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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1911.07569 | Muhammad Fitrah Alfian Rangga Sakti | Muhammad Fitrah Alfian Rangga Sakti, Hadyan Lutfan Prihadi, Agus
Suroso, and Freddy Permana Zen | Rotating and twisting charged black holes with cloud of strings and
quintessence | conference paper, 2 figures | Journal of Physics: Conference Series 1949 (2021) 012016 | 10.1088/1742-6596/1949/1/012016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a charged spherically symmetric black hole solution with the
existence of a cloud of strings and quintessential matter. Then we apply the
Demianski-Newman-Janis algorithm to generate the rotating and twisting
counterpart. The thermodynamic properties of this black hole solution are
further investigated.
| [
{
"created": "Mon, 18 Nov 2019 12:00:54 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jun 2021 03:17:32 GMT",
"version": "v2"
}
] | 2021-06-24 | [
[
"Sakti",
"Muhammad Fitrah Alfian Rangga",
""
],
[
"Prihadi",
"Hadyan Lutfan",
""
],
[
"Suroso",
"Agus",
""
],
[
"Zen",
"Freddy Permana",
""
]
] | We find a charged spherically symmetric black hole solution with the existence of a cloud of strings and quintessential matter. Then we apply the Demianski-Newman-Janis algorithm to generate the rotating and twisting counterpart. The thermodynamic properties of this black hole solution are further investigated. |
gr-qc/0108036 | Robert D. Klauber | Robert D. Klauber | Frequency and Wavelength of Light for Relativistically Rotating Frames | 13 pages, including 4 tables and references; Revision has added
Section 6 and Appendix B, and corrections to Section 5 | null | null | null | gr-qc | null | Non-time-orthogonal frame analysis is applied to determine the frequency and
wavelength of light as observed i) in a relativistically rotating frame when
emission is from a source fixed in the non-rotating frame, ii) in a
non-rotating frame when emission is from a source fixed in the rotating frame,
and iii) when bot... | [
{
"created": "Sat, 11 Aug 2001 20:06:18 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2002 14:36:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Klauber",
"Robert D.",
""
]
] | Non-time-orthogonal frame analysis is applied to determine the frequency and wavelength of light as observed i) in a relativistically rotating frame when emission is from a source fixed in the non-rotating frame, ii) in a non-rotating frame when emission is from a source fixed in the rotating frame, and iii) when both ... |
2402.04589 | Reem ALfaidi | Reem Alfaidi and Christopher Messenger | Long Short-Term Memory for Early Warning Detection of Gravitational
Waves | 20 pages , 16 figures | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The pre-merger detection of gravitational waves from the early inspiral phase
of compact binary coalescence events would allow the observation of the earlier
stages of the merger in the electromagnetic band. This would significantly
impact multi-messenger astronomy, giving astronomers potential access to rich
new inf... | [
{
"created": "Wed, 7 Feb 2024 05:17:43 GMT",
"version": "v1"
}
] | 2024-02-08 | [
[
"Alfaidi",
"Reem",
""
],
[
"Messenger",
"Christopher",
""
]
] | The pre-merger detection of gravitational waves from the early inspiral phase of compact binary coalescence events would allow the observation of the earlier stages of the merger in the electromagnetic band. This would significantly impact multi-messenger astronomy, giving astronomers potential access to rich new infor... |
2003.00247 | Nan Chen | Nan Chen | Throttling Process of Rotating Bardeen AdS Black Holes | 10 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the author study the throttling process of the Rotating
Bardeen-AdS black hole in a systematic way. In the exended phase space, the
mass of black holes should be viewed as entheply. We derive the Joule-Thomson
coefficient $\mu$ explicitly, and with numerical method, we depict the
inversion curves and i... | [
{
"created": "Sat, 29 Feb 2020 12:14:03 GMT",
"version": "v1"
}
] | 2020-03-03 | [
[
"Chen",
"Nan",
""
]
] | In this paper, the author study the throttling process of the Rotating Bardeen-AdS black hole in a systematic way. In the exended phase space, the mass of black holes should be viewed as entheply. We derive the Joule-Thomson coefficient $\mu$ explicitly, and with numerical method, we depict the inversion curves and ise... |
0710.4438 | Thomas Sotiriou | Thomas P. Sotiriou | Modified Actions for Gravity: Theory and Phenomenology | PhD thesis (Advisors: Stefano Liberati and John C. Miller), 230 pages | null | null | null | gr-qc astro-ph hep-th | null | This thesis is devoted to the study of gravitational theories which can be
seen as modifications or generalisations of General Relativity. The motivation
for considering such theories, stemming from Cosmology, High Energy Physics and
Astrophysics is thoroughly discussed (cosmological problems, dark energy and
dark ma... | [
{
"created": "Wed, 24 Oct 2007 11:52:56 GMT",
"version": "v1"
}
] | 2011-11-10 | [
[
"Sotiriou",
"Thomas P.",
""
]
] | This thesis is devoted to the study of gravitational theories which can be seen as modifications or generalisations of General Relativity. The motivation for considering such theories, stemming from Cosmology, High Energy Physics and Astrophysics is thoroughly discussed (cosmological problems, dark energy and dark matt... |
gr-qc/0112012 | David Mattingly | David Mattingly and Ted Jacobson | Relativistic Gravity With a Dynamical Preferred Frame | 5 pages,Talk presented by D. Mattingly at CPT01; the Second Meeting
on CPT and Lorentz Symmetry, Bloomington, Indiana, 15-18 Aug. 2001 | null | 10.1142/9789812778123_0042 | null | gr-qc astro-ph hep-th | null | While general relativity possesses local Lorentz invariance, both canonical
quantum gravity and string theory suggest that Lorentz invariance may be broken
at high energies. Broken Lorentz invariance has also been postulated as an
explanation for astrophysical anomalies such as the missing GZK cutoff.
Therefore, we s... | [
{
"created": "Fri, 7 Dec 2001 23:30:11 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Mattingly",
"David",
""
],
[
"Jacobson",
"Ted",
""
]
] | While general relativity possesses local Lorentz invariance, both canonical quantum gravity and string theory suggest that Lorentz invariance may be broken at high energies. Broken Lorentz invariance has also been postulated as an explanation for astrophysical anomalies such as the missing GZK cutoff. Therefore, we see... |
1904.07133 | Aaron Held | Aaron Held, Roman Gold and Astrid Eichhorn | Asymptotic safety casts its shadow | Identical with version published in JCAP | null | 10.1088/1475-7516/2019/06/029 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We set out to bridge the gap between regular black-hole spacetimes and
observations of a black-hole shadow by the Event Horizon Telescope. We explore
modifications of spinning and non-spinning black-hole spacetimes inspired by
asymptotically safe quantum gravity which features a scale dependence of the
Newton couplin... | [
{
"created": "Mon, 15 Apr 2019 15:37:35 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 03:51:09 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Held",
"Aaron",
""
],
[
"Gold",
"Roman",
""
],
[
"Eichhorn",
"Astrid",
""
]
] | We set out to bridge the gap between regular black-hole spacetimes and observations of a black-hole shadow by the Event Horizon Telescope. We explore modifications of spinning and non-spinning black-hole spacetimes inspired by asymptotically safe quantum gravity which features a scale dependence of the Newton coupling.... |
1905.09461 | Hong Guo | Hong Guo, Hang Liu, Xiao-Mei Kuang, Bin Wang | Strong Cosmic Censorship in Charged de Sitter spacetime with Scalar
Field Non-minimally Coupled to Curvature | 14 pages, 4 figures, 5 tables | null | 10.1140/epjc/s10052-019-7416-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the stability and the strong cosmic censorship in the
Reissner-Nordstrom-de Sitter (RN-dS) black hole by investigating the evolution
of a scalar field non-minimally coupled to the curvature. We find that when the
coupling parameter is negative, the RN-dS black hole experiences instability.
The instability ... | [
{
"created": "Thu, 23 May 2019 04:56:24 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Guo",
"Hong",
""
],
[
"Liu",
"Hang",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wang",
"Bin",
""
]
] | We examine the stability and the strong cosmic censorship in the Reissner-Nordstrom-de Sitter (RN-dS) black hole by investigating the evolution of a scalar field non-minimally coupled to the curvature. We find that when the coupling parameter is negative, the RN-dS black hole experiences instability. The instability di... |
1802.03020 | Felicity Eperon | Felicity C. Eperon, Harvey S. Reall and Jan J. Sbierski | Predictability of subluminal and superluminal wave equations | null | null | 10.1007/s00220-019-03428-1 | null | gr-qc hep-th math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is sometimes claimed that Lorentz invariant wave equations which allow
superluminal propagation exhibit worse predictability than subluminal
equations. To investigate this, we study the Born-Infeld scalar in two
spacetime dimensions. This equation can be formulated in either a subluminal or
a superluminal form. Su... | [
{
"created": "Thu, 8 Feb 2018 19:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2019 16:57:29 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Eperon",
"Felicity C.",
""
],
[
"Reall",
"Harvey S.",
""
],
[
"Sbierski",
"Jan J.",
""
]
] | It is sometimes claimed that Lorentz invariant wave equations which allow superluminal propagation exhibit worse predictability than subluminal equations. To investigate this, we study the Born-Infeld scalar in two spacetime dimensions. This equation can be formulated in either a subluminal or a superluminal form. Surp... |
gr-qc/9806111 | Richard Easther | R. Brandenberger, Richard Easther and J. Maia | Nonsingular Dilaton Cosmology | 7 pages, uses RevTeX and psfrag, 2 figures (minor typos fixed) | JHEP 9808 (1998) 007 | 10.1088/1126-6708/1998/08/007 | BROWN-HET-1128 | gr-qc astro-ph hep-th | null | We study spatially homogeneous and isotropic solutions to the equations of
motion derived from dilaton gravity, in the presence of a special combination
of higher derivative terms in the gravitational action. All solutions are
nonsingular. For initial conditions resembling those in the pre-big-bang
scenario, there ar... | [
{
"created": "Sun, 28 Jun 1998 16:55:58 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jul 1998 19:33:06 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Brandenberger",
"R.",
""
],
[
"Easther",
"Richard",
""
],
[
"Maia",
"J.",
""
]
] | We study spatially homogeneous and isotropic solutions to the equations of motion derived from dilaton gravity, in the presence of a special combination of higher derivative terms in the gravitational action. All solutions are nonsingular. For initial conditions resembling those in the pre-big-bang scenario, there are ... |
2208.06043 | J. Brian Pitts | J. Brian Pitts | Peter Bergmann on Observables in Hamiltonian General Relativity: A
Historical-Critical Investigation | null | Studies in History and Philosophy of Science 95 (2022) pp. 1-27 | 10.1016/j.shpsa.2022.06.012. | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of observables and their supposed lack of change has been
significant in Hamiltonian quantum gravity since the 1950s. This paper
considers the unrecognized variety of ideas about observables in the thought of
Peter Bergmann, who invented observables. Whereas initially he required a
constrained Hamiltonian... | [
{
"created": "Thu, 11 Aug 2022 21:24:55 GMT",
"version": "v1"
}
] | 2022-08-15 | [
[
"Pitts",
"J. Brian",
""
]
] | The problem of observables and their supposed lack of change has been significant in Hamiltonian quantum gravity since the 1950s. This paper considers the unrecognized variety of ideas about observables in the thought of Peter Bergmann, who invented observables. Whereas initially he required a constrained Hamiltonian f... |
1612.01126 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Inflationary $\alpha$-attractors from $F(R)$ Gravity | PRD accepted | null | 10.1103/PhysRevD.94.124026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study some classes of $\alpha$-attractors models in the
Jordan frame and we find the corresponding $F(R)$ gravity theory. We study
analytically the problem at leading order and we investigate whether the
attractor picture persists in the $F(R)$ gravity equivalent theory. As we show,
if the slow-roll ... | [
{
"created": "Sun, 4 Dec 2016 14:48:26 GMT",
"version": "v1"
}
] | 2017-01-04 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this paper we study some classes of $\alpha$-attractors models in the Jordan frame and we find the corresponding $F(R)$ gravity theory. We study analytically the problem at leading order and we investigate whether the attractor picture persists in the $F(R)$ gravity equivalent theory. As we show, if the slow-roll co... |
2203.08740 | Roldao da Rocha | R. T. Cavalcanti, R. C. de Paiva, R. da Rocha | Echoes of the gravitational decoupling: scalar perturbations and
quasinormal modes of hairy black holes | 15 pages, 6 figures | Eur. Phys. J. Plus 137 (2022) 1185 | 10.1140/epjp/s13360-022-03407-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behavior of hairy black hole solutions, obtained by the gravitational
decoupling (GD) method, is investigated under scalar perturbations. The
quasinormal mode frequencies of such solutions are regulated by GD hair. The
numerically generated wave solutions are derived for a range of values for the
GD hairy black h... | [
{
"created": "Wed, 16 Mar 2022 16:39:36 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2022 21:39:43 GMT",
"version": "v2"
}
] | 2022-10-31 | [
[
"Cavalcanti",
"R. T.",
""
],
[
"de Paiva",
"R. C.",
""
],
[
"da Rocha",
"R.",
""
]
] | The behavior of hairy black hole solutions, obtained by the gravitational decoupling (GD) method, is investigated under scalar perturbations. The quasinormal mode frequencies of such solutions are regulated by GD hair. The numerically generated wave solutions are derived for a range of values for the GD hairy black hol... |
