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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2201.05178 | Abhishek Hegade K R | Abhishek Hegade K. R., Elias R. Most, Jorge Noronha, Helvi Witek and
Nicolas Yunes | How Do Spherical Black Holes Grow Monopole Hair? | v2 : 23 pages, minor corrections in text, matches published version | Phys. Rev. D 105, 064041 (2022) | 10.1103/PhysRevD.105.064041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes in certain modified gravity theories that contain a scalar field
coupled to curvature invariants are known to possess (monopole) scalar hair
while non-black-hole spacetimes (like neutron stars) do not. Therefore, as a
neutron star collapses to a black hole, scalar hair must grow until it settles
to the st... | [
{
"created": "Thu, 13 Jan 2022 19:08:06 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Apr 2022 16:24:01 GMT",
"version": "v2"
}
] | 2022-04-05 | [
[
"R.",
"Abhishek Hegade K.",
""
],
[
"Most",
"Elias R.",
""
],
[
"Noronha",
"Jorge",
""
],
[
"Witek",
"Helvi",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Black holes in certain modified gravity theories that contain a scalar field coupled to curvature invariants are known to possess (monopole) scalar hair while non-black-hole spacetimes (like neutron stars) do not. Therefore, as a neutron star collapses to a black hole, scalar hair must grow until it settles to the stat... |
gr-qc/0406102 | J. Brian Pitts | J. Brian Pitts, W. C. Schieve | Null Cones and Einstein's Equations in Minkowski Spacetime | null | Found.Phys. 34 (2004) 211 | 10.1023/B:FOOP.0000019582.44548.6a | null | gr-qc hep-th | null | If Einstein's equations are to describe a field theory of gravity in
Minkowski spacetime, then causality requires that the effective curved metric
must respect the flat background metric's null cone. The kinematical problem is
solved using a generalized eigenvector formalism based on the Segr\'{e}
classification of s... | [
{
"created": "Fri, 25 Jun 2004 06:30:05 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Pitts",
"J. Brian",
""
],
[
"Schieve",
"W. C.",
""
]
] | If Einstein's equations are to describe a field theory of gravity in Minkowski spacetime, then causality requires that the effective curved metric must respect the flat background metric's null cone. The kinematical problem is solved using a generalized eigenvector formalism based on the Segr\'{e} classification of sym... |
2307.16610 | Gonzalo Morras | Gonzalo Morras, Jose Francisco Nuno Siles, Juan Garcia-Bellido | Efficient Reduced Order Quadrature Construction Algorithms for Fast
Gravitational Wave Inference | 21 pages, 9 figures | Phys. Rev. D 108, 123025 (2023) | 10.1103/PhysRevD.108.123025 | IFT-UAM/CSIC-23-100 | gr-qc astro-ph.CO astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Reduced Order Quadrature (ROQ) methods can greatly reduce the computational
cost of Gravitational Wave (GW) likelihood evaluations, and therefore greatly
speed up parameter estimation analyses, which is a vital part to maximize the
science output of advanced GW detectors. In this paper, we do an in-depth study
of ROQ... | [
{
"created": "Mon, 31 Jul 2023 12:36:11 GMT",
"version": "v1"
}
] | 2023-12-18 | [
[
"Morras",
"Gonzalo",
""
],
[
"Siles",
"Jose Francisco Nuno",
""
],
[
"Garcia-Bellido",
"Juan",
""
]
] | Reduced Order Quadrature (ROQ) methods can greatly reduce the computational cost of Gravitational Wave (GW) likelihood evaluations, and therefore greatly speed up parameter estimation analyses, which is a vital part to maximize the science output of advanced GW detectors. In this paper, we do an in-depth study of ROQ t... |
1501.00819 | Shahab Shahidi | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi and Shahab Shahidi | Cosmology of a Lorentz violating Galileon theory | 19 pages, 17 figures | JCAP 05 (2015) 022 | 10.1088/1475-7516/2015/05/022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We modify the scalar Einstein-aether theory by breaking the Lorentz
invariance of a gravitational theory coupled to a Galileon type scalar field.
This is done by introducing a Lagrange multiplier term into the action, thus
ensuring that the gradient of the scalar field is time-like, with unit norm.
The theory can als... | [
{
"created": "Mon, 5 Jan 2015 11:07:31 GMT",
"version": "v1"
},
{
"created": "Tue, 26 May 2015 07:14:59 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We modify the scalar Einstein-aether theory by breaking the Lorentz invariance of a gravitational theory coupled to a Galileon type scalar field. This is done by introducing a Lagrange multiplier term into the action, thus ensuring that the gradient of the scalar field is time-like, with unit norm. The theory can also ... |
gr-qc/0503083 | Peter Leifer | Peter Leifer | The affine gauge theory in the quantum phase space CP(N-1) | 12 pages, LaTeX | null | null | null | gr-qc | null | In the present article I propose a non-linear relativistic 4-d field model
originated by the internal dynamics in CP(N-1). There is no initially
distinction between `particle' and `field', and the space-time manifold is
derivable. The main idea is to base the theory on the relative amplitudes
solely. Quantum measurem... | [
{
"created": "Sat, 19 Mar 2005 14:17:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Leifer",
"Peter",
""
]
] | In the present article I propose a non-linear relativistic 4-d field model originated by the internal dynamics in CP(N-1). There is no initially distinction between `particle' and `field', and the space-time manifold is derivable. The main idea is to base the theory on the relative amplitudes solely. Quantum measuremen... |
1312.4332 | C. Q. Geng | Jung-Tsung Li, Yi-Peng Wu and Chao-Qiang Geng | Parametrized Post-Newtonian Limit of Teleparallel Dark Energy Model | 18 pages, no figure, revised version accepted for publication in PRD | Phys. Rev. D 89, 044040 (2014) | 10.1103/PhysRevD.89.044040 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the post-Newtonian limit in the teleparallel equivalent of General
Relativity with a scalar field which non-minimally couples to gravity. The
metric perturbation is obtained from the vierbein field expansion with respect
to the Minkowski background. Due to the structure of the teleparallel gravity
Lagrangian... | [
{
"created": "Mon, 16 Dec 2013 12:38:51 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2014 06:24:35 GMT",
"version": "v2"
}
] | 2014-03-05 | [
[
"Li",
"Jung-Tsung",
""
],
[
"Wu",
"Yi-Peng",
""
],
[
"Geng",
"Chao-Qiang",
""
]
] | We study the post-Newtonian limit in the teleparallel equivalent of General Relativity with a scalar field which non-minimally couples to gravity. The metric perturbation is obtained from the vierbein field expansion with respect to the Minkowski background. Due to the structure of the teleparallel gravity Lagrangian, ... |
gr-qc/0507110 | Burkhard Kleihaus | Rustam Ibadov, Burkhard Kleihaus, Jutta Kunz and Marion Wirschins | New Black Hole Solutions with Axial Symmetry in Einstein-Yang-Mills
Theory | 11 pages, 3 figures | Phys.Lett. B627 (2005) 180-187 | 10.1016/j.physletb.2005.08.108 | null | gr-qc | null | We construct new black hole solutions in Einstein-Yang-Mills theory. They are
static, axially symmetric and asymptotically flat. They are characterized by
their horizon radius and a pair of integers (k,n), where k is related to the
polar angle and n to the azimuthal angle. The known spherically and axially
symmetric ... | [
{
"created": "Tue, 26 Jul 2005 10:48:10 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ibadov",
"Rustam",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Wirschins",
"Marion",
""
]
] | We construct new black hole solutions in Einstein-Yang-Mills theory. They are static, axially symmetric and asymptotically flat. They are characterized by their horizon radius and a pair of integers (k,n), where k is related to the polar angle and n to the azimuthal angle. The known spherically and axially symmetric EY... |
0809.2567 | Roh Suan Tung | Roh-Suan Tung and Hoi-Lai Yu | Quasi-Local Energy Flux of Spacetime Perturbation | 8 pages, added appendix, version to appear in Phys. Rev. D | Phys.Rev.D78:104010,2008 | 10.1103/PhysRevD.78.104010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general expression for quasi-local energy flux for spacetime perturbation
is derived from covariant Hamiltonian formulation using functional
differentiability and symplectic structure invariance, which is independent of
the choice of the canonical variables and the possible boundary terms one
initially puts into th... | [
{
"created": "Mon, 15 Sep 2008 17:18:30 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Oct 2008 03:30:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Tung",
"Roh-Suan",
""
],
[
"Yu",
"Hoi-Lai",
""
]
] | A general expression for quasi-local energy flux for spacetime perturbation is derived from covariant Hamiltonian formulation using functional differentiability and symplectic structure invariance, which is independent of the choice of the canonical variables and the possible boundary terms one initially puts into the ... |
1004.0826 | Mladen Martinis Dr | M. Martinis and N. Perkovi\'c | On the Gravitational Energy Shift for matter waves | 7 pages | null | null | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational energy shift for photons is extended to all mass-equivalent
energies $E = mc^2$, obeying the quantum condition $E = h\nu$.On an example of
a relativistic binary system, it was shown that the gravitational energy shift
would imply,in contrast to Newtonian gravity, the gravitational attraction
between... | [
{
"created": "Tue, 6 Apr 2010 11:25:39 GMT",
"version": "v1"
}
] | 2010-04-07 | [
[
"Martinis",
"M.",
""
],
[
"Perković",
"N.",
""
]
] | The gravitational energy shift for photons is extended to all mass-equivalent energies $E = mc^2$, obeying the quantum condition $E = h\nu$.On an example of a relativistic binary system, it was shown that the gravitational energy shift would imply,in contrast to Newtonian gravity, the gravitational attraction between f... |
gr-qc/9803093 | Pedro Marronetti | P. Marronetti, G. J. Mathews, J. R. Wilson | Binary Neutron-Star Systems: From the Newtonian Regime to the Last
Stable Orbit | 4 pages, 3 postscript figures. Data points added to fig 2; some
issues clarified; references added | Phys.Rev.D58:107503,1998 | 10.1103/PhysRevD.58.107503 | null | gr-qc | null | We report on the first calculations of fully relativistic binary circular
orbits to span a range of separation distances from the innermost stable
circular orbit (ISCO), deeply inside the strong field regime, to a distance
($\sim$ 200 km) where the system is accurately described by Newtonian dynamics.
