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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0307091 | Bryan Kelleher | Bryan Kelleher (University College Cork) | Scale-invariant gravity: Spacetime recovered | Replaced with final version: minor changes to text | Class.Quant.Grav. 21 (2004) 483-495 | 10.1088/0264-9381/21/2/012 | null | gr-qc | null | The configuration space of general relativity is superspace - the space of
all Riemannian 3-metrics modulo diffeomorphisms. However, it has been argued
that the configuration space for gravity should be conformal superspace - the
space of all Riemannian 3-metrics modulo diffeomorphisms and conformal
transformations. ... | [
{
"created": "Mon, 21 Jul 2003 14:15:28 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Oct 2003 13:54:46 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jul 2004 11:53:43 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Kelleher",
"Bryan",
"",
"University College Cork"
]
] | The configuration space of general relativity is superspace - the space of all Riemannian 3-metrics modulo diffeomorphisms. However, it has been argued that the configuration space for gravity should be conformal superspace - the space of all Riemannian 3-metrics modulo diffeomorphisms and conformal transformations. Re... |
gr-qc/0104076 | Diego F. Torres | Ernesto Eiroa, Gustavo E. Romero, and Diego F. Torres | Chromaticity effects in microlensing by wormholes | To appear in Modern Physics Letters A, 2001 | Mod.Phys.Lett. A16 (2001) 973-984 | 10.1142/S021773230100398X | null | gr-qc astro-ph | null | Chromaticity effects introduced by the finite source size in microlensing
events by presumed natural wormholes are studied. It is shown that these
effects provide a specific signature that allow to discriminate between
ordinary and negative mass lenses through the spectral analysis of the
microlensing events. Both ga... | [
{
"created": "Tue, 24 Apr 2001 11:54:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Eiroa",
"Ernesto",
""
],
[
"Romero",
"Gustavo E.",
""
],
[
"Torres",
"Diego F.",
""
]
] | Chromaticity effects introduced by the finite source size in microlensing events by presumed natural wormholes are studied. It is shown that these effects provide a specific signature that allow to discriminate between ordinary and negative mass lenses through the spectral analysis of the microlensing events. Both gala... |
gr-qc/0602071 | Bahram Mashhoon | C. Chicone and B. Mashhoon | Tidal Dynamics in Kerr Spacetime | 15 pages, 3 figures; v2: slightly expanded version accepted for
publication in CQG | Class.Quant.Grav. 23 (2006) 4021-4033 | 10.1088/0264-9381/23/12/002 | null | gr-qc astro-ph | null | The motion of free nearby test particles relative to a stable equatorial
circular geodesic orbit about a Kerr source is investigated. It is shown that
the nonlinear generalized Jacobi equation can be transformed in this case to an
autonomous form. Tidal dynamics beyond the critical speed c/sqrt(2) is studied.
We show... | [
{
"created": "Sun, 19 Feb 2006 00:11:31 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Apr 2006 21:50:04 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | The motion of free nearby test particles relative to a stable equatorial circular geodesic orbit about a Kerr source is investigated. It is shown that the nonlinear generalized Jacobi equation can be transformed in this case to an autonomous form. Tidal dynamics beyond the critical speed c/sqrt(2) is studied. We show, ... |
1107.3917 | Antonio De Felice | Antonio De Felice, Shinji Tsujikawa | Inflationary non-Gaussianities in the most general second-order
scalar-tensor theories | 17 pages, 1 figure, uses RevTeX. The version to appear in Physical
Review D | Phys.Rev.D84:083504, 2011 | 10.1103/PhysRevD.84.083504 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For very general scalar-field theories in which the equations of motion are
at second-order, we evaluate the three-point correlation function of primordial
scalar perturbations generated during inflation. We show that the shape of
non-Gaussianities is well approximated by the equilateral type. The equilateral
non-lin... | [
{
"created": "Wed, 20 Jul 2011 08:30:31 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2011 09:40:13 GMT",
"version": "v2"
}
] | 2011-10-11 | [
[
"De Felice",
"Antonio",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | For very general scalar-field theories in which the equations of motion are at second-order, we evaluate the three-point correlation function of primordial scalar perturbations generated during inflation. We show that the shape of non-Gaussianities is well approximated by the equilateral type. The equilateral non-linea... |
2306.11531 | Vladimir Khatsymovsky | V.M. Khatsymovsky | On the gravitational diagram technique in the discrete setup | 46 pages, 5 figures, typos corrected, refs added, typical diagrams
added | Int. J. Mod. Phys. A, Volume No. 38, Issue No. 26n27, Article No.
2350143, Year 2023 | 10.1142/S0217751X23501439 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is in the spirit of our work on the consequences of the Regge
calculus, where some edge length scale arises as an optimal initial point of
the perturbative expansion after functional integration over connection.
Now consider the perturbative expansion itself. To obtain an algorithmizable
diagram techni... | [
{
"created": "Tue, 20 Jun 2023 13:35:31 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Dec 2023 15:33:57 GMT",
"version": "v2"
}
] | 2024-01-03 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | This article is in the spirit of our work on the consequences of the Regge calculus, where some edge length scale arises as an optimal initial point of the perturbative expansion after functional integration over connection. Now consider the perturbative expansion itself. To obtain an algorithmizable diagram technique,... |
gr-qc/0606084 | Nivaldo Agostinho Lemos | Edesio M. Barboza Jr. and Nivaldo A. Lemos | Does the Big Rip survive quantization? | Ref. [21] added, abstract slightly changed | Gen. Rel. Grav. {\bf 38}, 1609 (2006) | 10.1007/s10714-006-0333-y | null | gr-qc | null | It is known that certain quantum cosmological models present quantum behavior
for large scale factors. Since quantization can suppress past singularities, it
is natural to inquire whether quantum effects can prevent future singularities.
To this end, a Friedmann-Robertson-Walker quantum cosmological model dominated
b... | [
{
"created": "Mon, 19 Jun 2006 21:09:45 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Feb 2007 19:50:59 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Barboza",
"Edesio M.",
"Jr."
],
[
"Lemos",
"Nivaldo A.",
""
]
] | It is known that certain quantum cosmological models present quantum behavior for large scale factors. Since quantization can suppress past singularities, it is natural to inquire whether quantum effects can prevent future singularities. To this end, a Friedmann-Robertson-Walker quantum cosmological model dominated by ... |
1701.06161 | Daniele Pranzetti | Ramit Dey, Stefano Liberati, Daniele Pranzetti | The black hole quantum atmosphere | 11 pages, 5 figures, minor revision and inclusion of a qualitative
analysis of how to extend our argument to higher dimensions to match the
published version | Phys.Lett. B774 (2017) 308-316 | 10.1016/j.physletb.2017.09.076 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ever since the discovery of black hole evaporation, the region of origin of
the radiated quanta has been a topic of debate. Recently it was argued by
Giddings that the Hawking quanta originate from a region well outside the black
hole horizon by calculating the effective radius of a radiating body via the
Stefan--Bol... | [
{
"created": "Sun, 22 Jan 2017 13:06:29 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2017 12:31:18 GMT",
"version": "v2"
}
] | 2017-10-11 | [
[
"Dey",
"Ramit",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | Ever since the discovery of black hole evaporation, the region of origin of the radiated quanta has been a topic of debate. Recently it was argued by Giddings that the Hawking quanta originate from a region well outside the black hole horizon by calculating the effective radius of a radiating body via the Stefan--Boltz... |
1312.3539 | Jutta Kunz | Olga Hauser, Rustam Ibadov, Burkhard Kleihaus, Jutta Kunz | Hairy Wormholes and Bartnik-McKinnon Solutions | 25 pages | Phys. Rev. D 89, 064010 (2014) | 10.1103/PhysRevD.89.064010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Lorentzian wormholes supported by a phantom field and threaded by
non-trivial Yang-Mills fields, which may be regarded as hair on the Ellis
wormhole. Like the Bartnik-McKinnon solutions and their associated hairy black
holes, these hairy wormholes form infinite sequences, labeled by the node
number $k$ of... | [
{
"created": "Thu, 12 Dec 2013 16:35:44 GMT",
"version": "v1"
}
] | 2014-03-12 | [
[
"Hauser",
"Olga",
""
],
[
"Ibadov",
"Rustam",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We consider Lorentzian wormholes supported by a phantom field and threaded by non-trivial Yang-Mills fields, which may be regarded as hair on the Ellis wormhole. Like the Bartnik-McKinnon solutions and their associated hairy black holes, these hairy wormholes form infinite sequences, labeled by the node number $k$ of t... |
2209.02067 | Mikhail Smolyakov | Vadim Egorov, Mikhail Smolyakov, Igor Volobuev | Doubling of physical states in the quantum scalar field theory for a
remote observer in the Schwarzschild spacetime | 23 pages, 1 figure. v2: major revision of Section 3.3 (more accurate
asymptotics of radial solutions are used), the rest of the text slightly
modified, one reference added. v3: Conclusion expanded, 3 references added,
minor corrections in the rest of the text, typos corrected | Phys. Rev. D 107, 025001 (2023) | 10.1103/PhysRevD.107.025001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the problem of canonical quantization of a free real massive
scalar field in the Schwarzschild spacetime. It is shown that a consistent
procedure of canonical quantization of the field can be carried out without
taking into account the black hole interior, so that in the resulting theory
the canonical comm... | [
{
"created": "Mon, 5 Sep 2022 17:26:11 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Oct 2022 21:06:39 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jan 2023 17:28:20 GMT",
"version": "v3"
}
] | 2023-01-05 | [
[
"Egorov",
"Vadim",
""
],
[
"Smolyakov",
"Mikhail",
""
],
[
"Volobuev",
"Igor",
""
]
] | We discuss the problem of canonical quantization of a free real massive scalar field in the Schwarzschild spacetime. It is shown that a consistent procedure of canonical quantization of the field can be carried out without taking into account the black hole interior, so that in the resulting theory the canonical commut... |
1506.03612 | Remo Garattini | Remo Garattini | Traversable Wormholes in Distorted Gravity | 12 pages, to appear in a special volume of the IJMPD, dedicated to
the VII Black Holes Workshop, Aveiro, Portugal, 18-19 December 2014 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the effects of Distorted Gravity on the traversability of the
wormholes. In particular, we consider configurations which are sustained by
their own gravitational quantum fluctuations. The Ultra-Violet divergences
appearing to one loop are taken under control with the help of a Noncommutative
geometry repr... | [
{
"created": "Thu, 11 Jun 2015 10:22:24 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Garattini",
"Remo",
""
]
] | We consider the effects of Distorted Gravity on the traversability of the wormholes. In particular, we consider configurations which are sustained by their own gravitational quantum fluctuations. The Ultra-Violet divergences appearing to one loop are taken under control with the help of a Noncommutative geometry repres... |
0907.1193 | Robert Beig | Robert Beig, Gary W.Gibbons, Richard M. Schoen | Gravitating Opposites Attract | 13 pages; slightly amended version, some references added, matches
version to be published in Classical and Quantum Gravity | Class.Quant.Grav.26:225013,2009 | 10.1088/0264-9381/26/22/225013 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generalizing previous work by two of us, we prove the non-existence of
certain stationary configurations in General Relativity having a spatial
reflection symmetry across a non-compact surface disjoint from the matter
region. Our results cover cases such that of two symmetrically arranged
rotating bodies with anti-al... | [
{
"created": "Tue, 7 Jul 2009 11:14:20 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Oct 2009 14:10:36 GMT",
"version": "v2"
}
] | 2009-11-09 | [
[
"Beig",
"Robert",
""
],
[
"Gibbons",
"Gary W.",
""
],
[
"Schoen",
"Richard M.",
""
]
] | Generalizing previous work by two of us, we prove the non-existence of certain stationary configurations in General Relativity having a spatial reflection symmetry across a non-compact surface disjoint from the matter region. Our results cover cases such that of two symmetrically arranged rotating bodies with anti-alig... |
1502.06954 | Hideki Maeda | Hideki Maeda | Unitary evolution of the quantum universe with a Brown-Kuchar dust | 36 pages, 6 figures, 4 tables; v2, revised version; v3, fully revised
version with improved analytical and numerical results, accepted for
publication in Classical and Quantum Gravity | Class.Quant.Grav. 32 (2015) 23, 235023 | 10.1088/0264-9381/32/23/235023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the time evolution of a wave function for the spatially flat
Friedmann-Lemaitre-Robertson-Walker universe governed by the Wheeler-DeWitt
equation in both analytical and numerical methods. We consider a Brown-Kuchar
dust as a matter field in order to introduce a "clock" in quantum cosmology and
adopt the Lapl... | [
{
"created": "Tue, 24 Feb 2015 20:59:59 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 2015 04:36:29 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Oct 2015 06:44:44 GMT",
"version": "v3"
}
] | 2015-12-14 | [
[
"Maeda",
"Hideki",
""
]
] | We study the time evolution of a wave function for the spatially flat Friedmann-Lemaitre-Robertson-Walker universe governed by the Wheeler-DeWitt equation in both analytical and numerical methods. We consider a Brown-Kuchar dust as a matter field in order to introduce a "clock" in quantum cosmology and adopt the Laplac... |
1503.03657 | Hirosuke Kuwabara | H. Kuwabara, T. Yumibayashi and H. Harada | Time dependent Pais-Uhlenbeck oscillator and its decomposition | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Pais-Uhlenbeck(PU) oscillator is the simplest model with higher time
derivatives. Its properties were studied for a long time. In this paper, we
extend the 4th order free PU oscillator to a more non-trivial case, dubbed the
4th order time dependent PU oscillator, which has time dependent frequencies.
