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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1505.07441 | Steven Carlip | S. Carlip | Can gravitational microlensing by vacuum fluctuations be observed? | 8 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the prospect is more plausible than it might appear, the answer to
the title question is, unfortunately, "probably not." Quantum fluctuations of
vacuum energy can focus light, and while the effect is tiny, the distribution
of fluctuations is highly non-Gaussian, offering hope that relatively rare
"large" flu... | [
{
"created": "Wed, 27 May 2015 19:28:05 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Carlip",
"S.",
""
]
] | Although the prospect is more plausible than it might appear, the answer to the title question is, unfortunately, "probably not." Quantum fluctuations of vacuum energy can focus light, and while the effect is tiny, the distribution of fluctuations is highly non-Gaussian, offering hope that relatively rare "large" fluct... |
0906.3806 | Kourosh Nozari | Kourosh Nozari and Faeze Kiani | Dynamical-Screening and the Phantom-Like Effects in a DGP-Inspired
$F(R,\phi)$ Model | 21 pages, 8 eps figures, to appear in JCAP | JCAP 0907:010,2009 | 10.1088/1475-7516/2009/07/010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Lue-Starkman conjecture on the dynamical screening of the brane
cosmological constant in the DGP scenario, we extend this proposal to a general
DGP-inspired $F(R,\phi)$ Model. We show that modification of the induced
gravity and its coupling to a quintessence field localized on the brane,
affects the scr... | [
{
"created": "Sat, 20 Jun 2009 12:57:12 GMT",
"version": "v1"
}
] | 2009-09-24 | [
[
"Nozari",
"Kourosh",
""
],
[
"Kiani",
"Faeze",
""
]
] | Based on the Lue-Starkman conjecture on the dynamical screening of the brane cosmological constant in the DGP scenario, we extend this proposal to a general DGP-inspired $F(R,\phi)$ Model. We show that modification of the induced gravity and its coupling to a quintessence field localized on the brane, affects the scree... |
1511.04418 | Abhijit Mandal | Abhijit Mandal and Ritabrata Biswas | Quantum Corrected Schwarzschild Black Hole: Inner Horizon Thermodynamic
Behaviors | 7 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1511.00653; text overlap with arXiv:gr-qc/9704072 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic properties of Cauchy horizon is a matter of interest. Event
horizon and Cauchy horizon together can enlighten us about the micro-states of
a black hole. In addition, if we consider a black hole metric modified with
quantum terms, which is not forcing the geodesics to focus at a singularity,
the stud... | [
{
"created": "Fri, 13 Nov 2015 20:15:19 GMT",
"version": "v1"
}
] | 2015-11-16 | [
[
"Mandal",
"Abhijit",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | The thermodynamic properties of Cauchy horizon is a matter of interest. Event horizon and Cauchy horizon together can enlighten us about the micro-states of a black hole. In addition, if we consider a black hole metric modified with quantum terms, which is not forcing the geodesics to focus at a singularity, the study ... |
2401.08783 | Adri\'an Del R\'io Vega | Adri\'an del R\'io, Evelyn-Andreea Ester | Electrically charged black hole solutions in semiclassical gravity and
dynamics of linear perturbations | 22 pages, one column format, 2 figures. Revised version: extra
references added, minor corrections, new appendix. Published in PRD | Phys. Rev. D 109, 105022 (2024) | 10.1103/PhysRevD.109.105022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore quantum corrections of electrically charged black holes subject to
vacuum polarization effects of fermion fields in QED. Solving this problem
exactly is challenging so we restrict to perturbative corrections that one can
obtain using the heat kernel expansion in the one-loop effective action for
electrons.... | [
{
"created": "Tue, 16 Jan 2024 19:04:42 GMT",
"version": "v1"
},
{
"created": "Sat, 18 May 2024 10:43:24 GMT",
"version": "v2"
}
] | 2024-05-21 | [
[
"del Río",
"Adrián",
""
],
[
"Ester",
"Evelyn-Andreea",
""
]
] | We explore quantum corrections of electrically charged black holes subject to vacuum polarization effects of fermion fields in QED. Solving this problem exactly is challenging so we restrict to perturbative corrections that one can obtain using the heat kernel expansion in the one-loop effective action for electrons. S... |
gr-qc/0202019 | Vitor Cardoso | Vitor Cardoso, Jose' P. S. Lemos | Gravitational radiation from collisions at the speed of light: a
massless particle falling into a Schwarzschild black hole | 10 pages, 3 figures, published version | Phys.Lett. B538 (2002) 1-5 | 10.1016/S0370-2693(02)01961-5 | null | gr-qc astro-ph hep-ph hep-th | null | We compute spectra, waveforms, angular distribution and total gravitational
energy of the gravitiational radiation emitted during the radial infall of a
massless particle into a Schwarzschild black hole. Our fully relativistic
approach shows that (i) less than 50% of the total energy radiated to infinity
is carried b... | [
{
"created": "Wed, 6 Feb 2002 14:26:23 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jun 2002 16:38:35 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Cardoso",
"Vitor",
""
],
[
"Lemos",
"Jose' P. S.",
""
]
] | We compute spectra, waveforms, angular distribution and total gravitational energy of the gravitiational radiation emitted during the radial infall of a massless particle into a Schwarzschild black hole. Our fully relativistic approach shows that (i) less than 50% of the total energy radiated to infinity is carried by ... |
2112.08531 | Karen Crowther | Karen Crowther and Sebastian De Haro | Four Attitudes Towards Singularities in the Search for a Theory of
Quantum Gravity | null | null | null | null | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | Singularities in general relativity and quantum field theory are often taken
not only to motivate the search for a more-fundamental theory (quantum gravity,
QG), but also to characterise this new theory and shape expectations of what it
is to achieve. Here, we first evaluate how particular types of singularities
may ... | [
{
"created": "Wed, 15 Dec 2021 23:51:12 GMT",
"version": "v1"
}
] | 2021-12-17 | [
[
"Crowther",
"Karen",
""
],
[
"De Haro",
"Sebastian",
""
]
] | Singularities in general relativity and quantum field theory are often taken not only to motivate the search for a more-fundamental theory (quantum gravity, QG), but also to characterise this new theory and shape expectations of what it is to achieve. Here, we first evaluate how particular types of singularities may su... |
2405.10813 | Hajime Kobayashi | Chams Gharib Ali Barura, Hajime Kobayashi, Shinji Mukohyama, Naritaka
Oshita, Kazufumi Takahashi, Vicharit Yingcharoenrat | Tidal Love Numbers from EFT of Black Hole Perturbations with Timelike
Scalar Profile | 40 pages | null | null | YITP-24-62, IPMU24-0018, RIKEN-iTHEMS-Report-24 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study static tidal Love numbers (TLNs) of a static and spherically
symmetric black hole for odd-parity metric perturbations. We describe black
hole perturbations using the effective field theory (EFT), formulated on an
arbitrary background with a timelike scalar profile in the context of
scalar-tensor theories. In... | [
{
"created": "Fri, 17 May 2024 14:27:26 GMT",
"version": "v1"
}
] | 2024-05-20 | [
[
"Barura",
"Chams Gharib Ali",
""
],
[
"Kobayashi",
"Hajime",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Oshita",
"Naritaka",
""
],
[
"Takahashi",
"Kazufumi",
""
],
[
"Yingcharoenrat",
"Vicharit",
""
]
] | We study static tidal Love numbers (TLNs) of a static and spherically symmetric black hole for odd-parity metric perturbations. We describe black hole perturbations using the effective field theory (EFT), formulated on an arbitrary background with a timelike scalar profile in the context of scalar-tensor theories. In p... |
2106.03426 | Olivier Minazzoli | Denis Arruga and Olivier Minazzoli | Analytical external spherical solutions in entangled relativity | 11 pages, 10 figures. Few changes and additions in v2 | null | 10.1140/epjc/s10052-021-09818-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we present analytical external spherical solutions of
entangled relativity, which we compare to numerical solutions obtained in a
Tolman-Oppenheimer-Volkoff framework. Analytical and numerical solutions match
perfectly well outside spherical compact objects, therefore validating both
types of solu... | [
{
"created": "Mon, 7 Jun 2021 08:48:12 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2021 14:01:56 GMT",
"version": "v2"
}
] | 2021-12-08 | [
[
"Arruga",
"Denis",
""
],
[
"Minazzoli",
"Olivier",
""
]
] | In this manuscript, we present analytical external spherical solutions of entangled relativity, which we compare to numerical solutions obtained in a Tolman-Oppenheimer-Volkoff framework. Analytical and numerical solutions match perfectly well outside spherical compact objects, therefore validating both types of soluti... |
2006.00634 | Siddarth Ajith | Siddarth Ajith, Alexander Saffer, Kent Yagi | Rotating black holes in valid vector-tensor theories after GW170817 | 12 pages, 3 figures | Phys. Rev. D 102, 064031 (2020) | 10.1103/PhysRevD.102.064031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vector-tensor theories beyond General Relativity have widely been studied in
the context of ultraviolet completion of gravity, endowing a mass to the
graviton and explaining dark energy phenomena. We here construct rotating black
hole solutions in vector-tensor theories valid after the binary neutron star
merger even... | [
{
"created": "Sun, 31 May 2020 23:07:02 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Sep 2020 17:00:23 GMT",
"version": "v2"
}
] | 2020-09-16 | [
[
"Ajith",
"Siddarth",
""
],
[
"Saffer",
"Alexander",
""
],
[
"Yagi",
"Kent",
""
]
] | Vector-tensor theories beyond General Relativity have widely been studied in the context of ultraviolet completion of gravity, endowing a mass to the graviton and explaining dark energy phenomena. We here construct rotating black hole solutions in vector-tensor theories valid after the binary neutron star merger event ... |
2105.11139 | Suvodip Mukherjee | Suvodip Mukherjee and Joseph Silk | Can we distinguish astrophysical from primordial black holes via the
stochastic gravitational wave background? | 10 pages, 4 figures. Accepted for publication in MNRAS | null | 10.1093/mnras/stab1932 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the crucial windows for distinguishing astrophysical black holes from
primordial black holes is through the redshift evolution of their respective
merger rates. The low redshift population of black holes of astrophysical
origin is expected to follow the star formation rate. The corresponding peak in
their merg... | [
{
"created": "Mon, 24 May 2021 07:41:39 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jul 2021 06:17:08 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Mukherjee",
"Suvodip",
""
],
[
"Silk",
"Joseph",
""
]
] | One of the crucial windows for distinguishing astrophysical black holes from primordial black holes is through the redshift evolution of their respective merger rates. The low redshift population of black holes of astrophysical origin is expected to follow the star formation rate. The corresponding peak in their merger... |
gr-qc/0110117 | Reg Cahill | Reginald T. Cahill (Flinders University, Australia) | Process Physics: Inertia, Gravity and the Quantum | LaTex, 18 pages 1 eps file. Contribution to the 3rd Australasian
Conference on General Relativity and Gravitation, Perth, Australia, July 2001 | Gen.Rel.Grav. 34 (2002) 1637-1656 | null | null | gr-qc | null | Process Physics models reality as self-organising relational or semantic
information using a self-referentially limited neural network model. This
generalises the traditional non-process syntactical modelling of reality by
taking account of the limitations and characteristics of self-referential
syntactical informati... | [
{
"created": "Mon, 29 Oct 2001 00:41:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cahill",
"Reginald T.",
"",
"Flinders University, Australia"
]
] | Process Physics models reality as self-organising relational or semantic information using a self-referentially limited neural network model. This generalises the traditional non-process syntactical modelling of reality by taking account of the limitations and characteristics of self-referential syntactical information... |
gr-qc/0212064 | David P. Rideout | David Rideout | Dynamics of Causal Sets | 121 pages, 32 figures, Ph.D. thesis, LaTeX | null | null | SU-GP-01/4-2 | gr-qc | null | The Causal Set approach to quantum gravity asserts that spacetime, at its
smallest length scale, has a discrete structure. This discrete structure takes
the form of a locally finite order relation, where the order, corresponding
with the macroscopic notion of spacetime causality, is taken to be a
fundamental aspect o... | [
{
"created": "Sat, 14 Dec 2002 02:29:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rideout",
"David",
""
]
] | The Causal Set approach to quantum gravity asserts that spacetime, at its smallest length scale, has a discrete structure. This discrete structure takes the form of a locally finite order relation, where the order, corresponding with the macroscopic notion of spacetime causality, is taken to be a fundamental aspect of ... |
gr-qc/9809020 | James M. Nester | C. M. Chen (Moscow State U.), J. M. Nester (Nat. Central U.) | Quasilocal quantities for GR and other gravity theories | LaTeX (ioplppt.sty), 33 pages, no figures, accepted by CQG, small
improvements, clarifications and new references, especially connection to
recent work of Katz et al | Class.Quant.Grav.16:1279-1304,1999 | 10.1088/0264-9381/16/4/018 | null | gr-qc | null | From a covariant Hamiltonian formulation, by using symplectic ideas, we
obtain certain covariant boundary expressions for the quasilocal quantities of
general relativity and other geometric gravity theories. The contribution from
each of the independent dynamic geometric variables (the frame, metric or
connection) ha... | [
{
"created": "Fri, 4 Sep 1998 06:32:48 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Feb 1999 06:04:57 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Chen",
"C. M.",
"",
"Moscow State U."
