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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0805.0019 | Richard Obousy Mr | Richard K. Obousy and Gerald Cleaver | Radius Destabilization in Five Dimensional Orbifolds Due to an Enhanced
Casimir Effect | null | Mod.Phys.Lett.A24:1495-1506,2009 | 10.1142/S0217732309030941 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the challenges in connecting higher dimensional theories to cosmology
is stabilization of the moduli fields. We investigate the role of a Lorentz
violating vector field in the context of stabilization. Specifically, we
compute the one loop Casimir energy in Randall-Sundrum 5-dimensional
(non-supersymmetric) S^... | [
{
"created": "Wed, 30 Apr 2008 23:52:26 GMT",
"version": "v1"
},
{
"created": "Wed, 14 May 2008 19:45:06 GMT",
"version": "v2"
}
] | 2009-09-17 | [
[
"Obousy",
"Richard K.",
""
],
[
"Cleaver",
"Gerald",
""
]
] | One of the challenges in connecting higher dimensional theories to cosmology is stabilization of the moduli fields. We investigate the role of a Lorentz violating vector field in the context of stabilization. Specifically, we compute the one loop Casimir energy in Randall-Sundrum 5-dimensional (non-supersymmetric) S^1/... |
1212.3645 | Wei-Tou Ni | Hanns Selig, Claus Laemmerzahl and Wei-Tou Ni | Astrodynamical Space Test of Relativity using Optical Devices I (ASTROD
I) - Mission Overview | 10 pages,5 figures, 1 tables,to be published in IJMPD Vol. 22,1341003
(2013) | International Journal of Modern Physics D, Vol. 22, No. 1, 1341003
(2013) | 10.1142/S0218271813410034 | null | gr-qc astro-ph.EP astro-ph.IM physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | ASTROD I is the first planned space mission in a series of ASTROD missions
for testing relativity in space using optical devices. The main aims are: (i)
to test General Relativity with an improvement of three orders of magnitude
compared to current results, (ii) to measure solar and solar system parameters
with impro... | [
{
"created": "Sat, 15 Dec 2012 01:18:13 GMT",
"version": "v1"
}
] | 2013-01-09 | [
[
"Selig",
"Hanns",
""
],
[
"Laemmerzahl",
"Claus",
""
],
[
"Ni",
"Wei-Tou",
""
]
] | ASTROD I is the first planned space mission in a series of ASTROD missions for testing relativity in space using optical devices. The main aims are: (i) to test General Relativity with an improvement of three orders of magnitude compared to current results, (ii) to measure solar and solar system parameters with improve... |
1512.05711 | Stoytcho Yazadjiev | Stoytcho S. Yazadjiev, Daniela D. Doneva | Comment on "The Mass-Radius relation for Neutron Stars in $f(R)$
gravity" by S. Capozziello, M. De Laurentis, R. Farinelli and S. Odintsov | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present comment we discuss the qualitative and the quantitative
differences between the neutron stars models in $f(R)$ gravity presented in the
recent paper \cite{Capozziello2015} (Capozziello et al. (2015)) and in our
paper \cite{Yazadjiev2014} (Yazadjiev et al. (2014)). The authors of
\cite{Capozziello2015} ... | [
{
"created": "Thu, 17 Dec 2015 18:31:25 GMT",
"version": "v1"
}
] | 2015-12-18 | [
[
"Yazadjiev",
"Stoytcho S.",
""
],
[
"Doneva",
"Daniela D.",
""
]
] | In the present comment we discuss the qualitative and the quantitative differences between the neutron stars models in $f(R)$ gravity presented in the recent paper \cite{Capozziello2015} (Capozziello et al. (2015)) and in our paper \cite{Yazadjiev2014} (Yazadjiev et al. (2014)). The authors of \cite{Capozziello2015} cl... |
gr-qc/9807078 | Winfried Zimdahl | Winfried Zimdahl and Alexander B. Balakin | Kinetic theory for nongeodesic particle motion: Selfinteracting
equilibrium states and effective viscous fluid pressures | 16 pages, latex, uses ioplppt.sty. To appear in Class. Quantum Grav | Class.Quant.Grav. 15 (1998) 3259-3270 | 10.1088/0264-9381/15/10/026 | null | gr-qc astro-ph | null | The particles of a classical relativistic gas are supposed to move under the
influence of a quasilinear (in the particle four-momenta), self-interacting
force inbetween elastic, binary collisions. This force which is completely
fixed by the equilibrium conditions of the gas, gives rise to an effective
viscous pressur... | [
{
"created": "Wed, 29 Jul 1998 07:51:33 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Zimdahl",
"Winfried",
""
],
[
"Balakin",
"Alexander B.",
""
]
] | The particles of a classical relativistic gas are supposed to move under the influence of a quasilinear (in the particle four-momenta), self-interacting force inbetween elastic, binary collisions. This force which is completely fixed by the equilibrium conditions of the gas, gives rise to an effective viscous pressure ... |
gr-qc/0703114 | Ingemar Bengtsson | Ingemar Bengtsson | Note on non-metric gravity | 9 pages | Mod.Phys.Lett.A22:1643-1649,2007 | 10.1142/S0217732307023924 | null | gr-qc | null | We discuss a class of alternative gravity theories that are specific to four
dimensions, do not introduce new degrees of freedom, and come with a physical
motivation. In particular we sketch their Hamiltonian formulation, and their
relation to some earlier constructions.
| [
{
"created": "Thu, 22 Mar 2007 13:53:31 GMT",
"version": "v1"
}
] | 2010-10-27 | [
[
"Bengtsson",
"Ingemar",
""
]
] | We discuss a class of alternative gravity theories that are specific to four dimensions, do not introduce new degrees of freedom, and come with a physical motivation. In particular we sketch their Hamiltonian formulation, and their relation to some earlier constructions. |
1210.6920 | Robert Milson | Robert Milson and Lode Wylleman | Three-dimensional spacetimes of maximal order | final revisions | CQG vol 30, 2013, 095004 | 10.1088/0264-9381/30/9/095004 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the equivalence problem for three-dimensional Lorentzian
manifolds requires at most the fifth covariant derivative of the curvature
tensor. We prove that this bound is sharp by exhibiting a class of 3D
Lorentzian manifolds which realize this bound. The analysis is based on a
three-dimensional analogue of... | [
{
"created": "Thu, 25 Oct 2012 17:38:10 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Dec 2012 23:34:00 GMT",
"version": "v2"
},
{
"created": "Sat, 13 Apr 2013 13:11:12 GMT",
"version": "v3"
}
] | 2013-04-16 | [
[
"Milson",
"Robert",
""
],
[
"Wylleman",
"Lode",
""
]
] | We show that the equivalence problem for three-dimensional Lorentzian manifolds requires at most the fifth covariant derivative of the curvature tensor. We prove that this bound is sharp by exhibiting a class of 3D Lorentzian manifolds which realize this bound. The analysis is based on a three-dimensional analogue of t... |
2209.00144 | Abdallah Al Zahrani M. | A. M. Al Zahrani | Charged Particles Circular Orbits around Weakly Charged and Magnetized
Kerr Black Holes | Accepted for publication in the Astrophysical Journal. arXiv admin
note: substantial text overlap with arXiv:2208.13956 | ApJ 937 50 (2022) | 10.3847/1538-4357/ac8cf0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the circular orbits of charged particles around a weakly charged
Kerr black hole immersed in a weak, axisymmetric magnetic field. Firstly, we
review the circular orbits of neutral particles. We then review the circular
orbits of charged particles around a weakly charged Kerr black hole and weakly
magnetized ... | [
{
"created": "Wed, 31 Aug 2022 22:30:27 GMT",
"version": "v1"
}
] | 2022-10-04 | [
[
"Zahrani",
"A. M. Al",
""
]
] | We study the circular orbits of charged particles around a weakly charged Kerr black hole immersed in a weak, axisymmetric magnetic field. Firstly, we review the circular orbits of neutral particles. We then review the circular orbits of charged particles around a weakly charged Kerr black hole and weakly magnetized Ke... |
2308.11719 | Suvikranth Gera | Suvikranth Gera, Poulami Dutta Roy | Black holes in degenerate Einstein Gauss-Bonnet gravity: Can QNMs
distinguish them from GR? | 29 pages, 10 figures , 7 tables. Appendix added Version matches with
the journal version | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this study, for the first time, we analyse the quasinormal modes of black
holes occurring within the framework of degenerate gravity. We investigate the
properties of the asymptotically flat spacetimes introduced recently in [JCAP
02(2022)02] that satisfy degenerate Einstein Gauss-Bonnet(dEGB) action and
belong to... | [
{
"created": "Tue, 22 Aug 2023 18:09:35 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2024 13:30:21 GMT",
"version": "v2"
}
] | 2024-04-18 | [
[
"Gera",
"Suvikranth",
""
],
[
"Roy",
"Poulami Dutta",
""
]
] | In this study, for the first time, we analyse the quasinormal modes of black holes occurring within the framework of degenerate gravity. We investigate the properties of the asymptotically flat spacetimes introduced recently in [JCAP 02(2022)02] that satisfy degenerate Einstein Gauss-Bonnet(dEGB) action and belong to a... |
gr-qc/9803064 | Rhett Herman | Rhett Herman (Radford University) | A method for calculating the imaginary part of the Hadamard Elementary
function $G^{(1)}$ in static, spherically symmetric spacetimes | 27 pages, ReVTeX | Phys.Rev.D58:084028,1998 | 10.1103/PhysRevD.58.084028 | RU-PHYS-9801 | gr-qc | null | Whenever real particle production occurs in quantum field theory, the
imaginary part of the Hadamard Elementary function $G^{(1)}$ is non-vanishing.