1010.2654 | Janusz Garecki Prof | Janusz Garecki | Teleparallel equivalent of general relativity: a critical review | Slightly amended lecture delivered at "Hypercomplex Seminar 2010"
dedicated to Professor Roman S. Ingarden on the occasion of the Jubilee of
His 90th birthday, 17-24 July 2010, at B\c{e}dlewo, Poland. Submitted to the
Proceedings of the Conference | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After reminder some facts concerning general relativity ({\bf GR}) we pass to
teleparallel gravity. We are confining the special model of the teleparallel
gravity, which is popular recently, called {\it the teleparallel equivalent of
general relativity} ({\bf TEGR}). We are finishing with conclusion and some
general ... | [
{
"created": "Wed, 13 Oct 2010 13:13:17 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Oct 2010 12:57:44 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Nov 2010 13:45:33 GMT",
"version": "v3"
}
] | 2010-11-22 | [
[
"Garecki",
"Janusz",
""
]
] | After reminder some facts concerning general relativity ({\bf GR}) we pass to teleparallel gravity. We are confining the special model of the teleparallel gravity, which is popular recently, called {\it the teleparallel equivalent of general relativity} ({\bf TEGR}). We are finishing with conclusion and some general re... |
1705.09968 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | A note on the cosmological constant in f(R) gravity | 7 pages, 1 figure | J. Appl. Math. and Phys. (JAMP), vol. 5, pp. 933-938, 2017 | 10.4236/jamp.2017.54082 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The starting point in this note is $f(R)$ modified gravity in a cosmological
setting. We assume a spatially flat Universe to describe late-time cosmology
and the perfect-fluid equation of state $p=\omega\rho$ to model the
hypothesized dark energy. Given that on a cosmological scale, $f(R)$ modified
gravity must remai... | [
{
"created": "Sun, 28 May 2017 17:46:04 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jun 2017 17:52:15 GMT",
"version": "v2"
}
] | 2017-06-13 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | The starting point in this note is $f(R)$ modified gravity in a cosmological setting. We assume a spatially flat Universe to describe late-time cosmology and the perfect-fluid equation of state $p=\omega\rho$ to model the hypothesized dark energy. Given that on a cosmological scale, $f(R)$ modified gravity must remain ... |
2204.13133 | Erickson Tjoa | Erickson Tjoa and Finnian Gray | Modest holography and bulk reconstruction in asymptotically flat
spacetimes | 19+5 pages, 5 figures; RevTeX4-2; v2: fixed typo and added some minor
clarifications; v3: fixed to match published version | Phys. Rev. D 106, 025021 (2022) | 10.1103/PhysRevD.106.025021 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a "modest" holographic reconstruction of the bulk
geometry in asymptotically flat spacetime using the two-point correlators of
boundary quantum field theory (QFT) in asymptotically flat spacetime. The
boundary QFT lives on the null boundary of the spacetime, namely null infinity
and/or the Kil... | [
{
"created": "Wed, 27 Apr 2022 18:00:56 GMT",
"version": "v1"
},
{
"created": "Mon, 30 May 2022 12:42:59 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Aug 2022 18:11:24 GMT",
"version": "v3"
}
] | 2022-08-04 | [
[
"Tjoa",
"Erickson",
""
],
[
"Gray",
"Finnian",
""
]
] | In this work we present a "modest" holographic reconstruction of the bulk geometry in asymptotically flat spacetime using the two-point correlators of boundary quantum field theory (QFT) in asymptotically flat spacetime. The boundary QFT lives on the null boundary of the spacetime, namely null infinity and/or the Killi... |
gr-qc/0311023 | Graham Woan | B. Allen, G. Woan (for the LIGO Scientific Collaboration) | Upper limits on the strength of periodic gravitational waves from PSR
J1939+2134 | 7 pages, 1 figure, to appear in the Proceedings of the 5th Edoardo
Amaldi Conference on Gravitational Waves, Tirrenia, Pisa, Italy, 6-11 July
2003 | Class.Quant.Grav.21:S671-S676,2004 | 10.1088/0264-9381/21/5/042 | null | gr-qc | null | The first science run of the LIGO and GEO gravitational wave detectors
presented the opportunity to test methods of searching for gravitational waves
from known pulsars. Here we present new direct upper limits on the strength of
waves from the pulsar PSR J1939+2134 using two independent analysis methods,
one in the f... | [
{
"created": "Fri, 7 Nov 2003 13:56:04 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"Allen",
"B.",
"",
"for the LIGO Scientific Collaboration"
],
[
"Woan",
"G.",
"",
"for the LIGO Scientific Collaboration"
]
] | The first science run of the LIGO and GEO gravitational wave detectors presented the opportunity to test methods of searching for gravitational waves from known pulsars. Here we present new direct upper limits on the strength of waves from the pulsar PSR J1939+2134 using two independent analysis methods, one in the fre... |
gr-qc/9811084 | Yakov Itin | Yakov Itin | A class of quasi-linear equations in coframe gravity | null | Gen.Rel.Grav. 31 (1999) 1891-1911 | 10.1023/A:1026738906177 | null | gr-qc math-ph math.MP | null | We have shown recently that the gravity field phenomena can be described by a
traceless part of the wave-type field equation. This is an essentially
non-Einsteinian gravity model. It has an exact spherically-symmetric static
solution, that yields to the Yilmaz-Rosen metric. This metric is very close to
the Schwarzchi... | [
{
"created": "Tue, 24 Nov 1998 17:45:06 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 1999 10:10:33 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Itin",
"Yakov",
""
]
] | We have shown recently that the gravity field phenomena can be described by a traceless part of the wave-type field equation. This is an essentially non-Einsteinian gravity model. It has an exact spherically-symmetric static solution, that yields to the Yilmaz-Rosen metric. This metric is very close to the Schwarzchild... |
2005.03968 | Orfeu Bertolami | Orfeu Bertolami, Cl\'audio Gomes | A note on the comments of arXiv:2003.10154 [gr-qc] to our paper
Nonminimally Coupled Boltzmann Equation I: Foundations (arXiv:2002.08184
[gr-qc]) | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note we comment on remarks about our recent effort to understand the
specificities of the Boltzmann equation in the context of the alternative
theories of gravity with non-minimal coupling between curvature and matter.
| [
{
"created": "Fri, 8 May 2020 11:41:17 GMT",
"version": "v1"
}
] | 2020-05-11 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Gomes",
"Cláudio",
""
]
] | In this note we comment on remarks about our recent effort to understand the specificities of the Boltzmann equation in the context of the alternative theories of gravity with non-minimal coupling between curvature and matter. |
gr-qc/9412056 | Joan Masso | Peter Anninos, David Bernstein, Steven Brandt, Joan Masso, Edward
Seidel, Larry Smarr, Wai-Mo Suen, Paul Walker | Event Horizons of Numerical Black Holes | 3 pages, uuencoded gziped ps file including 1 Fig. Also available at
http://jean-luc.ncsa.uiuc.edu/Papers/ To appear in the MG7 proceedings | null | null | null | gr-qc | null | We have developed a powerful and efficient method for locating the event
horizon of a black hole spacetime, making possible the study of the dynamics of
event horizons in numerical relativity. We describe the method and apply it to
a colliding black hole spacetime.
| [
{
"created": "Wed, 21 Dec 1994 01:07:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anninos",
"Peter",
""
],
[
"Bernstein",
"David",
""
],
[
"Brandt",
"Steven",
""
],
[
"Masso",
"Joan",
""
],
[
"Seidel",
"Edward",
""
],
[
"Smarr",
"Larry",
""
],
[
"Suen",
"Wai-Mo",
""
],
[
"Walker... | We have developed a powerful and efficient method for locating the event horizon of a black hole spacetime, making possible the study of the dynamics of event horizons in numerical relativity. We describe the method and apply it to a colliding black hole spacetime. |
gr-qc/0609128 | T. R. Mongan | T. R. Mongan | Holography and non-locality in a closed vacuum-dominated universe | 4 pages, no figures, to be published in Int. J. Theor. Phys,
references corrected | Int.J.Theor.Phys.46:399-404,2007 | 10.1007/s10773-006-9241-x | null | gr-qc hep-th quant-ph | null | A closed vacuum-dominated Friedmann universe is asymptotic to a de Sitter
space with a cosmological event horizon for any observer. The holographic
principle says the area of the horizon in Planck units determines the number of
bits of information about the universe that will ever be available to any
observer. The wa... | [
{
"created": "Thu, 28 Sep 2006 00:02:02 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Oct 2006 14:54:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mongan",
"T. R.",
""
]
] | A closed vacuum-dominated Friedmann universe is asymptotic to a de Sitter space with a cosmological event horizon for any observer. The holographic principle says the area of the horizon in Planck units determines the number of bits of information about the universe that will ever be available to any observer. The wave... |
0812.4180 | Alexis Larranaga | Alexis Larranaga | Thermodynamics of the (2+1)-dimensional Black Hole with non linear
Electrodynamics and without Cosmological Constant from the Generalized
Uncertainly Principle | 5 pages | Bulg.J.Phys.37:10-15,2010 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the thermodynamical properties of the
(2+1)dimensional black hole with a non-linear electrodynamics and without
cosmological constant using the Generalized Uncertainty Principle (GUP). This
approach shows that there is a maximum temperature for the black hole depending
only on the electric cha... | [
{
"created": "Mon, 22 Dec 2008 13:36:09 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jan 2009 16:57:03 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Larranaga",
"Alexis",
""
]
] | In this paper, we study the thermodynamical properties of the (2+1)dimensional black hole with a non-linear electrodynamics and without cosmological constant using the Generalized Uncertainty Principle (GUP). This approach shows that there is a maximum temperature for the black hole depending only on the electric charg... |
gr-qc/0604025 | Norbert Van den Bergh | Lode Wylleman, Norbert Van den Bergh | Complete classification of purely magnetic, non-rotating and
non-accelerating perfect fluids | 12 pages; introduction partly rewritten, notation made more clear,
table of results added | Phys.Rev.D74:084001,2006 | 10.1103/PhysRevD.74.084001 | null | gr-qc | null | Recently the class of purely magnetic non-rotating dust spacetimes has been
shown to be empty (Wylleman, Class. Quant. Grav. 23, 2727). It turns out that
purely magnetic rotating dust models are subject to severe integrability
conditions as well. One of the consequences of the present paper is that also
rotating dust... | [
{
"created": "Thu, 6 Apr 2006 10:07:36 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jun 2006 12:53:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Wylleman",
"Lode",
""
],
[
"Bergh",
"Norbert Van den",
""
]
] | Recently the class of purely magnetic non-rotating dust spacetimes has been shown to be empty (Wylleman, Class. Quant. Grav. 23, 2727). It turns out that purely magnetic rotating dust models are subject to severe integrability conditions as well. One of the consequences of the present paper is that also rotating dust c... |
gr-qc/0302026 | Garth Antony Barber | Garth A Barber | Resolving the Degeneracy: Experimental tests of the New Self Creation
Cosmology and a heterodox prediction for Gravity Probe B | LaTex, 15 pages. Correction of the prediction of the GP-B geodetic
measurement to 4.4096 arcsec/yr | Astrophys.Space Sci. 305 (2006) 169-176 | 10.1007/s10509-006-9056-5 | null | gr-qc astro-ph hep-th | null | The new theory of Self Creation Cosmology has been shown to yield a
concordant cosmological solution that does not require inflation, exotic
non-baryonic Dark matter or Dark Energy to fit observational constraints. In
vacuo there is a conformal equivalence between this theory and canonical
General Relativity and as a... | [
{
"created": "Mon, 10 Feb 2003 00:09:09 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Feb 2003 18:54:07 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Apr 2003 17:29:59 GMT",
"version": "v3"
},
{
"created": "Thu, 15 Dec 2005 20:18:40 GMT",
"version": "v4"
},
{
"c... | 2007-05-23 | [
[
"Barber",
"Garth A",
""
]
] | The new theory of Self Creation Cosmology has been shown to yield a concordant cosmological solution that does not require inflation, exotic non-baryonic Dark matter or Dark Energy to fit observational constraints. In vacuo there is a conformal equivalence between this theory and canonical General Relativity and as a c... |
1308.2683 | Richard T. Hammond | Richard T Hammond | Negative mass | 7 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some physical aspects of negative mass are examined. Several unusual
properties, such as the ability of negative mass to penetrate any armor, are
analyzed. Other surprising effects include the bizarre system of negative mass
chasing positive pass, naked singularities and the violation of cosmic
censorship, wormholes,... | [
{
"created": "Tue, 6 Aug 2013 18:39:01 GMT",
"version": "v1"
}
] | 2013-08-14 | [
[
"Hammond",
"Richard T",
""
]
] | Some physical aspects of negative mass are examined. Several unusual properties, such as the ability of negative mass to penetrate any armor, are analyzed. Other surprising effects include the bizarre system of negative mass chasing positive pass, naked singularities and the violation of cosmic censorship, wormholes, a... |
2301.06840 | Qing-Guo Huang | Rong-Zhen Guo, Chen Yuan, and Qing-Guo Huang | On the Interaction between Ultralight Bosons and Quantum-Corrected Black
Holes | 20 pages, 6 figures | null | 10.1088/1475-7516/2023/04/069 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Both ultralight dark matter and exploring the quantum nature of black holes
are all topics of great interest in gravitational wave astronomy at present.