],
[
"Nester",
"J. M.",
"",
"Nat. Central U."
]
] | From a covariant Hamiltonian formulation, by using symplectic ideas, we obtain certain covariant boundary expressions for the quasilocal quantities of general relativity and other geometric gravity theories. The contribution from each of the independent dynamic geometric variables (the frame, metric or connection) has ... |
2405.18893 | Aleksandar Mikovic | Aleksandar Mikovic | Physical States and Transition Amplitudes in Piecewise Flat Quantum
Gravity | 23 pages, 7 figures, expanded version accepted for publication in
Int. J. Mod. Phys. D | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We show how the path integral for gravity and matter on a piecewise flat
spacetime can be used to define the physical quantum gravity states and the
related transition amplitudes. The physical states are given by the path
integrals for open manifolds from a certain topological class, while the
corresponding transitio... | [
{
"created": "Wed, 29 May 2024 08:53:10 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Aug 2024 10:36:21 GMT",
"version": "v2"
}
] | 2024-08-08 | [
[
"Mikovic",
"Aleksandar",
""
]
] | We show how the path integral for gravity and matter on a piecewise flat spacetime can be used to define the physical quantum gravity states and the related transition amplitudes. The physical states are given by the path integrals for open manifolds from a certain topological class, while the corresponding transition ... |
gr-qc/9506050 | David Wands | Juan Garcia-Bellido and David Wands | Constraints from Inflation on Scalar-Tensor Gravity Theories | LaTeX (with RevTex) 19 pages, 8 uuencoded figures appended, also
available on WWW via http://star.maps.susx.ac.uk/index.html | Phys. Rev. D 52, 6739 (1995) | 10.1103/PhysRevD.52.6739 | SUSSEX-AST-95/6-3, IEM-FT-107/95 | gr-qc astro-ph | null | We show how observations of the perturbation spectra produced during
inflation may be used to constrain the parameters of general scalar-tensor
theories of gravity, which include both an inflaton and dilaton field. An
interesting feature of these models is the possibility that the curvature
perturbations on super-hor... | [
{
"created": "Fri, 23 Jun 1995 14:20:21 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Garcia-Bellido",
"Juan",
""
],
[
"Wands",
"David",
""
]
] | We show how observations of the perturbation spectra produced during inflation may be used to constrain the parameters of general scalar-tensor theories of gravity, which include both an inflaton and dilaton field. An interesting feature of these models is the possibility that the curvature perturbations on super-horiz... |
2108.03075 | Andrew Finch | Salvatore Capozziello, Andrew Finch, Jackson Levi Said, Alessio Magro | The $3+1$ Formalism in the Geometric Trinity of Gravity | 23 pages | null | 10.1140/epjc/s10052-021-09944-6 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The geometric trinity of gravity offers a platform in which gravity can be
formulated in three analogous approaches, namely curvature, torsion and
nonmetricity. In this vein, general relativity can be expressed in three
dynamically equivalent ways which may offer insights into the different
properties of these decomp... | [
{
"created": "Fri, 6 Aug 2021 12:17:01 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Finch",
"Andrew",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Magro",
"Alessio",
""
]
] | The geometric trinity of gravity offers a platform in which gravity can be formulated in three analogous approaches, namely curvature, torsion and nonmetricity. In this vein, general relativity can be expressed in three dynamically equivalent ways which may offer insights into the different properties of these decompos... |
1411.0270 | Bang-Yen Chen | Bang-Yen Chen | A simple characterization of generalized Robertson-Walker spacetimes | 5 pages, to appear in General Relativity and Gravitation | null | 10.1007/s10714-014-1833-9 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalized Robertson-Walker spacetime is the warped product with base an
open interval of the real line endowed with the opposite of its metric and base
any Riemannian manifold. The family of generalized Robertson-Walker spacetimes
widely extends the one of classical Robertson-Walker spacetimes. In this
article we... | [
{
"created": "Sun, 2 Nov 2014 15:29:52 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Chen",
"Bang-Yen",
""
]
] | A generalized Robertson-Walker spacetime is the warped product with base an open interval of the real line endowed with the opposite of its metric and base any Riemannian manifold. The family of generalized Robertson-Walker spacetimes widely extends the one of classical Robertson-Walker spacetimes. In this article we p... |
1302.0800 | Jeffrey Winicour | H-O. Kreiss, J. Winicour | Geometric Boundary Data for the Gravitational Field | Clarification given and typos corrected. Published version | Class. Quantum Grav. 31 (2014) 065004 | 10.1088/0264-9381/31/6/065004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An outstanding issue in the treatment of boundaries in general relativity is
the lack of a local geometric interpretation of the necessary boundary data.
For the Cauchy problem, the initial data is supplied by the 3-metric and
extrinsic curvature of the initial Cauchy hypersurface.. This Cauchy data
determines a solu... | [
{
"created": "Mon, 4 Feb 2013 19:03:11 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2013 17:09:31 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Feb 2014 14:38:11 GMT",
"version": "v3"
}
] | 2014-03-05 | [
[
"Kreiss",
"H-O.",
""
],
[
"Winicour",
"J.",
""
]
] | An outstanding issue in the treatment of boundaries in general relativity is the lack of a local geometric interpretation of the necessary boundary data. For the Cauchy problem, the initial data is supplied by the 3-metric and extrinsic curvature of the initial Cauchy hypersurface.. This Cauchy data determines a soluti... |
2405.08170 | Maciej Dunajski | Maciej Dunajski, Paul Tod | Twistor theory of the Chen--Teo gravitational instanton | Dedicated to Nick Woodhouse on the occasion of his 75th birthday. The
link between the twistor mass and NUT parameters and the Kunduri-Lucietti
mass and the Chen-Teo NUT clarified following a comment from James Lucietti | null | null | null | gr-qc hep-th math.DG | http://creativecommons.org/publicdomain/zero/1.0/ | Toric Ricci--flat metrics in dimension four correspond to certain holomorphic
vector bundles over a twistor space. We construct these bundles explicitly, by
exhibiting and characterising their patching matrices, for the five--parameter
family of Riemannian ALF metrics constructed by Chen and Teo. The Chen--Teo
family... | [
{
"created": "Mon, 13 May 2024 20:29:50 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2024 21:17:01 GMT",
"version": "v2"
}
] | 2024-05-31 | [
[
"Dunajski",
"Maciej",
""
],
[
"Tod",
"Paul",
""
]
] | Toric Ricci--flat metrics in dimension four correspond to certain holomorphic vector bundles over a twistor space. We construct these bundles explicitly, by exhibiting and characterising their patching matrices, for the five--parameter family of Riemannian ALF metrics constructed by Chen and Teo. The Chen--Teo family c... |
1110.1668 | Jeffrey Kaplan | Michael I. Cohen, Jeffrey D. Kaplan, and Mark A. Scheel | On Toroidal Horizons in Binary Black Hole Inspirals | Submitted to Phys. Rev. D | Phys. Rev. D 85, 024031 (2012) | 10.1103/PhysRevD.85.024031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the structure of the event horizon for numerical simulations of
two black holes that begin in a quasicircular orbit, inspiral, and finally
merge. We find that the spatial cross section of the merged event horizon has
spherical topology (to the limit of our resolution), despite the expectation
that generic ... | [
{
"created": "Fri, 7 Oct 2011 22:00:55 GMT",
"version": "v1"
}
] | 2012-12-04 | [
[
"Cohen",
"Michael I.",
""
],
[
"Kaplan",
"Jeffrey D.",
""
],
[
"Scheel",
"Mark A.",
""
]
] | We examine the structure of the event horizon for numerical simulations of two black holes that begin in a quasicircular orbit, inspiral, and finally merge. We find that the spatial cross section of the merged event horizon has spherical topology (to the limit of our resolution), despite the expectation that generic bi... |
1612.08525 | Sunil Maharaj | P. Mafa Takisa, S. D. Maharaj | Anisotropic charged core envelope star | 11 pages, submitted for publication | Astrophys. Space Sci. 361, 262 (2016) | 10.1007/s10509-016-2840-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a charged compact object with anisotropic pressures in a core
envelope setting. The equation of state is quadratic in the core and linear in
the envelope. There is smooth matching between the three regions: the core,
envelope and the Reissner-Nordstr\"{o}m exterior. We show that the presence of
the electric ... | [
{
"created": "Tue, 27 Dec 2016 07:57:33 GMT",
"version": "v1"
}
] | 2017-01-04 | [
[
"Takisa",
"P. Mafa",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We study a charged compact object with anisotropic pressures in a core envelope setting. The equation of state is quadratic in the core and linear in the envelope. There is smooth matching between the three regions: the core, envelope and the Reissner-Nordstr\"{o}m exterior. We show that the presence of the electric fi... |
gr-qc/9902074 | Daniel Grumiller | D. Grumiller, W. Kummer | Absolute conservation law for black holes | LaTex, 17 pages, final version, to appear in Phys. Rev. D | Phys.Rev.D61:064006,2000 | 10.1103/PhysRevD.61.064006 | TUW-99-02, Vers. 2.1 | gr-qc | null | In all 2d theories of gravity a conservation law connects the (space-time
dependent) mass aspect function at all times and all radii with an integral of
the matter fields. It depends on an arbitrary constant which may be interpreted
as determining the initial value together with the initial values for the
matter fiel... | [
{
"created": "Tue, 23 Feb 1999 15:35:32 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Feb 1999 10:03:37 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jun 1999 14:20:35 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Nov 1999 13:31:42 GMT",
"version": "v4"
}
] | 2014-11-17 | [
[
"Grumiller",
"D.",
""
],
[
"Kummer",
"W.",
""
]
] | In all 2d theories of gravity a conservation law connects the (space-time dependent) mass aspect function at all times and all radii with an integral of the matter fields. It depends on an arbitrary constant which may be interpreted as determining the initial value together with the initial values for the matter field.... |
gr-qc/0209089 | Luc Blanchet | Luc Blanchet and Bala Iyer | Third post-Newtonian dynamics of compact binaries: Equations of motion
in the center-of-mass frame | 31 pages, to appear in Classical and Quantum Gravity | Class.Quant.Grav. 20 (2003) 755 | 10.1088/0264-9381/20/4/309 | null | gr-qc | null | The equations of motion of compact binary systems and their associated
Lagrangian formulation have been derived in previous works at the third
post-Newtonian (3PN) approximation of general relativity in harmonic
coordinates. In the present work we investigate the binary's relative dynamics
in the center-of-mass frame... | [
{
"created": "Tue, 24 Sep 2002 14:16:31 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jan 2003 11:15:00 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Blanchet",
"Luc",
""
],
[
"Iyer",
"Bala",
""
]
] | The equations of motion of compact binary systems and their associated Lagrangian formulation have been derived in previous works at the third post-Newtonian (3PN) approximation of general relativity in harmonic coordinates. In the present work we investigate the binary's relative dynamics in the center-of-mass frame (... |
2404.08740 | Marco Brito MSc | Marco Brito, Carlos Herdeiro, Nicolas Sanchis-Gual, Etevaldo dos
Santos Costa Filho, Miguel Zilh\~ao | Self-interactions can (also) destabilize bosonic stars | 14 pages, 11 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamical stability of Proca-Higgs stars, in spherical symmetry.
These are solutions of the Einstein-Proca-Higgs model, which features a
Higgs-like field coupled to a Proca field, both of which minimally coupled to
the gravitational field. The corresponding stars can be regarded as Proca stars
with self-... | [
{
"created": "Fri, 12 Apr 2024 18:04:23 GMT",
"version": "v1"
}
] | 2024-04-16 | [
[
"Brito",
"Marco",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Filho",
"Etevaldo dos Santos Costa",
""
],
[
"Zilhão",
"Miguel",
""
]
] | We study the dynamical stability of Proca-Higgs stars, in spherical symmetry. These are solutions of the Einstein-Proca-Higgs model, which features a Higgs-like field coupled to a Proca field, both of which minimally coupled to the gravitational field. The corresponding stars can be regarded as Proca stars with self-in... |
1302.2919 | Michael Boyle | Michael Boyle | Angular velocity of gravitational radiation from precessing binaries and
the corotating frame | Accepted by PRD; added a few clarifications | Phys. Rev. D 87, 104006 (2013) | 10.1103/PhysRevD.87.104006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper defines an angular velocity for time-dependent functions on the
sphere, and applies it to gravitational waveforms from compact binaries.
