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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1405.2803 | Bogeun Gwak | Bogeun Gwak and Bum-Hoon Lee | Instability of Rotating Anti-de Sitter Black Holes | 11 pages, 5 figures, published version in PRD | Phys. Rev. D 91, 064020 (2015) | 10.1103/PhysRevD.91.064020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the instability of higher-dimensional rotating anti-de Sitter black
holes through fragmentation. Fragmentation occurs when black holes rotate too
fast to sustain their horizon, and then the black holes are broken into small
pieces. Using this process, we test the stability of AdS black holes and
discover the... | [
{
"created": "Mon, 12 May 2014 15:27:19 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Mar 2015 07:17:15 GMT",
"version": "v2"
}
] | 2015-03-18 | [
[
"Gwak",
"Bogeun",
""
],
[
"Lee",
"Bum-Hoon",
""
]
] | We study the instability of higher-dimensional rotating anti-de Sitter black holes through fragmentation. Fragmentation occurs when black holes rotate too fast to sustain their horizon, and then the black holes are broken into small pieces. Using this process, we test the stability of AdS black holes and discover the d... |
2402.10501 | Jean-Luc Lehners | Jean-Luc Lehners | NUTs, Bolts and Stokes Phenomena in the No-Boundary Wave Function | 27 pages, 14 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we revisit and extend the analysis of the no-boundary wave
function for the minisuperspace model in which the universe is described by a
biaxial Bianchi IX metric. As matter content, we simply assume a positive
cosmological constant. We find that two Stokes phenomena occur, at large
squashing parameters... | [
{
"created": "Fri, 16 Feb 2024 08:20:31 GMT",
"version": "v1"
}
] | 2024-02-19 | [
[
"Lehners",
"Jean-Luc",
""
]
] | In this note, we revisit and extend the analysis of the no-boundary wave function for the minisuperspace model in which the universe is described by a biaxial Bianchi IX metric. As matter content, we simply assume a positive cosmological constant. We find that two Stokes phenomena occur, at large squashing parameters o... |
0910.3484 | Vitaly Melnikov Nikolaevich | V. N. Melnikov | Variations of constants as a test of gravity, cosmology and unified
models | 21 pages, Latex | Grav. Cosmol. 13, No. 2, 81-100 (2007) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitation as a fundamental interaction that governs all phenomena at large
and very small scales, but still not well understood at a quantum level, is a
cardinal missing link in unification of all physical interactions. Discovery of
the present acceleration of the Universe, the dark matter and dark energy
problems ... | [
{
"created": "Mon, 19 Oct 2009 09:01:44 GMT",
"version": "v1"
}
] | 2009-11-30 | [
[
"Melnikov",
"V. N.",
""
]
] | Gravitation as a fundamental interaction that governs all phenomena at large and very small scales, but still not well understood at a quantum level, is a cardinal missing link in unification of all physical interactions. Discovery of the present acceleration of the Universe, the dark matter and dark energy problems ar... |
0803.2003 | Stefan Hollands | S. Hollands and R. M. Wald | Axiomatic quantum field theory in curved spacetime | Latex, 44 pages, 2 figures | Commun.Math.Phys.293:85-125,2010 | 10.1007/s00220-009-0880-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The usual formulations of quantum field theory in Minkowski spacetime make
crucial use of features--such as Poincare invariance and the existence of a
preferred vacuum state--that are very special to Minkowski spacetime. In order
to generalize the formulation of quantum field theory to arbitrary globally
hyperbolic c... | [
{
"created": "Thu, 13 Mar 2008 16:34:29 GMT",
"version": "v1"
}
] | 2009-12-15 | [
[
"Hollands",
"S.",
""
],
[
"Wald",
"R. M.",
""
]
] | The usual formulations of quantum field theory in Minkowski spacetime make crucial use of features--such as Poincare invariance and the existence of a preferred vacuum state--that are very special to Minkowski spacetime. In order to generalize the formulation of quantum field theory to arbitrary globally hyperbolic cur... |
2006.14153 | David Alejandro Tamayo Ram\'irez | David Tamayo | Thermodynamics of viscous dark energy for the late future time universe | 12 pages | Rev. Mex. Fis., 68, 2 (2022) | 10.31349/RevMexFis.68.020704 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we explore the thermodynamic aspects of dark energy for late
future time universe in two different scenarios: as a perfect fluid with
constant and variable equation of state parameter; and as dissipative fluid
described by a barotropic equation of state with bulk viscosity in the
framework of the Eckart ... | [
{
"created": "Thu, 25 Jun 2020 03:22:13 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Mar 2022 21:26:57 GMT",
"version": "v2"
}
] | 2022-03-03 | [
[
"Tamayo",
"David",
""
]
] | In this work we explore the thermodynamic aspects of dark energy for late future time universe in two different scenarios: as a perfect fluid with constant and variable equation of state parameter; and as dissipative fluid described by a barotropic equation of state with bulk viscosity in the framework of the Eckart th... |
gr-qc/0703080 | Thomas Sotiriou | Thomas P. Sotiriou, Stefano Liberati | Reply to "Can gravitational dynamics be obtained by diffeomorphism
invariance of action?" | Accepted for publication in PRD | Phys.Rev.D75:068502,2007 | 10.1103/PhysRevD.75.068502 | null | gr-qc | null | In a previous work we showed that, in a suitable setting, one can use
diffeomorphism invariance in order to derive gravitational field equations from
boundary terms of the gravitational action. Standing by our results we reply
here to a recent comment questioning their validity.
| [
{
"created": "Wed, 14 Mar 2007 15:48:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Liberati",
"Stefano",
""
]
] | In a previous work we showed that, in a suitable setting, one can use diffeomorphism invariance in order to derive gravitational field equations from boundary terms of the gravitational action. Standing by our results we reply here to a recent comment questioning their validity. |
1504.00286 | Yosef Zlochower | Yosef Zlochower, Hiroyuki Nakano, Bruno C. Mundim, Manuela Campanelli,
Scott Noble, Miguel Zilhao | Inspiraling black-hole binary spacetimes: Challenges in transitioning
from analytical to numerical techniques | Accepted for publication in PRD, 14 pages, 21 figures, revtex 4-1 | Phys. Rev. D 93, 124072 (2016) | 10.1103/PhysRevD.93.124072 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore how a recently developed analytical black-hole binary spacetime
can be extended using numerical simulations to go beyond the slow-inspiral
phase. The analytic spacetime solves the Einstein field equations
approximately, with the approximation error becoming progressively smaller the
more separated the bina... | [
{
"created": "Wed, 1 Apr 2015 16:40:33 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jun 2016 15:08:41 GMT",
"version": "v2"
}
] | 2016-07-05 | [
[
"Zlochower",
"Yosef",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Mundim",
"Bruno C.",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Noble",
"Scott",
""
],
[
"Zilhao",
"Miguel",
""
]
] | We explore how a recently developed analytical black-hole binary spacetime can be extended using numerical simulations to go beyond the slow-inspiral phase. The analytic spacetime solves the Einstein field equations approximately, with the approximation error becoming progressively smaller the more separated the binary... |
gr-qc/9909007 | Fabio Finelli | F. Finelli (Ist. TeSRE & Bologna U. & INFN, Bologna), A. Gruppuso, G.
Venturi (Bologna U. & INFN, Bologna) | Quantum Fields in an Expanding Universe | 15 pp, no figures, accepted for publication in Class. Quantum Grav | Class.Quant.Grav.16:3923-3935,1999 | 10.1088/0264-9381/16/12/310 | null | gr-qc | null | We extend our analysis for scalar fields in a Robertson-Walker metric to the
electromagnetic field and Dirac fields by the method of invariants. The issue
of the relation between conformal properties and particle production is
re-examined and it is verified that the electromagnetic and massless spinor
actions are con... | [
{
"created": "Thu, 2 Sep 1999 10:25:08 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Finelli",
"F.",
"",
"Ist. TeSRE & Bologna U. & INFN, Bologna"
],
[
"Gruppuso",
"A.",
"",
"Bologna U. & INFN, Bologna"
],
[
"Venturi",
"G.",
"",
"Bologna U. & INFN, Bologna"
]
] | We extend our analysis for scalar fields in a Robertson-Walker metric to the electromagnetic field and Dirac fields by the method of invariants. The issue of the relation between conformal properties and particle production is re-examined and it is verified that the electromagnetic and massless spinor actions are confo... |
gr-qc/0406001 | Timothy Clifton | T. Clifton, D. F. Mota and J. D. Barrow | Inhomogeneous Gravity | 15 pages, 15 figures. Submitted to MNRAS. References added | Mon.Not.Roy.Astron.Soc.358:601,2005 | 10.1111/j.1365-2966.2005.08831.x | DAMTP-2004-57 | gr-qc astro-ph | null | We study the inhomogeneous cosmological evolution of the Newtonian
gravitational 'constant' G in the framework of scalar-tensor theories. We
investigate the differences that arise between the evolution of G in the
background universes and in local inhomogeneities that have separated out from
the global expansion. Exa... | [
{
"created": "Tue, 1 Jun 2004 17:49:30 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2005 11:19:52 GMT",
"version": "v2"
}
] | 2009-09-29 | [
[
"Clifton",
"T.",
""
],
[
"Mota",
"D. F.",
""
],
[
"Barrow",
"J. D.",
""
]
] | We study the inhomogeneous cosmological evolution of the Newtonian gravitational 'constant' G in the framework of scalar-tensor theories. We investigate the differences that arise between the evolution of G in the background universes and in local inhomogeneities that have separated out from the global expansion. Exact... |
gr-qc/0409078 | Burak Himmeto\u{g}lu | Burak Himmetoglu | Analysis of Dynamic Axial-Symmetric Shells | 11 pages, Revtex4; minor changes, added reference, typos added | null | null | null | gr-qc hep-th | null | The aim of this work is to analyze the dynamical behavior of relativistic
infinite axial-symmetric shells with flat interior and a radiation filled
curved exterior spacetimes. It will be proven, by the use of conservation
equations of Israel, that the given configuration does not let expansion or
collapse of the shel... | [
{
"created": "Mon, 20 Sep 2004 19:24:20 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 2004 10:17:13 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Oct 2004 15:12:04 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Himmetoglu",
"Burak",
""
]
] | The aim of this work is to analyze the dynamical behavior of relativistic infinite axial-symmetric shells with flat interior and a radiation filled curved exterior spacetimes. It will be proven, by the use of conservation equations of Israel, that the given configuration does not let expansion or collapse of the shell ... |
gr-qc/0612038 | Wu Ning | Ning Wu | Spin-Spin Interactions in Gauge Theory of Gravity, Violation of Weak
Equivalence Principle and New Classical Test of General Relativity | 17 pages, no figure | Commun.Theor.Phys.49:1533-1540,2008 | 10.1088/0253-6102/49/6/39 | null | gr-qc | null | For a long time, it is generally believed that spin-spin interactions can
only exist in a theory where Lorentz symmetry is gauged, and a theory with
spin-spin interactions is not perturbatively renormalizable. But this is not
true. By studying the motion of a spinning particle in gravitational field, it
is found that... | [
{
"created": "Wed, 6 Dec 2006 13:15:06 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2007 04:08:13 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Wu",
"Ning",
""
]
] | For a long time, it is generally believed that spin-spin interactions can only exist in a theory where Lorentz symmetry is gauged, and a theory with spin-spin interactions is not perturbatively renormalizable. But this is not true. By studying the motion of a spinning particle in gravitational field, it is found that t... |
gr-qc/0108070 | Koji Uryu | John L. Friedman, Koji Uryu and Masaru Shibata | Thermodynamics of binary black holes and neutron stars | 26 pages, revised version, modified appendix A, to appear in PRD | Phys.Rev.D65:064035,2002; Erratum-ibid.D70:129904,2004 | 10.1103/PhysRevD.65.064035 10.1103/PhysRevD.70.129904 | null | gr-qc astro-ph | null | We consider compact binary systems, modeled in general relativity as vacuum
or perfect-fluid spacetimes with a helical Killing vector k^\alpha,
heuristically, the generator of time-translations in a corotating frame.
