theory-No-Geometry Approach | 17 pages, Available at: \texttt{http://publications.ictp.it}}\hfill
IC/2008/ | Theor.Math.Phys.160:1079-1095,2009; Teor.Mat.Fiz.160:249-269,2009 | 10.1007/s11232-009-0101-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main fundamental principles characterizing the vacuum field structure are
formulated, the modeling of the related vacuum medium and charged point
particle dynamics by means of devised field theoretic tools are analyzed. The
Maxwell electrodynamic theory is revisited and newly derived from the suggested
vacuum fie... | [
{
"created": "Wed, 6 Aug 2008 19:03:59 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Aug 2008 14:51:40 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Aug 2008 16:41:23 GMT",
"version": "v3"
},
{
"created": "Sun, 24 Aug 2008 09:04:39 GMT",
"version": "v4"
},
{
"cre... | 2010-01-26 | [
[
"Bogolubov",
"Nikolai N.",
"Jr."
],
[
"Prykarpatsky",
"Anatoliy K.",
""
],
[
"Taneri",
"Ufuk",
""
]
] | The main fundamental principles characterizing the vacuum field structure are formulated, the modeling of the related vacuum medium and charged point particle dynamics by means of devised field theoretic tools are analyzed. The Maxwell electrodynamic theory is revisited and newly derived from the suggested vacuum field... |
1908.09650 | Alice Waterhouse | Alice Waterhouse | The $\phi^4$ kink on a wormhole spacetime | 20 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The soliton resolution conjecture states that solutions to solitonic
equations with generic initial data should, after some non--linear behaviour,
eventually resolve into a finite number of solitons plus a radiative term. This
conjecture is intimately tied to soliton stability, which has been investigated
for a numbe... | [
{
"created": "Fri, 23 Aug 2019 14:45:18 GMT",
"version": "v1"
}
] | 2019-08-27 | [
[
"Waterhouse",
"Alice",
""
]
] | The soliton resolution conjecture states that solutions to solitonic equations with generic initial data should, after some non--linear behaviour, eventually resolve into a finite number of solitons plus a radiative term. This conjecture is intimately tied to soliton stability, which has been investigated for a number ... |
1612.00861 | Tomislav Prokopec | Lei-Hua Liu and Tomislav Prokopec | Gravitational microlensing in Verlinde's emergent gravity | 19 pages, 2 figures | null | 10.1016/j.physletb.2017.03.061 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose gravitational microlensing as a way of testing the emergent
gravity theory recently proposed by Eric Verlinde~\cite{Verlinde:2016toy}. We
consider two limiting cases: the dark mass of maximally anisotropic pressures
(Case I) and of isotropic pressures (Case II). Our analysis of perihelion
advancement of a ... | [
{
"created": "Thu, 1 Dec 2016 16:48:38 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jan 2017 17:31:02 GMT",
"version": "v2"
}
] | 2017-04-05 | [
[
"Liu",
"Lei-Hua",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | We propose gravitational microlensing as a way of testing the emergent gravity theory recently proposed by Eric Verlinde~\cite{Verlinde:2016toy}. We consider two limiting cases: the dark mass of maximally anisotropic pressures (Case I) and of isotropic pressures (Case II). Our analysis of perihelion advancement of a pl... |
1504.07774 | Mehdi Eshaghi | Mehdi Eshaghi, Nematollah Riazi and Ahmad Kiasatpour | Bulk Viscosity and Particle Creation in the Inflationary Cosmology | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study particle creation in the presence of bulk viscosity of cosmic fluid
in the early universe within the framework of open thermodynamical systems.
