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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1909.00236 | Hosein Ramezani Aval | H. Ramezani-Aval | The fermionic Unruh effect in relativistic eccentric uniformly rotating
frames | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate detection of Dirac quanta in a uniformly eccentric rotating
frame both with canonical and detector approaches by employing relativistic
rotational transformations. First we consider a relativistic uniformly
eccentric rotating detector that is coupled to the scalar density of a massless
Dirac field, and... | [
{
"created": "Sat, 31 Aug 2019 16:14:05 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Ramezani-Aval",
"H.",
""
]
] | We investigate detection of Dirac quanta in a uniformly eccentric rotating frame both with canonical and detector approaches by employing relativistic rotational transformations. First we consider a relativistic uniformly eccentric rotating detector that is coupled to the scalar density of a massless Dirac field, and s... |
1007.3732 | Simone Mercuri | Simone Mercuri | Modifications in the Spectrum of Primordial Gravitational Waves Induced
by Instantonic Fluctuations | V1: 8 pages. V2: 8 pages, some points clarified, typos corrected,
some references added, final result unchanged. V3: 8 pages, title changed,
presentation improved, discussion of phenomenological consequences added,
comments very welcome. V4: Discussion further improved, comments very very
welcome | Phys.Rev.D84:044035,2011 | 10.1103/PhysRevD.84.044035 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum to vacuum instantonic transitions modify the power spectrum of
primordial gravitational waves. We evaluate the new form of the power spectrum
for ordinary gravity as well as the parity violation induced in the spectrum by
a modification of General Relativity known as Holst term and we outline the
possible expe... | [
{
"created": "Wed, 21 Jul 2010 19:51:23 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jul 2010 00:36:13 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Mar 2011 18:01:30 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Jul 2011 16:29:54 GMT",
"version": "v4"
}
] | 2011-09-08 | [
[
"Mercuri",
"Simone",
""
]
] | Vacuum to vacuum instantonic transitions modify the power spectrum of primordial gravitational waves. We evaluate the new form of the power spectrum for ordinary gravity as well as the parity violation induced in the spectrum by a modification of General Relativity known as Holst term and we outline the possible experi... |
1402.5104 | Ahmed Farag Ali | Ahmed Farag Ali and Barun Majumder | Towards a Cosmology with Minimal Length and Maximal Energy | 14 pages, 3 figures, To appear in Class.Quant.Grav | Class.Quant.Grav. 31 (2014) 215007 | 10.1088/0264-9381/31/21/215007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Friedmann-Robertson-Walker (FRW) universe and Bianchi I,II universes are
investigated in the framework of the generalized uncertainty principle (GUP)
with a linear and a quadratic term in Planck length and momentum, which
predicts minimum measurable length as well as maximum measurable momentum. We
get a dynamic ... | [
{
"created": "Thu, 20 Feb 2014 19:06:30 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Feb 2014 15:31:13 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Aug 2014 09:50:57 GMT",
"version": "v3"
}
] | 2014-10-21 | [
[
"Ali",
"Ahmed Farag",
""
],
[
"Majumder",
"Barun",
""
]
] | The Friedmann-Robertson-Walker (FRW) universe and Bianchi I,II universes are investigated in the framework of the generalized uncertainty principle (GUP) with a linear and a quadratic term in Planck length and momentum, which predicts minimum measurable length as well as maximum measurable momentum. We get a dynamic co... |
2112.10590 | Xun Xue | Junhui Lai and Xun Xue | The Scattering of Dirac and Majorana Fermions in Spherically Symmetric
Gravitational Field and Torsion Field | 11 pages, no figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The possibility to distinguish Dirac from Majorana fermion by gravitational
interaction and torsion coupling is discussed. The scattering of both Dirac and
Majorana particles are the same in the spherically symmetric gravitational
field up to the first order perturbation of the fermion-gravity interaction.
The scatte... | [
{
"created": "Mon, 20 Dec 2021 15:09:14 GMT",
"version": "v1"
}
] | 2021-12-21 | [
[
"Lai",
"Junhui",
""
],
[
"Xue",
"Xun",
""
]
] | The possibility to distinguish Dirac from Majorana fermion by gravitational interaction and torsion coupling is discussed. The scattering of both Dirac and Majorana particles are the same in the spherically symmetric gravitational field up to the first order perturbation of the fermion-gravity interaction. The scatteri... |
gr-qc/0207055 | Horacio Casini | H. Casini | A geometrical origin for the covariant entropy bound | 20 pages, 8 figures, final version | Class.Quant.Grav. 20 (2003) 2509-2526 | 10.1088/0264-9381/20/13/304 | CPT-2002/P.4395 | gr-qc hep-th | null | Causal diamond-shaped subsets of space-time are naturally associated with
operator algebras in quantum field theory, and they are also related to the
Bousso covariant entropy bound. In this work we argue that the net of these
causal sets to which are assigned the local operator algebras of quantum
theories should be ... | [
{
"created": "Mon, 15 Jul 2002 08:42:07 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2002 09:28:02 GMT",
"version": "v2"
},
{
"created": "Fri, 9 May 2003 12:22:05 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Casini",
"H.",
""
]
] | Causal diamond-shaped subsets of space-time are naturally associated with operator algebras in quantum field theory, and they are also related to the Bousso covariant entropy bound. In this work we argue that the net of these causal sets to which are assigned the local operator algebras of quantum theories should be ta... |
1103.3415 | Etera R. Livine | Valentin Bonzom, Etera R. Livine | A New Recursion Relation for the 6j-Symbol | 10 pages, v2: title and introduction changed, paper re-structured;
Annales Henri Poincare (2011) | null | 10.1007/s00023-011-0143-y | pi-qg-218 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The 6j-symbol is a fundamental object from the re-coupling theory of SU(2)
representations. In the limit of large angular momenta, its asymptotics is
known to be described by the geometry of a tetrahedron with quantized lengths.
This article presents a new recursion formula for the square of the 6j-symbol.
In the asy... | [
{
"created": "Thu, 17 Mar 2011 13:56:30 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2011 19:33:47 GMT",
"version": "v2"
}
] | 2011-11-16 | [
[
"Bonzom",
"Valentin",
""
],
[
"Livine",
"Etera R.",
""
]
] | The 6j-symbol is a fundamental object from the re-coupling theory of SU(2) representations. In the limit of large angular momenta, its asymptotics is known to be described by the geometry of a tetrahedron with quantized lengths. This article presents a new recursion formula for the square of the 6j-symbol. In the asymp... |
2305.15185 | Andrew L. Miller | Andrew L. Miller | Recent results from continuous gravitational wave searches using data
from LIGO/Virgo/KAGRA's third observing run | Contribution to the 2023 Gravitation session of the 57th Rencontres
de Moriond | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The third observing run of advanced LIGO, Virgo and KAGRA brought
unprecedented sensitivity towards a variety of quasi-monochromatic, persistent
gravitational-wave signals. Continuous waves allow us to probe not just the
existence of canonical asymmetrically rotating neutron stars, but also
different forms of dark ma... | [
{
"created": "Wed, 24 May 2023 14:25:43 GMT",
"version": "v1"
}
] | 2023-05-25 | [
[
"Miller",
"Andrew L.",
""
]
] | The third observing run of advanced LIGO, Virgo and KAGRA brought unprecedented sensitivity towards a variety of quasi-monochromatic, persistent gravitational-wave signals. Continuous waves allow us to probe not just the existence of canonical asymmetrically rotating neutron stars, but also different forms of dark matt... |
gr-qc/0608088 | Asuncion Fuente | A. Fuente, T. Alonso-Albi, R. Bachiller, A. Natta, L. Testi, R. Neri,
P. Planesas | A Keplerian gaseous disk around the B0 star R Mon | 5 pages | Astrophys.J.649:L119-L122,2006 | 10.1086/508349 | null | gr-qc astro-ph | null | We present high-angular resolution observations of the circumstellar disk
around the massive Herbig Be star R Mon (M~8 Msun) in the continuum at 2.7mm
and 1.3mm and the CO 1->0 and 2->1 rotational lines. Based on the new 1.3mm
continuum image we estimate a disk mass (gas+dust) of 0.007 Msun and an outer
radius of <15... | [
{
"created": "Fri, 18 Aug 2006 14:11:44 GMT",
"version": "v1"
}
] | 2011-02-11 | [
[
"Fuente",
"A.",
""
],
[
"Alonso-Albi",
"T.",
""
],
[
"Bachiller",
"R.",
""
],
[
"Natta",
"A.",
""
],
[
"Testi",
"L.",
""
],
[
"Neri",
"R.",
""
],
[
"Planesas",
"P.",
""
]
] | We present high-angular resolution observations of the circumstellar disk around the massive Herbig Be star R Mon (M~8 Msun) in the continuum at 2.7mm and 1.3mm and the CO 1->0 and 2->1 rotational lines. Based on the new 1.3mm continuum image we estimate a disk mass (gas+dust) of 0.007 Msun and an outer radius of <150 ... |
1512.04676 | Peng Xu | Peng Xu and Ho Jung Paik | First-order post-Newtonian analysis of the relativistic tidal effects
for satellite gradiometry and the Mashhoon-Theiss anomaly | Typos in Eq. (11) and Eq. (22b) are corrected. 10 pages, 3 figures | Phys. Rev. D 93, 044057 (2016) | 10.1103/PhysRevD.93.044057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With continuous advances in technology, future satellite gradiometry missions
will be capable of performing precision relativistic experiments and imposing
constraints on modern gravity theories. To this end, the full first-order
post-Newtonian tidal tensor under inertially guided and Earth-pointing local
frames alon... | [
{
"created": "Tue, 15 Dec 2015 08:33:59 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Feb 2016 07:22:26 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Sep 2016 08:38:06 GMT",
"version": "v3"
}
] | 2016-09-29 | [
[
"Xu",
"Peng",
""
],
[
"Paik",
"Ho Jung",
""
]
] | With continuous advances in technology, future satellite gradiometry missions will be capable of performing precision relativistic experiments and imposing constraints on modern gravity theories. To this end, the full first-order post-Newtonian tidal tensor under inertially guided and Earth-pointing local frames along ... |
gr-qc/0702077 | Michel Leclerc | M. Leclerc | Hamiltonian reduction of spin-two theory and of solvable cosmologies | minor changes, refs. added | Class.Quant.Grav.24:4337-4360,2007 | 10.1088/0264-9381/24/17/005 | null | gr-qc | null | The Hamiltonian reduction of the massless spin-two field theory is carried
out following the Faddeev-Jackiw approach. The reduced Hamiltonian contains
only the traceless-transverse fields, but not all of the non-propagating
components can be determined by the constraints of the theory. The reason for
this is found in... | [
{
"created": "Wed, 14 Feb 2007 09:43:47 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2007 13:57:23 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Leclerc",
"M.",
""
]
] | The Hamiltonian reduction of the massless spin-two field theory is carried out following the Faddeev-Jackiw approach. The reduced Hamiltonian contains only the traceless-transverse fields, but not all of the non-propagating components can be determined by the constraints of the theory. The reason for this is found in t... |
gr-qc/0509077 | Daniel Grumiller | Daniel Grumiller | The Volume of 2D Black Holes | 9 pages, 3 figures, uses iopart_mod.cls | J.Phys.Conf.Ser. 33 (2006) 361-366 | 10.1088/1742-6596/33/1/044 | null | gr-qc | null | It is shown that the definition for the volume of stationary black holes
advocated in hep-th/0508108 readily generalizes to the case of dilaton gravity
in D=2. The dilaton field is included as part of the measure. A feature
observed in D=3 and 4 has been the impossibility to obtain infinite volume
while retaining fin... | [
{
"created": "Tue, 20 Sep 2005 11:43:07 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Grumiller",
"Daniel",
""
]
] | It is shown that the definition for the volume of stationary black holes advocated in hep-th/0508108 readily generalizes to the case of dilaton gravity in D=2. The dilaton field is included as part of the measure. A feature observed in D=3 and 4 has been the impossibility to obtain infinite volume while retaining finit... |
1906.08920 | Jianbo Lu | Jianbo Lu, Xin Zhao, Guoying Chee | Cosmology in symmetric teleparallel gravity and its dynamical system | 13 pages, 2 figures. arXiv admin note: text overlap with
arXiv:1806.10437, arXiv:1301.0865 by other authors | Eur. Phys. J. C (2019) 79:530 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore an extension of the symmetric teleparallel gravity denoted the
$f(Q)$ theory, by considering a function of the nonmetricity invariant $Q$ as
the gravitational Lagrangian. Some interesting properties could be found in the
$f(Q)$ theory by comparing with the $f(R)$ and $f(T)$ theories. The field
equations ar... | [
{
"created": "Fri, 21 Jun 2019 02:21:47 GMT",
"version": "v1"
}
] | 2019-06-24 | [
[
"Lu",
"Jianbo",
""
],
[
"Zhao",
"Xin",
""
],
[
"Chee",
"Guoying",
""
]
] | We explore an extension of the symmetric teleparallel gravity denoted the $f(Q)$ theory, by considering a function of the nonmetricity invariant $Q$ as the gravitational Lagrangian. Some interesting properties could be found in the $f(Q)$ theory by comparing with the $f(R)$ and $f(T)$ theories. The field equations are ... |
2201.06976 | Priyasri Kar | Priyasri Kar | Classes of exact solutions for the massless Dirac particle in the
$C$-metric | 18 pages | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The massless Dirac particle in the $C$-metric, representing the exterior