We consider a b... | [
{
"created": "Fri, 27 Mar 1998 15:51:09 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Sep 1998 17:14:01 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Marronetti",
"P.",
""
],
[
"Mathews",
"G. J.",
""
],
[
"Wilson",
"J. R.",
""
]
] | We report on the first calculations of fully relativistic binary circular orbits to span a range of separation distances from the innermost stable circular orbit (ISCO), deeply inside the strong field regime, to a distance ($\sim$ 200 km) where the system is accurately described by Newtonian dynamics. We consider a bin... |
1612.09566 | David Keitel | David Keitel, Xisco Jim\'enez Forteza, Sascha Husa, Lionel London,
Alessandro Nagar, Sebastiano Bernuzzi, Enno Harms, Mark Hannam, Sebastian
Khan, Michael P\"urrer, Geraint Pratten, Vivek Chaurasia | The most powerful astrophysical events: Gravitational-wave peak
luminosity of binary black holes as predicted by numerical relativity | Updated to match PRD version. 22 pages, 22 figures, 6 tables; data
and example implementations provided as supplementary material | Phys. Rev. D 96, 024006 (2017) | 10.1103/PhysRevD.96.024006 | LIGO-P1600279 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a brief moment, a binary black hole (BBH) merger can be the most powerful
astrophysical event in the visible universe. Here we present a model fit for
this gravitational-wave peak luminosity of nonprecessing quasicircular BBH
systems as a function of the masses and spins of the component black holes,
based on num... | [
{
"created": "Fri, 30 Dec 2016 19:29:07 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jul 2017 10:23:27 GMT",
"version": "v2"
}
] | 2017-07-19 | [
[
"Keitel",
"David",
""
],
[
"Forteza",
"Xisco Jiménez",
""
],
[
"Husa",
"Sascha",
""
],
[
"London",
"Lionel",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Harms",
"Enno",
""
],... | For a brief moment, a binary black hole (BBH) merger can be the most powerful astrophysical event in the visible universe. Here we present a model fit for this gravitational-wave peak luminosity of nonprecessing quasicircular BBH systems as a function of the masses and spins of the component black holes, based on numer... |
1602.06642 | Peng Huang | Peng Huang, Fang-Fang Yuan | Uniformly expanding vacuum: a possible interpretation of the dark energy | 5 pages, accepted by Physics of the Dark Universe | null | 10.1016/j.dark.2016.02.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following the spirit of the equivalence principle, we take a step further to
recognize the free fall of the observer as a method to eliminate causes that
would lead the perceived vacuum to change its original state. Thus, it is
expected that the vacuum should be in a rigid Minkowski state or be uniformly
expanding. B... | [
{
"created": "Mon, 22 Feb 2016 04:10:19 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Feb 2016 11:43:37 GMT",
"version": "v2"
}
] | 2016-02-24 | [
[
"Huang",
"Peng",
""
],
[
"Yuan",
"Fang-Fang",
""
]
] | Following the spirit of the equivalence principle, we take a step further to recognize the free fall of the observer as a method to eliminate causes that would lead the perceived vacuum to change its original state. Thus, it is expected that the vacuum should be in a rigid Minkowski state or be uniformly expanding. By ... |
gr-qc/0703141 | Antonio F. Ranada | J. Martin, Antonio F. Ranada and A. Tiemblo | On Mach's principle: Inertia as gravitation | 17 pages, 2 figures | null | null | null | gr-qc | null | In order to test the validity of Mach's principle, we calculate the action of
the entire universe on a test mass in its rest frame, which is an acceleration
${\bf g}^*$. We show the dependence of the inertia principle on the lapse and
the shift. Using the formalism of linearized gravitation, we obtain the
non-relativ... | [
{
"created": "Wed, 28 Mar 2007 17:30:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Martin",
"J.",
""
],
[
"Ranada",
"Antonio F.",
""
],
[
"Tiemblo",
"A.",
""
]
] | In order to test the validity of Mach's principle, we calculate the action of the entire universe on a test mass in its rest frame, which is an acceleration ${\bf g}^*$. We show the dependence of the inertia principle on the lapse and the shift. Using the formalism of linearized gravitation, we obtain the non-relativis... |
2311.04680 | Rabia Saleem | Xiao-Xiong Zeng, M. Israr Aslam, Rabia Saleem, Xin-Yun Hu | Holographic Einstein Rings of Black Holes in Scalar-Tensor-Vector
Gravity | 19 pages, 19 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | With the help of AdS/CFT correspondence, we analyze the holographic Einstein
images via the response function of the complex scalar field as a probe wave on
the AdS Schwarzschild scalar-tensor-vector gravity (STVG) black hole (BH). We
find that the amplitude of the response function $|\langle O\rangle|$ decreases
wit... | [
{
"created": "Wed, 8 Nov 2023 13:39:19 GMT",
"version": "v1"
}
] | 2023-11-09 | [
[
"Zeng",
"Xiao-Xiong",
""
],
[
"Aslam",
"M. Israr",
""
],
[
"Saleem",
"Rabia",
""
],
[
"Hu",
"Xin-Yun",
""
]
] | With the help of AdS/CFT correspondence, we analyze the holographic Einstein images via the response function of the complex scalar field as a probe wave on the AdS Schwarzschild scalar-tensor-vector gravity (STVG) black hole (BH). We find that the amplitude of the response function $|\langle O\rangle|$ decreases with ... |
gr-qc/0012065 | Robert T. Jantzen | Donato Bini, Robert T. Jantzen, Bahram Mashhoon | Gravitomagnetism and Relative Observer Clock Effects | 19 pages, LaTeX, IOP macros with package epsf and 1 eps figure, to
appear in Classical and Quantum Gravity, slight revision | Class.Quant.Grav. 18 (2001) 653-670 | 10.1088/0264-9381/18/4/306 | null | gr-qc | null | The gravitomagnetic clock effect and the Sagnac effect for circularly
rotating orbits in stationary axisymmetric spacetimes are studied from a
relative observer point of view, clarifying their relationships and the roles
played by special observer families. In particular Semer\'ak's recent
characterization of extreme... | [
{
"created": "Tue, 19 Dec 2000 00:15:36 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jan 2001 21:58:50 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Bini",
"Donato",
""
],
[
"Jantzen",
"Robert T.",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | The gravitomagnetic clock effect and the Sagnac effect for circularly rotating orbits in stationary axisymmetric spacetimes are studied from a relative observer point of view, clarifying their relationships and the roles played by special observer families. In particular Semer\'ak's recent characterization of extremely... |
1706.02962 | Orlando Luongo | Salvatore Capozziello, Rocco D'Agostino, Orlando Luongo | Model-independent reconstruction of $f(T)$ teleparallel cosmology | 11 pages, 8 figures | null | 10.1007/s10714-017-2304-x | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a model-independent formalism to numerically solve the modified
Friedmann equations in the framework of $f(T)$ teleparallel cosmology. Our
strategy is to expand the Hubble parameter around the redshift $z=0$ up to a
given order and to adopt cosmographic bounds as initial settings to determine
the correspon... | [
{
"created": "Fri, 9 Jun 2017 14:08:54 GMT",
"version": "v1"
}
] | 2017-11-01 | [
[
"Capozziello",
"Salvatore",
""
],
[
"D'Agostino",
"Rocco",
""
],
[
"Luongo",
"Orlando",
""
]
] | We propose a model-independent formalism to numerically solve the modified Friedmann equations in the framework of $f(T)$ teleparallel cosmology. Our strategy is to expand the Hubble parameter around the redshift $z=0$ up to a given order and to adopt cosmographic bounds as initial settings to determine the correspondi... |
1910.02854 | Rita Teixeira Da Costa | Rita Teixeira da Costa | Mode stability for the Teukolsky equation on extremal and subextremal
Kerr spacetimes | 71 pages, 3 figures | Communications in Mathematical Physics, 378(1), 705-781 (2020) | 10.1007/s00220-020-03796-z | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that there are no exponentially growing modes nor modes on the real
axis for the Teukolsky equation on Kerr black hole spacetimes, both in the
extremal and subextremal case. We also give a quantitative refinement of mode
stability. As an immediate application, we show that the transmission and
reflection coe... | [
{
"created": "Mon, 7 Oct 2019 15:29:59 GMT",
"version": "v1"
}
] | 2020-07-31 | [
[
"da Costa",
"Rita Teixeira",
""
]
] | We prove that there are no exponentially growing modes nor modes on the real axis for the Teukolsky equation on Kerr black hole spacetimes, both in the extremal and subextremal case. We also give a quantitative refinement of mode stability. As an immediate application, we show that the transmission and reflection coeff... |
1112.0360 | Tomasz Pawlowski | Tomasz Pawlowski, Abhay Ashtekar | Positive cosmological constant in loop quantum cosmology | 36 pages, 6 figures, RevTex4 | Phys. Rev. D 85, 064001 (2012) | 10.1103/PhysRevD.85.064001 | IGC-11/11-5 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The k=0 Friedmann Lemaitre Robertson Walker model with a positive
cosmological constant and a massless scalar field is analyzed in detail. If one
uses the scalar field as relational time, new features arise already in the
Hamiltonian framework of classical general relativity: In a finite interval of
relational time, ... | [
{
"created": "Thu, 1 Dec 2011 23:52:07 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Pawlowski",
"Tomasz",
""
],
[
"Ashtekar",
"Abhay",
""
]
] | The k=0 Friedmann Lemaitre Robertson Walker model with a positive cosmological constant and a massless scalar field is analyzed in detail. If one uses the scalar field as relational time, new features arise already in the Hamiltonian framework of classical general relativity: In a finite interval of relational time, th... |
1905.01904 | Nikolaos Chatzarakis | V.K. Oikonomou, N. Chatzarakis | The Phase Space of $k$-Essence $f(R)$ Gravity Theory | null | null | 10.1016/j.nuclphysb.2020.115023 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Among the remaining viable theories that can successfully describe the
late-time era is the $k$-Essence theory and in this work we study in detail the
phase space of $k$-Essence $f(R)$ gravity in vacuum. This theory can describe
in a viable way the inflationary era too, so we shall study the phase space in
detail, si... | [
{
"created": "Mon, 6 May 2019 09:52:01 GMT",
"version": "v1"
}
] | 2020-05-20 | [
[
"Oikonomou",
"V. K.",
""
],
[
"Chatzarakis",
"N.",
""
]
] | Among the remaining viable theories that can successfully describe the late-time era is the $k$-Essence theory and in this work we study in detail the phase space of $k$-Essence $f(R)$ gravity in vacuum. This theory can describe in a viable way the inflationary era too, so we shall study the phase space in detail, sinc... |
2210.03866 | Paul Ramond | Paul Ramond | Symplectic mechanics of relativistic spinning compact bodies I.:
Covariant foundations and integrability around black holes | 52 pages, 3 figures | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the motion of an extended body moving in a given
spacetime can be described by a particle on a (generally non-geodesic)
worldline. In first approximation, this worldline is a geodesic of the
underlying spacetime, and the resulting dynamics admit a covariant and
4-dimensional Hamiltonian formula... | [
{
"created": "Sat, 8 Oct 2022 01:15:47 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Oct 2022 20:55:21 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Feb 2023 07:37:44 GMT",
"version": "v3"
},
{
"created": "Fri, 2 Feb 2024 01:32:01 GMT",
"version": "v4"
}
] | 2024-02-05 | [
[
"Ramond",
"Paul",
""
]
] | In general relativity, the motion of an extended body moving in a given spacetime can be described by a particle on a (generally non-geodesic) worldline. In first approximation, this worldline is a geodesic of the underlying spacetime, and the resulting dynamics admit a covariant and 4-dimensional Hamiltonian formulati... |
gr-qc/0411148 | Laszlo B. Szabados | Laszlo B. Szabados | Quasi-local holography and quasi-local mass of classical fields in
Minkowski spacetime | 22 pages; reference added, typos corrected, discussion is improved;
appearing in Class. Q. Grav | Class.Quant.Grav. 22 (2005) 855-878 | 10.1088/0264-9381/22/5/007 | null | gr-qc | null | The 2-surface characterization of special classical radiative Higgs-,
Yang-Mills and linear zero-rest-mass (l.z.r.m) fields with any spin is
investigated. We determine all the zero quasi-local mass Higgs- and Yang-Mills
field configurations with compact semisimple gauge groups, and show that they
are plane waves (pro... | [
{
"created": "Tue, 30 Nov 2004 17:37:38 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jan 2005 14:52:23 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Szabados",
"Laszlo B.",
""
]
] | The 2-surface characterization of special classical radiative Higgs-, Yang-Mills and linear zero-rest-mass (l.z.r.m) fields with any spin is investigated. We determine all the zero quasi-local mass Higgs- and Yang-Mills field configurations with compact semisimple gauge groups, and show that they are plane waves (provi... |
1903.06329 | Florian Beyer | Florian Beyer and Leon Escobar and J\"org Frauendiener and Joshua
Ritchie | Numerical construction of initial data sets of binary black hole type
using a parabolic-hyperbolic formulation of the vacuum constraint equations | 36 pages, 8 figures. Matches the published version. Title and
abstract changed slightly. Introduction and discussion rewritten. Several
typos fixed. No change of the results or conclusions | Class. Quantum Grav. 36 175005 2019 | 10.1088/1361-6382/ab3482 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the parabolic-hyperbolic formulation of the
vacuum constraint equations introduced by R{\'a}cz with a view to constructing
multiple black hole initial data sets without spin. In order to respect the
natural properties of this configuration, we foliate the spatial domain with
2-spheres. It... | [
{
"created": "Fri, 15 Mar 2019 02:29:14 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2019 23:12:11 GMT",
"version": "v2"
}
] | 2019-08-12 | [
[
"Beyer",
"Florian",
""
],
[
"Escobar",
"Leon",
""
],
[
"Frauendiener",
"Jörg",
""
],
[
"Ritchie",
"Joshua",
""
]
] | In this paper we investigate the parabolic-hyperbolic formulation of the vacuum constraint equations introduced by R{\'a}cz with a view to constructing multiple black hole initial data sets without spin. In order to respect the natural properties of this configuration, we foliate the spatial domain with 2-spheres. It i... |
1608.06251 | Mahmood Roshan | Sara Jamali and Mahmood Roshan | The phase space analysis of modified gravity (MOG) | To appear in EPJC | Eur. Phys. J. C (2016) 76:490 | 10.1140/epjc/s10052-016-4336-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological consequences of a scalar-vector-tensor theory
of gravity known as MOG. In MOG, in addition to metric tensor, there are two
scalar fields $G(x)$ and $\mu(x)$, and one vector field $\phi_{\alpha}(x)$.