Since the first-order theory of non-equilibrium thermodynamics is non-causal
and unstable, we try to solve the bulk viscosity equation of the cosmic fluid
with parti... | [
{
"created": "Wed, 29 Apr 2015 08:55:49 GMT",
"version": "v1"
}
] | 2015-04-30 | [
[
"Eshaghi",
"Mehdi",
""
],
[
"Riazi",
"Nematollah",
""
],
[
"Kiasatpour",
"Ahmad",
""
]
] | We study particle creation in the presence of bulk viscosity of cosmic fluid in the early universe within the framework of open thermodynamical systems. Since the first-order theory of non-equilibrium thermodynamics is non-causal and unstable, we try to solve the bulk viscosity equation of the cosmic fluid with particl... |
2207.11147 | Yongqiang Wang | Chen Liang, Ji-Rong Ren, Shi-Xian Sun, Yong-Qiang Wang | Dirac-boson stars | 26 pages, 12 figures | null | 10.1007/JHEP02(2023)249 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we construct \textit{Dirac-boson stars} (DBSs) model composed
of a scalar field and two Dirac fields. The scalar field and both Dirac fields
are in the ground state. We consider the solution families of the DBSs for the
synchronized frequency $\tilde{\omega}$ and the nonsynchronized frequency
$\tilde{\... | [
{
"created": "Fri, 22 Jul 2022 15:41:06 GMT",
"version": "v1"
}
] | 2023-03-22 | [
[
"Liang",
"Chen",
""
],
[
"Ren",
"Ji-Rong",
""
],
[
"Sun",
"Shi-Xian",
""
],
[
"Wang",
"Yong-Qiang",
""
]
] | In this paper, we construct \textit{Dirac-boson stars} (DBSs) model composed of a scalar field and two Dirac fields. The scalar field and both Dirac fields are in the ground state. We consider the solution families of the DBSs for the synchronized frequency $\tilde{\omega}$ and the nonsynchronized frequency $\tilde{\om... |
gr-qc/0610159 | Philip Tillman Mr. | P. Tillman | Deformation Quantization: From Quantum Mechanics to Quantum Field Theory | null | null | null | null | gr-qc | null | The aim of this paper is to give a basic overview of Deformation Quantization
(DQ) to physicists. A summary is given here of some of the key developments
over the past thirty years in the context of physics, from quantum mechanics to
quantum field theory. Also, we discuss some of the conceptual advantages of DQ
and h... | [
{
"created": "Tue, 31 Oct 2006 17:07:54 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Oct 2006 22:23:16 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Tillman",
"P.",
""
]
] | The aim of this paper is to give a basic overview of Deformation Quantization (DQ) to physicists. A summary is given here of some of the key developments over the past thirty years in the context of physics, from quantum mechanics to quantum field theory. Also, we discuss some of the conceptual advantages of DQ and how... |
1910.03067 | Luis L\'opez | J.C. Olvera and L. A. L\'opez | Scattering and absorption sections of nonlinear electromagnetic black
holes | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The expression of the impact parameter, in the analysis for classical and
semiclassical scattering cross sections for black holes, is obtained with
nonlinear electrodynamics (NLED) while the absorption section is studied with
the sinc approximation in the eikonal limit considering NLED. As an
illustration, we calcula... | [
{
"created": "Mon, 7 Oct 2019 20:16:39 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jan 2020 18:39:16 GMT",
"version": "v2"
}
] | 2020-01-29 | [
[
"Olvera",
"J. C.",
""
],
[
"López",
"L. A.",
""
]
] | The expression of the impact parameter, in the analysis for classical and semiclassical scattering cross sections for black holes, is obtained with nonlinear electrodynamics (NLED) while the absorption section is studied with the sinc approximation in the eikonal limit considering NLED. As an illustration, we calculate... |
gr-qc/0110068 | Viqar Husain | Viqar Husain, Asghar Qadir and Azad A. Siddiqui | Note on flat foliations of spherically symmetric spacetimes | 4 pages, to appear in PRD, reference added, typos corrected | Phys.Rev. D65 (2002) 027501 | 10.1103/PhysRevD.65.027501 | null | gr-qc | null | It is known that spherically symmetric spacetimes admit flat spacelike
foliations. We point out a simple method of seeing this result via the
Hamiltonian constraints of general relativity. The method yields explicit
formulas for the extrinsic curvatures of the slicings.