A method is presented whereby the imaginary part of $G^{(1)}$ may be calculated
for a charged scalar field in a static spherically symmetric spacetime with
arbitrary cur... | [
{
"created": "Wed, 18 Mar 1998 13:53:25 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Aug 1998 21:27:14 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Herman",
"Rhett",
"",
"Radford University"
]
] | Whenever real particle production occurs in quantum field theory, the imaginary part of the Hadamard Elementary function $G^{(1)}$ is non-vanishing. A method is presented whereby the imaginary part of $G^{(1)}$ may be calculated for a charged scalar field in a static spherically symmetric spacetime with arbitrary curva... |
2111.10860 | Theodore Anton | Theodore Anton and Timothy Clifton | The momentum constraint equation in Parameterised Post-Newtonian
Cosmology | 26 pages, 2 figures, v2. Matches version published in CQG | Class. Quantum Grav. 39 (2022) 095005 | 10.1088/1361-6382/ac5fc3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a theory-independent version of the momentum constraint equation
for use in cosmology, as a part of the Parameterised Post-Newtonian Cosmology
(PPNC) framework. Our equations are constructed by adapting the corresponding
quantities from formalisms devised for testing and constraining gravity in
isolated ast... | [
{
"created": "Sun, 21 Nov 2021 17:02:41 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2022 09:40:50 GMT",
"version": "v2"
}
] | 2022-05-06 | [
[
"Anton",
"Theodore",
""
],
[
"Clifton",
"Timothy",
""
]
] | We derive a theory-independent version of the momentum constraint equation for use in cosmology, as a part of the Parameterised Post-Newtonian Cosmology (PPNC) framework. Our equations are constructed by adapting the corresponding quantities from formalisms devised for testing and constraining gravity in isolated astro... |
gr-qc/0701044 | Chengmin Zhang | C.M. Zhang | General description of Dirac spin-rotation effect with relativistic
factor | 8 pages, accepted by IJMPD 2007 | Int.J.Mod.Phys.D16:737-744,2007 | 10.1142/S0218271807009875 | null | gr-qc | null | The Mashhoon rotation-spin coupling is studied by means of the parallelism
description of general relativity. The relativistic rotational tetrad is
exploited, which results in the Minkowski metric, and the torsion axial-vector
and Dirac spin coupling will give the Mashhoon rotation-spin term. For the high
speed rotat... | [
{
"created": "Sun, 7 Jan 2007 09:48:15 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zhang",
"C. M.",
""
]
] | The Mashhoon rotation-spin coupling is studied by means of the parallelism description of general relativity. The relativistic rotational tetrad is exploited, which results in the Minkowski metric, and the torsion axial-vector and Dirac spin coupling will give the Mashhoon rotation-spin term. For the high speed rotatin... |
1812.06068 | Song Ming Du | Song Ming Du | Scalar Stochastic Gravitational-Wave Background in Brans-Dicke Theory of
Gravity | 9 pages, 8 figures | Phys. Rev. D 99, 044057 (2019) | 10.1103/PhysRevD.99.044057 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the scalar stochastic gravitational-wave background (SGWB) from
astrophysical sources, including compact binary mergers and stellar collapses,
in the Bras-Dicke theory of gravity. By contrast to tensor waves, we found the
scalar SGWB to predominantly arise from stellar collapses. These collapses not
only tak... | [
{
"created": "Fri, 14 Dec 2018 18:33:19 GMT",
"version": "v1"
}
] | 2019-03-04 | [
[
"Du",
"Song Ming",
""
]
] | We study the scalar stochastic gravitational-wave background (SGWB) from astrophysical sources, including compact binary mergers and stellar collapses, in the Bras-Dicke theory of gravity. By contrast to tensor waves, we found the scalar SGWB to predominantly arise from stellar collapses. These collapses not only take ... |
1404.2944 | Steffen Gielen | Steffen Gielen | Quantum cosmology of (loop) quantum gravity condensates: An example | 22 pages, IOP style; v2: revised discussion of explicit solutions in
section 4, minor changes in the rest, main conclusions are unchanged; v3:
expanded discussion, minor changes to match published version | Class. Quantum Grav. 31 (2014) 155009 | 10.1088/0264-9381/31/15/155009 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spatially homogeneous universes can be described in (loop) quantum gravity as
condensates of elementary excitations of space. Their treatment is easiest in
the second-quantised group field theory formalism which allows the adaptation
of techniques from the description of Bose-Einstein condensates in condensed
matter ... | [
{
"created": "Thu, 10 Apr 2014 20:24:46 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jun 2014 20:26:14 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Jul 2014 19:21:16 GMT",
"version": "v3"
}
] | 2014-07-24 | [
[
"Gielen",
"Steffen",
""
]
] | Spatially homogeneous universes can be described in (loop) quantum gravity as condensates of elementary excitations of space. Their treatment is easiest in the second-quantised group field theory formalism which allows the adaptation of techniques from the description of Bose-Einstein condensates in condensed matter ph... |
gr-qc/9810086 | Dr N. Mavromatos | John Ellis, N.E. Mavromatos and D.V. Nanopoulos | Time-Dependent Vacuum Energy Induced by D-Particle Recoil | 14 pages LATEX, no figures | Gen.Rel.Grav.32:943-958,2000 | 10.1023/A:1001993226227 | ACT-9-98, CTP-TAMU-39-98, OUTP-98-74P | gr-qc astro-ph hep-th | null | We consider cosmology in the framework of a `material reference system' of D
particles, including the effects of quantum recoil induced by closed-string
probe particles. We find a time-dependent contribution to the cosmological
vacuum energy, which relaxes to zero as $\sim 1/ t^2$ for large times $t$. If
this energy ... | [
{
"created": "Thu, 29 Oct 1998 12:57:44 GMT",
"version": "v1"
}
] | 2009-09-11 | [
[
"Ellis",
"John",
""
],
[
"Mavromatos",
"N. E.",
""
],
[
"Nanopoulos",
"D. V.",
""
]
] | We consider cosmology in the framework of a `material reference system' of D particles, including the effects of quantum recoil induced by closed-string probe particles. We find a time-dependent contribution to the cosmological vacuum energy, which relaxes to zero as $\sim 1/ t^2$ for large times $t$. If this energy de... |
0801.4090 | Jonathan Middleton | Jonathan Middleton and John D. Barrow | The Stability of an Isotropic Cosmological Singularity in Higher-Order
Gravity | 25 pages | Phys.Rev.D77:103523,2008 | 10.1103/PhysRevD.77.103523 | null | gr-qc astro-ph hep-th | null | We study the stability of the isotropic vacuum Friedmann universe in gravity
theories with higher-order curvature terms of the form $(R_{ab}R^{ab})^{n}$
added to the Einstein-Hilbert Lagrangian of general relativity on approach to
an initial cosmological singularity. Earlier, we had shown that, when $% n=1$,
a specia... | [
{
"created": "Sat, 26 Jan 2008 18:00:34 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Middleton",
"Jonathan",
""
],
[
"Barrow",
"John D.",
""
]
] | We study the stability of the isotropic vacuum Friedmann universe in gravity theories with higher-order curvature terms of the form $(R_{ab}R^{ab})^{n}$ added to the Einstein-Hilbert Lagrangian of general relativity on approach to an initial cosmological singularity. Earlier, we had shown that, when $% n=1$, a special ... |
2205.03799 | Saeed Rastgoo | Saeed Rastgoo, Saurya Das | Probing the interior of the Schwarzschild black hole using congruences:
LQG vs. GUP | 38 pages, 21 figures, invited paper to "Universe" Special Issue
"Gravitational Singularities and Their Quantum Fates". Version 2: due to
suggestions from referees and editors, previous section 2 moved to an
appendix, some references added, and the title was modified (vs changed to
vs.). This version matches the... | Universe 2022, 8(7), 349 | 10.3390/universe8070349 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review, as well as provide some new results regarding the study of the
structure of spacetime and the singularity in the interior of the Schwarzschild
black hole in both loop quantum gravity and generalized uncertainty principle
approaches, using congruences and their associated expansion scalar and the
Raychaudhu... | [
{
"created": "Sun, 8 May 2022 07:05:29 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jun 2022 19:29:00 GMT",
"version": "v2"
}
] | 2022-06-28 | [
[
"Rastgoo",
"Saeed",
""
],
[
"Das",
"Saurya",
""
]
] | We review, as well as provide some new results regarding the study of the structure of spacetime and the singularity in the interior of the Schwarzschild black hole in both loop quantum gravity and generalized uncertainty principle approaches, using congruences and their associated expansion scalar and the Raychaudhuri... |
2201.08280 | Xuantao Chen | Xuantao Chen | Global stability of Minkowski spacetime for a spin-1/2 field | 48 pages; typos corrected | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the initial value problem of the Einstein-Dirac system, and show the
stability of the Minkowski solution in the massless case with the use of
generalized wave coordinates. This requires the understanding of the Dirac
equation in curved spacetime, for which we establish various estimates. The
proof is based o... | [
{
"created": "Thu, 20 Jan 2022 16:31:27 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jan 2022 16:19:19 GMT",
"version": "v2"
},
{
"created": "Sat, 23 Apr 2022 21:12:52 GMT",
"version": "v3"
},
{
"created": "Sun, 7 Aug 2022 10:02:19 GMT",
"version": "v4"
},
{
"cr... | 2022-08-22 | [
[
"Chen",
"Xuantao",
""
]
] | We study the initial value problem of the Einstein-Dirac system, and show the stability of the Minkowski solution in the massless case with the use of generalized wave coordinates. This requires the understanding of the Dirac equation in curved spacetime, for which we establish various estimates. The proof is based on ... |
1503.07731 | Carlos Eduardo Cede\~no Monta\~na | C. E. Cede\~no M. and J. C. N. de Araujo | Point Particle Binary System with Components of Different Masses in the
Linear Regime of the Characteristic Formulation of General Relativity | 16 pages, 3 figures | Class. Quantum Grav. 33 (2016) 105010 | 10.1088/0264-9381/33/10/105010 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A study of binary systems composed of two point particles with different
masses in the linear regime of the characteristic formulation of general
relativity in a Minkowski background is provided. The present paper generalizes
a previous study find in the literature. The boundary conditions at the world
tubes generate... | [
{
"created": "Thu, 26 Mar 2015 13:35:25 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2015 12:25:43 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Apr 2016 20:31:48 GMT",
"version": "v3"
}
] | 2016-04-21 | [
[
"M.",
"C. E. Cedeño",
""
],
[
"de Araujo",
"J. C. N.",
""
]
] | A study of binary systems composed of two point particles with different masses in the linear regime of the characteristic formulation of general relativity in a Minkowski background is provided. The present paper generalizes a previous study find in the literature. The boundary conditions at the world tubes generated ... |
1504.04457 | Kazuharu Bamba | Kazuharu Bamba | Cosmological Issues in $F(T)$ Gravity Theory | 10 pages, no figure, contribution to International Conference on
Relativistic Astrophysics, February 10-14, 2015, University of the Punjab,
Lahore, Pakistan, references added | null | null | OCHA-PP-333, FU-PCG-1 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent developments on cosmology in extended teleparallel gravity,
called "$F(T)$ gravity" with $T$ the torsion scalar in teleparallelism. We
explore various cosmological aspects of $F(T)$ gravity including the evolution
of the equation of state for the universe, finite-time future singularities,
thermodyna... | [
{
"created": "Fri, 17 Apr 2015 08:00:48 GMT",
"version": "v1"
},
{
"created": "Sat, 2 May 2015 04:31:44 GMT",
"version": "v2"
}
] | 2015-05-05 | [
[
"Bamba",
"Kazuharu",
""
]
] | We review recent developments on cosmology in extended teleparallel gravity, called "$F(T)$ gravity" with $T$ the torsion scalar in teleparallelism. We explore various cosmological aspects of $F(T)$ gravity including the evolution of the equation of state for the universe, finite-time future singularities, thermodynami... |
2404.01161 | Saikat Chakraborty | Saikat Chakraborty, Peter K.S. Dunsby, Rituparno Goswami, Amare Abebe | A dynamical systems formulation for inhomogeneous LRS-II spacetimes | JCAP accepted version. Acknowledgement modified | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a dynamical system formulation for inhomogeneous LRS-II spacetimes
using the covariant 1+1+2 decomposition approach. Our approach describes the
LRS-II dynamics from the point of view of a comoving observer. Promoting the
covariant radial derivatives of the covariant dynamical quantities to new
dynamical va... | [
{
"created": "Mon, 1 Apr 2024 15:08:14 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jun 2024 05:12:29 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jun 2024 10:11:06 GMT",
"version": "v3"
}
] | 2024-06-21 | [
[
"Chakraborty",
"Saikat",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Abebe",
"Amare",
""
]
] | We present a dynamical system formulation for inhomogeneous LRS-II spacetimes using the covariant 1+1+2 decomposition approach. Our approach describes the LRS-II dynamics from the point of view of a comoving observer. Promoting the covariant radial derivatives of the covariant dynamical quantities to new dynamical vari... |
0906.3268 | Leonardo Fernandez-Jambrina | L. Fern\'andez-Jambrina | Non-regular Potentials and Sources for Static Axisymmetric Electrovacs | 5 pp., Proceedings of ERE'94 | Inhomogeneous Cosmological Models. Eds: A. Molina, J.M.M.
Senovilla. World Scientific, 213-7 (1995) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this lecture a new formalism for constructing electromagnetic surface
sources for static axisymmetric electrovacs is presented. The electrostatic and
magnetostatic sources are derived from the discontinuities of the scalar
potentials. This formalism allows the inclusion of two kinds of dipole sources:
Sheets of di... | [
{
"created": "Wed, 17 Jun 2009 18:17:58 GMT",
"version": "v1"
}
] | 2009-06-18 | [
[
"Fernández-Jambrina",
"L.",
""
]
] | In this lecture a new formalism for constructing electromagnetic surface sources for static axisymmetric electrovacs is presented. The electrostatic and magnetostatic sources are derived from the discontinuities of the scalar potentials. This formalism allows the inclusion of two kinds of dipole sources: Sheets of dipo... |
2012.05358 | Torsten Asselmeyer-Maluga | Torsten Asselmeyer-Maluga and Jerzy Krol | Dark Matter as gravitational solitons in the weak field limit | 11 pages, no figure, ReVTeX, This article belongs to the Special
Issue Geometric and Topological Models of Dark Matter and Dark Energy of the
journal universe | Universe 2020, 6(12), 234; https://www.mdpi.com/2218-1997/6/12/234 | 10.3390/universe6120234 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we will describe the idea that dark matter partly consists of
gravitational solitons (gravisolitons). The corresponding solution is valid for
weak gravitational fields (weak field limit) with respect to a background
metric. The stability of this soliton is connected with the existence of a
special foli... | [
{
"created": "Wed, 9 Dec 2020 23:01:38 GMT",
"version": "v1"
}
] | 2020-12-11 | [
[
"Asselmeyer-Maluga",
"Torsten",
""
],
[
"Krol",
"Jerzy",
""
]
] | In this paper, we will describe the idea that dark matter partly consists of gravitational solitons (gravisolitons). The corresponding solution is valid for weak gravitational fields (weak field limit) with respect to a background metric. The stability of this soliton is connected with the existence of a special foliat... |
1008.1395 | Miquel Pinyol Ribas | Miquel Pinyol Ribas, Ignacio Lopez Aylagas | Several Results in Black Hole Nonformation | 14 pages, 0 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black Hole Nonformation was suggested in 2006 by Vachaspati, Stojkovic and
Krauss as a sensible solution to the paradox of information, as deduced from
calculations in the semiclassical theory of Gravitation. Our own results in the
context of classical General Relativity (with the addition of several
thermodynamic ar... | [
{
"created": "Sun, 8 Aug 2010 09:46:07 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Aug 2010 08:57:44 GMT",
"version": "v2"
}
] | 2010-08-19 | [
[
"Ribas",
"Miquel Pinyol",
""
],
[
"Aylagas",
"Ignacio Lopez",
""
]
] | Black Hole Nonformation was suggested in 2006 by Vachaspati, Stojkovic and Krauss as a sensible solution to the paradox of information, as deduced from calculations in the semiclassical theory of Gravitation. Our own results in the context of classical General Relativity (with the addition of several thermodynamic argu... |
2109.02861 | Fu-Wen Shu | Yu-Chen Liu, Jia-Xi Feng, Fu-Wen Shu and Anzhong Wang | Extended geometry of Gambini-Olmedo-Pullin polymer black hole and its
quasinormal spectrum | 33 pages, 11 figures; Version matches the one published in PRD | Phys. Rev. D 104 (2021) 106001 | 10.1103/PhysRevD.104.106001 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we systematically study a model of spherically symmetric
polymer black holes recently proposed by Gambini, Olmedo, and Pullin (GOP).