Using the phase space analysis, we explore the cosmological consequences of a
model of ... | [
{
"created": "Mon, 22 Aug 2016 18:16:51 GMT",
"version": "v1"
}
] | 2016-09-13 | [
[
"Jamali",
"Sara",
""
],
[
"Roshan",
"Mahmood",
""
]
] | We investigate the cosmological consequences of a scalar-vector-tensor theory of gravity known as MOG. In MOG, in addition to metric tensor, there are two scalar fields $G(x)$ and $\mu(x)$, and one vector field $\phi_{\alpha}(x)$. Using the phase space analysis, we explore the cosmological consequences of a model of MO... |
gr-qc/9607004 | Jerzy Kowalski-Glikman | A. B{\l}aut and J. Kowalski--Glikman (Institute for Theoretical
Physics, University of Wroc{\l}aw) | Algebra of Constraints and Solutions of Quantum Gravity | 15 pages, plain LaTeX | null | null | null | gr-qc | null | We construct the regularized Wheeler--De Witt operator demanding that the
algebra of constraints of quantum gravity is anomaly free. We find that for
only a small subset of all wavefunctions being integrals of scalar densities
this condition can be satisfied. It turns out that the resulting operator is
much simpler t... | [
{
"created": "Wed, 3 Jul 1996 11:48:28 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Błaut",
"A.",
"",
"Institute for Theoretical\n Physics, University of Wrocław"
],
[
"Kowalski--Glikman",
"J.",
"",
"Institute for Theoretical\n Physics, University of Wrocław"
]
] | We construct the regularized Wheeler--De Witt operator demanding that the algebra of constraints of quantum gravity is anomaly free. We find that for only a small subset of all wavefunctions being integrals of scalar densities this condition can be satisfied. It turns out that the resulting operator is much simpler tha... |
0804.3610 | Ivano Soares | R.F. Aranha, H.P. de Oliveira, I. Dami\~ao Soares and E.V. Tonini | The Efficiency of Gravitational Bremsstrahlung Production in the
Collision of Two Schwarzschild Black Holes | 16 pages, 4 figures, to appear in Int. J. Modern Phys. D (2008) | Int.J.Mod.Phys.D17:2049-2064,2008 | 10.1142/S0218271808013704 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the efficiency of gravitational bremsstrahlung production in the
process of head-on collision of two boosted Schwarzschild black holes. We
constructed initial data for the characteristic initial value problem in
Robinson-Trautman spacetimes, that represent two instantaneously stationary
Schwarzschild black... | [
{
"created": "Tue, 22 Apr 2008 21:26:14 GMT",
"version": "v1"
}
] | 2009-02-11 | [
[
"Aranha",
"R. F.",
""
],
[
"de Oliveira",
"H. P.",
""
],
[
"Soares",
"I. Damião",
""
],
[
"Tonini",
"E. V.",
""
]
] | We examine the efficiency of gravitational bremsstrahlung production in the process of head-on collision of two boosted Schwarzschild black holes. We constructed initial data for the characteristic initial value problem in Robinson-Trautman spacetimes, that represent two instantaneously stationary Schwarzschild black h... |
1501.04694 | Eduardo Gomez | Tonatiuh Matos and Eduardo Gomez | Space-Time Curvature Signatures in Bose-Einstein Condensates | 4 pages, no figures | null | 10.1140/epjd/e2015-60062-3 | null | gr-qc physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a generalized Gross-Pitaevski (GP) equation immersed on a
electromagnetic and a weak gravitational field starting from the covariant
Complex Klein-Gordon field in a curved space-time. We compare it with the GP
equation where the gravitational field is added by hand as an external
potential. We show that the... | [
{
"created": "Tue, 20 Jan 2015 01:49:24 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Matos",
"Tonatiuh",
""
],
[
"Gomez",
"Eduardo",
""
]
] | We derive a generalized Gross-Pitaevski (GP) equation immersed on a electromagnetic and a weak gravitational field starting from the covariant Complex Klein-Gordon field in a curved space-time. We compare it with the GP equation where the gravitational field is added by hand as an external potential. We show that there... |
0812.4037 | Remo Garattini | Remo Garattini | The induced Cosmological Constant as a tool for exploring geometries | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological constant induced by quantum fluctuation of the graviton on a
given background is considered as a tool for building a spectrum of different
geometries. In particular, we apply the method to the Schwarzschild background
with positive and negative mass parameter. In this way, we put on the same
level of... | [
{
"created": "Sun, 21 Dec 2008 16:15:48 GMT",
"version": "v1"
}
] | 2008-12-23 | [
[
"Garattini",
"Remo",
""
]
] | The cosmological constant induced by quantum fluctuation of the graviton on a given background is considered as a tool for building a spectrum of different geometries. In particular, we apply the method to the Schwarzschild background with positive and negative mass parameter. In this way, we put on the same level of c... |
gr-qc/0202093 | Steven L. Liebling | Steven L. Liebling | The Singularity Threshold of the Nonlinear Sigma Model Using 3D Adaptive
Mesh Refinement | 5 pages, 5 figures, 1 table; To be published in Phys. Rev. D.; Added
discussion of initial data; Added figure and references | Phys.Rev. D66 (2002) 041703 | 10.1103/PhysRevD.66.041703 | null | gr-qc hep-th math-ph math.MP | null | Numerical solutions to the nonlinear sigma model (NLSM), a wave map from 3+1
Minkowski space to S^3, are computed in three spatial dimensions (3D) using
adaptive mesh refinement (AMR). For initial data with compact support the model
is known to have two regimes, one in which regular initial data forms a
singularity a... | [
{
"created": "Tue, 26 Feb 2002 20:45:02 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Jun 2002 14:23:38 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Liebling",
"Steven L.",
""
]
] | Numerical solutions to the nonlinear sigma model (NLSM), a wave map from 3+1 Minkowski space to S^3, are computed in three spatial dimensions (3D) using adaptive mesh refinement (AMR). For initial data with compact support the model is known to have two regimes, one in which regular initial data forms a singularity and... |
1804.10042 | Hasan El Moumni | M. Chabab, H. El Moumni, S. Iraoui, K. Masmar, S. Zhizeh | Joule-Thomson Expansion of RN-AdS Black Holes in $f(R)$ gravity | 10 pages, 5 figures. Section 2 reviewed, typos corrected and some
references added | Letters in High Energy Physics 02, 05, 2018 | 10.31526/LHEP.2.2018.02 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study Joule-Thomson effects for charged AdS black holes in
$f(R)$ gravity. We obtain the inversion temperatures as well as inversion
curves, and investigate similarities and differences between van der Waals
fluids and charged AdS black holes in $f(R)$ gravity for this expansion. In
addition, we det... | [
{
"created": "Mon, 16 Apr 2018 20:19:53 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jun 2018 13:56:35 GMT",
"version": "v2"
}
] | 2018-09-11 | [
[
"Chabab",
"M.",
""
],
[
"Moumni",
"H. El",
""
],
[
"Iraoui",
"S.",
""
],
[
"Masmar",
"K.",
""
],
[
"Zhizeh",
"S.",
""
]
] | In this paper, we study Joule-Thomson effects for charged AdS black holes in $f(R)$ gravity. We obtain the inversion temperatures as well as inversion curves, and investigate similarities and differences between van der Waals fluids and charged AdS black holes in $f(R)$ gravity for this expansion. In addition, we deter... |
gr-qc/0609041 | Andrea Geralico | Donato Bini, Andrea Geralico, Remo Ruffini | Charged massive particle at rest in the field of a Reissner-Nordstr\"om
black hole | 42 pages, 3 eps figures, revtex macros | Phys.Rev.D75:044012,2007 | 10.1103/PhysRevD.75.044012 | null | gr-qc astro-ph | null | The interaction of a Reissner-Nordstr\"om black hole and a charged massive
particle is studied in the framework of perturbation theory. The particle
backreaction is taken into account, studying the effect of general static
perturbations of the hole following the approach of Zerilli. The solutions of
the combined Eins... | [
{
"created": "Tue, 12 Sep 2006 12:32:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Ruffini",
"Remo",
""
]
] | The interaction of a Reissner-Nordstr\"om black hole and a charged massive particle is studied in the framework of perturbation theory. The particle backreaction is taken into account, studying the effect of general static perturbations of the hole following the approach of Zerilli. The solutions of the combined Einste... |
gr-qc/0402092 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | Some encouraging and some cautionary remarks on Doubly Special
Relativity in Quantum Gravity | LaTex, 11 pages. Talk given at the ``10th Marcel Grossmann Meeting on
General Relativity" QG5 session, Rio de Janeiro, July 20-26, 2003 | null | 10.1142/9789812704030_0317 | null | gr-qc | null | The idea of a role for DSR (doubly-special relativity) in quantum gravity
finds some encouragement in a few scenarios, but in order to explore some key
conceptual issues it is necessary to find a well-understood toy-quantum-gravity
model that is fully compatible with the DSR principles. Perhaps the most
significant s... | [
{
"created": "Sun, 22 Feb 2004 20:16:08 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | The idea of a role for DSR (doubly-special relativity) in quantum gravity finds some encouragement in a few scenarios, but in order to explore some key conceptual issues it is necessary to find a well-understood toy-quantum-gravity model that is fully compatible with the DSR principles. Perhaps the most significant sou... |
2303.14755 | J. G. Cardoso | J. G. Cardoso | A Torsional Two-Component Description of the Motion of Dirac Particles
at Early Stages of the Cosmic Evolution | A reviewer has required that the article's organizational display
should be reset concisely. The modified version of the work has then been
accepted for publication in the International Journal of Theoretical Physics,
and it is the one currently exhibited herein | null | 10.1007/s10773-023-05502-w | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is assumed that the non-singular big-bang birth of the Universe as set
forth by Einstein-Cartan's theory particularly brought about the appearance of
the cosmic microwave and dark energy backgrounds, dark matter, gravitons as
well as of Dirac particles. On account of this assumption, a two-component
description of... | [
{
"created": "Sun, 26 Mar 2023 15:19:50 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2023 15:59:20 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Sep 2023 15:24:50 GMT",
"version": "v3"
},
{
"created": "Sat, 4 Nov 2023 12:38:10 GMT",
"version": "v4"
}
] | 2023-11-27 | [
[
"Cardoso",
"J. G.",
""
]
] | It is assumed that the non-singular big-bang birth of the Universe as set forth by Einstein-Cartan's theory particularly brought about the appearance of the cosmic microwave and dark energy backgrounds, dark matter, gravitons as well as of Dirac particles. On account of this assumption, a two-component description of t... |
2403.08263 | Parth Shah Dr. | Parth Shah, Gauranga C. Samanta, Kazuharu Bamba, R. Myrzakulov | Generic autonomous system approach to interacting dark energy models | 12 pages, 9 figures | Int.J.Geom.Meth.Mod.Phys. 20 (2023) 03, 2350042 | 10.1142/S0219887823500421 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore an autonomous system analysis of dark energy models with
interactions between dark energy and cold dark matter in a general systematic
approach to cosmological fluids. We investigate two types of models such as
local and non-local ones. In particular, a local form of interaction is
directly proportional to... | [
{
"created": "Wed, 13 Mar 2024 05:28:46 GMT",
"version": "v1"
}
] | 2024-03-14 | [
[
"Shah",
"Parth",
""
],
[
"Samanta",
"Gauranga C.",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Myrzakulov",
"R.",
""
]
] | We explore an autonomous system analysis of dark energy models with interactions between dark energy and cold dark matter in a general systematic approach to cosmological fluids. We investigate two types of models such as local and non-local ones. In particular, a local form of interaction is directly proportional to o... |
1208.5874 | Sabine Hossenfelder | S. Hossenfelder | A possibility to solve the problems with quantizing gravity | replaced with published version | Phys. Lett. B 725 (2013), pp. 473-476 | 10.1016/j.physletb.2013.07.037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally believed that quantum gravity is necessary to resolve the
known tensions between general relativity and the quantum field theories of the
standard model. Since perturbatively quantized gravity is non-renormalizable,
the problem how to unify all interactions in a common framework has been open
since th... | [
{
"created": "Wed, 29 Aug 2012 09:55:21 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Sep 2013 07:54:02 GMT",
"version": "v2"
}
] | 2013-09-05 | [
[
"Hossenfelder",
"S.",
""
]
] | It is generally believed that quantum gravity is necessary to resolve the known tensions between general relativity and the quantum field theories of the standard model. Since perturbatively quantized gravity is non-renormalizable, the problem how to unify all interactions in a common framework has been open since the ... |
1811.04858 | Ghulam Abbas | G. Abbas, H. Nazar | Complexity Factor For Anisotropic Source in Non-minimal Coupling Metric
$f(R)$ Gravity | 20 pages, 5 Figures, 1 Table, Accepted for Publication in Eur.