gravitational field of a uniformly accelerating black hole, is studied. Classes
of (quasi-)polynomial solutions to the radial and the polar parts of the Dirac
equation, each of which is equivalent to the general Heun equation~(GHE), are
obtained... | [
{
"created": "Tue, 18 Jan 2022 13:35:13 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Kar",
"Priyasri",
""
]
] | The massless Dirac particle in the $C$-metric, representing the exterior gravitational field of a uniformly accelerating black hole, is studied. Classes of (quasi-)polynomial solutions to the radial and the polar parts of the Dirac equation, each of which is equivalent to the general Heun equation~(GHE), are obtained e... |
2404.17941 | Naman Kumar | Naman Kumar | Variable Brane Tension and Dark Energy | null | EPL 145 39001 (2024) | 10.1209/0295-5075/ad233f | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we show that in a particular braneworld scenario with
variable brane tension, we obtain matter acting as dark energy while the
gravitational constant $G$ promoted to a scalar field on the brane plays the
role of matter (both in the sense they have an 'effective' Equation of State
equivalent to that of... | [
{
"created": "Sat, 27 Apr 2024 15:44:36 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Kumar",
"Naman",
""
]
] | In this letter, we show that in a particular braneworld scenario with variable brane tension, we obtain matter acting as dark energy while the gravitational constant $G$ promoted to a scalar field on the brane plays the role of matter (both in the sense they have an 'effective' Equation of State equivalent to that of d... |
1312.4173 | Alexander Stottmeister | Alexander Stottmeister and Thomas Thiemann | The microlocal spectrum condition, initial value formulations and
background independence | some typos corrected, extended discussion | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the implications of the microlocal spectrum/Hadamard condition for
states in a (linear) quantum field theory on a globally hyperbolic spacetime
$M$ in the context of a (distributional) initial value formulation. More
specifically, we work in a $3+1$-split $M\cong\mathbb{R}\times\Sigma$ and give
a bound, in... | [
{
"created": "Sun, 15 Dec 2013 17:44:56 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Apr 2015 01:17:50 GMT",
"version": "v2"
}
] | 2015-04-10 | [
[
"Stottmeister",
"Alexander",
""
],
[
"Thiemann",
"Thomas",
""
]
] | We analyze the implications of the microlocal spectrum/Hadamard condition for states in a (linear) quantum field theory on a globally hyperbolic spacetime $M$ in the context of a (distributional) initial value formulation. More specifically, we work in a $3+1$-split $M\cong\mathbb{R}\times\Sigma$ and give a bound, inde... |
1404.4036 | Edward Wilson-Ewing | Tomasz Pawlowski, Roberto Pierini, Edward Wilson-Ewing | Loop quantum cosmology of a radiation-dominated flat FLRW universe | 29 pages, 6 figures, v2: Clarifications added, notation improved and
presentation streamlined; matches the version accepted for publication in PRD | Phys. Rev. D 90, 123538 (2014) | 10.1103/PhysRevD.90.123538 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the loop quantum cosmology of a flat
Friedmann-Lemaitre-Robertson-Walker space-time with a Maxwell field. We show
that many of the qualitative properties derived for the case of a massless
scalar field also hold for a Maxwell field. In particular, the big-bang
singularity is replaced by a quantum bounce, and... | [
{
"created": "Tue, 15 Apr 2014 19:40:20 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Dec 2014 14:48:26 GMT",
"version": "v2"
}
] | 2015-01-07 | [
[
"Pawlowski",
"Tomasz",
""
],
[
"Pierini",
"Roberto",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | We study the loop quantum cosmology of a flat Friedmann-Lemaitre-Robertson-Walker space-time with a Maxwell field. We show that many of the qualitative properties derived for the case of a massless scalar field also hold for a Maxwell field. In particular, the big-bang singularity is replaced by a quantum bounce, and t... |
1010.2843 | Jose Luis Hernandez-Pastora | J.L. Hernandez-Pastora and J. Ospino | New Representation of some Static and Axisymmetric Vacuum Solutions | Submitted to General Relativity and Gravitation | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the Einstein vacuum-equations for the case of static and
axisymmetric solutions in a system of coordinates different from the Weyl
standard one. We prove that there exists a class of solutions with the
appropriate asymptotical behaviour which can be written in a simple compact
form, in terms of a function th... | [
{
"created": "Thu, 14 Oct 2010 08:04:09 GMT",
"version": "v1"
}
] | 2010-10-15 | [
[
"Hernandez-Pastora",
"J. L.",
""
],
[
"Ospino",
"J.",
""
]
] | We solve the Einstein vacuum-equations for the case of static and axisymmetric solutions in a system of coordinates different from the Weyl standard one. We prove that there exists a class of solutions with the appropriate asymptotical behaviour which can be written in a simple compact form, in terms of a function that... |
gr-qc/9301006 | Steve Carlip | S. Carlip | Real Tunneling Solutions and the Hartle-Hawking Wave Function | 10 pages, LaTeX, UCD-92-30 | Class.Quant.Grav.10:1057-1064,1993 | 10.1088/0264-9381/10/6/004 | null | gr-qc hep-th | null | A real tunneling solution is an instanton for the Hartle-Hawking path
integral with vanishing extrinsic curvature (vanishing ``momentum'') at the
boundary. Since the final momentum is fixed, its conjugate cannot be specified
freely; consequently, such an instanton will contribute to the wave function at
only one or a... | [
{
"created": "Fri, 8 Jan 1993 21:37:54 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | A real tunneling solution is an instanton for the Hartle-Hawking path integral with vanishing extrinsic curvature (vanishing ``momentum'') at the boundary. Since the final momentum is fixed, its conjugate cannot be specified freely; consequently, such an instanton will contribute to the wave function at only one or a f... |
1905.00030 | B\'eatrice Bonga | B\'eatrice Bonga, Huan Yang and Scott A. Hughes | Tidal resonance in extreme mass-ratio inspirals | 5 pages; v2: matches version published in PRL | Phys. Rev. Lett. 123, 101103 (2019) | 10.1103/PhysRevLett.123.101103 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new class of resonances for extreme mass-ratio inspirals
(EMRIs): tidal resonances, induced by the tidal field of nearby stars or
stellar-mass black holes. A tidal resonance can be viewed as a general
relativistic extension of the Kozai-Lidov resonances in Newtonian systems, and
is distinct from the tra... | [
{
"created": "Tue, 30 Apr 2019 18:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Sep 2019 18:03:29 GMT",
"version": "v2"
}
] | 2019-09-24 | [
[
"Bonga",
"Béatrice",
""
],
[
"Yang",
"Huan",
""
],
[
"Hughes",
"Scott A.",
""
]
] | We describe a new class of resonances for extreme mass-ratio inspirals (EMRIs): tidal resonances, induced by the tidal field of nearby stars or stellar-mass black holes. A tidal resonance can be viewed as a general relativistic extension of the Kozai-Lidov resonances in Newtonian systems, and is distinct from the trans... |
gr-qc/0605149 | Lau Loi So | Lau Loi So | A modification of the Chen-Nester quasilocal expressions | 11 pages | Int.J.Mod.Phys.D16:875-884,2007 | 10.1142/S0218271807010444 | null | gr-qc | null | Chen and Nester proposed four boundary expressions for the quasilocal
quantities using the covariant Hamiltonian formalism. Based on these four
expressions, there is a simple generalization that one can consider, so that a
two parameter set of boundary expressions can be constructed. Using these
modified expressions,... | [
{
"created": "Wed, 31 May 2006 09:23:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"So",
"Lau Loi",
""
]
] | Chen and Nester proposed four boundary expressions for the quasilocal quantities using the covariant Hamiltonian formalism. Based on these four expressions, there is a simple generalization that one can consider, so that a two parameter set of boundary expressions can be constructed. Using these modified expressions, a... |
gr-qc/9809008 | Alejandro Jakubi | Alejandro S. Jakubi | Generalized power expansions in cosmology | 22 pages, LaTeX, elsart.sty. To be published in Computer Physics
Communications Thematic Issue "Computer Algebra in Physics Research" | Comput.Phys.Commun. 115 (1998) 284-299 | 10.1016/S0010-4655(98)00131-3 | null | gr-qc | null | It is given an algorithm to obtain generalized power asymptotic expansions of
the solutions of the Einstein equations arising for several homogeneous
cosmological models. This allows to investigate their behavior near the initial
singularity or for large times. An implementation of this algorithm in the CAS
system Ma... | [
{
"created": "Tue, 1 Sep 1998 19:35:18 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Jakubi",
"Alejandro S.",
""
]
] | It is given an algorithm to obtain generalized power asymptotic expansions of the solutions of the Einstein equations arising for several homogeneous cosmological models. This allows to investigate their behavior near the initial singularity or for large times. An implementation of this algorithm in the CAS system Mapl... |
0809.0537 | Celine Cattoen | Celine Cattoen (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington) | Cosmographic Hubble fits to the supernova data | 28 pages, 4 figures | Phys.Rev.D78:063501,2008 | 10.1103/PhysRevD.78.063501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hubble relation between distance and redshift is a purely cosmographic
relation that depends only on the symmetries of a FLRW spacetime, but does not
intrinsically make any dynamical assumptions. This suggests that it should be
possible to estimate the parameters defining the Hubble relation without making
any dy... | [
{
"created": "Wed, 3 Sep 2008 02:09:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cattoen",
"Celine",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The Hubble relation between distance and redshift is a purely cosmographic relation that depends only on the symmetries of a FLRW spacetime, but does not intrinsically make any dynamical assumptions. This suggests that it should be possible to estimate the parameters defining the Hubble relation without making any dyna... |
1005.4314 | Mauro Cattani | M.Cattani | Einstein Gravitation Theory: Experimental Tests I | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Einstein gravitation theory (EGT) we calculate the Schwarzschild
metric that is defined in the surrounding vacuum of a spherically symmetric
mass distribution, not in rotation. The field equations of the EGT with this
metric were applied to analyze the time dilation and the Doppler Effect of the
light in or... | [
{
"created": "Mon, 24 May 2010 11:49:09 GMT",
"version": "v1"
}
] | 2010-05-25 | [
[
"Cattani",
"M.",
""
]
] | Using the Einstein gravitation theory (EGT) we calculate the Schwarzschild metric that is defined in the surrounding vacuum of a spherically symmetric mass distribution, not in rotation. The field equations of the EGT with this metric were applied to analyze the time dilation and the Doppler Effect of the light in orde... |
gr-qc/9508003 | null | Nemanja Kaloper | A No-Go Theorem in String Cosmology | 7 pages, latex, no figures, contributed talk at the 6th Canadian
Conference on General Relativity and Relativistic Astrophysics, University of
New Brunswick, Fredericton, NB, May 24-28 | null | null | McGill 95-41 | gr-qc | null | A no-go theorem pertaining to the graceful exit problem in Pre-Big-Bang
inflation is reviewed. It is shown that dilaton self-interactions and string
fluid sources fail to facilitate branch changing necessary to avoid
singularities. A comment on the failure of the higher genus corrections to
induce graceful exit is al... | [
{
"created": "Wed, 2 Aug 1995 20:25:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kaloper",
"Nemanja",
""
]
] | A no-go theorem pertaining to the graceful exit problem in Pre-Big-Bang inflation is reviewed. It is shown that dilaton self-interactions and string fluid sources fail to facilitate branch changing necessary to avoid singularities. A comment on the failure of the higher genus corrections to induce graceful exit is also... |
2307.11798 | Amna Ali | Niyaz Uddin Molla, Amna Ali and Ujjal Debnath | Observational Signatures of Modified Bardeen Black Hole: Shadow and
Strong Gravitational Lensing | 20 pages, 30 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | This paper is devoted to studying the observational signatures modified by
Bardeen black hole via shadow and strong lensing observations. Influence of the
modified Bardeen black hole parameters q, g, and the parameter $\mu$ on the
shadow radius of the black hole have been investigated numerically and
graphically. Rec... | [
{
"created": "Fri, 21 Jul 2023 09:46:23 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Nov 2023 12:55:58 GMT",
"version": "v2"
}
] | 2023-11-21 | [
[
"Molla",
"Niyaz Uddin",
""
],
[
"Ali",
"Amna",
""
],
[
"Debnath",
"Ujjal",
""
]
] | This paper is devoted to studying the observational signatures modified by Bardeen black hole via shadow and strong lensing observations. Influence of the modified Bardeen black hole parameters q, g, and the parameter $\mu$ on the shadow radius of the black hole have been investigated numerically and graphically. Recen... |
1511.05377 | Corneliu \c{S}ochichiu | Jaehun Lee and Corneliu Sochichiu | Action-angle variables in curved space-time | 8 pages, corrected misspelled name of one of authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a relativistic and curved space version of action- angle
variables for a particle trapped in a gravity and electromagnetic background
with time-like isometry. As an example, we consider a particle in AdS
background. Furthermore, we obtain the semiclassical quantisation of its energy
levels.