Within the framework of loop quantum gravity, the quantum parameters in the GOP
model depend on the minimal area gap and the size of the discretization of the
physical sta... | [
{
"created": "Tue, 7 Sep 2021 04:32:28 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Oct 2021 06:27:17 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Nov 2021 05:45:27 GMT",
"version": "v3"
}
] | 2021-11-09 | [
[
"Liu",
"Yu-Chen",
""
],
[
"Feng",
"Jia-Xi",
""
],
[
"Shu",
"Fu-Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper we systematically study a model of spherically symmetric polymer black holes recently proposed by Gambini, Olmedo, and Pullin (GOP). Within the framework of loop quantum gravity, the quantum parameters in the GOP model depend on the minimal area gap and the size of the discretization of the physical state... |
1006.0674 | Puxun Wu | Puxun Wu and Hongwei Yu | Observational constraints on $f(T)$ theory | 15 pages, 5 figures; statefinder diagnostic added, Om(z) analysis
added; references added; accepted by PLB | Phys.Lett.B693:415-420,2010 | 10.1016/j.physletb.2010.08.073 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $f(T)$ theory, which is an extension of teleparallel, or torsion scalar
$T$, gravity, is recently proposed to explain the present cosmic accelerating
expansion with no need of dark energy. In this Letter, we first perform the
statefinder analysis and $Om(z)$ diagnostic to two concrete $f(T)$ models,
i.e., $f(T)=\... | [
{
"created": "Thu, 3 Jun 2010 15:13:47 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Jul 2010 03:01:28 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Aug 2010 16:58:50 GMT",
"version": "v3"
},
{
"created": "Sun, 29 Aug 2010 12:39:30 GMT",
"version": "v4"
},
{
"crea... | 2010-10-12 | [
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | The $f(T)$ theory, which is an extension of teleparallel, or torsion scalar $T$, gravity, is recently proposed to explain the present cosmic accelerating expansion with no need of dark energy. In this Letter, we first perform the statefinder analysis and $Om(z)$ diagnostic to two concrete $f(T)$ models, i.e., $f(T)=\al... |
1510.03905 | Joao Paulo Morais Graca | J. P. Morais Gra\c{c}a | Abelian cosmic string in the Starobinsky model of gravity | Published version | null | 10.1088/0264-9381/33/5/055004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, I analyze numerically the behaviour of the solutions
corresponding to an Abelian string in the framework of the Starobinsky model.
The role played by the quadratic term in the Lagrangian density $f(R) = R +
\eta R^2$ of this model is emphasized and the results are compared with the
corresponding ones o... | [
{
"created": "Tue, 13 Oct 2015 21:31:23 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Mar 2016 02:02:40 GMT",
"version": "v2"
}
] | 2016-03-02 | [
[
"Graça",
"J. P. Morais",
""
]
] | In this paper, I analyze numerically the behaviour of the solutions corresponding to an Abelian string in the framework of the Starobinsky model. The role played by the quadratic term in the Lagrangian density $f(R) = R + \eta R^2$ of this model is emphasized and the results are compared with the corresponding ones obt... |
1810.09677 | Swayamsidha Mishra | Swayamsidha Mishra, Sudipta Mukherji and Yogesh K. Srivastava | A note on Quantum Fields in Conformally flat Space-times | 11pages, Latex, No figure, Added a section about renormalized stress
tensor ; journal version | Modern Physics Letters A, Vol. 33, No. 1 (2019) 1950348 | 10.1142/S0217732319503486 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a technique relating scalar fields with different masses in
different conformally flat space-times. We apply this technique to the case of
FRW space-times, with $k=\pm 1,0$, and discuss several examples. We also study
various energy conditions and discuss how they constrain the space-times
related by this ... | [
{
"created": "Tue, 23 Oct 2018 06:22:46 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2019 16:09:19 GMT",
"version": "v2"
}
] | 2019-10-08 | [
[
"Mishra",
"Swayamsidha",
""
],
[
"Mukherji",
"Sudipta",
""
],
[
"Srivastava",
"Yogesh K.",
""
]
] | We develop a technique relating scalar fields with different masses in different conformally flat space-times. We apply this technique to the case of FRW space-times, with $k=\pm 1,0$, and discuss several examples. We also study various energy conditions and discuss how they constrain the space-times related by this te... |
1204.2506 | Diego Rubiera-Garcia | J. Diaz-Alonso and D. Rubiera-Garcia | Thermodynamic analysis of black hole solutions in gravitating nonlinear
electrodynamics | 51 single column pages, 19 postscript figures, 2 tables, GRG tex
style; minor corrections added; final version appearing in General Relativity
and Gravitation | Gen. Rel. Grav. 45 (2013) 1901-1950 | 10.1007/s10714-013-1567-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a general study of the thermodynamic properties of static
electrically charged black hole solutions of nonlinear electrodynamics
minimally coupled to gravitation in three space dimensions. The Lagrangian
densities governing the dynamics of these models in flat space are defined as
arbitrary functions of th... | [
{
"created": "Wed, 11 Apr 2012 17:43:00 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2013 11:01:09 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Mar 2013 14:24:40 GMT",
"version": "v3"
},
{
"created": "Sat, 28 Sep 2013 11:50:01 GMT",
"version": "v4"
}
] | 2013-10-01 | [
[
"Diaz-Alonso",
"J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We perform a general study of the thermodynamic properties of static electrically charged black hole solutions of nonlinear electrodynamics minimally coupled to gravitation in three space dimensions. The Lagrangian densities governing the dynamics of these models in flat space are defined as arbitrary functions of the ... |
1111.4192 | Ernesto F. Eiroa | Ernesto F. Eiroa, Claudio Simeone | Thin shells in Einstein-Born-Infeld theory | 4 pages, 2 figures; prepared for the proceedings of ERE2011 | AIP Conf.Proc.1458:383-386, 2012 | 10.1063/1.4734440 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The characterization and mechanical stability of charged thin shells with
spherical symmetry are analyzed in the context of Einstein-Born-Infeld theory.
The study of stability is performed by considering linearized perturbations
preserving the symmetry of the static configurations. It is found that as the
charge incr... | [
{
"created": "Thu, 17 Nov 2011 19:54:21 GMT",
"version": "v1"
}
] | 2012-07-10 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Simeone",
"Claudio",
""
]
] | The characterization and mechanical stability of charged thin shells with spherical symmetry are analyzed in the context of Einstein-Born-Infeld theory. The study of stability is performed by considering linearized perturbations preserving the symmetry of the static configurations. It is found that as the charge increa... |
gr-qc/0602091 | Norbert Van den Bergh | Norbert Van den Bergh and Lode Wylleman | An exhaustive classification of aligned Petrov type D purely magnetic
perfect fluids | 7 pages typos corrected and references added | Class.Quant.Grav. 23 (2006) 3353-3360 | 10.1088/0264-9381/23/10/007 | null | gr-qc | null | We prove that aligned Petrov type D purely magnetic perfect fluids are
necessarily locally rotationally symmetric and hence are all explicitly known.
| [
{
"created": "Wed, 22 Feb 2006 20:40:19 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2006 09:24:05 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Bergh",
"Norbert Van den",
""
],
[
"Wylleman",
"Lode",
""
]
] | We prove that aligned Petrov type D purely magnetic perfect fluids are necessarily locally rotationally symmetric and hence are all explicitly known. |
1207.2431 | Thomas W. Baumgarte | Kenneth A. Dennison and Thomas W. Baumgarte | Analytical Tendex and Vortex Fields for Perturbative Black Hole Initial
Data | 18 pages, 8 figures, submitted to PRD | null | 10.1103/PhysRevD.86.084051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tendex and vortex fields, defined by the eigenvectors and eigenvalues of the
electric and magnetic parts of the Weyl curvature tensor, form the basis of a
recently developed approach to visualizing spacetime curvature. In particular,
this method has been proposed as a tool for interpreting results from numerical
bina... | [
{
"created": "Tue, 10 Jul 2012 18:06:03 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Dennison",
"Kenneth A.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | Tendex and vortex fields, defined by the eigenvectors and eigenvalues of the electric and magnetic parts of the Weyl curvature tensor, form the basis of a recently developed approach to visualizing spacetime curvature. In particular, this method has been proposed as a tool for interpreting results from numerical binary... |
1212.1235 | Sean McWilliams | Sean T. McWilliams | Black Holes are neither Particle Accelerators nor Dark Matter Probes | 5 pages, 3 figures, accepted to Phys. Rev. Lett | null | 10.1103/PhysRevLett.110.011102 | null | gr-qc astro-ph.HE math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been suggested that maximally spinning black holes can serve as
particle accelerators, reaching arbitrarily high center-of-mass energies.
Despite several objections regarding the practical achievability of such high
energies, and demonstrations past and present that such large energies could
never reach a dist... | [
{
"created": "Thu, 6 Dec 2012 04:51:01 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"McWilliams",
"Sean T.",
""
]
] | It has been suggested that maximally spinning black holes can serve as particle accelerators, reaching arbitrarily high center-of-mass energies. Despite several objections regarding the practical achievability of such high energies, and demonstrations past and present that such large energies could never reach a distan... |
gr-qc/0507024 | Plyatsko Roman | Roman Plyatsko | Gravitational ultrarelativistic spin-orbit interaction and the weak
equivalence principle | 12 pages | Phys.Rev. D58 (1998) 084031 | 10.1103/PhysRevD.58.084031 | null | gr-qc | null | It is shown that the gravitational ultrarelativistic spin-orbit interaction
violates the weak equivalence principle in the traditional sense. This fact is
a direct consequence of the Mathisson-Papapetrou equations in the frame of
reference comoving with a spinning test particle. The widely held assumption
that the de... | [
{
"created": "Thu, 7 Jul 2005 09:13:31 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Plyatsko",
"Roman",
""
]
] | It is shown that the gravitational ultrarelativistic spin-orbit interaction violates the weak equivalence principle in the traditional sense. This fact is a direct consequence of the Mathisson-Papapetrou equations in the frame of reference comoving with a spinning test particle. The widely held assumption that the devi... |
2310.19729 | Robert Seeger | Hanno Sahlmann and Robert Seeger | Revisiting loop quantum gravity with selfdual variables: Classical
theory | 40 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the classical formulation of general relativity as an SL(2,C) gauge
theory in terms of Ashtekar's selfdual variables and reality conditions for the
spatial metric (RCI) and its evolution (RCII), and we add some new observations
and results. We first explain in detail how a connection taking values in the
Li... | [
{
"created": "Mon, 30 Oct 2023 16:53:26 GMT",
"version": "v1"
}
] | 2023-10-31 | [
[
"Sahlmann",
"Hanno",
""
],
[
"Seeger",
"Robert",
""
]
] | We review the classical formulation of general relativity as an SL(2,C) gauge theory in terms of Ashtekar's selfdual variables and reality conditions for the spatial metric (RCI) and its evolution (RCII), and we add some new observations and results. We first explain in detail how a connection taking values in the Lie ... |
2306.04068 | Nathan Johnson-McDaniel | Purnima Narayan, Nathan K. Johnson-McDaniel, Anuradha Gupta | Effect of Ignoring Eccentricity in Testing General Relativity with
Gravitational Waves | 16 pages, 6 figures, version accepted by PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detections of gravitational waves emitted from binary black hole coalescences
allow us to probe the strong-field dynamics of general relativity (GR). One can
compare the observed gravitational-wave signals with theoretical waveform
models to constrain possible deviations from GR. Any physics that is not
included in t... | [
{
"created": "Tue, 6 Jun 2023 23:56:45 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Aug 2023 15:05:05 GMT",
"version": "v2"
}
] | 2023-08-30 | [
[
"Narayan",
"Purnima",
""
],
[
"Johnson-McDaniel",
"Nathan K.",
""
],
[
"Gupta",
"Anuradha",
""
]
] | Detections of gravitational waves emitted from binary black hole coalescences allow us to probe the strong-field dynamics of general relativity (GR). One can compare the observed gravitational-wave signals with theoretical waveform models to constrain possible deviations from GR. Any physics that is not included in the... |
gr-qc/0403077 | Alessandro Nagar | Alessandro Nagar, Guillermo Diaz, Jose A. Pons, Jose A. Font | Accretion-driven gravitational radiation from nonrotating compact
objects. Infalling quadrupolar shells | 23 pages, 12 figures, v3. Replaced fig.6. Small changes in the text
to match the version published in Phys. Rev. D | Phys.Rev. D69 (2004) 124028 | 10.1103/PhysRevD.69.124028 | null | gr-qc | null | This paper reports results from numerical simulations of the gravitational
radiation emitted from non--rotating compact objects(both neutron stars and
Schwarzschild black holes) as a result of the accretion of matter. A hybrid
procedure is adopted: we evolve, in axisymmetry, the linearized equations
describing metric... | [
{
"created": "Wed, 17 Mar 2004 10:39:15 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Apr 2004 19:41:32 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Jun 2004 09:23:13 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Nagar",
"Alessandro",
""
],
[
"Diaz",
"Guillermo",
""
],
[
"Pons",
"Jose A.",
""
],
[
"Font",
"Jose A.",
""
]
] | This paper reports results from numerical simulations of the gravitational radiation emitted from non--rotating compact objects(both neutron stars and Schwarzschild black holes) as a result of the accretion of matter. A hybrid procedure is adopted: we evolve, in axisymmetry, the linearized equations describing metric a... |
1211.5053 | Mario Novello | M. Novello and E. Bittencourt | Gordon Metric Revisited | Accepted for Physical Review D | null | 10.1103/PhysRevD.86.124024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Gordon metric belongs to a larger class of geometries, which are
responsible to describe the paths of accelerated bodies in moving dielectrics
as geodesics in a metric $\hat q_{\mu\nu}$ different from the background one.
This map depends only on the background metric and on the motion of the bodies
under... | [
{
"created": "Wed, 21 Nov 2012 15:08:01 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Novello",
"M.",
""
],
[
"Bittencourt",
"E.",
""
]
] | We show that Gordon metric belongs to a larger class of geometries, which are responsible to describe the paths of accelerated bodies in moving dielectrics as geodesics in a metric $\hat q_{\mu\nu}$ different from the background one. This map depends only on the background metric and on the motion of the bodies under c... |
2312.14118 | Collin Capano | Alex Correia and Yi-Fan Wang and Julian Westerweck and Collin D.