Systems that are stationary in this sense are not asymptotically flat, but have
asymptotic behavior c... | [
{
"created": "Tue, 28 Aug 2001 23:05:38 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Dec 2001 21:01:08 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Friedman",
"John L.",
""
],
[
"Uryu",
"Koji",
""
],
[
"Shibata",
"Masaru",
""
]
] | We consider compact binary systems, modeled in general relativity as vacuum or perfect-fluid spacetimes with a helical Killing vector k^\alpha, heuristically, the generator of time-translations in a corotating frame. Systems that are stationary in this sense are not asymptotically flat, but have asymptotic behavior cor... |
2403.18533 | Ryotaku Suzuki | Eiki Kagohashi, Ryotaku Suzuki, Shinya Tomizawa | Innermost stable circular orbits around a spinning black hole binary | 20 pages, 11 figures | null | null | TTI-MATHPHYS-28 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the exact solution that describes multi-centered rotating black holes,
recently discovered by Teo and Wan, we investigate the innermost stable
circular orbit (ISCO) for massive particles and the circular orbit for massless
particles moving around a spinning black hole binary. We assume equal masses
$M_1 = M_2=m... | [
{
"created": "Wed, 27 Mar 2024 13:11:09 GMT",
"version": "v1"
}
] | 2024-03-28 | [
[
"Kagohashi",
"Eiki",
""
],
[
"Suzuki",
"Ryotaku",
""
],
[
"Tomizawa",
"Shinya",
""
]
] | Using the exact solution that describes multi-centered rotating black holes, recently discovered by Teo and Wan, we investigate the innermost stable circular orbit (ISCO) for massive particles and the circular orbit for massless particles moving around a spinning black hole binary. We assume equal masses $M_1 = M_2=m$ ... |
1602.03844 | LVC Publications | The LIGO Scientific Collaboration, the Virgo Collaboration | Characterization of transient noise in Advanced LIGO relevant to
gravitational wave signal GW150914 | null | null | 10.1088/0264-9381/33/13/134001 | null | gr-qc astro-ph.HE astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On September 14, 2015, a gravitational wave signal from a coalescing black
hole binary system was observed by the Advanced LIGO detectors. This paper
describes the transient noise backgrounds used to determine the significance of
the event (designated GW150914) and presents the results of investigations into
potentia... | [
{
"created": "Thu, 11 Feb 2016 19:26:51 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2016 00:02:23 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Jun 2016 00:27:07 GMT",
"version": "v3"
}
] | 2016-06-22 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
]
] | On September 14, 2015, a gravitational wave signal from a coalescing black hole binary system was observed by the Advanced LIGO detectors. This paper describes the transient noise backgrounds used to determine the significance of the event (designated GW150914) and presents the results of investigations into potential ... |
1910.08688 | Rodrigo Avalos | Rodrigo Avalos and Jorge H. Lira | Einstein-type elliptic systems | null | Ann. Henri Poincar\'e, 2022 | 10.1007/s00023-022-01180-2 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyse semi-linear systems of partial differential
equations which are motivated by the conformal formulation of the Einstein
constraint equations coupled with realistic physical fields on asymptotically
Euclidean (AE) manifolds. In particular, electromagnetic fields give rise to
this kind of system... | [
{
"created": "Sat, 19 Oct 2019 03:16:55 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2019 19:19:24 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Nov 2021 23:41:40 GMT",
"version": "v3"
}
] | 2022-04-18 | [
[
"Avalos",
"Rodrigo",
""
],
[
"Lira",
"Jorge H.",
""
]
] | In this paper we analyse semi-linear systems of partial differential equations which are motivated by the conformal formulation of the Einstein constraint equations coupled with realistic physical fields on asymptotically Euclidean (AE) manifolds. In particular, electromagnetic fields give rise to this kind of system. ... |
1311.5327 | Jian-Yang Zhu | Xiao-Min Zhang and Jian-Yang Zhu | Consistency of the tachyon warm inflationary universe models | 10 pages, 0 figures, accepted for publication in Journal of Cosmology
and Astroparticle Physics (JCAP) | JCAP 02(2014)005 | 10.1088/1475-7516/2014/02/005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study concerns the consistency of the tachyon warm inflationary models.
A linear stability analysis is performed to find the slow-roll conditions,
characterized by the potential slow-roll (PSR) parameters, for the existence of
a tachyon warm inflationary attractor in the system. The PSR parameters in the
tachyon... | [
{
"created": "Thu, 21 Nov 2013 08:04:07 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2014 17:29:35 GMT",
"version": "v2"
}
] | 2014-02-25 | [
[
"Zhang",
"Xiao-Min",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | This study concerns the consistency of the tachyon warm inflationary models. A linear stability analysis is performed to find the slow-roll conditions, characterized by the potential slow-roll (PSR) parameters, for the existence of a tachyon warm inflationary attractor in the system. The PSR parameters in the tachyon w... |
2012.03856 | Yungui Gong | Qing Gao, Yungui Gong, Zhu Yi | Primordial black holes and secondary gravitational waves from natural
inflation | mathced with the published version | Nucl. Phys. B 969 (2021) 115480 | 10.1016/j.nuclphysb.2021.115480 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The production of primordial black hole (PBH) dark matter (DM) and the
generation of scalar induced secondary gravitational waves by using the
enhancement mechanism with a peak function in the non-canonical kinetic term in
natural inflation is discussed. We show explicitly that the power spectrum for
the primordial c... | [
{
"created": "Mon, 7 Dec 2020 17:06:25 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Apr 2022 12:31:35 GMT",
"version": "v2"
},
{
"created": "Sat, 7 May 2022 04:18:43 GMT",
"version": "v3"
}
] | 2022-05-10 | [
[
"Gao",
"Qing",
""
],
[
"Gong",
"Yungui",
""
],
[
"Yi",
"Zhu",
""
]
] | The production of primordial black hole (PBH) dark matter (DM) and the generation of scalar induced secondary gravitational waves by using the enhancement mechanism with a peak function in the non-canonical kinetic term in natural inflation is discussed. We show explicitly that the power spectrum for the primordial cur... |
2112.06856 | Karan Jani | Patrick Hu, Karan Jani, Kelly Holley-Bockelmann and Gregorio Carullo | Thermodynamics to infer the astrophysics of binary black hole mergers | 7 pages, 5 figures | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We introduce the Merger Entropy Index ($\mathcal{I}_\mathrm{BBH}$), a new
parameter to measure the efficiency of entropy transfer for any generic binary
black hole merger in General Relativity. We find that
$\mathcal{I}_\mathrm{BBH}$ is bounded between an asymptotic maximum and
minimum. For the observed population of... | [
{
"created": "Mon, 13 Dec 2021 18:12:19 GMT",
"version": "v1"
}
] | 2021-12-14 | [
[
"Hu",
"Patrick",
""
],
[
"Jani",
"Karan",
""
],
[
"Holley-Bockelmann",
"Kelly",
""
],
[
"Carullo",
"Gregorio",
""
]
] | We introduce the Merger Entropy Index ($\mathcal{I}_\mathrm{BBH}$), a new parameter to measure the efficiency of entropy transfer for any generic binary black hole merger in General Relativity. We find that $\mathcal{I}_\mathrm{BBH}$ is bounded between an asymptotic maximum and minimum. For the observed population of m... |
1606.03075 | Marc Casals | Marc Casals and Brien Nolan | Global Hadamard form for the Green Function in Schwarzschild space-time | 39 pages, 3 figures. In this version we have tidied up the paper
throughout and added the new part on relating the Green functions in
Schwarzschild and Pleba{\'n}ski-Hacyan spacetimes | Physical Review D 108, 044033, 2023 | 10.1103/PhysRevD.108.044033 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The retarded Green function of a wave equation on a 4-dimensional curved
background spacetime is a (generalized) function of two spacetime points and
diverges when these are connected by a null geodesic. The Hadamard form makes
explicit the form of this divergence but only when one of the points is in a
normal neighb... | [
{
"created": "Thu, 9 Jun 2016 19:30:25 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2016 20:13:46 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Feb 2020 20:49:02 GMT",
"version": "v3"
},
{
"created": "Wed, 16 Aug 2023 15:48:30 GMT",
"version": "v4"
}
] | 2023-08-17 | [
[
"Casals",
"Marc",
""
],
[
"Nolan",
"Brien",
""
]
] | The retarded Green function of a wave equation on a 4-dimensional curved background spacetime is a (generalized) function of two spacetime points and diverges when these are connected by a null geodesic. The Hadamard form makes explicit the form of this divergence but only when one of the points is in a normal neighbou... |
1410.6785 | Douglas A. Singleton | Sujoy K. Modak and Douglas Singleton | Baryogenesis via Hawking-like Radiation in the FRW Space-time | 17 pages, 0 figures, added references, discussion/comparison of
PLANCK and BICEP2 results, added discussion of generation of anisotropies.
Published versions (EPJC) | Eur.Phys.J. C75 (2015) 5, 200 | 10.1140/epjc/s10052-015-3431-8 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a phenomenological model for baryogenesis based on particle
creation in the Friedman-Robertson-Walker (FRW) spacetime. This study is a
continuation of our proposal that Hawking-like radiation in FRW space-time
explains several physical aspects of the early Universe including inflation. In
this model we stu... | [
{
"created": "Wed, 15 Oct 2014 20:08:32 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2015 17:13:45 GMT",
"version": "v2"
}
] | 2015-05-11 | [
[
"Modak",
"Sujoy K.",
""
],
[
"Singleton",
"Douglas",
""
]
] | We present a phenomenological model for baryogenesis based on particle creation in the Friedman-Robertson-Walker (FRW) spacetime. This study is a continuation of our proposal that Hawking-like radiation in FRW space-time explains several physical aspects of the early Universe including inflation. In this model we study... |
1609.03189 | Eduardo Guendelman I | David Benisty and E.I. Guendelman | Radiation Like Scalar Field and Gauge Fields in Cosmology for a theory
with Dynamical Time | 7 pages, to appear in Mod. Phys. Lett. A | null | 10.1142/S0217732316501881 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological solutions with a scalar field behaving as radiation are
obtained, in the context of gravitational theory with dynamical time. The
solution requires the spacial curvature of the universe k, to be zero, unlike
the standard radiation solutions, which do not impose any constraint on the
spacial curvature of ... | [
{
"created": "Sun, 11 Sep 2016 18:33:21 GMT",
"version": "v1"
}
] | 2016-10-19 | [
[
"Benisty",
"David",
""
],
[
"Guendelman",
"E. I.",
""
]
] | Cosmological solutions with a scalar field behaving as radiation are obtained, in the context of gravitational theory with dynamical time. The solution requires the spacial curvature of the universe k, to be zero, unlike the standard radiation solutions, which do not impose any constraint on the spacial curvature of th... |
gr-qc/0205096 | Demetrios Papadopoulos | D.B. Papadopoulos | Plasma waves driven by gravitational waves in an expanding universe | 14 pages | Class.Quant.Grav.19:1-12,2002 | 10.1088/0264-9381/19/11/312 | null | gr-qc | null | In a Friedmann-Robertson-Walker (FRW) cosmological model with zero spatial
curvature, we consider the interaction of the gravitational waves with the
plasma in the presence of a weak magnetic field. Using the relativistic
hydromagnetic equations it is verified that large amplitude magnetosonic waves
are excited, assu... | [
{
"created": "Wed, 22 May 2002 07:55:19 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Papadopoulos",
"D. B.",
""
]
] | In a Friedmann-Robertson-Walker (FRW) cosmological model with zero spatial curvature, we consider the interaction of the gravitational waves with the plasma in the presence of a weak magnetic field. Using the relativistic hydromagnetic equations it is verified that large amplitude magnetosonic waves are excited, assumi... |
2110.10610 | Pankaj Sheoran | Sanjar Shaymatov, Pankaj Sheoran and Sanjay Siwach | Motion of charged and spinning particle influenced by dark matter field
surrounding a charged dyonic black hole | 24 pages, 12 captioned figures, 2 tables and 2 appendices, (A new
figure added, text modified, to match with the published version in PRD) | Phys. Rev. D 105, 104059 (2022) | 10.1103/PhysRevD.105.104059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the motion of massive charged and spinning test particles
around a charged dyonic black hole spacetime surrounded by perfect fluid scalar
dark matter field. We obtain the equations of motion and find the expressions
for the four-velocity for the case of a charged particle, and four-momentum
components ... | [
{
"created": "Wed, 20 Oct 2021 15:11:21 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2022 12:37:09 GMT",
"version": "v2"
}
] | 2022-06-07 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Sheoran",
"Pankaj",
""
],
[
"Siwach",
"Sanjay",
""
]
] | We investigate the motion of massive charged and spinning test particles around a charged dyonic black hole spacetime surrounded by perfect fluid scalar dark matter field. We obtain the equations of motion and find the expressions for the four-velocity for the case of a charged particle, and four-momentum components fo... |
2304.02092 | Arvin Ravanpak | Arvin Ravanpak and Golnaz Farpour Fadakar | Logamediate inflation in DGP cosmology driven by a non-canonical scalar
field | null | Gravitation and Cosmology, Vol.29, No.1, pp 88-94, 2023 | 10.1134/S0202289323010085 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The main properties of the logamediate inflation driven by a non-canonical
scalar field in the framework of DGP braneworld gravity are investigated.
Considering high energy conditions we calculate the slow-roll parameters,
analytically. Then, we deal with the perturbation theory and calculate the most
important respe... | [
{
"created": "Tue, 4 Apr 2023 19:40:28 GMT",
"version": "v1"
}
] | 2023-04-06 | [
[
"Ravanpak",
"Arvin",
""
],
[
"Fadakar",
"Golnaz Farpour",
""
]
] | The main properties of the logamediate inflation driven by a non-canonical scalar field in the framework of DGP braneworld gravity are investigated. Considering high energy conditions we calculate the slow-roll parameters, analytically. Then, we deal with the perturbation theory and calculate the most important respect... |
1610.09960 | Rui Xu | Rui Xu | Looking for Lorentz Violation in Short-Range Gravity | 3 pages, Presented at the Seventh Meeting on CPT and Lorentz
Symmetry, Bloomington, Indiana, June 20-24, 2016 | null | null | IUHET 619 | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General violations of Lorentz symmetry can be described by the Standard-Model
Extension (SME) framework. The SME predicts modifications to existing physics
and can be tested in high-precision experiments. By looking for small
deviations from Newton gravity, short-range gravity experiments are expected to
be sensitive... | [
{
"created": "Fri, 28 Oct 2016 19:41:14 GMT",
"version": "v1"
}
] | 2016-11-01 | [
[
"Xu",
"Rui",
""
]
] | General violations of Lorentz symmetry can be described by the Standard-Model Extension (SME) framework. The SME predicts modifications to existing physics and can be tested in high-precision experiments. By looking for small deviations from Newton gravity, short-range gravity experiments are expected to be sensitive t... |
1305.3363 | Meng-Sen Ma | Meng-Sen Ma, Hui-Hua Zhao | Quantized space-time and its influences on some physical problems | 5pages, 1 figure | Chinese Physics C , 2014 38 (4): 045102 | 10.1088/1674-1137/38/4/045102 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the idea of quantized space-time of Snyder, we derive new
generalized uncertainty principle and new modified density of states.