| [
{
"created": "Tue, 17 Nov 2015 12:27:28 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 2015 07:28:41 GMT",
"version": "v2"
}
] | 2015-11-25 | [
[
"Lee",
"Jaehun",
""
],
[
"Sochichiu",
"Corneliu",
""
]
] | We construct a relativistic and curved space version of action- angle variables for a particle trapped in a gravity and electromagnetic background with time-like isometry. As an example, we consider a particle in AdS background. Furthermore, we obtain the semiclassical quantisation of its energy levels. |
1201.6448 | Hamid Reza Sepangi | Zahra Haghani, Hamid Reza Sepangi, Shahab Shahidi | Cosmological dynamics of brane f(R) gravity | 18 pages, 4 figures, to appear in JCAP | JCAP 02 (2012) 031 | 10.1088/1475-7516/2012/02/031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological dynamics of a brane world scenario where the bulk action is
taken as a generic function of the Ricci scalar is considered in a framework
where the use of the $\mathbb{Z}_2$ symmetry and Israel junction conditions are
relaxed. The corresponding cosmological solutions for some specific forms of
$f(\mc{... | [
{
"created": "Tue, 31 Jan 2012 05:07:02 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Mar 2012 07:47:52 GMT",
"version": "v2"
}
] | 2013-08-13 | [
[
"Haghani",
"Zahra",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | The cosmological dynamics of a brane world scenario where the bulk action is taken as a generic function of the Ricci scalar is considered in a framework where the use of the $\mathbb{Z}_2$ symmetry and Israel junction conditions are relaxed. The corresponding cosmological solutions for some specific forms of $f(\mc{R}... |
1510.04333 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Singular Inflationary Universe from $F(R)$ Gravity | null | null | 10.1103/PhysRevD.92.124024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unlike crushing singularities, the so-called Type IV finite-time singularity
offers the possibility that the Universe passes smoothly through it, without
any catastrophic effects. Then the question is if the effects of a Type IV
singularity can be detected in the process of cosmic evolution. In this paper
we address ... | [
{
"created": "Wed, 14 Oct 2015 22:19:00 GMT",
"version": "v1"
}
] | 2015-12-23 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | Unlike crushing singularities, the so-called Type IV finite-time singularity offers the possibility that the Universe passes smoothly through it, without any catastrophic effects. Then the question is if the effects of a Type IV singularity can be detected in the process of cosmic evolution. In this paper we address th... |
1807.05024 | Changjun Gao | Shuang Yu and Changjun Gao | Quansinormal modes of static and spherically symmetric black holes with
the derivative coupling | 13 pages,7 figures. GRG accepted | General Relativity and Gravitation (2019) 51:16 | 10.1007/s10714-019-2500-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quasinormal modes of a class of static and spherically
symmetric black holes with the derivative coupling. The derivative coupling has
rarely been paid attention to the study of black hole quasinormal modes.
Specifically, we study the effect of derivative coupling on the quasinormal
modes for four ... | [
{
"created": "Fri, 13 Jul 2018 11:57:00 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Dec 2018 07:06:23 GMT",
"version": "v2"
}
] | 2019-01-23 | [
[
"Yu",
"Shuang",
""
],
[
"Gao",
"Changjun",
""
]
] | We investigate the quasinormal modes of a class of static and spherically symmetric black holes with the derivative coupling. The derivative coupling has rarely been paid attention to the study of black hole quasinormal modes. Specifically, we study the effect of derivative coupling on the quasinormal modes for four ki... |
gr-qc/0612055 | Puxun Wu | Puxun Wu and Hongwei Yu | Generalized Chaplygin gas model: constraints from Hubble parameter
versus Redshift Data | 13 pages, 5 figures, to appear in PLB | Phys.Lett.B644:16-19,2007 | 10.1016/j.physletb.2006.11.028 | null | gr-qc | null | We examine observational constraints on the generalized Chaplygin gas (GCG)
model for dark energy from the 9 Hubble parameter data points, the 115 SNLS Sne
Ia data and the size of baryonic acoustic oscillation peak at redshift,
$z=0.35$. At a 95.4% confidence level, a combination of three data sets gives
$0.67\leq A_... | [
{
"created": "Sat, 9 Dec 2006 02:43:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | We examine observational constraints on the generalized Chaplygin gas (GCG) model for dark energy from the 9 Hubble parameter data points, the 115 SNLS Sne Ia data and the size of baryonic acoustic oscillation peak at redshift, $z=0.35$. At a 95.4% confidence level, a combination of three data sets gives $0.67\leq A_s\... |
gr-qc/9807083 | Hyeong-Chan Kim | Hyeong-Chan Kim, Yoonbai Kim, Phillial Oh | Black Hole Entropy and Exclusion Statistics | REVTeX file, 12 pages | null | null | SNUTP/98-065, MIT-CTP/2766 | gr-qc | null | We compute the entropy of systems of quantum particles satisfying the
fractional exclusion statistics in the space-time of 2+1 dimensional black hole
by using the brick-wall method. We show that the entropy of each effective
quantum field theory with a Planck scale ultraviolet cutoff obeys the area law,
irrespective ... | [
{
"created": "Thu, 30 Jul 1998 14:46:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Kim",
"Yoonbai",
""
],
[
"Oh",
"Phillial",
""
]
] | We compute the entropy of systems of quantum particles satisfying the fractional exclusion statistics in the space-time of 2+1 dimensional black hole by using the brick-wall method. We show that the entropy of each effective quantum field theory with a Planck scale ultraviolet cutoff obeys the area law, irrespective of... |
gr-qc/9707003 | Martin Goliath | Kjell Rosquist and Martin Goliath | Lax pair tensors and integrable spacetimes | 10 pages, LaTeX | Gen.Rel.Grav. 30 (1998) 1521-1534 | 10.1023/A:1018817209424 | null | gr-qc nlin.SI solv-int | null | The use of Lax pair tensors as a unifying framework for Killing tensors of
arbitrary rank is discussed. Some properties of the tensorial Lax pair
formulation are stated. A mechanical system with a well-known Lax
representation -- the three-particle open Toda lattice -- is geometrized by a
suitable canonical transform... | [
{
"created": "Wed, 2 Jul 1997 08:18:39 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Rosquist",
"Kjell",
""
],
[
"Goliath",
"Martin",
""
]
] | The use of Lax pair tensors as a unifying framework for Killing tensors of arbitrary rank is discussed. Some properties of the tensorial Lax pair formulation are stated. A mechanical system with a well-known Lax representation -- the three-particle open Toda lattice -- is geometrized by a suitable canonical transformat... |
0707.2749 | Boris Kosyakov | B.P.Kosyakov | Black holes: interfacing the classical and the quantum | comment: LaTeX, 12 pages | Found.Phys.38:678-694,2008 | 10.1007/s10701-008-9227-z | null | gr-qc | null | The central idea advocated in this paper is that {forming the black hole
horizon is attended with transition from the classical regime of evolution to
the quantum one}. We justify the following criterion for discriminating between
the classical and the quantum: {spontaneous creations and annihilations of
particle-ant... | [
{
"created": "Wed, 18 Jul 2007 15:36:54 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kosyakov",
"B. P.",
""
]
] | The central idea advocated in this paper is that {forming the black hole horizon is attended with transition from the classical regime of evolution to the quantum one}. We justify the following criterion for discriminating between the classical and the quantum: {spontaneous creations and annihilations of particle-antip... |
0904.0574 | Francesco Cianfrani dr | Francesco Cianfrani, Giovanni Montani | Review on Extended Approaches in the Kaluza-Klein Model | 5 pages, Proceedings of The 3rd Stueckelberg Workshop on Relativistic
Field Theories | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of the Kaluza-Klein formulation is provided, with a particular
emphasis on the geometrization issue. The failure at reproducing quantum
numbers of particles and the appearance of huge mass terms are outlined. The
possibility to solve these points by an extended approach based on an averaging
procedure is dis... | [
{
"created": "Fri, 3 Apr 2009 13:23:39 GMT",
"version": "v1"
}
] | 2009-04-06 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
]
] | A review of the Kaluza-Klein formulation is provided, with a particular emphasis on the geometrization issue. The failure at reproducing quantum numbers of particles and the appearance of huge mass terms are outlined. The possibility to solve these points by an extended approach based on an averaging procedure is discu... |
gr-qc/0207122 | Pascual-Sanchez J.-F. | J.-F. Pascual-S\'anchez | TELEPENSOUTH project: Measurement of the Earth gravitomagnetic field in
a terrestrial laboratory | 7 pages, LaTeX, Springer style files included. Contribution to the
Proceedings of the Spanish Relativity Meeting-ERE-2001 (Madrid, September
2001). To appear in the book "Relativistic Astrophysics", Lecture Notes in
Physics, Springer Verlag (2002), edited by L. Fernandez-Jambrina, L.M.
Gonzalez-Romero | Lect.Notes Phys. 617 (2003) 330-336 | 10.1007/3-540-36973-2_20 | null | gr-qc astro-ph | null | We will expose a preliminary study on the feasibility of an experiment
leading to a direct measurement of the gravitomagnetic field generated by the
rotational motion of the Earth. This measurement would be achieved by means of
an appropriate coupling of a TELEscope and a Foucault PENdulum in a laboratory
on ground, ... | [
{
"created": "Tue, 30 Jul 2002 21:35:16 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Pascual-Sánchez",
"J. -F.",
""
]
] | We will expose a preliminary study on the feasibility of an experiment leading to a direct measurement of the gravitomagnetic field generated by the rotational motion of the Earth. This measurement would be achieved by means of an appropriate coupling of a TELEscope and a Foucault PENdulum in a laboratory on ground, pr... |
2206.08689 | Igor Yu. Potemine | Igor Yu. Potemine | Hyperverse, 5-dimensional gravity and multiverses as nested
Gogberashvili shells | 8 pages, 1 figure | null | 10.4236/jhepgc.2022.84069 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider the Hyperverse as a collection of multiverses in 5-dimensional
spacetime with gravitational constant $G$. Each multiverse in our simplified
model is a bouquet of nested spherical Gogberashvili shells. If $g_k$ is the
gravitational constant of a thin shell $S_k$ and $\varepsilon_k^{}$ its
thickness then $G... | [
{
"created": "Fri, 17 Jun 2022 11:16:34 GMT",
"version": "v1"
}
] | 2024-04-23 | [
[
"Potemine",
"Igor Yu.",
""
]
] | We consider the Hyperverse as a collection of multiverses in 5-dimensional spacetime with gravitational constant $G$. Each multiverse in our simplified model is a bouquet of nested spherical Gogberashvili shells. If $g_k$ is the gravitational constant of a thin shell $S_k$ and $\varepsilon_k^{}$ its thickness then $G\s... |
gr-qc/9912118 | Steven Carlip | S. Carlip | Black Hole Entropy from Horizon Conformal Field Theory | 8 pages, LaTeX; talk given at QG99,``Constrained Dynamics and Quantum
Gravity,'' Villasimius, Sept. 1999 | Nucl.Phys.Proc.Suppl.88:10-16,2000 | 10.1016/S0920-5632(00)00748-9 | null | gr-qc hep-th | null | String theory and ``quantum geometry'' have recently offered independent
statistical mechanical explanations of black hole thermodynamics. But these
successes raise a new problem: why should models with such different
microscopic degrees of freedom yield identical results? I propose that the
asymptotic behavior of th... | [
{
"created": "Wed, 29 Dec 1999 20:44:22 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | String theory and ``quantum geometry'' have recently offered independent statistical mechanical explanations of black hole thermodynamics. But these successes raise a new problem: why should models with such different microscopic degrees of freedom yield identical results? I propose that the asymptotic behavior of the ... |
1603.07621 | Kenji Tomita | Kenji Tomita | Note on Nariai and Tomita's and Starobinsky's cosmological solutions in
the R^2 modified gravity | 5 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological solutions derived by Nariai and Tomita (1971) and by Starobinsky
(1980) are compared, and it is shown that the former derived de Sitter
expansion in the R^2 modified gravity (without cosmological constant) at the
earliest stage, and nine years later the latter derived the well-known
inflationary solution... | [
{
"created": "Sun, 20 Mar 2016 06:53:57 GMT",
"version": "v1"
}
] | 2016-03-25 | [
[
"Tomita",
"Kenji",
""
]
] | Cosmological solutions derived by Nariai and Tomita (1971) and by Starobinsky (1980) are compared, and it is shown that the former derived de Sitter expansion in the R^2 modified gravity (without cosmological constant) at the earliest stage, and nine years later the latter derived the well-known inflationary solution. ... |
1912.01869 | Giampiero Esposito Dr. | Donato Bini, Giampiero Esposito | New solutions of the Ermakov-Pinney equation in curved space-time | 20 pages, 10 figures. The presentation has been improved | null | 10.1007/s10714-020-02713-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An Ermakov-Pinney-like equation associated with the scalar wave equation in
curved space-time is here studied. The example of Schwarzschild space-time
considered in the present work shows that this equation can be viewed more as a
model equation, with interesting applications in black hole physics. Other
applications... | [
{
"created": "Wed, 4 Dec 2019 09:57:50 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2020 07:21:32 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Bini",
"Donato",
""
],
[
"Esposito",
"Giampiero",
""
]
] | An Ermakov-Pinney-like equation associated with the scalar wave equation in curved space-time is here studied. The example of Schwarzschild space-time considered in the present work shows that this equation can be viewed more as a model equation, with interesting applications in black hole physics. Other applications s... |
gr-qc/9803018 | Jorge Pullin | Rodolfo Gambini, Jorge Griego, Jorge Pullin | Vassiliev invariants: a new framework for quantum gravity | 15 pages, several figures included with psfig | Nucl.Phys. B534 (1998) 675-696 | 10.1016/S0550-3213(98)80012-6 | CGPG-98/3-1 | gr-qc | null | We show that Vassiliev invariants of knots, appropriately generalized to the
spin network context, are loop differentiable in spite of being diffeomorphism