The superradiant instability allows an exotic compact object (ECO) to be
surrounded by an ultralight boson cloud, which leads to the emission of
gravitational waves ... | [
{
"created": "Tue, 17 Jan 2023 12:36:41 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"Guo",
"Rong-Zhen",
""
],
[
"Yuan",
"Chen",
""
],
[
"Huang",
"Qing-Guo",
""
]
] | Both ultralight dark matter and exploring the quantum nature of black holes are all topics of great interest in gravitational wave astronomy at present. The superradiant instability allows an exotic compact object (ECO) to be surrounded by an ultralight boson cloud, which leads to the emission of gravitational waves an... |
0801.2008 | Tiberiu Harko | C. S. J. Pun, L. \'A. Gergely, M. K. Mak, Z. Kov\'acs, G. M. Szab\'o,
T. Harko | Viscous dissipative Chaplygin gas dominated homogenous and isotropic
cosmological models | 14 pages, 9 figures, to appear in PRD | Phys.Rev.D77:063528,2008 | 10.1103/PhysRevD.77.063528 | null | gr-qc astro-ph hep-th | null | The generalized Chaplygin gas, which interpolates between a high density
relativistic era and a non-relativistic matter phase, is a popular dark energy
candidate. We consider a generalization of the Chaplygin gas model, by assuming
the presence of a bulk viscous type dissipative term in the effective
thermodynamic pr... | [
{
"created": "Mon, 14 Jan 2008 03:52:51 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pun",
"C. S. J.",
""
],
[
"Gergely",
"L. Á.",
""
],
[
"Mak",
"M. K.",
""
],
[
"Kovács",
"Z.",
""
],
[
"Szabó",
"G. M.",
""
],
[
"Harko",
"T.",
""
]
] | The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular dark energy candidate. We consider a generalization of the Chaplygin gas model, by assuming the presence of a bulk viscous type dissipative term in the effective thermodynamic pres... |
1503.01470 | Quentin Baghi | Q. Baghi, G. M\'etris, J. Berg\'e, B. Christophe, P. Touboul, M.
Rodrigues | Regression analysis with missing data and unknown colored noise:
application to the MICROSCOPE space mission | 12 pages, 4 figures, to be published in Phys. Rev. D | null | 10.1103/PhysRevD.91.062003 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of physical measurements often copes with highly correlated
noises and interruptions caused by outliers, saturation events or transmission
losses. We assess the impact of missing data on the performance of linear
regression analysis involving the fit of modeled or measured time series. We
show that data ... | [
{
"created": "Wed, 4 Mar 2015 21:01:06 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Baghi",
"Q.",
""
],
[
"Métris",
"G.",
""
],
[
"Bergé",
"J.",
""
],
[
"Christophe",
"B.",
""
],
[
"Touboul",
"P.",
""
],
[
"Rodrigues",
"M.",
""
]
] | The analysis of physical measurements often copes with highly correlated noises and interruptions caused by outliers, saturation events or transmission losses. We assess the impact of missing data on the performance of linear regression analysis involving the fit of modeled or measured time series. We show that data ga... |
2008.01262 | V Gayathri | V. Gayathri, Dixeena Lopez, R. S. Pranjal, Ik Siong Heng, Archana Pai,
Chris Messenger | Enhancing the sensitivity of transient gravitational wave searches with
Gaussian Mixture Models | 9 pages, 4 figures | Phys. Rev. D 102, 104023 (2020) | 10.1103/PhysRevD.102.104023 | LIGO Document P2000065 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Identifying the presence of a gravitational wave transient buried in
non-stationary, non-Gaussian noise which can often contain spurious noise
transients (glitches) is a very challenging task. For a given data set,
transient gravitational wave searches produce a corresponding list of triggers
that indicate the possib... | [
{
"created": "Tue, 4 Aug 2020 00:59:57 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Gayathri",
"V.",
""
],
[
"Lopez",
"Dixeena",
""
],
[
"Pranjal",
"R. S.",
""
],
[
"Heng",
"Ik Siong",
""
],
[
"Pai",
"Archana",
""
],
[
"Messenger",
"Chris",
""
]
] | Identifying the presence of a gravitational wave transient buried in non-stationary, non-Gaussian noise which can often contain spurious noise transients (glitches) is a very challenging task. For a given data set, transient gravitational wave searches produce a corresponding list of triggers that indicate the possible... |
gr-qc/0403008 | Yuri Pavlov | Yu. V. Pavlov | The n-wave procedure and dimensional regularization for the scalar field
in a homogeneous isotropic space | LATEX, 20 pages, no figure | Theor.Math.Phys. 138 (2004) 383-396; Teor.Mat.Fiz. 138 (2004)
401-421 | 10.1023/B:TAMP.0000018454.29920.ab | null | gr-qc | null | We obtain expressions for the vacuum expectations of the energy-momentum
tensor of the scalar field with an arbitrary coupling to the curvature in an
N-dimensional homogeneous isotropic space for the vacuum determined by
diagonalization of the Hamiltonian. We generalize the n-wave procedure to
N-dimensional homogeneo... | [
{
"created": "Mon, 1 Mar 2004 17:00:45 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Pavlov",
"Yu. V.",
""
]
] | We obtain expressions for the vacuum expectations of the energy-momentum tensor of the scalar field with an arbitrary coupling to the curvature in an N-dimensional homogeneous isotropic space for the vacuum determined by diagonalization of the Hamiltonian. We generalize the n-wave procedure to N-dimensional homogeneous... |
1408.5976 | Anzhong Wang | Kai Lin, Elcio Abdalla, Rong-Gen Cai, and Anzhong Wang | Universal horizons and black holes in gravitational theories with broken
Lorentz symmetry | revtex4, 19 figures. Version to appear in the special issue, Modified
Gravity and Effects of Lorentz Violation, Inter. J. Mod. Phys. D | Inter. J. Mod. Phys. D23, (2014) 1443004 | 10.1142/S0218271814430044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we first show that the definition of the universal horizons
studied recently in the khrononmetric theory of gravity can be
straightforwardly generalized to other theories that violate the Lorentz
symmetry, by simply considering the khronon as a probe field and playing the
same role as a Killing vector ... | [
{
"created": "Tue, 26 Aug 2014 02:06:47 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Sep 2014 15:41:33 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Dec 2014 19:09:45 GMT",
"version": "v3"
}
] | 2015-01-05 | [
[
"Lin",
"Kai",
""
],
[
"Abdalla",
"Elcio",
""
],
[
"Cai",
"Rong-Gen",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper, we first show that the definition of the universal horizons studied recently in the khrononmetric theory of gravity can be straightforwardly generalized to other theories that violate the Lorentz symmetry, by simply considering the khronon as a probe field and playing the same role as a Killing vector fi... |
gr-qc/0409111 | Slava G. Turyshev | Slava G. Turyshev, Michael Shao, Kenneth L. Nordtvedt | Mission Design for the Laser Astrometric Test Of Relativity | 14 pages, 2 figures, invited talk given at ``35th COSPAR Scientific
Assebly,'' July 18-24, 2004, Paris, France | Adv.SpaceRes.39:297-304,2007 | 10.1016/j.asr.2005.07.003 | null | gr-qc astro-ph physics.space-ph | null | This paper focuses on the mission design for the Laser Astrometric Test Of
Relativity (LATOR). This mission uses laser interferometry between two
micro-spacecraft whose lines of sight pass close by the Sun to accurately
measure deflection of light in the solar gravity. The key element of the
experimental design is a ... | [
{
"created": "Wed, 29 Sep 2004 05:24:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Shao",
"Michael",
""
],
[
"Nordtvedt",
"Kenneth L.",
""
]
] | This paper focuses on the mission design for the Laser Astrometric Test Of Relativity (LATOR). This mission uses laser interferometry between two micro-spacecraft whose lines of sight pass close by the Sun to accurately measure deflection of light in the solar gravity. The key element of the experimental design is a re... |
2109.14991 | Hemwati Nandan | Shubham Kala, Hemwati Nandan, Prateek Sharma and Maye Elmardi | Geodesics and Bending of Light around a BTZ Black Hole Surrounded by
Quintessential Matter | Accepted in Modern Physics Letters A | null | 10.1142/S0217732321502242 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various observations from cosmic microwave background radiation (CMBR), type
Ia supernova and baryon acoustic oscillations (BAO) are strongly suggestive of
an accelerated expansion of the universe which can be explained by the presence
of mysterious energy known as dark energy. The quintessential matter coupled
with ... | [
{
"created": "Thu, 30 Sep 2021 10:41:39 GMT",
"version": "v1"
}
] | 2021-11-03 | [
[
"Kala",
"Shubham",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Sharma",
"Prateek",
""
],
[
"Elmardi",
"Maye",
""
]
] | Various observations from cosmic microwave background radiation (CMBR), type Ia supernova and baryon acoustic oscillations (BAO) are strongly suggestive of an accelerated expansion of the universe which can be explained by the presence of mysterious energy known as dark energy. The quintessential matter coupled with gr... |
gr-qc/0106045 | Iver. H. Brevik | I. Brevik and G. Halnes | Light Rays at Optical Black Holes in Moving Media | 30 pages, LaTeX, 4 ps figures. Expanded discussion especially in
section 6; 5 new references. Version to appear in Phys. Rev. D | Phys.Rev.D65:024005,2002 | 10.1103/PhysRevD.65.024005 | null | gr-qc | null | Light experiences a non-uniformly moving medium as an effective gravitational
field, endowed with an effective metric tensor $\tilde{g}^{\mu \nu}=\eta^{\mu
\nu}+(n^2-1)u^\mu u^\nu$, $n$ being the refractive index and $u^\mu$ the
four-velocity of the medium. Leonhardt and Piwnicki [Phys. Rev. A {\bf 60},
4301 (1999)] ... | [
{
"created": "Thu, 14 Jun 2001 15:00:09 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jun 2001 14:52:40 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Oct 2001 11:01:21 GMT",
"version": "v3"
}
] | 2009-01-14 | [
[
"Brevik",
"I.",
""
],
[
"Halnes",
"G.",
""
]
] | Light experiences a non-uniformly moving medium as an effective gravitational field, endowed with an effective metric tensor $\tilde{g}^{\mu \nu}=\eta^{\mu \nu}+(n^2-1)u^\mu u^\nu$, $n$ being the refractive index and $u^\mu$ the four-velocity of the medium. Leonhardt and Piwnicki [Phys. Rev. A {\bf 60}, 4301 (1999)] ar... |
gr-qc/0503089 | Francesca Federici | F. Federici, C. Cherubini, S. Succi, and M. P. Tosi | Superradiance from BEC vortices: a numerical study | 4 pages, 4 figures | null | 10.1103/PhysRevA.73.033604 | null | gr-qc | null | The scattering of sound wave perturbations from vortex excitations of
Bose-Einstein condensates(BEC) is investigated by numerical integration of the
associated Klein-Gordon equation. It is found that, at sufficiently high
angular speeds, sound wave-packets can extract a sizeable fraction of the
vortex energy through ... | [
{
"created": "Mon, 21 Mar 2005 09:32:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Federici",
"F.",
""
],
[
"Cherubini",
"C.",
""
],
[
"Succi",
"S.",
""
],
[
"Tosi",
"M. P.",
""
]
] | The scattering of sound wave perturbations from vortex excitations of Bose-Einstein condensates(BEC) is investigated by numerical integration of the associated Klein-Gordon equation. It is found that, at sufficiently high angular speeds, sound wave-packets can extract a sizeable fraction of the vortex energy through a ... |
1309.5833 | Izzet Sakalli | I. Sakalli and S.F. Mirekhtiary | Effect of the Refractive Index on the Hawking Temperature: An
Application of the Hamilton-Jacobi Method | Typo in the DOI has been corrected. Some misprints are fixed | Journal of Experimental and Theoretical Physics, 117, 656, 2013 | 10.1134/S1063776113120066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation of a non-asymptotically flat (NAF) 4-dimensional
spherically symmetric and static dilatonic black hole (BH) via the
Hamilton-Jacobi (HJ) method has been studied. In addition to the naive
coordinates, we have used four more different coordinate systems which are
well-behaved at the horizon. Except th... | [
{
"created": "Mon, 23 Sep 2013 15:12:44 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2013 19:59:44 GMT",
"version": "v2"
}
] | 2013-11-21 | [
[
"Sakalli",
"I.",
""
],
[
"Mirekhtiary",
"S. F.",
""
]
] | Hawking radiation of a non-asymptotically flat (NAF) 4-dimensional spherically symmetric and static dilatonic black hole (BH) via the Hamilton-Jacobi (HJ) method has been studied. In addition to the naive coordinates, we have used four more different coordinate systems which are well-behaved at the horizon. Except the ... |
2111.06794 | Alexander Ganz | Nicola Bartolo, Alexander Ganz, Sabino Matarrese | Cuscuton Inflation | Revised argumentation for the horizon crossing. This is the accepted
version of an article accepted for publication in Journal of Cosmology and
Astroparticle Physics. Neither SISSA Medialab Srl nor IOP Publishing Ltd is
responsible for any errors or omissions in this version of the manuscript or
any version der... | null | 10.1088/1475-7516/2022/05/008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the impact of (generalized) cuscuton models on standard single
scalar field inflation. Generalized cuscuton models are characterized by
spatial covariant gravity where a scalar degree of freedom is made non
dynamical, and there are just two tensor degrees of freedom. The presence of
the non-dynamical scalar ... | [
{
"created": "Fri, 12 Nov 2021 16:10:50 GMT",
"version": "v1"
},
{
"created": "Mon, 9 May 2022 13:45:48 GMT",
"version": "v2"
}
] | 2022-05-10 | [
[
"Bartolo",
"Nicola",
""
],
[
"Ganz",
"Alexander",
""
],
[
"Matarrese",
"Sabino",
""
]