Physical Journal C | null | 10.1140/epjc/s10052-018-6430-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this outline we recognize the idea of complexity factor for static
anisotropic self-gravitating source with generalized $f(R)$ metric gravity
theory. In present consideration, we express the Einstein field equations,
hydrostatic equilibrium equation, the mass function and physical behavior of
$f(R)$ model by using... | [
{
"created": "Fri, 9 Nov 2018 07:13:55 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Abbas",
"G.",
""
],
[
"Nazar",
"H.",
""
]
] | In this outline we recognize the idea of complexity factor for static anisotropic self-gravitating source with generalized $f(R)$ metric gravity theory. In present consideration, we express the Einstein field equations, hydrostatic equilibrium equation, the mass function and physical behavior of $f(R)$ model by using s... |
gr-qc/0002046 | Ruben Gevorkian | A.M. Gevorkian, R. A. Gevorkian | Inertia in the Structure of Four-dimensional Space | LaTex, 10 pages | null | null | null | gr-qc | null | 1. Following Rimman, Minkowski and Einstein, for the first time equations of
the inert filed in the covariant form are found geometrically. 2.In the
approximation of a weak field for the first time the Law of Inertia in a
material space (as opposed to the absolute space) is received. A consequence is
the formulation ... | [
{
"created": "Mon, 14 Feb 2000 07:13:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gevorkian",
"A. M.",
""
],
[
"Gevorkian",
"R. A.",
""
]
] | 1. Following Rimman, Minkowski and Einstein, for the first time equations of the inert filed in the covariant form are found geometrically. 2.In the approximation of a weak field for the first time the Law of Inertia in a material space (as opposed to the absolute space) is received. A consequence is the formulation of... |
1701.01116 | Paolo Pani | Vitor Cardoso, Edgardo Franzin, Andrea Maselli, Paolo Pani, Guilherme
Raposo | Testing strong-field gravity with tidal Love numbers | 18 pages + appendices; 9 figures. v2: references updated and legend
of Fig.7 corrected; v3: clarifications and improvements in the discussion;
v4: minor changes to match the PRD version (selected as Editors' Suggestion) | Phys. Rev. D 95, 084014 (2017) | 10.1103/PhysRevD.95.084014 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tidal Love numbers (TLNs) encode the deformability of a self-gravitating
object immersed in a tidal environment and depend significantly both on the
object's internal structure and on the dynamics of the gravitational field. An
intriguing result in classical general relativity is the vanishing of the TLNs
of blac... | [
{
"created": "Wed, 4 Jan 2017 19:00:04 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jan 2017 18:48:21 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Mar 2017 09:09:38 GMT",
"version": "v3"
},
{
"created": "Wed, 12 Apr 2017 13:06:06 GMT",
"version": "v4"
}
] | 2017-04-13 | [
[
"Cardoso",
"Vitor",
""
],
[
"Franzin",
"Edgardo",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
],
[
"Raposo",
"Guilherme",
""
]
] | The tidal Love numbers (TLNs) encode the deformability of a self-gravitating object immersed in a tidal environment and depend significantly both on the object's internal structure and on the dynamics of the gravitational field. An intriguing result in classical general relativity is the vanishing of the TLNs of black ... |
gr-qc/9905080 | Pierre Teyssandier | P. Teyssandier | Superenergy tensors for a massive scalar field | 21 pages; submitted to Journal of Mathematical Physics | null | null | null | gr-qc | null | We define a general class of superenergy tensors of even rank 2(n+1) for a
real massive scalar field propagating in Minkowski spacetime. In the case where
n=1, we establish that this class is a two-parameter family, which reduces to a
unique tensor W(up to a constant factor) when the complete symmetry on the four
ind... | [
{
"created": "Thu, 20 May 1999 17:13:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Teyssandier",
"P.",
""
]
] | We define a general class of superenergy tensors of even rank 2(n+1) for a real massive scalar field propagating in Minkowski spacetime. In the case where n=1, we establish that this class is a two-parameter family, which reduces to a unique tensor W(up to a constant factor) when the complete symmetry on the four indic... |
1308.5212 | Leandro Gomes G | Leandro G. Gomes | General Solutions to Static Plane Symmetric Einstein's Equations | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general formula for the metric as an explicit function of the generic
energy-momentum tensor is given which satisfies static plane symmetric
Einstein's equations with cosmological constant.In order to illustrate it, the
solutions for the vacuum with cosmological constant, the perfect fluid with a
linear equation of... | [
{
"created": "Fri, 23 Aug 2013 19:12:18 GMT",
"version": "v1"
}
] | 2013-08-26 | [
[
"Gomes",
"Leandro G.",
""
]
] | A general formula for the metric as an explicit function of the generic energy-momentum tensor is given which satisfies static plane symmetric Einstein's equations with cosmological constant.In order to illustrate it, the solutions for the vacuum with cosmological constant, the perfect fluid with a linear equation of s... |
gr-qc/0201074 | Gennadi Sardanashvily | G.Sardanashvily | On the geometric foundation of classical gauge gravitation theory | 47 pages | null | null | null | gr-qc | null | A number of recent works in E-print arXiv have addressed the foundation of
gauge gravitation theory again. As is well known, differential geometry of
fibre bundles provides the adequate mathematical formulation of classical field
theory, including gauge theory on principal bundles. Gauge gravitation theory
is formula... | [
{
"created": "Tue, 22 Jan 2002 07:24:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sardanashvily",
"G.",
""
]
] | A number of recent works in E-print arXiv have addressed the foundation of gauge gravitation theory again. As is well known, differential geometry of fibre bundles provides the adequate mathematical formulation of classical field theory, including gauge theory on principal bundles. Gauge gravitation theory is formulate... |
1608.04359 | Abraham Harte | Abraham I. Harte and Justin Vines | Generating exact solutions to Einstein's equation using linearized
approximations | 13 pages, 1 figure. Corrected coefficients in Sect. VC | Phys. Rev. D 94, 084009 (2016) | 10.1103/PhysRevD.94.084009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that certain solutions to the linearized Einstein equation can---by
the application of a particular type of linearized gauge transformation---be
straightforwardly transformed into solutions of the exact Einstein equation. In
cases with nontrivial matter content, the exact stress-energy tensor of the
transform... | [
{
"created": "Mon, 15 Aug 2016 18:42:32 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Sep 2016 08:59:15 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Apr 2017 16:25:06 GMT",
"version": "v3"
}
] | 2017-04-14 | [
[
"Harte",
"Abraham I.",
""
],
[
"Vines",
"Justin",
""
]
] | We show that certain solutions to the linearized Einstein equation can---by the application of a particular type of linearized gauge transformation---be straightforwardly transformed into solutions of the exact Einstein equation. In cases with nontrivial matter content, the exact stress-energy tensor of the transformed... |
1008.5008 | Suman Ghosh | Suman Ghosh, Anirvan Dasgupta and Sayan Kar | Geodesic congruences in warped spacetimes | 18 pages, 5 figures, 2 Tables, published version | Phys.Rev.D83:084001,2011 | 10.1103/PhysRevD.83.084001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we explore the kinematics of timelike geodesic congruences
in warped five dimensional bulk spacetimes, with and without thick or thin
branes. Beginning with geodesic flows in the Randall--Sundrum AdS (Anti de
Sitter) geometry without and with branes we find analytical expressions for the
expansion sc... | [
{
"created": "Mon, 30 Aug 2010 05:47:01 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Oct 2010 06:18:08 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Apr 2011 05:00:41 GMT",
"version": "v3"
}
] | 2011-04-26 | [
[
"Ghosh",
"Suman",
""
],
[
"Dasgupta",
"Anirvan",
""
],
[
"Kar",
"Sayan",
""
]
] | In this article, we explore the kinematics of timelike geodesic congruences in warped five dimensional bulk spacetimes, with and without thick or thin branes. Beginning with geodesic flows in the Randall--Sundrum AdS (Anti de Sitter) geometry without and with branes we find analytical expressions for the expansion scal... |
2105.10876 | Quentin Henry | Quentin Henry, Guillaume Faye, Luc Blanchet | The current-type quadrupole moment and gravitational-wave mode
$(\ell,m)=(2,1)$ of compact binary systems at the third post-Newtonian order | 24 pages | null | 10.1088/1361-6382/ac1850 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Up to the third post-Newtonian (3PN) order, we compute (i) the current-type
quadrupole moment of (non-spinning) compact binary systems, as well as (ii) the
corresponding gravitational-wave mode $(2,1)$ (constituting a 3.5PN correction
in the waveform). Moreover, at this occasion, (iii) we recompute and confirm
the pr... | [
{
"created": "Sun, 23 May 2021 07:58:58 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2021 15:26:38 GMT",
"version": "v2"
}
] | 2021-09-22 | [
[
"Henry",
"Quentin",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Blanchet",
"Luc",
""
]
] | Up to the third post-Newtonian (3PN) order, we compute (i) the current-type quadrupole moment of (non-spinning) compact binary systems, as well as (ii) the corresponding gravitational-wave mode $(2,1)$ (constituting a 3.5PN correction in the waveform). Moreover, at this occasion, (iii) we recompute and confirm the prev... |
1601.07922 | Thomas Schucker | Sami R. ZouZou, Andre Tilquin, Thomas Schucker | Einstein-Cartan, Bianchi I and the Hubble Diagram | 11 pages, 1 figure | null | 10.1007/s10714-016-2050-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We try to solve the dark matter problem in the fit between theory and the
Hubble diagram of supernovae by allowing for torsion via Einstein-Cartan's
gravity and for anisotropy via the axial Bianchi I metric. Otherwise we are
conservative and admit only the cosmological constant and dust. The failure of
our model is q... | [
{
"created": "Wed, 27 Jan 2016 16:10:59 GMT",
"version": "v1"
}
] | 2016-04-13 | [
[
"ZouZou",
"Sami R.",
""
],
[
"Tilquin",
"Andre",
""
],
[
"Schucker",
"Thomas",
""
]
] | We try to solve the dark matter problem in the fit between theory and the Hubble diagram of supernovae by allowing for torsion via Einstein-Cartan's gravity and for anisotropy via the axial Bianchi I metric. Otherwise we are conservative and admit only the cosmological constant and dust. The failure of our model is qua... |
2303.04196 | Thanasis Karakasis | Thanasis Karakasis, George Koutsoumbas, Eleftherios Papantonopoulos | Motion of particles in a magnetically charged Euler-Heisenberg black
hole with scalar hair | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the geodesic motion of uncharged particles in the background of a
magnetically charged Euler-Heisenberg black hole with a scalar hair. The
spacetime can be asymptotically (A)dS or flat and we find, analysing the
behavior of the effective potential of the radial motion that in all cases
there exist stable and... | [
{
"created": "Tue, 7 Mar 2023 19:33:52 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Nov 2023 07:23:50 GMT",
"version": "v2"
}
] | 2023-11-06 | [
[
"Karakasis",
"Thanasis",
""
],
[
"Koutsoumbas",
"George",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We study the geodesic motion of uncharged particles in the background of a magnetically charged Euler-Heisenberg black hole with a scalar hair. The spacetime can be asymptotically (A)dS or flat and we find, analysing the behavior of the effective potential of the radial motion that in all cases there exist stable and u... |
2011.09665 | Yun Soo Myung | Yun Soo Myung, De-Cheng Zou | Scalarized black holes in the Einstein-Maxwell-scalar theory with a
quasi-topological term | 20 pages, 11 Figures, version to appear in PRD. arXiv admin note:
text overlap with arXiv:2009.05193 | Phys. Rev. D 103, 024010 (2021) | 10.1103/PhysRevD.103.024010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Einstein-Maxwell-scalar theory with a quasi-topological
term. Considering exponential couplings to Maxwell term, quasi-topological
term, and both terms, we obtain three sets of infinite scalarized charged black
holes by taking into account tachyonic instability of dyonic
Reissner-Nordstr\"{o}m blac... | [
{
"created": "Wed, 18 Nov 2020 04:27:25 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Dec 2020 03:54:33 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Myung",
"Yun Soo",
""
],
[
"Zou",
"De-Cheng",
""
]
] | We investigate the Einstein-Maxwell-scalar theory with a quasi-topological term. Considering exponential couplings to Maxwell term, quasi-topological term, and both terms, we obtain three sets of infinite scalarized charged black holes by taking into account tachyonic instability of dyonic Reissner-Nordstr\"{o}m black ... |
gr-qc/9307028 | Robert Mann | R.B. Mann and M.S. Morris | Classical Models of Subatomic Particles | 7 pgs | null | 10.1016/0375-9601(93)91146-V | null | gr-qc | null | We look at the program of modelling a subatomic particle---one having mass,
charge, and angular momentum---as an interior solution joined to a classical
general-relativistic Kerr-Newman exterior spacetime. We find that the
assumption of stationarity upon which the validity of the Kerr-Newman exterior
solution depends... | [
{
"created": "Wed, 21 Jul 1993 18:05:33 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Mann",
"R. B.",
""
],
[
"Morris",
"M. S.",
""
]
] | We look at the program of modelling a subatomic particle---one having mass, charge, and angular momentum---as an interior solution joined to a classical general-relativistic Kerr-Newman exterior spacetime. We find that the assumption of stationarity upon which the validity of the Kerr-Newman exterior solution depends i... |
1408.4679 | Sumanta Chakraborty | Sumanta Chakraborty and T. Padmanabhan | Evolution of Spacetime arises due to the departure from Holographic
Equipartition in all Lanczos-Lovelock Theories of Gravity | v2, References Modified | Phys. Rev. D 90 124017 (2014) | 10.1103/PhysRevD.90.124017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the case of general relativity one can interpret the Noether charge in any
bulk region as the heat content $TS$ of its boundary surface. Further, the time
evolution of spacetime metric in Einstein's theory arises due to the difference
$(N_{sur}-N_{bulk})$ of suitably defined surface and bulk degrees of freedom.