Because it is geometrically meaningful and has a clear physical motivation, the
angular velocity is uniquely useful in helping to solve an important---and
largely ignored... | [
{
"created": "Tue, 12 Feb 2013 21:00:03 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Feb 2013 20:42:47 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Apr 2013 03:22:31 GMT",
"version": "v3"
}
] | 2017-10-27 | [
[
"Boyle",
"Michael",
""
]
] | This paper defines an angular velocity for time-dependent functions on the sphere, and applies it to gravitational waveforms from compact binaries. Because it is geometrically meaningful and has a clear physical motivation, the angular velocity is uniquely useful in helping to solve an important---and largely ignored--... |
1308.6489 | Anja Marunovic | Anja Marunovic and Miljenko Murkovic | A novel black hole mimicker: a boson star and a global monopole
nonminimally coupled to gravity | 22 pages, 18 figures; References added; matches published version | Class. Quantum Grav. 31 (2014) 045010 | 10.1088/0264-9381/31/4/045010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A field-theoretic model for a highly compact object that mimicks a black hole
is found for the gravitationally interacting system of a boson star and a
global monopole which are nonminimally coupled to gravity. According to the
strength of the nonlinear gravitational effects and the gravitational
backreaction, three ... | [
{
"created": "Thu, 29 Aug 2013 14:58:33 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Feb 2014 16:45:46 GMT",
"version": "v2"
}
] | 2014-02-12 | [
[
"Marunovic",
"Anja",
""
],
[
"Murkovic",
"Miljenko",
""
]
] | A field-theoretic model for a highly compact object that mimicks a black hole is found for the gravitationally interacting system of a boson star and a global monopole which are nonminimally coupled to gravity. According to the strength of the nonlinear gravitational effects and the gravitational backreaction, three di... |
2405.01201 | Thomas Thiemann | Thomas Thiemann | Observations on representations of the spatial diffeomorphism group and
algebra in all dimensions | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The canonical quantisation of General Relativity including matter on a
spacetime manifold in the globally hyperbolic setting involves in particular
the representation theory of the spatial diffeomorphism group (SDG), and/or its
Lie algebra (SDA), of the underlying spatial submanifold. There are well known
Fock repres... | [
{
"created": "Thu, 2 May 2024 11:43:14 GMT",
"version": "v1"
}
] | 2024-05-03 | [
[
"Thiemann",
"Thomas",
""
]
] | The canonical quantisation of General Relativity including matter on a spacetime manifold in the globally hyperbolic setting involves in particular the representation theory of the spatial diffeomorphism group (SDG), and/or its Lie algebra (SDA), of the underlying spatial submanifold. There are well known Fock represen... |
1404.0602 | Eugenio Bianchi | Eugenio Bianchi and Matteo Smerlak | Entanglement entropy and negative energy in two dimensions | 5 pages, 3 figures | Phys. Rev. D 90, 041904 (2014) | 10.1103/PhysRevD.90.041904 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that quantum effects can produce negative energy densities,
though for limited times. Here we show in the context of two-dimensional CFT
that such negative energy densities are present in any non-trivial conformal
vacuum and can be interpreted in terms of the entanglement structure of such
states. We... | [
{
"created": "Wed, 2 Apr 2014 16:15:16 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Apr 2014 17:32:00 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Aug 2014 20:39:56 GMT",
"version": "v3"
}
] | 2014-09-05 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Smerlak",
"Matteo",
""
]
] | It is well known that quantum effects can produce negative energy densities, though for limited times. Here we show in the context of two-dimensional CFT that such negative energy densities are present in any non-trivial conformal vacuum and can be interpreted in terms of the entanglement structure of such states. We d... |
2304.03263 | Andrea Giusti | Jorge Ovalle, Roberto Casadio, Andrea Giusti | Regular hairy black holes through Minkowski deformation | 8 pages, 3 figures, final version to appear in Phys.Lett.B | null | 10.1016/j.physletb.2023.138085 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Static and stationary regular black holes are examined under a minimal set of
requirements consisting of (i) the existence of a well defined event horizon
and (ii) the weak energy condition for matter sourcing the geometry. We perform
our analysis by means of the gravitational decoupling approach and find hairy
solut... | [
{
"created": "Thu, 6 Apr 2023 17:47:50 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jul 2023 05:27:38 GMT",
"version": "v2"
}
] | 2023-07-24 | [
[
"Ovalle",
"Jorge",
""
],
[
"Casadio",
"Roberto",
""
],
[
"Giusti",
"Andrea",
""
]
] | Static and stationary regular black holes are examined under a minimal set of requirements consisting of (i) the existence of a well defined event horizon and (ii) the weak energy condition for matter sourcing the geometry. We perform our analysis by means of the gravitational decoupling approach and find hairy solutio... |
2203.00492 | Zahra Feizi Mangoudehi | Z. Feizi Mangoudehi | Interacting Tsallis agegraphic dark energy in DGP Braneworld Cosmology | 32 pager, 15 figures accepted in Astrophysics and Space Science | Astrophys Space Sci 367, 31 (2022) (view-only version link=
https://rdcu.be/cI39R) | 10.1007/s10509-022-04044-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to study the Tsallis agegraphic dark energy with
an interaction term between dark energy and dark matter in the DGP brane-world
scenario. For this, we assume some initial conditions to obtain the dark energy
density, deceleration, dark energy EoS, and total EoS parameters. Then, we
analyz... | [
{
"created": "Tue, 1 Mar 2022 14:39:53 GMT",
"version": "v1"
}
] | 2022-03-17 | [
[
"Mangoudehi",
"Z. Feizi",
""
]
] | The purpose of this paper is to study the Tsallis agegraphic dark energy with an interaction term between dark energy and dark matter in the DGP brane-world scenario. For this, we assume some initial conditions to obtain the dark energy density, deceleration, dark energy EoS, and total EoS parameters. Then, we analyze ... |
gr-qc/0310091 | Pieter Blue | P. Blue, A. Soffer | Semilinear wave equations on the Schwarzschild manifold I: Local decay
estimates | AMS-LaTeX, 16 pages. There is an errata to this paper at
gr-qc/0608073 | Adv.Diff.Eq. 8 (2003) 595-614 | null | null | gr-qc | null | The semilinear wave equation on the (outer) Schwarzschild manifold is
studied. We prove local decay estimates for general (non-radial) data, deriving
a-priori Morawetz type estimates.
| [
{
"created": "Sun, 19 Oct 2003 16:33:17 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Aug 2006 22:11:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Blue",
"P.",
""
],
[
"Soffer",
"A.",
""
]
] | The semilinear wave equation on the (outer) Schwarzschild manifold is studied. We prove local decay estimates for general (non-radial) data, deriving a-priori Morawetz type estimates. |
2303.13302 | Adam Balcerzak | Adam Balcerzak, Mateusz Lisaj | Spinor wave function of the Universe in non-minimally coupled varying
constants cosmologies | 7 pages, 1 figure | null | 10.1140/epjc/s10052-023-11577-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we introduce a non-minimally coupled varying speed of light
and varying gravitational constant cosmological toy model. Using the
Eisenhart-Duval lifting method, we extend the original minisuperspace of the
model and depict the evolution of the system in the presence of the potential
term as a geometric... | [
{
"created": "Thu, 23 Mar 2023 14:39:02 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Mar 2023 12:20:35 GMT",
"version": "v2"
},
{
"created": "Sun, 14 May 2023 08:23:35 GMT",
"version": "v3"
}
] | 2023-05-16 | [
[
"Balcerzak",
"Adam",
""
],
[
"Lisaj",
"Mateusz",
""
]
] | In this paper, we introduce a non-minimally coupled varying speed of light and varying gravitational constant cosmological toy model. Using the Eisenhart-Duval lifting method, we extend the original minisuperspace of the model and depict the evolution of the system in the presence of the potential term as a geometrical... |
2110.12188 | Mert Mangut | Ozay Gurtug, Mustafa Halilsoy and Mert Mangut | The Charged Zipoy-Voorhees Metric with Astrophysical Applications | New sections are added and supported with new graphs. Typos are
corrected. Matched with published version | Eur. Phys. J. C 82, 671 (2022) | 10.1140/epjc/s10052-022-10626-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from an integral of the interaction region of colliding
Einstein-Maxwell waves and by applying a coordinate transformation, we obtain
the charged version of the static Zipoy-Voorhees (ZV) metric valid for all
values of the distortion parameter $\gamma$. In Schwarzschild coordinates, we
investigate the effect... | [
{
"created": "Sat, 23 Oct 2021 10:05:07 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2021 20:02:09 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Feb 2022 14:13:05 GMT",
"version": "v3"
},
{
"created": "Tue, 9 Aug 2022 15:01:31 GMT",
"version": "v4"
}
] | 2022-08-10 | [
[
"Gurtug",
"Ozay",
""
],
[
"Halilsoy",
"Mustafa",
""
],
[
"Mangut",
"Mert",
""
]
] | Starting from an integral of the interaction region of colliding Einstein-Maxwell waves and by applying a coordinate transformation, we obtain the charged version of the static Zipoy-Voorhees (ZV) metric valid for all values of the distortion parameter $\gamma$. In Schwarzschild coordinates, we investigate the effect o... |
gr-qc/0301100 | Jian Qi Shen | Jian-Qi Shen | Dynamics of Gravitomagnetic Charge | 10 pages, Latex. This paper was not published. For the relevant
papers, see: General Relativity and Gravitation 34: 1423-1435 (2002); Annalen
der Physik 13: 532-553 (2004) | null | null | null | gr-qc | null | The physically interesting gravitational analogue of magnetic monopole in
electrodynamics is considered in the present paper. The author investigates the
field equation of gravitomagnetic matter, and the exact static cylindrically
symmetric solution of field equation as well as the motion of gravitomagnetic
charge in... | [
{
"created": "Fri, 24 Jan 2003 08:22:59 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jan 2003 07:36:45 GMT",
"version": "v2"
}
] | 2015-09-14 | [
[
"Shen",
"Jian-Qi",
""
]
] | The physically interesting gravitational analogue of magnetic monopole in electrodynamics is considered in the present paper. The author investigates the field equation of gravitomagnetic matter, and the exact static cylindrically symmetric solution of field equation as well as the motion of gravitomagnetic charge in g... |
gr-qc/9903040 | Hans-Jurgen Matschull | Hans-Juergen Matschull | On the relation between 2+1 Einstein gravity and Chern Simons theory | 14 pages, LaTeX2e, 3 eps figures | Class.Quant.Grav. 16 (1999) 2599-2609 | 10.1088/0264-9381/16/8/303 | MZ-TH/99-04 | gr-qc | null | A simple example is given to show that the gauge equivalence classes of
physical states in Chern Simons theory are not in one-to-one correspondence
with those of Einstein gravity in three spacetime dimensions. The two theories
are therefore not equivalent. It is shown that including singular metrics into
general rela... | [
{
"created": "Thu, 11 Mar 1999 13:12:00 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Matschull",
"Hans-Juergen",
""
]
] | A simple example is given to show that the gauge equivalence classes of physical states in Chern Simons theory are not in one-to-one correspondence with those of Einstein gravity in three spacetime dimensions. The two theories are therefore not equivalent. It is shown that including singular metrics into general relati... |
2408.06176 | Allan Alinea | Allan L. Alinea, Joshwa DJ. Ordonez | On the KG-constrained general disformal transformation of the
Einstein-Hilbert action | 15 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Although with great successes in explaining phenomena and natural behaviour
involving the Universe or a part thereof, the General Theory of Relativity is
far from a complete theory. There are plenty of avenues to investigate its
extensions or generalisations that, in the future, could pave the way for a
much deeper u... | [
{
"created": "Mon, 12 Aug 2024 14:22:53 GMT",
"version": "v1"
}
] | 2024-08-13 | [
[
"Alinea",
"Allan L.",
""
],
[
"Ordonez",
"Joshwa DJ.",
""
]
] | Although with great successes in explaining phenomena and natural behaviour involving the Universe or a part thereof, the General Theory of Relativity is far from a complete theory. There are plenty of avenues to investigate its extensions or generalisations that, in the future, could pave the way for a much deeper und... |
2309.07342 | Serban Cicortas | Serban Cicortas | Scattering for the Wave Equation on de Sitter Space in All Even Spatial
Dimensions | 37 pages; minor corrections and added references for section 1 | null | null | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | For any $n\geq4$ even, we establish a complete scattering theory for the
linear wave equation on the $(n+1)$-dimensional de Sitter space. We prove the
existence and uniqueness of scattering states, and asymptotic completeness.