] | We study the impact of (generalized) cuscuton models on standard single scalar field inflation. Generalized cuscuton models are characterized by spatial covariant gravity where a scalar degree of freedom is made non dynamical, and there are just two tensor degrees of freedom. The presence of the non-dynamical scalar fi... |
1110.5332 | Piero Nicolini | Piero Nicolini, Alessio Orlandi, Euro Spallucci | The final stage of gravitationally collapsed thick matter layers | v2: 13 pages, 5 figures (1 figure added), text edited, additional
references, in press on the special issue "Experimental Tests of Quantum
Gravity and Exotic Quantum Field Theory Effects'' of Adv. High En. Phys | Adv.High Energy Phys. 2013 (2013) 812084 | 10.1155/2013/812084 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the presence of a minimal length physical objects cannot collapse to an
infinite density, singular, matter point. In this note we consider the possible
final stage of the gravitational collapse of "thick" matter layers. The energy
momentum tensor we choose to model these shell-like objects is a proper
modification... | [
{
"created": "Mon, 24 Oct 2011 20:00:05 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Nov 2013 10:12:42 GMT",
"version": "v2"
}
] | 2013-12-24 | [
[
"Nicolini",
"Piero",
""
],
[
"Orlandi",
"Alessio",
""
],
[
"Spallucci",
"Euro",
""
]
] | In the presence of a minimal length physical objects cannot collapse to an infinite density, singular, matter point. In this note we consider the possible final stage of the gravitational collapse of "thick" matter layers. The energy momentum tensor we choose to model these shell-like objects is a proper modification o... |
1809.04956 | Laura Stricker | Laura Stricker and Hans Christian \"Ottinger | Stability analysis for a thermodynamically consistent model of
relativistic fluid dynamics | null | Phys. Rev. E 99, 013105 (2019) | 10.1103/PhysRevE.99.013105 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The search for thermodynamic admissibility moreover reveals a fundamental
difference between liquids and gases in relativistic fluid dynamics, as the
reversible convection mechanism is much simpler for liquids than for gases. In
relativistic fluid mechanics, positive entropy production is known to be
insufficient for... | [
{
"created": "Wed, 12 Sep 2018 10:29:54 GMT",
"version": "v1"
}
] | 2019-01-16 | [
[
"Stricker",
"Laura",
""
],
[
"Öttinger",
"Hans Christian",
""
]
] | The search for thermodynamic admissibility moreover reveals a fundamental difference between liquids and gases in relativistic fluid dynamics, as the reversible convection mechanism is much simpler for liquids than for gases. In relativistic fluid mechanics, positive entropy production is known to be insufficient for g... |
2407.21114 | Yen Chin Ong | Michael R.R. Good, Yen Chin Ong | Hawking Temperature and the Inverse-Radius Scale of the Horizon | 4 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hawking temperature of a Schwarzschild black hole can be heuristically
derived by identifying the temperature with the inverse radius of the horizon
up to a multiplicative constant. This does not work for more general black
holes such as the Kerr and Reissner-Nordstr\"om solutions. Expounding on the
details of ho... | [
{
"created": "Tue, 30 Jul 2024 18:11:55 GMT",
"version": "v1"
}
] | 2024-08-01 | [
[
"Good",
"Michael R. R.",
""
],
[
"Ong",
"Yen Chin",
""
]
] | The Hawking temperature of a Schwarzschild black hole can be heuristically derived by identifying the temperature with the inverse radius of the horizon up to a multiplicative constant. This does not work for more general black holes such as the Kerr and Reissner-Nordstr\"om solutions. Expounding on the details of how ... |
1006.3241 | George Gillies | Jason R. Buzcyna, C. S. Unnikrishnan, and George T. Gillies | Standard and derived Planck quantities: selected analysis and
derivations | 22 pages, 1 table | null | 10.1134/S0202289311040037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an overview of the fundamental units of physical quantities
determined naturally by the values of fundamental constants of nature. We
discuss a comparison between the 'Planck units', now widely used in theoretical
physics and the pre-quantum 'Stoney units' in which, instead of the Planck
constant, the char... | [
{
"created": "Wed, 16 Jun 2010 15:00:30 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Buzcyna",
"Jason R.",
""
],
[
"Unnikrishnan",
"C. S.",
""
],
[
"Gillies",
"George T.",
""
]
] | We provide an overview of the fundamental units of physical quantities determined naturally by the values of fundamental constants of nature. We discuss a comparison between the 'Planck units', now widely used in theoretical physics and the pre-quantum 'Stoney units' in which, instead of the Planck constant, the charge... |
1302.6017 | Artyom Yurov | Anna V. Yaparova, Artyom V. Yurov, Valerian A. Yurov | Application of the Abel Equation of the 1st kind to an inflation
analysis of non-exactly solvable cosmological models | 18 pages, 17 figures, 4 tables | Grav.Cosmol. 20 (2014) no.2, 106-115 (2014) | 10.1134/S0202289314020121 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we revisit the relationship between the Einstein--Friedman and
the Abel equations to demonstrate how it might be applied to the inflationary
analysis in a flat Friedman universe filled with a real-valued scalar field.
The analysis is performed for three distinct cases of polynomial potentials. As
a resu... | [
{
"created": "Mon, 25 Feb 2013 08:30:43 GMT",
"version": "v1"
}
] | 2019-07-30 | [
[
"Yaparova",
"Anna V.",
""
],
[
"Yurov",
"Artyom V.",
""
],
[
"Yurov",
"Valerian A.",
""
]
] | In this paper we revisit the relationship between the Einstein--Friedman and the Abel equations to demonstrate how it might be applied to the inflationary analysis in a flat Friedman universe filled with a real-valued scalar field. The analysis is performed for three distinct cases of polynomial potentials. As a result... |
2307.15187 | Donniel Cruz | Donniel Cruz and Emmanuel Rodulfo | Characteristic Length Scale and Dynamics of $\chi^{3/2}$-MOND Cosmology | 6 pages, presented at De La Salle University - Manila Research
Congress 2023 Parallel Sessions on July 7, 2023 (proceedings:
https://www.dlsu.edu.ph/dlsu-conference-series/) | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work studies the cosmology of $\chi^{3/2}$-MOND gravity by Bernal et.
al. (2011). This theory is a modification to Einstein's General Relativity (GR)
that uses a dimensionless curvature scalar $\chi$ by rescaling the Ricci scalar
$R$ by some characteristic length scale $L_M$, as well as a set of modified
field e... | [
{
"created": "Thu, 27 Jul 2023 20:32:24 GMT",
"version": "v1"
}
] | 2023-07-31 | [
[
"Cruz",
"Donniel",
""
],
[
"Rodulfo",
"Emmanuel",
""
]
] | This work studies the cosmology of $\chi^{3/2}$-MOND gravity by Bernal et. al. (2011). This theory is a modification to Einstein's General Relativity (GR) that uses a dimensionless curvature scalar $\chi$ by rescaling the Ricci scalar $R$ by some characteristic length scale $L_M$, as well as a set of modified field equ... |
2104.10717 | Tomas Ortin | T. Ort\'in | Komar integrals for theories of higher order in the curvature and
black-hole chemistry | Some misprints corrected | null | 10.1007/JHEP08(2021)023 | IFT-UAM/CSIC-21-42 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct Komar-type integrals for theories of gravity of higher order in
the Riemann curvature coupled to simple kinds of matter (scalar and vector
fields) and we use them to compute Smarr formulae for black-hole solutions in
those theories. The equivalence between f(R) and Brans-Dicke theories is used
to argue t... | [
{
"created": "Wed, 21 Apr 2021 18:36:40 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jun 2021 18:48:43 GMT",
"version": "v2"
}
] | 2021-09-01 | [
[
"Ortín",
"T.",
""
]
] | We construct Komar-type integrals for theories of gravity of higher order in the Riemann curvature coupled to simple kinds of matter (scalar and vector fields) and we use them to compute Smarr formulae for black-hole solutions in those theories. The equivalence between f(R) and Brans-Dicke theories is used to argue tha... |
1807.04637 | Hooman Moradpour | S. Ghaffari, H. Moradpour, I. P. Lobo, J. P. Morais Gra\c{c}a, Valdir
B. Bezerra | Tsallis holographic dark energy in the Brans-Dicke cosmology | Accepted version, Eur. Phys. J. C (2018) | null | 10.1140/epjc/s10052-018-6198-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Tsallis generalized entropy, holographic hypothesis and also
considering the Hubble horizon as the IR cutoff, we build a holographic model
for dark energy and study its cosmological consequences in the Brans-Dicke
framework. At first, we focus on a non-interacting universe, and thereinafter,
we study the re... | [
{
"created": "Tue, 10 Jul 2018 08:45:35 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jul 2018 05:27:20 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Sep 2018 05:40:43 GMT",
"version": "v3"
}
] | 2018-09-05 | [
[
"Ghaffari",
"S.",
""
],
[
"Moradpour",
"H.",
""
],
[
"Lobo",
"I. P.",
""
],
[
"Graça",
"J. P. Morais",
""
],
[
"Bezerra",
"Valdir B.",
""
]
] | Using the Tsallis generalized entropy, holographic hypothesis and also considering the Hubble horizon as the IR cutoff, we build a holographic model for dark energy and study its cosmological consequences in the Brans-Dicke framework. At first, we focus on a non-interacting universe, and thereinafter, we study the resu... |
gr-qc/0504019 | Rituparno Goswami | Rituparno Goswami, Pankaj S. Joshi | A resolution of spacetime singularity and black hole paradoxes through
avoidance of trapped surface formation in Einstein gravity | 7 pages, 1 figure, Revtex4 | null | null | null | gr-qc hep-th | null | The occurrence of a spacetime singularity indicates the breakdown of Einstein
gravitation theory in these extreme regimes. We consider here the singularity
issue and various black hole paradoxes at classical and quantum levels. It is
pointed out that a possible resolution to these problems could be arrived at by
avoi... | [
{
"created": "Tue, 5 Apr 2005 21:55:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Goswami",
"Rituparno",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | The occurrence of a spacetime singularity indicates the breakdown of Einstein gravitation theory in these extreme regimes. We consider here the singularity issue and various black hole paradoxes at classical and quantum levels. It is pointed out that a possible resolution to these problems could be arrived at by avoidi... |
2101.12311 | Bogar D\'iaz | J. Fernando Barbero G., Bogar D\'iaz, Juan Margalef-Bentabol, Eduardo
J. S. Villase\~nor | Hamiltonian Gotay-Nester-Hinds analysis of the parametrized unimodular
extension of the Holst action | 29 pages | Physical Review D, 103 (2021) 064062 | 10.1103/PhysRevD.103.064062 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a detailed account of the Hamiltonian GNH analysis of the
parametrized unimodular extension of the Holst action. The purpose of the paper
is to derive, through the clear geometric picture furnished by the GNH method,
a simple Hamiltonian formulation for this model and explain why it is difficult
to arrive at ... | [
{
"created": "Thu, 28 Jan 2021 22:46:09 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Mar 2021 15:46:11 GMT",
"version": "v2"
}
] | 2021-05-06 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Díaz",
"Bogar",
""
],
[
"Margalef-Bentabol",
"Juan",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We give a detailed account of the Hamiltonian GNH analysis of the parametrized unimodular extension of the Holst action. The purpose of the paper is to derive, through the clear geometric picture furnished by the GNH method, a simple Hamiltonian formulation for this model and explain why it is difficult to arrive at it... |
2309.16444 | Mirko Pitzalis | Mariano Cadoni, Riccardo Murgia, Mirko Pitzalis, Andrea P. Sanna | Quasi-local masses and cosmological coupling of black holes and
mimickers | 16 pages, no figures, some discussions expanded, matches version
published on JCAP | null | 10.1088/1475-7516/2024/03/026 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Motivated by the recent heated debate on whether the masses of local objects,
such as compact stars or black holes (BHs), may be affected by the large-scale,
cosmological dynamics, we analyze the conditions under which, in a general
relativity framework, such a coupling small/large scales is allowed. We shed
light on... | [
{
"created": "Thu, 28 Sep 2023 13:55:06 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Sep 2023 08:38:09 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Mar 2024 09:55:09 GMT",
"version": "v3"
}
] | 2024-03-15 | [
[
"Cadoni",
"Mariano",
""
],
[
"Murgia",
"Riccardo",
""
],
[
"Pitzalis",
"Mirko",
""
],
[
"Sanna",
"Andrea P.",
""
]
] | Motivated by the recent heated debate on whether the masses of local objects, such as compact stars or black holes (BHs), may be affected by the large-scale, cosmological dynamics, we analyze the conditions under which, in a general relativity framework, such a coupling small/large scales is allowed. We shed light on s... |
1103.0179 | Orchidea Maria Lecian | Thibault Damour, Orchidea Maria Lecian | About the Statistical Properties of Cosmological Billiards | 10 pages, 5 figures, 2 tables, Proceedings of The second
Galileo-XuGuangqi Meeting, 11-16/07/2010, Ventimiglia, Italy | Int.J.Mod.Phys.Conf.Ser. 12 (2012) 90-99 | 10.1142/S2010194512006290 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize some recent progress in the understanding of the statistical
properties of cosmological billiards.