We show that... | [
{
"created": "Thu, 12 Mar 2015 10:01:59 GMT",
"version": "v1"
}
] | 2015-03-13 | [
[
"Kuwabara",
"H.",
""
],
[
"Yumibayashi",
"T.",
""
],
[
"Harada",
"H.",
""
]
] | The Pais-Uhlenbeck(PU) oscillator is the simplest model with higher time derivatives. Its properties were studied for a long time. In this paper, we extend the 4th order free PU oscillator to a more non-trivial case, dubbed the 4th order time dependent PU oscillator, which has time dependent frequencies. We show that t... |
2205.02499 | Jan Harms | Jan Harms, Ulyana Dupletsa, Biswajit Banerjee, Marica Branchesi, Boris
Goncharov, Andrea Maselli, Ana Carolina Silva Oliveira, Samuele Ronchini,
Jacopo Tissino | GWFish: A simulation software to evaluate parameter-estimation
capabilities of gravitational-wave detector networks | 15 pages, 9 figures | Astronomy and Computing 42, 100671 (2022) | 10.1016/j.ascom.2022.100671 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | An important step in the planning of future gravitational-wave (GW) detectors
and of the networks they will form is the estimation of their detection and
parameter-estimation capabilities, which is the basis of science-case studies.
Several future GW detectors have been proposed or are under development, which
might ... | [
{
"created": "Thu, 5 May 2022 08:22:04 GMT",
"version": "v1"
}
] | 2022-12-21 | [
[
"Harms",
"Jan",
""
],
[
"Dupletsa",
"Ulyana",
""
],
[
"Banerjee",
"Biswajit",
""
],
[
"Branchesi",
"Marica",
""
],
[
"Goncharov",
"Boris",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Oliveira",
"Ana Carolina Silva",
... | An important step in the planning of future gravitational-wave (GW) detectors and of the networks they will form is the estimation of their detection and parameter-estimation capabilities, which is the basis of science-case studies. Several future GW detectors have been proposed or are under development, which might al... |
1401.8191 | Yury F. Pirogov | Yu. F. Pirogov | Scalar graviton as dark matter | 6 pages. Report presented at the Intern. Session-Conference of SNP
DFS RAS "Physics of Fundamental Interactions", Protvino, 5-8 November 2013 | Phys. Atom. Nucl. 78, 528 (2015) | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the report, the theory of unimodular bimode gravity built on principles of
unimodular gauge invariance/relativity and general covariance is exposed.
Besides the massless tensor graviton of General Relativity, the theory includes
an (almost) massless scalar graviton treated as the gravitational dark matter.
A spher... | [
{
"created": "Fri, 31 Jan 2014 15:14:41 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Pirogov",
"Yu. F.",
""
]
] | In the report, the theory of unimodular bimode gravity built on principles of unimodular gauge invariance/relativity and general covariance is exposed. Besides the massless tensor graviton of General Relativity, the theory includes an (almost) massless scalar graviton treated as the gravitational dark matter. A spheric... |
gr-qc/9710074 | Hisaaki Shinkai | Hisa-aki Shinkai (Washington Univ., St. Louis) and Gen Yoneda (Waseda
Univ.) | Lorentzian dynamics in the Ashtekar gravity | 3 pages, LaTeX, no figures, Proceedings of the 8th Marcel Grossmann
Meeting, Jerusalem, June 1997 (World Scientific); mprocl.sty is included | null | null | null | gr-qc | null | We examine the advantages of the SO(3)-ADM (Ashtekar) formulation of general
relativity, from the point of following the dynamics of the Lorentzian
spacetime in direction of applying this into numerical relativity. We describe
our strategy how to treat new constraints and reality conditions, together with
a proposal ... | [
{
"created": "Tue, 14 Oct 1997 20:47:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shinkai",
"Hisa-aki",
"",
"Washington Univ., St. Louis"
],
[
"Yoneda",
"Gen",
"",
"Waseda\n Univ."
]
] | We examine the advantages of the SO(3)-ADM (Ashtekar) formulation of general relativity, from the point of following the dynamics of the Lorentzian spacetime in direction of applying this into numerical relativity. We describe our strategy how to treat new constraints and reality conditions, together with a proposal of... |
gr-qc/0007054 | Stuart Samuel | Stuart Samuel (Columbia University and City College of New York) | The Earliest Phase Transition? | Latex, 10 pages, 1 figure, to appear in Nucl. Phys. B | Nucl.Phys. B585 (2000) 715-721 | 10.1016/S0550-3213(00)00431-4 | CU-TP-934 and CCNY-HEP-00/1 | gr-qc hep-th | null | The question of a phase transition in exiting the Planck epoch of the early
universe is addressed. An order parameter is proposed to help decide the issue,
and estimates are made concerning its behavior. Our analysis is suggestive that
a phase transition occurred.
| [
{
"created": "Fri, 21 Jul 2000 00:33:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Samuel",
"Stuart",
"",
"Columbia University and City College of New York"
]
] | The question of a phase transition in exiting the Planck epoch of the early universe is addressed. An order parameter is proposed to help decide the issue, and estimates are made concerning its behavior. Our analysis is suggestive that a phase transition occurred. |
2106.16012 | Lloren\c{c} Espinosa-Portal\'es | Llorenc Espinosa-Portales and Juan Garcia-Bellido | Covariant formulation of non-equilibrium thermodynamics in General
Relativity | 14 pages. Comments and references added. New section dealing with
real fluids added. Matches accepted version by PDU | Physics of the Dark Universe 34 (2021) 100893 | 10.1016/j.dark.2021.100893 | IFT-UAM/CSIC-21-74 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a generally-covariant formulation of non-equilibrium
thermodynamics in General Relativity. We find covariant entropic forces arising
from gradients of the entropy density, and a corresponding non-conservation of
the energy momentum tensor in terms of these forces. We also provide a
Hamiltonian formulatio... | [
{
"created": "Wed, 30 Jun 2021 12:20:56 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2021 15:27:56 GMT",
"version": "v2"
}
] | 2021-10-20 | [
[
"Espinosa-Portales",
"Llorenc",
""
],
[
"Garcia-Bellido",
"Juan",
""
]
] | We construct a generally-covariant formulation of non-equilibrium thermodynamics in General Relativity. We find covariant entropic forces arising from gradients of the entropy density, and a corresponding non-conservation of the energy momentum tensor in terms of these forces. We also provide a Hamiltonian formulation ... |
2408.04408 | BaoYu Tan | Baoyu Tan | Hawking radiation of magnetized particles via tunneling of Bardeen black
hole | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we calculated the emission rate of magnetized particles
passing through the event horizon of the Bardeen black hole by using the
Parikh-Wilczek method. The emission spectrum deviates from the pure thermal
spectrum, but conforms to the unitary principle of quantum mechanics. Our
results support the cons... | [
{
"created": "Thu, 8 Aug 2024 12:17:04 GMT",
"version": "v1"
}
] | 2024-08-09 | [
[
"Tan",
"Baoyu",
""
]
] | In this paper, we calculated the emission rate of magnetized particles passing through the event horizon of the Bardeen black hole by using the Parikh-Wilczek method. The emission spectrum deviates from the pure thermal spectrum, but conforms to the unitary principle of quantum mechanics. Our results support the conser... |
1106.4318 | Sam Dolan Dr | Sam R. Dolan and Adrian C. Ottewill | Wave Propagation and Quasinormal Mode Excitation on Schwarzschild
Spacetime | 15 pages, 7 figures | Phys.Rev.D84:104002(2011) | 10.1103/PhysRevD.84.104002 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To seek a deeper understanding of wave propagation on the Schwarzschild
spacetime, we investigate the relationship between (i) the lightcone of an
event and its caustics (self-intersections), (ii) the large-$l$ asymptotics of
quasinormal (QN) modes, and (iii) the singular structure of the retarded Green
function (GF)... | [
{
"created": "Tue, 21 Jun 2011 20:06:02 GMT",
"version": "v1"
}
] | 2011-11-03 | [
[
"Dolan",
"Sam R.",
""
],
[
"Ottewill",
"Adrian C.",
""
]
] | To seek a deeper understanding of wave propagation on the Schwarzschild spacetime, we investigate the relationship between (i) the lightcone of an event and its caustics (self-intersections), (ii) the large-$l$ asymptotics of quasinormal (QN) modes, and (iii) the singular structure of the retarded Green function (GF) f... |
gr-qc/9510049 | Jorge Pullin | Reinaldo Gleiser, Oscar Nicasio, Richard Price, Jorge Pullin | Second order perturbations of a Schwarzschild black hole | 6 pages, RevTeX, no figures, major revision, including several
changes in formulae and presentation | Class.Quant.Grav.13:L117-L124,1996 | 10.1088/0264-9381/13/10/001 | CGQG-96/6-4 | gr-qc astro-ph | null | We study the even-parity $\ell=2$ perturbations of a Schwarzschild black hole
to second order. The Einstein equations can be reduced to a single linear wave
equation with a potential and a source term. The source term is quadratic in
terms of the first order perturbations. This provides a formalism to address
the val... | [
{
"created": "Tue, 24 Oct 1995 22:41:54 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 1996 14:54:03 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Gleiser",
"Reinaldo",
""
],
[
"Nicasio",
"Oscar",
""
],
[
"Price",
"Richard",
""
],
[
"Pullin",
"Jorge",
""
]
] | We study the even-parity $\ell=2$ perturbations of a Schwarzschild black hole to second order. The Einstein equations can be reduced to a single linear wave equation with a potential and a source term. The source term is quadratic in terms of the first order perturbations. This provides a formalism to address the valid... |
gr-qc/0612022 | Lorenzo Iorio | Lorenzo Iorio, Matteo Luca Ruggiero | Constraining models of modified gravity with the double pulsar PSR
J0737-3039A/B system | LaTex2e, World Scientific macros, 10 pages, no figures, 1 table, 27
references. To appear in International Journal of Modern Physics A | Int.J.Mod.Phys.A22:5379-5389,2007 | 10.1142/S0217751X07038001 | null | gr-qc astro-ph nucl-th physics.space-ph | null | In this paper we use Delta P = -1.772341 +/- 13.153788 s between the
phenomenologically determined orbital period P_b of the PSR J0737-3039 double
pulsar system and the purely Keplerian period P^(0)=2\pi\sqrt{a^3/G(m_A+m_B)}
calculated with the system's parameters, determined independently of the third
Kepler law its... | [
{
"created": "Mon, 4 Dec 2006 01:38:05 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2006 10:55:55 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Dec 2006 11:42:57 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Dec 2006 21:25:53 GMT",
"version": "v4"
},
{
"cre... | 2010-10-27 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Ruggiero",
"Matteo Luca",
""
]
] | In this paper we use Delta P = -1.772341 +/- 13.153788 s between the phenomenologically determined orbital period P_b of the PSR J0737-3039 double pulsar system and the purely Keplerian period P^(0)=2\pi\sqrt{a^3/G(m_A+m_B)} calculated with the system's parameters, determined independently of the third Kepler law itsel... |
1703.05860 | Andronikos Paliathanasis | Alex Giacomini, Sameerah Jamal, Genly Leon, Andronikos Paliathanasis
and Joel Saavedra | Dynamical Analysis of an Integrable Cubic Galileon Cosmological Model | 25 pages, 6 figures, to appear in Phys. Rev. D | Phys. Rev. D 95, 124060 (2017) | 10.1103/PhysRevD.95.124060 | null | gr-qc hep-th math-ph math.DS math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a cubic Galileon cosmological model was derived by the assumption
that the field equations are invariant under the action of point
transformations. The cubic Galileon model admits a second conservation law
which means that the field equations form an integrable system. The analysis of
the critical points for... | [
{
"created": "Fri, 17 Mar 2017 01:04:40 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2017 23:55:13 GMT",
"version": "v2"
}
] | 2017-11-28 | [
[
"Giacomini",
"Alex",
""
],
[
"Jamal",
"Sameerah",
""
],
[
"Leon",
"Genly",
""
],
[
"Paliathanasis",
"Andronikos",
""
],
[
"Saavedra",
"Joel",
""
]
] | Recently a cubic Galileon cosmological model was derived by the assumption that the field equations are invariant under the action of point transformations. The cubic Galileon model admits a second conservation law which means that the field equations form an integrable system. The analysis of the critical points for t... |
1707.02874 | Andrea Addazi AndAdd | Andrea Addazi | Suppression of Bekenstein-Hawking radiation in $f(T)$-gravity | null | null | 10.1142/S0217751X1850001X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss semiclassical Nariai black holes in the framework of
$f(T)$-gravity. For a diagonal choice of tetrades, stable Nariai metrics can be
found, emitting Bekenstein-Hawking radiation in semiclassical limit. However,
for a non-diagonal choice of tetrades, evaporation and antievaporation
instabilities are turned ... | [
{
"created": "Mon, 10 Jul 2017 14:25:10 GMT",
"version": "v1"
}
] | 2018-02-14 | [
[
"Addazi",
"Andrea",
""
]
] | We discuss semiclassical Nariai black holes in the framework of $f(T)$-gravity. For a diagonal choice of tetrades, stable Nariai metrics can be found, emitting Bekenstein-Hawking radiation in semiclassical limit. However, for a non-diagonal choice of tetrades, evaporation and antievaporation instabilities are turned on... |
1111.4962 | Jorge Pullin | Nestor Alvarez, Rodolfo Gambini and Jorge Pullin | A local Hamiltonian for spherically symmetric gravity coupled to a
scalar field | 4 pages, no figures, RevTex, final published version | Phys. Rev. Lett. 108, 051301 (2012) | 10.1103/PhysRevLett.108.051301 | LSU-REL-112111 | gr-qc astro-ph.HE hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a gauge fixing of gravity coupled to a scalar field in spherical
symmetry such that the Hamiltonian is an integral over space of a local
density. Such a formulation had proved elusive over the years. As in any gauge
fixing, it works for a restricted set of initial data. We argue that the set
could be large... | [
{
"created": "Mon, 21 Nov 2011 18:27:11 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Nov 2011 17:13:07 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Feb 2012 13:26:05 GMT",
"version": "v3"
}
] | 2012-02-13 | [
[
"Alvarez",
"Nestor",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We present a gauge fixing of gravity coupled to a scalar field in spherical symmetry such that the Hamiltonian is an integral over space of a local density. Such a formulation had proved elusive over the years. As in any gauge fixing, it works for a restricted set of initial data. We argue that the set could be large e... |
0909.1171 | Mark D. Roberts | Mark D. Roberts | Fractional Derivative Cosmology | 11 pages, 2 figures | SOP Transactions on Theoretical Physics1(2014)310 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The degree by which a function can be differentiated need not be restricted
to integer values. Usually most of the field equations of physics are taken to
be second order, curiosity asks what happens if this is only approximately the
case and the field equations are nearly second order. For Robertson-Walker
cosmology... | [
{
"created": "Mon, 7 Sep 2009 15:55:20 GMT",
"version": "v1"
}
] | 2014-06-23 | [
[
"Roberts",
"Mark D.",
""
]
] | The degree by which a function can be differentiated need not be restricted to integer values. Usually most of the field equations of physics are taken to be second order, curiosity asks what happens if this is only approximately the case and the field equations are nearly second order. For Robertson-Walker cosmology t... |
2407.10587 | Pradip Kumar Chattopadhyay Dr. | Debadri Bhattacharjee and Pradip Kumar Chattopadhyay | Charged analogues of a singularity-free anisotropic compact star under
linear $f(Q)$- action | 20 pages, 16 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | This study simulates the characteristics of spherically symmetric,
anisotropic compact stellar bodies with electrical charge within the context of
the $f(Q)$ theory of gravity. Employing the Krori-Barua metric ansatz (K.D.