We... | [
{
"created": "Mon, 18 Aug 2014 20:51:50 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Dec 2014 08:43:47 GMT",
"version": "v2"
}
] | 2014-12-05 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Padmanabhan",
"T.",
""
]
] | In the case of general relativity one can interpret the Noether charge in any bulk region as the heat content $TS$ of its boundary surface. Further, the time evolution of spacetime metric in Einstein's theory arises due to the difference $(N_{sur}-N_{bulk})$ of suitably defined surface and bulk degrees of freedom. We s... |
0712.3758 | L\'aszl\'o \'A Gergely | Zolt\'an Keresztes, L\'aszl\'o \'A. Gergely | On the validity of the 5-dimensional Birkhoff theorem: The tale of an
exceptional case | 13 pages; v2: title amended, to be published in Classical and Quantum
Gravity | Class.Quant.Grav.25:165016,2008 | 10.1088/0264-9381/25/16/165016 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum
space-times containing spatial hypersurfaces with cosmological symmetries. This
theorem is violated by the 5d vacuum Gergely-Maartens (GM) space-time, which is
not a representant of the above class, but contains the static Einstein brane
as embedded... | [
{
"created": "Fri, 21 Dec 2007 18:00:50 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jun 2008 18:49:01 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Keresztes",
"Zoltán",
""
],
[
"Gergely",
"László Á.",
""
]
] | The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum space-times containing spatial hypersurfaces with cosmological symmetries. This theorem is violated by the 5d vacuum Gergely-Maartens (GM) space-time, which is not a representant of the above class, but contains the static Einstein brane as embedded h... |
2311.11586 | Deyou Chen | Deyou Chen, Jun Tao, Xuetao Yang | Attractive interactions in the microstructures of asymptotically flat
black holes | 17 pages, 3 figures | Physics of the Dark Universe, 42 (2023) 101379 | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we investigate the microstructure of asymptotically flat black
holes with Ruppeiner curvature. Specially, the cosmological constant is
considered to have a fluctuation around 0. Under such consideration, both
repulsive and attractive interactions are found in the Reissner-Nordstr\"om and
Kerr black hole... | [
{
"created": "Mon, 20 Nov 2023 07:51:48 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Chen",
"Deyou",
""
],
[
"Tao",
"Jun",
""
],
[
"Yang",
"Xuetao",
""
]
] | In this work, we investigate the microstructure of asymptotically flat black holes with Ruppeiner curvature. Specially, the cosmological constant is considered to have a fluctuation around 0. Under such consideration, both repulsive and attractive interactions are found in the Reissner-Nordstr\"om and Kerr black holes,... |
2211.13237 | Pierre-Henri Chavanis | Pierre-Henri Chavanis | Maximum mass of relativistic self-gravitating Bose-Einstein condensates
with repulsive or attractive $|\varphi|^4$ self-interaction | arXiv admin note: text overlap with arXiv:gr-qc/9801063 by other
authors | null | 10.1103/PhysRevD.107.103503 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an approximate analytical expression of the maximum mass of
relativistic self-gravitating Bose-Einstein condensates with repulsive or
attractive $|\varphi|^4$ self-interaction. This expression interpolates between
the general relativistic maximum mass of noninteracting bosons stars, the
general relativistic... | [
{
"created": "Wed, 23 Nov 2022 16:19:04 GMT",
"version": "v1"
}
] | 2023-05-17 | [
[
"Chavanis",
"Pierre-Henri",
""
]
] | We derive an approximate analytical expression of the maximum mass of relativistic self-gravitating Bose-Einstein condensates with repulsive or attractive $|\varphi|^4$ self-interaction. This expression interpolates between the general relativistic maximum mass of noninteracting bosons stars, the general relativistic m... |
1701.01162 | Gil de Oliveira-Neto | G. Oliveira-Neto and A. R. Vaz | Noncommutative cosmological model in the presence of a phantom fluid | 27 pages and 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study noncommutative classical Friedmann-Robertson-Walker cosmological
models. The constant curvature of the spatial sections can be positive ($k=1$),
negative ($k=-1$) or zero ($k=0$). The matter is represented by a perfect fluid
with negative pressure, phantom fluid, which satisfies the equation of state $p
=\al... | [
{
"created": "Wed, 4 Jan 2017 21:48:43 GMT",
"version": "v1"
}
] | 2017-01-06 | [
[
"Oliveira-Neto",
"G.",
""
],
[
"Vaz",
"A. R.",
""
]
] | We study noncommutative classical Friedmann-Robertson-Walker cosmological models. The constant curvature of the spatial sections can be positive ($k=1$), negative ($k=-1$) or zero ($k=0$). The matter is represented by a perfect fluid with negative pressure, phantom fluid, which satisfies the equation of state $p =\alph... |
gr-qc/0509075 | Martin Bojowald | Abhay Ashtekar and Martin Bojowald | Quantum geometry and the Schwarzschild singularity | 31 pages, 1 figure | Class.Quant.Grav.23:391-411,2006 | 10.1088/0264-9381/23/2/008 | IGPG-05-09/01, AEI-2005-132 | gr-qc | null | In homogeneous cosmologies, quantum geometry effects lead to a resolution of
the classical singularity without having to invoke special boundary conditions
at the singularity or introduce ad-hoc elements such as unphysical matter. The
same effects are shown to lead to a resolution of the Schwarzschild
singularity. Th... | [
{
"created": "Sun, 18 Sep 2005 20:04:23 GMT",
"version": "v1"
}
] | 2011-09-29 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Bojowald",
"Martin",
""
]
] | In homogeneous cosmologies, quantum geometry effects lead to a resolution of the classical singularity without having to invoke special boundary conditions at the singularity or introduce ad-hoc elements such as unphysical matter. The same effects are shown to lead to a resolution of the Schwarzschild singularity. The ... |
gr-qc/9711052 | Michael Reisenberger | Michael P. Reisenberger | A lattice worldsheet sum for 4-d Euclidean general relativity | 50 pages latex. 8 postscript figures. Uses psfig.sty | null | null | null | gr-qc | null | A lattice model for four dimensional Euclidean quantum general relativity is
proposed for a simplicial spacetime. It is shown how this model can be
expressed in terms of a sum over worldsheets of spin networks, and an
interpretation of these worldsheets as spacetime geometries is given, based on
the geometry defined ... | [
{
"created": "Mon, 17 Nov 1997 18:12:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Reisenberger",
"Michael P.",
""
]
] | A lattice model for four dimensional Euclidean quantum general relativity is proposed for a simplicial spacetime. It is shown how this model can be expressed in terms of a sum over worldsheets of spin networks, and an interpretation of these worldsheets as spacetime geometries is given, based on the geometry defined by... |
1812.10953 | Salvatore Capozziello | Habib Abedi, Amir M. Abbassi, and Salvatore Capozziello | Cosmological perturbations in gravitational energy-momentum complex | 10 pages, 6 figures | Annals of Physics 2019 | 10.1016/j.aop.2019.03.002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the energy-momentum of matter and gravitational field in the
framework of General Relativity and Teleparallel Gravity, we obtain the
energy-momentum complex in flat FRW spacetime. We show that the complex
vanishes at background level considering the various prescriptions, that is the
Einstein, M{\o}ller... | [
{
"created": "Fri, 28 Dec 2018 11:24:13 GMT",
"version": "v1"
}
] | 2019-04-02 | [
[
"Abedi",
"Habib",
""
],
[
"Abbassi",
"Amir M.",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | Starting from the energy-momentum of matter and gravitational field in the framework of General Relativity and Teleparallel Gravity, we obtain the energy-momentum complex in flat FRW spacetime. We show that the complex vanishes at background level considering the various prescriptions, that is the Einstein, M{\o}ller, ... |
gr-qc/0611051 | Enric Verdaguer | E. Verdaguer | Stochastic Gravity: Beyond Semiclassical Gravity | 12 pages, no figures, proceedings of the XXIX Spanish Relativity
Meeting | J.Phys.Conf.Ser.66:012006,2007 | 10.1088/1742-6596/66/1/012006 | null | gr-qc | null | The back-reaction of a classical gravitational field interacting with quantum
matter fields is described by the semiclassical Einstein equation, which has
the expectation value of the quantum matter fields stress tensor as a source.
The semiclassical theory may be obtained from the quantum field theory of
gravity int... | [
{
"created": "Wed, 8 Nov 2006 10:26:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Verdaguer",
"E.",
""
]
] | The back-reaction of a classical gravitational field interacting with quantum matter fields is described by the semiclassical Einstein equation, which has the expectation value of the quantum matter fields stress tensor as a source. The semiclassical theory may be obtained from the quantum field theory of gravity inter... |
1110.3872 | George Moutsopoulos | Yoshihiro Mitsuka and George Moutsopoulos | No more CKY two-forms in the NHEK | 36 pages, 12 pdf figures, v2: minor changes | Class. Quantum Grav. 29 (2012) 045004 | 10.1088/0264-9381/29/4/045004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in the near-horizon limit of a Kerr-NUT-AdS black hole, the
space of conformal Killing-Yano two-forms does not enhance and remains of
dimension two. The same holds for an analogous polar limit in the case of
extremal NUT charge. We also derive the conformal Killing-Yano $p$-form
equation for any backgrou... | [
{
"created": "Tue, 18 Oct 2011 04:32:13 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jan 2012 05:58:06 GMT",
"version": "v2"
}
] | 2012-02-01 | [
[
"Mitsuka",
"Yoshihiro",
""
],
[
"Moutsopoulos",
"George",
""
]
] | We show that in the near-horizon limit of a Kerr-NUT-AdS black hole, the space of conformal Killing-Yano two-forms does not enhance and remains of dimension two. The same holds for an analogous polar limit in the case of extremal NUT charge. We also derive the conformal Killing-Yano $p$-form equation for any background... |
gr-qc/0208073 | Gennadi Sardanashvily | G. Sardanashvily | Geometric quantization of relativistic Hamiltonian mechanics | 9 pages | Int.J.Theor.Phys. 42 (2003) 697-704 | null | null | gr-qc math-ph math.MP quant-ph | null | A relativistic Hamiltonian mechanical system is seen as a conservative Dirac
constraint system on the cotangent bundle of a pseudo-Riemannian manifold. We
provide geometric quantization of this cotangent bundle where the quantum
constraint serves as a relativistic quantum equation.
| [
{
"created": "Sun, 25 Aug 2002 09:27:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sardanashvily",
"G.",
""
]
] | A relativistic Hamiltonian mechanical system is seen as a conservative Dirac constraint system on the cotangent bundle of a pseudo-Riemannian manifold. We provide geometric quantization of this cotangent bundle where the quantum constraint serves as a relativistic quantum equation. |
0705.0845 | Otto Kong | Otto C. W. Kong (Nat'l Central U, Taiwan) | The Quantum World is an AdS_5 with the Quantum Relativity Symmetry
SO(2,4) | 10 pages of revtex, no figure;a largely rewritten presentation of the
same results | null | null | NCU-HEP-k028 | gr-qc hep-th | null | Quantum relativity as a generalized, or rather deformed, version of Einstein
relativity with a linear realization on a classical six-geometry beyond the
familiar setting of space-time offer a new framework to think about the quantum
space-time structure. The formulation requires two deformations to be
implemented thr... | [
{
"created": "Mon, 7 May 2007 03:34:32 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jan 2008 06:09:11 GMT",
"version": "v2"
}
] | 2011-11-09 | [
[
"Kong",
"Otto C. W.",
"",
"Nat'l Central U, Taiwan"
]
] | Quantum relativity as a generalized, or rather deformed, version of Einstein relativity with a linear realization on a classical six-geometry beyond the familiar setting of space-time offer a new framework to think about the quantum space-time structure. The formulation requires two deformations to be implemented throu... |
2301.03339 | Bahtiyar \"Ozg\"ur Sar{\i}o\u{g}lu | Okan G\"unel, Ulf Lindstr\"om, \"Ozg\"ur Sar{\i}o\u{g}lu | Killing-Yano charges of asymptotically maximally symmetric black holes | 15 pages, no figures; version 2: added 2 new references and a
clarifying note | Physics Letters B 839 (2023) 137784 | 10.1016/j.physletb.2023.137784 | UUITP-01/23 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct an asymptotic conserved charge for a current that has been
defined using Killing-Yano tensors. We then calculate the corresponding
conserved charges of of the Kerr and AdS-Kerr black holes, and their
higher-dimensional generalizations, Myers-Perry and Gibbons-L\"u-Page-Pope
black holes. The new charges a... | [
{
"created": "Mon, 9 Jan 2023 13:50:18 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jan 2023 13:50:38 GMT",
"version": "v2"
}
] | 2023-03-02 | [
[
"Günel",
"Okan",
""
],
[
"Lindström",
"Ulf",
""
],
[
"Sarıoğlu",
"Özgür",
""
]
] | We construct an asymptotic conserved charge for a current that has been defined using Killing-Yano tensors. We then calculate the corresponding conserved charges of of the Kerr and AdS-Kerr black holes, and their higher-dimensional generalizations, Myers-Perry and Gibbons-L\"u-Page-Pope black holes. The new charges all... |
1606.09217 | Ken-Ichi Nakao | Ryusuke Nishikawa, Ken-ichi Nakao, Atsuki Masuda, Yasusada Nambu and
Hideki Ishihara | Orbital angular momentum of scalar field generated by gravitational
scatterings | 20 pages, 6 figures | null | null | OCU-PHYS-451, AP-GR-132 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been expected that astronomical observations to detect the orbital
angular momenta of electromagnetic waves may give us a new insight into
astrophysics. Previous works pointed out the possibility that a rotating black
hole can produce orbital angular momenta of electromagnetic waves through
gravitational scatt... | [
{
"created": "Wed, 29 Jun 2016 18:50:19 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jun 2016 17:07:34 GMT",
"version": "v2"
}
] | 2016-07-01 | [
[
"Nishikawa",
"Ryusuke",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Masuda",
"Atsuki",
""
],
[
"Nambu",
"Yasusada",
""
],
[
"Ishihara",
"Hideki",
""
]
] | It has been expected that astronomical observations to detect the orbital angular momenta of electromagnetic waves may give us a new insight into astrophysics. Previous works pointed out the possibility that a rotating black hole can produce orbital angular momenta of electromagnetic waves through gravitational scatter... |
1001.2928 | Philipp Hoehn | Philipp A Hoehn and Susan M Scott | Encoding cosmological futures with conformal structures | 35 pages, 9 figures | Class. Quant. Grav. 26 (2009) 035019 | 10.1088/0264-9381/26/3/035019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quiescent cosmology and the Weyl curvature hypothesis possess a mathematical
framework, namely the definition of an Isotropic Singularity, but only for the
initial state of the universe. A complementary framework is necessary to also
encode appropriate cosmological futures. In order to devise a new framework we
analy... | [
{
"created": "Mon, 18 Jan 2010 17:10:00 GMT",
"version": "v1"
}
] | 2016-09-08 | [
[
"Hoehn",
"Philipp A",
""
],
[
"Scott",
"Susan M",
""
]
] | Quiescent cosmology and the Weyl curvature hypothesis possess a mathematical framework, namely the definition of an Isotropic Singularity, but only for the initial state of the universe. A complementary framework is necessary to also encode appropriate cosmological futures. In order to devise a new framework we analyse... |
1801.00350 | Ronald Gamble Jr | Ronald Gamble Jr, K. M. Flurchick | Viscoelastic Theory Representation Of Gravitational Strain Fields In The
${}^+\Lambda$-CDM Vacuum | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, investigations of gravitational interactions has led us to
discover new facets of the fundamental force. With these discoveries the
general theory of relativity is under greater scrutiny now than it was 100
years ago. Development of a more advanced theory is needed for experimental
tests and extensiv... | [
{
"created": "Sun, 31 Dec 2017 20:23:19 GMT",
"version": "v1"
}
] | 2018-01-03 | [
[
"Gamble",
"Ronald",
"Jr"
],
[
"Flurchick",
"K. M.",
""
]
] | In recent years, investigations of gravitational interactions has led us to discover new facets of the fundamental force. With these discoveries the general theory of relativity is under greater scrutiny now than it was 100 years ago. Development of a more advanced theory is needed for experimental tests and extensive ... |
1406.4092 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | Flare-out conditions in static thin-shell wormholes | 4 pages, 2 figures, final version to be published in PRD | Phys. Rev. D 90, 087501 (2014) | 10.1103/PhysRevD.90.087501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconsider the generalized flare-out conditions in static wormhole throats
given by Hochberg and Visser. We show that due to the presence of matter
sources on the throat, these conditions are not applicable to the thin-shell
wormholes.