| [
{
"created": "Tue, 1 Mar 2011 14:41:54 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Damour",
"Thibault",
""
],
[
"Lecian",
"Orchidea Maria",
""
]
] | We summarize some recent progress in the understanding of the statistical properties of cosmological billiards. |
gr-qc/0612068 | Emil Mottola | Ignatios Antoniadis (CERN), Pawel O. Mazur (So. Carolina) and Emil
Mottola (Los Alamos) | Cosmological Dark Energy: Prospects for a Dynamical Theory | 50 pages, Invited Contribution to New Journal of Physics Focus Issue
on Dark Energy | NewJ.Phys.9:11,2007 | 10.1088/1367-2630/9/1/011 | LA-UR-06-8631 and CERN-PH-TH/2006-251 | gr-qc astro-ph hep-th | null | We present an approach to the problem of vacuum energy in cosmology, based on
dynamical screening of Lambda on the horizon scale. We review first the
physical basis of vacuum energy as a phenomenon connected with macroscopic
boundary conditions, and the origin of the idea of its screening by particle
creation and vac... | [
{
"created": "Tue, 12 Dec 2006 00:33:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Antoniadis",
"Ignatios",
"",
"CERN"
],
[
"Mazur",
"Pawel O.",
"",
"So. Carolina"
],
[
"Mottola",
"Emil",
"",
"Los Alamos"
]
] | We present an approach to the problem of vacuum energy in cosmology, based on dynamical screening of Lambda on the horizon scale. We review first the physical basis of vacuum energy as a phenomenon connected with macroscopic boundary conditions, and the origin of the idea of its screening by particle creation and vacuu... |
1412.3752 | Marc Geiller | Bianca Dittrich, Marc Geiller | Flux formulation of loop quantum gravity: Classical framework | 60 pages, 13 figures, published version | Class. Quantum Grav. 32 (2015) 135016 | 10.1088/0264-9381/32/13/135016 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We recently introduced a new representation for loop quantum gravity, which
is based on the BF vacuum and is in this sense much nearer to the spirit of
spin foam dynamics. In the present paper we lay out the classical framework
underlying this new formulation. The central objects in our construction are
the so-called... | [
{
"created": "Thu, 11 Dec 2014 18:30:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jul 2015 15:17:56 GMT",
"version": "v2"
}
] | 2015-07-03 | [
[
"Dittrich",
"Bianca",
""
],
[
"Geiller",
"Marc",
""
]
] | We recently introduced a new representation for loop quantum gravity, which is based on the BF vacuum and is in this sense much nearer to the spirit of spin foam dynamics. In the present paper we lay out the classical framework underlying this new formulation. The central objects in our construction are the so-called i... |
1702.03430 | Salvatore Capozziello | S. Capozziello, P. Jovanovi\'c, V. Borka Jovanovi\'c, and D. Borka | Addressing the missing matter problem in galaxies through a new
fundamental gravitational radius | 9 pages, 2 figures, to be published in JCAP | null | 10.1088/1475-7516/2017/06/044 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that the existence of a Noether symmetry in $f(R)$ theories of
gravity gives rise to a further gravitational radius, besides the standard
Schwarzschild one, determining the dynamics at galactic scales. By this
feature, it is possible to explain the baryonic Tully-Fisher relation and the
rotation curve ... | [
{
"created": "Sat, 11 Feb 2017 15:37:32 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Apr 2017 14:21:44 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jun 2017 09:18:21 GMT",
"version": "v3"
}
] | 2017-07-26 | [
[
"Capozziello",
"S.",
""
],
[
"Jovanović",
"P.",
""
],
[
"Jovanović",
"V. Borka",
""
],
[
"Borka",
"D.",
""
]
] | We demonstrate that the existence of a Noether symmetry in $f(R)$ theories of gravity gives rise to a further gravitational radius, besides the standard Schwarzschild one, determining the dynamics at galactic scales. By this feature, it is possible to explain the baryonic Tully-Fisher relation and the rotation curve of... |
gr-qc/0508080 | Carlos Augusto Romero Filho | V. B. Bezerra, S. Chervon and C. Romero | Exact solutions of SO(3) non-linear sigma model in a conic space
background | 14 pages - LATEX | Int.J.Mod.Phys. D14 (2005) 1927-1940 | 10.1142/S0218271805007474 | null | gr-qc | null | We consider a nonlinear sigma model coupled to the metric of a conic space.
We obtain restrictions for a nonlinear sigma model to be a source of the conic
space. We then study nonlinear sigma model in the conic space background. We
find coordinate transformations which reduce the chiral fields equations in the
conic ... | [
{
"created": "Fri, 19 Aug 2005 20:05:45 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bezerra",
"V. B.",
""
],
[
"Chervon",
"S.",
""
],
[
"Romero",
"C.",
""
]
] | We consider a nonlinear sigma model coupled to the metric of a conic space. We obtain restrictions for a nonlinear sigma model to be a source of the conic space. We then study nonlinear sigma model in the conic space background. We find coordinate transformations which reduce the chiral fields equations in the conic sp... |
gr-qc/0305066 | Carlos Augusto Romero Filho | C.Romero and F.Dahia | From Kaluza-Klein theory to Campbell-Magaard theorem and beyond | 7 pages- To appear in "Essays in honor to Mario Novello" | null | null | null | gr-qc | null | We give a brief review of recent developments in five-dimensional theories of
spacetime and highlight their geometrical structure mainly in connection with
the Campbell-Magaard theorem.
| [
{
"created": "Sat, 17 May 2003 16:10:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Romero",
"C.",
""
],
[
"Dahia",
"F.",
""
]
] | We give a brief review of recent developments in five-dimensional theories of spacetime and highlight their geometrical structure mainly in connection with the Campbell-Magaard theorem. |
1702.06834 | Bivudutta Mishra Dr. | B. Mishra, P. K. Sahoo, Pratik P. Ray | Accelerating Dark Energy Cosmological Model in Two Fluid with Hybrid
Scale Factor | 9 pages, 5 figures | International Journal of Geometrical Methods in Modern Physics,
Vol.14, 1750124, 2017 | 10.1142/S0219887817501249 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have investigated the anisotropic behavior of the
accelerating universe in Bianchi V space time in the frame work of General
Relativity (GR). The matter field we have considered is of two non interacting
fluids i.e. the usual string fluid and dark energy (DE) fluid. In order to
represent the pressur... | [
{
"created": "Mon, 20 Feb 2017 15:54:53 GMT",
"version": "v1"
}
] | 2018-03-30 | [
[
"Mishra",
"B.",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Ray",
"Pratik P.",
""
]
] | In this paper, we have investigated the anisotropic behavior of the accelerating universe in Bianchi V space time in the frame work of General Relativity (GR). The matter field we have considered is of two non interacting fluids i.e. the usual string fluid and dark energy (DE) fluid. In order to represent the pressure ... |
1506.08696 | Sergiu I. Vacaru | Subhash Rajpoot and Sergiu I. Vacaru | Black Ring and Kerr Ellipsoid - Solitonic Configurations in Modified
Finsler Gravity | 15 pages, latex 2e; version accepted on 25 May 2015 by IJGMMP | Int. J. Geom. Meth. Mod. Phys. 12 (2015) 1550102 | 10.1142/S0219887815501029 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study an effective Einstein-Finsler theory on tangent Lorentz bundle
constructed as a "minimal" extension of general relativity. Black ring and Kerr
like ellipsoid exact solutions and soliton configurations are presented. In
this endeavor the relevant metric depends not only on four dimensional
spacetime coordinat... | [
{
"created": "Fri, 26 Jun 2015 11:57:18 GMT",
"version": "v1"
}
] | 2015-12-18 | [
[
"Rajpoot",
"Subhash",
""
],
[
"Vacaru",
"Sergiu I.",
""
]
] | We study an effective Einstein-Finsler theory on tangent Lorentz bundle constructed as a "minimal" extension of general relativity. Black ring and Kerr like ellipsoid exact solutions and soliton configurations are presented. In this endeavor the relevant metric depends not only on four dimensional spacetime coordinates... |
gr-qc/0405137 | Jonathan R. Gair | Jonathan R Gair, Leor Barack, Teviet Creighton, Curt Cutler, Shane L
Larson, E Sterl Phinney and Michele Vallisneri | Event rate estimates for LISA extreme mass ratio capture sources | 15 pages, 1 figure, to appear in GWDAW 8 proceedings | Class.Quant.Grav. 21 (2004) S1595-S1606 | 10.1088/0264-9381/21/20/003 | null | gr-qc astro-ph | null | One of the most exciting prospects for the LISA gravitational wave
observatory is the detection of gravitational radiation from the inspiral of a
compact object into a supermassive black hole. The large inspiral parameter
space and low amplitude of the signal makes detection of these sources
computationally challengi... | [
{
"created": "Fri, 28 May 2004 03:02:52 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Gair",
"Jonathan R",
""
],
[
"Barack",
"Leor",
""
],
[
"Creighton",
"Teviet",
""
],
[
"Cutler",
"Curt",
""
],
[
"Larson",
"Shane L",
""
],
[
"Phinney",
"E Sterl",
""
],
[
"Vallisneri",
"Michele",
""
]
] | One of the most exciting prospects for the LISA gravitational wave observatory is the detection of gravitational radiation from the inspiral of a compact object into a supermassive black hole. The large inspiral parameter space and low amplitude of the signal makes detection of these sources computationally challenging... |
1807.07660 | Claudia Moreno | Javier M. Antelis and Claudia Moreno | An independent search of gravitational waves in the first observation
run of advanced LIGO using cross-correlation | 12 pages, 6 figures, 1 table | General Relativity and Gravitation (2019) 51:61 | 10.1007/s10714-019-2546-x | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work describes a template-free method to search gravitational waves (GW)
using data from the LIGO observatories simultaneously. The basic idea of this
method is that a GW signal is present in a short-duration data segment if the
maximum correlation-coefficient between the strain signals is higher than a
signific... | [
{
"created": "Thu, 19 Jul 2018 23:09:10 GMT",
"version": "v1"
}
] | 2021-05-07 | [
[
"Antelis",
"Javier M.",
""
],
[
"Moreno",
"Claudia",
""
]
] | This work describes a template-free method to search gravitational waves (GW) using data from the LIGO observatories simultaneously. The basic idea of this method is that a GW signal is present in a short-duration data segment if the maximum correlation-coefficient between the strain signals is higher than a significan... |
2101.06657 | Artyom Astashenok V | Artyom V. Astashenok, Sergei D. Odintsov, Vasilis K. Oikonomou | Dark Energy and Cosmological Horizon Thermal Effects | 15 pp., 7 figs., to appear in Phys. Rev. D | null | 10.1103/PhysRevD.103.043514 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate various dark energy models by taking into account the thermal
effects induced from Hawking radiation on the apparent horizon of the Universe,
for example near a finite-time future singularity. If the dark energy density
increases as the Universe expands, the Universe's evolution reaches a
singularity o... | [
{
"created": "Sun, 17 Jan 2021 12:17:06 GMT",
"version": "v1"
}
] | 2021-02-17 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Oikonomou",
"Vasilis K.",
""
]
] | We investigate various dark energy models by taking into account the thermal effects induced from Hawking radiation on the apparent horizon of the Universe, for example near a finite-time future singularity. If the dark energy density increases as the Universe expands, the Universe's evolution reaches a singularity of ... |
1502.01892 | Paul R. Anderson | Paul R. Anderson, Carmen Molina-Paris, and Dillon H. Sanders | Breakdown of the semiclassical approximation during the early stages of
preheating | 9 pages, 2 figures | Phys. Rev. D 92, 083522 (2015) | 10.1103/PhysRevD.92.083522 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The validity of the semiclassical approximation is investigated during the
preheating phase in models of chaotic inflation using a modification of a
criterion previously proposed for semiclassical gravity. If the modified
criterion is violated then fluctuations of the two-point function for the
quantum fields are lar... | [
{
"created": "Fri, 6 Feb 2015 14:20:55 GMT",
"version": "v1"
}
] | 2015-10-28 | [
[
"Anderson",
"Paul R.",
""
],
[
"Molina-Paris",
"Carmen",
""
],
[
"Sanders",
"Dillon H.",
""
]
] | The validity of the semiclassical approximation is investigated during the preheating phase in models of chaotic inflation using a modification of a criterion previously proposed for semiclassical gravity. If the modified criterion is violated then fluctuations of the two-point function for the quantum fields are large... |
1201.0808 | Vladimir Khatsymovsky | V. M. Khatsymovsky | Faddeev formulation of gravity in discrete form | 18 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Faddeev formulation of gravity, in which the metric is composed of
vector fields. We consider these fields constant in the interior of the
4-simplices of a simplicial complex. The action depends not only on the values
of the fields in the interior of the 4-simplices but on the details of
(regularized) jump o... | [
{