invariant. This opens the possibility of defining rigorously the constraints of
quantum gravity as geometrical operators acting on the space of Vassiliev
invarian... | [
{
"created": "Thu, 5 Mar 1998 05:36:10 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Griego",
"Jorge",
""
],
[
"Pullin",
"Jorge",
""
]
] | We show that Vassiliev invariants of knots, appropriately generalized to the spin network context, are loop differentiable in spite of being diffeomorphism invariant. This opens the possibility of defining rigorously the constraints of quantum gravity as geometrical operators acting on the space of Vassiliev invariants... |
1810.02725 | Nadia Bolis | Nadia Bolis, Constantinos Skordis, Daniel B Thomas, Tom Zlosnik | The Parameterized Post-Newtonian-Vainshteinian formalism for the
Galileon field | 18 pages, 2 figure | Phys. Rev. D 99, 084009 (2019) | 10.1103/PhysRevD.99.084009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, an extension to the Parameterized Post-Newtonian (PPN) formalism
has been proposed. This formalism, the Parameterized
Post-Newtonian-Vainshteinian (PPNV) formalism, is well suited to theories which
exhibit Vainshtein screening of scalar fields. In this paper we apply the PPNV
formalism to the Quartic and Qu... | [
{
"created": "Fri, 5 Oct 2018 14:42:48 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Mar 2019 14:06:43 GMT",
"version": "v2"
}
] | 2019-04-17 | [
[
"Bolis",
"Nadia",
""
],
[
"Skordis",
"Constantinos",
""
],
[
"Thomas",
"Daniel B",
""
],
[
"Zlosnik",
"Tom",
""
]
] | Recently, an extension to the Parameterized Post-Newtonian (PPN) formalism has been proposed. This formalism, the Parameterized Post-Newtonian-Vainshteinian (PPNV) formalism, is well suited to theories which exhibit Vainshtein screening of scalar fields. In this paper we apply the PPNV formalism to the Quartic and Quin... |
0908.4476 | Simone Speziale | J. Daniel Christensen, Igor Khavkine, Etera R. Livine and Simone
Speziale | Sub-leading asymptotic behaviour of area correlations in the
Barrett-Crane model | 20 pages, 15 figures | Class.Quant.Grav.27:035012,2010 | 10.1088/0264-9381/27/3/035012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Barrett-Crane spin foam model for quantum gravity provides an excellent
setting for testing analytical and numerical tools used to probe spinfoam
models. Here, we complete the report on the numerical analysis of the single
4-simplex area correlations begun in Phys. Lett. B670 (2009) 403-406,
discussing the next-t... | [
{
"created": "Mon, 31 Aug 2009 08:39:00 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Christensen",
"J. Daniel",
""
],
[
"Khavkine",
"Igor",
""
],
[
"Livine",
"Etera R.",
""
],
[
"Speziale",
"Simone",
""
]
] | The Barrett-Crane spin foam model for quantum gravity provides an excellent setting for testing analytical and numerical tools used to probe spinfoam models. Here, we complete the report on the numerical analysis of the single 4-simplex area correlations begun in Phys. Lett. B670 (2009) 403-406, discussing the next-to-... |
2101.10802 | Morteza Kerachian | M. Kerachian and G. Acquaviva and G. Lukes-Gerakopoulos | Dynamical analysis approaches in spatially curved FRW spacetimes | 11 pages, 2 figures, 1 table | Proceedings of RAGtime 20-22, 15-19 Oct., 16-20 Sept., 19-23 Oct.,
2018/2019/2020, Opava, Czech Republic, Z. Stuchlik, G. Torok and V. Karas,
editors, Silesian University in Opava, 2020, pp. 133-143 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we summarize two agnostic approaches in the framework of
spatially curved Friedmann-Robertson-Walker (FRW) cosmologies discussed in
detail in (Kerachian et al., 2020, 2019). The first case concerns the dynamics
of a fluid with an unspecified barotropic equation of state (EoS), for which
the only assu... | [
{
"created": "Tue, 26 Jan 2021 14:26:09 GMT",
"version": "v1"
}
] | 2021-01-27 | [
[
"Kerachian",
"M.",
""
],
[
"Acquaviva",
"G.",
""
],
[
"Lukes-Gerakopoulos",
"G.",
""
]
] | In this article, we summarize two agnostic approaches in the framework of spatially curved Friedmann-Robertson-Walker (FRW) cosmologies discussed in detail in (Kerachian et al., 2020, 2019). The first case concerns the dynamics of a fluid with an unspecified barotropic equation of state (EoS), for which the only assump... |
0805.1417 | Gerald Marsh | Gerald E. Marsh | Charge, geometry, and effective mass in the Kerr-Newman solution to the
Einstein field equations | To appear in Foundations of Physics. Misprints have been corrected.
14 pages, 4 figures | null | 10.1007/s10701-008-9245-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that for the Reissner-Nordstrom solution to the vacuum
Einstein field equations charge, like mass, has a unique space-time signature
[Found. Phys. 38, 293-300 (2008)]. The presence of charge results in a negative
curvature. This work, which includes a discussion of effective mass, is
extended here t... | [
{
"created": "Fri, 9 May 2008 20:16:53 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Oct 2008 19:31:57 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Marsh",
"Gerald E.",
""
]
] | It has been shown that for the Reissner-Nordstrom solution to the vacuum Einstein field equations charge, like mass, has a unique space-time signature [Found. Phys. 38, 293-300 (2008)]. The presence of charge results in a negative curvature. This work, which includes a discussion of effective mass, is extended here to ... |
0809.1571 | Claude Warnick | G. W. Gibbons, C. M. Warnick | Universal properties of the near-horizon optical geometry | null | Phys.Rev.D79:064031,2009 | 10.1103/PhysRevD.79.064031 | DAMTP-2008-80 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make use of the fact that the optical geometry near a static
non-degenerate Killing horizon is asymptotically hyperbolic to investigate
universal features of black hole physics. We show how the Gauss-Bonnet theorem
allows certain lensing scenarios to be ruled in or out. We find rates for the
loss of scalar, vector... | [
{
"created": "Tue, 9 Sep 2008 14:42:03 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Gibbons",
"G. W.",
""
],
[
"Warnick",
"C. M.",
""
]
] | We make use of the fact that the optical geometry near a static non-degenerate Killing horizon is asymptotically hyperbolic to investigate universal features of black hole physics. We show how the Gauss-Bonnet theorem allows certain lensing scenarios to be ruled in or out. We find rates for the loss of scalar, vector a... |
0805.0519 | Rakesh Tibrewala | Cenalo Vaz, Rakesh Tibrewala and T.P. Singh | Classical and Quantum Gravitational Collapse in d-dim AdS Spacetime II.
Quantum States and Hawking Radiation | 20 pages | Phys.Rev.D78:024019,2008 | 10.1103/PhysRevD.78.024019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper we studied the collapse of a spherically symmetric dust
distribution (marginally bound LTB) in d-dimensional AdS spacetime and obtained
the condition for the formation of trapped surfaces. Here we extend the
analysis by giving the canonical theory for the same and subsequently quantize
the system ... | [
{
"created": "Mon, 5 May 2008 12:37:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Vaz",
"Cenalo",
""
],
[
"Tibrewala",
"Rakesh",
""
],
[
"Singh",
"T. P.",
""
]
] | In a previous paper we studied the collapse of a spherically symmetric dust distribution (marginally bound LTB) in d-dimensional AdS spacetime and obtained the condition for the formation of trapped surfaces. Here we extend the analysis by giving the canonical theory for the same and subsequently quantize the system by... |
2006.10462 | Antonina Zinhailo | R. A. Konoplya, A. F. Zinhailo and Z. Stuchlik | Quasinormal modes and Hawking radiation of black holes in cubic gravity | 10 pages, revtex, 11 figures, the version to match the published PRD
version A typo in formula 27 | Phys. Rev. D 102, 044023 (2020) | 10.1103/PhysRevD.102.044023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider quasinormal modes and Hawking radiation of four-dimensional
asymptotically flat black holes in the most general up
to-cubic-order-in-curvature dimension-independent Einsteinian theory of gravity
that shares its graviton spectrum with the Einstein theory on constant
curvature backgrounds. We show that damp... | [
{
"created": "Thu, 18 Jun 2020 12:16:09 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jun 2020 00:44:24 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Aug 2020 14:20:50 GMT",
"version": "v3"
},
{
"created": "Fri, 17 Sep 2021 08:46:56 GMT",
"version": "v4"
}
] | 2021-09-20 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zinhailo",
"A. F.",
""
],
[
"Stuchlik",
"Z.",
""
]
] | We consider quasinormal modes and Hawking radiation of four-dimensional asymptotically flat black holes in the most general up to-cubic-order-in-curvature dimension-independent Einsteinian theory of gravity that shares its graviton spectrum with the Einstein theory on constant curvature backgrounds. We show that dampin... |
1010.5090 | Francesco Cianfrani dr | Francesco Cianfrani, Giovanni Montani, Marco Muccino | Semi-Classical Isotropization of the Universe during a de Sitter phase | 6 pages, accepted for publication in Phys. Rev. D | Phys.Rev.D82:103524,2010 | 10.1103/PhysRevD.82.103524 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Semi-classical states for the Wheeler-DeWitt equation of a Bianchi type I
model in the presence of a scalar field are analyzed. It is outlined how this
scheme can effectively describe more general situations, where the curvature of
the Bianchi type IX model and a proper potential term for the scalar field are
present... | [
{
"created": "Mon, 25 Oct 2010 11:13:25 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
],
[
"Muccino",
"Marco",
""
]
] | Semi-classical states for the Wheeler-DeWitt equation of a Bianchi type I model in the presence of a scalar field are analyzed. It is outlined how this scheme can effectively describe more general situations, where the curvature of the Bianchi type IX model and a proper potential term for the scalar field are present. ... |
1808.03825 | Miguel Cruz | Miguel Cruz, Samuel Lepe and Sergei D. Odintsov | Thermodynamically allowed phantom cosmology with viscous fluid | 9 pages, 3 figures. Accepted version in PRD | Phys. Rev. D 98, 083515 (2018) | 10.1103/PhysRevD.98.083515 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present an analysis of the phantom zone in a causal viscous
cosmology from a thermodynamic point of view. In this description we consider a
chemical potential and the approach of irreversible processes. We assume a flat
universe filled with a single dissipative fluid described by a barotropic
equation... | [
{
"created": "Sat, 11 Aug 2018 16:12:21 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Sep 2018 15:45:03 GMT",
"version": "v2"
},
{
"created": "Sun, 30 Sep 2018 13:20:34 GMT",
"version": "v3"
}
] | 2018-10-11 | [
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | In this work we present an analysis of the phantom zone in a causal viscous cosmology from a thermodynamic point of view. In this description we consider a chemical potential and the approach of irreversible processes. We assume a flat universe filled with a single dissipative fluid described by a barotropic equation o... |
gr-qc/0306112 | Glenn Barnich | Glenn Barnich, Friedemann Brandt and Kim Claes | Asymptotically anti-de Sitter space-times: symmetries and conservation
laws revisited | 6 pages Latex file, Proceedings for the conference "Renormalization
Group and Anomalies in Gravity and Cosmology", Ouro Preto, Brazil, 17 - 23
March, 2003 | null | 10.1016/S0920-5632(03)02410-1 | ULB-TH/03-26, MPI-MIS-51/2003 | gr-qc hep-th | null | In this short note, we verify explicitly in static coordinates that the non
trivial asymptotic Killing vectors at spatial infinity for anti-de Sitter
space-times correspond one to one to the conformal Killing vectors of the
conformally flat metric induced on the boundary. The fall-off conditions for
the metric pertur... | [
{
"created": "Wed, 25 Jun 2003 13:13:02 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Barnich",
"Glenn",
""
],
[
"Brandt",
"Friedemann",
""
],
[
"Claes",
"Kim",
""
]
] | In this short note, we verify explicitly in static coordinates that the non trivial asymptotic Killing vectors at spatial infinity for anti-de Sitter space-times correspond one to one to the conformal Killing vectors of the conformally flat metric induced on the boundary. The fall-off conditions for the metric perturba... |
2003.01934 | Aya Iyonaga | Aya Iyonaga, Kazufumi Takahashi and Tsutomu Kobayashi | Extended Cuscuton as Dark Energy | 12 pages, 2 figures | JCAP 07 (2020) 004 | 10.1088/1475-7516/2020/07/004 | RUP-20-6, KOBE-COSMO-20-02 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Late-time cosmology in the extended cuscuton theory is studied, in which
gravity is modified while one still has no extra dynamical degrees of freedom
other than two tensor modes. We present a simple example admitting analytic
solutions for the cosmological background evolution that mimics $\Lambda$CDM
cosmology. We ... | [
{
"created": "Wed, 4 Mar 2020 07:58:27 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jul 2020 14:51:37 GMT",
"version": "v2"
}
] | 2020-07-03 | [
[
"Iyonaga",
"Aya",
""
],
[
"Takahashi",
"Kazufumi",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | Late-time cosmology in the extended cuscuton theory is studied, in which gravity is modified while one still has no extra dynamical degrees of freedom other than two tensor modes. We present a simple example admitting analytic solutions for the cosmological background evolution that mimics $\Lambda$CDM cosmology. We ar... |
1901.01363 | Hernando Quevedo | Antonio C. Guti\'errez-Pi\~neres and Hernando Quevedo | $C^3$ matching for asymptotically flat spacetimes | null | null | 10.1088/1361-6382/ab2422 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a criterion for finding the minimum distance at which an interior
solution of Einstein's equations can be matched with an exterior asymptotically
flat solution. It is based upon the analysis of the eigenvalues of the Riemann
curvature tensor and their first derivatives, implying $C^3$ differentiability
con... | [
{
"created": "Sat, 5 Jan 2019 04:18:46 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We propose a criterion for finding the minimum distance at which an interior solution of Einstein's equations can be matched with an exterior asymptotically flat solution. It is based upon the analysis of the eigenvalues of the Riemann curvature tensor and their first derivatives, implying $C^3$ differentiability condi... |
gr-qc/0407089 | Nikolaos Mavromatos | John Ellis (CERN), N.E. Mavromatos (King's Coll. Lon.), D.V.