Moreover, we construct the scattering map taking asymptotic data at past
infinity $\mathscr... | [
{
"created": "Wed, 13 Sep 2023 22:43:20 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Sep 2023 22:05:56 GMT",
"version": "v2"
},
{
"created": "Wed, 8 May 2024 18:21:05 GMT",
"version": "v3"
}
] | 2024-05-10 | [
[
"Cicortas",
"Serban",
""
]
] | For any $n\geq4$ even, we establish a complete scattering theory for the linear wave equation on the $(n+1)$-dimensional de Sitter space. We prove the existence and uniqueness of scattering states, and asymptotic completeness. Moreover, we construct the scattering map taking asymptotic data at past infinity $\mathscr{I... |
gr-qc/9907099 | Mark E. Rupright | Arlen Anderson, Yvonne Choquet-Bruhat, and James W. York Jr | Einstein's Equations and Equivalent Hyperbolic Dynamical Systems | 30 pages, LaTeX2e, to be published in the Proceedings of the 2nd
Samos Meeting. (Errors in previous version corrected) | null | null | null | gr-qc | null | We discuss several explicitly causal hyperbolic formulations of Einstein's
dynamical 3+1 equations in a coherent way, emphasizing throughout the
fundamental role of the ``slicing function,'' $\alpha$---the quantity that
relates the lapse $N$ to the determinant of the spatial metric $\bar{g}$
through $N = \bar{g}^{1/2... | [
{
"created": "Wed, 28 Jul 1999 19:37:54 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Aug 1999 18:34:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Anderson",
"Arlen",
""
],
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"York",
"James W.",
"Jr"
]
] | We discuss several explicitly causal hyperbolic formulations of Einstein's dynamical 3+1 equations in a coherent way, emphasizing throughout the fundamental role of the ``slicing function,'' $\alpha$---the quantity that relates the lapse $N$ to the determinant of the spatial metric $\bar{g}$ through $N = \bar{g}^{1/2} ... |
1606.05295 | Sebasti\'an Bahamonde | Sebastian Bahamonde, Mubasher Jamil, Petar Pavlovic, Marko Sossich | Cosmological wormholes in $f(R)$ theories of gravity | Slighly updated version. Accepted for publication in Physical Review
D | Phys. Rev. D 94, 044041 (2016) | 10.1103/PhysRevD.94.044041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent proposals of possible wormhole existence in galactic
halos, we analyse the cosmological evolution of wormhole solutions in modified
$f(R)$ gravity. We construct a dynamical wormhole that asymptotically
approaches FLRW universe, with supporting material going to the perfect
isotropic fluid describe... | [
{
"created": "Thu, 16 Jun 2016 18:01:17 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Aug 2016 17:52:25 GMT",
"version": "v2"
}
] | 2016-08-24 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Pavlovic",
"Petar",
""
],
[
"Sossich",
"Marko",
""
]
] | Motivated by recent proposals of possible wormhole existence in galactic halos, we analyse the cosmological evolution of wormhole solutions in modified $f(R)$ gravity. We construct a dynamical wormhole that asymptotically approaches FLRW universe, with supporting material going to the perfect isotropic fluid described ... |
gr-qc/0509127 | Aharon Davidson | Aharon Davidson, David Karasik, and Yoav Lederer | Geodesic Nucleation and Evolution of a de Sitter Brane | 5 PRD pages, 4 eps figures | Phys.Rev.D72:064011,2005 | 10.1103/PhysRevD.72.064011 | null | gr-qc | null | Within the framework of Geodesic Brane Gravity, the deviation from General
Relativity is parameterized by the conserved bulk energy. The corresponding
geodesic evolution/nucleation of a de-Sitter brane is shown to be exclusively
driven by a double-well Higgs potential, rather than by a plain cosmological
constant. Th... | [
{
"created": "Fri, 30 Sep 2005 15:05:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Davidson",
"Aharon",
""
],
[
"Karasik",
"David",
""
],
[
"Lederer",
"Yoav",
""
]
] | Within the framework of Geodesic Brane Gravity, the deviation from General Relativity is parameterized by the conserved bulk energy. The corresponding geodesic evolution/nucleation of a de-Sitter brane is shown to be exclusively driven by a double-well Higgs potential, rather than by a plain cosmological constant. The ... |
1207.5359 | Lorenzo De Vittori | Lorenzo De Vittori, Philippe Jetzer, Antoine Klein | Gravitational wave energy spectrum of hyperbolic encounters | 9 pages, 4 figures, Accepted for publication in Physical Review D | Phys.Rev.D 86 (2012) 044017 | 10.1103/PhysRevD.86.044017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emission of gravitational waves is studied for a system of massive
objects interacting on hyperbolic orbits within the quadrupole approximation
following the work of Capozziello et al. Here we focus on the derivation of an
analytic formula for the energy spectrum of the emitted waves. We checked
numerically that ... | [
{
"created": "Mon, 23 Jul 2012 11:27:58 GMT",
"version": "v1"
}
] | 2012-08-13 | [
[
"De Vittori",
"Lorenzo",
""
],
[
"Jetzer",
"Philippe",
""
],
[
"Klein",
"Antoine",
""
]
] | The emission of gravitational waves is studied for a system of massive objects interacting on hyperbolic orbits within the quadrupole approximation following the work of Capozziello et al. Here we focus on the derivation of an analytic formula for the energy spectrum of the emitted waves. We checked numerically that ou... |
1606.06605 | Francesco Becattini | F. Becattini | Thermodynamic equilibrium in relativity: four-temperature, Killing
vectors and Lie derivatives | 13 pages | null | 10.5506/APhysPolB.47.1819 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main concepts of general relativistic thermodynamics and general
relativistic statistical mechanics are reviewed. The main building block of the
proper relativistic extension of the classical thermodynamics laws is the
four-temperature vector \beta, which plays a major role in the quantum
framework and defines a ... | [
{
"created": "Tue, 21 Jun 2016 14:56:42 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Becattini",
"F.",
""
]
] | The main concepts of general relativistic thermodynamics and general relativistic statistical mechanics are reviewed. The main building block of the proper relativistic extension of the classical thermodynamics laws is the four-temperature vector \beta, which plays a major role in the quantum framework and defines a ve... |
1007.3368 | Julian Barbour | Julian Barbour | The Definition of Mach's Principle | To be published in Foundations of Physics as invited contribution to
Peter Mittelstaedt's 80th Birthday Festschrift. 30 pages | Found.Phys.40:1263-1284,2010 | 10.1007/s10701-010-9490-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two definitions of Mach's principle are proposed. Both are related to gauge
theory, are universal in scope and amount to formulations of causality that
take into account the relational nature of position, time, and size. One of
them leads directly to general relativity and may have relevance to the problem
of creatin... | [
{
"created": "Tue, 20 Jul 2010 09:14:50 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Barbour",
"Julian",
""
]
] | Two definitions of Mach's principle are proposed. Both are related to gauge theory, are universal in scope and amount to formulations of causality that take into account the relational nature of position, time, and size. One of them leads directly to general relativity and may have relevance to the problem of creating ... |
gr-qc/0603130 | Spiros Cotsakis | Spiros Cotsakis and Ifigeneia Klaoudatou | Singular Isotropic Cosmologies and Bel-Robinson Energy | 13 pages, to appear in the Proceedings of the A. Einstein Century
International Conference, Paris, France, July 18-22, 2005 | null | 10.1063/1.2399667 | RG-MPC/060331-1 | gr-qc | null | We consider the problem of the nature and possible types of spacetime
singularities that can form during the evolution of \emph{FRW} universes in
general relativity. We show that by using, in addition to the Hubble expansion
rate and the scale factor, the Bel-Robinson energy of these universes we can
consistently dis... | [
{
"created": "Fri, 31 Mar 2006 10:40:45 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
]
] | We consider the problem of the nature and possible types of spacetime singularities that can form during the evolution of \emph{FRW} universes in general relativity. We show that by using, in addition to the Hubble expansion rate and the scale factor, the Bel-Robinson energy of these universes we can consistently disti... |
1111.5274 | Tjonnie Guang Feng Li | T. G. F. Li, W. Del Pozzo, S. Vitale, C. Van Den Broeck, M. Agathos,
J. Veitch, K. Grover, T. Sidery, R. Sturani, A. Vecchio | Towards a generic test of the strong field dynamics of general
relativity using compact binary coalescence: Further investigations | 15 pages, 7 figures, Amaldi 9 proceedings | null | 10.1088/1742-6596/363/1/012028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we elaborate on earlier work by the same authors in which a
novel Bayesian inference framework for testing the strong-field dynamics of
General Relativity using coalescing compact binaries was proposed. Unlike
methods that were used previously, our technique addresses the question whether
one or more 't... | [
{
"created": "Tue, 22 Nov 2011 18:29:40 GMT",
"version": "v1"
},
{
"created": "Thu, 3 May 2012 22:05:16 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Li",
"T. G. F.",
""
],
[
"Del Pozzo",
"W.",
""
],
[
"Vitale",
"S.",
""
],
[
"Broeck",
"C. Van Den",
""
],
[
"Agathos",
"M.",
""
],
[
"Veitch",
"J.",
""
],
[
"Grover",
"K.",
""
],
[
"Sidery",
"T... | In this paper we elaborate on earlier work by the same authors in which a novel Bayesian inference framework for testing the strong-field dynamics of General Relativity using coalescing compact binaries was proposed. Unlike methods that were used previously, our technique addresses the question whether one or more 'tes... |
1504.07817 | Jose Geraldo Pereira | H. Arcos, M. Krssak, J. G. Pereira | Exploring Higher-Order Gravitational Waves | 12 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In addition to the usual linear gravitational waves in transverse-traceless
coordinates, higher-order gravitational field equations, as well as their
corresponding solutions, are explicitly obtained. It is found that higher-order
waves do not represent corrections to the first-order wave. In contrast, all
higher than... | [
{
"created": "Wed, 29 Apr 2015 11:42:08 GMT",
"version": "v1"
}
] | 2015-04-30 | [
[
"Arcos",
"H.",
""
],
[
"Krssak",
"M.",
""
],
[
"Pereira",
"J. G.",
""
]
] | In addition to the usual linear gravitational waves in transverse-traceless coordinates, higher-order gravitational field equations, as well as their corresponding solutions, are explicitly obtained. It is found that higher-order waves do not represent corrections to the first-order wave. In contrast, all higher than s... |
gr-qc/0511032 | Choquet-Bruhat | Yvonne Choquet-Bruhat and James W. York | Einstein Bianchi equations with sources | submitted for special issue of Circolo Matematico di Palermo in honor
of Guy Boilla | null | null | null | gr-qc | null | In this article, dedicated to one of the best specialist of the FOSH systems,
we couple the Bianchi equations with the equations satisfied by the dynamical
acceleration of a charged fluid and the derivatives of the associated Maxwell
field.
| [
{
"created": "Mon, 7 Nov 2005 13:14:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"York",
"James W.",
""
]
] | In this article, dedicated to one of the best specialist of the FOSH systems, we couple the Bianchi equations with the equations satisfied by the dynamical acceleration of a charged fluid and the derivatives of the associated Maxwell field. |
2008.07040 | Marco Maceda | Marco Maceda and Alfredo Mac\'ias and Daniel Mart\'inez-Carbajal | Shadow of a noncommutative inspired Einstein-Euler-Heisenberg black hole | 8 pages, 5 figures; minor modifications, some typos corrected | null | 10.1142/S0217751X21501918 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a noncommutative inspired Einstein-Euler-Heisenberg black hole, we
analyse the associated graviton and light rings that together with the event
horizon, provide the necessary components to build its shadow. An analysis of
the angular radius of the noncommutative inspired Einstein-Euler-Heisenberg
black hole sho... | [
{
"created": "Mon, 17 Aug 2020 00:52:30 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2020 19:32:29 GMT",
"version": "v2"
}
] | 2021-10-27 | [
[
"Maceda",
"Marco",
""
],
[
"Macías",
"Alfredo",
""
],
[
"Martínez-Carbajal",
"Daniel",
""
]
] | Using a noncommutative inspired Einstein-Euler-Heisenberg black hole, we analyse the associated graviton and light rings that together with the event horizon, provide the necessary components to build its shadow. An analysis of the angular radius of the noncommutative inspired Einstein-Euler-Heisenberg black hole shows... |
gr-qc/0702035 | David W. Neilsen | David Neilsen, Eric W. Hirschmann, Matthew Anderson, and Steven L.
Liebling | Adaptive Mesh Refinement and Relativistic MHD | 3 Pages, Proceedings of the Marcel Grossmann Meeting XI | null | 10.1142/9789812834300_0200 | null | gr-qc | null | We solve the general relativistic magnetohydrodynamics equations using
distributed parallel adaptive mesh refinement. We discuss strong scaling tests
of the code, and present evolutions of Michel accretion and a TOV star.