"created": "Wed, 4 Jan 2012 02:29:58 GMT",
"version": "v1"
}
] | 2012-01-05 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We study Faddeev formulation of gravity, in which the metric is composed of vector fields. We consider these fields constant in the interior of the 4-simplices of a simplicial complex. The action depends not only on the values of the fields in the interior of the 4-simplices but on the details of (regularized) jump of ... |
2102.08170 | H{\aa}kan Andr\'easson | H{\aa}kan Andr\'easson | Existence of steady states of the massless Einstein-Vlasov system
surrounding a Schwarzschild black hole | 30 pages, 13 figures | Ann. H. Poincar\'e 22, 4271-4297 (2021) | 10.1007/s00023-021-01104-6 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We show that there exist steady states of the massless Einstein-Vlasov system
which surround a Schwarzschild black hole. The steady states are (thick) shells
with finite mass and compact support. Furthermore we prove that an arbitrary
number of shells, necessarily well separated, can surround the black hole. To
our k... | [
{
"created": "Tue, 16 Feb 2021 14:21:09 GMT",
"version": "v1"
}
] | 2024-02-19 | [
[
"Andréasson",
"Håkan",
""
]
] | We show that there exist steady states of the massless Einstein-Vlasov system which surround a Schwarzschild black hole. The steady states are (thick) shells with finite mass and compact support. Furthermore we prove that an arbitrary number of shells, necessarily well separated, can surround the black hole. To our kno... |
1012.5963 | Volker Schlue | Volker Schlue | Decay of linear waves on higher dimensional Schwarzschild black holes | 93 pages, 7 figures | Anal. PDE 6 (2013) 515-600 | 10.2140/apde.2013.6.515 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider solutions to the linear wave equation on higher
dimensional Schwarzschild black hole spacetimes and prove robust nondegenerate
energy decay estimates that are in principle required in a nonlinear stability
problem. More precisely, it is shown that for solutions to the wave equation
\Box_g\ph... | [
{
"created": "Wed, 29 Dec 2010 15:41:51 GMT",
"version": "v1"
}
] | 2021-08-16 | [
[
"Schlue",
"Volker",
""
]
] | In this paper we consider solutions to the linear wave equation on higher dimensional Schwarzschild black hole spacetimes and prove robust nondegenerate energy decay estimates that are in principle required in a nonlinear stability problem. More precisely, it is shown that for solutions to the wave equation \Box_g\phi=... |
gr-qc/9603008 | Dharam Ahluwalia | D. V. Ahluwalia, C. Burgard | Gravitationally Induced Neutrino-Oscillation Phases | First Prize Gravity Research Foundation Essay (1996). Added two
appendices. Appendix A: Erratum. Appendix B: Neutrino oscillations as a new
energy transport mechanism for supernova explosions (taken from a 1996 JRO
Fellowship proposal) | Gen.Rel.Grav.28:1161-1170,1996 | 10.1007/BF03218936 | null | gr-qc astro-ph hep-ph quant-ph | null | In this essay, we introduce a new effect of gravitationally induced quantum
mechanical phases in neutrino oscillations. These phases arise from an hitherto
unexplored interplay of gravitation and the principle of the linear
superposition of quantum mechanics. In the neighborhood of a 1.4 solar-mass
neutron star, grav... | [
{
"created": "Fri, 8 Mar 1996 01:38:43 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 1996 18:23:00 GMT",
"version": "v2"
},
{
"created": "Sun, 19 May 1996 17:12:38 GMT",
"version": "v3"
},
{
"created": "Fri, 14 Jun 1996 02:00:10 GMT",
"version": "v4"
},
{
"cr... | 2023-04-19 | [
[
"Ahluwalia",
"D. V.",
""
],
[
"Burgard",
"C.",
""
]
] | In this essay, we introduce a new effect of gravitationally induced quantum mechanical phases in neutrino oscillations. These phases arise from an hitherto unexplored interplay of gravitation and the principle of the linear superposition of quantum mechanics. In the neighborhood of a 1.4 solar-mass neutron star, gravit... |
gr-qc/9408013 | Tim Foxon | Timothy J. Foxon | Spin Networks, Turaev-Viro Theory and the Loop Representation | 19 pages in Plain TeX, DAMTP-R-94/30 | Class.Quant.Grav.12:951-964,1995 | 10.1088/0264-9381/12/4/006 | null | gr-qc hep-th | null | We investigate the Ponzano-Regge and Turaev-Viro topological field theories
using spin networks and their $q$-deformed analogues. I propose a new
description of the state space for the Turaev-Viro theory in terms of skein
space, to which $q$-spin networks belong, and give a similar description of the
Ponzano-Regge st... | [
{
"created": "Wed, 10 Aug 1994 16:46:25 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Foxon",
"Timothy J.",
""
]
] | We investigate the Ponzano-Regge and Turaev-Viro topological field theories using spin networks and their $q$-deformed analogues. I propose a new description of the state space for the Turaev-Viro theory in terms of skein space, to which $q$-spin networks belong, and give a similar description of the Ponzano-Regge stat... |
2112.03628 | Stefano Vignolo Professor | Stefano Vignolo, Sante Carloni, Roberto Cianci, Fabrizio Esposito and
Luca Fabbri | Spinor fields in $f(\mathcal{Q})$-gravity | 12 pages | Class. Quantum Grav. 39 (2022) 015009 | 10.1088/1361-6382/ac36e3 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a tetrad-affine approach to $f(\mathcal{Q})$ gravity coupled to
spinor fields of spin-1/2. After deriving the field equations, we derive the
conservation law of the spin density, showing that the latter ensures the
vanishing of the antisymmetric part of the Einstein-like equations, just as it
happens in th... | [
{
"created": "Tue, 7 Dec 2021 10:58:21 GMT",
"version": "v1"
}
] | 2021-12-22 | [
[
"Vignolo",
"Stefano",
""
],
[
"Carloni",
"Sante",
""
],
[
"Cianci",
"Roberto",
""
],
[
"Esposito",
"Fabrizio",
""
],
[
"Fabbri",
"Luca",
""
]
] | We present a tetrad-affine approach to $f(\mathcal{Q})$ gravity coupled to spinor fields of spin-1/2. After deriving the field equations, we derive the conservation law of the spin density, showing that the latter ensures the vanishing of the antisymmetric part of the Einstein-like equations, just as it happens in theo... |
1702.02469 | Pardyumn Kumar Sahoo | P.K. Sahoo, Parbati Sahoo, Binaya K. Bishi | Anisotropic cosmological models in $f(R,T)$ gravity with variable
deceleration parameter | Accepted for publication in Int. J. Geom. Meth. Mod. Phys | Int. J. Geom. Meth. Mod. Phys, 14 (2017) 1750097 | 10.1142/S0219887817500979 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The objective of this work enclosed with the study of spatially homogeneous
anisotropic Bianchi type-I universe in $f(R,T)$ gravity (where $R$ is the Ricci
scalar and $T$ is the trace of stress energy momentum tensor) in two different
cases viz. $f(R,T)=R+2f(T)$ and $f(R,T)=f_1(R)+f_2(T)$ with bulk viscosity
matter c... | [
{
"created": "Tue, 7 Feb 2017 16:51:54 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Feb 2017 13:10:30 GMT",
"version": "v2"
}
] | 2017-03-20 | [
[
"Sahoo",
"P. K.",
""
],
[
"Sahoo",
"Parbati",
""
],
[
"Bishi",
"Binaya K.",
""
]
] | The objective of this work enclosed with the study of spatially homogeneous anisotropic Bianchi type-I universe in $f(R,T)$ gravity (where $R$ is the Ricci scalar and $T$ is the trace of stress energy momentum tensor) in two different cases viz. $f(R,T)=R+2f(T)$ and $f(R,T)=f_1(R)+f_2(T)$ with bulk viscosity matter con... |
1604.07999 | Sebastiano Bernuzzi | Sebastiano Bernuzzi and Tim Dietrich | Gravitational waveforms from binary neutron star mergers with high-order
WENO schemes in numerical relativity | 19 pages, 15 figures | Phys. Rev. D 94, 064062 (2016) | 10.1103/PhysRevD.94.064062 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theoretical modeling of gravitational waveforms from binary neutron star
mergers requires precise numerical relativity simulations. Assessing
convergence of the numerical data and building the error budget is currently
challenging due to the low accuracy of general-relativistic hydrodynamics
schemes and to the gr... | [
{
"created": "Wed, 27 Apr 2016 09:48:15 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 2016 08:43:56 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Dietrich",
"Tim",
""
]
] | The theoretical modeling of gravitational waveforms from binary neutron star mergers requires precise numerical relativity simulations. Assessing convergence of the numerical data and building the error budget is currently challenging due to the low accuracy of general-relativistic hydrodynamics schemes and to the grid... |
1411.3127 | Medeu Abishev | Medeu Abishev, Yerlan Aimuratov, Yermek Aldabergenov, Nurzada Beissen
and Meruert Takibayeva | Some effects of nonlinear vacuum electrodynamics in strong magnetic and
gravitational fields of the pulsar | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the propagation of X-ray and gamma ray emissions in strong
magnetic and gravitational fields of the pulsar in nonlinear vacuum
electrodynamics. We show that the radiation will spread from the pulsar to the
detecting device in the form of two normal modes polarized in mutually
orthogonal planes, and having... | [
{
"created": "Wed, 12 Nov 2014 10:39:50 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Dec 2014 15:39:46 GMT",
"version": "v2"
}
] | 2014-12-12 | [
[
"Abishev",
"Medeu",
""
],
[
"Aimuratov",
"Yerlan",
""
],
[
"Aldabergenov",
"Yermek",
""
],
[
"Beissen",
"Nurzada",
""
],
[
"Takibayeva",
"Meruert",
""
]
] | We consider the propagation of X-ray and gamma ray emissions in strong magnetic and gravitational fields of the pulsar in nonlinear vacuum electrodynamics. We show that the radiation will spread from the pulsar to the detecting device in the form of two normal modes polarized in mutually orthogonal planes, and having d... |
2202.02355 | Dimitry Ayzenberg | Dimitry Ayzenberg | Testing Gravity with Black Hole Shadow Subrings | 28 pages, 11 figures. Submitted to CQG. Comments very welcome! | null | 10.1088/1361-6382/ac655d | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The black hole shadow, first observed by the Event Horizon Telescope in 2017,
is the newest method for studying black holes and understanding gravity. Much
work has gone into understanding the shadow of a Kerr black hole, including all
of the complex astrophysics of the accretion disk, and there are numerous
studies ... | [
{
"created": "Fri, 4 Feb 2022 19:27:58 GMT",
"version": "v1"
}
] | 2022-05-25 | [
[
"Ayzenberg",
"Dimitry",
""
]
] | The black hole shadow, first observed by the Event Horizon Telescope in 2017, is the newest method for studying black holes and understanding gravity. Much work has gone into understanding the shadow of a Kerr black hole, including all of the complex astrophysics of the accretion disk, and there are numerous studies of... |
2211.15983 | Shahar Hod | Shahar Hod | Extremal black holes have external light rings | 9 pages | Physical Review D 107, 024028 (2023) | 10.1103/PhysRevD.107.024028 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | It is proved that spherically symmetric extermal black holes possess at least
one external light ring. Our remarkably compact proof is based on the dominant
energy condition which characterizes the external matter fields in the
non-vacuum extremal black-hole spacetimes.
| [
{
"created": "Tue, 29 Nov 2022 07:30:56 GMT",
"version": "v1"
}
] | 2023-02-01 | [
[
"Hod",
"Shahar",
""
]
] | It is proved that spherically symmetric extermal black holes possess at least one external light ring. Our remarkably compact proof is based on the dominant energy condition which characterizes the external matter fields in the non-vacuum extremal black-hole spacetimes. |
gr-qc/9611058 | null | M.Hotta, T.Kato and K.Nagata | A Comment on the Geometric Entropy and Conical Space | No Figures. To appear in Classical and Quantum Gravity | Class.Quant.Grav. 14 (1997) 1917-1925 | 10.1088/0264-9381/14/7/024 | TU-513 | gr-qc | null | It has been recently pointed out that a definition of the geometric entropy
using the partition function in a conical space does not in general lead to a
positive definite quantity. For a scalar field model with a non-minimal
coupling we clarify the origin of the anomalous behavior from the viewpoint of
the canonical... | [
{
"created": "Mon, 25 Nov 1996 02:25:08 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Apr 1997 02:05:36 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Hotta",
"M.",
""
],
[
"Kato",
"T.",
""
],
[
"Nagata",
"K.",
""
]
] | It has been recently pointed out that a definition of the geometric entropy using the partition function in a conical space does not in general lead to a positive definite quantity. For a scalar field model with a non-minimal coupling we clarify the origin of the anomalous behavior from the viewpoint of the canonical f... |
0903.4041 | Yasusada Nambu | Hayato Kawakami, Eiji Mitsuda, Yasusada Nambu and Akira Tomimatsu | Asymptotic behavior of dynamical variables and naked singularity
formation in spherically symmetric gravitational collapse | Version published in PRD | Phys. Rev. D 80, 024001 (2009) | 10.1103/PhysRevD.80.024001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering gravitational collapse of matter, it is important problem to
clarify what kind of conditions leads to the formation of naked singularity.