Nanopoulos (TAMU) and A. Sakharov (CERN and ETH) | Brany Liouville Inflation | 23 pages LATEX, two eps figures incorporated; version accepted for
publication in NJP | New J.Phys.6:171,2004 | 10.1088/1367-2630/6/1/171 | CERN-PH-TH/2004-134 | gr-qc astro-ph hep-ph hep-th | null | We present a specific model for cosmological inflation driven by the
Liouville field in a non-critical supersymmetric string framework, in which the
departure from criticality is due to open strings stretched between the two
moving Type-II 5-branes. We use WMAP and other data on fluctuations in the
cosmic microwave b... | [
{
"created": "Fri, 23 Jul 2004 15:23:17 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jul 2004 09:57:13 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Aug 2004 15:58:55 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Nov 2004 13:56:55 GMT",
"version": "v4"
}
] | 2009-09-11 | [
[
"Ellis",
"John",
"",
"CERN"
],
[
"Mavromatos",
"N. E.",
"",
"King's Coll. Lon."
],
[
"Nanopoulos",
"D. V.",
"",
"TAMU"
],
[
"Sakharov",
"A.",
"",
"CERN and ETH"
]
] | We present a specific model for cosmological inflation driven by the Liouville field in a non-critical supersymmetric string framework, in which the departure from criticality is due to open strings stretched between the two moving Type-II 5-branes. We use WMAP and other data on fluctuations in the cosmic microwave bac... |
1704.04961 | Grigoris Panotopoulos | Grigoris Panotopoulos | Strange stars in $f(R)$ theories of gravity in the Palatini formalism | 10 pages, 2 figures | Gen Relativ Gravit (2017) 49: 69 | 10.1007/s10714-017-2230-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we study strange stars in $f(R)$ theories of gravity in
the Palatini formalism. We consider two concrete well-known cases, namely the
$R+R^2/(6 M^2)$ model as well as the $R-\mu^4/R$ model for two different values
of the mass parameter $M$ or $\mu$. We integrate the modified
Tolman-Oppenheimer-Vol... | [
{
"created": "Mon, 17 Apr 2017 13:30:48 GMT",
"version": "v1"
}
] | 2017-05-03 | [
[
"Panotopoulos",
"Grigoris",
""
]
] | In the present work we study strange stars in $f(R)$ theories of gravity in the Palatini formalism. We consider two concrete well-known cases, namely the $R+R^2/(6 M^2)$ model as well as the $R-\mu^4/R$ model for two different values of the mass parameter $M$ or $\mu$. We integrate the modified Tolman-Oppenheimer-Volko... |
1806.06791 | Rhiannon Cuttell | Rhiannon Cuttell and Mairi Sakellariadou | Deformed general relativity and scalar-tensor models | 20 pages, 4 figures, authors' accepted manuscript | Class.Quant.Grav. 35, 225005, (2018) | 10.1088/1361-6382/aae442 | KCL-PH-TH/2018-26 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the most general action for a scalar-tensor model up to
quadratic order in derivatives with deformed general covariance and non-minimal
coupling. We demonstrate how different choices of the free functions recover
specific well known scalar-tensor models. We look at the cosmological dynamics
and find the ... | [
{
"created": "Mon, 18 Jun 2018 15:59:50 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Oct 2018 15:11:48 GMT",
"version": "v2"
}
] | 2018-10-24 | [
[
"Cuttell",
"Rhiannon",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | We calculate the most general action for a scalar-tensor model up to quadratic order in derivatives with deformed general covariance and non-minimal coupling. We demonstrate how different choices of the free functions recover specific well known scalar-tensor models. We look at the cosmological dynamics and find the ge... |
1203.2679 | Matilde Marcolli | Christopher Estrada and Matilde Marcolli | Noncommutative Mixmaster Cosmologies | 24 pages LaTeX | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate a variant of the classical mixmaster universe
model of anisotropic cosmology, where the spatial sections are noncommutative
3-tori. We consider ways in which the discrete dynamical system describing the
mixmaster dynamics can be extended to act on the noncommutative torus moduli,
and how ... | [
{
"created": "Tue, 13 Mar 2012 00:31:43 GMT",
"version": "v1"
}
] | 2012-03-14 | [
[
"Estrada",
"Christopher",
""
],
[
"Marcolli",
"Matilde",
""
]
] | In this paper we investigate a variant of the classical mixmaster universe model of anisotropic cosmology, where the spatial sections are noncommutative 3-tori. We consider ways in which the discrete dynamical system describing the mixmaster dynamics can be extended to act on the noncommutative torus moduli, and how th... |
gr-qc/0009025 | Michael L. Fil'chenkov | I.G. Dymnikova (Institute of Mathematics, Informatics and Physics,
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland), M.L.
Fil'chenkov (Alexander Friedmann Laboratory for Theoretical Physics, St.
Petersburg, Russia; Institute of Gravitation and Cosmology, Peoples'
Friendship University of Russia, Mos... | Quantum Birth of a Hot Universe | 9 pages, no figures, LaTex, submitted to Phys. Rev. D | Phys.Lett. B545 (2002) 214-220 | 10.1016/S0370-2693(02)02620-5 | null | gr-qc | null | We consider quantum birth of a hot Universe in the framework of quantum
qeometrodynamics in the minisuperspace model. The energy spectrum of the
Universe in the pre-de-Sitter domain naturally explains the cosmic microwave
background (CMB) anisotropy. The false vacuum where the Universe tunnels from
the pre-de-Sitter ... | [
{
"created": "Fri, 8 Sep 2000 22:40:10 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dymnikova",
"I. G.",
"",
"Institute of Mathematics, Informatics and Physics,\n University of Warmia and Mazury in Olsztyn, Olsztyn, Poland"
],
[
"Fil'chenkov",
"M. L.",
"",
"Alexander Friedmann Laboratory for Theoretical Physics, St.\n Petersburg, Russia; Institute of Gravit... | We consider quantum birth of a hot Universe in the framework of quantum qeometrodynamics in the minisuperspace model. The energy spectrum of the Universe in the pre-de-Sitter domain naturally explains the cosmic microwave background (CMB) anisotropy. The false vacuum where the Universe tunnels from the pre-de-Sitter do... |
1812.02835 | Roberto Pierini | Roberto Pierini, Shahpoor Moradi, and Stefano Mancini | Entanglement in anisotropic expanding spacetime | null | Eur. Phys. J. D (2019) 73: 33 | 10.1140/epjd/e2019-90463-y | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of space anisotropy in the entanglement generated by
expanding universe on spin 0 and 1/2 fields. For massive scalar field we find
revivals of entanglement entropy vs momentum after decreasing from the maximum
at k = 0. In massive Dirac field the effect is a slight distortion of the
non-monotonic ... | [
{
"created": "Thu, 6 Dec 2018 22:27:40 GMT",
"version": "v1"
}
] | 2019-03-13 | [
[
"Pierini",
"Roberto",
""
],
[
"Moradi",
"Shahpoor",
""
],
[
"Mancini",
"Stefano",
""
]
] | We study the effect of space anisotropy in the entanglement generated by expanding universe on spin 0 and 1/2 fields. For massive scalar field we find revivals of entanglement entropy vs momentum after decreasing from the maximum at k = 0. In massive Dirac field the effect is a slight distortion of the non-monotonic pr... |
2208.04906 | Vyacheslav Dokuchaev | Victor A. Berezin and Vyacheslav I. Dokuchaev | Weyl geometry and cosmological particle creation | 20 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These are lectures for students at the summer school conducted by the Faculty
of Fundamental Sciences, Bauman Moscow State Technical University at 2022.
| [
{
"created": "Tue, 9 Aug 2022 17:06:35 GMT",
"version": "v1"
}
] | 2022-08-10 | [
[
"Berezin",
"Victor A.",
""
],
[
"Dokuchaev",
"Vyacheslav I.",
""
]
] | These are lectures for students at the summer school conducted by the Faculty of Fundamental Sciences, Bauman Moscow State Technical University at 2022. |
1706.10091 | Oliver J. Tattersall | Oliver J. Tattersall, Macarena Lagos, Pedro G. Ferreira | A covariant approach to parameterised cosmological perturbations | Updated to match published version | Phys. Rev. D Volume 96 Issue 6 (2017) | 10.1103/PhysRevD.96.064011 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a covariant formulation for constructing general quadratic actions
for cosmological perturbations, invariant under a given set of gauge symmetries
for a given field content. This approach allows us to analyse scalar, vector
and tensor perturbations at the same time in a straightforward manner. We apply
the... | [
{
"created": "Fri, 30 Jun 2017 09:49:17 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Sep 2017 08:36:40 GMT",
"version": "v2"
}
] | 2017-09-13 | [
[
"Tattersall",
"Oliver J.",
""
],
[
"Lagos",
"Macarena",
""
],
[
"Ferreira",
"Pedro G.",
""
]
] | We present a covariant formulation for constructing general quadratic actions for cosmological perturbations, invariant under a given set of gauge symmetries for a given field content. This approach allows us to analyse scalar, vector and tensor perturbations at the same time in a straightforward manner. We apply the p... |
1404.0092 | Nicholas Loutrel | Nicholas Loutrel, Nicolas Yunes, Frans Pretorius | A Parametrized post-Einsteinian Framework for Gravitational Wave Bursts | 20 pages, 2 figures. Replacement of previous version. Added erratum | Phys. Rev. D 96, 089901 (2017) | 10.1103/PhysRevD.90.104010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The population of stellar-mass, compact object binaries that merge with
non-negligible eccentricity may be large enough to motivate searches with
ground-based gravitational wave detectors. Such events could be exceptional
laboratories to test General Relativity in the dynamical, strong-field regime,
as a larger fract... | [
{
"created": "Tue, 1 Apr 2014 00:59:31 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Oct 2014 17:52:19 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Oct 2017 18:30:19 GMT",
"version": "v3"
}
] | 2017-10-11 | [
[
"Loutrel",
"Nicholas",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Pretorius",
"Frans",
""
]
] | The population of stellar-mass, compact object binaries that merge with non-negligible eccentricity may be large enough to motivate searches with ground-based gravitational wave detectors. Such events could be exceptional laboratories to test General Relativity in the dynamical, strong-field regime, as a larger fractio... |
0907.1015 | Yuri Levin | Bruin Benthem (Lorentz Institute) and Yuri Levin (Leiden Observatory
and Lorentz Institute) | Thermo-refractive and thermo-chemical noise in the beamsplitter of
GEO600 gravitational-wave interferometer | 5 pages, submitted to Phys. Rev. D | Phys.Rev.D80:062004,2009 | 10.1103/PhysRevD.80.062004 | null | gr-qc astro-ph.IM physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Braginsky, Gorodetsky, and Vyatchanin have shown that thermo-refractive
fluctuations are an important source of noise in interferometric
gravitational-wave detectors. In particular, the thermo-refractive noise in the
GEO600 beamsplitter is expected to make a substantial contribution to the
interferometer's total nois... | [
{
"created": "Mon, 6 Jul 2009 15:33:43 GMT",
"version": "v1"
}
] | 2010-02-22 | [
[
"Benthem",
"Bruin",
"",
"Lorentz Institute"
],
[
"Levin",
"Yuri",
"",
"Leiden Observatory\n and Lorentz Institute"
]
] | Braginsky, Gorodetsky, and Vyatchanin have shown that thermo-refractive fluctuations are an important source of noise in interferometric gravitational-wave detectors. In particular, the thermo-refractive noise in the GEO600 beamsplitter is expected to make a substantial contribution to the interferometer's total noise ... |
1512.05277 | Xiao-Kan Guo | Xiao-Kan Guo | Black hole thermodynamics from decoherence | v1:11 pages. v2:12 pages, new references are added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an approach to the four laws of black hole thermodynamics by
utilizing the thermodynamics of quantum coherence. Firstly, Hawking effect is
attributed to the decoherence of the two-mode squeezed state in a black hole
spacetime. Then use is made of the relative entropy between undecohered and
decohered squee... | [
{
"created": "Tue, 15 Dec 2015 04:05:51 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 2016 15:18:14 GMT",
"version": "v2"
}
] | 2016-12-07 | [
[
"Guo",
"Xiao-Kan",
""
]
] | We present an approach to the four laws of black hole thermodynamics by utilizing the thermodynamics of quantum coherence. Firstly, Hawking effect is attributed to the decoherence of the two-mode squeezed state in a black hole spacetime. Then use is made of the relative entropy between undecohered and decohered squeeze... |
gr-qc/0002050 | Andrzej Woszczyna | Zdzislaw A. Golda, Andrzej Woszczyna | Acoustics of early universe. I. Flat versus open universe models | The new version extended by 2 sections. Changes in notation. Some
important comments added | Class.Quant.Grav. 18 (2001) 543-554 | 10.1088/0264-9381/18/3/313 | null | gr-qc astro-ph | null | A simple perturbation description unique for all signs of curvature, and
based on the gauge-invariant formalisms is proposed to demonstrate that:
(1) The density perturbations propagate in the flat radiation-dominated
universe in exactly the same way as electromagnetic or gravitational waves
propagate in the epoch ... | [
{
"created": "Tue, 15 Feb 2000 11:44:59 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 2000 18:37:35 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Golda",
"Zdzislaw A.",
""
],
[
"Woszczyna",
"Andrzej",
""
]
] | A simple perturbation description unique for all signs of curvature, and based on the gauge-invariant formalisms is proposed to demonstrate that: (1) The density perturbations propagate in the flat radiation-dominated universe in exactly the same way as electromagnetic or gravitational waves propagate in the epoch of t... |
gr-qc/0603123 | Alex Rivero E | Alejandro Rivero | Some bounds extracted from a quantum of area | 10 pages, no figures | null | null | null | gr-qc | null | Asking very elementary relativistic quantum mechanics to meet quantums of
area and time, it is possible to observe at a general level: a) the seesaw
bound for the mass of neutrinos, and b) the need of a gauge group at energies
below Planck mass.