Accordingly we discuss the influences of the modified density of states on some
physical quantities and laws. In addition we analyzed the exact solution of the
harmonic oscillator i... | [
{
"created": "Wed, 15 May 2013 06:20:20 GMT",
"version": "v1"
}
] | 2014-07-01 | [
[
"Ma",
"Meng-Sen",
""
],
[
"Zhao",
"Hui-Hua",
""
]
] | Based on the idea of quantized space-time of Snyder, we derive new generalized uncertainty principle and new modified density of states. Accordingly we discuss the influences of the modified density of states on some physical quantities and laws. In addition we analyzed the exact solution of the harmonic oscillator in ... |
1012.3165 | Alexandre Yale | Alexandre Yale | Exact Hawking Radiation of Scalars, Fermions, and Bosons Using the
Tunneling Method Without Back-Reaction | 8 pages, no figures. v3: Introduction updated. Version to appear in
PLB | Phys.Lett.B697:398-403,2011 | 10.1016/j.physletb.2011.02.023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation is studied for arbitrary scalars, fermions, and spin-1
bosons, using a tunneling approach, to every order in $\hbar$ but ignoring
back-reaction effects. It is shown that the additional quantum terms yield no
new contribution to the Hawking temperature. Indeed, it is found that the limit
of small $\h... | [
{
"created": "Tue, 14 Dec 2010 21:00:01 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Dec 2010 20:14:26 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Feb 2011 16:09:25 GMT",
"version": "v3"
}
] | 2011-05-19 | [
[
"Yale",
"Alexandre",
""
]
] | Hawking radiation is studied for arbitrary scalars, fermions, and spin-1 bosons, using a tunneling approach, to every order in $\hbar$ but ignoring back-reaction effects. It is shown that the additional quantum terms yield no new contribution to the Hawking temperature. Indeed, it is found that the limit of small $\hba... |
gr-qc/9701025 | Claude Barrabes | C. Barrabes, G.F. Bressange and P.A. Hogan | Some Physical Consequences of Abrupt Changes in the Multipole Moments of
a Gravitating Body | 26 pages, tex, no figures, to appear in Phys.Rev.D | Phys.Rev.D55:3477-3484,1997 | 10.1103/PhysRevD.55.3477 | null | gr-qc | null | The Barrab\`es-Israel theory of light-like shells in General Relativity is
used to show explicitly that in general a light-like shell is accompanied by an
impulsive gravitational wave. The gravitational wave is identified by its
Petrov Type N contribution to a Dirac delta-function term in the Weyl conformal
curvature... | [
{
"created": "Mon, 13 Jan 1997 15:11:21 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Barrabes",
"C.",
""
],
[
"Bressange",
"G. F.",
""
],
[
"Hogan",
"P. A.",
""
]
] | The Barrab\`es-Israel theory of light-like shells in General Relativity is used to show explicitly that in general a light-like shell is accompanied by an impulsive gravitational wave. The gravitational wave is identified by its Petrov Type N contribution to a Dirac delta-function term in the Weyl conformal curvature t... |
1610.08744 | Luca Buoninfante | L. Buoninfante | Ghost and singularity free theories of gravity | Master's thesis. Review. 139 pages. Supervisors: G. Lambiase and A.
Mazumdar. References added, changes to text | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Albert Einstein's General Relativity (GR) from 1916 has become the widely
accepted theory of gravity and been tested observationally to a very high
precision at different scales of energy and distance. At the same time, there
still remain important questions to resolve. At the classical level
cosmological and black h... | [
{
"created": "Thu, 27 Oct 2016 12:22:42 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Oct 2016 16:58:55 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Nov 2016 16:21:39 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Dec 2016 14:21:41 GMT",
"version": "v4"
}
] | 2016-12-09 | [
[
"Buoninfante",
"L.",
""
]
] | Albert Einstein's General Relativity (GR) from 1916 has become the widely accepted theory of gravity and been tested observationally to a very high precision at different scales of energy and distance. At the same time, there still remain important questions to resolve. At the classical level cosmological and black hol... |
1811.08503 | Carlos A. S. Almeida | D. A. Gomes, R. V. Maluf, C. A. S. Almeida | Thermodynamics of Schwarzschild-like black holes in modified gravity
models | Title changed, section VI suppressed. Other slight modifications in
order to match the accepted version to appears in Annals of Physics. 17
pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Over the last decades, many methods were developed to prove Hawking
radiation. Recently, a semiclassical method known as the tunneling method has
been proposed as a more straightforward way of derivating black hole
thermodynamical properties. This method has been widely applied to a vast sort
of spacetimes with satis... | [
{
"created": "Tue, 20 Nov 2018 21:58:30 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Apr 2020 23:49:56 GMT",
"version": "v2"
}
] | 2020-04-28 | [
[
"Gomes",
"D. A.",
""
],
[
"Maluf",
"R. V.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | Over the last decades, many methods were developed to prove Hawking radiation. Recently, a semiclassical method known as the tunneling method has been proposed as a more straightforward way of derivating black hole thermodynamical properties. This method has been widely applied to a vast sort of spacetimes with satisfa... |
2106.03203 | Sarbari Guha Dr. | Sucheta Datta and Sarbari Guha | Propagation of Axial and Polar Gravitational Waves in Kantowski-Sachs
Universe | 26 pages, 3 figures, accepted for publication in Physics of the Dark
Universe | Physics of the Dark Universe 34 (2021) 100890 | 10.1016/j.dark.2021.100890 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We apply the Regge-Wheeler formalism to study axial and polar gravitational
waves in Kantowski-Sachs universe. The background field equations and the
linearised perturbation equations for the modes are derived in presence of
matter. To find analytical solutions, we analyze the propagation of waves in
vacuum spacetime... | [
{
"created": "Sun, 6 Jun 2021 18:25:56 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Sep 2021 18:31:42 GMT",
"version": "v2"
}
] | 2021-10-15 | [
[
"Datta",
"Sucheta",
""
],
[
"Guha",
"Sarbari",
""
]
] | We apply the Regge-Wheeler formalism to study axial and polar gravitational waves in Kantowski-Sachs universe. The background field equations and the linearised perturbation equations for the modes are derived in presence of matter. To find analytical solutions, we analyze the propagation of waves in vacuum spacetime. ... |
gr-qc/0507093 | E. Paul J. Haas de | E.P.J. de Haas | The combination of de Broglie's Harmony of the Phases and Mie's theory
of gravity results in a Principle of Equivalence for Quantum Gravity | 8 pages, 2 figures | Annales Fond.Broglie 29 (2004) 707-726 | null | null | gr-qc | null | Under a Lorentz-transformation, Mie's 1912 gravitational mass behaves
identical as de Broglie's 1923 clock-like frequency. The same goes for Mie's
inertial mass and de Broglie's wave-like frequency. This allows the
interpretation of de Broglie's "Harmony of the Phases" as a "Principle of
Equivalence" for Quantum Grav... | [
{
"created": "Thu, 21 Jul 2005 16:35:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Haas",
"E. P. J.",
""
]
] | Under a Lorentz-transformation, Mie's 1912 gravitational mass behaves identical as de Broglie's 1923 clock-like frequency. The same goes for Mie's inertial mass and de Broglie's wave-like frequency. This allows the interpretation of de Broglie's "Harmony of the Phases" as a "Principle of Equivalence" for Quantum Gravit... |
2406.16636 | Jorge Valencia | Jorge Valencia, Rodrigo Tenorio, Maria Rossell\'o-Sastre, Sascha Husa | Mind the step: On the frequency-domain analysis of gravitational-wave
memory waveforms | 13 pages, 13 figures | null | null | LIGO-P2400263 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational-wave memory is characterized by a signal component that
persists after a transient signal has decayed. Treating such signals in the
frequency domain is non-trivial, since discrete Fourier transforms assume
periodic signals on finite time intervals. In order to reduce artifacts in the
Fourier transform, ... | [
{
"created": "Mon, 24 Jun 2024 13:42:11 GMT",
"version": "v1"
}
] | 2024-06-25 | [
[
"Valencia",
"Jorge",
""
],
[
"Tenorio",
"Rodrigo",
""
],
[
"Rosselló-Sastre",
"Maria",
""
],
[
"Husa",
"Sascha",
""
]
] | Gravitational-wave memory is characterized by a signal component that persists after a transient signal has decayed. Treating such signals in the frequency domain is non-trivial, since discrete Fourier transforms assume periodic signals on finite time intervals. In order to reduce artifacts in the Fourier transform, it... |
0705.2880 | Sam Dolan Dr | Sam R. Dolan | Instability of the massive Klein-Gordon field on the Kerr spacetime | Added references. 27 pages, 7 figures | Phys.Rev.D76:084001,2007 | 10.1103/PhysRevD.76.084001 | null | gr-qc hep-th | null | We investigate the instability of the massive scalar field in the vicinity of
a rotating black hole. The instability arises from amplification caused by the
classical superradiance effect. The instability affects bound states: solutions
to the massive Klein-Gordon equation which tend to zero at infinity. We
calculate... | [
{
"created": "Sun, 20 May 2007 17:56:25 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2007 09:26:12 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Dolan",
"Sam R.",
""
]
] | We investigate the instability of the massive scalar field in the vicinity of a rotating black hole. The instability arises from amplification caused by the classical superradiance effect. The instability affects bound states: solutions to the massive Klein-Gordon equation which tend to zero at infinity. We calculate t... |
1108.3793 | Benjamin K Tippett | Benjamin K. Tippett | Gravitational Lensing as a Mechanism For Effective Cloaking | 5 pages, 6 figures | null | 10.1103/PhysRevD.84.104034 | null | gr-qc physics.optics physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In light of the surge in popularity of electromagnetic cloaking devices, we
consider whether it is possible to use gravitational lensing to cloak a volume
of spacetime. A metric for such a spacetime geometry is presented, and its
geometric and physical implications are explained.
| [
{
"created": "Thu, 18 Aug 2011 16:54:09 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Sep 2011 16:38:59 GMT",
"version": "v2"
}
] | 2012-10-30 | [
[
"Tippett",
"Benjamin K.",
""
]
] | In light of the surge in popularity of electromagnetic cloaking devices, we consider whether it is possible to use gravitational lensing to cloak a volume of spacetime. A metric for such a spacetime geometry is presented, and its geometric and physical implications are explained. |
0712.0645 | Bin Wang | Xiaoping Rao, Bin Wang, Guohong Yang | Quasinormal modes and phase Transition of black holes | 6 pages | Phys.Lett.B649:472-477,2007 | 10.1016/j.physletb.2007.04.049 | null | gr-qc | null | We have studied the scalar field as well as the fermonic field perturbations
in the background of the massless BTZ black holes. Comparing with the
perturbation results in the generic nonrotating BTZ black hole background, we
found that the massless BTZ hole contains only normal modes in the
perturbations. We argued t... | [
{
"created": "Wed, 5 Dec 2007 03:20:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Rao",
"Xiaoping",
""
],
[
"Wang",
"Bin",
""
],
[
"Yang",
"Guohong",
""
]
] | We have studied the scalar field as well as the fermonic field perturbations in the background of the massless BTZ black holes. Comparing with the perturbation results in the generic nonrotating BTZ black hole background, we found that the massless BTZ hole contains only normal modes in the perturbations. We argued tha... |
1210.2046 | Oleg Zaslavskii | O. B. Zaslavskii | Acceleration of particles by quasiblack holes | 8 pages. Final version | Int. Journ. Mod. Phys. D. 22 6 (2013) 1350028 | 10.1142/S0218271813500284 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If two particles collide near the black hole horizon, the energy in the
centre of mass (CM) frame can grow indefinitely (the so-called the BSW effect).