For this purpose, we apply the 1+3 orthonormal frame formalism introduced by
Uggla \textit{et al.} to spherically symmetric gravitational collapse of
perfect fluid. Thi... | [
{
"created": "Tue, 24 Mar 2009 09:27:11 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jul 2009 00:48:56 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Kawakami",
"Hayato",
""
],
[
"Mitsuda",
"Eiji",
""
],
[
"Nambu",
"Yasusada",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | Considering gravitational collapse of matter, it is important problem to clarify what kind of conditions leads to the formation of naked singularity. For this purpose, we apply the 1+3 orthonormal frame formalism introduced by Uggla \textit{et al.} to spherically symmetric gravitational collapse of perfect fluid. This ... |
1703.00166 | Faizuddin Ahmed | Faizuddin Ahmed | Cylindrically symmetric, Asymptotically flat, Petrov Type D spacetime
with a Naked Curvature Singularity and Matter Collapse | 14 pages, no figures | Adv. High Energy Phys vol. 2017, Article ID 7943649 (2017) | 10.1155/2017/7943649 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a cylindrically symmetric, Petrov type D, nonexpanding, shear free
and vorticity free solution of Einstein's field equations. The spacetime is
asymptotically flat radially and regular everywhere except on the symmetry axis
where it possesses a naked curvature singularity. The energy momentum tensor of
the ... | [
{
"created": "Wed, 1 Mar 2017 07:51:13 GMT",
"version": "v1"
}
] | 2017-12-05 | [
[
"Ahmed",
"Faizuddin",
""
]
] | We present a cylindrically symmetric, Petrov type D, nonexpanding, shear free and vorticity free solution of Einstein's field equations. The spacetime is asymptotically flat radially and regular everywhere except on the symmetry axis where it possesses a naked curvature singularity. The energy momentum tensor of the sp... |
gr-qc/0306109 | Matt Visser | Damien Martin (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Algorithmic construction of static perfect fluid spheres | Uses revtex4. V2: Minor clarifications, plus an additional section on
how to turn the algorithm into a solution generalization technique. This
version accepted for publication in Physical Review D. Now 7 pages | Phys.Rev. D69 (2004) 104028 | 10.1103/PhysRevD.69.104028 | null | gr-qc | null | Perfect fluid spheres, both Newtonian and relativistic, have attracted
considerable attention as the first step in developing realistic stellar models
(or models for fluid planets). Whereas there have been some early hints on how
one might find general solutions to the perfect fluid constraint in the absence
of a spe... | [
{
"created": "Tue, 24 Jun 2003 00:50:38 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2004 04:00:26 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Martin",
"Damien",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Perfect fluid spheres, both Newtonian and relativistic, have attracted considerable attention as the first step in developing realistic stellar models (or models for fluid planets). Whereas there have been some early hints on how one might find general solutions to the perfect fluid constraint in the absence of a speci... |
2310.14104 | Alexander Goltsev | Natalia Gorobey, Alexander Lukyanenko, A. V. Goltsev | No-boundary Wave Functional and Own Mass of the Universe | 7 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | An alternative formulation of the no-boundary initial state of the universe
in the Euclidean quantum theory of gravity is proposed. Unlike the no-boundary
Hartle-Hawking wave function, in which time appears together with macroscopic
space-time in the semiclassical approximation, in the proposed formalism time
is pres... | [
{
"created": "Sat, 21 Oct 2023 20:09:35 GMT",
"version": "v1"
}
] | 2023-10-24 | [
[
"Gorobey",
"Natalia",
""
],
[
"Lukyanenko",
"Alexander",
""
],
[
"Goltsev",
"A. V.",
""
]
] | An alternative formulation of the no-boundary initial state of the universe in the Euclidean quantum theory of gravity is proposed. Unlike the no-boundary Hartle-Hawking wave function, in which time appears together with macroscopic space-time in the semiclassical approximation, in the proposed formalism time is presen... |
1402.3417 | Giampiero Esposito Dr. | Donato Bini, Giampiero Esposito | Perturbative evaluation of scalar two-point function in the cosmic
microwave background power spectrum | 16 pages, Latex. In the final version, the presentation has been
improved in all sections and in Appendix B, and Reference 23 has been added | null | 10.1103/PhysRevD.89.084032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work in the literature has found a suppression or, instead, an
enhancement of the Cosmic Microwave Background power spectrum in quantum
gravity, although the effect is too small to be observed, in both cases. The
present paper studies in detail the equations recently proposed for a
Born-Oppenheimer-type analys... | [
{
"created": "Fri, 14 Feb 2014 10:17:56 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Mar 2014 07:54:59 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Bini",
"Donato",
""
],
[
"Esposito",
"Giampiero",
""
]
] | Recent work in the literature has found a suppression or, instead, an enhancement of the Cosmic Microwave Background power spectrum in quantum gravity, although the effect is too small to be observed, in both cases. The present paper studies in detail the equations recently proposed for a Born-Oppenheimer-type analysis... |
2009.00264 | Bjoern S. Schmekel | Bjoern S. Schmekel | Extracting Dynamical Degrees of Freedom From the Quasi-Local Energy Term
in the Gravitational Action | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that under proper conditions in an appropriate coordinate system
with a suitable time slicing the Hamiltonian and the Einstein-Hilbert action
including all necessary boundary terms can be written on shell in terms of the
Brown-York quasi-local energy in the absence of matter. If matter is present
the non-... | [
{
"created": "Tue, 1 Sep 2020 06:35:42 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Oct 2023 20:48:14 GMT",
"version": "v2"
}
] | 2023-10-13 | [
[
"Schmekel",
"Bjoern S.",
""
]
] | It is shown that under proper conditions in an appropriate coordinate system with a suitable time slicing the Hamiltonian and the Einstein-Hilbert action including all necessary boundary terms can be written on shell in terms of the Brown-York quasi-local energy in the absence of matter. If matter is present the non-va... |
2010.10708 | Benedito Leandro Neto | Benedito Leandro, Ana Paula de Melo, Ilton Menezes and Romildo Pina | Static Einstein-Maxwell space-time invariant by translation | null | General Relativity and Gravitation (2021) 53:92 | 10.1007/s10714-021-02867-3 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the static Einstein-Maxwell space when it is conformal
to an $n$-dimensional pseudo-Euclidean space, which is invariant under the
action of an $(n-1)$-dimensional translation group. We also provide a complete
classification of such space.
| [
{
"created": "Wed, 21 Oct 2020 02:00:26 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jul 2021 19:54:38 GMT",
"version": "v2"
}
] | 2021-10-20 | [
[
"Leandro",
"Benedito",
""
],
[
"de Melo",
"Ana Paula",
""
],
[
"Menezes",
"Ilton",
""
],
[
"Pina",
"Romildo",
""
]
] | In this paper we study the static Einstein-Maxwell space when it is conformal to an $n$-dimensional pseudo-Euclidean space, which is invariant under the action of an $(n-1)$-dimensional translation group. We also provide a complete classification of such space. |
0808.2068 | Matt Visser | Matt Visser (Victoria University of Wellington) | Explicit form of the Mann-Marolf surface term in (3+1) dimensions | 4 pages; revtex4; V2: Now 5 pages. Improved discussion of the
degenerate case where some eigenvalues of the Einstein tensor are zero. No
change in physics conclusions. This version accepted for publication in
Physical Review D | null | 10.1103/PhysRevD.79.024023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Mann-Marolf surface term is a specific candidate for the "reference
background term" that is to be subtracted from the Gibbons-Hawking surface term
in order make the total gravitational action of asymptotically flat spacetimes
finite. That is, the total gravitational action is taken to be:
(Einstein-Hilbert bul... | [
{
"created": "Thu, 14 Aug 2008 22:52:39 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jan 2009 22:50:40 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The Mann-Marolf surface term is a specific candidate for the "reference background term" that is to be subtracted from the Gibbons-Hawking surface term in order make the total gravitational action of asymptotically flat spacetimes finite. That is, the total gravitational action is taken to be: (Einstein-Hilbert bulk te... |
2104.02627 | Jason Bennett | Jason Bennett | A pedagogical review of gravity as a gauge theory | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After reviewing how Albert Einstein's general relativity (GR) can be viewed
as a gauge theory of the Poincar\'e algebra, we show how \'Elie Cartan's
geometric formulation of Newtonian gravity (Newton-Cartan gravity) can be
viewed as a gauge theory of the Bargmann algebra following the construction of
[R. Andringa, E.... | [
{
"created": "Tue, 6 Apr 2021 16:03:31 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Bennett",
"Jason",
""
]
] | After reviewing how Albert Einstein's general relativity (GR) can be viewed as a gauge theory of the Poincar\'e algebra, we show how \'Elie Cartan's geometric formulation of Newtonian gravity (Newton-Cartan gravity) can be viewed as a gauge theory of the Bargmann algebra following the construction of [R. Andringa, E. B... |
2009.03774 | Daniela Doneva | Daniela D. Doneva, Lucas G. Collodel, Christian J. Kr\"uger, Stoytcho
S. Yazadjiev | Spin-induced scalarization of Kerr black holes with a massive scalar
field | 10 pages, 3 figures. arXiv admin note: text overlap with
arXiv:2008.07391 | null | 10.1140/epjc/s10052-020-08765-3 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we study the onset of the spin-induced scalarization of
a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field.
Our approach is based on a (2+1) time evolution of the relevant linearized
scalar field perturbation equation. We examine the region where the Kerr black
hole beco... | [
{
"created": "Mon, 7 Sep 2020 15:52:07 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Collodel",
"Lucas G.",
""
],
[
"Krüger",
"Christian J.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field. Our approach is based on a (2+1) time evolution of the relevant linearized scalar field perturbation equation. We examine the region where the Kerr black hole become... |
0905.4188 | Maite Dupuis | Maite Dupuis, Etera R. Livine | Pushing Further the Asymptotics of the 6j-symbol | 16 pages | Phys.Rev.D80:024035,2009 | 10.1103/PhysRevD.80.024035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of spinfoam models for quantum gravity, we investigate the
asymptotical behavior of the 6j-symbol at next-to-leading order. We compute it
analytically and check our results against numerical calculations. The
6j-symbol is the building block of the Ponzano-Regge amplitudes for 3d quantum
gravity, and th... | [
{
"created": "Tue, 26 May 2009 12:45:23 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Dupuis",
"Maite",
""
],
[
"Livine",
"Etera R.",
""
]
] | In the context of spinfoam models for quantum gravity, we investigate the asymptotical behavior of the 6j-symbol at next-to-leading order. We compute it analytically and check our results against numerical calculations. The 6j-symbol is the building block of the Ponzano-Regge amplitudes for 3d quantum gravity, and the ... |
1809.09473 | Jie-Wen Chen | Jie-Wen Chen, Yang Zhang | Gravitational wave detection from OJ 287 via a pulsar timing array | 12 pages, 8 figures | MNRAS, 481 (2018), 2249 | 10.1093/mnras/sty2268 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Blazar OJ 287 is a candidate nanoHertz (nHz) gravitational wave (GW) source.
In this article, we investigate the GWs generated by OJ 287 and their potential
detection through a pulsar timing array (PTA). First, we obtain the orbit and
the corresponding GW strain of OJ 287. During the time span of the next 10
years (2... | [
{
"created": "Tue, 25 Sep 2018 13:36:23 GMT",
"version": "v1"
}
] | 2018-09-26 | [
[
"Chen",
"Jie-Wen",
""
],
[
"Zhang",
"Yang",
""
]
] | Blazar OJ 287 is a candidate nanoHertz (nHz) gravitational wave (GW) source. In this article, we investigate the GWs generated by OJ 287 and their potential detection through a pulsar timing array (PTA). First, we obtain the orbit and the corresponding GW strain of OJ 287. During the time span of the next 10 years (201... |
gr-qc/9512015 | Luis Anchordoqui | L. Anchordoqui, M. T. Dova, D. Gomez Dumm and P. Lacentre | Possible test of local Lorentz invariance from $\tau$ decays | 6 revtex pages, 2 figures. Revised version | Z.Phys. C73 (1997) 465-468 | null | null | gr-qc | null | We analyze the possibility of testing local Lorentz invariance from the
observation of tau decays. Future prospects of probing distances below the
electroweak characteristic scale are discussed.
| [
{
"created": "Thu, 7 Dec 1995 18:23:09 GMT",
"version": "v1"
},
{
"created": "Thu, 8 May 1997 22:09:50 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Anchordoqui",
"L.",
""
],
[
"Dova",
"M. T.",
""
],
[
"Dumm",
"D. Gomez",
""
],
[
"Lacentre",
"P.",
""
]
] | We analyze the possibility of testing local Lorentz invariance from the observation of tau decays. Future prospects of probing distances below the electroweak characteristic scale are discussed. |
gr-qc/0203034 | Graham Shore | G.M. Shore | Faster than Light Photons in Gravitational Fields II - Dispersion and
Vacuum Polarisation | 27 pages, 7 figures, TeX with harvmac | Nucl.Phys. B633 (2002) 271-294 | 10.1016/S0550-3213(02)00240-7 | SWAT/333 | gr-qc hep-th | null | Vacuum polarisation in QED in a background gravitational field induces
interactions which effectively violate the strong equivalence principle and
affect the propagation of light. In the low frequency limit, Drummond and
Hathrell have shown that this mechanism leads to superluminal photon
velocities. To confront this... | [
{
"created": "Mon, 11 Mar 2002 19:08:08 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Shore",
"G. M.",
""
]
] | Vacuum polarisation in QED in a background gravitational field induces interactions which effectively violate the strong equivalence principle and affect the propagation of light. In the low frequency limit, Drummond and Hathrell have shown that this mechanism leads to superluminal photon velocities. To confront this p... |
2207.06458 | Luis J. Garay | Carlos Barcel\'o, Valentin Boyanov, Luis J. Garay, Eduardo
Mart\'in-Mart\'inez, Jose M. S\'anchez Vel\'azquez | Warp Drive Aerodynamics | 9 pages, 4 figures | null | 10.1007/JHEP08(2022)288 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we analyse the potential for a warp drive spacetime to develop
instabilities due to the presence of quantum matter. Particularly, we look for
points of infinite blueshift (which are analogous to points of a black hole
inner horizon, known for its semiclassical instability), and categorise them
through th... | [
{
"created": "Wed, 13 Jul 2022 18:14:52 GMT",
"version": "v1"
}
] | 2022-09-14 | [
[
"Barceló",
"Carlos",
""
],
[
"Boyanov",
"Valentin",
""
],
[
"Garay",
"Luis J.",
""
],
[
"Martín-Martínez",
"Eduardo",
""
],
[
"Velázquez",
"Jose M. Sánchez",
""
]
] | In this work we analyse the potential for a warp drive spacetime to develop instabilities due to the presence of quantum matter. Particularly, we look for points of infinite blueshift (which are analogous to points of a black hole inner horizon, known for its semiclassical instability), and categorise them through the ... |
1608.03148 | Shahram Panahiyan | Seyed Hossein Hendi, Gu-Qiang Li, Jie-Xiong Mo, Shahram Panahiyan,
Behzad Eslam Panah | New perspective for black hole thermodynamics in
Gauss-Bonnet-Born-Infeld massive gravity | 18 pages, 10 figures and 7 tables. Matches published version | Eur. Phys. J. C 76, 571 (2016) | 10.1140/epjc/s10052-016-4410-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following earlier study regarding Einstein-Gauss-Bonnet-massive black holes
in the presence of Born-Infeld nonlinear electromagnetic field [S. H. Hendi, B.