| [
{
"created": "Thu, 12 Jun 2014 06:19:52 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Sep 2014 05:59:41 GMT",
"version": "v2"
}
] | 2014-10-14 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | We reconsider the generalized flare-out conditions in static wormhole throats given by Hochberg and Visser. We show that due to the presence of matter sources on the throat, these conditions are not applicable to the thin-shell wormholes. |
gr-qc/0507031 | Kayll Lake | Kayll Lake | Maximally extended, explicit and regular coverings of the Schwarzschild
- de Sitter vacua in arbitrary dimension | 12 pages revtex4 5 figures in color. Higher resolution version at
http://www.astro.queensu.ca/~lake/regularcoordinates.pdf | Class.Quant.Grav. 23 (2006) 5883-5895 | 10.1088/0264-9381/23/20/010 | null | gr-qc hep-th | null | Maximally extended, explicit and regular coverings of the Schwarzschild - de
Sitter family of vacua are given, first in spacetime (generalizing a result due
to Israel) and then for all dimensions $D$ (assuming a $D-2$ sphere). It is
shown that these coordinates offer important advantages over the well known
Kruskal -... | [
{
"created": "Thu, 7 Jul 2005 20:42:44 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jun 2006 17:45:39 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Lake",
"Kayll",
""
]
] | Maximally extended, explicit and regular coverings of the Schwarzschild - de Sitter family of vacua are given, first in spacetime (generalizing a result due to Israel) and then for all dimensions $D$ (assuming a $D-2$ sphere). It is shown that these coordinates offer important advantages over the well known Kruskal - S... |
gr-qc/0107034 | Robert C. Myers | Robert C. Myers | Black Holes and String Theory | LaTex, lectures given at the 4th Mexican School on Gravitation and
Mathematical Physics | Rev.Mex.Fis. 49S1 (2003) 14-18 | null | null | gr-qc | null | This is a short summary of my lectures given at the Fourth Mexican School on
Gravitation and Mathematical Physics. These lectures gave a brief introduction
to black holes in string theory, in which I primarily focussed on describing
some of the recent calculations of black hole entropy using the statistical
mechanics... | [
{
"created": "Tue, 10 Jul 2001 17:47:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Myers",
"Robert C.",
""
]
] | This is a short summary of my lectures given at the Fourth Mexican School on Gravitation and Mathematical Physics. These lectures gave a brief introduction to black holes in string theory, in which I primarily focussed on describing some of the recent calculations of black hole entropy using the statistical mechanics o... |
2312.07312 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola and Bastian Grez and Jose Perdiguero and
Aureliano Skirzewski | Inflationary scenarios in an effective polynomial affine model of
gravity | 13 pages, 4 figures | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper we inquire inflationary scenarios built on a simplified version
of the polynomial affine model of gravity. Given the absence of a metric tensor
in the formulation of the model, we build a \emph{kinetic term} contracting the
derivatives of scalar field with the most general $(2,0)$-tensor density build
u... | [
{
"created": "Tue, 12 Dec 2023 14:28:51 GMT",
"version": "v1"
}
] | 2023-12-13 | [
[
"Castillo-Felisola",
"Oscar",
""
],
[
"Grez",
"Bastian",
""
],
[
"Perdiguero",
"Jose",
""
],
[
"Skirzewski",
"Aureliano",
""
]
] | In this paper we inquire inflationary scenarios built on a simplified version of the polynomial affine model of gravity. Given the absence of a metric tensor in the formulation of the model, we build a \emph{kinetic term} contracting the derivatives of scalar field with the most general $(2,0)$-tensor density build usi... |
1010.3054 | Jo\~ao Paulo Pitelli Manoel | P.S. Letelier and J.P.M. Pitelli | n-Dimensional FLRW Quantum Cosmology | 12 pages, revtex, minor modifications | Phys.Rev.D82:104046,2010 | 10.1103/PhysRevD.82.104046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the formalism of quantum cosmology in a
Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe of arbitrary dimension
filled with a perfect fluid with $p=\alpha\rho$ equation of state. First we
show that the Schutz formalism, developed in four dimensions, can be extended
to a n-dimensional universe. We co... | [
{
"created": "Fri, 15 Oct 2010 00:34:43 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2011 23:56:46 GMT",
"version": "v2"
}
] | 2011-08-04 | [
[
"Letelier",
"P. S.",
""
],
[
"Pitelli",
"J. P. M.",
""
]
] | We introduce the formalism of quantum cosmology in a Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe of arbitrary dimension filled with a perfect fluid with $p=\alpha\rho$ equation of state. First we show that the Schutz formalism, developed in four dimensions, can be extended to a n-dimensional universe. We comp... |
2211.13120 | Suraj Prakash | Arpan Hait, Subhendra Mohanty, Suraj Prakash | Frequency space derivation of linear and non-linear memory gravitational
wave signals from eccentric binary orbits | 31 pages, 8 figures, version accepted for publication in Physical
Review D | null | 10.1103/PhysRevD.109.084037 | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | The memory effect in gravitational wave (GW) signals is the phenomenon,
wherein the relative position of two inertial GW detectors undergoes a
permanent displacement owing to the passage of GWs through them. Measurement of
the memory signal is an important target for future observations as it
establishes a connection... | [
{
"created": "Wed, 23 Nov 2022 16:59:31 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2023 10:28:04 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Apr 2024 10:59:16 GMT",
"version": "v3"
}
] | 2024-04-17 | [
[
"Hait",
"Arpan",
""
],
[
"Mohanty",
"Subhendra",
""
],
[
"Prakash",
"Suraj",
""
]
] | The memory effect in gravitational wave (GW) signals is the phenomenon, wherein the relative position of two inertial GW detectors undergoes a permanent displacement owing to the passage of GWs through them. Measurement of the memory signal is an important target for future observations as it establishes a connection b... |
gr-qc/9711007 | Ilja Schmelzer | Ilja Schmelzer | Realism And Empirical Evidence | 11 pages Latex, no figures | null | null | WIAS preprint No. 373 (ISSN 0946-8633) | gr-qc | null | We define realism using a slightly modified version of the EPR criterion of
reality. This version is strong enough to show that relativity is incomplete.
We show that this definition of realism is nonetheless compatible with the
general principles of causality and canonical quantum theory as well as with
experiment... | [
{
"created": "Tue, 4 Nov 1997 09:45:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schmelzer",
"Ilja",
""
]
] | We define realism using a slightly modified version of the EPR criterion of reality. This version is strong enough to show that relativity is incomplete. We show that this definition of realism is nonetheless compatible with the general principles of causality and canonical quantum theory as well as with experimental e... |
1703.02052 | Nima Khosravi | Nima Khosravi | \"Uber-Gravity and the Cosmological Constant Problem | 7 pages, 7 figures, match with accepted version, a comment on
Weinberg's no-go theorem has been added | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the idea of taking ensemble average over gravity models has been
introduced. Based on this idea, we study the ensemble average over
(effectively) all the gravity models (constructed from Ricci scalar) dubbing
the name \"uber-gravity which is a {\it{fixed point}} in the model space. The
\"uber-gravity has in... | [
{
"created": "Mon, 6 Mar 2017 19:00:05 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Mar 2017 13:39:33 GMT",
"version": "v2"
},
{
"created": "Tue, 29 May 2018 12:27:10 GMT",
"version": "v3"
}
] | 2018-05-30 | [
[
"Khosravi",
"Nima",
""
]
] | Recently, the idea of taking ensemble average over gravity models has been introduced. Based on this idea, we study the ensemble average over (effectively) all the gravity models (constructed from Ricci scalar) dubbing the name \"uber-gravity which is a {\it{fixed point}} in the model space. The \"uber-gravity has inte... |
gr-qc/0207034 | L. C. Garcia de Andrade | L.C.Garcia de Andrade | Energy spectra of spinning particles around spinning strings in
Einstein-Cartan gravity | Latex file | null | null | null | gr-qc | null | Riemannian Killing conserved currents are used to find the energy spectra of
classical spinning particles moving around a spinning string in Einstein-Cartan
(EC) theory of gravity. It is shown that a continuos spectrum is obtained for
planar open orbits the energy shift between the upper and lower bounds obtained
for... | [
{
"created": "Sun, 7 Jul 2002 05:30:03 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jul 2002 08:49:41 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Riemannian Killing conserved currents are used to find the energy spectra of classical spinning particles moving around a spinning string in Einstein-Cartan (EC) theory of gravity. It is shown that a continuos spectrum is obtained for planar open orbits the energy shift between the upper and lower bounds obtained for c... |
gr-qc/9311034 | Gilles Esposito-Farese | Thibault Damour and Gilles Esposito-Farese | Testing for Preferred-Frame Effects in Gravity with Artificial Earth
Satellites | 24 pages + 4 figures, IHES/P/93/48 and CPT-93/P.2941 | Phys.Rev.D49:1693-1706,1994 | 10.1103/PhysRevD.49.1693 | null | gr-qc | null | As gravity is a long-range force, one might a priori expect the Universe's
global matter distribution to select a preferred rest frame for local
gravitational physics. At the post-Newtonian approximation, two parameters
suffice to describe the phenomenology of preferred-frame effects. One of them
has already been ver... | [
{
"created": "Mon, 29 Nov 1993 19:20:52 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Damour",
"Thibault",
""
],
[
"Esposito-Farese",
"Gilles",
""
]
] | As gravity is a long-range force, one might a priori expect the Universe's global matter distribution to select a preferred rest frame for local gravitational physics. At the post-Newtonian approximation, two parameters suffice to describe the phenomenology of preferred-frame effects. One of them has already been very ... |
gr-qc/9709034 | James L. Anderson | James L. Anderson | Thompson Scattering in an Expanding Universe | 4 pages | null | null | null | gr-qc | null | The Thompson cross section for scattering of electromagnetic waves by a free
electron in an expanding universe is derived here. The equations of motion of
the electron are obtained using the Einstein-Infeld-Hoffmann (EIH) surface
integral method. These integrals are evaluated approximately by perturbing off
an Einste... | [
{
"created": "Sun, 14 Sep 1997 20:48:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anderson",
"James L.",
""
]
] | The Thompson cross section for scattering of electromagnetic waves by a free electron in an expanding universe is derived here. The equations of motion of the electron are obtained using the Einstein-Infeld-Hoffmann (EIH) surface integral method. These integrals are evaluated approximately by perturbing off an Einstein... |
gr-qc/9412049 | Heinz-Dieter Conradi | Heinz-Dieter Conradi (RWTH Aachen, Germany) | Quantum Cosmology of Kantowski-Sachs like Models | 21 pages, uses LaTeX2e, epsf.sty and float.sty, three figures (50
kb); changes: one figure added, new interpretation of quantizing procedure
for the joined model and many minor changes | Class.Quant.Grav. 12 (1995) 2423-2440 | 10.1088/0264-9381/12/10/005 | PHITA 94/64 | gr-qc | null | The Wheeler-DeWitt equation for a class of Kantowski-Sachs like models is
completely solved. The generalized models include the Kantowski-Sachs model
with cosmological constant and pressureless dust. Likewise contained is a
joined model which consists of a Kantowski-Sachs cylinder inserted between two
FRW half--spher... | [
{
"created": "Mon, 19 Dec 1994 15:57:07 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Dec 1994 12:27:45 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Jul 1995 17:07:49 GMT",
"version": "v3"
}
] | 2009-10-22 | [
[
"Conradi",
"Heinz-Dieter",
"",
"RWTH Aachen, Germany"
]
] | The Wheeler-DeWitt equation for a class of Kantowski-Sachs like models is completely solved. The generalized models include the Kantowski-Sachs model with cosmological constant and pressureless dust. Likewise contained is a joined model which consists of a Kantowski-Sachs cylinder inserted between two FRW half--spheres... |
1505.07841 | Barry Wardell | Barry Wardell and Niels Warburton | Applying the effective-source approach to frequency-domain self-force
calculations: Lorenz-gauge gravitational perturbations | Several typos corrected, including some that were identified in the
published version | Phys. Rev. D 92, 084019 (2015) | 10.1103/PhysRevD.92.084019 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With a view to developing a formalism that will be applicable at second
perturbative order, we devise a new practical scheme for computing the
gravitational self-force experienced by a point mass moving in a curved
background spacetime. Our method works in the frequency domain and employs the
effective-source approac... | [
{
"created": "Thu, 28 May 2015 20:02:14 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2015 21:53:01 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Jun 2021 13:07:30 GMT",
"version": "v3"
}
] | 2021-06-14 | [
[
"Wardell",
"Barry",
""
],
[
"Warburton",
"Niels",
""
]