This requires fine-tuning the parameters (the energy, angular momentum or
electric charge) of one particle. We show that the CM energy can be unbound
also for collisi... | [
{
"created": "Sun, 7 Oct 2012 12:01:30 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Mar 2013 19:33:18 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Apr 2013 23:20:32 GMT",
"version": "v3"
}
] | 2015-06-11 | [
[
"Zaslavskii",
"O. B.",
""
]
] | If two particles collide near the black hole horizon, the energy in the centre of mass (CM) frame can grow indefinitely (the so-called the BSW effect). This requires fine-tuning the parameters (the energy, angular momentum or electric charge) of one particle. We show that the CM energy can be unbound also for collision... |
0801.1823 | Manuel Tiglio | Oleg Korobkin, Burak Aksoylu, Michael Holst, Enrique Pazos, Manuel
Tiglio | Solving the Einstein constraint equations on multi-block triangulations
using finite element methods | Changes made to match the version to appear in Classical and Quantum
Gravity | Class. Quantum Grav. 26, 145007 (2009) | 10.1088/0264-9381/26/14/145007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to generate initial data for nonlinear relativistic simulations, one
needs to solve the Einstein constraints, which can be cast into a coupled set
of nonlinear elliptic equations. Here we present an approach for solving these
equations on three-dimensional multi-block domains using finite element
methods. We... | [
{
"created": "Fri, 11 Jan 2008 19:20:08 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jan 2008 21:33:19 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Jun 2009 07:05:21 GMT",
"version": "v3"
}
] | 2015-05-13 | [
[
"Korobkin",
"Oleg",
""
],
[
"Aksoylu",
"Burak",
""
],
[
"Holst",
"Michael",
""
],
[
"Pazos",
"Enrique",
""
],
[
"Tiglio",
"Manuel",
""
]
] | In order to generate initial data for nonlinear relativistic simulations, one needs to solve the Einstein constraints, which can be cast into a coupled set of nonlinear elliptic equations. Here we present an approach for solving these equations on three-dimensional multi-block domains using finite element methods. We i... |
1506.05336 | Minas Tsoukalas | Gaston Giribet and Minas Tsoukalas | Warped-AdS3 black holes with scalar halo | v2, 7 pages, minor corrections, version accepted to PRD | Phys. Rev. D 92, 064027 (2015) | 10.1103/PhysRevD.92.064027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a stretched (aka Warped) Anti-de Sitter black hole in 3
dimensions supported by a real scalar field configuration. The latter is
regular everywhere outside and on the horizon. No hair theorems in 3 dimensions
demand the matter to be coupled to the curvature in a non-minimal way; however,
this coupling ca... | [
{
"created": "Wed, 17 Jun 2015 13:49:36 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 2015 12:41:38 GMT",
"version": "v2"
}
] | 2015-09-25 | [
[
"Giribet",
"Gaston",
""
],
[
"Tsoukalas",
"Minas",
""
]
] | We construct a stretched (aka Warped) Anti-de Sitter black hole in 3 dimensions supported by a real scalar field configuration. The latter is regular everywhere outside and on the horizon. No hair theorems in 3 dimensions demand the matter to be coupled to the curvature in a non-minimal way; however, this coupling can ... |
1601.04506 | Helmut Friedrich | Helmut Friedrich | Sharp asymptotics for Einstein-$\lambda$-dust flows | 44 pages | null | 10.1007/s00220-016-2716-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Einstein-dust equations with positive cosmological constant
$\lambda$ on manifolds with time slices diffeomorphic to an orientable, compact
3-manifold $S$. It is shown that the set of standard Cauchy data for the
Einstein-$\lambda$-dust equations on $S$ contains an open (in terms of suitable
Sobolev n... | [
{
"created": "Mon, 18 Jan 2016 13:33:48 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Friedrich",
"Helmut",
""
]
] | We consider the Einstein-dust equations with positive cosmological constant $\lambda$ on manifolds with time slices diffeomorphic to an orientable, compact 3-manifold $S$. It is shown that the set of standard Cauchy data for the Einstein-$\lambda$-dust equations on $S$ contains an open (in terms of suitable Sobolev nor... |
0901.0993 | Doreen M\"uller | Benny Walther, Bernd Bruegmann, Doreen Mueller | Numerical black hole initial data with low eccentricity based on
post-Newtonian orbital parameters | 20 pages, 11 figures, pdflatex; V2 with minor changes according to
published version | Phys.Rev.D79:124040,2009 | 10.1103/PhysRevD.79.124040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole binaries on non-eccentric orbits form an important subclass of
gravitational wave sources, but it is a non-trivial issue to construct
numerical initial data with minimal initial eccentricity for numerical
simulations. We compute post-Newtonian orbital parameters for quasi-spherical
orbits using the method ... | [
{
"created": "Thu, 8 Jan 2009 09:15:52 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2009 15:35:48 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Mar 2010 15:37:56 GMT",
"version": "v3"
}
] | 2010-03-29 | [
[
"Walther",
"Benny",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Mueller",
"Doreen",
""
]
] | Black hole binaries on non-eccentric orbits form an important subclass of gravitational wave sources, but it is a non-trivial issue to construct numerical initial data with minimal initial eccentricity for numerical simulations. We compute post-Newtonian orbital parameters for quasi-spherical orbits using the method of... |
0712.2260 | Marcelo Salgado | Marcelo Salgado and David Martinez-del Rio | The initial value problem of scalar-tensor theories of gravity | 12 pages; RevTex; Published in the Proceedings of the VII Mexican
School on Gravitation and Mathematical Physics | J.Phys.Conf.Ser.91:012004,2007 | 10.1088/1742-6596/91/1/012004 | null | gr-qc | null | The initial value problem of scalar-tensor theories of gravity (STT) is
analyzed in the physical (Jordan) frame using a 3+1 decomposition of spacetime.
A first order strongly hyperbolic system is obtained for which the well
posedness of the Cauchy problem can be established. We provide two simple
applications of the ... | [
{
"created": "Thu, 13 Dec 2007 23:33:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Salgado",
"Marcelo",
""
],
[
"Rio",
"David Martinez-del",
""
]
] | The initial value problem of scalar-tensor theories of gravity (STT) is analyzed in the physical (Jordan) frame using a 3+1 decomposition of spacetime. A first order strongly hyperbolic system is obtained for which the well posedness of the Cauchy problem can be established. We provide two simple applications of the 3+... |
1701.00259 | Andrei Galiautdinov | Andrei Galiautdinov (University of Georgia) and Lewis H. Ryder
(University of Kent, Canterbury) | Neutron interference in the Earth's gravitational field | 7 pages, 1 figure | null | 10.1007/s10714-017-2241-8 | null | gr-qc physics.pop-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work relates to the famous experiments, performed in 1975 and 1979 by
Werner et al., measuring neutron interference and neutron Sagnac effects in the
earth's gravitational field. Employing the method of Stodolsky in its weak
field approximation, explicit expressions are derived for the two phase shifts,
which tu... | [
{
"created": "Sun, 1 Jan 2017 16:22:05 GMT",
"version": "v1"
}
] | 2017-06-28 | [
[
"Galiautdinov",
"Andrei",
"",
"University of Georgia"
],
[
"Ryder",
"Lewis H.",
"",
"University of Kent, Canterbury"
]
] | This work relates to the famous experiments, performed in 1975 and 1979 by Werner et al., measuring neutron interference and neutron Sagnac effects in the earth's gravitational field. Employing the method of Stodolsky in its weak field approximation, explicit expressions are derived for the two phase shifts, which turn... |
2403.09489 | Wynn C. G. Ho | Oliver H. Wilson (Haverford), Wynn C.G. Ho (Haverford) | Gravitational waves from glitch-induced f-mode oscillations in quark and
neutron stars | 12 pages, 16 figures; accepted for publication in Physical Review D | Phys. Rev. D 109, 083006 (2024) | 10.1103/PhysRevD.109.083006 | null | gr-qc astro-ph.SR nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Matter in compact stars is dense enough that transient events within the star
could have sufficiently high energies to produce detectable gravitational waves
(GWs). These GWs could be used to constrain the equation of state (EoS) for
matter in the star and could reveal that there is more than one type of EoS at
play ... | [
{
"created": "Thu, 14 Mar 2024 15:30:19 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Wilson",
"Oliver H.",
"",
"Haverford"
],
[
"Ho",
"Wynn C. G.",
"",
"Haverford"
]
] | Matter in compact stars is dense enough that transient events within the star could have sufficiently high energies to produce detectable gravitational waves (GWs). These GWs could be used to constrain the equation of state (EoS) for matter in the star and could reveal that there is more than one type of EoS at play in... |
1202.1846 | Alejandro Corichi | Alejandro Corichi and Tatjana Vukasinac | Effective constrained polymeric theories and their continuum limit | 20 pages, 5 figures. Typos corrected, discussion expanded, references
added. Version to be published in PRD | Phys.Rev. D86 (2012) 064019 | 10.1103/PhysRevD.86.064019 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The classical limit of polymer quantum theories yields a one parameter family
of `effective' theories labeled by \lambda. Here we consider such families for
constrained theories and pose the problem of taking the `continuum limit',
\lambda -> 0. We put forward criteria for such question to be well posed, and
propose ... | [
{
"created": "Wed, 8 Feb 2012 22:06:56 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Aug 2012 20:59:18 GMT",
"version": "v2"
}
] | 2020-06-18 | [
[
"Corichi",
"Alejandro",
""
],
[
"Vukasinac",
"Tatjana",
""
]
] | The classical limit of polymer quantum theories yields a one parameter family of `effective' theories labeled by \lambda. Here we consider such families for constrained theories and pose the problem of taking the `continuum limit', \lambda -> 0. We put forward criteria for such question to be well posed, and propose a ... |
2312.17662 | Gerard Clement | G\'erard Cl\'ement and Khireddine Nouicer | Cotton gravity is not predictive | 11 pages, revised augmented version, incorporates input from
arXiv:2401.16008 | Phys. Lett. B 856 (2024) 138947 | null | LAPTH-065/23 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | It is well-known that the theory of Cotton gravity proposed by Harada is
trivially solved by all isotropic and homogeneous cosmologies. We show that
this under-determination is more general. More precisely, the degree of
arbitrariness in the solutions increases with the degree of symmetry. We give
two simple examples... | [
{
"created": "Fri, 29 Dec 2023 16:03:08 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jan 2024 10:59:31 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Aug 2024 08:40:51 GMT",
"version": "v3"
}
] | 2024-08-14 | [
[
"Clément",
"Gérard",
""
],
[
"Nouicer",
"Khireddine",
""
]
] | It is well-known that the theory of Cotton gravity proposed by Harada is trivially solved by all isotropic and homogeneous cosmologies. We show that this under-determination is more general. More precisely, the degree of arbitrariness in the solutions increases with the degree of symmetry. We give two simple examples. ... |
gr-qc/9708020 | Alicia Sintes Olives | A.M. Sintes, A.A. Coley, J. Carot | Lie groups of conformal motions acting on null orbits | 5 pages, Latex | Gen.Rel.Grav. 30 (1998) 151-157 | 10.1023/A:1018885203138 | null | gr-qc | null | Space-times admitting a 3-dimensional Lie group of conformal motions $C_3$
acting on null orbits are studied. Coordinate expressions for the metric and
the conformal Killing vectors (CKV) are provided (irrespectively of the matter
content) and then all possible perfect fluid solutions are found, although none
of thes... | [
{
"created": "Mon, 11 Aug 1997 09:44:14 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Sintes",
"A. M.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Carot",
"J.",
""
]
] | Space-times admitting a 3-dimensional Lie group of conformal motions $C_3$ acting on null orbits are studied. Coordinate expressions for the metric and the conformal Killing vectors (CKV) are provided (irrespectively of the matter content) and then all possible perfect fluid solutions are found, although none of these ... |
1204.1691 | Celia Escamilla-Rivera | Celia Escamilla-Rivera, Maximo Banados and Pedro G. Ferreira | A tensor instability in the Eddington inspired Born-Infeld Theory of
Gravity | 5 pages, approved by Phys. Rev. D, additional references and minor
modifications | Phys. Rev. D 85, 087302 (2012) | 10.1103/PhysRevD.85.087302 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider an extension to Eddington's proposal for the
gravitational action. We study tensor perturbations of a homogeneous and
isotropic space-time in the Eddington regime, where modifications to Einstein
gravity are strong. We find that the tensor mode is linearly unstable deep in
the Eddington regi... | [
{
"created": "Sat, 7 Apr 2012 23:19:59 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Apr 2012 14:50:30 GMT",
"version": "v2"
}
] | 2012-05-08 | [
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Banados",
"Maximo",
""
],
[
"Ferreira",
"Pedro G.",
""
]
] | In this paper we consider an extension to Eddington's proposal for the gravitational action. We study tensor perturbations of a homogeneous and isotropic space-time in the Eddington regime, where modifications to Einstein gravity are strong. We find that the tensor mode is linearly unstable deep in the Eddington regime... |
0812.5081 | Sergei Maydanyuk | Sergei P. Maydanyuk | A fully quantum method of determination of penetrability and reflection
coefficients in quantum FRW model with radiation | 28 pages, 7 figures (20 files in eps format), 4 tables | Int.J.Mod.Phys.D19:395-435,2010 | 10.1142/S0218271810016464 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the paper the closed Friedmann--Robertson--Walker model with quantization
in the presence of the positive cosmological constant and radiation is studied.
For analysis of tunneling probability for birth of an asymptotically deSitter,
inflationary Universe as a function of the radiation energy a new definition of
a ... | [
{
"created": "Tue, 30 Dec 2008 15:16:22 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Jan 2010 10:22:52 GMT",
"version": "v2"
}
] | 2010-05-07 | [
[
"Maydanyuk",
"Sergei P.",
""
]
] | In the paper the closed Friedmann--Robertson--Walker model with quantization in the presence of the positive cosmological constant and radiation is studied. For analysis of tunneling probability for birth of an asymptotically deSitter, inflationary Universe as a function of the radiation energy a new definition of a "f... |
1505.00600 | Olivier Minazzoli | Olivier Minazzoli, Aur\'elien Hees | Basics of the pressuron | 4 pages, proceedings of the 50th Rencontres de Moriond, Gravitation
Session: "100 years after GR", 21-28 March 2015 | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pressuron is a specific case of a dilaton-like field that leads to a
decoupling of the scalar-field in the field equation for pressureless fluids.