Eslam Panah and S. Panahiyan, arXiv:1510.00108], we study thermodynamical
structure and critical behavior of these black holes through various methods in
this pap... | [
{
"created": "Wed, 10 Aug 2016 12:29:47 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jan 2017 11:12:23 GMT",
"version": "v2"
}
] | 2017-01-18 | [
[
"Hendi",
"Seyed Hossein",
""
],
[
"Li",
"Gu-Qiang",
""
],
[
"Mo",
"Jie-Xiong",
""
],
[
"Panahiyan",
"Shahram",
""
],
[
"Panah",
"Behzad Eslam",
""
]
] | Following earlier study regarding Einstein-Gauss-Bonnet-massive black holes in the presence of Born-Infeld nonlinear electromagnetic field [S. H. Hendi, B. Eslam Panah and S. Panahiyan, arXiv:1510.00108], we study thermodynamical structure and critical behavior of these black holes through various methods in this paper... |
1811.00564 | Edward Anderson | Edward Anderson | Geometry from Brackets Consistency | 25 pages including 6 figures now with updated references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue for Brackets Consistency to be a `Pillar of Geometry', i.e. a
foundational approach, other Pillars being 1) Euclid's constructive approach,
2) the algebraic approach, 3) the projective approach, and 4) the geometrical
automorphism groups `Erlangen' approach. We proceed via a distinct Pillar 5) -
Killing's co... | [
{
"created": "Thu, 1 Nov 2018 18:01:37 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2019 15:32:46 GMT",
"version": "v2"
}
] | 2019-10-25 | [
[
"Anderson",
"Edward",
""
]
] | We argue for Brackets Consistency to be a `Pillar of Geometry', i.e. a foundational approach, other Pillars being 1) Euclid's constructive approach, 2) the algebraic approach, 3) the projective approach, and 4) the geometrical automorphism groups `Erlangen' approach. We proceed via a distinct Pillar 5) - Killing's comp... |
1107.3669 | George F. R. Ellis | George F R Ellis | Shear free solutions in General Relativity Theory | 17 pages, no figures. For GRG special issue in honor of Josh Goldberg | null | 10.1007/s10714-011-1244-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Goldberg-Sachs theorem is an exact result on shear-free null geodesics in
a vacuum spacetime. It is compared and contrasted with an exact result for
pressure-free matter: shear-free flows cannot both expand and rotate. In both
cases, the shear-free condition restricts the way distant matter can influence
the loca... | [
{
"created": "Tue, 19 Jul 2011 10:04:05 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Ellis",
"George F R",
""
]
] | The Goldberg-Sachs theorem is an exact result on shear-free null geodesics in a vacuum spacetime. It is compared and contrasted with an exact result for pressure-free matter: shear-free flows cannot both expand and rotate. In both cases, the shear-free condition restricts the way distant matter can influence the local ... |
gr-qc/0304077 | Chris Isham | C.J. Isham | A New Approach to Quantising Space-Time: II. Quantising on a Category of
Sets | Latex2e; minor changes only | Adv.Theor.Math.Phys. 7 (2004) 807-829 | null | null | gr-qc hep-th quant-ph | null | In a recent paper by the author, a new approach was suggested for quantising
space-time, or space. This involved developing a procedure for quantising a
system whose configuration space--or history-theory analogue--is the set of
objects in a (small) category $\Q$. In the present paper, we show how this
theory can be ... | [
{
"created": "Tue, 22 Apr 2003 10:01:10 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jan 2004 18:20:06 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Isham",
"C. J.",
""
]
] | In a recent paper by the author, a new approach was suggested for quantising space-time, or space. This involved developing a procedure for quantising a system whose configuration space--or history-theory analogue--is the set of objects in a (small) category $\Q$. In the present paper, we show how this theory can be ap... |
1712.08603 | Nils Siemonsen | Nils Siemonsen, Jan Steinhoff, Justin Vines | Gravitational waves from spinning binary black holes at the leading
post-Newtonian orders at all orders in spin | 16 pages, 1 figure; updated to match published version | Phys. Rev. D 97, 124046 (2018) | 10.1103/PhysRevD.97.124046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the binding energy, the total gravitational wave energy flux,
and the gravitational wave modes for a binary of rapidly spinning black holes,
working in linearized gravity and at leading orders in the orbital velocity,
but to all orders in the black holes' spins. Though the spins are treated
nonperturbati... | [
{
"created": "Fri, 22 Dec 2017 18:23:39 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jun 2018 10:26:08 GMT",
"version": "v2"
}
] | 2018-06-22 | [
[
"Siemonsen",
"Nils",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Vines",
"Justin",
""
]
] | We determine the binding energy, the total gravitational wave energy flux, and the gravitational wave modes for a binary of rapidly spinning black holes, working in linearized gravity and at leading orders in the orbital velocity, but to all orders in the black holes' spins. Though the spins are treated nonperturbative... |
1408.0739 | Christopher Moore | Christopher J. Moore | The sensitivity of pulsar timing arrays | 7 pages, 4 figures, CONFERENCE PROCEEDINGS 10th International LISA
Symposium | null | 10.1088/1742-6596/610/1/012018 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Simple analytic expressions are derived for the sensitivity curve of a pulsar
timing array (PTA) to both a monochromatic source of gravitational waves and an
isotropic stochastic background of gravitational waves. These derivations are
performed in both frequentist and Bayesian frameworks and the results verified
wit... | [
{
"created": "Mon, 4 Aug 2014 16:36:48 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Moore",
"Christopher J.",
""
]
] | Simple analytic expressions are derived for the sensitivity curve of a pulsar timing array (PTA) to both a monochromatic source of gravitational waves and an isotropic stochastic background of gravitational waves. These derivations are performed in both frequentist and Bayesian frameworks and the results verified with ... |
2109.10744 | Mariano Cadoni | Mariano Cadoni, Mauro Oi, Andrea P. Sanna | Quasi-normal modes and Microscopic Structure of the Schwarzschild Black
Hole | 4 pages, no figures, Revised version: references added | null | 10.1103/PhysRevD.104.L121502 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Maggiore observed that, in the high-damping regime, the quasi-normal modes
spectrum for the Schwarzschild black hole resembles that of a quantum harmonic
oscillator. Motivated by this observation, we describe a black hole as a
statistical ensemble of N quantum harmonic oscillators. By working in the
canonical ensembl... | [
{
"created": "Wed, 22 Sep 2021 13:59:38 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Sep 2021 14:48:37 GMT",
"version": "v2"
}
] | 2021-12-15 | [
[
"Cadoni",
"Mariano",
""
],
[
"Oi",
"Mauro",
""
],
[
"Sanna",
"Andrea P.",
""
]
] | Maggiore observed that, in the high-damping regime, the quasi-normal modes spectrum for the Schwarzschild black hole resembles that of a quantum harmonic oscillator. Motivated by this observation, we describe a black hole as a statistical ensemble of N quantum harmonic oscillators. By working in the canonical ensemble,... |
gr-qc/0209098 | Mike Ashley | Michael J. S. L. Ashley | The stability of abstract boundary essential singularities | to appear in GRG October 2002 - contains tex source and 2 ps figures | Gen.Rel.Grav. 34 (2002) 1625-1635 | null | null | gr-qc math-ph math.MP | null | The abstract boundary has, in recent years, proved a general and flexible way
to define the singularities of space-time. In this approach an essential
singularity is a non-regular boundary point of an embedding which is accessible
by a chosen family of curves within finite parameter distance. Ashley and Scott
proved ... | [
{
"created": "Thu, 26 Sep 2002 01:44:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ashley",
"Michael J. S. L.",
""
]
] | The abstract boundary has, in recent years, proved a general and flexible way to define the singularities of space-time. In this approach an essential singularity is a non-regular boundary point of an embedding which is accessible by a chosen family of curves within finite parameter distance. Ashley and Scott proved th... |
gr-qc/9910011 | Thomas Thiemann | T. Thiemann | Reduced Phase Space Quantization of spherically symmetric
Einstein-Maxwell-Theory including a cosmological constant | 6p, LATEX | Int.J.Mod.Phys.D3:293-298,1994 | 10.1142/S0218271894000496 | null | gr-qc | null | We present here the canonical treatment of spherically symmetric (quantum)
gravity coupled to spherically symmetric Maxwell theory with or without a
cosmological constant. The quantization is based on the reduced phase space
which is coordinatized by the mass and the electric charge as well as their
canonically conju... | [
{
"created": "Mon, 4 Oct 1999 17:37:15 GMT",
"version": "v1"
}
] | 2011-04-20 | [
[
"Thiemann",
"T.",
""
]
] | We present here the canonical treatment of spherically symmetric (quantum) gravity coupled to spherically symmetric Maxwell theory with or without a cosmological constant. The quantization is based on the reduced phase space which is coordinatized by the mass and the electric charge as well as their canonically conjuga... |
gr-qc/9711028 | Carlo Rovelli | Carlo Rovelli | A note on the formal structure of quantum constrained systems | 4 pages, no figures, revtex | null | null | null | gr-qc | null | The space of the solutions of Dirac's quantum constraints cannot be
constructed factoring the quantum state space by the ``simple'' gauge
transformations generated by the constraints. However, we show here that it can
be constructed by factoring the state space by suitably defined ``complete''
gauge transformations. ... | [
{
"created": "Fri, 7 Nov 1997 20:19:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rovelli",
"Carlo",
""
]
] | The space of the solutions of Dirac's quantum constraints cannot be constructed factoring the quantum state space by the ``simple'' gauge transformations generated by the constraints. However, we show here that it can be constructed by factoring the state space by suitably defined ``complete'' gauge transformations. Th... |
gr-qc/0603016 | Viktor Toth | Viktor T Toth and Slava G Turyshev | The Pioneer Anomaly: Seeking an explanation in newly recovered data | Final manuscript prior to publication; 20 pages, 23 figures, 1 table | Can.J.Phys.84:1063-1087,2006 | 10.1139/P07-005 | null | gr-qc | null | The Pioneer 10 and 11 spacecraft yielded very accurate navigation that was
limited only by a small, anomalous frequency drift of their carrier signals
received by the NASA Deep Space Network (DSN). This discrepancy, evident in the
data for both spacecraft, was interpreted as an approximately constant
acceleration and... | [
{
"created": "Tue, 7 Mar 2006 20:41:38 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2007 17:17:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Toth",
"Viktor T",
""
],
[
"Turyshev",
"Slava G",
""
]
] | The Pioneer 10 and 11 spacecraft yielded very accurate navigation that was limited only by a small, anomalous frequency drift of their carrier signals received by the NASA Deep Space Network (DSN). This discrepancy, evident in the data for both spacecraft, was interpreted as an approximately constant acceleration and h... |
0705.2443 | Daisuke Yamauchi | Daisuke Yamauchi and Misao Sasaki | A Brane World in an Arbitrary Number of Dimensions without Z_2 Symmetry | 12 pages, no figure, PTPtex. Typos corrected and references updated.
The title has been slightly modified. Final version to be published in Prog.
Theor. Phys | Prog.Theor.Phys.118:245-256,2007 | 10.1143/PTP.118.245 | null | gr-qc astro-ph hep-th | null | We consider a brane world in an arbitrary number of dimensions without Z_2
symmetry and derive the effective Einstein equation on the brane, where its
right-hand side is given by the matter on the brane and the curvature in the
bulk. This is achieved by first deriving the junction conditions for a non-Z_2
symmetric b... | [
{
"created": "Wed, 16 May 2007 22:06:16 GMT",
"version": "v1"
},
{
"created": "Sat, 26 May 2007 15:10:36 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Aug 2007 10:03:00 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Yamauchi",
"Daisuke",
""
],
[
"Sasaki",
"Misao",
""
]
] | We consider a brane world in an arbitrary number of dimensions without Z_2 symmetry and derive the effective Einstein equation on the brane, where its right-hand side is given by the matter on the brane and the curvature in the bulk. This is achieved by first deriving the junction conditions for a non-Z_2 symmetric bra... |
2308.07232 | Alex Deich | Alexander Deich, Nicol\'as Yunes, Charles Gammie | Lyapunov Exponents to Test General Relativity | 11 pages, 5 figures, new version to reflect correction of some typos
in companion paper | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Photon rings are key targets for near-future space-based very-long baseline
interferometry missions. The ratio of flux measured between successive
light-rings is characterized by the Lyapunov exponents of the corresponding
nearly-bound null geodesics. Therefore, understanding Lyapunov exponents in
this environment is... | [
{
"created": "Mon, 14 Aug 2023 16:16:03 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2024 15:10:15 GMT",
"version": "v2"
}
] | 2024-02-22 | [
[
"Deich",
"Alexander",
""
],
[
"Yunes",
"Nicolás",
""
],
[
"Gammie",
"Charles",
""
]
] | Photon rings are key targets for near-future space-based very-long baseline interferometry missions. The ratio of flux measured between successive light-rings is characterized by the Lyapunov exponents of the corresponding nearly-bound null geodesics. Therefore, understanding Lyapunov exponents in this environment is o... |
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