] | With a view to developing a formalism that will be applicable at second perturbative order, we devise a new practical scheme for computing the gravitational self-force experienced by a point mass moving in a curved background spacetime. Our method works in the frequency domain and employs the effective-source approach,... |
2302.13637 | Pradip Kumar Chattopadhyay Dr. | B. Das, K. B. Goswami, A. Saha, P. K. Chattopadhyay | Maximum mass and radius of strange stars in Finch-Skea geometry in
dimensions $D\geq4$ | 36 pages, 31 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this article, we demonstrated a stellar model for compact star in presence
of strange matter embedded in $D\ge4$ dimensional space-time defind by
Finch-Skea metric. To study the relevant physical properties of the interior
matter, we consider the equation of state $(henceforth~EOS)$ as proposed in MIT
bag model gi... | [
{
"created": "Mon, 27 Feb 2023 10:05:30 GMT",
"version": "v1"
}
] | 2023-02-28 | [
[
"Das",
"B.",
""
],
[
"Goswami",
"K. B.",
""
],
[
"Saha",
"A.",
""
],
[
"Chattopadhyay",
"P. K.",
""
]
] | In this article, we demonstrated a stellar model for compact star in presence of strange matter embedded in $D\ge4$ dimensional space-time defind by Finch-Skea metric. To study the relevant physical properties of the interior matter, we consider the equation of state $(henceforth~EOS)$ as proposed in MIT bag model give... |
1211.3837 | Luca Fabbri | Luca Fabbri | Weakly-Interacting Massive Particles in Torsionally-Gravitating Dirac
Theory | 11 pages | Int.J.Mod.Phys.D22:1350071,2013 | 10.1142/S0218271813500715 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We shall consider the problem of Dark Matter in torsion gravity with Dirac
matter fields; we will consider the fact that if WIMPs in a bath are allowed to
form condensates then torsional effects may be relevant even at galactic
scales: we show that torsionally-gravitating Dirac fields have interesting
properties for ... | [
{
"created": "Fri, 16 Nov 2012 09:31:19 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2013 19:43:55 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Jul 2013 19:22:09 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Dec 2016 13:49:26 GMT",
"version": "v4"
}
] | 2016-12-21 | [
[
"Fabbri",
"Luca",
""
]
] | We shall consider the problem of Dark Matter in torsion gravity with Dirac matter fields; we will consider the fact that if WIMPs in a bath are allowed to form condensates then torsional effects may be relevant even at galactic scales: we show that torsionally-gravitating Dirac fields have interesting properties for th... |
1106.5380 | Maarten van de Meent | Maarten van de Meent | Exact Piecewise Flat Gravitational Waves | null | Class. Quantum Grav. 28 (2011) 245006 | 10.1088/0264-9381/28/24/245006 | ITP-UU-11/22 SPIN-11/17 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize our previous linear result [1] in obtaining gravitational waves
from our piecewise flat model for gravity in 3+1 dimensions to exact piecewise
flat configurations describing exact planar gravitational waves. We show
explicitly how to construct a piecewise flat spacetime that describes an
impulsive plane... | [
{
"created": "Mon, 27 Jun 2011 12:52:39 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Nov 2011 16:26:03 GMT",
"version": "v2"
}
] | 2011-11-28 | [
[
"van de Meent",
"Maarten",
""
]
] | We generalize our previous linear result [1] in obtaining gravitational waves from our piecewise flat model for gravity in 3+1 dimensions to exact piecewise flat configurations describing exact planar gravitational waves. We show explicitly how to construct a piecewise flat spacetime that describes an impulsive plane w... |
1102.4109 | Y. Jack Ng | Y. Jack Ng | Various Facets of Spacetime Foam | 16 pages, PDFLaTeX; to appear in the Proceedings of the Third
Conference on Time and Matter, edited by Martin O'Loughlin et al | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetime foam manifests itself in a variety of ways. It has some attributes
of a turbulent fluid. It is the source of the holographic principle.
Cosmologically it may play a role in explaining why the energy density has the
critical value, why dark energy/matter exists, and why the effective dynamical
cosmological c... | [
{
"created": "Sun, 20 Feb 2011 23:14:40 GMT",
"version": "v1"
}
] | 2011-02-24 | [
[
"Ng",
"Y. Jack",
""
]
] | Spacetime foam manifests itself in a variety of ways. It has some attributes of a turbulent fluid. It is the source of the holographic principle. Cosmologically it may play a role in explaining why the energy density has the critical value, why dark energy/matter exists, and why the effective dynamical cosmological con... |
1807.07587 | Fulvio Melia | Fulvio Melia | The Apparent (Gravitational) Horizon in Cosmology | 24 pages, 1 figure. Accepted for publication in AJP | American Journal of Physics 86, 585 (2018) | 10.1119/1.5045333 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, a gravitational horizon (more commonly known as the
"apparent horizon") is an imaginary surface beyond which all null geodesics
recede from the observer. The Universe has an apparent (gravitational) horizon,
but unlike its counterpart in the Schwarzschild and Kerr metrics, it is not
static. It ... | [
{
"created": "Thu, 19 Jul 2018 18:02:33 GMT",
"version": "v1"
}
] | 2018-09-19 | [
[
"Melia",
"Fulvio",
""
]
] | In general relativity, a gravitational horizon (more commonly known as the "apparent horizon") is an imaginary surface beyond which all null geodesics recede from the observer. The Universe has an apparent (gravitational) horizon, but unlike its counterpart in the Schwarzschild and Kerr metrics, it is not static. It ma... |
1311.6766 | David Delphenich | D. H. Delphenich | Line geometry and electromagnetism II: wave motion | 31 pages, continuation of previous paper | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fundamental role of line geometry in the study of wave motion is first
introduced in the general context by way of the tangent planes to the
instantaneous wave surfaces, in which it is first observed that the possible
frequency-wave number 1-forms are typically constrained by a dispersion law
that is derived from... | [
{
"created": "Tue, 26 Nov 2013 18:37:55 GMT",
"version": "v1"
}
] | 2013-11-27 | [
[
"Delphenich",
"D. H.",
""
]
] | The fundamental role of line geometry in the study of wave motion is first introduced in the general context by way of the tangent planes to the instantaneous wave surfaces, in which it is first observed that the possible frequency-wave number 1-forms are typically constrained by a dispersion law that is derived from a... |
1809.02764 | Peter Collas | Peter Collas and David Klein | The Dirac equation in general relativity, a guide for calculations | 59 pages | Springer Briefs in Physics, Quantum Physics 2019 | 10.1007/978-3-030-14825-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In these informal lecture notes we outline different approaches used in doing
calculations involving the Dirac equation in curved spacetime. We have tried to
clarify the subject by carefully pointing out the various conventions used and
by including several examples from textbooks and the existing literature. In
addi... | [
{
"created": "Sat, 8 Sep 2018 05:55:17 GMT",
"version": "v1"
}
] | 2019-03-26 | [
[
"Collas",
"Peter",
""
],
[
"Klein",
"David",
""
]
] | In these informal lecture notes we outline different approaches used in doing calculations involving the Dirac equation in curved spacetime. We have tried to clarify the subject by carefully pointing out the various conventions used and by including several examples from textbooks and the existing literature. In additi... |
2205.00391 | Chen Songbai | Xueyao Liu, Songbai Chen, Jiliang Jing | Polarization distribution in the image of a synchrotron emitting ring
around a regular black hole | 17 pages, 8 figures, Accepted by Sci. China-Phys. Mech. Astron | Sci. China Phys. Mech. Astron. 65, 120411(2022) | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polarized images of a synchrotron emitting ring are studied in the
regular Hayward and Bardeen black hole spacetimes. These regular black holes
carry a magnetic field in terms of gravity coupled to nonlinear
electrodynamics. Results show that the main features of the polarization images
of the emitting rings are ... | [
{
"created": "Sun, 1 May 2022 04:02:38 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jun 2022 09:18:19 GMT",
"version": "v2"
}
] | 2023-12-27 | [
[
"Liu",
"Xueyao",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | The polarized images of a synchrotron emitting ring are studied in the regular Hayward and Bardeen black hole spacetimes. These regular black holes carry a magnetic field in terms of gravity coupled to nonlinear electrodynamics. Results show that the main features of the polarization images of the emitting rings are si... |
gr-qc/0011020 | Mauricio Bellini | Mauricio Bellini (Universidad Nacional de Mar del Plata) | Inflation and nonequilibrium thermodynamics for the fluctuations in the
infrared sector | Accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.63.087301 | null | gr-qc | null | In the framework of inflationary cosmology I study some aspects of
nonequilibrium thermodynamics for the matter field fluctuations. The
thermodynamic analysis is developed for de Sitter and power - law expansions of
the universe. In both cases, I find that the heat capacity is negative leading
respectively, to expone... | [
{
"created": "Mon, 6 Nov 2000 18:02:53 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2000 13:44:02 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Bellini",
"Mauricio",
"",
"Universidad Nacional de Mar del Plata"
]
] | In the framework of inflationary cosmology I study some aspects of nonequilibrium thermodynamics for the matter field fluctuations. The thermodynamic analysis is developed for de Sitter and power - law expansions of the universe. In both cases, I find that the heat capacity is negative leading respectively, to exponent... |
gr-qc/0205041 | Hisaaki Shinkai | Hisa-aki Shinkai and Sean A. Hayward | Fate of the first traversible wormhole: black-hole collapse or
inflationary expansion | 10 pages, RevTeX4, 11 figures, epsf.sty | Phys.Rev. D66 (2002) 044005 | 10.1103/PhysRevD.66.044005 | null | gr-qc | null | We study numerically the stability of Morris & Thorne's first traversible
wormhole, shown previously by Ellis to be a solution for a massless ghost
Klein-Gordon field. Our code uses a dual-null formulation for spherically
symmetric space-time integration, and the numerical range covers both universes
connected by the... | [
{
"created": "Fri, 10 May 2002 13:10:20 GMT",
"version": "v1"
},
{
"created": "Sat, 11 May 2002 01:26:56 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Shinkai",
"Hisa-aki",
""
],
[
"Hayward",
"Sean A.",
""
]
] | We study numerically the stability of Morris & Thorne's first traversible wormhole, shown previously by Ellis to be a solution for a massless ghost Klein-Gordon field. Our code uses a dual-null formulation for spherically symmetric space-time integration, and the numerical range covers both universes connected by the w... |
1510.06860 | Kimet Jusufi | Kimet Jusufi | Scalar particles emission from black holes with topological defects
using Hamilton-Jacobi method | null | Astrophysics and Space Science, Manuscript number:
ASTR-D-15-00451R1, 2015 | 10.1007/s10509-015-2537-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quantum tunneling of charged and uncharged scalar particles from the
event horizon of Schwarzschild-de Sitter and Reissner-Nordstr\"{o}m-de Sitter
black holes pierced by an infinitely long spinning cosmic string and a global
monopole. In order to find the Hawking temperature and the tunneling
probability we ... | [
{
"created": "Fri, 23 Oct 2015 09:08:35 GMT",
"version": "v1"
}
] | 2015-10-26 | [
[
"Jusufi",
"Kimet",
""
]
] | We study quantum tunneling of charged and uncharged scalar particles from the event horizon of Schwarzschild-de Sitter and Reissner-Nordstr\"{o}m-de Sitter black holes pierced by an infinitely long spinning cosmic string and a global monopole. In order to find the Hawking temperature and the tunneling probability we so... |
gr-qc/9506088 | null | Giampiero Esposito | Mathematical Structures of Space-Time | 63 pages, plain-tex, published in Fortschritte der Physik, volume 40,
pages 1-30, year 1992 | Fortschr.Phys.40:1-30,1992 | 10.1002/prop.2190400102 | DAMTP R-90/5 | gr-qc | null | At first we introduce the space-time manifold and we compare some aspects of
Riemannian and Lorentzian geometry such as the distance function and the
relations between topology and curvature. We then define spinor structures in
general relativity, and the conditions for their existence are discussed. The
causality co... | [
{
"created": "Sat, 1 Jul 1995 19:30:43 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Esposito",
"Giampiero",
""
]
] | At first we introduce the space-time manifold and we compare some aspects of Riemannian and Lorentzian geometry such as the distance function and the relations between topology and curvature. We then define spinor structures in general relativity, and the conditions for their existence are discussed. The causality cond... |
gr-qc/9409028 | null | Lajos Diosi | On maximum number of decoherent histories | 5 pages LaTeX (2nd version, new ref. included) | Phys.Lett. 203A (1995) 267-268 | 10.1016/0375-9601(95)00440-E | null | gr-qc | null | It is shown that $N^2$ is the upper limit for the number of histories in a
decohering family of $N$-state quantum system. Simple criterion is found for a
family of $N^2$ fine grained decohering histories of Gell-Mann and Hartle to be
identical with a family of Griffiths' consistent quantum trajectories.