Hence, the pressuron recovers general relativity in the limit of weak pressure.
Here we review its basics.
| [
{
"created": "Mon, 4 May 2015 11:54:08 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2015 15:42:53 GMT",
"version": "v2"
}
] | 2015-05-08 | [
[
"Minazzoli",
"Olivier",
""
],
[
"Hees",
"Aurélien",
""
]
] | The pressuron is a specific case of a dilaton-like field that leads to a decoupling of the scalar-field in the field equation for pressureless fluids. Hence, the pressuron recovers general relativity in the limit of weak pressure. Here we review its basics. |
gr-qc/9406023 | Chris. Fama | Christopher J. Fama and Susan M. Scott | Invariance properties of boundary sets of open embeddings of manifolds
and their application to the abstract boundary | about 30 pp. (LaTeX/AMS-LaTeX), 8 figures included, also available
via FTP or WWW - see paper. To appear in AMS Contemporary Math. volume 170
Bemm/Duggal, eds.; CMA preprint # MRR-036-94. (Revision corrects some TeX
problems, mainly occuring when using XY-Pic.) | null | null | null | gr-qc | null | The {\em abstract boundary\/} (or {\em {\em a\/}-boundary\/}) of Scott and
Szekeres \cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional,
paracompact, connected, Hausdorff, $C^\infty$-manifold (without a boundary in
the usual sense). In general relativity one deals with a {\em space-% time\/}
$(\cM,g)$ (a... | [
{
"created": "Thu, 16 Jun 1994 06:02:09 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jun 1994 00:09:50 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Jun 1994 02:11:06 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Fama",
"Christopher J.",
""
],
[
"Scott",
"Susan M.",
""
]
] | The {\em abstract boundary\/} (or {\em {\em a\/}-boundary\/}) of Scott and Szekeres \cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\infty$-manifold (without a boundary in the usual sense). In general relativity one deals with a {\em space-% time\/} $(\cM,g)$ (a 4... |
1509.09017 | Dao-Jun Liu | Yang Huang, Dao-Jun Liu | Charged scalar perturbations around a regular magnetic black hole | 7 pages, 4 figures, substantially revised, published in Phys. Rev. D | Physical Review D 93, 104011 (2016) | 10.1103/PhysRevD.93.104011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study charged scalar perturbations in the background of a regular magnetic
black hole. In this case, the charged scalar perturbation does not result in
superradiance. By using careful time-domain analysis, we show that the charge
of scalar field can change the real part of quasinormal frequency, but has
little imp... | [
{
"created": "Wed, 30 Sep 2015 05:24:23 GMT",
"version": "v1"
},
{
"created": "Wed, 4 May 2016 01:21:57 GMT",
"version": "v2"
}
] | 2016-05-05 | [
[
"Huang",
"Yang",
""
],
[
"Liu",
"Dao-Jun",
""
]
] | We study charged scalar perturbations in the background of a regular magnetic black hole. In this case, the charged scalar perturbation does not result in superradiance. By using careful time-domain analysis, we show that the charge of scalar field can change the real part of quasinormal frequency, but has little impac... |
1101.1654 | Yurii Ignatyev | A.A. Agathonov and Yu.G. Ignatyev | Exact solution of the relativistic magnetohydrodynamic equations in the
background of a plane gravitational wave with combined polarization | 5 pages, 8 references | Grav. Cosmol. Vol. 17, No.1, 2011 | 10.1134/S0202289311010038 | null | gr-qc astro-ph.HE math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an exact solution of the self-consistent relativistic
magnetohydrodynamic equations for an anisotropic magnetoactive plasma in the
background of a plane gravitational wave metric (PGW) with an arbitrary
polarization. It is shown that, in the linear approximation in the
gravitational wave amplitude, only the... | [
{
"created": "Sun, 9 Jan 2011 16:46:38 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Agathonov",
"A. A.",
""
],
[
"Ignatyev",
"Yu. G.",
""
]
] | We obtain an exact solution of the self-consistent relativistic magnetohydrodynamic equations for an anisotropic magnetoactive plasma in the background of a plane gravitational wave metric (PGW) with an arbitrary polarization. It is shown that, in the linear approximation in the gravitational wave amplitude, only the $... |
gr-qc/0606048 | Michael Fil'chenkov Dr | Irina Dymnikova, Michael Fil'chenkov | Gauge-noninvariance of quantum cosmology and vacuum dark energy | 5 pages, 1 figure | Phys.Lett.B635:181-185,2006 | 10.1016/j.physletb.2006.02.060 | null | gr-qc | null | We address the question how to adapt cosmological constant $\Lambda$ for
description of a vacuum dark energy density jumping from the big initial value
to the small today value suggested by observations. We find such a possibility
in the gauge-noninvariance of quantum cosmology which leads to a connection
between a c... | [
{
"created": "Mon, 12 Jun 2006 14:09:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Dymnikova",
"Irina",
""
],
[
"Fil'chenkov",
"Michael",
""
]
] | We address the question how to adapt cosmological constant $\Lambda$ for description of a vacuum dark energy density jumping from the big initial value to the small today value suggested by observations. We find such a possibility in the gauge-noninvariance of quantum cosmology which leads to a connection between a cho... |
2112.12149 | Christian Dioguardi | Christian Dioguardi, Antonio Racioppi, Eemeli Tomberg | Slow-roll inflation in Palatini $F(R)$ gravity | 20 pages, 5 figures, 1 table, matches the published version | JHEP 06 (2022) 106 | 10.1007/JHEP06(2022)106 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study single field slow-roll inflation in the presence of $F(R)$ gravity
in the Palatini formulation. In contrast to metric $F(R)$, when rewritten in
terms of an auxiliary field and moved to the Einstein frame, Palatini $F(R)$
does not develop a new dynamical degree of freedom. However, it is not possible
to solve... | [
{
"created": "Wed, 22 Dec 2021 18:59:37 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Jul 2022 12:09:33 GMT",
"version": "v2"
}
] | 2022-07-12 | [
[
"Dioguardi",
"Christian",
""
],
[
"Racioppi",
"Antonio",
""
],
[
"Tomberg",
"Eemeli",
""
]
] | We study single field slow-roll inflation in the presence of $F(R)$ gravity in the Palatini formulation. In contrast to metric $F(R)$, when rewritten in terms of an auxiliary field and moved to the Einstein frame, Palatini $F(R)$ does not develop a new dynamical degree of freedom. However, it is not possible to solve a... |
0810.0064 | Roman Sverdlov | Roman Sverdlov | Quantum mechanics and gravity as preclusion principles of four
dimensional geometries | I have incorporated third law of thermodynamics into the decoherence
arguments | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of this paper is to employ a "preclusion principle" originally
suggested by Rafael Sorkin in order to come up with a relativistically
covariant model of quantum mechanics and gravity. Space-time is viewed as
geometry as opposed to dynamics, and "unwanted" histories in that geometry are
precluded.
| [
{
"created": "Wed, 1 Oct 2008 02:33:05 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 2008 21:09:35 GMT",
"version": "v2"
},
{
"created": "Sun, 12 Oct 2008 01:20:50 GMT",
"version": "v3"
},
{
"created": "Thu, 16 Oct 2008 17:57:51 GMT",
"version": "v4"
}
] | 2008-10-16 | [
[
"Sverdlov",
"Roman",
""
]
] | The goal of this paper is to employ a "preclusion principle" originally suggested by Rafael Sorkin in order to come up with a relativistically covariant model of quantum mechanics and gravity. Space-time is viewed as geometry as opposed to dynamics, and "unwanted" histories in that geometry are precluded. |
1708.03675 | Abolhassan Mohammadi | Kh. Saaidi, A. Mohammadi, T. Golanbari | Light of Planck-2015 on Non-Canonical Inflation | 12 pages, 6 figures, 2 tables, Advances in High Energy Physics, 2015 | null | 10.1155/2015/926807 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Slow-roll inflationary scenario is considered in non-canonical scalar field
model supposing a power-law function for kinetic term, and using two
formalisms. In the first approach, the potential is considered as a power-law
function, that is the most common approach in studying inflation.
Hamilton-Jacobi approach is s... | [
{
"created": "Thu, 10 Aug 2017 04:37:17 GMT",
"version": "v1"
}
] | 2017-08-15 | [
[
"Saaidi",
"Kh.",
""
],
[
"Mohammadi",
"A.",
""
],
[
"Golanbari",
"T.",
""
]
] | Slow-roll inflationary scenario is considered in non-canonical scalar field model supposing a power-law function for kinetic term, and using two formalisms. In the first approach, the potential is considered as a power-law function, that is the most common approach in studying inflation. Hamilton-Jacobi approach is sel... |
gr-qc/9605011 | Domenico Giulini | Domenico Giulini | Consistently Implementing the Fields Self-Energy in Newtonian Gravity | Plain-TeX, 12 pages, no figures | Phys.Lett. A232 (1997) 165-170 | 10.1016/S0375-9601(97)00369-1 | THEP-96/7 | gr-qc | null | We consider in a pedagogical fashion alterations to Newtonian gravity due to
the postulate that all energy corresponds to active gravitational mass when
applied to the self-energy of the gravitational field. We show why a simple
addition of ${1\over c^2}$ times the gravitational field energy to the matter
density in ... | [
{
"created": "Mon, 6 May 1996 14:49:03 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Giulini",
"Domenico",
""
]
] | We consider in a pedagogical fashion alterations to Newtonian gravity due to the postulate that all energy corresponds to active gravitational mass when applied to the self-energy of the gravitational field. We show why a simple addition of ${1\over c^2}$ times the gravitational field energy to the matter density in Ne... |
gr-qc/0610053 | Giorgio Longhi | G.Longhi | Locality hypothesis and the speed of light | 23 pages | Found.Phys. 19 (2006) 201-223 | 10.1007/s10702-006-0513-8 | null | gr-qc | null | The locality hypothesis is generally considered necessary for the study of
the kinematics of non-inertial systems in special relativity. In this paper we
discuss this hypothesis, showing the necessity of an improvement, in order to
get a more clear understanding of the various concepts involved, like
coordinate veloc... | [
{
"created": "Wed, 11 Oct 2006 10:49:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Longhi",
"G.",
""
]
] | The locality hypothesis is generally considered necessary for the study of the kinematics of non-inertial systems in special relativity. In this paper we discuss this hypothesis, showing the necessity of an improvement, in order to get a more clear understanding of the various concepts involved, like coordinate velocit... |
0803.2228 | Neil Russell | Neil Russell | Lorentz Violation and Torsion | 5 pp, talk given at 4th Meeting on Lorentz and CPT Violation,
Bloomington, Indiana, USA, 8-11 August 2007 | null | 10.1142/9789812779519_0044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this proceedings, similarities between the structure of theories with
Lorentz violation and theories with constant torsion in flat spacetime are
exploited to place bounds on torsion components. An example is given showing
the analysis leading to bounds on the axial-vector and mixed-symmetry
components of torsion, ... | [
{
"created": "Fri, 14 Mar 2008 19:17:26 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Russell",
"Neil",
""
]
] | In this proceedings, similarities between the structure of theories with Lorentz violation and theories with constant torsion in flat spacetime are exploited to place bounds on torsion components. An example is given showing the analysis leading to bounds on the axial-vector and mixed-symmetry components of torsion, ba... |
2306.12350 | Giulia Ventagli | Giulia Ventagli, Paolo Pani, Thomas P. Sotiriou | Incompatibility of gravity theories with auxiliary fields with the
Standard Model | 12 pages, added references, corrected typos, revised argument in
section IV, results unchanged | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories of gravity with auxiliary fields are of particular interest since
they are able to circumvent Lovelock's theorem while avoiding to introduce new
degrees of freedom. This type of theories introduces derivatives of the
stress-energy tensor in the modified Einstein equation. This peculiar structure
of the field... | [
{
"created": "Wed, 21 Jun 2023 15:46:45 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2024 19:07:56 GMT",
"version": "v2"
}
] | 2024-01-17 | [
[
"Ventagli",
"Giulia",
""
],
[
"Pani",
"Paolo",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | Theories of gravity with auxiliary fields are of particular interest since they are able to circumvent Lovelock's theorem while avoiding to introduce new degrees of freedom. This type of theories introduces derivatives of the stress-energy tensor in the modified Einstein equation. This peculiar structure of the field e... |
gr-qc/9902057 | Tekin Dereli | T. Dereli (METU, Ankara), R. W. Tucker (Lancaster U.) | Self-gravitating line sources of weak hypercharge | 4 pages, REVTeX file, no figures | Class.Quant.Grav.16:L45-L49,1999 | 10.1088/0264-9381/16/8/101 | null | gr-qc | null | We explore the role of the Cremmer-Scherk mechanism in the context of low
energy effective string theory by coupling the antisymmetric 3-form gauge
potential to an Abelian gauge potential carrying weak hypercharge. The theory
admits a class of exact self-gravitating solutions in the spontaneously broken
phase in whic... | [
{
"created": "Fri, 19 Feb 1999 12:24:52 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Dereli",
"T.",
"",
"METU, Ankara"
],
[
"Tucker",
"R. W.",
"",
"Lancaster U."