Krori, J. Barua, J. Phys. A: Math. Gen. 8 (1975) 508) along with a linear form
of $f(Q)$ model,... | [
{
"created": "Mon, 15 Jul 2024 10:08:31 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jul 2024 09:56:20 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Aug 2024 05:18:08 GMT",
"version": "v3"
}
] | 2024-08-02 | [
[
"Bhattacharjee",
"Debadri",
""
],
[
"Chattopadhyay",
"Pradip Kumar",
""
]
] | This study simulates the characteristics of spherically symmetric, anisotropic compact stellar bodies with electrical charge within the context of the $f(Q)$ theory of gravity. Employing the Krori-Barua metric ansatz (K.D. Krori, J. Barua, J. Phys. A: Math. Gen. 8 (1975) 508) along with a linear form of $f(Q)$ model, {... |
0707.2726 | Marco Valerio Battisti | Marco Valerio Battisti and Giovanni Montani | Quantum Dynamics of the Taub Universe in a Generalized Uncertainty
Principle framework | 10 pages, 4 figures; v2: section added, to appear on PRD | Phys.Rev.D77:023518,2008 | 10.1103/PhysRevD.77.023518 | null | gr-qc hep-th | null | The implications of a Generalized Uncertainty Principle on the Taub
cosmological model are investigated. The model is studied in the ADM reduction
of the dynamics and therefore a time variable is ruled out. Such a variable is
quantized in a canonical way and the only physical degree of freedom of the
system (related ... | [
{
"created": "Wed, 18 Jul 2007 14:19:18 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Dec 2007 09:41:46 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Montani",
"Giovanni",
""
]
] | The implications of a Generalized Uncertainty Principle on the Taub cosmological model are investigated. The model is studied in the ADM reduction of the dynamics and therefore a time variable is ruled out. Such a variable is quantized in a canonical way and the only physical degree of freedom of the system (related to... |
gr-qc/0102052 | Gregory James Stephens | G. J. Stephens and B. L. Hu | Notes on Black Hole Phase Transitions | 9 pages, RevTex, 4 incorporated eps figures, To appear in Int. J.
Theor. Phys | Int.J.Theor.Phys. 40 (2001) 2183-2200 | null | UMDPP-01-034, LA-UR-01-0749 | gr-qc cond-mat hep-th | null | In these notes we present a summary of existing ideas about phase transitions
of black hole spacetimes in semiclassical gravity and offer some thoughts on
three possible scenarios by which these transitions could take place. Our first
theme is ilustrated by a quantum atomic black hole system, generalizing to
finite-t... | [
{
"created": "Mon, 12 Feb 2001 21:15:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Stephens",
"G. J.",
""
],
[
"Hu",
"B. L.",
""
]
] | In these notes we present a summary of existing ideas about phase transitions of black hole spacetimes in semiclassical gravity and offer some thoughts on three possible scenarios by which these transitions could take place. Our first theme is ilustrated by a quantum atomic black hole system, generalizing to finite-tem... |
1801.10529 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | The Reconstruction of $f(\phi)R$ and Mimetic Gravity from Viable
Slow-roll Inflation | 28 pages, NPB Accepted | null | 10.1016/j.nuclphysb.2018.01.027 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we extend the bottom-up reconstruction framework of $F(R)$
gravity to other modified gravities, and in particular for $f(\phi)R$ and
mimetic $F(R)$ gravities. We investigate which are the important conditions in
order for the method to work, and we study several viable cosmological
evolutions, focusing ... | [
{
"created": "Wed, 31 Jan 2018 16:29:19 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work, we extend the bottom-up reconstruction framework of $F(R)$ gravity to other modified gravities, and in particular for $f(\phi)R$ and mimetic $F(R)$ gravities. We investigate which are the important conditions in order for the method to work, and we study several viable cosmological evolutions, focusing on... |
2001.00229 | Markus P\"ossel | Markus P\"ossel | The Shapiro time delay and the equivalence principle | 14 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational time delay of light, also called the Shapiro time delay, is
one of the four classical tests of Einstein's theory of general relativity.
This article derives the Newtonian version of the Shapiro time delay from
Einstein's principle of equivalence and the Newtonian description of gravity,
in a manner ... | [
{
"created": "Tue, 31 Dec 2019 13:52:00 GMT",
"version": "v1"
}
] | 2020-01-03 | [
[
"Pössel",
"Markus",
""
]
] | The gravitational time delay of light, also called the Shapiro time delay, is one of the four classical tests of Einstein's theory of general relativity. This article derives the Newtonian version of the Shapiro time delay from Einstein's principle of equivalence and the Newtonian description of gravity, in a manner th... |
1611.03479 | Ramil Izmailov | Kamal K. Nandi, Ramil N. Izmailov, Almir A. Yanbekov and Azat A.
Shayakhmetov | Ring-down gravitational waves and lensing observables: How far can a
wormhole mimic those of a black hole? | 24 pages, 1 figure | Phys. Rev. D 95, 104011 (2017) | 10.1103/PhysRevD.95.104011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been argued that the recently detected ring-down gravity waveforms
could be indicative only of the presence of light rings in a horizonless
object, such as a surgical Schwarzschild wormhole, with the frequencies
differing drastically from those of the horizon quasinormal mode frequencies
$\omega _{\text{QNM}}$... | [
{
"created": "Tue, 8 Nov 2016 05:43:13 GMT",
"version": "v1"
},
{
"created": "Fri, 19 May 2017 11:18:47 GMT",
"version": "v2"
}
] | 2017-05-22 | [
[
"Nandi",
"Kamal K.",
""
],
[
"Izmailov",
"Ramil N.",
""
],
[
"Yanbekov",
"Almir A.",
""
],
[
"Shayakhmetov",
"Azat A.",
""
]
] | It has been argued that the recently detected ring-down gravity waveforms could be indicative only of the presence of light rings in a horizonless object, such as a surgical Schwarzschild wormhole, with the frequencies differing drastically from those of the horizon quasinormal mode frequencies $\omega _{\text{QNM}}$ a... |
gr-qc/9709063 | null | Dieter R. Brill (University of Maryland) | The Cavendish Experiment in General Relativity | 8 pages, LaTeX. Contribution to Festschrift volume for Engelbert
Schucking | null | null | UMDGR 89-40 | gr-qc | null | Solutions of Einstein's equations are discussed in which the ``gravitational
force" is balanced by an electrical force, and which can serve as models for
the Cavendish experiment.
| [
{
"created": "Wed, 24 Sep 1997 20:25:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brill",
"Dieter R.",
"",
"University of Maryland"
]
] | Solutions of Einstein's equations are discussed in which the ``gravitational force" is balanced by an electrical force, and which can serve as models for the Cavendish experiment. |
0806.2186 | Celine Cattoen | Celine Cattoen (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington) | Bounding the Hubble flow in terms of the w parameter | 15 pages | JCAP0811:024,2008 | 10.1088/1475-7516/2008/11/024 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The last decade has seen increasing efforts to circumscribe and bound the
cosmological Hubble flow in terms of model-independent constraints on the
cosmological fluid - such as, for instance, the classical energy conditions of
general relativity. Quite a bit can certainly be said in this regard, but much
more refined... | [
{
"created": "Fri, 13 Jun 2008 05:27:07 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Cattoen",
"Celine",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The last decade has seen increasing efforts to circumscribe and bound the cosmological Hubble flow in terms of model-independent constraints on the cosmological fluid - such as, for instance, the classical energy conditions of general relativity. Quite a bit can certainly be said in this regard, but much more refined b... |
1012.2692 | Mohammad Malekjani | M. Malekjani, A. Khodam-Mohammadi and M. Taji | Cosmological implications of interacting polytropic gas dark energy
model in non-flat universe | 19 pages, 3 figures, accepted by ijtp | International Journal of Theoretical Physics:, Volume 50,
3112-3124, 2011 | 10.1007/s10773-011-0812-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polytropic gas model is investigated as an interacting dark energy
scenario. The cosmological implications of the model including the evolution of
EoS parameter $w_{\Lambda}$, energy density $\Omega_{\Lambda}$ and deceleration
parameter $q$ are investigated. We show that, depending on the parameter of
model, the ... | [
{
"created": "Mon, 13 Dec 2010 11:10:19 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2011 13:10:52 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Malekjani",
"M.",
""
],
[
"Khodam-Mohammadi",
"A.",
""
],
[
"Taji",
"M.",
""
]
] | The polytropic gas model is investigated as an interacting dark energy scenario. The cosmological implications of the model including the evolution of EoS parameter $w_{\Lambda}$, energy density $\Omega_{\Lambda}$ and deceleration parameter $q$ are investigated. We show that, depending on the parameter of model, the in... |
gr-qc/9410010 | Junichi Iwasaki | Junichi Iwasaki (University of Pittsburgh) | A reformulation of the Ponzano-Regge quantum gravity model in terms of
surfaces | latex 11 pages | null | null | null | gr-qc hep-th | null | We reformulate the Ponzano-Regge quantum gravity model in terms of surfaces
on a 3-dimensional simplex lattice. This formulation (1) has a clear relation
to the loop representation of the canonical quantum general relativity in
3-dimensions, (2) may have a 4-dimensional analogue, in contrast to the 6-j
symbolic forma... | [
{
"created": "Mon, 10 Oct 1994 23:49:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Iwasaki",
"Junichi",
"",
"University of Pittsburgh"
]
] | We reformulate the Ponzano-Regge quantum gravity model in terms of surfaces on a 3-dimensional simplex lattice. This formulation (1) has a clear relation to the loop representation of the canonical quantum general relativity in 3-dimensions, (2) may have a 4-dimensional analogue, in contrast to the 6-j symbolic formali... |
1607.02380 | Karim Noui KN | Jibril Ben Achour, Karim Noui and Alejandro Perez | Analytic continuation of the rotating black hole state counting | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In loop quantum gravity, a spherical black hole can be described in terms of
a Chern-Simons theory on a punctured 2-sphere. The sphere represents the
horizon. The punctures are the edges of spin-networks in the bulk which cross
the horizon and carry quanta of area. One can generalize this construction and
model a rot... | [
{
"created": "Fri, 8 Jul 2016 14:28:26 GMT",
"version": "v1"
}
] | 2016-07-11 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
]
] | In loop quantum gravity, a spherical black hole can be described in terms of a Chern-Simons theory on a punctured 2-sphere. The sphere represents the horizon. The punctures are the edges of spin-networks in the bulk which cross the horizon and carry quanta of area. One can generalize this construction and model a rotat... |
2002.06225 | Vassilios Mewes | Vassilios Mewes, Yosef Zlochower, Manuela Campanelli, Thomas W.