| [
{
"created": "Wed, 14 Sep 1994 11:27:00 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Oct 1994 14:44:00 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Oct 1994 14:49:00 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Diosi",
"Lajos",
""
]
] | It is shown that $N^2$ is the upper limit for the number of histories in a decohering family of $N$-state quantum system. Simple criterion is found for a family of $N^2$ fine grained decohering histories of Gell-Mann and Hartle to be identical with a family of Griffiths' consistent quantum trajectories. |
1007.5500 | Sanjeev S. Seahra | Golam Mortuza Hossain, Viqar Husain, Sanjeev S. Seahra | The propagator in polymer quantum field theory | 5 pages, 1 figure, clarified discussion of boundary conditions,
improved figure, matches version published in PRD | Phys.Rev.D82:124032,2010 | 10.1103/PhysRevD.82.124032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study free scalar field theory on flat spacetime using a background
independent (polymer) quantization procedure. Specifically we compute the
propagator using a method that takes the energy spectrum and position matrix
elements of the harmonic oscillator as inputs. We obtain closed form results in
the infrared and... | [
{
"created": "Fri, 30 Jul 2010 17:24:24 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2011 15:45:14 GMT",
"version": "v2"
}
] | 2011-03-24 | [
[
"Hossain",
"Golam Mortuza",
""
],
[
"Husain",
"Viqar",
""
],
[
"Seahra",
"Sanjeev S.",
""
]
] | We study free scalar field theory on flat spacetime using a background independent (polymer) quantization procedure. Specifically we compute the propagator using a method that takes the energy spectrum and position matrix elements of the harmonic oscillator as inputs. We obtain closed form results in the infrared and u... |
1703.09663 | Burin Gumjudpai | Somphoach Saichaemchan (IF Naresuan) and Burin Gumjudpai (IF Naresuan) | Non-minimal derivative coupling in Palatini cosmology: acceleration in
chaotic inflation potential | 7 pages, 1 figure, extended content of the version to appear in
Journal of Physics Conference Series (Proceedings of the 12th Siam Physics
Congress (2017)) | Journal of Physics: Conference Series (2017) 901 : 012010 | 10.1088/1742-6596/901/1/012010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | NMDC-Palatini cosmology in slow-roll regime is of our interests. We present
flat FLRW cosmological NMDC-Palatini field equations and acceleration
condition. Late time trajectory is approximated. Chaotic inflation potential is
considered here as it is viable in a range of positive coupling constant as
constrained by C... | [
{
"created": "Tue, 28 Mar 2017 16:39:49 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jun 2017 10:46:16 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Jul 2017 10:27:09 GMT",
"version": "v3"
},
{
"created": "Mon, 21 Aug 2017 16:40:56 GMT",
"version": "v4"
}
] | 2017-12-27 | [
[
"Saichaemchan",
"Somphoach",
"",
"IF Naresuan"
],
[
"Gumjudpai",
"Burin",
"",
"IF Naresuan"
]
] | NMDC-Palatini cosmology in slow-roll regime is of our interests. We present flat FLRW cosmological NMDC-Palatini field equations and acceleration condition. Late time trajectory is approximated. Chaotic inflation potential is considered here as it is viable in a range of positive coupling constant as constrained by CMB... |
1904.05954 | Nan Jiang | Nan Jiang, Kent Yagi | Improved Analytic Modeling of Neutron Star Interiors | 10 pages, 6 figures There is a modification of central density in the
caption of FIG.1. Some typos in Table 3 are fixed | Phys. Rev. D 99, 124029 (2019) | 10.1103/PhysRevD.99.124029 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Studies of neutron stars are extremely timely given the recent detection of
gravitational waves from a binary neutron star merger GW170817, and an
International Space Station payload NICER currently in operation that aims to
determine radii of neutron stars to a precision better than 5%. In many cases,
neutron star s... | [
{
"created": "Thu, 11 Apr 2019 21:02:30 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2019 18:30:55 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Apr 2019 21:27:37 GMT",
"version": "v3"
}
] | 2019-06-26 | [
[
"Jiang",
"Nan",
""
],
[
"Yagi",
"Kent",
""
]
] | Studies of neutron stars are extremely timely given the recent detection of gravitational waves from a binary neutron star merger GW170817, and an International Space Station payload NICER currently in operation that aims to determine radii of neutron stars to a precision better than 5%. In many cases, neutron star sol... |
gr-qc/9602055 | Robert Geroch | Robert Geroch (University of Chicago) | Partial Differential Equations of Physics | 57 pages Latex, 0 figures | null | null | null | gr-qc | null | Apparently, all partial differential equations that describe physical
phenomena in space-time can be cast into a universal quasilinear, first-order
form. In this paper, we do two things. First, we describe some broad features
of systems of differential equations so formulated. Examples of such features
include hyperb... | [
{
"created": "Tue, 27 Feb 1996 20:24:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Geroch",
"Robert",
"",
"University of Chicago"
]
] | Apparently, all partial differential equations that describe physical phenomena in space-time can be cast into a universal quasilinear, first-order form. In this paper, we do two things. First, we describe some broad features of systems of differential equations so formulated. Examples of such features include hyperbol... |
gr-qc/0402122 | Claus Lammerzahl | Claus Laemmerzahl | General Relativity in Space and Sensitive Tests of the Equivalence
Principle | 19 pages, Latex, summary talk of the session ''General Relativity in
Space and Sensitive Tests of the Equivalence Principle'' at the 10th Marcel
Grossmann Meeting, Rio, July 2003 | null | 10.1142/9789812704030_0024 | null | gr-qc | null | An introduction into the fundamental quests addressed in space missions is
given. These quests are the exploration of the relativistic gravitational
field, the Universality of Free Fall, the Universality of the Gravitational
Redshift, Local Lorentz Invariance, the validity of Einstein's field equations,
etc. In each ... | [
{
"created": "Thu, 26 Feb 2004 21:06:50 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Laemmerzahl",
"Claus",
""
]
] | An introduction into the fundamental quests addressed in space missions is given. These quests are the exploration of the relativistic gravitational field, the Universality of Free Fall, the Universality of the Gravitational Redshift, Local Lorentz Invariance, the validity of Einstein's field equations, etc. In each ca... |
gr-qc/0111018 | Rafael A. Vera | Rafael A. Vera | Fundamental Disagreements of Experiments with Theories on Gravitation
and Cosmology | 20 pages Latex. Article sent for publication in International Journal
of Modern Physics. For more information see:
http://sites.netscape.net/rafaelveram/index.htm | null | null | null | gr-qc | null | From the equivalence principle (EP) and experiments on gravitational (G) time
dilation (GTD) it is proved that the standards of observers located in
different ``distances'' from the earth are physically different with respect to
each other. Thus the current mathematical relationships between their
measurements are ph... | [
{
"created": "Wed, 7 Nov 2001 09:50:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vera",
"Rafael A.",
""
]
] | From the equivalence principle (EP) and experiments on gravitational (G) time dilation (GTD) it is proved that the standards of observers located in different ``distances'' from the earth are physically different with respect to each other. Thus the current mathematical relationships between their measurements are phys... |
2005.01057 | Robert Reischke | Eileen Giesel, Robert Reischke, Bj\"orn Malte Sch\"afer, Dominic Chia | Information geometry in cosmological inference problems | 20 pages, 5 figures, figures modified, discussion added, matches
journal version | null | 10.1088/1475-7516/2021/01/005 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Statistical inference more often than not involves models which are
non-linear in the parameters thus leading to non-Gaussian posteriors. Many
computational and analytical tools exist that can deal with non-Gaussian
distributions, and empirical Gaussianisation transforms can reduce the amount
of non-Gaussianity in a ... | [
{
"created": "Sun, 3 May 2020 11:32:34 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2020 00:40:13 GMT",
"version": "v2"
}
] | 2021-01-20 | [
[
"Giesel",
"Eileen",
""
],
[
"Reischke",
"Robert",
""
],
[
"Schäfer",
"Björn Malte",
""
],
[
"Chia",
"Dominic",
""
]
] | Statistical inference more often than not involves models which are non-linear in the parameters thus leading to non-Gaussian posteriors. Many computational and analytical tools exist that can deal with non-Gaussian distributions, and empirical Gaussianisation transforms can reduce the amount of non-Gaussianity in a di... |
gr-qc/0309105 | Lorenzo Iorio | Lorenzo Iorio | On the possibility of testing the Weak Equivalence Principle with
artificial Earth satellites | LaTex2e, 13 pages, no figures, no tables. To appear in General
Relativity and Gravitation | Gen.Rel.Grav. 36 (2004) 361-372 | 10.1023/B:GERG.0000010481.56652.5e | null | gr-qc astro-ph hep-ph hep-th physics.space-ph | null | In this paper we examine the possibility of testing the equivalence
principle, in its weak form, by analyzing the orbital motion of a pair of
artificial satellites of different composition moving along orbits of identical
shape and size in the gravitational field of Earth. It turns out that the
obtainable level of ac... | [
{
"created": "Mon, 22 Sep 2003 12:27:07 GMT",
"version": "v1"
}
] | 2007-06-14 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we examine the possibility of testing the equivalence principle, in its weak form, by analyzing the orbital motion of a pair of artificial satellites of different composition moving along orbits of identical shape and size in the gravitational field of Earth. It turns out that the obtainable level of accu... |
1912.07502 | Chiranjeeb Singha | Arpan Chatterjee, Saptarshi Saha, Chiranjeeb Singha | How the mass of a scalar field influences Resonance Casimir-Polder
interaction in Schwarzschild spacetime | 8 pages,2 figures,Comments are welcome | EPL, 130 (2020) 50004 | 10.1209/0295-5075/130/50004 | null | gr-qc hep-th quant-ph | http://creativecommons.org/publicdomain/zero/1.0/ | \emph{Resonance Casimir-Polder interaction(RCPI)} occurs in nature when one
or more atoms are in their excited states and the exchange of real photon is
involved between them due to vacuum fluctuations of the quantum fields. In
recent times, many attempts have been made to show that the curved spacetime
such as the \... | [
{
"created": "Mon, 16 Dec 2019 17:00:58 GMT",
"version": "v1"
}
] | 2020-07-06 | [
[
"Chatterjee",
"Arpan",
""
],
[
"Saha",
"Saptarshi",
""
],
[
"Singha",
"Chiranjeeb",
""
]
] | \emph{Resonance Casimir-Polder interaction(RCPI)} occurs in nature when one or more atoms are in their excited states and the exchange of real photon is involved between them due to vacuum fluctuations of the quantum fields. In recent times, many attempts have been made to show that the curved spacetime such as the \em... |
1803.03313 | Anna M. Nobili | Anna M. Nobili and Alberto Anselmi | Testing the Equivalence Principle in space after the MICROSCOPE mission | To appear on Physical Review D | Phys. Rev. D 98, 042002 (2018) | 10.1103/PhysRevD.98.042002 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tests of the Weak Equivalence Principle can reveal a new, composition
dependent, force of nature or disprove many models of new physics. For the
first time such a test is successfully carried out in space by the MICROSCOPE
satellite. Early results show no violation sourced by the Earth for Pt and Ti
test masses with ... | [
{
"created": "Thu, 8 Mar 2018 21:37:08 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jul 2018 01:06:08 GMT",
"version": "v2"
}
] | 2018-08-29 | [
[
"Nobili",
"Anna M.",
""
],
[
"Anselmi",
"Alberto",
""
]
] | Tests of the Weak Equivalence Principle can reveal a new, composition dependent, force of nature or disprove many models of new physics. For the first time such a test is successfully carried out in space by the MICROSCOPE satellite. Early results show no violation sourced by the Earth for Pt and Ti test masses with ra... |
1803.01666 | Milovan Vasilic | Milovan Vasili\'c | Searching for MOND in scalar-tensor theories of gravity | 26 pages, 4 figures | null | 10.1088/1361-6382/aad38b | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, I study spherically symmetric solutions in a simple class of
geometric sigma models of the Universe. This class of models is a subclass of
the wider class of scalar-tensor theories of gravity. The purpose of this work
is to examine how the additional scalar degree of freedom modifies Newtonian
gravitat... | [
{
"created": "Mon, 5 Mar 2018 14:04:23 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Apr 2018 12:11:12 GMT",
"version": "v2"
}
] | 2018-08-08 | [
[
"Vasilić",
"Milovan",
""
]
] | In this paper, I study spherically symmetric solutions in a simple class of geometric sigma models of the Universe. This class of models is a subclass of the wider class of scalar-tensor theories of gravity. The purpose of this work is to examine how the additional scalar degree of freedom modifies Newtonian gravitatio... |
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