Capano | Low evidence for ringdown overtone in GW150914 when marginalizing over
time and sky location uncertainty | 6 pages, 4 figures. Data available at
https://zenodo.org/records/10493247 | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tests of the no-hair theorem using astrophysical black holes involve the
detection of at least two quasi-normal modes (QNMs) in the gravitational wave
emitted by a perturbed black hole. A detection of two modes -- the dominant,
$(\ell, m, n) = (2,2,0)$, mode and its first overtone, the $(2,2,1)$ mode -- in
the post-m... | [
{
"created": "Thu, 21 Dec 2023 18:41:48 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2024 21:08:55 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Jul 2024 20:43:31 GMT",
"version": "v3"
}
] | 2024-07-18 | [
[
"Correia",
"Alex",
""
],
[
"Wang",
"Yi-Fan",
""
],
[
"Westerweck",
"Julian",
""
],
[
"Capano",
"Collin D.",
""
]
] | Tests of the no-hair theorem using astrophysical black holes involve the detection of at least two quasi-normal modes (QNMs) in the gravitational wave emitted by a perturbed black hole. A detection of two modes -- the dominant, $(\ell, m, n) = (2,2,0)$, mode and its first overtone, the $(2,2,1)$ mode -- in the post-mer... |
2103.08080 | Qing-Guo Huang | Yu-Mei Wu and Qing-Guo Huang | Parameterized second post-Newtonian framework with conservation Laws | 17 pages | Phys. Rev. D 104, 064050 (2021) | 10.1103/PhysRevD.104.064050 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We parameterize the second post-Newtonian (2PN) metric for a gravitating
system of fluids in the generalized harmonic gauge, and find that there are
only three independent 2PN parameters (i.e. $\omega$, $\delta$ and $\delta_2$)
for satisfying some conservation laws including the conservations of energy,
momentum, ang... | [
{
"created": "Mon, 15 Mar 2021 00:50:28 GMT",
"version": "v1"
}
] | 2021-09-29 | [
[
"Wu",
"Yu-Mei",
""
],
[
"Huang",
"Qing-Guo",
""
]
] | We parameterize the second post-Newtonian (2PN) metric for a gravitating system of fluids in the generalized harmonic gauge, and find that there are only three independent 2PN parameters (i.e. $\omega$, $\delta$ and $\delta_2$) for satisfying some conservation laws including the conservations of energy, momentum, angul... |
2202.05310 | Gabriele Bozzola | Gabriele Bozzola | Does charge matter in high-energy collisions of black holes? | 7 pages, 7 figures | Phys. Rev. Lett. 128, 071101, 2022 | 10.1103/PhysRevLett.128.071101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform numerical-relativity simulations of high-energy head-on collisions
of charged black holes with the same charge-to-mass ratio $\lambda$. We find
that electromagnetic interactions have subdominant effects already at low
Lorentz factors $\gamma$, supporting the conjecture that the details of the
properties of... | [
{
"created": "Thu, 10 Feb 2022 20:26:08 GMT",
"version": "v1"
}
] | 2022-02-14 | [
[
"Bozzola",
"Gabriele",
""
]
] | We perform numerical-relativity simulations of high-energy head-on collisions of charged black holes with the same charge-to-mass ratio $\lambda$. We find that electromagnetic interactions have subdominant effects already at low Lorentz factors $\gamma$, supporting the conjecture that the details of the properties of b... |
1312.1316 | Peter Van | T.S. Bir\'o and P. V\'an | Splitting the source term for the Einstein equation to classical and
quantum parts | 13 pages, revised | Foundations of Physics, 2015, 45, 1465-1482 | 10.1007/s10701-015-9920-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the special and general relativistic extensions of the action
principle behind the Schr\"odinger equation distinguishing classical and
quantum contributions. Postulating a particular quantum correction to the
source term in the classical Einstein equation we identify the conformal
content of the above act... | [
{
"created": "Wed, 4 Dec 2013 20:28:23 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Apr 2015 21:04:37 GMT",
"version": "v2"
},
{
"created": "Mon, 4 May 2015 08:26:50 GMT",
"version": "v3"
}
] | 2016-05-20 | [
[
"Biró",
"T. S.",
""
],
[
"Ván",
"P.",
""
]
] | We consider the special and general relativistic extensions of the action principle behind the Schr\"odinger equation distinguishing classical and quantum contributions. Postulating a particular quantum correction to the source term in the classical Einstein equation we identify the conformal content of the above actio... |
2010.07300 | Horng Sheng Chia | Horng Sheng Chia | Tidal Deformation and Dissipation of Rotating Black Holes | 6+1 pages, 1 figure; updated to match published version | Phys. Rev. D 104, 024013 (2021) | 10.1103/PhysRevD.104.024013 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that rotating black holes do not experience any tidal deformation
when they are perturbed by a weak and adiabatic gravitational field. The tidal
deformability of an object is quantified by the so-called "Love numbers", which
describe the object's linear response to its external tidal field. In this
work, we c... | [
{
"created": "Wed, 14 Oct 2020 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jul 2021 19:14:14 GMT",
"version": "v2"
}
] | 2021-07-14 | [
[
"Chia",
"Horng Sheng",
""
]
] | We show that rotating black holes do not experience any tidal deformation when they are perturbed by a weak and adiabatic gravitational field. The tidal deformability of an object is quantified by the so-called "Love numbers", which describe the object's linear response to its external tidal field. In this work, we com... |
1911.06474 | Gihyuk Cho | Gihyuk Cho | A Review on post-Newtonian theory | This paper contains wrong information | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note is a brief review note on Blachet-Damour-Iyer approach of
post-Newtonian theory. This note keeps being modified.
| [
{
"created": "Fri, 15 Nov 2019 04:25:13 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Nov 2021 12:24:15 GMT",
"version": "v2"
}
] | 2021-11-09 | [
[
"Cho",
"Gihyuk",
""
]
] | This note is a brief review note on Blachet-Damour-Iyer approach of post-Newtonian theory. This note keeps being modified. |
1910.01188 | Selman Ipek | Selman Ipek, Ariel Caticha | An Entropic Dynamics Approach to Geometrodynamics | First presented at the 39th International Workshop on Bayesian
Inference and Maximum Entropy Methods in Science and Engineering | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Entropic Dynamics (ED) framework quantum theory is derived as an
application of entropic methods of inference. The physics is introduced through
appropriate choices of variables and of constraints that codify the relevant
physical information. In previous work, a manifestly covariant ED of quantum
scalar field... | [
{
"created": "Wed, 2 Oct 2019 19:49:39 GMT",
"version": "v1"
}
] | 2019-10-04 | [
[
"Ipek",
"Selman",
""
],
[
"Caticha",
"Ariel",
""
]
] | In the Entropic Dynamics (ED) framework quantum theory is derived as an application of entropic methods of inference. The physics is introduced through appropriate choices of variables and of constraints that codify the relevant physical information. In previous work, a manifestly covariant ED of quantum scalar fields ... |
gr-qc/9308023 | Stephen Parrott | Stephen Parrott | Energy Radiation of Charged Particles in Conformally Flat Spacetimes | 21 pages, LaTeX, 3 figures, also LaTeX. The body of the paper,
originally posted in 1993, is unchanged. A 6-page appendix was added in 2000.
It discusses implications to the original arguments of subsequent work of
Sonego (J. Math. Phys. 40(1999), 3381-3394, and of Quinn and Wald (Phys. Rev.
D 60(1999). This la... | null | null | null | gr-qc | null | Original abstract: Consider the worldline of a charged particle in a static
spacetime. Contraction of the time-translation Killing field with the retarded
electromagnetic energy-momentum tensor gives a conserved electromagnetic energy
vector which can be used to define the radiated electromagnetic energy. This
note p... | [
{
"created": "Sun, 22 Aug 1993 07:47:22 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jul 2000 21:24:34 GMT",
"version": "v2"
},
{
"created": "Sun, 20 Apr 2003 23:05:53 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Parrott",
"Stephen",
""
]
] | Original abstract: Consider the worldline of a charged particle in a static spacetime. Contraction of the time-translation Killing field with the retarded electromagnetic energy-momentum tensor gives a conserved electromagnetic energy vector which can be used to define the radiated electromagnetic energy. This note poi... |
gr-qc/0604108 | Victor Varela | Victor Varela | Neutral perfect fluids and charged thin shells with electromagnetic mass
in general relativity | 8 pages | Gen.Rel.Grav.39:267-275,2007 | 10.1007/s10714-006-0383-1 | null | gr-qc | null | We build extended sources for the Reissner-Nordstr\"{o}m metric. Our models
describe a neutral perfect fluid core bounded by a charged thin shell, and
feature everywhere positive rest mass density and everywhere non-negative
active gravitational mass, as well as classical electron radius and
electromagnetic total mas... | [
{
"created": "Tue, 25 Apr 2006 19:52:35 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Varela",
"Victor",
""
]
] | We build extended sources for the Reissner-Nordstr\"{o}m metric. Our models describe a neutral perfect fluid core bounded by a charged thin shell, and feature everywhere positive rest mass density and everywhere non-negative active gravitational mass, as well as classical electron radius and electromagnetic total mass.... |
1512.08449 | Saheb Soroushfar | Saheb Soroushfar, Reza Saffari, Afsaneh Jafari | A study of geodesic motion in a (2+1)-dimensional charged BTZ black hole | 18 pages, 14 figures,Accepted for publication in Physical Review D | Phys. Rev. D 93, 104037 (2016) | 10.1103/PhysRevD.93.104037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study is purposed to derive the equation of motion for geodesics in
vicinity of spacetime of a (2 + 1)-dimensional charged BTZ black hole. In this
paper, we solve geodesics for both massive and massless particles in terms of
Weierstrass elliptic and Kleinian sigma hyper-elliptic functions. Then we
determine diff... | [
{
"created": "Mon, 28 Dec 2015 16:33:18 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2015 21:43:31 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Apr 2016 17:50:51 GMT",
"version": "v3"
}
] | 2016-06-01 | [
[
"Soroushfar",
"Saheb",
""
],
[
"Saffari",
"Reza",
""
],
[
"Jafari",
"Afsaneh",
""
]
] | This study is purposed to derive the equation of motion for geodesics in vicinity of spacetime of a (2 + 1)-dimensional charged BTZ black hole. In this paper, we solve geodesics for both massive and massless particles in terms of Weierstrass elliptic and Kleinian sigma hyper-elliptic functions. Then we determine differ... |
1604.01394 | Sergey Chervon | Aleksei Nikolaev and Sergey Chervon | The effect of universe inhomogeneities on cosmological distance
measurements | 4 pages | null | 10.1134/S0202289316020122 | LGCA-2016/4 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the focusing equation, the equation for the cosmological angular
diameter distance is derived, based on the ideas of Academician Ya.B.
Zel'dovich, namely, that the distribution of matter at small angles is not
homogeneous, and the light cone is close to being empty. We propose some ways
of testing a method for ... | [
{
"created": "Tue, 5 Apr 2016 10:59:36 GMT",
"version": "v1"
}
] | 2016-06-22 | [
[
"Nikolaev",
"Aleksei",
""
],
[
"Chervon",
"Sergey",
""
]
] | Using the focusing equation, the equation for the cosmological angular diameter distance is derived, based on the ideas of Academician Ya.B. Zel'dovich, namely, that the distribution of matter at small angles is not homogeneous, and the light cone is close to being empty. We propose some ways of testing a method for me... |
0809.4314 | Mubasher Jamil | Mubasher Jamil, Farook Rahaman, Mehedi Kalam | Cosmic coincidence problem and variable constants of physics | 27 pages, 15 figures | Eur.Phys.J.C60:149-156,2009 | 10.1140/epjc/s10052-009-0865-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard model of cosmology is investigated using time dependent
cosmological constant $\Lambda$ and Newton's gravitational constant $G$. The
total energy content is described by the modified Chaplygin gas equation of
state. It is found that the time dependent constants coupled with the modified
Chaplygin gas int... | [
{
"created": "Thu, 25 Sep 2008 03:21:07 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Dec 2008 16:01:59 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Feb 2009 05:55:27 GMT",
"version": "v3"
}
] | 2009-03-12 | [
[
"Jamil",
"Mubasher",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Kalam",
"Mehedi",
""
]
] | The standard model of cosmology is investigated using time dependent cosmological constant $\Lambda$ and Newton's gravitational constant $G$. The total energy content is described by the modified Chaplygin gas equation of state. It is found that the time dependent constants coupled with the modified Chaplygin gas inter... |
gr-qc/0610126 | Chris Van Den Broeck | Chris Van Den Broeck, Anand S. Sengupta | Binary black hole spectroscopy | 28 pages, many figures. Final version accepted by CQG. More in-depth
treatment of component mass errors and detectability of Kerr bound
violations; improved presentation | Class.Quant.Grav.24:1089-1114,2007 | 10.1088/0264-9381/24/5/005 | null | gr-qc astro-ph | null | We study parameter estimation with post-Newtonian (PN) gravitational
waveforms for the quasi-circular, adiabatic inspiral of spinning binary compact
objects. The performance of amplitude-corrected waveforms is compared with that
of the more commonly used restricted waveforms, in Advanced LIGO and EGO. With
restricted... | [
{
"created": "Thu, 26 Oct 2006 16:01:13 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2007 17:18:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Broeck",
"Chris Van Den",
""
],
[
"Sengupta",
"Anand S.",
""
]
] | We study parameter estimation with post-Newtonian (PN) gravitational waveforms for the quasi-circular, adiabatic inspiral of spinning binary compact objects. The performance of amplitude-corrected waveforms is compared with that of the more commonly used restricted waveforms, in Advanced LIGO and EGO. With restricted w... |
gr-qc/0104023 | Etesi Gabor | Gabor Etesi (Yukawa Institute, Japan), Istvan Nemeti (Renyi Institute,
Hungary) | Non-Turing computations via Malament-Hogarth space-times | Final, published version: 25 pages, LaTex with two eps-figures,
journal reference added | Int.J.Theor.Phys. 41 (2002) 341-370 | null | null | gr-qc | null | We investigate the Church-Kalm\'ar-Kreisel-Turing Theses concerning
theoretical (necessary) limitations of future computers and of deductive
sciences, in view of recent results of classical general relativity theory.