| [
{
"created": "Tue, 6 Feb 2007 20:55:07 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Neilsen",
"David",
""
],
[
"Hirschmann",
"Eric W.",
""
],
[
"Anderson",
"Matthew",
""
],
[
"Liebling",
"Steven L.",
""
]
] | We solve the general relativistic magnetohydrodynamics equations using distributed parallel adaptive mesh refinement. We discuss strong scaling tests of the code, and present evolutions of Michel accretion and a TOV star. |
0905.3833 | H\'ector Calder\'on | H\'ector H. Calder\'on | The Reciprocal of the Fundamental Theorem of Riemannian Geometry | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fundamental theorem of Riemannian geometry is inverted for analytic
Christoffel symbols. The inversion formula, henceforth dubbed Ricardo's
formula, is obtained without ancillary assumptions. Even though Ricardo's
formula can mathematically give the full answer, it is argued that the solution
should be taken only... | [
{
"created": "Sat, 23 May 2009 16:48:27 GMT",
"version": "v1"
}
] | 2009-05-26 | [
[
"Calderón",
"Héctor H.",
""
]
] | The fundamental theorem of Riemannian geometry is inverted for analytic Christoffel symbols. The inversion formula, henceforth dubbed Ricardo's formula, is obtained without ancillary assumptions. Even though Ricardo's formula can mathematically give the full answer, it is argued that the solution should be taken only u... |
1102.0117 | Remo Garattini | Remo Garattini | Modified Dispersion Relations and Noncommutative Geometry lead to a
finite Zero Point Energy | Contribution written for the Proceedings of Frontiers of Fundamental
Physics [FFP11], 6-9 July 2010, Paris. 12 Pages | null | 10.1063/1.4728001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute Zero Point Energy in a spherically symmetric background with the
help of the Wheeler-DeWitt equation. This last one is regarded as a
Sturm-Liouville problem with the cosmological constant considered as the
associated eigenvalue. The graviton contribution, at one loop is extracted wit
the help of a variatio... | [
{
"created": "Tue, 1 Feb 2011 10:17:25 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Garattini",
"Remo",
""
]
] | We compute Zero Point Energy in a spherically symmetric background with the help of the Wheeler-DeWitt equation. This last one is regarded as a Sturm-Liouville problem with the cosmological constant considered as the associated eigenvalue. The graviton contribution, at one loop is extracted wit the help of a variationa... |
1903.08809 | Pitayuth Wongjun | Sushant G. Ghosh, Rahul Kumar, Lunchakorn Tannukij, Pitayuth Wongjun | Rotating black string in dRGT massive gravity | 27 pages, 18 figures; V2 minor change, two column, 14 pages, 18
figures,V3 more information and discussion added, V4 minor change, matched
with PRD | Phys. Rev. D 101, 104042 (2020) | 10.1103/PhysRevD.101.104042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the solutions of Einstein field equation with cylindrical symmetry is
known as black string solution. In this work, the rotating black string
solution in dRGT massive gravity is obtained and then called rotating-dRGT
black string solution. This solution is a kind of generalized version of
rotating AdS/dS black... | [
{
"created": "Thu, 21 Mar 2019 02:35:29 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2019 08:15:42 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Feb 2020 15:32:47 GMT",
"version": "v3"
},
{
"created": "Wed, 3 Jun 2020 06:03:19 GMT",
"version": "v4"
}
] | 2020-06-04 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Kumar",
"Rahul",
""
],
[
"Tannukij",
"Lunchakorn",
""
],
[
"Wongjun",
"Pitayuth",
""
]
] | One of the solutions of Einstein field equation with cylindrical symmetry is known as black string solution. In this work, the rotating black string solution in dRGT massive gravity is obtained and then called rotating-dRGT black string solution. This solution is a kind of generalized version of rotating AdS/dS black s... |
gr-qc/0205046 | Kudoh Hideaki | Hideaki Kudoh | Gravity beyond linear perturbations in the braneworld | 12 pages, typos corrected, Proceedings for YITP workshop "Braneworld
-Dynamics of spacetime boundary -" | Prog.Theor.Phys.Suppl.148:145-157,2003 | 10.1143/PTPS.148.145 | KUNS-1787 | gr-qc | null | In the present paper, we briefly review recent studies of second-order
gravitational perturbations in braneworld models. After we consider the
possibility of pathological behavior of gravity at higher orders of
perturbation, second-order perturbations are discussed in Randall-Sundrum
braneworld models. Because the ma... | [
{
"created": "Sun, 12 May 2002 14:02:17 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Feb 2003 15:20:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kudoh",
"Hideaki",
""
]
] | In the present paper, we briefly review recent studies of second-order gravitational perturbations in braneworld models. After we consider the possibility of pathological behavior of gravity at higher orders of perturbation, second-order perturbations are discussed in Randall-Sundrum braneworld models. Because the mass... |
gr-qc/0505133 | Alan D. Rendall | Alan D. Rendall | Theorems on existence and global dynamics for the Einstein equations | Submitted to Living Reviews in Relativity, major update of Living
Rev. Rel. 5 (2002) 6 | LivingRev.Rel.8:6,2002 | 10.12942/lrr-2005-6 | AEI-2005-106 | gr-qc | null | This article is a guide to theorems on existence and global dynamics of
solutions of the Einstein equations. It draws attention to open questions in
the field. The local-in-time Cauchy problem, which is relatively well
understood, is surveyed. Global results for solutions with various types of
symmetry are discussed.... | [
{
"created": "Thu, 26 May 2005 09:42:26 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Rendall",
"Alan D.",
""
]
] | This article is a guide to theorems on existence and global dynamics of solutions of the Einstein equations. It draws attention to open questions in the field. The local-in-time Cauchy problem, which is relatively well understood, is surveyed. Global results for solutions with various types of symmetry are discussed. A... |
1902.00783 | Nidal Chamoun | A. Ashour (Damascus Univ.), M. Alcheikh (Damascus Univ.) and N.
Chamoun (HIAST) | General Modified Friedmann Equations in Rainbow Flat Universe, by
Thermodynamics | 7 pages, to appear in EPJC | null | 10.1140/epjc/s10052-019-6640-8 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the derivation of Friedmann equations in Rainbow gravity
following Jacobson thermodynamic approach. We do not restrict the rainbow
functions to be constant as is customarily used, and show that the first law of
thermodynamics with a corresponding `classical' proportionality between entropy
and surface ... | [
{
"created": "Sat, 2 Feb 2019 20:37:37 GMT",
"version": "v1"
}
] | 2020-05-28 | [
[
"Ashour",
"A.",
"",
"Damascus Univ."
],
[
"Alcheikh",
"M.",
"",
"Damascus Univ."
],
[
"Chamoun",
"N.",
"",
"HIAST"
]
] | We investigate the derivation of Friedmann equations in Rainbow gravity following Jacobson thermodynamic approach. We do not restrict the rainbow functions to be constant as is customarily used, and show that the first law of thermodynamics with a corresponding `classical' proportionality between entropy and surface ar... |
2112.13266 | Igor Khavkine | Markus B. Fr\"ob, Igor Khavkine, Tom\'a\v{s} M\'alek, Vojt\v{e}ch
Pravda | On well-posedness and algebraic type of the five-dimensional charged
rotating black hole with two equal-magnitude angular momenta | v2: 26 pages, 1 figure, close to published version | Eur. Phys. J. C 82, 215 (2022) | 10.1140/epjc/s10052-022-10160-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study various mathematical aspects of the charged rotating black hole with
two equal-magnitude angular momenta in five dimensions. We introduce a
coordinate system that is regular on the horizon and in which Einstein-Maxwell
equations reduce to an autonomous system of ODEs. Employing Bondi and
Kruskal-like coordin... | [
{
"created": "Sat, 25 Dec 2021 18:38:47 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Mar 2022 11:39:56 GMT",
"version": "v2"
}
] | 2022-03-14 | [
[
"Fröb",
"Markus B.",
""
],
[
"Khavkine",
"Igor",
""
],
[
"Málek",
"Tomáš",
""
],
[
"Pravda",
"Vojtěch",
""
]
] | We study various mathematical aspects of the charged rotating black hole with two equal-magnitude angular momenta in five dimensions. We introduce a coordinate system that is regular on the horizon and in which Einstein-Maxwell equations reduce to an autonomous system of ODEs. Employing Bondi and Kruskal-like coordinat... |
gr-qc/9310023 | null | R. Brout and Ph. Spindel | Entropy Production from Vacuum Decay | UMH-ULB-TH 05/93 | Phys.Lett. B320 (1994) 241-244 | 10.1016/0370-2693(94)90651-3 | null | gr-qc | null | Using as dynamical variable the square of the radius of the Universe, we
solve analytically the Einstein equations in the framework of Robertson-Walker
models where a cosmological constant describing phenomenologically the vacuum
energy decays into radiation. Emphasis is put on the computation of the entropy
creation... | [
{
"created": "Fri, 15 Oct 1993 10:41:07 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Brout",
"R.",
""
],
[
"Spindel",
"Ph.",
""
]
] | Using as dynamical variable the square of the radius of the Universe, we solve analytically the Einstein equations in the framework of Robertson-Walker models where a cosmological constant describing phenomenologically the vacuum energy decays into radiation. Emphasis is put on the computation of the entropy creation. |
1105.5391 | Helvi Witek | Ulrich Sperhake, Vitor Cardoso, Christian D. Ott, Erik Schnetter and
Helvi Witek | Extreme black hole simulations: collisions of unequal mass black holes
and the point particle limit | 7 pages, 2 pages | null | 10.1103/PhysRevD.84.084038 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical relativity has seen incredible progress in the last years, and is
being applied with success to a variety of physical phenomena, from
gravitational-wave research and relativistic astrophysics to cosmology and
high-energy physics. Here we probe the limits of current numerical setups, by
studying collisions o... | [
{
"created": "Thu, 26 May 2011 20:01:18 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Sperhake",
"Ulrich",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Ott",
"Christian D.",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Witek",
"Helvi",
""
]
] | Numerical relativity has seen incredible progress in the last years, and is being applied with success to a variety of physical phenomena, from gravitational-wave research and relativistic astrophysics to cosmology and high-energy physics. Here we probe the limits of current numerical setups, by studying collisions of ... |
1110.3114 | Abril Su\'arez | T. Matos and A. Su\'arez | Finite temperature and dissipative corrections to the Gross-Pitaevskii
equation from $\lambda\Phi^4$ one loop contributions | 5 pages, accepted for publication at EPL. arXiv admin note:
substantial text overlap with arXiv:1103.5731 | T. Matos and A. Su\'arez 2011 EPL 96 56005 | 10.1209/0295-5075/96/56005 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting with a scalar field in a thermal bath and using the one loop quantum
correction potential, we rewrite the Klein-Gordon equation in its
thermodynamical representation and study the behavior of this scalar field due
to temperature variations in the equations of motion. We find the
generalization of a Gross-Pit... | [
{
"created": "Fri, 14 Oct 2011 02:43:24 GMT",
"version": "v1"
}
] | 2014-02-04 | [
[
"Matos",
"T.",
""
],
[
"Suárez",
"A.",
""
]
] | Starting with a scalar field in a thermal bath and using the one loop quantum correction potential, we rewrite the Klein-Gordon equation in its thermodynamical representation and study the behavior of this scalar field due to temperature variations in the equations of motion. We find the generalization of a Gross-Pitae... |
1407.7119 | Hristu Culetu | Hristu Culetu | On the Vaz no horizon black hole | 7 pages, no figures, minor changes, reference added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a no horizon black hole whose collapsing matter condenses close to
the event horizon and before its formation. Compared to Vaz's model [arXiv:
1407.3823], our interior geometry depends only on one parameter $r_{0}$ - the
radius of the region where quantum fluctuations are significant. While the
equation of... | [
{
"created": "Sat, 26 Jul 2014 10:35:39 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Aug 2014 12:08:27 GMT",
"version": "v2"
}
] | 2014-08-04 | [
[
"Culetu",
"Hristu",
""
]
] | We propose a no horizon black hole whose collapsing matter condenses close to the event horizon and before its formation. Compared to Vaz's model [arXiv: 1407.3823], our interior geometry depends only on one parameter $r_{0}$ - the radius of the region where quantum fluctuations are significant. While the equation of s... |
0801.3497 | Allan Joseph Michael Medved | A.J.M. Medved | A Commentary on Ruppeiner Metrics for Black Holes | 15 pages; v2, typos corrected and a few references added | Mod.Phys.Lett.A23:2149-2161,2008 | 10.1142/S0217732308027333 | null | gr-qc | null | There has been some recent controversy regarding the Ruppeiner metrics that
are induced by Reissner-Nordstrom (and Reissner-Nordstrom-like) black holes.