Baumgarte, Zachariah B. Etienne, Federico G. Lopez Armengol, Federico
Cipolletta | Numerical relativity in spherical coordinates: A new dynamical spacetime
and general relativistic MHD evolution framework for the Einstein Toolkit | 29 pages, 13 figures, published in Physical Review D | Phys. Rev. D 101, 104007 (2020) | 10.1103/PhysRevD.101.104007 | null | gr-qc astro-ph.HE physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present SphericalNR, a new framework for the publicly available Einstein
Toolkit that numerically solves the Einstein field equations coupled to the
equations of general relativistic magnetohydrodynamics (GRMHD) in a 3+1 split
of spacetime in spherical coordinates without symmetry assumptions. The
spacetime evolut... | [
{
"created": "Fri, 14 Feb 2020 19:28:53 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 17:21:29 GMT",
"version": "v2"
}
] | 2020-05-06 | [
[
"Mewes",
"Vassilios",
""
],
[
"Zlochower",
"Yosef",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Etienne",
"Zachariah B.",
""
],
[
"Armengol",
"Federico G. Lopez",
""
],
[
"Cipolletta... | We present SphericalNR, a new framework for the publicly available Einstein Toolkit that numerically solves the Einstein field equations coupled to the equations of general relativistic magnetohydrodynamics (GRMHD) in a 3+1 split of spacetime in spherical coordinates without symmetry assumptions. The spacetime evolutio... |
1805.11950 | Mohamed Ould El Hadj | Antoine Folacci and Mohamed Ould El Hadj | Electromagnetic radiation generated by a charged particle plunging into
a Schwarzschild black hole: Multipolar waveforms and ringdowns | v2: Figures 1 and 7 modified. Minor changes in the text to match the
published version | Phys. Rev. D 98, 024021 (2018) | 10.1103/PhysRevD.98.024021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic radiation emitted by a charged particle plunging from
slightly below the innermost stable circular orbit into a Schwarzschild black
hole is examined. Both even- and odd-parity electromagnetic perturbations are
considered. They are described by using gauge invariant master functions and
the regularized... | [
{
"created": "Wed, 30 May 2018 13:40:15 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jul 2018 19:19:49 GMT",
"version": "v2"
}
] | 2018-07-16 | [
[
"Folacci",
"Antoine",
""
],
[
"Hadj",
"Mohamed Ould El",
""
]
] | Electromagnetic radiation emitted by a charged particle plunging from slightly below the innermost stable circular orbit into a Schwarzschild black hole is examined. Both even- and odd-parity electromagnetic perturbations are considered. They are described by using gauge invariant master functions and the regularized m... |
1804.00643 | Ali \"Ovg\"un Dr. | Kimet Jusufi, Ali \"Ovg\"un, Joel Saavedra, P. A. Gonz\'alez and Yerko
V\'asquez | Deflection of light by rotating regular black holes using the
Gauss-Bonnet theorem | 19 pages and 5 figures. Accepted for publication in Physical Review D | Phys. Rev. D 97, 124024 (2018) | 10.1103/PhysRevD.97.124024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the weak gravitational lensing in the spacetime of
rotating regular black hole geometries such as Ayon-Beato-Garc\'ia (ABG),
Bardeen, and Hayward black holes. We calculate the deflection angle of light
using the Gauss-Bonnet theorem (GBT) and show that the deflection of light can
be viewed as ... | [
{
"created": "Mon, 2 Apr 2018 17:42:10 GMT",
"version": "v1"
},
{
"created": "Mon, 28 May 2018 02:15:11 GMT",
"version": "v2"
}
] | 2018-06-12 | [
[
"Jusufi",
"Kimet",
""
],
[
"Övgün",
"Ali",
""
],
[
"Saavedra",
"Joel",
""
],
[
"González",
"P. A.",
""
],
[
"Vásquez",
"Yerko",
""
]
] | In this paper, we study the weak gravitational lensing in the spacetime of rotating regular black hole geometries such as Ayon-Beato-Garc\'ia (ABG), Bardeen, and Hayward black holes. We calculate the deflection angle of light using the Gauss-Bonnet theorem (GBT) and show that the deflection of light can be viewed as a ... |
2403.16363 | Tomoya Tachinami | Tomoya Tachinami and Yuuiti Sendouda | Non-relativistic stellar structure in the Fierz--Pauli theory and
generic linear massive gravity | 17 pages, 9 figures | null | null | null | gr-qc astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the structure of static spherical stars composed of non-relativistic
matter in linear massive gravity with or without the Fierz-Pauli (FP) tuning.
Adopting a polytropic equation of state, we construct master differential
equations for the stellar profile function, which is fourth order in the FP
theory or si... | [
{
"created": "Mon, 25 Mar 2024 01:58:39 GMT",
"version": "v1"
}
] | 2024-03-26 | [
[
"Tachinami",
"Tomoya",
""
],
[
"Sendouda",
"Yuuiti",
""
]
] | We study the structure of static spherical stars composed of non-relativistic matter in linear massive gravity with or without the Fierz-Pauli (FP) tuning. Adopting a polytropic equation of state, we construct master differential equations for the stellar profile function, which is fourth order in the FP theory or sixt... |
1801.00834 | James Edholm | James Edholm | Revealing Infinite Derivative Gravity's true potential: The weak-field
limit around de Sitter backgrounds | 6 pages | Phys. Rev. D 97, 064011 (2018) | 10.1103/PhysRevD.97.064011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity is known to produce singularities in the potential
generated by a point source. Our universe can be modelled as a de Sitter (dS)
metric and we show that ghost-free Infinite Derivative Gravity (IDG) produces a
non-singular potential around a dS background, while returning to the GR
prediction at lar... | [
{
"created": "Tue, 2 Jan 2018 20:59:57 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2018 15:34:56 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Feb 2018 11:38:31 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Feb 2018 13:51:28 GMT",
"version": "v4"
},
{
"creat... | 2018-04-06 | [
[
"Edholm",
"James",
""
]
] | General Relativity is known to produce singularities in the potential generated by a point source. Our universe can be modelled as a de Sitter (dS) metric and we show that ghost-free Infinite Derivative Gravity (IDG) produces a non-singular potential around a dS background, while returning to the GR prediction at large... |
2008.04957 | Sander M. Vermeulen | Sander M Vermeulen, Lorenzo Aiello, Aldo Ejlli, William L Griffiths,
Alasdair L James, Katherine L Dooley, Hartmut Grote | An Experiment for Observing Quantum Gravity Phenomena using Twin
Table-Top 3D Interferometers | Accepted for publication in Classical and Quantum Gravity | null | 10.1088/1361-6382/abe757 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories of quantum gravity based on the holographic principle predict the
existence of quantum fluctuations of distance measurements that accumulate and
exhibit correlations over macroscopic distances. This paper models an expected
signal due to this phenomenology, and details the design and estimated
sensitivity of... | [
{
"created": "Tue, 11 Aug 2020 18:43:59 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Feb 2021 11:19:42 GMT",
"version": "v2"
}
] | 2021-02-19 | [
[
"Vermeulen",
"Sander M",
""
],
[
"Aiello",
"Lorenzo",
""
],
[
"Ejlli",
"Aldo",
""
],
[
"Griffiths",
"William L",
""
],
[
"James",
"Alasdair L",
""
],
[
"Dooley",
"Katherine L",
""
],
[
"Grote",
"Hartmut",
"... | Theories of quantum gravity based on the holographic principle predict the existence of quantum fluctuations of distance measurements that accumulate and exhibit correlations over macroscopic distances. This paper models an expected signal due to this phenomenology, and details the design and estimated sensitivity of c... |
gr-qc/0310034 | Yi Pan | Yi Pan, Alessandra Buonanno, Yanbei Chen, and Michele Vallisneri | A physical template family for gravitational waves from precessing
binaries of spinning compact objects: Application to single-spin binaries | 27 pages, 11 figures; reference added for Sec. 6, typos corrected;
small corrections to GW flux terms as per Blanchet et al., PRD 71,
129902(E)-129904(E) (2005) | Phys.Rev.D69:104017,2004; Erratum-ibid.D74:029905,2006 | 10.1103/PhysRevD.69.104017 10.1103/PhysRevD.74.029905 | null | gr-qc | null | The detection of the gravitational waves (GWs) emitted by precessing binaries
of spinning compact objects is complicated by the large number of parameters
(such as the magnitudes and initial directions of the spins, and the position
and orientation of the binary with respect to the detector) that are required
to mode... | [
{
"created": "Mon, 6 Oct 2003 20:56:58 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Nov 2003 15:16:37 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Jul 2006 15:34:43 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Pan",
"Yi",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Vallisneri",
"Michele",
""
]
] | The detection of the gravitational waves (GWs) emitted by precessing binaries of spinning compact objects is complicated by the large number of parameters (such as the magnitudes and initial directions of the spins, and the position and orientation of the binary with respect to the detector) that are required to model ... |
1611.10198 | Carlos Augusto Romero Filho | R. Avalos, F. Dahia and C. Romero | A note on the problem of proper time in Weyl space-time | 19 pages and 3 figures | Avalos, R., Dahia, F. & Romero, C. Found Phys (2018) 48: 253 | 10.1007/s10701-017-0134-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the question of whether or not a general Weyl structure is a
suitable mathematical model of space-time. This is an issue that has been in
debate since Weyl formulated his unified field theory for the first time. We do
not present the discussion from the point of view of a particular unification
theory, but... | [
{
"created": "Wed, 30 Nov 2016 15:00:21 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Apr 2018 02:32:21 GMT",
"version": "v2"
}
] | 2018-04-09 | [
[
"Avalos",
"R.",
""
],
[
"Dahia",
"F.",
""
],
[
"Romero",
"C.",
""
]
] | We discuss the question of whether or not a general Weyl structure is a suitable mathematical model of space-time. This is an issue that has been in debate since Weyl formulated his unified field theory for the first time. We do not present the discussion from the point of view of a particular unification theory, but i... |
2307.05181 | Yong Tang | Yan Cao, Yong Tang | Signatures of Ultralight Bosons in Compact Binary Inspiral and Outspiral | 17 pages, 10 figures | Phys.Rev.D 108 (2023) 12, 123017 | 10.1103/PhysRevD.108.123017 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Ultralight bosons are well-motivated particles from various physical and
cosmological theories, and can be spontaneously produced during the
superradiant process, forming a dense hydrogen-like cloud around the spinning
black hole. After the growth saturates, the cloud slowly depletes its mass
through gravitational-wa... | [
{
"created": "Tue, 11 Jul 2023 11:33:51 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jan 2024 08:26:38 GMT",
"version": "v2"
}
] | 2024-01-04 | [
[
"Cao",
"Yan",
""
],
[
"Tang",
"Yong",
""
]
] | Ultralight bosons are well-motivated particles from various physical and cosmological theories, and can be spontaneously produced during the superradiant process, forming a dense hydrogen-like cloud around the spinning black hole. After the growth saturates, the cloud slowly depletes its mass through gravitational-wave... |
2112.10430 | Muhammad Zaeem-Ul-Haq Bhatti | M. Z. Bhatti, Z. Yousaf, F. Hussain | Study of Generalized Lema\^{\i}tre-Tolman-Bondi Spacetime in Palatini
$f(R)$ Gravity | 21 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper aims to analyze the generalization of Lema\^{\i}tre-Tolman-Bondi
(LTB) spacetime for dissipative dust under the influence of Palatini $f(R)$
gravity. We explore the modified field equations, kinematical variables, and
mass function in this scenario. We construct Bianchi identities using
conservation and di... | [
{
"created": "Mon, 20 Dec 2021 10:19:38 GMT",
"version": "v1"
}
] | 2021-12-21 | [
[
"Bhatti",
"M. Z.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Hussain",
"F.",
""
]
] | This paper aims to analyze the generalization of Lema\^{\i}tre-Tolman-Bondi (LTB) spacetime for dissipative dust under the influence of Palatini $f(R)$ gravity. We explore the modified field equations, kinematical variables, and mass function in this scenario. We construct Bianchi identities using conservation and diff... |
2211.02958 | Luther Rinehart | Luther Rinehart | Radiation from an accelerating charge in a family of Rindler frames | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The generalization of the Larmor radiation formula in gravitational fields
and with accelerating observers was obtained by Hirayama and others. We verify
a special case of their result by explicit computation using a family of
displaced Rindler frames. We discuss the role of observer-dependence of energy
and simultan... | [
{
"created": "Sat, 5 Nov 2022 18:36:26 GMT",
"version": "v1"
}
] | 2022-11-08 | [
[
"Rinehart",
"Luther",
""
]
] | The generalization of the Larmor radiation formula in gravitational fields and with accelerating observers was obtained by Hirayama and others. We verify a special case of their result by explicit computation using a family of displaced Rindler frames. We discuss the role of observer-dependence of energy and simultanei... |
1508.06543 | Andronikos Paliathanasis | Andronikos Paliathanasis, Supriya Pan and Souvik Pramanik | Scalar field cosmology modified by the Generalized Uncertainty Principle | 12 pages; 3 figures; discussion improved; new references; accepted
for publication by CQG | Class. Quantum Grav. 32 245006 (2015) | 10.1088/0264-9381/32/24/245006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider quintessence scalar field cosmology in which the Lagrangian of
the scalar field is modified by the Generalized Uncertainty Principle. We show
that the perturbation terms which arise from the deformed algebra are
equivalent with the existence of a second scalar field, where the two fields
interact in the k... | [
{
"created": "Mon, 24 Aug 2015 08:27:46 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Oct 2015 22:37:32 GMT",