| [
{
"created": "Thu, 30 Mar 2006 12:03:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rivero",
"Alejandro",
""
]
] | Asking very elementary relativistic quantum mechanics to meet quantums of area and time, it is possible to observe at a general level: a) the seesaw bound for the mass of neutrinos, and b) the need of a gauge group at energies below Planck mass. |
2010.03033 | Genly Le\'on | Genly Leon (Catolica del Norte U.), Alfredo Millano (Catolica del
Norte U.), Joey Latta (Dalhousie U., Math. Dept.) | Einstein-aether models III: conformally static metrics, perfect fluid
and scalar fields | 39 pages, 15 compound figures | Eur. Phys. J. C (2020) 80:1192 | 10.1140/epjc/s10052-020-08731-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic properties of conformally static metrics in Einstein-aether
theory with a perfect fluid source and a scalar field are analyzed. In case of
perfect fluid, some relativistic solutions are recovered such as: Minkowski
spacetime, the Kasner solution, a flat FLRW space and static orbits depending
on the bar... | [
{
"created": "Tue, 6 Oct 2020 21:07:57 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2021 23:32:22 GMT",
"version": "v2"
}
] | 2021-01-11 | [
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
],
[
"Millano",
"Alfredo",
"",
"Catolica del\n Norte U."
],
[
"Latta",
"Joey",
"",
"Dalhousie U., Math. Dept."
]
] | The asymptotic properties of conformally static metrics in Einstein-aether theory with a perfect fluid source and a scalar field are analyzed. In case of perfect fluid, some relativistic solutions are recovered such as: Minkowski spacetime, the Kasner solution, a flat FLRW space and static orbits depending on the barot... |
gr-qc/0409088 | Kayll Lake | Benjamin K. Tippett and Kayll Lake | Energy conditions and a bounce in FLRW cosmologies | 4 pages revtex4 | null | null | null | gr-qc astro-ph | null | Exploiting the existence of two "cosmological" constants, one associated with
the classical Lovelock theorem and one with the vacuum energy density, we
argue, in a model independent way, that in spatially closed FLRW cosmologies
with a positive definite effective cosmological constant there exists a range
in this con... | [
{
"created": "Wed, 22 Sep 2004 22:12:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tippett",
"Benjamin K.",
""
],
[
"Lake",
"Kayll",
""
]
] | Exploiting the existence of two "cosmological" constants, one associated with the classical Lovelock theorem and one with the vacuum energy density, we argue, in a model independent way, that in spatially closed FLRW cosmologies with a positive definite effective cosmological constant there exists a range in this const... |
2303.13717 | Shinji Tsujikawa | Katsuki Aoki, Shinji Tsujikawa | Coupled vector Gauss-Bonnet theories and hairy black holes | 16 pages, 2 figures | Phys. Lett. B 843 (2023) 138022 | 10.1016/j.physletb.2023.138022 | YITP-23-38, WUCG-23-03 | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We study vector-tensor theories in which a 4-dimensional vector field
$A_{\mu}$ is coupled to a vector quantity ${\cal J}^{\mu}$, which is expressed
in terms of $A_{\mu}$ and a metric tensor $g_{\mu \nu}$. The divergence of
${\cal J}^{\mu}$ is equivalent to a Gauss-Bonnet (GB) term. We show that an
interacting Lagran... | [
{
"created": "Fri, 24 Mar 2023 00:01:30 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jun 2023 00:04:56 GMT",
"version": "v2"
}
] | 2023-06-23 | [
[
"Aoki",
"Katsuki",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | We study vector-tensor theories in which a 4-dimensional vector field $A_{\mu}$ is coupled to a vector quantity ${\cal J}^{\mu}$, which is expressed in terms of $A_{\mu}$ and a metric tensor $g_{\mu \nu}$. The divergence of ${\cal J}^{\mu}$ is equivalent to a Gauss-Bonnet (GB) term. We show that an interacting Lagrangi... |
2005.08428 | Katsuki Aoki | Katsuki Aoki, Mohammad Ali Gorji, and Shinji Mukohyama | Cosmology and gravitational waves in consistent $D\to 4$
Einstein-Gauss-Bonnet gravity | 18 pages, no figures, new subsection added, accepted for publication
in JCAP, observational constraints corrected | null | null | YITP-20-72, IPMU20-0058 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a very recent paper [1], we have proposed a novel $4$-dimensional
gravitational theory with two dynamical degrees of freedom, which serves as a
consistent realization of $D\to4$ Einstein-Gauss-Bonnet gravity with the
rescaled Gauss-Bonnet coupling constant $\tilde{\alpha}$. This has been made
possible by breaking ... | [
{
"created": "Mon, 18 May 2020 02:35:53 GMT",
"version": "v1"
},
{
"created": "Mon, 25 May 2020 08:22:38 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Aug 2020 02:50:13 GMT",
"version": "v3"
},
{
"created": "Wed, 28 Apr 2021 04:44:20 GMT",
"version": "v4"
}
] | 2021-04-29 | [
[
"Aoki",
"Katsuki",
""
],
[
"Gorji",
"Mohammad Ali",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | In a very recent paper [1], we have proposed a novel $4$-dimensional gravitational theory with two dynamical degrees of freedom, which serves as a consistent realization of $D\to4$ Einstein-Gauss-Bonnet gravity with the rescaled Gauss-Bonnet coupling constant $\tilde{\alpha}$. This has been made possible by breaking a ... |
2011.08005 | Alesandro Santos | J. S. Gon\c{c}alves and A. F. Santos | A study on causality in $f(R,\phi,X)$ theory | 14 pages, accepted for publication in IJMPA | null | 10.1142/S0217751X21500093 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The $k$-essence modified $f(R)$ gravity model, i.e., $f(R,\phi,X)$ theory is
studied. The question of violation of causality, in the framework of
G\"{o}del-type universes, is investigated in this gravitational model. Causal
and non-causal solutions are allowed. A critical radius for non-causal solution
is calculated.... | [
{
"created": "Mon, 16 Nov 2020 14:51:08 GMT",
"version": "v1"
}
] | 2021-02-17 | [
[
"Gonçalves",
"J. S.",
""
],
[
"Santos",
"A. F.",
""
]
] | The $k$-essence modified $f(R)$ gravity model, i.e., $f(R,\phi,X)$ theory is studied. The question of violation of causality, in the framework of G\"{o}del-type universes, is investigated in this gravitational model. Causal and non-causal solutions are allowed. A critical radius for non-causal solution is calculated. I... |
1109.1694 | C. Q. Geng | Kazuharu Bamba and Chao-Qiang Geng | Thermodynamics of cosmological horizons in $f(T)$ gravity | 18 pages, no figure, version accepted for publication in JCAP | null | 10.1088/1475-7516/2011/11/008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore thermodynamics of the apparent horizon in $f(T)$ gravity with both
equilibrium and non-equilibrium descriptions. We find the same dual
equilibrium/non-equilibrium formulation for $f(T)$ as for $f(R)$ gravity. In
particular, we show that the second law of thermodynamics can be satisfied for
the universe wit... | [
{
"created": "Thu, 8 Sep 2011 11:52:45 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Oct 2011 10:39:21 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Bamba",
"Kazuharu",
""
],
[
"Geng",
"Chao-Qiang",
""
]
] | We explore thermodynamics of the apparent horizon in $f(T)$ gravity with both equilibrium and non-equilibrium descriptions. We find the same dual equilibrium/non-equilibrium formulation for $f(T)$ as for $f(R)$ gravity. In particular, we show that the second law of thermodynamics can be satisfied for the universe with ... |
1508.03343 | Ivica Smoli\'c | Maro Cvitan, Predrag Dominis Prester, Ivica Smoli\'c | Does three dimensional electromagnetic field inherit the spacetime
symmetries? | 10 pages; published version (some comments and references added) | Class. Quantum Grav. 33 (2016) 077001 | 10.1088/0264-9381/33/7/077001 | ZTF-EP-15-04 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that the electromagnetic field in a (1+2)-dimensional spacetime
necessarily inherits the symmetries of the spacetime metric in a large class of
generalized Einstein-Maxwell theories. The Lagrangians of the studied theories
have general diff-covariant gravitational part and include both the
gravitational and ... | [
{
"created": "Thu, 13 Aug 2015 20:10:26 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2016 21:22:10 GMT",
"version": "v2"
}
] | 2016-03-30 | [
[
"Cvitan",
"Maro",
""
],
[
"Prester",
"Predrag Dominis",
""
],
[
"Smolić",
"Ivica",
""
]
] | We prove that the electromagnetic field in a (1+2)-dimensional spacetime necessarily inherits the symmetries of the spacetime metric in a large class of generalized Einstein-Maxwell theories. The Lagrangians of the studied theories have general diff-covariant gravitational part and include both the gravitational and th... |
2003.03366 | Adrien Kuntz | Adrien Kuntz | Half-solution to the two-body problem in General Relativity | 16 pages, 6 figures. More detailed version accepted in PRD | Phys. Rev. D 102, 064019 (2020) | 10.1103/PhysRevD.102.064019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the introduction of two worldline parameters defines a different
approach to computations in the effective field theory approach to the two-body
problem in General Relativity and present some preliminary evidence for a
reduction in computational complexity. These parameters obey a polynomial
equation who... | [
{
"created": "Fri, 6 Mar 2020 18:55:34 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Aug 2020 13:48:11 GMT",
"version": "v2"
}
] | 2020-09-16 | [
[
"Kuntz",
"Adrien",
""
]
] | We show that the introduction of two worldline parameters defines a different approach to computations in the effective field theory approach to the two-body problem in General Relativity and present some preliminary evidence for a reduction in computational complexity. These parameters obey a polynomial equation whose... |
1501.02837 | Mahdi Godazgar | Gabriel Bernardi de Freitas, Mahdi Godazgar, Harvey S. Reall | Uniqueness of the Kerr-de Sitter spacetime as an algebraically special
solution in five dimensions | 30 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the most general solution of the five-dimensional vacuum
Einstein equation, allowing for a cosmological constant, with (i) a Weyl tensor
that is type II or more special in the classification of Coley et al., (ii) a
non-degenerate "optical matrix" encoding the expansion, rotation and shear of
the aligned ... | [
{
"created": "Mon, 12 Jan 2015 21:56:44 GMT",
"version": "v1"
}
] | 2015-01-14 | [
[
"de Freitas",
"Gabriel Bernardi",
""
],
[
"Godazgar",
"Mahdi",
""
],
[
"Reall",
"Harvey S.",
""
]
] | We determine the most general solution of the five-dimensional vacuum Einstein equation, allowing for a cosmological constant, with (i) a Weyl tensor that is type II or more special in the classification of Coley et al., (ii) a non-degenerate "optical matrix" encoding the expansion, rotation and shear of the aligned nu... |
gr-qc/9506073 | null | Hugo A. Morales-Tecotl and Giampiero Esposito | Self-Dual Action for Fermionic Fields and Gravitation | 13 pages, plain-tex, recently appearing in Nuovo Cimento B, volume