Most infamously, why does this family of metrics turn out to be flat, how is
this outcome to be physically understood, and can/should the formalism be
suitably modif... | [
{
"created": "Wed, 23 Jan 2008 20:55:44 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2008 09:36:22 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Medved",
"A. J. M.",
""
]
] | There has been some recent controversy regarding the Ruppeiner metrics that are induced by Reissner-Nordstrom (and Reissner-Nordstrom-like) black holes. Most infamously, why does this family of metrics turn out to be flat, how is this outcome to be physically understood, and can/should the formalism be suitably modifie... |
gr-qc/9806041 | Alejandro Corichi | Abhay Ashtekar, Alejandro Corichi and Jose. A. Zapata | Quantum Theory of Geometry III: Non-commutativity of Riemannian
Structures | 20 pages, revtex, 1 figure. Some typos corrected. References updated | Class.Quant.Grav. 15 (1998) 2955-2972 | 10.1088/0264-9381/15/10/006 | CGPG-98/6-1 | gr-qc hep-th | null | The basic framework for a systematic construction of a quantum theory of
Riemannian geometry was introduced recently. The quantum versions of Riemannian
structures --such as triad and area operators-- exhibit a non-commutativity. At
first sight, this feature is surprising because it implies that the framework
does no... | [
{
"created": "Tue, 9 Jun 1998 06:01:31 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Aug 1998 22:07:03 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Corichi",
"Alejandro",
""
],
[
"Zapata",
"Jose. A.",
""
]
] | The basic framework for a systematic construction of a quantum theory of Riemannian geometry was introduced recently. The quantum versions of Riemannian structures --such as triad and area operators-- exhibit a non-commutativity. At first sight, this feature is surprising because it implies that the framework does not ... |
1408.3691 | Erik Curiel | Erik Curiel | Classical Black Holes Are Hot | 30 pages; revised so as to address possible counter-example due to
Bob Wald, that treating black holes purely classically may lead to violations
of the GSL | null | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the early 1970s it is was realized that there is a striking formal analogy
between the Laws of black-hole mechanics and the Laws of classical
thermodynamics. Before the discovery of Hawking radiation, however, it was
generally thought that the analogy was only formal, and did not reflect a deep
connection between ... | [
{
"created": "Sat, 16 Aug 2014 01:14:38 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Nov 2014 20:04:41 GMT",
"version": "v2"
}
] | 2014-11-11 | [
[
"Curiel",
"Erik",
""
]
] | In the early 1970s it is was realized that there is a striking formal analogy between the Laws of black-hole mechanics and the Laws of classical thermodynamics. Before the discovery of Hawking radiation, however, it was generally thought that the analogy was only formal, and did not reflect a deep connection between gr... |
gr-qc/0404122 | Luca Lusanna | Luca Lusanna (INFN, Firenze) | The Chrono'Geometrical Structure of Special and General Relativity:
Towards a Background-Independent Description of the Gravitational Field and
Elementary Particles | 71 pages, invited paper for the book "Progress in General Relativity
and Quantum Cosmology Research" (Nova Science) | null | null | null | gr-qc astro-ph hep-th | null | Since the main open problem of contemporary physics is to find a unified
description of the four interactions, we present a possible scenario which,
till now only at the classical level, is able to englobe experiments ranging
from experimental space gravitation to atomic and particle physics. After a
reformulation of... | [
{
"created": "Thu, 29 Apr 2004 09:10:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
]
] | Since the main open problem of contemporary physics is to find a unified description of the four interactions, we present a possible scenario which, till now only at the classical level, is able to englobe experiments ranging from experimental space gravitation to atomic and particle physics. After a reformulation of s... |
1903.09037 | Jos\'e Villanueva | Mohsen Fathi, \'Angel Rinc\'on and J.R. Villanueva | Photons trajectories on a first order scale-dependent static BTZ black
hole | 9 pages, 6 figures | null | 10.1088/1361-6382/ab6f7c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the motion of massless particles on a static BTZ black
hole background in the context of scale-dependent gravity, which is
characterized by the running parameter $\epsilon$. Thus, by using standard
methods we obtain the equation of motions and then analytic solutions are
found. The relevant non... | [
{
"created": "Thu, 21 Mar 2019 14:53:23 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Fathi",
"Mohsen",
""
],
[
"Rincón",
"Ángel",
""
],
[
"Villanueva",
"J. R.",
""
]
] | In this paper we study the motion of massless particles on a static BTZ black hole background in the context of scale-dependent gravity, which is characterized by the running parameter $\epsilon$. Thus, by using standard methods we obtain the equation of motions and then analytic solutions are found. The relevant non-t... |
2005.14114 | Karan Fernandes | Karan Fernandes, Susovan Maity and Tapas K. Das | Emergent gravity through non-linear perturbation | The analysis concerned the specific case of Bondi flows, but holds in
a more general setting. The revised general analysis including the high and
low frequency perturbation results lie beyond the scope of a replacement | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As of now, all analogue gravity models available in the literature deal with
the emergence of an acoustic geometry through linear perturbations of transonic
fluids only. It has never been investigated whether the analogue gravity
phenomena is solely a consequence of linear perturbations, or rather a generic
property ... | [
{
"created": "Thu, 28 May 2020 16:08:58 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jun 2021 05:16:58 GMT",
"version": "v2"
}
] | 2021-06-08 | [
[
"Fernandes",
"Karan",
""
],
[
"Maity",
"Susovan",
""
],
[
"Das",
"Tapas K.",
""
]
] | As of now, all analogue gravity models available in the literature deal with the emergence of an acoustic geometry through linear perturbations of transonic fluids only. It has never been investigated whether the analogue gravity phenomena is solely a consequence of linear perturbations, or rather a generic property of... |
gr-qc/0410111 | Gianluca Calcagni | Gianluca Calcagni | Regularized dualities in patch cosmology | 5 pages, 1 figure | null | null | UPRF-2004-26 | gr-qc astro-ph hep-th | null | Following past investigations, we explore the symmetries of the
Hamilton-Jacobi cosmological equations in the generalized patch formalism
describing braneworld and tachyon scenarios. Dualities between different
patches are established and regular dual solutions, either contracting or
phantom-like, are constructed.
| [
{
"created": "Thu, 21 Oct 2004 15:08:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Calcagni",
"Gianluca",
""
]
] | Following past investigations, we explore the symmetries of the Hamilton-Jacobi cosmological equations in the generalized patch formalism describing braneworld and tachyon scenarios. Dualities between different patches are established and regular dual solutions, either contracting or phantom-like, are constructed. |
gr-qc/0702124 | Eirini Messaritaki | Eirini Messaritaki | The singular field used to calculate the self-force on non-spinning and
spinning particles | 14 pages; addressed referee's comments; published in PhysRevD | Phys.Rev.D75:104011,2007 | 10.1103/PhysRevD.75.104011 | null | gr-qc | null | The singular field of a point charge has recently been described in terms of
a new Green's function of curved spacetime. This singular field plays an
important role in the calculation of the self-force acting upon the particle.
We provide a method for calculating the singular field and a catalog of
expansions of the ... | [
{
"created": "Fri, 23 Feb 2007 19:04:31 GMT",
"version": "v1"
},
{
"created": "Tue, 15 May 2007 18:16:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Messaritaki",
"Eirini",
""
]
] | The singular field of a point charge has recently been described in terms of a new Green's function of curved spacetime. This singular field plays an important role in the calculation of the self-force acting upon the particle. We provide a method for calculating the singular field and a catalog of expansions of the si... |
0710.2013 | Shankaranarayanan S | Sudipta Sarkar (IUCAA), S. Shankaranarayanan (AEI, Golm), L.
Sriramkumar (HRI, Allahabad) | Sub-leading contributions to the black hole entropy in the brick wall
approach | 21 pages, Revtex 4; Final verson - 22 pages, References added,
Accepted in Phys. Rev. D | Phys.Rev.D78:024003,2008 | 10.1103/PhysRevD.78.024003 | AEI-2007-139 | gr-qc hep-th | null | [Abridged] We compute the canonical entropy of a quantum scalar field around
static and spherically symmetric black holes through the brick wall approach at
the higher orders (in fact, up to the sixth order in \hbar) in the WKB
approximation. We explicitly show that the brick wall model generally predicts
corrections... | [
{
"created": "Wed, 10 Oct 2007 13:59:24 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jun 2008 17:52:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sarkar",
"Sudipta",
"",
"IUCAA"
],
[
"Shankaranarayanan",
"S.",
"",
"AEI, Golm"
],
[
"Sriramkumar",
"L.",
"",
"HRI, Allahabad"
]
] | [Abridged] We compute the canonical entropy of a quantum scalar field around static and spherically symmetric black holes through the brick wall approach at the higher orders (in fact, up to the sixth order in \hbar) in the WKB approximation. We explicitly show that the brick wall model generally predicts corrections t... |
gr-qc/9404041 | Jose Pizarro de Sande Lemos | Jose' P. S. Lemos | Cylindrical Black Hole in General Relativity | null | Phys.Lett.B353:46-51,1995 | 10.1016/0370-2693(95)00533-Q | null | gr-qc | null | A black hole solution of Einstein's field equations with cylindrical symmetry
is found. Using the Hamiltonian formulation one is able to define mass and
angular momentum for the cylindrical black hole through the corresponding and
equivalent three dimensional theory. The causal structure is analyzed.
Comments: revise... | [
{
"created": "Sat, 23 Apr 1994 00:40:06 GMT",
"version": "v1"
},
{
"created": "Wed, 17 May 1995 01:05:44 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Lemos",
"Jose' P. S.",
""
]
] | A black hole solution of Einstein's field equations with cylindrical symmetry is found. Using the Hamiltonian formulation one is able to define mass and angular momentum for the cylindrical black hole through the corresponding and equivalent three dimensional theory. The causal structure is analyzed. Comments: revised ... |
gr-qc/9906094 | S. Antoci | S. Antoci and L. Mihich | A four-dimensional Hooke's law can encompass linear elasticity and
inertia | AMS LaTeX, 8 pages, Nuovo Cimento B (in press) | Nuovo Cim. B114 (1999) 873 | null | null | gr-qc | null | The question is examined, whether the formally straightforward extension of
Hooke's time-honoured stress-strain relation to the four dimensions of special
and of general relativity can make physical sense. The four-dimensional Hooke's
law is found able to account for the inertia of matter; in the flat space, slow
mot... | [
{
"created": "Wed, 23 Jun 1999 14:53:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Antoci",
"S.",
""
],
[
"Mihich",
"L.",
""
]
] | The question is examined, whether the formally straightforward extension of Hooke's time-honoured stress-strain relation to the four dimensions of special and of general relativity can make physical sense. The four-dimensional Hooke's law is found able to account for the inertia of matter; in the flat space, slow motio... |
gr-qc/0303027 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation, Spring 2003 | 28 pages, LaTeX with html.sty and psfig, 4 figures. Jorge Pullin
(editor). PDF and html versions in http://www.phys.lsu.edu/mog | null | null | MOG-21 | gr-qc | null | Contents:
* Community news:
GGR activities, by Richard Price
We hear that..., by Jorge Pullin
Institute of Physics Gravitational Physics Group, by Elizabeth Winstanley
Center for gravitational wave astronomy, by Mario Diaz
* Research briefs:
LIGO's first preliminary science run, by Gary Sanders
Quanti... | [
{
"created": "Thu, 6 Mar 2003 23:06:16 GMT",
"version": "v1"
}
] | 2009-03-10 | [
[
"Pullin",
"Jorge",
""
]
] | Contents: * Community news: GGR activities, by Richard Price We hear that..., by Jorge Pullin Institute of Physics Gravitational Physics Group, by Elizabeth Winstanley Center for gravitational wave astronomy, by Mario Diaz * Research briefs: LIGO's first preliminary science run, by Gary Sanders Quantization of area: th... |
2010.00008 | Miguel Zilhao | Taishi Ikeda, Laura Bernard, Vitor Cardoso, Miguel Zilhao | Black hole binaries and light fields: Gravitational molecules | 16 pages, 12 figures. Matches published version in PRD | Phys. Rev. D 103, 024020 (2021) | 10.1103/PhysRevD.103.024020 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that light scalars can form quasibound states around binaries. In the
nonrelativistic regime, these states are formally described by the
quantum-mechanical Schrodinger equation for a one-electron heteronuclear
diatomic molecule. We performed extensive numerical simulations of scalar
fields around black hole b... | [
{
"created": "Wed, 30 Sep 2020 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jan 2021 15:27:59 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Ikeda",
"Taishi",
""
],
[
"Bernard",
"Laura",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Zilhao",
"Miguel",
""
]
] | We show that light scalars can form quasibound states around binaries. In the nonrelativistic regime, these states are formally described by the quantum-mechanical Schrodinger equation for a one-electron heteronuclear diatomic molecule. We performed extensive numerical simulations of scalar fields around black hole bin... |
gr-qc/0008009 | Antonio Alfonso Faus | Antonio Alfonso-Faus | The Speed of Light and the Fine Structure Constant | 4 pages. ReVTeX Some minor corrections | Phys.Essays 13:46-49,2000 | 10.4006/1.3025= | null | gr-qc | null | The fine structure constant $\alpha $ includes the speed of light as given by
$\alpha =\frac{e^{2}}{4\pi \epsilon_{0}c\hbar}$. It is shown here that,
following a $TH\epsilon \mu $ formalism, interpreting the permittivity
$\epsilon_{0}$ and permeabiliy $\mu_{0}$ of free space under Lorentz local and
position invarianc... | [
{
"created": "Fri, 4 Aug 2000 09:17:06 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Aug 2000 09:17:20 GMT",
"version": "v2"
}
] | 2009-08-25 | [
[
"Alfonso-Faus",
"Antonio",
""
]
] | The fine structure constant $\alpha $ includes the speed of light as given by $\alpha =\frac{e^{2}}{4\pi \epsilon_{0}c\hbar}$. It is shown here that, following a $TH\epsilon \mu $ formalism, interpreting the permittivity $\epsilon_{0}$ and permeabiliy $\mu_{0}$ of free space under Lorentz local and position invariance,... |
2312.14071 | Robert Bluhm | Robert Bluhm and Yu Zhi | Spontaneous and Explicit Spacetime Symmetry Breaking in Einstein-Cartan
Theory with Background Fields | 27 pages | Symmetry 16 (2024) 25 | 10.3390/sym16010025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Explicit and spontaneous breaking of spacetime symmetry under
diffeomorphisms, local translations, and local Lorentz transformations due to
the presence of fixed background fields is examined in Einstein-Cartan theory.