"version": "v2"
}
] | 2015-12-03 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Pan",
"Supriya",
""
],
[
"Pramanik",
"Souvik",
""
]
] | We consider quintessence scalar field cosmology in which the Lagrangian of the scalar field is modified by the Generalized Uncertainty Principle. We show that the perturbation terms which arise from the deformed algebra are equivalent with the existence of a second scalar field, where the two fields interact in the kin... |
1712.02129 | J. W. van Holten | T. de Beer and J.W. van Holten | Chaplygin gas halos | 18 pages, 9 figures; vs: references added | null | null | Nikhef/2017-062 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unification of dark matter and dark energy as short- and long-range
manifestations of a single cosmological substance is possible in models
described by the generalized Chaplygin gas equation of state. We show it admits
halo-like structures and discuss their density profiles, the resulting
space-time geometry and the... | [
{
"created": "Wed, 6 Dec 2017 11:03:48 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2017 21:56:45 GMT",
"version": "v2"
}
] | 2017-12-20 | [
[
"de Beer",
"T.",
""
],
[
"van Holten",
"J. W.",
""
]
] | Unification of dark matter and dark energy as short- and long-range manifestations of a single cosmological substance is possible in models described by the generalized Chaplygin gas equation of state. We show it admits halo-like structures and discuss their density profiles, the resulting space-time geometry and the r... |
1606.02646 | Vojtech Pravda | Vojtech Pravda, Alena Pravdova, Jiri Podolsky, Robert Svarc | Exact solutions to quadratic gravity | 13 pages, matches the published version | Phys. Rev. D 95, 084025 (2017) | 10.1103/PhysRevD.95.084025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since all Einstein spacetimes are vacuum solutions to quadratic gravity in
four dimensions, in this paper we study various aspects of non-Einstein vacuum
solutions to this theory. Most such known solutions are of traceless Ricci and
Petrov type N with a constant Ricci scalar. Thus we assume the Ricci scalar to
be con... | [
{
"created": "Wed, 8 Jun 2016 17:31:00 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2016 16:19:42 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Apr 2017 13:31:41 GMT",
"version": "v3"
}
] | 2017-04-25 | [
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
],
[
"Podolsky",
"Jiri",
""
],
[
"Svarc",
"Robert",
""
]
] | Since all Einstein spacetimes are vacuum solutions to quadratic gravity in four dimensions, in this paper we study various aspects of non-Einstein vacuum solutions to this theory. Most such known solutions are of traceless Ricci and Petrov type N with a constant Ricci scalar. Thus we assume the Ricci scalar to be const... |
1410.4479 | Javier Olmedo | Rodolfo Gambini, Javier Olmedo, Jorge Pullin | Casimir effect in a quantum space-time | 4 pages | null | 10.1088/0264-9381/32/11/115002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply quantum field theory in quantum space-time techniques to study the
Casimir effect for large spherical shells. As background we use the recently
constructed exact quantum solution for spherically symmetric vacuum space-time
in loop quantum gravity. All calculations are finite and one recovers the usual
result... | [
{
"created": "Thu, 16 Oct 2014 16:07:00 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Pullin",
"Jorge",
""
]
] | We apply quantum field theory in quantum space-time techniques to study the Casimir effect for large spherical shells. As background we use the recently constructed exact quantum solution for spherically symmetric vacuum space-time in loop quantum gravity. All calculations are finite and one recovers the usual results ... |
1907.05516 | Rafael Nunes | Rocco D'Agostino, Rafael C. Nunes | Probing observational bounds on scalar-tensor theories from standard
sirens | 12 pages, 8 figures, 1 table. Matches the version published in PRD | Phys. Rev. D 100, 044041 (2019) | 10.1103/PhysRevD.100.044041 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Standard sirens are the gravitational wave (GW) analog of the astronomical
standard candles, and can provide powerful information about the dynamics of
the Universe. In this work, we simulate a catalog with 1000 standard siren
events from binary neutron star mergers, within the sensitivity predicted for
the third gen... | [
{
"created": "Thu, 11 Jul 2019 22:55:10 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 2019 12:18:35 GMT",
"version": "v2"
}
] | 2019-08-26 | [
[
"D'Agostino",
"Rocco",
""
],
[
"Nunes",
"Rafael C.",
""
]
] | Standard sirens are the gravitational wave (GW) analog of the astronomical standard candles, and can provide powerful information about the dynamics of the Universe. In this work, we simulate a catalog with 1000 standard siren events from binary neutron star mergers, within the sensitivity predicted for the third gener... |
1910.14197 | Yun-Cherng Lin | Yun-Cherng Lin, Michael P. Hobson, Anthony N. Lasenby | Power-counting renormalizable, ghost-and-tachyon-free Poincar\'e gauge
theories | 10 pages | Phys. Rev. D 101, 064038 (2020) | 10.1103/PhysRevD.101.064038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present 48 further examples, in addition to the 10 identified in [1], of
ghost-and-tachyon-free critical cases of parity-conserving Poincar\'e gauge
theories of gravity (PGT$^+$) that are also power-counting renormalizable
(PCR). This is achieved by extending the range of critical cases considered. Of
the new PCR ... | [
{
"created": "Thu, 31 Oct 2019 01:01:34 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Apr 2020 16:19:32 GMT",
"version": "v2"
}
] | 2020-04-24 | [
[
"Lin",
"Yun-Cherng",
""
],
[
"Hobson",
"Michael P.",
""
],
[
"Lasenby",
"Anthony N.",
""
]
] | We present 48 further examples, in addition to the 10 identified in [1], of ghost-and-tachyon-free critical cases of parity-conserving Poincar\'e gauge theories of gravity (PGT$^+$) that are also power-counting renormalizable (PCR). This is achieved by extending the range of critical cases considered. Of the new PCR th... |
1812.05635 | Massimo Giovannini | Massimo Giovannini | Polarized backgrounds of relic gravitons | 11 pages | Phys. Rev. D 99, 083501 (2019) | 10.1103/PhysRevD.99.083501 | CERN-TH-2018-215 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polarizations of the tensor modes of the geometry evolving in
cosmological backgrounds are treated as the components of a bispinor whose
dynamics follows from an appropriate gauge-invariant action. This novel
framework bears a close analogy with the (optical) Jones calculus and leads to
a compact classification o... | [
{
"created": "Thu, 13 Dec 2018 19:07:32 GMT",
"version": "v1"
}
] | 2019-04-10 | [
[
"Giovannini",
"Massimo",
""
]
] | The polarizations of the tensor modes of the geometry evolving in cosmological backgrounds are treated as the components of a bispinor whose dynamics follows from an appropriate gauge-invariant action. This novel framework bears a close analogy with the (optical) Jones calculus and leads to a compact classification of ... |
1408.5306 | Christian Pfeifer | Christian Pfeifer | Radar orthogonality and radar length in Finsler and metric spacetime
geometry | 18 pages, 7 figures, axes label in figures corrected, journal
references added | Phys. Rev. D 90, 064052 (2014) | 10.1103/PhysRevD.90.064052 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The radar experiment connects the geometry of spacetime with an observers
measurement of spatial length. We investigate the radar experiment on Finsler
spacetimes which leads to a general definition of radar orthogonality and radar
length. The directions radar orthogonal to an observer form the spatial equal
time sur... | [
{
"created": "Fri, 22 Aug 2014 14:42:15 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Aug 2014 08:02:10 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Oct 2014 07:43:41 GMT",
"version": "v3"
}
] | 2014-10-08 | [
[
"Pfeifer",
"Christian",
""
]
] | The radar experiment connects the geometry of spacetime with an observers measurement of spatial length. We investigate the radar experiment on Finsler spacetimes which leads to a general definition of radar orthogonality and radar length. The directions radar orthogonal to an observer form the spatial equal time surfa... |
2203.16892 | Sanasam Surendra Singh | Chingtham Sonia, S. Surendra Singh | Dynamical systems of cosmological models for different possibilities of
$G$ and $\rho_{\Lambda}$ | 43 pages, 20 figures | null | 10.1140/epjc/s10052-022-10826-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper deals with the dynamics of spatially flat
Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model with a time
varying cosmological constant $\Lambda$ where $\Lambda$ evolves with the cosmic
time (t) through the Hubble parameter (H). We consider that the model dynamics
has a reflection symmetry... | [
{
"created": "Thu, 31 Mar 2022 09:00:33 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Sonia",
"Chingtham",
""
],
[
"Singh",
"S. Surendra",
""
]
] | The present paper deals with the dynamics of spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model with a time varying cosmological constant $\Lambda$ where $\Lambda$ evolves with the cosmic time (t) through the Hubble parameter (H). We consider that the model dynamics has a reflection symmetry $... |
1510.00301 | Filip Hejda | Filip Hejda and Ji\v{r}\'i Bi\v{c}\'ak | Black Holes and Magnetic Fields | Published in WDS'14 Proceedings of Contributed Papers - Physics (eds.
J. \v{S}afr\'ankov\'a and J. Pavl\r{u}), 48-55, MATFYZPRESS, Prague, 2014.
ISBN 978-80-7378-276-4 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly summarise the basic properties of spacetimes representing
rotating, charged black holes in strong axisymmetric magnetic fields. We
concentrate on extremal cases, for which the horizon surface gravity vanishes.
We investigate their properties by finding simpler spacetimes that exhibit
their geometries near ... | [
{
"created": "Thu, 1 Oct 2015 16:27:48 GMT",
"version": "v1"
}
] | 2015-10-02 | [
[
"Hejda",
"Filip",
""
],
[
"Bičák",
"Jiří",
""
]
] | We briefly summarise the basic properties of spacetimes representing rotating, charged black holes in strong axisymmetric magnetic fields. We concentrate on extremal cases, for which the horizon surface gravity vanishes. We investigate their properties by finding simpler spacetimes that exhibit their geometries near de... |
2307.11158 | Christopher Munna | Christopher Munna | High-order post-Newtonian expansion of the generalized redshift
invariant for eccentric-orbit, equatorial extreme-mass-ratio inspirals with a
spinning primary | 23 pages, 2 figures | null | 10.1103/PhysRevD.108.084012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive new terms in the post-Newtonian (PN) expansion of the generalized
redshift invariant $\langle u^t \rangle_\tau$ for a small body in eccentric,
equatorial orbit about a massive Kerr black hole. The series is computed
analytically using the Teukolsky formalism for first-order black hole
perturbation theory (B... | [
{
"created": "Thu, 20 Jul 2023 18:00:04 GMT",
"version": "v1"
}
] | 2023-11-09 | [
[
"Munna",
"Christopher",
""
]
] | We derive new terms in the post-Newtonian (PN) expansion of the generalized redshift invariant $\langle u^t \rangle_\tau$ for a small body in eccentric, equatorial orbit about a massive Kerr black hole. The series is computed analytically using the Teukolsky formalism for first-order black hole perturbation theory (BHP... |
gr-qc/0312092 | Alexander Gorbatsievich | A.A. Blinkouski, A.K. Gorbatsievich | Some cosmological consequences of the five-dimensional Projective
Unified Field Theory | LaTeX, 12 pages, 1 figure | Grav.Cosmol.7:286-292,2001 | null | null | gr-qc | null | The classical observational cosmological tests (Hubble diagram, count of
sources, etc.) are considered for a homogeneous and isotropic model of the
Universe in the framework of the five-dimensional Projective Unified Field
Theory in which gravitation is described by both space-time curvature and some
hypothetical sca... | [
{
"created": "Fri, 19 Dec 2003 20:27:30 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Dec 2003 20:19:13 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Blinkouski",
"A. A.",
""
],
[
"Gorbatsievich",
"A. K.",
""
]
] | The classical observational cosmological tests (Hubble diagram, count of sources, etc.) are considered for a homogeneous and isotropic model of the Universe in the framework of the five-dimensional Projective Unified Field Theory in which gravitation is described by both space-time curvature and some hypothetical scala... |
gr-qc/0401104 | Pedro Marronetti | P. Marronetti and S. L. Shapiro | Numerical Models of Spin-Orbital Coupling in Neutron Star Binaries | 4 pages, 3 figures. Submitted to the Proceedings of the "X Marcel
Grossmann Meeting on General Relativity" in Rio de Janeiro, Brazil, July
20-26 (2003) | null | 10.1142/9789812704030_0107 | null | gr-qc astro-ph | null | We present a new numerical scheme for solving the initial value problem for
quasiequilibrium binary neutron stars allowing for arbitrary spins. We
construct sequences of circular-orbit binaries of varying separation, keeping
the rest mass and circulation constant along each sequence. The spin angular
frequency of the... | [
{
"created": "Mon, 26 Jan 2004 21:24:59 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Marronetti",
"P.",
""
],
[
"Shapiro",
"S. L.",
""
]
] | We present a new numerical scheme for solving the initial value problem for quasiequilibrium binary neutron stars allowing for arbitrary spins. We construct sequences of circular-orbit binaries of varying separation, keeping the rest mass and circulation constant along each sequence. The spin angular frequency of the s... |
1505.06790 | Adam Rogers | Adam Rogers | Frequency-dependent effects of gravitational lensing within plasma | 10 pages, 6 figures | Monthly Notices of the Royal Astronomical Society, 2015, 451 (1):
4536-4544 | 10.1093/mnras/stv903 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The interaction between refraction from a distribution of inhomogeneous