109, pages 973-982, September 1994 | NuovoCim.B109:973-982,1994 | 10.1007/BF02726144 | DSF 94/23 | gr-qc | null | This paper studies the self-dual Einstein-Dirac theory. A generalization is
obtained of the Jacobson-Smolin proof of the equivalence between the self-dual
and Palatini purely gravitational actions. Hence one proves equivalence of
self-dual Einstein-Dirac theory to the Einstein-Cartan-Sciama-Kibble-Dirac
theory. The B... | [
{
"created": "Thu, 29 Jun 1995 09:39:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Morales-Tecotl",
"Hugo A.",
""
],
[
"Esposito",
"Giampiero",
""
]
] | This paper studies the self-dual Einstein-Dirac theory. A generalization is obtained of the Jacobson-Smolin proof of the equivalence between the self-dual and Palatini purely gravitational actions. Hence one proves equivalence of self-dual Einstein-Dirac theory to the Einstein-Cartan-Sciama-Kibble-Dirac theory. The Bia... |
1312.0784 | Francisco Lobo | Salvatore Capozziello, Francisco S. N. Lobo, Jos\'e P. Mimoso | Energy conditions in modified gravity | 4 pages. V2: 5 pages; version to appear in Physics Letters B. V3:
typo in Eq. (4) corrected | Phys.Lett.B730:280-283,2014 | 10.1016/j.physletb.2014.01.066 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider generalized energy conditions in modified theories of gravity by
taking into account the further degrees of freedom related to scalar fields and
curvature invariants. The latter are usually recast as generalized {\it
geometrical fluids} that have different meanings with respect to the standard
matter flui... | [
{
"created": "Tue, 3 Dec 2013 11:52:41 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2014 10:41:44 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Feb 2014 15:02:00 GMT",
"version": "v3"
}
] | 2014-02-14 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Mimoso",
"José P.",
""
]
] | We consider generalized energy conditions in modified theories of gravity by taking into account the further degrees of freedom related to scalar fields and curvature invariants. The latter are usually recast as generalized {\it geometrical fluids} that have different meanings with respect to the standard matter fluids... |
2111.11596 | Changjun Gao | Changjun Gao | New understanding of Majumdar-Papapetrou and Perj\'es-Israel-Wilson
solutions | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hartle and Hawking have shown that, except for the case of only point
monopoles as sources, both the Majumdar-Papapetrou and the
Perj\'es-Israel-Wilson solutions have naked singularities if the space is
asymptotically flat. In this article, by using the method of introducing
interior solutions, these naked singularit... | [
{
"created": "Tue, 23 Nov 2021 00:59:42 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Nov 2021 06:27:12 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Jan 2022 09:25:57 GMT",
"version": "v3"
},
{
"created": "Tue, 8 Feb 2022 22:51:19 GMT",
"version": "v4"
},
{
"cr... | 2022-04-18 | [
[
"Gao",
"Changjun",
""
]
] | Hartle and Hawking have shown that, except for the case of only point monopoles as sources, both the Majumdar-Papapetrou and the Perj\'es-Israel-Wilson solutions have naked singularities if the space is asymptotically flat. In this article, by using the method of introducing interior solutions, these naked singularitie... |
1603.01655 | Ahmad Borzou | Ahmad Borzou | A Macroscopically Effective Lorentz Gauge Theory of Gravity | 17 pages, 2 figures, accepted for publication in CQG | Classical and Quantum Gravity, 33 (2016) 235006 | 10.1088/0264-9381/33/23/235006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following the ideas of effective field theories, we derive classically
effective field equations of recently developed Lorentz gauge theory of
gravity. It is shown that Newton's gravitational constant emerges as an
effective coupling parameter if an extremely small length is integrated out of
the underlying theory. T... | [
{
"created": "Fri, 4 Mar 2016 23:25:09 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Oct 2016 11:22:28 GMT",
"version": "v2"
}
] | 2016-11-01 | [
[
"Borzou",
"Ahmad",
""
]
] | Following the ideas of effective field theories, we derive classically effective field equations of recently developed Lorentz gauge theory of gravity. It is shown that Newton's gravitational constant emerges as an effective coupling parameter if an extremely small length is integrated out of the underlying theory. The... |
gr-qc/0404099 | Brendan Foster | Edward Anderson, Julian Barbour, Brendan Z. Foster, Bryan Kelleher,
and Niall O'Murchadha | A first-principles derivation of York scaling and the Lichnerowicz-York
equation | 4 pages | null | null | null | gr-qc | null | The only efficient and robust method of generating consistent initial data in
general relativity is the conformal technique initiated by Lichnerowicz and
perfected by York. In the spatially compact case, the complete scheme consists
of the Arnowitt-Deser-Misner (ADM) Hamiltonian and momentum constraints, the
ADM Eule... | [
{
"created": "Thu, 22 Apr 2004 15:53:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anderson",
"Edward",
""
],
[
"Barbour",
"Julian",
""
],
[
"Foster",
"Brendan Z.",
""
],
[
"Kelleher",
"Bryan",
""
],
[
"O'Murchadha",
"Niall",
""
]
] | The only efficient and robust method of generating consistent initial data in general relativity is the conformal technique initiated by Lichnerowicz and perfected by York. In the spatially compact case, the complete scheme consists of the Arnowitt-Deser-Misner (ADM) Hamiltonian and momentum constraints, the ADM Euler-... |
gr-qc/0301077 | Jose Geraldo Pereira | R. Aldrovandi, P. B. Barros, J. G. Pereira | Gravitation as Anholonomy | RevTeX4, 10 pages, no figures. To appear in Gen. Rel. Grav | Gen.Rel.Grav. 35 (2003) 991-1005 | 10.1023/A:1024060732690 | null | gr-qc | null | A gravitational field can be seen as the anholonomy of the tetrad fields.
This is more explicit in the teleparallel approach, in which the gravitational
field-strength is the torsion of the ensuing Weitzenboeck connection. In a
tetrad frame, that torsion is just the anholonomy of that frame. The infinitely
many tetra... | [
{
"created": "Tue, 21 Jan 2003 13:11:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Aldrovandi",
"R.",
""
],
[
"Barros",
"P. B.",
""
],
[
"Pereira",
"J. G.",
""
]
] | A gravitational field can be seen as the anholonomy of the tetrad fields. This is more explicit in the teleparallel approach, in which the gravitational field-strength is the torsion of the ensuing Weitzenboeck connection. In a tetrad frame, that torsion is just the anholonomy of that frame. The infinitely many tetrad ... |
2312.15991 | Andrzej Okolow | Andrzej Okolow | Constraints of the Teleparallel Equivalent of General Relativity in a
gauge | 32 pages, no figure, LaTeX, the paper substantially rewritten | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a specific Hamiltonian formulation of the Teleparallel Equivalent
of General Relativity, where the canonical variables are expressed by means of
differential forms. We show that some ``position'' variables of this
formulation can be always gauge-transformed to zero. In this gauge the
constraints of the th... | [
{
"created": "Tue, 26 Dec 2023 10:45:29 GMT",
"version": "v1"
},
{
"created": "Wed, 22 May 2024 14:49:02 GMT",
"version": "v2"
}
] | 2024-05-24 | [
[
"Okolow",
"Andrzej",
""
]
] | We consider a specific Hamiltonian formulation of the Teleparallel Equivalent of General Relativity, where the canonical variables are expressed by means of differential forms. We show that some ``position'' variables of this formulation can be always gauge-transformed to zero. In this gauge the constraints of the theo... |
gr-qc/0405028 | Aleks Kleyn | Aleks Kleyn | Metric-Affine Manifold | English text - 20 pages; Russian text - 21 pages; 1 figure. (revised
v3): Added Lie derivative of the connection | null | null | null | gr-qc math.DG | null | We call a manifold with torsion and nonmetricity the metric-affine manifold.
The nonmetricity leads to a difference between the auto parallel line and the
extreme line, and to a change in the expression of the Frenet transport and
moving basis. The torsion leads to a change in the Killing equation. We also
need to ad... | [
{
"created": "Thu, 6 May 2004 03:48:56 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jun 2004 04:07:50 GMT",
"version": "v2"
},
{
"created": "Sat, 24 Jul 2004 04:07:44 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Dec 2004 00:05:16 GMT",
"version": "v4"
},
{
"cre... | 2008-02-29 | [
[
"Kleyn",
"Aleks",
""
]
] | We call a manifold with torsion and nonmetricity the metric-affine manifold. The nonmetricity leads to a difference between the auto parallel line and the extreme line, and to a change in the expression of the Frenet transport and moving basis. The torsion leads to a change in the Killing equation. We also need to add ... |
gr-qc/0510119 | Jeanette E. Nelson | L. Chekhov (Steklov Mathematical Institute and Institute for
Experimental and Theoretical Physics, Moscow, Russia), J.E.Nelson
(Universita` and INFN, Torino, Italy) and T. Regge (Politecnico di Torino,
Torino, Italy) | Extension of geodesic algebras to continuous genus | 16 pages, submitted to Lett.Math.Phys | Lett.Math.Phys. 78 (2006) 17-26 | 10.1007/s11005-006-0112-4 | null | gr-qc hep-th math-ph math.MP | null | Using the Penner--Fock parameterization for Teichmuller spaces of Riemann
surfaces with holes, we construct the string-like free-field representation of
the Poisson and quantum algebras of geodesic functions in the continuous-genus
limit. The mapping class group acts naturally in the obtained representation.
| [
{
"created": "Fri, 28 Oct 2005 16:51:43 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Chekhov",
"L.",
"",
"Steklov Mathematical Institute and Institute for\n Experimental and Theoretical Physics, Moscow, Russia"
],
[
"Nelson",
"J. E.",
"",
"Universita` and INFN, Torino, Italy"
],
[
"Regge",
"T.",
"",
"Politecnico di Torino,\n Torino, Italy... | Using the Penner--Fock parameterization for Teichmuller spaces of Riemann surfaces with holes, we construct the string-like free-field representation of the Poisson and quantum algebras of geodesic functions in the continuous-genus limit. The mapping class group acts naturally in the obtained representation. |
2206.11097 | George Macaulay Mr | George Macaulay | Linear Newman-Penrose charges as subleading BMS and dual BMS charges | 26 pages | null | 10.1088/1402-4896/aca0cf | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we further develop previous work on asymptotically flat
spacetimes and extend subleading BMS and dual BMS charges in a large $r$
expansion to all orders in $r^{-1}$. This forms a complete account of this
prescription in relation to the previously discovered Newman-Penrose charges.