We argue that (i) there are several distinguished Church-Turing-type Theses
(not only one) and (ii)... | [
{
"created": "Mon, 9 Apr 2001 03:52:59 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2002 12:12:52 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Etesi",
"Gabor",
"",
"Yukawa Institute, Japan"
],
[
"Nemeti",
"Istvan",
"",
"Renyi Institute,\n Hungary"
]
] | We investigate the Church-Kalm\'ar-Kreisel-Turing Theses concerning theoretical (necessary) limitations of future computers and of deductive sciences, in view of recent results of classical general relativity theory. We argue that (i) there are several distinguished Church-Turing-type Theses (not only one) and (ii) val... |
2211.13736 | Louis Hamaide | Louis Hamaide and Theo Torres | Black hole information recovery from gravitational waves | 26 pages, 4 figures, 1 table, 1 appendix, Class. Quantum Grav (2023) | null | 10.1088/1361-6382/acc511 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We study the classical and quantum black hole information in gravitational
waves from a black hole's history. We review the necessary concepts regarding
quantum information in many-body systems to motivate information retrieval and
content in gravitational waves. We then show the first step in an optimal
information ... | [
{
"created": "Thu, 24 Nov 2022 17:53:16 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Mar 2023 13:43:28 GMT",
"version": "v2"
}
] | 2023-03-21 | [
[
"Hamaide",
"Louis",
""
],
[
"Torres",
"Theo",
""
]
] | We study the classical and quantum black hole information in gravitational waves from a black hole's history. We review the necessary concepts regarding quantum information in many-body systems to motivate information retrieval and content in gravitational waves. We then show the first step in an optimal information re... |
2309.05336 | Alan Barnes | Alan Barnes | Vacuum Static Spherically Symmetric Spacetimes in Harada's Theory | LaTex 8 pages, no figures Several typos corrected in equation(16) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Very recently Harada proposed a gravitational theory which is of third order
in the derivatives of the metric tensor with the property that any solution of
Einstein's field equations (EFEs) possibly with a cosmological constant is
necessarily a solution of the new theory. He then applied his theory to derive
a second... | [
{
"created": "Mon, 11 Sep 2023 09:34:13 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Nov 2023 19:38:55 GMT",
"version": "v2"
}
] | 2023-11-15 | [
[
"Barnes",
"Alan",
""
]
] | Very recently Harada proposed a gravitational theory which is of third order in the derivatives of the metric tensor with the property that any solution of Einstein's field equations (EFEs) possibly with a cosmological constant is necessarily a solution of the new theory. He then applied his theory to derive a second-o... |
2308.05712 | Dhruba Jyoti Gogoi Dr. | Surajit Mandal, Surajit Das, Dhruba Jyoti Gogoi and Ananda Pramanik | Leading-order corrections to the thermodynamics of Rindler modified
Schwarzschild black hole | 28 pages, 10 figures, Physics of the Dark Universe accepted version | Physics of the Dark Universe 42, 101349 (2023) | 10.1016/j.dark.2023.101349 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we present a thermodynamical study of a Rindler modified
Schwarzschild black hole under the consideration of small thermal fluctuations.
In particular, we compute various stable macroscopic thermodynamic variables
such as Hawking temperature, entropy, Helmholtz free energy, internal energy,
enthalpy, an... | [
{
"created": "Thu, 10 Aug 2023 17:20:57 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2023 12:38:49 GMT",
"version": "v2"
}
] | 2024-03-11 | [
[
"Mandal",
"Surajit",
""
],
[
"Das",
"Surajit",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Pramanik",
"Ananda",
""
]
] | In this work, we present a thermodynamical study of a Rindler modified Schwarzschild black hole under the consideration of small thermal fluctuations. In particular, we compute various stable macroscopic thermodynamic variables such as Hawking temperature, entropy, Helmholtz free energy, internal energy, enthalpy, and ... |
1605.04080 | Ahmed Bouda | T. Foughali and A. Bouda | Dirac's Equation in $R$-Minkowski Spacetime | 13 pages, no figures | Int. J. Theo. Phys. 55 (2016) 2247 | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We recently constructed the $R$-Poincar\'e algebra from an appropriate
deformed Poisson brackets which reproduce the Fock coordinate transformation.
We showed then that the spacetime of this transformation is the de Sitter one.
In this paper, we derive in the $R$-Minkowski spacetime the Dirac equation and
show that t... | [
{
"created": "Fri, 13 May 2016 08:19:37 GMT",
"version": "v1"
}
] | 2016-05-16 | [
[
"Foughali",
"T.",
""
],
[
"Bouda",
"A.",
""
]
] | We recently constructed the $R$-Poincar\'e algebra from an appropriate deformed Poisson brackets which reproduce the Fock coordinate transformation. We showed then that the spacetime of this transformation is the de Sitter one. In this paper, we derive in the $R$-Minkowski spacetime the Dirac equation and show that thi... |
gr-qc/0512003 | Lorenzo Iorio | Lorenzo Iorio | On the use of Ajisai and Jason-1 satellites for tests of General
Relativity | Latex, 24 pages, 5 tables, 1 figure. Two references added, minor
modifications. To appear in New Astronomy | New Astron. 12 (2006) 224-233 | 10.1016/j.newast.2006.09.005 | null | gr-qc astro-ph physics.geo-ph | null | Here we analyze in detail some aspects of the proposed use of Ajisai and
Jason-1, together with the LAGEOS satellites, to measure the general
relativistic Lense-Thirring effect in the gravitational field of the Earth. A
linear combination of the nodes of such satellites is the proposed observable.
The systematic erro... | [
{
"created": "Wed, 30 Nov 2005 23:26:17 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Dec 2005 12:26:00 GMT",
"version": "v2"
},
{
"created": "Mon, 29 May 2006 08:24:25 GMT",
"version": "v3"
},
{
"created": "Wed, 20 Sep 2006 10:13:46 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
]
] | Here we analyze in detail some aspects of the proposed use of Ajisai and Jason-1, together with the LAGEOS satellites, to measure the general relativistic Lense-Thirring effect in the gravitational field of the Earth. A linear combination of the nodes of such satellites is the proposed observable. The systematic error ... |
gr-qc/9909031 | Jeeva S. Anandan | Jeeva S. Anandan | Remarks on Cosmic Strings and Quantum Gravity | 14 pages, Tex. Submitted in 1994 for publication in the proceedings
of the Conference on Bose and 20th Century Physics, Calcutta, Jan. 1994,
edited by Partha Ghose (Kluwer) | null | null | null | gr-qc | null | A quantum equivalence principle is formulated by means of a gravitational
phase operator which is an element of the Poincare group. This is applied to
the spinning cosmic string which suggests that it may, but not necessarily,
contain gravitational torsion. A new exact solution of the Einstein-
Cartan-Sciama-Kibble e... | [
{
"created": "Thu, 9 Sep 1999 13:28:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anandan",
"Jeeva S.",
""
]
] | A quantum equivalence principle is formulated by means of a gravitational phase operator which is an element of the Poincare group. This is applied to the spinning cosmic string which suggests that it may, but not necessarily, contain gravitational torsion. A new exact solution of the Einstein- Cartan-Sciama-Kibble equ... |
2006.15633 | Xian Gao | Xian Gao | Higher derivative scalar-tensor theory from the spatially covariant
gravity: a linear algebraic analysis | 20 pages, 1 figure | null | 10.1088/1475-7516/2020/11/004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the ghostfree scalar-tensor theory with a timelike scalar
field, with derivatives of the scalar field up to the third order and with the
Riemann tensor up to the quadratic order. We build two types of linear spaces.
One is the set of linearly independent generally covariant scalar-tensor
monomials, the... | [
{
"created": "Sun, 28 Jun 2020 15:19:38 GMT",
"version": "v1"
}
] | 2020-11-11 | [
[
"Gao",
"Xian",
""
]
] | We investigate the ghostfree scalar-tensor theory with a timelike scalar field, with derivatives of the scalar field up to the third order and with the Riemann tensor up to the quadratic order. We build two types of linear spaces. One is the set of linearly independent generally covariant scalar-tensor monomials, the o... |
1304.7439 | Sang Pyo Kim | Sang Pyo Kim (Kunsan Nat'l Univ.) | Massive Scalar Field Quantum Cosmology | RevTex 6 pages; invited paper to "The Universe" | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the third quantized formulation of the massive inflaton quantum
cosmology for the Friedmann-Robertson-Walker universe. The Hamiltonian is
equivalent to an infinite number of coupled oscillators whose couplings and
frequencies are intrinsic time-dependent. We propose the invariant operators
whose eigenstates ... | [
{
"created": "Sun, 28 Apr 2013 08:01:29 GMT",
"version": "v1"
}
] | 2013-04-30 | [
[
"Kim",
"Sang Pyo",
"",
"Kunsan Nat'l Univ."
]
] | We study the third quantized formulation of the massive inflaton quantum cosmology for the Friedmann-Robertson-Walker universe. The Hamiltonian is equivalent to an infinite number of coupled oscillators whose couplings and frequencies are intrinsic time-dependent. We propose the invariant operators whose eigenstates pr... |
gr-qc/9910046 | Maria Cristina Neacsu | Maria C. Neacsu | The magnetic field of the relativistic stars in the 5D approach | MCP International Conference, Florida, USA, 1999 | Analele Univ.Timisoara (Stiinte Fiz.) 39:75-82,1999 | null | null | gr-qc | null | It is well-known that the 5D equations without sources may be reduced to the
4D ones with sources, provided an appropriate definition for the
energy-momentum tensor of matter in terms of the extra part of the geometry.The
advantage consists on the naturally appearance of gravitational and
electromagnetic fields from ... | [
{
"created": "Wed, 13 Oct 1999 14:30:48 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Oct 1999 14:31:45 GMT",
"version": "v2"
}
] | 2011-04-15 | [
[
"Neacsu",
"Maria C.",
""
]
] | It is well-known that the 5D equations without sources may be reduced to the 4D ones with sources, provided an appropriate definition for the energy-momentum tensor of matter in terms of the extra part of the geometry.The advantage consists on the naturally appearance of gravitational and electromagnetic fields from th... |
gr-qc/0207046 | Carl E. Dolby | Carl E. Dolby and Stephen F. Gull | Radar Time and a State-Space Based Approach To Quantum Field Theory In
Gravitational and Electromagnetic Backgrounds | 45 pages, 11 figures. Submitted to Ann. Phys | null | null | null | gr-qc hep-th | null | In a recent paper (hep-th/0103228) a new initial value formulation of
fermionic QFT was presented that is applicable to an arbitrary observer in any
electromagnetic background. This approach suggests a consistent particle
interpretation at all times, with the concept of `radar time' used to
generalise this interpreta... | [
{
"created": "Thu, 11 Jul 2002 15:10:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dolby",
"Carl E.",
""
],
[
"Gull",
"Stephen F.",
""
]
] | In a recent paper (hep-th/0103228) a new initial value formulation of fermionic QFT was presented that is applicable to an arbitrary observer in any electromagnetic background. This approach suggests a consistent particle interpretation at all times, with the concept of `radar time' used to generalise this interpretati... |
2110.14689 | Alice Garoffolo | Alice Garoffolo and Omar Contigiani | Unifying gravitational waves and dark energy | 6 pages, comments are welcome | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We present a unifying treatment for metric and scalar perturbations across
different energy regimes in scalar-tensor theories of gravity. To do so, we
introduce two connected symmetry-breaking patterns: one due to the acquisition
of nontrivial vacuum expectation values by the fields and the other due to the
distincti... | [
{
"created": "Wed, 27 Oct 2021 18:16:13 GMT",
"version": "v1"
}
] | 2021-10-29 | [
[
"Garoffolo",
"Alice",
""
],
[
"Contigiani",
"Omar",
""
]
] | We present a unifying treatment for metric and scalar perturbations across different energy regimes in scalar-tensor theories of gravity. To do so, we introduce two connected symmetry-breaking patterns: one due to the acquisition of nontrivial vacuum expectation values by the fields and the other due to the distinction... |
gr-qc/0009090 | Tekin Dereli | T. Dereli, O. Sarioglu (METU, Ankara) | "Self-dual" solutions of topologically massive gravity coupled with the
Maxwell-Chern-Simons theory | 6 pages REVTEX file, no figures. To appear in Phys. Lett. B | Phys.Lett. B492 (2000) 339-343 | 10.1016/S0370-2693(00)01098-4 | null | gr-qc | null | We give a general class of exact solutions to the (1+2)-dimensional
topologically massive gravity model coupled with Maxwell-Chern-Simons theory
where a "self-duality" condition is imposed on the Maxwell field.