| [
{
"created": "Sun, 14 Oct 2001 22:46:03 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2001 19:33:02 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Apr 2002 18:38:23 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Husain",
"Viqar",
""
],
[
"Qadir",
"Asghar",
""
],
[
"Siddiqui",
"Azad A.",
""
]
] | It is known that spherically symmetric spacetimes admit flat spacelike foliations. We point out a simple method of seeing this result via the Hamiltonian constraints of general relativity. The method yields explicit formulas for the extrinsic curvatures of the slicings. |
1405.2629 | Roberto Ivan Cabrera Munguia | I. Cabrera-Munguia, Claus L\"ammerzahl, L. A. L\'opez, Alfredo
Mac\'ias | Generalized black diholes | 8 pages, 3 figures, 1 table; accepted in Phys. Rev. D | Phys.Rev.D90:024013,2014 | 10.1103/PhysRevD.90.024013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A 5-parametric exact solution, describing a binary system composed of
identical counter-rotating black holes endowed with opposite electromagnetic
charges, is constructed. The addition of the angular momentum parameter to the
static Emparan-Teo dihole model introduces magnetic charges into this two-body
system. The s... | [
{
"created": "Mon, 12 May 2014 05:21:56 GMT",
"version": "v1"
}
] | 2014-07-10 | [
[
"Cabrera-Munguia",
"I.",
""
],
[
"Lämmerzahl",
"Claus",
""
],
[
"López",
"L. A.",
""
],
[
"Macías",
"Alfredo",
""
]
] | A 5-parametric exact solution, describing a binary system composed of identical counter-rotating black holes endowed with opposite electromagnetic charges, is constructed. The addition of the angular momentum parameter to the static Emparan-Teo dihole model introduces magnetic charges into this two-body system. The sol... |
1203.4258 | Michael P\"urrer | Michael P\"urrer, Sascha Husa, Mark Hannam | An efficient iterative method to reduce eccentricity in
numerical-relativity simulations of compact binary inspiral | 24 pages, 25 figures, pdflatex; v2: minor changes | Phys. Rev. D 85, 124051 (2012) | 10.1103/PhysRevD.85.124051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new iterative method to reduce eccentricity in black-hole-binary
simulations. Given a good first estimate of low-eccentricity starting momenta,
we evolve puncture initial data for ~4 orbits and construct improved initial
parameters by comparing the inspiral with post-Newtonian calculations. Our
method is... | [
{
"created": "Mon, 19 Mar 2012 20:53:27 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2012 14:04:03 GMT",
"version": "v2"
}
] | 2012-07-23 | [
[
"Pürrer",
"Michael",
""
],
[
"Husa",
"Sascha",
""
],
[
"Hannam",
"Mark",
""
]
] | We present a new iterative method to reduce eccentricity in black-hole-binary simulations. Given a good first estimate of low-eccentricity starting momenta, we evolve puncture initial data for ~4 orbits and construct improved initial parameters by comparing the inspiral with post-Newtonian calculations. Our method is t... |
1509.05059 | Edesio Barboza Jr | Rafael C. Nunes, Ed\'esio M. Barboza Jr., Everton M. C. Abreu and
Jorge Ananias Neto | Probing the cosmological viability of non-gaussian statistics | 14 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1503.05874, arXiv:1403.5706 | null | 10.1088/1475-7516/2016/08/051 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the relationship between thermodynamics and gravity we propose, with
the aid of Verlinde's formalism, an alternative interpretation of the dynamical
evolution of the Friedmann-Robertson-Walker Universe. This description takes
into account the entropy and temperature intrinsic to the horizon of the
universe d... | [
{
"created": "Wed, 16 Sep 2015 20:43:12 GMT",
"version": "v1"
},
{
"created": "Wed, 25 May 2016 20:34:05 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Nunes",
"Rafael C.",
""
],
[
"Barboza",
"Edésio M.",
"Jr."