We provide an explana... | [
{
"created": "Wed, 22 Jun 2022 13:55:31 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jun 2022 15:08:44 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Nov 2022 11:02:02 GMT",
"version": "v3"
},
{
"created": "Tue, 25 Apr 2023 11:27:12 GMT",
"version": "v4"
}
] | 2023-04-26 | [
[
"Macaulay",
"George",
""
]
] | In this paper, we further develop previous work on asymptotically flat spacetimes and extend subleading BMS and dual BMS charges in a large $r$ expansion to all orders in $r^{-1}$. This forms a complete account of this prescription in relation to the previously discovered Newman-Penrose charges. We provide an explanati... |
gr-qc/0205075 | Vishwakarma R. G. | R. G. Vishwakarma | A Machian Model of Dark Energy | Received an Honorable mention in the Essay Contest-2002 sponsored by
the Gravity Research Foundation; A paragraph added on how the model can
explain the CMB anisotropy observations; To appear in the Classical and
Quantum Gravity | Class.Quant.Grav.19:4747-4752,2002 | 10.1088/0264-9381/19/18/309 | null | gr-qc astro-ph | null | Einstein believed that Mach's principle should play a major role in finding a
meaningful spacetime geometry, though it was discovered later that his field
equations gave some solutions which were not Machian. It is shown, in this
essay, that the kinematical $\Lambda$ models, which are invoked to solve the
cosmologica... | [
{
"created": "Fri, 17 May 2002 08:10:39 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Aug 2002 15:08:21 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Vishwakarma",
"R. G.",
""
]
] | Einstein believed that Mach's principle should play a major role in finding a meaningful spacetime geometry, though it was discovered later that his field equations gave some solutions which were not Machian. It is shown, in this essay, that the kinematical $\Lambda$ models, which are invoked to solve the cosmological ... |
1807.08270 | Xiang-Hua Zhai | Xin-zhou Li, Xiang-hua Zhai, Ping Li | Generalized Birkhoff theorem and its applications in mimetic gravity | 11 pages | null | null | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is undetermined potential function $V(\phi)$ in the action of mimetic
gravity which should be resolved through physical means. In general
relativity(GR), the static spherically symmetric(SSS) solution to the Einstein
equation is a benchmark and its deformation also plays a crucial role in
mimetic gravity. The e... | [
{
"created": "Sun, 22 Jul 2018 10:55:40 GMT",
"version": "v1"
}
] | 2018-07-24 | [
[
"Li",
"Xin-zhou",
""
],
[
"Zhai",
"Xiang-hua",
""
],
[
"Li",
"Ping",
""
]
] | There is undetermined potential function $V(\phi)$ in the action of mimetic gravity which should be resolved through physical means. In general relativity(GR), the static spherically symmetric(SSS) solution to the Einstein equation is a benchmark and its deformation also plays a crucial role in mimetic gravity. The equ... |
2402.18791 | Krishnakanta Bhattacharya | Krishnakanta Bhattacharya, Kazuharu Bamba, and Douglas Singleton | Topological interpretation of extremal and Davies-type phase transitions
of black holes | 19 pages, Two figures, To appear in PLB | Phys. Lett. B 854 (2024) 138722 | 10.1016/j.physletb.2024.138722 | Local Report number: FU-PCG-132 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Topological arguments are currently being used as a novel scheme to discern
the properties of black holes while ignoring their detailed structure and
specific field equations. Among various avenues of black hole physics, where
this novel approach is being utilized, the phase transition in black hole
thermodynamics li... | [
{
"created": "Thu, 29 Feb 2024 01:39:32 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2024 07:48:46 GMT",
"version": "v2"
}
] | 2024-05-22 | [
[
"Bhattacharya",
"Krishnakanta",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Singleton",
"Douglas",
""
]
] | Topological arguments are currently being used as a novel scheme to discern the properties of black holes while ignoring their detailed structure and specific field equations. Among various avenues of black hole physics, where this novel approach is being utilized, the phase transition in black hole thermodynamics lies... |
1504.05914 | Jesse Cresswell | Jesse C. Cresswell and Dan N. Vollick | Lorenz gauge quantization in conformally flat spacetimes | 8 pages | Phys. Rev. D 91, 084008 (2015) | 10.1103/PhysRevD.91.084008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it was shown that Dirac's method of quantizing constrained dynamical
systems can be used to impose the Lorenz gauge condition in a four-dimensional
cosmological spacetime. In this paper we use Dirac's method to impose the
Lorenz gauge condition in a general four-dimensional conformally flat spacetime
and fin... | [
{
"created": "Wed, 22 Apr 2015 18:32:13 GMT",
"version": "v1"
}
] | 2015-04-23 | [
[
"Cresswell",
"Jesse C.",
""
],
[
"Vollick",
"Dan N.",
""
]
] | Recently it was shown that Dirac's method of quantizing constrained dynamical systems can be used to impose the Lorenz gauge condition in a four-dimensional cosmological spacetime. In this paper we use Dirac's method to impose the Lorenz gauge condition in a general four-dimensional conformally flat spacetime and find ... |
1507.07722 | Orfeu Bertolami | O. Bertolami and P. Leal | Aspects of Phase-Space Noncommutative Quantum Mechanics | 16 pages, no figures | null | 10.1016/j.physletb.2015.08.024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work some issues in the context of Noncommutative Quantum Mechanics
(NCQM) are addressed. The main focus is on finding whether symmetries present
in Quantum Mechanics still hold in the phase-space noncommutative version. In
particular, the issues related with gauge invariance of the electromagnetic
field and ... | [
{
"created": "Tue, 28 Jul 2015 10:59:06 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Bertolami",
"O.",
""
],
[
"Leal",
"P.",
""
]
] | In this work some issues in the context of Noncommutative Quantum Mechanics (NCQM) are addressed. The main focus is on finding whether symmetries present in Quantum Mechanics still hold in the phase-space noncommutative version. In particular, the issues related with gauge invariance of the electromagnetic field and th... |
gr-qc/0505043 | Jorge Pullin | Rodolfo Gambini, Marcelo Ponce, Jorge Pullin | Consistent discretizations: the Gowdy spacetimes | 10 pages, 8 figures | Phys.Rev. D72 (2005) 024031 | 10.1103/PhysRevD.72.024031 | LSU-REL-051005 | gr-qc | null | We apply the consistent discretization scheme to general relativity
particularized to the Gowdy space-times. This is the first time the framework
has been applied in detail in a non-linear generally-covariant gravitational
situation with local degrees of freedom. We show that the scheme can be
correctly used to numer... | [
{
"created": "Tue, 10 May 2005 17:04:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Ponce",
"Marcelo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We apply the consistent discretization scheme to general relativity particularized to the Gowdy space-times. This is the first time the framework has been applied in detail in a non-linear generally-covariant gravitational situation with local degrees of freedom. We show that the scheme can be correctly used to numeric... |
2108.12414 | Jorge Gigante Valcarcel | Sebastian Bahamonde, Jorge Gigante Valcarcel | Rotating Kerr-Newman space-times in Metric-Affine Gravity | 13 pages, 0 figures, minor changes, references added. It matches the
version published in JCAP | null | 10.1088/1475-7516/2022/01/011 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new rotating vacuum configurations endowed with both dynamical
torsion and nonmetricity fields in the framework of Metric-Affine gauge theory
of gravity. For this task, we consider scalar-flat Weyl-Cartan geometries and
obtain an axisymmetric Kerr-Newman solution in the decoupling limit between the
orbital... | [
{
"created": "Fri, 27 Aug 2021 17:46:38 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jan 2022 04:01:45 GMT",
"version": "v2"
}
] | 2022-01-12 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Valcarcel",
"Jorge Gigante",
""
]
] | We present new rotating vacuum configurations endowed with both dynamical torsion and nonmetricity fields in the framework of Metric-Affine gauge theory of gravity. For this task, we consider scalar-flat Weyl-Cartan geometries and obtain an axisymmetric Kerr-Newman solution in the decoupling limit between the orbital a... |
1109.5618 | Mercedes Martin-Benito | Mercedes Mart\'in-Benito | Cosmolog\'ia Cu\'antica de Lazos: Anisotrop\'ias e Inhomogeneidades | PhD. Thesis 2010, in Spanish (summary and conclusions in English),
225 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Quantum Cosmology adapts the techniques of Loop Quantum Gravity in the
quantization of homogeneous cosmological models obtained from General
Relativity by symmetry reduction. As a necessary step towards the extraction of
realistic results from Loop Quantum Cosmology, we should consider the inclusion
of inhomogen... | [
{
"created": "Mon, 26 Sep 2011 15:54:34 GMT",
"version": "v1"
}
] | 2011-09-27 | [
[
"Martín-Benito",
"Mercedes",
""
]
] | Loop Quantum Cosmology adapts the techniques of Loop Quantum Gravity in the quantization of homogeneous cosmological models obtained from General Relativity by symmetry reduction. As a necessary step towards the extraction of realistic results from Loop Quantum Cosmology, we should consider the inclusion of inhomogenei... |
gr-qc/0401122 | John D. Swain | John Swain | The Pauli Exclusion Principle and SU(2) Versus SO(3) in Loop Quantum
Gravity | An earlier paper (gr-qc/0305073) with a slightly different title
received an "honorable mention" in the 2003 Essay Competition of the Gravity
Research Foundation. This paper argues from geometric quantization for a
spin-statistics connection even when the SU(2) under consideration to define
``spin'' is not that... | Int.J.Mod.Phys. D12 (2003) 729 | null | null | gr-qc | null | Recent attempts to resolve the ambiguity in the loop quantum gravity
description of the quantization of area has led to the idea that $j=1$ edges of
spin-networks dominate in their contribution to black hole areas as opposed to
$j=1/2$ which would naively be expected. This suggests that the true gauge
group involved ... | [
{
"created": "Thu, 29 Jan 2004 21:00:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Swain",
"John",
""
]
] | Recent attempts to resolve the ambiguity in the loop quantum gravity description of the quantization of area has led to the idea that $j=1$ edges of spin-networks dominate in their contribution to black hole areas as opposed to $j=1/2$ which would naively be expected. This suggests that the true gauge group involved mi... |
2004.12138 | Yves Brihaye | Y. Brihaye, J. Renaux | Scalarized-charged wormholes in Einstein-Gauss-Bonnet gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Maxwell-Klein-Gordon Lagrangian is supplemented by a non-minimal
coupling of the real scalar field to the Gauss-Bonnet invariant. The non
minimal coupling function is chosen as a general second degree polynomial in
the scalar field for which the system is known to admit hairy black holes. The
new interac... | [
{
"created": "Sat, 25 Apr 2020 13:15:30 GMT",
"version": "v1"
}
] | 2020-04-28 | [
[
"Brihaye",
"Y.",
""
],
[
"Renaux",
"J.",
""
]
] | The Einstein-Maxwell-Klein-Gordon Lagrangian is supplemented by a non-minimal coupling of the real scalar field to the Gauss-Bonnet invariant. The non minimal coupling function is chosen as a general second degree polynomial in the scalar field for which the system is known to admit hairy black holes. The new interacti... |
2304.08520 | Zhen Zhong | Vitor Cardoso, Jo\~ao L. Costa, Jos\'e Nat\'ario, Zhen Zhong | Message in a bottle: energy extraction from bouncing geometries | 6 pages, 3 figures. v2: references added | null | 10.1103/PhysRevD.108.024071 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity phenomenology suggests the interesting possibility that black
holes are not eternal. Collapse could be halted by some unknown mechanism, or
Hawking radiation might leave behind a regular spacetime. Here we investigate a
simple bouncing geometry, with (outer and inner) apparent horizons but no event
ho... | [
{
"created": "Mon, 17 Apr 2023 18:00:04 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Apr 2023 15:12:28 GMT",
"version": "v2"
}
] | 2023-08-09 | [
[
"Cardoso",
"Vitor",
""
],
[
"Costa",
"João L.",
""
],
[
"Natário",
"José",
""
],
[
"Zhong",
"Zhen",
""
]
] | Quantum gravity phenomenology suggests the interesting possibility that black holes are not eternal. Collapse could be halted by some unknown mechanism, or Hawking radiation might leave behind a regular spacetime. Here we investigate a simple bouncing geometry, with (outer and inner) apparent horizons but no event hori... |
1512.01172 | Ozcan Sert | \"Ozcan Sert | Regular Black Hole Solutions of the Non-minimally Coupled $Y(R)F^2$
Gravity | 11 pages, some typos are corrected | Journal of Mathematical Physics 57, 032501 (2016) | 10.1063/1.4944428 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study we investigate regular black hole solutions of the
non-minimally coupled $ Y(R)F^2 $ gravity model. We give two regular black hole
solutions and the corresponding non-minimal model for both electrically or
magnetically charged cases. We calculate all the energy conditions for these
solutions.
| [
{
"created": "Thu, 3 Dec 2015 17:51:19 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2016 08:46:15 GMT",
"version": "v2"
}
] | 2016-03-25 | [
[
"Sert",
"Özcan",
""
]
] | In this study we investigate regular black hole solutions of the non-minimally coupled $ Y(R)F^2 $ gravity model. We give two regular black hole solutions and the corresponding non-minimal model for both electrically or magnetically charged cases. We calculate all the energy conditions for these solutions. |
1609.01964 | Mohammad Malekjani | Mohammad Malekjani, Spyros Basilakos and Neda Heidari | Spherical collapse model and cluster number counts in power law $f(T)$
gravity | 9 pages, 7 figures, accepted in MNRAS | MNRAS 466(3), 3488 (2017) | 10.1093/mnras/stw3367 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the spherical collapse model (SCM) in the framework of spatially
flat power law $f(T) \propto (-T)^{b}$ gravity model. We find that the linear
and non-linear growth of spherical overdensities of this particular $f(T)$
model are affected by the power-law parameter $b$. Finally, we compute the
predicted number... | [
{
"created": "Sat, 3 Sep 2016 15:54:19 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Dec 2016 06:34:36 GMT",
"version": "v2"
}
] | 2017-02-17 | [
[
"Malekjani",
"Mohammad",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Heidari",
"Neda",
""
]
] | We study the spherical collapse model (SCM) in the framework of spatially flat power law $f(T) \propto (-T)^{b}$ gravity model. We find that the linear and non-linear growth of spherical overdensities of this particular $f(T)$ model are affected by the power-law parameter $b$. Finally, we compute the predicted number c... |
1412.3604 | Kourosh Nozari | Amir Etemadi and Kourosh Nozari | A note on Hilbert Space Representation of Quantum Mechanics with Minimal
Length | 12 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some fundamental issues related to the Hilbert space representation
of quantum mechanics in the presence of a minimal length and maximal momentum.
In this framework, the maximally localized states and quasi-position
representation introduced by Kempf et al. are reconsidered and modified. We
show that all stu... | [
{
"created": "Thu, 11 Dec 2014 11:10:04 GMT",
"version": "v1"
}
] | 2014-12-12 | [
[
"Etemadi",
"Amir",
""
],
[
"Nozari",
"Kourosh",
""
]
] | We study some fundamental issues related to the Hilbert space representation of quantum mechanics in the presence of a minimal length and maximal momentum. In this framework, the maximally localized states and quasi-position representation introduced by Kempf et al. are reconsidered and modified. We show that all studi... |
1910.07337 | Huan Yang | Huan Yang, B\'eatrice Bonga, Zhipeng Peng, Gongjie Li | Relativistic Mean Motion Resonance | 19 pages, 10 figures | Phys. Rev. D 100, 124056 (2019) | 10.1103/PhysRevD.100.124056 | null | gr-qc astro-ph.EP astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mean motion resonances are commonly seen in planetary systems, e.g., in the
formation of orbital structure of Jupiter's moons and the gaps in the rings of
Saturn. In this work we study their effects in fully relativistic systems. We
consider a model problem with two stellar mass black holes orbiting around a
supermas... | [
{
"created": "Wed, 16 Oct 2019 13:30:13 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Yang",
"Huan",
""
],
[
"Bonga",
"Béatrice",
""
],
[
"Peng",
"Zhipeng",
""
],
[
"Li",
"Gongjie",
""
]
] | Mean motion resonances are commonly seen in planetary systems, e.g., in the formation of orbital structure of Jupiter's moons and the gaps in the rings of Saturn. In this work we study their effects in fully relativistic systems. We consider a model problem with two stellar mass black holes orbiting around a supermassi... |
gr-qc/0302064 | Jorge Pullin | Rodolfo Gambini, Rafael Porto and Jorge Pullin | Consistent discrete gravity solution of the problem of time: a model | 15 pages, no figures | null | 10.1142/9789812791238_0004 | LSU-GRG-021603 | gr-qc hep-th | null | The recently introduced consistent discrete lattice formulation of canonical
general relativity produces a discrete theory that is constraint-free. This
immediately allows to overcome several of the traditional obstacles posed by
the ``problem of time'' in totally constrained systems and quantum gravity and
cosmology... | [
{
"created": "Sun, 16 Feb 2003 17:13:57 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Porto",
"Rafael",
""
],
[
"Pullin",
"Jorge",
""
]
] | The recently introduced consistent discrete lattice formulation of canonical general relativity produces a discrete theory that is constraint-free. This immediately allows to overcome several of the traditional obstacles posed by the ``problem of time'' in totally constrained systems and quantum gravity and cosmology. ... |
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