| [
{
"created": "Tue, 26 Sep 2000 14:24:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dereli",
"T.",
"",
"METU, Ankara"
],
[
"Sarioglu",
"O.",
"",
"METU, Ankara"
]
] | We give a general class of exact solutions to the (1+2)-dimensional topologically massive gravity model coupled with Maxwell-Chern-Simons theory where a "self-duality" condition is imposed on the Maxwell field. |
2206.05816 | Daniel Cartin | Daniel Cartin | Knotted 4-regular graphs: polynomial invariants and the Pachner moves | 25 pages; 27 figures; corrected both skein relation (1b) in Section
IV and discussion after Table I, with no change in the conclusions | J. Math. Phys. 63, 063502 (2022) | 10.1063/5.0088228 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In loop quantum gravity, states of quantum geometry are represented by
classes of knotted graphs, equivalent under diffeomorphisms. Thus, it is
worthwhile to enumerate and distinguish these classes. This paper looks at the
case of 4-regular graphs, which have an interpretation as objects dual to
triangulations of thr... | [
{
"created": "Sun, 12 Jun 2022 19:01:41 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Feb 2023 21:54:40 GMT",
"version": "v2"
}
] | 2023-02-09 | [
[
"Cartin",
"Daniel",
""
]
] | In loop quantum gravity, states of quantum geometry are represented by classes of knotted graphs, equivalent under diffeomorphisms. Thus, it is worthwhile to enumerate and distinguish these classes. This paper looks at the case of 4-regular graphs, which have an interpretation as objects dual to triangulations of three... |
0911.4141 | Jesper Grimstrup | Johannes Aastrup, Jesper M. Grimstrup | Lattice Loop Quantum Gravity | 3 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a separable version of Loop Quantum Gravity (LQG) based on an
inductive system of cubic lattices. We construct semi-classical states for
which the LQG operators -- the flux, the area and the volume operators -- have
the right classical limits. Also, we present the Hamilton and diffeomorphism
constraints as... | [
{
"created": "Fri, 20 Nov 2009 22:06:02 GMT",
"version": "v1"
}
] | 2009-11-24 | [
[
"Aastrup",
"Johannes",
""
],
[
"Grimstrup",
"Jesper M.",
""
]
] | We present a separable version of Loop Quantum Gravity (LQG) based on an inductive system of cubic lattices. We construct semi-classical states for which the LQG operators -- the flux, the area and the volume operators -- have the right classical limits. Also, we present the Hamilton and diffeomorphism constraints as o... |
2306.07925 | Muhammad Yasir | Muhammad Yasir, Xia Tiecheng, Farzan Mushtaq, Kazuharu Bamba | Testing new massive conformal gravity with the light deflection by black
hole | null | null | 10.1016/j.nuclphysb.2023.116257 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the weak gravitational lensing effect of
Non-Bocharova-Bronnikov-Melnikov-Bekenstein (BBMB) black hole in new massive
conformal gravity. We analyze the deflection angle of light caused by new
massive conformal gravity by using the gauss-bonnet theorem. As a consequence,
we obtain the gaussian optical curvatu... | [
{
"created": "Sun, 11 Jun 2023 04:49:57 GMT",
"version": "v1"
}
] | 2023-06-14 | [
[
"Yasir",
"Muhammad",
""
],
[
"Tiecheng",
"Xia",
""
],
[
"Mushtaq",
"Farzan",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | We study the weak gravitational lensing effect of Non-Bocharova-Bronnikov-Melnikov-Bekenstein (BBMB) black hole in new massive conformal gravity. We analyze the deflection angle of light caused by new massive conformal gravity by using the gauss-bonnet theorem. As a consequence, we obtain the gaussian optical curvature... |
gr-qc/0004037 | Marek Nowaskowski | Marek Nowakowski | The Consistent Newtonian Limit of Einstein's Gravity with a Cosmological
Constant | Latex, 15 pages, no figures, errors corrected | Int.J.Mod.Phys. D10 (2001) 649-662 | 10.1142/S0218271801001189 | null | gr-qc | null | We derive the `exact' Newtonian limit of general relativity with a positive
cosmological constant $\Lambda$. We point out that in contrast to the case with
$\Lambda = 0 $, the presence of a positive $\Lambda$ in Einsteins's equations
enforces, via the condition $| \Phi | \ll 1$, on the potential $\Phi$, a range
${\ca... | [
{
"created": "Wed, 12 Apr 2000 18:10:20 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jul 2000 16:50:36 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Nowakowski",
"Marek",
""
]
] | We derive the `exact' Newtonian limit of general relativity with a positive cosmological constant $\Lambda$. We point out that in contrast to the case with $\Lambda = 0 $, the presence of a positive $\Lambda$ in Einsteins's equations enforces, via the condition $| \Phi | \ll 1$, on the potential $\Phi$, a range ${\cal ... |
1202.0069 | Hossein Farajollahi | H. Farajollahi, A. Salehi | Universe acceleration and fine structure constant variation in BSBM
theory | 14 pages, 10 figures, final version with minor modification accepted
to be published in JCAP | JCAP02(2012)041 | 10.1088/1475-7516/2012/02/041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the utility of using SNe Ia observations in
constraining the cosmological parameters in BSBM theory where a scalar field is
responsible for both fine structure constant variation and late time universe
acceleration. The model is discussed in the presence of an exponential self
potential fo... | [
{
"created": "Wed, 1 Feb 2012 01:06:08 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Farajollahi",
"H.",
""
],
[
"Salehi",
"A.",
""
]
] | In this work we investigate the utility of using SNe Ia observations in constraining the cosmological parameters in BSBM theory where a scalar field is responsible for both fine structure constant variation and late time universe acceleration. The model is discussed in the presence of an exponential self potential for ... |
gr-qc/0209026 | Sergey M. Kozyrev | S.M.Kozyrev | Three-dimensional interior solutions from Jordan-Brans-Dicke Theory of
Gravity | null | null | null | null | gr-qc | null | We study spherically symmetric solutions to the Jordan-Brans-Dicke field
equations under the assumption that the space-time may possess an arbitrary
number of spatial dimensions. Assuming a perfect fluid with the equation of
state, we show that there are static interior nontrivial solutions in three
dimensional Jorda... | [
{
"created": "Mon, 9 Sep 2002 09:53:51 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Sep 2002 06:06:04 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kozyrev",
"S. M.",
""
]
] | We study spherically symmetric solutions to the Jordan-Brans-Dicke field equations under the assumption that the space-time may possess an arbitrary number of spatial dimensions. Assuming a perfect fluid with the equation of state, we show that there are static interior nontrivial solutions in three dimensional Jordan-... |
gr-qc/9308010 | Richard Easther University of Canterbury | Richard Easther | Exact Superstring Motivated Cosmological Models | 18 pages (includes 2 uuencoded postscript figures), NZ-CAN-RE-93/2 | Class.Quant.Grav.10:2203-2216,1993 | 10.1088/0264-9381/10/11/005 | null | gr-qc astro-ph | null | We present a number of new, exact scalar field cosmologies where the
potential consists of two or more exponential terms. Such potentials are
motivated by supergravity or superstring models formulated in higher
dimensional spacetimes that have been compactified to (3+1)-dimensions. We have
found solutions in both cur... | [
{
"created": "Wed, 11 Aug 1993 16:00:28 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Easther",
"Richard",
""
]
] | We present a number of new, exact scalar field cosmologies where the potential consists of two or more exponential terms. Such potentials are motivated by supergravity or superstring models formulated in higher dimensional spacetimes that have been compactified to (3+1)-dimensions. We have found solutions in both curve... |
gr-qc/0001035 | Pia Astone | P. Astone and G. Pizzella | On Upper Limits for Gravitational Radiation | 10 pages, 2 figures, latex files using cernlik.cls (included). This
paper and related work are also available at
http://grwav3.roma1.infn.it/pia/papersweb.html Version number 2: text
unchanged. Modified two references, adding the hep numbers | Astropart.Phys.16:441-450,2002 | 10.1016/S0927-6505(01)00166-9 | null | gr-qc hep-ex hep-ph math.PR physics.data-an | null | A procedure with a Bayesan approach for calculating upper limits to
gravitational wave bursts from coincidence experiments with multiple detectors
is described.
| [
{
"created": "Wed, 12 Jan 2000 14:26:45 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2000 09:32:45 GMT",
"version": "v2"
}
] | 2011-05-23 | [
[
"Astone",
"P.",
""
],
[
"Pizzella",
"G.",
""
]
] | A procedure with a Bayesan approach for calculating upper limits to gravitational wave bursts from coincidence experiments with multiple detectors is described. |
gr-qc/0403048 | Dae-Il Choi | Breno Imbiriba, John Baker, Dae-Il Choi, Joan Centrella, David R.
Fiske, J. David Brown, James R. van Meter, Kevin Olson | Evolving a puncture black hole with fixed mesh refinement | 18 pages, 12 figures. Minor changes, final PRD version | Phys.Rev. D70 (2004) 124025 | 10.1103/PhysRevD.70.124025 | null | gr-qc | null | We present an algorithm for treating mesh refinement interfaces in numerical
relativity. We detail the behavior of the solution near such interfaces located
in the strong field regions of dynamical black hole spacetimes, with particular
attention to the convergence properties of the simulations. In our applications
o... | [
{
"created": "Thu, 11 Mar 2004 22:09:17 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2006 20:13:36 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Imbiriba",
"Breno",
""
],
[
"Baker",
"John",
""
],
[
"Choi",
"Dae-Il",
""
],
[
"Centrella",
"Joan",
""
],
[
"Fiske",
"David R.",
""
],
[
"Brown",
"J. David",
""
],
[
"van Meter",
"James R.",
""
],
[
... | We present an algorithm for treating mesh refinement interfaces in numerical relativity. We detail the behavior of the solution near such interfaces located in the strong field regions of dynamical black hole spacetimes, with particular attention to the convergence properties of the simulations. In our applications of ... |
gr-qc/9608020 | null | M. Rainer and A. Zhuk | Tensor-multi-scalar theories from multidimensional cosmology | 14 pages, latex, to appear in Phys. Rev. D | Phys.Rev. D54 (1996) 6186-6192 | 10.1103/PhysRevD.54.6186 | IPM-96-149, FUB-HEP/96-3 | gr-qc | null | Inhomogeneous multidimensional cosmological models with a higher dimensional
space-time manifold M=M_0 x M_1 x ... M_n are investigated under dimensional
reduction to tensor-multi-scalar theories. In the Einstein conformal frame,
these theories take the shape of a flat sigma-model. For the singular case
where M_0 is ... | [
{
"created": "Thu, 8 Aug 1996 07:34:14 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Rainer",
"M.",
""
],
[
"Zhuk",
"A.",
""
]
] | Inhomogeneous multidimensional cosmological models with a higher dimensional space-time manifold M=M_0 x M_1 x ... M_n are investigated under dimensional reduction to tensor-multi-scalar theories. In the Einstein conformal frame, these theories take the shape of a flat sigma-model. For the singular case where M_0 is 2-... |
1910.03288 | Andronikos Paliathanasis | Andronikos Paliathanasis | Similarity solutions for the Wheeler-DeWitt equation in $f\left(
R\right) $-cosmology | 18 pages, 4 figures, to appear in EPJC | Eur. Phys. J. C 79, 1031 (2019) | 10.1140/epjc/s10052-019-7553-2 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the case of a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker
universe in $f\left( R\right) $-gravity we write the Wheeler-DeWitt equation of
quantum cosmology. The equation depends on the functional form of $f\left(
R\right) $. We select to work with four specific functions of $f\left( R\right)
$, in w... | [
{
"created": "Tue, 8 Oct 2019 09:04:39 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2019 08:13:31 GMT",
"version": "v2"
}
] | 2020-01-17 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | In the case of a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker universe in $f\left( R\right) $-gravity we write the Wheeler-DeWitt equation of quantum cosmology. The equation depends on the functional form of $f\left( R\right) $. We select to work with four specific functions of $f\left( R\right) $, in whi... |
1311.7565 | Sebastian Steinhaus | Bianca Dittrich and Sebastian Steinhaus | Time evolution as refining, coarse graining and entangling | 35 pages, 8 figures; v2: explanations and references added, improved
structure; v3 and v4: minor updates, accepted in New J. Phys | New J. Phys. 16 (2014) 123041 | 10.1088/1367-2630/16/12/123041 | null | gr-qc cond-mat.str-el hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that refining, coarse graining and entangling operators can be
obtained from time evolution operators. This applies in particular to geometric
theories, such as spin foams. We point out that this provides a construction
principle for the physical vacuum in quantum gravity theories and more
generally allows t... | [
{
"created": "Fri, 29 Nov 2013 13:53:43 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Sep 2014 14:49:51 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Nov 2014 16:14:00 GMT",
"version": "v3"
},
{
"created": "Thu, 4 Dec 2014 16:01:29 GMT",
"version": "v4"
}
] | 2014-12-16 | [
[
"Dittrich",
"Bianca",
""
],
[
"Steinhaus",
"Sebastian",
""
]
] | We argue that refining, coarse graining and entangling operators can be obtained from time evolution operators. This applies in particular to geometric theories, such as spin foams. We point out that this provides a construction principle for the physical vacuum in quantum gravity theories and more generally allows to ... |
1109.6005 | Christian Pfeifer | Christian Pfeifer, Mattias N. R. Wohlfarth | Beyond the speed of light on Finsler spacetimes | 5 pages, 1 figure, new discussion of observers and velocity
measurements, extensive improvements in the interpretation section,
discussion of modified dispersion relations extended | Physics Letters B 712 (2012), pp. 284-288 | 10.1016/j.physletb.2012.05.001 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As a prototypical massive field theory we study the scalar field on the
recently introduced Finsler spacetimes. We show that particle excitations exist
that propagate faster than the speed of light recognized as the boundary
velocity of observers. This effect appears already in Finsler spacetime
geometries with very ... | [
{
"created": "Tue, 27 Sep 2011 19:56:24 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2011 10:04:02 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Dec 2011 19:08:34 GMT",
"version": "v3"
},
{
"created": "Tue, 22 May 2012 09:41:34 GMT",
"version": "v4"
}
] | 2012-05-23 | [
[
"Pfeifer",
"Christian",
""
],
[
"Wohlfarth",
"Mattias N. R.",
""
]
] | As a prototypical massive field theory we study the scalar field on the recently introduced Finsler spacetimes. We show that particle excitations exist that propagate faster than the speed of light recognized as the boundary velocity of observers. This effect appears already in Finsler spacetime geometries with very sm... |
2106.06589 | Deep Chatterjee | Deep Chatterjee, Abhishek Hegade K. R., Gilbert Holder, Daniel E.