],
[
"Abreu",
"Everton M. C.",
""
],
[
"Neto",
"Jorge Ananias",
""
]
] | Based on the relationship between thermodynamics and gravity we propose, with the aid of Verlinde's formalism, an alternative interpretation of the dynamical evolution of the Friedmann-Robertson-Walker Universe. This description takes into account the entropy and temperature intrinsic to the horizon of the universe due... |
1605.01186 | Parthapratim Pradhan | Parthapratim Pradhan | Thermodynamic Properties of Kehagias-Sfetsos Black Hole \& KS/CFT
Correspondence | Version accepted in EPL | EPL (Europhysics Letters), Volume 120, Number 4, 2018 | 10.1209/0295-5075/120/40006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We speculate on various thermodynamic features of the inner
horizon~(${\mathcal H}^{-}$) and outer horizons~(${\mathcal H}^{+}$) of
Kehagias-Sfetsos~(KS) black hole~(BH) in the background of Ho\v{r}ava Lifshitz
gravity. We compute particularly the \emph{area product, area sum, area minus
and area division} of the BH ... | [
{
"created": "Wed, 4 May 2016 08:55:51 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2016 07:41:39 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Mar 2018 07:49:50 GMT",
"version": "v3"
}
] | 2018-03-07 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We speculate on various thermodynamic features of the inner horizon~(${\mathcal H}^{-}$) and outer horizons~(${\mathcal H}^{+}$) of Kehagias-Sfetsos~(KS) black hole~(BH) in the background of Ho\v{r}ava Lifshitz gravity. We compute particularly the \emph{area product, area sum, area minus and area division} of the BH ho... |
2303.04463 | Erik Jensko | Christian G. Boehmer, Erik Jensko, Ruth Lazkoz | Dynamical systems analysis of $f(Q)$ gravity | 12 pages, 3 figures. Accepted for publication in Universe special
issue Modified Gravity Approaches to the Tensions of $\Lambda$CDM | Universe 9 (2023) 4, 166 | 10.3390/universe9040166 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theories can be used for the description of homogeneous and
isotropic cosmological models through the corresponding field equations. These
can be cast into systems of autonomous differential equations because of their
sole dependence on a well chosen time variable, be it the cosmological time, or
an ... | [
{
"created": "Wed, 8 Mar 2023 09:27:44 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Jensko",
"Erik",
""
],
[
"Lazkoz",
"Ruth",
""
]
] | Modified gravity theories can be used for the description of homogeneous and isotropic cosmological models through the corresponding field equations. These can be cast into systems of autonomous differential equations because of their sole dependence on a well chosen time variable, be it the cosmological time, or an al... |
1411.4828 | Vakhid Gani | Vakhid A. Gani, Alexander E. Dmitriev, Sergey G. Rubin | Deformed compact extra space as dark matter candidate | 12 pages, 5 figures; V2: some changes to match version published in
IJMPD | Int. J. Mod. Phys. D 24, 1545001 (2015) | 10.1142/S0218271815450017 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We elaborate the possibility for a deformed extra space to be considered as
the dark matter candidate. To perform calculations a class of two-dimensional
extra metrics was considered in the framework of the multidimensional gravity.