plasma and gravitational lensing introduces novel effects to the paths of light
rays passing by a massive object. The plasma contributes additional terms to
the equations of motion, and the resulting ray trajectories are
frequency-dependent. Lens... | [
{
"created": "Tue, 26 May 2015 02:03:41 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Rogers",
"Adam",
""
]
] | The interaction between refraction from a distribution of inhomogeneous plasma and gravitational lensing introduces novel effects to the paths of light rays passing by a massive object. The plasma contributes additional terms to the equations of motion, and the resulting ray trajectories are frequency-dependent. Lensin... |
gr-qc/9906060 | Iver H. Brevik | I. Brevik | Self-Screening Hawking Atmosphere in the Presence of a Bulk Viscosity | 12 pages, LaTeX, no figures, minor extensions of the discussion. To
appear in PRD | Phys.Rev.D61:124017,2000 | 10.1103/PhysRevD.61.124017 | null | gr-qc | null | The recent theory of 't Hooft [ Nucl. Phys. Suppl. {\bf 68}, 174 (1998)]
models the black hole as a system endowed with an envelope of matter that obeys
an equation of state in the form $ p=(\gamma -1)\rho$, and acts as a source in
Einstein's equations. The present paper generalizes the 't Hooft theory so as
to take ... | [
{
"created": "Wed, 16 Jun 1999 11:43:33 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Mar 2000 16:19:40 GMT",
"version": "v2"
}
] | 2009-01-14 | [
[
"Brevik",
"I.",
""
]
] | The recent theory of 't Hooft [ Nucl. Phys. Suppl. {\bf 68}, 174 (1998)] models the black hole as a system endowed with an envelope of matter that obeys an equation of state in the form $ p=(\gamma -1)\rho$, and acts as a source in Einstein's equations. The present paper generalizes the 't Hooft theory so as to take in... |
1212.2208 | Mark Israelit | Mark Israelit | Nowadays cosmology with the Weyl-Dirac approach | arXiv admin note: substantial text overlap with arXiv:1008.0767,
arXiv:1212.2025 In this new version the following changes are made: 1. The
terms perturbated/perturbation are deleted as not appropriate. 2. The new
title "Cosmology with the Weyl-Dirac approach." 3. In Sec-s 7-8 are corrected
and added some formu... | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some problems of cosmology: the big bang singularity, the origin of
conventional matter, of dark matter and of dark energy may be successfully
described and treated in the framework of the Weyl-Dirac theory. This theory,
being a minimal expansion of Einstein's GRT, contains in addition to the metric
tensor\g, the Wey... | [
{
"created": "Mon, 10 Dec 2012 15:05:04 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Aug 2013 12:58:39 GMT",
"version": "v2"
}
] | 2013-08-07 | [
[
"Israelit",
"Mark",
""
]
] | Some problems of cosmology: the big bang singularity, the origin of conventional matter, of dark matter and of dark energy may be successfully described and treated in the framework of the Weyl-Dirac theory. This theory, being a minimal expansion of Einstein's GRT, contains in addition to the metric tensor\g, the Weyl ... |
2002.01174 | Piotr T. Chru\'sciel | Robert Beig, Piotr T. Chru\'sciel | On linearised vacuum constraint equations on Einstein manifolds | Minor rewordings, version should be identical to the published one | null | 10.1088/1361-6382/ab81cc | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how to parameterise solutions of the general relativistic vector
constraint equation on Einstein manifolds by unconstrained potentials. We
provide a similar construction for the trace-free part of tensors satisfying
the linearised scalar constraint. Previous work of ours has provided similar
different constru... | [
{
"created": "Tue, 4 Feb 2020 09:09:05 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2020 11:00:21 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Apr 2020 13:41:47 GMT",
"version": "v3"
},
{
"created": "Tue, 21 Apr 2020 18:01:08 GMT",
"version": "v4"
}
] | 2020-12-02 | [
[
"Beig",
"Robert",
""
],
[
"Chruściel",
"Piotr T.",
""
]
] | We show how to parameterise solutions of the general relativistic vector constraint equation on Einstein manifolds by unconstrained potentials. We provide a similar construction for the trace-free part of tensors satisfying the linearised scalar constraint. Previous work of ours has provided similar different construct... |
gr-qc/0504018 | Leonid Grishchuk P | L. P. Grishchuk | Relic Gravitational Waves and Cosmology | 36 pages including 8 figures; expanded version of a talk at the
international conference `Zeldovich-90', Moscow, December 2004;
http://hea.iki.rssi.ru/Z-90; v.2: additional formulas and explanations in
response to remarks of anonymous referee; v.3: extra details about 'scalar'
perturbations and T/S ratio, sched... | Phys.Usp.48:1235-1247,2005 | 10.1070/PU2005v048n12ABEH005795 | null | gr-qc astro-ph hep-ph hep-th | null | This is an expanded version of my talk given at the international conference
"Zeldovich-90". I start with a brief recollection of interactions with
Zeldovich in the context of the study of relic gravitational waves. I then
summarise the principles and early results on the quantum-mechanical generation
of cosmological... | [
{
"created": "Tue, 5 Apr 2005 16:11:52 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jul 2005 15:55:49 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Nov 2005 11:36:56 GMT",
"version": "v3"
},
{
"created": "Sun, 5 Mar 2006 14:32:07 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Grishchuk",
"L. P.",
""
]
] | This is an expanded version of my talk given at the international conference "Zeldovich-90". I start with a brief recollection of interactions with Zeldovich in the context of the study of relic gravitational waves. I then summarise the principles and early results on the quantum-mechanical generation of cosmological p... |
1904.11945 | Miguel Cruz | Miguel Cruz, Samuel Lepe and Gerardo Morales-Navarrete | A thermodynamics revision of Rastall gravity | 11 pages, 2 figures, accepted version in CQG | Class. Quantum Grav. 36, 225007 (2019) | 10.1088/1361-6382/ab45ab | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study some aspects of the Rastall gravity, being the
thermodynamics consistency of the model the core of this paper, for this
purpose we will consider the dynamical equations of Rastall model in a flat
FLRW geometry. Under a holographic description can be seen that this scenario
for gravity contribute... | [
{
"created": "Fri, 26 Apr 2019 17:23:52 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jun 2019 18:42:10 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Oct 2019 18:34:21 GMT",
"version": "v3"
}
] | 2019-10-22 | [
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Morales-Navarrete",
"Gerardo",
""
]
] | In this work we study some aspects of the Rastall gravity, being the thermodynamics consistency of the model the core of this paper, for this purpose we will consider the dynamical equations of Rastall model in a flat FLRW geometry. Under a holographic description can be seen that this scenario for gravity contributes ... |
gr-qc/0010011 | Alessandra Buonanno | Alessandra Buonanno and Yanbei Chen | Optical noise correlations and beating the standard quantum limit in
advanced gravitational-wave detectors | 12 pages, 2 figures; minor changes, some references added | Class.Quant.Grav.18:L95-L101,2001 | 10.1088/0264-9381/18/15/102 | GRP/00/549 | gr-qc quant-ph | null | The uncertainty principle, applied naively to the test masses of a
laser-interferometer gravitational-wave detector, produces a Standard Quantum
Limit (SQL) on the interferometer's sensitivity. It has long been thought that
beating this SQL would require a radical redesign of interferometers. However,
we show that LI... | [
{
"created": "Wed, 4 Oct 2000 04:45:56 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jul 2001 21:18:52 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Buonanno",
"Alessandra",
""
],
[
"Chen",
"Yanbei",
""
]
] | The uncertainty principle, applied naively to the test masses of a laser-interferometer gravitational-wave detector, produces a Standard Quantum Limit (SQL) on the interferometer's sensitivity. It has long been thought that beating this SQL would require a radical redesign of interferometers. However, we show that LIGO... |
2004.00907 | B. V. Ivanov | B.V. Ivanov | Linear and Riccati equations in generating functions for stellar models
in general relativity | accepted for publication in Eur. Phys. J. Plus | Eur. Phys. J. Plus 135 (2020) 377 | 10.1140/epjp/s13360-020-00380-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the expressions for the tangential pressure, the anisotropy
factor and the radial pressure in the Einstein equations may serve as
generating functions for stellar models. The latter can incorporate an equation
of state when the expression for the energy density is also used. Other
generating function... | [
{
"created": "Thu, 2 Apr 2020 09:53:48 GMT",
"version": "v1"
}
] | 2020-04-30 | [
[
"Ivanov",
"B. V.",
""
]
] | It is shown that the expressions for the tangential pressure, the anisotropy factor and the radial pressure in the Einstein equations may serve as generating functions for stellar models. The latter can incorporate an equation of state when the expression for the energy density is also used. Other generating functions ... |
1810.09322 | Fabio Biancalana | Charles W. Robson, Leone Di Mauro Villari and Fabio Biancalana | On the Topological Nature of the Hawking Temperature of Black Holes | Updated version with more relevant references | Phys. Rev. D 99, 044042 (2019) | 10.1103/PhysRevD.99.044042 | null | gr-qc nlin.PS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we determine that the Hawking temperature of black holes
possesses a purely topological nature. We find a very simple but powerful
formula, based on a topological invariant known as the Euler characteristic,
which is able to provide the exact Hawking temperature of any two-dimensional
black hole -- and i... | [
{
"created": "Mon, 22 Oct 2018 14:44:59 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Oct 2018 13:03:06 GMT",
"version": "v2"
}
] | 2019-02-27 | [
[
"Robson",
"Charles W.",
""
],
[
"Villari",
"Leone Di Mauro",
""
],
[
"Biancalana",
"Fabio",
""
]
] | In this work we determine that the Hawking temperature of black holes possesses a purely topological nature. We find a very simple but powerful formula, based on a topological invariant known as the Euler characteristic, which is able to provide the exact Hawking temperature of any two-dimensional black hole -- and in ... |
gr-qc/9303017 | null | Vanda Silveira and M.D. Maia (Universidade de Brasilia) | Topologica Defects and Corrections to the Nambu Action | UNB.FIS.FM-002/92, Marcos@FNAL, 12 pages, Latex | Phys.Lett.A174:280-284,1993 | 10.1016/0375-9601(93)90138-P | null | gr-qc | null | The effective action of a (1+2)-dimensional defect is obtained as an
expansion in powers of the thickness.Considering non-straight solutions as the
zero order term, the corrections to the Nambu action are found to depend on the
curvature scalar and on the gaussian curvature .
| [
{
"created": "Thu, 11 Mar 1993 22:53:08 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Silveira",
"Vanda",
"",
"Universidade de Brasilia"
],
[
"Maia",
"M. D.",
"",
"Universidade de Brasilia"
]
] | The effective action of a (1+2)-dimensional defect is obtained as an expansion in powers of the thickness.Considering non-straight solutions as the zero order term, the corrections to the Nambu action are found to depend on the curvature scalar and on the gaussian curvature . |
1005.2046 | Antoine Klein | Antoine Klein, Philippe Jetzer | Spin effects in the phasing of gravitational waves from binaries on
eccentric orbits | 7 pages, 1 figure; Accepted for publication in Phys. Rev. D | Phys.Rev.D81:124001,2010 | 10.1103/PhysRevD.81.124001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute here the spin-orbit and spin-spin couplings needed for an accurate
computation of the phasing of gravitational waves emitted by comparable-mass
binaries on eccentric orbits at the second post-Newtonian (PN) order. We use a
quasi-Keplerian parametrization of the orbit free of divergencies in the zero
eccent... | [
{
"created": "Wed, 12 May 2010 10:58:47 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Klein",
"Antoine",
""
],
[
"Jetzer",
"Philippe",
""
]
] | We compute here the spin-orbit and spin-spin couplings needed for an accurate computation of the phasing of gravitational waves emitted by comparable-mass binaries on eccentric orbits at the second post-Newtonian (PN) order. We use a quasi-Keplerian parametrization of the orbit free of divergencies in the zero eccentri... |
gr-qc/0208087 | Carlos Palenzuela | C. Bona, T. Ledvinka and C. Palenzuela | A 3+1 covariant suite of Numerical Relativity Evolution Systems | null | Phys.Rev.D66:084013,2002 | 10.1103/PhysRevD.66.084013 | null | gr-qc | null | A suite of three evolution systems is presented in the framework of the 3+1
formalism. The first one is of second order in space derivatives and has the
same causal structure of the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) system
for a suitable choice of parameters. The second one is the standard first order
version... | [
{
"created": "Wed, 28 Aug 2002 15:23:42 GMT",
"version": "v1"
}
] | 2010-05-19 | [
[
"Bona",
"C.",
""
],
[
"Ledvinka",
"T.",
""
],
[
"Palenzuela",
"C.",
""
]
] | A suite of three evolution systems is presented in the framework of the 3+1 formalism. The first one is of second order in space derivatives and has the same causal structure of the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) system for a suitable choice of parameters. The second one is the standard first order version o... |
2111.01298 | Marcelo Byrro Ribeiro | Osvaldo L. Santos-Pereira, Everton M. C. Abreu, Marcelo B. Ribeiro | Warp drive dynamic solutions considering different fluid sources | 16 pages, 4 tables, LaTeX. To appear in the Proceedings of the 16th
Marcel Grossmann Meeting (July 5-10, 2021) | Proc. 16th Marcel Grossmann Meeting on General Relativity (5-10
July 2021) - Part A; R. Ruffini & G. Vereshchagin (eds), pp. 840-855.