In particular, the roles of torsion and violation of local translation
invariance are highlighted. ... | [
{
"created": "Thu, 21 Dec 2023 17:49:00 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2024 16:14:37 GMT",
"version": "v2"
}
] | 2024-01-22 | [
[
"Bluhm",
"Robert",
""
],
[
"Zhi",
"Yu",
""
]
] | Explicit and spontaneous breaking of spacetime symmetry under diffeomorphisms, local translations, and local Lorentz transformations due to the presence of fixed background fields is examined in Einstein-Cartan theory. In particular, the roles of torsion and violation of local translation invariance are highlighted. Th... |
1801.09186 | Georgia Kittou | Georgia Kittou | Is interacting vacuum viable? | 6 pages | null | 10.1016/j.physletb.2018.04.059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the asymptotic dynamics of dark energy as a mixture of pressureless
matter and an interacting vacuum component. We find that the only dynamics
compatible with current observational data favors an asymptotically vanishing
matter-vacuum energy interaction in a model where dark energy is simulated by a
generali... | [
{
"created": "Sun, 28 Jan 2018 06:09:25 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Apr 2018 10:50:58 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Apr 2018 19:53:35 GMT",
"version": "v3"
}
] | 2018-09-19 | [
[
"Kittou",
"Georgia",
""
]
] | We study the asymptotic dynamics of dark energy as a mixture of pressureless matter and an interacting vacuum component. We find that the only dynamics compatible with current observational data favors an asymptotically vanishing matter-vacuum energy interaction in a model where dark energy is simulated by a generalize... |
1608.08971 | Julio Cesar Fabris | C.R. Almeida, A.B. Batista, J.C. Fabris, P.V. Moniz | Quantum cosmology of scalar-tensor theories and self-adjointness | Latex file, 12 pages. Small changes made in the paper, and a a new
appendix added | null | 10.1063/1.4979537 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the problem of the self-adjointness for the case of a quantum
minisuperspace Hamiltonian retrieved from a Brans-Dicke (BD) action is
investigated. Our matter content is presented in terms of a perfect fluid, onto
which the Schutz's formalism will be applied. We use the von Neumann theorem
and the simil... | [
{
"created": "Wed, 31 Aug 2016 18:05:46 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Dec 2016 12:42:53 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"Almeida",
"C. R.",
""
],
[
"Batista",
"A. B.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Moniz",
"P. V.",
""
]
] | In this paper, the problem of the self-adjointness for the case of a quantum minisuperspace Hamiltonian retrieved from a Brans-Dicke (BD) action is investigated. Our matter content is presented in terms of a perfect fluid, onto which the Schutz's formalism will be applied. We use the von Neumann theorem and the similar... |
gr-qc/0006086 | Diego F. Torres | S. Capozziello, G. Lambiase and Diego F. Torres | Cerenkov radiation and scalar stars | Accepted for publication in Class. Quantum Grav | Class.Quant.Grav. 17 (2000) 3171-3182 | 10.1088/0264-9381/17/16/306 | null | gr-qc | null | We explore the possibility that a charged particle moving in the
gravitational field generated by a scalar star could radiate energy via a
recently proposed gravitational \v{C}erenkov mechanism. We numerically prove
that this is not possible for stable boson stars. We also show that soliton
stars could have \v{C}eren... | [
{
"created": "Fri, 23 Jun 2000 16:55:00 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Torres",
"Diego F.",
""
]
] | We explore the possibility that a charged particle moving in the gravitational field generated by a scalar star could radiate energy via a recently proposed gravitational \v{C}erenkov mechanism. We numerically prove that this is not possible for stable boson stars. We also show that soliton stars could have \v{C}erenko... |
1209.0718 | Chad Hanna | Kipp Cannon, Chad Hanna, Drew Keppel | A method to estimate the significance of coincident gravitational-wave
observations from compact binary coalescence | null | null | 10.1103/PhysRevD.88.024025 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coalescing compact binary systems consisting of neutron stars and/or black
holes should be detectable with upcoming advanced gravitational-wave detectors
such as LIGO, Virgo, GEO and {KAGRA}. Gravitational-wave experiments to date
have been riddled with non-Gaussian, non-stationary noise that makes it
challenging to ... | [
{
"created": "Tue, 4 Sep 2012 17:58:54 GMT",
"version": "v1"
}
] | 2013-08-09 | [
[
"Cannon",
"Kipp",
""
],
[
"Hanna",
"Chad",
""
],
[
"Keppel",
"Drew",
""
]
] | Coalescing compact binary systems consisting of neutron stars and/or black holes should be detectable with upcoming advanced gravitational-wave detectors such as LIGO, Virgo, GEO and {KAGRA}. Gravitational-wave experiments to date have been riddled with non-Gaussian, non-stationary noise that makes it challenging to as... |
gr-qc/0102053 | Howard E. Abrams | Leonard S. Abrams | The Total Space-Time of a Point-Mass When the Cosmological Constant is
Nonzero and Its Consequences for the Lake-Roeder Black Hole | 9 pages | Physica A227 (1996) 131-140 | 10.1016/0378-4371(95)00383-5 | null | gr-qc | null | Singularities associated with an incomplete space-time (S) are not
well-defined until a boundary is attached to it. Moreover, each boundary gives
rise to a different singularity structure for the resulting total space-time
(TST). Since S is compatible with a variety of boundaries, it therefore does
not represent a un... | [
{
"created": "Mon, 12 Feb 2001 23:35:11 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Abrams",
"Leonard S.",
""
]
] | Singularities associated with an incomplete space-time (S) are not well-defined until a boundary is attached to it. Moreover, each boundary gives rise to a different singularity structure for the resulting total space-time (TST). Since S is compatible with a variety of boundaries, it therefore does not represent a uniq... |
2310.02741 | Genly Le\'on | Alfredo D. Millano (Catolica del Norte U.), Genly Leon (Catolica del
Norte U. and DUT, Durban) | Averaging generalized scalar field cosmologies IV: locally rotationally
symmetric Bianchi V model | Research Program Averaging Generalized Scalar Field Cosmologies, part
IV. 40 pages, 4 compound figures. Updated references | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research focuses on scalar field cosmologies with a generalized harmonic
potential. Our attention is centred on the anisotropic LRS Bianchi I and III
metrics, Bianchi V metrics, and their isotropic limits. We provide a
comprehensive overview of the first two metrics classes and offer new findings
for Bianchi V m... | [
{
"created": "Wed, 4 Oct 2023 11:32:19 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Oct 2023 22:34:13 GMT",
"version": "v2"
}
] | 2023-10-16 | [
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Leon",
"Genly",
"",
"Catolica del\n Norte U. and DUT, Durban"
]
] | This research focuses on scalar field cosmologies with a generalized harmonic potential. Our attention is centred on the anisotropic LRS Bianchi I and III metrics, Bianchi V metrics, and their isotropic limits. We provide a comprehensive overview of the first two metrics classes and offer new findings for Bianchi V met... |
2111.09569 | Bijan Bagchi | Bijan Bagchi, Sauvik Sen | Tunneling of Hawking radiation for BTZ black hole revisited | 8 pages; accepted in Int. J. Mod. Phys. A. arXiv admin note:
substantial text overlap with arXiv:2105.12423 | Int. J. Mod. Phys. A 37, 2150252 (2022) | 10.1142/S0217751X21502523 | null | gr-qc hep-th quant-ph | http://creativecommons.org/publicdomain/zero/1.0/ | We re-examine Hawking radiation for a nonrotating (2+1)-dimensional BTZ black
hole and evaluate the transmission probability of tunneling through the barrier
of the event horizon employing the standard method of WKB approximation. Our
results are presented for both uncharged and charged cases. We also explore the
ass... | [
{
"created": "Thu, 18 Nov 2021 08:09:31 GMT",
"version": "v1"
}
] | 2022-08-18 | [
[
"Bagchi",
"Bijan",
""
],
[
"Sen",
"Sauvik",
""
]
] | We re-examine Hawking radiation for a nonrotating (2+1)-dimensional BTZ black hole and evaluate the transmission probability of tunneling through the barrier of the event horizon employing the standard method of WKB approximation. Our results are presented for both uncharged and charged cases. We also explore the assoc... |
0802.0043 | Jiliang Jing | Jiliang Jing, Qiyuan Pan | Quasinormal modes and second order thermodynamic phase transition for
Reissner-Nordstr\"om black hole | 10 pages, 5 figures | Phys.Lett.B660:13-18,2008 | 10.1016/j.physletb.2007.11.039 | null | gr-qc astro-ph hep-th | null | The relation between the quasinormal modes (QNMs) and the second order
thermodynamic phase transition (SOTPT) for the Reissner-Nordstr\"om (RN) black
hole is studied. It is shown that the quasinormal frequencies of the RN black
hole start to get a spiral-like shape in the complex $\omega$ plane and both
the real and ... | [
{
"created": "Fri, 1 Feb 2008 01:36:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jing",
"Jiliang",
""
],
[
"Pan",
"Qiyuan",
""
]
] | The relation between the quasinormal modes (QNMs) and the second order thermodynamic phase transition (SOTPT) for the Reissner-Nordstr\"om (RN) black hole is studied. It is shown that the quasinormal frequencies of the RN black hole start to get a spiral-like shape in the complex $\omega$ plane and both the real and im... |
1801.03745 | Alexander Isayev | A. A. Isayev | General relativistic polytropes in anisotropic stars | 27 pages, including 4 figures and 2 tables | Phys. Rev. D 96: 083007, 2017 | 10.1103/PhysRevD.96.083007 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically symmetric relativistic stars with the polytropic equation of
state (EoS), which possess the local pressure anisotropy, are considered within
the framework of general relativity. The generalized Lane-Emden equations are
derived for the arbitrary anisotropy parameter $\Delta=p_t-p_r$ ($p_t$ and
$p_r$ being ... | [
{
"created": "Thu, 11 Jan 2018 13:19:19 GMT",
"version": "v1"
}
] | 2018-01-12 | [
[
"Isayev",
"A. A.",
""
]
] | Spherically symmetric relativistic stars with the polytropic equation of state (EoS), which possess the local pressure anisotropy, are considered within the framework of general relativity. The generalized Lane-Emden equations are derived for the arbitrary anisotropy parameter $\Delta=p_t-p_r$ ($p_t$ and $p_r$ being th... |
2312.17214 | Sang-Eon Bak | Sang-Eon Bak, Maulik Parikh, Sudipta Sarkar, and Francesco Setti | Quantum-Gravitational Null Raychaudhuri Equation | 15 pages, 1 figure, v2. published version in JHEP | JHEP 07 (2024) 214 | 10.1007/JHEP07(2024)214 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider a congruence of null geodesics in the presence of a quantized
spacetime metric. The coupling to a quantum metric induces fluctuations in the
congruence; we calculate the change in the area of a pencil of geodesics
induced by such fluctuations. For the gravitational field in its vacuum state,
we find that ... | [
{
"created": "Thu, 28 Dec 2023 18:45:47 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2024 20:34:36 GMT",
"version": "v2"
}
] | 2024-07-29 | [
[
"Bak",
"Sang-Eon",
""
],
[
"Parikh",
"Maulik",
""
],
[
"Sarkar",
"Sudipta",
""
],
[
"Setti",
"Francesco",
""
]
] | We consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics induced by such fluctuations. For the gravitational field in its vacuum state, we find that qu... |
0904.4572 | Marco Pizzi | M. Pizzi | The time factor in the semi-classical approach to the Hawking radiation | 10 pages, submitted 30/12/2008; v2 minor changes | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hawking radiation in the semi-classical approach is re-considered. In the
so-called "Angheben method" for the calculation of the imaginary part of the
action it was missed the temporal part contribution. This has been recently
noticed by Akhmedov et \textsl{al.}, but also there the time part was not
properly cons... | [
{
"created": "Wed, 29 Apr 2009 10:28:42 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jun 2009 09:58:05 GMT",
"version": "v2"
}
] | 2009-06-25 | [
[
"Pizzi",
"M.",
""
]
] | The Hawking radiation in the semi-classical approach is re-considered. In the so-called "Angheben method" for the calculation of the imaginary part of the action it was missed the temporal part contribution. This has been recently noticed by Akhmedov et \textsl{al.}, but also there the time part was not properly consid... |
2207.08508 | Miloslav Znojil | Miloslav Znojil | Wheeler-DeWitt equation and the applicability of crypto-Hermitian
interaction representation in quantum cosmology | 33 pp., 3 pictures | Universe 8 (2022) 385 | 10.3390/universe8070385 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently, Wang with Stankiewicz (Phys. Lett. B 800 (2020) 135106) opposed the
widespread belief that due to quantization, the Big Bang singularity {\em must}
necessarily get smeared and replaced by a non-singular "Big Bounce" process.