]
] | We explore the role of the Cremmer-Scherk mechanism in the context of low energy effective string theory by coupling the antisymmetric 3-form gauge potential to an Abelian gauge potential carrying weak hypercharge. The theory admits a class of exact self-gravitating solutions in the spontaneously broken phase in which ... |
1612.06515 | Yun Soo Myung | Yun Soo Myung, Young-Jai Park | Preheating in the nonminimal derivative coupling to gravity | 15 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the reheating mechanism after the end of inflation in the
non-minimal derivative coupling (NDC) to gravity with quadratic potential. This
is because the inflaton of the NDC should describe the slow-roll inflation as
well as the preheating stage after the end of inflation. We point out that the
non-periodic... | [
{
"created": "Tue, 20 Dec 2016 06:07:45 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Myung",
"Yun Soo",
""
],
[
"Park",
"Young-Jai",
""
]
] | We revisit the reheating mechanism after the end of inflation in the non-minimal derivative coupling (NDC) to gravity with quadratic potential. This is because the inflaton of the NDC should describe the slow-roll inflation as well as the preheating stage after the end of inflation. We point out that the non-periodic i... |
2105.01702 | Banibrata Mukhopadhyay | Agrim Sharma and Banibrata Mukhopadhyay | Modified Newtonian Gravity: Explaining observations of sub- and
super-Chandrasekhar limiting mass white dwarfs | 9 pages including 4 figures; published in Scientific Voyage (ISSN:
2395-5546); http://scientificvoyage.net/index.php/sv/article/view/32/26 | Scientific Voyage 2 (No. 1) (2021) 20-28 | null | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of possible modification to gravity theory, whether it is in the
Newtonian or general relativistic premises, is there for quite sometime. Based
on it, astrophysical and cosmological problems are targeted to solve. But none
of the Newtonian theories of modification has been performed from the first
principle.... | [
{
"created": "Tue, 4 May 2021 18:52:34 GMT",
"version": "v1"
}
] | 2022-01-02 | [
[
"Sharma",
"Agrim",
""
],
[
"Mukhopadhyay",
"Banibrata",
""
]
] | The idea of possible modification to gravity theory, whether it is in the Newtonian or general relativistic premises, is there for quite sometime. Based on it, astrophysical and cosmological problems are targeted to solve. But none of the Newtonian theories of modification has been performed from the first principle. H... |
1710.10438 | Vyacheslav Dokuchaev | Victor Berezin, Vyacheslav Dokuchaev and Yury Eroshenko | On the theory of spherically symmetric thin shells in conformal gravity | 11 pages, ICPPA-2017 conference report | Intern. J. Mod. Phys. D 27, 1841012 (2018) | 10.1142/S0218271818410122 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spherically symmetric thin shells are the nearest generalizations of the
point-like particles. Moreover, they serve as the simple sources of the
gravitational fields both in General Relativity and much more complex quadratic
gravity theories. We are interested in the special and physically important
case when all... | [
{
"created": "Sat, 28 Oct 2017 09:57:43 GMT",
"version": "v1"
}
] | 2018-12-17 | [
[
"Berezin",
"Victor",
""
],
[
"Dokuchaev",
"Vyacheslav",
""
],
[
"Eroshenko",
"Yury",
""
]
] | The spherically symmetric thin shells are the nearest generalizations of the point-like particles. Moreover, they serve as the simple sources of the gravitational fields both in General Relativity and much more complex quadratic gravity theories. We are interested in the special and physically important case when all t... |
0710.1598 | Alan Coley | A. Coley | Classification of the Weyl Tensor in Higher Dimensions and Applications | Topical Review for Classical and Quantum Gravity. Final published
version | Class.Quant.Grav.25:033001,2008 | 10.1088/0264-9381/25/3/033001 | null | gr-qc hep-th | null | We review the theory of alignment in Lorentzian geometry and apply it to the
algebraic classification of the Weyl tensor in higher dimensions. This
classification reduces to the the well-known Petrov classification of the Weyl
tensor in four dimensions. We discuss the algebraic classification of a number
of known hig... | [
{
"created": "Mon, 8 Oct 2007 17:25:19 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jan 2008 18:11:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Coley",
"A.",
""
]
] | We review the theory of alignment in Lorentzian geometry and apply it to the algebraic classification of the Weyl tensor in higher dimensions. This classification reduces to the the well-known Petrov classification of the Weyl tensor in four dimensions. We discuss the algebraic classification of a number of known highe... |
1811.09625 | Debottam Nandi | Debottam Nandi | Stable contraction in Brans-Dicke cosmology | 22 pages and 5 tables, accepted in JCAP | JCAP05(2019)040 | 10.1088/1475-7516/2019/05/040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Contracting Universe (including bouncing models) solution generally depends
on the initial conditions and hence possesses an extreme fine-tuning problem.
In order to probe the stability of those solutions, in this work, we consider
the Brans-Dicke theory with the power law potential in the presence of an
additional b... | [
{
"created": "Fri, 23 Nov 2018 10:08:28 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2019 05:20:22 GMT",
"version": "v2"
}
] | 2019-05-27 | [
[
"Nandi",
"Debottam",
""
]
] | Contracting Universe (including bouncing models) solution generally depends on the initial conditions and hence possesses an extreme fine-tuning problem. In order to probe the stability of those solutions, in this work, we consider the Brans-Dicke theory with the power law potential in the presence of an additional bar... |
gr-qc/9609030 | Dr John W. Barrett | John W. Barrett, Louis Crane | An algebraic interpretation of the Wheeler-DeWitt equation | 10 pages, amstex, uses epsf.tex. New version has improved
presentation | Class.Quant.Grav. 14 (1997) 2113-2121 | 10.1088/0264-9381/14/8/011 | null | gr-qc | null | We make a direct connection between the construction of three dimensional
topological state sums from tensor categories and three dimensional quantum
gravity by noting that the discrete version of the Wheeler-DeWitt equation is
exactly the pentagon for the associator of the tensor category, the
Biedenharn-Elliott ide... | [
{
"created": "Thu, 12 Sep 1996 11:31:24 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Apr 1997 22:31:02 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Barrett",
"John W.",
""
],
[
"Crane",
"Louis",
""
]
] | We make a direct connection between the construction of three dimensional topological state sums from tensor categories and three dimensional quantum gravity by noting that the discrete version of the Wheeler-DeWitt equation is exactly the pentagon for the associator of the tensor category, the Biedenharn-Elliott ident... |
1206.3067 | Gherardo Piacitelli | Sergio Doplicher, Gherardo Piacitelli, Luca Tomassini, Stefano Viaggiu | Comment on "Can we measure structures to a precision better than the
Planck length?"[arXiv:1205.3636], by Sabine Hossenfelder | LaTeX, 6 pages. A discussion about the meaning of localisation added
to the previous version, together with two new references | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | First principles do imply a non-zero minimal distance between events in
spacetime, but no positive lower bound to the precision of the measurement of a
single coordinate.
| [
{
"created": "Thu, 14 Jun 2012 10:34:10 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Sep 2012 06:01:57 GMT",
"version": "v2"
}
] | 2012-09-21 | [
[
"Doplicher",
"Sergio",
""
],
[
"Piacitelli",
"Gherardo",
""
],
[
"Tomassini",
"Luca",
""
],
[
"Viaggiu",
"Stefano",
""
]
] | First principles do imply a non-zero minimal distance between events in spacetime, but no positive lower bound to the precision of the measurement of a single coordinate. |
1207.6350 | Kayll Lake | Philippe Landry, Majd Abdelqader and Kayll Lake | The McVittie solution with a negative cosmological constant | 6 pages twocolumn revtex 4-1 8 figures updated references Final form
to appear in Phys Rev D | Physical Review D 86, 084002 (2012) | 10.1103/PhysRevD.86.084002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Whereas current cosmological observations suggest that the universe is
dominated by a positive cosmological constant ($\Lambda > 0$), the AdS/CFT
correspondence tells us that the case $\Lambda<0$ is still worthy of
consideration. In this paper we study the McVittie solution with $\Lambda<0$.
Following a related study... | [
{
"created": "Thu, 26 Jul 2012 17:51:44 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jul 2012 18:16:27 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Sep 2012 19:45:43 GMT",
"version": "v3"
}
] | 2013-05-30 | [
[
"Landry",
"Philippe",
""
],
[
"Abdelqader",
"Majd",
""
],
[
"Lake",
"Kayll",
""
]
] | Whereas current cosmological observations suggest that the universe is dominated by a positive cosmological constant ($\Lambda > 0$), the AdS/CFT correspondence tells us that the case $\Lambda<0$ is still worthy of consideration. In this paper we study the McVittie solution with $\Lambda<0$. Following a related study, ... |
gr-qc/0506020 | Martin Einhorn | Martin B Einhorn and Manavendra Mahato | Beyond the Horizon | 9 pages, 1 figure | Phys.Rev. D73 (2006) 104035 | 10.1103/PhysRevD.73.104035 | MCTP-05-80 & NSF-KITP-05-30 | gr-qc hep-th | null | Cosmic horizons arise in general relativity in the context of black holes and
in certain cosmologies. Classically, regions beyond a horizon are inaccessible
to causal observers. However, quantum mechanical correlations may exist across
horizons that may influence local observations. For the case of de Sitter
space, w... | [
{
"created": "Fri, 3 Jun 2005 17:02:17 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Einhorn",
"Martin B",
""
],
[
"Mahato",
"Manavendra",
""
]
] | Cosmic horizons arise in general relativity in the context of black holes and in certain cosmologies. Classically, regions beyond a horizon are inaccessible to causal observers. However, quantum mechanical correlations may exist across horizons that may influence local observations. For the case of de Sitter space, we ... |
1202.4097 | Khaled Saaidi | Khaled Saaidi | Stability of Ghost Dark Energy in CBD Model of Gravity | 17 pages, 7 figures, Latex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of the ghost dark energy model versus perturbation.
Since this kind of dark energy is instable in Einsteinian general relativity
theory, then we study a new type of Brans-Dicke theory which has non-minimal
coupling with matter which is called chameleon Brans-Dicke (CBD) model of
gravity. Due to... | [
{
"created": "Sat, 18 Feb 2012 19:42:29 GMT",
"version": "v1"
}
] | 2012-02-21 | [
[
"Saaidi",
"Khaled",
""
]
] | We study the stability of the ghost dark energy model versus perturbation. Since this kind of dark energy is instable in Einsteinian general relativity theory, then we study a new type of Brans-Dicke theory which has non-minimal coupling with matter which is called chameleon Brans-Dicke (CBD) model of gravity. Due to t... |
2108.11795 | Jo\~ao Cavedagne Lobato | Jo\~ao C. Lobato, Isabela S. Matos, Lucas T. Santana, Ribamar R. R.