Singapore: World Scientific, (2023) | 10.1142/9789811269776_0066 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Alcubierre proposed in 1994 that the well known special relativistic
limitation that particles cannot travel with velocities bigger than the light
speed can be bypassed when such trips are considered globally within specific
general relativistic frameworks. Although initial results indicated this
scenario as being un... | [
{
"created": "Mon, 1 Nov 2021 23:47:50 GMT",
"version": "v1"
}
] | 2023-01-31 | [
[
"Santos-Pereira",
"Osvaldo L.",
""
],
[
"Abreu",
"Everton M. C.",
""
],
[
"Ribeiro",
"Marcelo B.",
""
]
] | Alcubierre proposed in 1994 that the well known special relativistic limitation that particles cannot travel with velocities bigger than the light speed can be bypassed when such trips are considered globally within specific general relativistic frameworks. Although initial results indicated this scenario as being unph... |
1512.09259 | Dragoljub Dimitrijevic | Dragoljub D. Dimitrijevic, Goran S. Djordjevic and Milan Milosevic | Classicalization and Quantization of Tachyon-like Matter on
(non)Archimedean Spaces | null | Romanian Reports in Physics, Volume 68, Number 1, 2016 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a class of tachyon-like potentials, inspired by string theory,
D-brane dynamics and cosmology in the context of classical and quantum
mechanics. Motivated by the trans-Plankcian problem in the very early stage of
cosmological evolution of the Universe, we consider the theoretical role of
DBI-type tachyon ... | [
{
"created": "Thu, 31 Dec 2015 11:17:40 GMT",
"version": "v1"
}
] | 2016-01-01 | [
[
"Dimitrijevic",
"Dragoljub D.",
""
],
[
"Djordjevic",
"Goran S.",
""
],
[
"Milosevic",
"Milan",
""
]
] | We consider a class of tachyon-like potentials, inspired by string theory, D-brane dynamics and cosmology in the context of classical and quantum mechanics. Motivated by the trans-Plankcian problem in the very early stage of cosmological evolution of the Universe, we consider the theoretical role of DBI-type tachyon sc... |
2204.01015 | Salvatore Capozziello | Salvatore Capozziello and Rocco D'Agostino | Model-independent reconstruction of $f(Q)$ non-metric gravity | 6 pages, 2 figures, accepted for publication in Physics Letters B | null | 10.1016/j.physletb.2022.137229 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider gravity mediated by non-metricity, with vanishing curvature and
torsion. The gravitational action, including an arbitrary function of the
non-metric scalar, is investigated in view of characterizing the dark energy
effects. In particular, we present a method to reconstruct the $f(Q)$ action
without resort... | [
{
"created": "Sun, 3 Apr 2022 07:29:54 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jun 2022 10:54:49 GMT",
"version": "v2"
}
] | 2022-07-13 | [
[
"Capozziello",
"Salvatore",
""
],
[
"D'Agostino",
"Rocco",
""
]
] | We consider gravity mediated by non-metricity, with vanishing curvature and torsion. The gravitational action, including an arbitrary function of the non-metric scalar, is investigated in view of characterizing the dark energy effects. In particular, we present a method to reconstruct the $f(Q)$ action without resortin... |
2003.04304 | Gabriele Gionti S.J. | Gabriele Gionti, S.J | Canonical Analysis of Brans-Dicke Theory Addresses Hamiltonian
Inequivalence between Jordan and Einstein Frames | Revised version PRD accepted. 8 pages, Article, latex. Detailed
calculations added. Typo corrected | Phys. Rev. D 103, 024022 (2021) | 10.1103/PhysRevD.103.024022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Jordan and Einstein frame are studied under the light of Hamiltonian
formalism. Dirac's constraint theory for Hamiltonian systems is applied to
Brans-Dicke theory in the Jordan Frame. In both Jordan and Einstein frame,
Brans-Dicke theory has four secondary first class constraints and their
constraint algebra is close... | [
{
"created": "Fri, 6 Mar 2020 19:18:23 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Mar 2020 12:04:14 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Sep 2020 15:03:59 GMT",
"version": "v3"
},
{
"created": "Mon, 23 Nov 2020 08:47:45 GMT",
"version": "v4"
},
{
"cr... | 2021-01-20 | [
[
"Gionti",
"Gabriele",
""
],
[
"J",
"S.",
""
]
] | Jordan and Einstein frame are studied under the light of Hamiltonian formalism. Dirac's constraint theory for Hamiltonian systems is applied to Brans-Dicke theory in the Jordan Frame. In both Jordan and Einstein frame, Brans-Dicke theory has four secondary first class constraints and their constraint algebra is closed.... |
1502.05905 | Alfred Molina | J. Mart\'in, A. Molina and E. Ruiz | Perturbation theory and harmonic gauge propagation in general
relativity, a particular example | 19 pages, 0 figures | null | 10.1007/s10714-015-1947-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how the changes of coordinates between the class of harmonic
coordinates affect the analitycal solutions of Einstein's equations and we
apply it to an analytical approach for stationary and axisymmetric solutions of
Einstein equation used by the authors \cite{cmmr}, \cite{cugmmr} to solve the
problem of a se... | [
{
"created": "Fri, 20 Feb 2015 15:34:18 GMT",
"version": "v1"
}
] | 2015-09-23 | [
[
"Martín",
"J.",
""
],
[
"Molina",
"A.",
""
],
[
"Ruiz",
"E.",
""
]
] | We study how the changes of coordinates between the class of harmonic coordinates affect the analitycal solutions of Einstein's equations and we apply it to an analytical approach for stationary and axisymmetric solutions of Einstein equation used by the authors \cite{cmmr}, \cite{cugmmr} to solve the problem of a self... |
2302.12158 | Andrea Miani | Andrea Miani, Claudia Lazzaro, Giovanni Andrea Prodi, Shubhanshu
Tiwari, Marco Drago, Edoardo Milotti, Gabriele Vedovato | Constraints on the amplitude of gravitational wave echoes from black
hole ring-down using minimal assumptions | 16 pages, 11 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave echoes may appear following a compact binary coalescence
if the remnant is an "exotic compact object" (ECO). ECOs are proposed
alternatives to the black holes of Einstein's general relativity theory and are
predicted to possess reflective boundaries. This work reports a search for
gravitational wav... | [
{
"created": "Thu, 23 Feb 2023 16:43:25 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2023 11:07:56 GMT",
"version": "v2"
}
] | 2023-07-07 | [
[
"Miani",
"Andrea",
""
],
[
"Lazzaro",
"Claudia",
""
],
[
"Prodi",
"Giovanni Andrea",
""
],
[
"Tiwari",
"Shubhanshu",
""
],
[
"Drago",
"Marco",
""
],
[
"Milotti",
"Edoardo",
""
],
[
"Vedovato",
"Gabriele",
"... | Gravitational wave echoes may appear following a compact binary coalescence if the remnant is an "exotic compact object" (ECO). ECOs are proposed alternatives to the black holes of Einstein's general relativity theory and are predicted to possess reflective boundaries. This work reports a search for gravitational wave ... |
1611.07586 | Amare Abebe | Amare Abebe, Peter K.S. Dunsby, Deon Solomons | Integrability conditions of quasi-Newtonian cosmologies in modified
gravity | 13 pages, no figures | Int. J. Mod. Phys. D Vol. 26 (2017) 1750054 | 10.1142/S0218271817500547 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the integrability conditions of a class of shear-free
perfect-fluid cosmological models within the framework of anisotropic fluid
sources, applying our results to f(R) dark energy models. Generalising earlier
general relativistic results for time-like geodesics, we extend the potential
and acceleration... | [
{
"created": "Wed, 23 Nov 2016 00:03:52 GMT",
"version": "v1"
}
] | 2016-11-24 | [
[
"Abebe",
"Amare",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Solomons",
"Deon",
""
]
] | We investigate the integrability conditions of a class of shear-free perfect-fluid cosmological models within the framework of anisotropic fluid sources, applying our results to f(R) dark energy models. Generalising earlier general relativistic results for time-like geodesics, we extend the potential and acceleration t... |
1711.09891 | Saumya Ghosh | Saumya Ghosh, Sunandan Gangopadhyay, Prasanta K. Panigrahi | Scalar-metric quantum cosmology with Chaplygin gas and perfect fluid | 8 pages LateX | null | 10.1140/epjc/s10052-018-5521-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the flat FRW cosmology with a scalar field coupled
with the metric along with generalized Chaplygin gas and perfect fluid
comprising the matter sector. We use the Schutz's formalism to deal with the
generalized Chaplygin gas sector. The full theory is then quantized canonically
using the Whe... | [
{
"created": "Mon, 27 Nov 2017 10:33:38 GMT",
"version": "v1"
}
] | 2018-02-14 | [
[
"Ghosh",
"Saumya",
""
],
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Panigrahi",
"Prasanta K.",
""
]
] | In this paper we consider the flat FRW cosmology with a scalar field coupled with the metric along with generalized Chaplygin gas and perfect fluid comprising the matter sector. We use the Schutz's formalism to deal with the generalized Chaplygin gas sector. The full theory is then quantized canonically using the Wheel... |
1605.09286 | Emanuele Berti | Emanuele Berti, Alberto Sesana, Enrico Barausse, Vitor Cardoso,
Krzysztof Belczynski | Spectroscopy of Kerr black holes with Earth- and space-based
interferometers | 3 figures; small changes to match version published in Physical
Review Letters | Phys. Rev. Lett. 117, 101102 (2016) | 10.1103/PhysRevLett.117.101102 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We estimate the potential of present and future interferometric
gravitational-wave detectors to test the Kerr nature of black holes through
"gravitational spectroscopy," i.e. the measurement of multiple quasinormal mode
frequencies from the remnant of a black hole merger. Using population synthesis
models of the form... | [
{
"created": "Mon, 30 May 2016 15:42:15 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2016 00:06:22 GMT",
"version": "v2"
}
] | 2016-09-07 | [
[
"Berti",
"Emanuele",
""
],
[
"Sesana",
"Alberto",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Belczynski",
"Krzysztof",
""
]
] | We estimate the potential of present and future interferometric gravitational-wave detectors to test the Kerr nature of black holes through "gravitational spectroscopy," i.e. the measurement of multiple quasinormal mode frequencies from the remnant of a black hole merger. Using population synthesis models of the format... |
gr-qc/9610073 | null | Alexandr K. Guts, Egor B. Grinkevich | Toposes in General Theory of Relativity | 13 pages, LATEX, email guts@univer.omsk.su, grinkev@univer.omsk.su | null | null | null | gr-qc | null | We study in this paper different topos-theoretical approaches to the problem
of construction of General Theory of Relativity. In general case the resulting
space-time theory will be non-classical, different from that of the usual
Einstein theory of space-time. This is a new theory of space-time, created in a
purely l... | [
{
"created": "Thu, 31 Oct 1996 14:18:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Guts",
"Alexandr K.",
""
],
[
"Grinkevich",
"Egor B.",
""
]
] | We study in this paper different topos-theoretical approaches to the problem of construction of General Theory of Relativity. In general case the resulting space-time theory will be non-classical, different from that of the usual Einstein theory of space-time. This is a new theory of space-time, created in a purely log... |
1801.06392 | Mart\'in G. Richarte MR | G.M.Kremer, M.G. Richarte, F. Teston | Jeans Instability in a Universe with Dissipation | 17pp, 5 figures.Phys. Rev. D 97, 023515 (2018) | null | 10.1103/PhysRevD.97.023515 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of Jeans gravitational instability is investigated for static and
expanding universes within the context of the five and thirteen field theories
which account for viscous and thermal effects. For the five-field theory a
general dispersion relation has been derived with the help of relevant
linearized pert... | [
{
"created": "Fri, 19 Jan 2018 13:14:51 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2018 14:10:30 GMT",
"version": "v2"
}
] | 2018-01-23 | [
[
"Kremer",
"G. M.",
""
],
[
"Richarte",
"M. G.",
""
],
[
"Teston",
"F.",
""
]
] | The problem of Jeans gravitational instability is investigated for static and expanding universes within the context of the five and thirteen field theories which account for viscous and thermal effects. For the five-field theory a general dispersion relation has been derived with the help of relevant linearized pertur... |
1607.02315 | Jose Luis Hernandez-Pastora | J.L. Hernandez-Pastora, L. Herrera and J. Martin | Axially symmetric static sources of gravitational field | 17 pages, 13 figures and 3 tables, typos corrected, published in CQG:
Class. Quantum Grav. 33, 235005, (2016) | null | 10.1088/0264-9381/33/23/235005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general procedure to find static and axially symmetric, interior solutions
to the Einstein equations is presented. All the so obtained solutions, verify
the energy conditions for a wide range of values of the parameters, and match
smoothly to some exterior solution of the Weyl family, thereby representing
globally ... | [
{
"created": "Fri, 8 Jul 2016 11:10:01 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Oct 2016 06:46:10 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Nov 2016 08:01:33 GMT",
"version": "v3"
}
] | 2016-11-07 | [
[
"Hernandez-Pastora",
"J. L.",
""
],
[
"Herrera",
"L.",
""
],
[
"Martin",
"J.",
""
]
] | A general procedure to find static and axially symmetric, interior solutions to the Einstein equations is presented. All the so obtained solutions, verify the energy conditions for a wide range of values of the parameters, and match smoothly to some exterior solution of the Weyl family, thereby representing globally re... |
1805.10650 | Helei Liu | B. Eslam Panah and H.L. Liu | White dwarfs in de Rham-Gabadadze-Tolley like massive gravity | 13 pages, 7 figures and 4 tables | Phys. Rev. D 99, 104074 (2019) | 10.1103/PhysRevD.99.104074 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of possible massive white dwarfs more than the Chandrasekhar
limit ($1.45M_{\odot }$, in which $M_{\odot }$ is mass of the sun) is a
challenging topic. In this regard and motivated by the important effect of
massive graviton on the structure of white dwarfs we study the white dwarfs in
Vegh's massive gr... | [
{
"created": "Sun, 27 May 2018 16:41:52 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Oct 2018 15:29:37 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Oct 2018 09:37:44 GMT",
"version": "v3"
},
{
"created": "Thu, 30 May 2019 17:09:19 GMT",
"version": "v4"
},
{
"c... | 2019-06-05 | [
[
"Panah",
"B. Eslam",
""
],
[
"Liu",
"H. L.",
""
]
] | The existence of possible massive white dwarfs more than the Chandrasekhar limit ($1.45M_{\odot }$, in which $M_{\odot }$ is mass of the sun) is a challenging topic. In this regard and motivated by the important effect of massive graviton on the structure of white dwarfs we study the white dwarfs in Vegh's massive grav... |
1405.0667 | Behnam Pourhassan | B. Pourhassan, E.O. Kahya | FRW cosmology with the extended Chaplygin gas | 20 pages | Advances in High Energy PhysicsVolume 2014 (2014) Article ID
231452 | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we propose extended Chaplygin gas equation of state for which
it recovers barotropic fluid with quadratic equation of state. We use numerical
method to investigate the behavior of some cosmological parameters such as
scale factor, Hubble expansion parameter, energy density and deceleration
parameter. W... | [
{
"created": "Sun, 4 May 2014 09:00:52 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Aug 2014 07:15:30 GMT",
"version": "v2"
}
] | 2014-09-17 | [
[
"Pourhassan",
"B.",
""
],
[
"Kahya",
"E. O.",
""