Holz, Scott Perkins, Kent Yagi, Nicol\'as Yunes | Cosmology with Love: Measuring the Hubble constant using neutron star
universal relations | accepted in PRD | null | 10.1103/PhysRevD.104.083528 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave cosmology began in 2017 with the observation of the
gravitational waves emitted in the merger of two neutron stars, and the
coincident observation of the electromagnetic emission that followed. Although
only a $30\%$ measurement of the Hubble constant was achieved, future
observations may yield mor... | [
{
"created": "Fri, 11 Jun 2021 19:26:08 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Oct 2021 18:20:58 GMT",
"version": "v2"
}
] | 2021-11-03 | [
[
"Chatterjee",
"Deep",
""
],
[
"R.",
"Abhishek Hegade K.",
""
],
[
"Holder",
"Gilbert",
""
],
[
"Holz",
"Daniel E.",
""
],
[
"Perkins",
"Scott",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolás",
""
]
] | Gravitational-wave cosmology began in 2017 with the observation of the gravitational waves emitted in the merger of two neutron stars, and the coincident observation of the electromagnetic emission that followed. Although only a $30\%$ measurement of the Hubble constant was achieved, future observations may yield more ... |
1704.08611 | Miguel Angel Garcia Aspeitia | Rub\'en O. Acu\~na-C\'ardenas, J. A. Astorga-Moreno, Miguel A.
Garcia-Aspeitia, J. C. L\'opez-Dom\'inguez | The presence of a Phantom field in a Randall-Sundrum scenario | 11 pages, 8 figures. Accepted for publication in Class. and Quantum
Grav | null | 10.1088/1361-6382/aa9c61 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presence of phantom dark energy in brane world cosmology generates
important new effects, causing a premature Big Rip singularity when we increase
the presence of extra dimension and considerably competing with the other
components of our Universe. The idea is based first, in only considering a
field with the cha... | [
{
"created": "Thu, 27 Apr 2017 14:59:14 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Nov 2017 00:34:14 GMT",
"version": "v2"
}
] | 2018-02-14 | [
[
"Acuña-Cárdenas",
"Rubén O.",
""
],
[
"Astorga-Moreno",
"J. A.",
""
],
[
"Garcia-Aspeitia",
"Miguel A.",
""
],
[
"López-Domínguez",
"J. C.",
""
]
] | The presence of phantom dark energy in brane world cosmology generates important new effects, causing a premature Big Rip singularity when we increase the presence of extra dimension and considerably competing with the other components of our Universe. The idea is based first, in only considering a field with the chara... |
gr-qc/9410027 | Paulo Rodrigues Lima Vargas Moniz | O. Bertolami and P.V. Moniz | Decoherence of Friedmann-Robertson-Walker Geometries in the Presence of
Massive Vector Fields with U(1) or SO(3) Global Symmetries | 26 pages, CERN-TH.7241/94 DAMTP R-94/22 | Nucl.Phys.B439:259-290,1995 | 10.1016/0550-3213(95)00049-X | null | gr-qc | null | Retrieval of classical behaviour in quantum cosmology is usually discussed in
the framework of {\em midi}superspace models in the presence of scalar fields
and the inhomogeneous modes corresponding either to gravitational or scalar
fields. In this work, we propose an alternative model to study the decoherence
of homo... | [
{
"created": "Wed, 19 Oct 1994 13:57:28 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Bertolami",
"O.",
""
],
[
"Moniz",
"P. V.",
""
]
] | Retrieval of classical behaviour in quantum cosmology is usually discussed in the framework of {\em midi}superspace models in the presence of scalar fields and the inhomogeneous modes corresponding either to gravitational or scalar fields. In this work, we propose an alternative model to study the decoherence of homoge... |
1911.01847 | Reginald Christian Bernardo | Reginald Christian Bernardo, John Celestial, Ian Vega | Stealth black holes in shift symmetric kinetic gravity braiding | 8 pages; matches accepted version | Phys. Rev. D 101, 024036 (2020) | 10.1103/PhysRevD.101.024036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive all hairy stealth black holes in the most general second-order,
shift symmetric, scalar-tensor theory with luminally propagating gravitational
waves, often called kinetic gravity braiding. Our approach exploits an
overlooked loophole in a recently obtained no-go statement which claims shift
symmetry breakin... | [
{
"created": "Tue, 5 Nov 2019 15:00:56 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Dec 2019 05:35:18 GMT",
"version": "v2"
}
] | 2020-01-20 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Celestial",
"John",
""
],
[
"Vega",
"Ian",
""
]
] | We derive all hairy stealth black holes in the most general second-order, shift symmetric, scalar-tensor theory with luminally propagating gravitational waves, often called kinetic gravity braiding. Our approach exploits an overlooked loophole in a recently obtained no-go statement which claims shift symmetry breaking ... |
1108.2332 | Tevian Dray | Don Hickethier and Tevian Dray | Covariant Derivatives on Null Submanifolds | 13 pages, no figures | Gen. Rel. Grav. 44, 225-238 (2012) | 10.1007/s10714-011-1275-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The degenerate nature of the metric on null hypersurfaces makes it difficult
to define a covariant derivative on null submanifolds. Recent approaches using
decomposition to define a covariant derivative on null hypersurfaces are
investigated, with examples demonstrating the limitations of the methods.
Motivated by Ge... | [
{
"created": "Thu, 11 Aug 2011 06:17:26 GMT",
"version": "v1"
}
] | 2012-09-04 | [
[
"Hickethier",
"Don",
""
],
[
"Dray",
"Tevian",
""
]
] | The degenerate nature of the metric on null hypersurfaces makes it difficult to define a covariant derivative on null submanifolds. Recent approaches using decomposition to define a covariant derivative on null hypersurfaces are investigated, with examples demonstrating the limitations of the methods. Motivated by Gero... |
2208.04023 | Aneta Wojnar | Aneta Wojnar | Fermi gas and modified gravity | 11 pages, a few references added, accepted to Phys. Rev. D | Phys. Rev. D 107, 044025 (2023) | 10.1103/PhysRevD.107.044025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the equations of state of Fermi gas by maximizing the Fermi-Dirac
entropy in modified gravity in relativistic and non-relativistic case. It will
be demonstrated that the microphysics must depend on a given theory of gravity
in order to consistently describe a physical system at a statistical
equilibrium sta... | [
{
"created": "Mon, 8 Aug 2022 10:11:57 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2023 15:46:46 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Jan 2023 09:34:07 GMT",
"version": "v3"
}
] | 2023-02-14 | [
[
"Wojnar",
"Aneta",
""
]
] | We derive the equations of state of Fermi gas by maximizing the Fermi-Dirac entropy in modified gravity in relativistic and non-relativistic case. It will be demonstrated that the microphysics must depend on a given theory of gravity in order to consistently describe a physical system at a statistical equilibrium state... |
gr-qc/0006073 | David Garfinkle | David Garfinkle and G. Comer Duncan | Numerical evolution of Brill waves | added more discussion of results and several references | Phys.Rev. D63 (2001) 044011 | 10.1103/PhysRevD.63.044011 | null | gr-qc | null | We report a numerical evolution of axisymmetric Brill waves. The numerical
algorithm has new features, including (i) a method for keeping the metric
regular on the axis and (ii) the use of coordinates that bring spatial infinity
to the edge of the computational grid. The dependence of the evolved metric on
both the a... | [
{
"created": "Tue, 20 Jun 2000 22:52:30 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Oct 2000 20:40:04 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Garfinkle",
"David",
""
],
[
"Duncan",
"G. Comer",
""
]
] | We report a numerical evolution of axisymmetric Brill waves. The numerical algorithm has new features, including (i) a method for keeping the metric regular on the axis and (ii) the use of coordinates that bring spatial infinity to the edge of the computational grid. The dependence of the evolved metric on both the amp... |
gr-qc/9905042 | Kleidis Kostas | K. Kleidis, A. Kouirukidis, D. B. Papadopoulos and H. Varvoglis | Higher-dimensional models in gravitational theories of
quarticLagrangians | LaTeXfile, 22 pages | J.Math.Phys. 38 (1997) 3166 | 10.1063/1.532041 | null | gr-qc | null | Ten-dimensional models, arising from a gravitational action which includes
terms up to the fourth order in curvature tensor, are discussed. The spacetime
consists of one timelike dimension and two maximally symmetric subspaces,
filled with matter in the form of an anisotropic fluid. Numerical integration
of the cosmo... | [
{
"created": "Thu, 13 May 1999 12:20:23 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Kleidis",
"K.",
""
],
[
"Kouirukidis",
"A.",
""
],
[
"Papadopoulos",
"D. B.",
""
],
[
"Varvoglis",
"H.",
""
]
] | Ten-dimensional models, arising from a gravitational action which includes terms up to the fourth order in curvature tensor, are discussed. The spacetime consists of one timelike dimension and two maximally symmetric subspaces, filled with matter in the form of an anisotropic fluid. Numerical integration of the cosmolo... |
1811.04711 | Thomas M\"adler | Thomas M\"adler, Jeffrey Winicour | Kerr Black Holes and Nonlinear Radiation Memory | 17 pages, revised discussion section | Class. Quantum Grav. 36 (2019) 095009 (19pp) | 10.1088/1361-6382/ab1187 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Minkowski background intrinsic to the Kerr-Schild version of the Kerr
metric provides a definition of a boosted spinning black hole. There are two
Kerr-Schild versions corresponding to ingoing or outgoing principal null
directions. The two corresponding Minkowski backgrounds and their associated
boosts differ dra... | [
{
"created": "Mon, 12 Nov 2018 13:19:33 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Nov 2018 22:33:13 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Mar 2019 15:59:35 GMT",
"version": "v3"
}
] | 2019-04-15 | [
[
"Mädler",
"Thomas",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | The Minkowski background intrinsic to the Kerr-Schild version of the Kerr metric provides a definition of a boosted spinning black hole. There are two Kerr-Schild versions corresponding to ingoing or outgoing principal null directions. The two corresponding Minkowski backgrounds and their associated boosts differ drast... |
2401.00835 | Clara Rojas | Daniel Pozo, Lenin Calvache, Esteban Orozco, and Clara Rojas | Observational predictions of some inflationary models | 26 pages, 8 Figures, 6 tables | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | This paper presents the CMB angular power spectrum obtained using the CAMB
code for three different models of inflation: the Starobinsky inflationary
model, the generalized Starobinsky inflationary model, and the chaotic
inflationary model with a step. The results are compared with the most recent
data reported for t... | [
{
"created": "Mon, 1 Jan 2024 18:24:30 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jan 2024 18:54:50 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Apr 2024 16:53:31 GMT",
"version": "v3"
}
] | 2024-05-01 | [
[
"Pozo",
"Daniel",
""
],
[
"Calvache",
"Lenin",
""
],
[
"Orozco",
"Esteban",
""
],
[
"Rojas",
"Clara",
""
]
] | This paper presents the CMB angular power spectrum obtained using the CAMB code for three different models of inflation: the Starobinsky inflationary model, the generalized Starobinsky inflationary model, and the chaotic inflationary model with a step. The results are compared with the most recent data reported for the... |
1609.02571 | Yi-Fu Cai | Jie-Wen Chen, Junyu Liu, Hao-Lan Xu, Yi-Fu Cai | Tracing Primordial Black Holes in Nonsingular Bouncing Cosmology | 19 pages, 4 figures, comments are welcome | Physics Letters B 769 (2017) 561 | 10.1016/j.physletb.2017.03.036 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We in this paper investigate the formation and evolution of primordial black
holes (PBHs) in nonsingular bouncing cosmologies. We discuss the formation of
PBH in the contracting phase and calculate the PBH abundance as a function of
the sound speed and Hubble parameter. Afterwards, by taking into account the
subseque... | [
{
"created": "Thu, 8 Sep 2016 20:00:41 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Sep 2016 02:04:59 GMT",
"version": "v2"
},
{
"created": "Wed, 17 May 2017 16:11:26 GMT",
"version": "v3"
}
] | 2017-05-18 | [
[
"Chen",
"Jie-Wen",
""
],
[
"Liu",
"Junyu",
""
],
[
"Xu",
"Hao-Lan",
""
],
[
"Cai",
"Yi-Fu",
""
]
] | We in this paper investigate the formation and evolution of primordial black holes (PBHs) in nonsingular bouncing cosmologies. We discuss the formation of PBH in the contracting phase and calculate the PBH abundance as a function of the sound speed and Hubble parameter. Afterwards, by taking into account the subsequent... |
1306.5816 | Edward Anderson | Edward Anderson | Problem of Time: Facets and Machian Strategy | Longer version (more introductory explanations of problem of time's
terminology, more references), as Accepted by `Annals of the New York Academy
of Sciences' | Ann. N.Y. Acad. Sci. Vol 1326 p42 (2014) | 10.1111/nyas.12510 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Problem of Time is that `time' in each of ordinary quantum theory and
general relativity are mutually incompatible notions. This causes difficulties
in trying to put these two theories together to form a theory of Quantum
Gravity. The Problem of Time has 8 facets in canonical approaches. I clarify
that all but on... | [
{
"created": "Tue, 25 Jun 2013 00:05:56 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jun 2013 19:38:38 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Mar 2014 01:09:41 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Jul 2014 10:32:24 GMT",
"version": "v4"
}
] | 2015-06-16 | [
[
"Anderson",
"Edward",
""
]
] | The Problem of Time is that `time' in each of ordinary quantum theory and general relativity are mutually incompatible notions. This causes difficulties in trying to put these two theories together to form a theory of Quantum Gravity. The Problem of Time has 8 facets in canonical approaches. I clarify that all but one ... |
1912.00946 | P. A. Gonzalez | P. A. Gonz\'alez, Marco Olivares, Eleftherios Papantonopoulos and
Yerko V\'asquez | Motion and trajectories of photons in a three-dimensional rotating
Ho\v{r}ava AdS black hole | 16 pages, 12 figures, references added, minor changes, accepted for
publication in PRD | Phys. Rev. D 101, 044018 (2020) | 10.1103/PhysRevD.101.044018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of photons in the background of a three-dimensional
rotating Ho\v{r}ava AdS black hole that corresponds to a Lorentz-violating
version of the BTZ black hole and we analyze the effect of the breaking of
Lorentz invariance on the null geodesics structure, by solving analytically the
equations of mot... | [
{
"created": "Mon, 25 Nov 2019 13:09:52 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2020 17:40:29 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"González",
"P. A.",
""
],
[
"Olivares",
"Marco",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Vásquez",
"Yerko",
""
]
] | We study the motion of photons in the background of a three-dimensional rotating Ho\v{r}ava AdS black hole that corresponds to a Lorentz-violating version of the BTZ black hole and we analyze the effect of the breaking of Lorentz invariance on the null geodesics structure, by solving analytically the equations of motio... |
2405.09475 | Xin Zhang | Chun-Yu Xiong, Tian-Yang Sun, Jing-Fei Zhang, Xin Zhang | Robust inference of gravitational wave source parameters in the presence
of noise transients using normalizing flows | 13 pages, 9 figures | null | null | null | gr-qc astro-ph.CO astro-ph.IM hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave (GW) detection is of paramount importance in fundamental
physics and GW astronomy, yet it presents formidable challenges. One
significant challenge is the removal of noise transient artifacts known as
``glitches," which greatly impact the search and identification of GWs. Recent
research has achiev... | [
{
"created": "Wed, 15 May 2024 16:11:49 GMT",
"version": "v1"
}
] | 2024-05-16 | [
[
"Xiong",
"Chun-Yu",
""
],
[
"Sun",
"Tian-Yang",
""
],
[
"Zhang",
"Jing-Fei",
""
],
[
"Zhang",
"Xin",
""
]
] | Gravitational wave (GW) detection is of paramount importance in fundamental physics and GW astronomy, yet it presents formidable challenges. One significant challenge is the removal of noise transient artifacts known as ``glitches," which greatly impact the search and identification of GWs. Recent research has achieved... |
gr-qc/9706063 | Mikhail Yu. Zotov | D. V. Gal'tsov, E. E. Donets, M. Yu. Zotov | Singularities inside non-Abelian black holes | REVTeX, 9 pages, 2 EPS figures, uses epsf.sty | Pisma Zh.Eksp.Teor.Fiz.65:855,1997 | 10.1134/1.567446 | null | gr-qc | null | Singularities inside static spherically symmetric black holes in the SU(2)
Einstein-Yang-Mills and Einstein-Yang-Mills-dilaton theories are investigated.