Their claim is supported in a methodically independent manner in which just a
highl... | [
{
"created": "Mon, 18 Jul 2022 10:58:24 GMT",
"version": "v1"
}
] | 2022-12-21 | [
[
"Znojil",
"Miloslav",
""
]
] | Recently, Wang with Stankiewicz (Phys. Lett. B 800 (2020) 135106) opposed the widespread belief that due to quantization, the Big Bang singularity {\em must} necessarily get smeared and replaced by a non-singular "Big Bounce" process. Their claim is supported in a methodically independent manner in which just a highly ... |
gr-qc/0612129 | Orfeu Bertolami | O. Bertolami and C. Carvalho | Brane Lorentz Symmetry from Lorentz Breaking in the Bulk | 11 pages, Latex file with IOP style. To appear in Journal of Physics:
Conference Series. Based on talk present by O.B. at the Third International
Workshop DICE2006, Quantum Mechanics between Decoherence and Determinism: new
aspects from particle physics to cosmology, 11-15 September 2006, Piombino,
Italy. Typos... | J.Phys.Conf.Ser.67:012009,2007 | 10.1088/1742-6596/67/1/012009 | null | gr-qc | null | We propose the mechanism of spontaneous symmetry breaking of a bulk vector
field as a way to generate the selection of bulk dimensions invisible to the
standard model confined to the brane. By assigning a non-vanishing vacuum value
to the vector field, a direction is singled out in the bulk vacuum, thus
breaking the ... | [
{
"created": "Wed, 20 Dec 2006 15:16:03 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Dec 2006 14:16:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bertolami",
"O.",
""
],
[
"Carvalho",
"C.",
""
]
] | We propose the mechanism of spontaneous symmetry breaking of a bulk vector field as a way to generate the selection of bulk dimensions invisible to the standard model confined to the brane. By assigning a non-vanishing vacuum value to the vector field, a direction is singled out in the bulk vacuum, thus breaking the bu... |
2012.15001 | Jianfei Xu | Jianfei Xu | Gravitational waves in gauge theory gravity with a negative cosmological
constant | 21 pages, 3 figures | Class.Quant.Grav. 39 (2022) 17, 175005 | 10.1088/1361-6382/ac8092 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we discuss the gravitational waves in the context of gauge
theory gravity with a negative cosmological constant. The gauge theory gravity
is a gravity theory under gauge formulation in the language of geometric
algebra. In contrast to general relativity, the background spacetime in gauge
theory gravity... | [
{
"created": "Wed, 30 Dec 2020 01:46:26 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jan 2021 07:59:20 GMT",
"version": "v2"
},
{
"created": "Sun, 21 Aug 2022 07:07:21 GMT",
"version": "v3"
},
{
"created": "Fri, 9 Sep 2022 07:07:11 GMT",
"version": "v4"
}
] | 2022-09-12 | [
[
"Xu",
"Jianfei",
""
]
] | In this paper, we discuss the gravitational waves in the context of gauge theory gravity with a negative cosmological constant. The gauge theory gravity is a gravity theory under gauge formulation in the language of geometric algebra. In contrast to general relativity, the background spacetime in gauge theory gravity i... |
gr-qc/9708053 | Madore | J. Madore, L.A. Saeger | Topology at the Planck Length | Orsay Preprint 97/34, 17 pages, Latex | Class.Quant.Grav. 15 (1998) 811-826 | 10.1088/0264-9381/15/4/009 | null | gr-qc hep-th | null | A basic arbitrariness in the determination of the topology of a manifold at
the Planck length is discussed. An explicit example is given of a `smooth'
change in topology from the 2-sphere to the 2-torus through a sequence of
noncommuting geometries. Applications are considered to the theory of D-branes
within the con... | [
{
"created": "Fri, 22 Aug 1997 15:30:57 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Madore",
"J.",
""
],
[
"Saeger",
"L. A.",
""
]
] | A basic arbitrariness in the determination of the topology of a manifold at the Planck length is discussed. An explicit example is given of a `smooth' change in topology from the 2-sphere to the 2-torus through a sequence of noncommuting geometries. Applications are considered to the theory of D-branes within the conte... |
1404.7123 | Mubasher Jamil | Mubasher Jamil, Saqib Hussain, Bushra Majeed | Dynamics of Particles Around a Schwarzschild-like Black Hole in the
Presence of Quintessence and Magnetic Field | 25 pages, 17 figures, accepted for publication in the European
Physical Journal C | Eur. Phys. J. C (2015) 75:24 | 10.1140/epjc/s10052-014-3230-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the dynamics of a neutral and a charged particle around a
static and spherically symmetric black hole in the presence of quintessence
matter and external magnetic field. We explore the conditions under which the
particle moving around the black hole could escape to infinity after colliding
with another... | [
{
"created": "Mon, 28 Apr 2014 13:36:26 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Nov 2014 04:26:43 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Jan 2015 09:49:57 GMT",
"version": "v3"
}
] | 2015-01-26 | [
[
"Jamil",
"Mubasher",
""
],
[
"Hussain",
"Saqib",
""
],
[
"Majeed",
"Bushra",
""
]
] | We investigate the dynamics of a neutral and a charged particle around a static and spherically symmetric black hole in the presence of quintessence matter and external magnetic field. We explore the conditions under which the particle moving around the black hole could escape to infinity after colliding with another p... |
0709.3958 | Sophonie Blaise Tchapnda | S. B. Tchapnda | The plane symmetric Einstein-dust system with positive cosmological
constant | 12 pages | null | null | null | gr-qc | null | The Einstein equations with a positive cosmological constant are coupled to
the pressureless perfect fluid matter in plane symmetry. Under suitable
restrictions on the initial data, the resulting Einstein-dust system is proved
to have a global classical solution in the future time direction. Some late
time asymptotic... | [
{
"created": "Tue, 25 Sep 2007 14:12:39 GMT",
"version": "v1"
}
] | 2007-09-26 | [
[
"Tchapnda",
"S. B.",
""
]
] | The Einstein equations with a positive cosmological constant are coupled to the pressureless perfect fluid matter in plane symmetry. Under suitable restrictions on the initial data, the resulting Einstein-dust system is proved to have a global classical solution in the future time direction. Some late time asymptotic p... |
1303.3379 | Mikhail Gorbatenko | M.V. Gorbatenko, V.P. Neznamov | Quantum-mechanical nonequivalence of metrics of centrally symmetric
uncharged gravitational field | 21 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum-mechanical analysis shows that the metrics of a centrally symmetric
uncharged gravitational field, which are exact solutions of the general
relativity equations, are physically non-equivalent. The classical
Schwarzschield metric and the Schwarzschild metrics in isotropic and harmonic
coordinates provide for t... | [
{
"created": "Thu, 14 Mar 2013 08:44:18 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jul 2013 16:41:03 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Aug 2013 06:05:15 GMT",
"version": "v3"
}
] | 2013-08-05 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Neznamov",
"V. P.",
""
]
] | Quantum-mechanical analysis shows that the metrics of a centrally symmetric uncharged gravitational field, which are exact solutions of the general relativity equations, are physically non-equivalent. The classical Schwarzschield metric and the Schwarzschild metrics in isotropic and harmonic coordinates provide for the... |
2303.16326 | Erickson Tjoa | Erickson Tjoa | Fuzzy spacetime: fundamental limits of quantum-optical holographic bulk
reconstruction | 10 pages, no figure. Essay written for the Gravity Research
Foundation 2023 Awards for Essays on Gravitation; v2: fixed attribution and
typos | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Essay we construct a concrete, non-perturbative realization of metric
reconstruction using quantum-optical model of particle detectors in
relativistic quantum information. The non-perturbative approach allows us to
realize a version of "short-distance physics corresponds to poor statistics"
idea by Kempf whic... | [
{
"created": "Tue, 28 Mar 2023 21:59:05 GMT",
"version": "v1"
},
{
"created": "Tue, 30 May 2023 18:17:42 GMT",
"version": "v2"
}
] | 2023-06-01 | [
[
"Tjoa",
"Erickson",
""
]
] | In this Essay we construct a concrete, non-perturbative realization of metric reconstruction using quantum-optical model of particle detectors in relativistic quantum information. The non-perturbative approach allows us to realize a version of "short-distance physics corresponds to poor statistics" idea by Kempf which ... |
gr-qc/0209073 | Michael T. Anderson | Michael T. Anderson | Regularity for Lorentz Metrics under Curvature Bounds | 18pp | J.Math.Phys. 44 (2003) 2994-3012 | 10.1063/1.1580199 | null | gr-qc math.DG | null | Let (M, g) be an (n+1) dimensional space-time, with bounded curvature with
respect to a bounded framing. If (M, g) is vacuum or satisfies a mild condition
on the stress-energy tensor, then we show that (M, g) locally admits coordinate
systems in which the Lorentz metric is well-controlled in the (space-time)
Sobolev ... | [
{
"created": "Fri, 20 Sep 2002 16:20:41 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Anderson",
"Michael T.",
""
]
] | Let (M, g) be an (n+1) dimensional space-time, with bounded curvature with respect to a bounded framing. If (M, g) is vacuum or satisfies a mild condition on the stress-energy tensor, then we show that (M, g) locally admits coordinate systems in which the Lorentz metric is well-controlled in the (space-time) Sobolev sp... |
2408.01205 | Lai Zhao | Lai Zhao, Meirong Tang, Zhaoyi Xu | Gravitational Lensing Effects and Observational Behaviors of the
Rotating Short-Hairy Black Hole | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The successful capture of black hole(BH) images by the Event Horizon
Telescope(EHT) has sparked a surge in research on strong gravitational lensing,
providing new methods for studying behavior near the event horizon of BHs. For
the short-hair that has significant effects only near the BH event horizon,
studying its s... | [
{
"created": "Fri, 2 Aug 2024 11:38:08 GMT",
"version": "v1"
}
] | 2024-08-05 | [
[
"Zhao",
"Lai",
""
],
[
"Tang",
"Meirong",
""
],
[
"Xu",
"Zhaoyi",
""
]
] | The successful capture of black hole(BH) images by the Event Horizon Telescope(EHT) has sparked a surge in research on strong gravitational lensing, providing new methods for studying behavior near the event horizon of BHs. For the short-hair that has significant effects only near the BH event horizon, studying its str... |
gr-qc/0703051 | L\'aszl\'o \'A Gergely | L\'aszl\'o \'A. Gergely | Black holes on cosmological branes | to appear in the Proceedings of the Eleventh Marcel Grossmann Meeting
2006, World Scientific, Singapore (2007) | null | 10.1142/9789812834300_0524 | null | gr-qc | null | While in general relativity black holes can be freely embedded into a
cosmological background, the same problem in brane-worlds is much more
cumbersome. We present here the results obtained so far in the explicit
constructions of such space-times. We also discuss gravitational collapse in
this context.
| [
{
"created": "Thu, 8 Mar 2007 11:15:11 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Gergely",
"László Á.",
""
]
] | While in general relativity black holes can be freely embedded into a cosmological background, the same problem in brane-worlds is much more cumbersome. We present here the results obtained so far in the explicit constructions of such space-times. We also discuss gravitational collapse in this context. |
2405.03719 | Christian Wiesendanger | C Wiesendanger | Schwarzschild Solution within a new renormalizable SO(1,3) Gauge Field
Theory of Gravitation | 16 Pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of the Schwarzschild solution is demonstrated within a new
SO(1,3) gauge field theory whose fundamental gauge field B is of dimension one
allowing for the renormalizability of the full quantum theory. On the other
hand the classically dominant term of the gauge field action can be expressed
in terms of ... | [
{
"created": "Sun, 5 May 2024 16:43:29 GMT",
"version": "v1"
}
] | 2024-05-08 | [
[
"Wiesendanger",
"C",
""
]
] | The existence of the Schwarzschild solution is demonstrated within a new SO(1,3) gauge field theory whose fundamental gauge field B is of dimension one allowing for the renormalizability of the full quantum theory. On the other hand the classically dominant term of the gauge field action can be expressed in terms of a ... |
gr-qc/0009033 | D. V. Ahluwalia | D. V. Ahluwalia | Principle of equivalence and wave-particle duality in quantum gravity | Invited talk at the III Workshop of DGFM-SMF, Nov. 28-Dec. 03, 1999,
Leon, Mexico | Memorias del III Taller de la DGFM-SMF, 2000. ``Aspectos de
Gravitacion y Fisica-Matematica,'' Editors: N. Breton, O. Pimentel, J.
Socorro | null | null | gr-qc | null | This talk presents: (a) A quantum-mechanically induced violation of the
principle of equivalence, and (b) Gravitationally-induced modification to the
wave particle duality. In this context I note that the agreement between the
predictions of general relativity and observations of the energy loss due to
gravitational ... | [
{
"created": "Mon, 11 Sep 2000 16:38:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ahluwalia",
"D. V.",
""
]
] | This talk presents: (a) A quantum-mechanically induced violation of the principle of equivalence, and (b) Gravitationally-induced modification to the wave particle duality. In this context I note that the agreement between the predictions of general relativity and observations of the energy loss due to gravitational wa... |
1506.02505 | Ahmad Sheykhi | A. Sheykhi, M. H. Dehghani and S. Ghaffari | New holographic dark energy model inspired by the DGP braneworld | 11 pages | IJMPD, Vol 25, (2016) 1650018 | 10.1142/S0218271816500188 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | The energy density of the holographic dark energy is based on the area law of
entropy, and thus any modification of the area law leads to a modified
holographic energy density. Inspired by the entropy expression associated with
the apparent horizon of a Friedmann-Robertson-Walker (FRW) Universe in DGP
braneworld, we ... | [
{
"created": "Fri, 5 Jun 2015 05:38:48 GMT",
"version": "v1"
}
] | 2016-03-16 | [
[
"Sheykhi",
"A.",
""
],
[
"Dehghani",
"M. H.",
""
],
[
"Ghaffari",
"S.",
""
]
] | The energy density of the holographic dark energy is based on the area law of entropy, and thus any modification of the area law leads to a modified holographic energy density. Inspired by the entropy expression associated with the apparent horizon of a Friedmann-Robertson-Walker (FRW) Universe in DGP braneworld, we pr... |
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