It was shown that there exists a family of stationary metrics of the extra
space poss... | [
{
"created": "Tue, 18 Nov 2014 12:55:33 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Sep 2015 15:55:36 GMT",
"version": "v2"
}
] | 2016-11-24 | [
[
"Gani",
"Vakhid A.",
""
],
[
"Dmitriev",
"Alexander E.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We elaborate the possibility for a deformed extra space to be considered as the dark matter candidate. To perform calculations a class of two-dimensional extra metrics was considered in the framework of the multidimensional gravity. It was shown that there exists a family of stationary metrics of the extra space posses... |
1904.10023 | Joao Paulo Manoel Pitelli | J. P. M. Pitelli | Comment on "Hadamard states for a scalar field in anti-de Sitter
spacetime with arbitrary boundary conditions" | 3 pages | Phys. Rev. D 99, 108701 (2019) | 10.1103/PhysRevD.99.108701 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper (Phys. Rev. D 94, 125016 (2016)), the authors argued that
the singularities of the two-point functions on the Poincar\'e domain of the
$n$-dimensional anti-de Sitter spacetime ($\text{PAdS}_n$) have the Hadamard
form, regardless of which (Robin) boundary condition is chosen at the conformal
boundary... | [
{
"created": "Mon, 22 Apr 2019 18:41:45 GMT",
"version": "v1"
}
] | 2019-06-05 | [
[
"Pitelli",
"J. P. M.",
""
]
] | In a recent paper (Phys. Rev. D 94, 125016 (2016)), the authors argued that the singularities of the two-point functions on the Poincar\'e domain of the $n$-dimensional anti-de Sitter spacetime ($\text{PAdS}_n$) have the Hadamard form, regardless of which (Robin) boundary condition is chosen at the conformal boundary. ... |
1803.02317 | Kimet Jusufi | Kimet Jusufi | Conical Morris-Thorne Wormholes with a Global Monopole Charge | 8 pages, 4 figures, accepted for publication in Physical Review D | Phys. Rev. D 98, 044016 (2018) | 10.1103/PhysRevD.98.044016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have established an asymptotically conical Morris-Thorne
wormhole solution supported by anisotropic matter fluid and a global monopole
charge in the framework of a $1+3$ dimensional gravity minimally coupled to a
triplet of scalar fields $\phi^a$, resulting from the breaking of a global
$O(3)$ symmet... | [
{
"created": "Tue, 6 Mar 2018 18:08:23 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jul 2018 08:21:02 GMT",
"version": "v2"
}
] | 2018-08-15 | [
[
"Jusufi",
"Kimet",
""
]
] | In this paper we have established an asymptotically conical Morris-Thorne wormhole solution supported by anisotropic matter fluid and a global monopole charge in the framework of a $1+3$ dimensional gravity minimally coupled to a triplet of scalar fields $\phi^a$, resulting from the breaking of a global $O(3)$ symmetry... |
1101.2789 | Roberto Tauraso | Riccardo March, Giovanni Bellettini, Roberto Tauraso, Simone
Dell'Agnello | Constraining spacetime torsion with the Moon and Mercury | null | Phys.Rev.D83:104008,2011 | 10.1103/PhysRevD.83.104008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a search for new gravitational physics phenomena based on
Einstein-Cartan theory of General Relativity including spacetime torsion.
Starting from the parametrized torsion framework of Mao, Tegmark, Guth and
Cabi, we analyze the motion of test bodies in the presence of torsion, and in
particular we compute t... | [
{
"created": "Fri, 14 Jan 2011 12:40:05 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2011 15:43:01 GMT",
"version": "v2"
}
] | 2011-05-13 | [
[
"March",
"Riccardo",
""
],
[
"Bellettini",
"Giovanni",
""
],
[
"Tauraso",
"Roberto",
""
],
[
"Dell'Agnello",
"Simone",
""
]
] | We report a search for new gravitational physics phenomena based on Einstein-Cartan theory of General Relativity including spacetime torsion. Starting from the parametrized torsion framework of Mao, Tegmark, Guth and Cabi, we analyze the motion of test bodies in the presence of torsion, and in particular we compute the... |
gr-qc/9909045 | Tekin Dereli | Tekin Dereli, Yuri N. Obukhov (METU, Ankara) | On the universality of low-energy string model | 11 pages, LATEX, no figures | Class.Quant.Grav. 17 (2000) 219-225 | 10.1088/0264-9381/17/1/315 | null | gr-qc | null | The low-energy (bosonic "heterotic") string theory is interpreted as a
universal limit of the Kaluza-Klein reduction when the dimension of an internal
space goes to infinity. We show that such an approach is helpful in obtaining