Reis, Maur\'icio O. Calv\~ao | Influence of gravitational waves upon light in the Minkowski background:
from null geodesics to interferometry | 25 pages, 6 figures, 1 table | Physical Review D 104, 024024 (2021) | 10.1103/PhysRevD.104.024024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have recently derived a manifestly covariant evolution law, under the
geometrical optics approximation of the vacuum Maxwell's equations, for the
electric field along null geodesics in a general spacetime, relative to an
arbitrary set of instantaneous observers [arXiv:2004.03496]. As one of its
applications, we de... | [
{
"created": "Sun, 11 Jul 2021 13:31:37 GMT",
"version": "v1"
}
] | 2021-08-27 | [
[
"Lobato",
"João C.",
""
],
[
"Matos",
"Isabela S.",
""
],
[
"Santana",
"Lucas T.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Calvão",
"Maurício O.",
""
]
] | We have recently derived a manifestly covariant evolution law, under the geometrical optics approximation of the vacuum Maxwell's equations, for the electric field along null geodesics in a general spacetime, relative to an arbitrary set of instantaneous observers [arXiv:2004.03496]. As one of its applications, we deri... |
1709.08020 | Lee Lindblom | Lee Lindblom, Nicholas W. Taylor, and Fan Zhang | Scalar, Vector and Tensor Harmonics on the Three-Sphere | 14 pages, 9 figures, to appear in General Relativity and Gravitation | null | 10.1007/s10714-017-2303-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar, vector and tensor harmonics on the three-sphere were introduced
originally to facilitate the study of various problems in gravitational
physics. These harmonics are defined as eigenfunctions of the covariant Laplace
operator which satisfy certain divergence and trace identities, and
ortho-normality conditions... | [
{
"created": "Sat, 23 Sep 2017 08:18:40 GMT",
"version": "v1"
}
] | 2017-11-01 | [
[
"Lindblom",
"Lee",
""
],
[
"Taylor",
"Nicholas W.",
""
],
[
"Zhang",
"Fan",
""
]
] | Scalar, vector and tensor harmonics on the three-sphere were introduced originally to facilitate the study of various problems in gravitational physics. These harmonics are defined as eigenfunctions of the covariant Laplace operator which satisfy certain divergence and trace identities, and ortho-normality conditions. ... |
gr-qc/0512098 | Wenbiao Liu | Wenbiao Liu | Hawking Radiation as Tunnelling in Static Black Holes | null | null | null | null | gr-qc | null | Hawking radiation can usefully be viewed as a semi-classical tunnelling
process that originates at the black hole horizon. The conservation of energy
implies the effect of self-gravitation. For a static black hole, a generalized
Painleve coordinate system is introduced, and Hawking radiation as tunnelling
under the e... | [
{
"created": "Fri, 16 Dec 2005 14:43:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Liu",
"Wenbiao",
""
]
] | Hawking radiation can usefully be viewed as a semi-classical tunnelling process that originates at the black hole horizon. The conservation of energy implies the effect of self-gravitation. For a static black hole, a generalized Painleve coordinate system is introduced, and Hawking radiation as tunnelling under the eff... |
gr-qc/9711061 | null | Thibault Damour | Gravitation and Experiment | 23 pages, Latex, psfig, 2 figures, to appear in the Proceedings of
Princeton's 250th Anniversary Conference on Critical Problems in Physics
(October 31-November 2, 1996) to be published by Princeton University Press
(1997) | null | null | IHES/P/97/51 | gr-qc | null | The confrontation between Einstein's gravitation theory and experimental
results, notably binary pulsar data, is summarized and its significance
discussed. Experiment and theory agree at the 10^{-3} level. All the basic
structures of Einstein's theory (coupling of gravity to matter; propagation and
self-interaction o... | [
{
"created": "Thu, 20 Nov 1997 16:15:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Damour",
"Thibault",
""
]
] | The confrontation between Einstein's gravitation theory and experimental results, notably binary pulsar data, is summarized and its significance discussed. Experiment and theory agree at the 10^{-3} level. All the basic structures of Einstein's theory (coupling of gravity to matter; propagation and self-interaction of ... |
1808.09643 | Tao Zhu | Wei-Jian Jin, Yongge Ma, and Tao Zhu | Pre-inflationary dynamics of Starobinsky inflation and its generization
in Loop Quantum Brans-Dicke Cosmology | 15 pages, 8 figures, 3 tables; v2: references and discussions added | JCAP 02(2019)010 | 10.1088/1475-7516/2019/02/010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the nonperturbative quantization scheme of loop quantum gravity has
been extended to the Brans-Dicke theory and the corresponding loop quantum
Brans-Dicke cosmology has been derived, which provides an essential platform to
explore inflationary models in this framework. In this paper, we consider two
inflati... | [
{
"created": "Wed, 29 Aug 2018 05:30:23 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jan 2019 03:10:22 GMT",
"version": "v2"
}
] | 2019-02-15 | [
[
"Jin",
"Wei-Jian",
""
],
[
"Ma",
"Yongge",
""
],
[
"Zhu",
"Tao",
""
]
] | Recently, the nonperturbative quantization scheme of loop quantum gravity has been extended to the Brans-Dicke theory and the corresponding loop quantum Brans-Dicke cosmology has been derived, which provides an essential platform to explore inflationary models in this framework. In this paper, we consider two inflation... |
2407.05270 | Handhika Ramadhan | Leonardus B. Putra and H. S. Ramadhan | Gravitational field and lensing of a circular chiral vorton | 31 pages, 11 captioned figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We derive the metric of a circular chiral vorton in the weak field limit. The
object is self-supporting by means of its chiral current. A conical singularity
with deficit angle, identical to that of straight string with the same linear
mass density, is present at the vorton's core. We find that the metric is akin
to ... | [
{
"created": "Sun, 7 Jul 2024 05:50:44 GMT",
"version": "v1"
}
] | 2024-07-09 | [
[
"Putra",
"Leonardus B.",
""
],
[
"Ramadhan",
"H. S.",
""
]
] | We derive the metric of a circular chiral vorton in the weak field limit. The object is self-supporting by means of its chiral current. A conical singularity with deficit angle, identical to that of straight string with the same linear mass density, is present at the vorton's core. We find that the metric is akin to th... |
2311.03160 | Yuri Obukhov | Yuri N. Obukhov, Friedrich W. Hehl | Nonmetricity and hypermomentum: on the possible violation of Lorentz
invariance | 15 pages, no figures, Revtex; Contributed paper to appear in the
volume "Tribute to Ruben Aldrovandi" (Editora Livraria da Fisica, Sao Paulo,
2024) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We outline how the symmetry groups of spacetime are interpreted in a
gauge-theoretic approach. Specifically, we focus on the hypermomentum concept
and discuss the hyperfluid, that appropriately generalizes the perfect (Euler)
fluid of general relativity to the case of continuous media with
microstructure. We demonstr... | [
{
"created": "Mon, 6 Nov 2023 14:57:31 GMT",
"version": "v1"
}
] | 2023-11-07 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | We outline how the symmetry groups of spacetime are interpreted in a gauge-theoretic approach. Specifically, we focus on the hypermomentum concept and discuss the hyperfluid, that appropriately generalizes the perfect (Euler) fluid of general relativity to the case of continuous media with microstructure. We demonstrat... |
1902.09452 | Marica Minucci | Marica Minucci | Hyperbolic Equations and General Relativity | 233 pages, 7 figures. arXiv admin note: text overlap with
arXiv:gr-qc/9506088, arXiv:gr-qc/0101076, arXiv:gr-qc/0607134,
arXiv:1801.01714, arXiv:1410.3971, arXiv:astro-ph/0504599 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the author Master's Thesis and its main purpose is to demonstrate
that it is possible to formulate Einstein's field equations as an initial value
problem. The first chapter concerns the hyperbolic equations theory. The
definition of hyperbolic equation is given and the concept of wavelike
propagation is prese... | [
{
"created": "Mon, 18 Feb 2019 16:13:23 GMT",
"version": "v1"
}
] | 2019-02-26 | [
[
"Minucci",
"Marica",
""
]
] | This is the author Master's Thesis and its main purpose is to demonstrate that it is possible to formulate Einstein's field equations as an initial value problem. The first chapter concerns the hyperbolic equations theory. The definition of hyperbolic equation is given and the concept of wavelike propagation is present... |
0812.4382 | Luca Antonio Forte Dr | Luca Antonio Forte | Arithmetical Chaos and Quantum Cosmology | 35 pages, 4 figures. to be published on Classical and Quantum Gravity
(scheduled for January 2009) | Class.Quant.Grav.26:045001,2009 | 10.1088/0264-9381/26/4/045001 | DSF/14/2008 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we present the formalism to start a quantum analysis for the
recent billiard representation introduced by Damour, Henneaux and Nicolai in
the study of the cosmological singularity. In particular we use the theory of
Maass automorphic forms and recent mathematical results about arithmetical
dynamical sys... | [
{
"created": "Tue, 23 Dec 2008 12:27:14 GMT",
"version": "v1"
}
] | 2009-02-23 | [
[
"Forte",
"Luca Antonio",
""
]
] | In this note, we present the formalism to start a quantum analysis for the recent billiard representation introduced by Damour, Henneaux and Nicolai in the study of the cosmological singularity. In particular we use the theory of Maass automorphic forms and recent mathematical results about arithmetical dynamical syste... |
1510.06676 | Martin Kr\v{s}\v{s}\'ak | Martin Kr\v{s}\v{s}\'ak | Holographic Renormalization in Teleparallel Gravity | 9 pages, v3: Extended discussion on reference tetrads. Matches the
published version | Eur.Phys.J. C77 (2017) no.1, 44 | 10.1140/epjc/s10052-017-4621-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of IR divergences of the action in the covariant
formulation of teleparallel gravity in asymptotically Minkowski spacetimes. We
show that divergences are caused by inertial effects and can be removed by
adding an appropriate surface term, leading to the renormalized action. This
process can be... | [
{
"created": "Thu, 22 Oct 2015 16:26:49 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2016 18:37:51 GMT",
"version": "v2"
},
{
"created": "Thu, 25 May 2017 16:04:41 GMT",
"version": "v3"
}
] | 2017-05-26 | [
[
"Krššák",
"Martin",
""
]
] | We consider the problem of IR divergences of the action in the covariant formulation of teleparallel gravity in asymptotically Minkowski spacetimes. We show that divergences are caused by inertial effects and can be removed by adding an appropriate surface term, leading to the renormalized action. This process can be v... |
1110.1720 | Debraj Roy | Rabin Banerjee and Debraj Roy | Poincar\'{e} gauge symmetries, hamiltonian symmetries and trivial gauge
transformations | 13 pages, LaTeX2e, no figures; (v2) 14 pages, LaTeX2e, no figures,
some comments added, journal version | Phys.Rev.D84:124034,2011 | 10.1103/PhysRevD.84.124034 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We resolve a problem of finding the Poincare symmetries from hamiltonian
gauge symmetries constructed through a canonical procedure of handling
constrained systems. Through the use of Noether identities corresponding to the
symmetries, we motivate a procedure of finding the map between the hamiltonian
and Poincare ga... | [
{
"created": "Sat, 8 Oct 2011 10:52:49 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Dec 2011 08:10:43 GMT",
"version": "v2"
}
] | 2011-12-21 | [
[
"Banerjee",
"Rabin",
""
],
[
"Roy",
"Debraj",
""
]
] | We resolve a problem of finding the Poincare symmetries from hamiltonian gauge symmetries constructed through a canonical procedure of handling constrained systems. Through the use of Noether identities corresponding to the symmetries, we motivate a procedure of finding the map between the hamiltonian and Poincare gaug... |
gr-qc/0306043 | Bartolome Coll | Bartolom\'e Coll | A principal positioning system for the Earth | null | null | null | null | gr-qc | null | The project SYPOR wishes to use the global navigation satellite system
GALILEO as an autonomous relativistic positioning system for the Earth.
Motivations and a sketch of the basic concepts underlying the project are
presented. For non geodetic (perturbed) satellites, a two-dimensional example
describes how the dynam... | [
{
"created": "Tue, 10 Jun 2003 15:38:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Coll",
"Bartolomé",
""
]
] | The project SYPOR wishes to use the global navigation satellite system GALILEO as an autonomous relativistic positioning system for the Earth. Motivations and a sketch of the basic concepts underlying the project are presented. For non geodetic (perturbed) satellites, a two-dimensional example describes how the dynamic... |
gr-qc/0611125 | Valter Moretti | Valter Moretti (Math. Dept. Trento University, INdAM, INFN) | Some recent results in scalar quantum field theory in globally
hyperbolic asymptotically flat spacetimes | 10 pages, 2 figures, invited plenary talk at the XVII SIGRAV
Conference held in Torino, September 4-7, 2006 | null | null | UTM-706 | gr-qc | null | Some recent results obtained by the author and collaborators about QFT in
asymptotically flat spacetimes at null infinity are summarized and reviewed. In
particular it is focused on the physical properties of ground states in the
bulk induced by the BMS-invariant state defined at null infinity.
| [
{
"created": "Thu, 23 Nov 2006 15:08:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moretti",
"Valter",
"",
"Math. Dept. Trento University, INdAM, INFN"
]
] | Some recent results obtained by the author and collaborators about QFT in asymptotically flat spacetimes at null infinity are summarized and reviewed. In particular it is focused on the physical properties of ground states in the bulk induced by the BMS-invariant state defined at null infinity. |
gr-qc/0311013 | Ernesto F. Eiroa | Ernesto F. Eiroa, Diego F. Torres | Strong field limit analysis of gravitational retro-lensing | 11 pages, 1 figure; v2: minor changes. Accepted for publication in
Physical Review D | Phys.Rev. D69 (2004) 063004 | 10.1103/PhysRevD.69.063004 | null | gr-qc astro-ph | null | We present a complete treatment in the strong field limit of gravitational
retro-lensing by a static spherically symmetric compact object having a photon
sphere. The results are compared with those corresponding to ordinary lensing
in similar strong field situations. As examples of application of the
formalism, a sup... | [
{
"created": "Tue, 4 Nov 2003 22:58:40 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Dec 2003 16:11:12 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Torres",
"Diego F.",
""
]
] | We present a complete treatment in the strong field limit of gravitational retro-lensing by a static spherically symmetric compact object having a photon sphere. The results are compared with those corresponding to ordinary lensing in similar strong field situations. As examples of application of the formalism, a super... |
2312.06780 | Damianos Iosifidis | Damianos Iosifidis, Tomi S. Koivisto | Hyperhydrodynamics: Relativistic Viscous Fluids Emerging from
Hypermomentum | 38 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore a new action formulation of hyperfluids, fluids with intrinsic
hypermomentum. Brown's Lagrangian for a relativistic perfect fluid is
generalised by incorporating the degrees of freedom encoded in the
hypermomentum tensor, namely by including connection-matter couplings. Quite
interestingly, generic hyperfl... | [
{
"created": "Mon, 11 Dec 2023 19:00:32 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2024 08:02:52 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Apr 2024 11:56:07 GMT",
"version": "v3"
}
] | 2024-04-12 | [
[
"Iosifidis",
"Damianos",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | We explore a new action formulation of hyperfluids, fluids with intrinsic hypermomentum. Brown's Lagrangian for a relativistic perfect fluid is generalised by incorporating the degrees of freedom encoded in the hypermomentum tensor, namely by including connection-matter couplings. Quite interestingly, generic hyperflui... |
gr-qc/0107048 | L. C. Garcia de Andrade | L.C.Garcia de Andrade | Detecting torsion from LISA and teleparallel gravity | Latex file | null | null | null | gr-qc | null | Torsion detection from totally skew symmetric torsion waves in the context of
teleparallel gravity is discussed. A gedanken experiment to detect Cartan's
contortion based on a circle of particles not necessarily spinning is proposed.