Analytical formulas are presented describing oscillatory and power law metric
behavior near spacelike singularities in generic solutions.
| [
{
"created": "Fri, 20 Jun 1997 13:21:46 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Gal'tsov",
"D. V.",
""
],
[
"Donets",
"E. E.",
""
],
[
"Zotov",
"M. Yu.",
""
]
] | Singularities inside static spherically symmetric black holes in the SU(2) Einstein-Yang-Mills and Einstein-Yang-Mills-dilaton theories are investigated. Analytical formulas are presented describing oscillatory and power law metric behavior near spacelike singularities in generic solutions. |
gr-qc/9808013 | Norimasa Sugiura | Norimasa Sugiura | Friedmann Limit of a point mass universe (is not
Friedmann):Gravinational Lens Effect | 4 pages, Latex, 1 figure | null | null | KUNS-1521 | gr-qc | null | We study the distance-redshift relation in a universe filled with point
particles, and discuss what the universe looks like when we make the number of
particles N very large, while fixing the averaged mass density. Using the
Raychaudhuri equation and a simple analysis of the probability of strong
lensing effects, we ... | [
{
"created": "Wed, 5 Aug 1998 10:00:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sugiura",
"Norimasa",
""
]
] | We study the distance-redshift relation in a universe filled with point particles, and discuss what the universe looks like when we make the number of particles N very large, while fixing the averaged mass density. Using the Raychaudhuri equation and a simple analysis of the probability of strong lensing effects, we sh... |
1508.06273 | Timothy Wiser | Brandon Buscaino, Daniel DeBra, Peter W. Graham, Giorgio Gratta,
Timothy D. Wiser | Testing long-distance modifications of gravity to 100 astronomical units | 14 pages, 7 figures; v3: refined discussion of systematics, corrected
a numerical error; matches published version | Phys. Rev. D 92, 104048 (2015) | 10.1103/PhysRevD.92.104048 | null | gr-qc astro-ph.EP hep-ex hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are very few direct experimental tests of the inverse square law of
gravity at distances comparable to the scale of the Solar System and beyond.
Here we describe a possible space mission optimized to test the inverse square
law at a scale of up to 100 AU. For example, sensitivity to a Yukawa correction
with a s... | [
{
"created": "Tue, 25 Aug 2015 20:05:17 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Sep 2015 22:37:17 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Nov 2015 20:58:42 GMT",
"version": "v3"
}
] | 2015-11-25 | [
[
"Buscaino",
"Brandon",
""
],
[
"DeBra",
"Daniel",
""
],
[
"Graham",
"Peter W.",
""
],
[
"Gratta",
"Giorgio",
""
],
[
"Wiser",
"Timothy D.",
""
]
] | There are very few direct experimental tests of the inverse square law of gravity at distances comparable to the scale of the Solar System and beyond. Here we describe a possible space mission optimized to test the inverse square law at a scale of up to 100 AU. For example, sensitivity to a Yukawa correction with a str... |
gr-qc/0207065 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Angelo Tartaglia | Gravitomagnetic effects | 30 pages, LaTeX, To appear in Nuovo Cimento B, new references added | Nuovo Cim.B117:743-768,2002 | null | null | gr-qc | null | This paper contains a review of the theory and practice of gravitomagnetism,
with particular attention to the different and numerous proposals which have
been put forward to experimentally or observationally verify its effects. The
basics of the gravitoelectromagnetic form of the Einstein equations is
expounded. Then... | [
{
"created": "Wed, 17 Jul 2002 16:15:40 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2002 15:44:43 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Tartaglia",
"Angelo",
""
]
] | This paper contains a review of the theory and practice of gravitomagnetism, with particular attention to the different and numerous proposals which have been put forward to experimentally or observationally verify its effects. The basics of the gravitoelectromagnetic form of the Einstein equations is expounded. Then t... |
2403.12796 | Giuseppe Sarracino | Salvatore Capozziello, Giuseppe Sarracino, Giulia De Somma | A critical discussion on the $H_0$ tension | 33 pages, 7 figures | Universe, 10, 140 (2024) | 10.3390/universe10030140 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A critical discussion on the $H_0$ Hubble constant tension is presented by
considering both early and late-type observations. From recent precise
measurements, discrepancies emerge when comparing results for some cosmological
quantities obtained at different redshifts. We highlight the most relevant
measurements of $... | [
{
"created": "Wed, 13 Mar 2024 15:09:21 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Sarracino",
"Giuseppe",
""
],
[
"De Somma",
"Giulia",
""
]
] | A critical discussion on the $H_0$ Hubble constant tension is presented by considering both early and late-type observations. From recent precise measurements, discrepancies emerge when comparing results for some cosmological quantities obtained at different redshifts. We highlight the most relevant measurements of $H_... |
0809.2275 | Jerzy Matyjasek | Jerzy Matyjasek, Dariusz Tryniecki and Mariusz Klimek | Regular black holes in an asymptotically de Sitter universe | null | Mod.Phys.Lett.A23:3377-3392,2009 | 10.1142/S0217732308028715 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A regular solution of the system of coupled equations of the nonlinear
electrodynamics and gravity describing static and spherically-symmetric black
holes in an asymptotically de Sitter universe is constructed and analyzed.
Special emphasis is put on the degenerate configurations (when at least two
horizons coincide)... | [
{
"created": "Fri, 12 Sep 2008 19:43:35 GMT",
"version": "v1"
}
] | 2009-02-12 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Tryniecki",
"Dariusz",
""
],
[
"Klimek",
"Mariusz",
""
]
] | A regular solution of the system of coupled equations of the nonlinear electrodynamics and gravity describing static and spherically-symmetric black holes in an asymptotically de Sitter universe is constructed and analyzed. Special emphasis is put on the degenerate configurations (when at least two horizons coincide) a... |
1009.2485 | Holger M\"uller | Michael A. Hohensee, Brian Estey, Francisco Monsalve, Geena Kim,
Pei-Chen Kuan, Shau-Yu Lan, Nan Yu, Achim Peters, Steven Chu, and Holger
Mueller | Gravitational Redshift, Equivalence Principle, and Matter Waves | Work in progress. 11 pages | J.Phys.Conf.Ser.264:012009,2011 | 10.1088/1742-6596/264/1/012009 | null | gr-qc physics.atom-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review matter wave and clock comparison tests of the gravitational
redshift. To elucidate their relationship to tests of the universality of free
fall (UFF), we define scenarios wherein redshift violations are coupled to
violations of UFF ("type II"), or independent of UFF violations ("type III"),
respectively. Cl... | [
{
"created": "Mon, 13 Sep 2010 19:31:12 GMT",
"version": "v1"
}
] | 2011-02-02 | [
[
"Hohensee",
"Michael A.",
""
],
[
"Estey",
"Brian",
""
],
[
"Monsalve",
"Francisco",
""
],
[
"Kim",
"Geena",
""
],
[
"Kuan",
"Pei-Chen",
""
],
[
"Lan",
"Shau-Yu",
""
],
[
"Yu",
"Nan",
""
],
[
"Peter... | We review matter wave and clock comparison tests of the gravitational redshift. To elucidate their relationship to tests of the universality of free fall (UFF), we define scenarios wherein redshift violations are coupled to violations of UFF ("type II"), or independent of UFF violations ("type III"), respectively. Cloc... |
1610.00432 | Kazufumi Takahashi | Kazufumi Takahashi, Teruaki Suyama | Linear perturbation analysis of hairy black holes in shift-symmetric
Horndeski theories: Odd-parity perturbations | 9 pages; matches published version | Phys. Rev. D 95, 024034 (2017) | 10.1103/PhysRevD.95.024034 | RESCEU-30/16 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the mode stability of odd-parity perturbations of black holes with
linearly time-dependent scalar hair in shift-symmetric Horndeski theories. We
show that a large class of black hole solutions in these theories suffer from
ghost or gradient instability, while there are some classes of solutions that
are st... | [
{
"created": "Mon, 3 Oct 2016 07:41:17 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jan 2017 03:28:22 GMT",
"version": "v2"
}
] | 2017-02-01 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Suyama",
"Teruaki",
""
]
] | We analyze the mode stability of odd-parity perturbations of black holes with linearly time-dependent scalar hair in shift-symmetric Horndeski theories. We show that a large class of black hole solutions in these theories suffer from ghost or gradient instability, while there are some classes of solutions that are stab... |
gr-qc/9308013 | null | G. Oliveira-Neto | Did the Pseudo-Sphere Universe have a Beginning? | 42 pages (plus 8 figures available from the author as ordinary
copies), plain TeX, NCL-93/TP-5 | null | null | null | gr-qc | null | A calculation of the no-boundary wave-function of the universe is put forward
for a spacetime with negative curvature. A semi-classical Robertson-Walker
approximation is attempted and two solutions to the field equations, one
Lorentzian and the other a tunneling one are found. The regularity of those
solutions are an... | [
{
"created": "Thu, 12 Aug 1993 12:55:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Oliveira-Neto",
"G.",
""
]
] | A calculation of the no-boundary wave-function of the universe is put forward for a spacetime with negative curvature. A semi-classical Robertson-Walker approximation is attempted and two solutions to the field equations, one Lorentzian and the other a tunneling one are found. The regularity of those solutions are anal... |
1410.6509 | Rafael Ferraro | Rafael Ferraro | Relational Mechanics as a gauge theory | 15 pages, 1 figure. Main changes in Section III; citations added | Gen. Relativ. Gravit. 48:23 (2016) | 10.1007/s10714-016-2018-5 | null | gr-qc astro-ph.GA hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Absolute space is eliminated from the body of mechanics by gauging
translations and rotations in the Lagrangian of a classical system. The
procedure implies the addition of compensating terms to the kinetic energy, in
such a way that the resulting equations of motion are valid in any frame. The
compensating terms pro... | [
{
"created": "Thu, 23 Oct 2014 21:27:45 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jan 2015 21:07:40 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Feb 2016 13:58:16 GMT",
"version": "v3"
}
] | 2016-02-03 | [
[
"Ferraro",
"Rafael",
""
]
] | Absolute space is eliminated from the body of mechanics by gauging translations and rotations in the Lagrangian of a classical system. The procedure implies the addition of compensating terms to the kinetic energy, in such a way that the resulting equations of motion are valid in any frame. The compensating terms provi... |
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