classical solutions of the string model. As a particular application, we obtain
new exact... | [
{
"created": "Wed, 15 Sep 1999 09:17:02 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dereli",
"Tekin",
"",
"METU, Ankara"
],
[
"Obukhov",
"Yuri N.",
"",
"METU, Ankara"
]
] | The low-energy (bosonic "heterotic") string theory is interpreted as a universal limit of the Kaluza-Klein reduction when the dimension of an internal space goes to infinity. We show that such an approach is helpful in obtaining classical solutions of the string model. As a particular application, we obtain new exact s... |
1710.06641 | Bo Wang | Bo Wang, Yang Zhang | Second-order cosmological perturbations. I. Produced by scalar-scalar
coupling in synchronous gauge | 65 pages, 0 figures. There are modifications in some terms in
Eq.(B.3) and Eq.(B.7) in this updated version, which are zero for the MD
stage yet nonvanishing for a general stage. We also fix a typo in Eq.(13) in
this updated version | Phys. Rev. D 96, 103522 (2017) | 10.1103/PhysRevD.96.103522 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a systematic study of the 2nd order scalar, vector and tensor
metric perturbations in the Einstein-de Sitter Universe in synchronous
coordinates. For the scalar-scalar coupling between 1st order perturbations, we
decompose the 2nd order perturbed Einstein equation into the respective field
equations of 2nd... | [
{
"created": "Wed, 18 Oct 2017 09:31:05 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Feb 2019 14:54:33 GMT",
"version": "v10"
},
{
"created": "Sun, 22 Oct 2017 04:52:45 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Nov 2017 12:32:25 GMT",
"version": "v3"
},
{
"c... | 2019-02-05 | [
[
"Wang",
"Bo",
""
],
[
"Zhang",
"Yang",
""
]
] | We present a systematic study of the 2nd order scalar, vector and tensor metric perturbations in the Einstein-de Sitter Universe in synchronous coordinates. For the scalar-scalar coupling between 1st order perturbations, we decompose the 2nd order perturbed Einstein equation into the respective field equations of 2nd o... |
1007.1948 | Abdelhafid Bounames | Hemza Azri and A. Bounames | Geometrical Origin of the Cosmological Constant | 15 pages, LaTeX, Published version, General Relativity and
Gravitation (2012), Online First | General Relativity and Gravitation, 44(10), 2547-2561(2012) | 10.1007/s10714-012-1413-9 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the description of the space-time of general relativity as a
diagonal four dimensional submanifold immersed in an eight dimensional
hypercomplex manifold, in torsionless case, leads to a geometrical origin of
the cosmological constant. The cosmological constant appears naturally in the
new field equation... | [
{
"created": "Mon, 12 Jul 2010 17:28:14 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Sep 2010 01:42:53 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Nov 2011 09:00:50 GMT",
"version": "v3"
},
{
"created": "Mon, 6 Aug 2012 13:11:16 GMT",
"version": "v4"
},
{
"cre... | 2016-10-31 | [
[
"Azri",
"Hemza",
""
],
[
"Bounames",
"A.",
""
]
] | We show that the description of the space-time of general relativity as a diagonal four dimensional submanifold immersed in an eight dimensional hypercomplex manifold, in torsionless case, leads to a geometrical origin of the cosmological constant. The cosmological constant appears naturally in the new field equations ... |
gr-qc/9803030 | Anjan Ananda Sen. | A.A.Sen | Non static local string in Brans-Dicke theory | 7 pages LateX format, No figure, submitted to Phys.Rev.D | Pramana 55:369-374,2000 | 10.1007/s12043-000-0066-5 | null | gr-qc | null | A recent investigation shows that a local gauge string with a
phenomenological energy momentum tensor, as prescribed by Vilenkin, is
inconsistent in Brans-Dicke theory. In this work, it has been shown that such a
string is indeed consistent if one introduces time dependences in the metric. A
set of solutions of full ... | [
{
"created": "Mon, 9 Mar 1998 12:50:20 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Sen",
"A. A.",
""
]
] | A recent investigation shows that a local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin, is inconsistent in Brans-Dicke theory. In this work, it has been shown that such a string is indeed consistent if one introduces time dependences in the metric. A set of solutions of full no... |
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