]
] | In this paper, we propose extended Chaplygin gas equation of state for which it recovers barotropic fluid with quadratic equation of state. We use numerical method to investigate the behavior of some cosmological parameters such as scale factor, Hubble expansion parameter, energy density and deceleration parameter. We ... |
2306.09181 | Seyed Ali Hosseini Mansoori | Seyed Ali Hosseini Mansoori, Fereshteh Felegary, Mahmood Roshan, Ozgur
Akarsu, Mohammad Sami | $\mathbb{T}^{2}$- inflation: Sourced by energy-momentum squared gravity | 25 pages, 4 figures, and 2 tables, added discussion, accepted by
Physics of the Dark Universe | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we examine chaotic inflation within the context of the
energy-momentum squared gravity (EMSG) focusing on the energy-momentum powered
gravity (EMPG) that incorporates the functional $f(\mathbb{T}^2)\propto
(\mathbb{T}^2)^{\beta}$ in the Einstein-Hilbert action, in which $\beta$ is a
constant and $\math... | [
{
"created": "Thu, 15 Jun 2023 15:02:26 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Oct 2023 04:31:35 GMT",
"version": "v2"
}
] | 2023-10-20 | [
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Felegary",
"Fereshteh",
""
],
[
"Roshan",
"Mahmood",
""
],
[
"Akarsu",
"Ozgur",
""
],
[
"Sami",
"Mohammad",
""
]
] | In this paper, we examine chaotic inflation within the context of the energy-momentum squared gravity (EMSG) focusing on the energy-momentum powered gravity (EMPG) that incorporates the functional $f(\mathbb{T}^2)\propto (\mathbb{T}^2)^{\beta}$ in the Einstein-Hilbert action, in which $\beta$ is a constant and $\mathbb... |
2009.10212 | Bangalore Sathyaprakash | B.F. Schutz and B.S. Sathyaprakash | Self-calibration of Networks of Gravitational Wave Detectors | 14 pages including references | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | As LIGO and Virgo are upgraded, improving calibration systems to keep pace
with the anticipated signal-to-noise enhancements will be challenging. We
explore here a calibration method that uses astronomical signals, namely
inspiral signals from compact-object binaries, and we show that it can in
principle enable calib... | [
{
"created": "Mon, 21 Sep 2020 23:05:39 GMT",
"version": "v1"
}
] | 2020-09-23 | [
[
"Schutz",
"B. F.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | As LIGO and Virgo are upgraded, improving calibration systems to keep pace with the anticipated signal-to-noise enhancements will be challenging. We explore here a calibration method that uses astronomical signals, namely inspiral signals from compact-object binaries, and we show that it can in principle enable calibra... |
gr-qc/0310043 | Vladimir Ivashchuk | H. Dehnen and V.D. Ivashchuk | On spherically symmetric solutions with horizon in model with
multicomponent anisotropic fluid | 16 pages, no figures | J.Math.Phys.45:4726-4736,2004 | 10.1063/1.1812357 | IGC-PFUR-09/2003 | gr-qc astro-ph hep-th | null | A family of spherically symmetric solutions in the model with m-component
anisotropic fluid is considered. The metric of the solution depends on
parameters q_s, s = 1,...,m, relating radial pressures and the densities and
contains (n -1)m parameters corresponding to Ricci-flat "internal space"
metrics and obeying cer... | [
{
"created": "Tue, 7 Oct 2003 16:12:46 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Dehnen",
"H.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | A family of spherically symmetric solutions in the model with m-component anisotropic fluid is considered. The metric of the solution depends on parameters q_s, s = 1,...,m, relating radial pressures and the densities and contains (n -1)m parameters corresponding to Ricci-flat "internal space" metrics and obeying certa... |
gr-qc/0110109 | Bahram Mashhoon | C. Chicone and B. Mashhoon | Acceleration-induced nonlocality: kinetic memory versus dynamic memory | LaTeX file, 6 PS figures, 34 pages | Annalen Phys. 11 (2002) 309-332 | 10.1002/1521-3889(200204)11:4<309::AID-ANDP309>3.0.CO;2-A | null | gr-qc | null | The characteristics of the memory of accelerated motion in Minkowski
spacetime are discussed within the framework of the nonlocal theory of
accelerated observers. Two types of memory are distinguished: kinetic and
dynamic. We show that only kinetic memory is acceptable, since dynamic memory
leads to divergences for n... | [
{
"created": "Wed, 24 Oct 2001 22:07:26 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | The characteristics of the memory of accelerated motion in Minkowski spacetime are discussed within the framework of the nonlocal theory of accelerated observers. Two types of memory are distinguished: kinetic and dynamic. We show that only kinetic memory is acceptable, since dynamic memory leads to divergences for non... |
1707.09289 | Tanguy Marchand | Tanguy Marchand, Laura Bernard, Luc Blanchet, Guillaume Faye | Ambiguity-Free Completion of the Equations of Motion of Compact Binary
Systems at the Fourth Post-Newtonian Order | 6 pages | Phys. Rev. D 97, 044023 (2018) | 10.1103/PhysRevD.97.044023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first complete (i.e., ambiguity-free) derivation of the
equations of motion of two non-spinning compact objects up to the 4PN order,
based on the Fokker action of point particles in harmonic coordinates. The last
ambiguity parameter is determined from first principle, by resorting to a
matching between... | [
{
"created": "Fri, 28 Jul 2017 15:46:55 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2018 15:56:56 GMT",
"version": "v2"
}
] | 2018-03-12 | [
[
"Marchand",
"Tanguy",
""
],
[
"Bernard",
"Laura",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Faye",
"Guillaume",
""
]
] | We present the first complete (i.e., ambiguity-free) derivation of the equations of motion of two non-spinning compact objects up to the 4PN order, based on the Fokker action of point particles in harmonic coordinates. The last ambiguity parameter is determined from first principle, by resorting to a matching between t... |
1708.04857 | Abhik Kumar Sanyal Dr. | Abhik Kumar Sanyal and Subhra Debnath | Thermodynamics of irreversible particle creation phenomena and its
cosmological consequence | 28 pages, 3 figures, To appear in 'CFD Technics and Thermo-Mechanics
Applications', Springer, Chapter - N0 | Sanyal A.K., Debnath S. (2018) Thermodynamics of Irreversible
Particle Creation Phenomena and Its Cosmological Consequence. In: Driss Z.,
Necib B., Zhang HC. (eds) Thermo-Mechanics Applications and Engineering
Technology pp 171-198. Springer, Cham | 10.1007/978-3-319-70957-4_8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of particle creation phenomena at the expense of the gravitational
field is of great research interest. It might solve the cosmological puzzle
single-handedly, without the need for either dark energy or the modified theory
of gravity. In the early universe, following graceful exit from inflationary
phase, i... | [
{
"created": "Wed, 16 Aug 2017 12:27:42 GMT",
"version": "v1"
}
] | 2018-06-26 | [
[
"Sanyal",
"Abhik Kumar",
""
],
[
"Debnath",
"Subhra",
""
]
] | The study of particle creation phenomena at the expense of the gravitational field is of great research interest. It might solve the cosmological puzzle single-handedly, without the need for either dark energy or the modified theory of gravity. In the early universe, following graceful exit from inflationary phase, it ... |
gr-qc/0608083 | Farook Rahaman | F. Rahaman, N. Begum, G. Bag, B. C. Bhui | Cosmological models with negative constant deceleration parameter in
Lyra geometry | 8 pages | Astrophys.Space Sci. 299 (2005) 211-218 | 10.1007/s10509-005-5943-4 | null | gr-qc | null | Bermann [ Nuovo Cimento B (1983), 74, 182 ] presented a law of variation of
Hubble parameter that yields constant deceleration parameter models of the
Universe. In this paper, we study some cosmological models with negative
constant deceleration parameter within the framework of Lyra geometry.
| [
{
"created": "Thu, 17 Aug 2006 11:30:42 GMT",
"version": "v1"
}
] | 2016-04-26 | [
[
"Rahaman",
"F.",
""
],
[
"Begum",
"N.",
""
],
[
"Bag",
"G.",
""
],
[
"Bhui",
"B. C.",
""
]
] | Bermann [ Nuovo Cimento B (1983), 74, 182 ] presented a law of variation of Hubble parameter that yields constant deceleration parameter models of the Universe. In this paper, we study some cosmological models with negative constant deceleration parameter within the framework of Lyra geometry. |
0812.4063 | Salvatore Capozziello | S. Capozziello, M. De Laurentis, F. Garufi, and L. Milano | Relativistic orbits with gravitomagnetic corrections | 16 pages, 5 figures | Phys.Scripta 79:025901,2009 | 10.1088/0031-8949/79/02/025901 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Corrections to the relativistic orbits are studied considering higher order
approximations induced by gravitomagnetic effects. We discuss in details how
such corrections come out taking into account magnetic components in the weak
field limit of gravitational field and then the theory of orbits is developed
starting ... | [
{
"created": "Sat, 20 Dec 2008 14:12:07 GMT",
"version": "v1"
}
] | 2009-03-12 | [
[
"Capozziello",
"S.",
""
],
[
"De Laurentis",
"M.",
""
],
[
"Garufi",
"F.",
""
],
[
"Milano",
"L.",
""
]
] | Corrections to the relativistic orbits are studied considering higher order approximations induced by gravitomagnetic effects. We discuss in details how such corrections come out taking into account magnetic components in the weak field limit of gravitational field and then the theory of orbits is developed starting fr... |
2011.02938 | Kent Yagi | Zack Carson and Kent Yagi | Testing General Relativity with Gravitational Waves | v1: Submitted as a chapter in "Handbook of Gravitational Wave
Astronomy" (Eds. C. Bambi, S. Katsanevas and K. Kokkotas; Springer Singapore,
2021). The maximum number of allowed references is used; v2, v3: minor
corrections to refs | null | 10.1007/978-981-15-4702-7_41-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave sources offer us unique testbeds for probing strong-field,
dynamical and nonlinear aspects of gravity. In this chapter, we give a brief
overview of the current status and future prospects of testing General
Relativity with gravitational waves. In particular, we focus on three
theory-agnostic tests ... | [
{
"created": "Thu, 5 Nov 2020 16:04:49 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jan 2021 23:45:52 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Nov 2021 23:59:27 GMT",
"version": "v3"
}
] | 2021-11-15 | [
[
"Carson",
"Zack",
""
],
[
"Yagi",
"Kent",
""
]
] | Gravitational-wave sources offer us unique testbeds for probing strong-field, dynamical and nonlinear aspects of gravity. In this chapter, we give a brief overview of the current status and future prospects of testing General Relativity with gravitational waves. In particular, we focus on three theory-agnostic tests (p... |
2110.09033 | Jin Qiao | Jin Qiao, Tao Zhu, Guoliang Li, Wen Zhao | Post-Newtonian parameters of ghost-free parity-violating gravities | 20 pages, 1 figure | JCAP 04(2022)054 | 10.1088/1475-7516/2022/04/054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the slow-motion and weak-field approximation of the general
ghost-free parity-violating (PV) theory of gravity in the parametrized
post-Newtonian (PPN) framework and derive the perturbative field equations,
which are modified by the PV terms of this theory. The complete PPN parameters
are obtained by s... | [
{
"created": "Mon, 18 Oct 2021 06:11:01 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jan 2022 02:06:51 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Apr 2022 06:42:36 GMT",
"version": "v3"
}
] | 2022-05-04 | [
[
"Qiao",
"Jin",
""
],
[
"Zhu",
"Tao",
""
],
[
"Li",
"Guoliang",
""
],
[
"Zhao",
"Wen",
""
]
] | We investigate the slow-motion and weak-field approximation of the general ghost-free parity-violating (PV) theory of gravity in the parametrized post-Newtonian (PPN) framework and derive the perturbative field equations, which are modified by the PV terms of this theory. The complete PPN parameters are obtained by sol... |
2401.16814 | Phongpichit Channuie | Piyachat Panyasiripan (Walailak U.), Narakorn Kaewkhao (Prince Songkla
U.), Phongpichit Channuie (Walailak U.), Ali \"Ovg\"un (Eastern Mediterranean
U.) | Traversable Wormholes in Minimally Geometrical Deformed Trace-Free
Gravity using Gravitational Decoupling | v1: 24 pages, many figures | Nucl. Phys. B 1004 (2024) 116563 | 10.1016/j.nuclphysb.2024.116563 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we investigate wormhole solutions through the utilization of
gravitational decoupling, employing the Minimal Geometric Deformation (MGD)
procedure within the framework of Trace-Free Gravity. We base our investigation
on static and spherically symmetric Morris-Thorne traversable wormholes,
considering bo... | [
{
"created": "Tue, 30 Jan 2024 08:28:18 GMT",
"version": "v1"
}
] | 2024-05-17 | [
[
"Panyasiripan",
"Piyachat",
"",
"Walailak U."
],
[
"Kaewkhao",
"Narakorn",
"",
"Prince Songkla\n U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
],
[
"Övgün",
"Ali",
"",
"Eastern Mediterranean\n U."
]
] | In this work, we investigate wormhole solutions through the utilization of gravitational decoupling, employing the Minimal Geometric Deformation (MGD) procedure within the framework of Trace-Free Gravity. We base our investigation on static and spherically symmetric Morris-Thorne traversable wormholes, considering both... |
gr-qc/0502039 | Clifford M. Will | Clifford M. Will (Institut d'Astrophysique de Paris and Washington
University) | Post-Newtonian gravitational radiation and equations of motion via
direct integration of the relaxed Einstein equations. III. Radiation reaction
for binary systems with spinning bodies | 19 pages, small corrections, equivalent to published version | Phys.Rev. D71 (2005) 084027 | 10.1103/PhysRevD.71.084027 | null | gr-qc | null | Using post-Newtonian equations of motion for fluid bodies that include
radiation-reaction terms at 2.5 and 3.5 post-Newtonian (PN) order (O[(v/c)^5]
and O[(v/c)^7] beyond Newtonian order), we derive the equations of motion for
binary systems with spinning bodies. In particular we determine the effects of
radiation-re... | [
{
"created": "Wed, 9 Feb 2005 20:19:52 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Apr 2005 19:51:26 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Will",
"Clifford M.",
"",
"Institut d'Astrophysique de Paris and Washington\n University"
]
] | Using post-Newtonian equations of motion for fluid bodies that include radiation-reaction terms at 2.5 and 3.5 post-Newtonian (PN) order (O[(v/c)^5] and O[(v/c)^7] beyond Newtonian order), we derive the equations of motion for binary systems with spinning bodies. In particular we determine the effects of radiation-reac... |
gr-qc/9912077 | Konstantina Savvidou | Ntina Savvidou, Charis Anastopoulos | Histories quantisation of parameterised systems: I. Development of a
general algorithm | 34 pages, Latex | Class.Quant.Grav. 17 (2000) 2463-2490 | 10.1088/0264-9381/17/13/301 | null | gr-qc quant-ph | null | We develop a new algorithm for the quantisation of systems with first-class
constraints. Our approach lies within the (History Projection Operator)
continuous-time histories quantisation programme. In particular, the
Hamiltonian treatment (either classical or quantum) of parameterised systems is
characterised by the ... | [
{
"created": "Fri, 17 Dec 1999 21:40:52 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Savvidou",
"Ntina",
""
],
[
"Anastopoulos",
"Charis",
""
]
] | We develop a new algorithm for the quantisation of systems with first-class constraints. Our approach lies within the (History Projection Operator) continuous-time histories quantisation programme. In particular, the Hamiltonian treatment (either classical or quantum) of parameterised systems is characterised by the lo... |
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