It is shown that by making use of previous value of contortion at the surface
of the... | [
{
"created": "Fri, 13 Jul 2001 03:27:06 GMT",
"version": "v1"
},
{
"created": "Wed, 22 May 2002 08:14:50 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Torsion detection from totally skew symmetric torsion waves in the context of teleparallel gravity is discussed. A gedanken experiment to detect Cartan's contortion based on a circle of particles not necessarily spinning is proposed. It is shown that by making use of previous value of contortion at the surface of the E... |
0705.3902 | Marco Spaans | M. Spaans | A Derivation of Einstein Gravity without the Axiom of Choice: Topology
Hidden in GR | final edits: more detail on derivation of equations of motion for q | null | null | null | gr-qc hep-th math-ph math.MP | null | A derivation of the equations of motion of general relativity is presented
that does not invoke the Axiom of Choice, but requires the explicit
construction of a choice function q for continuous three-space regions. The
motivation for this (seemingly academic) endeavour is to take the background
independence intrinsic... | [
{
"created": "Sat, 26 May 2007 17:30:42 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2007 19:45:13 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Jun 2007 19:57:11 GMT",
"version": "v3"
}
] | 2007-06-17 | [
[
"Spaans",
"M.",
""
]
] | A derivation of the equations of motion of general relativity is presented that does not invoke the Axiom of Choice, but requires the explicit construction of a choice function q for continuous three-space regions. The motivation for this (seemingly academic) endeavour is to take the background independence intrinsic t... |
2112.09978 | Gonzalo Olmo | Victor I. Afonso, Cecilia Bejarano, Rafael Ferraro, and Gonzalo J.
Olmo | Determinantal Born-Infeld Coupling of Gravity and Electromagnetism | 12 pages, 1 figure | Phys. Rev. D 105, 084067 (2022) | 10.1103/PhysRevD.105.084067 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a Born-Infeld inspired model of gravity and electromagnetism in
which both types of fields are treated on an equal footing via a determinantal
approach in a metric-affine formulation. Though this formulation is a priori in
conflict with the postulates of metric theories of gravity, we find that the
resulting... | [
{
"created": "Sat, 18 Dec 2021 17:52:19 GMT",
"version": "v1"
}
] | 2022-05-03 | [
[
"Afonso",
"Victor I.",
""
],
[
"Bejarano",
"Cecilia",
""
],
[
"Ferraro",
"Rafael",
""
],
[
"Olmo",
"Gonzalo J.",
""
]
] | We study a Born-Infeld inspired model of gravity and electromagnetism in which both types of fields are treated on an equal footing via a determinantal approach in a metric-affine formulation. Though this formulation is a priori in conflict with the postulates of metric theories of gravity, we find that the resulting e... |
1212.5848 | Cosimo Bambi | Zilong Li, Cosimo Bambi | Super-spinning compact objects generated by thick accretion disks | 1+16 pages, 4 figures. v2: refereed version. v3: indicated the
corresponding author | JCAP 1303:031,2013 | 10.1088/1475-7516/2013/03/031 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If astrophysical black hole candidates are the Kerr black holes predicted by
General Relativity, the value of their spin parameter must be subject to the
theoretical bound $|a_*| \le 1$. In this work, we consider the possibility that
these objects are either non-Kerr black holes in an alternative theory of
gravity or... | [
{
"created": "Mon, 24 Dec 2012 00:50:39 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Mar 2013 17:54:39 GMT",
"version": "v2"
},
{
"created": "Thu, 30 May 2013 08:38:05 GMT",
"version": "v3"
}
] | 2013-05-31 | [
[
"Li",
"Zilong",
""
],
[
"Bambi",
"Cosimo",
""
]
] | If astrophysical black hole candidates are the Kerr black holes predicted by General Relativity, the value of their spin parameter must be subject to the theoretical bound $|a_*| \le 1$. In this work, we consider the possibility that these objects are either non-Kerr black holes in an alternative theory of gravity or e... |
gr-qc/0604019 | Edisom S. Moreira jr | E. S. Moreira, Jr. and E. S. Oliveira | Specific heat of a particle on the cone | 7 pages, 1 figure, REVTeX4 file. Version to appear in Physical Review
A | Phys.Rev. A73 (2006) 052105 | 10.1103/PhysRevA.73.052105 | null | gr-qc quant-ph | null | This work investigates how a conical singularity can affect the specific heat
of systems. A free nonrelativistic particle confined to the lateral surface of
a cone -- conical box -- is taken as a toy model. Its specific heat is
determined as a function of the deficit angle and the temperature. For a
vanishing deficit... | [
{
"created": "Wed, 5 Apr 2006 12:32:41 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Moreira,",
"E. S.",
"Jr."
],
[
"Oliveira",
"E. S.",
""
]
] | This work investigates how a conical singularity can affect the specific heat of systems. A free nonrelativistic particle confined to the lateral surface of a cone -- conical box -- is taken as a toy model. Its specific heat is determined as a function of the deficit angle and the temperature. For a vanishing deficit a... |
2210.17162 | Chandrachur Chakraborty | Chandrachur Chakraborty (MCNS-MAHE, India), Parthasarathi Majumdar
(IACS, India) | Gravitational Larmor precession | 9 pages including 2 figures, matches published version | Eur. Phys. J. C (Letter) 83, 714 (2023) | 10.1140/epjc/s10052-023-11858-4 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspired by the reported existence of substantive magnetic fields in the
vicinity of the central supermassive black holes in Sagitarius A* and Messier
87*, we consider test particle motion in the spacetime close to a generic
spherical black hole in the presence of magnetic fields in its vicinity.
Modelling such a spa... | [
{
"created": "Mon, 31 Oct 2022 09:18:48 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2023 03:19:28 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Aug 2023 09:05:53 GMT",
"version": "v3"
}
] | 2023-08-11 | [
[
"Chakraborty",
"Chandrachur",
"",
"MCNS-MAHE, India"
],
[
"Majumdar",
"Parthasarathi",
"",
"IACS, India"
]
] | Inspired by the reported existence of substantive magnetic fields in the vicinity of the central supermassive black holes in Sagitarius A* and Messier 87*, we consider test particle motion in the spacetime close to a generic spherical black hole in the presence of magnetic fields in its vicinity. Modelling such a space... |
1702.05908 | Alfred Molina | A. Molina and E. Ruiz | An approximate global solution of Einstein's equations for
differentially rotating compact body | 14 pages. arXiv admin note: text overlap with arXiv:gr-qc/0611013 | null | 10.1007/s10714-017-2297-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an approximate global stationary and axisymmetric solution of
Einstein's equations which can be thought as a simple star model: a
self-gravitating perfect fluid ball with a differential rotation motion
pattern. Using the post--Minkowskian formalism (weak field approximation) and
considering rotation as a pe... | [
{
"created": "Mon, 20 Feb 2017 09:37:47 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2017 08:23:34 GMT",
"version": "v2"
}
] | 2017-10-04 | [
[
"Molina",
"A.",
""
],
[
"Ruiz",
"E.",
""
]
] | We obtain an approximate global stationary and axisymmetric solution of Einstein's equations which can be thought as a simple star model: a self-gravitating perfect fluid ball with a differential rotation motion pattern. Using the post--Minkowskian formalism (weak field approximation) and considering rotation as a pert... |
2203.10607 | Kaushik Bhattacharya | Saddam Hussain, Anirban Chatterjee, Kaushik Bhattacharya | Ghost condensates and pure kinetic $k$-essence condensates in presence
of field-fluid non-minimal coupling in the dark sector | Corrected and modified version. 25 pages, Accepted for publication in
Universe | Universe 2023, 9(2), 65 | 10.3390/universe9020065 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this article we try to find out the conditions when a ghost field in
conjunction with a barotropic fluid produces a stable accelerating expansion
phase of the universe. It is seen that in many cases the ghost field produces a
condensate and drives the fluid energy density to zero in the final
accelerating phase, b... | [
{
"created": "Sun, 20 Mar 2022 17:42:48 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Dec 2022 10:40:58 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Jan 2023 06:53:22 GMT",
"version": "v3"
}
] | 2023-02-08 | [
[
"Hussain",
"Saddam",
""
],
[
"Chatterjee",
"Anirban",
""
],
[
"Bhattacharya",
"Kaushik",
""
]
] | In this article we try to find out the conditions when a ghost field in conjunction with a barotropic fluid produces a stable accelerating expansion phase of the universe. It is seen that in many cases the ghost field produces a condensate and drives the fluid energy density to zero in the final accelerating phase, but... |
1801.05549 | Matt Visser | Sebastian Schuster (1) and Matt Visser (1) ((1) Victoria University of
Wellington) | Bespoke analogue space-times: Meta-material mimics | 22 pages | General Relativity and Gravitation 50 (2018) 55 | 10.1007/s10714-018-2376-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modern meta-materials allow one to construct electromagnetic media with
almost arbitrary bespoke permittivity, permeability, and magneto-electric
tensors. If (and only if) the permittivity, permeability, and magneto-electric
tensors satisfy certain stringent compatibility conditions, can the
meta-material be fully de... | [
{
"created": "Wed, 17 Jan 2018 05:03:02 GMT",
"version": "v1"
}
] | 2018-08-16 | [
[
"Schuster",
"Sebastian",
""
],
[
"Visser",
"Matt",
""
]
] | Modern meta-materials allow one to construct electromagnetic media with almost arbitrary bespoke permittivity, permeability, and magneto-electric tensors. If (and only if) the permittivity, permeability, and magneto-electric tensors satisfy certain stringent compatibility conditions, can the meta-material be fully desc... |
0706.2179 | Francisco Diego Mazzitelli | Diana L\'opez Nacir and Francisco D. Mazzitelli | Backreaction in trans-Planckian cosmology: renormalization, trace
anomaly and selfconsistent solutions | 19 pages, 3 figures | Phys.Rev.D76:024013,2007 | 10.1103/PhysRevD.76.024013 | null | gr-qc hep-th | null | We analyze the semiclassical Einstein equations for quantum scalar fields
satisfying modified dispersion relations. We first discuss in detail the
renormalization procedure based on adiabatic subtraction and dimensional
regularization. We show that, contrary to what expected from power counting
arguments, in 3+1 dime... | [
{
"created": "Thu, 14 Jun 2007 19:34:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Nacir",
"Diana López",
""
],
[
"Mazzitelli",
"Francisco D.",
""
]
] | We analyze the semiclassical Einstein equations for quantum scalar fields satisfying modified dispersion relations. We first discuss in detail the renormalization procedure based on adiabatic subtraction and dimensional regularization. We show that, contrary to what expected from power counting arguments, in 3+1 dimens... |
gr-qc/9510002 | null | Alpan Raval, B.L. Hu and James Anglin | Stochastic Theory of Accelerated Detectors in a Quantum Field | 32 pages, Latex | Phys.Rev. D53 (1996) 7003-7019 | 10.1103/PhysRevD.53.7003 | IASSNS-HEP-95/39, UMDPP 95-131, LA-UR-95-1736 | gr-qc atom-ph hep-th quant-ph | null | We analyze the statistical mechanical properties of n-detectors in arbitrary
states of motion interacting with each other via a quantum field. We use the
open system concept and the influence functional method to calculate the
influence of quantum fields on detectors in motion, and the mutual influence of
detectors v... | [
{
"created": "Tue, 3 Oct 1995 02:12:54 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Raval",
"Alpan",
""
],
[
"Hu",
"B. L.",
""
],
[
"Anglin",
"James",
""
]
] | We analyze the statistical mechanical properties of n-detectors in arbitrary states of motion interacting with each other via a quantum field. We use the open system concept and the influence functional method to calculate the influence of quantum fields on detectors in motion, and the mutual influence of detectors via... |
gr-qc/0205088 | Hernando Quevedo | Leonardo Pati\~no and Hernando Quevedo | Bosonic and fermionic behavior in gravitational configurations | 7 pages, revtex, no figures | Mod.Phys.Lett. A18 (2003) 1331 | 10.1142/S0217732303011083 | null | gr-qc | null | We extend Dirac's approach about the quantization of the electric charge to
the case of gravitational configurations. The spacetime curvature is used to
define a phase-like object which allows us to extract information about the
behavior of the corresponding spacetime. We show that all spacetimes that
satisfy certain... | [
{
"created": "Mon, 20 May 2002 22:07:28 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Patiño",
"Leonardo",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We extend Dirac's approach about the quantization of the electric charge to the case of gravitational configurations. The spacetime curvature is used to define a phase-like object which allows us to extract information about the behavior of the corresponding spacetime. We show that all spacetimes that satisfy certain s... |
0907.4064 | Kirill Krasnov | Kirill Krasnov | Gravity as BF theory plus potential | 7 pages, published in Proceedings of the Second Workshop on Quantum
Gravity and Noncommutative Geometry (Lisbon, Portugal) | Int.J.Mod.Phys.A24:2776-2782,2009 | 10.1142/S0217751X09046151 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin foam models of quantum gravity are based on Plebanski's formulation of
general relativity as a constrained BF theory. We give an alternative
formulation of gravity as BF theory plus a certain potential term for the
B-field. When the potential is taken to be infinitely steep one recovers
general relativity. For a... | [
{
"created": "Thu, 23 Jul 2009 13:33:57 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Krasnov",
"Kirill",
""
]
] | Spin foam models of quantum gravity are based on Plebanski's formulation of general relativity as a constrained BF theory. We give an alternative formulation of gravity as BF theory plus a certain potential term for the B-field. When the potential is taken to be infinitely steep one recovers general relativity. For a g... |
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